354 results about "Raw rubber" patented technology

The invention relates to a waterproof sealing gasket material for a shield tunnel and a preparation method of the waterproof sealing gasket material. The preparation method comprises the following steps: plastifying raw rubber to obtain plastified raw rubber; the preparation method comprises the following steps: stirring and mixing plasticated raw rubber, carbon black N550, calcium carbonate, paraffin oil, zinc oxide, stearic acid, calcium oxide, an anti-aging agent and an organic magnesium compound, mixing in a mixing mill, and cooling to room temperature to obtain a mixture I; stirring and mixing the mixture I, modified NPE particles and an accelerant, mixing, and cooling to room temperature to obtain a mixture II; uniformly mixing the mixture II and sulfur in a mixing mill, vulcanizing at high temperature, and standing at room temperature for 24 hours to obtain the waterproof sealing gasket material. According to the waterproof sealing gasket material, the modified NPE particles of the core-shell structure are added, the compatibility of a water-swelling material and non-polar rubber is improved, the organic magnesium compound is added as a multifunctional auxiliary agent, the interface bonding, vulcanization network and flame retardant performance are synergistically improved, and the waterproof sealing gasket material has good waterproof performance. The prepared sealing gasket material has excellent mechanical properties, heat aging resistance, compression set resistance and flame retardance.

The invention relates to the technical field of external insulating materials for power equipment, in particular to silicone rubber, a preparation method thereof and application of the silicone rubber in a composite insulator. The silicone rubber is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl silicone rubber raw rubber, 5-20 parts of hydrophobic silicon dioxide aerogel powder, 3-15 parts of conductive and heat-conducting filler, 10-30 parts of modified aluminum hydroxide, 15-35 parts of fumed silica, 1-3 parts of a silane coupling agent and 2-5 parts of a structuring control agent, 1-4 parts by weight of a low surface energy auxiliary agent, and 0.5-2 parts by weight of a vulcanizing agent. The silicone rubber provided by the invention integrates long-acting hydrophobic anti-icing, active low-power-consumption ice melting and excellent arc ablation resistance, has long-term stability, and is especially suitable for high-voltage insulators in severe environments such as heavy ice areas and heavy dirty areas.

The invention discloses a novel insulating silicone rubber packaging material with a self-fusion characteristic, high voltage resistance and weather resistance. The material is prepared from raw methyl vinyl silicone rubber, fumed silica as a reinforcing filler, modified vinyl MQ silicone resin as a tackifier, hydroxyl silicone oil as a structure control agent, modified aluminum hydroxide and the like as raw materials, has a self-fusion characteristic, can be autonomously bonded to form a seamless insulating layer through contact pressing of two lap joint surfaces, and has the initial peel strength of 3.5 N / mm and the tensile strength of 95N / mm. The secondary fusion strength retention rate exceeds 90%; the power frequency withstand voltage under the thickness of 2mm is greater than or equal to 45kV, the power frequency withstand voltage under the thickness of 4mm reaches 66kV, and the volume resistivity is gt; and 1 * 10 < 12 > omega.m, which is improved by more than 50% compared with the traditional material. The product gives consideration to both mechanical performance and weather resistance, the thick wing-shaped sheet structure is adaptive to special-shaped equipment and can be installed in an electrified mode, and an innovative insulation protection scheme can be provided for power transmission and transformation equipment.

The invention provides methyl vinyl silicone rubber. The methyl vinyl silicone rubber is prepared from the following raw materials in parts by weight: 85 to 95 parts of methyl vinyl silicone rubber raw rubber, 27 to 35 parts of modified filler, 0.3 to 1.5 parts of vulcanizing agent, 0.5 to 1.5 parts of assistant crosslinking agent and 0.2 to 0.8 part of bulking agent, the modified filler is prepared from the following raw materials: chitosan, a filler and methacrylic acid, and the dosage ratio of the chitosan to the filler to the methacrylic acid is (25-35) g: 22g: (0.07-0.15) mol; the filler comprises hydroxyapatite and silicon dioxide. The invention also provides a preparation method of the methyl vinyl silicone rubber. The methyl vinyl silicone rubber provided by the invention has excellent tensile strength and damp-heat aging resistance.

