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False Twist Textured Yarns
Principles, Processing and Applications
C Atkinson (Author)
9781845699338, Elsevier Science
Hardback, published 15 March 2012
224 pages
23.3 x 15.6 x 2 cm, 0.48 kg
"A highly recommended reference work for those involved in yarn texturing machine design, production and processing of textured yarns." --Textile Month International
A false twist textured yarn is a continuous filament yarn that has been processed to introduce crimps, coils, loops and other fine distortions along the yarn’s length. These distortions give synthetic yarns such as nylon, polyester and polypropylene improved properties such as stretch, bulk, improved thermal insulation and an appearance similar to natural fibres. This important book summarises the key principles, technologies and process issues in the manufacture of high-quality false twist textured yarns.After an introductory chapter on the development of textured yarns, the book reviews yarn texturing machine designs and twist application methods, including air jet mingling and machine variants for draw textured speciality yarns. It also reviews common process performance and quality problems and how they can be resolved, as well process control, quality assurance and costs. The final chapters look at applications of false twist textured nylon, polyester and polypropylene yarns as well as the future of false twist texturing.Based on the author’s extensive experience in the textile industry, False twist textured yarns is a standard reference on the key technologies and process issues involved in the manufacture of high-quality false twist textured yarns.
Woodhead Publishing Series in Textiles Preface Chapter 1: The development of textured yarns Abstract: 1.1 Artificial silk: an early history 1.2 The arrival of melt spinning 1.3 The melt spinning process 1.4 Achieving desirable fabric properties through texturing Chapter 2: Basic principles of false twist texturing Abstract: 2.1 The concept of false twist texturing 2.2 The false twist mechanism 2.3 Twist application methods Chapter 3: Yarn texturing machine design Abstract: 3.1 The evolution of yarn texturing machines 3.2 Yarn heating and residence time in the primary texturing zone 3.3 Vapour phase heaters 3.4 High-temperature (HT) heaters 3.5 Intermediate-temperature heaters 3.6 Comparison summary of heater types 3.7 Yarn cooling in the texturing zone 3.8 Secondary heaters 3.9 Machine profiles Chapter 4: Yarn twist application methods Abstract: 4.1 Friction disc twisting 4.2 Friction disc materials 4.3 Influence of friction disc twisting parameters on texturing performance 4.4 Friction disc systems advances 4.5 Belt twisting 4 6 Improving yarn elasticity by torque generation (self twist) Chapter 5: Process performance issues in yarn texturing Abstract: 5.1 Friction and surface texture of yarn contact surfaces 5.2 Process instability: tension transients and speed limitations due to ‘surging’ 5.3 Creel design and management 5.4 Package build specifications 5.5 Oil application systems 5.6 Automatic doffing systems Chapter 6: Newer yarn texturing machine designs Abstract: 6.1 Factors affecting machine design 6.2 Examples of new designs Chapter 7: Air jet intermingling in yarn texturing Abstract: 7.1 The concept of air jet intermingling 7.2 The intermingling process 7.3 Downstream process issues Chapter 8: Optimisation of process parameters in yarn texturing Abstract: 8.1 Influence of texturing parameters on yarn characteristics and performance 8.2 Single-position to plant-scale operation 8.3 Resolving process quality issues Chapter 9: Draw textured yarn variants and speciality yarns Abstract: 9.1 Double-density machines 9.2 Machine variants for draw textured speciality yarns Chapter 10: Process control and quality assurance in yarn texturing Abstract: 10.1 In-process controls 10.2 At yarn package doff 10.3 Laboratory controls 10.4 Final product inspection and packing 10.5 Statistical process control Chapter 11: Process costs in yarn texturing operations Abstract: 11.1 Factors affecting costs 11.2 Opportunities for yarn texturing outside low labour-cost countries Chapter 12: End uses for draw textured yarns Abstract: 12.1 Property benefits of textured yarns 12.2 Nylon 12.3 Polyester 12.4 Polypropylene Chapter 13: The future of false twist texturing Abstract: 13.1 Global production trends 13.2 Machine development 13.3 Process integration 13.4 Raw material yarns Index
Subject Areas: Steam engines [TGBN1], Textile & fibre technology [TDH]
