Rubbing Color Fastness Tester is a test instrument for the rubbing test of plastic parts, which is a test equipment developed and produced by QINSUN.

Rubbing Colour Fastness Tester is a test instrument for testing plastic parts.

The scratching head acts on the surface of the specimen with a certain pressure, the scratching head and the test specimen make relative movements at a certain speed, the trajectory is generally straight or circular, when the material is not enough to resist external scratching plastic deformation occurs, the surface of the material is destroyed. The scratching head, the load (pressure) and the relative motion of the sample and the scratching head fundamentally determine the method of scratching resistance testing. Firstly, the material, shape and size of the scratching head are key factors in determining the scratching test method. The common scuffing head is a hemispherical or spherical steel material, which is thermally treated to meet certain hardness requirements, with a diameter of 1mm, 0.75mm or 0.5mm; secondly, the load, i.e. the pressure applied by the scuffing head to the material surface, is also a very critical parameter, which characterises the severity level of the test. Different methods of scratch resistance testing have different loading methods, such as weight loading, lever loading and compression loading; the relative movement of the scratch head and the material, such as speed and stroke, are less important parameters than the scratch head and the load. In the early days of scratch resistance testing, manual operation was used, which did not guarantee a consistent test speed, but with the development of instrumented scratch resistance testing equipment, the test speed can be kept constant and the repeatability and reproducibility of the test has been improved.

The influence of material and surface parameters on the scratch performance of Rubbing Colour Fastness Tester.

Polymer material scratching performance experiments and the need to use the limit element digital simulation technology as an aid, we found in the test the impact of polymer material surface parameters, so according to the material surface parameters of the gua shed performance in terms of impact is as follows: first of all, the material in the Poisson on the material scratching the impact of negligible. Polymer material scraping performance and material modulus of elasticity is not necessarily linked, but the greater the modulus of elasticity under the influence of temperature the greater the influence of scraping nature of the material. Increasing the yield of a material can reduce plastic deformation and increase the scratch resistance of the material. The lower the coefficient of friction on the surface of a polymer material, the better the scratch resistance. The surface texture of a polymer material has a strong influence on the coefficient of friction and can be changed to improve the scratch resistance of the material. However, the surface texture can play a good role in hiding the scratch marks, which is a great reference for the surface repair of the car. It is important to strengthen the material composition for scratchability in the analysis of material and surface parameters.