Friction material for applying friction in liquid medium, and associated device and method

A manufacturing procedure of a friction material including the following consecutive stages a) to d):

• a) supplying a mat of fibres carded, glazed and felted, the length of the fibres of which is equal to or in excess of 12 mm;
• b) impregnating the mat in a heat-hardening resin bath;
• c) drying the excess resin;
• d) consolidating under charge the intermediary material obtained after stage c) at a temperature between 120° C. and 250° C. in order to obtain a porosity between 30% and 60% in volume of the final material;
• and a stage:
• e) introducing charges of active carbon with specific surface between 500 sq·m·/gr and 2500 sq·m·/gr at a mass content in the friction material equal to or in excess of 5% in weight and equal to or below 15% in weight during stage b) and/or after stage c) and before stage d).