Investigation of Stretch and Recovery Property of Weft Knitted Regular Rib Fabric

Weft knitted regular rib (1×1) fabric stretch and recovery property are very tough to control. This project and thesis work have been devoted to studying the effect of variation of stitch length, yarn count, and GSM on the stretch and recovery properties of weft knit regular rib fabric. Three yarn counts, each with 4 level of stitch length, was manufactured for the purpose of this experiment, remaining the machine set up, dyeing and finishing process constant. In this research, it was found that the better stretch and recovery property of regular rib fabric can be produced by using 2.6 mm to 2.65 mm stitch length for yarn count of Ne 28/1 KH and GSM of 195 to 205

Sustainable Natural Printing of Cotton Fabric Without Metal-Based Mordant

Endeavors on scoured and bleached cotton knit fabric to print with natural dyes and natural thickeners were made avoiding the use of detrimental metal-based mordanting agents. Three different natural dye sources (Rose flower-Rosa indica, Teak leaf-Tectona grandis and Tamarind-Tamarindus indica seed husk) extracted in aqueous medium were applied on 100% cotton knit fabric with three different thickeners prepared from the powder of Guar gum-Cyamopsis tetragonoloba, mango seed-Mangifera indica and tamarind seed-Tamarindus indicaon. The printed samples exhibited excellent wash fastness with grading 4–5 for all printed samples, light fastness 7 for tamarind seed husk and tamarind seed, rose flower and tamarind seed printed fabrics and rubbing fastness 4–5 for all printed fabrics. Dye-fiber bond formation was confirmed by FTIR, which revealed phenomena of strong covalent bond between dye and fiber molecules. Environmental impact assessments, chemical oxygen demand (COD) of 0–158 mg/L and total suspended solid (TSS) of 1–55 mg/L indicated that the wastewater generated was safe to discharge to the environment without treatment. Other essential features, determination of K/S value, CIE lab data and durability of printing paste demonstrated successful application of natural dyes and thickeners for printing cotton fabric