Tubular, multi-layer film and method of making
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United States of America Patent
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Feb 17, 1987
Grant Date -
N/A
app pub date -
Jul 18, 1985
filing date -
Jul 18, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A tubular film and method for making the film by extrusion provide a multi-layer film having a central layer of barrier material which overlaps itself by a substantial distance along a weld line. The film includes inner and outer adhesive layers positioned on opposite sides of the central barrier layer, which adhesive layers completely encapsulated the central barrier layer. Finally, the film includes inner and outer surface layers. The inner surface layer is positioned within the inner adhesive layer, and the outer surface layer is positioned outside the outer adhesive layer.
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