787 results about "Polyamide fibers" patented technology

The present invention addresses the problem of providing a pneumatic tire in which a reduction in tire performance is mitigated despite using polyamide fibers with low amide density. The solution is a pneumatic tire characterized by comprising a carcass layer (50), belt layers (60A, 60B), and a belt reinforcement layer (70A), wherein reinforcing cords (50-1, 70A-1) in the carcass layer (50) and / or the belt reinforcement layer (70A) contains polyamide fibers having an amide density of 14.0 or less, and (i) when a gauge thickness A from the outer circumferential surface on the tire inner-surface side of the reinforcing cords (50-1) of the carcass layer (50) to the tire inner surface is measured at 100 equally spaced points, the average of the gauge thickness A is 1.5 mm or less, or (ii) when a gauge thickness D from the outer circumferential surface on the tire outer-surface side of the reinforcing cords (70A-1) of the belt reinforcement layer (70A) to the tire outer surface is measured at 100 equally spaced points, the gauge thickness D is 6.0 mm or less at 80% of the measurement points or more.

The invention relates to the field of textile materials, and provides an antibacterial breathable yarn obtained by blended spinning of polyester fibers, polyamide fibers, cotton fibers and elastic fibers. The polyester fiber is prepared through melt blending and spinning processes and comprises polyethylene glycol terephthalate slices, modified chitosan zinc oxide, an antioxidant 1010, a POE elastomer, polyether modified silicone oil and polyethylene glycol 200, and the modified chitosan zinc oxide is prepared by compounding chitosan cinnamyl aldehyde Schiff base and silane modified zinc oxide. The chitosan cinnamyl aldehyde Schiff base is prepared through a Schiff base condensation reaction of chitosan and cinnamyl aldehyde, and the silane modified zinc oxide is prepared from nano rod-shaped zinc oxide particles modified by isocyanate propyl triethoxy silane. The yarn has excellent antibacterial property, air permeability and flexibility and is further used for knitting antibacterial breathable socks, the knitting density of the sock bottom part is reduced to enhance the air permeability, the knitting density of the sock opening part is improved to improve the elasticity and the fitting degree, and the yarn has wide application value.

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention provides a high-strength, light and supercritical foaming fabric and a preparation method thereof, complete fibers used by the fabric comprise core layer fibers and a skin layer material, the outer side of the core layer fibers is uniformly coated with the skin layer material, and the skin layer material can be foamed; the core layer fiber is at least one of aramid fiber, polyarylate fiber, polyimide fiber, ultra-high molecular weight polyethylene fiber, polyester fiber and polyamide fiber; and the skin layer is made of thermoplastic elastomer resin. The preparation method comprises the following steps: uniformly coating the outer side of the core layer fiber with the skin layer material, and then carrying out supercritical foaming on the skin layer material. According to the invention, the contradictory technical requirements of the fabric for shoes on strength, light weight, comfort and the like are solved in a simple mode; the body strength of the fiber for the shoes can be kept, and the characteristics of light weight and air permeability of the foaming fabric are also achieved; the difficulty of direct foaming of the fabric / fiber for shoes is reduced, and the vamp fabric and the shoe article which are uniform in foaming, breathable, light in weight, high in strength and soft can be obtained.

The invention discloses a heat insulation fabric and a preparation method thereof, and relates to the technical field of fabrics. The thermal insulation fabric is prepared by using a magnetic field to assist wet spinning of the modified silicon dioxide aerogel and the polyamide fiber and then oxidizing the acrylic acid at a high temperature; firstly, nano titanium dioxide is prepared through catalysis of modified polyurethane, the mechanical property of silicon dioxide aerogel is improved, and nano titanium dioxide has an excellent anti-ultraviolet effect and can further improve the heat insulation performance of the fabric; secondly, applying a magnetic field to assist the modified silicon dioxide aerogel and the polyamide fiber in wet spinning, and then decomposing acrylic acid at high temperature; the appearance of the nano titanium dioxide can be adjusted by applying a magnetic field, and the ultraviolet protection effect is improved; after the acrylic acid is decomposed, slender nano grooves and holes are left in the fabric, and the slender nano groove structure can increase the contact area between fibers and increase the heat transfer path, so that the fabric has an ultralow heat conductivity coefficient and achieves the effects of heat insulation and ultraviolet prevention.

