Acrylic (ACRYLIC), the common name is specially treated plexiglass. The research and development of acrylic has a history of more than one hundred years. The polymerizability of acrylic acid was discovered in 1872; the polymerizability of methacrylic acid was known in 1880; the synthesis method of propylene polypropionate was completed in 1901; the aforementioned synthetic method was used to attempt industrial production in 1927; the methacrylate industry was attempted in 1937 The manufacturing development is successful, thus entering large-scale manufacturing. During World War II, because of its excellent toughness and light transmittance, acrylic was firstly used in the windshield of aircraft and the field-of-view mirror of the tank driver's cab. The birth of the world's first acrylic bathtub in 1948 marked a new milestone in the application of acrylic.