Spun Yarn Technology

Spun Yarn Technology provides a comprehensive review of the principles of spun yarn technology. Chapters are devoted to topics on spun yarn technology such as yarn production, properties of yarn, opening and cleaning loose fibers, fiber blending, the process of carding, and roller drafting, doubling, and fiber control. The spinning process, yarn folding, yarn preparation (winding, tensioning, splicing, and steaming and storage), and the kinds of specialty yarn are presented as well. Textile technologists will find the text very useful.

1 Introduction Yarn Continuous Filament Production Continuous Filament Yarn Continuous Filament Tow Spun Yarn Production Drafting Doubling Spun Yarn Types Basic Operations in the Production of Spun Yarns Terminology of Spun Yarns Yarn Thickness Yarn Count The Tex System General Comparison of Continuous Filament and Spun Yarns Fibre Properties2 Opening and Cleaning Automatic Feeders Raw Wool Impurities and Principles of Removal Raw Cotton Impurities and Principles of Removal Principles of Raw Flax Processing Principles of Raw Jute Processing Principles of Spun Silk Processing3 Blending and Mixing Basic Blending Requirements Blending Systems Blending Tolerances Mixing Deficiencies Limitations of Blending and Mixing4 Carding General Carding Objectives Card Clothing Carding Actions Fettling Grinding Setting Carding Faults Wool Card Roller Arrangement Worsted Carding Semi-Worsted Carding Woollen Carding Cotton Card Arrangement Flax Carding Jute Carding5 Roller Drafting, Doubling, and Fibre Control Draft: Calculated and Actual Doublings Combination of Drafts and Doublings The Drafting Zone Back and Front Rollers Beard Fibres Roller Slip Ratch Floating Fibres 'Perfect' Sliver Levelness Random Fibre Distribution 'Perfect' Drafting Fibre End Distribution Drafting Waves Drafting Force Mechanical Defects Reversal of Draft Direction Square-Cut Staple Fibres Methods of Fibre Control Pin Direct Pressure Twist Combined Twist and Direct Pressure6 Autolevelling Radical Autolevelling Conservative Autolevelling Open Loop Closed Loop Combined Loop Closed Loop Design Deviation Reduction Factor Gain/Frequency Response Phase-Lag/Frequency Response Control Loop Characteristics Autoleveller Perturbation Autoleveller Applications Autoleveller Construction Measurement Delay Transmitter Variable Speed Unit Plattdrawframe Autoleveller Wira Autocount7 Combing Basic Objectives Noil Percentage Tear Combing Cycle Machine Comb Types Fibre Feed Cotton Combing Preparatory Processes Comb General Features Combing Cycle Sliver Delivery Applications Woolcombing Preparatory Processes Comb General Features Combing Cycle Worsted Top Finishing8 Package Formation and Drawing Prior to Spinning False Twist Lap or Roll Delivery Can Delivery Balling Head Delivery Roving Twist Flyer Lead Delivery Bobbin Lead Delivery Drawing Worsted Semi-Worsted Carded Cotton Combed Cotton Flax Jute Spun Silk9 The Spinning Process Classification of Spinning Machines General Features of Conventional Spinning Machines Creels Roving Traverse Top Roller Covering and Pressure Underclearers Spindle Drives Change Speed Devices Speed Limitations Variable Speeds Spindle Pitch Lifter Traverse Productive Efficiency Piecening Automatic Doffing Economics General Features of the Spinning Process Yarn Strength Twist Variation and Yarn Appearance Yarn Thickness, Compressibility and Twist Production End-Breakages Twist Formulae Yarn Length Contraction Fine Count Limit Fly Waste10 Fibre Migration and Displacement Characterization of Migration Factors Influencing Displacement Fibre Yarn Process11 Intermittent Spinning Machines Mule Spinning The Woollen Mule Cycle of Operations Delivery Drafting Twisting Backing-Off Winding-On Centrifugal Spinning12 Conventional Frame Spinning Machines Flyer Spinning Ring Spinning Spindle Arrangement Winding-On Revolutions Twist Variation Calculated T