912 results about "Nylon material" patented technology

The invention discloses an antibacterial nylon material as well as a preparation method and application thereof, relates to the technical field of antibacterial high polymer materials, and solves the problems of poor antibacterial performance and difficulty in industrial production of existing antibacterial nylon 6. The preparation method comprises the following steps: mixing a seven-membered cyclic lysine derivative monomer with lactam, and carrying out hydrolytic polymerization by taking water as an initiator to obtain copolyamide; and placing the copolyamide in an acid solution, heating and stirring to carry out protonation reaction, and purifying the reaction product to obtain the antibacterial nylon material. The seven-membered cyclic lysine derivative monomer is an unprotected cyclic lysine monomer (aminocaprolactam), a single protected cyclic lysine monomer or a salified cyclic lysine monomer. The method can be widely applied to the fields with antibacterial requirements, such as fabrics, plates, pipes, packaging and various panels.

The invention discloses functional caprolactam, an intrinsic flame-retardant nylon material as well as a preparation method and application thereof, and relates to the technical field of flame-retardant nylon materials. The preparation method comprises the following steps: preparing an alpha-amino-epsilon-caprolactam intermediate by taking lysine as an initial raw material through one-step efficient cyclization, then reacting with a reagent containing a flame-retardant group to obtain functional caprolactam, and finally introducing the flame-retardant group into a side chain of nylon 6 by utilizing ring-opening copolymerization of the functional caprolactam and caprolactam to prepare the intrinsic flame-retardant nylon material. The flame-retardant nylon material can effectively avoid the migration and loss of the flame retardant, improve the dispersity of the flame retardant and enhance the flame-retardant effect, can keep the main chain structure of the nylon 6 unchanged, reduces the influence on the inherent performance of the nylon 6, is expected to directly replace the existing nylon 6 material, and is applied to the fields of automobiles, textiles, electronics and electrics, buildings, packaging and the like. In addition, a renewable lysine resource is used for partially replacing a petroleum resource, so that the method has the advantages of resource conservation, environmental friendliness, simple process, low cost and the like.

The invention discloses a flame-retardant nylon material as well as a preparation method and application thereof, relates to the technical field of flame-retardant high polymer materials, and solves the problems that a flame-retardant nylon material prepared by a blending method is unstable in flame-retardant effect and a flame-retardant nylon material prepared by a copolymerization method is complex in process. The preparation method comprises the following steps: carrying out ring-opening copolymerization on a seven-membered ring lysine derivative monomer formed by ring formation of lysine and other lactam monomers to obtain copolyamide with a functional group on a side chain, and reacting a reagent containing a flame-retardant group with the functional group to prepare the flame-retardant nylon material. The flame-retardant nylon material prepared by the invention can effectively avoid migration and loss of the flame retardant, improve the dispersity of the flame retardant and enhance the flame-retardant effect. Meanwhile, a renewable lysine resource is used for partially replacing a petroleum resource, so that the method has the advantages of resource conservation, environmental friendliness, simple process, low production cost and the like. The flame-retardant nylon material disclosed by the invention has lasting and stable flame-retardant performance and can be widely applied to the fields of automobiles, textiles, electronics and electricity, buildings, packaging and the like.

The invention discloses an ablation-resistant long-fiber reinforced nylon material for a battery pack, and relates to the technical field of nylon materials, the ablation-resistant long-fiber reinforced nylon material comprises the following raw material components by weight: 60-80 parts of nylon resin powder, 30-50 parts of a long-fiber reinforced material, 10-18 parts of aluminum diethylhypophosphite master batch, 8-15 parts of bromine-antimony composite master batch, 3-7 parts of montmorillonite, 12-20 parts of aluminum hydroxide, and 2-6 parts of nano-silica. The composite material is prepared from the following components in parts by weight: 1-4 parts of carbon nanotubes, 0.5-1.2 parts of an antioxidant I, 0.3-0.8 part of a lubricant I, 2-5 parts of a compatilizer, 0.1-0.4 part of a nucleating agent and 0.2-0.6 part of an anti-ultraviolet agent. By adding the diethyl aluminum hypophosphite master batch, the flame retardant property of the nylon material is improved, the processability of the nylon material is improved, the ablation resistance of the nylon material is improved, and the problems of insufficient flame retardant property, poor processability and poor ablation resistance of the nylon material can be solved.

