Quality of Yarns Produced by Japanese Open-End BD-200 Spinning Machines and of Final Products
نویسنده
چکیده
Yarns produced by Japanese Open-end BD-200 spinning machines give these major advantages: (1) They are somewhat stronger than yarns spun by Czecho BD-200's. (2) They are almost as strong as yarns spun by ring spinning machines. This strength is obtainable without raising the cost of raw cotton if the right fore-spinning processes and spinning conditions are used. (3) They have maximum strength if the coefficient of twists is about 5.5 to 6.0. (4) In evenness they almost equal combed yarns. (5) They are high in bulkiness, abrasion resistance and d,eability because they are of a single helical structures. (6) The number of end breaks during warping and weaving is 50-l00° smaller than for ring-spun yarns. (7) They can be made good enough to replace ring-spun yarns in final products with slight care in processing. (8) They can be made into a wide variety of final products which require a good appearance, thickness, stiffness and harshness.
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