Polyester fiber is widely welcomed by the market due to its many advantages, but its molecular structure is tight, crystallinity and orientation are high, and it lacks polar groups, which causes problems such as difficult dyeing, high cost, and heavy pollution.
Improve dyeability by modifying polyester fiber. In the polymerization process, the third component with an anionic group is added, the most widely used is the addition of sodium dimethyl isophthalate sulfonate and sodium dimethyl terephthalate sulfonate (SIPM). High temperature and high pressure cationic dyes can dye modified polyester fibers (CDP). Since the third component is a rigid benzene ring structure, CDP still needs to be dyed under high temperature and high pressure conditions of 110-130 degrees. In the polymerization process, a small amount of the third component SIPM and the fourth component polyethylene glycol PEG are added to prepare an atmospheric boiling dyeable cationic dyeable modified polyester fiber (ECDP). The flexible segment of polyethylene glycol makes the molecular structure of the fiber looser, and cationic dyes can be dyed under normal pressure boiling conditions. Good dyeability and high dye uptake!
Jinxia brand cationic dyeable modified polyester yarn is added with a new fourth component, which has the performance of deep dyeing with cationic dyes at normal pressure and low temperature, and the dyeing saturation value is higher than 3.5. It is a low-carbon, environmentally-friendly and energy-saving product with low temperature feasibility for dyeing and finishing. Under normal pressure 95-100 degrees, dyeing with cationic dyes has high fixation rate, high dye utilization rate, low dyeing wastewater discharge, and dye uptake rate of more than 96%. The dyed color is bright, and the color fastness is high. After reduction and cleaning, the original color and luster can be maintained after setting, and it has excellent wet fastness and rubbing fastness. The hand feels soft, and the original hand feel can be maintained after dyeing and finishing. Cationic dyeable polyester yarn_jinxia new material
