1st Edition

Fundamentals of Spun Yarn Technology

By Carl A. Lawrence Copyright 2003
    554 Pages 16 Color & 313 B/W Illustrations
    by CRC Press

    Existing textbooks covering the subject of yarn manufacture largely concentrate on describing the workings of machines. Fundamentals of Spun Yarn Technology presents complete coverage of yarn manufacture and technology and current research findings on the structure and properties of spun yarns. Written by a well-known and respected authority on textile technology, it not only introduces the subject, but it provides students with an advanced understanding of the various process stages.

    The book introduces the rudiments of staple yarn technology, covering the manufacturing process, the raw materials, and processes including short staple, worsted, semiworsted and woollen spinning, doubling, and specialty yarn processes. It also covers the more advanced studies in staple yarn technology, including new developments in fiber preparation technology, carding technology, roller drafting, gilling, ring spinning, open-end rotor spinning, air jet spinning and new research on unconventional spinning systems. This extensive range of topics, along with hundreds of tables and illustrations presented in Fundamentals of Spun Yarn Technology make it a comprehensive and up-to-date treatment of the field.

    The Fundamentals of Yarns and Yarn Production
    Early History and Development
    Yarn Classification and Structure
    Yarn Count Systems
    Twist and Twist Factor
    Fibre Parallelism
    Principles of Yarn Production
    Raw Materials

    Materials Preparation - Stage I: Opening, Cleaning and Scouring
    Mechanical Opening and Cleaning
    Striking from a Bestseller
    Beater and Feed Roller
    Utilisation of Air Currents
    Estimation of the Effectiveness of Opening and Cleaning Systems
    Wool Scouring
    Wool Carbonizing
    Tuft Blending
    Opening, Cleaning and Blending Sequence

    Materials Preparation - Stage II: The Fundamentals of the Carding Process
    The Revolving Flat Card
    Worsted and Woollen Cards
    Sliver Quality

    Carding Theory
    Opening of Fibre Mass
    Carding Actions
    Web Formation and Fibre Configuration
    Fibre Breakage

    Materials Preparation - Stage III: Drawing, Combing, Tow-Top Conversion, Roving Production
    Conversion of Tow-to-Sliver
    Roving Production
    Environmental Processing Conditions

    Yarn Formation Structure and Properties
    Spinning Systems
    Ring and Traveller Spinning Systems
    Open-End Spinning Systems
    Self Twist Spinning System
    Wrap Spinning Systems
    Twistless Spinning Systems
    Doubling Principles
    Economic Considerations

    The Principles of Package Winding
    Basic Principles
    Types of Winding Machines
    Random Wound Cones
    Precision Open-Wound and Close-Wound Packages
    Yarn Tensioning and Tension Control
    Yarn Clearing
    Knotting and Splicing
    Yarn Waxing

    Yarn Tensions and Balloon Geometry in Ring Spinning and Winding
    Circularly-Polarised Standing Waves
    Yarn Tensions in Ring Spinning
    Balloon Profiles in Ring Spinning
    Tensions and Balloon Profiles in the Winding Process

    Fancy Yarn Production
    Classification of Fancy Yarns
    Basic Principles
    Production Methods
    Design and Construction of the Basic Profiles
    Analysis of Fancy Yarns


    Carl A. Lawrence