Why Ultem
Ultem is the brand designation for the polyetherimide (PEI) family of polymer materials. SABIC Innovative Plastics is the sole producer, and supplies numerous grades that serve a variety of processes and applications globally.
Because of its unique molecular structure, Ultem PEI can be melt-processed by injection molding and extrusion, while certain polyimides cannot. In its natural form it is transparent amber, and is available in transparent and opaque colors.
What are the Performance Features of Ultem?
Ultem is recognized for its rigidity and stability even at temperatures over 200oC. The high strength polymer also resists creep, or deformation under load over time. Carbon and glass fiber reinforced grades further enhance the material’s rigidity. Ultem PEI also meets the flammability and smoke generation requirements for aircraft applications, and has the highest dielectric strength among thermoplastics.
What Properties of Ultem are Beneficial for Medical Devices?
Ultem PEI imparts high rigidity and good impact resistance to medical devices. It also maintains its properties after repeated cycles in all common sterilization methods, and resists chemicals and sanitizing agents commonly used in healthcare.
Does Ultem Comply with ISO 10993 Biocompatibility Standards?
Two grades of Ultem have been developed for medical devices requiring ISO 10993 biocompatibility for devices in limited contact with bodily fluids and tissue:
- Ultem HU 1000 is intended for a wide variety of sterilizable applications, and meets the requirements for devices exposed to bodily fluids for up to 24 hours.
- Ultem HU 1004 meets 10933 biocompatibility requirements for devices exposed to bodily fluids and tissue for up to 29 days.