630results about "Monocomponent polyamides artificial filament" patented technology

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 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 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 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 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 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 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.

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 relates to an antibacterial and wear-resistant textile fabric and a preparation method thereof, and belongs to the technical field of textile fabrics, the antibacterial and wear-resistant textile fabric is formed by spinning antibacterial and wear-resistant yarns, and the antibacterial and wear-resistant yarns are formed by winding and twisting wear-resistant fibers on antibacterial fibers; wherein the wear-resistant fiber is prepared from the following raw materials in parts by weight: 10 to 20 parts of silkworm excrement, 5 to 10 parts of rosin, 3 to 8 parts of volcanic rock particles and 50 to 60 parts of bio-based nylon 66 particles; the antibacterial fiber is prepared from the following raw materials in parts by weight: 30-35 parts of natural plant ash, 10-15 parts of Chinese soapberry fruit extract and 60-70 parts of polytetrafluoroethylene particles. The antibacterial and wear-resistant yarn is made into the antibacterial and wear-resistant textile fabric by intertwisting wear-resistant fibers and antibacterial fibers, silkworm excrement and rosin are added into raw materials for preparing the wear-resistant fibers, the wear resistance of the wear-resistant fibers can be improved, and organic matter contained in the silkworm excrement can improve the viscosity of the rosin; the wear-resistant fiber obtained by processing has good wear resistance.

The invention relates to the technical field of functional fibers, and particularly discloses a chinlon BI fiber with an anti-allergy function prepared by using a molecular nest technology, which is prepared from the following raw materials in parts by weight: 100-300 parts of chinlon chips, 15-30 parts of molecular nests containing plant active ingredients and 1-7 parts of a dispersing agent, the molecular nest containing the plant active ingredients is obtained by loading a calendula extract, a liquorice extract and a green tea extract on sulfonated mesoporous silica, and the sulfonated mesoporous silica can stably adsorb the plant active ingredients, so that carbonization inactivation caused by high temperature of spinning due to direct addition of natural active ingredients is avoided; therefore, the chinlon BI fiber disclosed by the invention has an anti-allergy function, and is remarkable in antibacterial and antioxidant activity and wide in market application prospect.

The invention provides a long-acting antibacterial chinlon composite fiber and a preparation process thereof, and belongs to the technical field of composite fibers. The preparation process comprises the following steps: preparing the modifier; preparing modified graphite; preparing the antistatic modified polyamide fiber; preparing an antibacterial treatment solution; and preparing the chinlon composite fiber. Cyanuric chloride and N, N-dimethyl propane diamine react to generate an intermediate, then the intermediate and 1, 3-propane sultone react to generate an antibacterial agent, the antibacterial agent is prepared into an antibacterial treatment solution, and after the antibacterial treatment solution is added into the pretreated antistatic modified polyamide fibers, the antibacterial agent can be connected to the surfaces of the fibers, so that the antistatic property of the fibers is improved. The anti-static modified polyamide fiber has better washing-resistant and antibacterial properties by adding the antibacterial agent into the polyamide fiber, and then the washing-resistant and antibacterial properties of the antibacterial agent can be further improved after bond energy is enhanced through heat treatment, so that the prepared polyamide composite fiber has a long-acting antibacterial effect.

The invention relates to the technical field of high polymer materials, in particular to an anti-aging thread gluing material and a preparation process thereof. Comprising the following steps: preparation of aluminum-doped zinc oxide, tannic acid modified aluminum-doped zinc oxide, ferulic acid modified nylon fiber and modified nylon master batch preparation of the thread gluing. According to the invention, groups of tannic acid and aluminum ions and zinc ions of aluminum-doped zinc oxide are driven by heat energy of a reflux reaction to simultaneously generate chelation-dehydration condensation to form a five-membered ring chelate, so that a compact coating layer is formed on the surface, and the coating layer is simple in component and has very stable chemical bonds; the ultraviolet light stability of aluminum-doped zinc oxide is enhanced, the layer can generate hydrogen bond / pi-pi interaction with nylon amido bonds, the interface bonding strength is improved, the particle size is kept at the level of no filter pressure fluctuation in the spinning process, and the volume resistivity of nylon fibers is reduced.

