FILTERING LAYER FOR DUST AND MANUFACTURING METHOD THEREOF, FILTER FOR DUST COLLECTOR BY USING THE SAME

摘要

A filtering membrane of the present invention has inner curved faces with inner protrusions and inner recessions; has an inner curved unit comprising a recession bending on the inner curved face formed by thread coming out of the inner recession and tension in the recession direction; outer curved faces with outer recessions and outer protrusions; and an outer curved unit comprising a recession bending on the outer curved face formed by thread coming out of the inner recession and tension in the recession direction. The inner curved unit and the outer curved unit can have an alternating wrinkle shape by connecting via a filter cloth.