Provided is a molded component for slide fasteners, which has a good balance between mechanical strength and platability. This molded component for slide fasteners is made of a resin composition that contains 30-50% by mass of a polyamide and 50-70% by mass of reinforcing fibers, with the total of the polyamide and the reinforcing fibers being substantially 100% by mass. In the resin composition, the polyamide has a weight average molecular weight of 30,000-80,000, and 50% by mass or more of the polyamide is composed of an aliphatic polyamide.

Stringers without fastener tape have continuous fastener elements and have element fixing members wherein the fastener elements are sewn together by a sewing thread. The element fixing members are inserted between upper and lower leg sections of the fastener elements. The sewing thread comes in contact with and straddles the upper and lower leg sections of each fastener element and pierces the element fixing members between the fastener elements. As a result of such stringers without fastener tape, the fastener elements can be held and the weight and cost of an article with a slide fastener can be reduced.

Stringers without fastener tape have continuous fastener elements and have element fixing members wherein the fastener elements are sewn together by a sewing thread. The element fixing members are inserted between upper and lower leg sections of the fastener elements. The sewing thread comes in contact with and straddles the upper and lower leg sections of each fastener element and pierces the element fixing members between the fastener elements. As a result of such stringers without fastener tape, the fastener elements can be held and the weight and cost of an article with a slide fastener can be reduced.

A wide top narrow bottom type double-layer zipper that the width of the interlocked bottom interlocking coils is smaller than the width of the interlocked top interlocking coils; the top interlocking coils and the bottom interlocking coils have the same spiral pitch; the top and bottom layers of the wide top narrow bottom type double-layer zipper are vertically aligned and sewed; the diameter of the polyester coils extend spirally around the respective filler cords of the respective bottom interlocking coils monofilament is about 0.02 mm0.1 mm smaller than the diameter of the polyester coils monofilament that extend spirally around the respective filler cords of the respective top interlocking coils; the engaged tooth line of the top interlocking coils at the top cover panel of the zipper slider and the engaged tooth line of the bottom interlocking coils at the bottom cover panel of the zipper slider exhibit a non-superimposed relationship.

A wide top narrow bottom type double-layer zipper that the width of the interlocked bottom interlocking coils is smaller than the width of the interlocked top interlocking coils; the top interlocking coils and the bottom interlocking coils have the same spiral pitch; the top and bottom layers of the wide top narrow bottom type double-layer zipper are vertically aligned and sewed; the diameter of the polyester coils extend spirally around the respective filler cords of the respective bottom interlocking coils monofilament is about 0.02 mm0.1 mm smaller than the diameter of the polyester coils monofilament that extend spirally around the respective filler cords of the respective top interlocking coils; the engaged tooth line of the top interlocking coils at the top cover panel of the zipper slider and the engaged tooth line of the bottom interlocking coils at the bottom cover panel of the zipper slider exhibit a non-superimposed relationship.

A stop member may include: a main body fixed to both fastener tapes of a slide fastener, the main body including a first portion arranged on first tape surfaces of the fastener tapes and a second portion arranged on second tape surfaces, the second tape surfaces being opposite to the first tape surfaces; and at least one leg fixed to at least one fastener tape and coupled to the first portion of the main body, the leg extending away from the main body and covering a first region of the first tape surface of the fastener tape. The second tape surface may include a second region that is opposite to the first region of the first tape surface and includes a bare region of the second tape surface. The bare region may extend from a peripheral wall surface of the second portion toward a terminal end of the leg.

A stop member may include: a main body fixed to both fastener tapes of a slide fastener, the main body including a first portion arranged on first tape surfaces of the fastener tapes and a second portion arranged on second tape surfaces, the second tape surfaces being opposite to the first tape surfaces; and at least one leg fixed to at least one fastener tape and coupled to the first portion of the main body, the leg extending away from the main body and covering a first region of the first tape surface of the fastener tape. The second tape surface may include a second region that is opposite to the first region of the first tape surface and includes a bare region of the second tape surface. The bare region may extend from a peripheral wall surface of the second portion toward a terminal end of the leg.

A clasp for a jewelry system has two arms and a sleeve that can slide to a position covering at least portions of both arms. In this position, the sleeve urges the clasp from an un-locked state towards a locked state.

A monofilament having, in cross section, a first width and a second width being orthogonal to the first width and being greater than the first width is helically wound about the circumference surface of the mandrel. Each helical unit included in the configured helix of the monofilament includes a pair of legs, a first coupling portion coupled between said pair of legs, and a second coupling portion coupled between one leg of said pair of legs and the other leg of a pair of legs in an adjacent helical unit. The second width of said first coupling portion is oriented along the axial direction of the mandrel. The first coupling portion in each helical unit in the helix is pressed such that the second width of the first coupling portion is widened in its width direction, thereby forming an engagement head.

A plurality of warp threads includes total N adjacent tightening threads each repeats crossing over N second legs at a side of the first tape-surface and crossing over the weft thread at a side of the second tape-surface so as to tighten the coil-shaped element to the weft thread. Said N indicates a natural number equal to or greater than 2. Each tightening thread includes an exposed portion that crosses over the weft thread and is exposed at a side of the second tape-surface. As the N adjacent tightening threads extend, the respective exposed portions of the tightening threads appear at a side of the second tape-surface one-by-one alternately or one-by-one sequentially.