firstly do you mean and insulator of heat or current?
in solids heat is transferred by the free electrons in the material so if the material has no free electron (e.g plastic) then heat cant dissipated throw it. current (electricity) is a flow of electrons so if there are no free electron no current can flow.
i hope that answers your question.
bowl is conductor
is a pen a insulator of conductor
Plastic is an insulator.
Plastic is an insulator.
Plastic is an electrical and thermal insulator.
Insulator
insulator
It is an insulator
an insulator.
Plastic is an insulator. Yes, he is correct!
insulator
insolator