1. Different elasticity: the elasticity of high elastic yarn is much stronger than that of low elastic yarn;
2. Different processes: the difference between low elastic yarn and high elastic yarn refers to that when ordinary polyester fibers are texturized, the second hot box of the texturing machine is opened, which means low elastic yarn and high elastic yarn.
3. Different shapes: DTY fiber is curly and FDY fiber is straight.
4. Different costs: there are many processes for polyester low stretch yarn, which is high in cost, and high stretch yarn is low in cost