Full Name
Polytetrafluoroethylene (PTFE)

Polytetrafluoroethylene, commonly known as PTFE, is a type of fluoropolymer that's well-regarded for its exceptional properties, including its resistance to heat, chemicals, and electrical conductivity. These unique characteristics make PTFE a highly valuable material in various industries, including telecommunications.

PTFE in Telecommunications

PTFE finds extensive use in coaxial cables as a dielectric material that separates the inner conductor from the outer conductor. A dielectric is essentially an insulator — it is resistant to the flow of electric charge and serves to maintain the separation of conductors to prevent the current's direct flow from one to the other.

PTFE's high dielectric strength and low dielectric constant make it an outstanding choice for this purpose. The dielectric strength refers to the maximum electric field that a pure material can withstand under ideal conditions without breaking down (i.e., without experiencing failure of its insulating properties). The low dielectric constant of PTFE ensures minimal signal distortion and power loss, as it reduces the amount of electromagnetic energy stored in the dielectric material.

Moreover, PTFE's excellent thermal stability and resistance to virtually all types of chemicals ensure that the dielectric performance is maintained even under harsh environmental conditions and temperature extremes. This is particularly important in telecommunications, where equipment reliability is crucial and operational environments can often be quite challenging.

It is worth noting that despite its superior properties, PTFE is typically more expensive compared to other dielectric materials. Therefore, it is often used in applications where its high-performance characteristics are required to meet the demands of specific high-frequency, high-temperature, or harsh-environment applications.

2.16 g/cc
Dielectric Strength
18.0 kV/mm
Specific Heat Capacity
1.20 J/g-°C
Max. Service Temperature, Air
260 °C
Tensile Strength, Ultimate
36.5 MPa
Elongation at Break
400 %
Dielectric Constant
Arc Resistance
300 s
CTE, linear
112 µm/m-°C
Thermal Conductivity
0.250 W/m-K
Flammability, UL94