939 results about "Heat setting" patented technology

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The invention relates to the technical field of microfiber material preparation, in particular to a preparation method of an insulating flame-retardant automotive interior microfiber material, which comprises the following steps: spinning sea-island fibers by taking PA6 as an island component and LDPE as a sea component and matching with master batches; performing opening, carding, lapping, pre-needling by a pre-needling machine and needling by a needling machine on the sea-island fibers to prepare non-woven fabric; carrying out heat setting on the non-woven fabric; preparing insulating flame-retardant polyurethane slurry, infiltrating the heat-set non-woven fabric to enable the non-woven fabric to be fully impregnated, and then feeding the non-woven fabric into an aqueous solution of dimethylformamide to be subjected to water bath curing, so as to prepare a semi-finished synthetic leather product; extracting sea components in the sea-island fibers from the synthetic leather semi-finished product by adopting a stripping process; and drying the reduced superfine fiber synthetic leather base cloth, immersing the base cloth into a softening agent aqueous solution, and then carrying out drying and leather rubbing treatment to obtain the insulating flame-retardant superfine fiber leather. The product provided by the invention is used for external protection of an intelligent auxiliary driving steering wheel sensing layer, and the resistance of the microfiber material reaches 1.2 megohm or above.

The invention relates to the field of fiber production, and particularly discloses a zinc oxide antibacterial ES fiber and a preparation method thereof. The zinc oxide antibacterial ES fiber comprises a core layer and a surface layer, and the surface layer comprises the following raw materials in parts by weight: 80-100 parts of polyethylene, 2-5 parts of a nano-zinc oxide composite material, 1-2 parts of a dispersing agent and 2-3 parts of a compatilizer; the nano-zinc oxide composite material is prepared from hydroxyapatite nanowires, a polyethylene glycol solution and coated nano-zinc oxide in a mass ratio of 1: (8-10): (1.5-2); the preparation method comprises the following steps: melting the material of the core layer to obtain a melt; mixing polyethylene, the nano-zinc oxide composite material, a dispersing agent and a compatilizer, and melting to obtain a polyethylene melt; and mixing the melt and the polyethylene melt, spinning, bundling, stretching, carrying out heat setting, curling and cutting off to obtain a finished product, the fiber has the advantages of being good in antibacterial property, high in mechanical strength, good in spinning stability and good in air permeability.

The invention provides a superfine denier profiled polyester staple fiber and a preparation method thereof.The preparation method includes the steps of raw material pretreatment, melt spinning, nascent filament treatment, heat setting and curling, oiling and cutting off and the like, polyester chips have high intrinsic viscosity and melting point, and under the action of six-zone temperature control, a high-hole-density spinneret plate and a high draft multiple, the polyester chips are subjected to melt spinning, so that the polyester chips are prepared into the superfine denier profiled polyester staple fiber. The superfine, special-shaped and hollow polyester staple fibers are prepared. The obtained polyester staple fiber has good breaking strength, rebound resilience and a low-defect structure, the bulkiness, flexibility and structural consistency of the fiber are remarkably improved, the environment and process limitation of a traditional sea-island fiber alkali stripping method is broken through, and the polyester staple fiber is suitable for the fields of high-end filling, plush imitation, non-woven materials and the like.

The invention discloses a polyacrylonitrile carbon fiber and a preparation method thereof, and the method comprises the following steps: (1) copolymerizing acrylonitrile and acrylamidine to obtain a polymer spinning solution; (2) sequentially carrying out spinning, solidification forming, first-stage drafting, washing, oiling, drying, second-stage drafting and heat setting on the polymer spinning solution to obtain a polyacrylonitrile precursor; and (3) sequentially carrying out pre-oxidation and carbonization treatment on the polyacrylonitrile precursor to obtain the polyacrylonitrile carbon fiber. Therefore, by adopting the method, the radial structure difference of the nascent fiber can be effectively controlled, the radial structure of the obtained nascent fiber is more homogeneous, and the radially homogeneous polyacrylonitrile precursor is obtained, so that the prepared carbon fiber is more excellent in performance or larger in diameter, and meanwhile, an ammonification process link is omitted.