The utility model discloses a high-strength regenerated rubber bonding force detection mechanism which comprises a supporting cabinet, two supporting plates are fixedly installed on the upper surface of the supporting cabinet, a top plate is fixedly installed on the upper surfaces of the two supporting plates together, and an electric hydraulic push rod and a warning lamp are fixedly installed on the upper surface of the top plate respectively. A through hole is formed in the upper surface of the top plate, and the output end of the electric hydraulic push rod penetrates through the through hole and extends to the position below the top plate. According to the device, the bottom face of the top plate and the upper surfaces of the two supporting plates are fixedly installed, so that the two supporting plates can jointly support the top plate, an electric hydraulic push rod is installed on the upper surface of the top plate, and a through hole is formed in the upper surface of the top plate, so that the output end of the electric hydraulic push rod can freely stretch out and draw back; the electric hydraulic push rod is electrically connected with the controller through the wire, so that a worker can conveniently control the electric hydraulic push rod through the controller, and the bonding plate can ascend at a constant speed.

The application relates to the technical field of rubber sealing materials, and discloses a high and low temperature resistant fluororubber sealing element and a preparation method thereof. The high and low temperature resistant fluororubber sealing element is prepared from fluororubber raw rubber, reinforcing fillers, inorganic fillers, acid absorbents, processing aids and vulcanizing agents, wherein the acid absorbents are prepared from metal hydroxides and metal oxides in a mass ratio of (2-5):(1-3), and the processing aids are prepared from amide flow aids, polyethylene wax and fatty acid metal salts in a mass ratio of (1-2.5):(0.8-2):(0.5-1). The prepared high and low temperature resistant fluororubber sealing element has excellent mechanical properties, high temperature resistance, low temperature resistance and compression permanent deformation performance, and effectively solves the technical problems of easy aging of existing fluororubber sealing elements at high temperatures, large compression permanent deformation and easy brittle cracking at low temperatures. The preparation method adopts a mixing and vulcanization process, the preparation method is simple, and the method is suitable for large-scale production.

The present invention provides a seaweed fertilizer material that allows for easy and inexpensive fertilization and supplemental fertilization of seaweed, as well as enabling the strengthening and reuse of cultivation ropes, a seaweed cultivation facility equipped with this material, a method for manufacturing the seaweed fertilizer material, and a method for cultivating seaweed. [Solution] The seaweed fertilizer material 1 according to the present invention is a seaweed fertilizer material 1 for fertilizing seaweed, and contains raw rubber and shell powder obtained by grinding the shells of marine organisms into powder, and is formed in the form of a sheet or string. The shell powder may be powder from sea urchin shells, and may further contain iron fulvic acid.

The application provides a high-styrene solution polymerized styrene-butadiene rubber and a preparation method and application thereof, and the preparation method comprises the following steps: mixing styrene, butadiene, an initiator, a structure regulator and a non-polar solvent, and performing a polymerization reaction to obtain solution polymerized styrene-butadiene rubber; wherein the structure regulator comprises at least two of t-butoxy sodium, t-amyl oxy sodium, 2,3-dimethyl-3-pentanol sodium and ethylene glycol disodium, and a crown ether. By using the composite structure regulator, the application can prepare a random high-styrene content solution polymerized styrene-butadiene rubber, and the rubber almost does not contain styrene blocks, and the content of vinyl in the rubber can be adjusted by the addition amount of the structure regulator. Therefore, the solution polymerized styrene-butadiene rubber prepared by the application has good strength and hardness due to the high styrene content, and the random microstructure reduces the glass transition temperature and heat build-up of the raw rubber, and is suitable for the manufacturing of high-performance tires such as new energy vehicle tires.

