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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