The Soiling Characteristics of Textile Fibers

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Abstract
The effect of twist on soil retention has been studied for a series of acetate yarns con taining 34 filaments of 3.5 den. filament. With increasing twist, soil retention first in creased to a maximum, and then decreased to values below that of the untwisted yarn. Microscopic examination of the soiled yarn indicated that at 20 turns in. visible soil particles had penetrated to the center of the yarn. whereas at 60 turns in. the soil was located on the exterior surface only.

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