МАТРИЦА, СИСТЕМА И СПОСОБ СОВМЕСТНОЙ ЭКСТРУЗИИ МНОЖЕСТВА ЖИДКОСТНЫХ СЛОЕВ

Заявленное изобретение относится к матрице для совместной экструзии, системе совместной экструзии и способу совместной экструзии множества жидкостных слоев. Техническим результатом заявленного изобретения является сохранение физической целостности и независимых свойств микрослоев получаемой пленки в сочетании с обычными более толстыми слоями. Технический результат достигается матрицей для совместной экструзии множества жидкостных слоев, которая содержит пуансон для начального формообразования, одну или несколько распределительных плит. Причем канал для выпуска жидкости из каждой плиты гидравлически сообщается с пуансоном для начального формообразования и служит для осаждения жидкостного слоя на этот пуансон. Узел формирования микрослоев содержит пуансон для микрослоев и множество микрослойных распределительных плит. Причем канал для выпуска жидкости из каждой этой плиты гидравлически сообщается с пуансоном для формирования микрослоев и служит для осаждения жидкостного микрослоя на этот ...

СРЕДСТВО ПРОКЛАДКИ ЖГУТА ПРОВОДОВ

Раскрыты способ и устройство для осуществления средства прокладки жгута проводов. Примерное средство прокладки жгута проводов для транспортного средства включает в себя экструдированную сердцевину, выполненную из термореактивного полимера. Примерное средство прокладки жгута проводов также включает в себя множество проводов, расположенных вокруг внешней части экструдированной сердцевины. Дополнительно, средство прокладки жгута проводов включает в себя крепежный слой для прикрепления множества проводов к экструдированной сердцевине. 3 н. и 10 з.п. ф-лы, 5 ил.

СПОСОБ ПРОИЗВОДСТВА МНОГОФУНКЦИОНАЛЬНОГО ЭЛАСТИЧНОГО СЛОИСТОГО МАТЕРИАЛА

Заявленная группа изобретений относится к способу формирования эластичных пленочных нетканых многослойных материалов и к эластичным многослойным материалам, сформированным с помощью указанного способа. Техническим результатом заявленной группы изобретений является создание более дешевого поточного способа производства эластичных нетканых слоистых материалов совместно с производством эластичного пленочного материала, с помощью которого можно производить множество эластичных слоистых материалов. Технический результат достигается в способе формирования эластичных пленочных нетканых многослойных материалов. Способ предусматривает экструдирование термопластичной полимерной композиции, содержащей эластичный полимер. Затем выдувание экструдированной термопластичной полимерной композиции с образованием выдуваемого пленочного пузыря. Потом направление пузыря к первому зажиму, образованному между парой роликов, для сплющивания пузыря в образующийся пленочный лист. Обеспечение по меньшей мере первого ...

СПОСОБЫ И СИСТЕМЫ ОПЕРАТИВНОГО КОНТРОЛЯ ФУНКЦИОНАЛЬНОГО СЛОЯ ПЛЕНКИ, СОДЕРЖАЩЕГО ПОДДАЮЩИЙСЯ ОБНАРУЖЕНИЮ КОМПОНЕНТ

Изобретение относится к способу оценки непрерывности функционального слоя полотна. Техническим результатом является повышение скорости и эффективности проверки нарушений непрерывности слоев пленки без прерывания процесса изготовления пленки и без разрушения какой-либо ее части. Технический результат достигается способом оценки непрерывности функционального слоя полотна, который включает формирование полотна посредством экструзии термопластичного материала через кольцевую матрицу с получением кольцевой ленты, закалку этой ленты и сплющивание в плоскую конфигурацию, из которой впоследствии изготавливают множество пакетов. Продвижение полотна проводится со скоростью 5 метров в минуту. Функциональный слой полотна содержит смесь термопластичной композиции и поддающегося обнаружению компонента, который присутствует в термопластичной композиции на уровне, поддающемся обнаружению в функциональном слое полотна. Обнаружение присутствия функционального слоя и нарушения непрерывности функционального ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ИЗГОТОВЛЕНИЯ БЕСШОВНОЙ СЪЕДОБНОЙ ЦЕЛЛЮЛОЗНОЙ ОБОЛОЧКИ

... 1. Способ изготовления бесшовной съедобной целлюлозной оболочки из недериватной целлюлозы, в котором раствор недериватной целлюлозы в третичном амин-N-оксиде, из добавок и воды, экструдируют в виде рукава из кольцевого мундштука и через воздушный зазор направляют вниз в водяную ванну для упрочнения целлюлозы и добавок и удаления амин-N-оксида из целлюлозы, далее целлюлозную оболочку выводят из водяной ванны, отличающийся тем, что целлюлозную оболочку очищают за счет опрыскивания подогретой водой, при этом во время опрыскивания оболочку наклонно транспортируют вверх, затем оболочку пропускают по меньшей мере через два промывочных участка и один участок пластификации, и после выхода с участка пластификации в виде мокрой оболочки в уплощенном состоянии подвергают предварительной сушке, до того как раздутая оболочка высушивается до окончательной влажности. 2. Способ по п.1, отличающийся тем, что целлюлозную оболочку высушивают до влажности от 30 до 70% влажности мокрой оболочки. 3. Способ по ...

ЛИОЦЕЛЛОВЫЙ МАТЕРИАЛ ДЛЯ ТАБАЧНОГО ФИЛЬТРА И СПОСОБ ЕГО ПРИГОТОВЛЕНИЯ

ЭКОЛОГИЧЕСКИ БЕЗОПАСНАЯ СИСТЕМА ХРАНЕНИЯ (ВАРИАНТЫ), СПОСОБ ИЗГОТОВЛЕНИЯ СИСТЕМЫ ХРАНЕНИЯ И ИЗДЕЛИЕ ДЛЯ ХРАНЕНИЯ, ИЗГОТОВЛЕННОЕ ТАКИМ СПОСОБОМ

... 1. Экологически безопасная система хранения, включающая:биоразлагаемый пластиковый материал, при этом биоразлагаемый пластиковый материал состоит в основном из:полиэтилена низкой плотности;добавки из биоразлагаемого пластикового материала; а такжедобавки для смягчения полимера; а такжекак минимум одно индивидуальное отделение из биоразлагаемого пластикового материала с внешней и внутренней стороной, в которой, по меньшей мере, одно устройство для запечатывания устанавливается на первую и вторую сторону внутренней поверхности.2. Система по п.1, характеризующаяся тем, что полиэтилен низкой плотности составляет примерно 93,1-94,9 процентов от веса биоразлагаемого пластикового материала, биоразлагаемая добавка пластиковых материалов составляет примерно 0,5-1,9 процента от веса биоразлагаемого пластикового материала, а добавка для смягчения полимера - около 4,1-5,9 процентов веса биоразлагаемого пластикового материала.3. Система по п.2, характеризующаяся тем, что используется биоразлагаемый ...

ЛИОЦЕЛЛОВЫЙ МАТЕРИАЛ С МОДИФИЦИРОВАННЫМ ПОПЕРЕЧНЫМ СЕЧЕНИЕМ ДЛЯ ТАБАЧНОГО ФИЛЬТРА И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Blasenformende und stabilisierende Vorrichtung zum Gebrauch im kontinuierlichen Extrusionsverfahren zur Herstellung von Blasfolien.

LICHTABDECKUNG, INSBESONDERE PLATTEN- ODER SCHALENFOERMIGE LEUCHTENABDECKUNG

DICHTUNGSSTRANG FUER FAHRZEUGTUEREN

METHOD OF PRODUCING BIAXIALLY ORIENTED FILM OF THERMOPLASTIC RESIN AND APPARATUS THEREFOR

Abzugsvorrichtung für Schlauchbahnen aus Kunststofffolie

BLASFOLIENANLAGE, REVERSIEREINRICHTUNG UND SCHALTSCHRANK

Die Erfindung betrifft eine Blasfolienanlage zum Herstellen einer Folienbahn aus thermoplastischem Kunststoff mit einer Bearbeitungstrecke, welche vertikal verlaufende Streckenabschnitte umfasst, mit einer Vielzahl an Bearbeitungseinrichtungen entlang der Bearbeitungstrecke, mit vertikal übereinander angeordneten begehbaren Podesten für einen Zugang zu einzelnen Bearbeitungseinrichtungen, und mit wenigstens einem Schaltschrank für elektrische Komponenten der Blasfolienanlage, wobei wenigstens ein Schaltschrank um eine Vertikaldrehachse reversierend an der Blasfolienanlage angeordnet ist.

Verfahren zum Herstellen von fuer die Weiter-verarbeitung zu Beuteln mit Schnurzug bestimmten Folien

Verfahren und Vorrichtung zur Herstellung von Schlauchfolien aus Thermoplasten

Flattened tubular thermoplastic film - from tube extruded in multi-layered manner in zones of subsequently-formed edge folds

Tubular thermoplastic film is produced by blowing out an extruded tube, and flattering the resulting tube with two edge folds. In the region of the edge folds the tube is extruded in a multi-layered esp. two-layered manner, with retention of its wall thickness. Pref. a mandrel-like piece is arranged in the annular gap of the extrusion die in the region of the edge folds and the die is constructed zonally as a multi-layer die. The piece passenes borings or channels for supplying and sucking out compressed air, the channels discharging into the space between the layers.

VERFAHREN UND VORRICHTUNG ZUM HERSTELLEN EINER FOLIE MIT KÖRNIGEM MATERIAL DARIN

Spreizvorrichtung fuer Schlauchfolienblasanlagen

VERFAHREN ZUR HERSTELLUNG VON FUER ELEKTRISCHE EINRICHTUNGEN GEEIGNETEN POLYPROPYLENFOLIEN

Crosslinking blown thermoplastics tube on leaving extruder - esp. by heating before it reaches final diameter

The method consists of extruding tubular sheet through an annular die, inflating the tube to expand it to a larger dia. and keeping the tube closed at a certain distance from the die. The tube is cross-linked in a zone within the inflating region, before the tube dia. has been fully expanded to its max. value. Pref. the tube, after passing through the inflating and cross-linking zone, immediately enters a stretching zone in which it is expanded to its final dia. using the same internal pressure. The die may be a double-ring die which simultaneously expels and internal layer of adhesive to coat the inside of the tube before the cross-linking operation. The process is for the prodn. of any plastics cross-linked tube by the blowing process e.g. PVC or polyethylene.

Verfahren zum Kaschieren einer Schlauchfolie

Die Erfindung betrifft ein Verfahren zum Kaschieren einer bevorzugt mittels Blasfolien-(Co)-Extrusion hergestellten Schlauchfolie (1) mit einem in Bezug auf Harz oder Flüssigkeiten saugfähigen Material, wobei die Schlauchfolie (1) über ihren gesamten Umfang mit mehreren, sich überlappenden oder unmittelbar sich an ihren Stirnseiten gegenüberliegenden Schichten (10, 11, 12, 13; 20, 21, 22; 30, 31), die bezüglich Harz oder Flüssigkeiten saugfähiges Material enthalten, kaschiert wird, so dass im Wesentlichen keine von den aufkaschierten Schichten (10, 11, 12, 13; 20, 21, 22; 30, 31) unbedeckten Bereichen entlang des Umfangs der Schlauchfolie (1) mehr vorhanden sind. Auch betrifft die Erfindung eine derart kaschierte Schlauchfolie sowie verschiedene Verwendungen.

METHOD AND APPARATUS FOR MAKING O-RINGS

PULL-OFF DEVICE FOR TUBULAR PLASTIC FILMS

Film-blowing machine, producing film tubing from an extruder with stationary blowing head, has a draw-off arrangement whereby the tubing is laid flat in an arrangement which oscillates about a vertical axis and has traction rollers with horizontal axes. At least two diverter rods with horizontal axes are positioned between that arrangement and a stationary reeling point; these rods can turn relative to the arrangement concerned. The first rod swivels about a vertical axis at a distance from the vertical axis of the blowing machine itself, and the rod axis plus the oscillating arrangement turn about the vertical axis of the machine. The second rod also turns about a vettical axis at a distance from the main machine axis; the final film tubing passes from this second rod to its reel-up in a plane which is parallel to the plane through the main machine axis and the vertical axis of the second rod.

VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON IN ZWEI RICHTUNGEN IN KONTROLLIERTEM MASS AUF WAERME SCHRUMPFENDEN VERNETZTEN SCHLAEUCHEN

Herstellung von Cellulosenahrungsmittelhüllen

Verfahren und Vorrichtung zur Herstellung eines Fadens mit seitlichen Abzweigungen

Einrichtung zur elektrischen Vorbehandlung der Innenflaechen von duennwandigen schlauchartigen Huellen aus Kunststoff

Steckverbindung fuer Rohre oder Formstuecke aus Kunststoff

Improvements in or relating to the manufacture of plastic tubes

... 978,203. Tubes and films ; moulding thermoplastic material. IMPERIAL CHEMICAL INDUSTRIES Ltd. April 10, 1963 [Dec. 3, 1962], No. 45467/62. Addition to 787,479. Headings B5A and B5B. In the production of tubular films by inflation, the tube of thermoplastic material is passed between a pair of substantially parallel nip rollers 9 spaced apart to such an extent that the tube is flattened between them, and encircles a stationary probe 15 (Fig. 2), located at the side of and outside the line of the nip, so that creasing of the tube at the edge is prevented. As shown, two such probes 15, 16 of substantially pear-shaped cross-section may be used, or alternatively only one probe may be used, the other edge of the tube passing through the nip. In Fig. 4, one edge only of the tube is internally supported on the stationary probe 25, the other edge 26 projecting outside the nip by an amount which permits a substantially gas-tight seal. to be maintained between the portions of the tube before and after ...

THE HEAT STABILISATION OF ORIENTED THERMOPLASTIC FILMS

... 1,248,171. Heat treatment of tubular film. IMPERIAL CHEMICAL INDUSTRIES Ltd. 18 Dec., 1969 [3 Jan., 1969], No. 479/69. Heading B5B. A process for the heat stabilization of tubular films of oriented thermoplastic materials comprises feeding such a tubular film filled with gas under pressure through a zone where it is heated to the required heat setting temperature gas being supplied under pressure to the outside of the tube to prevent any undesirable expansion of the tube. As shown, film is extruded from an annular extrusion die 2, to form a tubular film 1, and is cooled by passing over a mandrel 3, and/or through a cooling bath 4. The tube is drawn off by nip rolls 7, whose width is narrower than the collapsed tube, and which are rotating at a greater rate than the extrusion rate, thus forming an air tight seal on the mandrel 3, and preventing the inflation pressure from rupturing the tube at its point of extrusion. The tube is then heated to its orientation temperature by circular infra-red ...

