Yarn Twisting Dynamics (The Textile Institute Book Series) - Softcover

Über die Autorin bzw. den Autor

Dr. Menghe Miao is a Fibre and Textile Technology Consultant, having retired from the Commonwealth Scientific and Industrial Research Organisation (CSIRO) as a Principal Research Scientist in materials science and engineering in 2022. He was an Honorary Professorial Fellow in the Department of Mechanical Engineering at The University of Melbourne during 2019-2023. Before joining CSIRO, he was a Research Leader at the Wool Research Organisation of New Zealand (WRONZ) and taught and conducted research on yarn spinning technology at China Textile University and The Hong Kong Polytechnic University, after receiving his PhD from The University of Leeds in 1985.

Dr. Miao's research and publications cover various aspects of the science and engineering of fibre-based materials, including textile manufacturing technology, product engineering, fibre-reinforced composite materials, the production and properties of carbon fibres and carbon nanotube yarns, and textile-structured sensors, actuators, and energy storage devices. He has published over 200 refereed journal papers and research reports for the textile and related industries, as well as two edited books: Engineering of High-Performance Textiles and Carbon Nanotube Fibres and Yarns. Dr. Miao established the fundamental equations of yarn twisting dynamics, which form the basis of this book.

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In a spinning system, twist distribution throughout the yarn-forming zone determines not only the degree of twist in the final yarn, but also how a bundle of fibres evolves into a consolidated yarn. Yarn manufacturing and handling processes can be obstructed or aided by twist blockage. Knowledge of the principles of yarn twisting dynamics will enable researchers and other readers to understand the intricacies of these processes, to improve and innovate. This book presents a first principles approach to the solutions of yarn twisting problems in yarn manufacturing and handling systems.

Part 1 of the book derives the general differential equations of yarn twisting dynamics, describing rotational kinematics and kinetics, and the twist blocking mechanisms of travelling yarns in straight and spatial paths. General solutions to the yarn twisting dynamic equations, including twist wave propagation and twist distributions in idealized systems, are then presented. Yarn tensile, torsional and compressional properties are also discussed based on yarn helical structure models.

In Part 2, the yarn twisting dynamics and twist blockage theories are applied to different spinning systems, 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. The influence of twist insertion methods on the structures and properties of final yarns is discussed based on the insights gained from solution of the yarn twisting dynamic equations.