Method for preparing grinding silk

The invention relates to a method for preparing a super-tough super-strong specific grinding silk. In the invention, the performance of a polyamide resin slice is adjusted through adjusting auxiliary materials, such as antioxidant, a flexibilizer and/or a reinforcing agent and the like, artificial diamond grinding particles subjected to coupling agent treatment is added to produce the grinding silk with excellent performance. A contact phase of the artificial diamond grinding particles subjected to the coupling agent treatment and the polyamide resin slice is solid-liquid blending by means of segment charging, so as to reduce the abrasion of a building-block type single screw rod extruder by using the artificial diamond grinding particles, and feed volumes are respectively regulated to obtain a plurality of grinding silks having the proportion content of grinding materials, so that the product meets the requirement on various trenchant use environment. The product developed by the process ...

PS/clay nano-composite material and preparing method thereof

Method for characterizing surface finishing status of inorganic material with mesoporous

The invention belongs to a characterization method, particularly relates to a characterization of the mesopore reservation condition after the surface of an inorganic material with mesopores is modified. An inorganic material with mesopores free of surface modification treatment and an inorganic material with mesopores after surface modification treatment are marked fluorescently, and the fluorescence strengths are compared under same exposure intensity, thus judging the modification effect of the surface modification method for the inorganic material with mesopores, in particular to the modification effect of the high polymer surface modifier. When being used, the characterization method can judge the surface modification efficiency degree of the high polymer surface modifier on the inorganic material with mesopores quickly. The characterization method is used as a test method and is convenient and intuitive.

Method for manufacturing abrasive wires

The invention relates to a method for manufacturing abrasive wires, which comprises the following steps: arranging two feeding inlets of a screw extruder; using nylon chips as main materials; feedingthe nylon chips and the abrasive respectively into the screw extruder through the two feeding inlets of the screw extruder for mixing the materials; controlling the preparation of abrasive wires through the efflux velocity of the materials; and in the production process, pre-melting part or all of the nylon chips and then mixing with the abrasive, extruding, drawing wires and continuously producing to obtain the abrasive wires. Because the nylon chips and the abrasive respectively enter different segments of the screw extruder, the invention can better control the mixing proportion of the materials to continuously produce the abrasive wires with uniform thickness. Because the abrasive is wrapped by the molten mass of nylon, the impact on a screw and a screw sleeve can be reduced, thereby reducing ...

PS/clay nanometer composite material and method for preparing same

The present invention relates to a polystyrene/clay nanometer composite material and its preparation method. It is characterized by that the montmorillonite clay is undergone the process of intercalation treatment, and dispersed in styrene monomer, then said invention adopts the processes of emulsion polymerization, suspension polymerization, solution polymerization and bulk polymerization so as to obtain the invented polystyrene/clay nanometer composite material, the clay is uniformly dispersed in said composite material, and completely stripped.

Polyamide inorganic nano composite material and preparation method thereof

The invention belongs to the field of polyamide polymer materials, in particular to a polyamide inorganic nano composite material and a preparation method thereof. 0.002 to 0.04 gram of hypophosphite and 0.0005 to 1 gram of inorganic nano material are added in the aqueous solution of amidocarboxylate or the aqueous solution of salt prepared by the reaction of dicarboxylic acid and diamine in the mole ratio of 1:1 in water; and after concentration, prepolymerization, depressurization and normal-pressure polymerization, 100 grams of polyamide inorganic nano composite material is obtained. The polyamide inorganic nano composite material has the advantages of high whiteness and stable color, and not only is the forming period of polyamide shortened, but also the mechanical properties of the polyamide material are effectively maintained.

Method for producing polypropylene concrete reinforced fiber

Nanometer montmorillonoid-containing composite material and its prepn.

The organic montmorillonoid prepared by making natural montmorillonoid undergo the process of cation exchange reaction is uniformly dispersed in polyether polyol, and their dispersion system is reacted with diisocyanate, proper quantity of chain-extender and catalyst so as to obtain a nano composite-material containing montmorillonoid. Its mechanical properties are completely raised, and its preparation process is simple.