The invention discloses a macromolecular antibacterial agent, an antibacterial nylon material as well as a preparation method and application thereof, and relates to the technical field of antibacterial macromolecular materials. According to the invention, lysine is used as a raw material, the polymer antibacterial agent is prepared through reactions such as dehydration ring formation and re-ring opening polymerization, the polymer antibacterial agent has the characteristics of high safety, biodegradability and good biocompatibility, and has the same polyamide main chain structure as nylon, the polymer antibacterial agent and nylon have good compatibility, and the polymer antibacterial agent and nylon 6 are fused and blended to form a nylon 6 sample. Through amide exchange reaction and hydrogen bond interaction between the macromolecular antibacterial agent and nylon 6 molecular chains, the antibacterial nylon material with excellent mechanical property and lasting and stable antibacterial effect is prepared, and the requirements of people for safety and environmental friendliness are met. The prepared antibacterial nylon material can be applied to antibacterial products such as textiles, daily necessities and packaging materials. Meanwhile, the macromolecular antibacterial agent and the antibacterial nylon material are simple in preparation process, low in raw material cost and suitable for industrial production.

The invention provides a halogen-free flame-retardant nylon material as well as a preparation method and application thereof. The halogen-free flame-retardant nylon material comprises the following components in parts by weight: 6-61 parts of polyamide resin A, 8-15 parts of a red phosphorus flame retardant, 1-5 parts of a melamine derivative and 20-50 parts of glass fibers, the polyamide resin A is semi-aromatic polyamide resin, and the melamine derivative comprises a combination of a melamine salt and a melamine condensate. The halogen-free flame-retardant nylon material provided by the invention is excellent in mechanical property and good in flame retardant property, and the ignition temperature of a glowing filament is greater than or equal to 775 DEG C.

The invention relates to the technical field of antibacterial high polymer materials, in particular to an antibacterial nylon material as well as a preparation method and application thereof. The method comprises the following steps: carrying out anion ring-opening copolymerization on a seven-membered ring lysine monomer obtained by ring formation of lysine and a lactam monomer to obtain copolyamide, dissolving the copolyamide, and carrying out complete quaternization reaction by using halogenated hydrocarbon to obtain the antibacterial nylon material. The preparation method provided by the invention effectively avoids the problems of insufficient antibacterial property, obvious mechanical property reduction, poor thermal stability and the like of an antibacterial nylon material prepared by hydrochloric acid protonation in the prior art. Meanwhile, the seven-membered cyclic lysine monomer can be copolymerized without alkylation, the synthesis process is greatly simplified, the production efficiency is high, and the production cost is low. The prepared antibacterial nylon material has the characteristics of lasting and efficient antibacterial performance, high safety, environment friendliness, excellent mechanical property and thermal stability and the like, and can be widely applied to the fields of textiles, daily necessities, packaging materials, panels and the like.

The invention discloses a double-85-resistant long carbon chain nylon material as well as a preparation method and application thereof. The double-85-resistant long carbon chain nylon material is prepared from the following components in percentage by mass: 5-12% of a compatilizer, 3-10% of epoxy resin, 3-10% of a nylon hot melt adhesive, 1-3% of a coloring agent, 0.2-1% of an antioxidant, 0.2-0.7% of a lubricant, 0.2-0.5% of a heat stabilizer and the balance of polyamide resin. Through the innovative material and process design, the bonding strength of the bonding layer between the long-chain nylon and the thermoplastic elastomer (TPE) can be remarkably improved, and it is ensured that the key connecting part can still maintain the excellent bonding performance without failure even though the key connecting part is subjected to long-term high-temperature, high-humidity and other extreme environments.

