| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag which allows tearing apart linearly with a beautiful cut line in the circumferential direction, in opening by opening from a notch provided in a back bonding part and separating the upper part from the lower part of the packaging bag and has excellent filling suitability.SOLUTION: A packaging bag is produced by forming a back bonding part by superimposing both right and left end parts of a laminate having a heat sealing resin layer as the innermost layer, in a principal-rafter-like form, to obtain a cylindrical body, respectively sealing tightly the upper and lower openings of the cylindrical body and providing a notch as a trigger for opening at a predetermined location of the back bonding part and used by hat cutting of the part upper than the notch. An opening guide line starting from a part of the back bonding part lower than the notch, extending obliquely upward from the notch and then extending nearly horizontally, and the opening guide line is drawn as a continuous line in right and left central parts of the front face and the back face and, in other areas, as a discontinuous line with small opening guide lines drawn at intervals. |
