Appeal 2007-4307
Application 10/173,095
and inner skin, made of graphite and KEVLARŪ aramid fibers, respectively,
each wound with an epoxy resin. The inner skin was cured at 250°F then
attached to an aluminum core using a reticulated adhesive film. The outer
skin was then applied and co-cured with the core and inner skin. Chee notes
that the fibers could also be pre-impregnated with resin, but teaches that
using such fibers is more costly.39
Nakanishi relates to epoxy resin compositions containing an epoxy
compound, a nitrile rubber, and a novolac phenol resin.40 For some
applications, the composition may be pre-cured.41 The composition may be
used as the resin for fiberglass-reinforced plastic.42 It adheres strongly to
metal and, once cured, has superior heat, impact, and chemical resistance.43
Scanlon relates to face sheets for use in acoustic abatement,
commonly for gas turbine
engines.44 Scanlon FIG. 5
(right) illustrates an
embodiment of the invention,
in which the face sheet is
formed as a laminate of two
dry-woven mattes 40, 42. The
39 Chee 3:54-4:18.
40 Nakanishi 3:1-3.
41 Nakanishi 5:13-17.
42 Nakanishi 5:24-6:7.
43 Nakanishi 6:8-11.
44 Scanlon 1:8-15.
10
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