Which type of plastics cannot be processed again and again ?

thermosetting plastics like bakelite and melamine

hope t helps!!!!

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Thermosetting plastics do not soften on heating and cannot be reshaped. They are often tough materials with high melting points.Bakelite is a thermosetting plastic. It is used to make handles for utensils, spark plug covers, electrical insulators, ect.

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thermosetting plastics

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