291 results about "EPDM rubber" patented technology

The invention relates to the technical field of thermoplastic vulcanizates, and discloses a TPV sealing material and a preparation method thereof. The TPV sealing material is prepared from the following raw materials in parts by weight: 10 to 30 parts of PP resin, 40 to 60 parts of EPDM rubber, 10 to 20 parts of polylactic acid, 15 to 25 parts of filler, 0.5 to 1.5 parts of vulcanizing agent, 0.3 to 1.5 parts of vulcanization accelerator, 5 to 10 parts of compatilizer, 1 to 4 parts of modified heat stabilizer and 0.5 to 3 parts of modified anti-aging agent. Through preparation of the modified heat stabilizer, structural damage or sealing failure caused by thermal aging of a system can be reduced, and the service life of the sealing material is greatly prolonged; the preparation of the modified anti-aging agent can effectively resist the corrosion of environmental factors such as thermal oxidation and ozone to the system, and prevent the problems of cracking, hardening, elasticity attenuation, sealing failure and the like of the sealing material after long-term use.

The invention relates to the technical field of rubber compounds, and particularly discloses a bio-based and circulating material synergistically modified EPDM rubber compound and a preparation method thereof. The invention discloses a bio-based and circulating material synergistically modified EPDM rubber compound. The rubber compound is prepared from the following components: 100 parts of bio-based EPDM rubber, 100 to 130 parts of a reinforcing agent, 40 to 60 parts of paraffin oil, 5 to 7 parts of magnesium oxide, 0.5 to 1.5 parts of stearic acid, 6 to 8 parts of BIPB-40 peroxide, 2 to 5 parts of a Si-69 silane coupling agent, 1 to 3 parts of a dispersing agent and 1 to 3 parts of an assistant crosslinking agent, the reinforcing agent is composed of fast extruding furnace black N550, rice hull ash white carbon black and thermal cracking carbon black; and the assistant cross-linking agent is prepared from diallyl terephthalate and triallyl isocyanurate. The rubber compound prepared by utilizing the technical scheme provided by the invention can meet and maintain the mechanical property requirements, and meanwhile, carbon emission of the product in the whole life cycle is reduced from the aspects of formula and process.

The invention relates to the technical field of sealing strips, in particular to an anti-aging ethylene propylene diene monomer rubber sealing strip and a preparation method thereof. Comprising the following components in parts by weight: 150-180 parts of ethylene propylene diene monomer, 60-90 parts of carbon black, 8-12 parts of white carbon black, 3-8 parts of a peroxide vulcanizing agent, 6-12 parts of zinc oxide, 12-16 parts of magnesium-aluminum hydrotalcite, 10-18 parts of a plasticizer, 1-3 parts of a crosslinking aid, 1-3 parts of calcium stearate, 1-3 parts of an anti-aging agent and 1-3 parts of a silane coupling agent. The anti-aging agent is a mixture of an anti-aging agent AN245 and an anti-aging agent MBZ. By adding the anti-aging agent, the aging resistance of the ethylene propylene diene monomer can be remarkably improved by inhibiting oxidation and delaying the aging process, a high-crosslinking-density three-dimensional network is formed through the peroxide vulcanizing agent, breakage of molecular chains at high temperature is reduced, thermal aging is delayed, and the ethylene propylene diene monomer sealing strip with excellent aging resistance is prepared.

The invention discloses a corrosion-resistant protective sleeve for an aluminum alloy cable and a preparation method of the corrosion-resistant protective sleeve, and belongs to the field of cable protective sleeves. The corrosion-resistant protective sleeve for the aluminum alloy cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of ethylene propylene diene monomer, 15 to 25 parts of fluorinated silicone rubber, 5 to 10 parts of modified thiolated ethylene-vinyl alcohol copolymer, 8 to 15 parts of metal fluoride nanocrystal, 4 to 8 parts of vulcanizing agent, 3 to 8 parts of plasticizer and 3 to 5 parts of flame retardant. The two rubber matrixes are compounded to form a physical barrier layer to prevent corrosion media and water molecules from permeating, material pores can be filled with the metal fluoride nanocrystals, diffusion channels of the corrosion media are reduced, and hydrophobicity and corrosion resistance are improved through cooperation of the metal fluoride nanocrystals and the fluorinated silicone rubber. The modified thiolated ethylene-vinyl alcohol copolymer can improve the compatibility between rubber matrixes and form coordination with metal ions of the metal fluoride nanocrystals, so that the diffusion path of a corrosive medium is prolonged, and the corrosion of the corrosive medium is synergistically blocked.

