Paper laminate and method for producing the laminate and paperboard containers
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United States of America Patent
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Feb 21, 1989
Grant Date -
N/A
app pub date -
May 29, 1987
filing date -
May 29, 1987
priority date (Note) -
Expired
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Abstract
A laminated web is composed of a paper substrate having a layer of oriented polyethylene terephthalate film bonded to one surface and a layer of polyolefinic resin covering its second surface. The film presents an exposed surface having the known property of being heat sealable to itself, but is not heat sealable to polyolefinic resins. The web can be used successfully in the production of end products, such as containers, that include seams produced by employing flame heat sealing techniques. Flame activation of the sealed surfaces permits heat sealing of opposite surfaces of the web to one another without use of an adhesive. Containers produced by the use of this laminate evidence high retention of volatile materials and flavor oils commonly lost during storage of food products within containers made from paper laminates.
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