What are the raw materials of sponge?

Chemical sponge: polyurethane soft foam rubber, polyurethane is the most common polymer material in life, widely used in the production of various "sponge" products. And elastic materials for shock and friction protection, such as soles, tractor tank caterpillar substrates.
The production process of sponge is as follows:
A. Mix foaming resins, foaming AIDS, and adhesive resins (to make the finished product adhesive) together.
B. Foaming process. Eighty parts of ethylene acetate (EVA), 20 parts of APAO PT 3385, 20 parts of azodicarbonamide, l9 parts of CaCO and 0. The foam sponge can be made by mixing 6 parts of diisopropyl peroxide together and foaming in the mould. Its density (d) is 0. 028 g/cm, 25% compression hardness 1. 9 KPa.
Most sponges are made of polyurethane, which is the same material as foaming
PU sponge mainly includes polyester and polyether type can be sliced or coiled, and can also be combined processing according to customer requirements, hot pressing processing and blasting hole opening treatment.
PU sponge since it has heat preservation, heat insulation, sound-absorbing, shock absorption, flame retardant, antistatic, breathable performance is good wait for a characteristic, therefore, involve a variety of industries, including automotive, battery industry, cosmetics industry, the chest underwear manufacturing and high-grade furniture manufacturing, etc.