TENSILE PROPERTIES OF CHEMICALLY-MODIFIED RING-SPUN AND ROTOR-SPUN COTTON YARNS

The effects of chemical treatments and modifications on the tensile pr operties of ring- and rotor-spun cotton yarns is discussed. The rotor- spun yarns treated with zinc chloride show a higher tenacity at low st retch levels compared to sodium hydroxide, whereas with sodium hydroxi de, the rotor-spun yarns show higher tenacity at higher stretch levels compared with zinc chloride. The aqueous-treated rotor-spun yarns sho w a higher change in tenacity compared to ring-spun yarns. Sodium hydr oxide-treated yarns before resin treatment show a higher retained tena city compared to zinc chloride-treated yarns. The substitution treatme nt after swelling and stretching to 100% shows a higher tenacity than that of the slack substituted yarns. (C) 1995 John Wiley and Sons, Inc .