Page 345 - BOLA Catalogue

TECHNICAL INFORMATION
BOLA Materials
ETFE – Ethylen-Tetrafluorethylene Copolymer
Partly fluorinated ethylene-tetrafluorethylene copolymer. Unlike the high-molecular PTFE which can be processed only by means of pressing or sintering, ETFE can be thermoplastic processed as already described before for PFA and FEP. I. e. this plastic material can be injection moulded or extruded with appropriate machines. In laboratories, this material is mainly used as compound with glass fibres for e. g. screw caps or screw joints. ETFE films have an excellent tear resistance. They are pervious to UV-rays and are therefore used for laboratory green houses as the VIS as well as the UV spectrum of the sun light can pass.
PVDF – Polyvinylidene Fluoride
A fluoroplastic that can be machined or thermoplastic processed. Characterised by a good to excellent che- mical resistance. Unlike PTFE, it is much harder and more rigid but its functional temperature range is lower. Within the range of fluoropolymers, PVDF is the best qualified self-supporting structural material due to its high rigidity. Its advantages over other fluoroplastics are its easy processing, the high mechanical values and the low specific weight. PVDF is mainly used for the production of components used in high-purity water supply systems. It is the only fluorothermoplastic with piezoelectric properties.
PVF – Polyvinylfluoride
Containing fluorine, it displays a stronger chemical linkage than common polymers and thus a better inherent stability. It shows its unique properties when used at temperatures ranging from -70 °C to +110 °C, whereas temperatures of up to +200 °C can be withstood. Polyvinylfluoride does not contain any softener, is resistant to fading and can be easily cleaned due to its dirt-repelling surface. In particular, foils, films and bags for gas analysis are made of PVF.
THV – Tetrafluorethylene-Hexafluorpropylene-Vinylidenfluoride Terpolymer
THV consists of the monomers tetrafluorethylene, hexafluorpropylene and vinylidenfluoride. This fluorother- moplastic has properties close to those of elastomers but does not require vulcanization. This material can be thermoplastic processed by injection moulding or extrusion. Due to the low processing temperature of approx. +200 to +250 °C a corrosion resistant construction of the processing machines might not be neces- sary. In laboratories, THV is mainly used for non-permeating tubing especially for the transport of hydrocar- bons, fuel or mineral oils. In the lab and production areas of the semi-conductor and photovoltaic industry, THV is the preferred material for clean-room curtains as well as for blind tiles and cover plates for machines as it is one of few plastic materials which are FM 4910 approved. This standard includes a low inflammability, low build-up of soot of grime while burning in an external flame, low release of toxic products in case of fire.
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Trade names
Fluon® ETFE Resins by AGC Chemicals Europe
Tefzel® by Chemours DyneonTM Fluorothermo- plastics ETFE by Dyneon
Trade names
Solef® PVDF by Solvay Kynar® PVDF by Arkema
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Trade names
Tedlar® Foils by DuPont
Trade names
DyneonTM Fluorothermo- plastics THV by Dyneon