1006results about "Monocomponent polyamides artificial filament" patented technology

The invention relates to the technical field of textiles, and discloses a cool and washable bio-based nylon 56 fabric and a preparation method thereof. The preparation method of the cool and washable bio-based nylon 56 fabric comprises the following steps: loading modified nano aluminum oxide on modified aluminum nitride microchips to obtain a composite cool material; nylon 56, an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, polypentamethylene guanidine hydrochloride and a composite cool feeling material are subjected to blending extrusion and melt spinning, and then the bio-based nylon 56 fabric is woven. Mixing the composite modified boron nitride and ethanol to obtain finishing liquid; spraying the finishing liquid on one side of the bio-based nylon 56 fabric, and drying to obtain the cool washable bio-based nylon 56 fabric. The cool and washable bio-based nylon 56 fabric disclosed by the invention has excellent cool feeling, antibacterial property, washable property, moisture absorption property and unidirectional perspiration property.

The invention relates to a preparation method of a high-antibacterial hydrophobic polyamide fiber. The preparation method comprises the following steps: carrying out melt extrusion grafting on polyamide, a quaternary ammonium salt monomer, an initiator and an auxiliary agent to prepare quaternary ammonium salt grafted polyamide; and carrying out melt blending on the prepared quaternary ammonium salt grafted polyamide, polyamide, cuprous oxide and polydimethylsiloxane to obtain the high-antibacterial hydrophobic nylon composite material. And spinning the high-antibacterial hydrophobic nylon composite material to obtain the high-antibacterial hydrophobic polyamide fiber. The high-antibacterial hydrophobic nylon composite material prepared by the method disclosed by the invention can realize efficient antibacterial performance, and the high antibacterial hydrophobic performance of the prepared polyamide fiber is improved.

The invention discloses a high-moisture-absorption cool-sense chinlon 6 master batch and a fiber and a preparation method thereof, and belongs to the technical field of chemical fibers. The preparation method comprises the following steps: respectively crushing and grinding chinlon 6 powder, a moisture absorption modifier, cool powder, an antioxidant and a dispersing agent, mixing to prepare mixed powder, and carrying out quantitative feeding, melting and plasticizing, screw transmission and shearing, water-cooling pelletizing, vibration screening and forced air drying to prepare the high-moisture-absorption cool chinlon 6 master batch. The preparation method comprises the following steps: uniformly mixing dried high-moisture-absorption cool-sense chinlon 6 master batches and chinlon 6 slices, metering, mixing, extruding and melting, spraying out through a special-shaped hole spinneret plate to form tows, sucking monomers, bundling, oiling, stretching, sizing, and finally winding and spooling to obtain the high-moisture-absorption cool-sense chinlon 6 fiber. The preparation method disclosed by the invention is simple in process, the moisture regain of the prepared high-moisture-absorption cool-feeling chinlon 6 fiber can reach 5-8%, meanwhile, the high-moisture-absorption cool-feeling chinlon 6 fiber shows cool feeling and good air permeability and comfort, and a woven fabric is soft, skin-friendly and smooth in hand feeling.

The invention discloses a silicon dioxide aerogel chinlon 6 composite fiber and a preparation method thereof, and belongs to the technical field of chemical fibers. The preparation method comprises the following steps: firstly, carrying out surface modification on silicon dioxide aerogel by adopting an alcohol ester method to obtain modified silicon dioxide aerogel powder with improved hydrophobicity, and then uniformly mixing and blending PA6 slices and the silicon dioxide aerogel powder to prepare the silicon dioxide aerogel chinlon 6 composite master batch. And finally, mixing and extruding the silicon dioxide aerogel and chinlon 6 composite master batch and PA6 slices, and carrying out melt spinning to finally prepare the silicon dioxide aerogel and chinlon 6 composite fiber. Hydrophobically modified silicon dioxide aerogel is uniformly dispersed in a chinlon 6 matrix, so that the heat conductivity coefficient of the silicon dioxide aerogel and chinlon 6 composite fiber is remarkably reduced, and the prepared silicon dioxide aerogel and chinlon 6 composite fiber has good light weight, flexibility and wear resistance while keeping high heat retention property; the bottleneck of poor mechanical property of the traditional aerogel composite material is broken through.

