Coatings effective ways to reduce the surface tension

Conventional coating contains large amounts of solvent , relatively low surface tension . For example , a typical automotive coating, the surface tension of about 26mN / m. The traditional polyester enamel surface tension 31.5mN / m, so the traditional paint rarely encountered various problems due to the above-mentioned high surface tension caused . Only a very low surface tension substrates - such as polyethylene or polypropylene plastic , will encounter the problem of wetting of the substrate .Washi tape

However, since the surface tension of the coating solids , with the increase of the increase , and therefore the synthetic resin coatings , especially high solids paints , since the film has become the main component of the material , and relatively high surface tension , Sellotape

and a significant reduction in the proportion of the solvent , a solvent with limited , but also to reduce the surface tension of the resin solution to the lowest possible limit. This requires very strict selection of the surface tension of the solvent , a solvent of low surface tension can be formulated into coatings obtained relatively low surface tension.Masking tape


Therefore , we choose the composition of the solvent formulation , in addition to considering solubility , viscosity, evaporation rate and other factors , the surface tension of the solvent are also important factors . Under the premise of balancing various factors , it should try to use a solvent with low surface tension values. I believe that with the development of the coatings industry , surface tension effects are more and more people are concerned .Wholesale masking tape