NONWOVEN FABRIC AND PRODUCTION METHOD THEREOF

To provide a nonwoven fabric that has a soft and good cushioning property and is composed of a bulky and thick fiber structure so that the thickness can be retained and is hard to be crushed when used under pressure.SOLUTION: A nonwoven fabric is formed by laminating two or more fiber layers in a thickness direction. A first fiber layer on one surface side has convex parts and concave parts. A second fiber layer adjacent to the first fiber layer on the other surface side in the thickness direction has convex parts entering inside on the other surface side of the convex part of the first fiber layer. Fused parts of interlaminar fiber intersection points are included at least in an interface between a wall part in the convex part on the first fiber layer and a wall part in the convex part of the second fiber layer. Wall part fiber orientation in the wall part of the convex part of the first fiber layer is 0.70 to 0.99. A ratio of the wall part fiber orientation in the convex part of the first fiber layer to the wall part fiber orientation in the convex part of the second fiber layer (former/latter) is 1.1 to 1.5.SELECTED DRAWING: Figure 1 【課題】柔らかで良好なクッション性を有しつつ、嵩高で厚みがある繊維構造からなり、該厚みが加圧使用下で保持でき、潰れ難い不織布を提供する。【解決手段】２層以上の繊維層が厚み方向に積層された不織布であって、一方の面側の第一繊維層が、凸部と凹部とを有し、前記第一繊維層に対して他方の面側に厚み方向に隣接する第二繊維層が、前記第一繊維層の前記凸部の前記他方の面側の内部に進入している凸部を有し、少なくとも、前記第一繊維層の凸部における壁部と前記第二繊維層の凸部における壁部との界面に層間繊維交点融着部が含まれており、前記第一繊維層の凸部の壁部において、壁部繊維配向度が０．７０以上０．９９以下であり、前記第一繊維層の凸部における壁部繊維配向度の、前記第二繊維層の凸部における壁部繊維配向度に対する比（前者／後者）が、１．１以上１．５以下である、不織布。【選択図】図１