Technical Data Sheet
Graphited PTFE & Aramid Combination Packing
PTFE Braided Packing
Polytetra Processors
Rakhial, Ahmedabad, Gujarat, India
www.automatasia.com
Graphite bonded PTFE yarn with aramid corners giving good sliding properties and thermal conductivity while preventing gap extrusion. Service: -200 to +260°C, 100 kg/cm², 8 m/sec.
Specification
| Sizes | Square sections and coil lengths to application |
|---|---|
| Tolerances | Braid section and density to agreed specification |
| Grades | Virgin PTFE, Graphite-filled PTFE, Aramid-reinforced PTFE, Lubricated PTFE |
| Standards | ASTM D4894, ASTM D4745 |
| Typical uses | High pressure pumps, High temperature service |
| Industries | Petrochemical, Power, Steel |
Typical properties — virgin PTFE
| Property | Typical value | Test method |
|---|---|---|
| Specific gravity | 2.14 – 2.20 | ASTM D792 |
| Tensile strength | 20 – 35 MPa | ASTM D638 / D4894 |
| Elongation at break | 200 – 400 % | ASTM D638 / D4894 |
| Hardness | Shore D 50 – 65 | ASTM D2240 |
| Coefficient of friction (dynamic) | 0.04 – 0.10 | ASTM D1894 |
| Continuous service temperature | −200 °C to +260 °C | — |
| Melting point | ≈ 327 °C | ASTM D4894 |
| Dielectric strength | ≈ 32 kV/mm (short time, thin section) | ASTM D149 |
| Water absorption | < 0.01 % | ASTM D570 |
Typical values for guidance only, not guaranteed minimums. Filled grades, linings and finished parts differ; confirm limits for your application. Issued 2026.