What are the materials of rubber soft joint?

Songjiang rubber soft joint main material introduction; 1, natural rubber (NR) to rubber hydrocarbons (polyisoprene) based on a small amount of protein, moisture, resin acid, sugar and inorganic salts. High elasticity, high tensile strength, excellent tear resistance and electrical insulation, good abrasion and drought resistance, good processability, easy to bond with other materials, in terms of comprehensive performance is better than most synthetic rubber. Disadvantages are poor oxygen and ozone resistance, easy to aging and deterioration; oil and solvent resistance is not good, the first resistance to acid and alkali corrosion ability is low; heat resistance is not high. Temperature range: about -60℃~+80℃. It is used for making tires, rubber shoes, hoses, adhesive tapes, insulating layers and sheaths of wires and cables, and other general-purpose products. Especially suitable for the manufacture of torsion vibration eliminator, engine shock absorber, machine support, rubber-metal suspension components, diaphragms, molded products.　　2, styrene-butadiene rubber (SBR) butadiene and styrene **** polymer. Performance close to natural rubber, is currently the largest production of general-purpose synthetic rubber, characterized by abrasion resistance, aging resistance and heat resistance over natural rubber, the texture is more uniform than natural rubber. Disadvantages are: lower elasticity, anti-flexing, tear resistance is poor; poor processing performance, especially poor self-adhesion, low strength of raw rubber. Temperature range: about -50℃~+100℃. Mainly used in place of natural rubber to make tires, rubber plates, hoses, rubber shoes and other general-purpose products.　　3, chloroprene rubber (CR) is made of chloroprene monomer emulsion polymerization polymer. This rubber molecule contains chlorine atoms, so compared with other general-purpose rubber: it has excellent resistance to oxygen and ozone, non-flammable, self-extinguishing after fire, oil resistance, solvent resistance, acid and alkali resistance and aging resistance, airtightness, etc.; its physical and mechanical properties are also better than natural rubber, so it can be used as a general-purpose rubber, but also used as special rubber. The main disadvantage is that the cold resistance is poor, specific gravity, relatively high cost, electrical insulation is not good, easy to stick roll, easy to burn and easy to stick mold processing. In addition, the stability of raw rubber is poor, not easy to save. Temperature range: about -45℃~+100℃. Mainly used in the manufacture of ozone-resistant, ageing-resistant cable sheath and a variety of protective cover, protective cover; oil-resistant, chemical-resistant hoses, tapes and chemical lining; flame-resistant rubber products for underground mining, as well as a variety of molded products, seals, mats, adhesives and so on.　　4, butyl rubber (IIR) is isobutylene and a small amount of isoprene or butadiene **** polymer. The biggest feature is good airtightness, ozone resistance, aging resistance, high heat resistance, long-term working temperature can be below 130 ℃; can resist strong inorganic acids (such as sulfuric acid, nitric acid, etc.) and organic solvents in general, vibration absorption and damping characteristics are good, electrical insulation is also very good. Disadvantages are poor elasticity, poor processing performance, slow vulcanization, poor adhesion and oil resistance. Use temperature range:about -40℃~+120℃. Mainly used as inner tubes, water tires, balloons, wire and cable insulation, chemical equipment lining and shockproof products, heat-resistant transport belts, heat-resistant aging tape products.　　5, NBR (NBR) butadiene and acrylic **** polymer. Characterized by gasoline and aliphatic hydrocarbon oil resistance is particularly good, second only to polysulfide rubber, acrylate and fluoroelastomer, but better than other general-purpose rubber. Heat resistance is good, air tightness, abrasion and water resistance are good, strong bonding. Disadvantages are poor cold and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation, and poor resistance to polar solvents. Temperature range: about -30℃~+100℃. Mainly used in the manufacture of various oil-resistant products, such as hoses, sealing products.　　6, ethylene propylene rubber (EPM\\EPDM) Ethylene and propylene **** polymer, generally divided into binary ethylene propylene rubber and three yuan ethylene propylene rubber. Characterized by ozone resistance, ultraviolet resistance, weather resistance and aging resistance is excellent, ranking first in general-purpose rubber. Electrical insulation, chemical resistance, impact elasticity is very good, acid and alkali resistance, small specific gravity, can be highly filled with. Heat resistance up to 150 ℃, resistant to polar solvents - ketone, ester, etc., but not resistant to aliphatic hydrocarbons and aromatic hydrocarbons, other physical and mechanical properties slightly inferior to natural rubber and better than styrene butadiene rubber. Other physical and mechanical properties are slightly inferior to natural rubber and better than SBR. The disadvantage is that the self-adhesive and mutual adhesion is very poor, not easy to bond. Temperature range: about -50℃~+150℃. Mainly used as chemical equipment lining, wire and cable wrapping, steam hose, heat-resistant transportation belt, automotive rubber products and other industrial products.　　7, silicone rubber (Q) for the main chain containing silicon, oxygen atoms of the special rubber, which plays a major role is the element silicon. Its main feature is both high temperature (up to 300 ° C) and low temperature (minimum -100 ° C), is currently the best hood Ai cold, high-temperature rubber; at the same time excellent electrical insulation, thermal oxidation and ozone stability is very high, chemical inertia. Disadvantages are lower mechanical strength, oil resistance, solvent resistance and poor acid and alkali resistance, more difficult to vulcanize, more expensive. Use temperature:-60℃~+200℃. Mainly used in the production of high and low temperature products (hoses, seals, etc.), high temperature wire and cable insulation, due to its non-toxic and tasteless, but also for the food and medical industry.　　8, fluorine rubber (FPM) is made of fluorine-containing monomer **** polymerized organic elastomers. Its characteristics of high temperature resistance up to 300 ℃, acid and alkali resistance, oil resistance is the best oil-resistant rubber, radiation resistance, high vacuum performance; electrical insulation, mechanical properties, chemical resistance, ozone resistance, atmospheric aging resistance are excellent. Disadvantages are poor processing, expensive, poor cold resistance, low elasticity and permeability. Temperature range:-20℃~+200℃. Mainly used in the defense industry to manufacture aircraft, rockets on the vacuum-resistant, high-temperature, chemical-resistant sealing materials, hoses or other parts and the automotive industry.