Coextruded multilayer film with propylene-based polymer barrier layer
US10583637B2 · kind B2 · utility
2Cited by
8References
20Claims
0Family size
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Key dates
| Filing date | Jun 25, 2014 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Nov 1, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/726
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present disclosure provides a coextruded multi layer film. The coextruded multilayer film includes a core component having from 15 to 1000 alternating layers of layer A and layer B. Layer A has a thickness from 30 nm to 1000 nm and includes a propylene-based polymer having a crystallization temperature (T1c). Layer B includes a second polymer having a glass transition temperature (T2g), wherein T1c<T2g. Layer A has an effective moisture permeability less than 0.40 g-mil/100 in2/day.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.