PROCESS AND APPARATUS FOR CONTROLLING DIMENSIONS IN PLASTICS EXTRUSIONS

... 1372501 Controlling thickness of foamed plastics extrusions OWENS-ILLINOIS Inc 3 Oct 1972 45551/72 Heading B5A [Also in Division G3] In the production of a foamed thermoplastics sheet, e.g. of polystyrene, by extrusion either from a flat sheet die or, as in the described embodiment, by extrusion of a tube 30 which is slit by knives 34 at diametrically opposed locations 31, uniformity of thickness of the sheet transversely of its direction of advancement from the die is obtained by measuring the thickness at a number of locations spaced transversely across the advancing sheet, and either manually or automatically raising or lowering the temperature of the die lips, in areas forming the regions of the sheet at which the thickness are measured, respectively to increase or decrease the thickness of the sheet at the locations. The temperatures are controlled by a plurality of independently controlled heating and/or cooling heat exchangers circumferentially spaced around at least one die lip, ...

MANUFACTURE OF PLASTIC FILM

... 1351119 Recycling plastics extrusion waste METAL BOX CO Ltd 28 July 1971 [29 July 1970] 36694/70 Headings B5A and B5B [Also in Division B1] An extruded blown tubular or flat plastics film 14, is trimmed at both edges to a uniform width, by slitter means 13, with the trimmed material being returned pneumatically to the hopper 11 of the extruder 10 with continuous movement along a path in which: the continuous strip cut by the means 13 are granulated into flakes during passage through a granulator 20; plastics granules are continuously added to the flake from a hopper 22 via a metering unit 27; and the mixture of flakes and granules pass through a cyclone separator 12 in passage to the hopper 11 containing a stirrer. The pneumatic conveyance is effected by a fan 24 which, by suction, draws each continuous trimmed strip through ducts 15 and 16 to the granulator 22, and the flake therefrom through a duet 26 into which the granules are added from the means 27, the mixture being blown by the ...

TRANSVERSELY RIBBED FILMS

... 1379381 Sheet forming; extrusion LA CELLOPHANE 26 Nov 1971 [27 Nov 1970] 22913/74 Divided out of 1379045 Headings B5A and B5B A method of strengthening a film of extruded thermoplastic material, e.g. polyolefin, polyethylene, polypropylene or P.V.C., comprises blow extruding the material in the form of a sleeve, and downstream of the extrusion die forming ribs helically around the sleeve by extruding thermoplastic material from at least one additional extrusion nozzle rotating around the sleeve during the blow extrusion. The additional nozzle is located sufficiently close to the extrusion die, for the extrudate to be soft at the point of application of the ribs.

BLOWN TUBE PRODUCTION

... 1396749 Non-crystalline films; extruded tubular film LECO INDUSTRIES Ltd 21 Aug 1972 38782/72 Headings B5B and B5A Tubular film is extruded and inflated from conventional die 14 and cooled in a three-stage process. In the first stage the tube is cooled to a temperature at which crystallites are formed. This is accomplished by means of air-ring A, the cooling air being supplied by conduit 49 and playing on to the film through aperture 48. In the second stage, the film is annealed for a time sufficient to permit amorphous areas to form. This occurs in a dwell chamber C comprising housing 52 and a conduit 54 connected to a vacuum source. In the third stage the film is cooled by airring B, of similar construction to A, so that it solidifies without the formation of crystals. The resulting film, which is preferably of polyethylene, has crystallites dispersed throughout amorphous areas and is stated to have a high gloss and low haze (high transparency) in addition to improved tensile strength ...

Improvements in and relating to apparatus for manufacturing decorative caps for bottles

... 1,109,812. Bending, shaping and embossing foil. F. W. KUSEL. 10 March, 1966, No. 10584/66. Heading B6J. Aluminium foil bottle caps are manufactured by cutting segment-shaped blanks from a foil strip, gluing the straight edges, and forming into tubes, around mandrels, eight mandrels being carried by a rotating turret past a plurality of operating stations. After placing a segment under a mandrel at station 4, Fig. 1, it is wrapped to form the tube at stations 5 and 6. At station 7 part of the tube projecting beyond the mandrel is pre-folded into frustoconical shape by pivoted tools 13 arranged round the tube. The mandrel is formed with a rounded annular edge 8b and a recess 8c in which is slidable a die 16a actuated by a cam 17. At station 8, a plurality of discs 14a, 14b etc. effect a planetary movement round the mandrel and a movement towards the end of the mandrel, being urged inwardly by springs, so as to shape the foil round the edge 8b. At the same time, a plunger 14 is advanced and ...

Method and Means for Extrusion of Plastics Tubes for Subsequent Forming by Blowing or Vacuum

... 1,180,295. Stretching and blowing tubes. GRUBERNES SPRAENGSTOFFABRIKER A/S. 28 March, 1967, No. 14049/67. Heading B5A. Plastics tubes 3, Fig. 2, are extruded horizontally and supported from the extruder by a support member 4 used for expansion in substantially two opposite directions only transverse to the axis of the tube to flatten it. The tube may be subsequently blow-moulded or vacuum-formed in dies 5, 6. In one embodiment, the tube 3 is extruded intermittently, the support member comprising two rods 41, 411, Fig. 4, drawn through the core 2 of the extruder 1 at the same speed as the tube and which diverge to expand the tube, before expansion in the blow-mould halves 5, 6. Alternatively, the support may comprise one support rod, there being an underlying or inserted rod to expand the tube in conjunction with the support rod. Adhesion is prevented by cooling the rods.

Tubular articles, for example lamp shades

... 694,379. Moulding tubular articles from thermoplastic strip material BORKLAND, G. W. Dec. 4, 1950 [Dec. 21, 1949]. No. 29658/50. Class 87 (ii). [Also in Group XI]. A flat thin strip of thermoplastic material is bent cold into the general shape of the article, the bent strip is placed in contact with a moulding surface having the same general shape but provided with one or more cavities which form protuberances on the articles, the strip is heated, and fluid pressure is applied to the hot strip to force it against the'moulding surface and into the cavities. In making a lampshade an arcuate strip 10, which may be decorated, printed, &c. is bent into frusto-conical shape 11, Fig. 3. The ends may overlap, as at 13, or may form a butt joint, and may be secured together by a strip of thermoplastic material. The bent strip is placed in a frusto-conical recess 19 in a mould 17, the recess having cavities 20 of flower, hemisphere, ribbon or other shape. An electrical heating element 33 is lowered ...

IMPROVEMENTS IN METHODS FOR INSTALLING A SUBSTANTIALLY RIGID THERMOPLASTIC PIPEIN AN EXISTING CONDUIT

IMPROVEMENTS IN METHODS AND APPARATUS FOR REPAIRING AN EXISTING UNDERGROUND CONDUIT

IMPROVED PROCESS AND APPARATUS FOR THE PRODUCTION OF BI-ORIENTATED THERMO-SHRINKING HOSE

METHOD OF APPLYING A PLASTICS PROTECTOR ONTO A GLASS CONTAINER

... 1403401 Strengthening glassware OWENS ILLINOIS Inc 30 June 1972 [30 June 1971 30659/72 Heading C1M [Also in Divisions B5 B8 and F2] Glass bottles B are provided with shrunk-on plastics sleeves 69 by winding blanks 69a of thermoplastics material biaxially orientated in lengthwise and widthwise directions M and T on mandrels 66 of a rotating turret, heat-seaming the overlapped ends of each respective wound blank by turret-mounted, radially-movable electrical resistance-heated seams 75, to form sleeves 69, ejecting the formed sleeves upwardly from the mandrels by cam-operated strippers 70 on to bottles, which are moved in synchronism with the turret into overlying registry with the mandrels by bottle-carrying chucks 54 mounted on an endless chain 53, and shrinking the sleeves on to the bottles by passing the sleeved bottles through an oven 77. The chucks 54 each have a centre spindle provided with a roller 63 running in a cam track 64, which has depressed portions 64a and 64d, Figs. 12 (not ...

Improvements in or relating to the production of hollow articles of thermoplastic sheet material

... 1,086,824. Forming sheet material. PHILLIPS PETROLEUM CO. Feb. 15, 1965, No. 6477/65. Heading B5A. Hollow articles, e.g. boxes, crates, or hemispheres, are formed by folding a heat softened thermoplastic sheet material around a core by means of a hinged die, the superfluous edge of folds of the sheet formed between the component parts of the die being subsequently removed. In the apparatus illustrated in the Figures a continuously extruded sheet 17 is fed over continuously rotating rolls 21, 22, and intermittently rotating roll 23, to a vertically disposed hinged die 11. The die is then pivoted to a horizontal position, core 10 lowered, and the die then actuated to fold the sheet about said core, the working portion of the sheet being severed from the rest by a knife 26. During the forming operation roll 23 is stationary whilst roll 22 slowly rotates to support the loop formed by the increasing slack in the sheet. After the forming, roll 23 is re-actuated and the speed of roll 22 raised ...

Improvements in and relating to thermoplastic films

... 1,106,994. Tubular films. BAKELITE XYLONITE Ltd. 5 July, 1965 [6 July. 1964], No. 27715/64. Heading B5B. In apparatus for extruding a tube of thermoplastic material comprising an extrusion die, means for supplying an inflation pressure, and means for hauling off the tube after inflation while maintaining an inflation pressure within the tube, there are provided means associated with the die for preventing an inflation pressure from rupturing the extruding tube, and a pair of nip rolls for drawing off the tube from the die lips, constructed so that they flatten the tube across only a part of its width so that two opposed portions of the tube are brought into contact with one another in the nip, without forming crease marks in the tube. The ruptureprevention means may be an external solid support, or pressure equalization means, or may be a flexible seal inserted into the tube before the inflation zone and impassible by inflating gas. The extruded tube may be quenched prior to its passage ...

PROCESS & APPARATUS FOR PRODUCING DART FLIGHT

Forming pipe with memory of reduced form

A substantially rigid thermoplastic pipe, manufactured in a flattened and folded form so as to have a memory in this condition is stored in such form, heated to make it pliable for installation and positioned in an existing pipe. The new pipe is rounded by placing heated fluid in the passages along the folds of the pipe while its leading end is restricted. The leading end may be restricted by an end clamp which enables a hot fluid to pass completely through the pipe and thus heat its full length, or by an inflatable plug. Alternatively, an inflatable plug may be propelled to the leading end of the new pipe after its insertion and then fully inflated to block such end and thereby enable full rounding and expansion of the remainder of the new pipe.

Improvements in methods of and apparatus for formnig tubular films of synthetic thermoplastic organic material

Tubular films of synthetic organic thermoplastic material are produced by extruding the heated material through an annular extrusion orifice to form a tubular film, drawing the film over a hollow mandrel in air-sealing relation therewith and thence over driven haul-off nip rolls to form a first enclosed air space between the mandrel and the die and a second enclosed air space between the rolls and the mandrel, and passing a coolant through the mandrel to cool the film while maintaining air flow between the first and second spaces so that the pressures in them remain approximately equal. As shown in Fig. 1, hot thermoplastic material 12 is forced by the worm 13 from the supply vessel 14 through the chamber 11 of the die 10 and out of the annular die orifice 15 to form a tubular film 16. The tubular film 16 is pulled over a hollow mandrel 17 and spreader arms 30 by driven nip rolls 33, 34 and is wound upon a core 35. The mandrel 17 has rounded shoulders 28 and is suspended ...

Quenched nylon multilayer casings

An exact-fit tubular food casing for pressurized filling comprises a tubular polymeric laminate having an outer layer of crystallized and moisturized nylon and an interior moisture barrier layer. In one advantageous mode, the nylon is heat crystallized from a substantially amorphous state and simultaneously moisturized. Associated method and apparatus for making said casing are also provided. In use, the casing is stuffed to within its elastic limit so that radial deformation is uniform along the length of the tubular casing. As the exposed nylon dries out, the casing shrinks, thus further elastically stretching tightly over the stuffed food roll contained therein.

Apparatus and method for forming a blown film

An apparatus for use in the continuous extrusion of blown films includes a die 16 suitable for forming a blown film bubble, and one or more primary gas outlets 30, 32 for use in stretching and drawing the extruded film prior to it stabilizing. The primary gas outlets direct cooling gas streams on the interior and/or exterior surface of an unstabilized portion of the blown film bubble as it emerges from the die. Secondary cooling gas outlets 20 are also provided to introduce secondary gas streams into an upper stabilized portion of the blown film bubble above the bubble frost line. An exhaust conduit 80 in gaseous communication with an interior of the bubble is used to maintain the gas pressure in the blown film bubble interior at a desired pressure. The exhaust inlet 86 is located at a position adjacent the bubble frost line spaced away from the primary cooling gas outlets and towards the secondary gas outlet. Means 24 are provided for collapsing the blown film bubble.

Improvements in or relating to the manufacture of plastic film

... 941,128. Tubular films. GENERAL ENGINEERING CO. (RADCLIFFE) Ltd. Aug. 30, 1962 [Aug. 30, 1961], No. 31151/61. Heading B5B. Apparatus for forming an extruded tube of a plastic material, e.g. polyethylene, polystyrene or polyvinyl chloride, comprises means for extruding the material as a tubular film having walls of greater thickness than the required finished wall thickness, an expandable former, means for passing said tubular film over said former, and means for providing an air cushion on the outer surface of said former. As shown, a melt is extruded from press 10 at annular nozzle 13 to form a tubular film 24, of greater thickness than the required finished thickness, which passes between the toroidal former 21 and the cooling ring 23 to nip rollers 25. Former 21 is inflatable with air or liquid via pipe 22, or mechanically expansible, but on starting is in the deflated or contracted state. Compressed air is then admitted via 18, 14, 17, and passes between tube 24 and former 21 into the ...

