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On the fineness index of yarn


On the fineness index of yarn

1. Imperial Count (Ne)-Under the common moisture regain, the length of 1 pound of heavy yarn is a multiple of 840 yards, that is to say, 1 pound of heavy yarn is exactly 840 yards long, which is 1 yarn, 1 pound of heavy yarn is 21 × 840 yards long, and the fineness of yarn is 21 pieces, which is written as 21s. The imperial count is a fixed weight system, so the larger the count, the thinner the yarn. The imperial count is not the legal yarn fineness index in China, but it is still widely used in enterprises, especially in the cotton textile industry.

2. Metric count (Nm)-Under the common moisture regain, the length of 1 gram of heavy yarn is a multiple of meters, that is to say, 1 gram of heavy yarn is exactly 1 meter long, which is 1 (male) yarn, 1 gram of heavy yarn is 200 meters long, and the fineness of yarn is 200. Metric count is also fixed weight, so the larger the count, the thinner the yarn. Cotton textile wool textile industry are used.

3, Tex (Tex) number-also known as "number", refers to the 1000 meters long yarn in grams of weight at a given moisture regain rate, it is a fixed-length unit, the greater the weight of the yarn thicker, commonly used to represent wool yarn.

4. Denier (D)-also known as "denier" or (denier: denier), refers to the number of grams of weight of 9000-meter yarn or fiber under the same moisture regain. It is also a fixed-length unit. The larger the weight, the thicker the yarn or fiber. It is commonly used to indicate chemical fiber filament, silk, etc. Because the fiber filament and yarn shape is irregular, and the yarn surface has hairiness (protruding fiber short hair), so we can not use the diameter to express its fineness, so the textile workers use the above indicators. Yarn fineness index calculation formula and conversion relation Ne = yarn length code number/(840 * yarn weight pounds) Nm = fiber or yarn length meter number/weight gram number Ntex =(1000 * fiber or yarn weight gram number)/length meter number Nden =(9000 * fiber or yarn weight gram number)/length meter number conversion relation: nm = 9000/Nden Ntex = 1000/Nm Ntex = Nden/9 Ntex = 583/Ne (cotton); Ntex = 590.5/Ne (chemical fiber)

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On the fineness index of yarn