The utility model relates to the technical field of waste rubber regeneration, in particular to a mixing device for devulcanizing and plasticizing waste rubber, which comprises a mixing barrel, a crushing and stirring component rotatably arranged in the mixing barrel, a driving component vertically and slidably arranged on the mixing barrel, and a lifting component arranged on the mixing barrel and positioned below the driving component, the driving assembly is in transmission connection with the crushing and stirring assembly, the driving assembly drives the crushing and stirring assembly to rotate, the lifting assembly is connected with the driving assembly, and the lifting assembly drives the driving assembly to vertically slide; the motor drives the transmission shaft to rotate so as to drive the crushing cutter arranged at the upper part of the filter screen to crush the waste rubber raw material again, so that the situation that some waste rubber fragments which are not crushed thoroughly influence and reduce the quality and performance stability of regenerated rubber is prevented; an electric push rod is started to drive a moving plate to move upwards, and then a transmission shaft connected through a synchronous rod is driven to move upwards, so that the filter screen is moved to the outside of the mixing barrel, and a worker can conveniently clean the filter screen.

The invention discloses hydrogenated butadiene-acrylonitrile rubber which is composed of hydrogenated butadiene-acrylonitrile rubber raw rubber, a reinforcing filling system, a protection system, a vulcanization system, a processing aid and a key oil-resistant synergistic enhancement system, and the oil-resistant synergistic enhancement system is formed by compounding fluorine polymer powder and organic montmorillonite. The hydrogenated butadiene-acrylonitrile rubber has the advantages that the hydrogenated butadiene-acrylonitrile rubber has excellent high-temperature aging resistance and balanced physical and mechanical properties, and the resistance of the hydrogenated butadiene-acrylonitrile rubber to various insulating oils such as mineral oil, natural ester and synthetic ester is greatly improved through the synergistic effect of physical obstruction and extension of diffusion paths of the nanosheet layers; the method is especially suitable for rubber products which are required to work stably for a long time in a complex insulating oil medium environment.

The invention discloses low-temperature oil-resistant hydrogenated butadiene-acrylonitrile rubber as well as a preparation method and application thereof, and the rubber is prepared from the following raw materials in parts by weight: 100 parts of hydrogenated butadiene-acrylonitrile rubber, 8-20 parts of a polyether plasticizer, 50-65 parts of carbon black, 5-8 parts of modified nano SiO2, 2-4 parts of an anti-aging agent, 5.8-6.5 parts of a peroxide vulcanizing agent and 2-2.8 parts of a vulcanizing aid. The acrylonitrile content in the hydrogenated butadiene-acrylonitrile rubber is greater than or equal to 37%, and the residual double bond content is not greater than 4.5; through the design of the content of acrylonitrile and double bonds in raw rubber, a low-temperature-resistant plasticizer TP-90B is used as a softener to regulate the rigidity of a main chain structure of the raw rubber with high acrylonitrile content and improve the low-temperature performance, and is matched with modified nano SiO2 to form an organic-inorganic interpenetrating network, so that excellent permeation resistance and diffusivity of vulcanized rubber are ensured, and the oil pressure change resistance is improved; and finally, a peroxide vulcanization system in which a vulcanization aid participates is matched to form a complete cross-linked structure, so that oil resistance and low temperature resistance are realized, excellent medium compatibility with low-viscosity synthetic oil is ensured, good compression set at a low temperature of-40 DEG C is ensured, and a rubber material with long-term heat aging resistance is stable.

The present application relates to a kind of low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering and its preparation method, belong to damping rubber modification technical field.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application is prepared by high-vinyl polybutadiene rubber, butyl rubber, flocculation butyl nitrile rubber / oxidized carbon nanotube composite raw rubber and auxiliary mixing co-vulcanization.The vinyl content of high-vinyl polybutadiene rubber is 83-85%, Mn is 430-470, and the relative molecular mass distribution index is 2.0-2.5.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application has a wider damping temperature range, excellent low-temperature damping performance, mechanical properties and oil resistance;Meanwhile, a simple and convenient preparation method is provided.

