What Is the Difference for PVDF Coating and Powder Coating?

There are customers donot know what the difference between PVDF coating and powder coating, and do not know they shall choose PVDF coating or powder coating. Here we are pleased to make a quick and simple introduction for what is PVDF coating, what is powder coating, the difference and advantage of PVDF coating and powder coating.

What’s PVDF coating?

PVDF coating (polyvinylidene fluoride) a resin based liquid coating charged powder is sprayed on the metal surface.

PVDF coating (polyvinylidene fluoride) a resin based liquid coating system and a pure thermoplastic fluoropolymer that is non-reactive and possesses multiple coating benefits. PVDF coatings are especially resistant to solvents, acids and have a very low density compared to similar fluoropolymers.

What’s Powder coating?

Powder Coating is an electrostatic process in which the electrostatically charged powder is sprayed on the metal surface.

Powder coating is Electrostatic spraying refers to a coating method that uses corona discharge principle to make atomized coating negatively charged under the action of high voltage direct current field and adsorbed on the surface of positively charged substrate.

Difference and performance comparison

1. Different raw material

   PVDF coating raw material is Polyvinylidene fluoride
   Powder coating raw material is various such as Epoxy resin, Epoxy-polyester mixture, Polyester resin, Polyurethane resin, Polyvinyl chloride (PVC), polyethylene.

2. Different process

   Fluorocarbon spraying process is divided into

   • Two coating a baking (referred to as two coating) : primer + finish + curing.
   • Three coating a baking (referred to as three coating), primer + finish + finish + curing.
   • Four coating two baking (referred to as four coating), primer + isolation blocking paint + curing + finish + varnish + curing

   Powder Coating Process Involves Three Basic Steps

   Part preparation or the pre-treatment, the powder application, and curing.

3. The performance comparison

   Performance PVDF coating Powder coating Film thickness 35-60μm 60-120μm Wear resistance Excellence Good Weather resistance Over 15 years, the color is basically unchanged 7-8 years, general 2-5 years can produce obvious chromatic aberration Corrosion resistance/stain resistance Fluoropolymers are corrosion resistant and have a smooth surface Rough surface, easy to stain, outdoor weather resistance is general Appearance Plain color, metal color, wrinkle, sand and other artistic coatings. Can do light, matte, matt and so on. Plain color, limited metal color. Can do light, matte, matt and so on. Color uniformity Good color consistency Small color difference Cleanliness and maintenance Dirt is not easy to adhere to, easy to clean and maintain Need regular maintenance the price Expensive Economical