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…mehr
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 yarnsas 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.
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.
Inhaltsangabe
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
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
Rezensionen
"A highly recommended reference work for those involved in yarn texturing machine design, production and processing of textured yarns." --Textile Month International
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