FOAM MOULDING POLY(METH)ACRYLIMIDE PARTICLES IN CLOSED MOULDS FOR PRODUCING RIGID FOAM CORES

The invention relates to a process for the production of mould-foamed poly(meth)acrylimide (P(M)I) cores, in particular of polymethacrylimide (PMI) cores, which can be used by way of example in automobile construction or aircraft construction. A feature of this process is that polymer granules or polymer powder are charged to a compression mould where they are foamed. A particular feature of the process is that said two-shell compression mould has, respectively on both sides, a cavity that conforms to the shape and which serves for both the heating and the cooling of the granules and, respectively, of the rigid foam core produced therefrom. 1: A process for the production of a rigid poly(meth)acrylimide foam core , the process comprising:charging poly(meth)acrylimide particles to a mould comprising two shells,heating a space within the mould and simultaneously foaming the particles,cooling the space within the mould thereby forming a rigid poly(meth)acrylimide foam core,opening the mould and removing the rigid poly(meth)acrylimide foam core,wherein each shell of the mould comprises a cavity which conforms to an internal shape of the mould and which covers the area of the space within the mould, andwherein a heating liquid is passed through each cavity during the heating and a cooling liquid is passed through each cavity during the cooling.2: The process according to claim 1 , wherein the cavities conform to a shape of the space within the mould and that a thickness of the cavities between a side that conforms to the internal shape of the mould and a side that conforms to the shape of the space within the mould is from 2 to 20 cm.3: The process according to claim 1 , whereinthe heating liquid and the cooling liquid are the same type of liquid, andthe heating liquid and the cooling liquid are passed from two different reservoirs with different temperatures into each cavity, in a manner such that the temperature of the heating liquid is from 180 to 250° C. and the ...

PESU PARTICLE FOAMS FOR APPLICATIONS IN AVIATION INTERIORS

Polymer foams based on polyethersulfone (PESU) fulfil the legal specifications demanded by the aviation industry for aircraft interiors. Specifically the demands on fire characteristics, stability to media and mechanical properties constitute a great challenge here. According to the related art, suitable polymer foams are produced as semifinished products. Reprocessing to give shaped articles is uneconomic in terms of time and material exploitation, for example by virtue of large amounts of cutting waste. The problem is solved by the material which is suitable in principle can be processed to give particle foam mouldings. These mouldings can be produced without reprocessing in short cycle times and hence economically. Furthermore, this gives rise to new means of functional integration, for example by direct incorporation of inserts etc. in the foam, and with regard to freedom in terms of design. 1. A polyethersulfone (PESU) particle foam , comprising:foamed PESU, which has a glass transition temperature between 180 and 215° C., andwherein a mean cell diameter of the PESU particle foam is less than 1000 μm.2. The PESU particle foam according to claim 1 , obtained from a composition comprising:80% to 99.5% by weight of PESU,0.5% to 10% by weight of a blowing agent, and0% to 10% by weight of additives.3. The PESU particle foam according to claim 2 , wherein the additives are flame retardants claim 2 , plasticizers claim 2 , pigments claim 2 , UV stabilizers claim 2 , nucleating agents claim 2 , impact modifiers claim 2 , adhesion promoters claim 2 , rheology modifiers claim 2 , chain extenders claim 2 , fibres claim 2 , nanoparticles claim 2 , or combinations thereof.4. The PESU particle foam according to claim 2 , wherein the blowing agent is an alcohol claim 2 , a ketone claim 2 , an alkane claim 2 , an alkene claim 2 , CO claim 2 , N claim 2 , water claim 2 , an ether claim 2 , an aldehyde claim 2 , chemical blowing agents or mixtures of two or more thereof.5. The ...

PEI particle foams for applications in aircraft interiors

Polymer foams based on polyetherimides (PEIs) fulfill the legal specifications demanded by the aviation industry for aircraft interiors. Specifically, the demands on fire characteristics, stability to media and mechanical properties constitute a great challenge here. According to related art, suitable polymer foams are produced as semi-finished products. Reprocessing to give shaped articles is uneconomic in terms of time and material exploitation, for example by virtue of large amounts of cutting waste. The material is suitable in principle and can be processed to give particle foam mouldings. These mouldings can be produced without reprocessing in short cycle times and, hence, economically. Furthermore, this gives rise to new means of functional integration, for example by direct incorporation of inserts etc. in the foam, and with regard to freedom in terms of design. 1. A polyetherimide (PEI) particle foam , wherein the PEI particle foam has a glass transition temperature between 180 and 215° C. , and wherein a mean cell diameter of the PEI particle foam is less than 2 mm.2. The PEI particle foam according to claim 1 , wherein the PEI particle foam has been obtained from a composition consisting of 80% to 99.5% by weight of PEI claim 1 , 0.5% to 10% by weight of a blowing agent claim 1 , and 0% to 10% by weight of additives.3. The PEI particle foam according to claim 2 , wherein the additives are present in the composition and at least one selected from the group consisting of flame retardants claim 2 , plasticizers claim 2 , pigments claim 2 , UV stabilizers claim 2 , nucleating agents claim 2 , impact modifiers claim 2 , adhesion promoters claim 2 , theology modifiers claim 2 , chain extenders claim 2 , fibres claim 2 , nanoparticles claim 2 , and a polymer component.4. The PEI particle foam according to claim 2 , wherein the blowing agent is selected from the group consisting of an alcohol claim 2 , a ketone claim 2 , an alkane claim 2 , an alkene claim 2 , CO ...

