645 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 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 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 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 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 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 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 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 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 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 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.

The invention relates to the technical field of nylon materials, and discloses a thermo-oxidative aging resistant bio-based nylon thermal insulation material and a preparation method thereof. The thermo-oxidative aging resistant bio-based nylon thermal insulation material is prepared from the following raw materials in parts by weight: 45 to 55 parts of bio-based nylon material, 5 to 8 parts of glass fiber, 8 to 12 parts of flexibilizer, 3 to 6 parts of functional organic silicon, 0.02 to 0.05 part of antioxidant, 1 to 2 parts of lubricant and 0.5 to 2 parts of coupling agent, the material is prepared by taking bio-based nylon as a main matrix, adding glass fibers, a toughening agent, functional organic silicon, an antioxidant and other functional aids, mixing and then extruding, and the functional organic silicon and the antioxidant have a synergistic effect, so that the thermo-oxidative aging resistance of the matrix is improved.

The invention discloses an antibacterial nylon 6 material as well as a preparation method and application thereof, relates to the technical field of nylon materials, and solves the problem that the antibacterial property and the mechanical property of nylon are difficult to consider at the same time. The material has a structure shown as a formula (I), R1 and R2 are independently selected from one of C1-24 linear chain / branched chain aliphatic groups, substituted / unsubstituted C3-12 alicyclic hydrocarbon groups / C6-18 aryl groups / C7-30 aralkyl groups, or R1 and R2 on the same N and connected N form 5-7-membered saturated / unsaturated heterocyclic rings; and each E-group is independently selected from the structural general formula (II). Each R3 is independently selected from one of C1-24 linear chain / branched chain aliphatic groups, substituted / unsubstituted C3-12 alicyclic hydrocarbon groups, C6-18 aryl groups and C7-30 aralkyl groups; x is an integer selected from 1 to 18; m is equal to 0.01-0.50, and m + n is equal to 1. The antibacterial nylon 6 material has a broad-spectrum and efficient antibacterial effect, is lasting in antibacterial effect and excellent in mechanical property, and can be used for preparing textiles, daily necessities, building materials, packaging materials or panels. # imgabs0 #

The invention relates to nylon with excellent heat-conducting property and a preparation method, and belongs to the technical field of nylon materials. The nylon comprises nylon resin, a modified heat-conducting filler, a compatilizer, an antioxidant and a lubricant. The preparation method of the modified heat-conducting filler comprises the following steps: putting a mixed material into water, stirring, performing ultrasonic dispersion, adding aluminum nitrate hexahydrate, heating, purifying, and drying to obtain a composite filler; stirring and dispersing the composite filler and ethanol, adding a silane coupling agent, stirring, purifying and drying to obtain an intermediate; and stirring and mixing the intermediate and ethanol, adding styrene, a monomer and an initiator, heating and stirring, purifying, and drying to obtain the product. The nylon resin is adopted as a matrix, boron nitride, aluminum oxide and graphene nanosheets are combined and organically modified, and maleic anhydride grafted polypropylene is used as a compatilizer, so that the heat-conducting property and the comprehensive mechanical property of the nylon tube are effectively improved.

The invention provides a high-performance nylon material and a preparation method thereof. The high-performance nylon material comprises the following components in parts by weight: 30-65 parts of polyamide 66; 5 to 25 parts of special nylon resin; 30 to 35 parts of glass fiber; 0.2 to 0.4 part of an antioxidant; 0.4 to 0.8 part of a lubricant; 1 to 3 parts of compatilizer; 5-15 parts of a wear-resistant auxiliary agent; 0.6 to 1.0 part of a weather-proof auxiliary agent; and 0.3 to 0.7 part of black master batch. The nylon material prepared by the invention is suitable for performance requirements of outdoor precision bearings, and has excellent performances of low friction coefficient, low abrasion, high strength, high modulus, long-period weather resistance, long-period high temperature and high humidity resistance and the like.

The invention relates to a high-strength antiskid nylon material and a preparation method thereof. The high-strength antiskid nylon material comprises the following components in parts by mass: 50-80 parts of nylon, 20-40 parts of modified glass fibers, 5-15 parts of epoxy modified inorganic particles, 0.5-2 parts of an initiator and 2-10 parts of an auxiliary agent, wherein the modified glass fiber is obtained by reacting glass fiber with polyethyleneimine. The epoxy modified inorganic particles are obtained by reacting an epoxy silane coupling agent with inorganic particles and then mixing with glycidyl acrylate. The modified glass fiber, the epoxy modified inorganic particles and other components are compounded with nylon, so that the strength, toughness and other mechanical properties of the product are guaranteed, meanwhile, the material is endowed with better wear resistance and skid resistance and better comprehensive performance, and the problems in the prior art are solved.

