FEP 4603
Everflon™ Ultra-High Molecular Weight Fluoropolymers
FEP 4603
The golden rheology curve for peak fatigue endurance and crack immunity.
Engineered for high-purity semiconductor tubing, chemical pump bellows, heavy linings, and mission-critical wire jackets.
3.0 g/10 min
Golden Melt Flow Index (ASTM D2116)
> 100 kV/mm
Dielectric Strength (0.25 mm)
2.03
Relative Permittivity @ 1 GHz
205°C / 400°F
Continuous Service Temp.
Peak Toughness & Rheological Precision
Unrivaled flex-life combined with flawless extrusion stability.
Golden 3.0 MFI Balance
Optimal Throughput & Melt Viscosity
Bridging High Output and Crack Resistance: Positioned at the 3.0 g/10min golden rheology curve, FEP 4603 achieves higher extrusion line speeds than ultra-low MFI grades while preserving the massive molecular weight needed for complete resistance to stress cracking.
Extreme Dynamic Fatigue
Benchmark MIT Flex Life & Dynamic Bellows Durability
Sub-Zero Impact & Fatigue Life: Engineered for continuous high-frequency dynamic flexing and severe thermal cycling (-196°C to +205°C). Prevents pinholing and structural breakdown in chemical metering bellows, expansion joints, and dynamic flexible conduits.
Signal & Voltage Armor
Lossless High-Frequency & High-Voltage Barrier
Pure Dielectric Constant (2.03 @ 1 GHz): Minimal dissipation factor (tan δ < 0.0003) for zero-loss RF propagation in aerospace telemetry and high-voltage transmission leads, reinforced by a dielectric breakdown strength exceeding >100 kV/mm.
Total Chemical Immunity
UL 94 V-0 Flammability & Zero Ionic Leaching
Ultra-Pure Polymer Matrix: Water absorption < 0.01% with zero extractable ionic contaminants. Defies aggressive boiling acids, fuming nitric acid, strong alkalis, and ozone up to 205 °C (400 °F) with top-tier UL 94 V-0 flame rating (LOI > 95%).
Mission-Critical Industries
Built for semiconductor wet benches, dynamic bellows, and extreme cabling.
APPLICATION 01
Semiconductor Ultra-Pure Tubing & Valve Linings
Premium resin for ultra-pure chemical distribution loops, high-purity wet bench manifolds, diaphragm valves, and acid/solvent transfer conduits demanding near-zero trace metal elution.
APPLICATION 02
Dynamic Chemical Bellows & Heavy Expansion Joints
Extrusion and compression molding of high-cycle flexible bellows, metering pump diaphragms, expansion compensators, and thick-wall corrosion linings enduring cyclic thermal shock.
APPLICATION 03
Severe-Duty Control Cables & High-Flex Harnesses
Rugged outer jacketing and primary insulation for robotic drag-chain cables, downhole oil exploration harnesses, nuclear instrumentation lines, and military vehicle control wiring.
Datasheet & Material Properties
Technical Specifications at a Glance
| Property | Test Method | Typical Value | Engineering Assessment & Notes |
|---|---|---|---|
| Melt Flow Index (MFI) | ASTM D2116 | 3.0 g/10 min | Optimal high molecular weight for maximum fatigue & flex life |
| Specific Gravity | ASTM D792 | 2.15 | Dense, ultra-high purity fluoropolymer matrix |
| Tensile Strength | ASTM D638 | 26 MPa | Peak tensile endurance & heavy mechanical pull strength |
| Elongation at Break | ASTM D638 | 350 % | Highest flexural ductility and extreme elongation retention |
| Izod Impact Strength (23 °C) | ASTM D256 | No Break | Uncompromised toughness from cryogenic (-196°C) to 205°C |
| 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 melt extrusion, tubing extrusion, compression, and transfer molding. Corrosion-resistant nickel alloys (Hastelloy, Inconel) recommended (350°C–390°C).
Packaging Standards
Delivered in heavy-duty 25-kg (55.1-lb) drums sealed with double-layer moisture-proof polyethylene liners to safeguard cleanroom purity.
Quality Standards & Environmental Stewardship
Certified Quality. Uncompromising Environmental Standards.
✓ Flame & Fire Safety
UL 94 V-0 Certified
Everflon™ FEP 4603 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.
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