Optimal Optical Properties, Minimum Fuss
There is a growing global trend to integrate transparent plastic sheets in place of glass in building applications such as malls, swimming pools, train stations and DYI. The most commonly used option is polycarbonate (PC) sheets, which are produced in solid, multiwall or corrugated form.
Each form of the PC sheets has its own production challenges. Because polycarbonate is a transparent polymer, its optical properties are of utmost importance, along with optical manipulations where transparent colors, light diffuser and near-IR heat shielders are used. At Tosaf, we offer a comprehensive range of solutions for PC sheet producers.
PC is very sensitive to UV radiation, exposure to the solar radiation, without proper protection tend rapidly to develop high level of yellowness and later on crakes & fractures. UV protection is achieved through the co-extrusion of UV compounds, but the high level of UV absorber additive in the UV cap layer tends to migrate during the production process, affecting extrusion efficiency. As sheet producers work towards improving the extrusion and co-extrusion process, we have taken on the challenge of developing a range of optimized UV protection additives for use in the production of solid and multiwall sheets.
Light Diffusion Protection
One of the problems of a clear cover is that it lets in direct visible light, causing an uncomfortable glare. By introducing a light diffusion (LD) system into the PC sheet bulk, the glare is eliminated. We offer several such solutions in both MB and compound form.
Near IR (NIR) Absorber
Clear PC lets in NIR energy which, especially in hot climates, can cause a ‘greenhouse’ effect in buildings where these sheets are used. We have developed a range of masterbatches based on special pigments that selectively block the NIR energy, significantly reducing the amount of energy transmitted into the building with minimal effect on visible light.