久久激情5月丁香伊人_αv中文字幕女人乱码在线_成年人看的毛片在线观看_国产上床视频_精品亚洲国产黄片_三级日本黄页网站大全_国产美女精品网站_在线观看中文综合亚洲_男操女视频免费_亚洲中文字幕无码永久

Engineering plastics are mainly used in automobile, electronic and electrical, machinery, transportation, construction, chemical industry, national defense and military industry, etc.

　　1. Application in automobile field

　　engineering plasticAs the most important automotive lightweight material, its application in the automotive industry is growing rapidly, which can reduce the weight of parts by about 40%. Every 100kg of dead weight of the vehicle is reduced, the fuel consumption can be saved by 0.3~0.5 l per 100 km, and the CO2 emission per km can be reduced by 8~11 G. In addition, the intention of the plastics of auto parts is to improve the functions of auto parts, simplify the manufacturing process, improve the comfort and safety of the car, reduce the production and maintenance costs, and give a higher degree of planning freedom. From the perspective of applied components, engineering plastic parts can be seen everywhere, whether it is exterior decoration parts, interior decoration parts, or functional and structural parts. With the continuous improvement of the hardness, strength, toughness and other functions of engineering plastic, plastic windows, doors, frames and even all plastic vehicles will appear, and the process of automobile plasticization will be further accelerated.

　　2. Application in electronic and electrical engineering

The consumption of electronic and electrical parts made by engineering plastic accounts for about 30% of the total amount of engineering plastic. It has been used as shell material, coating material, matrix material, insulating layer material, etc. of electronic and electrical equipment and components. It will also continue to replace metal and thermosetting plastics. For example, the plastics for plug parts are rapidly transiting from thermosetting plastics to thermoplastic engineering plastics. In recent years, plastics with the functions of conducting electricity, conducting magnetism and electromagnetic shielding are gradually replacing some traditional electronic and electrical materials. In addition, the blowout development of smart phones, smart watches and other fashionable electronic products has also promoted the application of engineering plastic in this field.

　　3. Application in architecture

Plastic building materials have the advantages of light weight and low price. They are widely used in buildings, mainly including plastic doors and windows, plastic pipes, plastic floors, etc. The application of engineering plastic in the building materials industry is mainly PC plate, including greenhouses, lighting corridors, domes, courtyard lighting, community signs, road signs, billboards, light boxes, telephone kiosks, vending machines, switch panels, etc. highway noise barriers are also made of PC plate. Many more personalized and high-grade electrical switches and switch panels are made by engineering plastic. In terms of pipe fittings, with the improvement of the utilization rate of plastic pipes, nylon will replace metal as the primary connector material, while PA66 will be widely used in the heat insulation strips of aluminum alloy doors and windows.

　　4. Application in Mechanical Engineering

The application of engineering plastic in mechanical engineering has always accounted for about 11-12% of the total output, mainly including gears, bearings, bearing cages, covers, pulleys, sliding blocks, valves, propellers or fan blades. In addition to light weight, high strength, good processing formability and low price, the wide application of engineering plastic in mechanical engineering also benefits from its excellent characteristics such as good wear resistance, self lubrication, energy absorption and noise reduction. Engineering plastics for electric tools are required to have good flame retardancy and electrical insulation. The main varieties used include PC, reinforced PC, reinforced PA6 and PA66, as well as flame retardant reinforced PP and PBT, accounting for about 50% of engineering plastics in the machinery industry.

　　5. Application in 3D printing materials

Compared with metal, plastic 3D printing materials are easier to prepare, with less requirements for storage environment, low printing temperature and rapid development. The largest market for 3D printing materials is the automotive industry. In addition, aerospace is also an important application category of 3D printing engineering plastic.

This article is from Jiangmen engineering plastic:http://xrtsm.com.cn/