Pre-dispersed Rubber Chemicals CaO-80 avoids spongy defect in the presence of vapor, it can be used as a hygroscopic agent in rubber and plastic products to absorb the moisture brought by the fillers, vulcanizing agents, accelerants, foaming agents, etc. used in the production process. JXBHgran CaO-80 can be used as a hygroscopic agent in rubber and plastic products to absorb the moisture brought by the fillers, vulcanizing agents, accelerants, foaming agents using in the production process .The section is uniform, dense, and the surface is smooth and beautiful. This product is especially suitable for the normal pressure vulcanized rubber assembly line,and it is one of the essential additives.