Test method for resistance of paint films to powder rubbing off by moisture

Abstract

A method for testing the wet rubbing dusting resistance capability of a paint film is carried out on an apparatus, and the apparatus has a test head which can reciprocate. The method comprises the following steps: 1, selecting a matching priming paint of a test sample, and roll-coating a substrate with the priming paint; 2, selecting the test sample of an emulsion paint, diluting, uniformly stirring, coating the priming paint possessed substrate prepared in step 1 with the above obtained paint, and maintaining to make a test plate; 3, fixing a wet flexible material on the test head, and downward applying a 200-1000g load to the test head; 4, putting the test plate made in step 2 in a test plate fixing rack, fixing, and randomly placing the test head on the test plate; 5, wiping the test head back and forth by the test head, and recording to the wiping frequency through a counter; and 6, assessing the wet rubbing dusting resistance capability of the test sample according to the residual of the white paint film on the flexible material and the loss degree of the paint film at the wiping position of the test plate after the multi-time wiping.

Description

technical field [0001] The invention relates to a test method for the ability of the paint film of latex paint to resist wet rubbing off powder. Background technique [0002] Interior wall latex paint is often polluted by some daily stains and dust. The most common treatment method is to wipe it with a wet fabric. After wiping, the degree of loss of different latex paint films is different. The ability of the paint film to withstand wear and tear, that is, the resistance to wet rub off powder. [0003] For interior wall latex paints, the ability to resist wet rub off powder is a very critical performance index. The paint film loss of exterior wall latex paint mainly comes from the influence of natural environment: ultraviolet aging, acid rain erosion, etc.; while the paint film loss of interior wall latex paint mainly comes from human factors and wiping with wet cloth. This performance can accurately reflect the durability of the paint film after construction of interior w...

AI Technical Summary

Problems solved by technology

[0004] But at present, there is no relevant national standard for the performance of anti-humidity wipe off powder, and the standards of various companies are different. Basically, wrap the towel with your fingers and wipe it back and forth on the test board manually. Such test results are relatively subjective. The test strength and back and forth There is no way to get a more objective and stable unity for the number of times and wiping speed

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