Peel Testers

-Determine the strenght of the enamel on the wire

A peel test is a mechanical test used to measure how strongly two materials (wire and enamel) stick together when one is peeled away from the other at a controlled angle and speed.

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Basic idea

• In a peel test, a flexible material (like enamel) bonded to magnet wire is pulled back while the force required to separate them is continuously measured.​

• The test outputs values such as maximum peel strength, initial peak force to start peeling, and average force during peeling, often normalized as peel strength per unit width.​

What it is used for

• Peel tests are widely used for quality control and product development in electronics, automotive and aerospace, to ensure the joints between wire and enamel are strong and reliable.​

• They help compare enamels, verify that the bonding meet standards, and diagnose why bonded joints fail in service.​

How it is performed

• A sample of enamelled wire is prepared and then clamped in a testing machine that pulls the flexible layer at a defined angle (commonly 90° or 180°) and speed while recording the peel force.​

• The test usually continues until a specified amount of enamel has been peeled of the wire, and the recorded force–displacement data are used to calculate peel strength.​

You can read more about our Peel Tester in the datasheet by clicking here

Please get in touch with our sales department for more information.