Appeal 2007-2915
Application 10/151,637
B. Schwarz
[8] Schwarz describes a composite plastic material useful in food
container manufacturing comprising a polyolefin layer, such as an
ethylene-polypropylene random copolymer layer, a styrene-ethylene-
butylene-styrene (SEBS) layer, and a polystyrene layer (Schwarz at
col. 1, ll. 18-20; col. 2, ll. 38-62; col. 3, ll. 24-31; and col. 4, ll. 1-5).
[9] Schwarz adds GMS to the polyolefin, e.g., polypropylene copolymer,
layer when it forms the inner layer of the container as an anti-static
polymer to facilitate release of nested containers (Schwarz at col. 4, ll.
8-12).
[10] Schwarz is silent regarding the amount of GMS added and the
thickness of the inner olefin layer.
C. Wilkie
[11] Wilkie describes a composite plastic film useful in food packaging
comprising a core and a cold seal skin layer (Wilkie at col. 1, ll. 7-23
and col. 3, ll. 9-50).
[12] According to Wilkie,
the skin layer may be used for either or both of two
purposes: as an exposed matte-finish surface layer
which can readily be written on with a variety of
printing inks; or as a cold seal receptive layer for
anchoring a variety of cold seal cohesive
compositions (Wilkie at col. 4, ll. 7-16).
[13] The skin layer may be made of an ethylene-propylene random
copolymer (Wilkie at col. 5, ll. 8-14).
[14] If the skin layer is used as a matte-finish surface layer or as a cold seal
receptive layer, it preferably has a thickness of about 2 to about 20
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Last modified: September 9, 2013