TT 105 Fall 2006INTRODUCTION TO TEXTILE TECHNOLOGYName: _______________________________Homework Assignment No. 2 – Spun and Filament YarnsReference: Class lecture Due date:September 28, 2006 by 11:00 P.M. by e-mail electronic submission (don’t be late; no extensions)Assignment:Please complete the assignment below. Submission:Once you have completed the assignment send it by e-mail attachment to [email protected]Spun Yarns__ Yarns are used to produce fabric, threads are used to sew parts of fabric together.__ Spun yarns can also be called staple yarns.__ Spun yarns are formed by twisting or wrapping short lengths of fiber around themselves.__ Fibers used in spun yarns can be irregular or regular in length.__ Cotton fibers are irregular in length whereas polyester fibers are consistent in length.__ Spun yarns are less lustrous (shiny) than filament yarns.__ A cotton/polyester spun yarn is more lustrous than a 100% cotton yarn.__ Spun yarns will fall apart if the twist is removed from the yarn.
This is the end of the preview.
access the rest of the document.