Manufacturer has renamed Sigracet 29 AA to Sigracet 22 AA. Specifications are unchanged.

Sigracet 22 AA is a non-woven carbon paper gas diffusion media that has no PTFE treatment. It has a total thickness of 180 μm (microns). SGL AA is a great low-cost alternative to conventional woven carbon paper Gas Diffusion Layer (GDL) and Gas Diffusion Media materials.

The Sigracet Carbon Fiber Paper 22 Series is intended to combine the required production robustness and the excellent performance properties. Stack developers and assemblers are benefiting from the following greatly improved characteristics:

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

Sigracet 29 AA Carbon Paper Property Sheet

Sigracet 20 and 30 Series Carbon Paper Property Sheet

Sigracet Carbon Fiber GDL White Paper

Sigracet GDS 2D Recommended Applications

Sigracet GDL Handling Instructions

Sigracet AB, BA, BC+ Series GDL MSDS

Gas Diffusion Layer Properties
X-Material Type	Carbon Fiber Paper
Thickness	180 microns +/- 20 microns
X-Basic Weight (g/m²)	32 +/- 7 g/m²
Porosity (%)	80%
Compressibility	ca. 34% (at 1 MPa)
Electrical Resistivity (through plane)	< 5 mΩcm² (milliohms cm²)
IP Pressure Drop	< 0.4 bar (at 1 MPa)
Substrate PTFE Treatment	No PTFE Treatment Applied
Microporous Layer	No Microporous Layer Applied