Classification And Characteristics Of Yarn

Yarn is a thin and long product made of the first twist and the tensile strength and softness of the filament or filament. The ply yarn is made of two or more yarns, which are made of second twists. The fineness, strength and evenness of the products are higher than those of the yarns. Strong is a product made of strands and passed through third twists. There are many varieties of yarn and different methods of hair classification. This article is divided according to its structural characteristics.

　　 Spun yarn

Yarns such as cotton and wool are twisted together. Spun yarn The structure is complex and varies slightly due to different spinning methods. Generally speaking, the center of the yarn is a yarn core densely composed of fibers, and the villi area is formed on the surface of the yarn. The structure of a short twisted yarn shows that there are more complicated interactions between the surface of the core and the long silk yarn. There are many fiber knots in low quality staple yarns. Due to the random arrangement of fibers and the change of twist and fineness, the length and width of yarn length are caused. With the addition of different methods, the quality and evenness of staple yarns are quite different. Short spun yarn is bulky and has a good appearance and good insulation and comfort. This is mainly due to the air in the yarn.

　　 Bulk yarn

　　 Bulk yarn It is short staple yarn or filament yarn itself, but it has larger volume, bulky and softer than the original yarn. It includes the following three kinds: bulky yarns, thermoplastics of acrylonitrile yarns, drawing and stretching under heating conditions, resulting in larger elongation, then cooling and fixing to form high shrinkage fibers. This kind of fiber is blended with ordinary fibers to make short staple yarn. After vapor processing, the high shrinkage fibers shrink longitudinally and gather in the yarn core. Ordinary fibers form curl or ring and bulge, which makes the yarn structure become loose and show larger volume. This is bulky yarn. Textured yarns are textured yarns. Stretch yarn has high elongation (3---5 times) and resilience. When it is fully stretched, it is just like ordinary filament yarn; when it is fully relaxed, it is just like bulky yarn. The vast majority of stretch yarns are made of thermoplastic filament (nylon). The filament is permanently curled after false twisting and heat setting, but there is no entanglement between the roots. Knitted underwear made of it has a sense of touch.

　　 Fancy yarn (thread)

　　 Fancy yarn There are many kinds of fancy appearance for decoration, and there are many kinds of production methods. The structure of fancy yarn is made up of core yarn, yarn and solid yarn. The core yarn is the main yarn when it is strong, and the yarn is formed by twisting and wrapping on the core yarn. The solid yarn is wrapped around the yarn in the opposite direction to fix the pattern, but there is also no need to fix the yarn. The following are the names and characteristics of several common fancy yarns. 2. The helix is made of two yarns of fineness, twist and type. The thick and thick fiber bundles are attached to the core yarn and wrapped around the yarn. The ring line decoration line forms a closed circle shape, and the outer yarn is wrapped with yarn. The yarn is wrapped around the core line in a spiral way, but the circle is formed intermittently. 6, chenille line in the core line with a horizontal yarn. The top of the head is loosened with plush. The diamond wire is wrapped around the metal core line (made of transparent protective film coated with aluminum foil or sprayed metal material), and the surrounding color, fine line and solid wire have diamond shaped effect.

　　 Composite yarn (thread)

　　 Composite yarn (line) outside is uniform, composed of different components of yarn. There are two kinds of core yarns: the core yarn is covered by fiber or another yarn. For example, the elastic cord is centered on a rubber band and its periphery is wrapped by yarn. Also like polyester cotton yarn, it is wrapped in high quality outside the polyester filament, the cotton shell makes the yarn sewn, and the polyester core makes the yarn strong. Wrapped yarn is wrapped around filament outside the twisting fiber bundle (short fiber or filament).