Laminated paperboard container with absorption resistance means, and blank for constructing same
US4537815A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1984 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Mar 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The drawings and description disclose a heat sealable container for edible oils and other types of oils, and a blank for constructing same, having a laminated wall construction of suitable oil resistant barriers or layers which are compatible with one another insofar as bonding and sealing are concerned. Such wall construction includes central layers of aluminum foil and fluorochemically treated paperboard secured to one another by a suitable adhesive, an ionomer layer, such as Surlyn, formed on each outer paperboard and foil surface, and a layer of thermoplastic material, such as polyethylene, formed on each outer Surlyn surface. As an alternate embodiment in some applications, the Surlyn layer may be omitted from the foil surface, and the outer layer of thermoplastic material may be applied directly to the foil surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.