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Natural rubber is a natural polymer compound with isoprene as the main component obtained from natural plants. There are mainly natural rubber containing cis isoprene and trans isoprene containing trans natural rubber. In industry, it also includes modified natural rubber based on natural rubber and treated with various chemical agents.
At present, the consumption of natural rubber in the world has exceeded 8.68 million tons, said from the variety, about 88% for solid rubber. The remaining 12% is latex and liquid natural rubber. Solid rubber, mainly natural rubber, trans-type natural rubber guta wave rubber and chemical modification of special special natural rubber although a wide variety, but the amount is extremely limited.
Before the emergence of a large number of synthetic rubber, natural rubber was the rubber industry and its products of universal raw materials, known as "brown gold". Today, the output of synthetic rubber has exceeded natural rubber, reaching an annual output of 12 million tons, but natural rubber is still recognized as the best performance of general rubber, in tires, medical and health supplies and other fields are the leading raw material rubber.
There are more than 2000 kinds of rubber plants in the world, including trees, shrubs, lianas and herbaceous families. And the quality is good, have economic value, now the hewei subsystem of a large number of planting development of the three-leaf rubber tree. In recent years, the wild silvery rubber chrysanthemum has been improved, and it has begun to be used in Mexico.
