Pure white on polymer basis
Polymer films and powders produce white color for industrial products
Exhibitors
Location
Hall 11, Stand B06
Description
Manufacturers of plastics, coatings and paints, as well as food, cosmetics and pharmaceuticals, colorize their products with different color pigments. A high degree of whiteness can be considered as a quality feature, especially in the case of white coloring. The mineral titanium dioxide has established as the standard pigment for white coloring. The reason: Due to the characteristically high refractive index of the titanium dioxide particles, incident light is almost completely reflected and appears in the processed product as a brilliant white surface. However, the metal oxide has been criticized because the particles do not degrade and thus pollute the environment over the long term. There are also concerns that titanium dioxide could be carcinogenic. Scientists at KIT are avoiding the use of pigments that are harmful to the environment and health by producing porous polymer structures with a comparably high refractive index. Depending on the required processing form - film or powder - different process steps are used. The processes are biomimetically inspired by the white beetle Cyphochilus insulanus, whose surface appears white as a result of a special microstructure. According to its model, solid, porous microstructures are produced from acrylic glass. The polymer films produced with this process can be industrially applied to different products, while the white polymer powders produced are mixed into a plastic matrix like pigments. The very thin but mechanically stable polymer structures are characterized by a high scattering efficiency and thus by a bright white appearance. The new technology enables a harmless, cost-effective white appearance and can be used on a wide variety of surfaces.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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