| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging bag linearly openable in its circumferential direction from an opening notch of the packaging bag in opening it, excelling in processing suitability and distribution suitability, and capable of keeping the strength of a packaging material, in a packaging bag where a packaging material is formed of a laminated body of at least an outer layer material such as a stretched film and an inner layer material having a heat-sealable resin layer in the innermost layer. <P>SOLUTION: The packaging bag has a tubular structure composed by forming a back-pasted sealing portion by thermally bonding, in a form of praying palms, both side ends of a packaging material formed of a laminated body having a heat-sealing resin layer in the innermost layer, and sealing a bottom part and a top part. The packaging bag includes an opening notch located at a predetermined part of the back-pasted sealing portion and an opening guidance line for guiding tear of the packaging bag nearly in the horizontal direction, wherein the vertical rupture strength of the packaging material is not less than 5 N/15 mm in measurement by JIS K-7161. <P>COPYRIGHT: (C)2012,JPO&INPIT |