抗菌弹性聚氨酯纳米复合材料及其制备方法

An antibacterial elastic nano-class polyurethane composition is prepared through mixing antibacterial agent, SiO2 or ZnO nanoparticles or laminated nano material, and polyether polyol, vacuumizing, dewatering, degassing, adding assistants to obtain nano material B, preparing polyurethane prepolymer as B, proportional mixing A with B, adding catalyst, stirring and solidifying. Its advantages are outstanding antibacterial performance and high mechanical performance.

Polyamide inorganic nano composite material and preparation method thereof

The invention belongs to the field of polyamide polymer materials, in particular to a polyamide inorganic nano composite material and a preparation method thereof. 0.002 to 0.04 gram of hypophosphite and 0.0005 to 1 gram of inorganic nano material are added in the aqueous solution of amidocarboxylate or the aqueous solution of salt prepared by the reaction of dicarboxylic acid and diamine in the mole ratio of 1:1 in water; and after concentration, prepolymerization, depressurization and normal-pressure polymerization, 100 grams of polyamide inorganic nano composite material is obtained. The polyamide inorganic nano composite material has the advantages of high whiteness and stable color, and not only is the forming period of polyamide shortened, but also the mechanical properties of the polyamide material are effectively maintained.

Composite material with reinforced fiberglass from waste printed circuit board and preparation thereof

The invention relates to a composite material intensified by fiber glass of waste printed circuit boards and the preparation method. Fiber glass pieces separated from waste printed circuit boards are cut into fiber glass blocks with a size between 1 to 4cm, the obtained fiber glass blocks are blended with a modifier and then mixed with polymeric matrix material, added with an antioxidant and molten and blended at the same time, and thus the composite material intensified by fiber glass of waste printed circuit boards is obtained; wherein, in the composite material, the weight percentages of all the components are respectively 4 to 45 percent of fiber glass blocks, 0 to 2 percent of modifier, 50 to 95 percent of polymeric matrix material and 0.1 to 5 percent of antioxidant. The composite material of the invention effectively reduces the manufacturing cost of materials, can wholly and effectively utilize fiber glass nonmetal material of waste printed circuit boards, and has the advantages ...

Composite material with reinforced fiberglass from waste printed circuit board and preparation thereof

The invention relates to a composite material intensified by fiber glass of waste printed circuit boards and the preparation method. Fiber glass pieces separated from waste printed circuit boards are cut into fiber glass blocks with a size between 1 to 4cm, the obtained fiber glass blocks are blended with a modifier and then mixed with polymeric matrix material, added with an antioxidant and molten and blended at the same time, and thus the composite material intensified by fiber glass of waste printed circuit boards is obtained; wherein, in the composite material, the weight percentages of all the components are respectively 4 to 45 percent of fiber glass blocks, 0 to 2 percent of modifier, 50 to 95 percent of polymeric matrix material and 0.1 to 5 percent of antioxidant. The composite material of the invention effectively reduces the manufacturing cost of materials, can wholly and effectively utilize fiber glass nonmetal material of waste printed circuit boards, and has the advantages ...

Method for treating and recovering wastewater generated during sharpening polybutylene terephthalate (PBT) brush threads

The invention relates to a method for treating and recovering wastewater generated during sharpening polybutylene terephthalate (PBT) brush threads. The method comprises the following steps: carrying out activated carbon treatment on wastewater and then filtering to obtain clear wastewater; adding diluted hydrochloric acid into the clear wastewater to regulate the pH to be 3-3.5 so that para-phthalic sodium in the clear wastewater is converted to terephthalic acid white flocculent precipitate, filtering, washing and stoving to obtain terephthalic acid with the purity above 99.5%; then utilizing NaOH aqueous solution to neutralize the filtered wastewater until the pH is 7, and utilizing the salting-out principle and the re-steaming technology to layer 1,4-butanediol and generated NaCl solution, thus obtaining 1,4-butanediol with the purity above 99.7%; carrying out exchange desalination on the NaCl solution so as to be used as washing water for sharpening of the PBT brush threads. By adopting ...

