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Types Of Rubber Material

Apr 30, 2020

Types Of Rubber Material 

Rubber is used in many products, and the composition of rubber is also divided into many types. According to conventional statistics, there are nine types of materials commonly used in rubber. Each rubber material has its specific components and characteristics. In order to make everyone more fully understand the types of rubber, the following content will give you a detailed introduction to the nine types of rubber materials.

1. Natural rubber (NR)

It is mainly composed of rubber hydrocarbons (polyisoprene) and contains a small amount of protein, moisture, resin acids, sugars and inorganic salts. High elasticity, high tensile strength, excellent electrical insulation and tear resistance, good drought resistance and wear resistance, good processability, it is easy to bond with other materials, and it is better than most synthetics in terms of comprehensive performance rubber.

Disadvantages are poor oxygen and ozone resistance, easy aging and deterioration; poor oil resistance and solvent resistance, low resistance to acid and alkali corrosion; low heat resistance. Operating temperature range: about -60 ℃ ~ + 80 ℃. Manufacture of tires, rubber shoes, hoses, tape, wire and cable insulation and sheath, and other general products. It is suitable for manufacturing torsional vibration cancellers, engine shock absorbers, machine supports, rubber-metal suspension elements, diaphragms, and molded products.

2. Butadiene rubber (BR)

It is a cis-structured rubber polymerized from butadiene. The advantages are: excellent elasticity and wear resistance, good aging resistance, excellent low temperature resistance, low heat generation under dynamic load, and easy metal bonding. Disadvantages are lower strength, poor tear resistance, poor processing performance and self-adhesiveness. Operating temperature range: about -60 ℃ ~ + 100 ℃. It is usually used in combination with natural rubber or styrene-butadiene rubber, mainly used to make tire treads, conveyor belts and special cold-resistant products.

3. Nitrile rubber

Nitrile rubber is a polymer made of butadiene and acrylonitrile by emulsion copolymerization. Nitrile rubber is known for its excellent oil resistance. Its oil resistance is second only to polysulfide rubber, acrylate rubber and fluorine rubber. In addition, nitrile rubber also has good wear resistance, aging resistance and air tightness, but ozone resistance, electrical insulation and cold resistance are relatively poor, and the conductivity is relatively good. Therefore, it is widely used in the rubber industry. The use of nitrile rubber is mainly used in oil-resistant products, such as various sealing products. Others are used as PVC modifiers and flame retardant products in combination with PVC, as structural adhesives with phenolic resin, and as antistatic rubber products.

4. Styrene-butadiene rubber

SBR is made by copolymerization of butadiene and styrene. It is a general-purpose synthetic rubber with a large output, including emulsion polystyrene butadiene rubber, solution polystyrene butadiene rubber and thermoplastic rubber (SBR).

5. Silicone rubber

Silicone rubber is composed of silicon and oxygen atoms to form the main chain, the side chain is a carbon-containing group, and the amount of silicon rubber used for the side chain is ethylene. Both heat-resistant and cold-resistant, the use temperature is between 100-300 ℃, it has excellent weather resistance and ozone resistance to use good insulation. The disadvantage is low strength, poor tear resistance, and poor wear resistance. Silicone rubber is mainly used in aviation industry, electrical industry, food industry and medical industry.

6. Isoprene rubber (IR)

It is a cis-structured rubber made from the polymerization of isoprene monomer. The chemical composition and three-dimensional structure are similar to natural rubber, and its performance is close to natural rubber, so it is called synthetic natural rubber. It has most of the advantages of natural rubber, aging resistance is better than natural rubber, elasticity and strength is slightly lower than natural rubber, processing performance is poor, the cost is higher.

Operating temperature range: about -50 ℃ ~ + 100 ℃. It can replace natural rubber to make tires, rubber shoes, hoses, tapes and other general products.

7. Ethylene propylene rubber

Ethylene-propylene rubber is synthesized with ethylene and propylene as the main raw materials, and has outstanding resistance to aging, electrical insulation and ozone. Ethylene-propylene rubber can be filled with oil and carbon black in a large amount. The price of the product is low. The chemical stability of ethylene-propylene rubber is good. The wear resistance, elasticity, and oil resistance are close to those of styrene-butadiene rubber. Ethylene-propylene rubber is very versatile. It can be used as tire sidewalls, rubber strips, inner tubes, and auto parts. It can also be used as wires, cable sheaths, and high-voltage and ultra-high-voltage insulation materials. It can also manufacture light-colored products such as rubber shoes and hygiene products.

8. Neoprene

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, excellent heat resistance, light resistance, aging resistance, oil resistance are better than natural rubber, styrene-butadiene rubber, butadiene rubber. It has strong flame resistance and excellent flame retardancy, its chemical stability is high, and its water resistance is good. The disadvantage of neoprene is electrical insulation performance, poor cold resistance, and raw rubber is unstable during storage. Neoprene has a wide range of uses, such as the production of transport belts and transmission belts, the covering materials of wires and cables, the manufacture of oil-resistant hoses, gaskets, and chemical-resistant equipment linings.

9. Isoprene rubber

Isoprene 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 raw rubber (before processing) is significantly lower than that of natural rubber, but the quality uniformity and processing performance are superior to natural rubber. Isoprene rubber can replace natural rubber for truck tires and off-road tires and can also be used to produce various rubber products.

There are nine types of rubber described above. When you buy rubber products, you can understand the characteristics of different types of rubber in advance and choose the rubber products that suit your needs. I hope that the above content will enable you to learn more about the types of rubber.

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