THE MECHANISM AND THE EVALUATION METHOD OF PILLING TENDENCY

For the purpose of improvement of pilling tendency of acritic fiber, many studies have been reported. However they seem not to be successful due to poor testing method at the stage of staple fiber. In this work the new pill-testing method of staple fiber (SF-pill-test) is proposed as a useful technique to estimate the pilling tendency of woven and knitted fabrics. If pill formation and wearing-off process proceeds as shown below, theoretical equation may be introduced. k1: rate constant of pill formation k2: rate constant of pill wearing-off By application of the data from SF-pill-test to the equation, k2 and HWT can be calculated. Improvement of pilling tendency will be expected from larger k2 and smaller HWT.