news iso 10993 certification of medical polymer splint polyurethane substrate tri(dimethylaminopropyl)hexahydrotriazine iso 10993 certification for medical polymer splint polyurethane substrate tri(dimethylaminopropyl)he... 03/1958ISO 10993 certification of medical polymer splint polyurethane substrate tri(dimethylaminopropyl)hexahydrotriazine