Optimization of application process for polyester leveling and repairing agents
Aiming at uneven dyeing problem of polyester fabrics in the process of overflow dyeing,leveling agent is often used for prevention,and repair agent is used for back repair.The effects of leveling agent and repair agent on the color and leveling property of the fabric after dyeing,the effects on the migration and retarding property of disperse dye,and the effects on the color fastness of the fabric after dyeing were analyzed,and the use method was optimized.The results show that the dosage of leveling agent or repairing agent is in the range of 0-3.0 g/L,the change of K/S value is less than 0.2,and the color difference CIE DE is less than 0.4 compared with the color of the dyed fabrics without additive;the dosage of leveling agent and repairing agent have no obvious effect on the color of fabrics;they have good leveling,migration and slow dyeing properties for disperse dyes,and the repairing agent has better properties than leveling agent;there is no effect on the color fastness of the fabrics after dyeing with disperse dyes;the optimal dosage of leveling agent YDL is 1 g/L,and the optimal dosage of repairing agent CR is 0.5 g/L;when the fabrics are easy to appear uneven dyeing problems,the leveling agent can be replaced with the repairing agent.
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