The invention belongs to the technical field of high polymer materials, and particularly relates to an antimony-free flame-retardant nylon material with high glowing filament temperature as well as a preparation method and application of the antimony-free flame-retardant nylon material. The invention relates to an antimony-free flame-retardant nylon material with high glowing filament temperature. The antimony-free flame-retardant nylon material is prepared from the following raw materials in percentage by weight: 70-74% of nylon 6 (PA6) resin, 16.5-18.5% of brominated flame retardant, 6-12% of phosphorus flame retardant, 0.5-1.5% of auxiliaries and 0.5-1% of black masterbatch. According to the invention, antimony trioxide is replaced by the phosphorus-based flame retardant, the phosphorus-based flame retardant and bromine are subjected to synergistic flame retardance, the flame retardance reaches UL94V0 (1.6 mm), a high glowing filament temperature GWIT850 DEG C can be obtained, and a glue opening of a black workpiece is not whitened.

The invention relates to the technical field of nylon materials, in particular to hydrophobic high-strength transparent nylon as well as a preparation method and application thereof. According to the preparation method, 3, 3 '-dimethyl-4, 4-diaminodicyclohexylmethane (MACM), aromatic diamine and fatty diacid are taken as reaction monomers, and the novel transparent nylon is obtained by adjusting the dosage ratio of the monomers and further adjusting the preparation process (regulating and controlling the reaction process). The transparent nylon provided by the invention has the advantages of hydrophobicity, high strength and high light transmittance. The technical problem that existing nylon is high in water absorption rate is solved. The hydrophobic transparent nylon provided by the invention can be used under the condition of high humidity, and has higher safety and longer service life; therefore, the application field of the transparent nylon is expanded.

The invention discloses flame-retardant anti-fouling copolymer nylon 6 and a preparation method and application thereof, and the preparation method comprises the following steps: adding a phosphorus-containing flame-retardant monomer, a silicon-containing reaction monomer, lactam, an initiator and a catalyst into a polymerization reaction kettle, and introducing nitrogen to replace air in the kettle; under the protection of nitrogen, firstly raising the temperature to 180-220 DEG C to carry out prepolymerization reaction, and then raising the temperature to 240-260 DEG C to carry out polymerization reaction; and after the polymerization reaction, removing water vapor in the system to react in a normal pressure state, then vacuumizing to react, filling nitrogen to recover to normal pressure after the reaction is finished, and discharging and cooling to obtain the flame-retardant and anti-fouling copolymer nylon 6. The phosphorus-containing comonomer and the silicon-containing comonomer are introduced into the copolymerized nylon, the intrinsic flame-retardant nylon material with high flame-retardant efficiency and permanent flame retardance is prepared through melt copolymerization at a relatively low introduction amount, and the intrinsic flame-retardant nylon material has certain hydrophobic and anti-fouling properties and also retains good mechanical properties and spinnability of the nylon material.

The invention discloses a halogen-free flame-retardant nylon material which comprises PA (polyamide), a toughening agent, a P-series flame retardant, an N-series flame retardant, modified polyhedral oligomeric silsesquioxane and a derivative flame-retardant synergist of the modified polyhedral oligomeric silsesquioxane. The modified polyhedral oligomeric silsesquioxane and the derivative flame-retardant synergist thereof contain boron, an annular structure R2 with the carbon hydrogen ratio larger than 1 and two inorganic silicon cage cores, and the structures form a carbon layer, a ceramic barrier layer, a protective film or a heat-insulation coke layer and other protective layers in the combustion process, so that the anti-dripping effect is greatly improved, and meanwhile, the anti-dripping effect is greatly improved. Heat and oxygen transfer is isolated, combustible gas release is reduced, and the flame retardant property of the material is remarkably improved under the combined action of multiple mechanisms. Furthermore, the flame retardant synergist of the modified polyhedral oligomeric silsesquioxane and the derivative of the modified polyhedral oligomeric silsesquioxane is matched with the P-series flame retardant and the N-series flame retardant to realize synergistic flame retardance, so that the flame retardant property of the flame-retardant nylon material is improved while the dosage of the flame retardant is reduced. The halogen-free flame-retardant nylon material provided by the invention is excellent in flame retardance.

