By Carl A. Lawrence
Current textbooks protecting the topic of yarn manufacture principally pay attention to describing the workings of machines. basics of Spun Yarn know-how offers entire assurance of yarn manufacture and know-how and present study findings at the constitution and houses of spun yarns. Written by means of a well known and revered authority on cloth know-how, it not just introduces the topic, however it presents scholars with a sophisticated figuring out of many of the method levels. The booklet introduces the rudiments of staple yarn expertise, overlaying the producing method, the uncooked fabrics, and approaches together with brief staple, worsted, semiworsted and woollen spinning, doubling, and forte yarn procedures. It additionally covers the extra complex reviews in staple yarn know-how, together with new advancements in fiber guidance know-how, carding expertise, curler drafting, gilling, ring spinning, open-end rotor spinning, air jet spinning and new learn on unconventional spinning platforms. This huge variety of issues, in addition to hundreds and hundreds of tables and illustrations offered in basics of Spun Yarn know-how make it a finished and updated remedy of the sector.
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Additional info for Fundamentals of Spun Yarn Technology
Sample text
3,15 Only very small quantities of inorganic fibers are spun into staple yarns. 23 The luxury fabrics market, being more exotic, will always remain relatively small, but the technical textiles sector is seen to have major growth potential. The market drivers that influence growth in yarn production are population and general economic growth, and increasing consumer purchasing power. 7% per annum. Around 16% of the world population currently has a per capita fiber consumption of greater than 10 kg, with the richer countries having 20 to 40 kg per capita.
Australia dominates the world market for fine wool fiber suitable for worsted processing (mainly in the region of 17 to 25 µm diameter), having over 30% of the world’s production and around 50% of the total exported volume of greasy wool. The wool comes from Merino sheep that represent around 75% of Australia’s sheep numbers. New Zealand wools are crossbreds (crossbred sheep result from crossing Merino sheep with other types, mainly the Romney breed),39,40 accounting for 10% of world production and 20% of wool exports.
For Upland cotton, there are 25 official color grades plus five categories of below-grade color, as shown in the following table. USDA maintains measured standards for 15 of the color grades. The others are descriptive standards. Color Grade: Upland Cotton (1993) White Light Spotted Spotted Tinged Yellow Stained Good middling 11* 12 13 — — Strict middling 21* 22 23* 24 25 Middling 31* 32 33 35* 35 Strict low middling 41* 42 43* 44* — Low middling 51* 52 53* 54* — Strict good ordinary 61* 62 63* — — Good ordinary 71* — — — — Below grade 81 82 83 84 85 *Physical standards; others are descriptive.