Question

Should the handle and the bristle of a toothbrush be made of the same material? Explain your answer.

Answer 1

Hint: Handle of the tooth brush is hard as it is used to brush the teeth, therefore, soft material cannot be used for the handle of the tooth brush. And Bristles of the tooth brush should be of soft material because hard material can hurt gums and teeth.

Complete step by step answer:
No, the handle and bristles of a toothbrush should be made of different materials. The handle of a toothbrush should be hard and strong, so it should be made from plastic. While the bristles should be soft and flexible so, they should be made from nylon.
Plastics are typically organic polymers of high molecular mass and often contain other substances. They are usually synthetic, most commonly derived from petrochemicals, however, an array of variants are made from renewable materials such as polylactic acid from corn or cellulosics from cotton linters.
Nylon is used for making bristles of toothbrush because nylon is the synthetic fibre that is strong and flexible . It doesn't degrade , or break down , in water or with the types of ingredients usually found in toothpaste , which makes for a toothbrush with a longer usable life .

Note: Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes. It is made of repeating units linked by amide links similar to the peptide bonds in proteins.