The invention discloses a corrosion-resistant anti-cracking cable sheath material and a preparation method thereof, and belongs to the technical field of cable materials. The sheath material is prepared by adopting ethylene-vinyl acetate rubber and ethylene-propylene-diene monomer rubber as matrixes, adding graphene modified conductive carbon black and self-repairing microcapsules in a specific proportion, and carrying out banburying premixing, open milling feeding, dynamic vulcanization and other multi-step processes. Graphene and carbon black form a stable conductive network according to a specific ratio under the action of a silane coupling agent, urea resin is taken as a wall material of the self-repairing microcapsule, epoxy resin and a curing agent in a core material are in a specific ratio, and the repairing efficiency is ensured. The tensile strength retention rate of the material is greater than or equal to 92% and the elongation at break retention rate is greater than or equal to 88% after the material is aged for 1500 hours in a salt mist environment, the strength recovery rate of microcracks reaches 85% or above after the microcracks are subjected to heat treatment at 70 DEG C for 2 hours, and the material has excellent corrosion resistance, cracking resistance, self-repairing function and static dissipation capacity and is particularly suitable for cable protection in severe environments such as marine transportation and chemical engineering.

The invention belongs to the technical field of rubber sealing rings, and particularly discloses a wading rubber sealing ring and a preparation method thereof, the wading rubber sealing ring comprises the following components by weight: 60-70 parts of modified ethylene propylene diene monomer, 35-50 parts of modified white carbon black, 20-30 parts of hydrogenated nitrile rubber, 0-10 parts of fluororubber, 2-5 parts of polyester fiber, 0.5-3 parts of an anti-hydrolysis agent, and 1-3 parts of a hydrophobic agent. 2-4 parts of an antimicrobial agent, 3-5 parts of an anti-aging agent and 1-7 parts of sulfur; the anti-hydrolysis agent is a mixture of tetrakis [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and a carbodiimide anti-hydrolysis agent; the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane, and the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane. The wading rubber sealing rubber ring and the preparation method thereof are suitable for fresh water and warm water scenes, and have wide application prospects in ship sealing and sewage treatment equipment in seawater and industrial wastewater scenes.

The invention relates to the field of sheath materials, and discloses an anti-aging sheath material for an electronic wire and a preparation method thereof, the sheath material comprises low density polyethylene, an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, ethylene propylene diene monomer, a triazine ring derivative, ammonium polyphosphate, modified nano silicon dioxide and an auxiliary agent; according to the triazine ring derivative, N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine reacts with cyanuric chloride to prepare a triazine ring monosubstituent, hydrazine hydrochloride is used as a bridging agent to react with the triazine ring monosubstituent, and the triazine ring derivative and piperazine are polymerized to prepare the triazine ring derivative. The modified nano silicon dioxide is prepared by enabling 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 4-propenyloxy-2-hydroxybenzophenone to react, and carrying out free radical polymerization on the reaction product on the surface of the nano silicon dioxide. The synergistic effect of mechanical property, thermo-oxidative aging resistance, ultraviolet aging resistance and flame retardant property is realized.

The invention discloses a light-weight and flame-retardant braided hose for a liquid cooling system and a preparation method of the light-weight and flame-retardant braided hose. The invention discloses a sizing material for preparing a braided hose for a liquid cooling system. The sizing material is prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 5 parts of zinc oxide, 1 part of stearic acid, 30-60 parts of carbon black, 30-50 parts of nano calcium carbonate, 15-25 parts of a plasticizer, 2-4 parts of a cross-linking agent and 1-3 parts of an assistant cross-linking agent. The invention discloses a light-weight and flame-retardant braided hose for a liquid cooling system. The braided hose sequentially comprises an inner rubber layer and a reinforcing layer from inside to outside, the rubber material of the inner rubber layer is used for preparing the braided hose for the liquid cooling system; and the reinforcing layer is formed by weaving flame-retardant polyester fibers. The braided hose disclosed by the invention has the advantages of excellent flame retardance and medium compatibility resistance, flexibility, easiness in bending, light weight and the like, has good compatibility with an ethylene glycol aqueous solution, is suitable for a liquid cooling system, and can ensure long-term, safe and reliable operation of the liquid cooling system.

