Eastman Trēva engineering bioplastic, like Tenite, is a bio-based alternative to traditional polymers, because it is derived from a renewable natural resource (softwoods) and provides significantly improved dimensional stability relative to traditional cellulosics.
Because it flows easily and smoothly when heated, it is a desirable alternative to plastics like transparent nylon used in thin, light applications — for example, slim-framed eyeglasses — at a much lower cost.
Tritan™ from Eastman, which is used for frames as well as lenses, is crystal clear, very tough and BPA free. Its durability makes it an ideal material candidate for high-performance sports sunglasses and children’s eyewear.
Trēva and Tritan possess excellent chemical resistance, and a warm, natural touch and feel.