Microlayer component for films with improved gas/moisture carrier by controlling crystal lamellae orientation
US10265933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2013 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Jan 9, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/70
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A microlayer component having improved oxygen and water vapor barrier properties (i.e., decreased permeabilities) comprises a barrier microlayer of a semi-crystalline barrier polymer in direct contact with a confining microlayer to promote in-plane crystalline lamellae formation. A microlayer component having a significant amount of in-plane crystalline lamellae may be characterized by at least 1.5× oxygen permeability improvement and at least 1.5× water vapor permeability improvement. A microlayer component having at least 1.5× improvement in oxygen and water vapor permeability may be coextruded and subjected to post extrusion stretching or heat treating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.