1.Acrylic board is divided into cast board and extruded board according to the production process. According to the light transmittance, it can be divided into transparent board, translucent board (including dyed board and transparent board), and color board (including black and white and color board). Impact plate, anti-ultraviolet plate, ordinary plate and special plate such as high impact plate, flame retardant plate, matte plate, metal effect plate, high wear-resistant 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-sized signage plaques, and the time is slightly longer during the softening process. This kind of board is characterized by small batch processing, unparalleled flexibility in color system and surface texture effect, and complete product specifications for practical use in various special applications.
B: Extruded plate: Compared with cast plate, extruded plate has lower molecular weight, slightly weaker mechanical properties, and higher flexibility. However, this feature is good for bending and thermoforming, and has a shorter softening time. When processing large-sized plates, it is beneficial to various rapid vacuum plastic forming. At the same time, the thickness tolerance of the extruded plate is smaller than that of the cast plate. As the extruded board is produced in large quantities automatically, the color and specifications are inconvenient to adjust, so the variety of product specifications is limited to a certain extent.
2. Another type of acrylic is called recycled material recycling board, which uses recycled acrylic scraps to obtain recycled MMA (methyl methacrylate) monomer after thermal degradation, which is obtained after chemical polymerization. After strict process, pure MMA monomer can be obtained again, and there is no difference in quality with the newly synthesized monomer. However, the degraded monomer produced is not high in purity. After the plate is formed, the quality and performance are very poor.
Summary: The extruded plate uses granular raw materials and is extruded after being melted at high temperature. The cast plate is directly cast with MMA monomer (liquid). Although the shape of the extruded plate is flat and smooth, it is because To complete the aggregation. Its structure and performance are weak when it is processed into boards, and it is not suitable as a material for outdoor identification products. It is only suitable for indoor products such as crystal characters or product supports.
In addition, most of the extruded boards do not have the function of anti-ultraviolet, the life of outdoor use is not the same as that of the cast board, the color will gradually fade and it will be easily brittle until it breaks. Casting plate is used to complete the structural polymerization during the processing of the plate. Ultraviolet absorbent is added during the process, which has extremely high strength and UV function. The outdoor service life is more than 5 years or even 10 years.