Natural rubber generally refers to an elastic solid or liquid which is obtained by a latex collected from a cultivated Brazilian hevea tree and subjected to a processing step such as solidification or drying. It is a natural polymer compound containing polyisoprene as a main component. Its rubber hydrocarbon (polyisoprene) content is above 90%, and it also contains a small amount of protein, fatty acid, sugar and ash. Natural raw rubber can be divided into ordinary solid natural rubber, special solid natural rubber, modified natural rubber and its derivatives, among which ordinary solid natural rubber is divided into tobacco film, air-dried film, chalk film and light-colored film, and glue. Bracts, standard rubber, etc. Standard rubber is generally classified by technical performance as the index, with impurity content as the main index, plastic retention rate as the secondary index, and nitrogen content, volatile matter and ash as the guarantee index.
Natural rubber has good elasticity, air tightness and insulation properties, excellent flex resistance, low heat generation and low hysteresis loss, and can be used in combination with various rubbers. Has good processing properties, the disadvantages are oil, alkali, weathering and solvent resistance, not strong acid. Natural rubber is widely used in various rubber miscellaneous parts. It can be used in the manufacture of treads, carcasses, sidewalls, inner tubes, etc. It can also be used in the manufacture of hoses, tapes, general mechanical seals, sponge products, surgical medical supplies, latex products, etc. In terms of family life, rubber is commonly used in household appliances and rubber hoses. The countries producing natural rubber in the world mainly include Malaysia, Indonesia, Thailand, India, China and other countries. According to statistics, 43 gum-growing countries around the world have a planting area of nearly 10 million hectares, including Malaysia, Indonesia, Thailand and India. The area of planted rubber accounts for about 75% of the world's total area, and production accounts for about 77% of the world's total production. In 2001, the world's natural rubber production reached 7 million tons.
