Common knowledge of coating: how to solve the air bubble produced by Polyurethane Construction

Core tip: problems in any process of polyurethane coating will lead to bubbles and "prickly heat" in the coating, which can be effectively prevented by formula design and coating construction In view of the causes of bubbles in the previous "defects in Polyurethane Construction", the following preventive measures are proposed 1、 Coating production process It is generally believed that the production of "prickly heat" is due to the fast drying of the coating surface, so by adjusting the volatilization speed of the solvent, the use is slow Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings news: problems in any link of polyurethane coating in the coating process will cause bubbles and "prickly heat" Through formula design and strengthening the coating construction, it can effectively prevent "prickly heat" and other film defects In view of the causes of bubbles in the previous "defects in Polyurethane Construction", the following preventive measures are proposed 1、 Coating production process It is generally believed that the formation of "prickly heat" is due to the fast drying of the coating surface Therefore, by adjusting the solvent volatilization speed and using slow drying solvent to increase the opening time of the coating film, bubbles will escape from the coating film This phenomenon will be improved, but it can not be completely solved It is necessary to fully improve the dryness of the coating film, so as to improve the solvent release of the coating film In the design of the formula, various factors should be considered, and the best combination should be selected, that is, to control the raw materials well, to avoid moisture in the filler or moisture and other impurities in the solvent, to select some materials with low foam content or unstable foam as far as possible, and to eliminate the components of stable bubbles as far as possible 2、 Site construction process In the field construction process, the paint should be prepared into a viscosity suitable for spraying according to the operation instructions After fully mixing and filtering, the paint must be kept for 8-15 minutes, and the construction can only be carried out after the small bubbles in the paint are eliminated as far as possible, so that the paint can have a proper leveling capacity, and the prepared paint should be used up within 3 hours In the spraying process, the construction personnel shall pay attention to prevent dust, sweat, etc from mixing into the paint liquid, so as to avoid coating defects 3、 Temperature and humidity control of construction environment Under high temperature and high humidity conditions, bubbles and "prickly heat" are easy to occur The environmental conditions for coating construction, such as temperature, humidity, ventilation conditions and construction humidity, shall be controlled well Construction under high temperature and humidity conditions shall be avoided The coating environment shall be dry, and the drying room shall be kept clean, ventilated and dry 4、 Pre construction treatment of base material The water content of the base material must be controlled in accordance with the coating requirements The surface of the base material must be smooth, clean and free of dust, oil, water vapor and other impurities Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,