Natural rubber mainly comes from rubber tree with three leaves. After the epidermis of this rubber tree is cut, milky white juice will flow out. This juice is called latex. Natural rubber is obtained by coagulation, washing, molding and drying.

Synthetic rubber is artificially synthesized, and different kinds of rubber can be synthesized by using different raw materials (monomers).

2. Universal rubber

Refers to rubber varieties that partially or completely replace natural rubber, such as styrene-butadiene rubber, cis-butadiene rubber and isoprene rubber. , mainly used for manufacturing tires and general industrial rubber products. General rubber is in great demand and is the main variety of synthetic rubber.

Styrene butadiene rubber:

Styrene-butadiene rubber (SBR), which is polymerized from butadiene and styrene, is the most widely used synthetic rubber, including emulsion styrene-butadiene rubber, solution styrene-butadiene rubber and thermoplastic rubber (SBS).

Butadiene rubber:

It is made of butadiene by solution polymerization, and cis-polybutadiene rubber has excellent cold resistance, wear resistance and elasticity, as well as good aging resistance. Most of cis-polybutadiene rubber is used to produce tires, and a small part is used to make cold-resistant products, cushioning materials, adhesive tapes, rubber shoes and so on. The disadvantages of cis-polybutadiene rubber are poor tear resistance and poor wet skid resistance.

Isoprene rubber:

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 raw isoprene rubber (unprocessed) is obviously lower than that of natural rubber, but its quality uniformity and processability are better than that of natural rubber. Isoprene rubber can replace natural rubber to make truck tires and off-road tires, and can also be used to produce various rubber products.

Isopropylene rubber:

Ethylene-propylene rubber is synthesized from ethylene and propylene, which has outstanding aging resistance, electrical insulation and ozone resistance. Ethylene propylene rubber can be filled with a lot of oil and carbon black, and the product price is low. Ethylene propylene rubber has good chemical stability, and its wear resistance, elasticity and oil resistance are close to those of styrene butadiene rubber. Ethylene propylene rubber is widely used, which can be used as tire sidewall, rubber strip, inner tube and automobile parts, and can also be used as wire and cable sheath and high voltage and ultra-high voltage insulation material. You can also make light-colored products, such as rubber shoes and sanitary products.

Neoprene rubber:

It is made of chloroprene as the main raw material by homopolymerization or polymerization of a small amount of other monomers. For example, it has high tensile strength, excellent heat resistance, light resistance and aging resistance, and oil resistance is better than natural rubber, styrene-butadiene rubber and cis-butadiene rubber. It has strong flame retardancy and excellent flame retardancy, 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. Neoprene rubber has a wide range of uses, such as making covering materials for transportation belts and transmission belts, wires and cables, making oil-resistant hoses, gaskets and chemical-resistant equipment linings.