Ykk Corporation

Yui Miyawaki

Isamu Michihata

Yoshinori Kojima

Hayuru Tanaka

There is provided a side fastener chain. A plurality of elements are fixed on each of opposing edge portions of a pair of fastener tapes at a predetermined pitch. The elements include a base portion and a head portion. A ratio (Rt) of the sum dimension of a first partial thickness, which is measured from an upper surface of each element to an upper surfaces-side apex of the respective edge portion, and a second partial thickness, which is measured from a lower surface of the element to a lower surface-side apex of the edge portion, to a thickness of the element satisfies the following equation: 40%&#x2264;Rt. A ratio (Rtl) of the thickness of the element to the entire length of the element satisfies the following equation: 0&#x3c;Rtl&#x3c;60%.

Slide fastener chain and slide fastener

[Problem] To provide a slide fastener chain and a slide fastener, which have a small curvature radius and which have flexibility enabling the slide fastener chain and the slide fastener to be smoothly bent. [Solution] A slide fastener chain () comprises: a pair of fastener tapes (); and elements () affixed to the facing edges () of the fastener tapes () at a predetermined pitch. The slide fastener chain () is characterized in that: the elements () each have bases () affixed to a fastener tape () and each have heads () protruding from the bases () and engaging with facing elements (); and the thickness (t) and pitch (p) of the elements () satisfy the following expressions (1) and (2).

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Toyama, Japan

Yui Miyawaki