Solvay's new medical-grade PESU boasts retention of transparency and stiffness at high temperatures.

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A new medical-grade polyethersulfone (PESU) is said to retain transparency and stiffness at high temperatures and offers processing advantages over other high-heat, transparent polymers. Unveiled at MD&M West in Anaheim, Calif. by Solvay Specialty Polymers, Alpharetta, Ga., Veradel HC A-301 PESU has been tested under ISO 10993 biocompatibility standards for cytotoxicity, irritation and acute systemic toxicity.

Moreover, it is said to be the first PESU for use in medical devices to offer a Master Access File (MAF) on record with the FDA. The material is soon expected to pass USP Class VI testing, and is available for sampling in healthcare applications. These well-documented compliance records can facilitate the design and regulatory application process for OEMs of medical devices, accelerating product time to market. Target applications include housings and internal structural components for medical diagnostic equipment, monitoring and filtration devices, and biopharma processing applications such as sight windows and quick-connects.

Veradel HC A-301 PESU boasts the highest stiffness of all of Solvay’s medical-grade sulfone-based polymers. It offers heat resistance that is on par with the company’s Radel PPSU (polyphenylsulfone) and its high flow rate makes it well suited to injection molding of thin-walled parts and components with complex geometries. It is also a viable alternative to polyetherimide (PEI) as it exhibits properties similar to those of PEI for strength, transparency, dimensional stability, inherent flame resistance, and compatibility with steam sterilization and chemical sterilants. The new PESU’s lower inherent color and higher flow rate may prove advantageous in some applications, according to Solvay.

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