The invention discloses a preparation method of composite geotechnical cloth, belongs to the technical field of geotechnical material processing, and solves the problems of insufficient interlayer bonding strength, poor permeation stability and incapability of adapting to regional differentiation mechanical requirements in the traditional process. According to the method, two layers of synthetic fiber geotextile and a layer of polymer geomembrane are selected, and a gradient needling machine is adopted to implement a double-station gradient needling process, specifically, thick needle needling pre-reinforcement is synchronously conducted on the upper side and the lower side till the membrane thickness is 50-60% of the depth, then fine needle needling finishing is conducted till the membrane thickness is 70-80% of the depth, the needling density is preset to be 20-70 needles / cm according to different stress areas of a membrane material, and the needling density is 20-70 needles / cm according to different stress areas of the membrane material; in the process, data of needling depth, needling density and membrane material tension are collected in real time through a dynamic monitoring system, parameters are automatically adjusted, and finally a stable structure is formed through heat setting treatment at 120-140 DEG C for 8-12 minutes. The composite geotextile prepared by the method has a high-strength bonding interface and excellent anti-seepage performance, and is suitable for the engineering fields of water conservancy project anti-seepage, road base reinforcement, refuse landfill isolation and the like.

The invention relates to a method for preparing a coarse denier non-crimp dumbbell-shaped full-dull polyester staple fiber, wherein the full-dull polyester slice is dried, melted by a screw extruder, spun by a dumbbell-shaped special-shaped hole spinneret, cooled by short-distance blowing with a ring blow tube, wound, and dropped into a barrel to obtain a raw fiber, and the raw fiber is subjected to the steps of post-spinning bundling, first-stage oil bath drawing, second-stage steam drawing, tense heat setting, stacking and oiling, and cutting to obtain a coarse denier non-crimp dumbbell-shaped full-dull polyester staple fiber; the dumbbell-shaped special-shaped hole spinneret is The diameter is 220mm, the dumbbell-shaped hole length is 2.2±0.025mm, the dumbbell-shaped hole points to the center of the spinneret at 15°, the number of holes is 208, each circle has 52 holes, a total of 4 circles, the circle radial center distance is 9mm, the shortest distance from the spinneret surface to the top row of air holes of the ring blowing tube is 30mm, the wind speed is 1.7-1.8m / s; the winding speed is 1050-1150m / min; the nozzle stretching multiple is 160-190 times. The present invention effectively solves the problem that the coarse denier non-curled dumbbell-shaped full-dull polyester staple fiber has high defects and is dispersed.

The invention discloses a high-strength wear-resistant yarn and a manufacturing method thereof, and belongs to the field of spinning, the manufacturing process sequentially comprises the steps of opening, carding, drawing, roving and spinning, the raw materials used for opening comprise 70 wt% of aramid fiber and 30 wt% of cotton; in the spinning procedure, single yarns are twisted firstly, then two single yarns are plied to obtain plied yarns, the twist degree of the single yarns is 900-950 twists / m, the two single yarns have the same twist direction, and the single yarns and the plied yarns have opposite twist directions; and carrying out heat setting treatment on the plied yarn to obtain the high-strength wear-resistant yarn. Aramid fibers and cotton fibers in a specific proportion are selected as spinning raw materials, single yarns with specific twist are made and then reversely twisted to form plied yarns, finally, internal stress of the yarns is eliminated through heat setting treatment, the twist is stabilized, creep deformation in use is reduced, and the prepared yarns can be used in the industrial field, daily supplies, outdoor equipment and other products needing high wear resistance and have wide application prospects. The fabric is comfortable and soft, and the durability is improved.

