Typical properties of ptfe astm or ul test property ptfe unfilled ptfe 25% glass filled ptfe 25% carbon filled physical d792 density lbin. Virgin teflon polytetrafluoroethylene ptfe data sheet. A complete listing of teflon fep film grades and their availability in different thicknesses is given in table 1. Samples of teflon 7c exhibit a linear increase in yield stress and an increase in the rate of workhardening with increasing rates from 1. These values will vary depending upon the individual compositions of the primers and topcoats and the systems used. Teflonpolytetrafluoroethylene an overview sciencedirect. Ptfe has useful mechanical properties from cryogenic temperatures at 500 f 280 c continuous service temperatures.
Material properties of teflon polytetrafluoroethylene. Polytetrafluoroethylene ptfe is a fluoropolymer and is commonly known by its trade name, teflon. Ptfe sheet properties outstandingdielectricproperties. Typical properties for dupont teflon industrial coatings.
Ptfe has a very high melting point and is capable of continued service at 500f 260 c. Abrasion resistance teflon coatings are very resistant to scratches and abrasion due to their excellent durability and toughness. Typical properties of teflon ptfe granular fluoropolymer resins1, 2 the mechanical toughness, electrical, and lowfriction properties of teflon ptfe make it the preferred plastic for a host of applications and processing techniques. Polymerization is a process in which molecules are. A typical teflon 7c waxs trace showing a strong crystalline peak superposed over an amorphous halo. Polytetrafluoroethylene is a fluorocarbonbased polymer and is commonly abbreviated ptfe. Ptfe polytetrafluoroethylene physical properties metric english comments density 2. Dupont teflon fep fluoroplastic film description dupont teflon fep. The nonstick property of teflon has been used in the manufacture of cookware ever since the discovery of this material. Excellent thermal and electrical insulation properties.
It is also possible to observe multiple tg from multiple copolymers or a single tg that will shift depending on polymer concentration. It resists ignition and does not promote the spread of flames. Tokarsky dupont fluoropolymer solutions chestnut run plaza wilmington, delaware 1988007 abstract. Polytetrafluoroethylene ptfe is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. General properties of teflon fep teflon fep can be described as a fluoropolymer resin having most of the excellent physical, chemical, and electrical properties of teflon ptfe fluoropolymer resin but with the ability to be processed using conventional thermoplastics processing equipment.
Dielectric properties of teflon from room temperature to 314. In 1972 dupont introduced teflon pfa, a fluoropolymer with excellent melt processability and properties rivaling those of ptfe. Typical properties for teflon industrial coatings property ptfe fep pfa etfe teflon s units astm non stick excellent good none chemical resistance goodexcellent very none abrasion resistance good fair very good excellent none salt spray resistance fair excellent none maximum use temperature continuous 500400 300 300 425 deg. Elongation 73 degrees fahrenheitd63852t 100200% hardness, durometerd67649t d50d60 coefficient of linear thermal exansion per 73 100 degrees fahrenheit d69644 5. This article comprises a survey on the performance properties of polytetrafluoroethylene ptfe fluoropolymer. Pdf the properties of polytetrafluoroethylene ptfe in. Teflon is used as a trade name for a few other polymers with similar composition, such as ethylene propylene fep and perfluoroalkoxy resin pfa the properties of these polymers are similar to those of teflon. The nonstick properties of teflon fep film have found use in conveyor belts, process roll covers, and as mold release films. The extremely strong carbonfluorine bonds in ptfe impart an outstanding combination of properties. Teflon ptfe polytetrafluoroethylene datasheet aetna plastics.
Dielectric properties of teflon from room temperature to 3140 c and from frequencies of 102 to 105 csl faul ehrlich 2 the dielectric constant and dissipation factor of teflon were measured at frequencies from 102 to 105 cis and from room temperature to temperatures just below the firstorder. Neoflon teflon fep hostaflon fep tefzel hostaflon et advantages very stiff high permeation resistance high impact strength can be melt processed excellent impact strength limitations not meltprocessable low service temperature lower service temperature than ptfe limited resistance to oils, grease, and. A few application areas of teflon are listed below. Polytetrafluoroethylene or ptfe more commonly known as teflon is a particularly versatile ivorywhite and opaque plastic fluoropolymer. It can be heatsealed, thermoformed, welded, metalized, and laminated to many other materials or serve as a hot melt adhesive. The coatings are affected by molten alkali metals and highly reactive fluorinating agents. Material density kg m k3 ir % xstal density % xstal mdsc % xstal waxs % xstal 7a teflon 2157. Polytetrafluoroethylene or ptfe is a particularly versatile ivorywhite and opaque plastic fluoropolymer. It is made by polymerizing many tetrafluoroethylene tfe molecules together. The commonly known brand name of ptfebased formulas is teflon by chemours, a spinoff from dupont, which originally discovered the compound in 1938. Other trade names for ptfe include fluorosint, interplast, rulon, and semitron esd.
