137 results about "Reinforced rubber" patented technology

The invention discloses a multifunctional foam pad made of a regenerated composite material and a production process of the multifunctional foam pad, and belongs to the technical field of production of regenerated composite materials. The surface of the recycled PET non-woven fabric printing layer is provided with 50 + / -5 [mu] m micropores, the cat palm bionic gradient foaming layer (the density is 0.15-0.35 g / cm < 3 > gradient distribution) is formed by blending and foaming PVC recycled materials, PET bottle chips and waste rubber powder, and the glass fiber net reinforced rubber matrix layer and the triangular pyramid micro-sucker bottom layer are arranged from top to bottom. The preparation process comprises the steps of waste material near-infrared sorting and pretreatment, multi-stage dynamic blending granulation, supercritical CO2 gradient foaming, bionic calendaring forming and laser positioning hot-pressing compounding, high-valued utilization of multi-element waste materials is achieved through combination of bionic structure design and a green process, the product has sound insulation, buffering and anti-skid performance, the tear resistance is improved by 150%, and the service life of the product is prolonged. The problems that a traditional foaming cushion depends on raw plastic, is single in function and causes manufacturing pollution are solved, and resource circulation and function strengthening unification are achieved.

The invention belongs to the technical field of high polymer materials, and discloses a high-temperature-resistant nano-reinforced rubber composition and a preparation method thereof.The rubber composition comprises 50-65 parts of a rubber matrix, 25-40 parts of a gradient filler system, 1.5-3 parts of a metal oxide modifier, 2-4 parts of a resin vulcanizing agent and 0.8-1.5 parts of a synergistic stabilizer; the gradient filler system is formed by compounding surface hydroxylation modified micron-sized hollow glass beads and nano-sized boron nitride according to a mass ratio of 3: 1-5: 1. According to the invention, a gradient distribution system of the micron-sized hollow glass beads and the nano-sized boron nitride is constructed to form a three-dimensional interpenetrating support network, so that the tensile strength retention rate of the material at a high temperature of 180 DEG C is increased to 85% or above, and is increased by about 15% compared with that of a traditional carbon black or white carbon black system.

The utility model discloses a kind of non-woven fabric environmental protection cloth bag, it relates to non-woven fabric cloth bag field, including non-woven fabric cloth bag main body, two cloth bag handles are symmetrically fixed and installed on the outer wall upper side of non-woven fabric cloth bag main body, several protruding blocks are evenly fixed and installed on the inner wall upper side of non-woven fabric cloth bag main body, bag mouth reinforcing structure is fixed and installed on the inner wall upper side of non-woven fabric cloth bag main body, bag mouth reinforcing structure is simultaneously set on several protruding blocks, bag mouth reinforcing structure is composed of first reinforcing rubber belt and adhesive layer, by setting several protruding blocks on the inner wall upper side of non-woven fabric cloth bag main body, simultaneously setting the bag mouth reinforcing structure composed of first reinforcing rubber belt and adhesive layer on the inner wall upper side of non-woven fabric cloth bag main body, and make protruding block and bag mouth reinforcing structure cooperate, significantly improve the structural stability of the bag mouth of non-woven fabric cloth bag main body, avoid due to frequent use or load heavy object leading to non-woven fabric cloth bag main body bag mouth edge abrasion, cracking, prolong the service life of non-woven fabric cloth bag main body.

The present application relates to a kind of epoxy resin binder for elastic pavement and its preparation method, the preparation method of epoxy resin binder includes the following steps: S1, the diluent, epoxy resin and curing agent with the molar ratio of (1-2.5) : 1 : (0.23-0.4) are mutually soluble and stirred to react, after the reaction is cooled to room temperature, accelerator is added and stirred, to obtain epoxy resin binder;Wherein, the weight of the accelerator accounts for 0.8-1.4% of the sum of the weight of the diluent, the epoxy resin and the curing agent;S2, the filler and the epoxy resin binder with the mass ratio of (0.7-1.4) : 1 are stirred to obtain epoxy resin binder.The epoxy resin binder can effectively enhance the durability of rubber elastic pavement.

