QFH cross-cut Tester QFH-A600 JFL Adhesion Tester organic coating adhesion

Introduction

JFL QFH-A600 cross-cut knife is a testing tool for measuring the adhesion performance of paint films by means of cross-hatch method. QFH-A600 Baige knife adopts hard alloy steel blade, which has strong advantages in hardness and wear resistance, and can achieve the same effect as imported high-quality blades, with complete marking. QFH-A600 Baige Knife is a hand-held Baige Knife, which is easy to carry and can be used in laboratories and various construction site environments.

Applications

The QFH-A600 cross-cut knife is suitable for the determination of the adhesion of organic coatings by the cross-cut method. The QFH hundred-grid knife can be widely used in coatings, paints and other fields.

Principle of Baige knife

The QFH hundred grid knife is a tool with a certain specification, which cuts the coating into a grid pattern and penetrates the coating. The graphics completed by the crossing must be classified according to six levels, so as to evaluate the adhesion performance of the coating, that is, from Adhesion effect on substrate separation.

Operation method

1. Prepare sample test pieces according to the provisions of ISOR1514 and ISO2828.

2. Place the prepared sample test piece on a flat surface with sufficient hardness.

3. Hold the handle of the QFH-A600 hundred grid knife, and make the multi-blade cutting knife perpendicular to the plane of the test piece.

4. Maintain uniform pressure, steady and non-vibrating method, and cut at a cutting speed of 20-50mm/S.

5. Rotate the test piece by 90°, and repeat the above operation on the incision made with a QFH-A600 hundred grid knife to form a grid pattern.

6. Use a soft brush to brush the diagonal lines on both sides of the grid pattern and gently brush the test piece backward 5 times and forward 5 times.

7. The test of QFH-A600 hundred grid knife is completed at least in three different positions of the test piece. If the test results of the three positions are different, the test should be repeated in more than three positions and record all the results at the same time.

8. If you need to replace the multi-blade cutting knife, you can use a screwdriver to loosen the two screws on the knife body, replace it with the knife you are using, stick the edge of the knife to the side of the handle, and tighten the screws.

Precautions for use

1) The test environment of QFH-A600 Baige knife should be in the temperature of 23±2℃ and the Relative Humidity of 50±5%.

2) All cuts should penetrate the coating, but not too deep into the substrate.

3) Use the 600-1PK test special tape of 3M in the United States. Stick the tape on the entire grid, and then tear it off at the smallest angle. The test result can be obtained according to the proportion of the area of the paint film surface being glued .

4) If the coating is too thick or too hard so that the QFH-A600 hundred grid knife cannot penetrate the substrate, the experiment is invalid.

Pictures

Cross-cut tester x1, carbide steel blade x2, magnifying glass x1, brush x1, 3M600 tape x1, hexagonal spanne x1, manual x1, instrument case x1

[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.