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Autai . China. PTFE
and Teflon
PTFE & Teflon Properties
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PTFE & Teflon Properties
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 PTFE Properties
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PTFE Properties
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ATM
Method
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Units
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Virgin PTFE
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Reprocessed
PTFE
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25% Glass
PTFE
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Specific Gravity
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D792
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2.14-2.20
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2.15-2.20
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220-230
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Tensile Strength
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D638
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PSI
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1500-3500
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1500-2400
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2000-3000
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Tensile Strength
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D638
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PSI
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1500-3500
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1500-2400
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2000-3000
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Elongation
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D638
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%
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250-350
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75-200
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100-260
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Hardness
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D1700
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Durometer "D"
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50-60
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N/A |
55-65
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Deformation %
73 0 F, 1500 psi, 24 hours
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D621
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N/A |
4-8
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N/A |
1.73
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Deformation %
100 0 F, 1500 psi, 24 hours
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D621
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N/A |
10-18
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N/A |
1.91
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Deformation %
200 0 F, 1500 psi, 24 hours
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D621
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N/A |
20-25
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N/A |
4.57
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Impact Strength,
Izod
730 0 F Average
170 0 F Average
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D256
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Ft./Lb./In.
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3.00
6.00
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N/A |
2.54
3.69
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Water Absorption
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D570
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%
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0.001
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N/A |
0.013
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Coefficient of Friction
(Static) 73 0 F
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*3
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N/A |
0.04
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N/A |
0.085
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Dielectric Constant
(100 CPS)
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D150
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N/A |
2.00
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2.26
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2.4
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Dielectric Strength (4) (air)
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D257
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Volts
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1000
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450
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235
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Coefficient of Thermal Expansion 73 0 F
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D696
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In./In./Ft.
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5.5 x 10.3
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N/A |
2.75 x 10.3
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Coefficient of Thermal Conductivity
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*5
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Btu/hr/ftz
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1.7
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N/A |
3.12
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PV at 900 ft./min
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N/A
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N/A |
2500
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N/A |
15,000
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Color
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*6
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N/A |
white
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off white
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brownish white
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♦ PTFE and Teflon History
Polytetrafluoroethylene (PTFE) resin is in a class of paraffinic polymers that have some or all of the hydrogen replaced by fluoride. The original PTFE resin was first discovered on April 6, 1938 by Dr Roy J. Plunkett. While working at DuPont's Jackson Laboratory in New Jersey on another project, Dr. Plunkett found that a frozen, compressed amount of tetrafluoroethylene gas had polymerized into a waxy white solid substance, forming polytetrafluoroethylene (PTFE). DuPont registered the original PTFE resin under the trademark Teflon® in 1945, and the first commercial products were sold under this trademark in 1946. Interestingly, PTFE was produced on a limited scale in the early 1940s, and was used shortly thereafter by the Manhattan Project in containers for highly corrosive elements during uranium separation experiments.
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♦ PTFE Characteristics & Benefits
The extraordinary characteristics of PTFE make it the ideal choice in a wide range of products and applications. PTFE has a coefficient of friction that is one of the lowest of any material. PTFE is extremely abrasion resistant, making it adaptable to the harshest environments. In addition, PTFE can withstand a wide range of temperatures, from 260 Degrees Centigrade down to -270 Degrees Centigrade, and can even handle brief exposures at higher temperatures. PTFE also has excellent flame resistance due to its extremely high melting point, along with a very low rate of smoke generation and heat release. Another advantage of PTFE is that it is chemically inert and pure, and has no additional stabilizers, lubricants or plasticizers that would taint process fluids.
PTFE products have an extremely long service life, primarily due to PTFE retaining its original properties over a long period of time, even at extreme temperatures, in ultraviolet (UV) light, and when exposed to oils, oxidizing agents and solvents. PTFE also is extremely corrosion resistant, especially to acids, and harsh inorganic and organic chemicals. Additionally, the original properties PTFE remain the same even after extended time periods in water. Furthermore, PTFE is resistant to atmospheric aging in the form of discoloration, oxidation, and, as previously noted, is not affected by ultraviolet light
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