METAL MATERIAL FOR FOIL YARN AND FOIL YARN AS WELL AS TWIST YARN AND CLOTH FORMED WITH FOIL YARN

To provide a metal material for a foil yarn and a foil yarn as well as a twist yarn and clothing formed with the foil yarn, capable of preventing or suppressing a flexure crack when winding to a core material, in particular a core material having a relatively small outer diameter (for example 1.0 mm or less).SOLUTION: A metal material 1 has a ribbon shape constituting a foil yarn 3 wound in spiral on a foil-shaped core material 2, the metal material 1 being made of aluminum or aluminum alloy, where a width direction cross-section of the metal material 1 roughly forms a rectangular shape, and in view of the width direction cross-section of the metal material 1, a thickness t1 of a width direction central portion 4 is 1.05 time or more and 1.20 time or less relative to a thickness t2 of a width direction end portion 5, and tensile strength is 270 MPa or more and 750 MPa or less.SELECTED DRAWING: Figure 4 【課題】芯材、特に比較的小さな外径（例えば１．０ｍｍ以下）を有する芯材に対して巻き付けた場合における曲げ割れを防止もしくは抑制することのできる箔糸用金属材および箔糸ならびに箔糸を用いて形成される撚糸および布を提供すること。【解決手段】糸状の芯材２に対してスパイラル状に巻き付けられて箔糸３を構成するリボン形状を有する金属材１であって、金属材１は、アルミニウムもしくはアルミニウム合金からなり、金属材１の幅方向断面が略長方形状をなし、かつ、金属材１の幅方向断面で見て、幅方向中央部４の厚さｔ１が、幅方向端部５の厚さｔ２に対して、１．０５倍以上１．２０倍以下であり、引張強度が２７０ＭＰａ以上７５０ＭＰａ以下である。【選択図】図４