Container formed from a container blank and having improved opening properties as a result of stretching heat treatment of polymer layers

US9221228B2 · kind B2 · utility

Assignee

• SIG Technology AG · CH

Inventors

• Michael Wolters · Heinsberg, DE
• Gunther Lorenz · Übach-Palenberg, DE
• Holger Schmidt · Wuppertal, DE
• Jörg Bischoff · Hückelhoven, DE

Key dates

• Filing date: Aug 4, 2011
• Grant date: Dec 29, 2015
• Expiry date: Nov 23, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1352
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Disclosed herein is a container featuring at least one hole, and process for making the same. The container is prepared from a sheet-like composite having (i) a polymer outer layer facing the surroundings; (ii) a carrier layer following the polymer outer layer in the direction of the container interior; (iii) a barrier layer following the carrier layer in the direction of the container interior; (iv) an adhesive layer following the barrier layer in the direction of the container interior; and (v) a polymer inner layer following the adhesive layer in the direction of the container interior. The sheet-like composite is prepared by laminating the individual layers, wherein at least the polymer inner layer or the adhesive layer are stretched during application.