SEAL STRUCTURE OF GUSSETTED BAG AND GUSSETED BAG

摘要

There is provided a seal structure of a gusset bag having an improved impact-proof performance. In a gusset bag provided with a pair of flat surface portions and a pair of side surface portions, a seal portion 20 sealing an opening is formed by bonding inner surfaces of the flat surface portions 2 and inner surfaces of the side surface portions 3, respectively, with a predetermined depth along end edges thereof on the side of the opening of the gusset bag in a state in which the side surface portions are folded inward along folding lines 4, and an impact absorbing seal portion Q 1 is formed on an outer side of the folded lines 2 above intersection points between an inner edge of the seal portion 20 and the folded lines 4.