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

A friction part, including a friction material for friction in liquid medium and a friction support upon which the friction material is moulded with a casting;

• the friction material including:
• a mat of fibers impregnated by a heat-hardening resin;
• fibers of the mat being carded, lapped and needled during the formation of the mat;
• the carded, lapped and needled fibers being equal to or in excess of 12 mm in length;
• and
• charges of active carbon with specific surface between 500 sq·m·/gr and 2500 sq·m·/gr and with mass content in the friction material equal to or in excess of 5% in weight and equal to or below 15% in weight;
• the friction material having porosity equal to or in excess of 30% in volume and equal to or below 60% in volume, wherein
• one side of the friction material, intended to form a friction surface, comprising between 20 and 70% in volume of active carbon over a thickness between 20 μm and 200 μm.

A device providing a friction in liquid medium, the device including a friction surface coated with a friction material including:

• a mat of fibers impregnated by a heat-hardening resin;
• fibers of the mat being carded, lapped and needled during the formation of the mat;
• the carded, lapped and needled fibers being equal to or in excess of 12 mm in length;
• and
• charges of active carbon with specific surface between 500 sq·m·/gr and 2500 sq·m·/gr and with mass content in the friction material equal to or in excess of 5% in weight and equal to or below 15% in weight;
• the friction material having porosity equal to or in excess of 30% in volume and equal to or below 60% in volume, wherein
• one side of the friction material, intended to form a friction surface, comprises between 20 and 70% in volume of active carbon over a thickness between 20 μm and 200 μm.

A friction material for friction in liquid medium, the friction material including:

• a mat comprising fibers being carded, lapped and needled during the formation of the mat;
• and
• charges of active carbon with specific surface between 500 sq·m·/gr and 2500 sq·m·/gr and with mass content in the friction material equal to or in excess of 5% in weight and equal to or below 15% in weight;
• the mat of the fibers being impregnated by a heat-hardening resin;
• the carded, lapped and needled fibers being equal to or in excess of 12 mm in length;
• the friction material having porosity equal to or in excess of 30% in volume and equal to or below 60% in volume, wherein
• one side of the friction material, intended to form a friction surface, comprises between 20 and 70% in volume of active carbon over a thickness between 20 μm and 200 μm.