... , g/cm3 0.5-0.8, tensile strength, MPa 12-20, bending strength, MPa 12-18, elastic modulus in bending, MPa ... /m2 8-15, item, unit, result, elongation at break, % 15-20, Shore Hardness, D type, 45-50 water absorption, % ≥1.5 ... -retardant performance, self-extinguishing period is less than 5 seconds PVC expansion plastic board extrusion line