The Optimal ratio of spandex using in weft knit

Abstract

The study of optimal ratio of spandex using in weft knit which have a result of fabric stretch and fabric growth of weft knit made of circular machine 24 gauge 78 feed. The cotton yarn 40 Ne and spandex yarn 40 denier by half feed on 4 levels of 6, 8, 10 and 12 percent. Physical testing such as weight square meter, percent spandex, percent stretch, percent growth before/after process bleaching dyeing. From the results, it was found that ratio using spandex at 10 percent has percent fabric growth the lowest growth both before and after process bleaching dyeing.