Medical portfolio adds new adhesive for biosensors

DELO Industrial Adhesives has developed a new medical-grade adhesive, DELO MONOPOX MG3727. Based on a long-proven consumer electronics adhesive providing low-temperature curing and drop resistance, this adhesive expands upon its capabilities with non-cytotoxicity, therefore, meeting the standards (DIN EN ISO 10993-5) necessary to classify it as a medical-grade adhesive.

The adhesive is tailored for use in the assembly of biosensors, including ECG/EKG electrodes. As stainless steel is often central to the construction of such equipment, the company ensured that the new adhesive performs well with this substrate material, testing at a compression shear strength of 11MPa.

This one-component, solvent-free and humidity-resistant adhesive features a low Young's modulus of 160MPa, making it resistant to cracking under sudden impact, such as if a sensor falls to the ground. A low glass transition temperature of -52C aids the adhesive to retain its properties across the range of temperature at which a sensor may be used.

The adhesive takes ten minutes to fully cure via a low heat of 90C, making it optimal for temperature-sensitive substrates. With a viscosity of 30,000mPa·s, it can be easily applied via needle dispensing for optimal production efficiency. Blue fluorescence provides for increased process control of dispensing accuracy.

"This is just one of many medical-grade materials we have planned," says Günther Witek, product manager for medical electronics at DELO. "And, more importantly, we will bring our semicon manufacturing, miniaturisation, and equipment expertise to market, enabling our customers to produce astonishing new products."