MATERIALS: TPEs Have Enhanced Resistance to Antiseptic Cleaners

PolyOne's Versaflex HC overmolding TPEs for medical devices also have excellent bonding to other key plastics.

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Two new medical-grade overmolding TPEs for medical device housings boast enhanced resistance to commonly used antiseptic cleaners. The Versaflex HC TPEs from PolyOne Corp.'s GLS Thermoplastic Elastomers, Cleveland, also feature excellent bonding to plastics with improved chemical resistance, such as rigid PVC, co-polyesters, PC/PET, rigid TPUs and PEI, which are increasingly replacing traditional substrate materials. Designed for two-shot injection molding , they are said to provide soft touch and a grippy feel to enhance ergonomics, comfort, and ease of use for housing of hand-held scanners, patient monitors, infusion pumps, defibrillators, reusable surgical devices and other durable medical devices.  

Launched at MD&M West in Anaheim, Calif., Versaflex HC 1348 has a Shore A hardness of 48, slightly softer than HC 1365, which has a Shore A of 65A and a matte finish.  The HC grades also can be customized to achieve desired haptic qualities. After repeated exposure to antiseptics, the new TPE grades resist overmolding delamination, cracking, and loss of resilience. Customer reports indicate that devices made with these TPEs successfully withstood 10,000 antiseptic wipes. They are also compatible with PolyOne’s OnColor HC Plus USP Class VI-compliant colorants, which are said to resist fading from repeated antiseptic use.

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