Nonwoven fabric for air wetting purification and preparation method thereof

The invention relates to a nonwoven fabric for air wetting purification, wherein the nonwoven fabric for air wetting purification has a liquid-absorption height of 100-200mm and a wetting tensile strength of 3.0-8.0KN/m; preferably, the liquid-absorption height is 120-180mm and the wetting tensile strength is 5.0-8.0KN/m; and optimally, the liquid-absorption height is 130-160mm and the wetting tensile strength is 5.5-8.0KN/m. A method for preparing the nonwoven fabric for air wetting purification comprises the following steps: mixing water-absorption resin with antibacterial agent as a working solution; coating the working solution onto the nonwoven fabric by using a soaking or coating method; and drying and baking the nonwoven fabric, so as to acquire the nonwoven fabric.

Liquid crystal state PS/clay nanometer composite material and method for preparing same

The ingredients of polystyrene/clay nanometer composite material, antioxidant and antioxidant aid as raw material are injection-moulded at 190-230 deg.c so as to obtain the liquid crystalline state polystyrene/clay nanometer composite material.

Liquid crystal state PS/clay nano-composite material and method for preparing same

Method for characterizing surface finishing status of inorganic material with mesoporous

The invention belongs to a characterization method, particularly relates to a characterization of the mesopore reservation condition after the surface of an inorganic material with mesopores is modified. An inorganic material with mesopores free of surface modification treatment and an inorganic material with mesopores after surface modification treatment are marked fluorescently, and the fluorescence strengths are compared under same exposure intensity, thus judging the modification effect of the surface modification method for the inorganic material with mesopores, in particular to the modification effect of the high polymer surface modifier. When being used, the characterization method can judge the surface modification efficiency degree of the high polymer surface modifier on the inorganic material with mesopores quickly. The characterization method is used as a test method and is convenient and intuitive.

Automatic cleaning method of pointed bristles of toothbrush

The invention relates to an automatic cleaning method of pointed brittles, in particular to an automatic cleaning method of pointed brittles of a toothbrush for processing both ends of each brittle into points by a strong alkaline solution, which comprises the process steps of soaking, cleaning, spraying, neutralizing, spraying, lubricating and drying the pointed bristles of the toothbrush. The invention finally obtains the high-quality pointed bristles of the toothbrush by mainly cleaning and drying the pointed bristles of the toothbrush. The invention can avoid rubbing the pointed bristles to reduce bent bristles of the pointed bristles of the toothbrush, and can improve the product quality of the pointed bristles of the toothbrush. Manual operation is reduced by an automatic delivery device, and the pointed bristles of the toothbrush are cleaned in warm water soaking environment by ultrasonic cleaning for many times. The invention can improve the production efficiency and achieve the ...

Method for recycling copper from waste circuit board

The invention belongs to recycling of waste printed circuit board, in particular to recycling method of copper metal including copper foil and copper wire from the waste printed circuit board. Firstly a copper metal with the surface of polymer film material, which is separated from the waste printed circuit board, is soaked in a swelling agent, and the copper metal matrix material and the polymer film material on the surface are separated by providing the good swelling environment and controlling the temperature change; The polymer film material and the copper metal are recycled in classification by utilizing the difference of specific gravity between the copper metal and the polymer film material. The method of the invention can carry out the effective and complete separation of the copper metal and the polymer film material on surface of the waste printed circuit board and the swelling agent can be repeatedly used; The recycling method of copper metal of the invention has the advantages ...

Special material for nano polypropylene tubing material

The invention is a special material of nano polypropylene tubing, composed of copolymerization polypropylene, organic nano clay, nano silver-ion antimicrobial and lubricant dispersant. It has very high heat-resistant performance and wonderful mechanical performance, high-level heat stability and good extraction-resistant performance.

Method for separating fiberglass cloth and sheet metal in waste printed circuit board

The invention belongs to the recycling of a waste printed circuit board, in particular relates to a method for separating fiberglass cloth from a metal layer (such as a copper foil, a copper wire, etc.) in the waste printed circuit board. According to different structures and requirements of the waste printed circuit board, the appropriate thermal medium is chosen; at the room temperature of 250 DEG C, the waste printed circuit board is arranged in thermal medium so that the bonding force between the glass fiber cloth and the metal layer is reduced; when bonding force disappears, according tothe differences of heat transmission coefficients between the glass fiber cloth and the metal layer, the glass fiber cloth is separated from the metal layer in the waste printed circuit board arranged in the thermal medium through mechanical or manual manners, so as to recycle the glass fiber cloth and the metal layer. The method provided by the invention can effectively separate the glass fiber cloth ...

