Appeal No. 1997-2234
Application 08/254,345
sealant layer has a thickness of from about 1 percent to 20
percent, based on the total thickness of the multilayer film, and
may be comprised of, inter alia, an ionomer. Appellants’ core
seal-assist layer is comprised of first and second components
wherein the first component may be, inter alia, an ethylene/vinyl
acetate copolymer and the second component may be, inter alia, a
plastomer.
The applied prior art reference to Norpoth describes an
example of a multilayer film having an outer layer comprised of
“IONOMER” which has a thickness of 19.89 percent, based on the
total thickness of the multilayer film, and a core layer
comprised of an ethylene/vinyl acetate copolymer first component
and a second component of a linear ethylene 1-octene copolymer
(i.e., an ethylene/alpha-olefin copolymer commonly referred to as
linear low density polyethylene (LLDPE)) having a density of
0.920 g/cc (EAO-1 sold as Dowlex 2045.03 by Dow). See Norpoth’s
example 13 at column 11 and column 5, lines 57-61. Because
appellants’ specification indicates that the term “plastomer”
includes a homogeneous ethylene/alpha olefin copolymer having a
density of from “about 0.86 to 0.91" and because Norpoth
indicates that ethylene-alpha olefin polymers (such as the
exemplified higher alpha olefin Dowlex 2045-03) “have a density
-4-
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