Improved method and apparatus for longitudinal orientation of a tubular thermoplastic film in molten or semimolten state

Improvements in or relating to linear organic thermoplastic film manufacture

... 954,254. Producing biaxially oriented films. IMPERIAL CHEMICAL INDUSTRIES Ltd. April 11, 1962 [April 12, 1961 ; Dec. 22, 1961], Nos. 13192/61 and 46038/61. Drawings to Specification. Heading B5B. In the production of biaxially oriented linear organic thermoplastic tubular film by adjusting the temperature of a tube of the unoriented film material to a temperature below its melting point (defined as the temperature at which spherulites disappear using a hot stage polarizing microscope), at which temperature it can be uniformly expanded to biaxially orient it by internal gaseous pressure (with or without any additional stretch in the longitudinal direction), and expanding it and hauling off the resulting tubular film, the film is cooled by circumferentially uniformly applied draughts of air at least on the shoulder of the stretching tube so that a high internal gaseous pressure can be used to expand the tube and the tube is expanded by using a high internal gas pressure. The thermoplastic ...

Improvements in or relating to thermoplastic film manufacture

... 943,350. Tubular films. IMPERIAL CHEMICAL INDUSTRIES Ltd. Jan. 26, 1962 [Feb. 10, 1961], No. 5014/61. Heading B5B. Tubular films of organic thermoplastic material are made by extrusion from a die in association with which are means for preventing inflation pressure from rupturing the film, means for evaporating volatile liquids from and/or cooling the film, either before or after emerging from the body of the equipment containing the extrusion die, and a stationary friction brake, which may or may not form part of the body of equipment containing the extrusion die. The tube is then inflated and hauled off at a rate greater than the feed rate to biaxially orient and stretch it. The evaporative and/or cooling means render the film sufficiently " non-sticky " to prevent it sticking to, or being marred by, the friction brake. The inflating gas is supplied via a passage in the extruding die. The friction brake has surfaces shaped to contact the tubular film and may comprise an annular or cylindrical ...

Method and apparatus for producing sheet material

In a method and apparatus for making a bilaminar sheet 20 having raised pockets 48 therein containing a gas, a molten thermo-plastic material is extruded, through a cylindrical nozzle having an annular circular slot opening to form a hollow tube. The extruder has a plurality of heaters 24 around the slot to maintain the temperature of the extruded material at different temperatures as it exits, to form a molten tube having a plurality of linear sidewall portions of unequal thicknesses, which adjust to a uniform thickness prior to collapse. Concomitantly with the extrusion, a pressurized gas is discharged into the extruder through a central opening to fill and expand the tube which is then passed between two parallel rollers 26, 64 to collapse and flatten it into a sheet. At least one of the rollers has a plurality of spaced-apart recesses 28 on its outer surface to form raised pockets containing the gas. ...

Improvements in or relating to films

... 1,003,243. Tubular polypropylene films. E. I. DU PONT DE NEMOURS & CO. Aug. 13, 1963 [Aug. 17, 1962], No. 31974/63. Heading B5B. A biaxially oriented polypropylene film is made by extruding a polypropylene resin in the form of a molten tubular film at 200-275‹ C., advancing the extruded tubular film, at an ultimate rate of at least 10 times the rate of extrusion, over, but out of actual contact with, a cooling surface, the cooling surface consisting of at least two sections, the first being frustoconical with its narrow end facing the point of extrusion, and serving to cool the film to a temperature within its orientation temperature range, and a second section, continuous with the first, and 0À5 to 2 times the length of the first, being cylindrical and serving to cool the film to a setting temperature, the annular surface of the first section making an angle of 22-35 degrees with the annular surface of the second section; and expanding the tubular film to a diameter of at least 1À5 times ...

Improvements in or relating to Methods and Apparatus for the Manufacture of Hollow Plastics Articles

... 1,175,526. Table tennis balls. DUNLOP COLtd. 5 Dec., 1966 [15 Dec., 1965], No. 53346/ 65. Heading A6D. [Also in Division B5] A plastics table-tennis ball made by plunger assisted vacuum forming a series of hemispheres in a sheet dividing the sheet in two, superimposing the sheets thus formed and finally welding the opposed hemispheres together whilst at the same time removing the welded balls from the rest of the sheet.

Apparatus and Process for Producing Tubular Thermoplastic Film

... 1,175,901. Nip rolls for blown tubular film. PETRO-TEX CHEMICAL CORP. 26 Jan., 1967 [26 Jan., 1966], No. 4032/67. Heading B5B. An apparatus for flattening inflated tubular films of thermoplastic polymeric material without creasing the edges of the flattened film comprises a pair of contra-rotating co-operating parallel nip rolls providing between them a centre section which receives and flattens the centre portion of the inflated film, one of the rolls having relieved non-contacting circumferential sections at each end of the centre section or one roll having a relieved section at one end of the centre section and the other roll having a relieved section at the other end of the centre section, such that the edges of the inflated film are also flattened without creasing by forming parallel cushions which are in communication with the interior of the tubular inflated film travelling towards the nip rolls and consequently inflated with the gas inflating the tubular portion of the film. As ...

Improved heat-sealing irradiated film

The invention relates to multi- layer polymeric structure, especially film, which can be produced by irradiation crosslinking of the polymer of a first layer without damage to the heat- sealability of a heat-sealable second layer. By including in the first layer a chemical component which when blended with a polymer in the melt form produces a material which crosslinks to a greater extent under irradiation than does the same polymer alone, it is possible to reduce the dosage of irradiation required for satisfactory cross-linking and thereby reduce or prevent damage to heat-sealing characteristics of the second layer. The laminate is useful for orientation to produce heat-shrink packaging material.

BIAXIAL SYNTHETIC RESIN FILM

A food packaging film

Films having oxygen and moisture permeabilities both of 1,0 or less, and haze values of 1,0 or less, are made by melt-extrusion of a polyamide having the recurring structural unit -HN(CH2)6CO-, either as an inflated tubular film or as a flat film which is cooled in a liquid bath or on a chilled surface. The extrusion temperature of the melt may be 225 DEG -260 DEG C. The polyamide, which is made from 7-amino heptanoic acid, desirably has a reduced viscosity of from 0,7-3,0, preferably from 1,6-2,0. Reduced viscosity IR is defined by:- where D N is the difference between the flow-time of the polyamide solution and that of the solvent, No is the flow-time of the solvent, and C is the concentration of the polyamide in solution in grams per 100 mls., measurements being made at 30 DEG C. using a 3:2 by weight mixture of phenol and tetrachloroethane as solvent at a concentration of 0,2 gms. polyamide per 100 mls. solution. Oxygen and moisture permeabilities are expressed ...

RING FORMING MACHINE

... 1486608 Seaming non-metallic sheet material SPHEREX Inc 30 Oct 1974 46980/74 Heading B5K Apparatus for producing an annular article from an elongate workpiece having a longitudinal groove therein and formed of thermoplastics material comprises first and second clamps 10, 11 attached to a base 34 and adapted to grasp the ends of the workpiece, each clamp 10, 11 including a protuberance of a shape corresponding to and positioned to engage the groove in the workpiece, a heating plate 16 movably mounted on the base 34 and having first and second opposed parallel surfaces, means for presenting the two workpiece ends one to each surface of the plate 16, with bending of the workpiece into annular form, means for causing at least one of the clamps 10, 11 away from the plate after heating, and means for causing the clamps 10, 11 to bring the heated workpiece ends together to effect joining thereof to produce an annular article. Preferably, the annular article is a solid baby carriage tyre 25, Fig ...

CONTAINER FORMING AND FILLING MACHINES

Tubular film manufacture

... Apparatus for reducing a continously advancing inflated tubular film to a flattened form and for allowing and regulating the passage of fluid through the flattened section of the film from a portion of the film on one side of the flattened section that is inflated to a certain internal fluid pressure to a portion of the film on the other side of the flattened section that is inflated to a lower internal fluid pressure, comprises a coacting pair of rotatable nip rolls adapted to press against opposite sides of a tubular film passing continuously through the nip, and having either means for radially displacing an annular section of one of the nip rolls relative to an adjoining section thereof or, alternatively, means for controlling the resistance to the displacement by the tubular film of the portion of the resilient surface of such annular section at any moment in contact with the tubular film, relative to the surface of an adjoining section ...

Making and packaging flat or tubular film in reel form

In the production of films by extruding thermoplastic material through an annular orifice of uniform width, inflating the tubular film by introducing into it a gas at superatmospheric pressure, collapsing the film, and thereafter rolling up longitudinally the collapsed or flattened tubular film or flat film cut therefrom, the entire extruder, including the means for melting the plastic and forcing it under pressure to the extruder head, is rotated about the extrusion axis whilst the collapsed film is restrained against rotation, the extent of the rotation of the extruder in one direction before any reversal in the direction of rotation being such that all irregularities in thickness are distributed across the entire width of the rolled final product in successive convolutions thereof. As shown, one end of the extruder 1 is mounted on the circular track 2, wth the other end centred on the pivot bearing 3 and holding the extrusion die head 4 constantly centred above it. The wheels 6 support ...

ASEPTIC PACKAGING

... 1511128 Series of sterile, interconnected bags; aseptic packaging R J WEIKERT 1 June 1976 [2 June 1975] 22679/76 Headings B8K B8C [Also in Division B5] A series of interconnected bags 52 having aseptic interiors are formed from a lay-flat tube 36 of thermoplastic material which has a sterile interior and has been divided by means of a series of transverse heat seals 50, extending partially across the tube 36 from one longitudinal edge towards the opposite longitudinal edge thereof, into the series of interconnected bags which intercommunicate with each other through a longitudinally extending channel 54 adjacent said opposite longitudinal edge. The thermoplastic material may be polyethylene or polypropylene. Each transverse heat seal 50 may comprise two limbs 56 interconnected adjacent said opposite edge by a bight portion 58. A line of serrations 60 may be formed between the limbs of each heat seal 50. The series of bags may be stored in a roll in which case the heat seals 50 at the beginning ...

IMPROVEMENTS IN OR RELATING TO THE MANUFACTURE OF SYNTHETIC PLASTICS SHEETS

... 1,260,396. Embossed sheets and tubes; embossed films. R. KLAUS, [trading as POLYMER-SYNTHESE-WERK]. 18 Feb., 1969, No. 8784/69. Headings B5A and B5B. Endless sheets of synthetic plastics material with a grooved or ribbed surface are made by extruding the synthetic plastics material through a die having at least one of its surfaces formed with a plurality of ribs or grooves extending in the direction of extrusion and subsequently passing the extruded sheet between a pair of co-operating embossing rolls. Both surfaces of the die may be ribbed or grooved and the rolls are ribbed or grooved to emboss the sheet with a pattern of transversely or diagonally extending grooves. The extrudate is preferably tubular.

Machine for the manufacture of plastic bags comprising a closing.

Manufactoring process of polypropylene bracelets for packing.

Process and device to manufacture a sheath perforated out of plastic.

INDUCTION COUPLING FOR BRAKE CAPSTAN AT THE FLAT PUTTING

Procedure for the continuous production of endless, helically curved Kunststoffschäuchen and/or - intestines

Procedure and device for the production of Tragtaschen

VORRICHTUNG ZUR HERSTELLUNG BECHERFOERMIGER VERPACKUNGSBEHAELTER

BLOWING FOIL PLANT AS WELL AS PROCEDURE FOR THE ENTERPRISE THE SAME

SPRAYING BAG, CUT FOR THE PRODUCTION OF A SPRAYING BAG AND A PROCEDURE FOR THE PRODUCTION OF A SPRAYING BAG

ERSATZROHR ZUM EINBAU IN EINE BESTEHENDE LEITUNG SOWIE VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG DESSELBEN

VERFAHREN ZUM HERSTELLEN RUTSCHFESTER SCHICHT- FOLIEN

FOLIENSCHLAUCH AUS THERMOPLASTISCHEM KUNSTSTOFF

VERFAHREN ZUM AUSKLEIDEN EINER BESTEHENDEN LEITUNG MIT EINEM THERMOPLASTISCHEN ERSATZROHR SOWIE ERSATZROHR ZUR DURCHFÜHRUNG DES VERFAHRENS

VERY LOW-TEMPERATURE-IMPACTTOUGH, STRAINING MULTI-LAYER LAMINATE ON PP BASIS

Extruding device for the production of Schlauchfolien

PROCEDURE FOR MANUFACTURING SKID-PROOF LAYER FOILS

Vorrichtung zur Herstellung eines werkseitig vorgefertigten Wandhochzuges

Die vorliegende Erfindung betrifft eine Vorrichtung zur Herstellung eines fabrikmäßig vorgefertigten Wandhochzuges in der Art einer Hohlkehlsockelleiste für Bodenbeläge aus Kunststoff, PVC, Kautschuk, Linoleum oder artverwandten Stoffen zur Herstellung eines feuchtigkeitsdichten Wandabschlusses. Die Vorrichtung besteht aus einer Formgebungseinheit (1) für einen streifenförmigen Zuschnitt (6) aus dem Belagsmaterial und einer Schmelz- und Auftragseinheit (10) für einen bei Raumtemperatur dauerelastischen Kantenstützkeil aus Kunststoff oder Schmelzkleber und weist ein Kantenstützkeil-Formprofil (21) auf, welches aus dem schmelzflüssigen Kunststoff oder Schmelzkleber den dauerelastischen Kantenstützkeil formt, der an der konvexen Krümmung des streifenförmigen Zuschnitts (6) dauerhaft anhaftet.

HEAT SHRINKAGE-CASH SCHICHTFOLIE AND PROCEDURE FOR YOUR PRODUCTION.

FLAT PUTTING AND TRIGGER MECHANISM FOR A IN A BLOW MOULDING MANUFACTURE TUBE FOIL COURSE.

RELINING OF PIPELINES AND CHANNELS.

PROCEDURE FOR THE PRODUCTION OF PACKING FROM FOAMED PLASTIC.

PROCEDURE FOR THE PRODUCTION OF A BLASFOLIE.

