Novelty yarns: mainly refers to Novelty Yarn or Fancy yarns, whose yarn structure, cross-section, color and appearance are different from normal yarns. According to the different characteristics of raw material composition, appearance, handfeel and thread density, various types of fancy yarns can form a variety of styles of products, which are widely used in the fields of clothing, decorative fabrics and hand knitting threads. Commonly used fancy yarns are as follows.

　　① Bulky Yarn ( Bulky Yarn) : Using the different thermal contraction of fibers, the blended yarn will be placed in steam, hot air or boiling water treatment, when the high contraction rate of fibers produce a larger contraction, located in the center of the yarn, and mixed together with the low contraction of fibers due to small contraction, was squeezed on the surface of the yarn to form a circle, so as to get deformed yarn, such as the common acrylic bulky yarn. The fabric composed of bulky yarn is soft, fluffy and has a good imitation of wool.
　　② Core yarn ( Composite Yarn or Core - spun Yarn): a fiber ( such as chemical fiber filament ) as the core, and in the core around the wrap or wrap another fiber ( such as natural fibers ) spinning. Different properties of fiber materials spun into core yarn, can achieve more superior performance than a single fiber. Such as the use of spandex filament as the core yarn, cotton fibers as the core yarn spandex core yarn, used to make stretch denim, stretch corduroy, etc..
　　③ Metal Yarn: Made of metal products such as gold foil, silver foil or polyester film. The fabric has bright appearance and strong decoration.
　　④ Fancy yarns: Yarns with special appearance, spun by special technology. Such as pimple yarn ( Big - belly Yarn), spiral flower thread ( Corkscrew Thread), bamboo yarn ( Slub Yarn), terry yarn ( Loop Yarn), knot yarn ( Knot Yarn), chenille yarn ( Chenille Yarn), etc.. The fabric composed of fancy yarn has rich appearance, strong three-dimensional sense, and soft hand feeling. Such as knotted yarn fabric surface exists many knots, so that the fabric surface style rough.
　　⑤ Mesh yarn: Chemical fiber is formed by letting some of the filaments hug together when spinning is not yet formed. This kind of yarn has soft handfeel and good imitation wool effect.