Unicharm Corporation

Katsuhiro Uematsu

Hideyuki Ishikawa

Toru Oba

Satoshi Mizutani

Kazuya Nishitani

Akihiro Kimura

Yukihiro Ito

Koichiro Tani

Masashi Yamaguchi

Hiroyuki Harada

Kouichirou Tani

Quing Cao

To provide an absorbent article that can further reduce leakage of body fluid from an end portion in a longitudinal direction. An elongated shaped absorbent article includes: a top sheet that has a skin contacting surface; a back sheet; and an absorbent core that is disposed between the top sheet and the back sheet, in which a compressed groove is formed on the skin contacting surface; the skin contacting surface has an excretory contact region, a front region, and a rear region; the compressed groove has a pair of first central grooves and a first circular groove that is provided in at least any one of the front region and the rear region; and the first circular groove is arranged at a position overlapping a vertical center line.

Absorbent article with compressed grooves

A sheet of nonwoven fabric which has surface irregularities, the shape of the surface irregularities being less apt to be changed by external pressure, etc. The sheet has a machine, cross and thickness directions which are perpendicular to one another. The upper surface has a plurality of protrusions continuously extending, in parallel, in the cross direction and further has a plurality of recesses that are located between the adjacent protrusions and extend in the cross direction. The sheet includes first and second fibrous layers located on the upper-surface side and the lower-surface side, respectively. The first fibrous layer comprises heat-fusible fibers, and the second fibrous layer comprises coil-shaped three-dimensional crimp fibers that are oriented mainly in the machine direction and form a network by entanglement thereof without having been fused at the sites where the crimp fibers cross one another.

Production process of a nonwoven fabric sheet

A nonwoven sheet for use in absorbent articles such as disposable diapers which is capable of reducing the range of surface diffusion of, and reducing re-adhesion to the skin of, highly viscous fluid excretion. The nonwoven sheet has mutually perpendicular longitudinal, transverse and thickness directions, and has in the aforementioned thickness direction a front surface and a back surface opposite thereof. Ridges and grooves are formed alternately so as to extend in parallel in the aforementioned longitudinal direction and so as to form repeated undulations in the aforementioned transverse direction. The nonwoven sheet has a bottom surface which, when the aforementioned nonwoven sheet is placed on a horizontal surface with the back surface (opposite of the front surface in contact with the skin of the wearer) down, is the surface that contacts the aforementioned horizontal surface. On the back surface of the aforementioned grooves are formed in the aforementioned longitudinal direction alternately areas where the height from the bottom surface is relatively high and parts corresponding to the bottom surface. Openings are formed at least in the areas where the height from the bottom surface is relatively high, and a space is provided below said openings.

Non-woven sheet, manufacturing method thereof and absorbent article

The invention provides a nonwoven fabric having good fluid drawing properties, in which fluid hardly remains, a method for producing a nonwoven fabric, and an absorbent article. The nonwoven fabric has a thickness direction and a planar direction perpendicular to the thickness direction, and includes a high density region having a higher fiber density than an average fiber density. The high density region penetrates from one side to another side in the thickness direction.

Nonwoven fabric, method for producing nonwoven fabric, and absorbent article

The present invention aims at providing a non-woven fabric having high-density regions and low-density regions dispersed horizontally, so as not to prevent liquid transfer from a surface sheet to an absorbent body and not to diffuse a liquid less during transfer, a manufacturing method thereof, and a disposable diaper made therefrom. The non-woven fabricincludes a plurality of high-density regionsand a plurality of low-density regionsdispersedly formed in a planar direction thereof. The high-density regionsare formed dominantly on at least one side of the non-woven fabric, and the low-density regionsare formed communicating both sides thereof.

Growing community of inventors

Kagawa, Japan

Katsuhiro Uematsu