PTFE (polytetrafluoroethylene)
PTFE is a partially crystallized fluoroplastic with exceptionally high chemical and thermal resistance (-200 to +260°C, briefly 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 with other plastics. To improve the mechanical properties, PTFE can be compounded with fillers such as glass fiber, carbon or bronze. Due to its structure, this material is formed into semi-finished products by compression molding 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 safe (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
Valid for PTFE natural and the modifications with glass fibers, carbon and conductive pigment.- Pressed plates 1200 x 1200 x 1 - 100 mm
- RAM-extruded rods 8 - 150 x 2000 mm (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
Modification by additives for the improvement of properties.- PTEE GF15 (with 15% glass fibers for increased creep strength)
- PTEE GF25 (with 25% glass fibers for increased creep strength)
- PTFE CuSn60 (with 60% bronze for increased creep strength, wear resistance and thermal conductivity)
- PTFE + graphite (for increased abrasion resistance and emergency running properties of plain bearings)
- PTFE + 25% carbon (for wear reduction and antistatic properties)
- PTFE + conductive pigment (static dissipative and approved for food use)
- Fluorosint® 207* (with mica for higher mechanical load-bearing capacity and lower coefficient of linear expansion, FDA approval)
- Fluorosint® 500* (with mica for higher mechanical load-bearing capacity and lower coefficient of linear expansion)
* This material is a registered trademark of Mitsubishi Chemical Advanced Materials.
Your personal contact
-
Heinz Otto Kuhn
CEO and Founder Application consulting, calculation and purchasing- +49 2992 9760 0
- +49 2992 9760 20
- info@kuhn-marsberg.de
-
Christian Hillebrand
Authorized Officer Quotation and cost calculation- +49 2992 9760 15
- +49 2992 9760 20
- c.hillebrand@kuhn-marsberg.de