208 results about "Reinforced rubber" patented technology

To provide a tire, which is configured so that a communication device can be suppressed from being damaged due to heat evolved inside the tire during rolling.SOLUTION: The tire comprises a side reinforcement rubber 2 with a crescent-shaped cross section, arranged in a side wall part 1b of the tire, and a communication device 10 buried inside the tire. The side reinforcement rubber has a side reinforcement rubber joined part ate which end parts in a tire circumferential direction of the side reinforcement rubber are joined to each other. The whole of the communication device is positioned in a predetermined region Kr in the tire circumferential direction extending from a center in the tire circumferential direction of the side reinforcement rubber joined part to a tire-angle range of 90° with a predetermined position Kb in the tire circumferential direction away by 180° from the center as a center.SELECTED DRAWING: Figure 1

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 relates to the technical field of rubber conveying belts, in particular to a super-wear-resistant rubber conveying belt and a preparation method thereof.The super-wear-resistant rubber conveying belt is prepared by mixing solution polymerized styrene-butadiene rubber and butadiene rubber according to a certain proportion, and by means of high strength and high wear resistance of the solution polymerized styrene-butadiene rubber and good elasticity of the butadiene rubber, complementary advantages can be formed; therefore, the comprehensive performance of the rubber matrix is improved; according to the wear-resistant modified hybrid filler prepared from the graphene powder, the tannic acid, the nano silicon dioxide and the silane coupling agent KH-550, the wear resistance and the hardness of the rubber can be remarkably improved through the enhancement effect of graphene, the filling effect of the nano silicon dioxide and the coupling effect of the silane coupling agent, and moreover, the wear resistance and the hardness of the rubber are improved. The two-dimensional structure of the graphene enables the graphene to form an effective physical crosslinking point in the rubber, the mechanical property and the wear resistance of the rubber can be enhanced, and the nano silicon dioxide can reduce gaps among rubber molecular chains through a filling effect, so that the compactness and the wear resistance of the rubber are improved.

Calculating cord parameters of a textile reinforced rubber sheet moving in the machine direction includes: (a) illuminating an area on a side of the sheet with radiation; (b) obtaining a digital image of an illuminated area; (c) generating a digital image of the outer surface; and (d) calculating cord parameters. The elongated textile cords are preferably parallel to each other the elongated textile cords are orientated in a cross direction which is perpendicular to the machine direction. Scanning or static camera with a light source can be employed, wherein the light is directionally perpendicular to the plurality of cords. Cord count per unit length, cord spacing, the presence of missing cords, and / or the presence of shifted cords can be determined.

To provide a tire, which is configured so that a communication device can be suppressed from being damaged due to deformation of the tire during rolling.SOLUTION: The tire comprises a side reinforcement rubber 2 with a crescent-shaped cross section, arranged in a side wall part 1b of the tire, and a communication device 10 buried inside the tire. The side reinforcement rubber has a side reinforcement rubber joined part 2j having end parts in a tire circumferential direction of the side reinforcement rubber joined to each other. In a projection plane on which the tire is projected in the tire width direction, at least a portion of the communication device is overlapping with the side reinforcement rubber joined part.SELECTED DRAWING: Figure 1

The utility model is suitable for the technical field of multi-layer composite product structures, and provides an under-rail reinforced rubber base plate of a multi-layer composite structure and application of the under-rail reinforced rubber base plate. A plurality of grooves which intersect in the inclined direction are formed in the pillow touching layer and the rail touching layer, the multiple upper grooves which intersect in the inclined direction jointly form network grooves, and the network grooves divide the pillow touching layer and the rail touching layer of the base plate into a plurality of shoulder pads. Therefore, the reinforced under-rail base plate can enable stress to be uniformly dispersed, fatigue recovery is more than two times faster than that of an existing base plate, the rhombic groove channels of the base plate are opened, and the ventilation, cooling and drainage speed is high. And meanwhile, the rhombic shoulder pad of the base plate can effectively restrain sliding abrasion and tearing caused by impact stretching of the base plate.

The invention relates to the technical field of tire rubber manufacturing, and discloses a tread rubber composition containing modified liquid rubber. According to the rubber composition, solution polymerized styrene-butadiene rubber and butadiene rubber are used as rubber substrates to construct a rubber system, and high-specific-surface-area white carbon black (BET is greater than or equal to 180m / g) is also added into the rubber system. The modified liquid rubber is added into the rubber system. The modified liquid rubber is prepared by melting and grafting unsaturated regenerated liquid rubber and maleic anhydride in the presence of a free radical initiator, and waste tire resources are effectively utilized. The modified liquid rubber can be used as a wetting agent, a coupling agent and a cross-linking active matter in the tread rubber composition at the same time, can effectively improve the dispersibility of the white carbon black, enhance the interface bonding force of the white carbon black and the rubber composition, weaken the Payne effect and enhance the wear resistance of the rubber composition, and does not affect the rolling resistance and wet skid resistance of the rubber composition. And the low-energy-consumption requirement of a new energy automobile is met.

