Wound body of porous film, and manufacturing method thereof
US10059085B2 · kind B2 · utility
1Cited by
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7Claims
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Key dates
| Filing date | Aug 28, 2015 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A roll is made of a porous film in a belt-like shape, the porous film having a width of not smaller than 20 mm. In a case where a roughness along a width direction of an outermost surface of the roll is measured at 1 mm intervals across an entire width of the outermost surface, a difference between a maximum roughness value and a minimum roughness value in a distance of 20 mm in the width direction of the outermost surface is less than 25 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.