Explore the determination of sanding property of paint film and putty

In the application of coatings and putties, the smoothness of the surface often determines the overall effect and mass. And this smoothness is often closely related to sanding. Sanding refers to the difficulty of a smooth matte surface produced by a paint film or putty layer after dry or wet grinding of Abrasive materials such as sandpaper or pumice. It not only affects the construction mass and efficiency, but is also a crucial performance indicator for primers and putties.

Evaluation method:

In order to objectively evaluate sanding, a common method is to use the Abradability Tester. This instrument is designed to evaluate the sanding performance of primer and putty. During this process, the sample will be sanded back and forth, and the number of sandings will be recorded by a counter. By observing the surface phenomenon of the sample after a certain number of sandings, the sanding performance of the paint film or putty is evaluated.

Instruments and Materials:

In this process, water sandpaper is an indispensable tool. At the same time, the Abradability Tester also plays a key role. It sanding the sample back and forth through the grinding head, and the counter will record the number of sandings. In this process, the load weight and the number of sandings together with the degree of abrasion constitute the evaluation criteria. In addition, manual methods can also be used for sanding tests. Use water sandpaper to rub evenly on the template. When hand sanding, ensure that the force is uniform and the sanding speed is moderate.

View the mass from the results:

After the test, by observing the three samples, two of the samples with similar performance are generally selected for evaluation results. In this process, attention is paid to whether the surface is uniform, smooth and dull, and whether there are particles that cannot be worn off or heat becomes soft. This evaluation result will be judged according to whether it is qualified or not as specified in the product standard.

Guidance on mass standards:

The national standard GB/T 1770-2008 provides specific guidance and specifications to help us accurately test and evaluate sanding. Following this standard not only guarantees the accuracy of the test, but also provides guidance for the production of Coatings and putties to ensure that they perform well in practical applications.

To summarize:

The evaluation of sanding is very important for the application of Coating and putty. Through the guidance of instruments and standards, we can accurately evaluate the sanding performance of products and provide a basis for the manufacture and application of products. The mass and Appearance of paint film and putty are often closely related to sanding. Only through scientific evaluation methods can we ensure the best application effect.