Sequin yarn is a special kind of yarn, and it’s a type of fancy yarn. It is mainly used in sweaters, scarves, carpets, curtains and so on. This yarn is usually composed of polyester line of 120D, 150D and all kinds of sequins. The sequins are divided into 2mm, 2.5mm, 3mm, 4mm, 5mm and so on. The shapes of the sequins are generally round, melon seeds and so on. Generally speaking, the thread is usually polyester line, nylon line, combed mercerized cotton, pure cotton yarn and so on. Polyester thread is a general one, nylon thread looks almost the same as polyester yarn, but nylon line is elastic. Combed mercerized cotton generally play the role of anti pilling, which is divided into (802,602,403). Generally, the secondary rate will be higher, if use pure cotton yarn to make sequin yarn.