PMMA has a lightweight, inexpensive, easy to mold and other advantages. Its molding methods are casting, injection molding, machining, thermoforming and so on. Especially injection molding, can be mass production, simple process, low cost. Therefore, its application is becoming more and more widespread, it is widely used in instrumentation parts, automotive lamps, optical lenses, transparent pipes and so on. Acrylic is the best new material to manufacture sanitary ware after ceramics. Compared with traditional ceramic materials, acrylic, in addition to unparalleled high brightness, there are the following advantages: good toughness, not easy to break; strong repair, as long as the soft foam dipped in toothpaste can be wiped with a new sanitary ware; soft texture, there is no cold and harsh feeling of the winter; bright colors to meet the pursuit of personality of different tastes. With acrylic production basin, bathtub, toilet, not only exquisite style, durable, and has the role of environmental protection, its radiation and the human body's own bone radiation level is comparable. Acrylic sanitary ware first appeared in the United States, has occupied more than 70% of the international market. As acrylic production difficulties, high cost, so there are a lot of low-quality and inexpensive substitutes on the market. These substitutes are also known as "acrylic", in fact, is an ordinary organic board or composite board (also known as sandwich board). Ordinary organic board with ordinary plexiglass cracked material plus pigment casting and become, low surface hardness, easy to fade, with fine sand sanding after polishing effect is poor. Composite panels only a very thin layer of acrylic surface, the center is ABS plastic, the use of thermal expansion and contraction is easy to delamination. True and false acrylic, can be identified from the sheet section of the subtle color difference and polishing effect 1. architectural applications: windows, soundproof doors and windows, light covers, telephone booths, etc. 2. advertising applications: light boxes, signs, signs, display racks, etc. 3. transportation applications: trains, cars and other vehicles, doors and windows, etc. 4. medical applications: baby care boxes, a variety of surgical medical instruments, medical appliances Civilian products: sanitary ware, handicrafts, [1], cosmetics, brackets, aquariums, etc. 5. Industrial applications: instrument surface plates and covers, etc. 6. Lighting applications: fluorescent lamps, chandeliers, street lampshades, etc.