Patent Number: 6,165,574

Title: Packaging laminate including a moisture-sensitive gas barrier layer, a method of producing the packaging laminate, as well as packaging containers

Abstract: A sheet- or web-shaped packaging blank (10) of a laminate including a core layer (11) and a layer of a moisture-sensitive gas barrier material (13), in which the gas barrier layer is disposed between two layers (14, 15) of a moisture-resistant material and is omitted in narrow strip shaped regions (16a, 16b) along both longitudinal edges of the packaging blank. The moisture-sensitive gas barrier layer (13) will by such means be encapsulated between moisture-resistant material and well protected against the action of ambient moisture also along the longitudinal, exposed incision edges of the packaging blank. The moisture-sensitive gas barrier material preferably substantially comprises PVOH and is applied preferably by means of coating in the form of an aqueous dispersion and subsequent drying.

Inventors: Bentmar; Mats (Svedala, SE), Berlin; Mikael (Lund, SE), Leth; Ib (Kavlinge, SE)

Assignee: Tetra Laval Holdings & Finance S.A.

International Classification: B32B 27/10 (20060101); B32B 031/12 (); B29C 047/06 ()

Expiration Date: 12/26/2013