Hydrophilic monomer treated microporous films and process

Details Hydrophilic monomer treated microporous films and process Hydrophilic monomer treated microporous films and process

1980-11-14

1982-08-24

Pianalto, Bernard D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

427 44, 4283197, 428341, 428518, 428520, B05D 306

Patent

active

043461425

ABSTRACT:
The present invention is directed to a process for rendering a normally hydrophobic polyolefinic open celled microporous film relatively permanently hydrophilic, improving the water flow rate therethrough, and reducing the electrical resistance thereof by chemically fixing a controlled amount of at least one hydrophilic organic hydrocarbon monomer to the surface of the micropores of the film with ionizing radiation. The amount of hydrophilic monomer which is chemically fixed to the surface of the micropores is controlled to avoid plugging of the pores subsequent to the radiation treatment.

REFERENCES:
patent: 2999056 (1961-09-01), Tanner
patent: 3215486 (1965-11-01), Hada et al.
patent: 3231530 (1966-01-01), Prahl
patent: 3281263 (1966-10-01), Priesing
patent: 3372100 (1968-03-01), Charlesby et al.
patent: 3709718 (1973-01-01), Schamberg et al.
patent: 3853601 (1974-12-01), Taskier
patent: 4055696 (1977-10-01), Kamada et al.

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