Filter cartridge and manufacturing method thereof

A manufacturing method of a filter cartridge comprising:

• (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 to the outlet side, a first surface and a second surface opposite to the first surface;
• the peaks extend to the inlet side and the outlet side, and the peaks are arranged apart from each other along a spaced-apart direction;
• the first surface is coated with a connecting adhesive layer and a first end sealing adhesive layer;
• 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 connecting adhesive layer and 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 and from the outlet side to a part of the first end sealing adhesive layer to form a first pressing region to make the peaks in the first pressing region lean toward the spaced-apart direction;
• (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 along the inlet side, then rolling the wavy filtering sheet and the flat filtering sheet and making the wavy filtering sheet and the flat filtering sheet adhere to each other and fixed into a rolled shape by the second end sealing adhesive layer;
• and
• (d) mounting a filter frame, wherein the filter frame is mounted on the rolled filtering sheets to form a filter cartridge.