PTFE is a thermoplastic polymer, which is a white solid at room temperature, with a density of about 2200 kg/m 3 and a melting point of 600 K (327 C; 620 F). FEP (Fluorinated Ethylene Propylene), like PTFE, has a fully fluorinated structure which leads to excellent chemical, thermal, and electrical properties. THERMAL D696 Coefficient of Linear Thermal Expansion (x 10-5 in./in./F) 7.5 6.4 6.0 D648 Heat Deflection Temp (F / C) at 264 psi 132 / 55 150 / 65 Polytetrafluoroethylene (PTFE) is a high molecular weight polymer, one of the most versatile plastic materials known and useful for a large range of products in the high-tech market sector. TEFLON PROPERTIES : THERMAL: Properties: ASTM: PTFE: PFA: FEP: ETFE: ECTFE: Maximum Service Temp. . In this work, hBN platelets and aluminum nitride (AlN) particles are used as hybrid fillers to improve the thermal conductivity of polytetrafluoroethylene (PTFE). Modified PTFE, Filled PTFE are major growth sectors in PTFE and market increment is @ 15% p. a. Threshold When PTFE is exposed to radiation in air, it's damage threshold is 2-7 x 10 4 2. Vacuum Below is a table showing the specific properties and value of PTFE. Tensile Strength. PTFE can be used in a temperature range from -200C (-328F) to +260C (500F). In comparison with unfilled PTFE the compressive modulus of filled PTFE is greater and hence, for the same stress, a lower deformation will occur. This page shows summary ranges across all of them. PTFE can have fillers added blending with base PTFE resin to enhance specific properties. Characteristicssuch as type, particle shape and size and the chemical composition of the fillergreatly affect the properties of the compound. At 260 degrees Celsius, its fracture strength still maintains at 5MPa (about 1/5 at room temperature), and the bending strength is up to 1.4MPa. TYPICAL PROPERTIES of PTFE ASTM or UL test Property PTFE (unfilled) PTFE (25% glass filled) PTFE (25% carbon filled) PHYSICAL D792 Density (lb/in) (g/cm) 0.078 2.16 0.081 2.25 . PTFE powder produced by light chemical industry research institute, the particle size of 20 ~ 40 microns, density of 2. This difference diminishes, however, as temperatures rise and the compressive performance of unfilled and filled PTFE draws close together at 200C (392F). Maximum Temperature: Mechanical. Many fillers, notably metals and metal oxides, have high thermal conductivity, but in general they are effectively encapsulated by PTFE so that the conductivity of the compounds is still relatively low. Its coefficient of friction is among the lowest of all polymers (self-lubricating and non-stick). Melting . The thermal conductivity of PTFE is very low, making it a good thermal insulating material. PCTFE - Poly (chloro trifluoro ethylene) TYPICAL PROPERTIES However, the high temperature limit for FEP is lower than PTFE, approximately 200C instead of 260C. PTFE membrane is easy to decompose at low potential. PTFE tubing is also an excellent insulator with surface resistivity of 3.6 X 1012 ohms (even at 100% relative humidity). This layer of fluorine atoms acts as a barrier and is responsible for the high corrosion resistance and electrical inertness of PTFE. PVDF membrane is used in the low-potential test area of the negative electrode material. 2. Introduction Polytetrafluoroethylene (PTFE) is a kind of important fluoropolymer with a low friction coefficient, high chemical resistance, fire-retardant properties and high thermal stability, which is widely used in various high-end applications, such as aerospace, the automotive industry, chemical engineering, biomedicine and heat management. Our processing methods ensure a consistent and repeatable pore structure that provides outstanding strength, durability, chemical and thermal resistance, and design flexibility across multiple markets and applications. It is soft, formable, exhibits excellent electrical insulating properties, and performs well at elevated temperatures up to 500F. 3. Polytetrafluoroethylene PTFE is high performance Engineering Plastics having unique properties: PTFE is chemically Inert & nonreactive to almost all known chemicals. Strengthening agent quality percentage adopts 15% and 15% respectively. PTFE material also shows good thermal properties without obvious degradation below 440 C. 260 to 270 C 500 to 510 F. Thermal Conductivity 0.24 - 0.35 W/m-K 1.67 - 2.43 BTU-in/hr-ft-F Melting Point 330 C 626 F Maximum Service Temperature, Air 260 - 290 C 500 - 554 F Deflection Temperature at 0.46 MPa (66 psi) 73 C 163 F Deflection Temperature at 1.8 MPa (264 psi) 45 - 100 C 113 - 212 F Minimum Service Temperature, Air -200 C -328 F This polymer has unique performance properties. Specific Gravity. Issue