... . Corrosion resistance11. Scientific designTesting Report of the pvc profile quality Test itemsStandardTest itemsStandardHardness,HRR≥85Veka softening point,≥83Tensile strength,MPa≥37Status ... elasticity modulus, MPa≥1960Oxgen index,%≥38Low temperature drop weight impact test≤1High-low temperature dimension reciprocal change rate,%±0.2Charpy impact ...