Different classification methods produce different names:
1) Different materials used: pure cotton yarn, pure fiber yarn, cotton type blended yarn, wool type blended yarn, shaped yarn, etc.
2) The spinning methods are different: ring spinning, air spinning, electrostatic spinning, etc.
3) The spinning process is different: carding yarn, combed yarn, peach wool yarn, etc.
4) Twist direction is different: hand twist (S-twist) and reverse twist (Z-twist).
5) Different uses of products: yarn for weaving, knitting, raising, rope, fishing net, curtain, etc.
Classification by yarn structure
(1) high elastic wire: high elastic wire or high elastic deformed wire has high elasticity, but general expansion. It is mainly used in elastic fabric, mainly nylon high elastic yarn.
(2) low elastic wire: low elastic wire or deformed elastic wire has moderate expansion and bulkiness. It is mainly used in knitted fabrics, especially polyester low elastic yarn.
(3) bulky yarn: bulky yarn has low elasticity and high bulkiness. It is mainly used for fabrics with good bulkiness, such as wool, underwear or coat. Its typical representative is acrylic bulk yarn, also called cashmere.
(4) the network wire network wire, also known as the cross winding wire, is formed when some wires are held together before forming in the process of chemical fiber manufacturing. This silk is soft, bulky and has good wool like effect. It is mostly used for women's cloth. In recent years, the popular golf cloth is also made of this kind of silk.
Classification by yarn properties and number
Count of chemical fiber yarn: the size of chemical fiber yarn, expressed by metric count "s", large count means chemical fiber yarn size, small count means chemical fiber yarn diameter.
Fineness is the most important index to express the thickness of fiber or yarn. The difference of yarn fineness not only reflects the different uses, but also indicates the different specifications and qualities of the fibers used in spinning to a certain extent. Generally, high-quality fibers are used in spinning. Yarn fineness can be expressed by two direct and indirect indexes.
(1) fixed length system refers to the weight of a certain length of yarn. The larger the value is, the coarser the yarn is. Its measurement unit includes special number (NT) and Dan number (nden) [msoffice2].
a. The special number (NT) refers to the weight gram of 1000m long fiber or yarn at a constant moisture regain, also known as the number. NT = 1000g / L (where l is the length meter of fiber or yarn, and G is the weight gram when its common moisture regain is determined).
For single yarn, the special number can be written in the form of "18 special", which means that when the yarn is 1000 meters long, its weight is 18 grams. The special number of strands is equal to the special number of single yarn multiplied by the number of strands. For example, 18x2 means that two yarns with single yarn of 18t are combined, and their combined fineness is 36t. When the number of single yarn characteristics is different, the number of single yarn characteristics is the sum of the number of single yarn characteristics, such as 18 + 15, and the number of combined yarn characteristics is 33.
b. Denier is the weight of 9000m long fiber or yarn in grams at a constant moisture regain, also known as "fineness". Nden=9000G/L。
The number of Dan can be expressed as 24 Dan, 30 Dan, etc. For the denier number of the strand line, its representation method is the same as that of the characteristic number. The denier number is generally used to express the fineness of natural fiber silk or chemical fiber filament.
(2) weight setting weight system refers to the length of a certain weight of fiber or yarn. The larger the value, the finer the yarn. The units of measurement include metric units (nm) and English units (NE).
a. Metric number (nm) metric number refers to the number of meters of length of a gram of yarn (or fiber) when the moisture regain is determined. Nm=L/G.
Metric number can be expressed in the form of "20 male, 40 male", which means that a gram of heavy yarn has a length of 20 m or 40 m. The metric number of strands is expressed by dividing the metric number of single yarns forming the strands by the number of strands, such as 26 / 2, 60 / 2, etc. If the number of single yarns that make up a strand is different, then the metric number of strands is represented by the number of single yarns that are slashed and tied, such as 21 / 42. The metric number of strands can be calculated
Nm = 1 / (1 / N1 + 1 / N2 + --- + 1 / NN) = 1 / (1 / 21 + 1 / 42) = 14 common branches
In China, the size of wool and wool type chemical fiber pure and blended yarn is still expressed by metric number.
b. English number (NE) the old national standard unit of measurement for the thickness of cotton yarn has been replaced by the special number. It refers to the 840 yards (1 yard = 0.9144 meters) of cotton yarn with a weight of 1 pound (454g). Ne=L/(GX840)。
If a 1 pound yarn is 60 840 yards long, the yarn fineness is 60 English pieces, which can be recorded as 60 ". The number of English strands is the same as that of metric strands. Such as 60 "/ 3.
For example: 20s is thicker than 60s, 20s of the same weight is shorter than 60s, and 20 pieces are heavier than 60 pieces in the same length.
Metric number formula: it is the number of 1kg chemical fiber yarns per kilometer. For example, the chemical fiber yarn with a weight of 1kg and a length of 18000m is 18 yarns.
Classification by use
1. Woven yarn: woven yarn refers to the yarn used to process woven fabrics, which is divided into warp and weft. Warp yarn is used as fabric longitudinal yarn, which has the characteristics of high twist, high strength and good wear resistance; weft yarn is used as fabric transverse yarn, which has the characteristics of low twist, low strength and softness.
2. Yarn for knitting: the yarn for knitting is the yarn for knitting fabric. The yarn has high quality, small twist and moderate strength.
3. Other yarn: including sewing thread, embroidery thread, knitting thread, miscellaneous thread, etc. The requirements for these yarns are different according to the application.
