A STUDY ON DYEING PERFORMANCE ON MULBERRY SILK WASTE/WOOL BLENDED FABRIC
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Date
2011
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PAU Ludhiana
Abstract
The present study entitled “A study on dyeing performance on mulberry silk waste/wool blended fabric” was carried out to analyse the effect of dyeing on mulberry silk/wool blended fabric. Cold reactive, hot reactive, leveling acid and milling acid dyes were selected for the study. Optimum conditions for dyeing the mulberry silk waste/wool blended fabric with cold reactive dye was, pH 7 for 60 minutes at room temperature using 4 percent dye concentration. Whereas 5 pH for 70 minutes at 90°C with 3 percent dye concentration was considered optimum for dyeing the fabric with hot reactive dye. In case of levelling acid dyeing optimum dyeing conditions were, pH 5 for 80 minutes at 90°C using 4 percent dye concentration. In order to optimize the dyeing condition for milling acid dye best results were obtained at 7 pH with dyeing time 80 minutes, temperature 90°C and 4 percent dye concentration. Physical and mechanical properties like crease recovery angle and tensile strength increased after dyeing the fabric with cold reactive dye, this was followed by hot reactive dyed fabric. Whereas fabric dyed using milling acid dye showed better GSM, thickness, drapability and elongation. However no change was observed on the cover factor after dyeing. Light fastness grade was excellent for the fabric dyed using milling dye and good. Fabric dyed using hot reactive dye showed excellent grade for wash fastness in terms of colour change and no staining on both wool and silk fabrics. The fabric dyed with milling dye exhibited good to excellent grade for dry rubbing in terms of colour change and negligible staining on adjacent fabric, for wet rubbing good grade in terms of colour change and slight staining was observed on adjacent fabric. Hot reactive dyed fabric showed better results for perspiration fastness as compared to the other dyed fabrics. The perspiration grade of hot reactive dyed fabric was excellent for colour change in acidic medium and slight staining on both wool and silk fabrics. When the dyed fabric was kept in the alkaline medium the colour change was ranged between good to excellent, negligible staining was found on wool fabric and slight staining was observed on silk fabric.
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