| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag that can be sealed by a simple operation, and even if the sealing operation is repeated, can be sealed many times like an initial operation.SOLUTION: A packaging bag is manufactured by using a packaging material having a sealant layer laminated on an inner face thereof, and includes side seal portions 14 at least located on both right and left side edges. A projecting piece 13 arranged astride the right and left side seal portions 14 is installed at an inner position from an upper edge of an outer face of either one of a surface side or a back face side. By using a root of the projecting piece 13 as a base point, a folding-back portion C is folded back to a side opposite to the projecting piece 13 relative to a body H so as to enable sealing. In either of the folding-back portion C and the body portion H which oppose to each other when folded back, an adhesive means for locking the folding-back portion C and the body portion H on each other is installed. |
