TEFLON™ (불소수지) 물성표
| Property | ASTM test method test condition | PTFE | PFA | FEP | ETFE |
|---|---|---|---|---|---|
| Physical properties | |||||
| Specific gravity | D792 | 2.13~2.22 | 2.12~2.17 | 2.12~2.17 | 1.70~1.76 |
| Water absorption (%) |
D570/24h⅓"t | ＜ 0.00 | ＜ 0.01 | ＜ 0.01 | ＜ 0.1 |
| Mold shirinkage (㎝/㎝) |
0.02~0.05 | 0.04 | 0.03~0.06 | 0.03~0.04 | |
| Contact angle (degree) |
Angle to level | 110 | 115 | 114 | 96 |
| Thermal properties | |||||
| Thermal conductivity (cal/sec/㎠, ℃/㎝) |
C117 | 6×10-4 | - | 6×10-4 | 5.7×10-4 |
| Coefficient of linear thermal expansion (1/℃) |
D696/23~60℃ | 10×10-5 | 12×10-5 | 8.3~10.5×10-5 | 5~9×10-5 |
| Melting point (℃) |
327 | 302~310 | 270 | 260 | |
| Melting point (℉) |
620.6 | 565.6~590 | 518 | 500 | |
| Melt viscosity (poise) |
1011~1013 (340~380℃) |
104~105 (380℃) |
4×104~105 (300~330℃) |
104~105 (300~330℃) |
|
| Max. temp. for continuous use (℃/℉) |
280/500 | 260/500 | 200/392 | 150/302 | |
| Mechnical properties | |||||
| Tensile strength MPa (psi) |
D638/23℃ | 13.7~34.3 (1987~4975) | 27.4~30.9 (3794~4482) | 18.6~21.6 (2698~3133) | 40.2~46.1 (5831~6686) |
| Elongation (%) |
D638/23℃ | 200~400 | 280~300 | 250~330 | 420~440 |
| Compression strength MPa (psi) |
D695/1% deformation, 25℃ | 4.9~5.9 (711~856) | 4.9~5.9 (711~856) | 4.9~5.9 (711~856) | 10.7 (1552) |
| Tensile modulus MPa (psi) |
D638/23℃ | 392.2 (56884) | - | 343.2 (49777) | 490.3~784.5 (71112~113782) |
| Flexural modulus MPa (psi) |
D790/23℃ | 490.3~588.4 (71112~85340) | 647.2~686.5 (93869~99569) | 539.4~637.4 (78233~92447) | 882.6~1372.9 (128011~199123) |
| Impact strength (ft-lb/in) |
D256/23℃, lzod | 3.0 | - | No breakdown | No breakdown |
| Hardness (Shore) |
Durometer | D50~D65 | D60 | D55 | D75 |
| Deformation under load (%) |
D621/100℃ 6.8MPa(986 psi), 24h | 5.0 | 2.4 | 5.0 | 5.4 |
| D621/25℃ 13.7MPa(1987 psi), 24h | 7.0 | 2.7 | 3.0 | 2.3 | |
| Static frictin coefficient | Coated-steel surface | 0.02 | 0.05 | 0.05 | 0.06 |
| Electrical properties | |||||
| Dielectric constant | D150/103㎐ | 2.1 | 2.1 | 2.1 | 2.6 |
| D150/106㎐ | 2.1 | 2.1 | 2.1 | 2.6 | |
| Dielectric dissipaton factor | D150/103㎐ | ＜ 1×10-5 | ＜ 1×10-5 | 6×10-5 | 8×10-4 |
| D150/106㎐ | 2×10-5 | 3×10-4 | 5×10-4 | 5×10-3 | |
| Dielectric breakdown Strength (V/mill) |
D149/Short time, 1/8in | 480 | 500 | 500~600 | 400 |
| Volume resistvity (Ω-㎝) |
D257 | ＜ 1018 | ＜ 1018 | ＜ 1018 | ＜ 1016 |
| Chemical resistance | Excellent | Excellent | Excellent | Excellent | |
| Weatherability | Excellent | Excellent | Excellent | Excellent | |
| Combustibility (%) |
D2863/Oxygen concentration index | ＜ 95 | ＜ 95 | ＜ 95 | 31 |
| Property | ASTM test method test condition | PTFE | PFA | FEP | ETFE |