551 results about "Tear resistance" patented technology

The invention relates to the technical field of polymer foam materials, in particular to a preparation method of gradient cross-linked pearl wool microcellular foamation.According to a gradient cross-linked network constructed through a two-stage cross-linking technology, collaborative optimization of the performance of a surface layer and the performance of a core part of the material is achieved, a compact three-dimensional net-shaped structure is formed in a high-cross-linking-degree area of the surface layer, and the core part of the material is expanded; the surface hardness, wear resistance and tear resistance of the material are remarkably enhanced, external impact and friction damage are effectively resisted, the low-crosslinking-degree area of the core part retains the moderate movement capacity of a polymer chain, the material is endowed with excellent energy absorption characteristic and flexibility, and the material has good mechanical properties when bearing complex stress. Stress dispersion can be achieved through surface layer-core part synergistic deformation, fracture failure caused by local stress concentration is avoided, meanwhile, a gradient cross-linked network provides a controllable melt strength gradient field for supercritical fluid foaming, and therefore accurate control over the size and distribution of foam holes is achieved in the single-time foaming process.

The invention discloses a preparation method of a rubber waterstop material with a low compression set rate, which comprises the following steps: firstly, carrying out blending reaction on hydroxyl silicone oil and boric acid to obtain liquid polyborosiloxane; the preparation method comprises the following steps: adding liquid polyborosiloxane and natural rubber into an internal mixer according to a ratio, and carrying out internal mixing to obtain a mixture; adding zinc oxide, an anti-aging agent, stearic acid and an anti-tearing agent into the obtained mixture, and continuously mixing; continuously adding kaolin talcum powder, calcium carbonate, calcium oxide, white carbon black, N550, N330 and KH550, and internally mixing again to obtain a preform; adding a vulcanization accelerator and a vulcanizing agent into the preform, and continuously mixing to obtain a rubber material to be vulcanized; and vulcanizing and forming the rubber material to be vulcanized to prepare the rubber water-stop belt material with the low compression set rate. According to the invention, the compression set rate of the rubber material can be reduced while the tensile strength, elongation, tear resistance and other properties of the rubber are not sacrificed, so that the product performance is enhanced.

The invention discloses a cross-linking type biodegradable POF heat shrink film and a preparation method thereof, and belongs to the technical field of heat shrink films, and the cross-linking type biodegradable POF heat shrink film is characterized by comprising three layers of films which are sequentially attached, each of the first-layer film and the third-layer film comprises the following raw materials in percentage by weight: 89.5-94% of PP, 2-6% of degradable master batch, 0.5-3% of an anti-blocking agent and 1-4% of a slipping agent; the second-layer film is prepared from the following raw materials in percentage by weight: 30 to 35 percent of LLDPE-A, 9 to 14.5 percent of toughening agent, 0.5 to 1 percent of degradable master batch, 40 to 45 percent of LLDPE-B and 10 to 15 percent of metallocene LLDPE; the melt index of the LLDPE-A is 2.5 g / 10min, the melt index of the LLDPE-B is 2.1 g / 10min, the melt index of the metallocene LLDPE is 1.0 g / 10min, and through the synergistic effect between the LLDPE with different melt indexes and the flexibilizer, the low-temperature tear resistance of the heat shrink film is effectively improved.

To provide a laminate excellent in tearing property while reducing environmental load.SOLUTION: A laminate comprises a substrate film, a primer layer, an adhesive layer, and a sealant film in this order, and includes a printed surface of an electrostatic ink composition adhered to the adhesive layer. The adhesive layer contains a solvent-free adhesive composition including a polyol component and a polyisocyanate component, its cured product, or a mixture thereof, and the adhesive strength of the adhesive layer is 1.0 N / 15 mm width or more. The laminate has a group of scratches, each consisting of multiple scratches that include through-holes.SELECTED DRAWING: Figure 1

