| 摘要 |
A retortable packaging article is made from a heat-shrinkable film having at least three layers. The first layer serves as an inside layer of the packaging article, and contains a polyolefin having a melting point of at least 241° F., and/or a polyamide copolymer having a melting point of from 275° F. to 428° F. The first layer of the film is heat sealed to itself. The second layer is an inner film layer containing at least one semi-crystalline polyamide that makes up at least 65 weight percent of the second layer. The third layer serves as an outside layer of the packaging article, and comprises at least one member selected from the group consisting of (i) a polyolefin having a melting point of at least 241° F., and (ii) a polyamide copolymer having a melting point of from 275° F. to 428° F. The film exhibits a total free shrink at 185° F. of at least 20 percent. At least one semi-crystalline polyamide makes up at least 35 volume percent of the multilayer film. A process for preparing a retorted packaged product utilizes the retortable packaging article.
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