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Title: Dye Non-Uniformity in Textured Yarn Fabrics-A Diagnostic Approach
Authors: Talele, A B
Rao, M V S
Gandhi, R S
Keywords: Barre defect;Crimp contraction force;Dye non-uniformity;K/S value;Textured yarn fabric
Issue Date: Sep-1988
Publisher: NISCAIR-CSIR, India
Abstract: Three possible causes of non-uniform dyeing of textured yarns, namely defective texturing, post-texturing twist variations and pirn winding tension variation in fabric manufacture, were explored. During texturing, the most common sources of faults cause non-uniform/uniform tension variations along the thread line which are subsequently reflected in crimp contraction force (CCF) variation. A Dynafil assessment of CCF variation has been found to be an effective way of detecting potential non-uniform dyeing behavior of textured yarns. In the absence of such sophisticated instruments, faults can also be predicted from simple tests on denier and yarn elongation. A variation of 4% and above in denier brings about non-uniform dyed fabrics in the case of twisted textured yarns. The residual elongation or boiling-water shrinkage is effective in segregating yarns with potential for non-uniform dyeing. The defective textured yarns are much more sensitive to pirn winding tension as compared to the normal textured yarns. In normal yarns, a pirn winding tension variation of about 18 g and above causes dye non-uniformity, whereas in defective yarns, even a variation as little as 4 g brings about weft bars.
Page(s): 128-132
ISSN: 0975-1025 (Online); 0971-0426 (Print)
Appears in Collections:IJFTR Vol.13(3) [September 1988]

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