Is a type that is derived from the combination of polymer additives nakap stylus makes expansion (which are being nathe page car Bon dioxide. When first using c FC which is the chemical destruction of ozone layer.
As a species, is the combination of a copolymer of styrene with substance causes expansion. (That is widely used is pentane or carbon dioxide when using CFC-ozone-depleting substance.
A kind of mixture of polystyrene with substance made to expand. (widely used is pentane or carbon dioxide. Before use, CFCs, which is destroying the ozone layer substance