Manufacture and physical properties of the denim fabrics using Hanji paper yarn as weft yarn

This study aims to develop the Hanji denim fabric with Hanji combination yarn or with the Hanji paper yarn and core spun yarn in a 1:1 ratio as a weft. For the weft yarn, chemical indigo and natural indigo dyestuffs were used. The study developed four kinds of Hanji paper yarns and eight kinds of Hanji denim fabrics. In addition, the study tested the properties of the developed Hanji paper yarns, Hanji denim fabrics, and existing denim fabrics. In regard to the physical properties of yarns, the Hanji paper yarn showed a lower breaking stress but a relatively high breaking strain, and it remained a stable structure with no surface fluff. The Hanji combination yarn improved the weaving ability and had a stable structure form. In the resulting physical properties of the developed Hanji denim fabrics, they had a low apparent specific gravity, stability in dimensional change in washing and drying, a higher chance of commercialization in colorfastness to washing, medium stretchability, a similar drying velocity, and a fast absorption velocity compared to the existing denim fabrics. The study suggests that the Hanji denim fabrics are the good candidate materials for summer product development, since generally the Hanji denim fabrics have cool characteristics with the excellent absorption velocity, drying velocity, and low specific gravity.