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Powder coating is a kind of surface treatment technology using dry powder form of coating, uniformly adsorbed on the surface of the workpiece under the action of static electricity, after high temperature curing to form a strong and durable coating. Due to its environmental protection, high efficiency and high quality characteristics, this technology is widely used in many industries such as automotive, construction and electronics.
Composition
Polyvinyl chloride (PVC) or polyethylene (PE) resin.
Resin: such as epoxy resin, polyurethane resin, acrylic resin, etc.
Curing agent: such as triple glycidyl isocyanate (TGIC), imidazole curing agent, etc.
Pigments: Includes inorganic pigments and organic pigments.
Fillers: such as calcium carbonate, aluminum hydroxide, etc.
Auxiliaries: such as defoamer, flow auxiliaries, etc.
Leveling agent: such as silicone oil, acrylic polymer, etc.
Classification
1. Classified according to the type of film forming resin
Thermoplastic powder coatings: This type of coating uses a thermoplastic resin as a film forming substance, which melts after heating and solidifies after cooling. Common varieties include polyethylene, polypropylene, polyvinyl chloride, polyamide and so on.
Thermosetting powder coating: This type of coating is based on a thermosetting resin, which needs to be added with curing agent and heated to form a hard network crosslinked coating. The main varieties are epoxy resin, polyester, polyurethane and acrylic resin.
2. Classified by coating method
Electrostatic spraying powder coating: The powder is adsorbed on the surface of the workpiece using the principle of electrostatic attraction, which is suitable for the painting of various complex shapes of the workpiece.
Fluidized bed dip powder coating: The powder is evenly coated on the workpiece by the fluidized bed, suitable for large and mass production of the workpiece.
Electrostatic fluidized bed powder coating: The combination of electrostatic spraying and fluidized bed technology to improve the coating efficiency and coating uniformity.
Air spray and flame spray powder coatings: Powered by air and flame, respectively, for specific process requirements.
Ultraviolet curing powder coating: The use of ultraviolet radiation curing quickly, with high efficiency, environmental protection characteristics.
Applications
● Automotive industry: By using Granuwel in body coating, parts painting, vehicle repair and maintenance, you can ensure corrosion and weather resistance of the finish.
● Construction industry: From aluminium profiles and window frames, steel and metal structures to interior and exterior finishes, Granuwel offers solutions that enhance weather resistance and aesthetics while resisting wear, cleaning and corrosion.
● Mechanical and electrical industry: all kinds of mechanical equipment, instrumentation, pipelines and storage tanks and other industrial equipment and ordinary household appliances shell to functional protection, Granuwel can provide a rich choice of colors, to achieve good decorative effect, but also to improve wear resistance and corrosion resistance.
● Outdoor facilities: parks and rides, outdoor furniture, railings and fences, etc., are all weather-resistant and aesthetically pleasing through the use of powder coatings.
Advantages of GRANUWEL Twin Screw Extruders in the Production of Power Coating
1. Uniform mixing:
Twin-screw extruders can achieve uniform mixing of highly filled powder coatings, ensuring consistency in color and quality.
2. Precise temperature control:
Twin-screw extruders can achieve precise temperature control, helping to maintain stable physical and chemical properties of powder coatings.
3. High output:
Twin-screw extruders have a high output, which can meet the needs of large-scale production.
4. Low energy consumption:
Compared with other types of extruders, twin-screw extruders have lower energy consumption, helping to reduce production costs.
5. Good self-cleaning:
Twin-screw extruders have good self-cleaning properties, which can reduce downtime and improve production efficiency.
6. Flexible process adjustment:
Twin-screw extruders can be adjusted flexibly according to different product requirements to meet diverse market demands.
7. Continuous production:
Twin-screw extruders can achieve continuous production, improving production efficiency and output.
8. Wide application range:
Twin-screw extruders are suitable for the production of various powder coatings, such as epoxy, polyurethane, acrylic, etc.