The invention discloses a tear-resistant high-strength rubber cushion belt for a heavy truck and a preparation method of the tear-resistant high-strength rubber cushion belt, and relates to the technical field of rubber cushion belts. Hybrid short fiber modified natural rubber is used as a main raw material; phosphotungstic acid modifies the surface of a graphene nanosheet through a coordinate bond, cerium dioxide generated through hydrolysis is combined with heteropolyanions of phosphotungstic acid through a W-O-Ce bond, electrostatic adsorption is carried out on the surface layer of a protonated aramid short fiber, and a hybrid short fiber is prepared; mixing according to the ratio, extruding a rubber strip according to the weight and length requirements, vulcanizing, and uniformly adhering the cord fabric with the composite coating on the surface to the two sides of the R arc through a special-shaped die during extrusion. The proportioning components of the flap are particularly suitable for occasions requiring high rigidity and good shape retentivity, such as heavy trucks, and the flap has excellent tear resistance and high strength. The prepared cushion belt has the effects of tear resistance and high strength.

The invention relates to a braided structure optimization method of a glass fiber sleeve in the field of new material industry, which comprises the following steps: if improved structural design data does not reach a preset stress uniformity threshold, performing fine adjustment on fiber interaction parameters through an iterative optimization algorithm to obtain a new braided structure scheme, and determining the improvement effect of stress distribution; according to the new braided structure scheme, simulating mechanical performance under a high-strength requirement and a sudden external force impact scene, obtaining test data of tear resistance, and judging whether the test data meet a preset performance standard or not; according to the updated mechanical property simulation result, fatigue life prediction data of the material in a complex stress environment is obtained by combining a fatigue damage evaluation model with long-term service life, and whether the requirement for durability improvement is met or not is judged.

A dismantlable pallet including a substantially planar, upper load bearing member with a reinforcing internal frame; a substantially planar, lower supporting base with a reinforcing internal frame configured to improve the structural rigidity and load bearing capacity of the base. The pallet further includes a plurality of spaced apart support members sandwiched between the load bearing member and the base defining apertures between the load bearing member and the base, rendering the pallet releasably engageable with conventional and compatible load transporting apparatuses; and at least one releasable fastener to secure the load bearing member to the base with their respective reinforcing internal frames and the support members sandwiched between the member and the base wherein the load bearing member and the base are made of a rubber compound selected from the group including hardness, tensile strength, tear resistance, abrasion resistance, temperature resistance, impact resistance, slip resistance and moisture resistance.

The invention provides a high-elasticity tear-resistant silicone rubber material and a preparation method thereof.The high-elasticity tear-resistant silicone rubber material is characterized by being prepared from, by mass, 100 parts of vinyl polysiloxane, 5-15 parts of phenylboronic acid end group modified polydimethylsiloxane and 1-5 parts of 2, 3-dihydroxypropyl disulfide, the adhesive comprises the following components in parts by mass: 10-30 parts of fumed silica, 1-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 0.001-0.005 part of a catalyst. By introducing the combination of phenylboronic acid end group modified polydimethylsiloxane and 2, 3-dihydroxypropyl disulfide, a dual dynamic covalent bond network with a stress triggering characteristic is constructed in a silicone rubber system, and when the material is subjected to external force, a disulfide bond is used as a sacrificial unit to preferentially break to dissipate energy and generate micro-voids, so that the stress triggering performance of the material is improved. And then stress-triggered boric acid ester bond dynamic recombination further disperses stress and stabilizes a micro-cavity structure, so that graded dissipation of energy is realized, crack propagation is reduced, and the elasticity and tear resistance of the material are improved.

The invention discloses cold-resistant and tear-resistant coating resin and a preparation method thereof, and relates to the technical field of coatings. The invention discloses cold-resistant and tear-resistant coating resin. The invention relates to a water-based paint, which is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 25 parts of poly (hexanediol adipate), 5 to 10 parts of modified nano silicon dioxide, 8 to 15 parts of diphenylmethane diisocyanate, 3 to 8 parts of trimethylolpropane, 10 to 20 parts of methyl methacrylate, 8 to 15 parts of butyl acrylate, 0.5 to 2 parts of benzoyl peroxide and 0.2 to 0.8 part of dibutyltin dilaurate. The invention relates to an anti-aging coating which comprises the following components in parts by weight: 20-30 parts of a silane coupling agent, 1-3 parts of a silane coupling agent KH-550, 0.3-1 part of an anti-aging agent 264, 5-12 parts of dioctyl phthalate and 20-35 parts of a mixed organic solvent. The raw materials are scientifically proportioned, and the cold resistance and tear resistance of the coating are remarkably improved through the synergistic effect of the modified epoxy resin and the modified nano silicon dioxide; water is strictly controlled in the whole process, side reaction is avoided, and stable resin structure is guaranteed; the preparation steps are clear and definite, the repeatability is high, the solvent system adaptability is good, construction is convenient and fast, and the method is suitable for base material protection in various low-temperature scenes.

