| 摘要 |
PROBLEM TO BE SOLVED: To obtain an anisotropically lustrous nonwoven fabric satisfying a deep coloring property, a clarity and a luster simultaneously by laminating an intertwined nonwoven fabric constituted by flat light interferential fibers on one side surface or both sides of a deeply colored nonwoven fabric base material. SOLUTION: This anisotropically lustrous nonwoven fabric is obtained by spinning and stretching a filament having a flat cross section obtained by laminating alternately at least 2 kinds of polymers having different refractive indices consisting of a high refractive index polymer such as a modified polyethylene terephthalate, etc., produced by copolymerizing with a sulfoisophthalic acid salt and a low refractive index polymer such as an aliphatic polyamide, etc., in parallel to a long axis direction of the flat cross section to obtain a light interferential fiber, twisting, imparting compressed crimps thereto and cutting to form staple fibers, then forming a web by treating with a card, then treating with a needle punch to form an intertwining nonwoven fabric, and then laminating the intertwined nonwoven fabric on the one side surface or both sides of a nonwoven fabric material constituted with deeply colored fibers having <=40 L-value so as to make then into one unit. |