Method for treating surface of attapulgite

The invention belongs to inorganic/organic composite material, and in particular relates to a method for treating the surface of attapulgite (ATP). The method comprises the following steps of dispersing and compounding the attapulgite and an oxidized polyethylene emulsion under ultrasonic conditions, obtaining a compound after dispersing the attapulgite in the oxidized polyethylene emulsion, settling the compound directly or after adding in an sedimentation agent, applying repeated shearing action to the compound on a device with strong mechanical shearing action force and then obtaining the attapulgite which can be applied to compound polymers and is treated via oxidized polyethylene. The attapulgite treated through the method can be directly used for preparing polymer nanometer composite materials with high performance.

Preparation of stable suspension of nano pearls powder

A stabilized suspension of pearl nanoparticles is prepared from pearl through pulverizing by 300-500 meshes, adding deionized water, and stabilizer, and pulverizing in high-pressure homogenizing machine.

Preparation of nano pearls powder

A pearl nanoparticle is prepared from pearl through pulverizing by 300-500 meshes, adding deionized water to obtain suspension, and pulverizing in high-pressure homogenizing machine.

Automatic cleaning method of pointed bristles of toothbrush

The invention relates to an automatic cleaning method of pointed brittles, in particular to an automatic cleaning method of pointed brittles of a toothbrush for processing both ends of each brittle into points by a strong alkaline solution, which comprises the process steps of soaking, cleaning, spraying, neutralizing, spraying, lubricating and drying the pointed bristles of the toothbrush. The invention finally obtains the high-quality pointed bristles of the toothbrush by mainly cleaning and drying the pointed bristles of the toothbrush. The invention can avoid rubbing the pointed bristles to reduce bent bristles of the pointed bristles of the toothbrush, and can improve the product quality of the pointed bristles of the toothbrush. Manual operation is reduced by an automatic delivery device, and the pointed bristles of the toothbrush are cleaned in warm water soaking environment by ultrasonic cleaning for many times. The invention can improve the production efficiency and achieve the ...

高弹性聚氨酯纳米复合材料及其制备方法

The present invention discloses one kind of composite nano high-elasticity polyurethane material and its preparation process. The composite nano high-elasticity polyurethane material is prepared through mixing component A and component B in the ratio of 1/6 to 1/3, adding catalyst through stirring and curing. The component A is conventional polyurethane prepolymer; and the component B is prepared through mixing SiO2, ZnO and other granular nano material, laminated nano material hydrotalcite and polyether polyol, vacuum pumping to deair and dewater and adding other assistants. The compositenano material has outstanding high elasticity and raised comprehensive mechanical performance.

仿鬃刷丝及制造方法

The present invention relates to bristle product with sprayed abrasive, and is one kind of mane imitating bristle and its making process. The bristle is made of PBT and/or PET in polyester and has one layer of abrasive selected from SiC and Al2O3 of granularity of 60-800 mesh. The making process of the present invention includes heating and extruding polyester in an extruder, cooling, extending, heating spraying abrasive, extending and recovering. The key point of the present invention is to spray abrasive from different directions before the bristle is cooled. The bristle is used in producing brush, and compared with common paint brushes, the brush with the bristle has 7-15 % more paint adsorbing amount, more homogeneously distributed paint, 10 % higher rebound elasticity and 2 times longer life.

Hydrophilic nano montmorillonoid and its prepn

Preparation of water soluble pearl liquid

A water-soluble pearl liquid is prepared from pearl through preparing the suspension of pearl powder, acidolyzing, high-pressure stabilizing, and centrifugal filtering.