Provided is a polyamide resin, which is a copolymer of a biodegradable polyamide, such as polyamide 2 to polyamide 4, and another polyamide, the polyamide resin having enhanced biodegradability. The polyamide resin contains a structural unit represented by Formula (1) and another polyamide structural unit, and a difference between a degree of randomness determined based on a proportion of each structural unit as determined by 1H-NMR measurement when structural units are assumed to have an ideal random sequence and a degree of randomness determined based on a proportion of carbonyl carbon of an amide group linking different structural units with respect to a total peak integrated value for carbonyl carbon as determined by 13C-NMR measurement is 0.10 or less, where in Formula (1), x is an integer of 1 or greater and 3 or less.

The invention belongs to the field of functional textile materials, and provides a cool-feeling anti-ultraviolet nylon fabric and a preparation method thereof, and the cool-feeling anti-ultraviolet nylon fabric adopts a design scheme of combining a boron nitride / titanium dioxide composite filler with a beta-hydroxyl ether type ultraviolet absorption silane coupling agent surface modification technology. Uniform loading of hexagonal boron nitride on the surface of anatase type titanium dioxide is realized through an in-situ heat treatment process, a composite structure with heat conduction and ultraviolet shielding functions is constructed, and a complete process flow of master batch preparation, melt spinning, weaving, after-treatment and the like is matched; the ultraviolet protection coefficient UPF of the fabric is not lower than 40, the UPF retention rate after 20 times of household washing cycles is not lower than 80%, and the cool feeling qmax at the contact moment is not lower than 0.20 W / cm, the technical problem that an existing nylon fabric is insufficient in ultraviolet resistance and cool feeling function is solved, and the fabric has wide industrial application value.

The invention relates to a Janus flexible super fabric capable of dynamically regulating and controlling infrared emissivity as well as a preparation method and application of the Janus flexible super fabric, and belongs to the technical field of high-performance fiber products. In order to solve the problem that the existing fabric capable of dynamically regulating and controlling the infrared emissivity cannot realize stepless wide-range infrared reflectivity dynamic regulation and control, the invention provides a Janus flexible super fabric capable of dynamically regulating and controlling the infrared emissivity, which has a sandwich structure, the hydrophobic nanofiber thin film layer, the low-emissivity coating and the hydrophilic nanofiber thin film layer are sequentially arranged from bottom to top. An anti-gravity unidirectional carrier transfer channel is constructed through surface binding energy difference of hydrophilic-hydrophobic Janus porous fabrics on two sides, a hydrophilic low-emissivity coating with ultralow infrared emissivity and the Janus porous fabrics form a sandwich structure, dielectric constants are adjusted through continuous and reversible change of carrier content, and accordingly, the infrared emission performance of the fabric is improved, and the infrared emission performance of the fabric is improved. Stepless regulation and control of humidity response self-adaptive ultra-wide range infrared emissivity at normal temperature are realized.

The invention discloses a special color master batch for high-efficiency cool chinlon and a preparation method of the special color master batch, and relates to the technical field of functional master batch and resin modification. The invention relates to a special color master batch for high-efficiency cool chinlon. The special color master batch is prepared from the following components in parts by mass: 40-70 parts of carrier resin, 15-25 parts of a cool functional material, 3-10 parts of a dispersing agent, 5-25 parts of pigment, 0.5-5 parts of an auxiliary processing aid and 1.5-1.5 parts of an antioxidant. Oxidation degradation of the color master batch in high-temperature processing and long-term use of the fabric can be effectively inhibited through oxidation resistance, the problems of yellowing, mechanical property reduction and the like are reduced, and the stable service cycle of the color master batch and the fabric is prolonged.

The present invention discloses an antistatic and quick-drying multi-layer composite nylon fabric and a preparation method thereof. The antistatic and quick-drying multi-layer composite nylon fabric sequentially includes, from the outside to the inside: a modified layer, a carbon bead layer, and a moisture absorption layer; the modified layer is prepared by mixing bio-based nylon and modified graphene to obtain a modified graphene nylon fabric, and then blending it into yarn and weaving it; the carbon bead layer is prepared from carbon powder, phenolic resin, nano silver, and a surfactant; the moisture absorption layer is prepared by soaking bio-based nylon in a moisture absorbent, blending it into yarn, and weaving it; when polypropylene / modified graphene fiber modifies the existing bio-based nylon, it not only improves the antistatic resistance but also maintains a relatively high mechanical strength as much as possible. The prepared composite fabric has better antistatic, antibacterial, and moisture absorption properties, effectively solving the problem of the decrease in breaking strength and service performance caused by the improvement of antistatic properties.

