General material information without obligation
PTFE (2,16 g/cm³) is a very heavy, partially crystalline technical thermoplastic with a Shore D hardness of 55-60. Its structure is CnF2n and it belongs to the class of polyhalogenolefines. Indeed PTFE is a thermoplastic material, but with near melting and disintegration temperature. Due to this PTFE can be as a rule only processed by sintering or pressure sintering and degrees of freedom for design are limited to simple designs. It was detected in 1938 by Roy Plunkett and was applied for a patent in1941 by Dupont. PTFE bends to creep under pressure and has to be stabilized by addition of glass fibers or other strength increasing additives. PTFE is very less reactive. Self aggressive acids like aqua regia cannot attack PTFE. PTFE has one of the lowest coefficients of friction of solid materials.
PTFE slips on PTFE like wet ice on wet ice. Also sticking friction is equal to sliding friction so that the transition from standstill to movement acts without the stick-slip-effect. One impressive practise example for that was the movement of the new 12,500 tons heavy Oberkassel Bridge in Düsseldorf/Germany for 47,5m on PTFE slide bearings on April 7th and 8th 1976. It exist nearly no material with adhere to PTFE, due to the extremely low surface tension. PTFE is supremely resistant to all acids and lyes, alcoholes, ketones, oils, etc. and is not resistant to sodium. Furthermore PTFE is resistant to frost down to −200 °C; only glue able after pretreatment; physiological harmless; not combustible. Its natural colour is due to standard types covering white. The working temperature reaches up to 260 °C. PTFE melts at 327 °C and disintegrates above into high aggressive hydrogen fluoride acid and high toxic pyrolysis products.
Since a few years PTFE is being used for the range of furniture glides. There a unique composit of rubber and PTFE can be named, which delivers an excellent silencer and an optimal floor protection so as minimal values for sticking and sliding friction while moving furniture. This type as a rule is a 2-3 mm flat and one side spherical rubber circular blank (square and rectangular, too) on which is applied a more 1/10 mm strong foil of PTFE under high pressure and temperature. These universal slide inserts can bei equipped with a nail for wooden chair legs or other wooden furniture, can be glued on or can be inserted in furniture glides. Please look at our WebShop range under the category "Glides (furniture, framework)" for article series UG/RE, UG/RU, UGN/RU, GLUG, GGUG2000 and KKSGUG. PTFE slide inserts are useful for easy moving of furniture on the most floors. PTFE slide inserts makes moving of furniture on textile floors much easier. For seating furniture on smooth floors PTFE is not suitable, because seating furniture move unintended.