| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve oxygen gas barrier properties of a packaging container and control the permeation quantity of an oxygen gas to a specific value or below by covering an inner wall of a side face of a bottomed container main body and an inner wall of a bottom thereof with in-mold labels having oxygen gas barrier properties and integrating these in-mold labels. SOLUTION: A straight-chain low-density polyethylene comprising a copolymer of polypropylene and polypropylene ethylene and having a density of at least 0.915g/cm<3> is used for a bottomed container main body, and a flange part 2 is allowed to abut against a sealing member in the plane. An in-mold label 3 having oxygen gas barrier properties comprises an in-mold label 32 covering an inner wall of a side face part 4 of the bottomed container main body and an in-mold label 35 covering an inner wall of a bottom 6. Further, the joining of the in-mold label 32 to the in-mold label 35 is integrated at joints 33, 34 of both the labels, and this joining is performed by butting the end faces of both the labels. By this method, oxygen gas barrier properties are improved, and the permeation quantity of an oxygen gas can be controlled to at most 10cm<3> /24h.atm.</p> |
