How to classify tire rubber according to rubber type?

Tire rubber, as the core material in tire manufacturing, is mainly classified according to the type of rubber. The following is a detailed classification of tire rubber by rubber type:

1、 Natural rubber (NR)

Source: Made from latex of three leaf rubber tree, the basic chemical composition is cis polyisoprene.

Characteristics: It has excellent resilience, tensile strength, elongation, wear resistance, and tear and compression permanent deformation performance superior to most synthetic rubbers.

Application: Commonly used in the manufacturing of key parts such as the tread and sidewall of tires, providing excellent wear resistance and comfort.

2、 Synthetic rubber

1. Styrene butadiene rubber (SBR)

Source: Prepared by copolymerization of butadiene and styrene.

Characteristics: The comprehensive performance is comparable to natural rubber, and the wear and thermal aging performance is superior to natural rubber.

Application: Widely used in tire manufacturing, especially when combined with natural rubber, to improve the overall performance of tires.

2. Nitrile rubber (BR)

Source: Prepared by solution polymerization of butadiene.

Characteristics: Vulcanized butadiene rubber has particularly excellent cold resistance, wear resistance, and elasticity. It generates less heat under dynamic loads and has good aging resistance.

Application: Commonly used for tire tread and sidewall rubber, providing excellent wear resistance and cold resistance.

3. chloroprene rubber (CR)

Source: Made from chloroprene as the main raw material, through homopolymerization or copolymerization with a small amount of other monomers.

Features: Excellent weather resistance, oil resistance, flame retardancy, and insulation performance.

Application: Commonly used for manufacturing tire seals, rubber hoses, and wire and cable sheath materials.

4. Nitrile rubber (NBR)

Source: polymer formed by lotion copolymerization of butadiene and acrylonitrile.

Features: Excellent oil resistance, wear resistance, and tear resistance, but relatively poor cold resistance.

Application: Commonly used for manufacturing oil resistant sealing parts, membranes, and rubber hoses for tires.

5. Ethylene propylene rubber (EPDM)

Source: Ethylene propylene binary copolymer (EPM) or ethylene propylene diene terpolymer (EPDM).

Features: weather resistance, ozone aging resistance, resistance to steam, phosphate hydraulic oil, acid, alkali, as well as rocket fuel and oxidizer, excellent electrical insulation performance.

Application: Commonly used as sealing parts, rubber hoses, and wire insulation layers for tires.

6. Butyl rubber (IIR)

Source: A copolymer of isobutene and isoprene.

Features: Excellent airtightness, good heat aging resistance and ozone aging resistance.

Application: Commonly used for inner tubes of tires, door and window seals, and wire insulation layers.

7. Hydrogenated Nitrile Rubber (HNBR)

Source: Nitrile rubber is hydrogenated to remove some double chains.

Features: Temperature resistance and weather resistance are much higher than ordinary nitrile rubber, and oil resistance is similar to ordinary nitrile rubber.

Application: Commonly used for manufacturing sealing products and oil seals for high-performance tires.

8. Fluororubber (FPM)

Source: Commonly used are fluororubber-26, fluororubber-246, etc., which are copolymerized from different fluorine-containing monomers.

Characteristics: It has outstanding heat resistance, oil resistance, acid and alkali resistance, excellent aging performance and electrical insulation performance.

Application: Commonly used in manufacturing tire sealing parts and fuel tanks that require heat and oil resistance.

9. Silicone rubber (MVQ, etc.)

Source: A type of polysiloxane, usually including dimethyl silicone rubber (MQ), methyl vinyl silicone rubber (MVQ), etc.

Characteristics: It has excellent heat resistance, cold resistance, and aging resistance, as well as excellent insulation resistance and dielectric properties.

Application: Commonly used for manufacturing tire sealing rings, sealing profiles, and shock absorbers.

These different types of rubber have their own unique properties and applicable scenarios, and tire manufacturers will choose the appropriate rubber type for manufacturing based on the design requirements and usage environment of the tire.