False Twist Textured Yarns

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.- Discusses the development of textured yarns, the basic principles of texturing and the process of false twist texturing- Summarises the key principles, technologies and process issues in the manufacture of high-quality false twist textured yarns- Chapters include texturing machine design, applications of textured yarns and the future opportunities for false twist texturing

Dr Colin Atkinson is a leading consultant to the textile industry in issues affecting textured yarns with over 30 years' experience. He is a former Managing Director of Intex Yarns Limited and Technical Director of Rieter-Scragg Limited, one of the world's leading manufacturers of yarn texturing machinery.

Woodhead Publishing Series in TextilesPrefaceChapter 1: The development of textured yarnsAbstract:1.1 Artificial silk: an early history1.2 The arrival of melt spinning1.3 The melt spinning process1.4 Achieving desirable fabric properties through texturingChapter 2: Basic principles of false twist texturingAbstract:2.1 The concept of false twist texturing2.2 The false twist mechanism2.3 Twist application methodsChapter 3: Yarn texturing machine designAbstract:3.1 The evolution of yarn texturing machines3.2 Yarn heating and residence time in the primary texturing zone3.3 Vapour phase heaters3.4 High-temperature (HT) heaters3.5 Intermediate-temperature heaters3.6 Comparison summary of heater types3.7 Yarn cooling in the texturing zone3.8 Secondary heaters3.9 Machine profilesChapter 4: Yarn twist application methodsAbstract:4.1 Friction disc twisting4.2 Friction disc materials4.3 Influence of friction disc twisting parameters on texturing performance4.4 Friction disc systems advances4.5 Belt twisting4 6 Improving yarn elasticity by torque generation (self twist)Chapter 5: Process performance issues in yarn texturingAbstract:5.1 Friction and surface texture of yarn contact surfaces5.2 Process instability: tension transients and speed limitations due to 'surging'5.3 Creel design and management5.4 Package build specifications5.5 Oil application systems5.6 Automatic doffing systemsChapter 6: Newer yarn texturing machine designsAbstract:6.1 Factors affecting machine design6.2 Examples of new designsChapter 7: Air jet intermingling in yarn texturingAbstract:7.1 The concept of air jet intermingling7.2 The intermingling process7.3 Downstream process issuesChapter 8: Optimisation of process parameters in yarn texturingAbstract:8.1 Influence of texturing parameters on yarn characteristics and performance8.2 Single-position to plant-scale operation8.3 Resolving process quality issuesChapter 9: Draw textured yarn variants and speciality yarnsAbstract:9.1 Double-density machines9.2 Machine variants for draw textured speciality yarnsChapter 10: Process control and quality assurance in yarn texturingAbstract:10.1 In-process controls10.2 At yarn package doff10.3 Laboratory controls10.4 Final product inspection and packing10.5 Statistical process controlChapter 11: Process costs in yarn texturing operationsAbstract:11.1 Factors affecting costs11.2 Opportunities for yarn texturing outside low labour-cost countriesChapter 12: End uses for draw textured yarnsAbstract:12.1 Property benefits of textured yarns12.2 Nylon12.3 Polyester12.4 PolypropyleneChapter 13: The future of false twist texturingAbstract:13.1 Global production trends13.2 Machine development13.3 Process integration13.4 Raw material yarnsIndex