Many LED light sources have a problem to create uniform diffused light, resulting in brightness concentrations – so-called "hot spots" – on backlit surfaces. Light-diffusing (LD) masterbatches from Tosaf Color Service effectively prevent this undesirable phenomenon. In extensive laboratory trials, the micro-fillers it contains were optimized with regard to material, refractive index, transparency, geometry and dimensions. As a result, only very small amounts of masterbatch – namely 1-2 % – are needed to effectively scatter the light in originally transparent material, predominantly polymethylmethacrylate (PMMA) and polycarbonate (PC). At the same time, the light transmission and mechanical properties of the base material are largely retained. In addition to color-neutral grades, combinations with specific colorings and other functional properties such as UV stabilizers are available.
Low-emission POM masterbatches
Tosaf Color Service’s color, functional and combination masterbatches for POM are now based on particularly low-emission carrier materials. In addition, the pigments have been optimally selected with regard to their effectiveness. As a result, the low emission data of the starting material – depending on the POM type – are almost fully retained, even after coloring and compounding. The new masterbatches thus help to ensure compliance with the strict specifications of the automotive industry for molded parts, and also with the requirements regarding personnel safety. The emission-optimized masterbatches are suitable for all POM grades. At the customer's request, ongoing applications can also be switched to the new technology.