What kinds of plexiglass (acrylic) sheets are there
What kinds of plexiglass (acrylic) sheets are processed by plexiglass? There are many types of acrylic sheets. Common sheets include: transparent sheets, dyed transparent sheets, milky whiteboards, and color sheets; special sheets include: bathroom sheets, cloud sheets, mirror panels, cloth sheets, hollow sheets, impact-resistant sheets, and flame-retardant sheets. Plate, super wear-resistant plate, surface pattern plate, frosted plate, pearl plate, metal effect plate, etc. Different performance, different colors and visual effects to meet the ever-changing requirements.
1. Acrylic panels are divided into cast panels and extruded panels according to the production process. According to the transmittance, they can be divided into transparent panels, semi-transparent panels (including dyed transparent panels), and color panels (including black and white and color Board); According to the performance, it can be divided into anti-impact board, anti-ultraviolet board, ordinary board and special board such as high impact board, flame retardant board, frosted board, metal effect board, high wear-resistant board, light guide board, etc.
A: Casting plate: high molecular weight, excellent rigidity, strength and excellent chemical resistance. Therefore, it is more suitable for processing large-size identification plaques, and the time in the softening process is slightly longer. This kind of board is characterized by small batch processing, incomparable flexibility in terms of color system and surface texture effect, and complete product specifications, which can be used for various special purposes.
B: Extruded plate: Compared with the cast plate, the extruded plate has a lower molecular weight, weaker mechanical properties and higher flexibility. However, this feature is conducive to bending and hot forming processing, and the softening time is shorter. When processing large-sized plates, it is beneficial to various rapid vacuum forming. At the same time, the thickness tolerance of the extruded plate is smaller than that of the cast plate. Because the extruded plate is mass-produced and automated, the colors and specifications are inconvenient to adjust, so the diversity of product specifications is limited.
2. There is also a kind of recycled acrylic sheet that uses recycled acrylic scrap, which is thermally degraded to obtain recycled MMA (methyl methacrylate) monomer, which is then obtained by chemical polymerization. After a rigorous process, the pure MMA monomer can be re-obtained, and there is no difference in quality from the newly synthesized monomer. However, the purity of the produced degradable monomers is not high, and the quality and performance of the sheet are very poor after the sheet is formed.
The extruded plate uses granular raw materials and is extruded after being dissolved at a high temperature. The casting plate is directly casted with MMA monomer (liquid). Although the extruded plate is relatively flat and smooth in appearance, it is In order to complete the polymerization when the pellet material is formed. When processed into plates, its structure and performance are weak, and it is not suitable as a material for outdoor identification products. It is only suitable for indoor products such as crystal letters or product brackets. In addition, since most of the extruded panels do not have the function of UV protection, their outdoor use life is not the same as that of the cast panels. The color will gradually fade and it is easy to become brittle until it breaks. The casting plate is to complete the structural polymerization during the processing of the plate, during which the ultraviolet absorber is added, which has extremely high strength and UV function, and the outdoor service life is more than 5 years or even 10 years. During the use, the color is always bright as new.