ZIPPER TAPE, PACKAGING BAG WITH ZIPPER TAPE, METHOD FOR PRODUCING PACKAGING BAG WITH ZIPPER TAPE AND PRODUCTION DEVICE THEREFOR

摘要

After engagement of a male belt-like member (21) and a female belt-like member (22) are disengaged, a void portion is formed by punching the female belt-like member (22) with a die (321). The female belt-like member (22) having the void portion and the male belt-like member (21) are re-engaged with each other and fed between a folded base material film (10) that is continuously fed. A male belt-like base and a female belt-like base are heat-sealed. A seal bar (82) heat-seals the base material film (10) to form a bottom seal portion. A side seal bar (84) heat-seals the base material film (10) to form side seal portions. The cutter (75) cuts the base material film (10) in the middle of the side seal portions to produce the packaging bag (1) in which three sides of the bottom seal portion and the side seal portions are heat-sealed.