4 Top Applications of PVDF Sheet and A Comparison to Powder Coating
Are you wondering about PVDF sheet‘ advantages and disadvantages, as well as how they compare to other aluminium finishing options? Perhaps you’d want additional information on how they’re applied, or perhaps you’d like to compare them to powder coating.
PVDF coatings are discussed in this article, and they’re worth thinking about for a variety of reasons, including their capacity to manufacture aluminium goods that are both visually appealing and long-lasting. They are more resistant to weathering than other options, even when exposed to extreme circumstances such as seawater spray. We’ll begin by defining PVDF coatings, and then discuss their application procedure, advantages, and differences from powder coats.
What is PVDF Sheet?
PVDF (Polyvinylidene Fluoride) coatings are one of the most widely utilised commercial and industrial coatings. PVDF sheet is a fluoropolymer resin that is very inert and stable, allowing it to withstand metal corrosion for long periods of time.
PVDF coatings are a kind of resin-based coating. They’re commonly employed on project exteriors when a long-lasting coating is required to protect the substrate from weathering, chalking, fading, and UV radiation. Valspar’s 70 per cent PVDF sheet provides a beautiful look as well as exceptional protection. PVDF coatings can be applied to the metal before or after it has been formed. Coatings are applied to form aluminium extrusions on curtain walls, aluminium window and door framing, gutters, soffits, and sunshades in the factory in coil coating applications for metal roofs, garage doors, and wall panels, or spray applied to form aluminium extrusions on gutters, soffits, and sunshades.
PVDF (polyvinylidene fluoride) coatings are a resin-based, factory-applied coating system with integrated colour pigment particles that support a wide spectrum of matte-finish colours. Because of their exceptional resistance to degradation by sunshine, moisture, and temperature, they are most typically utilised for architectural coating applications.
PVDF coatings belong to the fluorocarbon family of polymers, which create chemically and thermally stable bonding. This enables some PVDF coating variations to continually meet or exceed severe criteria over lengthy periods of time with negligible fading. You might be interested in learning more about how these coatings are applied.
The PVDF Application Process
PVDF coatings for aluminium are applied with a liquid spray coating gun in a painting studio. The steps below detail the whole process of applying a high-quality PVDF sheet:
- Surface Preparation – Proper surface preparation is required for any high-quality coating. Cleaning, degreasing, and deoxidizing (removing rust) of the aluminium surface is required for good PVDF coating adherence. The application of a chrome-based conversion coating before the primer is required for superior PVDF coatings.
- Primer – The primer effectively stabilises and protects the metal surface while also enhancing top coating adherence.
- PVDF Top Coating – Color pigment particles are added to the top coating as it is applied. The top coating protects the coating from damage caused by sunshine and water, as well as increases its abrasion resistance. After this procedure, the coating must be cured. In the PVDF coating technology, the top coating is the thickest layer.
- PVDF Clear Coating – The clear coating is the final layer in the 3-layer PVDF coating process, and it provides extra protection from the environment while allowing the colour of the topcoat to show through without being damaged. This layer of coating must also be cured.
Key Benefits of Using PVDF Coatings
- Dip coatings, which include volatile organic chemicals, are less ecologically friendly (VOCs)
- Corrosion and chalking resistance
- Wear an abrasion-resistant
- Keeps a high level of colour uniformity (resists fading)
- Chemical and pollutant resistance is high.
- Long-lasting and low-maintenance
Comparing PVDF and Powder Coatings
Spray coating is a critical step in the production of aluminium wall panels (aluminium cladding). Electrostatic spraying is done with electrostatic spray guns. Electrostatic spraying may be separated into two types: electrostatic liquid spray coating (also known as PVDF sheet) and electrostatic powder coating (powder coating). In general, spraying procedures change according to distinct spraying objects and unique effects. Each one has its own distinct traits.
PVDF (Polyvinylidene Fluoride) and powder coatings for aluminium in curtain wall cladding are widely utilised in the building sector. However, the following are the key distinctions between Powder Coating and PVDF Coatings:
- PVDF coating is a liquid coating method based on resin. Powder coating is an electrostatic procedure that involves spraying electrostatically charged powder onto a metal surface.
- PVDF coating has high efficiency and is used in places that are exposed to the elements, such as metal frameworks in building facades, where the colour and shine must be maintained for a long time.
PVDF Coatings are commonly utilised in curtain walls and skylight frames. When exposed to the elements, however, Powder Coating is prone to external wear and tear. The Powder coating cracks due to humidity, heat, and oxidation.
- PVDF coatings are more costly than powder coatings, but they have a longer lifespan than powder coatings.
PVDF Coatings are less durable than powder coatings.
- Powder coatings come in a range of colours, textures, and finishes to suit your needs. PVDF coatings are only available in a matte finish; to get a super gloss, more layers of coating must be applied, increasing the material and application costs.
- Powder coatings employ electrostatically applied powders, whereas modulated fluid paints use modulated fluid paints.
- Aren’t as thick as powder coatings.
- While liquid coatings may be cured at room temperature, powder coatings must be baked.
- They Are UV-resistant, however, powder coatings will fade over time if exposed to sunshine.
Powder coatings are available in a wide range of colours and finishes, whereas liquid coatings are limited to a matte appearance.
- Are more expensive than powder coatings, which are less expensive and can save money by reusing powder that has been over-sprayed.
Before spraying, the same procedure was used. The process’s pre-treatment consists mostly of anti-oxidation and chromate treatments, which attempt to remove oil, dust, and rust from the aluminium plate’s surface. The treatments not only prevent corrosion but also improve the paint film’s adherence.
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Engineering plastic components are a frequent industrial option due to their numerous advantages. Engineering plastics are frequently a practical choice for plastic components such as tamper-proof packaging to ensure secure transport, as well as thorough design quality checks and other critical elements. Buy a high-quality PVDF sheet today from our website!