Hot Mercerization of Cottons.

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  • Wakida Tomiji
    Department of Home Economics, Gifu Women's University
  • Lee Muncheul
    Department of Textile Engineering, Pusan National University
  • Park Sun Ji
    Department of Textile Engineering, Pusan National University
  • Hayashi Aya
    Department of Home Economics, Gifu Women's University

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Mercerization is one of the most common wet processing of cotton materials to improve the dyeing property. On the other hand, it is known that the treatment brings about a stiff hand. So, hot mercerization is expected to improve the soft hand. Scoured and bleached cotton fiber and fabric were mercerized for 5 min at a temperature of 20°C to 100°C with 20% sodium hydroxide aqueous solution. The X-ray diffraction, apparent dyeing rate and equilibrium dye uptake were measured. Although crystallite of the cotton fiber was transformed from cellulose I to cellulose III with a decreasing of the mercerizing temperature, especially by the treatment under 60°C, the diffraction pattern of the cotton fabric as fiber assembly was not changed to cellulose III.Apparent dyeing rate of the fiber increased with a decrease of the mercerizing temperature, whereas an increase of the rate of the fabric was considerably small compared with that of the fiber. Also, there was no difference among the mercerizing temperature. Therefore, it seems that mercerization of the fiber proceeds easily and transformed from cellulose I to cellulose III, while mercerization of the fabric as fiber assembly is difficult to penetrate sodium hydroxide like a fiber, because of the tight structure of the fiber assembly. Therefore, is clear that mercerization of the fabric is quitely different with that of the fiber. Hot mercerization is not always effective to decrease the KES parameters in shearing and bending behaviors.

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  • 繊維学会誌

    繊維学会誌 58 (8), 304-307, 2002

    社団法人 繊維学会

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