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US 6,663,974 B2Granted
Structures containing a non-oriented multilayer film with a polyolefin core
AssigneeDow Global Technology Inc.
InventorsRobert H. Kelch, Robert L. McGee
Life of this patent
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Abstract
Structures of the present invention contain a non-oriented multilayer film with a polyolefin core having 40 weight-percent or less homogeneous ethylene/alpha-olefin, a modified polyolefin tie layer on each side of the core, and an adhesive layer on at least one tie layer. The adhesive layer contains a polar-modified polyolefin and a polyester, copolyester, or polyester/copolyester blend. The multilayer film has utility as a protective coating for metal surfaces.
Claims19
A structure comprising a non-oriented multilayer film, wherein said multilayer film comprises:
- (a) a first tie layer having opposing first and second surfaces;
- (b) a polyolefin core layer comprising 40 weight-percent or less homogeneous ethylene/alpha-olefin copolymer and having opposing first and second surfaces with the first surface of the core layer adhered to the first surface of the first tie layer;
- (c) a second tie layer having opposing first and second surfaces with the first surface of the second tie layer adhered to the second surface of the core layer;
- and
- (d) a first adhesive layer having opposing first and second surfaces with the first surface of the first adhesive layer adhered to the second surface of the second tie layer;
- the adhesive layer comprising a blend of:
- (i) a polar-modified polyolefin;
- and
- (ii) a polyester, copolyester, or polyester/copolyester blend.
6 more elements
Dependencies are inferred from the claim text.