The invention provides a high-flexibility tear-resistant epoxy structural adhesive as well as a preparation method and application thereof. The epoxy structural adhesive is prepared by mixing a component A and a component B, on the basis of the total weight of the component A, the component A comprises the following components in percentage by weight: 34-70% of modified epoxy resin, 5-30% of bisphenol A type epoxy resin, 2-6% of benzyl alcohol, 8-15% of an epoxy reactive diluent, 0.2-1.5% of a defoaming agent, 1-5% of a thixotropic agent, 5-40% of filler and 1-4% of epoxy color paste; on the basis of the total weight of the component B, the component B comprises the following components in percentage by weight: 55-75% of polyether amine, 5-15% of bisphenol A epoxy resin, 5-10% of benzyl alcohol and 10-20% of dodecylphenol. The mixing mass ratio of the component A to the component B is (3.7-7): 1. The modified epoxy resin and the bisphenol A epoxy resin are compounded, and an optimized curing system is combined, so that the flexibility and the tear resistance of the structural adhesive are remarkably improved while the high strength of the epoxy resin is maintained, and the structural adhesive is suitable for structural bonding in the fields of buildings, automobiles, electronics and the like.

The invention relates to the technical field of fiber composite material preparation, in particular to a high-strength fiber composite material and a preparation method thereof. The preparation method comprises the following steps: step 1, impregnating high-strength fibers in a liquid crystal polymer modified liquid, carrying out ultrasonic treatment, and drying to obtain modified fibers; step 2, mixing epoxy resin with an amine curing agent, adding an imidazole accelerant, and uniformly stirring to obtain a resin matrix; and step 3, adding the modified fiber into a resin matrix, and carrying out melt extrusion granulation to obtain the high-strength fiber composite material. The prepared high-strength fiber composite material has remarkable advantages in mechanical property, the liquid crystal polymer modifies and enhances interface bonding, a formed network structure disperses stress, the bearing capacity is remarkably improved, the tear resistance is enhanced, a stable fiber-matrix interface effectively transmits stress, the liquid crystal polymer absorbs and disperses energy, and the high-strength fiber composite material is not prone to being damaged when being impacted, and has a good application prospect. The thermal aging resistance is excellent, and the comprehensive performance meets various application requirements.

The utility model discloses a radial tire for engineering machinery, which relates to the field of tire design and comprises a tire tread, a linear pattern wall and a U-shaped pattern wall are fixedly mounted on the periphery of the tire tread, a first reinforcing rib is fixedly mounted between the linear pattern wall and the U-shaped pattern wall, and a second reinforcing rib is fixedly mounted between the linear pattern wall and the U-shaped pattern wall. Side pattern walls are fixedly mounted on the periphery of the tire tread and located on the front side and the rear side of the linear pattern wall, shoulder pattern walls are fixedly mounted on the periphery of the tire tread and located on the front side and the rear side of the side pattern walls, and shoulder grooves are formed in the surfaces of the shoulder pattern walls. The height of the first reinforcing ribs is reasonably arranged, the connecting strength between the pattern walls is enhanced, the overall tear resistance is improved, the second reinforcing ribs are matched, the overall rigidity of the tire is remarkably enhanced, the performance of the tire is improved, and the service life of the tire is prolonged.

