Foam absorber

Details Foam absorber Foam absorber

1992-06-29

1993-02-09

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

252 6253, 252511, 428245, 4283179, 4283193, 428408, 521 54, 521135, C08J 940, C08J 942

Patent

active

051853817

ABSTRACT:
A foam absorber having electromagnetic energy attenuation characteristics comprising an open cell reticulated polyurethane foam impregnated with a conductive ink applied to a surface of the foam substrate. The conductive ink is applied as by spraying to a surface of the foam, coating such surface and gradiently loading the foam with the ink by penetration of the ink in gradually decreasing amount into the foam to a final depth therein. The conductive ink is comprised of an epoxy resin carrier and a combination of carbon and a metal such as silver, copper or nickel, preferably silver. The ink is applied as a curable mixture containing a solvent, to the foam substrate, the solvent is evaporated following coating and penetration of the ink into the foam, and the epoxy carrier of the ink in the foam substrate is cured.

REFERENCES:
patent: 4171410 (1979-10-01), Frob
patent: 4578406 (1986-03-01), Volz
patent: 4594362 (1986-06-01), Smith
patent: 5034422 (1991-07-01), Triolo

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