The invention discloses a composite riveting connection structure of an automobile shock absorber hydraulic hose, which comprises a hose, a connection joint and a riveting claw, the hose is a braided wire reinforced rubber hose, the connection joint comprises a lining core and a steel sleeve, one end of the lining core is welded with a hard pipe, and the other end of the lining core is inserted into the hose; the end, inserted into the hose, of the lining core is sleeved with a steel sleeve, the steel sleeve is sequentially provided with a flat riveting fastening section and a point riveting buffering section in the axial direction of the steel sleeve, the flat riveting fastening section and the point riveting buffering section are coaxially and integrally formed, the flat riveting fastening section is a full-circumference compression area with inner protrusions of the steel sleeve, and the point riveting buffering section is a local compression area with circumferential arc-shaped protrusions after extrusion. The riveting claw extrudes the steel sleeve to achieve fixed connection of the hose and the lining core, and bosses matched with the flat riveting fastening section and the point riveting buffering section respectively are arranged in the riveting claw. The braided wire reinforced hose with the inner diameter of 5-12 mm is matched, the tensile strength is larger than or equal to 11 kN under the working pressure of 13-35 MPa, the ultimate pulse service life reaches 2,000,000-2,000,000 times, and the lightweight and high-pressure performance requirements of new energy automobile suspension shock absorbers are met.

The utility model relates to a kind of shielded braided reinforced rubber jacketed flexible cable of coal mining machine, it includes three power cables and a control cable with same outer diameter and rectangular array arrangement, ground cable is provided between the control cable and three power cables;The control cable includes four control wire cores with rectangular array arrangement and control wire core coating layer being arranged outside four control wire cores, first gap filling adhesive tape is provided between adjacent two control wire cores and control wire core coating layer, tensile wire is provided in the first gap filling adhesive tape;Control cable and three power cable outside are sequentially provided with inner sheath, braided reinforcing layer and outer sheath from inside to outside, second gap filling adhesive tape is provided between adjacent two power cables and inner sheath and between inner sheath and adjacent power cable and control cable, tensile wire is provided in the second gap filling adhesive tape.

This invention belongs to the technical field of carbon fiber reinforced rubber composite materials, specifically relating to an ablation-resistant, high-interfacial-strength carbon fiber-rubber composite material and its preparation method, comprising: modified rubber and modified carbon fiber cloth; the modified rubber comprises the following components by mass: 100 parts NBR, no less than 40 parts silane coupling agent modified silica, and no less than 30 parts ceramizable mineral filler; the modified carbon fiber cloth is a modified carbon fiber cloth treated with modified RFL impregnation solution; by introducing modified silica and ceramizable filler into the rubber matrix, and simultaneously subjecting the carbon fiber cloth to surface oxidation treatment and modified RFL impregnation modification treatment, through the joint optimization of the rubber matrix and reinforcing fibers, the composite material possesses excellent ablation resistance and overall mechanical properties, enabling it to meet the service conditions of extreme environments such as ablation resistance and particle flow erosion resistance, and has great application potential in aerospace, fireproof cables and other fields.

This invention discloses an environmentally friendly bio-based reinforcing compound and its preparation method. The compound, by weight, comprises: 100 parts EPDM rubber, 15-25 parts modified epoxidized soybean oil, 40-60 parts silane-modified rice husk ash silica, 2-2.5 parts peroxide, 1.5-2.5 parts crosslinking agent, and 5-7 parts additives. The modified epoxidized soybean oil is prepared by reacting epoxidized soybean oil with N-(2-hydroxyethyl)itaconic acid monoamide, followed by a reaction with a bio-based quaternary ammonium salt. This invention uses bio-based materials to replace traditional petroleum-based materials, resulting in excellent environmental performance. The introduction of modified epoxidized soybean oil significantly improves the compatibility and dispersibility of the bio-based reinforcing material with the rubber matrix, giving the compound excellent tensile strength, elongation at break, damping properties, antibacterial properties, and fatigue resistance. It can be widely used in automotive seals, shock absorbers, and other fields.

