Meltblown fiber battery separator

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer – spacer or materials for use therewith

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429143, 429249, 429250, H01M 216

Patent

active

061209392

ABSTRACT:
Battery separator comprising a consolidated nonwoven mat of ultrafine polymeric fibers in which at least 10% of said fibers have a diameter less than 1 micron and which mat has an average pore size of less than 3 .mu.m. The fiber mat is formed by meltblowing using modified conditions to produce a self-bonded web having the desired content of ultra fine fibers.

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