The invention relates to the technical field of shoemaking equipment, in particular to a cold and hot setting machine for shoe processing and a setting technology.The cold and hot setting machine for shoe processing comprises a machine body, a hot mold assembly, a shoe mold assembly and a cold mold assembly, the hot mold assembly is arranged on one side of the machine body and used for conducting heat setting on toe cap fabric, and the cold mold assembly is arranged on the other side of the machine body; the shoe mold assembly and the cold mold assembly are both arranged on the machine body, the cold mold assembly is opposite to the shoe mold assembly in the vertical direction, and the cold mold assembly is used for conducting cold setting on the shoe head fabric obtained after heat setting. The middle flexible pressing pads are arranged, materials at the thick positions of the turnup parts are promoted to be dispersed to all positions of one circle of the turnup parts through intermittent rotation of the two middle flexible pressing pads, so that the thickness consistency of all positions of one circle of the toe cap fabric is improved, and in the subsequent cooling and shaping process of the toe cap fabric, the thickness uniformity of the toe cap fabric is improved. The cooling speeds of all parts of the toe cap fabric in one circle are basically consistent, so that the cooling and shaping effects of the shoe mold assembly on the toe cap fabric are better.

The invention discloses a high transparency and high toughness polyamide fiber preparation method, which comprises: S10: carrying out melt blending on polyamide and an ethylene-alpha-olefin copolymer elastomer, and extruding under the high shear action to obtain a modified melt; s20, the modified melt is extruded through a spinneret plate to form nascent filaments, the nascent filaments are fed into a cooling area to be rapidly cooled, and nascent fibers are obtained; the retention time of the nascent filaments in the cooling area is 0.1-0.3 second, nitrogen is adopted as a cooling medium in the cooling area, and the temperature of the nitrogen is 10-14 DEG C; s30, carrying out hot stretching treatment on the nascent fiber to obtain a stretched fiber; and S40, carrying out heat setting treatment on the stretched fiber to obtain the polyamide fiber. The polyamide fiber prepared by the method has good toughness and relatively high transparency.

The invention discloses a continuous twisting preparation method and system for spiral fiber artificial muscle. The preparation method comprises the following steps: keeping first tension, continuously releasing original fibers at a first pay-off rate, performing twisting treatment, and collecting at a first take-up rate to obtain spiral twisted fibers; the second tension is kept, the spiral twisted fibers are continuously released at a second pay-off rate, the spiral twisted fibers are collected at a second take-up rate after being subjected to annealing treatment, the spiral fiber artificial muscle is obtained, and the second pay-off rate is smaller than the second take-up rate. According to the continuous twisting preparation method provided by the invention, real-time monitoring and automatic adjustment of tension in the fiber preparation process are realized, so that constant tension during continuous fiber preparation is ensured, and meanwhile, the annealing tension is directly associated with the spring index of the artificial muscle fiber through the continuous annealing heat setting device; an industrialization solution is provided for diversified application of the artificial muscle, continuous preparation is achieved, and the preparation efficiency is remarkably improved.

The invention relates to the technical field of aramid fibers, in particular to a high-strength modified meta-aramid fiber and a preparation method thereof. The meta-position aramid fiber overcomes the problem that the meta-position aramid fiber is poor in mechanical property and ultraviolet resistance. The preparation method comprises the following steps: taking MPD and DDS as diamine solids to react with IPC in a polymerization solvent to generate PMIA; the preparation method comprises the following steps: carrying out surface activation treatment on BNNS to prepare f-BNNS; the preparation method comprises the following steps: carrying out surface grafting and activating treatment on TiO2 to prepare ultraviolet-resistant nano TiO2; pMIA, the composite nano suspension and DDSM are mixed in NMP and defoamed to prepare a modified polymer spinning solution, and the high-strength modified meta-aramid fiber with good mechanical properties and ultraviolet resistance is obtained through dry spraying-wet spinning, gradient cleaning, three-stage hot stretching, heat setting, hot drying and rolling.

The invention relates to a polyester film for an electronic tag and a preparation method thereof.According to the polyester film for the electronic tag, a five-layer co-extrusion structure is adopted, a maze effect is formed through nano clay, the gas diffusion path is prolonged by 10-20 times, the symmetrical core layer design is adopted, stress balance is achieved, the bending rigidity is improved, and the service life of the electronic tag is prolonged. According to the preparation method of the polyester film for the electronic tag, a synchronous two-way stretching technology is adopted, the problem of inconsistent directional shrinkage after two-way stretching is solved, a staged heat setting process is adopted, segmented temperature control is matched with slow cooling, residual internal stress is reduced, the thermal expansion coefficient is reduced by adding the carbon nanotubes, and therefore the overall performance is improved, and the service life is prolonged.

