The chemical resistance of polymers with high fluorine content is exceptionally high. The electrical insulating and dielectric properties of these materials are also very good.
Fluorine-polymers are resistant against nearly all known chemical compounds.
Fluorine-polymer has a smooth surface of extremely low surface tension which is why virtually nothing adheres to this material.
Fluorine-polymer is moisture rejecting, doesn’t swell and is not be damaged by welding.
Fluorine-polymer is used, where conventional material wouldn’t resist the environmental conditions.
Fluorine-polymer is applied in the civil and military sector as well as in the aviation- and aerospace technology.
Fluorine-carbon-resins have following important characteristics:
- high heat-resistance during permanent operation
- HELUFLON®-FEP up to 250°C
- HELUFLON®-PTFE up to 260°C
- outstanding resistant against dielectric strength
- constant dielectric characteristics
- no moisture absorption
- resistant against nearly all chemical products
- insensitive temperature fluctuations
- good mechanical characteristics, no formation of cracks, wear-resistant
- low coefficient of friction
- light resistant (also UV)
Characteristics:
Insulation Material
ETFE
FEP
PTFE
PFA
Material Initial Code
7Y
6Y
5Y
51Y
Nominal Temperature in °C (permanent - approx. 25000h)
- 100
+ 150
- 100
+ 205
- 190
+ 260
- 190
+ 260
Nominal Temperature in °C (temporary)
+ 180
+ 230
+ 300
+ 280
Break-down Temperature, Melting Point (°C)
+ 270
+ 290
+ 327
+ 310
Dielectric Number at 60 Hz (20°C)
2.6
2.1
2.0
2.1
Density 10³ kg/m³ (20°C)
1.70
2.15
2.18
2.20
Specific Resistance Ohm x cm (20°C)
1016
1018
1018
1016
Break-down Resistance kV/mm (20°C)
36
25
20
25
Tension MPa (20°C)
45
20 - 25
35 - 45
30
Breaking Point % (20°C)
150 - 300
250 - 300
350 - 400
300
Porosity % (20°C)
0.02
0.01
0.01
0.01
Environmental Resistance
very good
very good
very good
very good
Flammability
not flammable
not flammable
not flammable
not flammable
Resistance to Chemicals
very good
very good
very good
very good
Radiation Resistance 1) x 104 GY
200
0.02
0.02
0.02
1) Values shown include high dosage and ca. 50% rest smoldering values
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