Coating process: common problems in coating orange peel

Core tip: orange peel phenomenon is an inevitable phenomenon after coating After the paint film, there are orange peel The surface without orange peel is as bright as a mirror But the paint film orange peel data on the high side will have poor visual effect and uncomfortable to see Causes of orange peel: (1) The paint formula is not adjusted to the best; (2) During the construction, the viscosity is too large and the paint stretches and flows slowly; the diameter of the spray gun is too small and the distance between the spray gun and the workpiece is not suitable, which results in large paint mist particles and affects the leveling of the paint; the spraying pressure is too large and the high-pressure particles impact, resulting in uneven paint film; (3) Solvent volatilization rate Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: orange peel phenomenon is an inevitable phenomenon after paint coating After the paint film, there are orange peel The surface without orange peel is as bright as a mirror But the paint film orange peel data on the high side will have poor visual effect and uncomfortable to see The causes of orange peel: (1) the paint formula is not adjusted to the best; (2) the viscosity is too large during construction, and the paint stretches and flows slowly; the diameter of the spray gun is too small, and the distance between the spray gun and the workpiece is not suitable, resulting in large paint mist particles, which affects the leveling of the paint; the spraying pressure is too large, high pressure particles impact, resulting in uneven paint film; (3) Fast solvent volatilization, over ventilation, high temperature of the coating, which hinders the leveling of the coating; (4) too high or too low construction temperature will affect the leveling of the coating; too high temperature, too fast solvent volatilization, which is not conducive to leveling; too low, the paint in the liquid paint film is high viscosity, which is not conducive to leveling; (5) too early into the high-temperature oven for drying; (6) The surface of the coating is not smooth, which affects the leveling of the coating or the absorption of the coating Solutions: (1) add appropriate leveling agent or adjust the formula; (2) control appropriate construction viscosity (14-18s), spray gun pressure (0.3-0.4) × 105Pa, exhaust speed (0.2-0.4m / s), distance between spray gun and workpiece (20-30cm) and other controllable conditions; (3) Increase the proportion of high boiling point solvent in diluent; control the appropriate construction environment temperature (20-30 ℃) and ventilation conditions, and the temperature of the coating should be below 50 ℃; (4) control the construction temperature; (5) Pay attention to construction skills, carry out correct construction, control the thickness of paint film, and ensure sufficient drying time and leveling; after a period of time, dry the dry type paint film from low temperature to high temperature as required; (6) The substrate shall be treated strictly, but the roughness shall not be too large; for the bottom layer with strong absorption, a layer of primer shall be applied first to make it smooth; for the paint film with orange peel, the trace shall be ground with fine sandpaper, and then a layer of finishing coat shall be applied after removing the dust 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,