Filter Medium and Filter Element Having a Filter Medium

A filter medium (1, 11) comprising:

• a first media layer (3, 13);
• a second media layer (4, 14);
• and
• at least one third media layer (5, 15 or 16);
• wherein the second media layer (4, 14) is arranged downstream from the first media layer (3, 13) in the intended direction of flow (2, 12) of the filter medium (1, 11);
• wherein the third media layer (5, 15) is arranged downstream from the second media layer (4, 14) in the intended direction of flow (2, 12) through the filter medium;
• wherein the first media layer has a degree of particle separation, which is lower than the degree of particle separation of the second media layer;
• wherein the second media layer has a degree of particle separation which is lower than the degree of particle separation of the third media layer;
• and
• wherein the media layers (3, 4, 5, 13, 14, 15) are not bonded to one another in a firmly bonded manner or in a spot-bonded manner;
• wherein the layers (3, 13, 4, 14, 5, 15, 16) are bonded to one another in a firmly bonded manner over less than 3% of the area content, remaining area being unbonded.

A filter element, comprising:

• a filter medium pleated in the form of a star to form a round filter body;
• a first end disk arranged on and closing a first axial end face of the filter medium of the round body;
• a second end disk arranged on and closing a second axial end face of the filter medium of the round body;
• the filter medium, including:
• a first media layer (3, 13);
• a second media layer (4, 14);
• and
• at least one third media layer (5, 15 or 16);
• wherein the second media layer (4, 14) is arranged downstream from the first media layer (3, 13) in the intended direction of flow (2, 12) of the filter medium (1, 11);
• wherein the third media layer (5, 15) is arranged downstream from the second media layer (4, 14) in the intended direction of flow (2, 12) through the filter medium;
• wherein the first media layer has a degree of particle separation, which is lower than the degree of particle separation of the second media layer;
• wherein the second media layer has a degree of particle separation which is lower than the degree of particle separation of the third media layer;
• and
• wherein the media layers (3, 4, 5, 13, 14, 15) are not bonded to one another, or wherein the layers (3, 13, 4, 14, 5, 15, 16) are bonded to one another in a firmly bonded manner over less than 3% of layer area, remaining area being unbonded.