Coating knowledge: powder coating characteristics

Core tips: 1 The product does not contain toxicity, solvents and volatile toxic substances, so there is no poisoning, no fire, no "three wastes" emissions and other public hazards, which fully meet the requirements of national environmental protection law 2 The utilization rate of raw materials is high The powder produced by some famous brand powder suppliers can be recycled The highest utilization rate can even reach over 99% 3 After pre-treatment of the coated object, one-time construction, without primer, can get enough thickness of film, easy to achieve automatic operation, high production efficiency, can reduce costs 4 Dense coating, strong adhesion and impact resistance 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 Home of coatings news: 1 The product does not contain toxicity, solvents and volatile toxic substances, so there is no poisoning, no fire, no "three wastes" emissions and other public hazards, fully in line with the requirements of the national environmental protection law 2 The utilization rate of raw materials is high The powder produced by some famous brand powder suppliers can be recycled The highest utilization rate can even reach over 99% 3 After pre-treatment of the coated object, one-time construction, without primer, can get enough thickness of film, easy to achieve automatic operation, high production efficiency, can reduce costs 4 The coating is compact, with good adhesion, impact strength and toughness, high corner coverage, excellent chemical resistance and electrical insulation 5 The storage and transportation of powder coating are safe and convenient Powder spraying construction technology and requirements: the so-called powder electrostatic spraying is to use the principle of high voltage electrostatic corona electric field A high voltage negative electrode is connected to the metal guide sign at the head of the spray gun, and the sprayed workpiece is grounded to form a positive electrode, so as to form a strong electrostatic field between the spray gun and the workpiece When the powder coating is sent from the powder supply barrel to the guide rod of the spray gun by the compressed air as the carrier gas, because the guide rod is connected with the corona discharge generated by the high-voltage negative pole, a dense negative charge is generated near the guide rod, which causes the powder to carry the negative charge and enter the electrostatic field with high electric field strength Under the double action of electrostatic power and carrier gas, the powder flies to the ground evenly A thick and even powder layer is formed on the surface of the workpiece, and then heated and solidified to form a durable coating Pretreatment of coating construction process - drying and removing moisture - spraying, inspection, baking, inspection - finished product construction requirements general powder spraying construction requirements (1) in order to make the characteristics of powder coating give full play to and extend the service life of the coating film, the surface of the coated object shall be subject to strict surface pretreatment first (2) When spraying, the coated object must be completely grounded to increase the spray efficiency of powder coating (3) For the coating with large surface defects, conductive putty shall be applied to ensure the smoothness and smoothness of the coating (4) After spraying, the object shall be heated and solidified The curing conditions shall be subject to the technical specifications of powder products, but the curing temperature and time shall be fully guaranteed to avoid quality accidents caused by insufficient curing (5) Check immediately after powder spraying If any defect is found, it shall be handled in time If any defect is found after curing, the scope is small and only local, and it will not affect the surface decoration of the coated object It can be repaired after diluting with the same color powder and acetone If the scope is large and it also affects the surface quality, polish with sandpaper, spray again or remove the coating with paint remover, and then re Suo powder (6) The recycled powder must be screened to remove impurities and mixed with new powder in a certain proportion (7) The powder supply barrel, powder spraying room and recovery system should avoid the pollution of other powder of different colors, so they should be cleaned every time when changing colors 2 Construction requirements for fine arts powder spraying: Fine Arts powder, with the characteristics of beauty, strong three-dimensional sense, decorative effect, etc., but its construction process is strictly required (1) When spraying powder, the input air pressure should not be too large Generally, it is better to control it at 0.5-1.5kg/cm2 Too much air pressure will cause poor pattern definition or some pockmarks Static voltage should not be too high, generally controlled at 60-70kv If the voltage is too high, the powder attached to the surface of the workpiece will rebound and appear pockmarks Defects such as poor leveling (2) When spraying powder, pay attention to the thickness of the film Generally, 70-100 μ M can help to form obvious pattern and larger pattern If the film is thin, the pattern is not obvious, and the pattern is also small At the same time, there will be defects such as pitting and exposed bottom (3) Curing must be carried out according to the specified temperature and time If the temperature is too low and the time is too short, the powder will not form a pattern, and the mechanical properties will be greatly reduced due to incomplete curing In addition, due to the particularity of the production process of art pattern powder, the pattern will be smaller or not obvious change after re spraying with recycled powder, so it is generally recommended not to use recycled powder of art pattern powder It has to be tested if it is to be used From the above point of view, although the construction requirements are strict, it is believed that as long as the above factors are well grasped in the coating process, the ideal satisfactory effect will be achieved 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,