Polycarbonate (PC) is a kind of thermoplastic engineering plastic with excellent comprehensive performance. It has excellent electrical properties, low water absorption, good light transmission and visible light transmittance of over 90%. It is the only one of the five general engineering plastics. The variety of good transparency, combined with high strength, ductility and toughness, is widely used in electronics, home appliances, building materials, automobile manufacturing and medical equipment. At present, the material has become the fastest growing general engineering plastic among the five engineering plastics. Since 2005, China's polycarbonate consumption has increased rapidly from 600,000 tons to 1.8 million tons, with an average annual consumption growth rate of 10%. It is expected that China's PC demand will continue to grow rapidly in the future. Polycarbonate sheets are 25% more insulating than ordinary glass, 250 times more impact resistant than glass, and weigh only 1/2 of glass, so PC is the ideal lighting material for the building decoration industry. PC sheets are used in a wide range of applications, including large-area lighting roofs, stair railings, and high-rise building lighting. The automobile is another important terminal application of the PC. The consumption ratio in developed countries is about 20%, but the domestic consumption ratio is only about 5%. The more obvious the trend of lightweight vehicles, polycarbonate has excellent impact strength, easy mold processing, and significantly reduced weight compared to traditional materials such as high-speed steel and aluminum alloy. In addition, PC plastic film used in the field of optoelectronics, light-diffusing PC for LED lighting, and radiation-resistant PC in medical devices are potential hot spots in the future. According to estimates, the Chinese polycarbonate market will continue to grow by 8%-10% in the future. At present, global polycarbonate supply is highly concentrated. Due to the high threshold of polycarbonate production technology, the production capacity is mainly concentrated in multinational chemical companies, and the supply is highly concentrated. According to the authoritative ICIS and Bayer statistics, the world's top six companies account for up to 94% of capacity. Due to the strict control of technology by international giants, domestic polycarbonate plant production is mostly invested by foreign companies or Sino-foreign joint ventures. In 2016, China's actual production was only 570,000 tons, and imports exceeded 1.319 million tons. stainless steel commercial flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. Commercial flat washers generally have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resist ance, such as chemical and food processing equipment. Stainless steel has a higher corrosion resistance than carbon steel. Stainless Steel Washer,Ss Washer,Stainless Steel Square Washers,Black Metal Washers Taizhou Hongchuang Hardware Co., Ltd. , https://www.jstaizhouhongchuang.com
China pc resin products rely heavily on imports
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