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Appearance identification How to identify powder coating?
1. The hand feels silky and smooth, fluffy and floating Rough and heavy hand feel Grab a handful of powder in your hand, the smoother and more fluffy the powder, the better the quality. On the contrary, the rough and heavy feel of the powder results in poor quality Not easy to spray, with a lot of secondary powder drop and high waste
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Precautions when using powder coatings
1. Keep away from fire sources and avoid direct sunlight. Place in a well ventilated area with a temperature below 35 ℃.
Construction requirements for powder coatings
Electrostatic spraying (refer to the coating process of powder coatings for details)Surface treatment of the coated material → Electrostatic powder coating → Melting leveling or cross-linking curing → Cooling → Product
Manufacturing process of powder coating
Coatings are prepared by mixing special resins, pigments and fillers, curing agents and other additives in a certain proportion, and then through 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 heated and baked to melt and solidify to form a flat and bright permanent coating film to achieve decorative properties. and anti-corrosion purposes.
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Classification of powder coatings
Thermoplastic powder coatings are composed of components such as thermoplastic resins, pigments, fillers, plasticizers, and stabilizers. Thermoplastic powder coatings include: polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide series, cellulose series, polyester series, etc.
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