| 摘要 |
PURPOSE:To improve packing characteristic and durability by employing a polyethylene film having specific physical property balance. CONSTITUTION:A polyethylene film has 600kg/cm<2> of more of longitudinal tensile strength, 300% or less of longitudinal tensile elongation, 3.5kg.cm/cm<2> or more of longitudinal tear strength, 60% or more of longitudinal thermal shrinkage factor, and 20% or more of lateral thermal shrinkage factor. The mixing amount of radial generation agent is selected from a range of 0.0001-0.1 pts.wt. to total amount of linear polyethylene and branched low density polyethylene. The linear polyethylene, the branched polyethylene and the agent are kneaded to be reacted, then pelletized, and inflation molded. An oriented film is then longitudinally uniaxially oriented under the conditions of -70-20 deg.C of melting point of resin composition at the elongating temperature and 1.5-8 times of elongating magnification. |
