Fast curing, silver filled epoxy meets ISO 10993-5 cytotoxicity standards 16 March 2021

Master Bond EP77M-FMed is a two part epoxy adhesive and sealant designed for use in the assembly of medical devices. It meets the ISO 10993-5 requirements and is not considered to have a cytotoxic effect.

“This product has been formulated to provide excellent electrical and thermal conductivity properties, while keeping in mind processing constraints for heat sensitive components in sensors used for medical devices or wearable electronics,” says Rohit Ramnath, senior product engineer.

As a silver filled system, EP77M-FMed provides excellent electrical conductivity, with a low volume resistivity of 10 - 3 ohm-cm. It provides a thermal conductivity of 1.44 - 1.73 W/(m•K), resists thermal cycling and has a Shore D hardness of 40-50 at room temperature. It can withstand exposure to water, liquid sterilants, anti-microbial disinfectants and EtO sterilisation. It offers a tensile strength of 2,000 psi - 3,000 psi and a tensile modulus of 250,000 psi - 300,000 psi at 75°F. This system is serviceable over the temperature range of -100°F to +250°F.

EP77M-FMed has an easy to use one to one mix ratio by weight or volume and is fast setting, especially when compared to other silver filled systems. It sets up in 15 - 20 minutes at 75°F and fully cures at room temperature in 24 hours. This compound has a flowable paste like consistency and bonds well to a variety of substrates including metals, glass, ceramics, rubbers and many plastics. It is packaged in 20g, 50g, 100g, one pound and multiple pound cans. The colour of Parts A and B is silver. EP77M-FMed does not contain any solvents and is RoHS compliant.

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889

Having joined the magazine in 2012, Claire developed her knowledge of the industry through the numerous company visits, exhibitions and conferences she attended both in the UK and abroad.

Claire prides herself on keeping readers well informed and up to date with the latest industry news.