FEP 4601
Everflon™ Extreme Molecular Weight Fluoropolymers
FEP 4601
The ultimate ceiling of stress-crack resistance and flexural durability.
Engineered for ultra-pure semiconductor fluid distribution, chemical bellows, heavy corrosion linings, and severe-duty conduits.
2.0 g/10 min
Melt Flow Index Benchmark (ASTM D2116)
> 100 kV/mm
Dielectric Strength (0.25 mm)
2.03
Relative Permittivity @ 1 GHz
205°C / 400°F
Continuous Service Temp.
Maximum Molecular Toughness
Unsurpassed flexural fatigue immunity and environmental stress-crack defense.
Ultra-Low MFI 2.0
Maximum Melt Strength & Molecular Chain Integrity
Superior Melt Viscosity: Formulated with extreme molecular weight parameters (MFI 1.5–2.5 g/10min), FEP 4601 delivers exceptional melt strength for thick-walled extrusion, demanding compression molding, and zero-sagging structural shapes.
Maximum ESCR & Flex Life
Ultimate Resistance to Environmental Stress Cracking
Absolute Crack Immunity: Sets the benchmark for ESCR and MIT flex fatigue endurance. Resists stress crazing and micro-fracturing under aggressive chemical attack, constant mechanical vibration, and extreme thermal cycling.
Pure Dielectric Shield
Lossless High-Voltage & High-Frequency Performance
Ultra-Low Permittivity (2.03 @ 1 GHz): Provides uncompromised electrical isolation for high-voltage industrial leads and precision sensors, backed by a dielectric breakdown strength greater than >100 kV/mm.
Absolute Chemical Defense
UL 94 V-0 Safety & Zero Ionic Contamination
UHP-Grade Cleanliness: Features low extractables and zero ionic leaching for sensitive wet-bench chemistry. Defies aggressive boiling acids, fuming oxidizers, and harsh solvents up to 205 °C (400 °F) with top-tier UL 94 V-0 ratings.
Mission-Critical Applications
Engineered for semiconductor wet benches, high-purity valves, and dynamic bellows.
APPLICATION 01
Semiconductor UHP Chemical Tubing & Fittings
Premium resin for ultra-pure fluid handling systems, wet bench chemical distribution loops, valve bodies, and high-purity fittings requiring maximum resistance to chemical stress cracking.
APPLICATION 02
High-Cycle Chemical Bellows & Expansion Joints
Extrusion and compression molding of heavy-duty flexible bellows, metering pump diaphragms, and thermal expansion joints enduring rigorous mechanical and thermal fatigue cycles.
APPLICATION 03
Corrosion Linings & Heavy Industrial Conduits
Thick-wall anti-corrosion pipe linings, vessel sheets, and severe-duty protective conduits designed to withstand aggressive mineral acids and organic solvents under continuous operation.
Datasheet & Material Properties
Technical Specifications at a Glance
| Property | Test Method | Typical Value | Engineering Assessment & Notes |
|---|---|---|---|
| Melt Flow Index (MFI) | ASTM D2116 | 1.5 – 2.5 g/10 min | Extreme molecular weight for absolute stress-crack resistance |
| Specific Gravity | ASTM D792 | 2.15 | Dense, ultra-high purity fluoropolymer matrix |
| Tensile Strength | ASTM D638 | 27 MPa | Peak tensile endurance & heavy mechanical pull strength |
| Elongation at Break | ASTM D638 | 360 % | Highest flexural ductility and extreme elongation retention |
| Izod Impact Strength (23 °C) | ASTM D256 | No Break | Uncompromised toughness from cryogenic to elevated thermal extremes |
| Dielectric Strength (0.25 mm) | IEC 243 / ASTM D149 | > 100 kV/mm | High-voltage insulation armor and electrical surge protection |
| Relative Permittivity (1 GHz) | IEC 250 / ASTM D150 | 2.03 | Low dielectric constant & lossless high-frequency signal propagation |
| Limiting Oxygen Index (LOI) | ISO 4589 / ASTM D2863 | > 95 % | UL 94 V-0 top-tier fire safety rating |
| Continuous Service Temp. | --- | 205 °C / 400 °F | Engineered for continuous thermal and environmental extremes |
Pellet Purity & Quality
Supplied in consistent 3 mm (0.12 in) dust-free translucent pellets ensuring uniform extruder feed rate and stable melt barrel pressure.
Processing Equipment
Compatible with standard heavy-duty melt extrusion, compression molding, and transfer molding. Corrosion-resistant nickel alloys (Hastelloy, Inconel) recommended (360°C–400°C).
Packaging Standards
Delivered in heavy-duty 25-kg (55.1-lb) drums sealed with double-layer moisture-proof polyethylene liners to safeguard semiconductor cleanroom purity.
Quality Standards & Environmental Stewardship
Certified Quality. Uncompromising Environmental Standards.
✓ Flame & Fire Safety
UL 94 V-0 Certified
Everflon™ FEP 4601 achieves the highest UL 94 V-0 flammability classification with an LOI over 95%. It fully complies with strict U.S. National Electrical Code (NEC) plenum fire standards and aerospace flame propagation requirements.
✓ Global Chemical Compliance
RoHS 3 & REACH SVHC
Manufactured without restricted hazardous chemicals. Fully compliant with EU RoHS Directive 2011/65/EU (and 2015/863) and certified free of REACH Substances of Very High Concern (SVHC) for seamless international export.
✓ High Purity & PFOA Free
FDA 21 CFR & Zero-PFOS/PFOA
Synthesized via clean polymer technology containing zero non-compliant PFOA/PFOS surfactants. Meets FDA 21 CFR 177.1550 criteria for chemical tubing, food processing, and semiconductor fluid handling systems.
Everything you need. Atom by atom.
Complete catalog and specs. Download now.
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