... psp foam sheet extrusion line, psp foam sheet extrusion machine, psp foam sheet machine, psp foam sheet making machine, psp foam sheet production line factory ... double-stage series high foam technology. The raw material is general polystyrene granule. In the extruding process, vesicant is ... plate, supermarket tray, cake tray ,KT board, instant noodle bowl, foam tray etc. It is widely used in the ...