292 results about "Nylon 66" patented technology

The invention relates to the technical field of chinlon industrial yarns, and discloses a preparation method of a high-strength and high-toughness chinlon industrial yarn, which comprises the following steps: (1) preparing raw materials; (2) mixing the materials; (3) melt spinning; (4) stretching and heat treatment; (5) fiber surface modification; according to the invention, by fusing the advantages of high crystallization speed of nylon 6 and high melting point and high strength of nylon 66, a matrix material with good processing fluidity is formed, and the strength and fatigue cycle resistance of the chinlon industrial fiber are obviously improved. By introducing the maleic anhydride grafting agent, polar groups can be introduced among molecular chains through grafting reaction, so that the hydrogen bond density and crystallinity are remarkably improved, the molecular chains are arranged more regularly, and the tensile strength and heat resistance of the material are improved. The sea-island structure of the polyether ester elastomer effectively absorbs impact energy, so that the elongation at break is greater than or equal to 28%; the nano silicon dioxide inhibits crack propagation, and the service life of the material is remarkably prolonged.

The invention relates to the technical field of polymer composite materials, in particular to a carbon fiber reinforced nylon 66 / polyphenylene sulfide composite material and a preparation method thereof.The carbon fiber reinforced nylon 66 / polyphenylene sulfide composite material is prepared from, by weight, 40-55 parts of nylon 66, 30-45 parts of polyphenylene sulfide, 15-30 parts of carbon fibers, 5-6 parts of compatilizer, 0.8-1.2 parts of antioxidant and 3-4 parts of flexibilizer, the flexibilizer is ethylene-octylene copolymer grafted maleic anhydride, the grafting rate is 1.2-1.5%, the flexibilizer is ethylene-octylene copolymer grafted maleic anhydride, the grafting rate is 0.8-1.0%, and the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1: 1. The composite material prepared by the invention is suitable for medium-high temperature scenes, not only solves the problems of insufficient high temperature resistance and poor mechanical properties of traditional materials, but also has good processability and environmental tolerance.

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.

This invention relates to the field of sealing ring technology, and proposes an aging-resistant rubber sealing ring and its preparation method. An aging-resistant rubber sealing ring comprises the following components in parts by weight: 70-80 parts of nitrile rubber, 20-25 parts of chloroprene rubber, 20-30 parts of filler, 3-4 parts of activator, 1-2 parts of co-activator, 2-3 parts of antioxidant, 4-8 parts of plasticizer, 2-3 parts of crosslinking agent, and 1-2 parts of accelerator; the filler includes modified carbon nanotubes and nylon 66 fiber; the preparation method of modified carbon nanotubes includes the following steps: A1, adding carbon nanotubes to mixed acid, soaking, filtering, and drying to obtain pretreated carbon nanotubes; A2, adding the pretreated carbon nanotubes and methyl cyanobenzoate to ethyl acetate, stirring, concentrating, and drying to obtain modified carbon nanotubes. Through the above technical solution, the problem of poor aging resistance of rubber sealing rings in related technologies is solved.

The invention discloses a halogen-free compound flame retardant and application thereof in an antistatic nylon 66 composite material, and belongs to the technical field of polymer composite materials. The halogen-free compound flame retardant is prepared by compounding 68 parts of an organic aluminum hypophosphite flame retardant, 20 parts of a nitrogen-phosphorus intumescent flame retardant, 10 parts of a two-dimensional layered inorganic substance and 2 parts of a coupling agent through a high-speed mixing and drying process. The halogen-free compound flame retardant is blended with nylon 66, reinforced fibers, an antioxidant and the like, and the composite material is prepared through melt extrusion. According to the compound system, the total dosage of the flame retardant is remarkably reduced, the V-0 flame retardant grade is still achieved under the condition that the thickness is 0.8 mm, and the limit oxygen index exceeds 32%. The composite material has excellent flame retardancy and antistatic property while maintaining good mechanical properties, is suitable for a high glass fiber content system, effectively solves the problems of high flame retardant addition amount, difficult processing, high cost and the like in the prior art, and has the advantages of simple process and excellent comprehensive performance.

