The wicking properties of porous polyester, Coolmax and conventional polyester rotor yarns were tested with the capillary flow of a colored liquid and the height was recorded against the time. The relations of material structure, temperature, and yarn count factors to wicking properties were discussed. Results showed that: the moisture conduction of porous structure yarns were best of all yarns; Higher temperature results the faster of wicking speed, and is especially for porous polyester; The finer Coolmax and conventional polyester rotor yarns are of faster wicking speed, but this rule is not distinct for porous structure polyester.
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