The invention relates to an all-cotton four-way stretch fabric and a preparation method thereof, and belongs to the technical field of textile dyeing and finishing. The preparation method comprises the following steps: performing singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinkage and overfeeding soft heat setting on gray fabric to obtain the all-cotton four-way stretch fabric. The warp-wise and weft-wise shrinkage rates of the prepared four-way stretch fabric are-3.0%-0%, the warp-wise elastic elongation rate is 12%-15%, the weft-wise elastic elongation rate is 12%-18%, and the elastic residual elongation rate is smaller than or equal to 8%; obvious warp and weft elasticity can be achieved without elastic fibers, the problems that elastic fabrics such as spandex core-spun yarn fabrics are complex to manufacture, unstable in fabric size and the like are solved, the warp and weft elasticity is obvious, the size stability is good, the hand feeling is soft, and the price is low; the preparation method is simple, does not need equipment transformation, is easy to operate and does not damage fiber strength.

The invention provides a preparation method of fluoride-free anti-wicking polyester industrial yarn, and belongs to the technical field of polyester fibers. The preparation method comprises the following steps: preparing a hydrophobic oil agent by taking a polyurethane polymer or a polyurethane prepolymer as a main body; polyester chips are guided into a screw extruder to be subjected to melt extrusion and then flow out through a spinning assembly, and after primary oiling, drafting and heat setting are conducted, secondary oiling is conducted through a hydrophobic oil agent; and dynamically heating the tows subjected to secondary oiling through multiple rollers to finish fiber shaping and oil film curing, and winding to obtain the finished fluoride-free anti-wicking polyester industrial yarn with the wicking height of less than or equal to 7.5 cm. According to the invention, fluorine-containing waterproof oil agents such as C8 and C6 which are commonly adopted by current anti-wicking fibers are abandoned, polyurethane materials which have no toxic and harmful effects on human bodies are used as the anti-wicking oil agents, and the anti-wicking fiber has the characteristics of environmental protection, flexible oiling point location and simple and convenient operation, and can be easily realized by being matched with an existing melt spinning device.

The invention relates to a bi-component fiber and a preparation method thereof, polyester melt and polyamide melt are extruded from a spinneret plate side by side, cross air blowing cooling is performed to obtain nascent fiber, and then the nascent fiber is sequentially subjected to heat pipe heating, oiling, pre-interlacing, three-roller drafting heat setting and winding to obtain the bi-component fiber. The heat pipe is used for heating nascent fibers, and the temperature of the heat pipe is 90-100 DEG C; the three rollers comprise a first hot roller, a second hot roller and a third hot roller; the temperature of the first hot roller is 70-90 DEG C, the temperature of the second hot roller is 110-130 DEG C, and the temperature of the third hot roller is 140-160 DEG C; the filament number of the prepared bi-component fiber is 2.6-3.5 dtex, the breaking strength is larger than or equal to 3.23 cN / dtex, the elongation at break is 27.45-38.31%, the number of broken ends is smaller than or equal to 2.3 times / (48 bits. 24 hours), and the broken filament rate is stably controlled to be 0.30% or below. According to the preparation method, generation of internal stress is greatly reduced; the mechanical property of the bi-component fiber is improved, and the number of broken ends and the broken filament rate of the fiber are obviously reduced.

The present invention provides a waterproof breathable membrane, a preparation method therefor, and a composite fabric comprising same. The preparation method for a waterproof breathable membrane comprises: performing first mixing of a polyolefin raw material and a solvent to obtain a premixed gel; performing second mixing of an elastomer and a solvent, and then performing third mixing with the premixed gel to obtain a mixed gel; performing melt extrusion on the mixed gel to obtain an initial gel membrane, followed by performing initial stretching on a biaxial stretching machine, and then extracting by using an extracting agent to obtain an initial microporous membrane; and performing expanded stretching on the initial microporous membrane, and performing heat setting and rapid high-temperature treatment in sequence. The waterproof breathable membrane is prepared by the described preparation method. The composite fabric is composed of an inner layer fabric, an outer layer fabric, and the waterproof breathable membrane provided by the present invention which is compounded between the inner layer fabric and the outer layer fabric. The preparation method provided by the present invention facilitates industrial promotion and use, and the obtained product possesses excellent waterproof and breathable properties, as well as higher tensile strength and elongation at break.