Section: Description. Prices of PTFE are stable, worldwide. The melting point of PTFE is 327 degrees Celsius, higher than other general polymer. However, its relative cost is one of the major considerations in its selection, since it is quite expensive. Annual consumption of . PTFE mechanical properties are low compared to other engineering plastics, but its integrity is . With its high thermal dimensional stability, low flammability, outstanding chemical resistance, and excellent mechanical properties over a wide temperature range, PEK is often used for demanding applications in a variety of markets. It is produced in a free-radical addition polymerisation reaction between tetrafluoroethylene (TFE) monomers. The thermal expansion coefficient of a large number of PTFE fillers is significantly smaller than that of the PTFE. It also results in increased hardness and a major increase in thermal conductivity. Thermal Properties. Our controlled processes enable us to manufacture a unique porous PTFE membrane with unmatched properties. Other trade names for PTFE include Fluorosint, Interplast, Rulon, and Semitron ESD. PTFE (Teflon) has excellent thermal and electrical insulation properties used for mechanical, electrical, chemical, and anti-friction applications . Improvement of the mechanical and thermal properties of polyester nonwoven fabrics by PTFE coating. Thermal percolation predictions compare well with experimental data; they also reveal that 10% (by volume) graphite lubricant in the carbon fiber-reinforced PTFE/PEEK composite leads to formation of effective thermal conductive networks, which rapidly increases thermal percolation due to their high efficiency of thermal transport. Recognized as mechanically stronger than other fluoropolymers (i.e., PTFE) Meets standards for food processing applications (non-toxic and resistant to bacteria and fungi) Table 1 summarizes some of the typical mechanical, electrical, and thermal properties of this polymer. It is also attacked by air degradation and radiation, which begins at a dose of 0.02 Mrad. ASTM D4745. Impact properties -PTFE possesses very high resilience characteristics . Thermal Properties of Plastic Materials Material Formula Coefficient of thermal expansion x10-6 K-1 Heat-deflection temperature - 0.45MPa C Heat-deflection . It has outstanding thermal, electrical and chemical resistance, and can be used both at very high (up to 530 K) and extremely low temperatures. The general properties of PFA are typical of other semi-crystalline high performance thermoplastics: excellent clarity and flexibility high continuous operating temperature at a maximum service temperature of 260C, PFA can handle temperatures quite well combines the best attributes of PTFE and FEP inert Temperature Range for PTFE is 100 0 C to 230 0 C and for PEEK is 100 0 C to 260 0 C. Elongation. It resists ignition and does not promote the spread of flames. The Technical Data Sheet of PTFE & Filled PTFE exhibits mechanical, thermal, electrical and chemical properties of PTFE and Filled PTFE. The results show that the thermal conductivity of the composites increase significantly, while the coefficient of thermal expansion (CTE) decrease gradually, with the hBN content increasing.. Fatemeh ASHRAFI,, Mohammad Reza BABAEI LAVASANI, Department of Textile Engineering, Amirkabir University of Technology (Polytechnic Tehran), Tehran, Iran. Excellent thermal stability. 1. Annual consumption of PTFE in India is around 5,000 tons and expected to grow @ 10% p. a. In addition to possessing the basic properties of PTFE, ePTFE products offer a number of beneficial properties. It can also be machined or molded . 2 g/cm3.Enhancement for commercially available with aramid fiber, fiber diameter of 10 ~ 12 mu m, length is about 100 microns, the density of 1.45 g/cm3. PTFE can be used as low as - 436 F (-260 C ). PTFE (polytetrefluoroethylene) is a low friction fluoropolymer with outstanding chemical and weathering resistance. The basic properties of PTFE which make it an interesting material with high commercial value are: Exception chemical resistance Good resistance to heat and low temperature Good electrical insulating power in hot and wet environments Good resistance to light, UV and weathering Low coefficient of friction Low dielectric constant/dissipation factor PTFE is a synthetic, semi-crystalline polymer made up of a carbon backbone surrounded by fluorine atoms. PCTFE shows high compressive strength and low deformation under load. . The chemical reaction is different between PVDF and PTFE. Some outstanding characteristics of PTFE include: Thermal expansions of neat PTFE and neat PEEK, the PTFE/PEEK polymer matrix, and the