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 an anti-ultraviolet spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the anti-ultraviolet spinning yarn is prepared, 2, 4, 6-tri (4-hydroxyphenyl) boroxane and methylphenyl phosphonium chloride are subjected to a reaction, and a phosphorus-boron composite flame retardant is prepared; the preparation method comprises the following steps: polymerizing indole and 5-(aminomethyl) indole to coat the surface of nano titanium dioxide to prepare pre-modified nano titanium dioxide; the pre-modified nano titanium dioxide and (3-acryloyloxypropyl) tri (trimethylsiloxy) silane are subjected to a reaction, and modified nano titanium dioxide is prepared; mixing poly (pentamethylene diamine adipate), the modified nano titanium dioxide and the phosphorus-boron composite flame retardant, and performing melt spinning to obtain polyamide fibers; spinning polyamide fibers to obtain polyamide spun yarns; the polyamide spinning yarn is sequentially finished with the chloroacetic acid finishing liquid and the isoliquiritigenin finishing liquid, and the anti-ultraviolet spinning yarn is prepared. The anti-ultraviolet spinning yarn prepared by the invention has excellent anti-ultraviolet, flame-retardant and anti-static properties.

The invention discloses a preparation process of fiber aramid fiber with high electromagnetic shielding performance, which comprises the following steps: step 1, dissolving an aramid fiber polymer in concentrated sulfuric acid to form a spinning solution; step 2, adding a nano conductive material and a magnetic material into the spinning stock solution, and treating the mixed solution by adopting an ultrasonic-high-speed shearing synergistic dispersion technology for 30-60 minutes; step 3, extruding the mixed solution into a coagulating bath through a wet spinning process, and performing multi-stage stretching, washing and drying to obtain nascent fibers; 4, performing high-temperature heat treatment and plasma surface modification on the nascent fiber to enhance the continuity of the conductive network; and step 5, coating the surface of the fiber with a polydopamine-metal composite layer. The invention belongs to the technical field of high-performance fiber preparation, and particularly provides a preparation process of fiber aramid fiber with high electromagnetic shielding performance, which optimizes filler selection, a dispersion process and fiber structure design, is high in electromagnetic shielding effectiveness, is suitable for a lightweight environment, and is high in environmental adaptability.

The invention relates to the technical field of flocking fibers, and discloses a fiber material for electrostatic flocking of an automobile spring and a preparation method thereof.The preparation method comprises the steps that a diamine monomer and a diacyl chloride monomer are subjected to a polymerization reaction and then react with KH550 modified mesoporous nano-silica, and polyamide modified mesoporous nano-silica is obtained; and finally, blending with nylon 66, melting and spinning to obtain the nylon fiber. The silicon dioxide contains a hollow mesoporous structure, and when sound waves enter the silicon dioxide, the sound waves can be reflected and scattered for multiple times in the internal hollow and pore channels, so that the energy of the sound waves is dissipated, and a good sound absorption effect is achieved. Meanwhile, a polyamide molecular chain grafted on the surface of the silicon dioxide contains a large number of hydrophobic alkyl long chains which are uniformly dispersed in a fiber matrix, so that the hydrophobicity of the fiber matrix can be improved, the water contact angle and the water resistance and waterproofness are improved, and good practical application is achieved in the aspects of electrostatic flocking fibers for automobile springs and the like.

The invention relates to the technical field of antibacterial polyamide fiber preparation, and discloses a polyamide fiber with antibacterial performance and a preparation method thereof.The polyamide fiber is prepared from, by weight, 100 parts of PA6 slices, 10-15 parts of graphene oxide, 1-5 parts of surface amination mesoporous catechin-silver-loaded zirconium phosphate and related auxiliaries, after surface amination mesoporous catechin-silver-loaded zirconium phosphate and graphene oxide are subjected to amide linkage, the surface amination mesoporous catechin-silver-loaded zirconium phosphate and amide groups of polyamide fibers form a hydrogen bond network, the surface amination mesoporous catechin-silver-loaded zirconium phosphate and the amide groups of the polyamide fibers are mutually combined to play a synergistic effect, the interface binding energy is increased, and antibacterial components can stably exist in the polyamide fibers; meanwhile, the mesoporous structure provides multi-channel support, induces cracks to expand along the edge of a pore and increases the length of a fracture path, so that the stress transfer efficiency is obviously improved, and the problem of internal stress concentration caused by the addition of large-particle high-content rigid particles is avoided.

