POLYOLEFIN PACKING FILM

摘要

PURPOSE:To provide a film excellent in the haze, twist retention ratio and Young's modulus by vertical uniaxial stretching of material film made of a specific high density polyethylene and ethylene-alpha-olefin random copolymer. CONSTITUTION:A copolymer composition made of (A) 95 to 60 part by weight of a high density polyethylene with a density of 0.94 to 0.97 g/cm<3> having a value MI10/MI2.16 calculated from MI2.16 measured by the method prescribed in ASTM D-1238-52T and MI10 determined by this method with the load as 10 kg and (B) 5 to 40 part by weight of ethylene-alpha-olefin copolymer containing ethylene at a content of 60 to 95% by mole are molded to produce a material film. This film is stretched uniaxially in the vertical way at the stretching ratio of more than four fold preferably more than seven fold. This ensures that the horizontal rapture elongativity is maintained at more than 5 percent.