The invention relates to the technical field of optical cable material preparation, and discloses a nano-modified polyethylene optical cable sheath material and a preparation method thereof.The nano-modified polyethylene optical cable sheath material is prepared from, by weight, 80-100 parts of high-density polyethylene, 25-40 parts of EVA resin, 10-15 parts of modified nylon fibers, 5-8 parts of a composite flame retardant, 0.1-1 part of an antioxidant, 0.1-2 parts of a coupling agent and 0.5-5 parts of a lubricant; the modified nylon fiber is a modified molybdenum disulfide reinforced polyamide 6 fiber, and the modified molybdenum disulfide is formed by grafting nano silicon dioxide after modifying dopamine on the surface of molybdenum disulfide; the composite flame retardant is a core-shell flame retardant which takes magnesium-aluminum double hydroxide as a core and a maleic anhydride grafted styrene-ethylene-butadiene-styrene block copolymer as a shell, and a P-N flame retardant is distributed in the core shell. The polyethylene optical cable sheath material is endowed with good mechanical property and flame retardant 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 relates to the technical field of wastewater resourceful treatment, in particular to a functional membrane for recycling precious metals in wastewater and a preparation method of the functional membrane. The specific preparation method comprises the following steps: preparing a polyamide spinning solution, carrying out electrostatic spinning on the spinning solution to form a polyamide fiber net, stably combining hollow mesoporous nano silicon dioxide on the fiber net through carboxymethyl chitosan, and grafting an epoxy silane coupling agent on the surface of the hollow mesoporous nano silicon dioxide to obtain the hollow mesoporous nano silicon dioxide fiber net. Finally, adipic dihydrazide is grafted on the hollow mesoporous nano silicon dioxide through a ring-opening reaction. Organic polyamide is used as a film forming substance, the raw material cost is low, the method is suitable for large-scale industrial production, the recovery rate of precious metal ions is high, and the film body has good mechanical strength and can stably operate for a long time.

The invention relates to the technical field of multi-layer composite fabrics, and discloses a moisture-absorption antibacterial layered composite fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out melt spinning on polyamide and an antibacterial agent to prepare the antibacterial polyamide fiber; blending antibacterial polyamide fibers, cotton fibers and special-shaped section polyamide fibers, and knitting to obtain a lining fabric crude product; blending the antibacterial polyamide fiber and the modified cotton fiber, and knitting to obtain a surface fabric crude product; respectively padding the surface fabric crude product and the lining fabric crude product in the finishing liquid to obtain a surface fabric and a lining fabric, and compounding the surface fabric and the lining fabric to obtain the moisture-absorbing antibacterial layered composite fabric. The composite fabric has excellent antibacterial performance and good moisture absorption performance.

The invention discloses a production process of antistatic polyamide fiber, and relates to the technical field of textile chemical fiber production, the antistatic polyamide fiber comprises the following raw materials by weight: 30-40 parts of polyethylene glycol terephthalate, 60-70 parts of polyamide, and 3.6-4.8 parts of master batch. The master batch is prepared from the following raw materials in parts by weight: 80 to 90 parts of polyamide, 2 to 4 parts of an antistatic agent, 0.7 to 0.9 part of an anti-ultraviolet agent, 0.7 to 0.9 part of an auxiliary agent, 2.5 to 3.5 parts of a toughening agent and 0.5 to 0.7 part of a dispersing agent. The synthesized antistatic agent contains carbon fibers, a polyether structure, an amide structure and a DOPO structure, so that the antistatic property and flame retardance of the antistatic polyamide fiber are improved. The synthesized anti-ultraviolet agent contains a benzimidazole structure, a sulfydryl ester structure, a hindered phenol structure and an amide structure, so that the ultraviolet aging resistance of the antistatic polyamide fiber is improved.

The invention provides an anti-ultraviolet composite particle, an anti-ultraviolet polyamide material and a preparation method and application of the anti-ultraviolet composite particle, the anti-ultraviolet composite particle comprises a nano-microsphere with a core-shell structure and a benzotriazole anti-ultraviolet agent adsorbed outside the nano-microsphere, the core of the nano-microsphere comprises zinc oxide and cerium oxide, and the core of the nano-microsphere comprises zinc oxide and cerium oxide. The shell layer comprises silicon dioxide; zinc oxide and cerium oxide are matched to serve as a core, silicon dioxide serves as a shell layer, and a benzotriazole anti-ultraviolet agent is adsorbed outside the shell layer, so that the obtained anti-ultraviolet composite particles have long-term and excellent anti-ultraviolet performance, and can be uniformly dispersed in polyamide resin; the obtained polyamide material also has long-term and excellent ultraviolet resistance, and meanwhile, the spinnability of the polyamide fiber is not influenced.

