This either can be a coating (e.g. for improved abrasion resistance), or a coextrusion for enhanced weathering resistance.
•
Polycarbonates (PC), known by the trademarked names Lexan, Makrolon, Makroclear and others, are a particular group of thermoplastic polymers.
•
A species of fungus found in Belize, Geotrichum candidum, has been found to consume the polycarbonate found in CDs.
Internally, each arch will be covered in polycarbonate (Lexan) to prevent the accumulation of radioactive particles on the frame members themselves.
Polymers which have been around, and which are in current widespread use, include carbon-based polyethylene, polypropylene, polyvinyl chloride, polystyrene, nylons, polyesters, acrylics, polyurethane, and polycarbonates, and silicon-based silicones.