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Specifications

Property Comparison of Various Fluoroplastics
Property ASTM test condition TFE PFA FEP ETFE PVdf CTFE
Physical Properties
Specific gravity D792 2.13 - 2.22 2.12 - 2.17 2.12 - 2.17 1.70 - 1.76 1.76 - 1.78 2.10 - 2.18
Water absorption D570 / 24 hrs 1/3"t < 0.00 < 0.01 < 0.01 < 0.1 < 0.04 < 0.00
Mold shrinkage 0.02 - 0.05 0.02 - 0.05 0.03 - 0.06 0.03 - 0.04 0.014 0.015 - 0.020
Contact Angle Angle to level 110 115 114 96 82 84
Thermal Properties
Thermal Conductivity(cal/sec/cm2, oC/cm2) C117 6 x 10-4 6 x 10-4 5.7 x 10-4 3.0 x 10-4 4.7-5 x 3x10-4
Coefficient of linear thermal expansion (1/ oC) D696 / 23-60oC 10 x 10-5 12 x 10-5 8.3-10 x 10-5 5-9 x 10-5 4.2 x 10-5 4.5-7.0 x 10-5
Melting point (oC) 327 302 - 310 270 260 173 - 175 210 - 212
Melt viscosity (poise) 1011 - 1013(340-380oC) 104 - 105(380oC) 4x104 - 105(300-330oC) 104 - 105(300-330oC) 2x103 - 105(210-270oC) 107(23oC)
Maximum tep. for continuous temp (oC/oF) 260 / 500 260 / 500 200 / 392 150 / 302 150 / 302 120 / 248
Mechanical Properties
Tensile strength(kgf/cm2) D792 140 - 350 280 - 315 190 - 220 410 - 470 4000 - 600 320 - 420
Elongation (%) D638/23oC 200 - 400 280 - 300 250 - 330 420 - 440 420 - 450 200 - 250
Compression strength (kgf/cm2) D638/23oC 50 - 60 50 - 60 50 - 60 109 128 - 140 90 - 120
Tensile modulus (kgf/cm2) D695/1% deformation,25oC 4,000 3,500 5,000-8,000 8,000-20,000 10,500-21,000
Flexural modulus (kgf/cm2) D790/23oC 5,000 - 6,000 6,600 - 7,000 5,000 - 6,500 9,000 - 14,000 14,000 -18,000 13,000 -18,000
Impact strength(tt-lb/in) D256/23oC, Izod 3.0 No breakdown No breakdown 20.7 2.5-2.7
Hardness (Shore) Durometer D50 - D65 D60 D55 D75 D75-D85 D90
Deformation under load (%) D621/125oC 70kgf/cm2, 24hrs. 5.0 2.4 5.0 5.4 2.4 2.6
D621/125oC 140kgf/cm2,24hrs. 7.0 2.7 3.0 2.3 0.7 0.2
Static triction coefficient Coated-steel surface 0.02 0.05 0.05 0.06 0.4 0.08
Electrical Properties
Dielectric constant D150 / 103 Hz D150 / 103 Hz 2.13 - 2.22 2.12 - 2.17 2.12 - 2.17 1.70 - 1.76 1.76 - 1.78 2.10 - 2.18
Dielectric disslpation factor D150 / 103 Hz D150 / 103 Hz < 0.00 < 0.01 < 0.01 < 0.1 < 0.04 < 0.00
Dielectric breakdown strength (V / mil) D150 / 106 Hz 1/8 in 0.02 - 0.05 0.02 - 0.05 0.03 - 0.06 0.03 - 0.04 0.014 0.015 - 0.020
Volume resistivity(ohm-cm) D257 110 115 114 96 82 84
Flexural modulus (kgf/cm2) D790/23oC 5,000 - 6,000 6,600 - 7,000 5,000 - 6,500 9,000 - 14,000 14,000 -18,000 13,000 -18,000
Chemical resistance Excellent Excellent Excellent Excellent good Excellent
Weatherability Excellent Excellent Excellent Excellent Excellent Excellent
Combustibility (%) D2863-Oxygen Concentration index < 95 < 95 < 95 31 43 < 95
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