The invention relates to the technical field of high polymer material and automobile part manufacturing, and discloses a high-durability high-low temperature resistant automobile composite sealing strip, which is prepared from the following raw materials: ethylene propylene diene monomer, polyisoprene grafted maleic anhydride, pre-dispersed master batch, carbon black and a vulcanization system. The pre-dispersed master batch takes oxidized polyethlene wax as a carrier to wrap zinc oxide and D-mannitol. The phase change characteristic of the carrier is utilized, active components are isolated in the mixing and extruding stage, and scorching is prevented; the components are released in the high-temperature vulcanization stage to initiate anhydride ring opening, and a double cross-linked network with coexistence of covalent bonds and ionic bonds is constructed. According to the sealing strip, the macromolecular reactive plasticizer is used for replacing part of liquid paraffin, the atomization problem caused by micromolecule migration is solved, the high-temperature compression permanent deformation rate is remarkably reduced through a thermal reversible mechanism of an ion cluster, and excellent low-temperature rebound resilience and processing safety are both considered.

The application provides a low-cost, low-odor, low-VOC-emission and excellent-mechanical-property EPDM (Ethylene Propylene Diene Rubber) foaming material and a preparation method thereof, and belongs to the technical field of high polymer materials. The application realizes slow release control by adopting a PVA / SiO2 composite coated citric acid-sodium bicarbonate foaming agent, and is synergistically compounded with odorless organic foaming agent 4,4'-oxobisbenzenesulfonylhydrazide (OBSH), so as to optimize the cell structure through a binary foaming system (CO2+N2). The foaming agent applied in the EPDM foam material can significantly improve the mechanical property of the EPDM foaming material, effectively reduces the VOC emission, has good environmental protection and stability, and is suitable for automobile, rail transit and other fields, and has a wide application prospect.

This invention discloses a EPDM rubber and its preparation method, comprising copolymerizing the EPDM rubber from a first structural unit provided by ethylene, a second structural unit provided by propylene, and a third structural unit provided by a polyene monomer. This invention achieves precise control of the molecular structure of the EPDM rubber by introducing a polyene monomer with a specific structure as the third monomer, and combining it with a restricted geometry catalyst or a vanadium-based catalyst, thereby improving the uniformity of the copolymer and the vulcanization efficiency. The resulting rubber exhibits a narrow molecular weight distribution, suitable Mooney viscosity, and good processing properties, making it suitable for high-performance rubber products. The preparation method is simple, environmentally friendly, and easy to industrialize.

This utility model relates to the field of wiring harness rubber sleeve technology, and more particularly to a rubber sleeve for automotive door wiring harnesses. It includes a main body mechanism for improving structural strength, on which a connecting mechanism for stable connection with the vehicle door body is provided. The main body mechanism includes a telescopic sleeve, with connecting tubes fixedly connected to both ends of the telescopic sleeve. Multiple annular iron plates are installed inside the telescopic sleeve, and circular plates are fixedly connected to each of the annular iron plates. This utility model significantly improves the overall structural strength of the device by setting up the main body mechanism. By using EPDM rubber and adding 5 phr microencapsulated antioxidants, the wear resistance of the telescopic sleeve and connecting tubes is improved, effectively resisting fatigue cracks caused by repeated bending. The multiple annular iron plates enhance mechanical support, disperse frictional stress, prevent accelerated wear and cracking of the vehicle body sheet metal, and improve the service life of the device.

