| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an adsorptive filter having high adsorption performance, small in pressure loss and capable of removing fine particles such as dust by flocking an activated carbon fiber at least on one surface of a base material made of a pleated nonwoven fabric excellent in air permeability. SOLUTION: A filter 1 having adsorptivity to a gas or a solute or the like in a solution is produced by applying an adhesive on the base material 2 composed of the nonwoven fabric, on which pleats having peak parts 4 and root parts 5 are formed and which is excellent in air permeability, and flocking the activated carbon fiber 3 by utilizing attractive force in electrostatic filed. The flocking of the activated carbon fiber 3 is performed by applying the adhesive on the nonwoven fabric and impressing electrostatic field by an electrostatic flocking machine to make the activated carbon fiber 3 adsorbed. The impressed electrostatic field to be used is, for example, 40-60 kV. The base material 2 is preferably one having a coarse mesh and excellent air permeability if in a range capable of flocking the activated carbon fiber 3 in a quantity necessary for obtaining the required adsorption performance.</p> |
