Shutdown, bilayer battery separator
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United States of America Patent
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Oct 15, 1996
Grant Date -
N/A
app pub date -
Dec 2, 1994
filing date -
Dec 2, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention is directed to a shutdown, bilayer battery separator and a process for making the same. A first microporous membrane with shutdown capability and a second microporous membrane with strength capability are joined together in face-to-face contact. The face of the first membrane being adhered by calendaring, adhesives, or welding, to the face of the second membrane, and the separator having a thickness of less than 3 mils, and a puncture strength, as measured from the second microporous membrane, of greater than 1900 g-mm, and a peel strength of greater than 1 grams/centimeter.
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