Provided is a millable silicone rubber compound excellent in cold resistance, which can maintain rubber elasticity in an ultra-low temperature range without using various conventional techniques for improving cold resistance. 【Solution means】A millable silicone rubber compound containing the following components (A) to (E). (A) The following formula (1) M n M Vi (2-n) D γ D Vi δ (1) M:R 1 3SiO (1 / 2) M Vi :R 1 2RSiO (1 / 2) D:R 1 2SiO (2 / 2) D Vi :R 1 RSiO (2 / 2) (In the formula, R is independently an alkenyl group, R 1 is independently an unsubstituted or substituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond. n is a positive number from 0 to 2. γ satisfies (γ / (γ + δ)) ≤ 0.98, δ satisfies (δ / (γ + δ)) ≥ 0.02, and (γ + δ) is a positive number such that (γ + δ) ≥ 6000.) raw rubber represented by (B) A compound having one hydrogen atom bonded to a silicon atom, (C) A specific dispersant, (D) Reinforcing silica having a specific specific surface area, (E) An addition reaction catalyst

The invention relates to the technical field of polymer foam materials, in particular to a rubber-based composite foam material for a middle layer of a shoe sole and a preparation method of the rubber-based composite foam material for the middle layer of the shoe sole. Adding a foaming agent, sulfur, an accelerant N-cyclohexyl-2-benzothiazole sulfenamide and tetrabenzylthiuram disulfide, and carrying out secondary internal mixing to obtain a uniformly mixed styrene butadiene rubber / natural rubber-based rubber compound; putting the rubber compound into an open mill, and discharging bubbles; and finally, carrying out high-temperature curing foaming on the rolled rubber compound by using a plate vulcanizer. The rubber-based composite foam material obtained by the invention has the characteristics of simple process, light weight, uniform foam holes, high elasticity and high tensile strength, and is suitable for middle-layer materials of soles.

The present application relates to the technical field of perfluorinated rubber composition, and particularly relates to a perfluorinated rubber composition, a preparation method thereof and an article. The perfluorinated rubber composition is prepared from the following raw materials in parts by weight: 100 parts of cyan perfluorinated rubber raw rubber, 0.7-8.6 parts of vulcanizing agent, and 0-20 parts of reinforcing filler; the vulcanizing agent comprises nano silicon nitride and nitrogen-containing organic amine compound; the nano silicon nitride is non-beta crystalline nano silicon nitride. The present application can improve the yield of perfluorinated rubber composition articles, and improve the high-temperature compression of the perfluorinated rubber composition articles. The present application can improve the tensile strength of perfluorinated rubber composition articles, and reduce the permanent compression deformation rate and resilience of perfluorinated rubber composition articles at 204 DEG C.

The utility model belongs to the technical field of reaction kettle, especially a regeneration rubber lamp TPE composite's banburying reaction kettle, including kettle body, the sealing cover that kettle body top end connects, the support that the middle part of sealing cover top is fixed and set up, and the transmission mechanism that sealing cover inboard is provided, the bottom side of sealing cover is connected with the linkage lever, and the outer ring surface of transmission mechanism is equipped with the mounting sleeve, the lock hole is opened to the outer surface of mounting sleeve, the surface center point of one end of mounting sleeve is rotatably connected with the ratchet wheel, and the other end of ratchet wheel is connected with the stirring vane, the utility model discloses the mounting sleeve, the lock hole, the lock rod, the ratchet wheel and the stirring vane etc. Structure that sets up, can be convenient subsequent according to actual use demand to adjust the inclination angle of stirring vane, and because multiple stirring vanes are all respectively through the ratchet wheel and mounting sleeve between constitute rotatable connection, so can carry out the individual adjustment of multiple stirring vanes respectively, the whole has higher practicality and flexibility, and can effectively break the high filling system reunion phenomenon.

This invention relates to a cut-resistant, low-heat-generating all-steel radial engineering tire tread compound formulation and its preparation method, comprising: 70-80 parts natural rubber, 30-50 parts styrene-butadiene rubber, 20-40 parts carbon black, 10-15 parts silica, 2-3 parts silane coupling agent, 2-3 parts stearic acid, 3-4.5 parts zinc oxide, 3-5 parts antioxidant system, 1-2 parts dispersant, 1-4 parts sulfur, 1-4 parts accelerator, and 0.1-0.4 parts scorching inhibitor; the raw rubber of this invention... The system primarily uses natural rubber, which is high in strength and low in heat generation. It also incorporates solution-polymerized styrene-butadiene rubber (SBR) to overcome the high heat generation disadvantage of traditional emulsion-polymerized SBR. Furthermore, it utilizes a wet mixing technique involving carbon nanotubes and nano-carbon black in solution-polymerized SBR to resolve dispersion issues related to reinforcing fillers and carbon nanotubes. This results in a high proportion of binder, high strength, low heat generation, and outstanding abrasion resistance. Simultaneously, it also gives the formulation excellent cut and puncture resistance, effectively overcoming the issues of prominent shoulder and crown aortic ...