The invention discloses a process method for preparing a multi-component aramid copolymer through continuous polymerization, and relates to the technical field of high polymer material preparation, and the process method comprises the following steps: S1, preparing a premix: weighing one or more aromatic diamine monomers according to a certain mass ratio, dissolving the aromatic diamine monomers in an amide solvent or a solvent compounded by amides and hydrotropy salt, and stirring to obtain the premix; uniformly stirring and dissolving in a reaction kettle under the protection of a nitrogen environment to form a premix; s2, low-temperature pre-polycondensation reaction; s3, low-temperature polycondensation reaction; s4, post-treatment: neutralizing, washing and drying the multi-element aramid polymer powder obtained in S3, and removing the solvent and the hydrotropy salt to obtain pure and uniform-particle brown yellow powder; or the obtained polymerization stock solution is neutralized, defoamed and filtered to obtain a spinning stock solution, the intrinsic viscosity of the processed brown yellow powder or spinning stock solution is larger than 4.5 dL / g, the polymer powder / polymerization solution can be used for preparing the multi-element aramid fiber through spinning, and the method effectively reduces the industrial production cost of the multi-element cyclic aramid fiber and improves the production efficiency.

The invention provides a diaphragm as well as a preparation method and application thereof, and relates to the technical field of lithium ion battery diaphragm materials. The preparation method of the diaphragm comprises the following steps: S1, uniformly mixing a polyamide solution, lithium chloride and a solvent to obtain a spinning solution, and spinning and chopping the spinning solution to obtain polyamide short fibers; s2, dispersing polyamide short fibers, inorganic ceramic particles and auxiliaries in water to obtain water-based coating slurry; and S3, coating a base membrane with the water-based coating slurry, and drying to obtain the water-based composite membrane. The diaphragm provided by the invention has excellent heat resistance, and is helpful for improving the cycle performance and safety performance of the secondary battery.

The invention provides a nano film-coated flame-retardant nylon filament and a preparation method thereof, and relates to the technical field of novel flame-retardant materials. Comprising a component A and a component B. The component A comprises the following raw materials in percentage by mass: 50-85% of polyamide slices; 10 to 40 percent of a melamine compound; 1 to 10% of diethyl phosphinate; 1-10% of a nanometer inorganic substance; 0.5 to 3 percent of antioxidant; and the component B is a polyamide slice. According to the invention, by compounding the melamine compound and the diethyl hypophosphite and combining with the assistance of the nano inorganic matter, the dispersity and the bonding strength of the flame retardant in polyamide are optimized; meanwhile, the nano inorganic matter can construct a compact physical barrier layer, so that the flame-retardant efficiency is improved; and the nano inorganic matter can also improve the thermal stability of the flame retardant, and finally industrial preparation of the nano film-coated flame-retardant nylon filament which has the characteristics of high flame-retardant efficiency and low molten drop and can be produced on a large scale is realized.

The invention discloses a heteroaromatic polyamide fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out polymerization reaction on a raw material system comprising a diamine monomer containing a heterocyclic structure, an aromatic diacyl chloride monomer and a composite solvent to obtain an aromatic heterocyclic polyamide solution; mixing the heteroaromatic polyamide solution with Lewis acid to prepare a spinning solution; the spinning solution is subjected to gel spinning, gel filaments are obtained, the gel filaments enter a coagulating bath to be coagulated and plasticized and stretched, washing, drying and hot stretching are carried out, and the aromatic heterocyclic polyamide fiber is obtained. The heteroaromatic polyamide fiber prepared by the method is compact in structure and high in orientation degree, and the orientation degree is 0.92-0.97; the mechanical property is excellent, the tensile strength is 33-41 cN / dt, and the elongation at break is 4.2%-6.1%. Compared with traditional wet spinning, the method has the advantages of high spinning speed and high production efficiency, and is suitable for industrial production.

