Extrusion lamination with registered cold seal adhesive
US9365003B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jun 28, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/70
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention is a method for forming a laminate for use as a flexible packaging wrapper for confections and other food bars. An outer clear film usually oriented polyolefin is printed, preferably reverse printed, with graphics. In a tandem extrusion lamination with registered cold seal process a molten, polyolefin extrudate is applied to bond the outer printed film to an inner film. The inner film is preferably oriented polyolefin and may have a metallized coating of aluminum buried against the extrudate. Finally, a pattern of cold seal adhesive is applied to the inner film surface. The flexible package made with the extrusion lamination process offers improved stiffness, puncture resistance, abrasion resistance and durability over a similar structure produced with adhesive lamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.