Brief introduction: PMMA, polymethyl methacrylate Advantages: 1. Advantages of PMMA* are: its optical properties; 2. It is transparent. Different from other transparent materials, it can penetrate the light that other transparent materials cannot. 3. Light can also be transmitted within it for fiber optics. 4. It can withstand outdoor aging and exposure to the sun without affecting its transparency, while other transparent plastics are not available; 5. It has unique electrical properties, and its power factor decreases with the increase of frequency. 6. Good mechanical performance, dilute resistant inorganic acid and alkali, oil, grease and printing performance.