The invention relates to the field of flame-retardant textile fabrics, and provides a comfortable flame-retardant aramid fabric and a preparation method thereof. The composite filler with the average length of 3.0-8.0 mu m and the diameter of 0.4-1.0 mu m is prepared by adopting the design of multielement blended composite fibers of hydroxyapatite / magnesium hydroxide composite filler, meta-aramid polymer, para-aramid polymer, polybenzimidazole and the like through a hydro-thermal synthesis process of performing silanization surface activation and accurately controlling the molar ratio of calcium to phosphorus to be 1.60-1.67. The preparation method comprises the following steps: preparing the composite filler with the average length of 3.0-8.0 mu m and the diameter of 0.4-1.0 mu m; then industrial production processes such as graded shearing dispersion, continuous wet spinning, multi-stage stretching heat setting and after-finishing are performed, so that synergistic improvement of flame retardant performance and comfort performance is achieved, and the technical problems that a traditional aramid fiber fabric is poor in flame retardant effect, poor in comfort, unstable in processing performance and the like are solved; the fabric has wide application value in high-end application fields such as fire protection clothing, industrial protection textiles and military protection equipment.

The invention discloses a modified ultra-high molecular weight polyethylene fiber as well as a preparation method and application thereof. The modified ultra-high molecular weight polyethylene fiber is prepared from 100 parts by mass of ultra-high molecular weight polyethylene resin, 3-10 parts by mass of modified nano composite ceramic particles, 2-8 parts by mass of modified aramid fiber, 1-5 parts by mass of modified carbon nanotubes and 1-3 parts by mass of an auxiliary agent through the processes of a two-stage blending method, dry-wet spinning, gradient hot stretching, pulse heat setting and the like. The tensile strength of the prepared modified ultra-high molecular weight polyethylene fiber is greater than 4.5 GPa, the elongation at break is kept at 5.0-5.5%, the cutting resistance is as high as 310N, the puncture resistance is as high as 465N, and the modified ultra-high molecular weight polyethylene fiber can be applied to protective products.

The invention relates to the technical field of fiber materials, in particular to a polydopamine modified polypropylene antistatic fiber and a preparation method thereof. The antistatic polypropylene fiber overcomes the problems of poor antistatic effect and mechanical property of the polypropylene fiber. The preparation method comprises the following steps: carrying out step-by-step mixing, melt extrusion, spinning, drafting and heat setting on raw materials such as polypropylene slices, polydopamine modified polypropylene, carbon nanotubes, modified titanium dioxide, modified graphene and the like to obtain the antistatic fiber. The polydopamine modified polypropylene is obtained by modifying polypropylene with dopamine hydrochloride; the modified titanium dioxide is obtained by modifying nano titanium dioxide by using 3-aminopropyltriethoxysilane; the modified graphene is obtained by sulfonating graphene oxide and adding octadecylamine for modification. All the materials and the process cooperate with each other, an antistatic system is constructed on the surface and in the fiber, and meanwhile the mechanical property is improved. The fiber prepared by the method is excellent in antistatic effect and mechanical property, and has a good application prospect.

The invention relates to the technical field of polymer functional material processing, and particularly discloses a polyethylene waterproof breathable film using PTFE micro powder as an opening agent and a preparation method of the polyethylene waterproof breathable film. The waterproof breathable film is prepared from the following components in parts by weight: 50-70 parts of linear low-density polyethylene, 10-40 parts of PTFE (Polytetrafluoroethylene) micro powder, 3-8 parts of a modified compatilizer and an auxiliary agent. The preparation method comprises the following steps: S1, activating PTFE micro-powder by a silane coupling agent and coating the PTFE micro-powder with polyethylene wax to obtain modified micro-powder; s2, uniformly mixing all the components; s3, carrying out melt extrusion at 180-210 DEG C through a double-screw extruder, and carrying out tape casting to form a cast sheet; s4, the casting piece is heated to 90-115 DEG C for two-way stretching, and micropores are formed through interface stripping between the PTFE particles and the base body; and S5, carrying out heat setting at 120-130 DEG C, cooling, and rolling to form the film. Through the synergistic effect of the self-made compatilizer and the pretreatment process, the interface anchoring force is enhanced, the problems of powder falling and water leakage of highly-filled PTFE are solved, and meanwhile, high moisture permeability, high hydrostatic pressure resistance and high mechanical property are taken into account.