The invention discloses a glass fiber reinforced nylon material with high alcoholysis resistance, and relates to the technical field of glass fiber reinforced nylon materials. Raw materials of the high-strength and high-toughness composite material comprise the following components in parts by weight: 30-43 parts of PA46, 20-25 parts of PA66, 15-7 parts of PA115, 3-5 parts of bio-based nylon, 20-45 parts of alkali-free glass fibers, 1-3 parts of polyethylene, 0.5-3 parts of an antioxidant, 0.2-3 parts of a heat stabilizer, 0.1-5 parts of a compatilizer, 1-5 parts of a flexibilizer, 0.2-0.5 part of a hydrolysis-resistant agent, 1-2 parts of an ultraviolet light absorber, 0.1-2 parts of a silane coupling agent, 0.1-0.5 part of a nucleating agent, 1-5 parts of hollow glass beads and 3-8 parts of mica. The glass fiber reinforced nylon material is prepared by mixing the raw materials according to the set proportion and sequence, the glass fiber reinforced fiber material with high alcoholysis resistance is finally obtained, a small amount of mica is added into the matrix raw materials, the insulativity and heat resistance of the prepared glass fiber reinforced nylon material are improved to a certain extent, and the service life of the glass fiber reinforced nylon material is prolonged. The range of products made of the material is expanded, the stability of the products is improved, and the products can resist corrosion of strong acid and strong alkali.

The present invention discloses a bromine-based flame-retardant reinforced nylon material and a preparation method thereof, and belongs to the technical field of engineering plastics. The bromine-based flame-retardant reinforced nylon material of the present invention is compounded with specific zirconium hydroxide and hydrotalcite to solve the problem of acidic corrosive gas from both physical and chemical aspects, improve the stability of the bromine-based flame-retardant nylon resin system, and enable the product to have good high temperature aging resistance. The present invention also discloses a preparation method of the product and its application in the preparation of electronic and electrical products.

The invention relates to the technical field of nylon, and discloses flame-retardant fireproof high-temperature-resistant nylon and a preparation method thereof. According to the invention, nylon 6, a montmorillonite-copper complex flame retardant and the like are extruded and granulated in a twin-screw extruder to obtain the flame-retardant fireproof high-temperature-resistant nylon. After surface organic modification, montmorillonite has good compatibility with nylon 6, the tensile strength of the material is increased, the flame retardant contains phosphate groups and more nitrogen-containing ureido and phenanthroline structures to form a nitrogen-phosphorus flame retardant, and meanwhile, the flame retardant contains a salicylic acid-phenanthroline-copper complex structure to catalyze charring of a nylon matrix at high temperature, so that the flame retardant has excellent flame retardancy. The flame retardance of the nylon material is remarkably improved, the UL94 grade reaches the V0 grade, the limit oxygen index is increased, the residual carbon amount at high temperature is increased, and the high-temperature resistance of the material is improved.

The invention relates to the technical field of nylon materials, and discloses a low-moisture-absorption 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: 40-50 parts of nylon 66, 35-55 parts of modified nylon 6, 25-35 parts of reinforcing filler, 0.5-2 parts of a lubricant and 0.5-1 part of an antioxidant, the nylon 66 / modified nylon composite material is prepared by taking nylon 66 and modified nylon 6 as substrate materials, adding auxiliaries such as reinforcing filler, mixing, extruding and granulating, the modified nylon 6 is introduced, so that the toughness of the composite material is improved, and the water absorption rate is reduced; due to the introduction of the reinforcing filler, the synergistic effect of halloysite and boron nitride can be utilized, the flame retardant property of the composite material is improved, and the water absorption rate is further reduced.

The invention relates to the field of nylon materials, provides a high-performance, scratch-resistant, wear-resistant and corrosion-resistant nylon material replacing steel with plastic, and solves the problem that an existing nylon material is insufficient in scratch resistance, wear resistance and corrosion resistance. The material is prepared from a surface modified calcium fluoride and aluminum oxide whisker filler, polytetrafluoroethylene coated boron nitride particles, nylon matrix resin, a compatilizer, an antioxidant and a lubricant. The dispersibility and the interface compatibility of the key components are improved by adopting a special preparation process, so that the mechanical property, the wear resistance and the chemical stability of the composite material are remarkably enhanced. The material is suitable for metal replacement application in the fields of automobiles, machinery and the like, realizes excellent scratch resistance and wear resistance, solves the problem of poor corrosion resistance of nylon materials, and has wide application value.

