Yarn is a kind of textile, which is processed into products of a certain fineness with various textile fibers. It is used for weaving, rope making, thread making, knitting and embroidery, etc. It is divided into staple fiber yarn, continuous filament and so on.

There are many ways to express the fineness of yarn, such as number, metric count, imperial count, denier, etc. (see count). The twist of a yarn is expressed in twists per meter or inch.

Wool yarn and yarn are generally used for weaving woolen sweaters, woolen trousers, woolen vests, scarves, hats and gloves, and weaving various spring and autumn clothing items. In addition to keeping warm, they also have decorative functions.

There are two solutions to the problem of yarn strength. One method is to use more advanced spinning technology to spin yarns suitable for easy-care fabrics without changing raw materials, such as compact ring spinning technology.

The second method is to use the method of adjusting raw materials and changing the yarn structure. By combining the original natural fiber and the fiber with good performance and meeting the requirements of easy care through a certain spinning method, the yarn with ideal effect is obtained. There are blended yarns, composite yarns, etc., which are introduced below.

1. Blended yarn

The mixed spinning of two or more fibers mainly adopts the methods of loose fiber mixing and sliver mixing. The strength of the whole yarn is increased by the original fiber raw material and other fibers with high strength and high modulus. Such composite yarns include traditional polyester/cotton, polyester/viscose, polyester/wool, etc., as well as polyester/cotton/Tencel fiber, polyester/cotton/cashmere, etc.

2. Composite yarn

yarn

Yarn (12 sheets)

Two different fibers are intertwined with single yarn or filament to resemble a strand structure, which can be spun on a modified spinning frame or on a hollow spindle. There are mainly siro spinning, sirofil spinning, wrapping spinning, core spinning and so on.

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