The light and sturdy resin is based on polymethylmethacrylate (PMMA) which has high transparency but also high rigidity and toughness. The fracture behavior of this material was elucidated at the molecular level, and a higher order structure design was achieved. As a result, the flexural modulus was about 1.6 times and the Charpy impact strength at least 10 times higher compared to conventional transparent resins. Impact resistance tests vis-a-vis laminated glass for front window (JIS R 3212) showed improvement of safety by ensuring the viewing field. When applied to a roof glass, weight was reduced by more than 60% compared to laminated glass, and 40% compared to steel.
JST news release, June 25, 2018