PS Foam Sheet Extrusion machine 1.double screw design 2.good quality with CE approved 4.perfect after-sale service PS Foam Sheet ... shock proofing, sound insulating, heat preservation, damp proof, safety, and good plasticity. It is used widely in the packing of food ... necessities, hardware product, advertisement plate, etc.THE MAIN TECHNICAL SPECIFICATIONS: Good Quality PS Foam Sheet Extrusion Machine