Characteristics And Classification Of Powder Coating & Painting
Powder coating is a new type of solvent-free 100% solid powder-like coating. With solvent-free, pollution-free, recyclable, environmental protection, energy saving and resources, reduce labor intensity and film mechanical strength of high quality.Powder Coating & Painting
Powder coating is completely different from the general coating of the form, it is in the state of fine powder exist. Because the solvent is not used, it is called powder coating. The main characteristics of powder coatings are: harmless, high efficiency, saving resources and environmental protection.
It has two main categories: Thermoplastic powder Coatings and thermosetting powder coatings. Thermoplastic powder coatings are made of thermoplastic resins, pigments, fillers, plasticizers and stabilizers. Thermoplastic powder coatings include: polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide series, Cellulose series, polyester system. Thermosetting powder coatings are composed of thermosetting resins, hardener, pigments, fillers and auxiliaries. Thermosetting powder coatings include: Epoxy system, polyester system, acrylic resin system.Powder Coating & Painting
Disadvantages: Uneven powder on the corners, after curing coating defects difficult to cover up, curing conditions high.The classification standard is many, the name of each kind of powder on the market is uneven. According to the properties of film-forming materials are divided into two main categories: Thermoplastic powder Coatings and thermosetting powder coatings. Or the appearance of film-forming materials are divided into: extinction type, high light type, fine art type. can also be divided into the use of the environment: indoor and outdoor type of two major categories. Characteristics: 1, the product non-toxic, solvent-free and non-toxic substances, so no poisoning, no fire, no "wastes" emissions and other public nuisance problems, fully in line with the national Environmental protection law requirements. 2, high utilization of raw materials, a number of well-known brands of powder suppliers to produce powder, the powder can be recycled, the highest utilization can even reach more than 99%. 3, the coating before treatment, one-time construction, without the bottom coating, you can get enough thickness of the coating, easy to automate operation, high production efficiency, can reduce costs. 4, coating density, adhesion, impact strength and toughness are good, corner coverage is high, with excellent resistance to chemical corrosion and electrical insulation performance. 5, Powder coating storage, transportation safety and convenience.
Powder spraying construction technology and requirements: the so-called powder electrostatic spraying is the use of High-voltage electrostatic corona electric field principle. A high voltage negative electrode is connected with the metal diversion mark on the head of the spray gun, the spraying workpiece is grounded to form a positive electrode, and a strong electrostatic field is formed between the spray gun and the workpiece. When the compressed air is used as the carrier gas, the powder coating is sent from the powder tube to the spraying rod of the spray gun, and a dense negative charge is generated in the vicinity of the electrode because of the corona discharge produced by the high voltage cathode of the guide rod. The powder is negatively charged, and it enters the electrostatic field with high electric field intensity, and under the double action of static power and carrying gas, the powder can fly evenly to the surface of the grounding workpiece to form a powder layer with uniform thickness, and then heat and solidify into durable coating. Pre-treatment of coating construction process one drying to remove moisture a spray one Check one bake one check a finished product construction requirements general powder spraying construction requirements Powder Coating & Painting