| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light blocking packaging bag made by considering demands such as withstanding filling, transportation and preservation on actual use while satisfying content protection performance by light blocking properties and barrier properties without poor appearance as a packaging bag, preventing poor appearance caused by a pin hole, and avoiding a decrease in content protection performance, and especially, eliminating poor appearance caused by fish eye so as to eliminate occurrence of a pin hole.SOLUTION: A packaging bag in which three sides of overlapped laminated films are sealed, and an opening is sealed and enclosed after filling content from the opening is configured such that the laminated films are obtained by arranging a biaxial drawing polypropylene film 1 as the outermost layer, a film made by sticking a barrier film 3 and a biaxial drawing white nylon film 5 as the intermediate layer, and a black polyethylene film 7 as the innermost layer, and the outermost layer and the intermediate layer are stuck to each other, and the intermediate layer and the innermost layer are stuck to each other, by an extrusion lamination system using polyolefin resin.</p> |