The invention provides epoxy group-containing fluorosiloxane and application thereof in improvement of nylon / polyester performance, and belongs to the technical field of new materials. According to the technical scheme, the epoxy modified polysiloxane auxiliary agent is synthesized. Polysiloxane has excellent high and low temperature resistance, wear resistance, lubricating property, weather resistance and the like. After epoxy modification, an epoxy group on a molecular chain can be subjected to a chemical chain extension reaction with an amino-terminated group and a carboxyl-terminated group in molecular structures of materials such as PA6 / PA66 / PET. The reaction not only improves the viscosity of the to-be-modified molecules, but also significantly improves the processability and low-temperature flexibility of the to-be-modified molecules. Meanwhile, the compatibility of polysiloxane and molecules to be modified is increased due to the introduction of the epoxy group, so that the synthesized epoxy modified polysiloxane cannot be separated out in a system, the stability of the material performance is ensured, and the effective modification of the nylon / polyester performance is realized.

The invention discloses a thermal antistatic fabric based on polyamide fibers and a preparation method thereof, and relates to the technical field of textile fibers. When the thermal antistatic fabric based on the polyamide fiber is prepared, caprolactam, a flame retardant and hexamethylenediamine react to prepare pre-modified polyamide; the pre-modified chinlon and 3-chloro-1-propanethiol are subjected to a reaction, and modified chinlon is prepared; the preparation method comprises the following steps: sequentially reacting graphene oxide with mercaptopropyltrimethoxysilane and 2-(2H-benzotriazole-2-yl)-4-methyl-6-(2-propenyl) phenol, so as to obtain modified graphene oxide; the modified chinlon and the modified graphene oxide are mixed and then subjected to melt spinning, and modified chinlon fibers are obtained; and twisting the modified polyamide fiber, spinning, and post-processing to obtain the thermal antibacterial fabric based on the polyamide fiber. The warm-keeping antistatic fabric based on the polyamide fiber has good warm-keeping, antistatic, flame-retardant, anti-aging and mechanical properties.

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 provides a multifunctional aerogel fiber based on a waste firefighter uniform fabric and a preparation method thereof, and belongs to the technical field of textile material recovery. The method comprises the following steps: separating aramid fiber 1313, aramid fiber 1414 and conductive fiber from the waste firefighter uniform; dissolving step by step, and compounding with sulfonated MXene to prepare a spinning solution; forming a gel fiber precursor through wet spinning, and spirally winding and stranding; performing supercritical carbon dioxide treatment to construct a porous structure; and finally coating a functional skin layer. Spiral winding stranding is adopted to replace traditional parallel stranding, interface micro-fusion is generated in combination with supercritical carbon dioxide, and mechanical interlocking and hydrogen bond strengthening between fibers are synchronously achieved; the continuity of the conductive network is enhanced through sulfonated MXene modification, and the solvent system difference is avoided through beam splitting spinning. The prepared aerogel fiber has the characteristics of high strength, high conductivity and high temperature resistance, and solves the problems of poor interface bonding and single function of various fibers in the waste firefighter uniform.

The invention relates to the technical field of layered composite fabrics, in particular to a flame-retardant-fiber-based multilayer flame-retardant composite fabric for an aircraft cabin and a preparation method of the flame-retardant-fiber-based multilayer flame-retardant composite fabric. The preparation method comprises the following steps: reacting acrylic acid with DOPO to prepare modified DOPO; reacting the epoxy POSS with the modified DOPO to prepare a composite flame retardant; reacting the hydrophilic grafted polyamide with a composite flame retardant and amino-modified nano-montmorillonite to prepare modified polyamide; carrying out melt spinning and chopping on the modified polyamide to obtain flame-retardant fibers; the flame-retardant fibers are spun into flame-retardant yarns, then the flame-retardant yarns are spun into a fabric, and a surface fabric is obtained; the flame-retardant fibers and the polyester fibers are blended to obtain blended yarns, and then the blended yarns are spun into a fabric to obtain a bottom layer fabric; and compounding the surface layer fabric and the bottom layer fabric to obtain the composite fabric. The prepared composite fabric has excellent flame retardant property and antistatic property, and can be applied to aviation cabins.