PROCEDURE AND DEVICE FOR THE PRODUCTION FROM TUBES TO DROP WAYS THE IRRIGATION

LONGITUDINAL ORIENTATION OF SCHLAUCHFOLIEN FROM THERMOPLASTIC PLASTIC

Procedure and device for the production biaxial drawn Schlauchfolien

DEVICE FOR THE PRODUCTION OF FOIL COURSES FROM A TUBULAR SHEETING BY CUTTING OPEN AT THE SQUEEZED OFF BUBBLE

Procedure for the production of Schlauchfolien from thermoplastic art-drank

Procedure for the production of foils from polymere plastic

Strangpreßkopf for making a foil with angeformten catch borders of one opposite the foil other plastic

Pipe insulation with foamed adhesive closure

A pipe insulation product is provided including pipe insulation having an inside surface defining a central opening for surrounding a pipe, and a longitudinal slit defined by two opposing walls enabling the pipe insulation to be forced over a pipe to surround the pipe, a foamed adhesive layer applied to one or both of the opposing walls of the longitudinal slit, and one or more removable release strips for temporarily covering the foamed adhesive layers applied to one or both of the opposing walls of the longitudinal slit. The release strips protect the foamed adhesive layers prior to use, and the foamed adhesive layer provides for a closure with improved performance once the pipe insulation is applied to a pipe.

Fiber-reinforced film processes and films

A blown-film process for making a fiber-reinforced film comprises providing and melting at least one thermoplastic resin. The at least one thermoplastic resin is extruded through an extension die to form a film bubble. A plurality of fibers is introduced inside of the film bubble. The fibers are distributed inside of the film bubble. The film bubble is collapsed after introducing the plurality of fibers so as to form a fiber-reinforced film. The fiber-reinforced film has a first thermoplastic layer, a second thermoplastic layer, and a plurality of fibers dispersed therebetween. The film may be formed in a bag.

Structure, display apparatus and method of molding structure

A structure in which a folding notch, which is open in a direction orthogonal to an extrusion direction, is formed on a molded product formed using profile extrusion, each portion of an open edge of the folding notch is formed as a first matching portion and a second matching portion which are separate or continuous in the extrusion direction, and the molded product is folded such that the first matching portion and the second matching portion face each other.

Plastic bags, rolls of plastic bags, and tubular blown film processes of making the same

A process of manufacturing a roll of plastic bags. The process includes forming a tubular blown film, and collapsing the tubular blown film so that the tubular blown film includes a first side, a second side, a first edge, and a second edge. Openings are cut in the collapsed tubular blown film, and sealing closure mechanisms are inserted through the openings into the collapsed tubular blown film. The sealing closure mechanisms are then fixed to the collapsed tubular blown film.

Process for in-line inspection of functional film layer containing detectable component

The continuity of a functional layer of a web (32, 60, 78) is assessed by forwarding the web, detecting (42, 63) the presence of the functional layer and a discontinuity and/or a thin region in the functional layer, and generating a signal in response to the discontinuity and/or thin region. The functional layer comprises a detectable component (360) in a thermoplastic composition. The detecting is carried out by a machine vision system capable of detecting the detectable component (360) in the functional layer. The detectable component (360) can be active or passive. Also included are systems for carrying out the process.

METHOD FOR INSTALLING FILLER TUBE AND INSTALLATION STRUCTURE FOR FILLER TUBE

A method for installing filler tube includes the steps of: preparing a fuel tank including an opening; preparing an intervening member including a cylindrical member body and an annular member flange; preparing a filler tube including a cylindrical tube body and an annular tube flange; arranging the intervening member so that not only the member body is arranged in the interior of the fuel tank through the opening but also the member flange locks to a front-side peripheral face of the opening of the fuel tank; and welding not only the front-side peripheral with the tube flange but also the member flange with the tube flange by arranging a hot plate in a facing space between the front-side peripheral face and the tube flange and then warming the front-side peripheral face, the member flange and the tube flange. 1. A method for installing filler tube , the method comprising the steps of:preparing a fuel tank including an opening;preparing an intervening member including a cylindrical member body and an annular member flange bulging outward diametrically from an axial end of the member body, the intervening member having the member flange disposed at an axial end thereof;preparing a filler tube including a cylindrical tube body and an annular tube flange bulging outward diametrically from an axial end of the tube body;arranging the intervening member so that not only the member body is arranged on an inner side of the fuel tank through the opening of the fuel tank but also the member flange locks to a front-side peripheral face of the opening of the fuel tank; andwelding not only the front-side peripheral of the fuel tank with the tube flange of the filler tube but also the member flange of the intervening member with the tube flange by arranging a hot plate in a facing space between the front-side peripheral face and the tube flange and then warming the front-side peripheral face, the member flange and the tube flange.2. The method for installing filler tube according ...

Fabrication and application of nanofiber ribbons and sheets and twisted and non-twisted nanofiber yarns

A nanofiber forest on a substrate can be patterned to produce a patterned assembly of nanofibers that can be drawn to form nanofiber sheets, ribbons, or yarns.

EXTRUDABLE POLYMER COMPOSITES WITH MEMBRANE BARRIER PROPERTIES

The present disclosure generally relates to extrusion die systems. In particular, the present disclosure relates to the cyclical extrusion of materials to generate small sized grain features, generally in the range of nanosized grain features, in a tubular or profile shape, in which the individual nanolayers possess pores and/or polymer crystals oriented parallel to the extrusion flow direction and including products with enhanced permeation properties. 114-. (canceled)15. A blow molded product comprising 2-10 ,000 micro or nano polymer layers , at least one of the polymer layers including nanocomposites.16. The blow molded product according to claim 15 , wherein the blow molded product is packaging.17. The blow molded product according to claim 15 , wherein the blow molded product is a medical device.18. A blow molded product comprising 2-10 claim 15 ,000 micro or nano polymer layers claim 15 , at least one of the polymer layers including lamellar crystals aligned along the axis of extrusion.19. The blow molded product according to claim 18 , wherein the blow molded product is a packaging.20. The blow molded product according to claim 18 , wherein the blow molded product is a medical device.21. The blow molded product according to claim 18 , wherein the at least one of the polymer layers including lamellar crystals are aligned along the axis of extrusion to enhance barrier properties.22. The blow molded product according to claim 21 , wherein the blow molded product is packaging.23. The blow molded product according to claim 21 , wherein the blow molded product is a medical device.24. A blow molded product comprising 2-10 claim 21 ,000 micro or nano polymer layers claim 21 , at least one of the polymer layers including pores aligned along the axis of extrusion.25. The blow molded product according to claim 24 , wherein the blow molded product is packaging.26. The blow molded product according to claim 24 , wherein the blow molded product is a medical device.27. The ...

Reinforced bag seam, method and apparatus for making same

An apparatus for making a film bag with reinforced bag seams includes a film extruder that produces a continuous tube of film. A flattener produces a continuous web of flattened film which has an upper surface and a lower surface. A fold maker has a receiving portion positioned above the web and a displacing portion is positioned below the web that moves cyclically upward to a first position to locate a portion of the web into the receiving portion, thereby forming a fold. A fold retention device prevents the fold from opening. A presser flattens the fold against the web. A sealer seals through the fold, forming a reinforced bag seam. A cutter severs a sealed portion from an unsealed portion of the web. A transport mechanism moves the film from the extruder, through the flattener, into the fold maker, beneath the presser, into the sealer and to the cutter.

PROCESS FOR PRODUCING A POLY(VINYLIDEN FLUORIDE) DIELECTRIC MATERIAL FOR CAPACITOR WITH RICH BETA CRISTALLINE PHASE

The present invention is concerned with a dielectric material comprising a fluoropolymer, wherein at least part of the crystalline region of the fluoropolymer is in the β-phase. The dielectric material of the present invention may show relaxor-like ferroelectricity. The present invention also relates to a novel method of producing such a material, and the use of such a material in a high energy density capacitor. The method comprises layering sheets of PVDF on one another and applying pressure to the multilayer under a temperature which is preferably within 40° C. of the temperature of fusion. Further, the film is preferably quenched. 1. A dielectric material comprising a fluoropolymer , wherein the fluoropolymer comprises poly(vinylidene fluoride) (PVDF) , wherein greater than 85% of the crystalline region of the PVDF is β-phase.2. The dielectric material of wherein the fluoropolymer is poly(vinylidene fluoride) claim 1 , preferably poly(vinylidene fluoride) homopolymyer.3. The dielectric material according to claims 1 , wherein greater than 90% of the crystalline region of the fluoropolymer is β-phase claims 1 , preferably wherein greater than 95% of the crystalline region of the fluoropolymer is β-phase.45. The dielectric material to claims 1 , wherein claims 1 , the % crystallinity of the fluoropolymer is greater than 30% claims 1 , when measured using differential scanning calorimetry (DSC) claims 1 , preferably wherein the % crystallinity of the fluoropolymer is greater than 35% claims 1 , more preferably greater than 40% claims 1 , when measured using differential scanning calorimetry (DSC). . The dielectric material according claims 1 , wherein the recoverable energy density U15 J/cmor greater claims 1 , preferably 20 J/cmor greater claims 1 , more preferably 25 J/cmor greater claims 1 , when measured using an electric field of 800 kV/mm.6. The dielectric material according to wherein the Mof the fluoropolymer is greater than 200 kg/mol claim 1 , preferably ...

Woven Irrigation Tubing, Apparatus and Method of Making Same

Woven irrigation tubing comprising a woven, extrusion coated & laminated tube formed of a high density polyethylene (HDPE) outer layer, a low density polyethylene (LDPE) middle layer and a linear low density polyethylene (LLDPE) inner layer. The finished tubing is treated for ultraviolet resistance. The tubing is tied off at a distal end with a proximal end connected to a pressurized irrigation source. Watering holes are created in the tubing at spaced intervals and the resulting water streams are directed into parallel plowed furrows. The tubing is completely recyclable. The tubing is formed by manufacturing tape for the woven outer tubing cover, stretching the tape along its length to strengthen it, weaving the outer layer from the tape, flattening the woven outer layer, extrusion coating each surface of the outer layer with LDPE, laminating the LLDPE inner layer to the LDPE, reversing and winding the tubing for storage and distribution. 1. An apparatus for making woven irrigation tubing , comprising:HDPE resin;an extruder for said HDPE resin;instruments to monitor pressure and flow rates for said extruder;a flat die for said extruder suitable for forming extruded sheets of HDPE resin;a quenching tank for cooling said extruded sheets of HDPE resin;a slitter for slitting said extruded sheets of HDPE resin into tape;a tentering frame machine for stretching said tape along its length to increase longitudinal tape strength of said tape;a first winding machine and storage bobbins for winding said tape onto said storage bobbins for further processing;loom unwind stations for positioning said wound storage bobbins prior to weaving;a circular loom for weaving said tape stored on said storage bobbins into a continuous woven seamless tube;a tubing flattener for flattening said woven seamless tube;a second winding machine for winding said flattened woven seamless tube onto a master storage roll;LDPE resin;LLDPE film;an extrusion coating laminating apparatus for coating a ...

Polymer-based arterial hemangioma embolization device, manufacturing method and application of same

A polymer-based embolization device comprises a helix constructed by a linear structure. The linear structure is either a fibrous structure or composed of an A structure ( 1 ) and a B structure ( 2 ), wherein the A structure ( 1 ) is a protrusion on the linear structure and the B structure ( 2 ) is a pillar-shaped structure positioned between two A structures ( 1 ) for connecting the two A structures ( 1 ). The embolization device adopts a linear structural design and is integrally manufactured using a polymer material via a four-axis rapid forming system or via a compression method, thereby addressing issues of generation of image artifacts during CT and magnetic resonance imaging. The combination of design, material, and technique of the invention provides the device with improved flexibility and embolus formation, and can satisfy different clinical requirements. When a biodegradable macromolecular material is selected for manufacturing, blood vessel obstruction caused by implant degrading can be avoided, allowing the blood vessel to return to a normal structural state.

LYOCELL MATERIAL FOR TABACCO FILTER

A lyocell material for a cigarette filter and a method of manufacturing the same are disclose. The lyocell material which is biodegradable and eco-friendly can be manufactured by crimping lyocell multifilaments to obtain a crimped tow. 1. A lyocell material for a cigarette filter , manufactured by spinning a lyocell spinning dope comprising a cellulose pulp and an N-methylmorpholine-N-oxide (NMMO) aqueous solution to produce lyocell multifilaments which are then crimped.2. The lyocell material of claim 1 , having 15-30 crimps per inch.3. The lyocell material of claim 1 , wherein the lyocell spinning dope comprises 6˜16 wt % of the cellulose pulp and 84-94 wt % of the NMMO aqueous solution.4. The lyocell material of claim 3 , wherein the cellulose pulp comprises 85-97 wt % of alpha-cellulose claim 3 , and has a degree of polymerization (DPw) of 600-1700.5. The lyocell material of claim 1 , manufactured by a method comprising the following steps:(S1) spinning a lyocell spinning dope comprising a cellulose pulp and an N-methylmorpholine-N-oxide (NMMO) aqueous solution;(S2) coagulating the lyocell spinning dope spun in the step (S1), thus obtaining lyocell multifilaments;(S3) water-washing the lyocell multifilaments obtained in the step (S2);(S4) oil-treating the lyocell multifilaments water-washed in the step (S3); and(S5) crimping the lyocell multifilaments oil-treated in the step (S4) using a stuffer box, thus obtaining a crimped tow having 25-30 crimps per inch,wherein coagulating in the step (S2) comprises a primary coagulation using air quenching (Q/A) including supplying cold air at a temperature of 4-15° C. and a wind velocity of 5-50 m/s to the spinning dope and a secondary coagulation including immersing the primarily coagulated spinning dope in a coagulation solution,wherein the cold air is supplied outwardly from an air cooling part positioned inside a donut-shaped spinneret, and{'sup': 2', '2, 'wherein the step (S5) is performed by supplying steam having a ...

