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| Material: | PCTFE |
| Kind: | Hard Plastic Rods |
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Kel-F® (PolyChloroTriFluoroEthylene) is a fluorocarbon based polymer and is frequently abbreviated as PCTFE. PCTFE combines physical and mechanical properties, non-flammability, chemical resistance, near zero moisture absorption and excellent electrical properties not found in any other thermoplastic fluropolymer.
Kel-F® also known as PCTFE or CTFE has many of the properties similar to other fluoropolymers such as PTFE, FEP, or PFA, but is mechanically superior in rigidity and has very low gas permeability.
Kel-F® maintains an outstanding electrical-insulating capability through thermal cycling and in high humidity environments. This material's high compressive strength and dimensional stability make it a good choice for structural material, while its low outgassing rate and permeability make PCTFE a great choice for laboratory, aerospace, flight applications, and instrumentation.
Please Note: The Kel-F® brand belongs to 3M, but their production was discontinued in 1995. The only remaining resin is made by Daikin Industries of Japan and called Neoflon®.






PCTFE is a homopolymer of chlorotrifluoroethylene. PCTFE is melt processible and can be extruded or molded. PCTFE has a number of unique properties. In addition to excellent thermal and chemical stability, it has very low moisture absorption and permeation. It also is highly resistant to cold flow, is very rigid, is tough, has excellent dimensional stability and extremely good low temperature properties. It is especially applicable as a valve component material in cryogenic fluid service.| Property | Value | Units | Method |
| MECHANICAL PROPERTIES | |||
| Tensile Strength | 4860 - 5710 34 - 39 |
psi MPa |
D 638 |
| Elongation | 100 - 250 | % | D 638 |
| Flexural Strength, 73°F | 9570 - 10300 66 - 71 |
psi MPa |
|
| Flex Modulus | 200 - 243 x 103 1.4 - 1.7 |
psi MPa |
|
| Impact Strength, Izod, 23 deg C | 2.5 - 3.5 | ft-lb/in | D 256 |
| Compressive Stress at 1% deformation, | 1570 - 1860 11 - 13 |
psi MPa |
D 695 |
| Density | 2.10 to 2.17 | gm/cu.cm | |
| THERMAL PROPERTIES | |||
| Coefficient of Linear Expansion | 7 x 10-5 | K-1 | |
| Melting Point | 410 -414 210 - 212 |
deg F deg C |
|
| Thermal Conductivity | 1.45 0.84 |
Btu·in/h·ft2·°F W/m·K |
ASTM C 177 |
| Specific Heat | 0.22 0.92 |
Btu/lb/deg F kJ/Kg/deg K |
|
| Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa) | 259 126 |
deg F deg C |
D 648 |
| Processing Temperature | 620 327 |
deg F deg C |
|
| ELECTRICAL PROPERTIES | |||
| Dielectric Strength, short time, 0.004" | 3000 | Volt/mil | D 149 |
| Arc-Resistance | 360 | sec | D 495 |
| Volume Resistivity, @ 50% RH | 2 x 1017 | ohm-cm | D 257 |
| Surface Resistivity, @ 100% RH | 1 x 1015 | Ohm sq-1 | D 257 |
| Dielectric Constant, 1 kHz | 2.6 | ε | D150-81 |
| Dissipation Factor, @ 1 kHz | 0.02 | D150-81 | |
| OTHER PROPERTIES | |||
| Water Absorption | 0.00 | % increase in weight | D570-81 |
| Flame Rating+ | Non-flammable | D 635 | |
| Coefficient of friction | D 1894 | ||
| Specific Gravity | 2.10 to 2.17 | D792 | |
| Moisture Permeability Constant | 0.2 | g/m, 24 hours | |
| O2 Permeability | 1.5 x 10-10 | Cc, cm/sq.cm, sec, atm | |
| N2 Permeability | 0.18 x 10-10 | Cc, cm/sq.cm, sec, atm | |
| CO2 Permeability | 2.9 x 10-10 | Cc, cm/sq.cm, sec, atm | |
| H2 Permeability | 56.4 x 10-10 | Cc, cm/sq.cm, sec, atm | |
+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions
| Material | Brand | Size (Rod) | Services | Application |
| PCTFE | MBH | Dia. 4 /5/6/7/8/9/10/13/16/18/22/ 25/26/40/45/50/55/ |
sheet/rod extrusion and machining and plastic modified services |
medical, pharmaceutical, and semi-conductor, Aerospace, Auto etc. |














