Method of making filter paper

Details Method of making filter paper Method of making filter paper

1984-09-04

1987-12-01

Weston, Caleb

Coating processes

Foraminous product produced

Filter, sponge, or foam

156242, 156250, 156289, 210504, 210505, 210506, 210508, 427289, 427370, B05D 500

Patent

active

047104023

ABSTRACT:
A flat annular disc filter paper has a plurality of randomly oriented fibers at its surface. The paper is impregnated with a phenolic resin so as to resist compression of the disc and swelling of the paper. The filter paper is made by soaking the paper in the resin, heating the paper and resin so as to burn and melt the resin into close contact with the paper and rolling the filter paper at a temperature above ambient temperature.

REFERENCES:
patent: 2568144 (1951-09-01), Cremer et al.
patent: 2654440 (1953-10-01), Robinson
patent: 2773602 (1956-12-01), Sylvester
patent: 3294582 (1966-12-01), Suchy
patent: 4161422 (1979-07-01), Lawson et al.
patent: 4472229 (1984-09-01), Martin

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