PRODUCTION OF DEEPLY DYED WOVEN OR KNITTED FABRIC

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a polyester knitted or woven fabric excellent in a deeply dyeing effect. SOLUTION: In subjecting polyester multifilament yarn X1 to false twisting as a feed yarn, a fluid rotation nozzle 4 is used as a twisting body and the yarn is subjected to false twisting under the condition in which false twist coefficient is <=20,000 and draw ratio is <=1.0 and twisting or untwisting tension is not higher than maximum heat shrinkage stress of yarn X1 and the resultant bulk yarn Y1 is mixed with other yarn P to afford a conjugate yarn Q and a yarn consisting essentially of the conjugate yarn is woven or knitted and subjected to alkali treatment to dissolve and remove at least a part of the component A and then dyed to provide the objective deeply dyed woven or knitted fabric. The yarn X1 is undrawn yarn comprising a mixture of 2-30 pts.wt. thermoplastic aliphatic polyester component and 98-70 pts.wt. fiber- forming polyester component having smaller solubility to an alkali aqueous solution than the component A or undrawn yarn comprising the mixture and the component B and the mixture occupies at least one part of fiber surface.