POROUS POLYIMIDE FILM, SECONDARY BATTERY SEPARATOR, AND SECONDARY BATTERY
To provide a porous polyimide film excellent in tensile breaking strength and air permeability.SOLUTION: A porous polyimide film includes a plurality of holes. An average flatness rate of the holes is 0.1-0.7. A coefficient of variation of distance between adjacent holes is 0.10-0.40. A front surfac...
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Main Authors | , , , , |
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Format | Patent |
Language | English Japanese |
Published |
29.07.2021
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a porous polyimide film excellent in tensile breaking strength and air permeability.SOLUTION: A porous polyimide film includes a plurality of holes. An average flatness rate of the holes is 0.1-0.7. A coefficient of variation of distance between adjacent holes is 0.10-0.40. A front surface and a rear surface are communicated with each other by a range of the holes.SELECTED DRAWING: None
【課題】引張り破断強度及び透気度に優れる多孔質ポリイミドフィルムを提供すること。【解決手段】複数の空孔を有し、前記複数の空孔の平均扁平率が0.1以上0.7以下であり、近接空孔間距離の変動係数が0.10以上0.40以下であり、前記複数の空孔の連なりにより表面と裏面とが連通している、多孔質ポリイミドフィルム。【選択図】なし |
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Bibliography: | Application Number: JP20190238727 |