Polymethyl methacrylate is a high melting point, high crystalline general-purpose thermoplastic engineering plastic, which is divided into homopolymer and copolymer types. Homopolymer POM is a macromolecule with acetyl groups at both ends and a main chain composed of formaldehyde units, being a homopolymer of trimethylolpropane or formaldehyde. The copolymer POM has a main chain primarily consisting of -(CH2O)-linkages.Molecules with terminal groups being either methoxy ether or hydroxyethyl ether structures (such as the terminal groups are butoxy ether or hydroxyethyl ether if the relative molecular mass regulator uses ethylene glycol).Polycarbonate is an engineering plastic with excellent overall properties, featuring good physical, mechanical, and chemical characteristics, particularly excellent wear resistance. Commonly known as "Super Steel" or "Superb Steel," it is the third-largest general-purpose plastic. Suitable for manufacturing parts that require wear and friction resistance, transmission parts, as well as parts for chemicals and instruments.