The invention relates to the technical field of rubber, and provides an insulating flame-retardant rubber tube for an automobile temperature control system and a preparation method of the insulating flame-retardant rubber tube. The insulating flame-retardant rubber tube for the automobile temperature control system sequentially comprises an inner contact layer, a reinforcing layer and an outer protective layer from inside to outside, the inner contact layer and the outer protective layer are consistent in formula and comprise nitrile rubber, ethylene propylene diene monomer, modified magnesium hydroxide, dioctyl phthalate, zinc oxide, an anti-aging agent, a vulcanizing agent and a processing aid; the reinforcing layer comprises chlorosulfonated polyethylene rubber, modified magnesium hydroxide, boron nitride phosphonitrile, antimony trioxide, diisononyl phthalate, an anti-aging agent, a vulcanizing agent, zinc oxide and a processing aid. According to the insulating flame-retardant rubber tube for the automobile temperature control system, the flame retardance is improved, and the problem that the insulating property is reduced in the long-term use process is solved.

To improve driving stability and comfort by suppressing resonance that occurs when a vehicle equipped with a torsion beam rear suspension travels at medium to high speeds and improving roll behavior and tension. [Solution] A 3mm thick, 300mm long, and 30mm wide EPDM rubber vibration damping material is attached to a recess formed on the underside of the torsion beam using strong double-sided tape, effectively damping resonance.

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

The invention relates to the technical field of high polymer materials, and discloses a high and low temperature resistant EPDM (Ethylene-Propylene-Diene Monomer) rubber material as well as a preparation method and application thereof, and the high and low temperature resistant EPDM rubber material comprises the following components in parts by mass: 44.4-64.9 parts of ethylene propylene diene monomer; 6.7 to 26.0 parts of vinyl-terminated polydimethylsiloxane; 13.3 to 39.0 parts of gas phase method nano silicon dioxide; 0.9 to 3.9 parts of a flexible long-chain molecular bridge coupling agent; 0.4 to 3.2 parts of an ionic network construction auxiliary agent; 1.8 to 5.2 parts of a peroxide vulcanizing agent; 0.4 to 1.9 parts of an assistant cross-linking agent; and 0.4 to 1.9 parts of an antioxidant. By constructing a triple interpenetrating network and a flexible interface and adopting a step-by-step construction process, the low-temperature flexibility, high-temperature stability and mechanical strength of the material are synergistically improved, meanwhile, excellent processing safety is ensured, and the bottleneck that comprehensive performance is difficult to consider in the prior art is solved.

The utility model relates to the technical field of PVC (polyvinyl chloride) drainage pipes, and discloses a PVC drainage pipe with a protective structure, which comprises an outer pipe sleeve, EPDM (ethylene-propylene-diene monomer) rubber is arranged in the outer pipe sleeve, a metal net is mounted in the EPDM rubber, the outer surface of the metal net is coated with an epoxy coal pitch coating, the inner wall of the outer pipe sleeve is connected with a support block, and the inner wall of the outer pipe sleeve is connected with a protective layer. An inner water pipe is connected into the supporting block, an inner guide groove is formed in the inner wall of the inner water pipe, and a guide mark is arranged outside the outer pipe sleeve. According to the utility model, the outer pressure-resistant protective structure is arranged, the main body of the outer pipe sleeve is made of the EPDM rubber when in use, the EPDM rubber has heat-resistant and anti-aging functions, the metal net is filled in the EPDM rubber to increase the impact resistance of the EPDM rubber, and the epoxy coal pitch coating is coated outside the outer pipe sleeve.

The utility model discloses a kind of briquettes suitable for anti-accumulation of dust assembly, including briquette body, laminated part and frame, the briquette body includes two kinds of middle pressure and side pressure, the middle part of briquette body is equipped with mounting groove, the side of briquette body integrally formed with briquette assembly, the bottom of briquette assembly is hingedly arranged with pressing plate, pressing plate upper end integrally formed with carding member profile, the position of briquette assembly bottom carding member profile is equipped with clamping groove, the bottom of pressing plate integrally formed with three element ethylene propylene rubber.The utility model relates to a kind of briquettes suitable for anti-accumulation of dust assembly, solves the problem of hot anti-accumulation of dust assembly installation on market, and the installation step of conventional assembly is identical, need not add installation step, applicable to single glass or double glass assembly, non anti-accumulation of dust assembly can also be universal, power station end is free from switching, alleviate inventory pressure, EPDM exceeds briquette effectively avoid cutting surface when assembly is stressed to glass, more safe.