The invention relates to the field of rubber materials, in particular to a rubber compound for a lightweight EPDM (Ethylene-Propylene-Diene Monomer) sealing strip and a preparation process of the rubber compound. The rubber compound for the light-weight EPDM sealing strip at least comprises the following raw materials in parts by mass: 90-130 parts of EPDM raw rubber, 15-25 parts of a rubber composition, 40-60 parts of reinforcing filler, 25-35 parts of a softening plasticizer, 1.5-4.5 parts of a cross-linking agent and 3-6 parts of a foaming agent. The finally prepared rubber compound for the light-weight EPDM sealing strip can maintain excellent physical and mechanical properties and processing stability, has good material corrosion resistance, water resistance, moisture resistance and other properties, still has good comprehensive properties such as elasticity and aging resistance on the premise of maintaining light weight, and is suitable for popularization and application. Therefore, the ever-increasing requirements of modern industry on high-performance sealing materials are met.

The application discloses a kind of low-temperature fluorine rubber materials resistant to pure carbon dioxide and anti-blast and a preparation method thereof.The material is made of the following raw materials: low-temperature fluorine rubber raw rubber 100 parts, vulcanizing agent 2-4 parts, auxiliary crosslinking agent 3-8 parts, release agent 1-2 parts, composite anti-gas blast reinforcing agent 2-5 parts, reinforcing agent 3-5 parts, reinforcing filler 30-40 parts.The application builds a multi-scale barrier network in the rubber matrix through the synergistic effect of graphene oxide, nano zinc oxide and single-walled carbon nanotubes, significantly improving the CO2 resistance and anti-blast performance.After testing, the volume change rate of the material in a pure CO2 environment at 150°C and 38MPa is only 8.2%, there is no blister, the tensile strength reaches 21.5MPa, and the comprehensive performance is excellent, suitable for sealing components under extreme working conditions such as CCUS projects.

The application relates to the technical field of mixing rubber, and particularly discloses an EPDM air conditioner pipe material mixing rubber for new energy vehicles and a preparation method thereof. The mixing rubber disclosed by the application comprises the following components: 75-125 parts of EPDM raw rubber, 100-140 parts of a reinforcing agent, 50-60 parts of paraffin oil, 10-30 parts of modified kaolin, 4-6 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-1.5 parts of an antioxidant, 0.2-0.4 parts of sulfur and 5-6 parts of a crosslinking aid; the reinforcing agent is composed of fast-pressing out furnace black N550 and semi-reinforcing furnace black N774; and the modified kaolin is obtained by modifying a mixture of kaolin and sodium lignosulfonate with a titanate coupling agent. Through formula optimization and adjustment, the mixing rubber prepared by the application has improved low-temperature shrinkage performance under the premise of meeting the high-temperature aging resistance requirement, and can meet the high-temperature and low-temperature requirements simultaneously.

Processes and systems are provided for treating the tail gas stream of a sulfur recovery plant. The process comprising the steps of treating the compressed tail gas stream in a pre-treatment unit to remove the impurities; separating the dry stream in a first stage membrane unit, the first stage membrane unit comprises a membrane selective to carbon dioxide and hydrogen; reducing a temperature of the cryogenic feed in a cryogenic cooler to produce a cryogenic stream; separating the cryogenic feed in a knock-drum to produce a liquid carbon dioxide and membrane feed; separating the membrane feed in a second stage membrane unit to produce a rubbery membrane permeate and a rubbery membrane retentate, where the second stage membrane unit comprises a membrane selective to carbon dioxide over hydrogen; and treating the rubbery membrane retentate in a hydrogen recovery process to produce a hydrogen product stream and a carbon dioxide lean stream.

