| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag having excellent impact resistance and easy openability, and good appearance.SOLUTION: A film for a packaging bag comprises a sealant layer 10, a substrate layer 30 made of polyamide, and an adhesion layer made of acid-modified polyolefin. The adhesion layer is provided at least between the sealant layer 10 and substrate layer 30, the total thickness is 5 to 40% of the whole thickness. The sealant layer 10 has the thickness of 30 to 60% of the whole thickness. The substrate layer 30 has orientation α in an MD direction of 0.2 to 2.5 measured by infrared two-color method, orientation &bgr; in a TD direction measured by infrared two-color method, the ratio of orientation α/orientation &bgr; is 0.5 to 2.0, and the thickness of 15 to 40% of the whole thickness. |
