Acrylic Sheet
PMMA has the advantages of light weight, low cost, easy molding,etc.
Its molding methods are casting, injection molding, machining, thermoforming and so on. Especially the injection molding, can be mass production. The process is simple and low cost. Therefore, it is increasingly widely used. It is currently widely used in instrumentation parts, car lights, optical lenses, transparent pipes and so on.
1.The application of plexiglass acrylic in the construction industry.
In the building, the plexiglass acrylic is mainly used in telephone booths, stairs and room wall panels and other aspects. In sanitary ware, it mainly shows in the bath, washbasin, dressing table and other products. In recent years, its development is also quite fast in the highway, high-grade road lighting shade and automotive lighting applications. Among them, building lighting, bathtub, street advertising light boxes, telephone booths and other aspects of the market growth faster, the future development has large space and the market prospects are very broad.
In recent years, China's building lighting industry developed rapidly with the construction of major cities such as restaurant, hotels and senior residential. With plexiglass acrylic extrusion board made of light, it has overall structure of high strength, high transmittance, high safety and other special advantages. Compared with the inorganic glass lighting, compared with a great advantage.
At present, the United States and Japan have made mandatory in the law, primary and secondary schools and kindergarten building glass, must use plexiglass acrylic. With the continuous improvement of Chinese laws and regulations, is expected in the near future, the Chinese law will also require primary and secondary schools and kindergarten architectural glass must also use plexiglass acrylic. At the same time, China has accelerated the pace of urban construction, street signs, advertising light boxes and telephone booths, which considerable part of the material used is plexiglass acrylic material.
In the sanitary ware, because the plexiglass acrylic bathtub have a luxurious appearance, a sense of depth, easy to clean, high strength, light weight and the use of comfort and other characteristics, in recent years has been widely used, the current domestic annual production of plexiglass acrylic bath is about 1.5 million, the annual consumption of PMMA extrusion board or casting board more than 5,000 tons.
With the increasing construction of China's laws and regulations, PMMA will be in more applications to show greater competitiveness.
In addition, special plexiglass, such as optical plexiglass, anti-ray plexiglass and CD-level plexiglass in China's construction industry is still blank. There is a greater room for development.
2.China plexiglass acrylic PMMA production and market conditions.
China's current total production capacity of plexiglass products in nissan is about 130,000 tons. Many manufacturers, but the production scale is small.
China's plexiglass acrylic production and processing capacity is very large, but the product structure is not reasonable.It can only produce ordinary varieties of products. The lack of construction needs of high value-added products in the variety and quality can not meet the needs of the market. Such as construction with a large demand for the extrusion board are required to import a large number from abroad.
In recent years, China's plexiglass acrylic consumption growth is very fast. But because China's plexiglass PMMA product varieties is monotonous, less quantity, poor quality and far from meeting the needs of the domestic market, leading to a substantial increase in imports year by year. In 2000, China PMMA molding compound imports reached to 77,000 tons while imports of plexiglass plate nearly 4,000 tons. From the import area, Guangdong, Shanghai, Zhejiang and Jiangsu provinces and cities total imports accounted for about 95% of China’s total imports. Jiangsu and Shanghai are the main production areas of plexiglass castings in China. Because of the simple casting process and low investment, many township enterprises use this process for workshop production. Cause the equipment is small and the product quality is far less than the quality standard of building materials industry, model pouring has long been eliminated in foreign countries.
In 1980s, China Acrylic plexiglass annual sales of less than 20,000 tons. The construction industry is not the main consumer market. Since the 1990s, PMMA in the construction industry market has a greater development. Its consumption growth soon. In 2000 it has reached to 85,000 tons, which 29,000 tons of cast plate, extrusion plate 25,000 tons, molding compound 3.1 million tons (molding of extruded plates is not included). The next few years, China's acrylic plexiglass market development rate will remain at 6% per year. It is expected that by 2005, China's acrylic plexiglass market capacity of 110,000 tons, of which the construction industry accounted for about 60% to 70%.
As early as the 1920s, Rohm and Haaxin first invented the way of using PMMA polymerization into acrylic panels (acrylic plate). This plate is called "oroglas / plexiglass". However, the company failed to find a more economical production of PMMA process line, so the acrylic plate (acrylic board) was not able to be universal role.
In 1931, ICI scientists invented the production of MMA acetone cyanohydrin method, this method greatly reduces the cost of PMMA, so that the acrylic plate can be universal. At the same time, ICI has also successfully developed the acrylic panel (acrylic board) for fighter jets and other areas, then ICI company in the United Kingdom built the world's largest acrylic sheet plant.
