Hard plastic generally refers to thermosetting plastic, which is processed by hot pressing and cannot be processed again after molding. Generally speaking, hard plastic is raw plastic, feels hard, but is not durable. Commonly used hard plastic include phenolic plastic, polyurethane plastic, epoxy plastic, unsaturated polyester plastic, furan plastic, silicone resins, acrylic resins, etc. and related plastic made of modified resins for the body.
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