According to the elastic material, there are 1. Spandex, 2. Rubber band
Spandex generally appears as a webbing on mask earbands. 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 speaking, rubber bands appear on mask earbands as a complete product form, that is, they can become earbands without being made into webbing. Rubber bands are divided into natural latex and synthetic rubber in terms of material.