PVDF-coated rolled metal is an innovative material that combines high reliability and durability with aesthetic appeal. More and more manufacturers prefer PVDF coatings due to their unrivaled performance characteristics.
Chemical composition of PVDF coating
PVDF is a thermoplastic fluoropolymer whose core element is polyvinylidene fluoride. Its structure is chemically resistant to most solvents, acids, alkalis, and ultraviolet radiation. In addition to the core fluoropolymer, the polymer coating contains:
- Binding resins – provide adhesion and flexibility of the film.
- Pigments and dyes give the material a variety of shades and protection against fading.
- Additives to improve UV resistance and corrosion protection.
- Transparent protective varnishes provide mechanical strength and surface shine.
This multi-layer coating provides increased resistance to aggressive factors and extends the service life of rolled metal products by 2–3 times compared to traditional polyester coatings.
PVDF coating technology
The coating application process includes several technological operations:
Pre-treatment
- Mechanical cleaning and removal of the oxide layer.
- Chemical depassivation of the surface.
- Phosphate treatment to form an anti-corrosion layer.
Applying primer
The primer layer improves the adhesion of the metal to the fluoropolymer coating.
Drying and fixing the soil
It is carried out in special drying chambers at an optimal temperature.
Application of PVDF film
Uniform spraying or powder coating followed by curing. It's important to control the layer thickness, which is typically 22-25 microns.
Finish coating
A protective varnish is often applied, which improves resistance to mechanical damage.
Quality control
Adhesion, thickness, homogeneity and resistance to climatic conditions are tested.
Application of PVDF coating on rolled metal products
Main areas of application:
- Architecture and construction. Thanks to its high resistance to fading and corrosion, the material is suitable for building cladding, facade panels, facade cassettes, and roofing.
- Industrial structures. PVDF-coated rolled metal is used for ventilation grilles, industrial shelving, and structures operating in aggressive environments.
- Vehicles. Body parts of buses, trailers, and containers are treated with PVDF to protect against corrosion.
- Household appliances and interior design. The coating ensures durability and increased wear resistance.
- Umbrellas and awnings. PVDF provides high resistance to moisture, wind, and UV rays.
PVDF coating is the optimal choice for those seeking a durable, reliable, and aesthetically pleasing material. Advanced application technologies and unique physical and chemical properties have made this polymer coating the standard for modern rolled metal quality.
