| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging bag which can be resealed inexpensively and easily. <P>SOLUTION: The packaging bag includes a packaging bag body having unsealed part at one side, wherein a sheet-shaped or a rod-shaped shape-retaining material is laminated in a substantially vertical direction to the unsealed part. The shape-retaining material consists of a stretched polyolefin resin sheet or a rod and has shape-retaining properties, wherein return angles θ are both 20° or less when 5 minutes has passed since the shape-retaining material was released after being folded at 180° or 90° in the longitudinal direction and the substantially vertical direction and was held for one minute. <P>COPYRIGHT: (C)2012,JPO&INPIT |
