New epoxy withstands medical sterilisation methods 09 February 2023

Master Bond has announced the release of its new product, EP41S-5Med. The two part epoxy system features a high temperature resistance and is electrically insulative, therefore making it suitable to be utilised in medical electronic applications.

EP41S meets the requirements of ISO 10993-5 for non-cytotoxicity and can be used for bonding, sealing, and coating in medical devices. This epoxy was tested against many sterilisation methods, such as autoclaving, STERRAD®, Cidex® and Steris®, successfully resisting a hundred cycles. It is also capable of withstanding exposure to gamma radiation, ethylene oxide, as well as other aggressive sterilants and chemicals.

The new epoxy provides a tensile strength of 10,000 psi – 12,000 psi and adheres well to a variety of similar and dissimilar substrates, including metals, plastics, rubbers, ceramics, and composites. The compound has a glass transition temperature of 140°C – 145°C and is serviceable from -80°F to +450°F (-62°C to +232°C). EP41S-5Med also features reliable electrical insulation characteristics with a dielectric constant of 3.5 at 60 Hz and a volume resistivity greater than 1014 ohm-cm.   

EP41S is black in colour and contains no solvents or diluents. EP41S-5Med also offers convenient handling with a 100 to 25 mix ratio by weight. The mixed epoxy has good flow properties with a moderate viscosity of 25,000 cps – 30,000 cps. Upon cure, it offers low shrinkage and a hardness of 85 – 95 Shore D.

EP41S-5Med comes in standard sized units of ½ pint, pint, quart, and gallon kits. It is also compatible with automated gun dispensing systems.

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Becca is the latest member to join our team and is eager to get stuck into the world of fasteners. She brings an enthusiastic and fresh outlook on what we do editorially and will be leading our social media activity – including sourcing material, editing articles and posting online.