Advances in Yarn Spinning Technology (Woodhead Publishing by Carl Lawrence

By Carl Lawrence

This ebook presents a useful unmarried resource of knowledge at the advances in yarn spinning applied sciences. complicated spinning platforms are defined and comparisons are made up of the homes of the yarns produced, and resultant comprehensive items, with these from traditional structures. half 1 offers an creation to yarn fiber spinning and constitution. Chapters speak about the rules of ring spinning and open-end spinning of yarns. Yarn constitution and homes from varied spinning strategies and yarn structural requisites for knitted and woven materials also are tested. half 2 covers advances particularly yarn spinning applied sciences. themes variety from siro spinning to compact spinning expertise and air-jet spinning. ultimate chapters discover the right way to reduce fiber harm that may ensue in the course of spinning and using spin finishes for textiles. With its distinct editor and array of foreign members, Advances in Yarn Spinning expertise is a vital textual content for spinners, yarn brands and upholstery manufacturers, in addition to researchers, technicians, engineers and technologists during this quarter of the cloth undefined.

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Theoretically, 90° is the optimum phase angle as this would give the maximum yarn strength. 20 Principle of self-twist spinning. (also called ST-yarns) [7, 22]. However, the commercial process known as Repco spinning utilises friction twisting by a pair of reciprocating rollers. The details of this system will be described in Chapter 12. 7 Wrap spinning methods Besides the use of twist to consolidate the drafted ribbon of parallel fibres that constitutes a spun structure, surface fibres protruding from the ribbon or a continuous filament (or filaments) can be made to wrap (or bind) the fibre assembly to form a yarn with usable strength.

Clothing needs to be flexible enough to allow the body to move easily. Clothes are three-dimensional structures made from joining two-dimensional structures called fabrics. Fabrics are usually woven or knitted structures. In the former, two sets of threads or yarns are interlaced in a regular pattern. In the latter, one set of threads is looped into others to provide bulk and elasticity to the fabric. The threads/yarns need to be flexible and are therefore made by assembling and twisting together flexible materials called fibres.

These advantages provided others such as fewer piecings on package, smaller floor space for a given production output, lower energy and labour cost per kg of yarn, reduce waste, etc. Despite these advantages, ring spinning still remains the dominant spinning process and seems likely to retain this position well into the twenty-first century. One very important reason for this is the structure and properties of ring-spun yarns compared with yarns from the new spinning methods. Chapters 6 to 14 describe the principles and developments of the more widely commercially available newer methods and Chapters 15 to 17 compare the various structures and properties of the yarns spun from these systems with ring-spun yarns.

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