The application relates to the technical field of flame-retardant polyols and applications thereof, and discloses a reaction-type flame-retardant polyol, a preparation method and application of the reaction-type flame-retardant polyol in high-strength high-resilience tear-resistant long-lasting flame-retardant polyurethane soft foam, the reaction-type flame-retardant polyol has the following structure: wherein the structure of R includes any one of three structures, and n is any number in 2-4; based on the structure design, the reaction-type flame-retardant polyol is introduced into the polyurethane soft foam, so that the prepared polyurethane soft foam has excellent comprehensive performances such as high strength, high resilience, tear resistance and high flame retardancy, and can meet the requirements of safety, comfort and mechanical properties of materials in more extensive application fields.

The invention relates to the technical field of adhesives, in particular to a polyurethane adhesive and a preparation method thereof. The adhesive is prepared from the following components in parts by weight: 60 to 90 parts of total polyol, 20 to 24 parts of isocyanate, 5.5 to 6 parts of a chain extender and 3 to 8 parts of a nano reinforcing material. According to the polyurethane adhesive, polyether polyol polypropylene glycol containing long-chain alkyl and hydroxyl-terminated hydrogenated polybutadiene are introduced into a polyurethane prepolymer to jointly serve as components of polyol, the components react with diisocyanate TDI to generate polyurethane, and then the polyurethane is compounded with nano SiO2 to prepare the polyurethane adhesive. The prepared polyurethane adhesive is high in tensile strength, large in toughness and good in tear resistance, has good adhesion to a PP base material, and solves the problems that a traditional polyurethane adhesive is low in adhesion strength to the PP base material, poor in heat resistance and depends on pretreatment.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

The utility model provides an explosion-proof composite pipe for a medical water jet scalpel. The explosion-proof composite pipe comprises an inner pipe, and a woven reinforcing layer, a protective layer and a high-temperature-resistant layer which are sequentially arranged on the outer side of the inner pipe from inside to outside, the inner pipe is made of a nylon material; the woven reinforcing layer is made of a bulletproof fiber material; the protective layer is made of a TPU (Thermoplastic Polyurethane) material; according to the design, the bulletproof fiber material is adopted as the woven reinforcing layer to be arranged on the outer side of the inner pipe, the explosion-proof capacity of the inner pipe is greatly improved, the protective layer made of the TPU material is arranged outside the woven reinforcing layer for protection, and the TPU protective layer has the characteristics of high elasticity, high tear resistance and the like and is arranged on the outer side of the woven reinforcing layer, so that the explosion-proof capacity of the inner pipe is greatly improved. The high-temperature-resistant layer is additionally arranged on the outer side of the woven reinforcing layer for protection due to the fact that the high-temperature-resistant performance of the TPU material is low, and the bursting pressure of the composite pipe can meet 36250 PSI.

The invention provides fluorine-containing hyperbranched polysiloxane modified resin and a preparation method thereof as well as an unvulcanized silica gel soft film and a preparation method thereof, and belongs to the field of silica gel molds. After the fluorine-containing hyperbranched siloxane is introduced, the fluorine-containing hyperbranched siloxane is large in size and higher in polarity than methyl, the regular spiral structure of a main chain can be broken, close packing between molecular chains is reduced, crystallization driving force is reduced, shrinkage caused by crystallization is inhibited, and it is guaranteed that in the preparation process of parts with complex structures formed by the composite material, the specific surface area of the composite material is increased; and the final part tolerance is small. The fluorine-containing hyperbranched polysiloxane can improve the entanglement density of a molecular chain and limit the free contraction movement of the vulcanized molecular chain, and meanwhile, the fluorine-containing hyperbranched chain segment can absorb energy through deformation under the action of external force, so that the tear toughness, tensile strength and reusability of the mold are remarkably improved.

The invention discloses a fiber-reinforced instrument panel for inhibiting blasting and splashing of an air bag and a preparation method of the fiber-reinforced instrument panel. The instrument panel comprises a high-toughness bearing framework layer, a gradient energy guide layer and a high-ductility surface layer from inside to outside. And the dynamic tear propagation resistance of the gradient energy guide layer is accurately set in a range which is greater than the dynamic energy release rate of the blasting of the air bag and less than the tear resistance of the bearing framework layer. Therefore, under the impact of the air bag, the cracks of the instrument desk can be uniquely subjected to controllable zipper type tearing along the preset gradient layer path instead of random fragmentation, so that fragment splashing is fundamentally inhibited. The invention further provides an integrated preparation method of the instrument desk, and a product with a complex gradient structure is efficiently and accurately manufactured through compression molding of the framework and a multi-material co-extrusion and secondary injection molding combined process. The passive safety of the automobile is greatly improved, and light weight and low cost are both considered.

