... ad scutcheon, exhibition board, remark board; industrial application: antisepsis project, thermal moulding parts, boards for refrigeratory, boards for special cold ... Physical performance index of PVC free style expansion boards: item, unit, result, surface density, g/cm3 0.5-0.8, ... 15-20, Shore Hardness, D type, 45-50 water absorption, % ≥1.5, Vicat softening point, °C 73-76 fire-retardant performance ...