Patent ID: 6554182
Filing Date: 2003-04-29
Classification: B31B,B65D

Abstract:
A packaging container for the cold storage of liquid foods, and for retaining superior flavor and aroma properties in the packed product, the container being of the type which is produced by fold forming and sealing of a planar, substantially rectangular or quadratic packaging container blank including one or more side wall panels, top panels and bottom panels, for the formation of a tubular blank with a longitudinal overlap joint between first and second longitudinal edges of the packaging container blank, said tubular blank thereafter being given the desired bottom and top closures by fold forming and sealing of the bottom and top panels, respectively, of the packaging container blank, said packaging container blank being produced from a laminated packaging material including a core layer of paper or paperboard, an outer, aroma barrier layer of PET and a gas barrier layer disposed between the core layer and the aroma layer, the packaging container blank being fold formed and sealed such that all contact surfaces vis-a-vis the packed product on the inside of the filled and sealed container consist of the outer layer of PET, wherein said first longitudinal edge is skived and double folded outwardly against an outer surface of said first longitudinal edge; anda hot melt glue seal disposed between said skived and double folded edge of said first longitudinal edge and an inner surface of said second longitudinal edge, said hot melt glue seal retaining good adhesion and tightness properties during storage in cold storage temperatures of about between 4-8Â° C. and having a softening temperature of about between 80-100Â° C., said hot melt glue being based on a copolymer of ethylene and vinyl acetate in a composition with a tackifying rosin ester resin.