The invention belongs to the technical field of fibers, and particularly relates to a spandex fiber for randomly tailoring a fabric and a preparation method and application of the spandex fiber. The spandex fiber is prepared from the following raw materials: isocyanate, modified polyol, a bifunctional compound and a compound additive. The spandex fiber for randomly cutting the fabric has excellent mechanical properties, the strength is 2.01-2.18 d / g, the stress at definite elongation is 13.0-13.7 cN, the elongation at break is 522-557%, efficient heat setting can be met at the temperature of 175 DEG C or below, and the heat setting efficiency is 87-92%; and after heat treatment, the strength is only reduced by about 2%, and the elongation at break is reduced by not more than 10%. The prepared spandex fiber has good adaptability, and when the spandex fiber is blended with cotton, silk, wool and other fibers with poor heat resistance, the fabric made of the spandex fiber has good dimensional stability during cutting, edge curling and thread loosening are avoided, and the spandex fiber can be cut at will.

The utility model relates to the technical field of terylene DTY processing, in particular to a terylene DTY heat setting device which comprises a box body, a plurality of thread rollers are arranged in the box body in a staggered and rotating mode, circular rings are arranged in the positions, on the two sides of the thread rollers, of the box body, and two electric heating pipes are symmetrically fixed to the two circular rings together. Each circular ring is rotationally arranged on the box body, a driving mechanism is fixed on one circular ring, and the driving mechanism is fixed on the box body. When in use, the driving structure drives the two electric heating pipes to rotate in a positive and negative alternating manner through the two circular rings, so that the two electric heating pipes can uniformly heat air around the polyester DTY yarns without influencing the penetration of the polyester DTY yarns in the box body, the polyester DTY yarns are more uniformly heated during heat setting, and the heat setting effect of the polyester DTY yarns is improved. Therefore, the quality and the efficiency of the terylene DTY during heat setting are ensured.

The invention discloses a preparation method of a composite current collector base film based on flame-retardant and aging-resistant modified PP and a composite current collector, the method comprises the following steps: 1) preparation of a modified PP master batch: mixing 100 parts by weight of PP resin, 0.5-1.8 parts by weight of a lubricant and 10-25 parts by weight of a flame-retardant and aging-resistant composite filler, and stirring at 100-135 DEG C for 0.5-2 h to obtain the modified PP master batch; (2) carrying out melt extrusion, tape casting and sheet casting to obtain an intermediate sheet; 3) biaxial stretching; and 4) carrying out heat setting, rolling and slitting to obtain the composite current collector base film. The invention provides the PP base film with excellent flame-retardant and aging-resistant performance and good mechanical strength; furthermore, based on the PP base film, the composite current collector is obtained after copper layers are formed on the two surfaces of the PP base film by adopting a conventional water electroplating process, and the copper layers and the PP base film in the composite current collector have high bonding strength, so that the service life of the composite current collector can be effectively prolonged.

The invention discloses a moisture-absorbing breathable polyamide fiber fabric and a preparation method thereof, and relates to the technical field of polyamide fiber fabrics. The method comprises the following steps: preparing a nano silicon dioxide composite template agent, and blending the nano silicon dioxide composite template agent with chinlon slices to prepare modified master batches; after special-shaped hollow spinning and weaving, a pore-foaming agent is dissolved out through hot water treatment, and a porous structure is constructed in the fiber; then carrying out plasma activation on the fabric, and grafting monomers such as acrylic acid, acrylamide and stearyl methacrylate on the surface and in pores of the fiber by adopting a radiation grafting method to form a hydrophilic-hydrophobic dual-channel structure; then, pre-crosslinked composite particles prepared from chitosan, beta-cyclodextrin and the like are loaded in micropores of the fabric through a vacuum-positive pressure circulation process; and finally, treating by using a finishing liquid containing blocked isocyanate, and carrying out heat setting. The prepared fabric has high moisture absorption rate, large moisture absorption capacity and excellent wet air permeability, is washable and anti-yellowing, and is suitable for high-performance sports and outdoor clothes.

