The types of rubber are divided into 3: a natural rubber, a composite rubber, a synthetic rubber, synthetic rubber is refined in petroleum, and the composite rubber is in 95%~99.5% natural rubber added butadiene, benzene butadiene, nitrile, ethylene propylene, butyl and other chemical composition, made of composite rubber. Compound rubber mainly looks at the composition of what is, for example: there is a standard rubber, it is called the standard rubber compound. There is smoke film composite, it becomes smoke gum composite. Natural rubber and compound rubber are the main varieties imported in China.
Bucket elevator conveyor belt imports of natural rubber to pay the duty of 20%, while composite rubber does not pay the duty. So this is also the reason why many rubber factories purchase composite rubber.
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