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.
Typically, medical-grade adhesives, sealants, coatings, and potting/encapsulation compounds need to be non-cytotoxic and show compatibility with blood and body fluids.
“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 offers excellent electrical conductivity with low-volume resistivity (10-3 ohm-cm). It also 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. This unique compound can withstand exposure to water, liquid sterilants, anti-microbial disinfectants, and EtO sterilization.
EP77M-FMed 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° to +250° F.
Additionally, it provides 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 to 20 minutes at 75° F and fully cures at room temperature in 24 hours. The compound offers 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 20 gram, 50 gram, 100 gram, one pound and multiple pound cans.
The color of Parts A and B is silver. EP77M-FMed does not contain any solvents and is RoHS compliant.