Yarn Twisting Dynamics

Yarn Twisting Dynamics presents the general differential equations of yarn twisting dynamics, describing rotational kinematics and kinetics, along with the twist blocking mechanisms of traveling yarns in straight and spatial paths. General solutions to yarn twisting dynamic equations, including twist wave propagation and twist distributions in idealized systems are also presented. Yarn tensile, torsional, and compressional properties are discussed based on yarn helical structure models. Users will find this book to be a first principles approach to yarn twisting problems in yarn manufacturing and handling systems.

Other sections cover yarn twisting dynamics and twist blockage theories, including conventional ring spinning, modified ring spinning, additive spinning (i. e. , open-end spinning), constant and periodic false-twisting, rub-condensing (i. e. , roving and slubbing production), false twist texturing, and carbon nanotube yarn production systems.

Part I: Foundations of yarn twisting dynamics
1. Twist and twist-insertion systems
2. Mechanical properties of twisted yarns
3. Equations of yarn twisting dynamics
4. Twist wave propagation
5. Solutions for simplified twisting systems
6. Mechanics of yarn twist blockage

Part II: Twisting dynamics of particular spinning systems
7. Conventional ring spinning
8. Modified ring spinning systems
9. Rotor spinning
10. Friction spinning
11. Air-jet spinning
12. Air vortex spinning
13. Hollow spindle wrap spinning
14. Self-twist yarns
15. Rubbing consolidation

Part III: Novel yarn structures
16. Carbon nanotube yarns
17. Twist-coiled yarn artificial muscles