Multi-layer film with grafted syndiotactic polypropylene adhesion promoting layer
US6703134B1 · kind B1 · utility
11Cited by
20References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 31, 2000 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Sep 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multilayer film has a core layer, such as a biaxially oriented polypropylene layer, and an adhesion promoting layer formed from a graft copolymer of syndiotactic polypropylene and a monomer, such as maleic anhydride, which has hydrophilic functionality. The adhesion promoting layer may be metallized to provide a barrier to oxygen and water vapor. The adhesion promoting layer may also render the surface of the film more receptive to printing inks, laminating adhesives, primeness overcoats and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.