The result of a unexpected discovery, PTFE TEFLON is one of the most widely used high-performance materials in the industry. More than 80 years after that discovery, the TEFLON™ brand continues to affirm the undeniable quality for this material. Today, PTFE has become common product and many producers have...
For more than 80 years, SPN has been developing innovative products from high-performance polymers. Among a dozen materials processed, SPN produces fluorinated polymers, including the best known, PTFE. This material with remarkable properties has been a historical pride of SPN since the manufacture of masks for fighter pilots. Let's...
PTFE is used in many seals because it has remarkable properties (see PTFE article) especially in the industrial valves, cryogenics and chemical sectors. PTFE is used in extreme environments such as low temperatures, corrosive chemicals, or low friction coefficient. One of the major defects of PTFE is creep, i.e. deformation...
The name Kel-F81®, from MW Kellogg's company, came into being after the Second World War. It is an abbreviation of the name "Kellogg" and "fluoropolymer" for PCTFE material. It was acquired by 3M Company in 1957, but the company discontinued manufacturing Kel-F® in 1996. Currently, the Kel-F® brand remains...
Thanks to the particularly exceptional properties of polymers, they are often used as solid lubricants in the field of tribology, especially in cryogenic environments. At atmospheric pressure, cryogenic fluids have very low viscosities. For liquid oxygen, the viscosity is 0.20-10-3Pa-s and for liquid nitrogen it is 0.16-10-3Pa-s [25]. This makes...
In cryogenic environments, PTFE (polytetrafluoroethylene) and PCTFE (polychlorotrifluoroethylene) are the most commonly used fluoropolymers. Fluoropolymers are polymers where the atoms have been modified. Concretely, by substitution, fluorine atoms have taken the place of hydrogen atoms. This process of atom substitution has improved the chemical resistance and thermal resistance of...
PFA or high purity perfluoroalkoxy is a material with properties inherited from PTFE and FEP. Thanks to its flexibility and clarity, PFA is the material of choice in laboratories and in the pharmaceutical industry, but it is also used in other technological areas. The wide temperature range from -200°C...
Due to their obvious properties, polymer materials called PPS or polyphenylene sulfides are frequently used in the manufacture of electromechanical components: contactors, switches, plugs, coils, relays or switches. But the applications are obviously numerous, as these materials have excellent mechanical and electrical resistance. PPS are available in many grades, but...
In terms of cryogenic sealing, two main polymers used on the market are : PCTFE or PTFCE - polychlorotrifluoroethylene - and PTFE - polytetrafluoroethylene - and more specifically MPTFE, i.e. modified PTFE (TFM® or NXT®). These polymers are very much in demand, particularly in cryogenic sealing systems, thanks to their...
PCTFE machining For 80 years, the Société des Plastiques Nobles or SPN has been a reference in the transformation and machining of high performance materials such as PCTFE. At SPN, processing is carried out using creep, extrusion and compression moulding processes. Semi-finished products such as bars, tubes and plates are...
