Laminated porous film, non-aqueous electrolyte secondary battery separator, and non-aqueous electrolyte secondary battery
US10153468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2015 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Apr 20, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
As a laminated porous film realizing excellent handling properties in a low-humidity environment, a laminated porous film in which a layer containing a polymer is laminated on at least one side of a polyolefin porous film, satisfying the following (1) and (2) is provided. (1) When the laminated porous film cut into a rectangle having a length on a side parallel with a machine direction of 60 mm, and a length on a side parallel with the direction perpendicular to the machine direction of 40 mm is left still for 1 hour in an environment at a temperature of 23° C. and a humidity of 50%, a lifting amount of the side parallel with the direction perpendicular to the machine direction is 8 mm or more. (2) When the laminated porous film cut into a rectangle having a length on a side parallel with a machine direction of 60 mm, and a length on a side parallel with the direction perpendicular to the machine direction of 40 mm is left still for 1 hour in an environment at a temperature of 23° C. and a humidity of 5%, a lifting amount of the side parallel with the machine direction is 12 mm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.