45results about How to "Good thermoplastic processability" patented technology

The invention relates to a paper making material, a preparation method and a paper making method of environment-friendly synthetic paper. The material comprises modified mineral fiber, thermoplastic starch, cellulose derivative, compatilizer, auxiliary components and the like, wherein the average particle diameter of the modified mineral fiber is 5-10 micrometers, the ratio of the length of the modified mineral fiber to the diameter of the modified mineral fiber is 8-15:1, and the modified mineral fiber is treated by fibrosis ultrafine grinding and surface recombination modification; the thermoplastic starch is formed by performing micronization and plasticization modification on norm starch; and the auxiliary components comprise lubricant and colorant. The paper making material is prepared by sequentially mixing the raw material components fully and then extruding and granulating the mixture by a screw extruder at 60-180 DEG C. According to the plastic process mode, the material can be treated by blow molding through a calender or a paper film machine for carrying out two-way stretch to prepare corresponding paper products. The paper making material can overcome the defects of the current synthetic paper and can be widely applied to the fields of commercial printing, publications, office paper, packing and the like, and the processing procedure of making paper by using plastic processing equipment has environmental protection and low cost.

The invention discloses a thermoplasticity environmentally-friendly stone paper and a preparation method. The thermoplasticity environmentally-friendly stone paper comprises the following components in parts by weight: 80-90 parts of inorganic mineral powder, 3-5 parts of surface active ingredient, 2-3 parts of polymer monomer, 0.01-0.05 part of initiator and 5-15 parts of lubrication accessory ingredient, wherein the inorganic mineral powder is at least one of various inorganic mineral powders, such as wollastonite of which the grain diameter is 5-10 mu m, bentonite and the like; the surface active ingredient comprises at least one of anion surface active ingredient comprising inorganic acid ester; and the polymer monomer is one of methyl methacrylate, methyl acrylate, butyl acrylate and styrene. The thermoplasticity environmentally-friendly stone paper contains 90% of inorganic mineral powder, has favoarble thermoplasticity processing performance and can use the thermoplasticity processing equipment to carry out quick blow molding or calendaring and drawing shaping; and paper has obvious vertical and horizontal orientation, good deflection and strong rigidity, and appearance texture more approaches the traditional paper. The thermoplasticity environmentally-friendly stone paper is a novel environmentally-friendly paper.

The invention discloses a porous ceramic microsphere composite material for 3D printing. The porous ceramic microsphere composite material is mainly composed of porous ceramic microspheres and thermoplastic resin, wherein the porous ceramic microspheres account for 80-99% of total weight, and the thermoplastic resin accounts for 1-20% of the total weight. The raw materials undergo extrusion pelletization through a twin-screw extruder so as to prepare the ceramic material for 3D printing. By characteristics of good fluidity and low density of the porous ceramic microspheres and by combination of thermoplastic processability of the thermoplastic resin, the characteristic of low thermoplastic processability of the ceramic material is overcome, and more selections are provided for a 3D printing material. The invention also discloses a preparation method of the ceramic material. More printing material selection spaces are provided for a three-dimensional printing technology, and a three-dimensional structured product of the ceramic material is prepared by a fused deposition modeling 3D printing technology. The production technology is simple, low-cost, safe and environmentally friendly, and has a market application prospect.

The invention relates to a starch and polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 20 to 75 parts of modified starch, 10 to 65 parts of polylactic resins, 2 to 10 parts of hydroxy-terminated lactic acid oligomer with molecular weight of 800 to 2000, 1 to 10 parts of plasticizers, 0.1 to 1.0 part of aliphatic chain extenders, 0.5 to 2 parts of talcum powders and 0.1 to 3 parts of auxiliaries. The preparation method includes that firstly the modified starch, the polylactic acids, the hydroxy-terminated lactic acid oligomer, the plasticizers, the talcum powders, lubricating agents and coupling agents are blended together in a homogenizer to obtain a blend, and then a mixed material of the blend and the chain extenders is added in a twin-screw extruder to be subjected to melt extrusion, cooling and granulation to obtain the starch and polylactic acid composite material. The starch and polylactic acid composite material has the advantages that the compatibility, toughness and heat resistance are good, the cost is low, the biodegradation can be completely achieved, the preparation technique process is simple, the 'three wastes' emission is absent, and the mass production can be achieved.

