Powder coatings are no stranger to people who know a lot about decoration. In fact, powder coatings are different from other coatings in addition to their constituent materials and their uses. Let’s take a look at the classification and uses of powder coatings.
Powder coating classification
Powder coating is a new type of solvent-free 100% solid powder coating. It has the characteristics of no solvent, no pollution, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. It has two major categories: thermoplastic powder coating (PE) and thermosetting powder coating. The coating is made of special resin, pigments, fillers, curing agents and other additives, mixed in a certain proportion, and then prepared through processes such as hot extrusion, crushing and sieving. They are stable in storage at room temperature. After electrostatic spraying, friction spraying (thermosetting method) or fluidized bed dipping (thermoplastic method), they are then heated, baked, melted and solidified to form a smooth and bright permanent coating to achieve decorative effects. and anti-corrosion purposes.
The two major types of powder coatings are thermosetting powder coatings and thermoplastic powder coatings. Thermosetting powder coatings can be classified into: epoxy powder coatings and polyester powder coatings. , acrylic powder coating. Thermoplastic powder coatings can be classified into: polyvinyl chloride powder, polyethylene powder coating, nylon powder coating, fluororesin powder coating, and latex powder coating.
Uses of powder coatings
1. Powder coatings for insulation
The requirements are mainly for insulation, followed by decoration. But it must have excellent heat resistance, physical and mechanical properties and flexibility.
Suitable for coating electronic components, electrical accessories and motor rotors.
2. Powder coatings for heavy-duty anti-corrosion
Mainly require anti-corrosion properties, but must have excellent anti-corrosion properties, impact strength and flexibility.
Mainly suitable for petrochemical pipelines, storage tanks, metal structures and ship accessories, etc.
3. Decorative powder coatings
The coating film must have a good appearance, not turn yellow when cured and baked, and have good physical properties. Some varieties have good weather resistance. It is suitable for household appliances, instruments, cookware, lamps, display racks and automobile parts.
4. Powder coating for construction
It requires both decoration and weather resistance, and has good physical and mechanical properties.
Suitable for building doors and windows, door locks, metal structures and pipe fittings, engineering equipment and other outdoor facilities.
5. Antistatic powder
Its performance is similar to that of insulating powder coating, and it is used in anti-static places such as computer rooms.
Precautions for using powder coatings
1. Avoid long-term contact with the skin. Powder attached to the skin should be washed clean with soapy water. Do not use solvents.
2. All equipment used in painting operations must be well grounded to eliminate static electricity.
3. Avoid unwarranted discharge from the coating machine.
4. In the powder spraying room, the concentration of floating dust should be controlled below the safe concentration as much as possible to avoid the risk of dust fire and explosion.
5. Keep away from fire sources and direct sunlight. It should be placed in a well-ventilated place with a temperature below 35°C.
6. Avoid storage in places easily contaminated by water, organic solvents, oil and other materials.
7. Do not expose the powder coating to the air at will after use. The bag should be covered or tightly closed at any time to prevent debris from being mixed in.