208results about How to "High modulus" patented technology

The invention relates to the technical field of production of automobile roofs, and particularly discloses a fiber-reinforced thermoplastic composite automobile interior ceiling and a preparation method thereof. A fiber-reinforced thermoplastic composite material automotive interior ceiling comprises a base material and a fabric, and the base material sequentially comprises a bottom layer non-woven fabric, a first adhesive film, a blend fiber felt and a second adhesive film from bottom to top; the blend fiber felt is made of reinforced fibers and thermoplastic fibers through a non-woven process. The preparation method comprises the following steps of: preparing the base material by a dry method, forming the framework and compounding the fabric by using a set of mold to obtain a ceiling prototype, and then punching by using a cold mold and integrally curling and covering the base material and the fabric of the skylight opening to obtain the ceiling. The automobile interior ceiling made of the fiber-reinforced thermoplastic composite material has excellent dimensional stability and is more low-carbon and environment-friendly, and raw material leftover materials generated in the production process and products produced after the life cycle is ended are easy to recycle.

The invention relates to the technical crossing field of polyphenylene sulfide fiber paper, special papermaking and insulation paper, in particular to high-temperature-resistant polyphenylene sulfide fiber composite insulation paper and a preparation process thereof. The high-temperature-resistant polyphenylene sulfide fiber composite insulation paper with a dense structure similar to reinforcing steel bar-mortar is prepared by preferably selecting the polyphenylene sulfide fiber with higher cost performance as a raw material and taking the aramid fibrid as a filling agent and an adhesive and adopting a wet papermaking process. The prepared composite paper has excellent temperature resistance and chemical corrosion resistance, the production process flow is short, the production process is free of pollution, the industrial production cost of the composite paper can be reduced, the temperature resistance and chemical stability of medium-and-low-end application insulation paper are improved, the application field of the composite paper in a more severe environment is widened, and the composite paper has good application prospects. Good economic benefits and application values are realized.

The invention relates to a micro-nano aggregate based on silanized calcium sulfate whisker in-situ polymerization, the main component of the micro-nano aggregate is acrylate copolymerized CSW / NS-GO, and the preparation method comprises the following steps: loading nano silicon dioxide on the surface of calcium sulfate whisker to obtain CSW / NS; carrying out silanization modification on CSW / NS; preparing graphene oxide by a Hummers method; and carrying out in-situ polymerization to prepare the acrylate copolymerized CSW / NS-GO. Calcium sulfate whiskers are loaded and bonded with epoxy modified nano silicon dioxide and then subjected to in-situ polymerization with graphene oxide in an acrylic monomer, a polymer chain is tightly combined with a functional group of CSW / NS-GO, good interface bonding is formed, and the strength and toughness of the composite material are improved. The acrylate copolymerized CSW / NS-GO has a microscopic three-dimensional network structure and excellent stability, so that the internal structure of the concrete is more compact, the porosity is reduced, the permeation of water is prevented, and the invasion of harmful substances such as chloride ions and sulfate ions into channels is reduced, thereby reducing the structural damage caused by environmental factors such as dry-wet cycle and freeze-thaw cycle; the durability of the concrete is improved.

The invention provides an ocean engineering anticorrosive coating and a preparation method thereof, and belongs to the technical field of coatings. The coating is prepared from the following raw materials: fluorocarbon resin, modified synthetic mica, modified basalt fibers, modified carbon nanotubes, nano silicon dioxide, nano zinc oxide, nano titanium dioxide, carbon fibers, zinc phosphate, hydroxyl-terminated polybutadiene, a plant extract, organic tin and the like. The modified synthetic mica and the modified carbon nanotubes are modified by adopting pentaerythritol stearate, cellulose nitrate and sodium hexametaphosphate; the modified basalt fiber is modified by adopting sodium stannate, polyvinyl alcohol and sodium hexametaphosphate; the plant extract is ethanol percolation extract of kandelia candel leaves and mangnolia officinalis leaves. All the components are used in a matched mode according to a certain proportion, and the advantages of being excellent in anti-corrosion performance, good in mechanical performance, excellent in anti-aging performance, environmentally friendly and the like are achieved.