The present invention provides two-component aqueous textured layer forming compositions useful for forming flexible top coat layers for sports surfaces. The compositions comprise vulcanized or crosslinked rubber granules, for example, EPDM rubber, a soft:hard acrylic emulsion copolymer blend in a solids weight ratio to vulcanized or crosslinked rubber granule solids that ranges from less than 1:4 to 1:9, a polyalkylene oxide rheology modifier, one or more high boiling alcohols and, as a separate component, an aqueous dispersion of an aliphatic polyisocyanate as well as an epoxy silane. The vulcanized or crosslinked rubber granules may have a sieve particle size of 8 mm or less. The inventive top coat layers have enhanced tensile strength and elongation as well as improved pot life and color stability.

The utility model relates to a rubber preheating device for EPDM rubber floor mat production. The structure comprises: an oven main body, a support main body, a first circular table, a second circular table, a driving motor and an extrusion mechanism. The support main body is symmetrically arranged inside the oven main body. The first circular table is symmetrically installed below the support main body inside the oven main body. The second circular table is arranged above the support main body inside the oven main body. The driving motor is arranged above the second circular table inside the oven main body. The tray containing the rubber is placed on the support main body by installing the first circular table, the second circular table, the driving motor and the extrusion mechanism. The support main body is clamped firmly by the extrusion mechanism of the first circular table. The first circular table moves upward. The lower surface of the second circular table contacts the upper surface of the support main body. The driving motor drives the rotation of the second circular table and the support main body. The hot air generated by the oven main body uniformly contacts the rubber.

The application relates to the technical field of high polymer materials, and discloses an antistatic shoe sole material and a preparation method thereof, which is made of ethylene-vinyl acetate copolymer, ethylene-propylene rubber, cationic POE-carbon nanotube hybrid master batch, dicumyl peroxide, azodicarbonamide and zinc oxide. The cationic POE-carbon nanotube hybrid master batch is prepared by the following steps: pre-compounding alkenyl epoxy functionalized imidazole didodecyl double cationic connecting agent with acidized carbon nanotubes, and then melt grafting the ethylene-octene copolymer thermoplastic elastomer by one-step method; and the epoxy group further reacts with the carboxyl group on the surface of the carbon nanotubes. The application can construct an electronic-ion synergistic conductive network, has low addition amount, long-term antistatic property and high resilience.

The invention relates to a fast-curing environment-friendly double-component organic silicon adhesive and a preparation method thereof. The fast-curing environment-friendly double-component organic silicon adhesive is prepared from a component A and a component B, the component A is prepared from the following components in parts by weight: 30 to 60 parts of hydroxyl-terminated polydimethylsiloxane, 30 to 60 parts of inorganic filler, 1 to 10 parts of ethylene propylene diene monomer-polydimethylsiloxane graft polymer, 1 to 5 parts of amino silicon oil, 1 to 5 parts of fumed silica and 0.2 to 1 part of organic base catalyst; the component B is prepared from the following components in parts by weight: 30 to 60 parts of alkoxy-terminated polydimethylsiloxane, 20 to 50 parts of inorganic filler, 1 to 10 parts of color paste, 1 to 5 parts of a bonding accelerant, 5 to 15 parts of a cross-linking agent and 0.2 to 1 part of a titanate catalyst. According to the double-component organic silicon adhesive disclosed by the invention, the hydroxyl-terminated polydimethylsiloxane and the alkoxy-terminated polydimethylsiloxane are cooperated, and the ethylene propylene diene monomer-polydimethylsiloxane graft polymer is introduced, so that the double-component organic silicon adhesive has an unexpected curing effect and an unexpected curing speed.

