... steel panel2. Core material---The density of this(mineral)Rock wool is: 120-250kg/m33. Side steel strip or not ... ' s requestmaterialsPolystyrene foam board(EPS), Color steel sheet,Rock woolStructureUpper and lower layer: Color steel sheetMiddle: polystyrene ... Detailed parameters: 1. Composition: Core materials: EPS, XPS,Rok wool, Glass wool,PU, PUR Surface materials: PPGI, GI, Stainless steel sheet, ...