| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laminate packaging material for use with food articles which is advantageous in cost and a retortable pouch including the material. SOLUTION: The laminate material includes an outer polyethylene terephthalate layer, a nylon second layer and a polypropylene inner layer. A solventless adhesive is used to bond the layers together. The solventless adhesive includes surface-modified exfoliated montmorillonite clay platelets. The platelets lie generally parallel to the plane of the laminate and partially overlap to form a barrier to oxygen and other volatile materials. The retortable pouch is formed by heat-sealing edges of one or more sheets of the laminate such that the polypropylene layers face inward and welded together. The pouch and its contents can be pasteurized by heat treatment without degradation of the laminate or the heat seal.</p> |
