Appeal No. 1998-3115
Application No. 08/384,520
and JP ‘258. EP ‘813 teaches that the disclosed flexible
polypropylene resin is useful for making, for example,
automotive parts, industrial machine parts, electric or
electronic parts, and construction materials (page 3, lines
40-43). EP ‘589 teaches that the disclosed soft, flexible
polypropylene resin has excellent flexibility and mechanical
strength over a temperature range from normal to high
temperatures and is useful as, for example, a packaging film
or sheet, a building construction sheet, a carpet backing, an
insulator for cable, a fiber, and a base material for tape
(page 2, lines 21-27). JP ‘258 teaches that the disclosed
polypropylene composition has improved impact resistance and
can be molded into a film (pages 4 and 7).
Canich teaches, however, that “for such high strength
applications, the poly-"-olefin resin must generally have a
high degree of crystallinity. Low crystallinity and amorphous
poly-"-olefins are useful in adhesive compositions, in
compatibilizing applications, as additives, etc.” (col. 3,
lines 39-44). Canich also teaches that “[a]tactic polymers
exhibit little if any crystallinity, hence they are generally
unsuitable for high strength applications regardless of the
8
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