Film for print laminates and thermocompression bonding process therefor
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United States of America Patent
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-
Oct 24, 1989
Grant Date -
N/A
app pub date -
Oct 30, 1987
filing date -
Apr 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A film for print laminates comprises a film substrate and a heat-sensitive adhesive resin layer made of polyethylene, a copolymer containing at least 70 wt % of ethylene or a mixture of polymers at least 70 wt. % in total ethylene content. The resin layer is surface-treated by corona discharge in a nitrogen gas atmosphere having an oxygen concentration of less than 20.9 vol. % and has incorporated therein 0.2 to 5 wt. % of a finely divided white material having a mean particle size of 0.2 to 20 microns. When laminated to a print such as printed paper, the film permits the print to retain its original finish and color free of changes despite the lamination.
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