Corner-free rubber shock absorber for precision instrument

The invention discloses a corner-free rubber shock absorber for a precision instrument. The rubber shock absorber is characterized by consisting of an upper steel piece (1), a hollowed damping rubber (2), a framework (3), a constraint damping rubber layer (4) and a base (5) connected in turn, wherein one end of the hollowed damping rubber (2) is connected with the upper steel piece (1), the other end of the hollowed damping rubber (2) is connected with the framework (3), the framework (3) is connected with the constraint damping structure (4) and the base (5) is connected with the constraint damping layer (4) so as to form the corner-free rubber shock absorber. By introducing a constraint damping mechanism, coupling of internal and external vibration is effectively removed; the designed corner-free rubber shock absorber ensures small angular displacement change by three-directional equal rigidity and normal work and accurate output of electronic equipment and precision instruments under ...

高效负离子保健刷丝及其生产方法

The present invention is one kind of negative ion containing nylon bristle and its production process. The negative ion containing nylon bristle is produced by adding negative ion powder in 1-2 % into nylon material and other steps, and has the functions of releasing negative ion for bacteriostasis. The production process is simple, low in cost and no toxic side effect, and the nylon bristle may be used in making various brushes for making up, combing, cleaning, etc. and the brushes have the functions of promoting blood cell activity, strengthening metabolism, raising immunity, inhibiting bacteria growth and eliminating static electricity.

Bi-component composite fiber elastic non-woven and processing method thereof

The invention relates to the field of non-wovens, and provides an elastic non-woven and a processing method thereof. Multi-component composite fibers are subjected to opening, mixing, carding, laying, and spunlacing or needle-punching entanglement to prepare the non-woven, and then the non-woven is subjected to heat treatment, wherein the range of spunlacing drying temperature is between 70 and 150DEG C; the temperature of an oven for heat treatment is between 120 and 180DEG C and the time for heat treatment is 0.5 to 3min; and the range of the overfeed rate is 0 to 60 percent. The non-woven has good elasticity, and overcomes the defects that the precious high-elasticity fibers can be adopted only to manufacture the elastic non-woven and the processing technology is complicated in the prior art.

Super-hydrophobic porous polyvinyl chloride film and its preparing process

The present invention belongs to the field of porous polyvinyl chloride film material, and is especially super-hydrophobic porous polyvinyl chloride film and its preparation process. By means of solvent-precipitant phase conversion process, porous loose polyvinyl chloride film with surface micro structure of piled micron and nanometer level grains is prepared, and the film has water contact angle greater than 150 deg, water drop rolling angle smaller than 15 deg and extremely high super-hydrophobic property. The present invention provides new method of realizing super-hydrophobic characteristic of polymer film without modification of low surface energy matter and opens one new way of expanding the application fields of common plastics.

Hydrophilic nano montmorillonoid and its prepn

The present invention relates to nano material technology, especially, hydrophilic nano montmorillonite and its preparation. The hydrochloric acid solution of organic intercalating agent is added to the water solution of sodium-base montmorillonite with charge exchange amount of 80-100 mmol/100 g to prepare organic montmorillonite slurry with the molar charge exchange amount ratio between the organic intercalating agent and montmorillonite being 1-2. Modifiying agent in the molar amount of 1-4 time that of the added organic intercalating agent is added to the slurry via stirring at 40-80 deg.c for 3-6 hr to obtain the hydrophilic nano montmorillonite comprising montmorillonite and organic intercalating agent in the weight ratio of 1-10.

Method for treating surface of attapulgite

The invention belongs to inorganic/organic composite material, and in particular relates to a method for treating the surface of attapulgite (ATP). The method comprises the following steps of dispersing and compounding the attapulgite and an oxidized polyethylene emulsion under ultrasonic conditions, obtaining a compound after dispersing the attapulgite in the oxidized polyethylene emulsion, settling the compound directly or after adding in an sedimentation agent, applying repeated shearing action to the compound on a device with strong mechanical shearing action force and then obtaining the attapulgite which can be applied to compound polymers and is treated via oxidized polyethylene. The attapulgite treated through the method can be directly used for preparing polymer nanometer composite materials with high performance.

