PACKAGING BAG HAVING RECTANGULAR BOTTOM

摘要

PROBLEM TO BE SOLVED: To provide a packaging bag having rectangular bottom which has a simple structure and a substantially improved bag manufacturing efficiency. SOLUTION: Both sides of a plastic film 2 are heat sealed to form a side-seal type packaging bag. This packaging bag is a basic form and each of the side portions at the bottom segment of the packaging bag is provided with a triangular heat seal part 5 in its plan view.