The invention discloses an oxidation-resistant monomer casting nylon material and a preparation method thereof, and relates to the field of material preparation, and the monomer casting nylon material is applied to a high-temperature and oxygen-enriched environment and comprises the following components in parts by mass: 100 parts of caprolactam; 0.1-0.3 part of a catalyst which is one of sodium hydroxide, potassium hydroxide or lithium hydroxide; 0.5 to 1.5 parts of an activating agent, wherein the activating agent is N-acetyl caprolactam; 0.7 to 3 parts of a main antioxidant, wherein the main antioxidant comprises a hindered phenol antioxidant and a thioester antioxidant; 0.1-0.5 part of an auxiliary antioxidant, which is a metal deactivator; 1-3 parts of an inorganic filler which is modified montmorillonite; and 0.5-2 parts of a hydrophobic agent which is a silane coupling agent. By constructing a composite anti-oxidation system, multi-level synergistic protection can be formed for three key oxidation stages of free radical initiation, peroxide accumulation and metal catalysis, and a full path of an oxidation chain reaction is covered from a molecular level, so that the aging process of the material is remarkably delayed, and the service life of the material is prolonged. And high oxygen resistance and relatively long service life are provided for nylon application under severe working conditions.

The invention relates to the technical field of photovoltaic connector manufacturing, in particular to a temperature control forming process of a photovoltaic nylon connector mold and a composite runner, the mold is divided into a fixed mold area, a movable mold area, a mold cavity area, a mold core area and a pouring gate area, and each area is provided with an independent temperature control loop. According to different requirements of the mold filling state and the cooling stage of nylon materials, the temperature of each area of the mold is dynamically adjusted, the mold temperature is properly increased in the initial mold filling stage, a cavity is rapidly filled with melt, and along with mold filling, the mold temperature is gradually reduced, and melt cooling and crystallization are accelerated. According to the temperature control forming process of the photovoltaic nylon connector mold and the composite runner, the phase change energy storage material is embedded in the fixed mold area of the mold, and the heat absorption and release characteristics of the phase change energy storage material during phase change are used for assisting temperature control, so that the problem of embrittlement or insufficient strength caused by non-uniform crystallization of a product in a traditional process is solved; and the photovoltaic connector is ensured to have good mechanical property and weather resistance in long-term use.

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 present invention discloses a high-strength, low-precipitation halogen-free flame-retardant polyamide composition and its preparation method. The composition comprises the following raw materials, measured by weight: 26-89.98% polyamide resin; 10-35% filler; 0.01-25% flame retardant; 0.01-10% modified synergistic flame retardant; 0-1% antioxidant; 0-2% processing aid; and 0-1% masterbatch. This invention addresses the "pain point" of halogen-free flame-retardant nylon materials, which are prone to precipitation. Based on the structural characteristics of nylon materials, the present invention introduces a flame retardant with a novel structure in the formulation design to balance the char layer thickness and char layer fluidity during the combustion process, thereby improving the flame retardant efficiency. Furthermore, a modified synergist is introduced, and the synergistic effect of the synergist and the flame retardant further enhances the flame retardant efficiency. Surface treatment of the synergist increases its compatibility with the polyamide resin, avoiding the risk of precipitation.

This invention discloses a highly efficient synergistic halogen-free flame-retardant nylon material and its preparation method. Specifically, it is prepared from 57-60 parts by weight of nylon resin, 30 parts by weight of short glass fibers, 10-13 parts by weight of halogen-free flame retardant, 1-3 parts by weight of wollastonite mineral fibers, 0.2-0.5 parts by weight of antioxidant, 0.2-0.5 parts by weight of lubricant, and 0.2-0.4 parts by weight of coupling agent. The material prepared by this invention, through the addition of wollastonite mineral fibers, forms a synergistic flame-retardant effect with the halogen-free flame retardant, which not only improves the flame-retardant performance of the material but also improves its flowability and dimensional stability, reduces the exposure of glass fibers, and enhances the mechanical properties of the material. Furthermore, wollastonite mineral fibers are inexpensive, which can reduce the cost of composite materials, making it very suitable for halogen-free flame-retardant nylon materials and enabling large-scale promotion and use.

The invention discloses a refrigerating fluid-resistant nylon material applied to a heat management system of a new energy automobile and a preparation method of the refrigerating fluid-resistant nylon material. The refrigerating fluid-resistant nylon material is prepared from the following raw materials in percentage by weight: 37-89.98% of nylon resin; 10 to 55% of modified glass fiber; 0.01 to 5% of a compatilizer; 0.01 to 1% of an antioxidant; 0-2% of other additives; the surface of the glass fiber is subjected to sizing treatment through a solution containing epoxy siloxane, and the mass fraction of a sizing agent is larger than 0.3%. The nylon material prepared by the invention has excellent mechanical properties, long-term thermo-oxidative aging resistance and freezing liquid resistance, and can be used for parts such as PTC (Positive Temperature Coefficient) outer plates of automobile thermal management systems, thermostats, water valves and the like.

The utility model discloses a raw material mixing device for nylon material processing, which is applied to the technical field of nylon material processing and comprises a container tank, a motor is mounted on one side of the top of the container tank, and a fixing rod is fixedly connected into the container tank; hot oil or hot water is injected into the top of a fixed rod, so that the hot oil or hot water circulates in an S-shaped bent pipe, and a rotating cylinder rod drives the S-shaped bent pipe to rotate on the surface of the fixed rod to stir the nylon raw materials and heat the interiors of the nylon raw materials at the same time, so that the heating uniformity during mixing of the nylon raw materials is improved, and the mixing efficiency is improved; the mixing rods are driven by the fixing shell to mix and stir the nylon raw materials in the container tank, and meanwhile the mixing rods are driven to rotate on the two sides of the fixing shell to stir and mix the nylon raw materials in the other direction, so that the stirring and mixing uniformity of the nylon raw materials is guaranteed, and the practicability is improved.