PRODUCTION OF COMPLEX HOLLOW FOAM OR SANDWICH STRUCTURES BY MEANS OF A MOLD CORE

The invention relates to a process for producing complex, mould-foamed rigid foam materials, more particularly of poly(meth)acrylimide (P(M)I) cores, preferably of polymethacrylimide (PMI) cores, which may be employed, for example, in carmaking or aircraft construction. A feature of the process is that through use of a particulate core during foam, it is possible to achieve an additional weight saving relative to foam materials or sandwich materials of the prior art. 1. A process for producing at least one complex rigid foam core , the method comprising:producing a filling core, filled with particles and consisting of a foil,inserting the filling core into a mold and then closing the mold,introducing pre-foamed or unfoamed matrix particles into a cavity between the filling core and an inside wall of the mold,foaming the matrix particles, opening the mold, and withdrawing a rigid foam core,optionally opening the foil at an accessible former contact region from the inserting, andwithdrawing the particles from the rigid foam core.2. The process according to claim 1 ,wherein the inserting comprises inserting the filling core such that the filling core contacts between 0.5 and 10 area per cent of the inside wall of the mold.3. The process according to claim 1 ,wherein the inserting comprises inserting the filling core such that the filling core after the foaming is entirely surrounded by foam, andin the optionally opening, the foam is partly drilled open or cut open for withdrawal of the particles in the withdrawing.4. The process according to claim 1 ,wherein in the inserting, the filling core is inserted such that the filling core contacts between 0.5 and 10 area per cent of the inside wall of the mold, which is sealed with a readily removable means, andthe readily removable means is removed in the optionally opening.5. The process according to claim 1 ,wherein the particles comprise sand, polymer particles which are solid and stable at a foaming temperature, metal ...

Prefoaming of poly(meth)acrylimide particles for subsequent foam moulding in closed tools

The invention relates to a process for the production of prefoamed poly(meth)acrylimide (P(M)I) particles which can be further processed to give foam mouldings or composites. A feature of this process is that a polymer granulate is first heated and thus prefoamed in an apparatus by means of IR radiation of a wavelength suitable for this purpose. Said granulate can be further processed in subsequent steps, e.g. in a press mould with foaming to give a moulding or a composite workpiece with foam core.

Foam moulding poly(meth)acrylimide particles in closed moulds for producing rigid foam cores

The invention relates to a method for producing foam-moulded poly(meth)acrylimide (P(M)I), in particular polymethacrylimide (PMI) cores, which can be used for example in automobile or aircraft construction. The method is distinguished here by the fact that polymer pellets or powder is/are filled into a pressing mould, where it undergoes foaming. In particular, the method is distinguished by the fact that this two-shell pressing mould has on each of both sides a contour-following cavity, which serves both for the heating and cooling of the pellets, or of the rigid foam core formed therefrom.

Prefoaming of poly(meth)acrylimide particles for subsequent foam moulding in closed tools

The invention relates to a method for producing prefoamed poly(meth)acrylimide (PMI) particles, which can be further processed into foam-moulded parts or composites. The method is thereby characterized in that a polymer granulate is initially heated in a device by means of infrared radiation at a wavelength suitable for this purpose and is thus prefoamed. In subsequent method steps, e.g. in a pressing tool, this granulate can be further processed, by foaming, into a moulded part or a composite workpiece with a foam core.

Prefoaming of poly(meth)acrylimide particles for subsequent foam moulding in closed tools

The invention relates to a method for producing prefoamed poly(meth)acrylimide (PMI) particles, which can be further processed into foam-moulded parts or composites. The method is thereby characterized in that a polymer granulate is initially heated in a device by means of infrared radiation at a wavelength suitable for this purpose and is thus prefoamed. In subsequent method steps, e.g. in a pressing tool, this granulate can be further processed, by foaming, into a moulded part or a composite workpiece with a foam core.

