1. The acrylic board is divided into a casting board and an extrusion board according to the production process. According to the transmittance, it can be divided into a transparent board, a translucent board (including a dyeing board transparent board), a swatch board (including a black and white and a color board); Impact plate, anti-ultraviolet plate, common plate and special plate such as high impact plate, flame retardant plate, frosted plate, metal effect plate, high wear plate, light guide plate, etc.
A: Casting plate: high molecular weight, excellent stiffness, strength and excellent chemical resistance. Therefore it is more suitable for processing large-size signboards, and it is relatively long in the softening process. This kind of plate is characterized by small batch processing. It has unparalleled flexibility in terms of color system and surface texture effects, and its product specifications are complete, and it is used in various special applications.
B: Extrusion plate: Compared with the cast plate, the extruded plate has a lower molecular weight, a slightly weaker mechanical property, and a higher flexibility. However, this feature is conducive to bending and thermoforming processing, softening time is shorter. When dealing with large-size plates, it is beneficial to all kinds of rapid vacuum suction molding. At the same time, the thickness tolerance of the extruded plate is smaller than that of the cast plate. Because the extrusion board is a large-volume automated production with inconvenient color and specifications, the diversity of product specifications is limited.
2, there is also a kind of acrylic called back material regeneration board is the use of recycled acrylic scrap, after thermal degradation of renewable MMA (methyl methacrylate) monomer, and then obtained by chemical polymerization. After a rigorous process, pure MMA monomer can be regained. There is no difference in quality with the newly synthesized monomer. However, the degraded monomer produced is not of high purity. After the sheet is formed, it has poor quality and performance.
Summary: Extrusion plates use granular raw materials, which are extruded at high temperature and then extruded. The casting plate is directly cast with MMA monomer (liquid). Although the extrusion plate is relatively smooth in shape, it is formed when the pellets are formed. To complete the polymerization. In the processing into a plate, its structure and performance are weak, and it is not suitable as a material for outdoor identification products, and is only suitable for indoor products such as crystal characters or product supports. In addition, because most of the extruded plates do not have UV protection, their outdoor service life is not the same as the casting plate. The color will gradually fade and easily embrittle until it breaks. Casting board is to complete the structural polymerization in the process of sheet metal processing, adding UV absorbers between them, with high strength and UV function, outdoor life of up to 5 years or even 10 years, the color has been bright as new during use.
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