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A brief introduction to the classification methods and types of acrylic
Dec 05, 2018

1. Acrylic sheet is divided into casting board and extrusion board according to the production process. According to the transmittance, it can be divided into transparent board, translucent board (including transparent board of dyeing board), 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, 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-sized signboards, which is relatively long in the softening process. This sheet is characterized by small batch processing, incomparable flexibility in color system and surface texture effects, and complete product specifications for a variety of 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 advantageous for bending and thermoforming processes with a shorter softening time. It is advantageous for various rapid vacuum forming when dealing with large-sized sheets. At the same time, the thickness tolerance of the extruded plate is smaller than that of the cast plate. Since the extrusion plate is mass-produced in an automated manner, the color and specifications are inconvenient to be conditioned, so the product specification diversity is limited.

2, Acrylic also has a kind of recycled material recycling board is the use of recycled acrylic trim, after thermal degradation to obtain recycled MMA (methyl methacrylate) monomer, and then obtained by chemical polymerization. After a rigorous process, the pure MMA monomer can be regained, and there is no difference in quality from the new synthetic monomer. However, the purity of the degraded monomer produced is not high, and the quality and performance of the sheet are poor after molding.

Summary: The extruded sheet is made of granular raw materials, which are extruded after high temperature dissolution, and the casted sheet is directly cast by MMA monomer (liquid). Although the extruded sheet is flat and smooth, it is formed during the formation of the pellet raw material. To complete the aggregation. When processed into sheet metal, its structure and performance are weak, and it is not suitable as a material for outdoor signage products. It is only suitable for indoor products such as crystal characters or product holders. In addition, since most of the extruded plates do not have the function of preventing ultraviolet rays, the life of the outdoor use is not the same as that of the cast plate, the color will gradually fade and it will be easily embrittled until it is broken. The cast sheet is structurally polymerized during the processing of the sheet, with the addition of UV absorbers, which have extremely high strength and UV function. The outdoor service life is more than 5 years and even 10 years. The color is always bright and new during use.


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