| 摘要 |
A coupled portion of mutual laminate films sufficiently contributes to the formation of a packaging bag, and the coupled portion itself has excellent airtightness and liquid tightness, and a tensile strength required for the laminate film is given to the coupled portion, whereby a temporary stop of a packaging apparatus is useless when a connecting portion of the laminate film is passed through the apparatus and the operation efficiency and efficiency are enhanced and the yield of the material is improved, wherein oriented base film layers (3, 4) are joined in a mitre form at the coupled portion between a rear end portion and a front end portion of laminate films (1, 2) comprising oriented base film layers (3, 4) and sealant layers (5, 6). <IMAGE> |
