Description
Description
The newly improved Sigracet carbon fiber paper series gas diffusion layers are intended to combine the required production robustness and the excellent performance properties in which stack developers and assemblers are benefiting from:
? Greatly improved homogeneity inter-lot and intra-lot. ?The overall variability has been shown to be better than +/- 10% (2 sigma)
? Greatly improved surface flatness
? Greatly reduced occurrence of faulty spots on a roll
? Best performance under various operating conditions
?
Technical Data (Typical Properties)
|
Basic Film Properties |
Unit of Measure |
22BB |
28BC |
29BC |
36BB |
39BB |
|
Thickness |
mm |
0.215?? 0.020 |
0.235?? 0.025 |
0.235?? 0.025 |
0.280?? 0.020 |
0.315?? 0.020 |
|
Areal Weight |
g/m2 |
70??15 |
105??10 |
90??10 |
105??15 |
95??15 |
|
Electrical Resistivity |
m????cm2 |
< 10? |
?< 11? |
< 12 |
< 12? |
< 13 |
|
Thermal Conductivity |
W(m-1)(K-1) |
0.30 |
0.38 |
– |
0.43 |
0.20 |
|
Bending Stiffness (MD/TD) |
N mm |
1.5/0.9? |
1.7/1.2 |
– |
3.6/3.2 |
3.5/2.9 |
|
Gas Permeability |
Gurley sec |
1.2 |
4.5 |
– |
3.0 |
1.5 |
|
Compressibility |
1.0Mpa |
20% |
11% |
19% |
14%? |
27?% |
|
Water Contact Angle? |
MPL |
> 130?? |
> 130?? |
– |
> 130?? |
> 130?? |
|
Roughness |
??m |
7.2 |
6.4 |
– |
5.8 |
7.0 |
|
Impurities |
ppm |
< 10 |
< 10 |
– |
< 10 |
< 10 |
|
Tensile Strength |
MPa |
6.9/4.6? |
6.6/5.1 |
– |
8.5/8.1 |
7.7/4.9 |
|
Substrate PTFE Treatment |
5% |
5% |
5% |
5% |
5% |
|
|
Microporous Layer |
Yes, on one side |
Yes, on one side |
Yes, on one side |
Yes, on one side |
Yes, on one side |
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