Appeal 2006-1305
Application 10/236,270
[sic, have] excellent thermobonding resistance, cold-bonding resistance, and
operability” (Translation 3). Watanabe also discloses “discover[ing] that the
cold-bonding resistance and the operability can be made favorable by
combining . . . [an] ethylene – vinyl acetate copolymer with another ethylene
– vinyl acetate copolymer that has a different melt index and a different
vinyl acetate content” (Translation 5). Thus, Watanabe’s ethylene-vinyl
acetate copolymer component comprises first and second ethylene-vinyl
acetate copolymers (id.). The combined amounts of the two ethylene-vinyl
acetate copolymers of Watanabe are disclosed as preferably 5-60 wt % of
the first ethylene-vinyl acetate copolymer and 95-40 wt % of the second
ethylene-vinyl acetate copolymer (Translation 10).
Watanabe broadly discloses the first ethylene-vinyl acetate copolymer
(designated as EVA1 by the Examiner) as having a melt flow index of
10-5,000 grams/10 minutes and a vinyl acetate content of 5-40%
(Translation 6). The second ethylene-vinyl acetate copolymer (designated as
EVA2 by the Examiner) is broadly disclosed as having a melt flow index of
10-800 grams/10 minutes and a vinyl acetate content of 21-50% (id.). The
Examiner notes:
Watanabe discloses a hot melt adhesive having
high heat and cold resistance comprising EVAl
having a low polar content (vinyl content of 5-
40%) and a high melt flow index (10-5000 g/10
minutes), [and] EVA2 having a high polar content
(vinyl content of 21- 50%) and a low melt flow
index (10-800 g/10 minutes). [Answer 8; emphasis
deleted.]
5
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