Battery exhaust gas plug filter and process for manufacturing th

Details Battery exhaust gas plug filter and process for manufacturing th Battery exhaust gas plug filter and process for manufacturing th

1988-02-24

1989-12-05

Kalafut, Stephen J.

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

429 86, 427243, 4274071, 4274198, H01M 212, B05D 136

Patent

active

048852180

ABSTRACT:
A battery exhaust gas plug filter is disclosed in which surfaces of pores of an inorganic porous substance composing the filter are coated with a silane or titanium coupling agent inner film before coating them with a fluororesin outer film having finer micro-pores. Accordingly, it is believed that the fluororesin outer film having finer micro-pores comes to be tightly bonded with the surfaces of the pores of the inorganic porous substance through silane or titanium coupling agent inner film, and that even smaller pores of the inorganic porous substance are covered with the silane or titanium coupling agent inner film at least. As a result, the water repellency, gas permeability and strength of the battery exhaust gas plug filter have been improved.

REFERENCES:
patent: 3915752 (1975-10-01), Gross
patent: 3925093 (1975-12-01), Walsh
patent: 4636446 (1987-01-01), Lee
Chemical Abstract: vol. 106, #166253, 1987 Kon et al., corresponds to Japanese 61/250668.

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