EN
EN
Polytetrafluoroethylene (PTFE, Teflon, in Russian - Ftoroplast)
PTFE is a white‑colored solid at room temperature, with a density of approximately 2.2 g/cm3 and a melting point of 327 °C. Its key properties remain largely unchanged over the temperature range from ‑73 °C to 204 °C, and its refractive index stays at around 1.43 across a relatively broad spectral band.
Fig. 16 Transmission of PTFE film ~0.1 mm-thick. THz region.
Fig. 17 Transmission of PTFE film ~0.1 mm-thick. NIR&MIR region.
Owing to its high transparency in the 1‑7 μm spectral range, thin PTFE sheets are commonly used to fabricate IR polarizers. Such polarizers are less expensive than those made from crystalline materials, which enables their widespread deployment in IR polarization‑related applications.
Main Properties of PTFE：
Tensile strength | 3900psi ~26.7 Mpa |
Tensile modulus | 8000psi ~551.6 MPa |
Elongation at break (%) | 300 |
Flexural strength (psi) | No break |
Flexural modulus (psi) | 72000 |
Compressive strength (psi) | 2500 |
Compression coefficient (psi) | 70000 |