AvCarb P50 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 P50 substrates are highly durable, both chemically and mechanically.

AvCarb P50 is the base substrate used in GDS1120 gas diffusion layer.

AvCarb Carbon Papers Properties Sheet

AvCarb Carbon Paper Properties
Material Type	Carbon Paper Substrate
Nominal Thickness (@ 1psi / 0.7 N/cm²)	.170 mm (170 microns)
Nominal Thickness (@ 7.3psi / 5.1 N/cm²)	.150 mm (150 microns)
Nominal Basis Weight	50 g/m3
Break Strength machine direction	5.0 MPa
Break Strength cross machine direction	3.0 MPa
Stiffness machine direction	7.5 Taber
Stiffness cross machine direction	3.0 Taber
Bulk Density (@ 0.69 N/cm3 / 1psi)	0.31 g/cm3
Air Permeability (Gurley) through-plane	35 sec/100cc
Air Permeability (Gurley) in-plane	295 sec/100cc
Compressibility ((22N - 113N)/22 x 100%)	11.5%
Through-Plane Resistivity	6.7 mOhm*cm²
Substrate PTFE Treatment	None
Microporous Layer (MPL)	None