Bend test – Qualicoat Testing

All organic coatings except class 2 and 3 powder coatings: EN ISO 1519

Class 2 and 3 powder coatings:
EN ISO 1519 followed by a tape pull adhesion test as specified below:

Apply an adhesive tape to the significant surface of the test panel following the mechanical deformation. Cover the area by pressing down firmly against the coating to eliminate voids or air pockets. Pull the tape off sharply at right angles to the plane of the panel after 1 minute.

The test shall be performed on an organic coating with a thickness approximating the minimum required.

In case of a negative result, the bend test shall be repeated on a panel coated with a thickness of

• Class 1 and 2: 60 to 70 μm
• Class 3: 50 to 60 μm

REQUIREMENTS:

Bending around a 5 mm mandrel for all organic coatings except for two-component and water-thinnable liquid coatings. For these, use an 8 mm mandrel.

Using normal corrected vision, the coating shall not show any sign of cracking or detachment, except for class 2 and 3 powders coatings.

Class 2 and 3 powders coatings:
Using normal corrected vision, the organic coating shall not show any sign of detachment following the tape pull adhesion test.