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　　Acrylic Open Category: Material, Acrylic The word "acrylic" may sound strange, because it is a new word that has only appeared on the mainland in the past two years. Until 2002, it was gradually understood by a few people in the advertising industry, furniture industry, and craft industry. "Acrylic" is a transliterated foreign word. The English name is ACRYLIC, which is a chemical material. The chemical name is "PMMA", which belongs to acryl alcohol, commonly known as "specially treated organic glass". In the application industry, its raw materials generally appear in the form of granules, plates, pipes, etc.

　　2. Acrylic board and organic glass "Organic glass" is derived from English Organic Glass. In recent years, in some regions, all transparent plastic plates are collectively referred to as plexiglass. In fact, this is wrong. Acrylic refers to pure polymethyl methacrylate (PMMA) materials, and PMMA plates are called Acrylic board.

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　　3. Characteristics and advantages of acrylic sheet Acrylic has high transparency, light transmittance of 92%, and has the reputation of "plastic crystal". And has excellent weather resistance, especially for outdoor use, ranking first among other plastics, and has good surface hardness and gloss, processing plasticity is large, can be made into a variety of shapes and products required. In addition, there are many types of plates with rich colors (including translucent color plates). Another feature is that thick plates can still maintain high transparency.

　　4. History of Acrylic Acrylic (acrylic), commonly known as specially treated plexiglass. The research and development of acrylic has a history of more than 100 years. The polymerizability of acrylic acid was discovered in 1872; the polymerizability of methacrylic acid was known in 1880; the research on the synthesis of propylene polypropionate was completed in 1901; the aforementioned synthetic method was used to try industrial production; Manufacturing development is successful, and thus enters large-scale manufacturing. During World War II, because of its excellent toughness and light transmission, it was first applied to windshields of aircrafts, and to the sight glass of the driver's cabin of tanks. The birth of the world's first acrylic bathtub in 1948 marked the application of acrylic into a new milestone.

　　5. The use of acrylic PMMA has the advantages of light weight, low price, easy molding and so on. Its molding methods include casting, injection molding, machining, and thermoforming. In particular, injection molding can be mass-produced, the process is simple, and the cost is low. Therefore, its application is becoming more and more widely. At present, it is widely used in instrumentation parts, automotive lights, optical lenses, transparent pipes, etc.

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