- PMMA_三菱 - IR H70 Excellent impact resistance and heat resistance IR H50 Well balanced impact resistance and heat resistance IR H30 Medium class impact resistance and excellent heat resistance IR D70 Excellent impact resistance and moldability IR D50 Well balanced impact resistance and moldability IR D30 Medium class impact resistance and excellent moldability IR G304 High impact resistance and rigidity IR K304 High impact resistance and heat resistance IR S404 High impact resistance and excellent moldability