280results about How to "High tear strength" patented technology

The invention discloses a high-performance ozone-resistant air spring and a preparation method thereof. An inner-layer rubber material and an outer-layer rubber material of the air spring are mainly prepared from the following components: chloroprene rubber, natural rubber, butadiene rubber, an anti-aging agent AW-66, an anti-aging agent 4010NA, an anti-aging agent 4020, microcrystalline wax, N660 carbon black, naphthenic oil, zinc oxide, CZ and insoluble sulfur. The preparation method comprises the steps of first-stage mixing, rubber discharging, standing, second-stage mixing, rubber discharging, standing, rubber sheet calendering, blastocyst forming, wrapping the blastocyst on the surface of a capsule, and performing high-pressure nitrogen vulcanization to form the air spring. The chloroprene rubber, the natural rubber and the butadiene rubber are blended and modified, so that the rubber has the following characteristics that the ozone resistance and the weather aging resistance are remarkably improved; the properties such as tensile strength, stress at definite elongation and tear resistance are improved; the production process properties such as extrusion and calendaring properties are improved, the deflection resistance of the rubber material is improved, and the service life of the product is prolonged.

The invention discloses a composite rubber material with wear resistance and high tear strength and a preparation method of the composite rubber material, and belongs to the technical field of rubber material processing. The technical problem that the enhancement effect of the filler on the wear resistance, tear resistance and mechanical strength of a rubber matrix needs to be further improved exists in the prior art. The composite material comprises the following components in parts by weight: 100-110 parts of internal mixed rubber, 1-2 parts of a vulcanization accelerator and 2-3 parts of a vulcanizing agent, modified polybutadiene is reinforced by aramid pulp, modified carbon black and modified graphene to prepare composite polybutadiene, and then styrene butadiene rubber is reinforced and modified by the prepared composite polybutadiene and silicone rubber to prepare the composite material. By improving the degree of crosslinking between material molecules and optimizing material composition, the wear resistance and tear resistance of the composite rubber material are effectively improved, and the mechanical property of the composite rubber material is also improved.

The invention relates to the technical field of silicone rubber, and discloses a preparation method of a modified silicone rubber elastomer, the modified silicone rubber elastomer comprises 100 parts by weight of methyl vinyl silicone rubber, 5-25 parts by weight of organosilicon grafted cellulose microcrystalline, 12-20 parts by weight of white carbon black, 1.7-2.4 parts by weight of a vulcanizing agent, 2.6-4.2 parts by weight of a cross-linking agent, and 1.5-2 parts by weight of an auxiliary agent, 1.2 to 1.6 parts by weight of an anti-aging agent; the organic silicon grafted cellulose microcrystal contains a siloxane structure and has good compatibility with the methyl vinyl silicone rubber, and in the high-temperature vulcanization process, alkenyl of the organic silicon grafted cellulose microcrystal can be subjected to a cross-linking reaction with the methyl vinyl silicone rubber and triallyl isocyanurate, so that the organic silicon grafted cellulose microcrystal can be used for curing the methyl vinyl silicone rubber and the triallyl isocyanurate. The interface bonding strength between the cellulose microcrystal and the methyl vinyl silicone rubber is enhanced, so that the silicone rubber elastomer shows higher tensile property, hardness and tearing strength.

The invention relates to the technical field of EVA (ethylene vinyl acetate), and discloses a drop-resistant antibacterial foaming insole as well as a preparation method and application thereof, the foaming insole is prepared from the following components in parts by weight: 100 parts of ethylene-vinyl acetate copolymer, 1-8 parts of hydroxyl-containing polyquaternium, 0.6-5 parts of hydroxyethyl acrylate grafted EVA, 0.8-7 parts of isocyanate-terminated polyurethane, 4-5.5 parts of foaming agent and 0.8-1.5 parts of assistant, 1.2 to 1.7 parts of a cross-linking agent; in the high-temperature mixing and mold pressing process, hydroxyl groups of the hydroxyl-containing polyquaternium and the hydroxyethyl acrylate grafted EVA react with isocyanate-terminated groups of the polyurethane, so that the hydroxyl-containing polyquaternium, the hydroxyethyl acrylate grafted EVA and the isocyanate-terminated groups of the polyurethane form a chemical cross-linked hybrid system, and the insole material shows higher tear strength, tensile strength and elongation at break; meanwhile, good hydrophilicity and antibacterial and mildew-proof performance are achieved.

