The linear density of fiber  the linear density of length fiber refer to the thickness of fiber. Fiber length refers to the length of the fiber.

The textile fibers must have a certain linear density  length, so that the fibers can hold each other,  rely on the friction between the fibers to spin into yarn. Therefore, the textile fiber has a certain linear density  length, which is one of the necessary conditions for textile processing  making the product have use value.

The linear density of textile fiber is closely related to the properties of yarn  fabric. In general, the lower the linear density  the better the uniformity of the fiber are, the better the textile processing  the product quality. In the influence of fiber density on the wearability of fabrics, the fabrics made of finer fibers are softer  have softer luster. The fabrics made of finer fibers can be lighter  thinner,  also can be made of clothing fabrics with good air permeability  silk like effect. But the fine fiber fabric is easy to pilling, while the coarse fiber fabric can be used to make stiff, rough  thick fabric.

Similarly, the length of textile fiber is closely related to textile  product quality. Long fiber length, good length uniformity  less short fiber content are beneficial to textile processing  product quality. Under the same conditions, if the fiber is long, the yarn strength is high, the sliver is even, the yarn surface is bright  clean, the fabric has good fastness, bright  clean appearance,  is  easy to pilling. In addition, on the premise of ensuring a certain yarn quality, the longer the fiber is, the finer the yarn can be spun, which can be used to make lighter  thinner fabrics. For short length, length is more important than linear density, for example, in cotton grade  pricing, length is the most important indicator.

In textile fibers, the linear density  length of natural fibers are  uniform, sometimes the difference is still large, it varies with fiber varieties, growth conditions  so on. The chemical fiber is manufactured manually. The linear density  length of the fiber can be controlled  determined artificially according to the requirements of fiber processing  use within a certain range.

bulk yarn Bulky yarn is made up of two kinds of fibers with different shrinkage,  then the yarn is put into steam  hot air  boiling water for treatment. At this time, the fibers with high shrinkage produce larger shrinkage, which is located in the center of the yarn, while the mixed fibers with low shrinkage are squeezed on the surface of the yarn to form a circle due to their small shrinkage, so as to obtain bulky, full  elastic bulky yarn Yarn.

The core spun yarn is usually made of synthetic fiber filament with good strength  elasticity as the core,  short fibers such as cotton, wool  viscose fiber are twisted together. The core spun yarn has the excellent properties of both filament core spun yarn  wrapped short fiber. The more common core spun yarn is the polyester cotton core spun yarn, which takes the polyester filament as the core yarn  wraps the cotton fiber. There are also spandex core spun yarn, which is made of spandex filament as the core yarn  other fibers. Knitted fabric  jeans made of this core spun yarn can stretch freely  fit comfortably when wearing.

Linear density of fibers  yarns

Linear density is one of the most important physical  geometric characteristics of fiber. It  only affects the textile processing  product quality, but also is closely related to the wearability of fabric. Similarly, linear density is also the most important index of yarn. The linear density of yarn affects the physical  mechanical properties, hand feel  style of textiles. It is also one of the important basis for fabric design.

There are many ways to express the linear density of fiber  yarn, which are usually expressed by indirect index proportional to the cross-sectional area of yarn. Commonly used indicators include tex (number), metric number, English number, Dan number, etc. Generally speaking, the linear density index of fiber  yarn can be divided into fixed length system  fixed weight system.

Fixed length fixed length system refers to the weight of a certain length of fiber  yarn. The larger its value is, the coarser the fiber  yarn is. At present, the commonly used ones are tex, dtex, MTeX, Dan (d), etc. The legal unit of measurement in China is the special number system.

Tex is referred to as "tex", which refers to the weight grams of 1000m long fiber  yarn at a constant moisture regain. Tex is commonly known as the number for cotton yarn.

In addition, the linear density of yarn can be expressed by diameter. The diameter of yarn is an important basis for fabric design  manufacturing process parameters. It can be measured under a microscope, but in actual production, the diameter of yarn is obtained  the conversion of the specific number  count of yarn  the density of yarn.

In the linear density representation of strand, the special number system is expressed by multiplying the single yarn special number of the strand by the composite number, such as 14 × 2. When the characteristics of single yarn in the strand are different, it is expressed by adding the characteristics of single yarn, such as 16 + 18. The count system is expressed by dividing the number of single yarns that make up the strand by the number of strands, such as 50 / 2. If the number of single yarns that make up the strand is different, the number of single yarns should be juxtaposed  slashed with diagonal lines, such as 24 / 48.

The linear density of multifilament of chemical fiber is expressed by the number of monofilament  total tex. For example, 16.5 tex / 30 f indicates that the density of multifilament bus is 16.5 tex  the number of single wires is 30. The linear density of the multifilament of the chemical fiber  silk is the sum of the linear density of the monofilament that makes up the multifilament.

: Alibaba