| 摘要 |
PURPOSE: To provide the subject homogeneous nonwoven fabric sheet that is prepared by opening the nonwoven sheet formed by piling up the opened three- dimensional network fibers in a random direction with a specific structure and is satisfactorily useful in the fields of filtration and hygienic materials, since they have extremely high homogeneity. CONSTITUTION: In the non-woven fabric sheet prepared by piling up the opened three-dimensional network fibers in the random direction, the bundle-like pieces distributing in the network fiber groups constituting the nonwoven fabric sheet has (A) the density of <=40 denier/mm width or has (B) the width of <=5 mm and the length of <=30 mm, when the bundle has the density of >=40 denier/mm width. |