The invention provides a polymer alloy material, a preparation method thereof and a flow cell panel frame, and belongs to the technical field of high polymer materials. The polymer alloy material comprises the following components: 25-80% of polyolefin, 10-20% of engineering plastic, 1-5% of a compatilizer, 5-50% of an inorganic filler and 0.1-5% of an auxiliary agent. Wherein the engineering plastic is selected from one or more of a styrene methyl methacrylate copolymer, a styrene-butadiene methyl methacrylate copolymer, polycarbonate, polyphenyl ether, polyphenylene sulfide, a styrene-maleic anhydride copolymer or a styrene-acrylonitrile copolymer. The polymer alloy material forms a bicontinuous phase structure with'sea-sea 'microscopic dispersion characteristic and tight interface bonding, can simultaneously have the characteristics of excellent heat resistance, corrosion resistance, high flow, low shrinkage, high modulus and the like, and makes up for the defect of insufficient performance of the existing liquid flow cell panel frame plate PP material.

The invention discloses shell-imitated mechanically-enhanced photonic crystal paper, a preparation method thereof and application of the shell-imitated mechanically-enhanced photonic crystal paper in repeatable printing. The photonic crystal paper is prepared from a zirconium phosphate layered material and soft gel through blade coating shear force induced self-assembly alternate arrangement. The photonic crystal paper disclosed by the invention has a shell-imitated brick mud structure, and meanwhile, zirconium phosphate and soft gel have a strong hydrogen-bond interaction, so that the photonic crystal paper has high tensile strength, high flexibility, high modulus and self-supporting property, and can support repeated printing. When an aqueous solution containing a hygroscopic solute is used as ink to carry out ink-jet printing on the photonic crystal paper, the gel matrix is swelled, the lattice spacing is increased, and a lasting multi-color printing effect is achieved. The selected zirconium phosphate layered material has good thermal stability, and meanwhile, the brick mud structure can reduce the oxygen transmittance, so that the photonic crystal paper has flame retardant property, and the storage safety is improved. The blade coating method is simple and rapid, so that continuous production of the photonic crystal paper can be realized.

The invention discloses a high-thermal-conductivity polypropylene composite material and a preparation method thereof, and belongs to the technical field of high polymer material modification. The high-thermal-conductivity polypropylene composite material comprises the following components in parts by mass: 70-80 parts of polypropylene resin; 20 to 30 parts of graphene oxide; 0.1 to 0.5 part of a double-walled carbon nanotube; 5 parts of maleic anhydride grafted polypropylene; and 1 part of an auxiliary agent. Wherein the adopted graphene oxide has a two-position structure, the double-walled carbon nanotube has a one-dimensional structure, and both the graphene oxide and the double-walled carbon nanotube have very high heat conductivity coefficients; when the two materials are added into polypropylene at the same time, the micro-content of the double-walled carbon nanotube with the one-dimensional structure plays a role in lapping in the melt blending process, and forms a network structure together with the graphene oxide with the two-dimensional structure, so that the heat-conducting property of the polypropylene composite material is greatly improved.

The invention relates to a preparation method of a multi-scale SiC particle heterostructure reinforced magnesium-based composite material, and belongs to the field of metal-based composite materials and preparation thereof. According to the preparation method, an in-situ authigenic second phase generated by rare earth elements is added, micron-scale, submicron-scale and nano-scale SiC reinforcement particles form a heterostructure formed due to size difference, and after a subsequent plastic deformation process, the multi-scale reinforcement particles form a heterostructure with a layered distribution characteristic; the effects of second phase strengthening, reinforcement particle strengthening and heterostructure strengthening are generated, and meanwhile the modulus and strength of the magnesium-based composite material are improved. And moreover, a stirring casting mode is adopted for preparation, the production process is shortened, the production cost is reduced, the high-modulus and high-strength magnesium-based composite material is prepared, and the preparation method has important significance in promoting application of the high-performance magnesium-based composite material and expanding the application range of the magnesium-based composite material in the fields of automobile industry, aerospace and the like.

