... net changer system,and round puffing die... PS Foam Sheet Production Machinery(FS-FPP70/90)Product Description: This PS foam sheet ... PS foam sheet, which is a kind of new-type packing with the features of shock proofing, sound insulating, heat preservation, ... , and good plasticity. It is used widely in the packing of food, fruit, electronic product, daily necessities, hardware product, advertisement ...