This invention relates to the field of insulation materials technology, specifically to a high-strength, tear-resistant, halogen-free, flame-retardant insulating material and its preparation method. The high-strength, tear-resistant, halogen-free, flame-retardant insulating material comprises the following components by weight: 70-90 parts EPDM rubber, 5-15 parts thermoplastic elastomer, 15-25 parts medium-density polyethylene, 10-20 parts ethylene-vinyl acetate copolymer, 3-5 parts triallyl isocyanate, 2-4 parts sulfur, 1-3 parts polyethylene wax, 3-5 parts zinc oxide, 1-3 parts antioxidant, 30-50 parts aluminum hydroxide, 20-40 parts modified silica, 0.2-0.5 parts ultraviolet absorber, 1-3 parts accelerator, and 2-4 parts silicone masterbatch. The high-strength, tear-resistant, halogen-free, flame-retardant insulating material prepared by this invention exhibits excellent tensile and tear resistance and flame-retardant properties, thereby extending its service life.

This application provides a flame-retardant silicone and its preparation method. In this flame-retardant silicone, through the synergistic effect of boron-containing polysiloxane prepolymer and functionalized boron nitride, the flame-retardant silicone has an afterflame time of ≤5s at 800℃, an oxygen index of ≥36%, and has passed UL94V-0 certification. It can quickly form a ceramic barrier layer at high temperatures, effectively preventing flame propagation. The helical structure of the siloxane main chain, combined with the reinforcing effect of functional fillers such as nano-fumed silica, low-melting-point glass powder, and activated inorganic smoke suppressant and flame retardant, makes the tensile strength of the flame-retardant silicone ≥45N, and the permanent tensile modulus retention rate ≥85% under 125% radial shrinkage, exhibiting excellent tear resistance. This flame-retardant silicone is suitable for applications requiring high flame-retardant performance, such as new energy cables and electronic device protection.

The invention belongs to the technical field of metal material surface treatment, and particularly discloses a home appliance color-coated sheet cured by adopting an EB curing technology and a preparation method of the home appliance color-coated sheet. The home appliance color-coated sheet cured by adopting the EB curing technology comprises a hot galvanizing substrate, a UV primer layer, an EB finish paint layer and a protective film, and the protective film is prepared from the following raw materials in parts by weight: 60-65 parts of low-density polyethylene, 12-15 parts of ethylene-vinyl acetate copolymer, 6-9 parts of nano tackifying clay, 3-5 parts of chopped polyurethane fiber, 1-3 parts of antioxidant and 2-4 parts of dispersing agent. According to the protective film, multiple components are synergistically matched, so that the protective film has good mechanical strength, good flexibility, low possibility of brittle failure, high durability, damage resistance, tear resistance, puncture resistance and wear resistance, and can effectively resist scraping and collision of household appliance plates in transportation and installation processes.

The application discloses a self-repairing flexible bionic composite material with high tear resistance and a preparation method thereof. The method is characterized in that a room-temperature self-repairing flexible polyurea elastomer SSPU is prepared by reacting THI, DBI and PDMS. The self-repairing flexible bionic composite material with high tear resistance is prepared by physically mixing the room-temperature self-repairing flexible polyurea elastomer SSPU and a gallium-indium-tin liquid alloy. The self-repairing flexible bionic composite material has the advantages of not affecting the flexibility of the material, greatly improving the tear resistance of the material, and having excellent photo-thermal response characteristics and fast photo-thermal repair capacity, and is suitable for preparing various stretchable and functional devices.