The utility model discloses a fiber skeleton reinforced rubber diaphragm plate which comprises a fiber skeleton reinforced layer and a rubber layer installed on the fiber skeleton reinforced layer in an attached mode, the rubber layer comprises an outer sealing rib, a U-shaped structure, a main body structure and an inner sealing rib, and the outer sealing rib and the inner sealing rib are both circular. The circular top end of the outer sealing rib is in smooth transition connection with the top end of one side groove wall of the U-shaped structure, the top end of the other side groove wall of the U-shaped structure is in smooth transition connection with the lower end of the body structure, and the upper end of the body structure is in smooth transition connection with the circular top end of the inner sealing rib. The fiber skeleton reinforced rubber diaphragm plate provided by the utility model has the characteristics of long service life, good service braking stability, high emergency braking sensitivity, safety and reliability.

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 provides a mining steel wire braided rubber tube which comprises an inner tube body, a reinforcing layer is arranged outside the inner tube body, the reinforcing layer comprises a braided layer and rubber adhered to gaps of the braided layer and the outer portion of the braided layer, and an outer tube body is arranged outside the reinforcing layer. The braid layer comprises a steel wire strand spirally wound on the surface of the inner pipe body, the steel wire strand comprises a plurality of steel wires, and a plurality of wire strands with the rotating direction opposite to that of the steel wire strand are further spirally wound on the surface of the inner pipe body. According to the mining steel wire braided rubber pipe provided by the utility model, the steel wire strands and the wire strands are braided on the inner pipe body by the braided layer through a specific structural design, so that a braided rib net can be effectively prevented from loosening, the overall structural strength of the rubber pipe is enhanced, the loading capacity of the rubber pipe is improved, and the service life of the rubber pipe is prolonged.

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 utility model relates to the technical field of thermo-sensitive paper labels, in particular to a thermo-sensitive label for a cold chain, which comprises a protective film layer, a printing layer, a water absorption layer, a weather-proof glue layer and a release paper layer, and the water absorption layer is arranged between the printing layer and the weather-proof glue layer. A blocking adhesive tape and a reinforcing adhesive tape are adopted to ensure firm combination with a pasted object; through the cooperation of the water accumulation area and the water absorption layer, water entering the weather-proof glue layer is absorbed in the water absorption layer, and the label is prevented from falling off from a pasted object in a low-temperature and high-humidity environment; the protective film layer is arranged on the printing layer, water blocking is conducted on printed characters of the printing layer, character blurring caused by the fact that the surface of the label is affected with damp is avoided, and the actual using effect of the label is improved.

The utility model relates to the technical field of dies, and discloses a writing brush box production and processing die which comprises a supporting plate, an upper die is arranged at the top of the supporting plate, a plurality of first connecting columns are fixedly connected to the bottom of the upper die, a plurality of clamping grooves are formed in the first connecting columns, a lower die is arranged at the bottom of the upper die, and a plurality of second connecting columns are arranged at the bottom of the lower die. A plurality of rubber pads are arranged in the lower mold, a plurality of first fixing blocks are fixedly connected to the outer walls of the rubber pads, connecting rods are rotatably connected to the interiors of the first fixing blocks, second fixing blocks are rotatably connected to the outer walls of the connecting rods, and first springs are fixedly connected between the second fixing blocks on the two sides; and clamping columns are slidably connected to the interiors of the rubber pads. According to the device, the tightness of the rubber pad to the outer wall of the first connecting column is enhanced through the rebound acting force of the first spring, meanwhile, the clamping column is used for clamping and fixing the clamping groove in the first connecting column, the stability of the device in the die pressing process is improved, and the die pressing effect of the device is enhanced.

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 invention belongs to the technical field of carbon materials, and provides a nitrogen-phosphorus-doped porous carbon modifier and a preparation method and application thereof.The preparation method comprises the steps that raw materials and water are mixed, stirred and dried, and a mixture is obtained; wherein the raw materials comprise polyaspartic acid, magnesium sulfate, polyvinylpyrrolidone and melamine phosphate in a mass ratio of (3-7): (4-6): (4-6): (3-7); the mixture is kept at 280-320 DEG C for 8-16 h, and a polymer is obtained; carbonizing the polymer in an inert gas atmosphere for 1.5-3 hours to obtain a nitrogen and phosphorus doped porous carbon modifier; wherein the carbonization temperature is 850-1000 DEG C. According to the preparation method, the nitrogen and phosphorus doped porous carbon is obtained, the porous carbon can be applied to a rubber additive and a battery negative electrode material, rubber can be effectively reinforced and the wear resistance of the rubber can be improved after the porous carbon is applied to the rubber additive, meanwhile, the preparation method is simple, complex steps are avoided, and the cost is reduced.

