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New PTFE Components for problems with sealing and friction from FTL Technology

Constant innovation in manufacturing techniques allows FTL Technology to offer more state of the art technology in PTFE. New developments include cost effective injection moulded parts in PTFE, tubes and components in PFA, Porous PTFE and PTFE foils and films. If you have problems that the many unique properties of PTFE can solve, including low friction, wide temperature range, virtually universal chemical range, please contact us.

PTFE SYNTHESIS

Polytetrafluoroethylene (PTFE) is a partially crystalline substance obtained from the monomer tetrafluoroethylene (TFE by polymerization. The macro-molecules created in this process have a linear structure. PTFE's chain structure has two interesting characteristics:
The carbon chain is almost completely shielded by fluorine atoms, thus being protected from external influences. The carbon-fluorine combination is one of the strongest bondings in organic chemistry (dissociation energy: 460 Kj/mol). This gives PTFE its exceptionally high chemical and thermal resistance.

Modified PTFE

Modified PTFE is obtained from the monomer, tetrafluoroethylene (TFE) and a modifier (which is perfluorinated as well), perfluoropropylvinylether (PPVE). The shorter molecular chains (compared to PTFE) have a higher tendency to crystallize. This would degrade the mechanical properties of the material. The modifier effectively inhibits crystallization. This means that with modified PTFE it is possible to combine thermo-plastic property components - due to the shorter molecular chains - with the good mechanical properties of standard PTFE.

PHYSICAL AND CHEMICAL PROPERTIES OF UNFILLED PTFE

Special Characteristics
This material is characterized by a concentration of outstanding properties which is unique in the family of plastics. Including an exceptionally wide thermal application range from -260°C up to +260°C (short-term up to 300°C) and a virtually universal chemical resistance.
Additionally the material is light, weather and Hot water vapour resistant. It has very good sliding properties and is anti-combustible ; (LOI > 95). Unfilled PTFE has good electric and dielectric properties and exhibits no absorption of water. It is physiologically harmless (with BgVV, EU and FDA approvals for use with foodstuffs)

Benefits of Modified PTFE
While retaining the positive properties that are typical for PTFE, modified PTFE has additional benefits. Cold flow is reduced by the factor of 3, with reduced permeation of chemicals and gas down to half of the PTFE value. Porosity is reduced to half of PTFE's porosity and there is a minimum tendency for pore formation during drawing processes. Modified PTFE IS Suitable for welding, using special methods

Further Information
For more infomation please contact Tony Snowdon at FTL Technology on 0113 252 1061 or e-mail tonys@ftltech.co.uk