Yarn fineness indicators are mainly used to indicate yarn fineness, including English count, metric count, special count and denier count.
1. Inch count (Ne) - the multiple of 840 yards of the length of 1 pound of yarn under the common moisture regain, that is, 1 pound of yarn is exactly 840 yards long, which is 1 count of yarn, and 1 pound of yarn is 21 × 840 yards long, the fineness of yarn is 21, written as 21s. The imperial count is a fixed weight system, so the larger the count, the finer the yarn. English count is not the legal yarn fineness index in China today, but it is still widely used in enterprises, especially in cotton textile industry.
2. Metric count (Nm) - under the metric moisture regain, the meter multiple of the length of 1 gram weight yarn, that is, 1 gram weight yarn is exactly 1 meter long, which is 1 (metric) count yarn, 1 gram weight yarn is 200 meters long, and the fineness of the yarn is 200 counts. The metric count is also a fixed weight system, so the larger the count, the finer the yarn. It is used in the cotton and wool textile industry.
3. Tex number, also known as "number", refers to the weight of 1000-meter long yarn at a constant moisture regain. It is a unit of fixed length system. The larger the weight is, the thicker the yarn is. It is often used to represent wool yarn.
4. Size (D) - also known as "denier" or (denier: denier), refers to the grams of weight of 9000 meters of yarn or fiber under a common moisture regain. It is also a unit of fixed length system. The larger the weight of grams, the thicker the yarn or fiber, and is often used to represent chemical filament, real silk, etc. Because the shape of fiber filament and yarn is irregular, and the yarn surface has hairiness (protruding fiber short hair), we can not use the diameter to express its fineness, so textile workers use the above indicators to express