The invention provides a temperature-resistant anti-corrosion rubber composition for sealing an electrolytic bath, which comprises the following components in parts by weight: 20-40 parts of fluororubber, 50-80 parts of perfluoroether rubber, 7-15 parts of carbon black, 3-7 parts of sulfur, 3-8 parts of plasticizer, 4-6 parts of reinforcing fiber, 10-15 parts of reinforcing supplement, 3-10 parts of anti-aging agent, 1-7 parts of scorch retarder, 1-4 parts of anti-reversion agent and 1-4 parts of accelerant. According to the temperature-resistant and corrosion-resistant rubber composition for sealing the electrolytic cell, disclosed by the invention, the fluororubber and the perfluoroether rubber are mixed, and the carbon black and the sulfur are added for mixing, so that the corrosion resistance of the rubber is greatly enhanced, the temperature resistance is improved, and reinforcing fibers and a nano reinforcing supplement are added in the mixing process; a framework-node-rubber structure is formed in rubber after full mixing at a certain temperature, the strength of the rubber in the using process can be greatly enhanced through microscopic modification, meanwhile, the temperature resistance and corrosion resistance of the rubber are further improved, and the sealing problem in the using process of an electrolytic cell is solved.

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 utility model discloses a plate heat exchanger rubber sealing gasket with a reinforcing structure inside, which comprises a rubber gasket, and the rubber gasket comprises a lower gasket, an upper gasket, an annular groove and the reinforcing structure. The upper gasket body is glued to the lower gasket body, the annular groove is formed in the lower gasket body, the reinforcing structures are installed between the annular groove and the upper gasket body, the number of the reinforcing structures is not less than two, and the reinforcing structures are annularly distributed between the annular groove and the upper gasket body at equal intervals. In the manufacturing process, the first rubber pad and the second rubber pad are adhered to the two ends of the spring, the second rubber pad is adhered to the interior of the annular groove, the upper gasket is adhered to the lower gasket, and meanwhile, the first rubber pad is adhered to the upper gasket; the elasticity of the rubber gasket is enhanced through the elasticity of the spring, so that the two ends of the rubber gasket are in tight contact with the plate heat exchangers connected to the two sides respectively, and the connecting sealing performance of the plate heat exchangers is enhanced.

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

The utility model provides a short steel wire fiber reinforced rubber production transfer device, which belongs to the technical field of rubber production, and comprises an auxiliary mechanism, the auxiliary mechanism comprises a first stand column, the side wall of the first stand column is connected with an auxiliary roller through a bearing, and the outer side wall of the auxiliary roller is movably connected with a belt. Through the arrangement of the auxiliary mechanism, the bearing mechanism and the lifting mechanism, efficient and flexible transfer is achieved, a belt, an auxiliary roller, a rack and a fillet clamping block of the auxiliary mechanism are matched, so that a movable box can accurately move on a guide rail, and a push plate is pushed out through an air pump to push rubber blocks out; the bottom plate and the universal wheels of the bearing mechanism provide a stable moving platform, the design of a hydraulic pump and a handrail facilitates operation, pulleys, sliding grooves and a supporting frame of the lifting mechanism work cooperatively, goods can be adjusted to the proper height, the whole device can adapt to different conveying belts, and the unloading efficiency and safety can be improved.

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 low-temperature sealing rubber product and a preparation method thereof. The low-temperature sealed rubber product is prepared from the following raw materials in parts by mass: 30 to 50 parts of nitrile rubber, 10 to 30 parts of modified ethylene propylene diene monomer, 1 to 5 parts of zinc oxide, 1 to 5 parts of stearic acid, 1 to 5 parts of auxiliaries and 20 to 40 parts of carbon black, the modified ethylene propylene diene monomer is used in the rubber product, so that the crosslinking degree of the rubber product can be increased, and the sealing performance of the rubber is enhanced; by controlling the molar ratio of the three, good mechanical properties at low temperature are maintained, and the application field is widened; through synergistic use of the modified ethylene propylene diene monomer and the nitrile rubber, the sealing performance, the oil resistance and the mechanical property of the rubber product at low temperature are compounded and enhanced, and the application range of the rubber product is widened.

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.