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Effect of Washing and Drying of a Cotton Warp on its Characteristics and Weavability

A.P.S. Sawhney

ABSTRACT

In a continuous process, a warp of 100% cotton yarn was uninterruptedly washed in boiling water containing a soap and a wetting agent and dried under a nominal tension/stretch on three (3) steam heated (200F) cans on a conventional "dummy" slasher (i.e., without using a sizing mix) before being wound on to a loom beam. The beam was installed on a slightly modified fly-shuttle loom and the (size-free) washed warp was woven, under almost mill-like speed and conditions, into an open-construction twill fabric. The warp yarn was tested, mainly for its tensile characteristics, before and after the washing and drying and the washed warp was evaluated for its weavability. Results have shown that the tensile breaking strength of the washed/dried yarn is about 20% greater than that of the original, greige yarn and the weavability of the washed warp is satisfactory, although it can not be positively determined at this time that the satisfactory weaving performance of the warp indeed was due to the increased yarn strength alone. About 65 meters of an open twill fabric was woven without a single yarn failure.





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Document last modified April 16, 2003