Plastics with unlimited possibilities made in germany

Properties of Fluoroplastics

Feature Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
general                  
Density ISO 1183 g/cm3 2.14 - 2.19 2.12 - 2.17 2.12 - 2.17 1.71 - 1.78 2.10 - 2.16 1.75 - 1.78 1.67 - 1.70
Upper service temperature, without load
  °C
250-260
250-260 200-205 150-180 150-180 150-170 150-180
Combustibility

    non-
combustible
non-
combustible
non-
combustible
non-
combustible
non-
combustible
non-
combustible
non-
combustible
Water absorption at 23 °C Saturation
  % <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05
thermal Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
Melting temperature ASTM 2116 °C 327
300-310
253-282
265-275
185-210
165-178
240-247
Lin. thermal expansion coefficient DIN 52612 10-5*K-1 10-16
10-16
10-14
8-12
4-8
8-18
4-8
Heat conductivity at 23°C   W/K*m 0.23
0.22
0.20
0.23
0.19
0.17
0.15
Specific heat at 23°C   kJ/kg*K 1.01
1.09
1.17
1.95
0.92 1.38
 
Oxygen index   % >95 >95 >95 30 >95 43 60
mechanical Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
Tensile strength
ISO 527
N/mm²
29-39
27-32
19-25
36-48
31-42
38-50
41-54
at 150 °C
    14-20
15-21
4-6
8-12
1-2
7.5-10.5
3.5-4.5
Elastic limit at 23 °C
ISO 527
N/mm²
10
14
12
24
40
46
34
Ultimate elongation at 23 °C
ISO 527
%
200-500
300
250-350
200-500
80-250
20-250
200-300
Tensile E-Modulus
ISO 527
N/mm²
400-800
650
350-700
500-1200
1000-1200
1800-1800
1200-1800
Limiting bending stress at 23 °C
ISO 178
N/mm²
18-20
15
  25-30
52-63
55
50
Bending E-Modulus
ISO 527
N/mm² 600-800
650-700
660-680
1000-1500 1200-1500
1200-1400
1700
Ball indentation hardness
ISO 2039
  25-30
25-30
23-29
34-40
55-70
62-68
55-65
Rockwell hardness R ISO 2039   20-30 25-35 20-30 45-55 103-118 100-115 85-95
electrical Standard
Unit PTFE PFA FEP ETFE PCTFE PVDF ECTFE
Shore hardness D
DIN 53505
  55-72
60-65
55-60
63-75
70-90
73-85
70-80
Friction coefficient

    0.05-0.2
0.2-0.3
0.3-0.35 0.3-0.5
0.3-0.4
0.2-0.4 0.65
Dielectric constant at 100Hz
IEC 60250
  <2.1
<2.1
<2.1
2.6
2.3-2.8
  2.3-2.6
at 106
    <2.1
<2.1
<2.1
2.6
2.3-2.4    
Dielectric loss factor at 100Hz
  *10-4
0.5-0.7
0.5-0.7
0.5-0.7 5-6      
Specific flow resistance
IEC 60093
Ω*cm
>1018
>1018
>1018
>1016
>1018
>1015
>1015
Surface resistance
DIN 53482
Ω
>1016
>1016
>1016
>1014
>1016
>1013
>1012
Creep resistance
IEC 60112
  KA3c
  KA3c   KA3c    
Dielectric strength IEC 60243-2 kV/mm >40 >50 >50 >40 >40 >40 >40

 

To top