The invention discloses a preparation method of a nylon 66 salt crystal, which is characterized in that in the method, a nylon 66 salt aqueous solution is subjected to secondary crystallization and a rotary pressure filter process to prepare the nylon 66 salt crystal. According to the technology, the problems of low single-stage yield and large sewage discharge amount are solved by adopting secondary crystallization and evaporation condensate recycling, and the processes of centrifugation, drying, cyclone separation and the like are reduced by replacing a centrifugal machine with a rotary pressure filter, so that the energy consumption per ton of products is reduced.

The invention provides a nylon modified material as well as a preparation method and application thereof, and relates to the technical field of nylon compositing, the nylon modified material comprises the following components: nylon 66, low-viscosity nylon 6, a toughening agent, a compatilizer and a flow crystallization accelerant; wherein the toughening agent comprises a block copolymer containing a polyethylene glycol chain segment and a polydimethylsiloxane chain segment; the compatilizer comprises a compound containing a diglycidyl ether group. According to the nylon modified material provided by the invention, under the condition that the modulus of nylon 66 is slightly reduced, the impact strength is improved, so that the nylon modified material has the characteristics of high flowability, high toughness, self-lubrication and the like, and can meet the requirements of occasions such as automobile parts and industrial production.

The invention provides a polyamide hot melt adhesive containing dynamic reversible covalent bonds and a preparation method thereof, and belongs to the field of high polymer materials. Caprolactam and nylon 66 salt are used as raw materials, a furan ring and a carbon chain with a specific length are introduced, and the polyamide hot melt adhesive containing the dynamic reversible covalent bond is obtained through polymerization with maleimide and a derivative thereof. The melting point of the polymer can be regulated and controlled by regulating and controlling the carbon chain length of aliphatic diamine introduced into the xF salt, a furan ring in the xF salt is subjected to DA addition reaction with maleimide and a derivative thereof, dynamic reversible sites are provided, crosslinking between molecular chains is formed, a net system is formed, and the bonding strength of the material can be greatly improved. By adjusting the ratio of the xF salt to the maleimide and the derivative thereof, the reversible crosslinking behavior of the polymer can be adjusted, and finally the hot melt adhesive which has a lower melting point and excellent bonding strength and can be repeatedly used and recycled is obtained.

The invention discloses an ultra-high-speed motor bearing anti-deformation crown-shaped retainer and a manufacturing method, and belongs to the technical field of motor bearings. The super-high-speed motor bearing anti-deformation crown-shaped retainer is formed by printing functionally graded materials, the functionally graded materials comprise a hard-phase material and a soft-phase material, the hard-phase material is glass fibers, and the soft-phase material is nylon 66; the equivalent elastic modulus of the functionally graded material is continuously and gradually changed in the axial direction from the bottom of the pocket to the tail end of the lock claw, so that the elastic modulus of the bottom area of the pocket is higher than that of the tail end area of the lock claw, and elliptical deformation of the pocket and centrifugal deformation of the lock claw are cooperatively restrained. And active reconstruction of a rigidity field of the crown-shaped retainer is achieved, specifically, a tough phase is constructed in a locking claw area to absorb collision energy, a strengthening phase is formed in a pocket area to weaken stress concentration, a rigidity gradient is established at a connecting part to restrain the umbrella-shaped effect, and the crown-shaped retainer with the high toughness-gradient-high strength characteristics and the design method of the crown-shaped retainer are provided.

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 textile fabrics, in particular to an antibacterial nylon fabric and a preparation method thereof. The antibacterial nylon fabric is prepared from the following materials in parts by weight: 65 to 75 parts of nylon 66, 8 to 10 parts of modified nano zinc oxide, 2 to 3 parts of silver-loaded zirconium phosphate, 3 to 5 parts of compatilizer, 0.2 to 0.5 part of antioxidant and 0.5 to 1 part of lubricant. Wherein the modified nano-zinc oxide is obtained by firstly coating nano-zinc oxide with polydopamine and then grafting the coated nano-zinc oxide with a silane coupling agent. According to the antibacterial nylon fabric and the preparation method thereof, the durability of the antibacterial performance of the antibacterial nylon fabric is improved, and the effective antibacterial capacity is still kept after the antibacterial nylon fabric is washed for multiple times.

