Film comprising polylactic acid polymer suitable for graphic articles
US11981810B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Mar 25, 2020 |
| Grant date | May 14, 2024 |
| Priority date | — |
| Expiry date | Jul 6, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An article is described comprising a first film layer comprising polylactic acid polymer (semicrystalline polylactic acid polymer; amorphous polylactic acid polymer; or a mixture thereof); a second (e.g. polyvinyl acetate) polymer having a Tg of at least 25° C.; plasticizer. In some embodiment, the film layer further comprises inorganic pigment and/or hydrolysis stabilizer. In other embodiments, the film has a net melting endotherm, ΔHnm1, of less than 10 J/g. Also described are methods of making a graphic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.