Patent ID: 6702879
Filing Date: 2004-03-09
Classification: B01D,Y10S

Abstract:
An air filtering material for arresting dust from air that is caused to flow through the material, to thereby clean the air, comprising:a nonwoven fabric made of hollow chemical fibers each having therein a hole extending longitudinally thereof; each of said hollow chemical fibers having cracks and/or fissures defining minute clearances formed in an outer wall thereof so as to reach the longitudinal hole to thereby communicate the longitudinal hole with an exterior of the fiber; and an oil impregnated within said longitudinal hole, said cracks and fissures having a width on the order of a micrometer or micrometers so that the oil within the longitudinal hole is caused to gradually exude through the cracks and fissures to the exterior of the fiber, whereby the dust is arrested by the exuding oil.