The invention relates to the technical field of fibers, and discloses a thermal insulation polyamide fiber and a preparation method thereof. Polyurethane modified silicon dioxide aerogel with a phase change unit and a heat insulation carrier is prepared, the polyurethane modified silicon dioxide aerogel and epoxidized carbon nanotubes with light absorption and heat generation performance are jointly introduced into PA6 slices, epoxy groups react with carboxyl and amino at the tail end of a PA6 main chain under the melting condition, the dispersity and compatibility of all components in the PA6 slices are improved, and the heat insulation performance of the PA6 is improved. The polyamide fiber prepared by melt spinning not only has good heat insulation performance, but also can utilize the phase change material and the light absorption heating material to store energy and regulate temperature, so that the heat storage and heat preservation performance of the fiber is further improved.

The invention relates to a method for preparing polyamide 6 fine denier fibers through anionic polymerization. Caprolactam and a catalyst are added into a drying device A to remove system moisture and then placed in a storage tank A. Caprolactam is added into a drying device B to remove moisture and then placed in a storage tank B together with an initiator and a cyclic oligomer inhibitor. Caprolactam liquid in the storage tank A and the storage tank B is continuously injected into a screw extruder for anionic ring-opening polymerization reaction to prepare a polyamide 6 basic melt, the basic melt is further conveyed to a tandem devolatilization reaction system to remove monomers and part of cyclic oligomers to obtain a polyamide 6 final polymer, and finally, the polyamide 6 final polymer can be directly spun. The polyamide 6 fine denier fiber is obtained.

The utility model relates to a profiled fiber, and relates to the technical field of fibers. The profiled fiber comprises a flat sheet type fiber, and the profiled fiber is prepared from a high polymer melt with high viscosity. According to the profiled fiber, the cross section shape of the fiber is changed, and the specific surface area of the fiber is greatly increased, so that the profiled fiber has a relatively strong cool feeling effect.

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 relates to the technical field of aramid fiber materials, in particular to an anti-aging para-aramid fiber and a preparation method thereof.The preparation method comprises the steps that S1, UV-234 and concentrated sulfuric acid react to obtain a first reactant; s2, the first reactant and the second reactant PPTA are subjected to a blending reaction, and a spinning solution is obtained; and S3, carrying out a dry-jet wet spinning process on the spinning solution to obtain the anti-aging para-aramid fiber. In the step S1, the concentration of the concentrated sulfuric acid is 99.8-101% according to the content of SO3; the dosage of the UV-234 is 0.25%-2.5% of the mass of the concentrated sulfuric acid; in the step S2, the mass ratio of the first reactant to the second reactant PPTA is (4-4.13): 1. According to the anti-aging para-aramid fiber prepared by the preparation method, the anti-aging performance of the fiber is remarkably improved while relatively high strength is maintained, and the preparation method is simple and suitable for industrial application.

The present invention belongs to the field of functional fiber technology and relates to a UV-resistant aramid fiber and its preparation method. During preparation, a KZW polymer solution and a MAF polymer solution are uniformly mixed as a spinning solution, and then wet-dry spinning is performed to produce the UV-resistant aramid fiber. The UV-resistant aramid fiber has a fineness of 1 to 5 dtex and a density of 1.4 to 1.6 g / cm³. The UV-resistant aramid fiber has a UPF value of 60 to 100 and a UV transmittance of 1% to 3%. After 100 hours of UV irradiation, the UV-resistant aramid fiber has a breaking strength retention rate of 97 to 99% and an elongation retention rate of 95.8 to 98.6%. The UV-resistant aramid fiber of the present invention not only has UV aging resistance but also synergistically enhances its interfacial bonding strength, thermal stability, and durability. The preparation method is simple and easy to implement.

The invention discloses a water-repellent warm-keeping chinlon 6 hollow fiber and a preparation method thereof, and belongs to the technical field of functional fiber materials. The preparation method comprises the following steps: preparing a water-repellent master batch from a fluorine-containing acrylic copolymer, polysiloxane, hydrophobic nano silicon dioxide, a chinlon 6 slice and an antioxidant, melting the water-repellent master batch and the chinlon 6 slice by adopting a melt spinning method, and spinning through an annular spinneret plate hole formed by two C-shaped grooves, so as to prepare the water-repellent warm-keeping chinlon 6 hollow fiber. The fiber has water repellency and heat preservation performance, is soft in texture, capable of absorbing sweat, quick to dry, light in weight, capable of keeping warm, good in water repellency effect and long in waterproof time, and has wide application prospects in the aspect of preparation of outdoor sportswear and high-cold waterproof clothes.