Paint knowledge | causes of floor paint blistering

Core tip: floor paint blisters often occur in the first floor or basement, sometimes above the second floor, floor paint blisters are generally found shortly after construction, and some floor paint in the morning will have blisters in the afternoon Blisters from small to large, continuous development, development to a certain extent after the stop The higher the temperature is, the more likely the blisters are to occur and develop faster Blisters vary in shape and size Some bubbles have a diameter of more than 1 m and a height of 20-50 mm There is no obvious relationship between the formation of blisters and the construction area Some of them are serious, some are lighter and some are in good condition in the same area One group operation, one material construction ring Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: floor paint blisters often occur on the first floor or basement, sometimes on the second floor or above, floor paint blisters are generally found shortly after construction, and some floor paint in the morning will have blisters in the afternoon Blisters from small to large, continuous development, development to a certain extent after the stop The higher the temperature is, the more likely the blisters are to occur and develop faster Blisters vary in shape and size Some bubbles have a diameter of more than 1 m and a height of 20-50 mm There is no obvious relationship between the formation of blisters and the construction area Some of them are serious, some are light and some are in good condition in the same area The epoxy floor layer constructed with the same material by the same group has some blisters and some are in good condition, indicating that the blisters are caused by many factors The cause of blistering is a problem of concern to everyone When the blister is cut open, it is found that there is water or inflammatory yellow liquid in the blister, the epoxy ground layer is separated from the base layer, and the cementitious material stuck on the base layer is pulled into a peak and nest shape, as shown in Figure 1-1; According to the "physics" explanation, in a closed container filled with liquid, the liquid evaporates, forming a three curve relationship between temperature and pressure in a saturated state In a closed vessel, the pressure containing saturated water vapor rises with the increase of temperature When the temperature is 20 C, the pressure in the drum is 0.01Mpa; when the temperature is 70 ~ 80 C, it rises to 0.1MPa in a straight line; In many areas, the extreme radiant heat of the ground in hot summer can reach about 70 C under such high temperature, the softening viscosity of the epoxy cement has been greatly reduced, so it is like gradually inflating air into the tire, which makes a big bag in the epoxy ground layer and pulls the cement into a honeycomb; Part of the epoxy layer without blister is not firmly adhered to the ground part If you carefully observe the contact part, you will also find that there are parts that cannot be cured, because the epoxy cannot be cured due to moisture; So where does the water come from? There are mainly the following sources of water: 1 The maximum moisture content of the base course, such as cement mortar leveling layer, is about 12%, and the maximum moisture content of the base course is greater than that of the leveling layer 2 There is not enough dehydration in other ingredients of epoxy 3 During the construction of epoxy and base course, the gap and the chemical activity of epoxy itself are not well combined, and the residue or gas is not fully cured or is not fully cured in case of moisture 4 Wet gas infiltrating underground of base course 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,