Method for the manufacture of laminated packing material with good gas and aroma barrier properties

摘要

A laminated material for the manufacture of packing containers with good gas and aroma barrier properties, and a method for the manufacture of the laminated material. The laminated material has a base layer (18) and a barrier layer (19) of inorganic material of a thickness of only 50-500 ANGSTROM serving as a gas and aroma barrier. The barrier layer (19) is applied to the base layer (18) by means of vacuum deposition and bonded to the base layer by means of at least one intermediate layer (22) of bonding agent. To facilitate the conversion of the material to packing containers the barrier layer (19) is omitted along such areas (17a and 17b) of the material which are intended to be folded against, and combined with, one another by heat-sealing during the manufacture of the said containers.