1. Natural rubber NR

　　(Natural Rubber) latex from rubber trees collected are made, the isoprene polymer. With good wear resistance, high elasticity, tensile strength and elongation. Aging in the air easily, become sticky when exposed to heat, mineral oil or gasoline in the expansion and easy to dissolve, but the impatience of alkali acid. * Is the production of adhesive tape, rubber hose, rubber raw materials and components for production of damping in the brake oil, ethanol and other liquid with a hydroxyl in the use of products.

　　2. SBR S B R

　　(Styrene Butadiene Copolyme) and styrene butadiene copolymer, compared with natural rubber, uniform quality, a small foreign body, but the mechanical strength is weak, can be used with natural rubber blends. Advantages: low-cost non-oil resistant material good water resistance, hardness below 70 high hardness with good elastic compression with less distortion can be neutral with most chemicals and dry, zi of the organic-one Disadvantages: * is not recommended to use strong acids, ozone, oils, ester oils and fats, and most of the hydrocarbons being. * Widely used in the tire industry, footwear,? Cloth industry and conveyor industries.

　　3. Butyl rubber IIR

　　(Butyl Rubber) for the polymerization of isobutylene and a small amount of isoprenes, retain a small amount of unsaturated sulfur base for use, due to steric hindrance of methyl molecules less movement than other polymers, so the less gas permeability, heat, sunlight, ozone, the major resistance, electrical insulation resistance; polar solvents such as alcohols, ketones, esters and other resistance to a large, general temperature range of -54 ~ 110 ℃. Advantages: • Most tools are not generally the gas permeability of the sun and with good resistance to ozone may be exposed to animal or vegetable oils or chemicals in the oxidizable Cons: * do not build meaning and petroleum solvents, kerosene plastic and aromatic hydrogen simultaneously. * For the production of chemical resistance, vacuum equipment, rubber parts.

　　4. HNBR hydrogenated nitrile rubber

　　(Hydrogenate Nitrile) hydrogenated nitrile rubber is hydrogenated nitrile rubber is removed after the part by double-stranded, hydrogenated after its temperature resistance, weather resistance than NBR improve a lot, oil and similar general nitrile rubber. General temperature range of -25 ~ 150 ℃. Advantages: more nitrile rubber has better abrasion resistance with excellent corrosion resistance, tensile, tear and compression distortion characteristics in ozone, sunlight and other atmospheric conditions with good resistance to general is suitable for laundry or dishwashing detergent in the disadvantages: - not recommended for use in alcohols, esters or aromatic solution being. * Air conditioning and refrigeration industry, widely used in environmentally friendly refrigerant R134a system seals. • Automotive Engine system seals.

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