Abstract: A bag body provided with a zipper tape in which both openability by hands and openability by an automatic machine are improved while ensuring the opening strength on the contents side in order to prevent the leakage of the contents is provided. A zipper tape is configured such that the distance A between a front end part of a female part on the non-opening side and a top part on a protruded part on the opening side, the distance B between a front end part of a female part on the non-opening side and a front part opposing to a stripe-shaped base in a protruded part on the non-opening side, and the angle C formed by a protruded part on the non-opening side and a side surface of a shaft part connecting therewith satisfies the relationship represented by the following formula: A?B?0.20 mm and 50°?C?85°.

Abstract: A packaging bag has a zipper including a pair of male member and a female member that are engageable with each other. The male member includes: a belt-shaped male base element provided on a packaging bag body; and a male engaging portion projecting from the belt-shaped male base element. The female member includes: a belt-shaped female base element located at a position opposed to the belt-shaped male base element; and a female engaging portion projecting from the belt-shaped female base element, the male engaging portion and the female engaging portion being disengageably engaged to form an engaging portion. The belt-shaped male base element and the belt-shaped female base element are made of a resin of which tensile modulus of elasticity is in a range of 700 MPa to 1600 MPa. The engaging portion is made of a resin of which tensile modulus of elasticity is in a range of 110 MPa to 560 MPa.

Abstract: A packaging bag has a zipper including a pair of male member and a female member that are engageable with each other. The male member includes: a belt-shaped male base element provided on a packaging bag body; and a male engaging portion projecting from the belt-shaped male base element. The female member includes: a belt-shaped female base element located at a position opposed to the belt-shaped male base element; and a female engaging portion projecting from the belt-shaped female base element, the male engaging portion and the female engaging portion being disengageably engaged to form an engaging portion. The belt-shaped male base element and the belt-shaped female base element are made of a resin of which tensile modulus of elasticity is in a range of 700 MPa to 1600 MPa. The engaging portion is made of a resin of which tensile modulus of elasticity is in a range of 110 MPa to 560 MPa.