The invention relates to the technical field of para-aramid dyeing, in particular to a para-aramid colored fiber preparation method, which comprises: uniformly dispersing a coloring pigment in concentrated sulfuric acid to form a coloring liquid, and uniformly dispersing a spinning polymer in concentrated sulfuric acid to form a spinning stock solution; mixing part of the spinning solution with the coloring solution to form a pigment spinning solution; the pigment spinning solution is mixed with the remaining spinning stock solution to form a colored spinning solution, the colored spinning solution enters a spinneret plate to be subjected to dry-jet wet spinning, then the colored spinning solution is subjected to coagulating bath, alkali washing and water washing and then dried, and the para-aramid colored fiber is prepared; wherein in the air bath process of dry-jet wet spinning, the temperature is controlled to be 50-90 DEG C, and the relative humidity is 40-70%. According to the preparation method of the para-aramid colored fiber, uniform and stable distribution of pigments in the fiber is facilitated, and when color systems are replaced in production, the cleaning time of equipment and pipelines can be effectively shortened, raw material waste is reduced, and the production cost is reduced.

The invention discloses a production method of a cool-feeling antibacterial PA66 chinlon filament, and belongs to the technical field of chemical fiber manufacturing. According to the method, PA66 slices are used as raw materials and matched with jade cool-feeling master batches and a septol antibacterial oil agent (the effective component is OPHB), and the PA66 polyamide filament with the cool-feeling antibacterial effect is prepared through the process steps of slice and master batch mixing, melt spinning, side blowing cooling, oiling, drafting and winding and the like. The cool-feeling antibacterial PA66 chinlon filament produced by the invention not only has excellent physical properties (the fineness is 40-50 dtex, the breaking strength is greater than or equal to 3.5 cN / dtex, and the elongation at break is 36-46%), but also has long-acting antibacterial property (the antibacterial rate to escherichia coli and staphylococcus aureus is greater than or equal to 99%, and the antibacterial rate after 50 times of washing is still greater than or equal to 98%) and stable cool feeling (the cool feeling value Q-max is greater than or equal to 0.2 W / (m.K)), and is safe, non-toxic, environment-friendly, simple in process and low in cost. The method is suitable for the field of close-fitting textiles such as warp knitting, weft knitting and hosiery knitting, and the industrial applicability is high.

The invention relates to a temperature-regulating chemical fiber as well as a preparation method and application thereof, and belongs to the technical field of fibers. The temperature-regulating chemical fiber comprises the following components: a fiber-forming polymer and a phase-change material, the phase change material comprises polyimide-modified carbon nanotube composite aerogel and a polyethylene glycol phase change raw material, the polyimide raw material monomer comprises a carboxyl side group functional group. By utilizing the characteristic of large specific surface area of the prepared polyimide-modified carbon nanotube composite aerogel, the phase-change material is adsorbed in holes by virtue of a capillary effect, so that the phase-change material is not easy to leak, and the phase-change material is obtained. The high stability and high thermal conductivity of the porous material further improve the application performance of the composite material. Moreover, the introduction of polyimide side chain carboxyl and modified carbon nanotubes is beneficial to formation of hydrogen bonds with polyethylene glycol phase change raw materials, so that leakage of the phase change raw materials is further prevented, and the stability of the phase change raw materials is improved.

The invention provides a composite solid electrolyte based on a porous meta-aramid nanofiber membrane and a fluorinated metal organic framework. A preparation method of the composite solid electrolyte comprises the following steps: preparing a porous poly (m-phenylene isophthalamide) nanofiber membrane; the fluorinated metal organic framework is prepared through two-step heat treatment synthesis and fluorination modification; and finally, coating the nanofiber membrane with a polymer electrolyte matrix comprising a fluorinated metal organic framework, polyethylene oxide and lithium salt to prepare the composite solid electrolyte. Through the synergistic effect of the porous polyisophthaloyl metaphenylene diamine nanofiber membrane and the fluorinated metal organic framework, while the mechanical strength and dendritic crystal inhibition capability of the composite solid electrolyte are remarkably improved, lithium ion transmission is effectively promoted, and the interface impedance is reduced; the prepared composite solid electrolyte is suitable for preparing a solid lithium metal battery with high safety and high performance.

