Thermoplastic resins PTFE resin

Polytetrafluoroethylene (Teflon) (PTFE) is the most corrosion-resistant thermoplastic polymer. This polymer is resistant to practically every known chemical or solvent combination and has the highest useful temperature of commercially available polymers. It retains its properties up to 500°F (260°C). Because of its exceedingly high molecular weight PTFE is processed by sintering. The PTFE resin is compressed into shapes under high pressure at room temperature and then heated to 700°F (371°C) to complete the sintering process. 

Algoflon L203, L205, L206 - micronized PTFE powders for apphcations in thermoplastic and thermosetting resins, printing inks, paints, oils and greases, and rubber. The lower the number the smaller the particle size. 

CAS 9002-84-0 EINECS/ELINCS 204-126-9 Synonyms Poly (ethylene tetrafluoride) Polytef Polytetrafluoroethene Polytetrafluoroethylene resin PTFE (INCI) Tetrafluoroethene homopolymer Tetrafluoroethylene polymer Tetrafluoroethylene polymers Tetrafluoroethylene resin Classification Thermoplastic homopolymer Definition Polymer of tetrafluoroethylene Emprkal (CiF,),... 

PTFE has a very low coeflicient of friction (0.04) and is therefore useful as an internal lubricant processing aid. As the PTFE particles are inert, processing and physical properties of the thermoplastic resin are not adversely affected. The optimum loading is typically 15-20 wt% PTFE. As a result of the improved resistance to surface wear and slip, thermoplastic products containing PTFE retain longer their surface appearance while in use [38]. 

Skiving skiv-ipi vf skived skiving [prob. of Scand origin akin to ON skifa to slice] (ca. 1825) Slicing off a thin layer. Skiving is the method by which veneers are cut from logs and by which polytetrafluoroethylene film is produced from cylindrical bars of ram-extruded or sinter-molded resin. PTFE film is made in this way because, unlike most thermoplastics, it cannot be directly extruded into film. 

Fluorocarbons a group of thermoplastic resins which are very strong, tough and stable with excellent temperature and electrical properties. Used for electrical components and as bearing materials. Group includes FEP, PTFE and PCTFE (qv). 

Plastics. Almost all commercial plastics find some use both dry and lubricated for sliding at low speeds and light loads the most commonly used thermoplastics are nylon, acetal resins, and polytetrafluoroethylene (PTFE). Typical thermosetting resins for bearing appHcations are phenoHcs, polyesters, and polyimides. Table 8 compares the characteristics of plastic bearing materials with those of graphite, wood, and mbber which find use in somewhat similar appHcations. 

These materials were first introduced by Du Pont in 1956 and are now known as Teflon FEP resins. (FEP = fluorinated ethylene-propylene.) Subsequently other commercial grades have become available (Neoflon by Daikin Kogyo and Teflex by Niitechim, USSR). These copolymers may be regarded as the first commercial attempt to provide a material with the general properties of PTFE and the melt processability of the more conventional thermoplastics. 

The need for highly fluorinated thermoplastic polymers that, unlike PTFE, could be fabricated by conventional melt-processing methods led to the development of a group of resins that are copolymers of tetrafluoroethylene (TFE) with other perflu-orinated monomers. Commercially, the copolymer of TFE and hexafluoropropylene (HFP) is commonly known as fluorinated ethylene propylene (FEP). Copolymerization of TFE with perfluoropropylvinyl ether (PPVE) leads to PFA resins, and copolymerization of TFE with perfluoromethylvinyl ether (PMVE) produces MFA resins. 

Perfluoroalkoxy resin (PFA) Copolymer of tetrafluoroethylene (TFE) with perfluoro(propylvinyl ether), an engineering thermoplastic characterized by excellent thermal stability, release properties, low friction and toughness. Its performance is comparable to poiytetrafluoroethylene (PTFE) with the difference that it is melt processible. 

PTFE Teflon Politef Tetrafluoroethylene Resin Fluor Tetran. Versatile, chemically inert thermoplastic homopolymer. Used as tubing or sheeting for chemical laboratory and process work gaskets and pump packings as electrical insulators especially in high frequency applications, filtration fabrics, protective clothing, prosthetic aids. White solid usable between -270° and 265°. DuPont Janssen Chimica. 

Plaslube . [Akzo Engineoing Plastics] Acttal, nylon 6, 6/6, 6/12, PC, or PPS resins lubricated with PTFE, silicone, molybdenum disulfide, or carbon. internally lubricated engineering thermoplastics. 

Copolymers of tetrafluoroethylene were developed in attempts to provide materials with the general properties of PTFE and the melt process-ability of the more conventional thermoplastics. Two such copolymers are tetrafluoroethylene-hexafluoropropylene (TFE-HFP) copolymers (Teflon FEP resins by Du Pont FEP stands for fluorinated ethylene propylene) with a melting point of 290°C and tetrafluoroethylene-ethylene (ETFE) copolymers (Tefzel by Du Pont) with a melting point of 270°C. These products are melt processable. A number of other fluorine containing melt processable polymers have been introduced. 

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