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What is the Density of Yarn?

Views:181     Author:Site Editor     Publish Time: 2019-07-13      Origin:Site


What Does the Yarn Density Mean?


Yarn count: refers to the length of each gram of yarn, that is, the higher the count, the finer the yarn, the better the uniformity, and vice versa, the lower the count, the thicker the yarn. The yarn count is marked as "S". 30S or more is called high count yarn, (20S-30S) is medium yarn, and below 20S is low yarn.


Density: Refers to the sum of the warp and weft density of the fabric. It can also be expressed separately. For example: 200 yarns/1 square inch, its warp direction is 110 yarns, and the weft direction is 90 yarns. It can also be expressed by 110*90. For example, the density of the "XX" CC product is 144 yarns per square inch.


The yarn count is the most basic unit of the finished fabric. The number of the yarn count is inversely proportional to its thickness. The larger the number, the finer the grain, and the corresponding quality requirements for the raw material (cotton) are higher. The yarn count of the bedding fabric is generally divided into 21, 30, 40, 60, and 80 according to the thickness. The common bedding is 40. The most suitable bedding yarn for the bedding should be 40 twill fabrics in the summer and 21 plain fabrics in the winter.


Yarn Density


Warp and weft density: refers to the number of warp and weft yarns arranged per square inch. As commonly seen, “40×40/128×68” means 40 warp yarns and weft yarns respectively, and the warp and weft density is 128×68, which is also bedding. An important technical indicator of the purchase, the higher the bed density of the same count, the better, the high support can be high density. The reason why sweaters can keep warm is because there are 250 yarns per square inch, and the fine density brings high heat retention.


Shrinkage of fabric: refers to the percentage of fabric shrinkage after washing or immersion. In general, the fabrics with the highest shrinkage rate are synthetic fibers and blended fabrics, followed by wool, hemp, and cotton. After pre-shrinking treatment does not mean not shrinking, but means that the shrinkage rate is controlled within the national standard.



Is the Yarn Density Related to the Thickness of the Fabric?


Fabric organization: All kinds of woven fabrics are made of warp and weft, which are intertwined according to a certain law. The law of floating and sinking is called organization.

Warp--Longitudinal: Yarns arranged in parallel with the edge of the cloth.

Weft--Horizontal: Yarns that are aligned (perpendicular to the edge of the cloth).

The number of warp and weft yarns can be expressed by warp yarns and weft yarns. For example, the warp yarns of a fabric are 20 and the weft yarns are 16, which can be expressed as: 20S×16S.


Density of the fabric: The density of the fabric refers to the number of warp or weft yarns the fabric has per unit length. The density is divided into warp density and weft density, referred to as warp and weft density.


Linear density of yarns and linear density of yarns: refers to the thickness of the yarns. Textile fibers must have a certain linear density and length in order for the fibers to entangle each other and to be spun into yarns depending on the friction between the fibers. Therefore, textile fibers have a certain linear density and length, which is one of the necessary conditions for textile processing and the use value of the products.


The linear density of textile fibers is closely related to the processing of the textile and the properties of the finished yarn and fabric. Under normal circumstances, the yarn density is low and the uniformity is good, which is beneficial to textile processing and product quality. In the influence of yarn density on fabric properties, fabrics made of finer yarns are softer in gloss. Finer fibers can be used to make fabrics that are lighter and lighter, and also have good air permeability and silk-like effect. 


nylon yarn


The coarse fiber fabric can be used to make a stiff, rough and thick fabric. Similarly, the length of textile fibers is also closely related to the quality of textiles and products. Longer fiber lengths, good length uniformity, and low staple fiber content are beneficial to textile processing and product quality. Under the same conditions, the fiber is long, the yarn strength is high, the strip is even, and the surface of the yarn is smooth. The fabric has good fastness, smooth appearance, and is not easy to fluff and pilling. In addition, under the premise of ensuring a certain yarn quality, the longer the fiber, the finer the spun yarn can be used to make a relatively thin fabric. For shorter lengths, length is more important than linear density. For example, in cotton grade and pricing, length is the most important indicator.


In textile fibers, the linear density and length of natural fibers are not uniform, and sometimes the difference is large. It varies with fiber type and growth conditions. While chemical fibers are manufactured by hand, the linear density and length of the fibers can be artificially controlled and determined within a certain range according to the requirements of fiber processing and use.


Linear density affects textile processing and product quality, and linear density is also the most important indicator of yarn. The linear density of the yarn affects the physical and mechanical properties, feel, style, etc. Of the textile, and it is also an important basis for fabric design.



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