Definitions for "Sponge Rubber"
Vulcanized rubber having a porous or cellular structure like that of a sponge, made by incorporating gasifying substances or blowing agents such as sodium bicarbonate and ammonium carbonate in the mixing, and then vulcanizing in a mold cavity larger than the piece of rubber to be vulcanized. Gas is generated from the dispersed particles of the blowing agent, producing the porous structure and inflating the rubber to the size of the mold cavity.
Cellular structure produced by adding gasifying substance (blowing agent) to a compound, curing in heated molds.
Cellular structure produced by adding gasifying substance to rubber compound, expanding and curing in heated mold. Cells may be open (interconnecting) or closed.