The invention relates to the technical field of polymer composite materials, in particular to an aramid nanofiber low-frequency wave-absorbing composite material and a preparation method thereof. The aramid nanofiber low-frequency wave-absorbing composite material is prepared from the following raw materials: magnetic wave-absorbing fibers and aromatic polyamide nanofibers, the magnetic wave-absorbing fiber is prepared from a raw material system comprising FeCo magnetic wave-absorbing filler, aromatic polyamide fiber and a hyperbranched polysiloxane modifier. The aramid nanofiber low-frequency wave-absorbing composite material prepared by taking the magnetic wave-absorbing fibers and the aromatic polyamide nanofibers as raw materials not only has excellent mechanical properties (the tensile strength can reach 133 Mpa), but also has excellent wave-absorbing performance (the minimum reflection loss can reach-46.8 dB, and the low-frequency effective absorption bandwidth (EAB) is 2.24 GHz (5.52 GHz to 7.76 GHz). The method can be widely applied to the fields of communication and electronic equipment.

The present invention addresses the problem of providing a tire in which deterioration in steering stability is suppressed even when polyamide fibers having a low amide density are used. Provided is a tire which is the solution to the foregoing problem and which is characterized in that: the tire comprises a carcass layer, belt layers (60A, 60B), and a belt reinforcement layer; the carcass layer and the belt reinforcement layer include reinforcement cords; the reinforcement cords of at least one of the carcass layer and the belt reinforcement layer include polyamide fibers having an amide density of 14.0 or less; and (i) angles (α, β) formed by the reinforcement cords (60A-1, 60B-1) of the belt layers (60A, 60B) with respect to the tire circumferential direction (DC) are 25 degrees to 65 degrees, inclusive, or (ii) angles formed by the reinforcement cords of the carcass layer with respect to the tire circumferential direction are 70 degrees or more and less than 90 degrees.

The invention relates to the technical field of knitted fabrics, in particular to a high-strength wear-resistant anti-snagging functional dry knitted fabric for exercise training and a production process thereof, and the production process comprises the following steps: weighing the following raw materials in parts by weight: 30-40 parts of polyester fibers, 20-30 parts of aramid fibers, 5-10 parts of jade fibers and 5-10 parts of polyamide fibers; polyester fibers, aramid fibers, jade fibers and polyamide fibers are subjected to relaxation treatment and then subjected to a drawing procedure, and the mixed roving is obtained. According to the knitted fabric for exercise training, polyester fibers, aramid fibers, jade fibers and polyamide fibers are blended and blended to prepare mixed roving, meanwhile, the mixed roving is infiltrated and improved through infiltrating liquid, finally, the mixed roving is matched with modified polyester filaments to be subjected to circular knitting improvement, and the obtained knitted fabric has the advantages of being excellent in wear resistance, mechanical strength performance and snagging performance, good in elasticity and good in elasticity. And the knitted fabric has remarkable moisture absorption, dryness and dryness and washing resistance, and the comprehensive coordination of the product is excellent.

The present invention relates to the technical field of aromatic polyamide fiber spinning aids, and specifically relates to a light aging resistant sizing agent for aramid fibers, an anti-ultraviolet aramid fiber and a preparation method thereof. The light aging resistant sizing agent includes a spinning sizing agent, an anti-ultraviolet aging agent and a coupling agent; the anti-ultraviolet aging agent includes inorganic nanoparticles and organic ultraviolet stabilizers. The preparation method of the anti-ultraviolet aramid fiber is as follows: perform an oiling operation on the para-aramid fiber, and then perform heating to achieve thermal crosslinking to obtain the anti-ultraviolet aramid fiber. By adding inorganic nanoparticles and organic ultraviolet stabilizers to the spinning sizing agent and fixing them on the fiber surface through a thermal crosslinking reaction, the present invention forms an anti-ultraviolet aging protection layer that can exert an ultraviolet protection effect, which can well solve the problems of poor anti-ultraviolet performance of para-aramid fibers and accelerated oxidation and degradation of polymer chains under ultraviolet light, and can also meet the requirements for fiber properties such as stretching and wear resistance in subsequent processes.

