Effect of Finishing Treatment on the Residual Change of Properties of Denim Fabric

Abstract

The work reported in this thesis is shows the importance of finishing treatment carried out with denim fabric. It was observed that after finishing the residual change of fabric properties is minimized to almost acceptable level. This has been assessed by washing both grey and finished fabric samples. The thesis work includes (i) a brief account about the machines used in the finishing department of a denim industry, (ii) the effect of finishing on the various properties of denim fabrics, (iii) effect of wash, weave, thread count etc. on the various fabric properties particularly the shrinkage of denim fabric, finally the (iv) inspection of denim fabric was studied to have idea about faults occurred in denim production. All the works, which included collection processing data at primary level, were carried out in a denim industry in the Gazipur district of Bangladesh. It was observed that finishing has substantial impact of the properties of denim fabrics. When both grey and finished fabric samples were washed and found that finishing has significant effect on the residual change of the properties. This was because after the finishing the fabric becomes more compact as a result washing could not change it too much. At the last stage, 152 fabric rolls (16724 yards) were inspected. Inspection was carried out using 4 point system and grading was done as follows; Up to 20 points/100m = Grade A, between 20-30 points/100m = Grade B, between 30-40 points/100m = C and for more than 40 points/100m was rejected. It was found that among all the faults detected, the loose ends and miss pick were the most predominantfabric fault, while smash, broken pick, slub in the warp were reltively less but also important fault.