We all know that coated or uncoated surfaces need to be tested for scrub resistance with a brush, sponge, dishcloth, sandpaper, or other means. Scrub resistance tester is a special test instrument for such tests, it can use the way of wet scrubbing by adding friction agent or cleaning agent for friction resistance test. It is usually used in the scrubbing test of interior wall paint, floor tile, shower room and furniture surface.
Principle and main structure of scrubbing tester
1, the motor through the mechanical transmission mechanism, so that the brush to do reciprocating linear motion to complete the test plate washing process.By the control circuit to realize the washing times of the setting, display, test termination function.
2, the instrument is mainly composed of motor, transmission structure, brush parts, water supply system, test plate pressing device and circuit control system.
Cleaning resistance tester test operation steps
1. Turn up the brush frame, paint the sample to be tested up, put it on the experimental table, pull up the pressure bar, and reverse the appropriate Angle after putting it down, the test plate is pressed down, and the processed brush is loaded into the brush frame.
2. Insert the power into the 220V single-phase power socket with protective grounding, press the power switch, the counter displays “0” or “1”, connect the preset count key, so that it can reach the required number of repeats.Then press the reset key.
(Note: the above sequence should not be reversed, so that the instrument is in standby state)
3. Adjust the outlet gate to add 0.04g of the washing medium per second to keep the surface of the test plate wet.
4. Press the work button to start the test. After the specified number of times, it will stop working automatically.Close the outlet door and pull up the brush holder.To complete a test procedure, remove the test plate.
Inspection and evaluation of the test board of the brush resistance tester:
1, the number of washing can be set in advance, can also be washed to test the plate in the middle of the 100mm area to reveal the number of paint color used (at this time should be preset number of select a few larger).
2. In the scattered sunlight, check the coating film in the area with the middle length of 100mm that the test board has been washed, and observe whether it is damaged and the bottom coating color is exposed.A sample to do three times equal test, in the specified number of washing at least two test plates of the film without damage, do not reveal the background color, it is considered that its washing resistance qualified.
Matters needing attention in the use of scrubbing tester:
1. In the test, it is strictly prohibited to move various buttons on the counter in order to avoid damaging the counter.
2, the test to stop, press the stop button brush will stop working.
3. During the test, especially when loading and unloading test plates and filling medium, the medium should be prevented from flowing into the instrument (especially the opening in the middle of the upper cover).If accidentally into, a small amount of time can wait for its own dry, if the amount is large, should open the upper cover will flow into the medium dry.Test pen or other means should be used before use. Do not use the surface of the instrument with electricity.
4, the bottom plate does not show the primer, and the counter has reached the predetermined value, and automatic shutdown.If you need to continue the work, just press the reset button and then press the work button, the test will start again. If you change the number of Settings, press the number key, you must press the reset button.
5. After the end of the test, all parts of the instrument should be cleaned to prepare for the next use.