Elastomers in Medical Devices: Biocompatibility and Safety
Elastomers are categorized based on their origin and chemical composition into natural elastomers and synthetic elastomers.
Natural Rubber (NR) is derived from the latex of rubber trees. It is known for excellent tensile strength, elasticity, and abrasion resistance, making it ideal for tires, conveyor belts, and shock mounts.
Styrene-Butadiene Rubber (SBR) is a widely used synthetic elastomer with good wear resistance and aging stability, often used in car tires and shoe soles.
Nitrile Rubber (NBR) offers exceptional oil, fuel, and chemical resistance, making it indispensable in automotive seals, gaskets, and hoses.
Ethylene Propylene Diene Monomer (EPDM) is highly resistant to ozone, UV, and weathering, commonly found in roofing membranes, seals, and outdoor applications.
Silicone Rubber stands out for its wide temperature tolerance (-60°C to +230°C) and biocompatibility, used in medical implants, bakeware, and electrical insulation.
Thermoplastic Elastomers (TPEs) combine the elasticity of rubber with the ease of thermoplastic processing, enabling applications from soft-touch grips to flexible seals.
Each type is formulated with specific fillers, additives, and curing systems to enhance desired properties, from flame retardancy to chemical resistance. Selecting the right elastomer depends on the balance between flexibility, strength, and environmental resistance required by the application.