Resources
The following information on Comparison Data and Chemical resistance is listed here as a guide only to help you assess which materials and parts may be suitable for your fluidic system needs. Please do not hesitate in contacting us for further information or support if required. As well as the standard materials listed we are able to advise you on other materials available as non-standard items.
Comparison Data |
PTFE | PEEK | PoM(Acetal) | PVDF | PCTFE | ETFE | PP | Nylon (6) |
Chemical Name |
PolyTetraFluoro Ethylene |
PolyEtherEther Ketone |
PolyOxy Methylene |
PolyVinyli DeneFluoride |
PolyChloroTri FluoroEthylene |
PolyEthylene TetraFluoro Ethylene |
Poly Propylene |
Polyamide 6 |
Common Trade Names |
Teflon™ | Delrin™ | Kynar™ | Kel-F™ | Tefzel™ | |||
Colour |
White | Beige | White or Black | Cream | Opaque | Opaque | Opaque | Cream |
Main Benefits |
Excellent Chemical Resistance Good UV Resistance Excellent Non-Stick Good Electrical Insulation |
Good Chemical Resistance Good Machinability Resistant to Gamma Radiation |
Good Machinability Tough Good Electrical Insulation |
Good Machinability Tough Good Electrical Insulation |
Excellent Chemical Resistance Tough Good Electrical Insulation Good Machinability Limited porosity |
Good Chemical Resistance Good UV Resistance Slightly elastomeric |
Reasonable Chemical Resistance Cost Effective Good to mould |
Good Sliding Properties Good Machinability Easily welded |
Main Disadvantages |
Difficult to bond Soft Porous |
Poor 'Sticktion' Expensive |
Difficult to bond Poor chemical compatibility |
Difficult to bond | Difficult to bond Expensive |
Expensive | Poor Machinability Lower working temperature |
Absorbs water |
Applications |
Seals Gaskets Valve Seats |
Valve Casings Gears |
Precision Parts Non wetted parts |
Manifolds | Valve rotors Vacuum Technology |
Seals Ferrules |
Moulded Products | Moulded products Rollers |
Density g/cm3 |
2.18 | 1.32 | 1.41 | 1.77 | 2.09 | 1.7 | 0.9 | 1.13 |
Melting Point ⁰C |
327 (decomposition Temp) | 343 | 165 | 172 | 216 | 220 | 130 | 220 |
Max Working Temp⁰C |
260 | 260 | 100 | 150 | 150 | 150 | 100 | 100 |
Thermal Conductity (W/m K) |
0.25 | 0.25 | 0.31 | 0.11 | 0.24 | 0.24 | 0.15 | 0.23 |
Thermal Expansion 10-5 K |
12 | 10 | 10 | 13 | 6.5 | 13 | 14 | 8 |
Flammability |
V0 | V0 | HB | 13 | V0 | V0 | HB | HB |
Chemical Resistance |
||||||||
| Acids | Excellent | Good except strong oxidising acids | Poor | Good | Excellent | Good | Fair | Poor |
| Alkalis | Excellent | Excellent | Poor | Fair | Excellent | Good | Good | Poor |
| Alcohols | Excellent | Excellent | Fair | Good | Excellent | Good | Fair | Fair |
| Oil | Excellent | Excellent | Good | Good | Excellent | Good | Fair | Good |
| Halogens | Excellent | Excellent | Poor | Fair | Excellent | Good | Poor | Poor |
| Ketones | Excellent | Good | Fair | Fair | Excellent | Good | Fair | Good |
