NBR nitrile rubber

It is produced by emulsion polymerization of butadiene and acrylonitrile. Nitrile rubber is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. Its disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical properties, and slightly lower elasticity.

In addition, it also has good water resistance, air tightness and excellent bonding performance. Widely used in the production of various oil-resistant rubber products, various oil-resistant gaskets, gaskets, sleeves, flexible packaging, soft hoses, printing and dyeing rubber rollers, cable rubber materials, etc., and become indispensable in industries such as automobiles, aviation, petroleum, and copying elastic material.

Nitrile rubber has excellent oil resistance, second only to polysulfide rubber and fluorine rubber, and has excellent wear resistance and air tightness. The disadvantage of NBR is that it is not resistant to ozone and aromatic, halogenated hydrocarbons, ketones and ester solvents, so it is not suitable for insulating materials.

ACC series buried

The main purpose

Nitrile rubber is mainly used to make oil-resistant products, such as oil-resistant pipes, tapes, rubber diaphragms and large oil bags, etc. It is often used to make various oil-resistant molded products, such as O-rings, oil seals, leather cups, diaphragms, valves, bellows etc. It is also used to make rubber sheets and wear-resistant parts.

EPDM three yuan ethylene propylene rubber

EPDM rubber is a terpolymer of ethylene, propylene and non-conjugated dienes, which began commercial production in 1963. The annual world consumption is 800,000 tons. The most important feature of EPDM is its superior oxidation resistance, ozone resistance and corrosion resistance. Since EPDM belongs to the polyolefin family, it has excellent vulcanization characteristics. Among all rubbers, EPDM has the lowest specific gravity. It can absorb large quantities of fillers and oils with little effect on properties. Inexpensive rubber compounds can thus be produced.

Molecular structure and characteristics: EPDM is a terpolymer of ethylene, propylene and non-conjugated dienes. Diene has a special structure, only one of the two bonds can be copolymerized, and the unsaturated double bond is mainly used as a cross-link. The other unsaturated will not become the polymer backbone, only side chains. The main polymer chain of EPDM is fully saturated. This property makes EPDM resistant to heat, light, oxygen, and especially ozone. EPDM is non-polar in nature, resistant to polar solutions and chemicals, has low water absorption, and has good insulating properties.