AvCarb P75 Gas Diffusion substrates are unparalleled in their ability to meet the rigorous demands of the fuel cell, including platinum catalyst and functional layer support, effective transport of gases and liquids, and conduction of heat and electricity. Moreover AvCarb P75 substrates are highly durable, both chemically and mechanically.
AvCarb P75 is the base substrate used in the gas diffusion layers: GDS2230, GDS2240, GDS22100, and GDS2120.
| AvCarb Carbon Paper Properties | |
| Material Type | Carbon Paper Substrate |
| Nominal Thickness (@ 1psi / 0.7 N/cm²) | .245 mm (245 microns) |
| Nominal Thickness (@ 7.3psi / 5.1 N/cm²) | .205 mm (205 microns) |
| Nominal Basis Weight | 75 g/m3 |
| Break Strength machine direction | 6.5 MPa |
| Break Strength cross machine direction | 3.9 MPa |
| Stiffness machine direction | 20.0 Taber |
| Stiffness cross machine direction | 3.5 Taber |
| Bulk Density (@ 0.69 N/cm3 / 1psi) | 0.29 g/cm3 |
| Air Permeability (Gurley) through-plane | 15 sec/100cc |
| Air Permeability (Gurley) in-plane | 83 sec/100cc |
| Compressibility ((22N - 113N)/22 x 100%) | 10.7% |
| Through-Plane Resistivity | 7.8 mOhm*cm² |
| Substrate PTFE Treatment | None |
| Microporous Layer (MPL) | None |
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