The invention discloses a modified asphalt composition, a preparation method thereof and a modified asphalt waterproof coiled material. The modified asphalt composition comprises the following raw material components in parts by weight: 40-50 parts of composite asphalt; 8 to 10 parts of softening oil; 5 to 7 parts of SBS (Styrene Butadiene Styrene); 1 to 1.5 parts of carbon fiber; 10 to 15 parts of rubber powder; 1-2 parts of an auxiliary agent; 15 to 25 parts of a filling material; wherein the carbon fibers and the SBS are interwoven to form a modified network, and the mass ratio of the carbon fibers to the SBS is 1: (4-6); the mass ratio of the carbon fibers to the composite asphalt is 1: (27-40); the mass ratio of the carbon fiber to the auxiliary agent is 1: (0.7-2). According to the modified asphalt composition, through the synergistic effect of the composite asphalt, the carbon fibers and the SBS, the mechanical property of the modified asphalt composition is guaranteed, meanwhile, the high-temperature stability of the modified asphalt composition is improved, and the influence on a waterproof material during thermal pavement of a pavement or a bridge deck can be effectively resisted.

The invention relates to the field of anti-cutting gloves, in particular to an anti-cutting glove and a preparation method thereof, which are used for solving the problems of insufficient protection performance and poor comfort of the existing anti-cutting glove. The anti-cutting glove comprises a skin-attaching comfortable layer, a cutting-resistant layer and a wear-resistant gum dipping layer, the skin-attaching comfortable layer enables the glove to have excellent comfort and not prone to causing hand pressure, the cutting-resistant layer can effectively improve the cutting-resistant performance of the glove, the cutting-resistant capability of the glove is greatly enhanced, sharp instruments are prevented from easily penetrating through the glove, the hand safety is effectively protected, the wear-resistant gum dipping layer can effectively improve the sealing performance and wear resistance of the glove, and the service life of the glove is prolonged. The durability and the stability of the glove are improved; the anti-cutting gloves prepared by the preparation method not only can effectively protect the safety of hands, but also can keep excellent fitting degree and flexibility even when high-strength operation is carried out, so that an operator can smoothly complete tasks in a complex environment, and the working efficiency and the safety are remarkably improved.

The invention discloses a preparation method of anti-aging cellulose insulation paper, and belongs to the technical field of oil paper insulation for electrical equipment. The problems that in the prior art, the polymerization degree of cellulose insulation paper in an oil-paper insulation system is greatly reduced, so that aging is caused, the insulation performance is reduced, and the service life is shortened are solved. The preparation method comprises the following steps: firstly, pre-treating natural color softwood pulp, grinding the softwood pulp to different degrees, and mixing the softwood pulp; secondly, purifying the mixed paper pulp, screening out fine fibers, and replacing the screened-out fine fibers with aramid nanofibers to prepare mixed paper pulp containing the aramid nanofibers; adding the mixed paper pulp containing the aramid nanofibers into a sheet making machine, performing dehydration forming and drying to obtain raw paper, and performing calendaring to obtain the cellulose insulation paper. The aging resistance and the insulating property of the cellulose insulating paper are remarkably improved, and the performance requirements of the insulating paper for the ultra-high voltage transformer can be met.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a derivative resin material and a preparation method of the hydrated borate micromolecule. The preparation method comprises the following steps: S1, synthesizing boron-nitrogen coordination micromolecules: dissolving and reacting boric acid, a derivative thereof and a polyfunctional group amine compound at room temperature through a solution reaction to obtain the boron-nitrogen coordination micromolecules; the borate micromolecule NCBW-X with intramolecular boron and nitrogen coordination is formed; s2, the NCBW-X micromolecule can be used for curing epoxy resin and synthesizing materials such as phenolic resin through end-NH2 and end-OH on two sides, the NCBW-X improves the mechanical property of each system through a rigid eight-membered ring, boron-nitrogen coordination of the NCBW-X can generate hydration, the environmental endurance is improved on the premise of retaining the original dynamic nature of boric acid ester of the NCBW-X, and the service life of the NCBW-X micromolecule is prolonged. Meanwhile, due to the dynamic reversibility of the NCBW-X, the NCBW-X is used for curing epoxy resin, and materials such as phenolic resin and the like are improved to a certain extent in the aspects of self-repairing and recycling.

