Filter core and manufacturing method thereof

A manufacturing method of a filter core comprising steps as follows:

• (a) adhering a wavy filtering sheet and a flat filtering sheet, wherein the wavy filtering sheet is for filtering suspended pollutants and has multiple peaks, an outlet side, an inlet side opposite the outlet side, a first surface and a second surface opposite the first surface;
• the first surface is coated with a first end sealing adhesive layer, and the first end sealing adhesive layer is coated along the outlet side and arranged apart from the outlet side;
• the flat filtering sheet for filtering suspended pollutants is adhered with the first surface of the wavy filtering sheet by the first end sealing adhesive layer;
• (b) pressing the wavy filtering sheet and the flat filtering sheet:
• pressing the second surface of the wavy filtering sheet along the outlet side of the wavy filtering sheet to form a first pressing region and a second pressing region;
• wherein the first pressing region is disposed between the outlet side of the wavy filtering sheet and the first end sealing adhesive layer, and the first end sealing adhesive layer is disposed between the first pressing region and the second pressing region;
• the peaks of the wavy filtering sheet in the first pressing region and in the second pressing region are pressed to lean toward a same side;
• and
• (c) rolling the wavy filtering sheet and the flat filtering sheet:
• coating a second end sealing adhesive layer on the second surface of the wavy filtering sheet, then rolling the wavy filtering sheet and the flat filtering sheet and making the wavy filtering sheet and the flat filtering sheet adhered with each other and fixed into a rolled shape by the second end sealing adhesive layer to form a filter core.