Ykk Corporation

Jun Kiyohara

Atsushi Ogihara

Yasuharu Yoshimura

Takahiro Fukuyama

Kouta Kido

Takuya Koizumi

Hirofumi Tanikoshi

Yoshio Taira

Masashi Oshita

Koki Shinomiya

Makoto Yamakoshi

Masamichi Yamagata

Kouichi Mikado

Provided is a stopper for a slide fastener and a method for manufacturing a stopper for a slide fastener, which can reduce mutual adhesion and defective rates during the painting process. A coated metal stopper for a slide fastener is provided. The stopper includes a head and a pair of legs extending from the head in a bifurcated manner. Each of the legs has a recess in the center on its inner surface. The ratio of the depth of the recess to the thickness of each leg of the stopper is 3.8% or more and 18.9% or less. Further, the ratio of the length of the recess in a longitudinal direction of the stopper to the length of the stopper in the longitudinal direction can be 13.5% or more and 23.5% or less.

Stopper for slide fastener and method to produce stopper for slide fastener

A copper alloy for fastening wherein the alloy has a structure of a mixture of &#x3b1;-phase and a &#x3b2;-phase; and wherein the alloy has a composition represented by the general formula: CuZnMn, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34&#x2264;a&#x2264;40.5, 0.1&#x2264;b&#x2264;6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b&#x2265;(&#x2212;8a+300)/7, where 34&#x2264;a&#x3c;37.5 and equation (2): b&#x2264;(&#x2212;5.5a+225.25)/5, where 35.5&#x2264;a&#x2264;40.5.

Fastening copper alloy

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Toyama, Japan

Jun Kiyohara