Are you interested in learning more about PVDF Sheet coatings' advantages and disadvantages relative to other aluminium finishing options? You may want to know how they apply, or you may want to know how they stack up against powder coating.
In this article, we'll talk about PVDF coatings, which are worth taking into account for various reasons, including their capacity to make both aesthetically pleasing and durable aluminium products. They are more resilient than other options, even in extreme situations like exposure to saltwater spray.
How do PVDF Coatings work?
Many matte-finish colours are supported by polyvinylidene fluoride
(PVDF) coatings, which are factory-applied, resin-based coating systems. As a
result of their superior resistance to weathering by sunlight, moisture, or
temperature, they are most frequently used for architectural coating
applications. The curtain wall, roofing sheet, and aluminium wall cladding are typical
uses for PVDF coatings.
Application procedures for PVDF
PVDF coatings for aluminium are applied using a liquid spray coating gun
in a painting booth. The complete procedure for creating a premium PVDF coating
is outlined in the steps that follow:
Surface Preparation: Good surface preparation is necessary for any high-quality coating. Cleaning, degreasing, and deoxidizing (removing rust) the aluminium surface is necessary for good PVDF coating adhesion. A chrome-based conversion coating before the primer is necessary for superior PVDF coatings.
Primer: The primer effectively protects, stabilizes, and enhances the
adhesion of the top coating to the metal surface.
PVDF Top Coating: Color pigment particles are included when the
top coating is applied. The top coating increases the coating's abrasion
resistance and resistance to fading from sunlight and water damage. This step
must be followed by curing the coating. The PVDF coating system's top coating
is its thickest layer.
PVDF Clear Coating: The final layer of the three-layer PVDF
coating process is the clear coating, which offers additional environmental
protection while letting the colour of the topcoat show through without
endangering it. It's also necessary to cure this coating layer.
Principal Advantages of PVDF Coatings
- Superior to dip coatings,
which contain volatile organic compounds, in terms of environmental
friendliness (VOCs)
- Tolerant of sunlight
- Anti-corrosion and
anti-chalking
- Resistant to abrasion and
wear
- Keeps a high level of colour
consistency (resists fading)
- High resistance to
pollutants and chemicals
- Lasting and requiring little
upkeep
PVDF and Powder Coatings Comparison
PVDF coatings and powder coatings primarily differ in that PVDF
coatings:
- Utilize a modulated fluid
paint, whereas electrostatically applied powders are used in powder
coatings.
- They are more delicate than
powder coatings
- and can cure at room
temperature, unlike powder coatings that need to be baked.
- Are UV radiation-resistant,
whereas if exposed to sunlight, powder coatings will deteriorate over
time.
- It can only be matte,
whereas powder coatings are available in various colours and finishes.
- They are more expensive than
powder coatings, which are less expensive and can reduce costs further by
reusing excess powder.
The Benefits of PVDF Sheets
This sheet is frequently used in applications where it is necessary to have high purity, strength, and resistance to heat, solvents, and slow smoke generation. It is distinguished from fluoropolymers by its low density and low price.
Additionally, these sheets are offered in various piping products due to their affordability and ease of melting compared to other options.
The best supplier of PVDF fittings, Petron Thermoplast, produces high-quality sheets with excellent chemical resistance, good electrical properties, and the ability to withstand high temperatures. Our devoted customers can purchase PVDF sheets and pipes from us at the most affordable prices.
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