In recent years, the textile industry has used sodium carboxymethyl cellulose CMC instead of starch as a sizing agent. Practice has proved that CMC sizing not only saves a lot of food and oil, but also is much superior to starch, animal glue and so on. In cotton, silk, wool and chemical fibers, synthetic fibers or blended fabrics, warp yarn with CMC as sticking material has the following advantages: CMC aqueous solution is clear, transparent, uniform, with good stability, with pump circulation or stirring without change can be taken at any time according to production needs. CMC aqueous solution is rich in viscosity and film formation, can form a smooth, wear-resistant, flexible film on the warp surface, can endure the absolute strength of the loom, and provide favorable conditions for high-speed production. The yarn treated with CMC aqueous solution is easy to dry, shiny and soft.
CMC is used as thickener and emulsifier in printing paste. Especially suitable for silk printing paste. The printing color for rayon fabrics such as acetate fibers should contain high boiling solvents, dyes, water and sufficient thickeners. CMC is a thickening agent and emulsifier, printing paste added CMC has the following advantages:
(1) significantly improve the brilliance of printing. Because the general slurry color is water as the medium, CMC moisture absorption is strong, so it can increase the color rate to improve the brightness.
(2) Good permeability. The permeability of CMC pulp is better than that of starch pulp, especially the fabrics that need deep and transparent, such as the torturous flowers of Joachim velvet, which not only eat deep color, but also reduce labor intensity.
(3) easy to desizing, soft texture.
(4) Improve the stability of the color paste. CMC is not easy to moldy, so the color paste is more stable than starch.
(5) strong adhesion. In manual printing, such as nilon fabric is mostly very thin, it is difficult to make it close to the flat plate with general adhesive, so it is often difficult to print with dome, and CMC can be firmly attached to the flat plate, which is conducive to operation.