Packaging coatings, packaging products, and methods of making
US12384932B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2021 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Oct 20, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2553/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided are barrier films, packaging products including barrier films, and methods of making paper/packaging products including barrier films. The barrier films can have antimicrobial properties and can include nanofibrillated cellulose treated with hemp extractives. The nanofibrillated cellulose can be obtained from autohydrolysed hemp pulp. The antimicrobial packaging products or paper products can be made by obtaining pulp fibers from autohydrolyzed hemp hurds, mechanically grinding the pulp fibers to obtain nanofibrillated cellulose, solvent casting the nanofibrillated cellulose films in an aqueous system, treating the nanofibrillated cellulose films with hemp extractives, and applying the hemp extractive treated films to a substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.