• Home
• Dollfus & Muller
  • Dollfus & Muller History
  • Dynajet and Dollfus & Muller
  • Dollfus & Muller movie
  • 200 years
  • Our partners
  • Legal information
  • Dollfus & Muller Quality
  • Dollfus & Muller Services
  • Agency proposals
• Textile belts and felts
  • Your application
    • Printing dryer belts and transfer printing felts
    • Compacting felts, belts for tensionless dryers, Teflon® sheets and roll coverings
    • Sanfor felts and rubber belts
    • Non woven applications : woven fabrics
  • Our local agents
• Tannery felts
  • Your application
    • Sammying felts : synthetic felts or mixed felts
    • Setting out felts and sleeves
    • Belts for drying tunnels
    • Ironing & Embossing felts
  • Our local agents
• Other industries
  • Airslide fabrics for Alumina processing
  • Airslide fabrics for Cement processing
  • Airslide fabrics for Plaster processing
  • Belts for carpet yarn processing
  • Belts for coating lines
  • Belts for dryers
  • Belts for flocking lines
  • Fabrics for Biscuit manufacturing
  • Felt polishing discs
  • Felts for bakery
  • Felts for calenders
  • Felts for protective packaging
  • Felts for sludge dewatering
  • Felts for the printing of engravings
  • Woven fabrics used as a filter
  • Woven fabrics for saltspreaders
  • Woven hemp fabric for wool felting machines
• Machineries
  • Printing dryer
  • Transfer Printing calender
  • Compacting machine and calender for knitted fabric processing
  • Sanforizing machine
  • Decatizing machine
  • Sammying machine
  • Setting out machine
  • Embossing machine
• Our References
• FAQ
  • FAQ General
  • FAQ Conveyors
  • FAQ Compacting Felts
  • FAQ Sanforizing Felts
  • FAQ Woollen Fabrics
  • FAQ Leather
• Contact
  • Dollfus & Muller contacts
  • Our Agents
  • Find us
  • Privacy Policy

FAQ

• FAQ General
• FAQ Conveyors
• FAQ Compacting Felts
• FAQ Sanforizing Felts
• FAQ Woollen Fabrics
• FAQ Leather

• Home
• > FAQ

What is PTFE?

Chemical Formula of the PTFE

                     

Generalities of the PTFE

Dollfus & Muller is manufacturing PTFE coated belts for printing dryers and relax dryers and PTFE sheets which are used as compactor introductory sheets.

PTFE (etymology: tetra-fluoroethylen + on ending for plastic materials) is the registered trademark since 1945 for polytetrafluoroethylen (PTFE) in common language from the American company DuPont de Nemours. This Polymer is thermostable, has a huge chemical inertia and an anti sticking power.

Physical characteristics of the PTFE

• Density: 2.2
• Friction Coefficient: 0.05 to 0.1 (3rd most down friction coefficient, after the BAM and the diamond carbon)
• The only surface on which a gecko cannot climb (thanks to its resistance to Van de Waals forces)

Thermical Characteristics of the PTFE

• Properties deterioration : 260 °C

• Decomposition point : 350 °C

• In high temperature emit a harmful gas 

Mechanical characteristics of the PTFE

• Young Module : 0.5 GPa

• Maximum constraint : 23 MPa

 Chemical Characteristics of the PTFE

• Chemically inert

• High resistance to the corrosion