Acrylic Plastic Products
PMMA has good comprehensive mechanical properties, in general plastics in the forefront, tensile, bending and compression strength were higher than that of polyolefin, polystyrene, polyvinyl chloride is higher than that, the impact toughness is poor, but also slightly better than polystyrene. PMMA sheet casting bulk polymerization (such as organic glass plate with air) tensile, bending and compression of higher mechanical properties, polyamide, polycarbonate can reach the level of Engineering plastics.
acrylic plastic products
In general, the tensile strength of polymethyl methacrylate can reach 50-77MPa, bending strength can reach 90-130MPa, and the upper limit of these performance data has reached or even exceeded some engineering plastics. Its elongation at break is only
2%-3%, the mechanical properties basically belongs to the hard and brittle plastic, and has notch sensitivity, easy to crack in stress fracture, but fracture like polystyrene and common inorganic glass as sharp as uneven. 40 DEG C is a two stage transition temperature, which is equivalent to the temperature of the starting motion of the side methyl group. It is more than 40 degrees centigrade. The toughness and ductility of the material have been improved. PMMA surface hardness is low, easy to scratch.
The strength of polymethyl methacrylate is related to the stress action time, and decreases with the increase of action time. The mechanical properties of PMMA (directional PMMA) after stretching were improved obviously, and the notch sensitivity was improved.
Heat resistance of PMMA is not high, although its glass transition temperature reaches 104 degrees Celsius, but the highest continuous use temperature but with different working conditions change between 65 DEG -95 DEG, thermal deformation temperature is about 96 (1.18MPa), VEKA softening point of about 113 DEG C. Heat resistance can be improved by copolymerization of monomers with methacrylic acid acrylate or diester acrylate glycol ester. The cold resistance of polymethyl methacrylate is poor, and the brittleness temperature is about 9.2. The thermal stability of PMMA is moderate, is better than that of PVC and POM, but not polyolefins and polystyrene, thermal decomposition temperature is slightly higher than 270 DEG C, the flow temperature is about 160 DEG C, melt processing temperature range is so wide.
The thermal conductivity and specific heat of polymethyl methacrylate belong to medium levels, 0.19W/M.K and 1464J/Kg.K respectively
Types of plexiglass (acrylic) sheets
Acrylic products (5 sheets)
There are many kinds of materials.
Common boards are: transparent board, dyed transparent board, milk white board, color plate;
Special board: bathroom board, cloud plate, mirror panels, clamp plate, hollow plate, punching plate, flame retardant plate, super wear-resistant plate, surface pattern plate, matte board, pearl board, metal plate etc..
Different performance, different colors and visual effects to meet the ever-changing requirements.
1, acrylic plate casting and extrusion plate divided according to production process, according to the transmittance can be divided into a transparent plate and a translucent plate (including dyeing, color plate transparent plate) (including black and white and color plates); according to the performance impact plate, anti ultraviolet plate, ordinary plate and special plate plate, such as high impact flame retardant effect of metal plate, matte board, board, high wear-resistant plate, light guide plate etc..
A: casting board: high molecular weight, excellent stiffness, strength, and excellent chemical resistance. Therefore, the utility model is suitable for processing large size identification plaques, and is relatively longer in the process of softening. This kind of board is characterized by small batch processing, unmatched flexibility in color system and surface texture effect, and complete product specifications. It is practical for various special purposes.
B: extrusion: compared with casting, extrusion in low molecular weight and mechanical properties of weak, relatively high flexibility. However, this characteristic is favorable for bending and thermoforming, and the softening time is shorter. In dealing with larger size of the plate, it is conducive to a variety of rapid vacuum forming. At the same time, the thickness tolerance of the extrusion plate is smaller than that of the casting plate. Due to the large number of automatic production of the extrusion plate, the color and specifications are inconvenient to adjust, so the diversity of product specifications is limited.
2, there is a back acrylic plate is made of acrylic material regeneration recycling scrap, after thermal degradation after regeneration of MMA (methyl methacrylate) monomer, followed by chemical polymerization reaction to. Through the strict process, we can get pure MMA monomer, and the quality of the new synthetic monomer is not any difference. However, the degraded monomer is not of high purity, and its quality and properties are poor after forming.
Summary: the use of granular materials after high temperature extrusion, dissolved after extrusion molding, casting plate with MMA monomer (liquid) direct casting molding, extrusion plate shape is although smooth, but because of the raw material particle molding to complete polymerization. In the processing of sheet metal, its structure and performance is weak, and it is not suitable for outdoor marking products. It is only suitable for indoor products such as crystal or product support.
In addition, due to the majority of the Extrusion board does not have UV protection function, its outdoor service life and casting plate is not the same, the color will gradually fade, and easily brittle, until rupture. The casting board is completed structure polymerization in the processing of sheet metal, which added UV absorber, with high strength and UV function, outdoor life for more than 5 years or even 10 years, during the use of color has been as bright as new.
Xiamen Goldcattle Plastic & Metal Product Co.,Ltd
Address:8th Floor,Dongfang shangmao Building,NO.56 Yibinbei RD, Huli Dist,Xiamen,Fujian,China 361006