(US6042968-A)      The production of an imbibed polybenzimidazole (PBI) fabric comprises: (i) providing a fabric comprising PBI fillers with voids between the fibres; and (ii) soaking the fabric in an acid solution comprising an acid and a solvent, for a time sufficient for the fabric to imbibe the acid solution, thereby swelling the fibres and closing the voids between the fibres.    Also claimed is a PBI fabric comprising an acid content of 40-95 wt.% Also claimed is a fuel cell comprising a PBI fabric comprising an acid content of 40-95 wt.%.    USE -   Used as fuel cell or battery electrodes.    ADVANTAGE -   The invention retains acid and thus electrolytic capacity for a longer time.    (EP996989-A1)      The production of an imbibed polybenzimidazole (PBI) fabric comprises: (i) providing a fabric comprising PBI fillers with voids between the fibres; and (ii) soaking the fabric in an acid solution comprising an acid and a solvent, for a time sufficient for the fabric to imbibe the acid solution, thereby swelling the fibres and closing the voids between the fibres.    Also claimed is a PBI fabric comprising an acid content of 40-95 wt.% Also claimed is a fuel cell comprising a PBI fabric comprising an acid content of 40-95 wt.%.    USE -   Used as fuel cell or battery electrodes.    ADVANTAGE -   The invention retains acid and thus electrolytic capacity for a longer time.    (CN1264501-A)      The production of an imbibed polybenzimidazole (PBI) fabric comprises: (i) providing a fabric comprising PBI fillers with voids between the fibres; and (ii) soaking the fabric in an acid solution comprising an acid and a solvent, for a time sufficient for the fabric to imbibe the acid solution, thereby swelling the fibres and closing the voids between the fibres.    Also claimed is a PBI fabric comprising an acid content of 40-95 wt.% Also claimed is a fuel cell comprising a PBI fabric comprising an acid content of 40-95 wt.%.    USE -   Used as fuel cell or battery electrodes.    ADVANTAGE -   The invention retains acid and thus electrolytic capacity for a longer time.    (TW398099-A)      The production of an imbibed polybenzimidazole (PBI) fabric comprises: (i) providing a fabric comprising PBI fillers with voids between the fibres; and (ii) soaking the fabric in an acid solution comprising an acid and a solvent, for a time sufficient for the fabric to imbibe the acid solution, thereby swelling the fibres and closing the voids between the fibres.    Also claimed is a PBI fabric comprising an acid content of 40-95 wt.% Also claimed is a fuel cell comprising a PBI fabric comprising an acid content of 40-95 wt.%.    USE -   Used as fuel cell or battery electrodes.    ADVANTAGE -   The invention retains acid and thus electrolytic capacity for a longer time.    (JP2001510879-W)      The production of an imbibed polybenzimidazole (PBI) fabric comprises: (i) providing a fabric comprising PBI fillers with voids between the fibres; and (ii) soaking the fabric in an acid solution comprising an acid and a solvent, for a time sufficient for the fabric to imbibe the acid solution, thereby swelling the fibres and closing the voids between the fibres.    Also claimed is a PBI fabric comprising an acid content of 40-95 wt.% Also claimed is a fuel cell comprising a PBI fabric comprising an acid content of 40-95 wt.%.    USE -   Used as fuel cell or battery electrodes.    ADVANTAGE -   The invention retains acid and thus electrolytic capacity for a longer time.