... come from polyurethane foam and furniture factory.Main specification:Preferred density range : 15 to 35 kg/m3Clean & dry unused ... no less tha 20000kgsKeywords: mattress material, furniture parts, sofa materials, sponge, foams, packing box foams, bath mats, PU foams, protective ... pieces, foam leftover bits, foam scraps, polyurethane foam, high density foams, high elastic foams, slow rebound foams. High ...