Nano pearl polypropylene superfine Denier fibre and preparation method thereof

The invention belongs to textile field, especially involves nano-pearl polypropylene superfine denier fibers and the preparation method. Said nano-pearl polypropylene superfine denier fiber is combined by nano-pearl powders and polypropylene superfine denier fiber, among them the weight of nano-pearl powders is 0. 1% - 15% of the total weight of nano-pearl polypropylene superfine denier fiber, the filament number of the nano-pearl polypropylene superfine denier fiber is 0. 1-0. 5 denier, the tensile strength is 6 - 8 g / denier, the elongation at break is 25 - 70%. The fiber contains more than 10 amino acids and a variety of trace elements of nano-pearl; it not only has the pearl effect of caring face and skin, but also has the characteristics of comfortable intake of superfine denier fibers; the cloth produced by the fiber in the invention has a good role of nutrition and health.

Filtering and demulsifying material with super-parents characteristic and its preparation and use

A demulsifying filter material with superhydrophilicity and super lipophilicity for demulsifying and filtering the emulsion is prepared from the porous basic material through coating a layer of TiO2 film which contains organic silicon adhesive and can be solidified at ordinary temp, or coating a layer of TiO2 film to be sintered at high temp, or conting a TiO2-SiO2 film to be sintered at high temp, and UV irradiating.

Surface treatment method for aluminum oxide

The invention belongs to inorganic/organic composite materials, and particularly relates to a method for treating the surface of aluminum oxide by using macromolecular surface modifier. The aluminum oxide treated by the method provided by the invention can be used for preparing high-performance composite materials. The method comprises the following steps: mixing aluminum oxide granules and water-based acrylic resin under ultrasonic conditions to form a water-based-acrylic-resin-coated aluminum oxide granule compound; and repeatedly grinding the compound on a facility with strong mechanical shearing action force, and drying to obtain polyacrylic-resin-treated aluminum oxide, thereby obtaining the polyacrylic-resin-coated aluminum oxide compound. The polyacrylic-resin-coated aluminum oxidecompound can be directly melted and mixed with polyolefines (such as high-density polyethylene), or melted and mixed with polyolefines after being pulverized.

Method for producing polypropylene concrete reinforced fiber

The invention refers to a method of producing PP-concrete reinforcing fiber. The diameter of spinning aperture is 0.6-0.8 mm and the ratio of long diameters is 1:8-1:12, which can evenly spin high-intensity low-modular magnitude fiber. The equipment of filature adopts emulsion water for cooling; the fiber is cut into length specification of 8mm, 12mm and 19mm. The activating agent of fiber surface adopts organic silicon, oxosilane, alkyl-phosphate, aging-resisting agent and dispersant to carry through secondary activating treatment; fiber size, namely single thread is 20g/denier-30g/denier.

Internal wave type non-crankshaft internal combustion engine

The invention discloses an internal wave type crankshaft-free internal combustion engine. An internal wave wheel and a dual cascade valve cam are both fixed on an output shaft. Twelve cylinders are axially, symmetrically, annularly and evenly arranged on the circumference of the dual cascade valve cam inside the internal wave wheel. One end of a push rod is hinged with pistons; the other end of the push rod has a cam roller and a push rod roller; and the cam roller is inserted into a shape groove of the internal wave wheel, and the push rod roller is arranged in a guide groove. The driving force of the pistons is transmitted to the internal wave wheel and the output shaft by the push rod and is outputted, thereby saving a crankshaft and a connecting rod in the prior internal combustion engine. The guide groove bears a circumferential component force of the force given to the push rod by the internal wave wheel, thereby bringing about zero side pressure between the pistons and the cylinder ...

Bi-component composite fiber elastic non-woven and processing method thereof

The invention relates to the field of non-wovens, and provides an elastic non-woven and a processing method thereof. Multi-component composite fibers are subjected to opening, mixing, carding, laying, and spunlacing or needle-punching entanglement to prepare the non-woven, and then the non-woven is subjected to heat treatment, wherein the range of spunlacing drying temperature is between 70 and 150DEG C; the temperature of an oven for heat treatment is between 120 and 180DEG C and the time for heat treatment is 0.5 to 3min; and the range of the overfeed rate is 0 to 60 percent. The non-woven has good elasticity, and overcomes the defects that the precious high-elasticity fibers can be adopted only to manufacture the elastic non-woven and the processing technology is complicated in the prior art.