METHOD FOR PRODUCING A COMPOSITE PROFILED SECTION AND COMPOSITE PROFILED SECTION

The invention concerns a method for the production of a composite profiled section () comprising a core () and a shell (), in particular intended for use as a reinforcing element or reinforcing rod in a, preferably thermoplastic, plastic material and/or for use as a reinforcing rod for a spring clip (), wherein the shell () has shell fibres () which are laid around the circumference of the core (), wherein, subsequent to the application of the shell fibres () to the core (), at least one supporting fibre () is wound around the shell fibres () applied to the core () by means of a winding device for the production of a preformed pre-composite profiled section (). As an alternative and/or in addition thereto, a method for producing an aforementioned composite profiled section () is provided, wherein the core () is produced continuously by foam extrusion with at least one extruder. 1. A method for the production of a composite profiled section having a core and a shell for use as a reinforcing element , as a reinforcing rod in a thermoplastic or plastic material , or for the use as a reinforcing rod for a spring clip , the method comprising placing a plurality of shell fibres around a circumference of the core; and winding at least one supporting fibre around the placed shell fibres by means of a winding device for the production of a preformed pre-composite profiled section.2. The method according to claim 1 , wherein the core is fed as a strand in an inline method.3. The method of claim 1 , further comprising the step of continuously producing the core by foam extrusion with at least one extruder.4. The method of claim 1 , wherein the step of winding at least one supporting fibre further comprises spirally winding at least one supporting fibre with a distance between adjacent windings between 1 and 15 mm.5. The method of claim 1 , further comprising the steps of: producing a spring clip strand from the composite profiled section by an inline method; and extruding a ...

EXTRUDABLE POLYMER COMPOSITES WITH MEMBRANE BARRIER PROPERTIES

The present disclosure generally relates to extrusion die systems. In particular, the present disclosure relates to the cyclical extrusion of materials to generate small sized grain features, generally in the range of nanosized grain features, in a tubular or profile shape, in which the individual nanolayers possess pores and/or polymer crystals oriented parallel to the extrusion flow direction and including products with enhanced permeation properties. 114-. (canceled)15. A transport device comprising an extruded product with 2-10 ,000 micro or nano-polymer layers in tubular or profile shapes , wherein the extruded polymer or a component of the polymer comprise lamellar crystals aligned along the axis of extrusion.16. The transport device according to claim 15 , where the transport device transports water.17. The transport device according to claim 15 , wherein the transport device transports alcohol.18. The transport device according to claim 15 , wherein the transport device transports hydrocarbons.19. The transport device according to claim 15 , wherein the transport device transports blood.20. The transport device according to claim 15 , wherein the extruded product includes PET.21. The transport device according to claim 15 , wherein the extruded product includes EVOH.22. The transport device according to claim 15 , wherein the extruded product includes PA.23. The transport device according to claim 15 , wherein the extruded product includes PEO. This application is a continuation application of U.S. patent application Ser. No. 14/244,843, titled “EXTRUDABLE POLYMER COMPOSITES WITH MEMBRANE BARRIER PROPERTIES” and filed on 3 Apr. 2014, which claims benefit to U.S. provisional application 61/807,888 entitled “EXTRUDABLE POLYMER COMPOSITES WITH MEMBRANE BARRIER PROPERTIES” and filed on 3 Apr. 2013, the disclosure of which is incorporated herein by reference in its entirety.The present disclosure generally relates to extrusion die systems. In particular, the ...

Modified cross-section lyocell material for tobacco filter, and preparation method therefor

This invention relates to a lyocell material for a tobacco filter and a method of manufacturing the same, and more particularly to a lyocell fiber having a modified cross-section for a tobacco filter, wherein the cross-sectional shape of a monofilament contained in a lyocell fiber is controlled to increase the external surface area of the fiber, after which then crimps are formed, thereby exhibiting properties equal or superior to those of conventional lyocell materials, even when used in a small amount.

Continuous Polymeric Liner Production Methods for Conformable Pressure Vessels

A method and apparatus for forming a pressure vessel liner are disclosed. One method includes forming an extruded tube by extruding a parison through a die and a mandrel and forming main body sections and return line sections in the extruded tube according to a first pattern. A cross-sectional area of the return line sections is smaller than a cross-sectional area of the main body sections. The method further includes changing the pattern according to which the main body sections and the return line sections are formed from the first pattern to a second pattern without stopping the forming of the extruded tube and forming the main body sections and the return line sections in the extruded tube according to the second pattern. 1. An apparatus for forming pressure vessel liners , comprising:an extruder configured to drive a parison through a die and a mandrel to form an extruded tube; and form the extruded tube into main body sections and connecting sections according to a first pattern, a cross-sectional area of the connecting sections being smaller than a cross-sectional area of the main body sections;', 'change the pattern according to which the main body sections and the connecting sections are formed to a second pattern without interrupting the continuous cycle of the formation unit and without stopping the extrusion of the extruded tube; and', 'form the extruded tube into the main body sections and the connecting sections according to the second pattern., 'a formation unit that has a continuous cycle for forming patterns and that is configured to2. The apparatus of claim 1 , wherein the formation unit is a corrugator that includes: a motor spindle;', 'a track coupled to the motor spindle and configured to rotate about the motor spindle; and', 'a pattern of active mold elements and inactive mold elements attached to the track,', 'wherein the active mold elements are applied to the extruded tube to form the main body sections and the connecting sections and the ...

Method of Making Sandwich-Like Product Starting With Extruded Profile

A process of making a multi-layered product from an extruded sheet or web of material ( 42 ) having parallel upper and lower walls ( 130 ) and a plurality of spacers ( 134 ) extending between the upper and lower walls ( 130 ) is provided. Portions of the extruded web or extrudate ( 42 ) are removed in selected areas. The lightened web is then folded. Outer skins are then applied to the folded web. The extrudate ( 42 ) is formed into a product ( 10 ) having a plurality of cells ( 14 ). The cells ( 14 ) may have one or more openings ( 34 ), allowing access to an interior of the cell ( 14 ) and reducing the weight of the product ( 10 ).

PROCESS AND APPARATUS FOR THE MANUFACTURING OF A FIGURE-OF-EIGHT CABLE

It is disclosed a process and an apparatus for manufacturing a figure of eight cable. An extrusion head has separate extrusion dies extruding in parallel a first and second outer sheath around a first and second core, respectively, so as to provide two separate cable elements having respective longitudinal axes laying in a first plane. While the outer sheaths are in a softened state, the cable elements are passed in parallel through a twisting die which causes their longitudinal axes to lay in a second plane forming a predetermined twisting angle with respect to the first plane. This twisting causes the outer sheaths to join together, thereby forming a figure of eight cable. 1. A process for manufacturing a figure-of-eight cable , said process comprising:a) extruding a first outer sheath around a first core so as to provide a first cable element having a first longitudinal axis and a second outer sheath around a second core so as to provide a second cable element having a second longitudinal axis, said first longitudinal axis and said second longitudinal axis laying in a first plane at an extrusion head; andb) while at least one of the first outer sheath and the second outer sheath is in a softened state, passing said first cable element and said second cable element in parallel through a twisting die, said twisting die causing said first longitudinal axis and said second longitudinal axis to lay in a second plane forming a predetermined twisting angle with respect to the first plane, whereby the first outer sheath and the second outer sheath are caused to join together.2. The process according to claim 1 , wherein step b) is performed at least partially while said first outer sheath and said second outer sheath are both in a softened state.3. The process according to claim 1 , wherein said extrusion head has separate extrusion dies with axes laying parallel in the first plane.4. The process according to any of claim 1 , wherein said twisting die has a common ...

LIGHT GUIDE FILM PRODUCTION DEVICE

The present invention relates to the technical field of optical film production, and provides a light guide film production device, including a feeding unit, a fusion stirring unit, an extrusion molding unit, a cooling shaping unit, a guide leveling unit, a flattening unit, and a finished product winding unit. The cooling shaping unit is provided with a first water tank to perform heat exchange on an extruded light guide film for heat recovery, so that edge film pressing mechanisms press pressure blocks at the edge film positions using the memory effect of a memory alloy. Circulating water of the first water tank subjected to heat exchange is delivered to a second water tank disposed in the flattening unit, so that a first conveyor belt made of the memory alloy in a third drive device drives a second rolling roller set to rotate to realize secondary utilization of recovered heat. In the present invention, an air delivery mechanism with one airflow pipe to the cooling shaping unit, and the other airflow pipe to the flattening unit is further provided. According to the present invention, the heat of the light guide film production process is used to improve the quality of the light guide film and reduce the energy consumption of the light guide film production process. 1. A light guide film production device , comprising a mounting bracket , and a feeding unit , a fusion stirring unit , an extrusion molding unit , a cooling shaping unit , a guide leveling unit , a flattening unit , and a finished product winding unit which are sequentially arranged on the mounting bracket , whereinthe feeding unit comprises a feeding port which is formed at the top of the light guide film production device; the fusion stirring unit comprises a stirring tank, and a stirring drive device and a stirring blade spindle connected to an output end of the stirring drive device, as well as stirring blades connected to the stirring blade spindle, the stirring drive device and the stirring blade ...

Method for Laminating a Tubular Film

The invention refers to a method for laminating a tubular film ( 1 ) preferably manufactured by means of blown film (co-) extrusion with a material capable of absorbing resin or liquids, wherein the tubular film ( 1 ) is laminated over its entire perimeter with several layers ( 10, 11, 12, 13; 20, 21, 22; 30, 31 ) overlapping or positioned directly opposite one another on their front sides containing material capable of absorbing resin or liquids, so that essentially there are no areas left along the perimeter of the tubular film ( 1 ) not covered by the laminated layers ( 10, 11, 12, 13; 20, 21, 22; 30, 31 ). The invention also refers to a tubular film laminated in such a way and to various applications.

Method for manufacturing synthetic resin scouring pad

A method for manufacturing a synthetic resin scouring pad includes hot extruding a polymer by thermally melting a synthetic resin, along a T die having a straight extrusion port, to form a full width film sheet; cold-curing the film sheet by impregnating and quenching the extruded full width film sheet with cooling water of a cooling bath; forming flat film filaments by passing the full width film sheet lengthwise through a cutting part in which cutting blades are arranged at a predetermined width so as to dividingly-cut the full width film sheet into a predetermined width; passing the flat film filaments in the longitudinal direction through a coiling forming part to plastic-deform the flat film filaments into coil-shaped film filaments; and inputting the coil-shaped film filaments into an annular winding part so that the film filaments are wound in an annular shape to form a synthetic resin scouring pad.

LYOCELL MATERIAL FOR CIGARETTE FILTER AND METHOD FOR PREPARING SAME

Disclosed are a lyocell material for a cigarette filter and a method of preparing the same, wherein a crimped tow is manufactured using a lyocell multifilament including low-strength lyocell monofilaments, and thus the ultimately prepared lyocell material for a cigarette filter can exhibit low strength, thereby increasing processing efficiency during the manufacture of the cigarette filter. 1. A lyocell material for a cigarette filter , which is a crimped tow having a tensile strength of 1 to 2 g/d , obtained by crimping a lyocell multifilament.2. A lyocell material for a cigarette filter , which is a crimped tow obtained by crimping a lyocell multifilament comprising lyocell monofilaments having a strength of 2.0 to 3.5 g/d.3. The lyocell material of claim 1 , wherein the crimped tow has 15 to 30 crimps per inch.4. The lyocell material of claim 2 , wherein the lyocell monofilaments have a fineness of 1.0 to 8.0 denier.5. The lyocell material of claim 2 , wherein the lyocell monofilaments have an elongation of 5 to 13%.6. The lyocell material of claim 1 , wherein the crimped tow has a tensile strength of 1 to 2 g/d and an elongation at break of 5 to 7.5%.7. The lyocell material of claim 2 , wherein the crimped tow has 15 to 30 crimps per inch.8. The lyocell material of claim 7 , wherein the lyocell monofilaments have a fineness of 1.0 to 8.0 denier.9. The lyocell material of claim 7 , wherein the lyocell monofilaments have an elongation of 5 to 13%.10. The lyocell material of claim 2 , wherein the crimped tow has a tensile strength of 1 to 2 g/d and an elongation at break of 5 to 7.5%. This application is a Divisional Application of application Ser. No. 15/024,936 filed Mar. 25, 2016 (allowed), which is a National Stage of International Application No. PCT/KR2014/009006 filed Sep. 26, 2014, claiming priority based on Korean Patent Application Nos. 10-2013-0114536 filed Sep. 26, 2013, 10-2013-0163793 filed Dec. 26, 2013, and 10-2014-0128163 filed Sep. 25, 2014, the ...

CONTINUOUS PRODUCTION DEVICE AND METHOD FOR GLASS FIBER REINFORCED TAPE POLYETHYLENE COMPOSITE PIPE

Plastic pipes and a continuous production device and method for a glass fiber reinforced tape polyethylene composite pipe is provided. The main structure of the production device includes a first extruder, an inner pipe die, a vacuum sizing box, a first cooling spray box, a first tractor, a first winding machine, a first heater, a second winding machine, a second heater, an automatic tape replacing manipulator, an outer pipe extruder, an outer pipe extrusion die, an outer pipe cooling shaping die, a second cooling spray box, a second tractor, a meter counter, a fixed length cutting machine and finished pipe racks. The process of the production method totally includes four steps: inner pipe extrusion molding, continuous winding of the composite tape, outer pipe extrusion cladding, and cutting and warehousing, thus realizing the continuous on-line production of the glass fiber reinforced tape polyethylene composite pipe. 1. A continuous production device for a glass fiber reinforced tape polyethylene composite pipe , wherein the main structure includes a first extruder , an inner pipe die , a vacuum sizing box , a first cooling spray box , a first tractor , a first winding machine , a first heater , a second winding machine , a second heater , an automatic tape replacing manipulator , an outer pipe extruder , an outer pipe extrusion die , an outer pipe cooling shaping die , a second cooling spray box , a second tractor , a meter counter , a fixed length cutting machine and finished pipe racks , the pipeline connections are carried out between the inner pipe die and the vacuum sizing box , between the vacuum sizing box and the first cooling spray box , between the first cooling spray box and the first tractor , between the first tractor and the first winding machine , between the first winding machine and the first heater , between the first heater and the second winding machine , between the second winding machine and the second heater , between the second heater and ...

Agricultural film formulation, agricultural mulch film and preparation method thereof

The present invention provides an agricultural film formulation, which comprises about 40 wt % to about 70 wt % inorganic mineral powder, about 15 wt % to about 30 wt % high-density polyethylene, about 8 wt % to about 20 wt % low-density polyethylene, about 5 wt % to about 10 wt % biodegradable plastic, and an optional auxiliary agent, based on total weight of the formulation. The present invention also provides an agricultural mulch film made from the agricultural film formulation and a preparation method thereof.

