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

摘要

PCT No. PCT/SE98/00606 Sec. 371 Date Dec. 2, 1999 Sec. 102(e) Date Dec. 2, 1999 PCT Filed Apr. 1, 1998 PCT Pub. No. WO98/45111 PCT Pub. Date Oct. 15, 1998A 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.