Pouch or sack for packing and laminate film therefor and method for producing the pouch
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United States of America Patent
Stats
-
Oct 18, 1988
Grant Date -
N/A
app pub date -
Sep 21, 1987
filing date -
Mar 19, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed are a pouch for containing a material therein, a laminate film for the pouch, and a method for producing the pouch. The laminate film comprises a first plastic layer and at least one second plastic layer on which said first plastic layer is laminated. The first plastic layer is partially subjected to surface roughening treatment prior to the lamination, and surface irregularities are filled with a plastic material of the second plastic layer. In a pouch having substantially rectangular shape, at least one folded portion is provided at a side edge of the pouch. The surface roughened portion is positioned at and around the folded portion and at an external surface of the pouch. In one embodiment, the folded edge is provided at one side of the pouch and a heat sealed portion is provided at the other side edge thereof. In another embodiment, folded portions are provided at both side edges of the pouch and a heat-sealed portion is provided at a rear central portion thereof.
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