| 摘要 |
<p>The invention discloses a composite film for packing foods and the process of making it. The composite film can adjust the inside pressure of the packing automatically when it is heated. The composite film comprises substrate layer which has plural of micro-crack structure areas, and sealing layer which is stuck to the substrate layer by a gluing layer, it is especially used as food packing container or bag. The composite film can be directly frozen or refrigerated after filled in food and sealed, and can be directly placed in microwave oven and heated without blowing up. The composite film has a function of regulating the high steam in heat pressure, therefore it can prevent a number of heat steam running off and avoid the food dried or hardened.</p> |
