Non-woven fabric base material for lithium ion secondary battery separator and lithium ion secondary battery separator
AssigneeMitsubishi Paper Mills Limited
InventorsTomohiro SATO, Toshihiro SHIGEMATSU, Makoto KATO, Kenji HYODO, Wakana AIZAWA
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Abstract
A non-woven fabric base material for a lithium ion secondary battery separator composed mainly of a polyethylene terephthalate fiber, characterized in that the non-woven fabric base material comprises a polyethylene terephthalate binder fiber and a crystallized polyethylene terephthalate fiber, and the content of a polyethylene terephthalate binder fiber having a fiber length of 2.5 mm or less is 10 to 60 mass %.
Claims3
1-3. (canceled)
A non-woven fabric base material for a lithium ion secondary battery separator composed mainly of a polyethylene terephthalate fiber, characterized in that:
- the non-woven fabric base material comprises a polyethylene terephthalate binder fiber containing 3,5-dicarbomethoxy benzene sulfonic acid as a copolymer component.
Dependencies are inferred from the claim text.