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Classification and Quality Standards of Natural Rubber

Apr 24, 2018

According to different manufacturing processes and shapes, films can be divided into cigarette smoke, air-dry film, white wrinkle film, and brown wrinkle film. Smoke tablet rubber is the most representative variety of natural rubber, and it has always been a plastic type with a large amount and a wide range of applications. Smoke tablet rubber is generally classified according to the shape and is divided into the special grade, first grade, second grade, third grade and fourth grade. There are six grades such as grade five and grade five.

Granule glue (namely standard glue) is classified according to the internationally unified physical and chemical efficacy and indicators. These physical and chemical properties include impurity content, plastic initial value, plastic retention rate, nitrogen content, volatile matter content, ash content, and cluster index. The item, which is dominated by the impurity content, is divided into five levels of 5L, 5, 10, 20, and 50 according to the number of impurities.