Written on 02.08.2013 - Technology
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High-purity TPEs for clinical wire and cable applications

Medalist 8421, 8431, and 8451 are three new TPE compounds from Teknor Apex that combine rubber-like durability and flexibility valued by hospital and clinical professionals and the high degree of purity required for meeting stringent medical standards.

Wiring for patient monitoring sensors

The materials can be used for insulation, jacketing, and moulded fittings and connectors. They have Shore A hardness levels of 92, 69, and 82, respectively, a flammability classification of HB (UL-94), and a maximum continuous operating temperature rating of 105 °C (UL-1581). The compounds are said to retain high levels of tensile strength, tensile modulus, and elongation after autoclave, gamma irradiation, and EtO sterilisation. They are resistant to the cleaning solutions commonly used in medical facilities.

The new grades are analogs to specific Elexar non-medical wire and cable compounds from Teknor Apex and provide comparable properties, but they are manufactured in an ISO-13485 facility dedicated to Medalist medical elastomers. Medalist 8421, 8431, and 8451 compounds pass ISO-10993-5 cytotoxicity testing, are RoHS- and REACH- compliant, and are free of animal-derived materials, phthalates, and latex proteins.

“The new Medalist elastomers for wire and cable provide rubber-like toughness and elasticity and, unlike rubber, are readily recycled,” said Keith Saunders, senior market manager for the Thermoplastic Elastomer Division of Teknor Apex. “As alternatives to PVC, Medalist compounds exhibit practical handling advantages in surgical or clinical settings, including superior ‘drapability’ for reduced cable clutter, better elastic memory in coil cords, and a softer, more supple feel.”