JINGKELIAN QTY-32-III Film Bending tester Instruction Manual

QTY-32-III Paint Film Bending Tester

1. Scope of Use:

The QTY-32-III paint film bending tester is mainly used to measure the flexibility of colored and varnish coating films. It is one of the main indicators for evaluating coating performance and is important for selecting paint varieties. It should be of great reference value.

The QTY-32-III type paint film bending tester is a specialized instrument for evaluating the crack resistance or peeling off metal sheets of colored paints, varnishes, and related product coatings when bent around the column shaft under standard conditions.

Complies with GB6742, ISO1519, ASTMD522, DIN53152 standards.

2. Structural Principles and Parameters:

1. Working principle

Different bending radii of coating films have varying ductility on substrates; the flexibility of coating films is judged based on different bending radii or peeling conditions.

2. Main technical parameters

The shaft diameters of the QTY-32-III paint film bending tester are 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 32 mm, respectively

Suitable test plate size: length 120---150mm, width less than 80mm

Suitable for samples with thicknesses below 1.0mm.

3. Usage and Operation:

1. Apply the coating to the metal substrate

2. Carefully apply the film and dry it to ensure good reproduction

3. During the experiment, bend the test substrate to 180 degrees with uniform force within 1-2 seconds

4. Start from the shaft bar with the largest diameter, and test the decreasing diameter until coating fracture is visible

5. To ensure the correct results, the test should be conducted at a temperature of 23±2°C and a relative temperature of 50±5%.

4. Precautions for use

1. To prevent damage to the coating during bending operations, a thin sheet of paper can be placed on the coated surface of the sample plate, then inserted between the tray and the adjustment handle for testing.

2. If using a 10x magnifying glass, the test results should be noted.

3. Using shaft rods with the smallest diameter will not cause cracking or peeling; in such cases, the diameter of the shaft rod should also be indicated.

4. If the sample is an aluminum sheet, its long side should be parallel to the rolling direction.