The invention discloses a high-toughness schoolbag textile fabric and a manufacturing method thereof, and relates to the technical field of textile processing, and the manufacturing method comprises the following steps: mixing polyester staple fibers, cotton fibers and silver ion modified polyester staple fibers according to a mass ratio of 1: 0.8: 05, carrying out a blowing-carding process, opening and carding to obtain a mixed cotton web, drawing the mixed cotton web, and drying to obtain the high-toughness schoolbag textile fabric. The preparation method comprises the following steps: preparing a base cloth layer, spinning blended yarns through roving and spinning processes, weaving through an air jet loom to obtain a base cloth layer, weaving ultra-high molecular weight polyethylene fibers through a shuttleless textile machine in a plain weave manner to obtain a reinforcing layer, and weaving nylon 66 filaments through a water jet loom in a twill weave manner to obtain a surface layer base cloth. Through layered combination of the base cloth layer, the reinforcing layer and the wear-resistant surface layer, the reinforcing layer can effectively resist traction caused by the weight of daily books and reduce fiber fatigue damage, the wear-resistant surface layer can reduce abrasion damage to the surface of the schoolbag fabric caused by friction, cleaning or sliding friction and the like, and the service life of the schoolbag is prolonged.

The invention provides a high-performance polyamide flame-retardant composite material based on element synergistic effect and a preparation method thereof, and belongs to the technical field of polyamide flame-retardant materials. The preparation method comprises the following steps: preparing a phosphorus-nitrogen flame retardant, preparing a surface-modified rare earth-silicon-based material, preparing a mixture, extruding and granulating. The step of preparing the mixture comprises the following steps: uniformly mixing brominated polystyrene (BPS), a phosphorus-nitrogen flame retardant, a rare earth-silicon-based material, glass fibers, an antioxidant 1098, a heat stabilizer diisooctyl phenyl phosphite, nylon 66 and nylon 6 to obtain the mixture; according to the invention, the use of antimony oxide in the traditional bromine-antimony flame-retardant system preparation process is abandoned, and the preparation process is simple, good in repeatability, green, environment-friendly and efficient.

The invention relates to the technical field of fibers, and discloses an easily biodegradable polyester-nylon composite fiber and a preparation process thereof.The preparation method comprises the steps that 2-(2-acrylamido ethyl formate) benzoic acid is subjected to graft modification to obtain modified polylactic acid, and the modified polylactic acid, polyethylene glycol terephthalate PET and nylon 66 resin are subjected to blending melt spinning to obtain the polyester-nylon composite fiber. The modified polylactic acid improves the compatibility between the PET and the nylon 66 resin, so that the polyester-nylon composite fiber has higher mechanical properties, and the tensile strength and the elongation at break are obviously improved. The polylactic acid has better biodegradability, and the introduced ester group also has biodegradability, so that the biological decomposition rate of the fiber is improved. The modified polylactic acid contains a large amount of hydrophilic carboxyl and amido bonds, so that the moisture regain of the composite fiber is improved, and the modified polylactic acid can be better applied to hydrophilic moisture absorption fiber textiles.

The invention discloses a high-performance true nanoscale fiber membrane as well as a preparation method and application thereof, and belongs to the technical field of nanofiber air filtering materials. The preparation method comprises the following steps: by taking water as a solvent, dissolving a dimethyl diallyl ammonium chloride monomer in deionized water, adding ammonium persulfate and azodiisobutyronitrile as initiators to prepare poly dimethyl diallyl ammonium chloride, then dissolving the poly dimethyl diallyl ammonium chloride and nylon 66 particles in an organic solvent 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 A spinning precursor solution is prepared in 1, 2, 2-trifluoroethanol, and the fiber membrane with a real nanoscale fiber structure is prepared from the spinning precursor solution through an electrostatic spinning technology and a one-step method. Compared with an existing preparation process, the preparation method has the advantages that the process is simple and easy to operate, the production efficiency is high, and the fibrous membrane with the real nanoscale fibers shows excellent filtering performance on fine particulate matters with different particle sizes and shows excellent application potential in the fields of air purification, environmental protection, industrial waste gas treatment and the like.

