PTFE (polytetrafluoroethylene)
PTFE is a partially crystallized fluoroplastic with exceptionally high chemical and thermal resistance (-200 to + 260 ° C, short-term up to 300 ° C).
In addition, the thermoplastic material has excellent sliding properties, an anti-adhesive surface and best insulation properties. However, this is offset by low mechanical strengths and a high specific weight compared to other plastics. To improve the mechanical properties of PTFE, it can be provided as a compound with fillers such as glass fibre, carbon or bronze. Due to the structure of this material, it is formed by compression moulding into semi-finished and then machined.
Properties
The properties of PTFE are:- Very good sliding properties (the lowest friction coefficient of all solid materials)
- Can be used over a very wide temperature range (-200 ° C to + 260 ° C)
- Very good chemical resistance
- Resistant to hydrolysis and hot steam
- No moisture absorption
- Physiologically harmless (BGA and FDA approval)
- Very good UV resistance
- Very good damping properties
- Good electrical insulation capacity (unfilled type)
- Moderate mechanical strength
Applications
PTFE can be used in the following areas:- Chemical industry: pipes, valves, gaskets, linings, membranes
- Mechanical engineering: wipers, scrapers, piston rings, seals, plain bearings
- Electrical engineering: bobbins, components for insulation
Availability
Applies to pure PTFE and the modifications PTFE + GF, PTFE + carbon and PTFE + conductive pigment- Pressed plates 1200 x 1200 x 1-100
- Ram-extruded rods 8 - 150 x 2000 (not for PTFE + conductive pigment)
- Pressed blanks in many different dimensions and material mixtures, maximum length of 330 mm (please send us your request)
Modification options
- PTEE + glass fibre = increasing creep strength
- PTEE + coal = wear reduction, antistatic
- PTFE + conductive pigment = static dissipative, approved by food laws
- PTFE + mica (Fluorosint® 207) = higher mechanical load capacity and lower coefficient of linear expansion, FDA approval
- PTFE + mica (Fluorosint® 500) = higher mechanical load capacity and lower coefficient of linear expansion
- PTFE + antistatic agent (Semitron® ESd 500HR) = static dissipative
- PTFE + bronze = increasing the creep rupture strength, wear resistance and thermal conductivity
- PTFE + graphite = increase of the abrasion resistance and emergency running properties of plain bearings
- PTFE + V2A = improvement of mechanical properties
Your personal contact
-
Christian Hillebrand
Authorized officer Contact for costing and purchasing- +49 (0) 29 92 / 97 60 - 15
- +49 (0) 29 92 / 97 60 - 20
- c.hillebrand@kuhn-marsberg.de
-
Dieter Häger
Contact for application consulting- +49 (0) 231 / 20 62 369
- +49 (0) 29 92 / 97 60 - 20
- d.haeger@kuhn-marsberg.de