CF/Gr/PTFE/PEEK composite were obtained with a thermal-mechanical analyzer (TMA) in a dilatometric mode. Bulk Density. PTFE has Excellent Thermal Resistance upto 260C PTFE is Non-adhesive, not bondable & has Anti Stick Properties PTFE is material with Exceptionally low coefficient of friction Heat Deflection Temperature At 1.82 MPa (264 psi) 66 to 70 C 150 to 160 F. China, Russia and India being major producers of PTFE. For more specific values, follow the links immediately below. Strength At these exposure levels, PTFE will lose 50% of its tensile strength. It has the lowest strength and lowest ductility compared to the other variants of PTFE. It is the most chemically resistant plastic available and only a few chemicals react with it. A full bar means this is the highest value in the relevant set. K ASTM D696 Specific Heat Capacity 1.0-1.1 kJ/kg*K ASTM E1269 Lower Glass Transition Temperature -15 to -20 C Various Upper Glass Transition Temperature 40 to 50 C Various Peak Melting Temperature 190 to 210 C ASTM E1269 Relative Thermal Index - Electrical Strength . PTFE can be modified for use as a gasketing material with strong chemical resistance properties. The melting temperature of PTFE is 327 o C and ETFE 267 o C, but both of these materials begin to soften below at lower temperatures. Teflon has a uniquely high bulk density. [19] At 7 x 10 4 it loses nearly all of its elongation, flex and impact properties. . 1-3 However, pure PTFE has a low thermal . The smaller the aperture of the PVDF membrane is, the firmer the . 3. PTFE Flexibility -PTFE is quite flexible and does not break when subjected to stresses of 0,7 N/mm2 according to ASTM D 790. Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. thermal properties of virgin PTFE are then considered independent of temperature between ambient temperature and the melting point (see Figg. TYPICAL PROPERTIES of PTFE ASTM or UL test Property PTFE unfilled PTFE 25% glass filled PTFE 25% carbon filled PHYSICAL D792 Density lb/in g/cm 0,078 2,16 0,081 2,25 0,075 2,08 D570 Water Absorption, 24 hrs % < 0,01 0,02 0,05 MECHANICAL D638 Tensile Strength psi 3,900 2,100 1,900 D638 Tensile Modulus psi 80,000 - - Polyetherketone (PEK) is a ketone-based, semi-crystalline, high-performance engineering thermoplastic. Properties and Sealing Applications of PTFE PTFE can tolerate extreme temperatures, from -200 o C to 260 o C, with a melting point as high as 327 o C. Additionally, it has a very low coefficient of friction, reducing potential frictional heating in dynamic applications. Polytetrafluoroethylene PTFE 100-160 120 54 -260 1000 0.25 @23C 180-260 Polytetrafluoroethylene filled with Glass PTFE 25% GF 75-100 - - - - 0.33-0.42 @23C Teflon - a polytetrafluoroethylene (PTFE) - has outstanding dielectric properties that remain stable with frequency and temperature. ePTFE offers: Controlled variable porosity Withstands extreme temperatures Hydrophobic Chemically inert Biocompatible Low coefficient of friction: PTFE has the lowest coefficient of friction among all solid materials, and its range is about 0.05~0.2, depending on the surface pressure, sliding speed and what coating is used. Received: 16.09.2018 Accepted/Published Online: 25.02.2019 Final Version: 11.06.2019 Expanded polytetrafluoroethylene (PTFE) is an exemplary biomaterial. 2-3, by kind permission of the authors of. PTFE vs PVDF. Hardness. It is also known by the common trade name TEFLON, trademark owned by The Chemours Company FC. The effect of crystallinity on thermal conductivity was investigated and different methods of crystallinity determination were compared. Annual worldwide consumption of PTFE is around 1,50,000 tons and expected to grow @ 5% p. a. PTFE/glass fiber fabric used for conveyor belts in food processing. PTFE mechanical properties can be enhanced by adding fillers. It is a highly flexible, lubricious, chemically inert, hydrophobic plastic for critical applications. Filler. As such, the materials operating temperature is lower. ASTM D4745. Characteristics include: Excellent thermal and electrical insulation properties Low coefficient of friction The combination of these two sets of properties makes possible a vast number of applications for medical devices containing ePTFE. Flexural modulus is about 350 to 650 N/mm2 at room temperature, about 2000 N/mm2 at -80C, about 200 N/mm2 at 100C and about 45 N/mm2 at 260C. 1. Thermal Properties There are also notable differences in the thermal properties of each material. PTFE mechanical properties are low compared to other advanced engineering plastics, but its properties remain useful over a temperature range of -400 F to 400 F forming its broad operating range suitable for many applications.