... ). Pipeline control switch.Testing informationItem Index Tensile strength (longitudinal, transverse), Mpa ≥18Elongation at break (longitudinal, transverse), % ≥300Tear strength at right corner (longitudinal, transverse), KN ... , % ≤5Acid and alkali resistance Free of distortion, softening or cracks Tensile strength, elongation at break and tear strength loss ≤10% Heating tolerance (80±2 ...