Advantages and disadvantages of survey methods. Survey type. Advantages. Disadvantages. Mail. ⢠Easy and cost efficient. ⢠Response rates are typically low. ⢠Not appropriate for low literacy audiences. ⢠No interviewer, respondents may be mo
Idea Transcript
ADVANTAGES AND DISADVANTAGES ADVANTAGES ARE AS FOLLOWS: high delivery speeds; low yarn production costs (lower than those of ring spinning); elimination of rewinding; low end breakage rates; yarn character similar to that of ring-spun yarn; no wrapping fibers; optically good mass evenness (well suited to knitted goods); better and softer handle than that of rotor-spun yarn; smooth yarn appearance. DISADVANTAGES ARE: low yarn strength; high tendency to snarl; higher number of fibers needed in yarn cross-section; difficulty of keeping spinning conditions constant; high air consumption; increasing unevenness and imperfections with increasing spinning speed, and further reduction in yarn strength.
INDEX
Alternative Spinning Systems Alternative Spinning Processes The Various Spinning Methods Open-end spinning processes The basic principle of yarn formation Electrostatic spinning Air-vortex spinning Friction spinning Operating principle Classification Technological relationships Advantages and disadvantages Dref-2000 Specification of Dref-2000 The Platt Saco Lowell Masterspinner Specification of the Masterspinner The University of Manchester Discspinner Twist spinning Friction (self-twist) method Wrap spinning The False-twist process Air-jet spinning Summary and Outlook References