The constituent material of the sweater is woolen yarn.
Yarn usually refers to yarn spun from wool, but there are also threads spun from different types of chemical fiber materials, such as acrylic fiber, polyester fiber, and Persian fiber. Although there are many varieties of wool, they can be divided into four categories: wool, fine wool, pattern wool and factory-specific knitted wool.
1. Coarse wool: The linear density of strands is about 400 tex, generally 4 strands, and the linear density per share is about 100 tex. Pure wool high-grade coarse wool is spun from fine wool and is expensive. The intermediate coarse wool yarn of pure wool is made of medium wool. This kind of woolen yarn has a thicker yarn count, good strength, and full hand feeling. Knitted sweaters are thick and warm, and are generally used as winter clothing.
2. Fine woolen yarn: the linear density of strands is 167～398 tex, generally 4 strands. There are two types of skeined woolen yarn and spherical woolen yarn (bulk woolen yarn). This hair line is dry and smooth, soft to the touch, and beautiful in color. It is mainly used to knit into thinner sweaters, light and fit, used in spring and autumn, and the amount of wool is less.
3. Color woolen yarn: This product has a wide variety of colors, and the varieties are constantly being renovated. For example, gold and silver clip wire, printed clip flower, large and small beads, loops, slubs, chains and other varieties. After knitting into sweaters, each has a special charm.
4. Knitting wool: generally two single yarns are combined, mostly used for machine knitting. This kind of knitted sweater is light, clean, soft and slippery.