The Peel Wheel Test (also known as the 'German Wheel Peel Test') is commonly used for 90-degree peel testing adhesive tapes, papers and films, and particularly when needing to separate the individual layers of laminated release coatings.
The Peel Wheel has low-friction bearings to allow free movement and is attached to the base of the test stand. The backing of the release film is attached to the wheel with double-sided adhesive tape or the adhesive face of the tape is attached directly to the wheel. The release coating is then partially peeled from its backing, or the tape is partially peeled from the wheel, to create enough material to be held in an upper vice grip. This upper vice grip is connected to the test stand crosshead and is driven vertically so that the tape or release coating is steadily peeled from the wheel or the backing at a constant speed and consistent 90-degree peel angle in accordance with test standards.