PP plastic is a non-polar substrate. Therefore, when spraying or gluing, it is necessary to use Shizukawa PP primer to enhance the adhesion between the substrate and the paint, and between the substrate and the glue. Solve the problem of paint peeling or degumming.
? The function of primer: Primer is usually also called primer treatment agent or primer adhesion treatment agent. It usually has a certain film thickness (of course, some primers are (without film thickness), it can be applied to the surface of the substrate by spraying or brushing, which can moisten the substrate and at the same time help enhance the bonding force between the substrate and paint or glue to improve reliability. Common primers include: nylon primer, PP primer, metal primer, etc. What should I pay attention to when using primer? 1. Because primer is a surface treatment technology developed based on the properties of the substrate, it is necessary to determine the properties of the substrate before use. Different molecular structures require different primers to be selected for different substrates. 2. Before spraying or painting the primer, the surface of the substrate needs to be cleaned, so the residue of some release agents or cleaners will prevent the primer from functioning properly. 3. If the primer is baked during use, the increase in temperature can increase molecular activity and have a beneficial effect on adhesion (it is generally recommended to bake at 60-70°C for 3-5 minutes)