The invention relates to the technical field of high polymer materials and synthetic fibers, and particularly discloses a high-wear-resistance polyamide fiber and a preparation method thereof. The fiber is prepared by taking polycaprolactam as a matrix, compounding spherical nano silicon carbide and molybdenum disulfide nanosheets as wear-resistant components, taking a maleic anhydride grafted hydrogenated styrene-ethylene-butadiene-styrene block copolymer as an interface compatilizer, and taking hyperbranched polyamide-amine as a dispersing agent. The polyester fiber is prepared through the processes of master batch preparation, melt spinning, multi-stage hot drafting and relaxation heat setting. Through the synergistic effect of all the components and the optimization process, the wear resistance of the fiber is remarkably improved, and meanwhile, the common problems of toughness reduction and fatigue resistance deterioration in high-wear-resistance modification are effectively solved. The polyamide fiber is tough and durable, is specially used for manufacturing high-safety-requirement products such as mountaineering ropes, rescue ropes and industrial lifting belts, and can reduce the fracture risk in repeated use and guarantee the use safety.

The invention belongs to the technical field of preparation of composite fibers, and particularly relates to a preparation method of a heterocycle-containing polyamide composite fiber, which comprises the following steps: under the protection of inert gas, mixing a heterocycle-containing diamine monomer and terephthaloyl chloride in a polar solvent in proportion to prepare heterocycle-containing polyamide; mixing the amino modified cellulose nanomaterial, a tannic acid modified metal oxide and a Schiff base oligomer to form a composite dispersion liquid, adding heterocycle-containing polyamide, a lithium salt and a cross-linking agent into the composite dispersion liquid, dissolving and defoaming to obtain a spinning solution, and extruding the spinning solution into a coagulating bath through wet spinning; and carrying out multi-step washing, drying and heat setting treatment to obtain the heterocycle-containing polyamide composite fiber.

The invention provides a porous conductive fiber, an intelligent fabric and a preparation method thereof, and belongs to the technical field of intelligent fabrics. The preparation method of the porous conductive fiber comprises the following steps: preparing a spinning solution from a conductive material, a thermoplastic elastomer and a template agent, and preparing the porous conductive fiber by combining a spinning method and a sacrifice template method; the conductive material is selected from at least one of a graphene material, an MXene material, a carbon nanotube material and a metal organic framework material; the template agent is selected from at least one of sodium chloride, cube sugar, starch, Janus particles, colloidal silica oxide, cellulose and polymethyl methacrylate. The porous conductive fibers and the hydrophobic elastic porous fibers are woven and integrated into the intelligent fabric. The porous conductive fiber prepared by the invention has relatively high strength, a wide stretching range and relatively high toughness; the intelligent fabric has good self-powered sensing performance, air permeability, washing resistance, cycle durability and one-way wet permeability, and can be worn by a human body and used for detecting human motion.

The invention discloses an antistatic flame-retardant fiber and a preparation method thereof, and relates to the technical field of functional textile materials. When the antistatic flame-retardant fiber is prepared, the multi-walled carbon nanotube is carboxylated to prepare the modified multi-walled carbon nanotube; carrying out surface free radical polymerization on the modified multi-walled carbon nanotubes and caprolactam to obtain modified polyamide 6 slices; the modified polyamide 6 is sliced and spun, and modified polyamide 6 fibers are prepared; the preparation method comprises the following steps: respectively reacting phytic acid and 2, 3-epoxypropyl trimethyl ammonium chloride with chitosan to prepare a polyanion / cation modified chitosan solution; the modified polyamide 6 fiber is alternately soaked in two modified chitosan solutions, and is treated by cocamidopropyl betaine to prepare the antistatic flame-retardant fiber. The antistatic flame-retardant fiber prepared by the invention has excellent antistatic property, flame retardance and mechanical strength.

