Common knowledge of coating: excellent decoration and anti-corrosion effect; high construction requirements for powder coating

It is suggested that the powder coating is a new type of solvent free 100% solid powder coating It has two major categories: thermoplastic powder coating and thermosetting powder coating The coating is made of special resin, pigments and fillers, curing agent and other additives, mixed in a certain proportion, and then prepared by hot extrusion, crushing and sieving Under normal temperature, they are stored stably After electrostatic spraying or fluidized bed dip coating, they are heated, baked, melted and solidified to form a smooth and bright permanent film, so as to achieve the purpose of decoration and anti-corrosion 　 Characteristic: 1 The product does not contain toxicity, solvents and volatile toxic substances, Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Coating home news: powder coating is a new type of solvent-free 100% solid powder coating It has two major categories: thermoplastic powder coating and thermosetting powder coating The coating is made of special resin, pigments and fillers, curing agent and other additives, mixed in a certain proportion, and then prepared by hot extrusion, crushing and sieving Under normal temperature, they are stored stably After electrostatic spraying or fluidized bed dip coating, they are heated, baked, melted and solidified to form a smooth and bright permanent film, so as to achieve the purpose of decoration and anti-corrosion Features: 1 The product does not contain toxicity, solvents and volatile toxic substances, so there is no problem of pollution such as poisoning, fire and discharge of "three wastes", which fully meets the requirements of national environmental protection law 2 The utilization rate of raw materials is high, and the over sprayed powder can be recycled, and the utilization rate is more than 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 Coating construction process: pretreatment → drying to remove 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 coating is first treated strictly before the surface (2) When spraying, the coated object must be completely grounded to increase the spray efficiency of powder coating (3) For the coated objects with large surface defects, conductive putty shall be applied to ensure the smoothness and smoothness of the coating (4) after spraying, the objects shall be heated and solidified The curing conditions shall be subject to the technical indicators of powder products, but the curing temperature and time must be fully guaranteed to avoid quality accidents caused by insufficient solidification (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 The electrostatic voltage should not be too high, generally controlled at about 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 The storage and use of powder coating 1 Keep away from the fire source and avoid direct sunlight It should be placed in a well ventilated place with a temperature below 35 ℃ 2 Avoid storage in places susceptible to contamination by water, organic solvents, oil and other materials 3 Powder coating shall not be exposed in the air at will after use, and the bag mouth shall be capped or screwed tightly at any time to avoid sundries mixing 4 Avoid long-term contact with the skin The powder attached to the skin should be washed with soapy water Do not use solvent The safety of the coating construction site and the equipment used in the coating operation shall be well grounded to eliminate static electricity 2 Avoid the phenomenon of no end discharge of coating machine 3 In the powder spraying room, the concentration of floating dust shall be controlled below the safe concentration as far as possible to avoid the risk of dust ignition and explosion 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,