TR material

It is a compound word consisting of the initial T of Tetoron, one of the trade names of polyester, and the R of rayon.
TR is very suitable for the method of manufacturing eyeglasses using injection molding because it has the property of melting plastic that used to be hard when heated. The transparency of the material itself is high, and it is strong against UV rays, so it can maintain permanent transparency. It is also a very durable material that hardly wears. Because of these characteristics, TR is evaluated as one of the best materials for plastic glasses that have ever been made.