There is provided an element for a fastener chain. The element includes a body portion fixed on a core portion of a tape, a neck portion, a pair of shoulder portions, an engaging head portion, and a pair of groove portions. As viewed in the width direction, at least one of the pair of shoulder portions and the pair of groove portions is configured to be inclined with respect to a reference direction, which is an extending direction of the core portion on which the body portion is fixed.

The invention discloses a flat bottom resin zipper, which injects resin chain teeth onto a core wire or a chain cloth. Each resin chain tooth has a sewing thread slot on the top and a chain cloth embedding groove on the bottom. Then sew the entire resin chain teeth to the chain cloth, so that the sewing threads are tightened in the sewing thread slots, and the chain cloth is embedded in the chain cloth embedding grooves, forming a double fixed structure of injection molding and sewing thread sewing. Afterwards, the inner side of the chain cloth is folded back to form a flat bottom zipper with only the chain cloth on one side of the zipper without any protruding resin chain tooth, which can be used as an anti-pinch zipper or an invisible zipper.

The invention discloses a flat bottom resin zipper, which injects resin chain teeth onto a core wire or a chain cloth. Each resin chain tooth has a sewing thread slot on the top and a chain cloth embedding groove on the bottom. Then sew the entire resin chain teeth to the chain cloth, so that the sewing threads are tightened in the sewing thread slots, and the chain cloth is embedded in the chain cloth embedding grooves, forming a double fixed structure of injection molding and sewing thread sewing. Afterwards, the inner side of the chain cloth is folded back to form a flat bottom zipper with only the chain cloth on one side of the zipper without any protruding resin chain tooth, which can be used as an anti-pinch zipper or an invisible zipper.

There is provided an element for a fastener chain. The element includes a body portion fixed on a core portion of a tape, a neck portion, a pair of shoulder portions, an engaging head portion, and a pair of groove portions. As viewed in the width direction, at least one of the pair of shoulder portions and the pair of groove portions is configured to be inclined with respect to a reference direction, which is an extending direction of the core portion on which the body portion is fixed.