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VACUUM PACKAGING FILMS PATTERNED WITH PROTRUDING CAVERNOUS STRUCTURES
VACUUM PACKAGING FILMS PATTERNED WITH PROTRUDING CAVERNOUS STRUCTURES
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机译:带有穴形穴状结构的真空包装薄膜
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摘要
The present invention teaches a film having a pattern of protruding structures. When used in the vacuum packaging bag material context, the result is a vacuum packaging bag that a consumer can effectively evacuate and hermetically seal. The protruding structures tend to form channels that enable gas to evacuate from within a vacuum packaging bag. In certain embodiments, the protruding structures are formed only on an inner side of the vacuum packaging film, typically through a hot casting or heat-extrusion process. As a result, far less bag material is required than in the prior art patterned film formed through cold embossing processes. The present invention also contemplates a variety of applications for the films, including preformed bags and bag rolls, as well as a variety of apparatus for manufacturing the films and appliances for utilizing the bags and bag rolls.
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