Flexible polymer film with vapor impermeable coating
US4702963A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1982 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Apr 12, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Flexible polymer packaging films having thin films of inorganic coatings deposited thereon to reduce the vapor permeability of the article. Inorganic thin film coatings comprising a composite of two materials are disclosed to confer both substantial transparency and retortability on the overall packaging film structure. The two material film composite involves either sequentially deposited films with the first thin film layer serving as an adhesion layer and the second thin film layer serving as a barrier layer. Alternatively, the two materials may be co-deposited to form a single thin film layer which provides sufficient adhesion to confer retortability on the overall film structure and also functions as relatively impermeable gas and vapor barrier for reducing the vapor transmission rate through the product. Various coated single film articles and dual film laminated articles are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.