| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging bag that can be easily torn for opening, forms a neat mouth when torn, and allows easy open by fingers pinching a level difference formed in the mouth to be torn. <P>SOLUTION: The packaging bag has a laminate including outer layers, intermediate layers, and inner layers each having edge heat adhesive parts at facing edges. On one of the outer layers of the laminate, a first cut line is formed which continues from one edge of the edge heat adhesive part to the other edge located on the same position as the start edge in the direction parallel with the edge heat adhesive part. On the other outer layer of the laminate, a second cut line is formed in the same way as the first cut line. In the first and second cut lines, the start edge and the terminal edge include a plurality of cut lines and one cut line connecting them, respectively. When the packaging bag is opened by tearing the mouth along the first and second cut lines, a level difference is formed in the mouth. <P>COPYRIGHT: (C)2012,JPO&INPIT |
