(WO9900340-A1)      Flexible graphite sheet, having decreased electrical resistivity through the thickness and improved sealability perpendicular to the thickness, is made by: (i) forming a mixture of a coarser natural graphite flake sized at at least 80 wt.% 20x50 mesh and 25-75 wt.% of finer natural graphite having at least 80 wt.% at 50x80 mesh; (ii) treating the blend with an intercalating solution; (iii) heating the blend to exfoliate the flake into a mixture of larger and smaller, expanded vermicular particles; and (iv) passing the blend through pressure rolls to form a sheet of predetermined thickness such that the resistivity through the thickness decreases with increasing amounts of the finer component.    ADVANTAGE -   The anisotropy with respect to electrical resistivity is reduced by the addition of the finer component, whilst a coarser component is necessary to maintain adequate strength.    (EP994828-A1)      Flexible graphite sheet, having decreased electrical resistivity through the thickness and improved sealability perpendicular to the thickness, is made by: (i) forming a mixture of a coarser natural graphite flake sized at at least 80 wt.% 20x50 mesh and 25-75 wt.% of finer natural graphite having at least 80 wt.% at 50x80 mesh; (ii) treating the blend with an intercalating solution; (iii) heating the blend to exfoliate the flake into a mixture of larger and smaller, expanded vermicular particles; and (iv) passing the blend through pressure rolls to form a sheet of predetermined thickness such that the resistivity through the thickness decreases with increasing amounts of the finer component.    ADVANTAGE -   The anisotropy with respect to electrical resistivity is reduced by the addition of the finer component, whilst a coarser component is necessary to maintain adequate strength.    (CN1268102-A)      Flexible graphite sheet, having decreased electrical resistivity through the thickness and improved sealability perpendicular to the thickness, is made by: (i) forming a mixture of a coarser natural graphite flake sized at at least 80 wt.% 20x50 mesh and 25-75 wt.% of finer natural graphite having at least 80 wt.% at 50x80 mesh; (ii) treating the blend with an intercalating solution; (iii) heating the blend to exfoliate the flake into a mixture of larger and smaller, expanded vermicular particles; and (iv) passing the blend through pressure rolls to form a sheet of predetermined thickness such that the resistivity through the thickness decreases with increasing amounts of the finer component.    ADVANTAGE -   The anisotropy with respect to electrical resistivity is reduced by the addition of the finer component, whilst a coarser component is necessary to maintain adequate strength.    (KR2001014058-A)      Flexible graphite sheet, having decreased electrical resistivity through the thickness and improved sealability perpendicular to the thickness, is made by: (i) forming a mixture of a coarser natural graphite flake sized at at least 80 wt.% 20x50 mesh and 25-75 wt.% of finer natural graphite having at least 80 wt.% at 50x80 mesh; (ii) treating the blend with an intercalating solution; (iii) heating the blend to exfoliate the flake into a mixture of larger and smaller, expanded vermicular particles; and (iv) passing the blend through pressure rolls to form a sheet of predetermined thickness such that the resistivity through the thickness decreases with increasing amounts of the finer component.    ADVANTAGE -   The anisotropy with respect to electrical resistivity is reduced by the addition of the finer component, whilst a coarser component is necessary to maintain adequate strength.