The invention relates to the technical field of high polymer materials, and discloses a low-temperature-resistant nylon composite material and a preparation method thereof. The nylon composite material prepared by the invention is prepared from the following raw materials in parts by weight: 45-55 parts of nylon 6, 15-25 parts of nylon 66, 2-5 parts of a castor oil-based reinforcing agent, 7-10 parts of glass fibers, 5-10 parts of a toughening agent, 0.5-1 part of a dispersing agent, 0.5-2 parts of a lubricating agent, 0.7-1.5 parts of an antioxidant and 1-2 parts of a coupling agent. According to the invention, nylon 6 and nylon 66 are taken as main raw materials, and functional aids such as a flexibilizer and a castor oil-based reinforcing agent are added, so that the low-temperature resistance and impact toughness of the composite material are improved, and the low-temperature brittleness phenomenon is reduced; wherein the toughening agent and the castor oil-based reinforcing agent are used for remarkably improving the low-temperature resistance through a plasticizing-toughening synergistic effect, dynamic-elastic network complementation and other mechanisms.

The invention discloses a flexible nylon yarn composite fiber membrane with a heat and humidity management function and a preparation method of the flexible nylon yarn composite fiber membrane, and belongs to the technical field of radiation cooling heat and humidity management materials. According to the preparation method, a silk fibroin (SF) solution and a nylon 66 (PA66) solution are mixed according to a certain proportion to prepare a precursor solution, and the PA66-SF composite fiber membrane is prepared by adopting an electrostatic spinning process. By introducing the PA66, the defect that the reflectivity of an ultraviolet region of an SF fiber membrane is low due to the inherent absorption characteristic of protein is effectively improved, the mechanical property of the SF fiber membrane can be remarkably improved, and the fiber membrane has excellent dry flexibility and wet stability. The preparation method provided by the invention is simple and convenient to operate, and the prepared flexible fiber membrane material has a temperature-humidity collaborative management function and is wide in application prospect.

The invention relates to a large-capacity semi-dull nylon 66 resin continuous polymerization device for civil filaments and a production process, and through a whole-process continuous design (salification-concentration-polymerization-pelletizing) and an intelligent regulation and control system, the production efficiency and the product consistency are remarkably improved. According to the process, high-efficiency production is realized, and meanwhile, the product quality and the functional applicability are greatly improved through innovative structural design; the dispersity of TiO2 master batches in resin is effectively improved through high-shear mixing of a screw system, so that the spinnability is further improved; the continuous process supports the flexible adaptation of the antioxidant and the extinction master batch, reduces the waste of raw materials, lowers the comprehensive production cost, and obviously enhances the market competitiveness.

The invention provides a composite intumescent flame retardant modified polyamide composite material and a preparation method thereof. The flame-retardant nylon 66 and / or nylon 6 composite material is prepared from the following components in parts by weight: 75-85 parts of nylon 66 and / or nylon 6 matrix and 15-25 parts of composite intumescent flame retardant, wherein the composite intumescent flame retardant is prepared from the following components in parts by weight: 30-50 parts of a phytic acid derivative; 20 to 40 parts of melamine pyrophosphate (MPP); 5 to 15 parts of modified nanosheets; and 10-20 parts of a hydrogen bond cross-linking agent. According to the composite intumescent flame retardant modified polyamide composite material disclosed by the invention, the limit oxygen index and the fireproof grade can be remarkably improved under the condition that the addition amount of the composite intumescent flame retardant is low, and the mechanical property of the polyamide material is not influenced.

The invention relates to a reinforced nylon 66 material as well as a preparation method and application thereof. The reinforced nylon 66 material comprises the following components in parts by weight: 20-45 parts of low-viscosity nylon 66; 20 to 45 parts of high-viscosity nylon 66; 15 to 30 parts of ground glass fiber; 3-6 parts of a toughening agent; 0-10 parts of kaolin; 0.8 to 2 parts of a lubricant; 0.2 to 0.4 part of a silane coupling agent; and 0.3 to 0.8 part of an antioxidant. The reinforced nylon 66 material is used for extrusion molding of plates or sheets. Compared with the prior art, the reinforced nylon 66 material prepared by the invention has the advantages that the processing window of extrusion molding is effectively improved by adopting a scheme of compounding high-viscosity nylon 66 and low-viscosity nylon 66, the size stability of a profile is improved and the cost is reduced by adopting ground glass fibers, and further, the surface smoothness of the profile can be better by adding a small amount of kaolin; through particle extrusion, the reinforced nylon 66 material for extrusion molding of sheets or plates is prepared.