The application discloses a high-efficiency cool-feeling special color master batch for nylon and a preparation method thereof, and relates to the technical field of functional master batches and resin modification. The high-efficiency cool-feeling special color master batch for nylon is prepared from the following components in parts by mass: carrier resin 40-70 parts, cool-feeling functional material 15-25 parts, dispersing agent 3-10 parts, pigment 5-25 parts, auxiliary processing aid 0.5-5 parts, and antioxidant 1.5-1.5 parts. The antioxidant can effectively inhibit the oxidative degradation of the color master batch in high-temperature processing and long-term use of the fabric, reduces problems such as yellowing and mechanical property reduction, and prolongs the stable use period of the color master batch and the fabric.

The invention relates to the technical field of high polymer materials, and particularly discloses modified polyamide, an acid dyeable nylon 66 fiber as well as a preparation method and application of the acid dyeable nylon 66 fiber. The acid dyeable nylon 66 fiber disclosed by the invention has in-situ leveling property, modified monomers, adipic acid and hexamethylenediamine are polymerized to obtain modified polyamide, then the modified polyamide is prepared into pre-oriented yarns, and the pre-oriented yarns are elasticized to obtain the acid dyeable nylon 66 fiber. The ionic group of the modified monomer has an in-situ retarding effect in the nylon 66 fiber and is not combined with a dyeing seat, and an excellent level dyeing effect and a high dye uptake can be obtained without using a leveling agent. The addition amount of the modified monomer is small, the molecular size of the modified monomer is similar to that of adipic acid and hexamethylenediamine monomers, adverse effects on a polymerization process and a nylon 66 molecular structure are small, and the prepared acid dyeable nylon 66 fiber has excellent mechanical properties. The preparation cost of the acid dyeable nylon 66 fiber is low, the process is simple and convenient, and the acid dyeable nylon 66 fiber has a wide application prospect.

The application belongs to the technical field of nylon industrial yarn, and particularly relates to a nylon industrial yarn for airbag and a preparation method thereof. The preparation method of the nylon industrial yarn is as follows: taking nylon 66 salt and benzotriazole-phosphate derivative as raw materials, under the action of sodium hypophosphite, polycondensation is carried out to obtain modified nylon 66 chip, and then the nylon industrial yarn is prepared through melt spinning; the nylon industrial yarn is prepared by one-step direct polymerization, which can effectively avoid the problem of the decline of the comprehensive performance of the finished product nylon 66 caused by the flame-retardant modification, and the preparation process is simple and convenient for production; the prepared nylon industrial yarn has good strength, aging resistance and flame retardance, and has great market application value in the field of automobile airbag.

Disclosed is an artificial turf fiber (204, 502-510, 804, 902-906, 1500, 1602-1618) comprising a longitudinal cross-sectional profile, the artificial turf fiber being under internal stress that causes the artificial turf fiber, upon receiving heat treatment, to assume a helical shape, wherein the core of the fiber consists of or predominantly comprises a core polymer, and wherein the periphery of the fiber consists of or predominantly comprises a cladding polymer, wherein the core polymer and the cladding polymer are different polymer materials, and wherein the core and cladding polymers are selected such that the core polymer undergoes greater shrinkage than the cladding polymer when subjected to the heat treatment.

The invention relates to the technical field of bio-based polyamide modification, and discloses a bio-based polyamide modified raw material composition for improving the surface hairiness distribution of bunchy yarn, which comprises the following components in percentage by mass: 2.5-6.0% of bio-based polyamide 1010 resin, 0.5-2.0% of maleic anhydride grafted castor oil polyether with the weight-average molecular weight of 3500-5500g / mol, 0.5-2.0% of maleic anhydride grafted castor oil polyether with the weight-average molecular weight of 3,500-5,500 g / mol, 0.5-2.0% of maleic anhydride grafted castor oil polyether with the weight-average molecular weight of 3,500-5,500 g / mol, the functional components are driven to migrate to a surface layer and generate interface secondary bonding by utilizing reaction activity and temperature drop rate coupling among the components and a temperature drop rate difference generated corresponding to an axial variable cross section of the slub yarn, and a thickness heterogeneous interface layer is spontaneously constructed at slubs and details; the technical contradiction that a homogeneous modified material cannot be matched with a non-uniform thermal field is solved, and the physical integrity of the fiber surface is improved.