The invention belongs to the technical field of armor protection, and particularly relates to an anti-penetration bionic spiral laminated backboard packaging ceramic composite structure. According to the composite structure, the metal frame strongly restrains ceramic, so that the erosion efficiency of a ceramic material to a projectile is improved, meanwhile, the damage range under single impact is reduced through packaging, and therefore the multiple-impact-resistant capacity of the protective structure is improved. And the spiral laminated backboard on the lower surface of the ceramic is mainly used for providing back support for the ceramic material, so that the crushing of the ceramic material is delayed, and the penetration resistance of the ceramic is improved. The high-molecular polymer material back plate of the composite protection structure absorbs energy of shots and broken ceramic fragments through large deformation by means of the high tensile strength of the high-molecular polymer material back plate, and therefore the protection structure is prevented from being subjected to aftereffect damage after penetration of the shots. In addition, the overall thickness and the surface density of the composite protection structure are low.

The present invention belongs to the technical field of polyethylene preparation, and specifically relates to a cross-linked polyethylene insulated cable and a preparation method thereof. The cross-linked polyethylene insulated cable is composed of material A and material B, and the weight ratio of material A to material B is 95:5; material A is composed of the following raw materials: modified linear low-density polyethylene, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, di-tert-butylperoxyisopropylbenzene, vinyl tri(2-methoxyethoxy)silane, 1,2-polybutadiene; material B is composed of the following raw materials: linear low-density polyethylene, dibutyltin dilaurate, and antioxidant. In the cross-linked polyethylene insulated cable of the present invention, material A interacts with material B, so that the finally prepared cross-linked polyethylene insulated cable has excellent mechanical properties, chemical stability, and heat aging resistance.

The present invention relates to the technical field of concrete, and discloses a crack-resistant and waterproof concrete containing modified polyacrylonitrile fiber and a preparation method. The epoxy soybean oil grafted with high molecular weight polyacrylonitrile fiber contains a hydrophobic alkyl long chain and has better compatibility with asphalt. The asphalt containing the modified polyacrylonitrile fiber forms a hydrophobic network in the concrete, thereby improving the waterproof performance of the concrete. The high molecular weight polyacrylonitrile fiber has the advantages of high modulus and high strength, forms a fiber-reinforced phase in the asphalt, and improves the mechanical properties of the asphalt concrete; the asphalt containing the polyacrylonitrile fiber has a high adhesion to the minerals in the concrete, which can improve the surface adhesion performance inside the concrete, is conducive to enhancing the compactness, crack resistance, strength and modulus of the concrete, and expands the practical application of asphalt concrete in roads, steel box girder bridge decks, etc.

The invention discloses a wear-resistant thermoplastic elastomer material as well as a preparation method and application thereof, and relates to the technical field of cable sheaths. The wear-resistant thermoplastic elastomer material is prepared from the following components in parts by weight: 80-90 parts of thermoplastic polyurethane; 5-8 parts of polyethylene glycol; 8 to 15 parts of clay; 1-3 parts of a silane coupling agent; and 12-18 parts of an additive. The preparation method comprises the following steps: S1, preparing the additive; s2, mixing the materials; and S3, extruding and granulating. The cable sheath is applied to the field of cable sheaths. The polyethylene glycol improves the flexibility, plasticity, tensile strength, tear strength, wear resistance and the like of the material; the clay can effectively improve the strength, modulus and toughness of the material, so that internal gaps of the material become small, the barrier property is improved, and the wear resistance is improved through the unique layered structure of the clay; the polyethylene glycol and the clay are compounded, and the surface of the clay is rich in pores, so that hydroxyl groups at the ends of the polyethylene glycol penetrate into the pores, excellent interface bonding is provided, and the overall wear resistance of the material is improved.

The invention discloses a wear-resistant polyurethane material and a wear-resistant polyurethane rubber roller, and relates to the technical field of high polymer materials. When the wear-resistant polyurethane material is prepared, firstly, 4, 4 '-(10, 20-di-4-pyridyl-21H, 23H-porphin-5, 15-diyl) dibenzoic acid is reduced through a reducing agent, then is oxidized through an oxidizing agent, and finally reacts with hydroxylamine hydrochloride and triethylamine to obtain functionalized porphyrin; secondly, enabling the aramid short fibers subjected to acid etching to react with 3-chloropropyltriethoxysilane to obtain modified aramid short fibers; finally, 4, 4-diphenylmethane diisocyanate and polytetrahydrofuran ether glycol are subjected to a reaction, functionalized porphyrin and 1, 4-butanediol serve as chain extenders, then the modified aramid short fibers are added, and the wear-resistant polyurethane material is obtained through vulcanization. The wear-resistant polyurethane material prepared by the invention can be used for manufacturing a polyurethane rubber roller, and has high strength, good antibacterial property and self-repairing property.

