Multilayer, biaxially stretched, high-barrier plastic skin
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United States of America Patent
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Apr 1, 2003
Grant Date -
N/A
app pub date -
Sep 11, 2000
filing date -
Sep 14, 1999
priority date (Note) -
Expired
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Abstract
A multilayerd, biaxially stretched tubular film having the following sequence of layers, .vertline.A.vertline.B.vertline.C.vertline.D.vertline.E.vertline.F.vertlin e.G.vertline., is described. Inner layer A contains at least one member selected from the group consisting of aliphatic (co)polyamide and partially aromatic (co)polyamide. Core layer E, consists essentially of at least one member selected from the group consisting of aliphatic (co)polyamide and partially aromatic (co)polyamide. Outer layer G contains at least one member selected from the group consisting of aliphatic (co)polyamide and partially aromatic (co)polyamide. Interlayer C is polyolefinic, has water vapor barrier properties, and is interposed between inner layer A and core layer E. Interlayer C is directly attached to layer A via coupling layer B and to layer E via coupling layer D. Coupling layers B and F each independently contain a modified polyolefin. Interior layer F has oxygen barrier properties, and is interposed between outer layer G and core layer E. The composition of inner layer A, core layer E and outer layer G are each independent one from the other.
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