A Novel Chemical Finishing Process for Cashmere/PVA-Blended Yarn-Made Cashmere Fabric

摘要

Cashmere fiber has to be blended with either nylon or water-soluble Polyvinyl alcohol (PVA) as a carrier fiber for spinning on worsted spinning system. The spun yarn is used for producing high--end fashion fabrics. The nylon or PVA portion is then removed from the fabric by treating with hydrochloric acid or hot water. The PVA based process is considered eco-friendly as compared to nylon-based process. However, the whiteness and handle of such fabric is inferior as compared to cashmere fabric produced from nylon-based process. This study attempts to improve the whiteness and handle of the fabric by using dilute sulfuric acid in place of hot water to remove PVA. The fabric produced from newly developed process shows improvement in whiteness index (28%) and handle (20%) than fabric of hot water-based process. It exhibits similar handle like that of cashmere fabric produced from nylon-based process. The new process uses only mild concentration of acid and can be considered as eco-friendly as hot water-based process. The sulfuric acid facilitates easy dissolution of PVA from the fabric and prevents the redeposition of the same.%羊绒纤维必须配合与尼龙或水溶性PVA作为对精纺纺纱系统紡载体 纤维.纺出的纱线用于生产高档时装面料.尼龙或PVA部分然后用 盐酸或热水处理织物的去除.相比尼龙的过程,PVA的过程被认为 是环保的.然而,这种织物的白度和手柄差相比,是羊絨面料生 产的尼龙为基础的进程.本研究试图改善白度和处理的织物通过 用稀硫酸代替热水除去的PVA .新开发的过程中产生的织物显示 了比热水为基础的进程的纤维的白度指数(28%)和手 柄(20%)的改善.它表现出类似的手柄一样,羊絨面料生产基 于尼龙的过程.新方法使用只有轻微的酸的浓度可作为环保型水 基过程热硫酸促进PVA易溶解于织物和预防同沉积.