The invention relates to the technical field of silica gel sheets, in particular to a high-strength wear-resistant heat-conducting composition and a preparation method and application of a silica gel sheet. The invention discloses a high-strength wear-resistant heat-conducting composition which comprises the following components in parts by weight: 1-5 parts of methyl vinyl silicone rubber; 15 to 20 parts of vinyl silicone oil; 2-10 parts of white carbon black; 0.5-1 part of a first coupling agent; 50-70 parts of a heat conducting filler; 0.1 to 0.2 part of a chain extender; 5-10 parts of a cross-linking agent; 0.01 to 0.02 part of a catalyst; and 0.01 to 0.05 part of a polymerization inhibitor. According to the silica gel sheet provided by the invention, the binding force between the filler and the silica gel matrix is enhanced through the high heat conduction characteristic of the heat conduction filler powder and the treatment of the coupling agent, so that the overall heat conduction performance of the material is improved. Meanwhile, by controlling the particle size and the shape of the filler and adopting methods such as ball milling treatment, the mechanical property of the material is ensured, and the stable performance can be kept in long-time use.

The invention discloses a bio-based composition and application of the bio-based composition as a paper-plastic pulp additive. The bio-based composition comprises a component A, a component B and a component C, wherein the component A is one or two of a biomass material or a cationized biomass material; the biomass material and the cationized biomass material have a dendritic, fibrous, sheet-shaped, pinniform, flocculent or porous spongy structure; the component B is selected from one, two or more of PHA (polyhydroxyalkanoate), AKD (alkyl ketene dimer), PGA (polyglutamic acid), PLA (polylactic acid), PBAT (polybutylene adipate-co-terephthalate), cellulose ester and cellulose ether; a component C: a retention aid; the bio-based composition does not contain a reinforcing agent, a sizing agent and / or a mineral filler. The bio-based composition provided by the invention is used for paper pulp molding production, and can effectively improve the physical strength indexes of paper plastic, such as ring crush compression resistance, tear strength, bursting strength and / or tensile strength. Mold sticking and mold hole blocking can be avoided, and the production efficiency is improved.

The invention discloses an in-situ inorganic hybridization reinforced polyurethane resin and a preparation method thereof. An inorganic in-situ bonding structure of the in-situ inorganic hybridization reinforced polyurethane resin can effectively control the strength and hardness of the polyurethane resin; and the organic auxiliary agent can effectively reduce the curing speed of the high-activity component, so that the system resin can be simultaneously applied to use scenes with different curing speeds and different hardness requirements. The in-situ inorganic hybridization reinforced polyurethane resin comprises a component A and a component B. The component A is prepared from the following components in parts by mass: 100 parts of isocyanate-terminated polyurethane oligomer, 4.5 to 102 parts of monomer polyisocyanate b, 2.9 to 4.4 parts of reaction speed regulator and 0 to 1.2 parts of catalyst a; the component B is prepared from the following components in parts by mass: 14.5 to 89.6 parts of silanol, 0 to 2 parts of glycerol and 0 to 1.2 parts of catalyst b; wherein in use, the component A and the component B are mixed according to the mass ratio of (1.66-7.1): 1 to obtain the in-situ inorganic hybridization reinforced polyurethane resin.

