Polyester film for battery current collectors, film foil for battery current collectors, and battery current collectors

JP7632717B1Active Publication Date: 2025-02-19MITSUBISHI CHEM CORP
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Patent Information

Application Number
JP2024039109
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2023-10-27
Filing Date
2024-03-13
Publication Date
2025-02-19
Estimated Expiration
2044-03-13

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Abstract

This contributes to improving the uniformity of the metal layer formed on the polyester film for battery current collectors, and to improving the productivity of film foil for battery current collectors using the polyester film. [Solution] A polyester film for use in a battery current collector, which satisfies the following (1) and (2): (1) The static friction coefficient μs measured by overlapping one surface, side A, with the other surface, side B, is 0.26 or more and 0.75 or less. (2) The ratio (SaB / SaA) of the arithmetic mean height Sa (SaA) of one surface, side A, to the arithmetic mean height Sa (SaB) of the other surface, side B, is 1 or more and less than 1.2 (wherein SaB≧SaA).
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Citation Information

Patent Citations

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