The utility model discloses a portable code scanner, which comprises a code scanner body and a display screen, one side of the code scanner body is fixedly provided with a connecting retaining ring, one side of the connecting retaining ring far away from the code scanner body is connected with a hanging belt, the hanging belt is made of nylon materials, and the outside of the hanging belt is fixedly provided with a magnetic buckle. A wrist strap is fixed to the tail end of the hanging strap and made of rubber, an adjusting strap buckle is arranged outside the wrist strap, and the display screen is fixed to the top end of the code scanner body. Compared with an existing code scanner, the portable code scanner is provided with the hanging carrying mechanism, a user can conveniently carry the portable code scanner, the portable code scanner is not prone to being lost and not prone to being taken out of a working place accidentally, the practicability of the portable code scanner is improved, meanwhile, the portable code scanner is provided with the light supplementing and distance measuring mechanism, and the portable code scanner is convenient to use. When the ambient light is relatively dark, the device can supplement light for the bar code, and can guide a user to scan the bar code at a proper distance, thereby facilitating the improvement of the success rate of code scanning.

The invention relates to the technical field of nylon materials, in particular to a high-performance high-leakage-index flame-retardant reinforced nylon material and a preparation method thereof. The invention relates to a flame-retardant reinforced nylon material with high performance and high leakage index. The flame-retardant reinforced nylon material comprises the following materials in parts by weight: 45-50 parts of polyamide PA66, 30-35 parts of modified glass fiber, 1-3 parts of a flexibilizer, 10-15 parts of a flame retardant, 0.2-0.4 part of an antioxidant, 0.1-1 part of a nucleating agent, 0.2-0.4 part of a lubricant, 1-3 parts of a hydrolysis-resistant agent and 1-3 parts of a CTI modifier. The invention discloses a high-performance high-leakage-index flame-retardant reinforced nylon material and a preparation method thereof, and aims to improve the flame retardant property and the electrical insulation property of the nylon material by optimizing the variety and the proportion of raw materials.

The invention discloses an enhanced monomer casting nylon material and a preparation method thereof, and relates to the technical field of high-molecular compounds, in particular to a high-molecular compound obtained by reaction except for carbon-carbon unsaturated bond, the nylon material comprises caprolactam, glass fiber, resin particles, graphene powder and an antibacterial agent, by utilizing the high strength of the glass fiber and the resin particles, the texture of the nylon material is tighter, an attachment site is provided for the antibacterial agent when the nylon material is combined with the caprolactam, the antibacterial agent and the caprolactam can have firmer combining capacity, the compact material structure can resist corrosion, and the service life of the antibacterial agent is prolonged. The corrosion resistance and the antibacterial property of the monomer casting nylon are improved, and the defect that the corrosion resistance and the antibacterial property are insufficient in the monomer casting nylon process is overcome; the silver ion antibacterial agent is tightly combined with the graphene, so that the release speed of the silver ion antibacterial agent can be slowed down, and a stable antibacterial effect can be realized.

The invention belongs to the technical field of nylon materials, and particularly relates to a high-heat-resistance halogen-free flame-retardant nylon material and a preparation method thereof. According to the invention, PA6 and PA66 base materials are compounded by utilizing the high heat resistance of PA66 and the processability advantage of PA6, and the heat deformation temperature of the material is improved through the synergistic effect of the modified glass fiber reinforcing agent and the antioxidant, so that the heat-resistant requirements of high-end scenes such as new energy automobile battery components and high-temperature electronic components are met. Halogen flame retardants are completely abandoned, the modified halogen-free flame retardant is adopted, the flame retardant effect is achieved, meanwhile, no harmful halogen hydride gas or dioxin is released during combustion, and the material still keeps excellent rigidity and toughness on the basis of high flame retardance and high heat resistance and is suitable for popularization and application. The problem that the mechanical property of a traditional halogen-free flame retardant is reduced due to high addition amount is solved.

