| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging container for retort food which has sufficient seal strength even after retort treatment under a high temperature and high pressure condition and can keep barrier properties even after the retort treatment under the high temperature and high pressure condition and after the molding into a container, and a packaging laminated material. SOLUTION: The packaging laminated material is composed of the outermost polypropylene layer, a paper base material layer, an intermediate polypropylene layer, a composite barrier layer and the innermost polypropylene layer using a metallocene catalyst. The composite barrier layer is composed of an aluminum foil layer and an extrusion coatable polyamide layer, which is composed of 60-100% of a polymer component A of a condensation polymer (nylon-MXD6) of metaxylenediamine and adipic acid and 0-40% of a polymer component B of nylon-6(PA-6), nylon-66(PA-66) or a blend (PA-6/66) of nylon-6 and nylon-66 and characterized in that the aluminum foil layer is laminated on the side of the innermost layer and the polyamide layer is laminated on the side of the paper base material layer. COPYRIGHT: (C)2007,JPO&INPIT |