The invention provides a flame-retardant and high-pressure-resistant insulating rubber material for a connector and a preparation method thereof, and relates to the technical field of rubber materials, the flame-retardant and high-pressure-resistant insulating rubber material is prepared by mixing and vulcanizing raw materials comprising the following components: raw rubber, an active agent, an antioxidant, an anti-scorching acid acceptor, a surfactant, a processing aid, a flame retardant, a reinforcing agent, a vulcanizing agent and a vulcanization accelerator; the method comprises the following steps: S2, plastifying: plastifying raw rubber on an open mill until the raw rubber is softened and the surface is smooth, and then covering a roller; s3, preliminary mixing: adding an active agent, an antioxidant, an anti-scorching acid-absorbing agent and a processing aid, and uniformly mixing; s4, final mixing and batch-off: adding the surfactant, the flame retardant, the color master batch and the reinforcing agent, and uniformly mixing; according to the invention, the comprehensive performance of high elasticity, V-0-level flame retardance, high insulation, aging resistance, antistatic property and good sealing performance is essentially realized through the formula design material; and the theoretical performance is ensured to be stable and reliably reflected in a final product through an optimized preparation process.

The application relates to the technical field of rubber material production, in particular to an EPDM rubber material with self-adhesion after vulcanization and a preparation method thereof. The EPDM rubber material comprises the following components in mass fractions: 70-90 parts of EPDM raw rubber, 3-7 parts of modified resin, 2-9 parts of tackifying resin, 10-25 parts of porous nanometer carbon balls, 6-15 parts of polyester plasticizer, 3-6 parts of nanometer zinc oxide, 1-4 parts of stearic acid, 0.5-2 parts of anti-aging agent, 0.5-2 parts of accelerator and 0.5-3 parts of vulcanizing agent. The EPDM material has the characteristics of strong self-adhesion, no oil separation, high mechanical property and good heat-resistant stability. The modified resin is introduced into the EPDM raw rubber to crosslink with the EPDM raw rubber, the tackifying resin and the polyester plasticizer are used, the mechanical property, heat resistance and self-adhesion of the material are effectively improved, and the porous nanometer carbon balls are introduced to effectively improve the oil separation of the EPDM rubber material.

The invention discloses an environment-friendly rubber composition and a production method thereof, and belongs to the technical field of synthetic rubber. The rubber composition provided by the invention comprises the following components in parts by weight: 150200 parts of modified raw rubber; 50-60 parts of white carbon black; 110 to 130 parts of pottery clay; 31-43 parts of a softening agent; 5-8 parts of zinc oxide; 1-2 parts of stearic acid; 1-3 parts of polyethylene glycol; 2-5 parts of a silane coupling agent; the modified raw rubber is prepared by carrying out high-temperature reaction on raw rubber, a modifier and an organic solvent in the presence of inert gas. According to the environment-friendly rubber composition produced by the invention, the temperature resistance and the strength of the rubber can be enhanced by modifying the rubber, and the white carbon black and the argil are used for synergistic reinforcement, so that the strength and the cost are both considered, and the cost is controllable; a large amount of argil is used as a low-cost extender in the components, so that the economical efficiency is higher.

The utility model discloses normal-pressure continuous rubber regeneration equipment which comprises a bottom plate, a feeding pipe is installed on the bottom plate, a discharging pipe is installed on the feeding pipe, a discharging roller is rotatably installed in the discharging pipe, a discharging groove is installed on the discharging pipe, a control mechanism is arranged on the discharging groove and comprises two sliding grooves, and the two sliding grooves are communicated with each other. Two sliding grooves are formed in the inner wall of the discharging groove, baffles are installed on the inner walls of the two sliding grooves in a sliding mode, and the two baffles are installed in the discharging groove in a sliding mode. Through arrangement of the sliding grooves, the baffles, the toothed plate, the gear, the servo motor and other structures, the toothed plate is driven by the servo motor to move in the using process; the toothed plate drives the baffles in the discharging groove to move, so that the falling speed of regenerated rubber in the discharging groove can be conveniently adjusted through movement of the baffles on the two sides, and the situation that rubber is directly placed in the discharging groove traditionally, and blockage is likely to happen is avoided.