Prefoaming of poly(meth)acrylimide particles for subsequent foam moulding in closed tools

Pesu particle foams for applications in aviation interiors

Polyethersulfone (PESU) based polymer foams comply with the statutory requirements on interiors in aviation demanded by the aviation industry. The requirements concerning fire behaviour, resistance to media and mechanical strength in particular represent significant challenges. Suitable polymer foams are produced as semi-finished products in the prior art. Post-processing into shaped parts is uneconomic in terms of time and the use of material, because of the large volumes of cutting waste, for instance. The invention solves this problem in that the material that is, in principle, suitable can be processed into particle-foam shaped parts. Said shaped parts can be produced without post-processing in short cycle times and hence economically. Furthermore, new options arise for function integration, such as the direct foam moulding of inserts, etc., and in respect of design freedom.

Pei particle foams for applications in aviation interiors

Polyetherimide (PEI)-based polymer foams comply with the statutory requirements on interiors in aviation demanded by the aviation industry. The requirements concerning fire behaviour, resistance to media and mechanical strength in particular represent significant challenges. Suitable polymer foams are produced as semi-finished products in the prior art. Post-processing into shaped parts is uneconomic in terms of time and the use of material, because of the large volumes of cutting waste, for instance. The invention solves this problem in that the material that is, in principle, suitable can be processed into particle-foam shaped parts. Said shaped parts can be produced without post-processing in short cycle times and hence economically. Furthermore, new options arise for function integration, such as the direct foam moulding of inserts, etc., and in respect of design freedom.

Prefoaming of poly(meth) acrylimide particles for subsequent foam moulding enclosed moulds

本發明係關於一種可經進一步加工而獲得發泡體模塑物或複合物之經預發泡的聚(甲基)丙烯醯亞胺(P(M)I)粒子的製造方法。此方法之特徵是：先將聚合物顆粒在一設備中利用波長適合此目的之IR輻射予以加熱並因此預發泡。該顆粒可在隨後之步驟中(例如在壓模中)被加工並發泡而獲得模塑物或具有發泡體核心之複合工件。

Production of complex hollow foam or sandwich structures by means of a mold core

The invention relates to a method for producing complex foam-molded rigid foam materials, in particular poly(meth)acrylimide (P(M)I) cores, preferably polymethacrylimide (PMI) cores, which can be used in automotive or aircraft construction, for example. The method is characterized in that the use of a particulate core during the foaming process allows for an additional weight reduction in comparison with prior art foam materials or sandwich materials.

Pei particle foams with defined residual blowing agent content

Polymer foams based on polyetherimides (PEI) meet the legal requirements of the aerospace industry for both the interior and exterior of aircraft.

Production of high temperature polymer based pellets by underwater pelletization at elevated water temperature to produce (rigid) bead foams

A process can be used for producing (rigid) particle foams from polymer compositions containing at least one polymer having a glass transition temperature according to ISO 11357-2 of at least 180° C. with an underwater pelletization system.

PEI particle foams for applications in aircraft interiors

Polymer foams based on polyetherimides (PEIs) fulfill the legal specifications demanded by the aviation industry for aircraft interiors. Specifically, the demands on fire characteristics, stability to media and mechanical properties constitute a great challenge here. According to related art, suitable polymer foams are produced as semi-finished products. Reprocessing to give shaped articles is uneconomic in terms of time and material exploitation, for example by virtue of large amounts of cutting waste. The material is suitable in principle and can be processed to give particle foam mouldings. These mouldings can be produced without reprocessing in short cycle times and, hence, economically. Furthermore, this gives rise to new means of functional integration, for example by direct incorporation of inserts etc. in the foam, and with regard to freedom in terms of design.

Wasserunterstütztes Vorschäumen von treibmittelbeladenen Polymergranulaten

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Partikelschaum-Formteils auf Basis von thermoplastischem Basismaterial mit einer Glasübergangstemperatur von wenigstens 130 °C, sowie ein Verfahren zur Herstellung von treibmittelbeladenen Polymergranulaten, die zur Herstellung eines Partikelschaum-Formteils geeignet sind.

Pei particle foams with defined residual blowing agent content

Polymer foams based on polyetherimides (PEI) meet the legal requirements of the aerospace industry for both the interior and exterior of aircraft.

PEI particle foams for applications in aviation interiors

Polyetherimide (PEI)-based polymer foams comply with the statutory requirements on interiors in aviation demanded by the aviation industry. The requirements concerning fire behaviour, resistance to media and mechanical strength in particular represent significant challenges. Suitable polymer foams are produced as semi-finished products in the prior art. Post-processing into shaped parts is uneconomic in terms of time and the use of material, because of the large volumes of cutting waste, for instance. The invention solves this problem in that the material that is, in principle, suitable can be processed into particle-foam shaped parts. Said shaped parts can be produced without post-processing in short cycle times and hence economically. Furthermore, new options arise for function integration, such as the direct foam moulding of inserts, etc., and in respect of design freedom.

