The full name of raw rubber is called methyl vinyl silicone rubber, which refers to raw material of silica gel that has not been processed and vulcanized. Generally, raw rubber has high Mooney viscosity, low hardness and transparent appearance. It is used as primary material of silica gel raw material and can not be directly put into vulcanization production.


The full name of mixed rubber is called mixed silicone rubber, which is made of raw rubber, silica and other auxiliary materials through high temperature mixing. Mixed silicone rubber can reduce Mooney, improve hardness and enhance the strength of raw materials of mixed silicone rubber. Mixed silicone rubber is used as a secondary material, which can not be directly put into vulcanization production.


The picture shows the mixing of silicone rubber


Sulfur and color silica gel refers to the mixing of silicone rubber by adding vulcanizing agent and color masterbatch. After being mixed evenly in the mixer, it can be directly vulcanized on the machine to form a variety of silica gel products. Sulfur and color silica gel is generally used as the final raw material.


In general, raw rubber is mixed with silica and other auxiliary materials at high temperature to form mixed silicone rubber, and then sulfur and color silica gel is formed by adding vulcanizing agent and color masterbatch. In terms of production sequence, raw rubber → mixing silicone rubber → adding sulfur and color silica gel