The mechanical properties of textile fibers should include fiber strength, elongation, elasticity, wear resistance, elastic modulus, etc.

Fiber strength: Fiber strength refers to the ability of fibers to resist external damage, which largely determines the durability of textile products.

The strength of fibers can be expressed by their absolute strength, which refers to the maximum load that fibers can withstand under continuously increasing loads until they break. Its legal teaching unit is Newton (N) or Centimeter Newton (cN). In the past, it was customary to express it in grams or kilograms.

Due to the correlation between fiber strength and fiber thickness, absolute strength cannot be compared for fibers of different thicknesses. Therefore, relative strength is commonly used to represent the strength of fibers. Relative strength refers to the maximum tensile force that a fiber can withstand per unit linear density (per tex or per denier). The legal unit of measurement is N/tex or cN/tex. In the past, it was customary to express it in grams per dan.

Elasticity of fibers: Fibers and their products are subjected to external forces and undergo corresponding deformations during processing and use. After the external force is removed, part of the deformation of the fiber can be restored, while the other part of the deformation will not be restored. According to this characteristic of fibers, the deformation of fibers can be divided into three parts, that is, the part that can be immediately restored after the external force is removed is called rapid elastic deformation; The part of deformation that can slowly recover after the external force is removed is called slow elastic deformation; The part of deformation that cannot be restored after the external force is removed is called plastic deformation.

The elasticity of fibers refers to their ability to recover from deformation. The commonly used indicator to indicate the elasticity of fibers is the elastic recovery rate or rebound rate of fibers. It refers to the percentage of rapid elastic deformation and gradual elastic deformation over a certain period of time in the total deformation.