Coating classification: crack powder coating

Brief introduction: crack powder coating belongs to thermosetting powder coating Crack powder coating not only has many advantages of thermosetting powder coating, but also can form beautiful crack pattern after coating, which is natural, elegant and simple, and can be adjusted according to the shape of workpiece and the size of crack shape Crack powder coating is widely used in toys, crafts and other fields Crack powder coating uses the changes of melting viscosity, surface tension and curing speed of powder coating during baking and curing to cause the shrinkage of coating surface and form crack effect The usual way to form cracks: can increase Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Brief introduction: crack powder coating belongs to thermosetting powder coating Crack powder coating not only has many advantages of thermosetting powder coating, but also can form beautiful crack pattern after coating, which is natural, elegant and simple, and can be adjusted according to the shape of workpiece and the size of crack shape Crack powder coating is widely used in toys, crafts and other fields Crack powder coating uses the changes of melting viscosity, surface tension and curing speed of powder coating during baking and curing to cause the shrinkage of coating surface and form crack effect Generally, the way to form cracks: the amount of filler can be increased or the amount of base material can be reduced Generally, the filler with high oil absorption is selected to prevent the normal flow of resin during film formation, so that the resin can not completely cover or just cover the particles of the pigment and filler, and there is no redundant resin to fill the gap between the particles of the pigment and filler, so as to form a three-dimensional knot with the pigment and filler as the skeleton The color of the primer is exposed at the crack Main properties: the main properties of crack powder coating are shown in the table below Test item index gloss /% 65 adhesion / grade 0 hardness h appearance stereo sense is strong, the crack obviously affects the shape of the crack size factors: different bottom powder system, the formation of the crack is also different, if need to see a clear crack in a large space, should choose a resin with a lower viscosity, conducive to flow In the same system, the size and shape of the cracks will be affected by the different content of pigments and fillers The general rule is that with the increase of the content of pigments and fillers, the spray cracks will transition from coarse and large cracks to relatively small cracks Construction precautions: ① in the process of powder coating construction, try to spray the powder coating on the surface of metal workpieces evenly, the thickness of the coating shall be uniform and appropriate, too thick will cause blurred crack boundary; too thin will easily cause problems such as exposed bottom, shrinkage cavity, etc.; ② it is recommended that the spraying sequence be from high to low First spray the secondary surface, then spray the main surface It is better to finish the spraying at one time Some dead corners need to be partially repainted, which will make some of the original cracks disappear; ③ to achieve the best spraying effect, before construction, the materials are screened with a slightly larger screen, and the process parameters such as the air pressure of powder, atomization pressure, distance between the nozzle and the workpiece, removal speed of the spray gun and so on are adjusted by the powder supply device of the fluidized bed system, which is the best effect ④ In the application of powder crack coating, it is necessary to prevent them from polluting other types of coating If possible, it is better to use two sets of equipment separately ⑤ During electrostatic spraying, the effect of thermal spraying on the workpiece is better than that of cold spraying As the thermal spraying is that the powder coating melts rapidly as soon as it contacts the workpiece, the coating starts convection immediately (if it contains metal pigment, the pigment floats), so that it has enough time to rotate to the best reflective angle If cold spraying is used, because the heat capacity of the workpiece is large (especially the thicker material), it will take a long time for the temperature of the chamber to rise to the curing temperature, that is to say, the resin is in high viscosity for a long time, and the internal resistance hinders the formation of the texture If the gelation time of the coating is short, it will gradually gelatinize during the heating process, and when the curing temperature is reached, the coating has formed Gel can not form textures 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,