The two materials are derived to meet the market needs of different styles of toothbrushes. Specific styles can only use fixed raw materials, and there is no difference in quality between the two materials. For example, if you want to make a two-color or pure transparent toothbrush, then you must use hard plastic. There is no other reason. This is a product production process problem, or you want to make a translucent toothbrush. Effective toothbrush, then you have to choose soft plastic raw materials.
