Acrylic Sheet Types and Classification Methods

1, Acrylic sheets are classified into casting sheet and extrusion sheet according to the production process, according to the transmittance can be divided into transparent plate, translucent plate (including dyeing plate transparent plate), color plate (including black and white and color plate); According to the performance cent fight impact board, fight ultraviolet board, common board and special board are like high fight blunt board, flame retardant board, ground frosted board, metal effect board, high wear-resisting board, light guide board.

 

A: Casting acrylic sheet: high molecular weight, excellent stiffness, strength and excellent chemical resistance. Therefore, it is more suitable for processing large size identification plaque, relatively longer time in the softening process. This plate is characterized by small batch processing, unparalleled flexibility in color system and surface texture effect, and a complete range of product specifications, practical for a variety of special purposes.

 

B: Extruded acrylic sheet: compared with the casting plate, the extruded plate has lower molecular weight, slightly weaker mechanical properties and higher flexibility. However, this feature is favorable for bending and hot forming, and the softening time is shorter. In dealing with the larger size of the sheet, is conducive to a variety of rapid vacuum blister forming. At the same time, the thickness tolerance of the extruded plate is smaller than that of the cast plate. Because the extrusion plate is a large volume of automatic production, color and specifications are inconvenient to adjust, so the diversity of product specifications are limited.

 

2 There is a kind of recycled acrylic board is made of recycle acrylic Leftover material, after thermal degradation to obtain reclaimed MMA (methyl methacrylate) monomer, and then from the chemical polymerization reaction. After strict process, pure MMA monomer can be obtained again, with no difference in quality from the new synthetic monomer. But the degradation monomer produced is not high in purity, and the quality and performance of the sheet are poor after it is formed.

Summary: The extruded plate uses granular raw materials and is extruded after high temperature dissolution, while the casting plate is directly molded with MMA monomer (liquid). Although the extruded plate is smooth and smooth in shape, it can be polymerized when the granular raw materials are formed. When processed into the plate, its structure and performance are weak, and it is not suitable for outdoor identification products. It is only suitable for indoor products such as crystal words or product brackets. In addition, because most of the extruded plate does not have anti-ultraviolet function, the life of its outdoor use is not the same as that of the cast plate, and the color will fade away and is very easy to embritten, until the rupture. Casting plate is completed in the process of plate processing structure polymerization, during which the addition of ultraviolet absorbent, with high strength and UV function, outdoor service life of more than 5 years or even 10 years, during the use the color is always bright as new.