Everflon™ supplies a range of general-purpose and high-purity PFA resins (PFA 403, 410, 420, 430) with precisely controlled melt-flow characteristics. A clear understanding of the rheological behavior and mechanical-strength differences among the grades can shorten the material-selection process and reduce risks during mass-production setup.
What Is MFR (Melt Flow Rate)?
MFR is a standard measure (g/10 min) of how readily a molten thermoplastic fluoropolymer flows under specified temperature and load test conditions.
In actual fluoropolymer processing, melt flow directly influences high-speed extrusion drawability and the filling behavior of injection-mold cavities:
Key Polymer Rheology Principle
A higher MFR does not necessarily mean that the overall mechanical performance is "better." It indicates differences in molecular-weight distribution and flow characteristics:
Lower MFR generally provides higher molecular weight, resulting in excellent mechanical toughness, MIT Flex Life, and environmental stress-crack resistance (ESCR).
Higher MFR lowers melt viscosity, making it advantageous for thin-wall filling, replication of intricate geometries, and high-speed continuous extrusion.
The optimum grade is determined by the molding equipment, processing method, and part thickness and geometry.
Everflon™ PFA Product Portfolio in Detail
Review the unique characteristics, typical applications, and selection considerations for each PFA grade:
Low MFR
Everflon™ PFA 403
A general-purpose, low-flow PFA resin designed for excellent mechanical toughness and environmental stress-crack resistance (ESCR), optimized for extreme chemical environments and thick-wall molding/extrusion.
Typical Applications:
High-performance PFA tubes and thick-wall piping hoses
Corrosion-resistant pipe linings
Industrial extrusion films and sheets
Thick-wall injection-molded components
Blow-molded containers
Recommended When:
High mechanical toughness and impact resistance are essential
Environmental stress-crack resistance (ESCR) is highly important
Manufacturing thick tubes or corrosion-protection linings
Long-term contact with hot corrosive chemicals is expected
Mid-Range MFR
Everflon™ PFA 410
A versatile grade offering standard medium flowability and a balanced combination of processing flow and the mechanical properties of the finished product.
Typical Applications:
Thin-wall wire and specialty cable insulation jacketing
Precision injection/compression-molded components
Small- and medium-sized precision fluoropolymer components
Recommended When:
Thin-wall extrusion coating processes are required
Small precision-molded components are being produced
A balance between flowability and mechanical properties is required
Processing flexibility and a wide operating margin are needed
High MFR
Everflon™ PFA 420
A high-flow grade that improves production-line speed through excellent flowability and facilitates filling of multi-cavity molds and complex flow paths.
Typical Applications:
High-speed extrusion-molded tubes
Telecommunications and high-temperature wire/cable jacketing
Multi-cavity injection-molded products
Recommended When:
High flowability is needed to shorten molding cycle time
Continuous high-speed extrusion of small-diameter tubes is required
Continuous wire-jacketing lines must operate at high speed
Lower injection pressure is required during injection molding
Ultra-High MFR
Everflon™ PFA 430
A specialty grade with ultra-high melt flow characteristics, delivering excellent performance in micro injection molding, ultra-thin wire jacketing, and filling molds with fine flow paths.
Typical Applications:
Ultra-thin insulation coating for fine-gauge wires
Micro injection molding and ultra-precision components
Small fittings and connector components with complex geometries
Recommended When:
Maximum melt flowability is essential
Sub-millimeter ultra-thin sections must be filled
Improved replication of fine mold patterns is required
Mold back pressure must be significantly reduced
PFA Grade Comparison Table
Specification summary matrix based on the Everflon™ official product guide:
| Product | MFR Classification | Typical Processing Methods | Typical Applications |
|---|---|---|---|
| Everflon™ PFA 403 | Low MFR | Extrusion / Compression Molding / Transfer / Blow Molding | Industrial tubes, corrosion-protection linings, films, thick-wall molded components |
| Everflon™ PFA 410 | Mid-Range MFR | Extrusion Molding / Injection Molding | Thin-wall wire jacketing, precision injection-molded components, chemical-resistant fittings |
| Everflon™ PFA 420 | High MFR | High-Speed Extrusion Molding / Injection Molding | Tubes, high-speed cable jacketing, multi-cavity injection-molded products |
| Everflon™ PFA 430 | Ultra-High MFR | Precision Injection Molding / Micro-Extrusion | Ultra-fine wire jacketing, micro-molded products, complex precision connectors |
5 Key Questions to Consider When Selecting a Material
Before finalizing a resin grade, we recommend reviewing the following five items in order:
01
What product are you manufacturing?
• Tubes / High-pressure hoses
• Wires and specialty cables
• Valve linings / Fittings
• Customized precision-molded products
02
What processing method are you using?
• Continuous screw extrusion
• High-pressure injection molding
• Blow / Compression molding
• Transfer molding
03
What are the part thickness and geometry?
• Ultra-thin structural sections
• Thick cross-sectional structures
• Complex flow paths / High-aspect-ratio components
• Micro-precision fine structures
04
What production speed and target volume are required?
• High-volume, high-speed automated lines
• High-speed draw-down extrusion lines
• Prototyping and small-volume production
• Simultaneous filling of multiple cavities
05
What operating environment will it be used in?
• Continuous high- or ultra-low-temperature service
• Exposure to strong acids, strong bases, or organic solvents
• Repeated flex fatigue and vibration
• Risk of gas permeation under high pressure
