What are the main components of natural rubber

Nov 09,2021


Natural rubber is made of latex, and some of the non-rubber components contained in the latex remain in the solid natural rubber. Generally, natural rubber contains 92% -95% rubber hydrocarbons, while non-rubber hydrocarbons account for 5% -8%. Due to different production methods, different origins and even different rubber mining seasons, the proportions of these components may vary, but they are basically within the range.

Protein can promote the vulcanization of rubber and delay aging. On the other hand, protein has strong water absorption, which can cause rubber moisture absorption and mildew, insulation decline, and protein has the disadvantage of increasing thermogenicity.

Acetone extracts are some high-grade fatty acids and steroids, some of which act as natural antioxidants and accelerators, and some can help the powdered compounding agent disperse during the mixing process and soften the raw rubber.

Ash mainly contains magnesium phosphate and calcium phosphate salts, there is a small amount of copper, manganese, iron and other metal compounds, because these metal ions can promote rubber aging, so their content should be controlled.

The moisture in the dry rubber does not exceed 1%, which can evaporate during processing, but when the moisture content is too much, it will not only make the raw rubber easy to become moldy during storage, but also affect the processing of the rubber, such as compounding during mixing. The agent is easy to agglomerate; bubbles are easily generated during calendering and extrusion, and bubbles or spongy shapes are generated during vulcanization.