Properties and main applications of polycarbonate

performance

1. Optical properties.

Its light transmittance is around 90%. It is close to glass but lighter than glass. It is not easily broken and easy to process. Some might think this is so-called plexiglass, but it isn't! The scientific name for what we call plexiglass is "polymethyl methacrylate". Although plexiglass is also a transparent material and even has better optical properties than polycarbonate, its mechanical properties and heat resistance are much different than polycarbonate, and it is not fireproof. So in terms of comprehensive performance, polycarbonate is more comprehensive and more widely used.

2. Mechanical properties.

Polycarbonate is an organic combination of rigidity and toughness. In general, if a material is very rigid, it will be brittle and break as soon as it falls on the ground. But although polycarbonate is very rigid and hard to bend, it is also quite tough, and the products made from it are not easy to break even if heavy objects fall on them from high places. For example, a 4kg ball falls from a height of 0.1m onto a 1.2cm thick polycarbonate plate, which can remain intact.

3. Flame retardant property.

Compared with other plastics, solid polycarbonate has excellent fire resistance. Pure polycarbonate can pass a certain level of fire test without adding any flame retardants. With a small amount of flame retardants, polycarbonate can meet the highest fire standards without losing its optical and mechanical properties, which other plastic products cannot. High temperature resistance. As the temperature rises, all plastic becomes soft at a certain temperature and becomes useless. This is the maximum temperature at which the plastic can be used. As you can imagine, the higher the temperature, the wider the range of plastics. The maximum temperature of polycarbonate can be 120 to 130 degrees. About a decade ago, so-called "space cups," which are transparent and lightweight, were made from polycarbonate.

application

1. Building materials

Polycarbonate plate has good light transmittance, impact resistance, ultraviolet radiation resistance, dimensional stability of products and good molding performance, which makes it have obvious technical performance advantage over inorganic glass traditionally used in construction industry. The weight of polycarbonate plate obtained by pressing or extruding method is 50% of that of inorganic glass, the heat insulation performance is 25% higher than that of inorganic glass, and the impact strength is 250 times higher than that of ordinary glass. It is dominant in the world's construction industry, and about 1/3 of it is used for window glass, commercial window glass and other glass products. In addition, panels made of polycarbonate with a marble appearance and a less foamed wood appearance will also play a big role in the construction and furniture industries.

2. Auto parts

In the pursuit of energy conservation and high efficiency today, lightness and safety is an important goal pursued by the automobile manufacturing industry. fireproof polycarbonate has good impact resistance, thermal distortion resistance, good weather resistance and high hardness. Therefore, it is suitable for the production of various parts of cars and light trucks. Its main application fields focus on the manufacturing of lighting systems, dashboards, heating panels, defroster and polycarbonate alloy bumpers. Especially in the automobile lighting system, the polycarbonate is easy to be formed and processed, and the head, connection piece and lamp body are all molded in the lens, which is flexible in design and easy to be processed, thus solving the technical difficulties in the traditional glass headlamp manufacturing. In western countries, polycarbonate is used in the electronics, electrical, automobile manufacturing industry in the proportion of 40-50%.

3. Medical devices

Because of polycarbonate products are subject to full steam, cleaning agents, heating and high doses of radiation disinfection, and do not become yellow and physical performance, so they are widely used in artificial kidney dialysis, blood, and other needs under the condition of transparent, intuitive operation, and repeated disinfection of medical equipment, such as the production of high pressure syringe, surgical masks, disposable dental appliance, blood oxygen filling machine, blood collection storage, blood separator, etc.

4. Aerospace

With the rapid development of aviation and aerospace technology, the requirements of aircraft and spacecraft components are constantly improved, which makes the application of PC in this field increase day by day. According to statistics, only one Boeing aircraft used on the polycarbonate parts of 2500, the single machine consumption of polycarbonate about 2 tons. On the spacecraft, there are hundreds of different configurations of glass-fibre-reinforced polycarbonate components, as well as the crew's protective gear.

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