Elastic porous film and article
US10772984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2016 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Nov 22, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The stretchable porous film of the present invention includes voids in a surface thereof, in which: the stretchable porous film has an air permeability measured with an Oken-type air permeability meter of less than 99,999 sec/100 cc; the stretchable porous film has such an extending direction that an air permeability measured with the Oken-type air permeability meter in a state in which the stretchable porous film is extended by 100% becomes less than 60,000 sec/100 cc; and the stretchable porous film has such a pulling direction that when, in a hysteresis test, the stretchable porous film is pulled from a width of 20 mm and an inter-chuck distance of 30 mm to an inter-chuck distance of 60 mm at a pulling speed of 50 mm/min and held for 1 minute, and then the pulling of the inter-chuck distance is released, a residual strain becomes 10 mm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.