Lidstock laminate
US6627273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Mar 13, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A packaging laminate useful as a lidstock comprises first and second films, and an image between the first and second films. The first film comprises a sealant layer forming the inside surface of the first film. The first film has a free shrink at 220° F. in at least one direction of at least about 7%. The second film comprises an outside layer forming the outside surface of the second film. The outside layer comprises at least about 40% by weight of the outside layer of one or more relatively high-melt polymers each having a melting point at least about 25° F. higher than the lowest melting point polymer of the sealant layer. The second film has a free shrink at 185° F. of no more than about 10% in each of the machine and transverse directions. The outside surface of the first film is directly laminated to the inside surface of the second film. The first film has an oxygen transmission rate greater than the oxygen transmission rate of the second film. The laminate has an oxygen transmission rate of no more than about 100 cubic centimeters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.