Modified polyester fiber

Abstract

A modified polyester fiber belongs to a cationic dye room temperature and low temperature dyeable polyester fiber which is prepared by using dimethyl terephthalate and ethylene glycol as basic raw materials, adding Sodium dimethyl sulphonatoisophthalate during ester exchange, and adding aliphatic dibasic acid glycol polyester having 6 to 10 carbon atoms into the ester exchange or polycondensationstage for block copolymerization. The modified polyester fiber has good dyeing performance, excellent spinnability and fiber physical properties, and excellent light fastness, greatly improves the usevalue of a final product, and can be widely used in textile pure spinning or blending with other fibers.

Description

technical field [0001] The present invention relates to polyester fibers having improved properties in terms of dyeability, deep dyeability and light fastness. Background technique [0002] Polyester fibers represented by polyethylene terephthalate fibers are widely used because of their superior performance. However, such fibers, compared with natural fibers such as wool and silk, and semi-synthetic fibers such as viscose rayon and acetate, have deficiencies in dyeing vividness, depth of color, especially deep black shades, and color development. place. [0003] The existence of these defects is generally due to: the polyester fiber dyeing system uses disperse dyes, which often bring insufficient clarity to the dyed article; at the same time, the polyester fiber has a higher ratio than other fibers along the direction perpendicular to the fiber axis. A refractive index of 1.7, which increases the light reflectivity of the fiber surface, thereby increasing the intensity of...

AI Technical Summary

Problems solved by technology

Although these modifications have improved the color brilliance of dyed fabrics, due to the high refractive index of the fibers, no substantial results have been achieved in terms of reducing white reflection and scattering, and improving color depth.