1. Rubber is divided into natural rubber and synthetic rubber.
Natural rubber is mainly derived from the three-leaf rubber tree, when the skin of this rubber tree is cut, it will flow out milky white sap, called latex, latex through agglomeration, washing, molding, drying to obtain natural rubber. Synthetic rubber is prepared by synthetic method, and different kinds of rubber can be synthesized by using different raw materials (monomers).
2. General rubber
It refers to the rubber used partially or completely instead of natural rubber, such as styrene-butadiene rubber, cis-butadiene rubber, isoprene rubber, etc., which is mainly used in the manufacture of tires and general industrial rubber products. General rubber is in high demand and is the main variety of synthetic rubber.
Styrene-butadiene rubber:
Styrene-butadiene rubber is made from the copolymerization of butadiene and styrene, and is the largest general synthetic rubber, including emulsion polystyrene-butadiene rubber, dissolved polystyrene-butadiene rubber and thermoplastic rubber (SBS).
cis-butadiene rubber:
It is prepared by solution polymerization of butadiene, cis-butadiene rubber has particularly excellent cold resistance, wear resistance and elasticity, and also has good aging resistance. Most of the cis-butadiene rubber is used in the production of tires, and a small part is used in the manufacture of cold-resistant products, cushioning materials, tapes, rubber shoes, etc. The disadvantages of cis-butadiene rubber are poor tear resistance and poor wet slip resistance.
Isoprene:
Isoprene rubber is the abbreviation of polyisoprene rubber, which is produced by solution polymerization. Like natural rubber, isoprene rubber has good elasticity and wear resistance, excellent heat resistance and good chemical stability. The strength of isoprene rubber (before processing) is significantly lower than that of natural rubber, but the quality uniformity and processing performance are better than natural rubber. Isoprene rubber can replace natural rubber to manufacture load tires and off-road tires, and can also be used to produce various rubber products.
Isopropylene rubber:
Ethylene propylene rubber is synthesized with ethylene and propylene as the main raw materials, and has outstanding aging resistance, electrical insulation performance and ozone resistance. EPDM rubber can be filled with oil and carbon black in large quantities, the price of products is low, EPDM has good chemical stability, wear resistance, elasticity, oil resistance and styrene-butadiene rubber are close. Ethylene propylene rubber is widely used, can be used as tire sidewalls, rubber strips and inner tubes, and automobile parts, can also be used as wire, cable wrapping and high-voltage, ultra-high-voltage insulation materials. It can also manufacture light-colored products such as rubber shoes and hygiene products.
Neoprene:
It is made of chloroprene as the main raw material by homopolymerization or copolymerization of a small amount of other monomers. Such as high tensile strength, excellent heat resistance, light resistance, aging resistance, oil resistance are better than natural rubber, styrene-butadiene rubber, cis-butadiene rubber. It has strong flame resistance and excellent flame resistance, high chemical stability and good water resistance. The disadvantages of neoprene rubber are electrical insulation properties, poor cold resistance, and unstable raw rubber during storage. Neoprene is used in a wide range of applications, such as conveyor belts and drive belts, wire and cable wrapping materials, oil-resistant hoses, gaskets, and chemical resistant equipment linings.
Rubber type code:
NR: Natural rubber Nautal rubber
IR: Polyisoprene
SBR: Styrene Butadiene Copolyme