The invention belongs to the field of high polymer materials, and discloses a method for preparing a high-strength wear-resistant nylon 66 material, the surface of nano silicon dioxide is coated with a silane coupling agent and a cross-linking accelerant, the stability of a coating structure is improved through gamma ray irradiation, the mechanical property and wear resistance of nylon 66 can be improved by adding the silane coupling agent and the cross-linking accelerant into the nylon 66, and meanwhile, the high-strength wear-resistant nylon 66 material is prepared. After being used for a long time, the nylon 66 can still keep good rigidity and wear resistance and is excellent in comprehensive performance.

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.

The anti-tripping composite structure embedded sleeve comprises a body and a stainless steel sleeve, the body is of a tubular structure with one end opened and the other end sealed, external threads, used for being combined with the interior of a sleeper, on the outer circumferential wall of the body are single continuous threads, and the stainless steel sleeve is embedded in the inner wall of the body. And the internal thread on the inner wall of the stainless steel sleeve is combined with the internal thread on the body to form a continuous thread with a consistent thread shape. By optimizing the structure of the pre-embedded sleeve, the torsional shear strength and the tensile strength of the internal thread are further enhanced, the surface hardness of the internal thread of the pre-embedded sleeve is increased, the friction coefficient is reduced, and the service life of the pre-embedded sleeve is prolonged. The potential safety hazard that the pre-embedded sleeve made of the glass fiber reinforced nylon 66 composite material is tripped in construction assembly and operation is solved, and the situation that the surface of the internal thread is scratched due to friction and shearing in the fastening process of the pre-embedded sleeve and a screw spike under the conditions that hard impurities are mixed in the pre-embedded sleeve and water is accumulated and ice is formed is avoided; and the risk of potential failure of the pre-embedded sleeve is further caused.

The present invention relates to a high-gloss high-glass-fiber-content nylon 66 composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The components of the composite material are: 50-60wt% of alkali-free glass fiber, 2.2-3.5wt% of a high-gloss compatibilizer, 3.5-5wt% of a toughening agent, 0.15-0.2wt% of an antioxidant, and 0.6-0.9wt% of a processing aid, with the remainder being nylon 66 resin; the high-gloss compatibilizer is substituted by n-alkyl alcohol and vinyl trichlorosilane to form intermediate 1, and then intermediate 2 is prepared by initiating addition of methyl thioglycolate and the unsaturated double bond of intermediate 1, and finally amine transesterification is carried out by γ-aminopropyl triethoxysilane and the terminal methyl ester of intermediate 2; the high-gloss compatibilizer effectively reduces the high-crystalline region-low-crystalline region interface content in the composite system, reduces the scattering of light, and thus allows the composite material to maintain a higher gloss.

The invention discloses phosphorus-nitrogen-silicon multi-synergistic halogen-free intrinsic flame-retardant nylon 66 and a preparation method thereof. The phosphorus-nitrogen-silicon multi-synergistic halogen-free intrinsic flame-retardant nylon 66 is prepared from an amino-terminated polysiloxane reactive flame-retardant monomer containing phosphorus, nitrogen and silicon elements and nylon 66 salt through in-situ copolymerization, the flame-retardant monomer is prepared by carrying out hydrosilylation reaction on an amino-terminated polysiloxane precursor with an active Si-H bond and a phosphorus / nitrogen compound containing an unsaturated double bond; through a copolymerization reaction, a flame-retardant unit is introduced into a nylon 66 main chain on a molecular level, so that the problems of poor compatibility and migration of a traditional additive flame retardant are solved. By utilizing the synergistic flame-retardant effect of phosphorus, nitrogen and silicon elements, the obtained copolymerized nylon 66 can achieve excellent flame-retardant property under the condition that the addition amount of a flame-retardant monomer is relatively low, meanwhile, the inherent excellent mechanical properties such as high strength and high toughness of the nylon 66 are maintained to the greatest extent, the technical problem that the flame-retardant property and the mechanical properties are difficult to balance is solved, and the flame-retardant property of the copolymerized nylon 66 is greatly improved. The method has a wide industrial application prospect.

