Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including interlaminar mechanical fastener
Patent
1990-09-06
1992-12-22
Lesmes, George F.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including interlaminar mechanical fastener
428267, 428272, 428290, 428286, 4284763, B32B 2734
Patent
active
051733595
ABSTRACT:
A composite material for electrical applications reinforced by a para-oriented aramide fibrous substance made of a para-oriented aramide fibrous substance selected from the group consisting of poly(p-phenylene terephthalamide) fiber and poly(p-phenylene-3,4'-diphenyl ether terephthalamide) fiber, a thermosetting resin matrix and a polymer having at least one specific reactive cross-linking group selected from the group consisting of carboxyl group, epoxy group, hydroxyl group and methylol group. The polymer resides at the interface between the para-oriented aramide fibers and the thermosetting resin matrix. The composite material for electrical applications can be prepared according to a method having the steps of treating a para-oriented aramide fibrous substance selected from the group consisting of poly(p-phenylene terephthalamide) fiber and poly(p-phenylene-3,4'-diphenyl ether terephthalamide) fiber with an emulsion containing a polymer carrying at least one reactive cross-linking group selected from the group consisting of carboxyl, epoxy, hydroxyl and methylol groups and a particle size ranging from 0.01 to 0.08 .mu., drying the treated fibrous substance and then laminating the fibrous substance with a thermosetting resin matrix. The composite material shows excellent properties well suited for use, in particular, as a composite material for electrical applications or a reinforcing substrate such as a printed circuit board or an insulating laminate.
REFERENCES:
patent: 4637851 (1987-01-01), Ueno et al.
patent: 5002637 (1991-03-01), Toyoshima et al.
Kimura Megumi
Toyoshima Setuo
Honshu Paper Co. Ltd.
Lesmes George F.
Shelborne Kathryne E.
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