Packaging laminate, method for its manufacturing and packaging container manufactured from the packaging laminate

US8007882B2 · kind B2 · utility

Assignee

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

Inventors

• Nils Toft · Malmö, SE
• Thorbjorn Andersson · Södra Sandby, SE

Key dates

• Filing date: Apr 29, 2003
• Grant date: Aug 30, 2011
• Expiry date: Jun 21, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/139
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A packaging laminate comprising a core layer of paper or carton with a through-going hole, a layer of thermoplastics applied onto one outer side of the core layer, an aluminum foil applied onto the other, inner, side of the core layer and bonded to the core layer by means of an intermediate layer of thermoplastics, the two layers of thermoplastics being sealed to each other within the region of the hole to form a membrane of aluminum foil and thermoplastics, and a first adhesive part-layer applied onto the inner side of the aluminum foil, an intermediate part-layer comprising a material providing barrier properties towards migration of free fatty acids, applied adjacent to the first adhesive part-layer, and an innermost part-layer comprising in the majority a metallocene polyethylene. The packaging laminate has improved sealability properties and provides improved or maintained package integrity and openability to a packaging container manufactured from the laminate, for the purpose of aseptic, long-term storage of for example fruit juice, having an opening arrangement, which at opening removes the membrane of laminated layers of aluminum foil and thermoplastics from the region of …