To put it differently, the kind of cells (open up or shut) both permit or reduce the passage of liquids or gases. But isn’t the nitrogen that’s Utilized in shut-mobile sponge rubber a form of fuel? And aren’t gases Utilized in foam rubber? It’s time to take a further dive. https://huamei-rubber-foam93715.blogsvirals.com/32814810/rubber-foam-versus-sponge-rubber-an-overview