| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin bag with a zipper wherein moisture of a packaged object is kept when the object is heated in the bag in a microwave oven or the like so as to keep a taste and a feel of food as much as possible, appropriate permeability is embodied to avoid breakage and the bag is appropriate for re-storing excess food. SOLUTION: A base piece 4 formed at a base of a zipper 3 is plane-stuck to an internal face of an opening 2 of a bag body 1 over a required width with adhesive part 5 of an appropriate length left at a distance in a lengthwise direction. An easy-to-peel weak adhesive part 6 which peels due to an internal pressure of the bag body 1 to form a vent path is provided between the adhesive parts 5 which are plane-stuck over a required width at a distance.
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