The name Kel-F®, from MW Kellogg's company, came into being after the Second World War. It is an abbreviation of the name "Kellogg" and "fluoropolymer". It was acquired by 3M Company in 1957, but the company discontinued manufacturing Kel-F® in 1996. Currently, the Kel-F® brand remains the most commonly...
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...
Turning PA66 SPN offers its services for all plastic component turning operations. SPN is equipped with various machine tools for such operations. The SPN team uses conventional lathes or numerical lathes for the machining of these plastic parts, this is done according to the specifications of its customers. The company...
PEEK Turning PEEK is one of the components that SPN offers for turning. This delicate operation involves the machining of plastic parts through material removal. Only parts with an axis of revolution can be turned. For turning PEEK - and other plastics - SPN has purchased machine tools with proven...
Milling PA66 Some plastic parts can be manufactured using milling technology. This operation is dedicated to parts that do not have an axis of revolution. It consists of holding the material in a fixture or vice on a milling table. A cutting tool, such as a milling cutter, a lathe...
