Poly coating 18μm VS. Fluoropolymer coating 25μm

Coating Properties:

Polyester coatings:

Polyesters are polymers obtained by polycondensation of polyols and polyacids.18 micron thick polyester coatings used for roll coating of coloured aluminium contain ester bonds in the molecular chain. This coating has a good balance between flexibility and hardness. It provides good decorative properties and gives the surface of the coloured aluminium a glossy appearance. At the same time, polyester coatings have relatively good chemical resistance and can resist the erosion of some common chemicals, such as weak acids and alkalis. However, compared with PVDF, its long-term weathering resistance is slightly inferior.

PVDF coatings (fluoropolymer ):

PVDF is a fluoropolymer with fluorine atoms in its molecular chain. the presence of fluorine atoms in 25 micron thick PVDF coatings used for roll coating of coloured aluminium gives PVDF coatings a very high chemical stability. It is highly resistant to acids, alkalis, salts and organic solvents. Furthermore, PVDF coatings have excellent weather resistance and can be exposed to outdoor environments for long periods of time without fading or chalking, because the fluorine atoms effectively protect the molecular chains from ultraviolet rays and harsh weather conditions.

 

Polyester coating service life and application range

Service Life

In General Environment: Under normal indoor conditions with low humidity and little exposure to sunlight and corrosive substances, polyester coatings can usually last for 10 to 15 years. For example, in an ordinary office or home environment where the temperature and humidity are relatively stable, and there is no direct sunlight for a long time, the coating can maintain good gloss and integrity within this time range.

In Harsh Environment: In outdoor environments with high humidity, strong sunlight, and frequent exposure to rain and snow, the service life of polyester coatings may be reduced to 5 to 8 years. In industrial areas with high levels of pollution and corrosive gases, the service life may be even shorter, usually 3 to 5 years, as the corrosive substances in the air can accelerate the degradation of the coating.

Application Range

Building Industry

Exterior Wall Decoration: Polyester coatings are widely used on building exterior walls. They can provide rich colors and textures, enhancing the aesthetic appeal of buildings. They also have good weather resistance, which can protect the walls from the erosion of wind, rain, and sunlight.

Interior Wall Decoration: On interior walls, polyester coatings can create a smooth and clean surface, which is easy to clean and maintain. They can also be used to achieve different decorative effects, such as matte, glossy, or textured finishes.

Furniture Manufacturing

Wooden Furniture:

Polyester coatings are often used on the surface of wooden furniture. They can highlight the texture of the wood, while also providing protection against scratches, stains, and moisture, prolonging the service life of the furniture.

Metal Furniture:

For metal furniture, polyester coatings can prevent rust and corrosion, and at the same time, give the furniture a beautiful appearance with various colors and finishes.

Automobile Industry

Automobile Body:

Polyester coatings are used on automobile bodies to provide a decorative and protective layer. They have good gloss and color fastness, and can resist scratches and small impacts during daily use.

Automobile Interior:

In the automobile interior, polyester coatings can be applied to parts such as the dashboard and door panels to improve their appearance and wear resistance.

Electrical Appliance Industry

Refrigerators and Washing Machines:

The surfaces of refrigerators, washing machines and other large electrical appliances are often coated with polyester coatings. They can not only make the appliances look more beautiful, but also be resistant to fingerprints, stains and corrosion, which is convenient for daily cleaning and maintenance.

Small Electrical Appliances:

For small electrical appliances such as hair dryers and electric kettles, polyester coatings can also play a role in decoration and protection, improving the overall quality and appearance of the products.

Fluoropolymer coating service life and application range

 Service Life

In General Circumstances: In normal indoor environments with stable temperatures and little exposure to corrosive substances, fluoropolymer coatings can typically last for 15 to 20 years. They maintain good stability and surface properties, showing little sign of fading, cracking, or peeling.

In Harsh Environments: When exposed to harsh outdoor conditions such as strong ultraviolet radiation, high humidity, and salt-laden air, fluoropolymer coatings can still retain their performance for 10 to 15 years. In highly corrosive industrial environments with strong acids, alkalis, or solvents, they can often last for 8 to 12 years, depending on Application Range.

