| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a packaging bag capable of reliably recognizing any defective seal caused by a bite even when using shading packaging films. <P>SOLUTION: The packaging bag 10 is formed by superposing two shading packaging films 11, 12 having at least a transparent sealant layer 19 and a barrier layer 15 including a shading metal layer 17 and sealing peripheral parts thereof. A transparent aperture 25 having no metal layer 17 which extends substantially over the entire longitudinal direction within a bag mouth seal area 23 to be sealed after filling a content 30 is formed only in one shading packaging film 12. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
