właściwości
| norma / jednostka | PTFE | MECHANICAL PROPERTIES | | Specific Gravity | D792 | 2.18 | | Elongation % | D638 | 200~450 | | Tensile Strength (psi) | D638 | 2,000~7,000 | | Flexural Strength (psi) | D790 | no break | | Compressive Strength | D695 | 3,500 | Tensile Elastic Modulus
(Young's Modulus) (psi) | D638 | 57,000 | (psi)
Flexural Modulus
103MPa (103kgf/cm2) | D790 | 71,000~
85,000 | | D790 | 0.5-0.6
(5.0-6.0) | FlexLife
(MIT cycles) | D2176 | >1,000,000 | Hardness Durometer
Shore D | D636 | D50~65 | | Coefficient of Friction | on steel | 0.02 | Abrasion Resistance
1000 revs. | Taber | 12 | Impact Strength IZOD
73°F/23°C, notched ft/lbs/in | D256 | 3 | THERMAL PROPERTIES | | Melting Point | °C
(°F) | 327
(621) | Upper Service
Temperature(20,000h) | °C
(°F) | 260
(500) | | Flame Rating** | UL 94 | V-0 |
Thermal Conductivity
| BTU/hr/ft2/deg F in | 1.7 | | cal/sec/cm2,ºC/cm | 6 x 10-4 | Linear Coefficient of
Thermal Expansion 10-5 °C | D696 | >11.6 | | Heat of Fusion | BTU/LB | 29-37 | | Heat of Combustion | BTU/LB | 2200 | | Low Temperature Embrittlement | °C
(°F) | -268
(-450) | | ELECTRICAL PROPERTIES | | Dielectric Constant | D150/103Hz | 2.1 | | D150/106Hz | 2.1 | Dielectric Strength
10 mil film | D149 | >1400 | | Volume Resistivity ohm-cm | D257 | >1018 | Surface Resistivity
ohm/sq. | D257 | >1017 | | GENERAL PROPERTIES | Chemical/Solvent
Resistance | D543 | Excellent | | Water Absorption, 24h | % | <0.01 | | Deformation Under Load | *D621/100°C | 5.0 | | **D621/25°C | 7.0 | | Refractive Index | | 1.35 | | Limiting Oxygen Index | >95 | >95 | | Properties | ASTM or Unit | PTFE | | *6.8 MPa (986 psi),24h
**13.7 MPa (1987 psi),24h |
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