The yarn count is the thickness of the yarn, and its representation methods are S, D, N, Tex, Dtex, and the like. Specific fabrics use specific specifications, of which S and D are more common. In the scientific literature, tex is generally converted.
S is the British count. It refers to a yarn weighing one pound at a given moisture regain. It has a length of several 840 yards and is called a few yarns. Generally, the yarn count of the staple fiber is represented by S, and the staple fiber is represented by Staple in English. The coarser the yarn, the smaller the S value; the finer the yarn, the larger the S value, such as 40S is thinner than the 20S yarn count.
D is the abbreviation of Denier, which is a fineness expression method of chemical fiber, and refers to the weight in grams of a 9000 meter long wire at a predetermined moisture regain. Generally, the number of filaments is represented by D, and the filaments are expressed in English as Filament. A larger D indicates a thicker yarn, such as 75D is thicker than 50D.
Tex Turks, also known as "number", referred to as special, formerly known as the public. It refers to the weight of a 1000-meter long yarn at a given moisture regain.
Nm metric count refers to the meter multiple of the length of 1 gram of heavy yarn under the specified moisture regain rate, that is to say, 1 gram of heavy yarn is exactly one meter long and 1 (male) yarn, and 1 gram of heavy yarn is 200 meters long, the fineness of the yarn is 200. The metric count is also a fixed weight system, so the larger the count, the finer the yarn.
Dtex sub-tex, referred to as decitex, refers to the number of grams of 10,000 meters long fiber bundle.
The following are the mutual conversion formulas for several units.
D=5315/S, D=9000/N, Tex=D/9, 1Tex=1/10Dtex, Tex=1000/N, Dtex=10D/9, Dtex=10000/N