The invention provides a blow molding grade hydrogen storage tank liner material and a preparation method thereof, and relates to the technical field of high polymer material modification. The material comprises the following components in percentage by weight: 48-78% of PA resin; 20 to 50 percent of toughening master batch; 0.5-3% of an ethylene vinyl alcohol copolymer; 0.5-3% of an inorganic filler; 0.1%-1% of a chain extender; 0.4 to 0.8 percent of lubricating agent; 0.2 to 0.5 percent of an antioxidant; during preparation, the maleic anhydride copolymer and the PA resin are prepared into the toughening master batch, then the PA resin, the toughening master batch, the ethylene-vinyl alcohol copolymer, the inorganic filler, the lubricant and the antioxidant are mixed to prepare a PA composite material semi-finished product, and finally the PA composite material semi-finished product and the chain extender are mixed to prepare the blow molding grade hydrogen storage tank liner material. The PA resin material with better hydrogen barrier property is matched with the high-barrier component to improve the hydrogen permeability of the nylon material, and the viscosity of the PA composite material is improved through tackifying of the chain extender and preparation of the toughening master batch, so that the hydrogen storage tank liner is formed by adopting a blow molding process.

The invention relates to the field of nylon materials, in particular to a high-temperature-resistant nylon / PTFE composite material and a preparation method and application thereof. The high-temperature-resistant nylon / PTFE composite material is prepared from the following raw materials in parts by weight: 40 to 90 parts of modified nylon, 0.5 to 15 parts of polytetrafluoroethylene, 5 to 15 parts of composite filler, 1 to 3 parts of compatilizer and 0.1 to 0.3 part of antioxidant, the composite filler comprises modified calcium fluoride whiskers, modified glass beads and modified hexagonal boron nitride. Through collaborative design of multiple performance dimensions such as interface, heat resistance, wear resistance, mechanics and the like, the composite material has excellent high-temperature stability, low-friction wear resistance and high-strength mechanical performance at the same time, has remarkable breakthrough in comprehensive performance and service life compared with a traditional nylon-based composite material, and has extremely high technical innovation and practical value.

The utility model relates to a coating fixing device special for a coated anti-corrosion steel strand. The utility model discloses a coating fixing device special for a film-coated anti-corrosion steel strand. The coating fixing device is a split barrel, and three positioning holes are formed in the coating fixing device. The first positioning hole and the second positioning hole are both provided with walking positioners, the walking positioners are made of nylon materials, the diameter of the walking positioners is the same as that of the steel strand body, and bearing bases are arranged outside the walking positioners. The film-coated anti-corrosion steel strand produced by the special coating fixing device for the film-coated anti-corrosion steel strand disclosed by the utility model is anti-corrosion in all directions, wear-resistant and good in ductility, and can change along with the change of the steel strand.

The invention discloses a thin-wall sheath cable and a rapid forming process thereof, and the thin-wall sheath cable comprises a cable core, an insulating layer wrapping the cable core, and a sheath at the outermost layer. Wherein the cable core is formed by twisting a plurality of copper single wires; the insulating layer is made of a flame-retardant cross-linked polyethylene material; the sheath is made of a modified nylon material. Printing marks of the thin-wall sheath cable body are arranged on the insulating surface, the insulating layer and the sheath are extruded in a segmented mode, and the cable is formed at a time. The thin-wall sheath cable has the characteristics of flame retardance, environmental protection, wear resistance, small outer diameter, light weight, fast heat dissipation, large relative current-carrying capacity, easiness in pipe penetrating construction and the like.

The invention belongs to the technical field of melt traction, and discloses a nylon melt traction device for a screw extruder, which comprises a limiting guide rail mounted at the tail end of a cooling water tank, and further comprises a support part, a traction part and a traction part, the clamping traction assembly is mounted on the supporting piece; according to the scheme, the two sets of clamping plates are placed on the two sides of the drooping nylon melt, the two sets of clamping plates are pressed to move oppositely under limiting of the supporting pieces so that the nylon melt located between the two sets of clamping plates can be clamped, cooling water is prevented from adhering to the ribs, and then an operator drags the melt into the cooling water tank through the clamping plates; and finally, the bottom of the supporting piece is buckled into the limiting guide rail and fixed by the elastic clamping pin, then the two sets of clamping plates are separated under the elastic force action of the telescopic liquid pumping mechanism, meanwhile, an operator can hold the cooled nylon material with the hand and feed the nylon material into a pelletizer, and then the situation that melt is accumulated is avoided.

