Types of Plexiglass PMMA (acrylic) Sheet
April 30, 2020
Types of plexiglass (acrylic) plates
Acrylic sheet has many specifications. Ordinary boards are: transparent board, dyed transparent board, milk white board, color board; special boards are: bathroom board, cloud board, mirror panel, cloth board, hollow board, impact board, flame retardant board, super wear-resistant board, Surface pattern plate, matte plate, pearl plate, metal effect plate, etc. Different performance, different colors and visual effects to meet the ever-changing requirements.
1. Acrylic board can be divided into casting board and extruded board according to the production process. According to the transparency, it can be divided into transparent board, translucent board (including dyed board transparent board), color board (including black and white and color board); Impact board, anti-ultraviolet board, ordinary board and special board such as high impact board, flame retardant board, matte 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-sized identification plaques, which is slightly longer in the softening process. This kind of board is characterized by small batch processing, which has unmatched flexibility in color system and surface texture effect, and the product specifications are complete, which is used for various special purposes.
B: Extruded plate: Compared with cast plate, extruded plate has lower molecular weight, slightly weaker mechanical properties and higher flexibility. However, this feature is conducive to bending and thermoforming, and the softening time is shorter. 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. Because the extruded board is produced in large batches, the color and specifications are inconvenient to adjust, so the variety of product specifications is subject to certain restrictions.
2. Acrylic There is also a kind of recycled material recycling board that uses recycled acrylic scraps to obtain regenerated MMA (methyl methacrylate) monomer after thermal degradation, and then it is obtained after chemical polymerization. After strict process flow, pure MMA monomer can be recovered, and there is no difference in quality with newly synthesized monomer. However, the purity of the degraded monomer produced is not high, and after the sheet is formed, its quality and performance are very poor.
Summary: The extruded plate uses granular raw materials and is extruded after high-temperature dissolution. The casting plate is directly molded with MMA monomer (liquid). Although the shape of the extruded plate is relatively smooth and smooth, it is due to the fact that it is formed by the granular material To complete the aggregation. When processed into a plate, 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 characters or product supports. In addition, because most of the extruded plates do not have ultraviolet protection, their outdoor use life is not the same as that of the cast plate. The color will gradually fade and it is easy to become brittle until it breaks. Casting board is completed with structural polymerization during the processing of the board. UV absorber is added during the process. It has extremely high strength and UV function. The outdoor service life is more than 5 years or even 10 years. The color has been bright and new during use.
发送反馈
历史记录
