Teflon (PTFE)

teflon-500x500
PROPERTIES UNIT ASTM TEST METHOD PTFE
PHYSICAL Melting Point °C 327
specific Gravity D792 2.14-2.20
MECHANICAL Tensile Strength Mpa { kgf/cm² } D638 13.7-34.3 {140-350}
 Elongation % D638 200-400
Compresive Strength Mpa { kgf/cm² } D695 11.8 {120}
Impact Strength (Aizot) J/m { kgf°cm/cm} D526A 160 { 16.3}
Hardness (Rockwell) D785
Hardness (Shore) D2240 D50-55
Bending elascity GPA { 10³kgf/cm²} D790 0.55 {5.6}
Tensile Strength GPA { 10³kgf/cm²} D638 0.40-0.55 {4.1-5.6}
Coeffcient of Dynamic friction 0.69MPa {7kgf/cm³} 0.10
3m/min
THERMAL Thermalconductivity W/(m°K) C177 0.25
{Kcal/(m·hr·°C)} {0.22}
Specific Heat J/(°C·g)  {cal/(°C·g) 1.05 {0.25}
Coeffcient of Linear expansion 10¯⁵/°C D696 10
Ball Pressure °C 180
Max.Service Temperature °C Unloaded 260
Temperature thermal deformation ratio
1.81 Mpa{18.5kgf/cm²} °C 121
0.45 Mpa{4.6kgf/cm²} °C 121
ELECTRICAL Volumetric resistance ratio °cm D257 (50%.RH.235) >10¹⁸
Dielectric breakdown strength (Short term) MV/m D149 19
Kv/MM (3.2mm thickness
Dielectric constant
60Hz pF/m D150 <18.6 {<2.1}
10³Hz pF/m D150 <18.6 {<2.1}
10⁶Hz pF/m D150 <18.6 {<2.1}
Anti arcing property sec D495 >300
Dielectric dissipation factor
60Hz D150 <0.0002
10³Hz D150 <0.0002
10⁶Hz D150 <0.0002
DURABILITY Water absorption (24h) % D570 0.00
3.2mm thickness combustibility (UL/94) V-0
Oxygen index D2863 >95
Effect of direct sunlight NO
Effect of weak acid D543 NO
Effect of strong acid D543 NO
Effect of weak alkali D543 NO
Effect of strong alkali D543 NO
Effect of solvent alkali NO