... of Europe,Japan, Russia and America. Sandwich panelIntroductionAccording to core material kinds, the sandwich panel includes in Polyurethane(PU), polystyrene( ... EPS) and rock wool or glass wool sandwich panel, the up & down plate is galvanized steel sheet, ... uses many kinds of metal sheets b) Middle: EPS board,PU board,rock woll or glass wool2) Width: according to customers ...