The invention relates to the technical field of high polymer materials, and discloses a regenerated rubber composite material with high mechanical property and a preparation method thereof. The regenerated rubber composite material is prepared by mixing the following raw materials in parts by weight: 100 parts of regenerated rubber and 0.3-1.5 parts of a titanate coupling agent, the titanate coupling agent is a chelating type titanate coupling agent and / or a mono-alkoxy type titanate coupling agent, and the titanate coupling agent contains a pyrophosphate acyloxy group. By adding the titanate coupling agent, the tensile product resistance and tear resistance of the regenerated rubber can be improved at the same time. And the process is simple, no complex equipment is needed, and the tensile product resistance and tear resistance can be improved through the titanate coupling agent no matter in preparation or finished regenerated rubber.

The invention relates to the technical field of wear-resistant molded part materials, and particularly discloses an NR wear-resistant molded part material for a poultry depilator and a preparation method and application of the NR wear-resistant molded part material. The NR wear-resistant molded part material provided by the invention comprises the following components: 100 parts of raw rubber, 40-60 parts of composite filler, 5-15 parts of naphthenic oil, 4-7 parts of zinc oxide, 0.5-1 part of stearic acid, 3-9 parts of an anti-aging agent, 1-3 parts of sulfur and 1-3 parts of an accelerant, the raw rubber is formed by mixing 60-80 parts of NR natural rubber and SBR 1502 raw rubber in a weight ratio of (3-4): (1-2); the composite filler is prepared from high-wear-resistance furnace black N330 mechanically activated by silane, polyisobutene and naphthenic oil in a weight ratio of 100: (1-3): (3-10). The NR wear-resistant molded part material prepared by the invention has relatively high tensile strength, and the impact resistance and wear resistance of the material are excellent.

This utility model discloses a pressing and extrusion device for the production of recycled rubber, including a pressing device body, a feeding hood on the top of the pressing device body, and a connecting column fixedly installed on the inner wall of the feeding hood; and a scraper disposed on the bottom surface of the connecting column. In the above solution, the scraper disposed at the bottom of the connecting column is in contact with the rotating roller, so that the rubber material attached to the surface of the roller can be scraped off. During the scraping process, the motor drives the connecting shaft to rotate, so that the abutment column mounted on the surface of the connecting shaft can rotate synchronously and contact the buffer pad on the top surface of the push plate during continuous rotation, thereby pushing the push plate down to push the material down again. This achieves immediate treatment of the adhesive material attached to the roller surface, avoiding the adhesive material from affecting subsequent calendering, thereby improving the practicality of the device.

The application relates to the technical field of high polymer composite materials, in particular to a high-strength wear-resistant recycled rubber composite material and a preparation method thereof. The application discloses a high-strength wear-resistant recycled rubber composite material and a preparation method thereof, the composite material takes deeply activated waste rubber powder as a reinforcing core, and is coated with an oriented graphene / liquid crystal epoxy reinforcing shell layer on the surface; a microcapsule is used to release mercapto silane, and the mercapto silane is coupled with a high-frequency vibration regenerated free radical to construct a dynamic disulfide bond interface bonding layer. The preparation method integrates deep eutectic-microwave activation, extrusion flow field orientation and interface precise construction process. The application has the advantages of high strength, high wear resistance and self-repairing capacity, and realizes high-value conversion of waste rubber.

This invention provides a polyurethane raw rubber, a compounded polyurethane, and a polyurethane compounded molded article. The raw materials for preparing the polyurethane raw rubber include a polyester polyol and a polyisocyanate. The polyester polyol is selected from polyester polyols without side chains, and the polyisocyanate is selected from aliphatic symmetrical polyisocyanates. This invention, through the design of the raw materials for preparing the polyurethane raw rubber, obtains a high-performance polyurethane raw rubber using polyester polyols without side chains and aliphatic symmetrical polyisocyanates. Furthermore, it prepares a compounded polyurethane that, while maintaining transparency and resistance to yellowing (A method ≥ 4, B method ≥ 4), has a tear strength ≥ 75 kN / m at a hardness of 65–70 A.