According to the elastic material
2. Rubber band
Spandex generally appears as a webbing on mask ear loop. It is a block copolymer. Because of its special molecular structure, spandex not only has high elasticity but also has excellent recovery performance after stretching, so this chemical product can be used in many fields. , Such as clothing, swimsuits, diapers, condoms and various ultra-thin balloons.
Generally, 70D and 140D spandex yarns are used in the manufacture of ear loop. Domestic spandex brands include Millennium Spandex and Egret Spandex, which come from Huafeng Group and Xinxiang Chemical Fiber respectively.