PRODUCTION METHOD OF YARNS FOR DENIM PRODUCTS, AND YARNS FOR DENIM PRODUCTS PRODUCED BY SUCH METHOD, FABRIC FOR DENIM PRODUCTS, AND DENIM PRODUCTS

摘要

PROBLEM TO BE SOLVED: To provide a production method of yarns for denim products capable of dyeing inside white and continuously yarns containing nylon fiber as a main constituent fiber with an indigo-based dye.SOLUTION: A production method of yarns for denim products includes: a step of dipping yarns containing nylon fibers as a main constituent fiber in an alkaline dyeing liquid at 35 to 88°C; and a step of oxidizing the indigo-based dye after that, in which the step of dipping the yarns in the dyeing liquid is performed with tension applied to the yarns such that the dye does not permeate to a core part of the yarns, and dyed yarns for denim products have a core part that is inside white, and a core exterior that is dyed with indigo.SELECTED DRAWING: Figure 1