Method for the manufacture of material absorbing ultra-high freq

Details Method for the manufacture of material absorbing ultra-high freq Method for the manufacture of material absorbing ultra-high freq

1980-11-04

1983-06-07

Lawrence, Evan K.

Coating processes

Foraminous product produced

Filter, sponge, or foam

4273935, 4274301, B05D 302, B05D 312

Patent

active

043871224

ABSTRACT:
A method of producing a material for absorbing ultra-high frequency waves from a starting porous material having closed cells includes the steps of immersing the porous material into a fluid having a liquid component, suspended carbon, and a dissolved polymerizable binder, applying sufficient pressure to the fluid to open the closed cells of the porous material, allowing the fluid to disperse into the opened cells, removing the porous material from the fluid, drying the porous material to remove the liquid component, and closing the cells by polymerizing the binder.

REFERENCES:
patent: 1825509 (1931-09-01), Collins
patent: 3239585 (1966-03-01), Karpovich et al.
patent: 4046939 (1977-09-01), Hart
Siemens Zeitschrift, vol. 40, No. 4, Apr. 1966, pp. 326-328.
Chemical Abstracts, vol. 84, No. 24, Jun. 14, 1976, Reference 207274B, p. 55.

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