Nonwoven fabric containing fine fibers, and a filter material
AssigneeJapan Vilene Company, Ltd.
InventorsToshio Aikawa, Noriko Miyaguchi, Takashi Tarao, Hitoshi Kobayashi
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Abstract
A nonwoven fabric prepared from fibers which are not substantially fibrillated and have a diameter of less than 20 μm, by fusing a fiber web comprising fine fibers having a diameter of 4 μm or less, and adhesive fibers having a diameter ranging from 8 μm to less than 20 μm, wherein a maximum pore size in the nonwoven fabric is not more than twice the mean flow pore size of the nonwoven fabric is disclosed.
Claims6
A nonwoven fabric prepared from fibers which are not substantially fibrillated and have a diameter of less than 20 μm, by fusing the fiber web comprising fine fibers having a diameter of 4 μm or less, and adhesive fibers having a diameter ranging from 8 μm to less than 20 μm, wherein the maximum pore size in said nonwoven fabric is not more than twice a mean flow pore size of said nonwoven fabric and wherein the ratio (Sf/Af) of a standard deviation (Sf) of a fiber size distribution of said fine fibers to an average (Af) of the diameter of the fine fibers does not exceed 0.2.
Dependencies are inferred from the claim text.