Nonwoven fabric for air wetting purification and preparation method thereof

The invention relates to a nonwoven fabric for air wetting purification, wherein the nonwoven fabric for air wetting purification has a liquid-absorption height of 100-200mm and a wetting tensile strength of 3.0-8.0KN/m; preferably, the liquid-absorption height is 120-180mm and the wetting tensile strength is 5.0-8.0KN/m; and optimally, the liquid-absorption height is 130-160mm and the wetting tensile strength is 5.5-8.0KN/m. A method for preparing the nonwoven fabric for air wetting purification comprises the following steps: mixing water-absorption resin with antibacterial agent as a working solution; coating the working solution onto the nonwoven fabric by using a soaking or coating method; and drying and baking the nonwoven fabric, so as to acquire the nonwoven fabric.

Method for separating fiberglass cloth and sheet metal in waste printed circuit board

The invention belongs to the recycling of a waste printed circuit board, in particular relates to a method for separating fiberglass cloth from a metal layer (such as a copper foil, a copper wire, etc.) in the waste printed circuit board. According to different structures and requirements of the waste printed circuit board, the appropriate thermal medium is chosen; at the room temperature of 250 DEG C, the waste printed circuit board is arranged in thermal medium so that the bonding force between the glass fiber cloth and the metal layer is reduced; when bonding force disappears, according to the differences of heat transmission coefficients between the glass fiber cloth and the metal layer, the glass fiber cloth is separated from the metal layer in the waste printed circuit board arranged in the thermal medium through mechanical or manual manners, so as to recycle the glass fiber cloth and the metal layer. The method provided by the invention can effectively separate the glass fiber cloth ...

Production process of engineering fibre for polyester road

A process for preparing the polyester fibres used for road engineering includes such steps as pretreating the polyester as raw material, fusing and extruding by screw extruder, jet spinning, cooling,prestretching, winding, collecting to 6-7 hundred thousands dens, tension mixing, stretching in oil bath, stretching, adding hot activator, stretching, adding hot activator, overheat stretching, extension, compression, drying and cutting short.

MATERIAL FOR 3D PRINTING, PROCESS FOR PREPARING THE SAME AND ARTICLE THEREOF

The present invention provides a composition for 3D printing, a process for preparing the same and an article thereof. By the solidifying method of UV irradiation, 3D printing is implemented. During said implementation, there is no need of high temperature heating, thus energy consumption is reduced, and there is no need for special solvent, thus harm to the environment is reduced. Meanwhile, the present invention uses micro-nano powder as the main material and polymer resin as adhesive, and at the same time, adds irradiation sensitizer. After electron beam irradiation, the polymer resin forms three-dimensional crosslinked network, thereby the strength, heat resistance and chemical resistance are improved after resin adhesion. Additionally, the present invention, by the addition of UV crosslinking agent, and by UV irradiation, cross-links the unsaturated resin after extrusion in 3D printing to form three-dimensional network structure, thus greatly improves the heat resistance, chemical resistance and mechanical strength of the shaping material, and makes the unsaturated resin have broader application prospects in 3D printing material. 1. A composition for 3D printing comprising the following components:photosensitive monomer: 100 parts by weight,photoinitiator: 1 to 3 parts by weight,micro-nano powder: 1 to 30 parts by weight,crosslinking agent: 1 to 30 parts by weight,toughening agent: 1 to 10 parts by weight, andpigment: 5 to 10 parts by weight;wherein the photosensitive monomer is monofunctional acrylate which is in liquid state at room temperature.2. The composition according to claim 1 , wherein the monofunctional acrylate which is in liquid state at room temperature is one or more selected from the group consisting of methyl methacrylate claim 1 , ethyl methacrylate claim 1 , propyl methacrylate claim 1 , isopropyl methacrylate claim 1 , benzyl methacrylate claim 1 , lauryl methacrylate and acrylate derivatives;preferably, the photoinitiator is alkylphenones, ...

