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

Datasheets

Your personal contact

Stefan Geis
Contact for order processing
- +49 (0) 29 92 / 97 60 - 32
- +49 (0) 29 92 / 97 60 - 20
- s.geis@kuhn-marsberg.de
Thomas Kuhn
Managing Director Contact for application consulting and costing
- +49 (0) 29 92 / 97 60 - 0
- +49 (0) 29 92 / 97 60 - 20
- info@kuhn-marsberg.de