The invention provides a cross-linking and curing environment-friendly polyurethane waterproof coating and a preparation method thereof, and the cross-linking and curing environment-friendly polyurethane waterproof coating comprises the following raw materials by weight: 15-30 parts of a polyhydroxy compound; 6 to 15 parts of pentaerythritol polyether; 1-5 parts of an anionic surfactant; 1 to 5 parts of nano silicon dioxide aerogel; 1-8 parts of wollastonite powder; 25 to 45 parts of fly ash floating beads; 10 to 25 parts of diisocyanate; 0.5 to 3 parts of chlorinated paraffin; and 0.5 to 3 parts of N, N-dimethyl-2-hydroxyethylamine. The cross-linking curing environment-friendly polyurethane waterproof coating provided by the invention solves the environment-friendly problem of the traditional polyurethane waterproof coating, realizes solvent-free curing, meets the environment-friendly requirement, improves the comprehensive properties such as elasticity and durability of a coating film, and provides a safer and more effective solution for waterproof construction.

The invention discloses a preparation process of a modified non-woven fabric produced by utilizing recycled PP meal box broken pieces, and belongs to the technical field of non-woven fabrics, the process comprises the following steps: firstly, sorting, cleaning and screening the recycled PP meal box broken pieces, and then mixing the recycled PP meal box broken pieces with a modification enhancer for later use; conveying the prepared raw materials to a screw extruder by adopting a spiral feeder, and carrying out melt extrusion; extruding the melt through a spinneret plate, carrying out spinning molding, cooling and solidifying the fiber through a cooling device, and laying to form a continuous fiber net; finally, the fiber net is reinforced in a drafting and heat bonding mode, the non-woven fabric with the needed physical performance is formed after net laying, and heat treatment and calendaring treatment are conducted. According to the preparation process, the waste PP meal box is effectively utilized, the use of original PP is reduced, the production cost is reduced, meanwhile, the environmental pollution is reduced, and the preparation process has remarkable economic and social benefits.

The present invention relates to the technical field of chemical coating materials. The present invention provides an explosion-proof and bullet-proof coating material and a preparation method thereof. The coating material comprises a substrate layer and a composite layer, wherein the composite layer is coated on both sides of the substrate layer, and the composite layer comprises a plurality of elastomer layers, a plurality of modified layers and a plurality of filler layers, and the composite layer is arranged alternately in the order of "modified layer-filler layer-elastomer layer-filler layer" in sequence; the elastomer layer comprises the following materials: isocyanate, polytetramethylene ether polyol and 3,5-diethyltoluenediamine; the modified layer comprises the following materials: epoxy resin and chain extender; compared with the existing polyurea composite coating, the multilayer arrangement of "modified layer-filler layer-elastomer layer-filler layer" is adopted, and the effects and polarities between the functional layers are reasonably utilized to improve the adhesion between the coating materials.

The invention provides a bacteriostatic high-barrier nano-cellulose-based composite film for fruit and vegetable preservation and a preparation method thereof, and the preparation method comprises the following steps: carrying out sulfonation modification treatment on nano-cellulose powder by using 1, 3-propane sultone to obtain sulfonated nano-cellulose; then, octadecyl trimethyl ammonium chloride is adopted for conducting quaternization modification treatment on the sulfonated nano-crystalline cellulose, and quaternary ammonium sulfonated nano-crystalline cellulose is obtained; the preparation method comprises the following steps: dispersing silver-loaded chitosan in deionized water to obtain a silver-loaded chitosan solution, adding montmorillonite into the silver-loaded chitosan solution, mixing, stirring and heating, and then carrying out suction filtration, washing and drying to obtain intercalated montmorillonite; the preparation method comprises the following steps: uniformly mixing polylactic acid, quaternary ammonium sulfonated nano-cellulose, intercalated montmorillonite, a plasticizer, a lubricant and an antioxidant to obtain a mixed material, and sequentially carrying out melt extrusion, cooling, pelletizing and film blowing on the mixed material to obtain the antibacterial high-barrier nano-cellulose-based composite film.