Herstellung von granulaten auf basis von hochtemperatur-polymeren mittels unterwassergranulierung bei erhöhter wassertemperatur zur herstellung von partikel(hart)schaumstoffen

Verfahren zur Herstellung von Partikel(Hart) schaumstoffen mittels einer Unterwassergranulierung aus einer Polymerisatzusammensetzung mit mindestens einem Polymer, welches eine Glasübergangstemperatur nach ISO 11357-2 (Veröffentlichung: 2014-07) von mindestens 180°C aufweist, wobei die Polymerschmelze des Extruders in einen unter Druck stehenden ersten Wasserkreislauf gefördert wird, wobei der Druck im Bereich von 0,2 bis 30 bar und die Wassertemperatur im Wasserkreislauf im Bereich von 105°C bis 180°C liegt, granuliert wird, sowie die Verwendung dieser Partikel(Hart)schaumstoffe.

Process for producing a single-material particle-foam component

The present invention relates to a process for producing single-material particle-foam components based on thermoplastic base polymers, characterized in that a foamable base polymer is processed with a modified base polymer into a single-material particle-foam component.

Method of automated processing of high-temperature-stable, closed-pore, rigid hard foams

The present invention discloses a method of automated production of lightweight components. The method has the steps of providing a high-temperature-stable, closed-pore, rigid hard foam, of providing a fibre reinforcement material, of automated applying of the fibre reinforcement material to the high-temperature-stable, closed-pore, rigid hard foam. The high-temperature-stable, closed-pore rigid hard foam has a Tg of ≥ 100°C, preferably ≥ 180°C. The lightweight components are preferably aviation and aerospace components. In addition, the invention includes a production line for performance of an automated production method for lightweight components.

Production of high temperature polymer based pellets by underwater pelletization at elevated water temperature to produce (rigid) bead foams

Process for producing (rigid) bead foams by a process of underwater pelletization from a polymer composition featuring at least one polymer which has a glass transition temperature according to ISO 11357-2 (publication: 2014-07) of at least 180°C, wherein the extruder polymer melt is conveyed in a pressurized first water circuit, wherein the pressure is in the range from 0.2 to 30 bar and the water temperature in the water circuit is in the range from 105°C to 180°C, and the use of these (rigid) bead foams.

Herstellung von granulaten auf basis von hochtemperatur-polymeren mittels unterwassergranulierung bei erhöhter wassertemperatur

PEI or PEI-PEEK particle foams for applications in lightweight construction

Polymer foams based on polyetherimides (PEI) or blends of polyetherimides and polyether ether ketone (PEEK) meet the legal requirements demanded by the aviation industry for aircraft interiors and for aircraft exteriors too.

Pei particle foams with defined residual blowing agent content

Polymer foams based on polyetherimides (PEI) meet the legal requirements of the aerospace industry for both the interior and exterior of aircraft.

Pei or pei-peek particle foams for applications in lightweight construction

Polymer foams based on polyetherimides (PEI) or blends of polyetherimides and polyether ether ketone (PEEK) meet the legal requirements demanded by the aviation industry for aircraft interiors and for aircraft exteriors too.

Pei or pei-peek particle foams for applications in lightweight construction

Espumas particuladas de pei ou pei-peek para aplicações em construção leve

ESPUMAS PARTICULADAS DE PEI OU PEI-PEEK PARA APLICAÇÕES EM CONSTRUÇÃO LEVE. Espumas de polímero à base de polieterimidas (PEI) ou misturas de polieterimidas e poliéter éter cetona (PEEK) que atendem aos requisitos legais exigidos pela indústria da aviação para interiores de aeronaves e também para exteriores de aeronaves.

PEI or PEI-PEEK particle foams for applications in lightweight construction

Polymer foams based on polyetherimides (PEI) or blends of polyetherimides and polyether ether ketone (PEEK) meet the legal requirements demanded by the aviation industry for aircraft interiors and for aircraft exteriors too.

PEI particle foams for applications in aviation interiors

Polyetherimide (PEI)-based polymer foams comply with the statutory requirements on interiors in aviation demanded by the aviation industry. The requirements concerning fire behaviour, resistance to media and mechanical strength in particular represent significant challenges. Suitable polymer foams are produced as semi-finished products in the prior art. Post-processing into shaped parts is uneconomic in terms of time and the use of material, because of the large volumes of cutting waste, for instance. The invention solves this problem in that the material that is, in principle, suitable can be processed into particle-foam shaped parts. Said shaped parts can be produced without post-processing in short cycle times and hence economically. Furthermore, new options arise for function integration, such as the direct foam moulding of inserts, etc., and in respect of design freedom.