PTFE Teflon® Tape Manufacturer
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Applications
PTFE tape can be used either as a primary insulating material wrapped directly on the conductor or as a jacketing material to bundle cables together. It is applied as a spiral wrap and most often is subsequently sintered at high temperature. Wire wrapping with PTFE tape offers important advantages over extrusion, not the least being the investment in capital equipment, which is considerably lower while giving the same high performance cable. Wrapping also offers distinct advantages in the following areas:
- Production of short lengths of cable of a few meters only or else very long lengths;
- Manufacturing of complicated constructions, large cross sections, heavy cables and braided cables;
- Making hybrid constructions using different types of tape;
- Better control of concentricity with consistent insulation thickness along the entire cable length;
- Better
control of adhesion to conductor and strip-force
Typical applications where PTFE is the material of choice as an electrical insulation would include:
- Where speed and clarity of signal are critical
- Where hot-spots or elevated temperatures are present
- Where aggressive media is present or sustained exposure to UV light
- Where safety concerns are present, especially risk of fire.
- Where low attenuation, low dielectric constant and high velocity signal propagation are desired, such as telecommunication cable
Typical properties of PTFE tapes
| Mechanical |
|
|
|
Tensile
Strength
|
20,7
- 27,4
|
MPa
|
|
Elongation
|
300
- 450
|
%
|
| Electrical |
|
|
|
Dielectric
constant (100 Hz to 60 MHz)
|
2,2
|
|
|
Dielectric
strength (0,38 mm)
|
23,6
|
kV/mm
|
|
Power
factor (sin d - 100 Hz to 60 MHz)
|
<0,0002
|
|
|
Volume
resistivity
|
>10
|
PWm
(1)
|
| Thermal |
|
|
|
Flame
rating (2)
|
<5
|
s
|
|
Melting
point initial
|
5
|
mm
|
| Environmental and chemical effects |
|
|
|
Chemical
resistance
|
Excellent
|
|
|
Water
absorption
|
<0,01
|
%
|
|
Weathering
|
Excellent
|
|
(1) P
= Peta = 10(15)
(2) Results based on laboratory test controlled conditions. Do not reflect
performance under actual fire conditions