Films and sheets having microlayers and nanolayers including recycled content
US11945196B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2022 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Feb 2, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2605/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polymeric film, sheet, or extrusion coating is formed as a multilayered structure having at least one A layer and at least one B layer. The polymeric film, sheet, or extrusion coating is able to include at least 30% recycled content resin while also exhibiting improved stiffness and strength relative to films with purely virgin polymers. One embodiment of the present invention further presents improved oxygen barrier properties relative to existing films, sheets, or extrusion coatings. Due to the strong structural properties, the polymeric film, sheet, or extrusion coating allows for the inclusion of recycled content into applications where recycled content has previously not been able to be included, such as flexible food, pharmaceutical, or cosmetics packaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.