Yarn is a thin, long product of fibers or filaments tha […]
Yarn is a thin, long product of fibers or filaments that has been twisted for the first time and has tensile strength and softness. The strands are made up of two or more yarns. After the second twisting, the fineness, strength and uniformity of the strands are improved. Strong is the strand and the product is made after the third twist. There are many varieties of yarns, and the methods of haircuts are different. This paper is divided according to its structural characteristics.
(1) Spun yarn
The yarns of cotton, wool and the like which are composed of twisted yarns are called spun yarns, and their structures are complicated and slightly different due to different spinning and twisting methods. In general, the center of the yarn is a core composed of dense fibers, and the surface of the yarn has a pile region formed by the exposure of the fiber ends. A retracted spun yarn structure indicates that there are more complex implications between the layers of the core than the filament yarn. There are also many fiber knots in low quality spun yarns. Due to the random arrangement of the fibers, the change in twist and fineness results in coarse details in the direction of the yarn length. The quality and uniformity of spun yarns vary greatly with the addition method. The structure of the spun yarn is bulky and full-bodied, and has good heat insulation and comfort; this is mainly due to the fact that the voids in the yarn contain air.
(2) Filament yarn
Silk or chemical fiber monofilaments are combined in multiple pieces, and a small amount of twists are formed to form filament yarns. Smooth filament yarn (undeformed) is uniform, shiny and strong. Chemical fiber filament yarn is used for clothing raw materials, which is characterized by smooth fabric, color, easy to wash and dry; but lacks the warmth and comfort of natural fiber fabric, single filament yarn is often thicker, used for fishing nets, Satchel.