The utility model relates to the technical field of wire harness devices, and discloses a wire harness device for power transmission, which comprises a power transmission cabinet body, a wire harness support plate is arranged in the power transmission cabinet body, a wire harness mounting groove is arranged on the outer wall of the wire harness support plate, and a wire harness mechanism for fixing wires is arranged in the wire harness mounting groove. The wire bunching mechanism comprises a wire harness supporting block, a wire harness connecting block, a wire harness limiting block, a first threaded ferrule and a second threaded ferrule, the first threaded ferrule is provided with an anti-wear mechanism, the anti-wear mechanism comprises a reinforcing rubber ring and an anti-wear threaded sleeve, the second threaded ferrule is provided with a protection mechanism, and the protection mechanism comprises a rubber protection ferrule. And through cooperation of a first threaded ferrule, a second threaded ferrule, a rubber protection ferrule, a reinforcing rubber ring and an anti-wear threaded sleeve, the electric wire can be protected conveniently.

A microwave oven panel supporting rod positioning and supporting reinforcing structure comprises a panel arranged on one side of a cavity and a supporting rod assembled on the panel, a positioning supporting hole is formed in the panel, a supporting column is arranged on the supporting rod, the supporting column is rotationally connected with the positioning supporting hole, a reinforcing rubber part is arranged on the supporting column, and the reinforcing rubber part is fixedly connected with the supporting rod. Reinforcing ribs are arranged on the two sides of the positioning supporting hole respectively and connected with the panel. The microwave oven panel supporting rod positioning and supporting reinforcing structure has the advantages that the supporting rod is fixedly installed on the microwave oven panel and does not need to be additionally processed by a user, a reinforcing rubber part is additionally arranged on the supporting column of the supporting rod, reinforcing ribs are additionally arranged on the panel supporting rod for positioning and supporting, and supporting is reliable and firm; the reinforcing ribs are arranged on the two sides of the positioning supporting hole respectively, the strength and rigidity of the panel in the supporting rod positioning area can be improved through the reinforcing ribs, the situation that the positioning supporting hole deforms and cracks due to operation such as frequent door opening and closing is avoided, it is ensured that the supporting rod is accurately positioned, the microwave oven door is smoothly and stably opened and closed, and the structural stability is improved.

The invention discloses a three-dimensional numerical simulation method capable of predicting constitutive behaviors of a chopped aramid fiber reinforced rubber composite material. According to the simulation method, a finite element numerical model is adopted, the finite element numerical model is a three-dimensional cuboid model, a model main body is a rubber matrix, chopped aramid fibers are randomly distributed in the model, the chopped aramid fibers are cylindrical, and the contact relation between the rubber and the chopped aramid fibers is simulated by adopting a finite element embedding unit technology. Grids of the rubber and the chopped aramid fibers in the embedded unit model are mutually independent and are in regular shapes, uniaxial stretching of the chopped aramid reinforced rubber composite material is simulated by adopting a mixed boundary condition, and a stress-strain curve of the chopped aramid reinforced rubber composite material is obtained. Compared with a traditional three-dimensional finite element model, the model obtained through the simulation method is high in mesh quality, suitable for the situation that the ratio of the fiber modulus to the matrix modulus is large and the length-diameter ratio of fibers is large, and capable of truly simulating the constitutive mechanical behavior of a test piece.

The invention relates to a calendering system (100') that manufactures reinforced rubber sheets comprising one or more reinforcements (200) positioned between two layers of unvulcanized rubber comprising an upper skim (SSUP) and a lower skim (SINF). The calendering system incorporates a sheet mass control system comprising: - a first virtual sensor that performs a preliminary prediction of the mass of the manufactured sheet; - a second virtual sensor that performs a dynamic estimation of the density of the rubber mixture constituting the upper and lower skims; and - a third virtual sensor that calculates the average ratio between the mass of the upper and lower skims and the sum of the spacings between pairs of cylinders (102, 104) over the last 100 meters of the manufactured sheet; so that a mass prediction is obtained prior to an actual measurement of the mass of the manufactured sheet. Figure for the abstract: Fig. 3

A rubber-reinforcing cord (62) of the present invention is a rubber-reinforcing cord for reinforcing a rubber product (60), and has at least one thread. The thread includes at least one tow, and a first coating film provided so as to cover at least a part of a surface of the tow. The tow includes a carbon fiber filament. The first coating film includes a rubber component and a cross-linking agent. The rubber-reinforcing cord (62) further includes a liquid component, and the content of the liquid component in the rubber-reinforcing cord (62) is in a range of 0.2 mass% or more and 13 mass% or less.

