55—SOME FACTORS AFFECTING THE HAIRINESS OF WORSTED-SPUN YARNS

Further experiments are reported on the hairiness of worsted-spun yarns, chiefly of mohair. The effect of some fibre physical properties on the hairiness of man-made-fibre blended-fibre yarns was also studied. Leading hairs are predominant among the singles yarns spun by different drafting systems, although their proportions may vary. The hairiness of yarns spun by different drafting systems is compared. The Ambler Superdraft Uniflex spinning machine produced the least hairy Courtelle acrylic-fibre yarns from the different drafting systems studied. An increase in the drafting angle and an increase in traveller weight reduced the yarn hairiness, and there appeared to be a critical value of flume-setting, above and below which yarn hairiness increased. The Uniflex spinner appeared to produce at least equally lean, if not leaner mohair yarns, both singles and two-fold, than did the flyer system.