FEP Properties
Applications
- Heat Shrink Tubing & Non-Shrink Tubing
- Heat Exchangers
- Medical Tubing
- Telephone Primary wire-Coating Insulation
- Conventional Wire-Coating insulation
- Jacketing for Telephone and Conventional Primary Wires
- Release Film
- Valve & Chemical Equipment Lining
- Cable (CAT V)
- Foamed Coaxial Cable
- Foamed Plenum Wires
- Computer Interconnects
- Fiber-optic Applications
- Underground Sampling Water Lines
- Coatings
- Textile Dry Cans
- Chemical Processing Equipment
- Heat Sealing Equipment
- Mold Release
Properties:
Electrical FEP exhibits most of the properties of PTFE. However, because of its excellent electrical FEP properties, FEP tubing is a valuable and versatile electrical insulator.
Chemical FEP tubing is inert to most chemicals and solvents, similar to PTFE
Weathering FEP tubing products are virtually unaffected by weather elements. Its resistance to extreme heat, cold, and UV radiation further suits FEP properties for electronic applications.
Insulation FEP Properties and Fire Protection
| Fuels | Heat Contributed (MJ/kg) | Heat Contributed (BTU/lb) |
| Fuel Oil | 41.9 | 18,000 |
| Coal | 23.3-32.6 | 10,000-14,000 |
| Wood | 18.6-23.3 | 8,000-10,000 |
| Insulation Materials | Heat Contributed (MJ/kg) | Heat Contributed (BTU/lb) |
| Polyethylene | 46.5 | 20,000 |
| PVC | 20.9-30.2 | 9,000-13,000 |
| Rubber | 23.3-32.6 | 10,000-14,000 |
| FEP | 5.1 | 2,200 |
Chemical Reasoning for FEP Properties
| Reduced Chain Length |  | Improved Flow (Retained Toughness) |
| Increased Chain Entanglement | | Improved Creep Resistance |
FEP - Fluorinated ethylene propylene - TYPICAL PROPERTIES
| Property | Value | Units | Method |
| MECHANICAL PROPERTIES | |||
| Tensile Strength, 73°F | 2100-3050 14.5 to 21 | psi MPa | |
| Elongation, 73°F | 240 - 300 | % | |
| Flexural Strength, 73°F | No break at flexure | D 790 | |
| Impact Strength, Izod | No break | ||
| Yield Strength At 23 deg C | 1740 12 | psi MPa | |
| Density (as polymerized) | 2.12 to 2.17 | gm/cu.cm | |
| THERMAL PROPERTIES | |||
| Coefficient of Linear Expansion 20 to 100 deg C | 12 x 10-5 | K-1 | D 696 |
| Melting Point | 487 - 540 253 - 282 | deg F deg C | |
| Thermal Conductivity | 1.45 0.209 | Btu·in/h·ft2·°F W/m·K | |
| Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa) | 158 to 171 70 - 77 | deg F deg C | D 648 |
| Service Temperature | -418 to 403 -250 to 206 | deg F deg C | |
| Processing Temperature | 698 - 743 370 - 395 | deg F deg C | |
| ELECTRICAL PROPERTIES | |||
| Dielectric Strength, short time, 0.080” | MV m-1 | ||
| Surface Arc-Resistance | >300 (does not track) | sec | D 495 |
| Volume Resistivity, dry, @ 50% RH | >1018 | ohm-cm | D 257 |
| Surface Resistivity, @ 100% RH | 1016 | Ohm/sq | D 257 |
| Dielectric Constant, 60 to 2 x 109 cps | 2.1 | ε | D150-81 |
| Dielectric Strength | 13-100 | kV mm-1 | D149 |
| Dissipation Factor @ 60 Hz - 1 MHz | <0.0001 | D150-81 | |
| OTHER PROPERTIES | |||
| Refractive Index | 1.344 | nD 25 | D 542 |
| Water Absorption | <0.1 | % | D570-81 |
| Flame Rating+ | VE-0 | UL-94 | |
| Limiting Oxygen Index | 95 | % Oxygen | D 2863 |
| Resistance to Weathering | Excellent | ||
| Specific Gravity | 2.1-2.3 | D792-66 (1979) | |
| Coefficient of friction | 0.27 – 0.67 | D 1894 | |
| CO2 Permeability | 273 | Ng cm m-2 s-1 | |
| O2 Permeability | 637 | Ng cm m-2 s-1 | |
| N2 Permeability | 91 | Ng cm m-2 s-1 | |
+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions
NOTE: The information, recommendations and opinions contained herein is only a guide and is intended solely for your consideration, inquiry and verification. The suitability of any material under specific conditions of application is not guaranteed in any manner. Fluorotherm™ Polymers Inc does not assume legal responsibility for the use of data presented here in any form, under any circumstances, any application, test or communication. Nothing contained herein is to be interpreted as a license or authorization to operate under or infringe any patent.