The invention relates to a preparation technology of a polyurethane nanoscale microporous membrane for protective clothing, and belongs to the technical field of clothing fabric preparation, and the preparation technology specifically comprises the following steps: extracting silk fibroin and carrying out hydrophobic modification to obtain modified silk fibroin; then, the modified cellulose and polyurethane are mixed and dissolved in a solvent, a pore-forming agent and breathable particles obtained by mixing the modified cellulose and aerogel powder are added, and a mother solution is prepared; and finally, preparing a membrane by using the mother liquor, thereby obtaining the polyurethane nano-scale microporous membrane for the protective clothing. According to the process, modified silk fibroin and a polyurethane material are mixed, and breathable particles obtained by mixing modified cellulose and aerogel powder are added, so that the mechanical property of the membrane is remarkably improved, and the breathability is optimized. Meanwhile, through acetylation treatment on silk fibroin and modification on carboxymethyl cellulose by using dopamine hydrochloride, the overall performance of the material and the stability in the preparation process are further improved.

A flute formed by a carbon fiber composite material belongs to tubular musical instruments and is provided with a cylindrical tube body, the tube body is provided with holes, the cylindrical tube body is composed of a fiber cloth inner layer, a fiber-reinforced main body layer, a fiber cloth outer layer and a surface paint layer from inside to outside in sequence, the fiber cloth inner layer and the fiber cloth outer layer are made of 3K and 330g / m < 2 > twill-woven carbon fiber prepreg cloth, and the surface paint layer is made of a surface paint layer. The fiber-reinforced main body layer is a prepreg formed by mixing fibers and resin according to a set proportion, the fibers are carbon fibers, the resin is epoxy resin, the weight ratio of the carbon fibers to the epoxy resin is 50-70: 50-30, and the length-diameter ratio of the cylindrical tube body is (30-45): 1. The raw materials are easy to obtain, the production efficiency is improved, the finished product has higher stability and durability, and constancy of the shape and the tone quality in long-term use is ensured.

The invention discloses a modified resin composition for a high-pressure-resistant and high-wear-resistant PVC (polyvinyl chloride) hose, and belongs to the technical field of PVC pipes. The sisal fibers are subjected to alkali treatment, impurities are removed and active sites are increased through insertion modification and alkali treatment of the magnesium aluminate spinel fibers, the magnesium aluminate spinel fibers improve the performance of the pipe due to the high length-diameter ratio and other characteristics of the magnesium aluminate spinel fibers, a stable enhanced network structure is formed in a PVC matrix, the surface hardness and wear resistance are improved, the pressure is shared, and the pressure resistance is improved. A bicyclo [2.2. 2] octane structure contained in the long-chain graft modifier disclosed by the invention has rigidity and steric hindrance effect, can uniformly disperse pressure to avoid breakage or excessive deformation of a molecular chain, and is coupled with an amino silane coupling agent to form a three-dimensional structure to improve pressure resistance and wear resistance. After sulfonic groups and a long-chain grafting modifier are introduced to the surfaces of the interspersed modified sisal fibers, the hydrophobic and oleophylic properties of the sisal fibers are improved, the compatibility with PVC is enhanced, agglomeration is avoided, friction is effectively resisted, and the processing fluidity of the material is improved.

The invention provides a flame-retardant PP material with high strength and high modulus and a preparation method thereof. The flame-retardant PP material comprises the following raw materials in percentage by weight: 30-60% of polypropylene resin; 20 to 30% of a flame retardant; 20 to 30% of short glass fiber; 5-10% of a filling material; 5-10% of a compatilizer; and 2-3 wt% of other auxiliary agents. By compounding the piperazine halogen-free flame retardant, the glass fiber and the inorganic mineral powder, the tensile strength of the obtained polypropylene composite material reaches 69-75 MPa, the bending modulus reaches 5000-5400 MPa, and the tensile strength and the bending modulus are higher than general requirements of new energy battery materials; the flame retardant grade can reach 1.5 V0 of UL94, and the flame retardant grade requirements of most new energy batteries are met.

