Polyethylene microporous membrane and process for manufacturing same
AssigneeToray Battery Separator Fim Co., Ltd.
InventorsHideto Mitsuoka, Shintaro Kikuchi, Kazuhiro Yamada
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Abstract
A polyethylene microporous membrane has a Gurley air permeability of 1 to 1,000 sec/100 mL/25 μm, wherein the total length of waviness widths in the width direction of the polyethylene microporous membrane is not more than one-third of the overall width of the microporous membrane. The polyethylene microporous membrane has excellent planarity without compromising any other important physical property such as permeability.
Claims17
-8. (canceled)
A polyethylene microporous membrane having a Gurley air permeability of 1 to 1,000 sec/100 mL/25 μm, wherein a total length of waviness widths in a width direction of the polyethylene microporous membrane is not more than one-third of an overall width of the microporous membrane.
Dependencies are inferred from the claim text.