Customer Challenge
- A new motor design to be used within a demanding, high temperature/high humidity environment required a capable adhesive for magnet retention on surface permanent motors.
- Previous motor designs leveraged an adhesive for magnet bonding that, while proven and highly effective, does not deliver the heat and humidity resistance this application required.
- Processing speed was also a consideration, and the customer wanted a high-speed solution consistent with existing adhesive performance while simultaneously delivering heat and humidity resistance capability.
Customer Requirements
- The adhesive has to withstand high operating temperatures of up to 135° C and relative humidity as high as 95%.
- High volume magnet to shaft bonding processing necessitates a structural adhesive that can be automatically dispensed and cured quickly.
- Long-term reliability of the motor is essential to ensuring dependable function, reducing warranty claims and protecting customer brand equity.
Henkel Solution
- Henkel’s technical team worked with the customer to evaluate the performance of various adhesives. Utilizing advanced testing and analysis technologies at a Henkel design center, results confirmed that universal structural bonding formulation LOCTITE HY 4090 outperformed all products tested in terms of strength under high temperature and humidity.
- While the customer metrics were challenging, LOCTITE HY 4090 exceeded those criteria, showing excellent strength at temperatures as high as 150° C and at 98% relative humidity.
- From a processing perspective, LOCTITE HY 4090 also delivers advantages. The two-part material is easily automated and provides fast fixturing times between 90 and 180 seconds.
- Once material analysis and qualification were confirmed, Henkel helped the customer facilitate seamless transfer to its motor manufacturing facility. The motors are now being used in-application and performing as expected.
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