Fast-bonding varnish
Fast-bonding varnish
Waelzholz’s proven bonding varnish is also available in a fast-bonding version. This fast-bonding varnish significantly shortens the curing reaction when bonding electrical steel strip lamination stacks – curing can be reduced from 1.5 hours to mere minutes, depending on the customer’s process and the component’s size. In addition to the tremendous time savings, the use of the advanced bonding varnish is particularly cost-effective for the customer because it can be processed in a single production step together with stamping and under virtually constant process conditions.
Unit system
Time savings in the bonding process thanks to fast-bonding varnish
Compared to standard bonding varnish, the new fast-bonding varnish speeds up the lamination stack bonding process from 1.5 hours to just a few minutes.
Electrical steel strip lamination stack manufacturing process
Stamping and bonding process of lamination stacks made of electrical steel strip coated with fast-bonding varnish.
Coating systems fast-bonding varnish
Unit system
| ASTM class |
IEC class | Waelzholz- coating type |
Color | Thickness per side |
Continuous thermal resistance under air |
Annealing resistance under inert gas |
Weldability | ||
in µm |
IEC 60404-12 in °C |
IEC 60404-12 in °C |
SEP 1210 | ||||||
| C-3 | EC-3 | PE75W-Fast | transparent | 3 - 6 | 1801) | - | - | ||
| PE49-Rapid | transparent | 3 - 6 | 1801) | - | - | ||||
1)Thermal class H acc. to IEC 60085
-Less suitable
-Less suitable