CTD 261 Lecture Notes - Lecture 17: Starch, Speedstep, Ring Spinning

• School: University of Alabama
• Department: Clothing, Textiles and Interior Design
• Course: CTD 261
• Professor: Amanda Thompson

Document Summary

Spinning systems- produce a yarn based on fiber characteristics of fiber. Surface contour ring spinning- standard by which all spun yarns are rated. Picker: trash, dirt removed and fibers separated. A (cid:862)lap(cid:863) is for(cid:373)ed-flat, fairly uniform layer of fibers. Only used in making certain cotton yarns. Sliver attenuated (drawn out to finer diameter) and twisted. Yarns made with the combing step included are called combed yarns for cottons and worsted yarns for wools and wool blends. Yarns made with the combing step omitted are called carded yarns or woolen yarns for wool and wool blends. Combed yarns are higher of quality, and are more expensive than carded yarns. Combing is not necessary for manufactured fibers like polyester, rayon, or lyocell because with manufactured fibers you can cut to the desired staple length. In a combed polyester/cotton blend yarn, only the cotton portion needs to be combed. A 50/50 polyester/combed cotton yarn is of higher quality than a 50/50 polyester/cotton yarn.