Three clear, biocompatible polycarbonates with improved flow were introduced for medical devices by GE Plastics, Pittsfield, Mass.
Three clear, biocompatible polycarbonates with improved flow were introduced for medical devices by GE Plastics, Pittsfield, Mass. Two grades are members of a brand-new family of PC copolymers that not only achieve better flow than standard PC resins—without additives—but are also self-lubricating to provide easy release from complex molds. Lexan HPX8R has 35 MFR; Lexan HPX4 has 10 MFR but higher low-temperature ductility, much improved hydrolytic stability for repeated autoclave sterilization, and higher impact strength. For applications that don’t require all the features of the premium-priced HPX copolymers, GE also introduced Lexan HP1HF, a biocompatible conventional PC with high flow (37 MFR) and outstanding hydrolytic stability. The photo shows a ResMed bilevel device to assist sleep apnea patients. It is in-mold decorated with a Lexan film that is overmolded with Lexan HP1HF.