The utility model discloses a wear-resistant and crease-resistant polyester fabric which comprises a wear-resistant fabric layer and an elastic fabric layer which are compounded with each other, the wear-resistant fabric layer is formed by interweaving first yarns, and each first yarn comprises a first core yarn and a first covering fiber layer covering the outer side of the first core yarn; the first core yarn comprises chinlon filaments and polyester filaments which are doubled and twisted, fibers used by the first wrapping fiber layer comprise a skin layer and a core layer, the core layer is a polyolefin elastomer, and the skin layer is nylon 66; the elastic fabric is formed by interweaving second yarns, and the second yarns comprise second core yarns and second covering fiber layers covering the outer sides of the second core yarns; the second core yarn is elastic filaments, and the second wrapping fiber layer is superfine polyester fibers. And the nylon 66 has a good wear-resistant effect. The elastic filaments can improve the recovery performance of the fabric, and the fabric has a good anti-wrinkle effect. And the core layer adopts the polyolefin elastomer, so that the recovery of the fabric can be promoted after the fabric is wrinkled. The superfine polyester fibers can improve the touch feeling of the fabric.

The invention discloses a nylon fabric capable of preventing a pattern from floating and discoloring and a process for manufacturing a sports cap by using the nylon fabric, and relates to the technical field of clothing textile. The process comprises the following steps: firstly, mixing deionized water with polyethylene glycol 400 to form a transparent solution, then adding waterborne polyurethane emulsion, and stirring to obtain a transparent solution; then adding nano silicon dioxide and modified nano zinc oxide, carrying out ultrasonic dispersion, then adding an ultraviolet light absorber, epoxidized soybean oil and an organic silicon defoaming agent, stirring, and filtering to obtain an anti-discoloration composite coating solution; the preparation method comprises the following steps: pretreating a nylon 66 fabric base material to remove greasy dirt and floating dust, drying, coating the printing surface of the fabric with the obtained coating liquid by adopting a scraper coating machine, sequentially pre-drying, curing, cooling and sealing to obtain the anti-discoloration modified nylon fabric, cutting the anti-discoloration modified nylon fabric according to the sports cap pattern, printing and drying the printing area of the cap body cutting piece, and finally ironing and shaping to obtain the sports cap capable of preventing the pattern from floating and discoloration.

The invention discloses a flame-retardant modified glass fiber reinforced nylon 66 composite material containing phosphaphenanthrene Schiff base imide oligomer and a preparation method of the flame-retardant modified glass fiber reinforced nylon 66 composite material. The raw material formula of the composite material is prepared from the following components in percentage by mass: 25.0 to 40.0 percent of glass fiber, 40.0 to 56.8 percent of nylon 66, 16.1 to 19.7 percent of phosphaphenanthrene-containing Schiff base imide oligomer and 0.1 to 0.3 percent of antioxidant, the phosphaphenanthrene Schiff base-containing imide oligomer contains DOPO, Schiff base and trifluoromethyl, is combined with an imide structure and plays a role in a gas phase and a condensed phase at the same time, so that efficient flame retardance of a glass fiber reinforced nylon 66 composite material is realized; the surface energy of trifluoromethyl is distributed on an interface, agglomeration of the glass fiber is reduced, the processing fluidity is improved, an anhydride group is arranged at the tail end of the imide oligomer and can react with hydroxyl on the surface of the glass fiber and amino at the tail end of nylon 66 at the same time, the interface compatibility is enhanced, and the mechanical property of the material is improved.

The invention relates to the technical field of functional magic tapes, in particular to a flame-retardant nylon material, a preparation method of the flame-retardant nylon material and a magic tape. The flame-retardant nylon material comprises the following raw materials in parts by mass: 60-80 parts of nylon 66, 10-20 parts of a multifunctional composite flame retardant and 0.2-1.0 part of a stabilizer, the multifunctional composite flame retardant is prepared by compounding and blending a zinc oxide-lignin composite material and piperazine pyrophosphate. The magic tape prepared from the flame-retardant nylon material disclosed by the invention has excellent flame retardance and ultraviolet resistance.