QAG type flowability tester

1QAG type flowability testerScope of application

This standard specifies the method for determining the relative flowability of paint;This standard is not applicable to testing the flowability of varnish and powder coatings.

2、 Reference standards

Sampling of GB3186 Coating Standard

3、 Instruments and materials

1. Flow hanging experimental apparatus

QAG type flowability testerThree multi groove scrapers (testing range: 50275um; 250475um; Composed of 450675um and a base.

Each scraper can scrape the paint to be tested into 10 parallel wet films of different thicknesses. The width of each wet film is 6mm, the distance between the strips is 1.5mm, and the thickness between adjacent strips is 25um.

The base is a flat steel component with scraping guide edges and glass test panel blocks.

2. Test board

A glass plate or other agreed test plate with a smooth surface of 200 * 120 * 23mm.

4、 Experiment

1. Test conditions: temperature of 23 ± 2 ° C, relative humidity of 50 ± 5%；

2. Sampling: according to GB3186;

3. The flowability tester and test panel should be kept clean and dry;

4. Sampling Procedure

(1) Place the base of the testing instrument on a platform, place the test panel in the appropriate position on the base, and place the scraper at the top of the test panel with the scale facing the operator.

(2) Stir the sample thoroughly, place a sufficient amount of sample at the opening in front of the scraper, hold both ends of the scraper with both hands, and ensure that one end is always in close contact with the guide edge, smoothly and continuously scraping and pulling from top to bottom, while keeping it straight and without undulations. Complete this operation process in approximately 2-3 seconds.

(3) The test panel with scraped coating should be immediately placed vertically, and the strip film should be placed horizontally to maintain a thin top and thick bottom.

(4) After the coating surface dries, observe its sagging situation. If the thickness of the coating does not flow into the next thickness of the coating, it is considered that the coating of that thickness is not sagging. The area within 20mm at both ends of the coating is not counted.

5、 The results indicate

Conduct parallel tests on three samples of the same style. The test results are expressed in micrometers as the thickness of the wet film without sagging, measured on no less than two samples.