Appeal 2007-2851
Application 10/308,702
comprising a thermoplastic polymer that has a melting point of not more
than 230°F.
30. A film structure prepared as a substrate for an extrusion-coated
outer layer, wherein the film structure comprises (i) a base layer consisting
of a propylene homopolymer and, optionally, one or more additives selected
from the group consisting of beta nucleators, cavitating agents, opacifying
agents, hydrocarbon resins, anti-blocks, anti-static agents, coefficient of
friction (COF) modifiers, processing aids, colorants, clarifiers, and
ionomers, and (ii) an additional layer on one side of the base layer
comprising an ethylene polymer, wherein the additional layer is receptive to
an extrusion-coated outer layer on a side of the additional layer opposite the
base layer.
The Examiner relies upon the following references in the rejection of
the appealed claims:
Barkis US 3,285,766 Nov. 15, 1966
Tatsumi US 3,877,969 Apr. 15, 1975
Idea JP 50-104282 A Aug. 18, 1975
Breitenfellner US 3,925,591 Dec. 9, 1975
Breidt US 4,147,827 Apr. 3, 1979
Liu US 4,695,503 Sep. 22, 1987
Wilhoit US 5,407,611 Apr. 18, 1995
Appellants’ claimed invention is directed to a coextruded, biaxially
oriented film comprising a base layer and a first outer layer. Both layers
comprise a thermoplastic polymer, but the polymer of the outer layer has a
melting point of not more than 230°F. Appellants also claim a film structure
for receiving an extrusion-coated outer layer comprising a base layer
consisting of polypropylene and optional additives and an additional layer
comprising an ethylene polymer.
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