The invention provides a composition for forming vulcanized rubber, the vulcanized rubber as well as a preparation method and application of the vulcanized rubber. The composition for forming vulcanized rubber comprises the following components in parts by weight: 100 parts of matrix rubber, 50-70 parts of filler, 1-3 parts of bonding resin, 2.7-7.5 parts of a bonding agent, 1.5-5 parts of an anti-aging agent, 5-13 parts of zinc oxide and 2.5-10 parts of a vulcanizing agent, wherein the matrix rubber comprises natural rubber and epichlorohydrin rubber; the vulcanizing agent comprises ethylene thiourea. Through the synergistic effect of the epichlorohydrin rubber, the ethylene thiourea and the zinc oxide, the modulus and the aging resistance of the prepared vulcanized rubber can be remarkably improved, the bonding strength of the rubber and a tire carcass steel wire is enhanced, and the high bonding strength can be maintained even under the harsh thermo-oxidative aging and damp-heat aging conditions.

The utility model discloses a multi -angle shower head positioning fixed bolster, including mounting panel and mounting support, the bottom of mounting panel is provided with two mutually symmetrical lugs, and the bottom of two lugs is connected with same guide ring, the top of mounting support is provided with annular groove, through the guide ring and symmetrical lug of mounting plate bottom and the annular groove of the top of mounting support that sets up with guide ring is adapted, can realize mounting support along the rotation of mounting plate 360 DEG, and through the toothing of the self -lock block sliding arrangement between the tooth ring and the lug in and carries out the meshing, thereby realizes the angle limit fixing between mounting panel and mounting support, and through the setting of two screw rods and rubber clamp block, can be convenient to the self -adaptation clamping of shower head, and because the outer rubber of rubber clamp block can enhance the friction between rubber clamp block and shower head, thereby realizes the purpose of clamping fixed in the mounting hole of shower head.

The invention provides a graded core-shell structure multifunctional nanofiller, a preparation method and a reinforced rubber composite material, and belongs to the field of nanomaterials and high polymer materials. The method comprises the following steps: (1) by taking nano calcium carbonate as an inner core, depositing a layer of zinc oxide film on the surface of the nano calcium carbonate by adopting an atomic layer deposition technology to form a CaCO3-ZnO core-shell structure intermediate; and (2) carrying out a reaction on the CaCO3 (at) ZnO core-shell structure intermediate obtained in the step (1) and a silane coupling agent, so that silane coupling agent molecules are grafted to the surface of the CaCO3 (at) ZnO core-shell structure intermediate, and thus obtaining the graded core-shell structure multifunctional nanofiller. According to the preparation method, the technological process is simplified, and the production stability and efficiency are improved. The prepared multifunctional nanofiller realizes co-localization of enhancement, vulcanization activation and coupling functions on the nanoscale, ensures the most efficient synergistic effect, and brings excellent comprehensive mechanical properties.