NYLON POWDER COMPOSITION FOR 3D PRINTING, AND PREPARATION METHOD AND APPLICATION THEREOF

This invention relates to a high molecular weight nylon powder composition for 3D printing, its preparation method and use. The composition comprises: 100 parts by weight of high-viscosity nylon powder, 1-5 parts by weight of a flow agent, and 0.1-1 parts by weight of an antioxidant; the high-viscosity nylon powder is one or more selected from nylon 6, nylon 66, nylon 11, nylon 12, nylon 612 and nylon 610; or the powder composition is obtained via polymerization reaction of the raw materials comprising the following components, based on the weight parts of lactam monomers or amide monomers: 100 parts by weight of lactam monomers or amide monomers, 0.005-1 parts by weight of a catalyst, and 0.1-1 parts by weight of an antioxidant. The high molecular weight nylon powder composition prepared in the present invention has a particle diameter in the range of 20-100 micrometers, good powder spreading performance, and is suitable for the 3D printing process, and the product of the high molecular weight nylon powder composition has good mechanical properties, good dimensional stability and low manufacturing cost. 2. The high molecular weight nylon powder composition according to claim 1 , wherein claim 1 , when said monomer is lactam claim 1 , said catalyst is an alkaline catalyst.Preferably, when said monomer is amide monomer, the added amount of said catalyst used is 0.02-0.8 parts by weight.3. A method for preparing the high-viscosity nylon powder for 3D printing claim 1 , wherein said method comprises the following steps of:(1) after homogeneously mixing 100 parts by weight of moderately low-viscosity nylon powder and 30-300 parts by weight of inorganic solid particles, adding the mixture into a reactor together;{'sub': '2', '(2) purging the reactor with Ngas; uniformly raising the reactor temperature up to 180-250° C. in 90-120 minutes, and keeping the temperature constant for 0.5-10 hours;'}(3) opening the discharge valve of the reactor to discharge into a container, ...

ULTRAVIOLET LASER 3D PRINTING METHOD FOR PRECISE TEMPERATURE CONTROL OF POLYMER MATERIAL AND DEVICE THEREOF

The present disclosure disclosed an ultraviolet laser 3D printing method for the precise temperature control of polymer material and device thereof. The device comprises a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a material to be processed, a computer control system and so on. The method comprises: presetting a processing temperature by the control system; during the processing procedure, the temperature rise condition of the processed object is monitored by the non-contact type temperature monitoring device and fed back in real time to the control system; and by recording the rise value of the temperature within a certain period, the system can obtain the absorption capability of the laser and the temperature rise degree of the processed material, so that the laser output power can be calculated according to the preset processing temperature value, and the laser power can be adjusted in real time to precisely control the processing temperature. By means of the above device and method, precise temperature control of ultraviolet laser 3D printing prototyping for polymer materials can be realized. 1. An ultraviolet laser 3D printing device for the precise temperature control of polymer material , wherein the device comprises a thermostat for maintaining a constant temperature of working environment , and a processing platform for supporting the object to be formed is equipped in the thermostat;a powder laying device capable of coating the polymer material on the platform is equipped on the processing platform, and a laser head capable of emitting a directional ultraviolet laser beam is equipped above the processing platform, wherein said ultraviolet laser beam can be deflected to the processing platform by a scanning galvanometer;a non-contact type temperature monitoring device is equipped at a distance above the processing platform, and said temperature ...

Ultraviolet laser 3D printing method for precise temperature control of polymer material and device thereof

An ultraviolet laser 3D printing device includes a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a material to be processed, a computer control system. The device is configured to perform the following functions: presetting a processing temperature by the control system; during the processing procedure, the temperature rise condition of the processed object is monitored by the non-contact type temperature monitoring device and fed back in real time to the control system; and by recording the rise value of the temperature within a certain period, the system can obtain the absorption capability of the laser and the temperature rise degree of the processed material, so that the laser output power can be calculated according to the preset processing temperature value, and the laser power can be adjusted in real time to precisely control the processing temperature.

Modified polypropylene spunbond non-woven fabric and preparation method thereof

A modified polypropylene spunbond non-woven fabric and a preparation method of the modified polypropylene spunbond non-woven fabric are provided. The modified polypropylene spunbond non-woven fabric contains a modified nanocomposite material including an organic compound, the organic compound including one of tea polyphenol, naringin, and emodin. The organic compound is in a weight percentage range of approximately 0.1%-5% based on a total weight of the modified polypropylene spunbond non-woven fabric.