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 application relates to the technical field of chemical protection materials, and discloses a hydrofluoric acid protective garment and a preparation method thereof. The material of the protective garment comprises a 5-layer structure, the middle layer is a framework fabric, and modified natural rubber layers and modified EPDM (ethylene propylene diene monomer) rubber layers are sequentially arranged on the two sides of the framework fabric. The raw materials of the modified natural rubber comprise, by weight parts, natural rubber 100 parts, sulfur 3-4 parts, accelerator M 1-2 parts, accelerator DM 1-2 parts, zinc oxide 4-6 parts, stearic acid 1-2 parts, white carbon black 10-15 parts, calcium oxide 20-40 parts, chlorinated paraffin 5-15 parts, antimony trioxide 5-15 parts and antioxidant 4010NA 1-2 parts. The modified natural rubber and the modified EPDM rubber are used as main protection substances, and organic solvents are used as carriers, so that the hydrofluoric acid protective garment not only has long-acting protection capability for hydrofluoric acid, but also has the characteristics of high mechanical strength, heat aging resistance, flame resistance and low-temperature softness.

The invention discloses a rubber composition and a method for processing the rubber composition, and a sealing element using the rubber composition and a production method thereof. The rubber composition comprises, in parts by weight, 100 parts of a rubber matrix, 2-20 parts of a cross-linking system, 60-300 parts of a reinforcing filler, 20-170 parts of a plasticizer and 3-25 parts of a metal oxide, wherein, the rubber matrix comprises a branched polyethylene with a content represented as A, in which 0<A≤100 parts, and both an EPM rubber and an EPDM rubber with a total content represented as B, in which 0≤B<100 parts. The invention provides a sealing element with good compression set resistance.

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 present application relates to high flame-retardant low friction coefficient halogen-free polyolefin sheath material and its preparation and application, belong to sheath material technical field. High flame-retardant low friction coefficient halogen-free polyolefin sheath material of the present application uses ethylene-vinyl acetate copolymer, ethylene-octene copolymer, ethylene-propylene rubber, polyethylene, modified polyolefin resin as matrix material, uses hydrogenated aluminum hydroxide, magnesium hydroxide, flame-retardant synergist and the like as flame-retardant filler, adds lubricant, antioxidant, black mother and the like auxiliary agent after plasticizing mixing and is formed into granules. The oxygen index of the sheath material is far more than the oxygen index standard of sheath material in national standard GB / T 32129-2015 ≥ 30%, and also higher than the oxygen index 38% of the high flame-retardant halogen-free sheath material on sale;And dynamic friction coefficient is less than 0.45 μs, far less than 0.8 μs-2.0 μs of the product on sale.

The application relates to the technical field of adhesives, and discloses a weather-resistant high-adhesion adhesive preparation and a preparation method thereof. The weather-resistant high-adhesion adhesive preparation is prepared by the following steps: preparing an antioxidant modified hydrogen-containing MQ silicone resin by grafting an antioxidant on a hydrogen-containing MQ silicone resin, and adding the antioxidant modified hydrogen-containing MQ silicone resin, methyl vinyl silicone rubber, KH550, antioxidant modified silicon dioxide and phenolic resin into EPDM-g-MAH-containing EPDM rubber base glue; the antioxidant modified hydrogen-containing MQ silicone resin, the antioxidant modified silicon dioxide and the methyl vinyl silicone rubber improve the temperature resistance, weather resistance and anti-aging performance of the material; the phenolic resin improves the bonding performance of the material; the KH550 and the EPDM-g-MAH serve as compatibilizers to improve the compatibility between the components; and the prepared adhesive preparation has excellent weather resistance and bonding performance.

The utility model relates to the field of rubber mixing mills, and discloses a rubber mixing mill based on ethylene propylene diene monomer rubber tube production, which comprises an integral support, a roller mechanism, scraper blade mechanisms and a lifting mechanism, the roller mechanism is arranged in the integral support, the scraper blade mechanisms are fixedly arranged on the integral support corresponding to two sides of the roller mechanism, and the lifting mechanism is arranged on the integral support. By arranging the scraper mechanism, when more rubber materials are attached to the roller, the roller can be quickly cleaned, the scraper mechanism can effectively remove rubber residues on the surface of the roller, it is guaranteed that the roller is kept in a good working state all the time, and the service life of the roller is prolonged. The gap between the rollers can be flexibly adjusted through the lifting mechanism, an operator can accurately control the gap between the rollers according to the characteristics and processing requirements of different sizing materials through the design so as to optimize the pressing effect, meanwhile, the rollers can be conveniently detached from the device, and the operation convenience is greatly improved through the design.