The invention relates to an integrally-formed hollow-structure Pick racket and a preparation method thereof, and belongs to the technical field of Pick rackets. The hollow cavity shell is filled with the foam core layer, an opening is formed in the hollow cavity shell, and the foam core layer is obtained by conducting heat treatment foaming on a foaming raw material; the method further comprises the following steps that an integrally-formed hollow cavity shell with an opening is obtained through a blow molding technology; the hollow cavity shell is filled with foaming raw materials; the filled hollow cavity shell is subjected to heat treatment, so that the foaming raw materials are foamed, expanded and fused in the shell, and a foam core layer tightly combined with the shell is formed; according to the Pick racket, an adhesive interface existing in a traditional spliced racket is structurally and thoroughly eliminated, the risk of adhesive failure and layering after long-term use or damp is fundamentally avoided, the structural integrity of the racket is greatly improved, and the durable life of the racket is greatly prolonged.

The invention provides a forming method and a forming device for a high-temperature-resistant hollow leading edge structure. According to the forming method, a V-shaped structure prefabricated body, an H-shaped structure prefabricated body, a flat plate structure prefabricated body, a corresponding V-shaped structure forming mold, a corresponding H-shaped structure forming mold and a corresponding flat plate structure forming mold are assembled to form a plurality of combined molds; the method comprises the following steps: firstly, preparing a plurality of combined molds, then performing densification treatment on the plurality of combined molds by adopting a precursor impregnation cracking process, then removing the molds, processing, preparing a coating on the surface of a component to obtain a V-shaped structure, an H-shaped structure and a flat plate structure, and finally assembling the V-shaped structure, the H-shaped structure and the flat plate structure to form the hollow front edge structural component. According to the method, preparation of the hollow leading edge structural member made of the carbon fiber reinforced ceramic matrix composite can be achieved, mold removal is convenient, and the mold can be repeatedly used.

The invention discloses an iron-based alloy composite wear-resistant material for preparing a roller sleeve flux-cored wire, and relates to the technical field of surfacing materials, the iron-based alloy composite wear-resistant material comprises the following raw materials by mass percentage: 52-58% of high carbon ferrochrome, 1-3% of chromium nitride, 1-2% of graphite, 8-11% of aluminum powder, 0.8-1.5% of nano yttrium oxide, 1-2% of modified carbon fiber, and the balance reduced iron powder; the modified carbon fibers are cerium oxide / reduced graphene oxide composite material modified carbon fibers. The nano yttrium oxide and the modified carbon fibers are added into the iron-based alloy composite wear-resistant material for preparing the roller sleeve flux-cored wire material, so that the hardness, toughness and wear resistance of the surfacing alloy material for the roller sleeve are effectively enhanced, and the wear loss of the surfacing alloy for the roller sleeve is remarkably reduced.

The invention relates to the technical field of synthetic fiber paper manufacturing, in particular to aramid-based heating paper and a preparation method thereof.The preparation method comprises the steps that para-aramid chopped fibers and potassium hydroxide are added into dimethyl sulfoxide, then water is added, stirring and dispersing are conducted, and nanofiber dispersion liquid is obtained; adding carbon fibers and aramid chopped fibers into the nanofiber dispersion liquid for defibering, and uniformly mixing to obtain chopped fiber dispersion liquid; the preparation method comprises the following steps: adding a meta-aramid polymer liquid, a nanofiber dispersion liquid and a precipitation agent into precipitation equipment, carrying out high-speed shearing to obtain a fibrid, carrying out cooling molding in a water washing pool, and carrying out multi-stage water washing to obtain a meta-aramid fibrid; and uniformly mixing the chopped fiber dispersion liquid and meta-aramid fibrid, and then carrying out wet-process papermaking, squeezing drying and hot-pressing treatment to obtain the aramid-based heating paper. According to the preparation method, the carbon fibers and the aramid chopped fibers can be well dispersed, and the prepared aramid-based heating paper has higher uniformity and better mechanical properties and heating performance.

The invention relates to injectable cross-linked collagen gel and a preparation method thereof. Two crosslinking strategies of self-crosslinking and crosslinking agent crosslinking are fused together for the first time, and two types of amido bonds, namely amido bonds of a collagen-collagen structure (A) and amido bonds of a collagen-fatty amine-collagen structure (B), are respectively constructed through two crosslinking paths, namely catalysis of collagen polypeptide self-crosslinking and catalysis of fatty amine crosslinking, so that a hard / soft dual crosslinking network is obtained. The relative proportion of the structure A and the structure B in the final product is adjusted through a proper cross-linking process, so that the strength and the stability of the final product are adjusted and controlled, and the use requirements of different injection parts can be met.

