| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a bag body wherein when a bag body whose bottom portion is tightly closed with an inner bottom paper to prevent fine powder having high fluidity from leaking out is opened, foreign matters can be prevented from being mixed into the bag body. SOLUTION: When an inner bottom paper is adhered to an openable bottom end of a cylindrical body, wherein the inner surface is formed from a synthetic resin layer, while the external surface is formed from a kraft paper, and an end part is cut straight, to seal the bottom end, an adhesion retarding material is applied, in a belt like form, to the inner edge of a corner folded part, whereby the adhesive strength between the paper surfaces, i.e., between the inner bottom paper and the openable bottom end, is made approximately equal to the adhesive strength between a paper surface and a synthetic resin surface, so that when the openable bottom end is opened, picking or fluffing of the kraft paper can be prevented, thereby preventing paper fibers from mixing into the contents of the bag.</p> |
