Quite the opposite, sponge rubber usually commences with expandable rubber sorts like EPDM or neoprene. The rubber compound is then supplemented which has a chemical blowing agent, which, upon heating, decomposes and releases gases. This process results in the expansion of the rubber plus the formation of a sponge-like framework. https://rubber-foam-versus-sponge37148.dbblog.net/7127099/foam-rubber-manufacturer-secrets