Rubber products refer to rubber products with certain special properties. Mainly including: ① Neoprene rubber products. CR, abbreviated as CR, is obtained by polymerization of chloroprene. It has good comprehensive performance, including oil resistance, flame resistance, oxidation resistance, and ozone resistance. But its density is relatively high, it is prone to crystallization and hardening at room temperature, has poor storage performance, and poor cold resistance Nitrile rubber products. NBR, abbreviated as NBR, is obtained by copolymerization of butadiene and acrylonitrile. Good oil and aging resistance, suitable for long-term use in air at 120 ℃ or oil at 150 ℃. In addition, it also has water resistance, air tightness, and excellent bonding performance Silicone rubber products. The main chain is composed of alternating silicon and oxygen atoms, with organic groups on the silicon atoms. High and low temperature resistance, ozone resistance, and good electrical insulation. ④ Fluorine rubber products. Synthetic rubber products containing fluorine atoms in their molecular structure. Usually represented by the number of fluorine atoms in the fluorine containing unit of the copolymer, such as fluorine rubber product 23, which is a copolymer of vinylidene fluoride and trifluoroethylene chloride. Fluorine rubber products are resistant to high temperature, oil, and chemical corrosion. ⑤ Polysulfide rubber products. It is formed by condensation of dihaloalkanes with polysulfides of alkali or alkaline earth metals. It has excellent oil and solvent resistance, but its strength is not high, its aging resistance and processability are not good, and it has a foul odor. It is often used in combination with nitrile rubber products. In addition, there are also polyurethane rubber products, chlorohydrin rubber products, acrylic rubber products, etc.

The basic process of rubber product processing includes basic processes such as molding, mixing, rolling or extrusion, forming, and vulcanization. Each process has different requirements for the product and is accompanied by several auxiliary operations. In order to add various required additives to rubber products, raw rubber first needs to be plasticized to improve its plasticity; Then, carbon black and various rubber product additives are evenly mixed with rubber products through mixing to form a rubber compound; The rubber material is pressed out to form a certain shape blank; Then combine it with textile materials (or metal materials) that have been calendered, glued or coated to form a semi-finished product; After vulcanization, semi-finished products with plasticity are made into highly elastic products.

Rubber products are divided into natural rubber products and synthetic rubber products according to their raw materials. It can be divided into block shaped raw rubber, latex, liquid rubber products, and powder rubber products according to their morphology. Latex is a colloidal water dispersion of rubber products; Liquid rubber products are oligomers of rubber products, which are generally viscous liquids before vulcanization; Powder rubber products are made by processing latex into powder form for easy ingredient preparation and processing. The thermoplastic rubber products developed in the 1960s do not require chemical vulcanization, but are formed using the processing method of thermoplastic. Rubber products can be divided into two categories based on their use: general and special types.

Universal rubber products have good comprehensive performance and are widely used. Mainly including: ① Natural rubber products. The basic chemical composition is cis polyisoprene, which is obtained from latex from three leaf rubber product trees. Good elasticity, high strength, and good overall performance Isoprene rubber products. The full name is cis 1,4-polyisoprene rubber product, which is a high cis synthetic rubber product made from isoprene. Due to its similar structure and properties to natural rubber products, it is also known as synthetic natural rubber products Styrene butadiene rubber products. SBR, abbreviated as SBR, is obtained by copolymerization of butadiene and styrene. According to the production method, it can be divided into lotion polymerized styrene butadiene rubber products and solution polymerized styrene butadiene rubber products. Its comprehensive performance and chemical stability are good. ④ Polybutadiene rubber products. The full name is cis 1,4-polybutadiene rubber product, abbreviated as BR, obtained by polymerization of butadiene. Compared with other general-purpose rubber products, vulcanized cis-1,4-polybutadiene rubber products have excellent cold resistance, wear resistance, and elasticity. They generate less heat under dynamic load and have good aging resistance. They are easy to be used in combination with natural rubber products, chloroprene rubber products, nitrile rubber products, etc.