HuiNuo QTX paint film resilience tester

QTX

Paint film resilience tester

In accordance with the GB1731 standard, there are seven steel shaft rods of different diameters for testing the flexibility of the paint film.

QTX Paint Film Elasticity Tester (according to national standard GB1731-79)

It is used to determine the flexibility of paint film.

The paint film is applied to a sheet metal and bent on shaft rods of different diameters (mm) to determine the flexibility of the paint film.

The measurement was carried out at 22±1 °C and the relative temperature was not more than 70%.

1. Equipment and utensils:

(1) The paint film elasticity tester (as shown in the figure) is composed of seven steel shaft rods of different thicknesses and calibers, which are fixed on the seat frame, and the seat frame can be nailed to the table side of the test bench with screws.

The dimensions of the shaft rods are as follows:

   The length of each shaft rod is 35 mm

   Shaft rod 1 diameter 15 mm

   Shaft rod 2 diameter 10 mm

   Shaft rod 3 diameter 5 mm

   Shaft rod 4 diameter 4 mm

   The shaft rod has 5 cross-sections of 3*10 mm, and its radius of curvature is 1.5 mm

   The axle rod has 6 sections of 2*10 mm, and its radius of curvature is 1 mm

   The axle rod 7 has a cross-section of 1*10 mm, and its radius of curvature is 0.5 mm

(2) Iron plate: thickness 0.2~0.3 mm, size 20*100~150 mm.

2. Steps of operation and use:

Polishing the iron plate with an abrasive cloth or emery paper No. 0, and wiping it with rosin perfume, and applying paint on the iron plate in the sample preparation method, or according to the provisions of the product standard of the sample.

If the product standard allows, the iron plate can also only be wiped with rosin perfume, no need to polish, after the paint film is dried, or according to the specified time of the product standard, the sample is pressed on the shaft rod 1 with a diameter of 15 mm, the paint film is facing up, the shaft rod is bent 180 °, and the time for bending is 2~3 seconds for 90 ° on the left and right.

If the paint film is bent and observed with a quadruple magnifying glass, if there is no crack or peeling, it is bent and observed on each shaft rod of 10, 5, 4, 3, 2, and 1 mm in order. In the process of testing, when the paint film is not cracked or peeled off with a 4x magnifying glass, the minimum diameter of the shaft rod is the flexibility or elasticity index.

In general, it is possible to bend the shaft rod directly on the product standard to determine whether it is qualified. The flexibility or elasticity of the paint film can be expressed in millimeters of the shaft rod diameter.

For example:

(1) Flexibility: When the last 10 mm diameter shaft rod is bent, there is no change when it is bent on a 15 mm diameter shaft rod, and there is no change when bent on a 5 mm diameter shaft rod, a paint film crack or peeling will occur. Here, 10 mm is the minimum diameter to be passed.

(2) There is no change in flexibility when bending with a 1 mm diameter shaft rod, which means that there is no damage to the bending paint film on all shaft rods.

Paint film elasticity tester

1. R=7.5m/m steel bar

2. R=5m/m steel bar

3. R=2.5m/m steel bar

4. R=2m/m steel bar

5. R=1.5m/m steel bar

6. R=1m/m steel bar

7. R=0.5m/m steel bar

Packing list：Paint film resilience tester X1, manual

[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.