天然彩棉回潮率改善.ppt

Research on the improvement of the moisture absorbency of naturally self-coloured cotton H. Gu Abstract Naturally self-coloured cotton fibers are not ideal for direct use because of their low moisture absorbency. Warm water and NaOH solutions with various densities were used to treat a green cotton. The moisture absorbent ability of the treated cotton was tested. The increase of the moisture regain of the treated cotton was obvious; this is considered to be the result of reducing the content of fat and lignin in the fiber. Introduction The disposal of the drainage after dyeing and finishing in the textile production causes environmental pollution. Natually self-coloured cotton is considered to be disease-resistant during its growth; no traditional pesticides are needed. Coloured cotton is not a new concept; its cultivating history dates back 5000 years. The cultivation of the plant nearly ceased for a long period of time because of its poor fiber quality and low yield. Breeding research over the last 20 years has led to improvement in yields, fiber quality and colour intensity. Shorter,weaker,finer than regular white cotton. China began its research work on coloured cotton in the 1990s. To date, plantations have been run successfully in Sichuan, Gansu, Henan, Xinjiang, Hainan. Clours: brown, green, purple, grey, orange. In 30 years, the coloured cotton yield in China would amount to 30% of its total cotton output. Terry fabrics, shirts and inimate apparels, which are worn next to the skin. But uncomfortable. Towels made of coloured cottons feel harsh, and their moisture absorbency is not as good as expected. the csuse is the substances such as fat, pectin and lignin, contained in the coloured cotton fibers. For elimination of these substances, warm water and NaOH solution treatment was carried out. Evaluations of treated green cotton were made. An improvement of the moisture absorption after