In synthetic resin, PMMA has excellent high transparency, weather resistance, and excellent gloss. It is often used as a substitute for glass, and can be divided into general grade, optical grade, high temperature resistance grade, extrusion grade and special grade. PMMA is widely used in household products, cosmetic jars, decorations, dashboard, car rearlights, billboards, sound insulation sheets, optical components for LCDs, optical lenses, and products with high chemical resistance requirements.