Coextruded multilayer film with beta-propylene-based barrier layer
US10259154B2 · kind B2 · utility
0Cited by
7References
14Claims
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Key dates
| Filing date | May 27, 2015 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Aug 18, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/60
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present disclosure provides a coextruded multilayer 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 10 nm to 1000 nm and includes a beta-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 6.2 g-mil/m2/24 hrs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.