Pneumatic tire (1) that can be mounted on a predetermined rim tapered by 15°, wherein the pneumatic tire (1) comprises the following: a pair of bead sections (20) arranged on each side of a tire equatorial plane (CL) in a tire transverse direction; a tire bead core (21) which is provided in each of the two bead sections (20); a carcass (6) which is supported by the pair of tire bead cores (21), the carcass comprising a carcass body part (61) and a carcass refold section (62) formed by the carcass (6) which refolds back on the tire bead core (21); a steel cord reinforcement layer (35) arranged on an outer surface of the carcass (6) which is folded back on the tire bead core (21); a bead rubber layer (K), wherein at least one section thereof is arranged between the carcass body part (61) and the carcass refolding section (62); and a first reinforcing rubber layer (L) arranged adjacent to an outer edge section (35E) of the steel cord reinforcing layer (35) located outwards in the tire radial direction, and an outer edge section (62E) of the carcass foldback section (62) located outwards in the tire radial direction, wherein the first reinforcing rubber layer (L) extends outwards in the tire radial direction; wherein the bead rubber layer (K) comprises a second reinforcing rubber layer (K1) arranged adjacent to the tire bead core (21) and a shock-absorbing rubber layer (K2) arranged adjacent to the second reinforcing rubber layer (K1), wherein the shock-absorbing rubber layer (K2) is located between the carcass body part (61) and the first reinforcing rubber layer (L); where, if the pneumatic tire (1) is not mounted on the specified rim, a distance from a second line segment (J) to a third line segment (F) is 4 mm to 12 mm, a complex modulus of the first reinforcing rubber layer (L) is between 6 MPa and 10 MPa, the elongation at break of the first reinforcing rubber layer (L) is 300% to 450%, a complex modulus of the second reinforcing rubber layer (K1) is 10 MPa to 15 MPa, and a complex modulus of the shock-absorbing rubber layer (K2) is 2 MPa to 6 MPa, wherein a first line segment (D) passes through an outermost projection point (E) of the tire bead core (21) in the transverse direction of the tire and is parallel to a longest side of the tire bead core (21), a side (P) of a bead base section (26) is closer to a bead heel (27), where the bead base section (26) is a section of the bead section (20) and is configured to come into contact with the specified rim, a curved line (G) of a tire outer surface (40), where the tire outer surface (40) is a section of the bead section (20), is arranged in the tire transverse direction outwards from the bead base section (26), a first intersection point (H) of the side (P) and the curved line (G) exists, the second line segment (J) passes through the first intersection point (H) and is perpendicular to the first line segment (D), and the third line segment (F) passes through the projection point (E) and is perpendicular to the first line segment (D).

The invention relates to the technical field of textile equipment, and provides a high-friction collaborative roller system structure for winding heavy fabric and a processing method of the high-friction collaborative roller system structure, and the collaborative roller system structure comprises a driving winding roller with a dual-scale structure on the surface and a pressing roller sleeved with an anisotropic flexible sleeve. The surface of the driving winding roller is provided with macroscopic textures and micro pits located on bosses of the driving winding roller and is subjected to gas tufftriding treatment. The flexible sleeve is made of fiber reinforced rubber, and reinforced fibers are preferentially oriented in the circumferential tangential direction of the sleeve. The invention further provides a processing method of the driving roller and a preparation method of the sleeve. Through the synergistic effect of a double-scale structure, surface strengthening and the anisotropic sleeve, a stable multi-stage friction interface is formed in a clamping area, the winding friction force and stability are remarkably improved, the structure is slightly changed, the cost is low, and the device is suitable for industrial winding of high-gram-weight and high-tension fabric.

The application discloses a preparation method of a polydopamine modified boron carbide-zinc methacrylate coordination enhanced rubber-based radiation protection composite material, and relates to the technical field of radiation protection materials; the method comprises the following steps: dispersing boron carbide in a trisaminomethane buffer containing dopamine, and obtaining polydopamine modified boron carbide through a surface polymerization reaction; and then mixing the polydopamine modified boron carbide, zinc methacrylate and a rubber matrix, and vulcanizing to obtain a polydopamine modified boron carbide-zinc methacrylate coordination enhanced (zinc and nitrogen / oxygen on the surface of the modified boron carbide are coordinated) rubber-based radiation protection composite material; through multiple actions such as coordination enhancement and chemical crosslinking, the material has excellent neutron shielding performance and tensile performance, the preparation method is simple, the cost is low, and the material has a wide application prospect in the field of nuclear radiation protection.

A method of restoring an elastomer by providing an article containing a first elastomer and having a surface, contacting the surface with a layer conformal to the surface, and applying heat and pressure to the layer. The layer contains a second elastomer and a solute. The heat and pressure induce a transfer of the solute from the layer to the article.

