What is raw rubber, the type and application range of rubber

Raw rubber is the main material used in the manufacturing of rubber products. Rubber products are widely used, and different rubber products are used in different situations. For example, natural rubber is often used in areas such as automotive tires that require high physical and mechanical properties due to its excellent comprehensive physical and mechanical properties. However, due to the high number of double bonds (i.e. high unsaturation) in natural rubber, it is easy to react with oxygen in the air (i.e. aging), causing performance degradation and affecting its service life. It is often used in combination with styrene butadiene and cis-1,4-polybutadiene rubber to improve performance and reduce costs; If rubber products need to work in an oil resistant environment, natural rubber can swell in oil and be damaged, so rubber with good oil resistance such as nitrile rubber can only be used; If applied in the human body, it can only be used as a material for heart valves, ventricular catheters, or plastic surgery. Silicone rubber has the best compatibility in the human body and is not prone to biological rejection; If rubber dams are manufactured, chloroprene, butyl, or ethylene propylene diene rubber with good weather resistance should be used.

Due to the wide variety of rubber, there are dozens of types and hundreds of grades. There are two general classifications: general rubber and special rubber; It is also divided into saturated rubber and high unsaturated rubber; Classification of polar rubber and non-polar rubber.

General rubber includes: natural rubber, styrene butadiene rubber, cis-1,4-polybutadiene rubber, butyl rubber, chloroprene rubber, nitrile rubber, chlorinated polyethylene, ethylene propylene diene monomer, etc.

Special rubbers include: silicone rubber, fluorine rubber, fluorine silicone rubber, fluorine ether rubber, fluorine nitrile rubber, polysulfide rubber, polyurethane, etc.

The basic properties of various rubbers can be detailed in the rubber industry manual

Different types of rubber factories use different types of rubber due to product needs, but they can generally be roughly classified

Tire factory: Natural rubber, styrene butadiene rubber, and cis-1,4-polybutadiene rubber are used as the main materials for tire outer tubes. The inner tube is made of butyl rubber, and the airtight layer of the radial tire is made of chlorinated butyl rubber. The diaphragm and capsule used as production tools are made of butyl rubber. In diagonal tires, the triangular rubber generally uses more recycled rubber.

Rubber hose and tape factory: natural rubber, styrene butadiene rubber, cis-1,4-polybutadiene rubber, chloroprene rubber, nitrile rubber, recycled rubber, chlorosulfonated polyethylene, polyvinyl chloride and other polymer materials, as well as some latex.

Rubber mold factory: All types of rubber are used.

Due to different types of rubber, their performance indicators, packaging, initial viscosity, processing performance, etc. are all different;

Even if the same type of rubber has different processing techniques, their performance will also be different; For example, styrene butadiene rubber can be divided into emulsion polymerized styrene butadiene and solution polymerized styrene butadiene. Among them, emulsion polymerized styrene butadiene includes high-temperature styrene butadiene (1000 series), low-temperature styrene butadiene (1500 series), low-temperature styrene butadiene carbon black masterbatch rubber (1600 series), low-temperature oil-extended styrene butadiene rubber (1700 series), low-temperature oil-extended styrene butadiene carbon black masterbatch rubber (1800 series), high styrene styrene styrene butadiene rubber, liquid styrene butadiene rubber, carboxyl styrene butadiene rubber, and other series of varieties, with different performance Each purpose has its own emphasis.