The invention discloses a tear-resistant wave-absorbing edge sealing adhesive tape and a preparation method thereof, and belongs to the technical field of wave-absorbing materials. The tear-resistant wave-absorbing edge-sealing adhesive tape is characterized by comprising the following components: a fabric and wave-absorbing silicone oil, the mass ratio of the fabric to the wave-absorbing silicone oil is 1: (10-50), and the wave-absorbing silicone oil comprises the following components: an absorbent, vinyl silicone oil, hydrogen-containing silicone oil and fumed silica. In order to increase the compatibility of the absorbent, the absorbent is subjected to surface treatment through a silane coupling agent. The tear-resistant wave-absorbing edge-sealing adhesive tape provided by the invention realizes excellent physical properties and functional characteristics, and has a wide application prospect.

The present invention belongs to the field of C08G technology, and more specifically relates to a thermoplastic polyurethane elastomer for antibacterial air cushions, and a preparation method and application thereof. A thermoplastic polyurethane elastomer for antibacterial air cushions, the raw materials for preparing the thermoplastic polyurethane elastomer include, by weight percentage: 50-60% polyester polyol, 30-40% isocyanate, 5-10% chain extender, and the remainder of the auxiliary agent is supplemented to 100%. The antibacterial rate of the thermoplastic polyurethane elastomer prepared by the present invention can be as high as 99% or more. When it is used in the shoe material air cushion, it can avoid the infection of bacteria and the like caused by the foot movement, sweating, etc. during use; the thermoplastic polyurethane elastomer prepared by the present invention has good processing performance, and has good tear strength and tensile properties. When it is used in the field of air cushions, it can avoid the damage of the finished product caused by external forces such as tearing and stretching, and improve its service life and use value in the field of shoe material air cushions.

The invention provides a thermoplastic polyurethane elastomer-vinyl silicone rubber composite material as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The thermoplastic polyurethane elastomer-vinyl silicone rubber composite material provided by the invention is prepared from the following raw materials: a thermoplastic polyurethane elastomer, vinyl silicone rubber, an inorganic filler, a structure control agent, a compatilizer and a vulcanizing agent, and the structure control agent is hydroxyl silicone oil and methyltriethoxysilane; the mass ratio of the thermoplastic polyurethane elastomer to the vinyl silicone rubber to the inorganic filler to the structure control agent to the compatilizer is (100-400): (20-80): (5-50): (1-8): (1-10), and the mass of the vulcanizing agent is 0.2-1.8% of the mass of the thermoplastic polyurethane elastomer. The thermoplastic polyurethane elastomer-vinyl silicone rubber composite material provided by the invention has excellent mechanical properties.

The invention discloses a flame-retardant antistatic rubber material for a conveying belt and a preparation method of the flame-retardant antistatic rubber material, and relates to the technical field of rubber materials. The rubber material is prepared from the following components: 40-80 parts of chloroprene rubber, 10-40 parts of butadiene rubber, 10-30 parts of high styrene rubber, 20-40 parts of a reinforcing agent, 15-30 parts of an antistatic agent, 10-30 parts of aluminum hydroxide, 10-20 parts of a modified flame retardant, 5-10 parts of polyethylene fibers, 5-10 parts of zinc stearate, 3-6 parts of a coupling agent, 4-8 parts of a vulcanizing agent, 1-3 parts of an accelerant and 1-3 parts of an anti-aging agent. Basic performance is provided through a compounding system of three kinds of rubber, the mechanical performance is improved by adopting an attapulgite-carbon black compounding reinforcing system, and the antistatic and flame-retardant functions are achieved in combination with the antistatic agent and the specially-made modified flame retardant.

The invention relates to organic silicon leather, in particular to wear-resistant organic silicon leather and a preparation method thereof.The wear-resistant organic silicon leather comprises a silicon rubber layer, the silicon rubber layer is formed by curing liquid glue, and the hardness range of the cured liquid glue is 60-70 A; the preparation method comprises the steps of preparation of raw materials of the wear-resistant layer, preparation of the bonding layer, formation of the wear-resistant layer, formation of the silicone rubber layer and preparation of the wear-resistant organic silicon leather, and the silicone rubber layer adopts liquid glue with the hardness of 60-80A, so that the tearing strength of the silicone rubber layer is improved, and the wear resistance of the organic silicon leather is improved.