The invention provides a preparation method of acrylate fluoride-free anti-wicking polyester industrial yarns, and belongs to the technical field of polyester fibers. Adding a dispersing agent, a photoinitiator and a reactive diluent into the acrylate prepolymer, fully and uniformly mixing to obtain a fluoride-free oil component, adding the fluoride-free oil component into spinning oil to obtain the fluoride-free anti-wicking oil absorbent, and adding the fluoride-free oil component into the spinning oil according to the adding ratio of 15-20%; the polyester chips are subjected to melt extrusion, cooling and bundling, after one-time oiling is completed, drafting is conducted, a heat setting roller is subjected to two-time oiling through the fluoride-free anti-wicking oil absorption agent, strong ultraviolet light is applied for online curing, winding is conducted, the finished fluoride-free anti-wicking polyester industrial yarn is obtained, the strength of the finished fluoride-free anti-wicking polyester industrial yarn ranges from 7.2 cN / dtex to 8.0 cN / dtex, and the wicking height of the finished fluoride-free anti-wicking polyester industrial yarn ranges from 3 cm to 9 cm.

The present invention provides an automotive wiring harness tape and a preparation method thereof. The wiring harness tape consists of a shielding layer and a rubber coating layer. The shielding layer is prepared from materials such as polyester fiber, nylon fiber, glass fiber, carbon fiber and conductive composite fiber, and has excellent electromagnetic shielding capabilities. The rubber coating layer is formed by mixing an antioxidant, a light stabilizer and silicone rubber, which effectively reduces the VOC release of the tape while ensuring good aging resistance and mechanical properties. The preparation method includes the steps of fiber mixing, heat setting treatment, rubber coating layer preparation and cutting. By precisely controlling the proportion of each component and process parameters, the continuity and stability of the tape are ensured. The automotive wiring harness tape of the present invention not only has excellent electromagnetic shielding performance, but also has good low fogging and mechanical properties, and is suitable for complex automotive electromagnetic environments.

The invention relates to the technical field of phase change materials, in particular to a polyamide elastomer composite fiber and a preparation method and application thereof. The preparation method of the polyamide elastomer composite fiber provided by the invention comprises the following steps: (1) taking a polyamide elastomer as a shell material and a solid-liquid phase change material as a core material, and carrying out coaxial melt spinning and curing to obtain a composite fiber precursor; and (2) sequentially carrying out surface crosslinking, drafting and heat setting on the composite fiber precursor to obtain the polyamide elastomer composite fiber. The polyamide elastomer composite fiber obtained by the preparation method has relatively high phase change enthalpy, relatively high energy storage density and relatively high tensile property, and can be used in temperature-adjusting textiles.

The invention discloses a preparation method of ultra-high molecular weight polyethylene fibers, and belongs to the technical field of high molecular compound compositions and fiber materials, and the preparation method comprises the following steps: adding ultra-high molecular weight polyethylene powder into a solvent, and dissolving to obtain a spinning solution; adding the spinning solution into a double-screw extruder, and blending and extruding to obtain a spinning solution; filtering the spinning solution, extruding through a spinneret plate to obtain cellosilk, extracting, cleaning, drying, stretching and heat-setting the cellosilk, immersing the cellosilk in a glue solution for a period of time, taking out the cellosilk, cleaning and drying to obtain the ultra-high molecular weight polyethylene fiber. According to the preparation method, the fiber yarns are immersed into the glue solution, and the modified nano aluminum oxide / carbon nanotube composite powder is added into the spinning solution, so that the breaking strength and the wear resistance of the polyethylene fiber are remarkably improved.