| 摘要 |
PROBLEM TO BE SOLVED: To provide a self-supporting bag including a three-dimensional form and excellent in self-supporting ability and appearance, wherein the bag also includes a pour-out port excellent in openability and shape retention and can be appropriately used as a refill bag. SOLUTION: The self-supporting bag 100 is made in a form having gussets 3, 2 folded in the same length on upper and lower parts and both sides heat- sealed by barrel seals 6, 6 in a form with an upper portion narrowed. A projection 11 having both sides and an upper end rim sealed by heat-sealing is provided over an entire upper side of one (front) of creases of front and rear creases of the upper gusset 3. In addition, a cut line 13 for the pour-out port is provided on a corner above the projection 11 and notches 14, 14 are provided at both ends of it. The other crease is heat-sealed with an inverted V-shaped upper gusset back seal 8 with an obtuse-angled interior, and the lower gusset 2 is heat-sealed by a boat-shaped base seal 5.
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