The utility model discloses an all-terrain tire with high comfort, high road holding capacity and low noise, which comprises reinforcing rubber arranged between a cord fabric layer and sidewall rubber, the radial end of the reinforcing rubber and a belted layer have an overlapping area, and the axial projection of the reinforcing rubber can cover the deformation area of the sidewall. And the hardness of the reinforcing rubber is greater than that of the sidewall rubber and the cord fabric layer. According to the utility model, the reinforcing rubber is arranged between the cord fabric layer and the sidewall rubber to realize the balance of the bearing capacity and the damping capacity of the sidewall, and the closed reinforcing ribs are arranged in the transverse full patterns to form the closed cavity, so that the noise of the tire main body during driving is reduced; the axial reinforcing ribs are arranged in the transverse half patterns, so that the contact area between the tire crown and the road surface is increased, and the road gripping capacity of the tire is improved.

The present application relates to the field of carbon black reinforced rubber, in particular to carbon black reinforced rubber and a preparation method thereof.The preparation method of the carbon black reinforced rubber provided by the present application solves the problems of carbon black particle coarsening or sedimentation in the carbon black dispersion liquid during storage and standing or long-time homogenization of multiple phases by recycling breaking and dispersing carbon black in an organic solvent and then mixing the carbon black with a raw rubber solution in a turbulent flow, and the carbon black can be stably dispersed in the organic solvent in nanometer size without prior surface modification treatment, and the carbon black reinforced rubber can be produced by mixing the carbon black with the raw rubber solution, the subsequent conveying, mixing and flocculation are continuous and fast, and there are no problems such as obvious carbon black coarsening and sedimentation, so that high-quality dispersion of the carbon black in the raw rubber matrix can be realized without special equipment configuration and process control, the production device and process are mature technologies in the field of fluid mixing, and highly meet the needs of industrial production, and the carbon black reinforced rubber can be well produced by using a continuous process.

The present invention addresses the problem of providing a rubber composition having improved heat resistance while suppressing blooming and ensuring tackiness. The means for solving the problem is a rubber composition containing a rubber component, two or more sulfenamide-based vulcanization accelerators, and one or more thiuram-based vulcanization accelerators, wherein the content of each of the two or more sulfenamide-based vulcanization accelerators is 3.7 parts by mass or less per 100 parts by mass of the rubber component, and the total content of the two or more sulfenamide-based vulcanization accelerators is 4 parts by mass or more per 100 parts by mass of the rubber component.

The present application relates to the technical field of composite materials, and particularly relates to a carbon black rubber composite material and a preparation method thereof, which comprises the following raw materials in parts by mass: rubber 55-72 parts; reinforcing material 58-68 parts; antioxidant 2.8-4.3 parts; accelerator 1.1-1.8 parts; vulcanizing agent 1.3-2.5 parts; vulcanization aid 2-4.6 parts; plasticizer 5-9.3 parts; the carbon black rubber composite material is obtained by mixing the rubber with the reinforcing material, the vulcanizing agent and other aids, and then being placed in a mold for high-temperature vulcanization; wherein the multi-functional modification of part of the natural rubber is beneficial to the formation of a multi-crosslinking network of the rubber, the reinforcing material and other aids in the composite material; the reinforcing material is prepared from high-wear-resistance carbon black, a modified carbon black composition, zinc methacrylate and a modified attapulgite, and plays a synergistic role to effectively enhance the wear resistance and flex fatigue resistance of the rubber material, and has a wide application prospect.

The invention discloses a preparation method of a modified aramid pulp reinforced rubber material, and belongs to the technical field of rubber reinforced materials. The method comprises the following steps: firstly, forming micron-sized pores in the surface of aramid pulp through synergistic enzymolysis activation of diammonium hydrogen phosphate and cellulase; then nano TiO2 is embedded into the surface layer of the fiber under the assistance of ionic liquid, and a mechanical interlocking structure is constructed; and finally, carrying out surface treatment on the fibers through self-polymerization reaction of a silane coupling agent and dopamine in a Tris buffer solution, premixing the fibers with hydrogenated butadiene-acrylonitrile rubber, and refining by an open mill to obtain the modified aramid pulp reinforced rubber material. The surface structure of the aramid pulp is gradually improved through a bionic multi-stage modification process (multi-stage treatment of an anchoring layer, an embedding layer and a bonding layer, and construction of a'plant root system-soil 'bionic structure), so that the problem of insufficient improvement of the mechanical property of the aramid pulp enhanced hydrogenated butadiene-acrylonitrile rubber in the prior art is effectively solved, and the comprehensive performance of a rubber material is remarkably improved.

