Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1986-11-24
1988-02-02
McCamish, Marion C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428244, 428289, 428408, B65G 4300
Patent
active
047228601
ABSTRACT:
A flexible electrically conducting cloth is described which comprises a plurality of intermingled or interwoven refractory fibers the sheet resistance of which exceeds 1,000 ohms per square inch and a conducting coating encapsulating a majority of the fibers, the coating including at least about 70 atomic percent carbon and being applied in sufficient quantity to render the cloth electrically conducting with a sheet resistance which lies between about 0.1 ohm per square inch and about 1,000 ohms per suqare inch. The cloth is useful as an electrical resistance heater, an electromagnetic shield, an electromagnetic reflector, or as an antenna. It is formulated by contacted substantially the entire surfaces of the intermingled or interwoven fibers with a carbon containing precursor, the fibers being at a temperature between about 700.degree. C. and 1200.degree. C., whereby the fibers are covered with a pyrolyzed coating formed from the precursor in an amount of at least about 0.001 weight percent. The cloth may be laminated between plastic sheets or imbedded in a plastic matrix.
REFERENCES:
patent: 3854979 (1974-12-01), Rossi
patent: 3940509 (1976-02-01), Youtsey et al.
patent: 4296855 (1981-10-01), Blalock
patent: 4510077 (1985-04-01), Elton
patent: 4510193 (1985-04-01), Blucher et al.
patent: 4578313 (1986-03-01), Ito et al.
Hawley, Condensed Chemical Dictionary, 10th Edition, pp. 887.
Doljack Frank A.
Matlow Sheldon L.
Rickborn Steven F.
Rogers Donald Z.
Anderson Terry J.
Block Robert B.
McCamish Marion C.
Northrop Corporation
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