SL Resins Look More Like Thermoplastics

Two new epoxy-based liquid photopolymers for stereolithography (SL) rapid prototyping and rapid tooling are said to approximate the aesthetics of engineering plastics.

Two new epoxy-based liquid photopolymers for stereolithography (SL) rapid prototyping and rapid tooling are said to approximate the aesthetics of engineering plastics. The two products come from DSM Somos, Elgin, Ill. Says Somos R&D director Dave Szum, “Not only do engineers want their rapid-prototyping materials to behave like thermoplastics, they now want the parts to look like them as well.” Somos 9420 EP White is designed to mimic the mechanical performance of PP. It is a white version of the very tough, translucent Somos 9120 SL. Somos Precision HT 12920 is an opaque gray version of Somo’s high-temperature material, PhotoTherm 12120. Its stiffness mimics polycarbonate. Its color and opacity are said to show off fine details nicely.