Moisture barriers for paper materials
US11873607B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2019 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | May 12, 2042 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H27/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided herein is a tobacco packaging material, comprising a paper material coated with at least one polymer layer. The polymer layer comprises at least one repulpable polymer, and wherein the tobacco packaging material has a water vapor transmission rate (WVTR) that is at least 90% lower than the paper material. Further provided is a tobacco package comprising the tobacco packaging material, wherein the tobacco package is substantially free of any foil inner liner or polypropylene film. Further described is a method for making the tobacco packaging material, comprising extrusion coating at least one repulpable polymer onto a paper material to form a polymer layer, and optionally further depositing at least one atomic layer deposition (ALD) layer that comprises a metal oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.