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Natural Material
Advanced Technology

Natural
Rubber

Natural rubber is a derivative of Natural Latex, a white and viscous emulsion extracted from the stem of Hevea Brasiliensis. This tree requires an average temperature of 25-30°C and at least 2 meters per year of rainfall, therefore is mostly grown in the tropical and subtropical regions of Asia, Africa and South America.


Features

Thanks to the broad range of technical properties, Natural Rubber can be used in a wide variety of applications. The most consistent use is recorded in the automotive sector, particularly for the manufacturing of tires. Other uses include: clothing, gaskets, adhesives, protective coatings, piping, etc.

Natural Rubber Types

Natural rubber varieties among our services
  • Natural Rubber: TSR grades
  • Natural Rubber: RSS grades

Natural Rubber: TSR grades

TSR grade rubbers (Technically Specified Rubber) are classified according to their source (field latex or cup-lump) and specific technical parameters. The main exporting countries, namely Malaysia, Thailand, Vietnam and Indonesia, each produce their national standard TSR rubbers: SMR (Standard Malaysian Rubber), STR (Standard Thailand Rubber), SVR (Standard Vietnamese Rubber) e SIR (Standard Indonesian Rubber).

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Natural Rubber: RSS grades

In order to produce RSS grade rubbers, field latex, before reaching a complete coagulation, is processed to remove water and form sheets. After drying by smoking, the sheets are visually analyzed to determine the percentage of impurities and classified on a scale of one to five, in increasing order of impurities.

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Natural Rubber Grades

Natural Rubber: TSR grades

  • BLG (TSR 10)
  • BLG (TSR 20)
  • BLG (TSR 10CV)
  • BLG (TSR 20CV)
  • BLG (TSR CV50)
  • BLG (TSR CV60)
  • BLG (TSR L)


Natural Rubber: RSS grades

  • BLG (RSS 1)
  • BLG (RSS 5)
  • BLG (RSS 2)
  • BLG (RSS 3)
  • BLG (RSS 4)

Natural Rubber Production

Harvest
The extraction from the trunk is done by tapping, the reopening at regular time intervals of a shallow diagonal incision. The latex flows from the cut along a metal spout and into a cup. Once collected, the latex can either be left to coagulate on site (cup-lump), or be transported in liquid form, to be processed later (field latex). This early selection partly determines the rubber grades that will be produced.
It is secreted as Latex by the natural rubber tree. It is a milky liquid containing approximately 30% rubber in the form of very small particles suspended in water. While the Indians obtained latex by cross-cutting trees with an axe, infiltration management was developed with the cultivation of trees in Asia. In this method, the bark of the tree is drawn in a thin line with a knife, the latex flows for about two hours and the latex collected in the containers is coagulated with acid to obtain solid rubber, this rubber is dried in thin layers with hot smoke and made ready for sale. Some of them are sold in the form of latex by taking the water. As a result of the plant development studies, the tree named GUAYULE was produced 10 times more efficient than the rubber tree.
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