Diaxially stretched copolymer film

摘要

Biaxially stretched copolymer film Polyethylene, at 1-10 pref. 2-7 wt.% is added to polypropylene. The modulus of elasticity is >220 kp/mm2 in any dim. and the ratio fo longitudinal and transverse moduli of elasticity is 0.75-1.25. The tear strength is >20 kp/mm2 in all dims. and varies according to dim by a factor of 0.85-1.15 and the ult. extension is 80%. Shrinkage is =10% in any dim.