Defoaming and printing effects
At present, the most popular dyeing technology in the world is paint printing. Due to the characteristics of this process, the defoamer must have excellent defoaming and anti-foaming effects. The leveling of the printing paste has an impact on the flatness of the surface. If we want to get a good solution to the scraper experiment, we must start with the study of the defoamer. The performance of our emulsion printing paste defoamer mainly depends on the selection of the main defoaming and anti-foaming components and emulsifiers. The different types, proportions and dosages of emulsifiers will directly affect the performance of Tianjin defoamers. This paper develops the RD series of paint printing paste defoamers through the study of different combinations of emulsifiers. Certain low-molecular substances that can be fully mixed with the solution can solubilize the foaming surfactant and reduce its effective concentration. Low-molecular substances with this effect, such as alcohols such as octanol, ethanol, and propanol, can not only reduce the surfactant concentration on the surface layer, but also dissolve into the surfactant adsorption layer, reduce the tightness between the surfactant molecules, and thus weaken the stability of the foam. At present, in addition to the use of cathodic protection and corrosion inhibitors to provide corrosion protection for oil pipes, coatings are gradually being accepted by people due to their economy and effectiveness, and have become one of the effective ways to prevent pipe corrosion. Since bubbles are easily generated during the mixing, construction and curing process of the coating, if the bubbles cannot be eliminated, they will remain in the coating after curing and become defects, thus providing a channel for the entry of corrosive media. At present, there are many studies on defoaming agents, most of which start from the defoaming mechanism and the influence of defoaming agents on the construction performance of coatings. There are still few literatures that consider the defoaming effect of defoaming agents from the perspective of corrosion. For the foaming liquid that produces a stable foaming liquid by the interaction of the double electric layer of the surfactant of the foam, adding ordinary electrolytes can disintegrate the double electric layer of the surfactant to play a defoaming role.