Molding Hook and Loop Fastener

Provided is a molding hook and loop fastener, in which a barrier erected near left and right side edges of a substrate includes at least two rows of vertical wall arrays, and the vertical wall array positioned on the outermost side includes a plurality of gaps provided at a predetermined pitch in a length direction. At least two of the gaps are provided on the vertical wall array positioned on the outermost side with respect to a region between the engaging elements adjacent in the length direction of the substrate. Due to this, in the molding hook and loop fastener, an outer side and an inner side of the barrier can be divided by the vertical wall array, and flexibility of the molding hook and loop fastener can be improved.

Assembly and process for creating an extruded marine dock bumper

An assembly and process for forming a two stage extrusion of an elongated marine dock from a plasticized material, such as including but act limited to extruding a first generally “L” shaped bracket from a first more rigid thermoplastic, following which a cross head die arrangement is utilized in order to extrude a secondary arcuate and flexible material in extending fashion from a lower side of the “L” bracket. The secondary/flexible elastomer is extracted in an open flexed position relative to the first extruded bracket, and further such that, following completion, can be flexed into a closed engagement with an upper perpendicularly extending side of the bracket.

System and method for manufacturing electrode for secondary battery

A system for manufacturing an electrode for a secondary battery includes, a mixing unit forming a fibrillated mixture by fibrillating a powder mixture of active material powder, binder powder, and conductive material powder, a forming unit forming a mixture film by the fibrillated mixture, a pressurizing unit uniformizing a thickness of the mixture film by pressurizing rollers to form an electrode component film, first and second winding rolls each supplied and wound with the electrode component film from the pressurizing unit, a base material film roll located between first and second winding rolls and wound with a base material film, and a lamination unit configured to heat and cool to form a junction of the first electrode component film, the base material film, and the second electrode component film that are consecutively stacked.

Products having a wood grain appearance, and methods and structures for use in forming same

Structures for use in forming products having a wood grain appearance include, for example, a plurality of extruded layers having different colors/shades spirally wound about a longitudinal axis to an outer surface to define the structure. The plurality of extruded layers include varying thicknesses along a spiral length of the plurality of layers and/or portions of the plurality of extruded layers encircling the longitudinal axis include portions disposed at different distances from the longitudinal axis. In some embodiments, the spirally winding includes forming a cylindrical structure, and pressing the cylindrical structure into a cuboid structure having a square or rectangular cross-section across the longitudinal axis and at least a portion of the plurality of extruded layers defining a square or rectangle pattern across the longitudinal axis. Longitudinal portions may be cut from the structures to form the products having a wood grain appearance.

Frame for an Input and Output Device and Method for Manufacturing the Frame

A frame for an input and output device with four corners, which has a first leg and a second leg, where a strip is arranged on the first leg, open spaces are arranged in the frame profile to form the four corners such that the strip remains standing in the region of the open space, and a groove is arranged on the second leg, and where a respective corner element is arranged in each of the four corners, and each respective corner element has an element body with a first element leg and a second element leg, and where the first and second element legs are arranged substantially at right angles to one another on the element body and the corner elements are arranged in the open spaces such that the first second element legs are each arranged in the groove of the frame profile. 1. A frame for an input and output device having four corners , the frame comprising:a frame profile formed in one piece, which has a first leg and a second leg;a strip arranged on the first leg, open spaces being arranged in the frame profile to form the four corners such that the strip is left standing in a region of the open spaces; anda groove arranged on the second leg;wherein a corner element is arranged in each of the corners, and the corner element includes an element body with a first element leg and a second element leg which are arranged substantially at right angles to one another on the element body; andwherein the corner elements are arranged in the open spaces such that the first element leg and the second element leg are each arranged in the groove of the frame profile.2. The frame as claimed in claim 1 , wherein the first and second element legs are arranged at a lower end of the element body and an element head is arranged at an upper end of the element body; andwherein the element head is formed to close off the open space in the four corners such that a flat surface is present on the first leg within the frame for application of at least one of (i) a seal and (ii) adhesive ...

Method of making a weather strip and bright strip assembly for a vehicle door

Methods of making a weather strip and bright strip assembly for a vehicle door include extruding a weather strip that has a longitudinal shape along an X axis, a sealing body made of at least a first material, and a carrier body made of at least a second material that is harder than the first material. The methods further include cutting at least in part a longitudinal end of the carrier body along the X axis, and removing the longitudinal end; molding a curved or angled end onto the weather strip, in replacement of the longitudinal end, wherein the curved or angled end extends between the X axis and a Y axis; and mounting a bright strip onto the carrier body, the bright strip including a first curved or angled portion covering at least in part the curved or angled end and a second longitudinal portion covering at least in part the carrier body.

Method for producing nonaqueous electrolyte secondary battery separator

A nonaqueous electrolyte secondary battery separator, which includes a porous film containing a polyolefin-based resin as a main component, has a difference of not more than 2.5 between (a) a white index measured on a surface of the porous film which has not been irradiated with ultraviolet light having 255 W/m2 and (b) a white index measured on the surface of the porous film which has been irradiated, for 75 hours, with the ultraviolet light having 255 W/m2.

Reinforced bag seam and method for making same

A method for making a film bag with reinforced bag seams includes a film extruder that produces a continuous tube of film. A flattener produces a continuous web of flattened film which has an upper surface and a lower surface. A fold maker has a receiving portion positioned above the web and a displacing portion is positioned below the web that moves cyclically upward to a first position to locate a portion of the web into the receiving portion, thereby forming a fold. A fold retention device prevents the fold from opening. A presser flattens the fold against the web. A sealer seals through the fold, forming a reinforced bag seam. A cutter severs a sealed portion from an unsealed portion of the web. A transport mechanism moves the film from the extruder, through the flattener, into the fold maker, beneath the presser, into the sealer and to the cutter.

Heated respiratory hose wiring

A method of forming a hose includes: extruding a web of plastics material from a first extruder; helically winding the extruded web about a mandrel or at least one rotating rod to form a wall of the hose; feeding an electrical wire into a second extruder; extruding a bead of plastics material around the electrical wire from the second extruder, wherein the first electrical wire is positioned at a first location within a cross-section of the bead that comprises a bonding surface; cooling the bead to cool the plastics material adjacent the first location to prevent migration of the first electrical wire from the first location; re-heating the first bonding surface to cause the plastics material of the bonding surface to become molten; and helically winding the bead onto the hose to put the bonding surface into contact with, and to cause bonding with, the wall of the hose.

HEATED RESPIRATORY HOSE WIRING

A method of forming a hose includes: extruding a web of plastics material from a first extruder; helically winding the extruded web about a mandrel or at least one rotating rod to form a wall of the hose; feeding an electrical wire into a second extruder; extruding a bead of plastics material around the electrical wire from the second extruder such that the extruded bead includes the electrical wire at a location within a cross-section of the extruded bead; cooling the extruded bead to cool the plastics material adjacent the location to prevent migration of the electrical wire away from the location; re-heating the extruded bead to cause outer surface portions of the plastics material of the extruded bead to become molten; and helically winding the extruded bead onto and about an external surface of the wall to provide the wall a support helix that incorporates the electrical wire. 1. A method of forming a hose comprising:extruding a continuous web of plastics material of substantially uniform width and of relatively thin cross-section from a first extruder of a hose making apparatus;helically winding the extruded web about a mandrel or at least one rotating rod of the hose making apparatus to form a wall of the hose about a central axis of the hose;feeding a first electrical wire into a second extruder;extruding a first continuous bead of plastics material around the first electrical wire from the second extruder such that the first extruded bead comprises the first electrical wire at a first location within a cross-section of the first extruded bead;cooling the first extruded bead sufficiently to cool the plastics material adjacent the first location within the cross-section of the first extruded bead to prevent migration of the first electrical wire away from the first location;re-heating the first extruded bead sufficiently to cause outer surface portions of the plastics material of the first extruded bead to become molten; andhelically winding the first ...

FLEXIBLE SUBSTRATES WITH CHEMICAL AND MOISTURE RESISTANCE

Flexible packages, transdermal drug delivery devices, and methods for fabricating packages are provided. An exemplary flexible package includes a chemical and moisture resistant layer formed from poly(chlorotrifluoroethylene-co-vinylidene fluoride) (“P(CTFE-co-VDF)”) copolymer. Further, the exemplary flexible package includes a substance to be delivered. The substance is applied to or enclosed by the chemical and moisture resistant layer. 1. A flexible package comprising:a chemical and moisture resistant layer formed from poly(chlorotrifluoroethylene-co-vinylidene fluoride) (“P(CTFE-co-VDF)”) copolymer; anda substance to be delivered, wherein the substance is applied to or enclosed by the chemical and moisture resistant layer.2. The flexible package of wherein the chemical and moisture resistant layer consists of P(CTFE-co-VDF) copolymer.3. The flexible package of wherein the chemical and moisture resistant layer comprises a co-extrusion of P(CTFE-co-VDF) copolymer and an acrylonitrile copolymer claim 1 , cyclic olefin copolymer (COC) claim 1 , polyethylene terephthalate (PET) claim 1 , foil claim 1 , and/or biaxially oriented polyamide (BOPA).4. The flexible package of wherein the chemical and moisture resistant layer comprises a laminate structure including a layer of P(CTFE-co-VDF) copolymer and a layer of an acrylonitrile copolymer claim 1 , cyclic olefin copolymer (COC) claim 1 , polyethylene terephthalate (PET) claim 1 , foil claim 1 , and/or biaxially oriented polyamide (BOPA).5. The flexible package of wherein the P(CTFE-co-VDF) copolymer comprises about 4 to about 5 wt. % vinylidene fluoride (“VDF”) claim 1 , based on the total weight of the copolymer.6. The flexible package of wherein the P(CTFE-co-VDF) copolymer comprises about 2 to about 3 wt. % vinylidene fluoride (“VDF”) claim 1 , based on the total weight of the copolymer.7. The flexible package of wherein the substance is dispersed in a matrix claim 1 , and wherein the matrix is applied directly to ...

METHOD FOR PRODUCING POLYMER TUBE CONTAINING LIQUID AND BEING SEALED AT CONSTANT INTERVALS AND APPARATUS FOR PRODUCING POLYMER TUBE

Provided are a method and an apparatus for extruding into a tube and filling the tube at a high speed and simultaneously sealing the tube. Specifically provided is a method for producing a polymer tube, containing a liquid therein and being sealed at constant intervals, the method including an extrusion step of continuously melt-extruding a polymer material through a die into at least one tube, while feeding a liquid into the tube to obtain at least one liquid-containing tube; and sealing step of discontinuously pressing the at least one liquid-containing tube between a pair of pressurizing members at constant intervals to cause pressure-bonding before the tube solidifies, while continuously taking up the extruded tube. 1. An apparatus for producing a polymer tube , containing a liquid therein and being sealed at constant intervals , the apparatus comprising:a die configured for melt extrusion of a polymer material into at least one tube;a mandrel configured to feed a liquid into the at least one tube during the melt extrusion to obtain at least one liquid-containing tube;one or more rollers configured to take up the at least one liquid-containing tube; anda pair of pressurizing members configured to discontinuously press the at least one liquid-containing tube between the pair of pressurizing members to cause pressure-bonding before the tube solidifies, wherein the pair of pressurizing members is a pair of rotary horns, each horn having a protrusion, and the pair of rotary horns is configured to discontinuously press the at least one liquid-containing tube between the protrusions to cause pressure-bonding.2. The apparatus according to claim 1 , wherein the die comprises two discharge pores and a slit connecting the two discharge ports claim 1 , and one of the rotary horns has a blade which protrudes radially higher than the protrusion on the circumference.3. The apparatus according to claim 1 , comprising a guide configured to support the at least one liquid- ...

Liquid crystal polymer film, and composite film of liquid crystal polymer and polyimide and manufacturing method thereof

A liquid crystal polymer film, and a composite film of liquid crystal polymer and polyimide and a manufacturing method thereof are provided. The liquid crystal polymer film includes 63 wt % to 74 wt % of p-hydroxybenzoic acid, 21 wt % to 26 wt % of 6-hydroxy-2-naphthoic acid, and 5 wt % to 11 wt % of p-hydroxycinnamic acid. The composite film is manufactured by thermocompressing a single layer or multi layers of liquid crystal polymer film and polyimide film so that the composite film can have high flatness and the surface roughness Sa of the composite film is ranging from 0.1 μm to 10 μm. In the production process of the composite film, the composite film is rolled up and attached to a copper foil to form a high frequency substrate with good processability. After peeling the polyimide film, the liquid crystal polymer film can be thermocompressed to form a four-layered, six-layered, eight-layered or eight-layered high frequency substrate.

Polyethylene useful for producing film and molded articles in a process which uses solid state stretching

Applicants have discovered that certain polyethylene (PE) homopolymers or copolymers of ethylene and C 3 to C 10 alpha-olefin monomers are more suitable for oriented processes than other polyethylene resins In an aspect, the PE has a MFI of 0.3 g/10 min. to 5.0 g/10 min., a melting point of from 110° C. to 140° C., a density of from 0.912 g/cm 3 to 0.965 g/cm 3 (%), a haze of 10% or less, a clarity of at least 90, and a gloss of at least 60. The polyethylene is heated and formed into an article, cooled, and then the article is stretch oriented. In an embodiment, the film, tape, the melt extruded, injection blow molded, injection stretch blow molded, cast, and thermoformed articles that can be produced with this polyethylene has a thickness of 0.1 mil to 100 mils. The polyethylene exhibits excellent elasticity, toughness, stretch and optical properties for such applications.

Polyethylene useful for producing film and molded articles in a process which uses solid state stretching

Applicants have discovered that certain polyethylene (PE) homopolymers or copolymers of ethylene and C 3 to C 10 alpha-olefin monomers are more suitable for oriented processes than other polyethylene resins. In an aspect, the PE has a MFI of 0.3 g/10 min. to 5.0 g/10 min., a melting point of from 110° C. to 140° C., a density of from 0.912 g/cm 3 to 0.965 g/cm 3 (%), a haze of 10% or less, a clarity of at least 90, and a gloss of at least 60. The polyethylene is heated and formed into an article, cooled, and then the article is stretch oriented. In an embodiment, the film, tape, the melt extruded, injection blow molded, injection stretch blow molded, cast, and thermoformed articles that can be produced with this polyethylene has a thickness of 0.1 mil to 100 mils. The polyethylene exhibits excellent elasticity, toughness, stretch and optical properties for such applications.