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 nitrile rubber composition with high temperature resistance and compression set resistance and a preparation method thereof, and relates to the technical field of rubber compositions, and the nitrile rubber composition is prepared from the following components in parts by weight: nitrile rubber, zinc oxide, sodium stearate, an enhanced supplementary additive, nano cerium oxide, carbon black, methyl phenyl silicone oil, resin, an anti-aging agent, sulfur and an accelerant. The nitrile rubber composition prepared by the invention is rich in elasticity and rebound resilience; the sealing material has excellent mechanical strength including expansion strength, elongation, tear strength and the like, has the characteristics of good air tightness, high temperature resistance and excellent compression set resistance, and can be suitable for most sealing occasions.

The invention discloses a soft and cool denim fabric and a spinning method thereof. The spinning method comprises the following steps: pretreating lyocell fibers and Iris lacteal herb ice-cold chinlon as weft yarns; warp yarns are wound into a warp beam through a ball warp machine, a rope dyeing machine, a leasing machine and a sizing machine; and finally, weaving by a rapier loom to form gray fabric, and carrying out post-treatment process to obtain the jean fabric. The mat rush in the weft yarns is rich in natural components nitrogen and silicon with high heat conductivity coefficients, the effect of rapidly dissipating surface heat can be achieved, meanwhile, high-volatility and high-moisture-absorption alcohol and ester components contained in the mat rush can achieve a cool feeling through rapid moisture conduction, the unique structure of the mat rush can rapidly dissipate heat, sweat can be rapidly absorbed, and the mat rush can be used for cooling the fabric. In addition, the mat rush also has the characteristics of antibiosis, freshness and fragrance, so that the generation of peculiar smell is reduced; due to the unique weft yarn combination in the jean fabric, the inherent characteristics of the jean fabric are kept, and meanwhile the performance of the jean fabric is comprehensively improved.

The invention discloses a low-temperature cured bi-component epoxy resin conductive adhesive. A component A and a component B are mixed according to a ratio of 1: 1 and then cured at room temperature; the component A at least comprises the following components: novolac epoxy resin, epoxy resin, core-shell toughened epoxy resin, a diluent, a coupling agent, a thixotropic agent and a conductive filler; the component B at least comprises the following components in parts by mass: a curing agent and an accelerant; wherein the core-shell toughened epoxy resin is bisphenol A epoxy resin with uniform nanoscale core-shell particle dispersity; the invention also discloses a preparation method of the low-temperature cured bi-component epoxy resin conductive adhesive. The curing of the conductive adhesive at low temperature or room temperature is realized, the internal reaction degree of the matrix is high, the mechanical strength and conductivity of the conductive adhesive are met at the same time, and effective bonding is realized and relatively good performance is kept after electronic components are cured in application scenes with use temperature requirements.

The invention relates to the technical field of foamed silicone rubber and production and preparation processes, in particular to high-hardness foamed silicone rubber and a preparation method thereof.The high-hardness foamed silicone rubber is prepared from 1-20 parts of hydrogen-containing polysiloxane, 10-70 parts of hydroxyl-terminated polymethylvinylsiloxane, 1-30 parts of a mechanical reinforcing agent, 10-80 parts of a flame retardant and 0.05-0.3 part of a catalyst; the mechanical reinforcing agent is a mixture which simultaneously uses fumed silica, vinyl MQ silicon resin and surface-treated carbon nanotubes, so that the foamed silicone rubber has high hardness and does not increase the density, and meanwhile, by utilizing the shear thickening gel which is filled and adsorbed in the carbon nanotubes, when the foamed silicone rubber material is pressed, the foam silicone rubber material is not easy to deform. According to the present invention, the carbon nano-tube can rapidly harden, such that the originally soft carbon nano-tube can form the skeleton support on the foamed silicone rubber so as to improve the compressive strength and the permanent deformation property of the foamed silicone rubber, such that the foamed silicone rubber material with characteristics of good hardness, low density, excellent compressive strength and excellent resilience can be used for new energy battery support.

