Estimation of Warp and Weft Crimp in Denim Fabric Using Various Methods

Abstract

For professionals working in the weaving industries worldwide, accurate estimation of warp and weft consumption is a crucial procedure. Both underestimating and overestimating have negative commercial and economic effects. The work presented here is an effort to determine the crimp percentage of denim fabric utilizing a variety of techniques, including marking, set length, and standard crimp tester methods. The investigation was place at a denim weaving facility close to Dhaka, Bangladesh. In this regard, the crimp percentage of denim fabrics with various structures was examined. The set length approach appears to be the most accurate one for calculating crimp%. The study indicates that depending on the fabric construction 10% to 13% crimp is imparted on warp at grey stage, but after finishing it becomes as high as 27% to 30%. This is due to the deliberate length wise shrinkage carried out in the finishing section after weaving. The warp crimp was found to be substantially lower than the warp crimp in denim, as expected, but the completed crimp was significantly greater than the grey crimp. We discovered that warp had a lower crimp% than weft. It's because weaving maintains tension on the warp yarns. Additionally, they are better and stronger yarn than weft. So they stop extending further. Weft yarns, on the other hand, are maintained with low tension and poor quality. in order to stretch farther. Their crimp percentage is higher as a result. Keywords: Crimp percentage, warp crimp, weft crimp, methods to determine crimp, crimp in denim.