Coil Bonding

What do Coil Bonding Adhesives do?

Coil bonding in automotive electronics presents unique challenges due to temperature-sensitive materials and shadow zones that limit traditional curing methods.

One of the component parts of automotive temperature control systems consists of a lacquered copper coil bonded to a PCB. Because the lacquer is temperature sensitive, heat cannot be used in the curing process. Also, as the coil creates a shadow zone, UV light cannot be used in order to avoid uncured adhesive.

Pre-activating an adhesive with light before joining the components is the ideal solution. The adhesive receives enough energy in the 5-second pre-activation process to fully cure in time, and there is enough adhesive visible after the joining process to illuminate for a further 10 seconds and therefore achieve high initial handling strength.

The final assembled parts are then tested to exacting automotive requirements: 1,000 hours storage at +125°C; 100 temperature cycles between -65°C / 20 minutes and +150°C / 20 minutes; 100 thermal shock cycles between -65°C / 5 minutes and +150°C / 5 minutes; & humidity testing for 1,000 hours at +85°C / 85% RH.

Got a Question About UV or Light Cured Adhesives?

Whether you’re developing a new product or refining an existing process, Inseto’s team of experts is here to help.

From selecting the right UV or light cured adhesive to optimising your curing process, we provide technical guidance, documentation, and samples to support your application needs.