The invention provides a production process of a high-wear-resistance and impact-resistance aramid fiber material, and relates to the technical field of material preparation, and the production process comprises the following steps: S1, raw material preparation: selecting a para-aramid fiber prepolymer, a hydroxylated boron nitride nanosheet, N-methyl pyrrolidone, a wear-resistance enhancer and an impact-resistance modifier according to a preset proportion, S2, mixing, S3, polymerization reaction, S5, extrusion molding, S6, extrusion molding, and S7, molding. Transferring the mixed system into a reaction kettle, introducing nitrogen for 35-55 minutes, and replacing air in the reaction kettle to form an aramid polymer; s4, molding processing: cooling the nylon polymer to room temperature, then putting the nylon polymer into spinning solution storage equipment, and winding the stretched fibers; s5, auxiliary treatment, wherein the wound fibers are washed with water and dried; according to the invention, the aramid polymer has a good crystal structure and high molecular weight, the wear resistance of the material is improved, the interface bonding force between the fiber and the matrix can be improved, and the impact resistance of the material is further improved.

The utility model relates to the field of textile fabric, especially a kind of high-strength wear-resistant fabric, including wear-resistant surface layer and antibacterial substrate layer, wear-resistant surface layer and antibacterial substrate layer between being equipped with hot melt gauze, antibacterial substrate layer is made of fiber with antibacterial function, hot melt gauze top and bottom respectively with wear-resistant surface layer and antibacterial substrate layer fixed connection, hot melt gauze is woven from hot melt fiber;Wear-resistant surface layer is woven from first fiber bundle and second fiber bundle, and the first fiber bundle includes main wear-resistant fiber as core line, and auxiliary wear-resistant fiber around core line, the weaving density of first fiber bundle in wear-resistant surface layer is 60-90 per square centimeter Root;Second fiber bundle includes main tensile fiber as core line, and auxiliary tensile fiber around core line, the weaving density of second fiber bundle in wear-resistant surface layer is 50-70 per square centimeter Root. Its solved the technical problem that existing fabric cannot consider wear resistance and tensile property.

This application relates to the field of polymer materials technology, providing a PET elastomer, composite material, dynamic covalent network polymer, and its preparation method and application. The elastomer is prepared by in-situ self-assembly of crown ether-primary amide dual-functionalized PET through melt blending. Its molecular network integrates a quasi-rotaxane supramolecular crosslinking network. This structure is formed by the host-guest interaction between the crown ether and the primary amide, and can act as a sliding crosslinking point to dissipate energy through the sliding of cyclic components. This application employs a two-step end-capping-in-situ self-assembly process to overcome the technical obstacles of low PET chain-end activity and poor compatibility between polyrotaxane and PET, achieving molecular-level dispersion of quasi-rotaxane in the PET matrix. This fully utilizes the molecular pulley effect to achieve breakthrough toughening of the elastomer. Simultaneously, it combines rigid nanofillers modified with aminosilane coupling agents to form a soft-hard synergistic network, enabling the PET composite material to maintain high toughness while simultaneously improving strength, modulus, and thermal properties.

The present application relates to the technical field of tire overall preparation, and proposes a variable stiffness tire and a tire overall preparation device, which can adapt to various driving conditions and realize the collaborative optimization of comfort and control performance, and the structure can effectively disperse flexural stress, and is not prone to heat accumulation, bulging and cracking, thereby significantly improving high-speed durability and load capacity, and the matching tire overall preparation device can adapt to the molding process of the tire body, effectively improve tire production efficiency and manufacturing precision, and comprises a tire body and a triangular rubber ring, wherein the tire body comprises a tread, a sidewall and an inner tire ring, the sidewall is divided into a shoulder section, a sidewall middle section and a bead section in the radial direction, the stiffness of the bead section, the shoulder section and the sidewall middle section decreases in turn, the sidewall middle section is a main flexible deformation area, the shoulder section provides lateral restraint, the bead section provides high stiffness support, the tread is fixedly connected with the shoulder section, and the inner tire ring is fixedly connected with the triangular rubber ring.