| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag having an engagement piece which is excellent in sealability and engagement strength and inexpensive. SOLUTION: A seal type engagement piece 13 provided with a male member and a female member to be engaged with each other, and an engagement piece 14 of engagement strength keeping type are provided in double at an opening side of a bag body 12, and the adhesive substance 28 is interposed between the male member and the female member of the seal type engagement piece 13. The adhesive substance 28 is polybutene, silicone oil, edible oil, mineral oil, etc., whose kinematic viscosity is <=5000×10<-6> m<2> /s (100 deg.C).
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