Propylene homopolymer for high-tenacity fibers and nonwovens

The present invention relates to propylene homopolymers having a melt flow index in the range from 3.0 dg/min to 8.0 dg/min that is particularly suited for high-tenacity fibers and yarns and nonwovens. Further the present invention relates to a process for the production of such propylene homopolymers.

Transparent easy tearable film, a process for producing thereof (variants), use a composition for producing the film and use thereof

The present invention relates to a cast film or blown film comprising a composition comprising 80 to 95 wt% of a polypropylene matrix (A) with an MFRof 1 to 30 g/10min being a homopolymer or a copolymer, which has a comonomer content of less than 3 wt%, 5 to 20 wt% of an ethylene-propylene-rubber (EPR) (B) with at least 55 wt% propylene having an intrinsic viscosity (IV) measured according to ISO 1628-1 (October 1990) of 1 to 2.5 dl/g; and 0.0001 to 1 wt% of an alpha nucleating agent. The present invention relates also to a process of producing such film, use of said composition for producing the film and to use thereof.

Werkwijze voor het vervaardigen van blaasfolie en georienteerde folie.

Bimodal polyethylene copolymer composition and pipe made thereof

A bimodal ethylene-co-l-hexene copolymer composition consisting of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a melt property performance defined by a combination of melt index (5 kg), melt strength, and, optionally, shear thinning properties, and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full-notch creep test performance. A pipe consisting of the bimodal ethylene-co-l-hexene copolymer composition. A method of synthesizing the bimodal ethylene-co-l-hexene copolymer composition. A method of making the pipe. A manufactured article, which is not a pipe, comprising the bimodal ethylene-co-l-hexene copolymer composition.

Bimodal polyethylene copolymer composition and pipe made thereof

A bimodal ethylene-co-l-hexene copolymer composition consisting of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a melt property performance defined by a combination of melt index (5 kg), melt strength, and, optionally, shear thinning properties, and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full-notch creep test performance. A pipe consisting of the bimodal ethylene-co-l-hexene copolymer composition. A method of synthesizing the bimodal ethylene-co-l-hexene copolymer composition. A method of making the pipe. A manufactured article, which is not a pipe, comprising the bimodal ethylene-co-l-hexene copolymer composition.

Die, system, and method for coextruding a plurality of fluid layers

A die for coextruding a plurality of fluid layers generally includes a primary forming stem, one or more distribution plates, and a microlayer assembly. The microlayer assembly includes a microlayer forming stem and a plurality of microlayer distribution plates.

Process for production of moldings by the inflation method

A process for the production of moldings by the inflation method which is improved in the productivity in molding and can give moldings not impaired in the characteristics inherent in polyethylene, wherein moldings are produced by inflation -molding a mixture comprising polyethylene having a density of 900 to 980 (kg/m3) and polyethylene wax having a density of 890 to 980 (kg/m3) and a number-average molecular weight (Mn) of 500 to 4,000 in terms of polyethylene as determined by gel permeation chromatography (GPC) and satisfying the relationship (I): B < 0.0075 × K ... (I) wherein B is the content (% by weight) in the polyethylene wax of components having molecular weights of 20,000 or above in terms of polyethylene as determined by gel permeation chromatography; and K is the melt viscosity (mPa·s) of the polyethylene wax at 140°C.

Latent elastic nonwoven composite

A nonwoven composite that exhibits latent elastic properties is provided. More specifically, latent elasticity may be imparted by blending a thermoplastic elastomer with a polyolefin that is capable of forming semi-crystalline domains among the amorphous elastomeric chains, and then forming a film from the blend. The film is then stretched in one or more directions to orient the amorphous elastomer chains. Without intending to be limited by theory, the present inventors believe that the oriented state of the amorphous chains may be held in place by the relatively stiff semi-crystalline olefin domains. Subsequently, the stretched film may be activated (e.g., heated) to shrink the film and provide it with “latent” stretchability. For instance, the stretched film may be heated at or above the softening temperature of the polyolefin to soften the crystalline domains and allow the amorphous chains to return to their unoriented state. As a result of the present invention, the elastic film may be extended and recover from its unoriented state.

Latent elastic nonwoven composite

A nonwoven composite that exhibits latent elastic properties is provided. More specifically, latent elasticity may be imparted by blending a thermoplastic elastomer with a polyolefin that is capable of forming semi-crystalline domains among the amorphous elastomeric chains, and then forming a film from the blend. The film is then stretched in one or more directions to orient the amorphous elastomer chains. Without intending to be limited by theory, the present inventors believe that the oriented state of the amorphous chains may be held in place by the relatively stiff semi-crystalline olefin domains. Subsequently, the stretched film may be activated (e.g., heated) to shrink the film and provide it with “latent” stretchability. For instance, the stretched film may be heated at or above the softening temperature of the polyolefin to soften the crystalline domains and allow the amorphous chains to return to their unoriented state. As a result of the present invention, the elastic film may be extended and recover from its unoriented state.

Multilayer structure comprising polypropylene

Disclosed is a composition that comprises or is produced from a first ethylene α-olefin copolymer, a modified first ethylene α-olefin copolymer, and a second ethylene α-olefin copolymer or propylene α-olefin copolymer. Also disclosed is a multilayer film or sheet structure containing at least one barrier layer; at least one predominantly propylene-based layer, at least one predominantly ethylene-based layer, or both; and at least one adhesive layer produced from the composition. Further disclosed is a produced for producing a multilayer structure using the composition as adhesive layer.

bimodal copolymer composition, method of synthesizing bimodal copolymer composition, tube, method of making a tube, and manufactured article

COMPOSIÇÃO DE COPOLÍMERO BIMODAL, MÉTODO PARASINTETIZAR A COMPOSIÇÃO DE COPOLÍMERO BIMODAL, TUBO,MÉTODO PARA SE PRODUZIR UM TUBO, E, ARTIGO FABRICADO. Trata-se de uma composição de copolímero bimodal de etileno-co-1-hexeno que consiste essencialmente em um componente de maior peso molecular e um componente de menor peso molecular e, quando na forma fundida a 190 graus Celsius, é caracterizada por um desempenho de propriedade de fusão definido por uma combinação de índice de fusão (5 kg), resistência à fusão e, opcionalmente, propriedades de desbaste de cisalhamento e, quando na forma sólida, é caracterizado por um desempenho de propriedade de crescimento de rachadura lento definido por uma combinação de módulo de endurecimento por deformação e desempenho de teste de fluência de entalhe completo acelerado. Um filme soprado que consiste, essencialmente, na composição de copolímero bimodal de etileno-co-1-hexeno. Um método para sintetizar a composição de copolímero bimodal de etileno-co-1-hexeno. Um método para se produzir o filme soprado. Um artigo fabricado que compreende a composição de copolímero bimodal de etileno-co-1-hexeno. BIMODAL COPOLYMER COMPOSITION, METHOD TO SYNTHETIZE THE BIMODAL COPOLYMER COMPOSITION, TUBE, METHOD TO PRODUCE A TUBE, AND, MANUFACTURED ARTICLE. It is a bimodal ethylene-co-1-hexene copolymer composition that consists essentially of a higher molecular weight component and a lower molecular weight component and, when in molten form at 190 degrees Celsius, it is characterized by performance of melt property defined by a combination of melt index (5 kg), melt strength and optionally shear grinding properties and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full notch creep test performance. A blown film consisting essentially of the bimodal copolymer composition of ethylene-co-1-hexene. A method to synthesize the bimodal copolymer ...

Polyethylene films and processes for making them

Provided are films such as high-stalk films made from polyethylene polymers, and methods for making these films. Such films preferably have at least one of the following properties: (a) MD 1% Secant Modulus of less than 400 MPa, (b) Elmendorf Tear MD of at least 100 g/mil, (c) Dart drop of at least 200 g/mil, (d) puncture resistance break energy of at least 120 mJ/μιη, (e) TD shrink at 150°C of at least 40% or at least 30% at 120°C; and (f) haze value of less than 40%.

Polyethylene films and processes for making them

Change head for a tool change apparatus

Method of feeding tire component

A method of feeding a tire component according to the present invention comprises: winding in rolls tubular films formed of thermoplastic elastomer obtained by blending thermoplastic resin and rubber to form rolled bodies having sizes corresponding to different nominal rim diameters of tires; unwinding the tubular film from the rolled body corresponding to a nominal rim diameter of a green tire when the green tire is built, and cutting the unwound tubular film so as to form a piece having a necessary width corresponding to a size of the green tire to form a tire component; and feeding the tire component to a tire building machine.

双峰聚乙烯共聚物组合物以及由其制成的管材

一种双峰乙烯‑共‑1‑己烯共聚物组合物，其由较高分子量组分和较低分子量组分组成，并且当在190摄氏度下呈熔融形式时，其特征在于由熔融指数(5kg)、熔体强度和任选的剪切稀化性质的组合所限定的熔体性能，并且当呈固体形式时，其特征在于由应变硬化模量和加速全缺口蠕变试验性能的组合所限定的慢速裂纹扩展性能。一种管材，其由所述双峰乙烯‑共‑1‑己烯共聚物组合物组成。一种合成所述双峰乙烯‑共‑1‑己烯共聚物组合物的方法。一种制造所述管材的方法。一种并非管材的制品，其包含所述双峰乙烯‑共‑1‑己烯共聚物组合物。

Copolymers of propylene with hexene-1 and blown films obtained from them

A copolymer of propylene with hexene-1 containing from 5 to 9% by weight of recurring units derived from hexene-1, having a melting temperature from 125° C. to 140° C. and Melt Flow Rate (ASTM D1238, 230° C./2.16 Kg) from 0.1 to 3 g/10 min., is used to produce blown films having valuable mechanical and optical properties.

Propylene homopolymer for high-tenacity fibers and nonwovens

Process for forming film from low strain hardening polymers

A process is disclosed for forming blown film of a low strain hardening polymer, such as a low pressure polymerized-low density ethylene copolymer, including an improved film bubble expanding technique which permits high production rates to be achieved with good film bubble stability. Advantageously, most of the films produced by the process have a relatively high degree of film clarity.

Process for substantially eliminating surface melt fracture when extruding ethylene polymers

A process for substantially eliminating surface melt fracture during extrusion of an ethylene polymer wherein the die land has a surface fabricated from a material which increases adhesion between the die land surface and the polymer.

Process for eliminating surface melt fracture during extrusion of thermoplastic polymers

A process and apparatus as provided for substantially eliminating surface melt fracture during extrusion of a thermoplastic polymer such as a molten narrow molecular weight distribution, linear, ethylene copolymer, by using a die having a die land region defining opposing surfaces at least one of which is fabricated from an alloy containing 5 to 95 parts by weight zinc and 95 to 5 parts by weight of copper.

Process for the preparation of blown film

Blown film on the basis of polyethylene with a density below 910 kg/m³ is prepared by extruding the molten polymer at temperatures of the melt at the die gap of at most 160◊C, the die gap width being at least 1mm, blowing the molten polymer to a balloon, cooling, flat­tening and rolling it up. Films that have been prepared this way have improved mechanical and optical properties.

Preparation of blown film

Process for the preparation of blown film

A process for the preparation of highly oriented blown polyethylene film is disclosed. The film is mono-axially oriented and has improved stiffness, tear resistance and tensile strength. In the process, a molten polymer composition is extruded through an annular die gap of at least 2 mm at a melt temperature at the die gap of below 160° C. The process achieves films which exhibit an x-ray diffraction intensity ratio max/min of the 110 retleation band of at least 20 and an angle α between the average orientation direction of the polymer molecules and film extrusion direction of at most 20°.

Process for reducing surface aberrations

The processes and resins of the present invention allow the extrusion of polymer products, such as polymer films, that have a reduced occurrence of surface aberrations, e.g., surface melt fracture and/or haze bands and/or haze. Preferably, the polymer products produced in accordance with the present invention are substantially free of surface aberrations even when manufactured under conditions of high sheer stress such as those conditions that occur at commercial production rates. In part, the present invention provides processes for polymer extrusion wherein the resins employed are treated using heat in an atmosphere sufficient to substantially eliminate the tendency to create surface aberrations. The resins can have reduced or substantially eliminated concentrations of low molecular weight components. In some embodiments, both the polymer resins and the extruded polymer products have reduced concentrations of processing aid(s), e.g., the polymer resins and the extruded polymer products are substantially free of processing aid(s).

Method of producing an optically clear polyethylene film

Method for improving the optical properties of thermoplastic films

Biaxial orientation

Blown tube production

THE INVENTION PROVIDES A NOVEL PROCESS FOR PRODUCING, BY THE BLOWN TUBE PROCESS, FILM HAVING IMPROVED AND BALANCED CHARACTERISTICS. THE IMPROVED FILM IS CHARACTERIZED BY CRYSTALLITES DISPERSED THROUGHOUT THE FILM IN AMORPHOUS AREAS AND WHICH IS SUBSTANTIALLY FREE OF CRYSTALLINE FORMATIONS, AS WELL AS HAVING IMPROVED OTHER PROPERTIS. THE PROCESS DISCLOSED EMPLOYS, THE STEPS OF ACTING ON A MOLTEN TUBE FOLLOWING EXTRUSION TO COOL IT TO A TEMPERATURE ABOVE THE CRYSTALLINE FORMATION TEMPERATURE, FOLLOWED BY A ANNEALING STEP AND A SOLIDIFICATION STEP. THE APPARATUS FOR THE PROCESS INCLUDES FIRST COOLING MEANS, IN ANNEALING AND A FURTHER COOLING CHAMBER OR MEANS.

Shape imposition apparatus for the extrusion of tubular thermoplastic film

A method and apparatus are provided for preparing continuous, seamless blown thermoplastic film tubing by extruding a melt of the thermoplastic through an annular orifice into an instantaneous cylindrical shape, inflating the film tube thus formed and cooling such inflated tubing. In the process, the extruded tube while still plastic is passed through an external cooling and shaping means having a multi-perforated air ring shaped in congruance to the desired shape of the inflating tube. A major advantage of this process is that production speeds can be increased while maintaining bubble stability.

