Chain stitches are made up of self sustaining or interconnecting thread loops. They are commonly used in single chain, double line and three wire stitches. The line track is characterized by elastic line track, which can be telescopic with the seams without breaking the stitches. It is suitable for the clothing of linear elastic fabric or easily loosened products and blanks.
In addition, the sewing machine can be divided into household, industrial and service industries according to its use. It can also be divided into hand sewing machine, foot sewing machine and electric sewing machine according to the driving form.