The disclosed subject matter relates to methods for the dispersion processing of high aspect ratio nanomaterials, such as boron nitride nanotubes, into macrostructures. For example, the disclosed subject matter relates to boron nitride nanotube fibers and films, and methods of making and use thereof. In some examples, the methods are surfactant-free and / or sonication-free.

This polyamide multifilament has a total fineness of 4-100 dtex, a single filament fineness of 1.1-5.0 dtex, a strength-elongation product of 4.5-10.0 cN / dtex, a flatness (b / a) expressed by a major axis b and a minor axis a in a single filament cross section of 6.1-15.0, and a flatness CV value of 2.0 or less. Provided is a polyamide multifilament having a flat cross-section and excellent practical durability of a knitted material or textile for clothing, and having a soft texture and an excellent aesthetic appearance.

[Summary] The present invention provides a compact package of buckled crimp yarn having high bulkiness, an inexpensive and safe manufacturing method thereof, and a manufacturing apparatus therefor. That is, it is possible to produce a releasable buckled crimp fiber cake from a high-speed extruded fiber using simple equipment without winding. Since buckled crimp is imparted to said spinning fiber at the same time as solidification, a robust and bulky crimp is imparted. Moreover, since the fiber is compressed into a cake shape in a filament-opened state, compactness of packages and bulkiness of the opened filaments are achieved all at once. Meanwhile, in a traditional buckled crimp imparting method, the crystal structure of a fiber once fixed in a flat yarn state tends to remain, and it is difficult to improve its bulkiness and fastness. Since a winder is not used in the present invention, the equipment is simple, and it is easy to produce many kinds of product in small quantities. Further, in the package according to the present invention, since fibers are laminated in a columnar shape and can be divided along the lamination surface at an arbitrary portion, there is no need for rewinding for subdividing the package. Incidentally, although flat yarn cannot be obtained by the method of the present invention, the versatility of the resulting fiber is not impaired due to the fact that it is inherently crimped, as is the case with wool and cotton yarn. [Problems] With conventional technology, obtaining buckled crimp yarn from a spinning raw material required tedious processes such as spinning, winding, unwinding, buckled crimp processing, and rewinding. In other words, winding requires a high-speed winder and an associated automatic package switching device, and it was not easy to create an inexpensive and safe facility, or to create a facility that is flexible enough to be suitable for small-lot, high-mix production. Moreover, a fiber that has been drawn using rollers goes through a process where it is temporarily fixed as flat yarn. Therefore, even if it is later buckled crimped, the resultant final product is likely to revert to a crystalline structure that was created on the way of the process, making it difficult to obtain a fiber with a robust buckled crimp in terms of yarn quality. Furthermore, with conventional spool-type packages, it is difficult to achieve both compactness of packages and bulkiness of released yarn. [Solution] A fiber-forming fluid is extruded from a spinneret and ejected with a pressurized gas through a narrow hole positioned opposite to the spinneret; and the resultant fiber is made into a rod of fiber having a buckled crimp in a crimping zone provided at the end of said narrow hole; and the rod of fiber is sent and accumulated into a compressing chamber comprising a reverse funnel-like section and a hollow cylindrical section, and a releasable buckled crimp yarn cake is produced by vibrational compression from the downstream side of said compressing chamber.

The application belongs to the field of functional materials, and particularly relates to a flow core nanoflower / polymer composite fiber membrane, a triboelectric electrode, a triboelectric device and preparation and application thereof. The flow core nanoflower / polymer composite fiber membrane is a fiber membrane material formed by interlacing and weaving of functional nanofibers. The functional nanofibers include polymer fibers and flow core nanoflowers dispersedly distributed in the polymer fibers. The polymer in the polymer fibers is a positive polymer or a negative polymer. The flow core nanoflower is a flower-shaped nanoparticle, which includes a gallium-indium composite oxide shell with a corrugated surface and a gallium-indium alloy core in a flow state filled in the shell. The application innovatively disperses the nanoflowers with a special flow core structure in the polymer fibers, so that the interface adaptability of the material can be changed, the application requirements of the triboelectric device can be met, and the triboelectric performance can be improved.