• Dual MFR grades for precise coating matching: Two standard grades PD-310 and PD-320 with different melt flow rates, adapting to different film forming requirements from thick functional anti-corrosion coating to ultra-thin precision polyimide film coating.
• High stable 55±5% solid content: High solid content with narrow fluctuation range, ensures consistent coating thickness and uniform film performance, reduces drying energy consumption and effectively improves production efficiency.
• Mild neutral to weak alkaline pH: pH value controlled at 7.0-9.0, no corrosion to metal substrates and production equipment, good compatibility with polyimide film and most coating auxiliary additives.
• Full PFA premium performance inheritance: Cured coating fully retains PFA's outstanding 260℃ long-term high temperature resistance, excellent chemical corrosion resistance, remarkable non-stick property and superior electrical insulation, with better durability than FEP coating.
• Excellent film forming and leveling property: Uniform particle size distribution, good film forming performance after high temperature sintering, forms dense, pinhole-free and smooth fluorine coating with excellent adhesion to various substrates.
• Specialized for polyimide film modification: Specially suitable for surface coating of polyimide film, improves surface smoothness, chemical resistance, weather resistance and electrical insulation of PI film, widely used in high-end electronic insulation film industry.
• Durable high-end non-stick effect: Better high temperature resistance and longer service life than ordinary PTFE and FEP non-stick coatings, maintains stable non-stick performance under long-term high-temperature cooking, ideal for premium cookware products.
• Reliable heavy anti-corrosion protection: The cured film resists almost all strong acids, strong bases, organic solvents and oxidizing media, provides long-term reliable anti-corrosion protection for metal parts and chemical equipment under harsh working conditions.
• Stable emulsion storage stability: Uniform dispersion system with excellent storage stability, not easy to delaminate and precipitate, easy to dilute and construct on site, suitable for various industrial coating processes.
• Strict quality control stable supply: Mature emulsion polymerization process, strict control of solid content, particle size and MFR index, stable batch-to-batch quality, supports long-term stable bulk supply for high-end coating manufacturers.

Perfluoroalkoxy (PFA) dispersion liquid (CAS 26655-00-5) is a high-performance aqueous fluoropolymer emulsion prepared by emulsion polymerization of tetrafluoroethylene and perfluoropropyl perfluorovinyl ether.

It fully retains the excellent comprehensive properties of PFA resin, such as outstanding high and low temperature resistance up to 260℃, excellent chemical corrosion resistance, remarkable non-stick property and superior electrical insulation. With 55±5% stable solid content and two optional MFR grades, it can be applied by spraying, dipping, roller coating and precision film coating processes. After high temperature sintering and film forming, it forms a dense, smooth and durable fluorine coating with better temperature resistance and mechanical properties than FEP coating. It is widely used in polyimide film surface coating, high-end non-stick cookware coating and metal anti-corrosive coating, and is a high-end functional fluorine coating material.

• PFA Aqueous Dispersion
• Perfluoroalkoxy Coating Emulsion
• PFA Fluoropolymer Dispersion
• CAS 26655-00-5
• Perfluoroalkoxy Alkane Aqueous Emulsion
• PFA Coating Resin Dispersion
• Polyimide Film Coating PFA Emulsion
• High Temperature Fluorocoating Dispersion

1. Polyimide Film Surface Coating (Core High-end Application): The most representative high-end application. PFA dispersion is coated on the surface of polyimide film to form a uniform and dense fluorine resin layer, which significantly improves the surface smoothness, chemical resistance, weather resistance and electrical insulation performance of PI film. It is widely used in high-end electronic insulation films, flexible circuit board substrates and other electronic materials, and is an important modification material for high-performance PI films.
2. High-end Non-stick Cookware Coating: Used as top coating or functional layer for high-end non-stick cookware such as frying pans, baking trays and kitchen utensils. Compared with ordinary PTFE and FEP coatings, PFA coating has better high temperature resistance, longer service life and more durable non-stick effect under long-term high-temperature cooking conditions, and meets the requirements of high-end cookware for long-term durability and food contact safety.
3. Metal Anti-corrosive Coating: Applied on the surface of metal fasteners, chemical equipment parts, valves and pipelines as heavy anti-corrosion protective layer. It resists erosion of strong acid, strong alkali, organic solvent and corrosive gas for a long time, provides more reliable protection than ordinary anti-corrosion coatings in harsh corrosive environments, and is suitable for chemical industry, pharmaceutical and high-end industrial anti-corrosion scenarios.
4. Special Fabric & Filter Material Coating: Coated on high-temperature resistant filter bags, special industrial fabrics and high-performance fiber materials. It endows fabrics with excellent water and oil repellency, chemical corrosion resistance and dust release property, improves filtration efficiency and service life of filter materials, and is suitable for high-temperature and corrosive dust removal and filtration scenarios.
5. Other Functional Coatings: Also used for surface coating of special electronic components, high-temperature resistant materials and special industrial parts, providing functions such as high temperature resistance, insulation, anti-sticking and anti-fouling, and can be customized according to different substrate and performance requirements.
   

A1: The core difference lies in MFR and film forming performance. PD-310 with MFR 3.0-5.0 has higher molecular weight, better mechanical strength and toughness of the cured film, which is more suitable for thick anti-corrosion coating and scenes requiring high film strength. PD-320 with MFR 5.1-10.0 has better fluidity and leveling property after melting, and is easier to form a smooth and uniform ultra-thin film, which is more suitable for precision polyimide film coating and thin high-gloss non-stick coating.

A2: PFA aqueous dispersion can be applied by spraying, dipping, roller coating, precision slit coating and other processes. The appropriate construction method can be selected according to the shape of the workpiece, substrate type and coating thickness requirements. Before construction, it can be diluted with deionized water to adjust viscosity according to process requirements, and it needs to be stirred evenly before use.

A3: After coating, it usually needs to be dried at low temperature first to remove moisture fully, then sintered at high temperature of 360-400℃ to form a continuous dense film. The specific drying and sintering temperature and time should be adjusted according to coating thickness, substrate type and production line speed. Sufficient sintering temperature and holding time shall be ensured to obtain a dense, well-bonded and high-performance fluorine coating.

A4: Both are melt-processable fluoropolymer dispersions. The core difference is the performance of cured film: PFA coating has higher long-term service temperature (260℃ vs 200℃ of FEP), better mechanical strength, stress crack resistance and chemical corrosion resistance, and more durable performance under high temperature and harsh environment. FEP dispersion has lower cost and is suitable for general scenarios, while PFA dispersion is used for high-end scenarios with higher temperature resistance and durability requirements.

A5: PFA dispersion should be stored in a tightly sealed original container at 5-35℃. Freezing and long-term exposure to high temperature and direct sunlight should be avoided, otherwise the emulsion will break and delaminate. It should be stirred gently and evenly before use after long-term storage. Do not mix with other incompatible chemicals. The shelf life is 12 months under proper storage conditions.

A6: Food contact grade PFA dispersion complies with relevant food contact material standards, and can be safely used for non-stick coating of food processing equipment and cookware after proper sintering curing. Ordinary industrial grades are mainly used for industrial anti-corrosion and other scenarios. Please confirm the product grade and relevant certification before using in food contact scenarios.