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ENGINEERING PLASTIC WINDOW CHALLENGES TO INORGANIC AUTOMOTIVE GLASS

Views:159     Author:Site Editor     Publish Time: 2019-07-24      Origin:Site

With the depletion of the world's oil resources and the increasingly severe environmental problems, people's urgent requirements for the lightweight, low fuel consumption, reduction of pollution and safety of cars are constantly increasing. Light weight, corrosion resistance, shock absorption, simple molding processing, and easy to recycle plastic is more and more used in the automotive industry. With the coming of the global energy crisis, the trend of green environmental protection and energy conservation is highly valued by people in today's world. From the perspective of energy conservation and emission reduction, automobile manufacturers require glass to be light and has a high level of insulation, and additionally, to reduce aerodynamic force. Inorganic automotive glass will undoubtedly be affected by the impact of lightweight materials, engineering plastic instead of inorganic glass for the manufacture of window glass is no doubt, from the initial lightweight reduction of fuel consumption motivation, to the present because of its many superior factors beyond the original motivation to become a more important reason. With the improvement of the optimal wind resistance and efficiency of cars, the influence of lightweight on vehicles is no longer significant, and the effect produced by lightweight weight reduction is far less than that produced by reducing the center of gravity of cars and optimizing the load distribution of front and rear axles, which also provides new resources for exploring the optimal dynamic performance of cars.

The application of engineering plastics in vehicle

Storage Engineering plastics (PC: polycarbonate; PMMA: polymethyl methacrylate, also known as acrylic) automotive glass has good injection, impact resistance.  And it can be colored according to the user's desire, through coating special hard film coating to further protect and improve the product's weather resistance; It has excellent design freedom and anti-fragmentation performance. It is 50% lighter than similar glass panels. At the same time, in order to ensure effective heat insulation function, the new generation of mode clone infrared absorption transparent color system can absorb more solar energy than the ordinary type of glass, and has the same level of light transmission as ordinary glass. In addition, better than ordinary glass, it can effectively resist ultraviolet radiation, which is entering the field of car glass, and have the potential to replace the ordinary glass.

                 

Characteristics of engineering plastic Windows

Energy environmental protection and lightweight are becoming common problems for the world's automobile industry. In addition to the requirements for seat comfort and safety, the use of automotive plastic products is increasing year by year, in order to achieve the goal of reducing vehicle weight, saving energy and improving fuel economy. Therefore, in recent years, engineering plastics are widely used in the field of automobile industry instead of non-ferrous metals and alloys, which not only improves the appearance and design flexibility of automobiles, reduces the processing, assembly and maintenance costs of spare parts, but also greatly reduces the self-weight of automobiles, thus reducing energy consumption and CO2 emissions. It is reported that every 1% weight reduction in a car can reduce energy consumption by 0.6% to 1.0%. With the development of the trend of lightweight and safety, the major automobile manufacturers begin to focus their attention on reducing and eliminating the hidden danger of safety· important aspects -- Windows glass, PC, with its unique advantages of light transmission, impact resistance, weather resistance and UV radiation resistance, becomes an ideal substitute.   


Engineering plastic window glass has the following advantages.

 Lightweight 

Engineering plastic window is light weight, for example PC window is only half the weight of glass, which is of great significance to reduce fuel consumption. At the same time, the car's center of gravity drops, improving driving agility and agility. According to reports, future vehicles will lose weight from polycarbonate and acrylic glass and transparent ceilings. From 2012, the rear and side windows will be made of polycarbonate, while the front windows will still be made of traditional glass. Full polycarbonate rear window modules will be available by 2013, and heavy traditional window glass will be the past.

  

 Impact resistance

Engineering plastics are superior to glass in terms of safety, and have excellent impact resistance. In case of collision, the plastic structure keeps its integrity due to its better impact resistance, preventing the Windows from breaking and scattering and injuring people. The impact resistance of PC is 10 to 17 times than that of glass. This property of plastic is good for maintaining the integrity of the remaining shell. If car glass uses PC or PMMA, in the event of a crash, it can reduce the debris’ secondary injury to the driver and passengers. From the present development trend, the breakthrough in technology and practicality of plastic windows is feasible. Now the commission (NHTSA) is considering outfitting vehicles further forward. With the solution of technical problems, the application of plastic windows will be more extensive.


Plasticity 

Engineering plastics have good plasticity, and complex geometric shapes can be molded by injection molding. At the same time, multi-color injection molding of engineering plastics can be achieved, which is difficult to achieve for glass. Engineering plastics can be well used in complex geometry with significant structural stiffness.

In addition to the above characteristics, engineering plastics also have other excellent properties, such as: good insulation, low thermal conductivity, high light transmittance, excellent sound insulation performance, easy to form processing and recycling. And it can reduce the penetration of ultraviolet ray, reduce the light aging of interior material, and prolong the service life of interior decoration.


Conclusion

With energy drying up, green environmental protection and energy saving situation is serious. The people with lofty ideals in industry aim at automobile lightweight. Automotive glass is just a large part of car. The weight of organic glass was only about half of inorganic glass, so that finding and using organic glass which is lightweight, transparent and with high adiabatic water flat is the trend. The inorganic glass will undoubtedly be affected by of this kind of lightweight materials. There is no doubt that engineering plastics will replace inorganic glass in the window glass manufacturing according to market research and car safety requirements. This will undoubtedly be a great challenge to the car glass made of inorganic glass.


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