The invention discloses an easy-to-bend copper bar cable which comprises a flat copper bar conductor with the section thickness of 2.95 mm to 3.05 mm, the section width of 15.90 mm to 16.10 mm and the sectional area of 48 mm < 2 >, and an insulating layer which is made of a nylon material and wraps the copper bar conductor, the average thickness of the insulating layer is 0.55 mm to 0.65 mm, the minimum local thickness of the insulating layer is larger than or equal to 0.48 mm, the height of the outer contour of the insulating layer is 4.2 mm, and the thickness of the outer contour of the insulating layer is 4.2 mm. The width of the insulating layer is 17.2 mm, and the surface roughness Ra of the insulating layer is less than or equal to 0.8 [mu] m. The electric connector has the characteristics of temperature resistance, aging resistance and chemical corrosion resistance, supports customized designs such as end stamping and tin plating, is convenient to mount, reduces the occupied space by 30%, and remarkably improves the reliability and durability of electrical connection and the system integration efficiency.

The invention discloses an efficient and energy-saving granulator for PA66 nylon material production, and relates to the field of nylon material production, the efficient and energy-saving granulator comprises a granulator body, an external heat storage cavity and a heat conduction pipe fitting, the external heat storage cavity is fixedly installed on the outer side of the granulator body, and the upper end of the external heat storage cavity is in butt joint with the heat conduction pipe fitting in a penetrating mode; and the heat conduction pipe fitting is in butt joint with the outer side of the granulator body. According to the efficient and energy-saving granulator for PA66 nylon material production, the self-adaptive movable structure is arranged, heat formed in the granulator body is recycled and conducted through the self-adaptive movable structure, and heat stored in the granulator body is stably released and supplied to the outer side of a forming and discharging channel through a supply butt joint pipe; and then the outer side of the discharged material is subjected to thermal constant-temperature treatment, the phenomenon that the material is broken when making direct contact with cold air is avoided, and heat conduction and recycling work is effectively conducted through large heat generated by equipment work.

The invention discloses a low linear expansion coefficient glass fiber reinforced nylon material and a preparation method, and relates to the technical field of polymer composites.The low linear expansion coefficient glass fiber reinforced nylon material is prepared from, by weight, 20-45 parts of glass fiber, 20-60 parts of synthetic polymer and 15-30 parts of additive A. The synthetic polymer is nylon resin, and the additive A is a flexibilizer; the flexibilizer is an acrylamide-acrylic acid-1-ethyl-3-methylimidazolium ethyl sulfate random copolymer, and by preparing the modified carbonized polyimide compound, the tensile strength, the bending strength and the impact toughness are enhanced, the specific strength and the specific stiffness are good, and the electrical insulation performance and the heat-resistant insulation performance are excellent; the problems that the material cannot be used and is easy to crack and cannot be insulated and heat-preserved under extreme temperature conditions are solved.

The invention discloses a full-bio-based multifunctional antibacterial nylon material as well as a preparation method and application thereof, relates to the technical field of high-molecular polymers, and solves the problems that the preparation process of a nylon material in the prior art depends on petroleum resources, the function is single and the application scene is limited. The method comprises the following steps: reacting an aminocaprolactam solution with corresponding aldehyde / carboxylic acid / halogenated alkane, and purifying to obtain a cyclic lysine derivative monomer M; the preparation method comprises the following steps: mixing and heating a cyclic lysine derivative monomer M, an initiator and a catalyst, reacting, and purifying to obtain a nylon material PM; and carrying out quaternization reaction on the nylon PM solution and alkyl halide, and purifying to obtain the full-bio-based multifunctional nylon material P. The preparation method completely abandons the use of petroleum-based raw materials, realizes the multifunctional synergistic effect of antibacterial property, biocompatibility, antibacterial biofilm property, thermosensitivity and the like, and can be applied to the fields of antibacterial materials, biomedical materials, antibacterial biofilms and thermosensitivity materials.