This invention discloses a low rolling resistance, high wear resistance, tear resistance, and energy-saving conveyor belt cover rubber and its preparation method, belonging to the technical field of conveyor belt cover rubber. The cover rubber is a vulcanized rubber composite with a self-layering structure, comprising, sequentially from the working surface of the cover rubber to the bonding surface with the belt core. This invention utilizes a vulcanized rubber composite with a self-layering structure to form a wear-resistant surface layer, a tear-resistant intermediate layer, and an adhesive bottom layer sequentially from the working surface to the bonding surface with the belt core. By utilizing the selective distribution of oxidized carbon nanospheres, modified basalt short fibers, and modified layered silicates during the latex co-precipitation process, the concentration of oxidized carbon nanospheres in the wear-resistant surface layer is not less than 85% of the total, the concentration of modified basalt short fibers in the tear-resistant intermediate layer is not less than 80% of the total, and the adhesive bottom layer is a pure rubber layer. This achieves a synergistic improvement in low rolling resistance, high wear resistance, and high tear resistance in a single cover rubber, resolving the contradiction that traditional cover rubbers struggle to achieve these properties simultaneously.

The invention discloses an anti-piping device which has the following advantages that (1) modular design is adopted, specifically, a square air bag cushion is quickly spliced through a connecting assembly and a fixing assembly, and the square air bag cushion is flexible, adapts to different dam shapes and is flexible in construction; (2) dual counterweight stability: the first counterweight assembly tightly presses the junction of the adjacent airbag cushions, the second counterweight assembly enhances the bottom anti-scouring capability, and the overall water flow impact resistance is high; (3) structure optimization: the square air bag parts are arranged, distributed and communicated, pressure is dispersed, and local stress concentration is avoided; the double-layer composite material (the braided fabric outer layer and the rubber inner layer) has both strength and tear resistance, and the service life is prolonged; and (4) rapid deployment: an inflation joint supports rapid inflation and deflation, and transportation and emergency response are facilitated.

This utility model discloses a wear-resistant car floor mat, specifically relating to the field of car floor mat technology, comprising: a floor mat body; the floor mat body includes a base layer, with reinforcing layers symmetrically arranged on both sides of the base layer, a composite layer arranged on the top side of the upper reinforcing layer, and a waterproof layer arranged on the bottom side of the lower reinforcing layer; and a wear-resistant layer arranged on the top side of the composite layer. This utility model, by setting the wear-resistant layer, can greatly enhance the wear-resistant protective performance of the floor mat body, and the breathable layer arranged on the bottom side of the wear-resistant layer can give the floor mat body good breathability. Combined with the antibacterial layer and the absorbent layer, it can effectively absorb and purify viruses and bacteria, thereby greatly improving the antibacterial protective performance of the floor mat body; by setting the reinforcing layer, which consists of an elastic layer and a toughening layer, the elastic layer can greatly enhance the compressive strength of the floor mat body, and the toughening layers on both sides can give the floor mat body strong tensile and tear resistance.

The invention discloses mine tire sidewall rubber and a preparation method thereof, and relates to the technical field of tires. According to the technical scheme, the rubber comprises the following components in parts by weight: 100 parts of a rubber matrix, 40-55 parts of carbon black, 8-15 parts of basic aluminum sulfate, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 3-6 parts of a composite anti-aging agent, 1-2 parts of microcrystalline wax, 3-5 parts of tackifying resin, 1.8-2.2 parts of sulfur and 1.3-2.1 parts of an accelerant, the composite anti-aging agent is prepared from an anti-aging agent BXA, an anti-aging agent 3100 and an anti-aging agent 4020 according to the weight ratio of (1 to 2): (0.5 to 1.5): (1 to 1.5). According to the invention, the original ternary composite anti-aging agent is matched with the basic aluminum sulfate, so that the technical problem that high flex resistance and high tear resistance of traditional sidewall rubber are difficult to consider under mine working conditions is solved on the premise of not sacrificing processability and elasticity.

