| 摘要 |
PURPOSE:To obtain a film excellent in tearing strength, impact strength, rigidity and tensile force even when the thickness is reduced, by applying longitudinal uniaxial stretching to a raw film, which is formed from a specific linear polyethylene resin under a specific condition by inflation molding, under a specific condition. CONSTITUTION:0-50pts.wt. of low density branch polyethylene wherein density is 0.91-0.95g/cm<3>, a melt index is 2g/10min or less and a flow ratio is 70 or less is compounded with 100-50pts.wt. of linear polyethylene wherein density is 0.91-0.965g/cm<3>, a melt index is 2g/10min or less and a flow ratio is 50-120 or more to prepare a resin composition which is, in turn, subjected to inflation molding under such a condition that a blow-up ratio is 2-8 and a frost line height is 2D-5D (D; the diameter of a die). The obtained film is uniaxially stretched in a film take-up direction under such a condition that stretching temp. is lower by 70-20 deg.C than the m.p. of the resin composition and a draw ratio is 1.5-8. |
