Gas barrier film
US12269240B2 · kind B2 · utility
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Key dates
| Filing date | Jun 1, 2022 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Jan 26, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2429/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A gas barrier film includes a substrate containing polypropylene as a main component, a gas barrier layer on a first surface of the substrate, and a coating layer on the gas barrier layer. Infrared spectroscopy of the first surface indicates a peak intensity (I1) at 1360 to 1390 cm−1 and a peak intensity (I2) at 1440 to 1480 cm−1 in a ratio satisfying the formula: (I1)/I(2)≤1.65.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.