Teflon fep film offers unique properties in a convenient form requiring minimal fabrication. However, in this paraffin, fluorine atoms replace all the hydrogen atoms. The extremely strong carbonfluorine bonds in ptfe impart an outstanding combination of properties to ptfe. Teflon is also known as polytetrafluoroethylene ptfe and it is a synthetic polymer. Thermal properties of teflon coatings property astm standard unit teflon ptfe teflon fep teflon pfa teflon etfe melting point d3418 c f 327 621 260 500 306 582 267 512 cure temperature c f 379429 715805 360385 680725 379399 715750 302323 575615 max.
Polytetrafluoroethylene an overview sciencedirect topics. Chemically, teflon belongs to the class of paraffin polymers. Teflon is a name we have been used to hear from our childhood as it is an important element used in nonstick cookware utensils. Teflon what is ptfe uses of teflon production of teflon. Microstructure and properties of polytetrafluoroethylene. Many materials have a wellcharacterized refractive index, but these indexes often depend strongly upon the frequency of light, causing optical dispersion.
The five basic factors that influence these endproduct properties are. In 1938, polytetrafluoroethylene dupont brand name teflon was discovered by accident by a recently hired. Unique electrical properties over a wide range of frequencies, teflon coatings have a high dielectric strength, low dissipation factor, and high surface resistivity. Ptfe is a crystalline polymer with a melting point of about 621 f 327 c. Teflon ptfe 65 x is a polytetrafluoroethylene fine powder resin used primarily for paste extrusion. The properties and advantages of polytetrafluoroethylene. Dielectric properties of teflon from room temperature to. Dupont teflon ptfe specifications typical properties of teflon ptfe astm or ul test property ptfe unfilled ptfe 25% glass filled ptfe 25% carbon filled physical d792 density lbin. Teflon is a registered trademark of the dupont company. Unique properties of ptfe include nonreactivity, hydrophobicity, a low coefficient of friction, and good insulating properties.
May 28, 2020 teflon a polytetrafluoroethylene has outstanding dielectric properties that remain stable with frequency and temperature. One of the common applications of this polymer is nonstick coating in kitchen cookware pans, baking trays etc. Superior antistick and low frictional properties high resistance to impact and tearing long time weatherability inert to outdoor exposure high transmittance of ultraviolet and all, but far, infrared reliability tefzel etfe film contains no plasticizers or other foreign materials. The commonly known brand name of ptfebased formulas is teflon by chemours, a spinoff from dupont, which originally discovered the compound in 1938 ptfe is a fluorocarbon solid, as it is a high molecular weight compound consisting wholly of carbon and fluorine. Most notably affected are flex life, permeability, stiffness, resiliency, and impact strength. Polytetrafluoroethylene or ptfe is the commonly used versatile, highperformance fluoropolymer made up for carbon and fluorine atoms. The values shown in this table represent average experiences from numerous testing sources and are not intended. Dupont fep fluorocarbon film offers the outstanding properties of fep fluoropolymer in a convenient, easytouse form. Teflon is a brand name for polytetrafluoroethylene ptfe, a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. Chemical compatibility teflon pfa film is chemically inert and solventresistant to virtually all chemicals, except molten alkali metals, gaseous fluorine. Technical data sheet teflon ptfe laminated plastics. Mechanical properties of teflon coatings crest coating inc. Virgin teflon polytetrafluoroethylene ptfe data sheet cct.
Pdf the properties of polytetrafluoroethylene ptfe. Has a somewhat higher coefficient of friction than teflon ptfe and pfa. The 7a material displayed an aberration in this linear growth between 1. The original ptfe resin was invented by dupont in 1938 and called teflon.
This means it is a man madechemical made up of two main atoms. Ptfe has excellent thermal and electrical insulation properties along with a low coeffi cient of friction. Pfa is nonreactive in nature and has a low coefficient of friction. Typical properties of teflon and tefzel fluoropolymers typical properties1 test method unit teflon ptfe teflon fep teflon pfa tefzel etfe mechanical specific gravity iso 1183 2. Uses of teflon and properties with its sample paper pdf to.