The invention relates to the technical field of synthesis of low-hardness thermoplastic polyurethane, in particular to a low-hardness quick-forming TPU (thermoplastic polyurethane) granule for injection molding and a preparation method of the low-hardness quick-forming TPU granule. The invention relates to a low-hardness quick-forming TPU (thermoplastic polyurethane) granule for injection molding, which is prepared from the following components in parts by weight: 8 to 12 parts of aliphatic diisocyanate, 14 to 20 parts of aromatic diisocyanate, 4 to 8 parts of chain extender, 0.05 to 0.5 part of solubilizing microcrystal region framework agent, 68 to 72 parts of polyhydric alcohol, 0.00005 to 0.001 part of catalyst and 0.5 to 1 part of antioxidant. The chain extender is formed by matching at least one of 2, 2-dimethylolpropionic acid, 2, 2-dimethylolbutyric acid and N, N-dihydroxyethyl glycine with at least one of diol, diamine and monohydramine with the molecular weight of 61-500g / mol. According to the invention, no plasticizer is added, the hardness can be controlled between 58-65A, and the tensile strength, wear resistance and aging resistance are relatively excellent.

The invention relates to the technical field of rubber waterstops, and discloses a rubber waterstop suitable for a low-temperature environment of a tunnel in a cold region and a preparation method of the rubber waterstop. The rubber waterstop suitable for the low-temperature environment of the tunnel in the cold region is prepared from the following raw materials in parts by mass: 100 to 150 parts of ethylene propylene diene monomer, 5 to 15 parts of homopolymerized epichlorohydrin rubber, 20 to 40 parts of acrylate rubber, 1 to 3 parts of liquid nitrile rubber, 0.01 to 0.1 part of phthalic anhydride, 5 to 10 parts of nano graphene oxide, 1 to 3 parts of tetraethoxysilane, 1 to 2 parts of amino silane and 40 to 60 parts of reinforcing agent. 1-3 parts of an anti-aging agent, 1-5 parts of a plasticizer, 1-2 parts of a vulcanizing agent and 1-2 parts of an accelerant. The obtained water stop belt is excellent in mechanical performance, tensile strength, tearing strength and compression set at the low temperature of-40 DEG C are excellent, cracking is avoided at the low temperature, and the water stop belt can better adapt to the extreme environment.

Provided is a separator for an aluminum electrolytic capacitor, which is formed of natural cellulose fibers and beaten regenerated cellulose fibers and has excellent tear strength, short circuit resistance and impedance characteristics. The separator for an aluminum electrolytic capacitor is sandwiched between the anode and cathode of the aluminum electrolytic capacitor, is formed of 50 to 90% by mass of natural cellulose fibers and 50 to 10% by mass of beaten regenerated cellulose fibers, and has a tear index of 20 to 100 mN·m 2 / g, and the short-circuit rate when 500V is applied in the separator dielectric breakdown test is 10% or less.

The present invention discloses a matte halogen-free elastic composite material and a preparation method and application thereof. The matte halogen-free elastic composite material is prepared from raw materials including: 10wt% to 50wt% of polyolefin elastomer; 10wt% to 50wt% of EPDM elastomer; 5wt% to 20wt% of styrene elastomer; 1wt% to 5wt% of SEBS‑g‑MAH compatibilizer; 5wt% to 30wt% of filler; and 1wt% to 5wt% of auxiliary agent. The matte halogen-free elastic composite material of the present invention has the properties of good tensile properties, good light and heat aging resistance, high tear strength, scratch resistance, etc., and meets the requirements of matte appearance. The material of the present invention has excellent comprehensive performance, simple preparation process, is worthy of promotion and application, and is suitable for use as an elastomer material for automotive soft accessories.

