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An Overview Of Twisted Yarn


     Yarn twist refers to the yarn to have a certain strength, flexibility, elongation, gloss, feel and other physical and mechanical properties, must be twisted by changing the yarn, the fiber structure to achieve yarn twist, in fact, the use of cotton yarn cross-section , The original straightened parallel fibers and the yarn axis tilt to change the yarn structure, the thickening process in the twisting process gradually shrink from the width of the two sides gradually folded into the center of the yarn line, forming plus Twisted triangular, twisted in the triangle, the width of the sliver and cross-section changes, from the flat band, gradually into a cylindrical yarn.Twisted Yarn

    Short fibers need to be twisted in order to spun yarn, filament in order to facilitate processing or improve the tightness also need twisting, twist on the yarn structure, physical properties, fabric style and clothing performance has a direct impact, it is assessed The main basis for product grade. Yarn twist test methods are: direct counting method, untwisting twist method. Which is untwisted twist method is divided into: untwisting twist A method, untwisting twist B method, three times untwisted twist method. Direct counting method for staple fiber single yarn, twisted multifilament, strand, cable; untwisting twist method for cotton, wool, silk, linen and blended fiber yarn.Twisted Yarn

    Purpose and requirements: Through the yarn twist test, to understand the basic structure of yarn twist and working principle, master the operation of the instrument and sampling requirements, understand the meaning of the indicators.

Standard: GB / T 2543.1, ISO 2061 "Determination of twist of textile yarns Part 1: Direct counting method", GB / T 2543.2, ISO / DIS 17202 "Determination of twist of textile yarns Part 2: Retrogression "Twisting and twisting", GB / T 14345 "Test method for twist of synthetic filament filaments". Relevant standards: FZ / T 10001 "Determination of airtight yarn twist twist and twist method" and other methods and standards covered by the product standards, GB 6529 "textiles humidity and test with the standard atmosphere", foreign related ASTM D 1422, D 1423, AS 2001.1.2.14, BS 2085, JIS L 1095, CAN / CGSB-4.2N0.8, BISFA and other standards.Twisted Yarn