361 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 discloses a preparation method of a weather-resistant toughened nylon 66 material, and relates to the technical field of high polymer material preparation. The method is realized through the following steps: A, preparing modified titanium dioxide powder with a coating structure; b, weighing and mixing; and C, melt extrusion. According to the invention, the modified titanium dioxide powder which takes nano titanium dioxide as a matrix, is coated with the fluorine-containing polymer on the surface and improves the stability of the coating structure by means of gamma ray irradiation is added into the nylon 66 material, so that the long-term weather resistance and toughness of the nylon 66 material are improved at the same time; according to the nylon 66 material, the advantages of long-term weather resistance and toughness of the nylon 66 material coexist successfully, weather-resistant toughening modification of the nylon 66 material is smoothly realized, meanwhile, the rigidity is not obviously reduced, good rigidity and toughness can still be kept after long-term use, the comprehensive performance is excellent, and the high requirement of emerging industries for long-term use performance of the nylon 66 material is met; and development of emerging industries in China is promoted.

The 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 composite material is prepared from the following components in percentage by weight: 50 to 60 percent of alkali-free glass fiber, 2.2 to 3.5 percent of highlight compatibilizer, 3.5 to 5 percent of flexibilizer, 0.15 to 0.2 percent of antioxidant, 0.6 to 0.9 percent of processing aid and the balance of nylon 66 resin, the high-gloss compatibilizer is prepared by the following steps: substituting n-alkyl alcohol and vinyl trichlorosilane to prepare an intermediate 1, initiating addition by methyl mercaptoacetate and unsaturated double bonds of the intermediate 1 to prepare an intermediate 2, and finally performing amine ester exchange on gamma-aminopropyltriethoxysilane and terminal methyl ester of the intermediate 2. The highlight compatibilizer effectively reduces the content of a high crystal region-low crystal region interface in a composite system and reduces scattering of light, so that the composite material keeps higher glossiness.

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.

The invention relates to the technical field of cables, in particular to a fireproof cable for a subway, which comprises a plurality of cable cores and a PET (Polyethylene Terephthalate) film layer, a mica tape wrapping layer, a copper net shielding layer and an outer sheath are sequentially coated outside the PET film layer; the outer sheath is prepared from the following raw materials in parts by weight: 50-60 parts of PVC resin, 8-15 parts of nylon 66 resin, 5-10 parts of aliphatic TPU, 5-8 parts of EVA-G-MAH, 3-5 parts of POE-G-MAH, 1-3 parts of a calcium-zinc stabilizer, 10-20 parts of a filler, 1-2 parts of polyethylene wax, 0.5-1 part of calcium stearate, 10-20 parts of a flame retardant, 10-30 parts of a plasticizer and 0.1-0.5 part of an antioxidant. The outer sheath prepared by the invention has excellent mechanical properties and excellent fireproof and flame-retardant properties, not only is high in flame-retardant grade, but also is small in heat and smoke production after combustion, and is an excellent material for preparing fireproof cables for metro.

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 discloses a nylon blended flame-retardant plastic particle and a preparation method thereof. According to the technical scheme, the nylon blended flame-retardant plastic particle is characterized by comprising the following components in percentage by weight: 24-30% of nylon 6, 52-58% of nylon 66, 10-15% of a flame retardant, 0.1-0.5% of a flowable agent, 0.1-0.4% of an antioxidant, 0.1-0.3% of a nucleating agent and 1-3% of a flexibilizer. The material has the effects of good fluidity and high flame retardant property.

The utility model discloses a granulator for nylon 66, which comprises a square tube, supporting legs are vertically fixed on the bottom surface of the square tube, a feeding piece is arranged on the inner wall of the lower end of the square tube, a pressing piece is arranged right above the feeding piece and is connected in the square tube in a lifting manner, a cutting piece is arranged at the outlet end of the square tube, and the cutting piece is connected with the square tube in a lifting manner. And the outlet end of the cutting piece is fixedly connected with an inclined material guide plate. The feeding piece is arranged in the square pipe, and the pressing piece connected in the square pipe in a lifting manner is arranged above the feeding piece, so that the function of automatically feeding the strip-shaped nylon 66 is realized, and meanwhile, a plurality of strip-shaped nylon 66 can be conveniently fed and granulated at one time, so that the workload of operators is reduced, the labor intensity of the operators is reduced, and the production efficiency is improved. And meanwhile, the pelletizing efficiency of the equipment on the strip-shaped nylon 66 is also improved.

