DELO Introduces Dual-Curing High-Temperature Adhesive
DELO, a leading global manufacturer of industrial adhesives for the automotive, consumer electronics and semiconductor industries, has developed its first dual-curing, high-temperature
adhesive for electric motor applications.
DELO DUALBOND HT2990 is designed for use in multiple processes, including magnet bonding and magnet stacking in electric motor manufacturing.
DELO has developed DELO DUALBOND HT2990 to meet the high demand for durable adhesives to bond electric motors and efficient processes that help streamline production.
DELO DUALBOND HT2990 is the first heat-resistant adhesive capable of light fixation. This supplemental means of curing helps electric motor manufacturers accelerate assembly processes and optimize efficiency in their production, achieving light fixation in 5 to 10 seconds.
In magnet bonding, while heat is the standard method of curing, complementing it with light fixation creates an already-cured outer layer that helps keep everything in place. The adhesive does not seep outside or onto the motor laminations.
In magnet stacking, supplementing heat curing with light fixation lets you forego having to keep magnets under a jig in the oven to reach the desired bond line thickness.
Final curing with heat takes 30 minutes at 150°C or 60 minutes at 130°CIt is possible to skip the heat curing step if exposure to heat occurs later in the electric motor assembly, for instance through heat shrinkage. Induction curing can be another alternative to oven curing as well.
At room temperature, DUALBOND HT2990 can achieve a compression shear strength of up to 70 MPa on steel, compared to 45 MPa achieved by standard high-performance heat-curing epoxies. It also has a high glass transition temperature of 165°C.
In heat as extreme as 180°C, it still displays a tensile shear strength of 7 MPa on aluminum. This is equivalent to 70 kg/cm² of force, a very secure bond.
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