Composition for film formation, laminate, film, sheet base material, method for producing composition for film formation, and method for preparing a cellulose dispersion
US9481805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2014 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Apr 19, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/008
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
[Problem] To provide a composition for film formation comprising cellulose fibers, a layered inorganic compound, and a water-soluble polymer, which are each dispersed on nano level, a method for preparing a cellulose dispersion capable of forming a moisture-resistant film containing cellulose nanofibers, a gas-barrier laminate obtained by use of the dispersion, and a packaging material using the laminate. [Solution] A film-forming composition comprising at least cellulose fibers and a swollen inorganic compound is prepared. The method of preparing a cellulose dispersion comprises the steps of oxidizing cellulose, fibrillating the thus oxidized cellulose to prepare cellulose nanofibers, and adding a water-soluble polymer and inorganic particles to the dispersion containing the cellulose nanofibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.