The Effects of Dyeing on UV Protection Efficiency of Apparel Fabrics

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  • Shiobara Miyuki
    Graduate School, Kyoritsu Women's University, 2-1 Hitotsubashi 2-chome, Chiyoda-ku, Tokyo 101-8437, Japan
  • Saito Masako
    Graduate School, Kyoritsu Women's University, 2-1 Hitotsubashi 2-chome, Chiyoda-ku, Tokyo 101-8437, Japan
  • Sasaki Masako
    Research Institute of Science and Technology, Tokai University, 1117 Kitakaneme, Hiratsuka-shi, Kanagawa 259-1292, Japan
  • Takeshita Shu
    Research Institute of Science and Technology, Tokai University, 1117 Kitakaneme, Hiratsuka-shi, Kanagawa 259-1292, Japan

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Other Title
  • 布の紫外線防御に与える染色の効果
  • ヌノ ノ シガイセン ボウギョ ニ アタエル センショク ノ コウカ

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Abstract

The ultraviolet radiation (UV) protection efficiency of apparel dyed fabrics of cotton and polyester were evaluated by UPF (UV-B protection index) and APE (UV-A protection index) to investigate the effects of hue and lightness of the fabrics. UV transmittance of fabrics changed along with the thickness of the fabrics. The characteristic spectral transmittance of dyes appeared on the dyed taffeta (thickness: 0.1 mm), but on the dyed fabrics thicker than kanakin (thickness: 0.3 mm) they were less than 10% in all UV region. White fabrics having not enough UV protection efficiency increased their UPF and APE by dyeing and showed good protection efficiency. If the L* values of dyed fabrics were same, UPF is higher in the order of yellow, red, blue and black color. The required conditions for taffeta, thinnest fabric in this research to have enough UV protection efficiency are as follows: L* values of cellulose should be less than 25 regardless of their hue, L* values of polyester should be less than 86 in yellow, less than 67 in red and blue, less than 60 in black color, and addition to those transmittance at 370 nm should be less than 10%.

Journal

  • Sen'i Gakkaishi

    Sen'i Gakkaishi 65 (9), 229-235, 2009

    The Society of Fiber Science and Technology, Japan

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