On the contrary, sponge rubber routinely starts with expandable rubber styles like EPDM or neoprene. The rubber compound is then supplemented using a chemical blowing agent, which, on heating, decomposes and releases gases. This process brings about the expansion in the rubber as well as formation of the sponge-like structure. https://water-proof-rubber-foam83604.collectblogs.com/78740731/considerations-to-know-about-huamei-rubber-foam