The density of sponge rubber is just one-third that of foam rubber. This can be attributed to sponge rubber staying composed of organically-derived resources, though foam rubber is composed of petroleum-derived resources. Scientists have uncovered a different kind of super rubber that may be versatile, stretchable, and might perform electricity. https://foam-rubber-manufacturer95050.win-blog.com/14166294/foam-rubber-manufacturer-an-overview