Fda conforming many teflon industrial coatings are approved for food contact by the food and drug administration. Surface scarring is minimal, especially in certain coatings when fillers are added. Teflon ptfe polytetrafluoroethylene resin teflon can be used in a a variety of applications having a combination of mechanical, electrical, chemical, temperature and antifriction properties that are unmatched. Has excellent mechanical and physical properties at enduse temperature up to 300c 572f 4. Mechanical properties of teflon coatings the values shown in this table represent average experiences from numerous testing sources and are not intended to be specifications. Introduction teflon fep 4100 a low molecular weight high. Properties bulletin description tefzel etfe film is a transparent, thermoplastic film that can be heat sealed, thermoformed, vacuum formed, heat bonded, welded, metallized, laminated combined with dozens of other materials, and used as an excellent hotmelt adhesive.
Central research experimental station wilmington, delaware 198800400 email. A complete listing of teflon fep film grades and their availability in different thicknesses is. Technical data sheet tds physical properties of ptfe and filled ptfe products. Typical properties of teflon lehigh valley plastics. For example, preforming pressure, sintering time, cooling rate, void content, and crystallinity level can have a significant effect on certain enduse physical properties, such as tensile properties, permeability, and dielectric strength. Chemical inertness to nearly all industrial chemicals and solvents superior inuse thermal stability low thermal instability. Physical properties metric english comments density 2. Dielectric properties of teflon from room temperature to 3140 c and from frequencies of 102 to 105 csl faul ehrlich 2 the dielectric constant and dissipation factor of teflon were measured at frequencies from 102 to 105 cis and from room temperature to temperatures just below the firstorder t. Mechanical properties of teflon fep retrieved from the.
The chemistry of teflon ptfe teflon ptfe is a linear and fully fluorinated highmolecular weight polymer, made by polymerisation of tetrafluoroethylene at elevated temperature and pressure fig. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy. Teflon is actually made of a chemical compound named polytetrafluoroethylene ptfe which is a synthetic fluoropolymer which has been under use for various purposes. It is characterized by a high resistance to solvents, acids, and bases. This combination of unique properties and easytouse form offers. Teflon ptfe 65 x offers the excellent combination of properties typical of teflon fluoropolymer resins. Pfa has very similar properties to ptfe, though the biggest difference between ptfe and pfa is that pfa is meltprocessed. Typical properties of teflon property astm method tensile strength, 73 degreesd63852t 1,500 3,000 lb. Chemicals includes ozone,chlorine,acetic acid ammonia,sulphuric acid and hydrochloric acid. This unusual structure leads to a material which has an almost universal chemical inertness. Teflon typical properties of ptfe ws hampshire, inc. It is most commonly used as a nonstick coating for cookware. Teflon ptfe polytetrafluoroethylene ptfe resin is in a class of paraffinic polymers that have some or all of the hydrogen replaced by fluoride.
Teflon is a registered trademark of the dupont company for its fluoropolymer. Dielectric strength is the highest voltage that the coating can withstand before it breaks down. The highperformance teflon af amorphous fluoropolymer family of products offers a unique combination of superior properties for demanding, highperformance applications. Overview of fluoropolymer materials a fluoropolymer is a fluorocarbon based polymer with multiple strong carbonfluorine bonds. Standard refractive index measurements are taken at the yellow doublet sodium d line, with a wavelength of 589 nanometers.
Teflon fep fluorinated ethylene propylene surfaces on the hubble space telescope hst have experienced significant degradation in mechanical properties during nearly ten years of exposure in. Mechanical properties are often enhanced by adding fillers see paragraph below. The teflon af family of afs is similar to teflon ptfe and pfa in many of the usual properties but is unique in the following ways. Teflon is nonstick in nature and has low friction and good dielectric properties. Mechanical and electrical properties properties of pfa and fep insulation the combination of chemical and physical properties of fep, pfa and neoflon is a result of its true fluorocarbon structure. Teflon and tefzel tm dupont hostaflontm dyneon neoflontm daikin kynartm elf atochem solef tm solvay may 2000, r0 scscatalogs, product and technical.
1340 1155 392 1567 1174 1423 818 1322 524 1123 982 1388 665 149 384 454 1659 1542 194 319 200 671 1202 1521 343