Separator for valve regulated lead-acid battery and valve regulated lead-acid battery
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United States of America Patent
Stats
-
Jul 17, 2012
Grant Date -
Oct 2, 2008
app pub date -
Mar 27, 2008
filing date -
Mar 29, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A separator for a valve regulated lead-acid battery which comprises a paper sheet where very fine glass fiber is a main component, which has a piercing strength (puncture strength) of 4.5 N/mm or more and a tensile strength of 7.0 N/10 mm2 or more. The paper sheet is made by blending 80 to 90% by weight of glass fiber having 1.5 μm or less average fiber size, 5 to 10% by weight of single-material monofilament-form thermally non-adhesive organic fiber (non-heat-bondable organic fiber) and 5 to 10% by weight of single-material monofilament-form thermally adhesive organic fiber (heat-bondable organic fiber) comprising the same kind of material as in the thermally non-adhesive organic fiber in a wet papermaking process whereupon the fiber materials are bonded each other by thermal fusion of the thermally adhesive organic fiber whereby a coat (film) by melting of the organic fiber is not substantially formed on the surface of the glass fiber.
First Claim
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Cited Art Landscape
Patent Citation Ranking
- 11 Citation Count
- H01M Class
- 53.23 % this patent is cited more than
- 13 Age