A non-woven battery separator and processes for forming the non-woven battery separator includes a fiber blend including cellulose fibers, microfibrillated fibers, and optionally polyester and / or aramid fibers. Also disclosed are batteries including the non-woven battery separator. During fabrication, the non-woven battery separator can be effectively dried at temperatures between 120°C and 180°C, which results in the fibers absorbing water when in use. Some battery electrolytes such as lithium hexafluorophosphate react with water to form hydrogen fluoride (HF), which can be corrosive and shorten battery lifecycles and affect performance. Absorbing water from the electrolyte increases the battery life cycle by reducing HF generation.

The invention discloses an organic / inorganic composite anti-ultraviolet polyamide 66 fiber master batch, a preparation method thereof and a functional fiber. The organic / inorganic composite anti-ultraviolet polyamide 66 fiber master batch is prepared from the following raw materials in parts by weight: 50-85 parts of polyamide 66 resin; 10 to 45 parts of an organic / inorganic composite anti-ultraviolet nano material; 0.5 to 10 parts of a fluorescent whitening agent; 0.2 to 5.0 parts of a dispersant; the organic / inorganic composite anti-ultraviolet nano material is prepared from an inorganic anti-ultraviolet material, a coupling agent and an organic ultraviolet absorbent. The fiber and the fabric which are made of the master batch have an anti-ultraviolet function, and also have higher strength, smaller fineness, soft luster, soft hand feeling and comfort.

The present invention addresses the problem of providing a cord capable of reducing environmental load while maintaining physical properties at high temperatures. In order to solve the problem, provided is a hybrid cord characterized by comprising polyamide 4, 10 fibers and fibers A having an elongation at break of 7% or less.

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 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 relates to a heat-dissipating and breathable exhaust insole and a preparation method thereof. The insole is obtained by weaving a braided rope, the braided rope is obtained by twisting a plurality of polyamide fiber yarns, and a heat-conducting coating layer is arranged on the surface of at least one polyamide fiber yarn. The heat-conducting coating layer is prepared from the following raw materials in parts by weight: heat-conducting filler, methyl vinyl silicone rubber, carboxyl-terminated polycaprolactone, aminopropyl double-terminated polydimethylsiloxane, silazane, maleic anhydride graft, a diluent, an inhibitor and platinum water. The dispersity and compatibility of the heat-conducting filler are promoted through silazane and aminopropyl double-terminated polydimethylsiloxane, and then the heat-conducting filler is matched with the methyl vinyl silicone rubber, the carboxyl-terminated polycaprolactone and the maleic anhydride graft, so that a heat-conducting coating layer obtained after curing is stably adhered to the surface of the polyamide fiber yarn; and meanwhile, the insole has better moisture absorption, elasticity and heat conduction performance, so that the woven insole has better air permeability, heat dissipation performance and comfort.

The invention discloses an antistatic modified polyamide fiber and a preparation method thereof, and relates to the field of fibers. When the antistatic modified polyamide fiber is prepared, nano-silver is loaded on halloysite powder nanotubes in situ to prepare pre-modified halloysite powder nanotubes; grafting 9H-carbazole-9-formaldehyde to chitosan, and uniformly mixing the chitosan with the pre-modified halloysite powder nanotube and silver nitrate to obtain a modified halloysite powder nanotube; the preparation method comprises the following steps: reacting diethyl (hydroxymethyl) phosphate with carbazole-N-formyl chloride to obtain a functional monomer; reacting hexamethylenediamine, adipic acid, pyromellitic dianhydride and a functional monomer to prepare a modified polyamide slice; uniformly mixing the modified polyamide slices, the modified halloysite powder nanotubes, carbazole and ferric trichloride, spinning, and grafting 4-aminomethyl-2, 2, 6, 6-tetramethylpiperidine to obtain the antistatic modified polyamide fiber. The antistatic modified polyamide fiber prepared by the invention has excellent antistatic property, antibacterial property, flame retardance and aging resistance.

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 present invention provides a fiber structure having excellent antibacterial properties and washing durability, and a method for producing the same. [Solution] A textile structure having polyamide fibers and containing a dye, a quinoline-based compound, and a phenol derivative, wherein the textile structure contains 0.04% by mass or more of the quinoline-based compound relative to the mass of the textile structure, and even after 10 standard washes in accordance with the "SEK Mark Textile Product Washing Method," the textile structure contains 0.04% by mass or more of the quinoline-based compound relative to the mass of the textile structure, and 0.20% by mass or more and 4.00% by mass or less of the phenol derivative relative to the mass of the textile structure.

