Electronic Products & Technology

Biocompatible UV curable adhesive formulated for TPU bonding

Stephen Law   

Electronics Production / Materials materials production

MASTER BOND UV17Med one part, no mix, UV curable system is specially formulated to provide improved adhesion to many TPUs (thermoplastic polyurethanes), which are widely recognized as challenging substrates for bonding. The compound provides improved toughness with a high elongation of 50-60%. Product passes stringent ISO10993-5 cytotoxicity standards, and cures in 10-30 seconds when exposed to a UV light source emitting at a wavelength of 320-365nm with an energy output of 20-40 milliwatts/cm2. It is recommended that one of the surfaces to be bonded is transparent, without UV blocking agents, so as to allow the light to penetrate the substrate’s surface with no shadows. This flowable system features a low viscosity of 500-3,000 cps, a tensile modulus measuring between 30,000-50,000 psi, and a service temperature range from -80°F to 250°F.

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