The utility model discloses a sheet metal part drilling fine adjustment mechanism relates to sheet metal part drilling field, the utility model discloses a first electric sliding table, and the output of first electric sliding table is equipped with the first sliding seat, and the top of first sliding seat is installed with second electric sliding table, and the output of second electric sliding table is equipped with the second sliding seat. The utility model discloses through being provided with the shielding cloth, first bolt, second bolt, first side plate and second side plate, the top of first electric sliding table and second electric sliding table can be shielded by the shielding cloth, prevent the direct drop of debris to the top of first electric sliding table and second electric sliding table, thereby prevent the hard debris (such as metal scrap) and cause the sliding seat to be stuck in the clearance between electric sliding table and sliding seat and affect the movement of sliding seat, to ensure that the sliding seat can move smoothly, prevent the sliding seat to push the debris movement simultaneously and make the debris and the top of electric sliding table rub and scratch the top surface of electric sliding table, thereby prolong the service life of electric sliding table.

The present invention discloses a high-toughness, flame-retardant non-woven fabric and a preparation method thereof, and belongs to the technical field of non-woven fabric preparation. The present invention is used to solve the technical problem that the preparation process of non-woven fabric materials in the prior art is complicated, and the toughness and flame-retardant properties of non-woven fabrics need to be further improved. A high-toughness, flame-retardant non-woven fabric is obtained by alternately stacking polyurethane spinning membranes and composite polyester spinning membranes to obtain a multilayer spinning membrane with upper and lower surface layers being polyurethane spinning membranes, and then steam hot rolling the multilayer spinning membranes. The present invention synthesizes a composite polyurethane having polyethylene glycol and polysiloxane segments, and then modifies it to prepare a polyurethane fiber membrane, and then stacks it layer by layer with a composite polyester spinning membrane composed of modified polysiloxane and polyethylene terephthalate to prepare a composite non-woven fabric, which not only effectively simplifies the preparation process of the non-woven fabric, but also improves the breaking strength, tensile properties and flame-retardant properties of the non-woven fabric material.

The invention relates to a production process of tire rubber modified by recycled vegetable oil, comprising the following steps: 1) preparing recycled vegetable oil; 2) preparing modified polyurethane elastomer; 3) preparing tire rubber modified by recycled vegetable oil. The invention overcomes the shortcomings of the prior art and has a reasonable design. After the waste edible oil is purified, it reaches the range of industrial indicators to obtain renewable bio-based oil that meets the requirements of tire use, and can consume a large amount of "gutter oil" discarded in the catering industry and other industries. At the same time, the obtained tire rubber modified by recycled vegetable oil has high tear strength and excellent tear resistance; high tensile strength and elongation at break, good mechanical properties; good wear resistance, low brittle temperature, and good low temperature resistance.

The invention belongs to the technical field of polyurethane elastomers, and discloses a method for preparing an ultraviolet-resistant thermoplastic polyurethane elastomer. Epichlorohydrin-modified graphene and benzophenone modifier are reacted to obtain benzophenone-modified graphene; and then reacted with polyol and diisocyanate to obtain an ultraviolet-resistant thermoplastic polyurethane elastomer. The compatibility and dispersibility between graphene and polyurethane elastomer are improved, the bonding strength between the two is enhanced, and the tensile strength and other mechanical properties of the polyurethane elastomer are improved. Benzophenone-modified graphene is chemically grafted into the polyurethane elastomer, so that the benzophenone anti-ultraviolet absorption group is uniformly dispersed in the elastomer matrix, and the ultraviolet resistance and yellowing resistance of the elastomer are significantly improved.

This invention relates to the field of nitrile butadiene rubber (NBR) technology, and discloses a biodegradable NBR, its preparation method, and its application in gloves. The biodegradable NBR of this invention comprises 60-80 parts by weight of NBR, 3-6 parts by weight of filler, 1.2-1.8 parts by weight of vulcanizing agent, 20-40 parts by weight of polylactic acid (PLA), and 5-12 parts by weight of cyanopolyester. The cyanopolyester of this invention improves the compatibility between PLA and NBR, resulting in a thermoplastic PLA-NBR composite material with higher tensile strength and tear strength, exhibiting excellent mechanical properties. The cyanopolyester's main chain contains a large number of biodegradable ester groups, and the addition of biodegradable PLA further enhances the biodegradability of the NBR material, making it more environmentally friendly and suitable for practical applications in biodegradable gloves.