PTFE (Poly Tetra Fluoro Ethylene) Properties

PTFE grade used are as per ASTM D 1457 Type III and ASTM D 4895 standard

Mechanical Value Test Method
1. Density 2.15 – 2.18 g / cm3 As per DN 53479
2. Tensile Strength 20.7 MPA As per DN 53455
3. Elongation at Break 200 to 300 % As per DN 53455
4. Hardness 50-60 Shore’D’ As per DN 53516
Thermal Value Test Method
1. Melting Point 320 – 340°C As per ISO 12086
2. Temperature Strength -200°C to 260°C
3. Coefficient of Linear Expansion 20°C – 100°C 16 x 10-5 K-1 As per DIN 53328
20°C – 200°C 19.5 x 10-5 K-1
20°C – 300°C 25 x 10-5 K-1
4. Softening Point 110°C As per DIN 53640
5. Conductivity 0.25 W / mk As per DIN 52612
6. Flammability Non Flammable
7. Sp. Heat at 0°C 0.96 kj / kg x k
8. Specific Heat at 50°C 1.05 kj / kg x k
Electrical Value Test Method
1. Dielectric Strength 40 – 80 kv / mm As per VDE 0303 part 2
(Film 0.2 mm thick)
2. Dielectric constant 2.1 As per DIN 53483
from 50 – 107 Hz
3. Volume Resistivity 1018 x cm As per DIN 53482
4. Surface Resistivity >1017 As per DIN 53482
5. Arc Resistance L4 Degree As per VDE 0303 part 5
Others Value Test Method
1. Water Absorption <0.01 % As per DIN 53495
2. Weather Resistance Excellent
3. Chemical Resistance Excellent
4. Coefficient of Permeability 2 – 8 x10-7 cm3.cm /cm.sec.bar
5. FDA Compliant Yes 21 CFR 1771550
6. UL Listed Yes File 54681 QMFZ2