The application discloses an ethylene propylene acrylate rubber composition for automobile engine, which is made of raw materials including the following components in parts by weight: 85-95 parts of ethylene propylene acrylate rubber, 5-15 parts of acrylate rubber, 1-2 parts of stearic acid, 1-3 parts of antioxidant, 10-20 parts of plasticizer, 50-80 parts of carbon black, 1.5-2.5 parts of vulcanizing agent, 2-5 parts of accelerator, and 1.5-3 parts of internal release agent. Compared with traditional acrylate mixing rubber, the composition has relatively higher elongation at break, tear resistance, high-temperature compression set resistance, oil resistance and aging resistance, can meet the strict index requirements of high-end vehicles and is suitable for specific use environment. The application further discloses application of the ethylene propylene acrylate rubber composition for automobile engine in preparation of automobile engine cooling hose.

The invention discloses tear-resistant sound insulation cotton for electric appliances and a preparation method of the tear-resistant sound insulation cotton. The tear-resistant sound insulation cotton is prepared from the following components in parts by mass: 20-35 parts of thermoplastic polyurethane; 10 to 15 parts of basalt fiber; 8 to 12 parts of a halogen-free phosphorus-nitrogen flame retardant; 3-5 parts of a chemical foaming agent; 0.1 to 0.5 part of a waterborne polyurethane composite emulsion; and the balance of bio-based polyester. Through melt blending of thermoplastic polyurethane and bio-based polyester and combination of basalt fiber reinforcement and gradient foaming design, the comprehensive performance of the sound insulation cotton is remarkably improved; due to the high elasticity and tear resistance of thermoplastic polyurethane, the mechanical strength of bio-based polyester is effectively improved, and the tear resistance of the sound insulation cotton is improved; the chemical foaming agent forms a multi-stage pore structure with a compact surface layer and a loose inner layer through a gradient foaming technology, broadband efficient absorption can be achieved for noise of different frequency bands, and vibration noise generated when an electric appliance runs is remarkably reduced.

The invention discloses a paper diaper with a reinforced bottom film non-woven fabric structure and a preparation method of the paper diaper, and belongs to the technical field of life hygienic products. The preparation method comprises the steps that a bottom layer base material is prepared and pressed to form concave-convex lines, and reinforced bottom layer non-woven fabric is obtained after cooling; the surface layer and the mixed core body are compounded to obtain an absorption core body, and then the absorption core body and the breathable leakage-proof film layer are laminated to obtain a composite body; by identifying the concave parts and the convex parts of the concave-convex lines, different glue amounts are respectively coated, and the reinforced bottom layer non-woven fabric and the composite body are compounded into a main body composite layer by adopting segmented gradient pressing; and finally, mounting a guard, a waistline and hook-and-loop fasteners, cutting and thermally sealing edges to obtain a finished product. The paper diaper structurally comprises a reinforcing bottom film layer with periodical concave-convex lines, different glue amounts are distributed on the concave portions and the convex portions of the reinforcing bottom film layer, a breathable leakage-proof film and an absorption core layer are combined, the tear resistance of the bottom film is enhanced, and meanwhile breathability and wearing comfort are effectively considered.

The utility model discloses a tear-resistant ethylene propylene diene monomer rubber bushing, which relates to the technical field of rubber parts and comprises a bushing mixture, annular reinforcing raised lines and vertical reinforcing raised lines are fixed on the outer end face of the bushing mixture, and the annular reinforcing raised lines and the vertical reinforcing raised lines are crossed and fixed to form a reinforcing net. The tear resistance of the bushing mixture is improved, and the external load is dispersed; the inner and outer edges of the upper and lower ends of the bushing mixture are provided with fillet surfaces; the tear-resistant ethylene propylene diene monomer lining is provided; the annular reinforcing protruding strips and the vertical reinforcing protruding strips are arranged on the end face of the outer side of the bushing mixture, the tear resistance of the bushing is remarkably improved, the fillet faces are arranged on the inner edge and the outer edge of the upper end and the lower end of the bushing mixture, the stress concentration coefficient is remarkably reduced, the overall tear resistance of the bushing is further improved, and the service life of the bushing is further prolonged. The bushing is reasonable in structural design, is suitable for high-load, high-frequency vibration and complex working conditions, can be widely applied to the fields of automobiles, machinery and the like, and has remarkable economic benefits and market prospects.