A Comparative Study on the Dyeing Efficiency of Pashmina and Pashmina Blended Knitwear with Acid Dyes

Abstract

A study was conducted to assess the dyeing efficiency of pashmina and pashmina blendedz knitted fabrics. The pashmina, wool and nylon fibers were blended into five different proportions. Each blend was spun into 48 Nm. The yarn thus prepared was processed into interlock knitted fabric on a circular knitting machine. The knitted fabric was divided into two portions. One part of knitted fabrics was subjected to acid dyeing before nylon dissolution, while another part was subjected to dyeing after nylon dissolution. Both the fabric types were evaluated for dyeing efficiency in terms of color values, and fastness properties, besides their mechanical properties. The results indicated that the removal of nylon from the blended fabric resulted in considerable reduction in tensile strength and areal density, however, the elongation properties were not much altered. After nylon dissolution, the color values and fastness properties showed slight reduction, depending upon the blend composition. The SEM images confirmed that the HCl treatment is efficient to remove the nylon from the blended fabric.

Keywords

• blending
• color fastness
• dyeing
• knitting
• luxury fiber
• nylon
• pashmina
• wool