Standard Thai Rubber (STR)
Standard Thai Rubber (STR) / Briquette Standard Thai Rubber is a primary natural para rubber product derived from the chopping, grinding and crushing processes of cuplump rubber, crepe rubber (scrap rubbers from sheet rolling), and other natural rubber scraps to be homogeneously mixed, and then taking them to pass heat aging in square feature with size according to the standards as determined by Rubber Division. It is the origin of the product title of “Standard Thai Rubber”. The rubber quality grading of STR has more precise measuring variables than sheet rubber, and its testing parameters are certainly defined according to the standards of the Department of Agriculture. However, the samples of the general comparative testing parameters which are popular for using are Mooney, Po, and Dirt, etc. After testing and acquiring the parameters corresponding to the standards, the product is contained in plastic bag, and Colour Code and Product Type are also specified according to the requirement of Thai Standard Rubber Standards.
The natural STR has higher dirt than sheet rubber, but its uniform quality can be controlled more than sheet rubber, and the natural rubber property is also preserved. It can be used based on different properties. The downstream products that use STR include automobile tyre, sole sheet, rubber hose component, rubber flooring, and wheel rubber, etc.