The new fast-bonding varnish offers significant time savings when curing lamination stacks made from electrical steel strip. Waelzholz will be presenting this innovative bonding technology for the first time at Coiltech in Pordenone, Italy, from Sept. 22 – 23, 2021, at its booth D32-D34 in Hall 5.
Compared to conventional bonding varnish technology, the new high-speed bonding varnish offers a significantly faster curing reaction when bonding electrical steel strip plates into lamination stacks. This is made possible thanks to innovative advancements to the previous coating system. Depending on the processing method and component size, the time needed to cure electrical steel strip coated with the new bonding varnish has been reduced from 1.5 hours to just a few minutes.
The advantage of this is that stamping and bonding the electrical steel strip lamination stacks can be carried out in only one process step thanks to the shortened curing reaction. In this context, other parameters such as temperature and pressure remain similar to conventional bonding varnish processing. The considerable time savings make the production of lamination stacks particularly cost-effective for customers.
Like all of the coatings for electrical steel strip used by Waelzholz, the new fast-bonding varnish is water-based and thus also meets the high environmental compatibility requirements of modern bonding processes.