A, what is the structure of plexiglass
1, plexiglass is made of polymethylmethacrylate, polymethylmethacrylate contains polar side methyl, with strong hygroscopic properties, water absorption is generally in the acrylic sheet must be kept dry, drying the conditions needed to 78 ℃ -80 ℃ under drying 5-6h.
2,. Plexiglass is an invisible polymer, its shrinkage range are decreasing, generally in 0.45% -0.9, so for acrylic production when the molding accuracy provides good conditions, generally molding is very accurate.
3, by the adaptation of polymethyl methacrylate to the surrounding temperature range does not have the ordinary fluidity, but has a non-Newtonian fluidity, so in the case of high temperatures, the solvency of plexiglass viscosity will be reduced, which is the performance of the plexiglass is very sensitive to temperature.
4, plexiglass in the flow of the process of the temperature is generally around 150 ℃, but when the plexiglass began to decompose, the temperature is higher than 270 ℃, so that the change in temperature is still very flexible, will not be affected by the temperature of the production of high-temperature resistance is a characteristic of plexiglass.
5, plexiglass also has a very good cutting performance, can be measured in the size of the clear situation through laser cutting for processing, simple high quality, this feature is not even glass, . Therefore, acrylic can withstand high and low temperatures in various environments, consumers do not have to worry about the temperature in the production process.
Two, what are the uses of plexiglass
Mechanical
Plexiglass has the above excellent performance, making it extremely versatile. In addition to the aircraft used as a cockpit cover, windshield and chord window, also used as a jeep windshield and windows, large buildings skylights (can be shatterproof), television and radar screens, instruments and equipment, protective cover, telecommunication instrumentation, telescopes, and optical lenses on the camera.
There are many kinds of daily necessities made of plexiglass, such as buttons made of pearlescent plexiglass, a variety of toys, lamps and lanterns are also because of the decorative role of colored plexiglass, but also look extraordinarily beautiful.
Medical
Plexiglass has a wonderful use in medicine, that is, the manufacture of artificial corneas. If the clear cornea of the human eye grows full of opaque material, light cannot enter the eye. This is the kind of blindness caused by total corneal leukoplakia, and it's a condition that can't be treated with medication.
So medical doctors envisioned replacing the leukoplakia-covered cornea with an artificial cornea. The so-called artificial cornea, is a transparent substance made of a few millimeters in diameter, then in the cornea of the human eye to drill a small hole, the pillar fixed in the cornea, the light through the pillar into the eye, the human eye will be able to see again.
As early as 1771, some ophthalmologists used optical glass to make the lens post, implanted in the cornea, but did not succeed. Later, crystals were used instead of optical glass, which also failed after only six months. In World War II, when some airplanes crashed, the cockpit covers made of Plexiglas on the planes were blown up, and pieces of Plexiglas were embedded in the eyes of the pilots. After many years, although these fragments have not been removed, but also did not further cause the human eye inflammation or other adverse reactions. This fortuitous event demonstrated the good compatibility between Plexiglas and human tissue. At the same time also inspired ophthalmologists, can use plexiglass to manufacture artificial cornea, it's good light transmission, chemical stability, non-toxic to the human body, easy to process into the desired shape, and can be compatible with the human eye for a long time. Artificial corneas made of plexiglass have been commonly used in clinical practice.
Architecture
In architecture, Plexiglas is mainly used in light bodies, roofs, shed roofs, staircases and interior wall sheathing. Plexiglass in the highway and advanced road lighting lampshade and automobile lamps and lanterns in the application is also quite fast. With the construction of big city hotels, hotels and high-level residential construction, the rapid development of the light body, the use of plexiglass extruded plate made of light body has a high overall structural strength, light weight, high light transmittance and good safety features, compared with inorganic glass lighting devices, has a great deal of superiority.
In terms of sanitary ware, plexiglass can be produced bathtubs, washbasins, vanity and other products. Because of the plexiglass bathtub has a luxurious appearance, a sense of depth, easy to clean, high strength, light weight and comfortable to use and other characteristics have been widely used.
The United States and Japan have made mandatory in the law, primary and secondary schools and kindergarten buildings must use plexiglass. With the continuous improvement of China's laws, is expected in the near future will also make the corresponding provisions. At the same time, China has accelerated the pace of urban construction throughout the country, the use of plexiglass production of street signs, advertising light boxes and telephone booths will also appear in large quantities, thus plexiglass development space is very large, the market outlook is very broad!
We often use plexiglass in the decoration, the above is a simple introduction to plexiglass, I hope to help you.