| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging bag which exhibits no fluctuation on its thickness, has a stable barrier properties, can exhibit easily peelable properties, and capable of storing a relatively long content with a thin packaging material. SOLUTION: The packaging bag comprises a main body film (10) and a lid body film (20). In the main body film, both sides of it are folded into Z shapes by making a sealant layer inward and in parallel to the film flowing direction, and a bottom part (10a), folded parts (11) and lid body receiving parts (12) are successively formed to form a storing part (13) with a crosssection of an approximatelyΩshape. The inside face of the main body film and the inside face of the lid body film are joined to hot weld end edges (s and s) of a lid body receiving part and the lid body film. Hermetic sealings are performed by appropriate intervals to the flow direction and the sealed parts are cut. COPYRIGHT: (C)2005,JPO&NCIPI |
