Question

in toothbrush two types of plastics are used thermo plastics and thermosetting platic.why?​

Answer 1

Answer:

Explanation:

For the handles and bristles of toothbrush we can not choose same type of plastics because bristles are used to clean our teeth and gum. So it must be a type of thermoplastic that is nylon but handles of toothbrush must be strong and tough so that it can give some grip and resist our efforts on it. So it should a type of thermosetting plastic.

The handle and bristles of a tooth brush should not be made of the same material. As handle require strength and stiffness so it

should be made from plastic. Where as bristles are soft and elastic so they should be made from nylon.

Hope it helps you