Abstract: A zipper tape is provided including: a first base; a male engagement portion protruding from the first base; a second base; and a female engagement portion protruding from the second base, in which the male engagement portion includes first and second hooks protruding outward, the female engagement portion includes third and fourth hooks protruding inward, the first hook is engaged with the third hook and the second hook is engaged with the fourth hook when the male engagement portion fits inside the female engagement portion, and a force required for causing the male engagement portion to fit inside the female engagement portion is in a range from 30 N/15 mm to 100 N/15 mm.

Abstract: A zipper tape includes a male member and a female member that bite each other. The male member has a head, a projection at the tip of the head, and a recess located at a connecting portion between the projection and the tip of the head. The female member has first and second claw members facing each other, a valley between the first and second claw members, and a pair of protrusions located at the top of the valley. When the male member and the female member bite each other, at least a part of the inner surface of the first claw member of the female member and at least a part of the inner surface of the second claw member of the female member come into surface contact with at least a part of the surface of the head of the male member. The valley of the female member receives the projection of the male member, and the protrusions of the female member fit into the recesses of the male member.

Abstract: A sealing bag with a chuck capable of surely enhancing an easy-to-unseal property of the sealing bag without increasing the size of the chuck and an entire bag and without causing dissolution, flatness and the like at projected parts at the time of bag-making.