Master Bond EP77M-FMed is a two-part epoxy adhesive and sealant designed for use in the assembly of medical devices. It reportedly 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," said Rohit Ramnath, senior product engineer.

The company reports that, 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 sterilization. It offers a tensile strength of 2,000-3,000 psi and a tensile modulus of 250,000-300,000 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 1:1 mix ratio by weight or volume and is fast setting, especially when compared to other silver-filled systems. It sets up in 15-20 min at 75°F and fully cures at room temperature in 24 hrs. This compound has a flowable paste-like consistency and bonds well to a variety of substrates, including metals, glass, ceramics, rubbers, and many plastics. EP77M-FMed does not contain any solvents and is RoHS compliant.

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