High performance polymers for medical devices
With more than forty years of experience, Evonik offers customized products for the medical sector. The product portfolio includes the MEDICAL CARE SERIES, special polymers for medical technology such as fluid delivery systems, catheter, surgical instruments and many others.
The application of polymers in medical devices is often challenging. Besides meeting highest quality standards, materials need to withstand aggressive disinfectants, pharmaceuticals and resist different sterilization procedures without sacrificing mechanical performance. Furthermore, it needs to be ensured that no harmful interaction takes place among the material and any bodily tissue or fluids. Moreover, any reaction with pharmaceutical formulation needs to be avoided to prevent changes in the composition and activity of the active ingredients. Not least, materials for medical applications need to exhibit an excellent processability in order to realize delicate geometries for minimal invasive devices or accurate fit of connecting parts.
A proper material selection is a crucial step in the development process of medical devices. Materials need to meet the highest quality standards, resist harsh chemicals & pharmaceuticals, and fulfill critical performance requirements which need to be maintained after sterilization.
Right polymer for each application
We offer a variety of materials under the Care brand – from transparent to translucent, from elastic to strong, from unmodified to stabilized, filled or functional. In addition to our standard Care grades, Evonik can use its decades of polymer and compound development experience and process know how to customize materials which fulfill unmet customer and market requirements.
VESTAMID® Care ML resins are characterized by several outstanding properties, such as high impact & notched impact resistance, dimensional stability, good sliding properties, high abrasion and chemical resistance.
TROGAMID® Care grades represent a range of both amorphous and microcrystalline transparent polyamides for processing via extrusion or injection molding.
VESTODUR® is the PBT compound with a wide range of viscosities for extrusion and molding application.
VESTAMID® Care ME grades represent a range of flexible polyether block amide (PEBA) resins of varying hardness levels for processing via extrusion and injection molding.
VESTAMID® Care ML grades cover a range of polyamide 12 (PA12) resins with different viscosities for processing via extrusion or injection molding. In addition to unstabilized base resins, our portfolio contains compounds with heat- and UV-stabilization as well as reinforced compounds. Due to the high dimensional stability, tensile strength and low sliding friction, VESTAMID® Care ML grades are for example the materials of choice for catheters and tubings. The VESTAMID® Care ML materials meet even highest challenges in applications such as angio-plasty balloon catheters. Typical areas of application for reinforced VESTAMID® Care ML grades include housing-parts, monitoring and imaging devices and durable medical equipment.
VESTAMID® Care ME materials are polyether block amides, Evonik’s flexible polyamide, which is available in various hardnesses. Due to their broad range of flexibility, VESTAMID® Care ME grades are used in different parts of catheter constructions – may it be the distal end, requiring a low modulus for non-traumatic insertion, or the proximal end, needing a high modulus for force and torque transmission. All VESTAMID® Care ME grades are free of plasticizers and stabilized against heat and UV-light.
TROGAMID® Care grades include both amorphous and microcrystalline transparent polyamides. All TROGAMID® Care grades are BPA free. Amorphous TROGAMID® Care MT50 comprises one of the highest moduli compared to other transparent polyamides and the microcrystalline TROGAMID® MX grades exhibit exceptional resistance against chemicals and stress-cracking. Hence, TROGAMID® Care MX is the material of choice for all applications dealing with pharmaceutical formulations, lipids or aggressive disinfectants. Examples include dialyzer parts, housings, covers, hearing aids, fluid and drug delivery equipment such as stopcocks and connectors. The high mechanical stability of TROGAMID® Care MT50 makes it suitable for applications requiring a high modulus but retained impact resistance; this includes dentures, parts for monitoring and imaging devices or durable medical equipment.
High temperature grades
When it comes to application conditions involving high temperatures, VESTAKEEP® Care grades are the materials of choice. VESTAKEEP® Care polyether ether ketone (PEEK) medical grades are available in different viscosities for processing via extrusion or injection molding. These products offer higher resistance to heat, chemicals, and hydrolysis. Typical areas of application for VESTAKEEP® Care include parts for housings and surgical instruments, gear wheels and other parts for functional units and durable medical equipment. Due to their low water absorption, parts made out from VESTKEEP® Care grades resist steam autoclaving for an extended number of autoclaving cycles.