What is the transmissivity of polycarbonate?

Research resumed in 1953, when Hermann Schnell at Bayer in Uerdingen, Germany patented the initial linear polycarbonate. The cockpit canopy of the Lockheed Martin F-22 Raptor jet fighter is manufactured out of a bit of high optical quality polycarbonate, and may be the largest piece of its type formed on earth. Na22CMe2 + COCl2 → 1/n [OC2CMe2]n + 2 NaClIn in this manner, approximately one billion kilograms of polycarbonate is produced annually. Many other diols have been tested in place of bisphenol A, e.g. 1,1-bis(4-hydroxyphenyl)cyclohexane and dihydroxybenzophenone.

While the highest transmission will obviously come from a single-wall sheet, the multiwall/honeycomb requirement is to be able to minimize conductive/convective losses at the cost of some transmission loss. Therefore, the initial cost of the glazing may be low when compared with other glazings, but after the glazing is replaced many times, it may become less economically attractive than one with an increased initial cost and a longer life span.

Polycarbonate Material Vs Acrylic Material

This is an advantage for greenhouse growers, as diffused light reaches the plant more evenly. This even distribution promotes more consistent plant growth and avoids hot spots due to direct sunlight at times of the day.

• This in turn may require more frequent replacement of the glazing and increased cost.
• or bend, whereas polycarbonate is heat resistant around 240°.
• Best transmittance in the 8-14µm region of any PIR-suitable POLY IR® material.

Various shading materials that reduce light transmittance by 10% to 90% are available. Some of these materials such as for example saran are usually black and the amount of light excluded depends of the thickness of the material’s weave. Other styles of shading glazings are made from fabric with various amounts and dimensions of thin aluminum strips or fibers incorporated that actually reflect light from the structure. Though it has high impact-resistance, it has low scratch-resistance. Therefore, a difficult coating is applied to polycarbonate eyewear lenses and polycarbonate exterior automotive components.

Material Thickness

And processability provide an excellent combination of properties. Phosphorous acid esters-based stabilizers are known to be effective to boost thermal stability of polycarbonate. Ug Plast Inc. supplies distributors that serve a number of industries, including architectural design and construction, signage and displays, medical and consumer products, industrial packaging, and OEM markets. Figure 1 shows the chemical structure of a straightforward hydrocarbon.

Comprising a unique group of chemical and physical properties helps it be suitable over glass, PMMA and

To understand this topic, a complete understanding of polymers is required. Solar Energy Transmittance means the percentage of solar technology permitted to pass through the glazing and has a significant effect on all these modes of heat transfer.