Natural rubber is made from latex, and some of the non rubber components contained in latex are left in solid natural rubber.

In general, natural rubber contains 92% - 95% rubber hydrocarbons, while non rubber hydrocarbons account for 5% - 8%.

Due to different preparation methods, different origins and even different rubber picking seasons, the proportions of these ingredients 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 moisture absorption and mildew of rubber, and reduce insulation.

Protein also has the disadvantage of increasing heat generation.

Acetone extract is a number of higher fatty acids and sterols, some of which act as natural antioxidants and accelerators, and others can help powder coordination agents disperse during mixing and soften raw rubber.

Ash mainly contains magnesium phosphate, calcium phosphate and other salts, and a small amount of copper, manganese, iron and other metal compounds.

Because these variable metal ions can promote rubber aging, their content should be controlled.

The moisture in the dry rubber is not more than 1%, which can volatilize during processing. However, if the moisture content is too high, it will not only make the raw rubber easy to mildew during storage, but also affect the rubber processing. For example, the compounding agent is easy to agglomerate during mixing; Bubbles are easily generated during calendering and extrusion, and bubbles or sponges are generated during vulcanization.