Method for sealing a water-soluble film by applying a sealing solution
US9073294B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2014 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jun 3, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed herein are sealing solutions for sealing water-soluble films, in particular aqueous mixtures including one or more polymeric solvents such as polyols. Aqueous sealing solutions including a relatively dilute solvent for one or more polymeric components of the water-soluble film (e.g., water-soluble polymeric components thereof, such as polyvinyl alcohol (PVOH)) can exhibit one or more benefits, including a reduction in dissolution of the film by the sealing solution and an increase in seal strength. Also disclosed are sealed articles formed with the sealing solutions, for example water-soluble packets containing various liquid or solid compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.