The invention discloses a modified aramid nanofiber / rubber composite material and a preparation method thereof.Aramid nanofibers with good water dispersibility are prepared through epoxy modification, the in-situ polycondensation effect of a silicate ester compound on the surfaces of the nanofibers is improved through a nucleophilic substitution reaction of epoxy groups and amino groups, ANFs (at) SiO2 is formed, and the modified aramid nanofiber / rubber composite material is prepared. The composite material with excellent physical and mechanical properties and ablation resistance can be obtained by using the ANFs (at) SiO2 reinforced rubber with lower parts by weight. In the ablation process, the nano silicon dioxide is firstly melted to form a protective film to coat the surface of the aramid nano fiber, so that the aramid nano fiber is prevented from being corroded and decomposed by heat flow, ceramic structures such as SiC and Si3N4 are generated in situ to promote densification of a carbon layer, and the ablation resistance of the rubber is remarkably enhanced.

The utility model discloses a building winter construction heating maintenance blanket which comprises two rubber pipes and a heating plate between the rubber pipes, the outer surfaces of the rubber pipes and the heating plate are sleeved with rectangular plates, and the air inlet ends of the rubber pipes are provided with filtering devices. According to the utility model, the double-layer rubber pipe structure is arranged, the outer layer is coated with the alkali-corrosion-resistant polyester fiber reinforcing layer, the inner layer is made of high-temperature-resistant silica gel, the air leakage device is additionally arranged between the rubber pipe and the heating plate, and the minimum mm isolation gap can be kept through the corrugated metal supporting net even if air leaks; leaked gas is discharged through a gas outlet through a gas outlet groove, a heating plate is prevented from being influenced, a three-stage filtering device for rough filtration, electrostatic adsorption and a precise filter screen are additionally arranged at the gas inlet end of the filtering device, particulate matter is prevented from entering the pipeline, the gas inflation reliability is improved, and the stability of the rubber pipe is enhanced by arranging a reinforcing mechanism; therefore, accelerated cracking under external transmission shaking is avoided.

The invention discloses a glass fiber reinforced rubber composite material and a preparation method thereof. The preparation method comprises the following steps: modifying the glass fiber by using an amino-epoxy silane compound coupling agent solution, and then stirring the modified glass fiber with part of the rubber matrix, the liquid interface compatilizer and silane-treated boron nitride in a closed container at a high speed to prepare uniform mixed slurry; and mixing the residual rubber matrix, the vulcanization system and the reinforcing filler, adding the mixed slurry, and carrying out mold pressing vulcanization to obtain the composite material. The compound coupling agent and the liquid interface compatilizer cooperatively construct a tough interface, a step-by-step process of prefabricated mixed slurry is combined, efficient dispersion and structural protection of the fibers and the functional filler are achieved, and the obtained composite material has excellent tensile strength and tearing strength, low dynamic heat generation and high thermal conductivity; the technical problems that traditional glass fiber reinforced rubber is weak in interface bonding, uneven in dispersion and single in function are solved.

The object of this invention is to provide a rubber composition that suppresses bloom and maintains tack while improving heat resistance. [Solution] A rubber composition comprising a rubber component, two or more sulfenamide-based vulcanization accelerators, and one or more thiram-based vulcanization accelerators, wherein the content of each of the two or more sulfenamide-based vulcanization accelerators is 3.7 parts by mass or less per 100 parts by mass of the rubber component, and the total content of the two or more sulfenamide-based vulcanization accelerators is 4 parts by mass or more per 100 parts by mass of the rubber component.