The invention relates to a thermoplastically modified high-fluidity polyvinyl alcohol casting film material and a preparation method thereof. A purpose of the present invention is mainly to solve theproblems of poor thermoplasticity, difficult processing, poor melt fluidity, easy thermal-oxidation degradation, difficult casting film preparation and poor mechanical property of polyvinyl alcohol inthe prior art. The technical scheme comprises that the thermoplastically modified high-fluidity polyvinyl alcohol is used, and comprises, by mass, 1) 70-99.9 parts f polyvinyl alcohol, and 2) 0.1-30parts of a plasticizer, the polyvinyl alcohol and the plasticizer are respectively introduced into a twin-screw extruder, and melt extrusion and granulation are performed through a screw rod extrusionprocessing technology to obtain the thermoplastically modified high-fluidity polyvinyl alcohol. With the technical scheme, the problems in the prior art are well solved. The method of the present invention can be used for industrial production of polyvinyl alcohol casting film materials.

The invention discloses an EVOH (ethylene vinyl alcohol) resin and a preparation method thereof and relates to a resin and a preparation method thereof, and the method provided by the invention can be used for solving the problems of complex process for the production of the EVOH resin and large production difficulty in traditional methods. The EVOH resin is prepared through the following steps: stirring polyvinyl alcohol, a plasticizer, an ethylene unsaturated monomer, maleic anhydride graft polypropylene resin, an initiator, a catalyst, an anti-yellowing agent and a surfactant, and then pelletizing the mixture in a double-screw extruder. The method provided by the invention is simple in process and small in equipment investment, and the EVOH resin has the advantage of stable quality.

A fat polyester/starch/clay ternary degradable resin and its production are disclosed. The resin consists of vegetable starch, fat polyester, clay mineral material, gel promoter, plasticizer, antioxiant, lubricant and compatibilizer. The process is carried out by weighing raw materials proportionally, mixing vegetable starch with plasticizer and gel promoter from high-speed mixer, stirring for 5-30mins, laying aside for 1-2 day, preplasticizing mixture, adding mixture, fat polyester, clay mineral material, antioxidant and lubricant into double-screw extruder, melting and mixing from double-screw extruder, reacting and extruding, and obtaining the product. It achieves simple process, good biological degradability and no environmental pollution.

The invention discloses polyvinyl alcohol capable of being subjected to melting processing modification, wherein the modified polyvinyl alcohol is a random copolymer and has the following structure general formula defined in the specification, R1, R2 and R3 are alkyl substituents, at least one of the substituents is methyl, the sum of the carbon atoms in R1, R2 and R3 is 7-9, x is more than 1, y is more than 1, z is more than 1, a molar ratio of x to y to z is (81-93):(4-12):(2-8), the polymerization degree is 500-1000, the melting temperature is 180-220 DEG C, the decomposition temperature is 260-290 DEG C, the melt index MI is 1.0-5.0 g/10 min (10 kg 210 DEG C), the tensile strength is 80-110 MPa, the elongation at break is 20-40%, and the notch impact strength is 6-10 KJ/m<2>. The invention further discloses a preparation method of the modified polyvinyl alcohol, wherein the preparation method has characteristics of easily available raw materials and simple operation, and is suitable for industrial production.

The invention relates to a thermoplastic polyimide cable material for nuclear power aviation. The thermoplastic polyimide cable material comprises, by weight, 5-30 parts of polyimide, 5-30 parts of polyetherimide, 30-70 parts of siloxane-containing polyetherimide, 5-30 parts of ether bond-containing polar resin, 5-30 parts of a liquid crystal polymer, 5-30 parts of non-polar crystalline resin, 5-30 parts of silicon resin, 5-20 parts of talcum powder, 0.2-1 part of a processing aid, 0.1-1 part of an antioxidant and 0.1-10 parts of an additive. Different types of polyimide base resins are mixedand used, and the polar resin containing ether bonds, the liquid crystal polymer, the non-polar crystalline resin, the silicon resin, the talcum powder and the like are used to improve the proecsing properties of the material, so the heat resistance and the processing properties are improved, and the radiation resistance, the high flame retardant property, the high insulating property and other comprehensive properties of the base material are also improved; and the cable material can be processed by using traditional thermoplastic cable processing equipment, so the cable processing technologyis simplified.

