Rubber is divided into natural rubber and synthetic rubber according to raw materials. According to the form, it is divided into block raw rubber, latex, liquid rubber and powder rubber. Latex is a colloidal water dispersion of rubber; liquid rubber is a rubber oligomer, which is generally a viscous liquid before vulcanization; powder rubber is latex processed into powder to facilitate batching and processing. Thermoplastic rubber developed in the 1960s does not require chemical vulcanization, but is formed using the processing method of thermoplastic plastics. Rubber is divided into general type and special type according to its use. It is an insulator and is not easy to conduct electricity, but if it is exposed to water or different temperatures, it may become a conductor. Conductivity is about the ease of conduction of electrons in molecules or ions inside a substance.

Rubber is divided into natural rubber and synthetic rubber. Natural rubber mainly comes from the Hevea brasiliensis. When the skin of this rubber tree is cut, a milky white juice will flow out, called latex. The latex is condensed, washed, formed and dried to obtain natural rubber. Rubber products
Synthetic rubber is made by artificial synthesis. Different raw materials (monomers) can be used to synthesize different types of rubber. From 1900 to 1910, chemist C.D. Harris determined that the structure of natural rubber is a polymer of isoprene, which opened up a way for artificial synthetic rubber. In 1910, Russian chemist SV Lebedev (1874-1934) used metallic sodium as an initiator to polymerize 1,3-butadiene into sodium butadiene rubber. Later, many new synthetic rubber varieties appeared one after another, such as cis-butadiene rubber, chloroprene rubber, styrene-butadiene rubber, etc. The output of synthetic rubber has greatly exceeded that of natural rubber, among which styrene-butadiene rubber has the largest output.
General-purpose rubber
It refers to the type of rubber that partially or completely replaces natural rubber, such as styrene-butadiene rubber, cis-butadiene rubber, isoprene rubber, etc., which is mainly used to manufacture tires and general industrial rubber products. The demand for general-purpose rubber is large and it is the main type of synthetic rubber.
Styrene-butadiene rubber
Styrene-butadiene rubber is made by copolymerization of butadiene and styrene. It is the most produced general-purpose synthetic rubber, including emulsion-polymerized styrene-butadiene rubber, solution-polymerized styrene-butadiene rubber and thermoplastic rubber (SBS).
Butadiene rubber
It is made by solution polymerization of butadiene. Butadiene rubber has particularly excellent cold resistance, wear resistance and elasticity, and also has good aging resistance. Most of butadiene rubber is used to produce tires, and a small part is used to make cold-resistant products, cushioning materials, tapes, rubber shoes, etc. The disadvantages of butadiene rubber are poor tear resistance and poor wet and slip resistance.
Isoprene rubber
Isoprene rubber is the abbreviation of polyisoprene rubber and is produced by solution polymerization. Isoprene rubber, like natural rubber, has good elasticity and wear resistance, excellent heat resistance and good chemical stability. The strength of isoprene rubber raw rubber (before processing) is significantly lower than that of natural rubber, but its quality uniformity and processing performance are better than those of natural rubber. Isoprene rubber can replace natural rubber to make load-carrying tires and off-road tires, and can also be used to produce various rubber products.
Ethylene Propylene Rubber

Ethylene Propylene Rubber is synthesized with ethylene and propylene as the main raw materials, and has outstanding aging resistance, electrical insulation and ozone resistance. Ethylene Propylene Rubber can be filled with a large amount of oil and carbon black, and the product price is relatively low. Ethylene Propylene Rubber has good chemical stability, and its wear resistance, elasticity, oil resistance and styrene-butadiene rubber are similar. Ethylene Propylene Rubber has a wide range of uses. It can be used as tire sidewalls, rubber strips and inner tubes, as well as automobile parts. It can also be used as wire and cable sheaths and high-voltage and ultra-high-voltage insulation materials. It can also be used to make light-colored products such as rubber shoes and sanitary products.
Chloroprene Rubber

It is made of chloroprene as the main raw material, through homopolymerization or copolymerization of a small amount of other monomers. Such as high tensile strength Rubber products
, excellent heat resistance, light resistance, aging resistance, and oil resistance are better than natural rubber, styrene-butadiene rubber, and butadiene rubber. It has strong flame resistance and excellent flame retardancy resistance, high chemical stability and good water resistance. The disadvantages of chloroprene rubber are poor electrical insulation and cold resistance, and the raw rubber is unstable during storage. Chloroprene rubber has a wide range of uses, such as being used to make transport belts and transmission belts, sheathing materials for wires and cables, and manufacturing oil-resistant hoses, gaskets, and chemical-resistant equipment linings.