| 摘要 |
PURPOSE:To obtain a polyolefin film, which has tearing directional property lengthwise and enough tensile strength crosswise. CONSTITUTION:A biaxially oriented film is made of a mixture of 95-50wt.%, preferably 85-55wt.%, of polypropylene and 5-50wt.%, preferably 15-45wt.%, of polybutene under the condition that R representing the ratio of lateral draw ratio/longitudinal draw ratio satisfies the relation:0.25<=R<=1.2. |
