Packaging laminate for a retortable packaging container

US7195803B2 · kind B2 · utility

Assignee

• Tetra Laval Holdings & Finance S.A. · CH

Inventors

• Thorbjorn Andersson · Södra Sandby, SE
• Tom Kjelgaard · Lund, SE
• Ib Leth · Strada a scorrimento veloce Trapani-Marsala, SE

Key dates

• Filing date: Oct 1, 2001
• Grant date: Mar 27, 2007
• Expiry date: Jul 18, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31891
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The disclosure relates to a packaging laminate for a retortable packaging container comprising a core layer (11), outer, liquid-tight coatings (12 and 13) and a gas barrier (14) disposed between the one coating (12) and the core layer (11). Between the gas barrier (14) and the core layer (11), there is a layer (16) of a lamination or sealing agent of such a nature that the lamination or sealing agent has a melting point which is higher than the maximum temperature to which the retortable packaging container is to be subjected during a normal heat treatment in a retort. The lamination or sealing agent in the layer (16) may, for example, be a polypropylene with a melting point of above 130° C.