Yarn fineness is an index used to measure the thickness of yarn. There are two calculation formulas commonly used in textiles: fixed-length calculation formula and fixed-weight calculation formula. Fixed-length calculation formula: 1. Tex Number – also known as “number”, refers to the number of grams of the weight of a 1000-meter-long yarn under the public moisture regain. It is a fixed-length unit. The larger the gram weight, the thicker the yarn. It is often used to represent wool yarn. 2. Denier (D) – also known as “denier” or (denier), refers to the number of grams of weight of 9000 meters of yarn or fiber under the public moisture regain rate. It is also a fixed-length system. Unit, the larger the gram weight, the thicker the yarn or fiber. It is often used to represent chemical fiber filaments, silk, etc. 3. Dectex (dtex) – referred to as decitex, the symbol is tex, which refers to the number of decigrams of the weight of a 1000-meter-long yarn at a common moisture regain, dtex=dg/L*1000, where dg is the yarn ( The weight (in decigrams) of the yarn (or silk), L is the length (meters) of the yarn (or silk). It is a fixed-length unit. The larger the weight, the thicker the yarn. It is often used to represent fiber yarn. Fixed weight calculation formula: 1. Imperial count (Ne) – under the public moisture regain, the multiple of 840 yards of the length of 1 pound of yarn, that is to say, 1 pound of yarn is exactly 840 yards long, which is 1 count Yarn, the length of 1 pound yarn is 21 x 840 yards long, the fineness of the yarn is 21 counts, written as 21s. The imperial count is a fixed weight system, so the larger the count, the thinner the yarn. The British count is not the legal yarn fineness index in my country today, but it is still widely used in enterprises, especially in the cotton textile industry. 2. Metric count (Nm) – under the public moisture regain, the multiple of the length of 1 gram yarn, that is to say, 1 gram yarn is exactly 1 meter long, 1 (metric) count yarn, 1 gram weight The yarn length is 200 meters long and the yarn fineness is 200 counts. Metric count is also a fixed weight system, so the larger the count, the thinner the yarn. It is used in both cotton and wool textile industries. Unit conversion formula for fixed-length and fixed-weight systems: (1) Conversion formula for metric count (Nm) and denier (D): D=9000/Nm (2) Imperial count (S) and denier The conversion formula of Er (D): D=5315/S (3), the conversion formula of tex (dtex) and tex (tex): 1tex=10dtex (4), tex (Tex) and denier The conversion formula of Niel (D): Tex=D/9 (5) The conversion formula of Tex (Tex) and British count (S): Tex=K/SK value: pure cotton yarn K=583.1 purified fiber K=590.5 polyester-cotton yarn K=587.6 cotton viscose yarn (75:25) K=584.8 dimensional cotton yarn (50:50) K=587.0 (6) Conversion formula between Tex (Tex) and metric number (N): Tex =1000/N (7), the conversion formula between decitex (dtex) and denier (D): dtex=10D/9 (8), the conversion formula between decitex (dtex) and inch count (S) Conversion formula:: dtex=10K/SK value: pure cotton yarn K=583.1 purified fiber K=590.5 polyester-cotton yarn K=587.6 cotton viscose yarn (75:25) K=584.8 dimensional cotton yarn (50:50) K=587.0 (9 ), decitex (dtex) and metric count (N) conversion formula: dtex=10000/N International textile common unit 1 meter = 1.0936 yards 1 yard = 0.9144 meters 1 kilogram = 2.2046 pounds 1 pound = 0.4536 kilograms 1 Meter = 39.37 inches 1 inch = 0.0254 meters 1 branch (imperial system) = 840 yards 1 branch (metric system) = 1000 meters 1 male branch = 1.69 British branch 1 British branch = 0.583 public branch
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