The linear density of fibers refers to the degree of fiber thickness. The length of the fiber refers to the length of the fiber.
Textile fibers must have a certain linear density and length in order for the fibers to cling to each other and rely on the friction between the fibers to spin the yarn. Therefore, the textile fiber has a certain linear density and length, which is one of the necessary conditions for textile processing and making the product use value.
The linear density of textile fibers is closely related to the textile processing and the properties of yarns and fabrics made. Under normal circumstances, the lower density and better uniformity of the fiber strands are beneficial to textile processing and product quality. In the effect of fiber thread density on fabric handling performance, fabrics made of finer fibers are softer and have a softer luster. Finer fabrics can be used to make lighter fabrics, as well as good breathability and imitating silk effects. Good clothing fabrics. However, fabrics made of fine fibers are easy to puff, pill, and crude fiber fabrics can be used to make stiff, rough, and thick fabrics.
Similarly, the length of textile fibers is also closely related to textile and product quality. Longer fiber length, good length uniformity, and low staple fiber content are beneficial to textile processing and product quality. Under the same conditions, if the fibers are longer, the resulting yarns will have high strength, uniform strands, smooth yarn surface, good fabric fastness, smooth appearance, and low lint and pilling. In addition, under the premise of guaranteeing certain yarn quality, the longer the fiber, the finer the yarn that can be spun, can be used to fabricate a lighter fabric. For shorter lengths, length is more important than linear density. For example, length is the most important indicator in cotton grade and pricing.
In the textile fibers, the linear density and length of the natural fibers are not uniform, and sometimes the difference is large, and it varies depending on the fiber type, growth conditions, and the like. The chemical fiber is artificially manufactured, and the linear density and length of the fiber can be artificially controlled and determined within a certain range according to the requirements of fiber processing and use.