Aerospace Industry

Aircraft Exteriors:

Fluoropolymer coatings are used on aircraft fuselages to provide excellent resistance to ultraviolet radiation, extreme temperatures, and high-altitude environmental corrosion. They help reduce drag and improve fuel efficiency.

Engine Components:

In aircraft engines, these coatings are applied to components to enhance heat resistance and prevent corrosion and fouling, thereby improving the reliability and service life of the engine.

Marine Industry

Ship Hulls:

Fluoropolymer coatings are applied to ship hulls to resist the corrosion of seawater, fouling by marine organisms, and the erosion of waves. They can significantly extend the maintenance cycle of ships.

Offshore Platforms:

For offshore platforms, these coatings protect steel structures from the harsh marine environment, including high salt content, humidity, and strong winds, ensuring the safety and durability of the platforms.

Construction Industry

Building Facades:

They are used on the exterior walls of buildings to provide long-term protection against weathering, ultraviolet radiation, and pollution. Fluoropolymer coatings can maintain the original color and luster of the building for a long time and have good self-cleaning properties.

Roofing Materials: Applied to roofing materials, they can resist rain, snow, and ultraviolet radiation, improving the waterproofing and durability of roofs.

Chemical Industry

Chemical Reactors:

Fluoropolymer coatings are used to line chemical reactors to prevent the corrosion of the reactor walls by corrosive media such as strong acids and alkalis, ensuring the safe operation of the reactors.

Piping Systems:

In chemical piping systems, these coatings can resist the erosion of various chemical fluids, reduce friction, and improve the fluid transmission efficiency.

Electronics Industry

Semiconductor Manufacturing Equipment:

Fluoropolymer coatings are used on the surfaces of semiconductor manufacturing equipment to prevent contamination and corrosion, ensuring the accuracy and stability of the equipment.

Electronic Components:

They are also applied to electronic components to improve their insulation performance, moisture resistance, and chemical stability.

Scratch Resistance Polyester coating VS. Fluoropolymer coating

Comparison Aspect	Polyester Coating	Fluoropolymer Coating
Basic Scratch Resistance	Moderate. Resists light daily - use scratches.	High. Withstands strong scratching forces
Resistance Mechanism	Hard resin film; few anti - scratch additives.	Low - surface - energy fluoropolymers, often with anti - scratch additives
Performance in Humid Environments	Degrades over time.	Remains stable
Performance in High - Temp Environments	Softens, becomes more scratch - prone.	Maintains resistance
Long - term Scratch Resistance	Gradually decreases, cracks may form.	Remains high over time

Costs and Applications

Polyester Coatings:

Polyester coatings are relatively inexpensive to produce, making roll-coated coloured aluminium products containing polyester coatings more affordable. It is suitable for some indoor and outdoor decorative fields that do not require particularly high weather resistance, such as indoor decorative strips, and some building facade decorations that are not exposed to harsh outdoor environments for a long time.

PVDF coating:

The production cost of PVDF coatings is high due to its excellent performance and the high cost of fluorine-containing raw materials. Accordingly, roll-coated coloured aluminium products with 25-micron PVDF coatings are more expensive. However, it is mainly used in the exterior decoration of coloured aluminium materials for high-end building facades, large industrial facilities and other outdoor long-term exposure occasions, such as airport terminals, sports stadiums and other buildings, which require high weather resistance, chemical stability and appearance retention.

When the decision between PE and PVDF coatings leaves you in a state of hesitation, remember that you're not alone. Our team of experts is just a call or an email away. We understand the nuances of these coatings, from their performance characteristics to their long - term cost - effectiveness. By reaching out to us, you're taking the first step towards making an informed decision. Whether it's for a small DIY project or a large - scale industrial application, we are committed to guiding you through the selection process, saving you time, money, and potential headaches. Don't let indecision hold you back. Contact us today and let's embark on this journey to find the perfect coating solution for your needs.