The present invention discloses a method for processing a scrap wire and cable. The method comprises the steps of (1) carrying out pretreatment of the skin materials of a scrap wire and cable as raw materials, crushing the materials and then screening the materials, taking the granules of 5 to 20 meshes, and mixing the granules and sodium bicarbonate to obtain a mixed material, (2) winding a layer of polyester film around the outer part of a oxygen-free copper and tinned copper compound stranded wire which is taken as a soft conductor to be a winded polyester belt layer, (3) extruding an insulating layer outside the conductor winded in the step (2) with the mixed material obtained in the step (1) as a raw material by using an SJ-65/25 extruder, wherein the extrusion should be uniform, the thickness is consistent, the surface is smooth, and the color is consistent, (4) winding a layer of fire-resistant ceramic silicone rubber belt outside the insulation layer to be a fire-resistant layer, wherein the winding should be uniform without wrinkles, the thickness is consistent, the surface is smooth, and the color is consistent, and (5) extruding an insulation layer outside the fire-resistant layer completed in the step (4) with the mixed material obtained in the step (1) as a raw material by using an SJ-90 or120 extruder to obtain a product.

The invention discloses a high-strength rubber insulated cable. The high-strength rubber insulated cable comprises conductors, wherein a wrapping polyester tape layer is arranged outside the conductors, an insulating layer is arranged outside the wrapping polyester tape layer, a fireproof layer is arranged outside the insulating layer, and a sheath is arranged outside the fireproof layer. The high-strength rubber insulated cable has the advantages that high strength is more than two to three times that of a traditional rubber insulated cable sheath, and the highest strength can reach 30 Mpa; the international advanced levels of low temperature resistance (minus 40 DEG C) and torsion resistance (minus 50 DEG C) are achieved; excellent resistance to light, heat, aging, oil, water, acid and alkali salt is obtained; flame retardance, cleanliness, environment friendliness and nontoxicity are achieved, and the flame retardance can reach the UL-Vo level; excellent thermoplastic processing performance is achieved, clean materials can be directly recovered and processed again, and the materials are saved; the small specific gravity is 0.91 g/cm<3> and is 0.64 time that of common rubber, the weight of the cable can be reduced, and very high cost performance is obtained; excellent electrical insulation performance is obtained; dielectric strength is greater than or equal to 20 kv/mm, and the volume resistivity at 20 DEG C is greater than or equal to 10<15> omega*cm.

The invention discloses a high-temperature-resistant easy-to-process thermoplastic transparent polyimide resin material with a low thermal expansion coefficient and a preparation method thereof. High-molecular-weight high-temperature-resistant thermoplastic transparent polyimide resin with a glass transition temperature being greater than 240 DEG C and a thermal expansion coefficient being less than 45ppm/K, an antioxidant, a lubricant and low-molecular-weight polyimide resin are blended and extruded to obtain aggregates, due to adoption of thelow-molecular-weight polyimide resinwith good compatibility with the thermoplastic polyimide body, the antioxidant and the lubricant, the melt index of the resin is greatly increased, the processing temperature is greatly reduced, the resin can be subjected to melt extrusion for many times subsequently, the processing stability of the resin is improved, and the material can be used for processing such as multi-time extrusion injection molding.

The invention discloses a thermoplastic polyimide resin material with a low thermal expansion coefficient. The thermoplastic polyimide resin material is prepared from the following components in percentage by mass: 80-99% of high-temperature-resistant thermoplastic polyimide resin of which the glass transition temperature is greater than 250 DEG C and the thermal expansion coefficient is less than 40ppm/K; 0.1-15% of thermoplastic polyimide resin having a glass transition temperature of less than 220 DEG C and a logarithmic viscosity of more than 0.30 dL/g; 0.2 to 5% of an antioxidant; and 0.2-5% of a lubricant. The invention further provides a preparation method. According to the invention, by blending with the high-molecular-weight and high-melt-index thermoplastic polyimide resin with the glass transition temperature of less than 220 DEG C and the logarithmic viscosity of more than 0.30 dL/g, and matching with the antioxidant and the lubricant, the thermoplastic processability of the resin is improved, the processing temperature and melt viscosity are reduced, and the mechanical properties of the resin are improved. The melt index, the thermoplastic stability and the service life of the product are improved.

The invention discloses a formula of a bio-based degradable material. The formula comprises the following raw materials in parts by weight: 30-100 parts of biological filler, 1-10 parts of PCL and 1-10 parts of a degradable liquid toughening agent. The preparation method of the bio-based degradable material comprises the following steps: weighing the raw materials in proportion, putting the raw materials into a high-speed stirrer to be uniformly stirred, and then pouring the raw materials into an annular mill or a flat mill to be granulated so as to form the bio-based degradable material. According to the invention, the interface bonding force between the degradable resin and the filler can be increased, the overall thermoplastic processability of the degradable material can be improved, and the cost can be reduced.