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 present invention provides a high and low temperature resistant nylon material and a preparation method thereof. The composition of the high and low temperature resistant nylon material includes: 45 to 60 parts of nylon 66, 35 to 45 parts of reinforcing fiber, 5 to 10 parts of low temperature toughening aid, 3 to 5 parts of high temperature resistant aid, 0.5 to 1 part of inorganic lubricant, 0.2 to 0.5 parts of compatibilizer, 0.2 to 0.5 parts of antioxidant, and 0.2 to 0.5 parts of copper salt heat stabilizer; wherein, the low temperature toughening aid is a particle of an organic-inorganic interpenetrating network structure; the high temperature resistant aid is a composite of titanate, long carbon chain carboxylic acid calcium salt, silicone, and calcium sulfate whisker. The low temperature toughening aid of the organic-inorganic interpenetrating network structure is micro-crosslinked to restrain the movement of molecular chains, and the high temperature resistant aid is dispersed into fine particles in nylon to promote the reduction of the spherulite size of nylon 66, and a nylon material with high and low temperature resistance is prepared with the assistance of calcium sulfate whiskers.

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 an ethylene glycol-resistant nylon material and a preparation method thereof. The ethylene glycol-resistant nylon material comprises the following raw materials in parts by mass: 100 parts of nylon 66; 30 to 35 parts of glass fiber; 0.8 to 1.4 parts of a silane coupling agent; 6.7 to 9.2 parts of modified graphene oxide; the modified graphene oxide is obtained by modification after transesterification of hydroxyl groups on the surface of graphene oxide and phosphite triester, the phosphite triester modified graphene oxide can enhance the strength of polyamide, on the other hand, the electron cloud effect of the graphene oxide is enhanced through the introduced phosphite ester, and by means of the electron mobility of the phosphite ester, the polyamide can be effectively dispersed in the graphene oxide. The electropositivity of carbonyl carbon in polyamide is weakened, the possibility that carbonyl in polyamide reacts with hydroxyl in ethylene glycol is reduced, and the ethylene glycol resistance of the nylon material is improved; the phosphite ester can also preferentially replace carbonyl carbon in polyamide to react with hydroxyl in ethylene glycol, so that alcoholysis of polyamide is delayed, and the nylon material has excellent strength and ethylene glycol resistance.

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 utility model discloses a polyester imitated nylon 66 weft knitting elastic fabric which comprises a fabric body, the fabric body comprises face yarn and lining yarn, the face yarn is made of 50D / 72F high-elasticity matte moisture-absorption quick-drying polyester DTY, the lining yarn is made of 55D-70D spandex, the face yarn forms a complete circulation double-rib structure through two knitting needles and two paths of yarn, and the front face and the back face of the fabric body are formed. And the liner yarns form a complete circular weft plain stitch structure through two knitting needles and one path of yarns. The surface yarns form a complete circulating double rib structure through two knitting needles and two paths of yarns to form the front side and the back side of the fabric body, and the surface yarns adopt 50D / 72F high-elastic matte moisture-absorption quick-drying polyester DTY, so that the lining yarn structure is combined, the fabric body has good comfort, fullness and elastic resilience, the price is low, and the production cost of the fabric is greatly reduced.

The invention relates to the technical field of hydrogen storage high-pressure containers, and discloses a manufacturing method of a regenerated carbon fiber reinforced lining, which comprises the following steps: S1, manufacturing a pressure container inner container seal head according to a seal head mold, manufacturing by adopting an injection molding process, embedding a metal bottleneck valve seat into the seal head mold, and controlling the temperature of an injection molding material to be 200-300 DEG C and the temperature of the mold to be 70-80 DEG C; the invention further discloses a composite material pressure container with the regenerated carbon fiber reinforced lining, the composite material pressure container comprises the recoverable lining, the recoverable lining comprises an end socket and a cylinder body, and the end socket and the cylinder body are connected into a whole through welding; and the two metal bottleneck valve seats are respectively connected with the sealing heads at the two ends of the recyclable lining and are used for connecting an external pipeline of the pressure container. By recycling nylon 6 or nylon 66 and carbon fiber prepreg to manufacture the cylinder body and combining reelpipe forming and optimized carbon fiber winding design, the strength and the pressure bearing capacity of the inner container are improved, material use is reduced, and the problem of mass increase caused by a high-density metal reinforcing piece is solved through a light-weight structure.

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 discloses a modified nylon 66 material and a preparation method thereof, and belongs to the technical field of high polymer materials. The modified nylon 66 material is prepared from the following raw materials in parts by mass: 100 to 120 parts of modified nylon 66 resin, 20 to 30 parts of reinforced resin and 1 to 5 parts of antioxidant. The raw materials are mixed, fused and granulated to obtain the modified nylon 66 material. Wherein the modified nylon 66 resin contains an oxazolidinone ring and a silica group. According to the invention, an isocyanate compound and organosiloxane of epoxy groups are added in the polymerization stage of nylon 66 resin, and an oxazolidinone ring and a silica group are introduced while a polymerization reaction is accelerated, so that on one hand, the oxazolidinone ring and the silica group can be utilized to enhance the heat resistance and hydrolysis resistance of the material, and the nylon material is modified from a polymerization end; and on the other hand, the compatibility with reinforced resin can be improved, the effect of the reinforced material is fully exerted, and the mechanical property and hydrolysis resistance of the modified nylon material are improved.

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.