Method for the extrusion of tubular thermoplastic film

The present invention relates to a method for the extrusion of tubular thermoplastic film which comprises extruding a melt of thermoplastic through an annular orifice to form a bubble or tube and while the tube is still in a semimolten condition, passing the tube through an extrusion cooling and shaping means having a plurality of multi-perforated air rings shaped in congruance to the desired shape of the inflating tube. This method allows increased production speeds and minimized gauge variation while maintaining bubble stability.

OLEFINIC POLYMER FILM

Process for the manufacture of polyolefin film

A process for the manufacture of polyolefin film, especially high density polyethylene film, is disclosed. In the process molten polyolefin is extruded through an annular die and the tubular molten polyolefin film so formed is withdrawn from the die, expanded, cooled and flattened. The process is controlled so that (a) the ratio of the diameter of the expanded tubular film to the diameter of the annular die is in the range 1.8:1 to 5:1, (b) the frost line formed as the polyolefin cools is at least four feet from the annular die, (c) the completion of the expansion of the tubular film is juxtaposed to, and prior to, the formation of the frost line. The ratio of diameters and the frost line are co-operatively adjusted with the rate at which the film is withdrawn from the annular die and the temperature at which the molten polymer is extruded through the die so that the Elmendorf tear in the machine direction is at least 15 gms./mil. In an embodiment the Elmendorf tear in the machine direction is at least 30 gms./mil. In another embodiment the ratio of the Elmendorf tear in the machine direction to that in the transverse direction is at least 0.3. The film is especially useful in the manufacture of bags, e.g., notion and millinery bags.

Apparatus for the extrusion of tubular thermo-plastic film

The present invention relates to a method and apparatus for the extrusion of tubular thermoplastic film which comprises extruding a melt of thermoplastic through an annular orifice to form a bubble or tube and while the tube is still in a semimolten condition, passing the tube through an extrusion cooling and shaping means having a plurality of multi-perforated air rings shaped in congruance to the desired shape of the inflating tube. This method allows increased production speeds and minimized gauge variation while maintaining bubble stability.

Polyolefine film

1532780 Polyolefine films IMPERIAL CHEMICAL INDUSTRIES Ltd 8 March 1976 [7 March 1975] 9562/75 Heading B5B A film is formed from a copolymer of ethylene with at least one mono-α-olefine comonomer which film has an impact strength and a stiffness modulus which are such that the impact-stiffness function defined by the relationship is at least 750. In a preferred film the stiffness modulus is 200-400 MNm<SP>-2</SP> the tear strength is at least 5 g/micron of film thickness in both machine and transverse directions, the tensile strength at break measured at a straining rate of 500 mm/minute is at least 20 MN/m<SP>2</SP>, the elongation of break measured at a straining rate of 500 mm/min. is 300-1100%, the density is 915-935 kg/m<SP>3</SP>, an annealed density of 918- 940 kg/m<SP>3</SP> the melt flow index measured at 190‹ C. using a weight of 2À16 kg is 0À05-0À7, an apparent viscosity measured at 200‹ C. and a shear rate of 100 sec<SP>-1</SP> of 0À5 x 10<SP>3</SP>-3 x 10<SP>3</SP> NSm<SP>-2</SP> and a viscosity at 200‹ C. and a stress of 10<SP>3</SP>N/m<SP>2</SP> which is at least 2 Ac (1À6 A Î 10<SP>-3</SP>) and not more than 1000 A where A is the apparent viscosity and a sheer rate of 100 sec<SP>-1</SP> and the relationship has a value of at least 18,000. The copolymer is preferably one of ethylene and a comonomer of which at least 50% molar of the mono-α-olefine has 5 or more carbon atoms. The film is formed by extrusion through an annular die followed by inflation.

Process for the preparation of blown film and oriented film

Sisirme yoluyla film meydana getirmeye mahsus usul

Process for the preparation of blown film

Blown film on the basis of polyethylene with a density below 910 kg/m 3 is prepared by extruding the molten polymer having a melt index of at least 2 dg/min at temperatures of the melt at the die gap of at most 160° C., the die gap width being at least 2 mm, blowing the molten polymer to a balloon, cooling, flattening and rolling it up. Films that have been prepared this way have improved mechanical and optical properties and are highly oriented.

Process for Producing Molded Product by Inflation Molding

A process for producing a molded product by inflation molding, which is improved in productivity in molding and can give a molded product not impaired in properties inherent in polyethylene, wherein a molded product is produced by inflation molding using a mixture comprising polyethylene having a density of 900 to 980 (kg/m 3 ) and a polyethylene wax having a density of 890 to 980 (kg/m 3 ) and a number-average molecular weight (Mn), as measured by gel permeation chromatography (GPC), of 500 to 4,000 in terms of polyethylene and satisfying a relationship represented by the following formula (I): B ≦0.0075× K   (I) wherein B is a content (% by weight) of a component having a molecular weight, as measured by gel permeation chromatography, of not less than 20,000 in terms of polyethylene, in the polyethylene wax, and K is a melt viscosity (mPa·s) of the polyethylene wax at 140° C.

Multi-capable elastic laminate process

Disclosed herein is an efficient, in-line process for forming elastic laminates comprising an elastic blown film sheet and one or more fibrous nonwoven webs. The process is capable of making elastic laminates having the properties of stretch and recovery in the machine direction, in the cross machine direction, or in both the machine direction and cross machine direction. The elastic laminates produced may be bilayer or trilayer laminates. Such elastic laminates are highly useful for use in personal care products, protective wear garments, medical care products, mortuary and veterinary products and the like.

Films and film laminates having cushioning cells and processes of making thereof

Disclosed herein is a cushioned blown film including a first blown film layer, a second blown film layer, and a plurality of cushioning cells defined between the first blown film layer and the second film layer. The cushioned blown films may be bonded to a fibrous web to make film nonwoven laminates. Processes for making the cushioned blown film and the film nonwoven laminates are also disclosed. Such laminates are highly useful for use in personal care products, protective wear garments, medical care products, mortuary and veterinary products and the like.

Elastic Composite Having Barrier Properties

An elastic composite that contains an elastic film laminated to one or more nonwoven materials is provided. By selectively controlling the constituents of the composite and the method by which it is formed, the present inventors have discovered that the composite may be resistant to oils and other skin care compositions. More specifically, the elastic film is formed from one or more low density semi-crystalline propylene-based polymers that possess a unique combination of mechanical, elastic, and oil-resistant properties. By using such elastomeric polymers, the resulting elastic film may also be thermally bonded to the nonwoven web material(s) without the need for oil-resistant adhesives. Further, the bonding conditions may be selected so that apertures do not form in the film. In this manner, the resulting composite is impervious to oils or other liquids (e.g., solvents, water, solutions, etc.) and thus acts as a barrier during use.

Films and film laminates having cushioning cells and processes of making thereof

Disclosed herein is a cushioned blown film including a first blown film layer, a second blown film layer, and a plurality of cushioning cells defined between the first blown film layer and the second film layer. The cushioned blown films may be bonded to a fibrous web to make film nonwoven laminates. Processes for making the cushioned blown film and the film nonwoven laminates are also disclosed. Such laminates are highly useful for use in personal care products, protective wear garments, medical care products, mortuary and veterinary products and the like.

Method for controlling a physical property of a tubular blown film

A method for controlling a physical property of a collapsed blown film extruded form a ring-shaped extruder having a plurality of physical property controllers disposed around the extruder includes the following steps. First, an even number of longitudinal sections of the blown film are identified. Next, the physical property profile is measured a first time across the entire width of the collapsed film. Because the longitudinal sections at the ends of the collapsed film overlap themselves, the physical property of these two longitudinal sections is determined by dividing the measured value by two. The film is then rotated, and the physical property profile is measured a second time. Again, the physical property of the longitudinal sections at the ends of the rotated film are determined by dividing their measured value by two. Then the physical properties of the remaining longitudinal sections are determined by subtracting the physical property value of a longitudinal section which has been previously determined from a measured value from either the first or second physical property profile.

Multilayer structure comprising polypropylene

Disclosed is a composition that comprises or is produced from a first ethylene α-olefin copolymer, a modified first ethylene α-olefin copolymer, and a second ethylene α-olefin copolymer or propylene α-olefin copolymer. Also disclosed is a multilayer film or sheet structure containing at least one barrier layer; at least one predominantly propylene-based layer, at least one predominantly ethylene-based layer, or both; and at least one adhesive layer produced from the composition. Further disclosed is a produced for producing a multilayer structure using the composition as adhesive layer.

Multilayer shrink film with polystyrene and polyethylene layers

A multilayer shrink film and methods of making same comprising one or more polyethylenic layers, one or more polystyrenic layer and polystyrene compatibilizing layers situate between each polyethylenic layer and polystyrenic layer wherein the polystyrene compatibilizing layers comprise less than 1% by weight substantially random interpolymer. The multilayer shrink films of the invention are produced using film biaxial orienting means.

Multilayer shrink film with polystyrene and polyethylene layers

A multilayer shrink film and methods of making same comprising one or more polyethylenic layers, one or more polystyrenic layer and polystyrene compatibilizing layers situate between each polyethylenic layer and polystyrenic layer wherein the polystyrene compatibilizing layers comprise less than 1% by weight substantially random interpolymer. The multilayer shrink films of the invention are produced using film biaxial orienting means.

Method of fabricating tubular bodies

This disclosure relates to a method of fabricating tubular bodies having at least one closed end by advancing material along a predetermined path of travel in a predetermined direction, forming the material into a tube during its advancement, placing a closure in-line with the advancement of the tube, and utilizing the motion of the advancing tube to assemble the latter with the closure.

Process for production of moldings by the inflation method

A process for the production of moldings by the inflation method which is improved in the productivity in molding and can give moldings not impaired in the characteristics inherent in polyethylene, wherein moldings are produced by inflation -molding a mixture comprising polyethylene having a density of 900 to 980 (kg/m3) and polyethylene wax having a density of 890 to 980 (kg/m3) and a number-average molecular weight (Mn) of 500 to 4,000 in terms of polyethylene as determined by gel permeation chromatography (GPC) and satisfying the relationship (I): B < 0.0075 × K ... (I) wherein B is the content (% by weight) in the polyethylene wax of components having molecular weights of 20,000 or above in terms of polyethylene as determined by gel permeation chromatography; and K is the melt viscosity (mPa·s) of the polyethylene wax at 140°C.

Backseamed casing and packaged product incorporating same

A heat-shrinkable backseamed casing film comprises a first layer, a second layer, and a third layer, with the first and third layers being outer layers and the second layer being between the first layer and the third layer. The first outer layer serves as an inside casing layer, and comprises polyolefin; the second layer comprises polyester and/or polyamide; the third layer serves as an outside casing layer and comprises polyolefin, polystyrene, and/or polyamide. The second layer has a thickness of at least about 5% of a total thickness of the heat-shrinkable casing film. Alternatively, the first layer comprises polyolefin and has a surface energy level of less than about 34 dynes/cm; the second layer comprises a polyamide having a melting point of at least 300° F.; and the third layer comprises polyolefin, polystyrene and/or polyamide. A package comprises a cooked meat product within the backseamed casing. The second layer of the casing film prevents or reduces necking down on the forming shoe during backseaming. The backseamed casing is especially useful for cook-in applications.

Polyethylene useful for producing film and molded articles in a process which uses solid state stretching

Method of producing film having improved shrink energy

[UNK]

Process and apparatus for the manufacture of thermoplastic film

Production of biaxially stretch oriented polypropylene film

Method and apparatus for making oriented tubular film

Successive portions of an extruded, advancing tubular film of molten thermoplastic polymeric material are cooled only to within a required orientation temperature range and, while within this temperature range, such portions are stretched to orient the molecules thereof, after which the successive portions are cooled to a temperature below the orientation temperature range while in a stretched condition.

Method and apparatus for extruding creaseless thin walled tubes

Apparatus for preparing seamless, creaseless, pliable, thin-walled tubes comprising means to extrude a moving continuous tube of polymeric film material from a die, means to radially stretch the continuous tube as it emerges from the die, means to longitudinally stretch the tube, and means to sever the tube while the tube is in motion to form tube segments while maintaining the tube substantially free of creases. This apparatus may be employed in a process to prepare seamless, creaseless, pliable, thin-walled tubes.

Process and apparatus for the production of an extruded, stretched, seamless tube

A seamless parison extruded from an extruder via an annular die, passes through a calibrator and coaxially surrounds a probe pipe, which is made to extend through the annular die beyond the calibrator. On the probe pipe there is mounted a sealing element. Ahead of the sealing element, a pressure equal to atmospheric pressure prevails inside the tube and, after the sealing element, a higher pressure than atmospheric pressure prevails. The pressurization is achieved in that a second belt take-off folds together the tube, so that the compressed air fed in through the probe pipe causes a higher tube internal pressure, since the sealing element bears in a sealing manner against the inside of the tube. As a result, a substantial pressure separation is effected at the point of the sealing element. In a first heating chamber, the tube is heated to the stretching temperature and is transported by a second belt take-off at a stretching speed, increased relative to the take-off speed of the first belt take-off, to a second heating chamber, in which a heat setting of the tube takes place. From the heating chamber, the tube is transported onward at the same, greater or lower speed than the stretching speed by a third belt take-off and wound up by a deflection roller onto a wind-up roller.

Polyethylene films and processes for making them

Provided are films such as high-stalk films made from polyethylene polymers, and methods for making these films. Such films preferably have at least one of the following properties: (a) MD 1% Secant Modulus of less than 400 MPa, (b) Elmendorf Tear MD of at least 100 g/mil, (c) Dart drop of at least 200 g/mil, (d) puncture resistance break energy of at least 120 mJ/μιη, (e) TD shrink at 150°C of at least 40% or at least 30% at 120°C; and (f) haze value of less than 40%.

Polymeric films and methods to manufacture same

Polymeric films are provided. The films comprise an ethylene-derived resin that has a density of about 0.905 to about 0.945 g/cm3, a compositional distribution breadth index (CDBI) of at least 50%, a melt index (MI) of about 0.1 to about 5.0 g/10 min and a branching index (g') of greater than about 0.7. The film may further comprise a propylene-derived resin having a density of about 0.86 to about 0.91 g/cm3. The films have excellent mechanical and optical properties and double-bubble extrusion processability.