Wet-laid non-woven fabric for hydrocarbon trap of air cleaner for gasoline engine and manufacturing method thereof

A method for manufacturing a wet-laid non-woven fabric for a hydrocarbon trap of an air cleaner for a gasoline engine, which is installed in the air cleaner for a gasoline engine to capture hydrocarbon in evaporation gases generated from a fuel in a combustion chamber of an engine or a fuel storage tank during driving or stoppage of a vehicle or to recover the captured hydrocarbon to the engine so as to be rebumed therein, the method comprising:

• preparing basic materials which include powdery activated carbon, pulp, a synthetic fiber and a carbon binder, wherein the powdery activated carbon used herein has an average particle size in a range of 20 to 150 μm and contains 45 to 90% of meso-structure, and the synthetic fiber used herein has a diameter of 30 μm or less and a melting point of 110° C. to 270° C.;
• passing the basic materials through a suspension process to prepare a suspension;
• subjecting the basic materials passed through the suspension process to a web formation process to form a web type product;
• subjecting the web type product to a water removal process;
• drying the web type product in a drying process after the water removal process;
• and
• subjecting the web type product after the drying process to a heat compressing process to conduct heat compressing and molding, so as to form a sheet type or roll type fabric.