The invention relates to the technical field of aromatic polyamide fiber spinning assistants, in particular to an aramid fiber anti-light-aging oil agent, an anti-ultraviolet aramid fiber and a preparation method, and the anti-light-aging oil agent comprises a spinning oil agent, an anti-ultraviolet-aging agent and a coupling agent; the anti-ultraviolet aging agent comprises inorganic nanoparticles and an organic ultraviolet stabilizer. The preparation method of the anti-ultraviolet aramid fiber comprises the following steps: oiling para-aramid fiber, and then heating to realize thermal crosslinking to obtain the anti-ultraviolet aramid fiber. The inorganic nanoparticles and the organic ultraviolet stabilizer are added into the spinning oil agent, and the spinning oil agent is fixed on the surface of the fiber through a thermal crosslinking reaction, so that an anti-ultraviolet aging protection layer capable of playing an ultraviolet protection effect is formed; the problems that the para-aramid fiber is poor in anti-ultraviolet performance and macromolecular chains accelerate oxidative degradation under ultraviolet light can be well solved, and the requirements of subsequent procedures for fiber performance such as stretching and wear resistance can be met.

The invention belongs to the field of novel polyamide composite fiber materials, and particularly discloses a high-toughness polyamide fiber composite material and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 55-75 parts of long-chain polyamide PA610 resin, 10-25 parts of ultra-high molecular weight polyethylene fiber, 8-18 parts of polyether block amide elastomer, 1.5-4 parts of a compound nucleating agent, 0.8-2 parts of a titanate coupling agent and 0.3-1 part of a composite antioxidant. The preparation method is characterized by comprising the following steps: firstly, carrying out surface pretreatment on the ultra-high molecular weight polyethylene fiber by adopting a low-temperature plasma technology so as to improve the interfacial compatibility of the ultra-high molecular weight polyethylene fiber and a resin matrix; and then carrying out melt blending granulation on the pretreated fiber and other raw materials through a twin-screw extruder, wherein the fiber is added from a side feeding port to avoid excessive shearing and breaking. The obtained product has ultrahigh impact toughness, excellent rigidity, excellent low-temperature toughness and heat resistance, and is especially suitable for the fields of manufacturing automobile parts, sports protection equipment and the like with extremely high requirements on toughness and durability.

The present invention belongs to the technical field of polyamide fibers, and specifically relates to a polyamide material for industrial silk, a preparation method thereof, and fibers. The modified polyamide provided by the present invention has a structure shown in Formula I: wherein Q is a semi-aromatic amide structural unit, R is a phosphorus-containing semi-aromatic amide structural unit, S is an aliphatic amide structural unit, and P is a polyamide structural unit; a is 3 to 6, b is 1 to 3, c is 2 to 5, and d is 110 to 240. The present invention introduces aromatic ring structure, phosphorus-containing group and flexible chain segment into polyamide molecular chain through copolymerization, utilizes rigid benzene ring structure and phosphorus-containing flame retardant structure to reduce hydrogen bonding between polyamide molecular chains, increases the proportion of amorphous region of modified polyamide, utilizes long-chain polyamide flexible chain segment to improve the softness and activity of modified polyamide, and at the same time, the side group phosphorus-containing aromatic ring structure also improves the flame retardant performance of modified polyamide.

The invention relates to the technical field of textiles, and discloses high-elasticity modified nylon spandex as well as a preparation method and application thereof. The modified polyamide / spandex prepared by the invention is prepared by blending modified polyamide fibers and spandex fibers into yarns and then spinning the yarns; the modified chinlon / spandex not only has excellent wear resistance of chinlon, but also has excellent elastic property of spandex. The modified polyamide fiber is prepared from the following raw materials in parts by weight: 80 to 120 parts of polyamide chips, 5 to 9 parts of thermoplastic polyamide elastomer, 8 to 12 parts of modified cellulose and 18 to 25 parts of polyvinylpyrrolidone, the added modified cellulose and polyvinylpyrrolidone have a synergistic effect, so that the hygroscopicity, the air permeability and the antistatic property of the modified nylon / spandex are improved. Therefore, the modified brocade / spandex fabric disclosed by the invention has a good application prospect in sportswear.

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.