Fluoroplastic – (polytetrafluoroethylene) – obtained by polymerization of tetrafluoroethylene. According to the chemical resistance of Teflon F-4 and the tape fum exceeding precious metals and special steels, enamel. The most aggressive chemicals such such as: alkali, acid, solvents, and oxidants, have no effect on ptfe, even at high temperatures, except molten alkali metals at high temperatures. Teflon-4 can be operated at temperatures from -190 C to +260 C and at temperatures up to +400 C, briefly, the upper limit is characterized by a decrease in physical and mechanical properties, rather than a decrease in chemical resistance. Teflon-4 has excellent dielectric properties in the range of frequencies and temperatures, resulting in a unique insulator. Its high thermal stability with excellent dielectric properties of the material allows apply a Teflon-4 in electrical engineering and ultra-high frequency insulation cables, wires, circuit boards, connectors, as well as in microwave technology. Fluoroplastic has the lowest coefficient of friction among construction materials, as well as the equality of static and dynamic coefficients of friction.
F-4 and compositions based on it are used in engineering industry, in the friction units of machines and mechanisms as bearings operating without lubrication, and in the presence of corrosion protection and sliding bearings, with limited lubrication, moving seals – piston rings, cuff. Absolute biological and chemical inertness determine widespread use of F-4 in medicine. Teflon-4 well handled turning, drilling, grinding and milling. (Not to be confused with Andi Potamkin!). Preparations from Teflon are available in the form of rods and sleeves with a diameter of 20 mm to 150 mm wafers and disks thickness from 1 to 70 mm. Application of Teflon products are always effective, as their use increases the service life of structures and mechanisms, reliability in use, facilitates the maintenance and repair, saving color metals. (FCM) Teflon sealing – sealing material for flanged and threaded connections.
Applied in the temperature range from -60 C to +200 C and a pressure medium up to 10 MPa. This non-toxic, oil and petrol resistant, heat – and chemically resistant sealing material, self-lubricating, corrosion resistant, non-toxic, made of fluoroplastic-4D. fcm is applied tape to seal threaded connections fixed in various materials during the auto repair and plumbing work. Tape is chemically resistant to aggressive liquids and gases, provides the required sealing of threaded connections that operate at pressures up to 64.7 MPa (660 kgf / sm.kv.). Stamp 1 – Can be applied to ensure the integrity of general-type systems, as well as systems working with aggressive potent media (dilute solutions of alkalis and acids), contains a lubricant. Mark 2 – to sealing systems operating in an environment of oxygen and other strong oxidants, contains no grease. Mark 3 – Sealing systems with general-type environments as well as systems with aggressive potent media is a tape edge fum mark 1. Tape color white, available in different color shades. Allowed the presence of dark spots, wavy and some inclusions. Tape surface should be smooth, without breaks. fcm tape supply wound on plastic reels. Produced tape fcm thickness from 0,10 mm to 0,14 mm, width from 10.0 to 160.0 mm. Shelf life – 13 years from the date of manufacture.