Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1983-11-03
1985-11-19
Czaja, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
264 19, 264108, 264113, 264258, B32B 700, B29D 302
Patent
active
045542040
ABSTRACT:
There is provided an FRP molded article having the properties of uniformly reflecting and shielding electromagnetic waves in the range of VHF to EHF. The molded article comprises a compression-molded laminated structure composed of an electroconductive nonwoven fabric-resin composite surface layer, a woven fabric-resin composite intermediate layer, and a fiber material reinforced resin substrate layer. The molded article can be produced by placing, on a mold, an electroconductive nonwoven fabric or a prepreg thereof, a woven fabric or a prepreg thereof, and then a mixture of a reinforcing fiber material and a liquid crosslink-curable resin composition thereon, and subjecting the laminated materials to compression molding. The molded articles can be advantageously used, for example, as reflecting dish antennas as well as shielding sheets or boards for electromagnetic waves.
REFERENCES:
patent: 3112221 (1963-11-01), Price
patent: 3445320 (1969-05-01), Boivin
patent: 3591400 (1971-07-01), Palmquist et al.
patent: 4243460 (1981-01-01), Nagler
patent: 4269800 (1981-05-01), Sommer et al.
patent: 4373001 (1983-02-01), Smith et al.
patent: 4402779 (1983-09-01), Levy
Miwa Eiji
Ono Nobuhiro
Czaja Donald
Fischbach V.
Inax Corporation
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