A disposable absorbent article having a topsheet, a backsheet, and an absorbent core structure therebetween. The absorbent core structure having an upper nonwoven layer, a lower nonwoven layer, and a portion of an inner core layer disposed therebetween. The portion of the inner core layer is contained within the upper and lower nonwoven layers by sealing a portion of the first and second side regions of the upper nonwoven layer with a portion of the first and second side regions of the lower nonwoven layer at a lateral perimeter seal. An adhesive is positioned between the upper and nonwoven layers in the perimeter seal. The lateral perimeter seal is positioned in the middle region and has a longitudinal seal length that is from about 45% to about 90% of the longitudinal inner core length.

An absorbent article in which an absorber includes an upper auxiliary layer disposed on an uppermost portion and a main absorption layer disposed on a back surface side of the upper auxiliary layer, and the upper auxiliary layer includes a super absorbent nonwoven fabric having a surface exposed to an uppermost surface of the absorber and having a Klemm water absorptiveness of 100 mm or more.

[Object] To provide a method for producing an absorbent article comprising a fiber assembly layer of a cellulose acetate fiber, which can sufficiently apply a drug to the cellulose acetate fiber.

[Solution] A method for producing an absorbent article, wherein the absorbent article comprises: a fiber assembly layer including a cellulose acetate fiber, and a member including a water absorbent fiber and directly disposed on the fiber assembly layer, and the method comprises: a first step of opening a cellulose acetate tow and collecting a cellulose acetate fiber to form a fiber assembly layer, a second step of spreading a fiber solvent on the fiber assembly layer and drying the fiber assembly layer; a third step of spreading a drug aqueous solution containing an antibacterial agent and/or a deodorizer on the surface where the fiber solvent has been spread of the fiber assembly layer; and a fourth step of mounting the member on the surface where the drug aqueous solution has been spread of the fiber assembly layer.

A water-dispersible fluid absorber such as a sanitary pad includes a water-dispersible top layer; a water-dispersible absorbent layer; a leakproof layer of a polyvinyl alcohol; and a water-dispersible bottom layer. The leakproof layer is bonded to the top layer and the bottom layer by ultrasonic welding. A method of manufacturing a water-dispersible fluid absorber such as a sanitary pad includes assembling a water-dispersible top layer, a water-dispersible absorbent layer, a leakproof layer of a polyvinyl alcohol and a water-dispersible bottom layer; and bonding the leakproof layer to the top layer and the bottom layer by ultrasonic welding. A further water-dispersible fluid absorber includes a cellulose-based super absorbent material, an alginate-based super absorbent material, a chitosan-based super absorbent material, and/or a polyethylene glycol-based super absorbent material. A further water-dispersible fluid absorber comprises a thick portion formed to create a raised area under the perineum. A further water-dispersible fluid absorber includes a pressure sensitive adhesive arranged in a plurality of portions.

The present invention is an absorbent core that may be incorporated into absorbent hygiene articles, such as baby diapers, adult incontinence or feminine hygiene articles. It is particularly suited for articles which are intended to receive more than one liquid gush load, as the absorbent core comprises a fluid distribution layer that comprises sub-layers comprising particular ratios of multicomponent binder fibers, cross-linked cellulose fiber and/or treated or untreated cellulosic fibers.

An absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core positioned between the liquid pervious topsheet and the liquid impervious backsheet; said absorbent article having a first and second longitudinal edge and a first and second transverse edge; wherein the absorbent core comprises a bottom core wrap sheet, absorbent material, and a liquid management structure, wherein the absorbent material is positioned directly between the bottom core wrap sheet and the liquid management structure; and wherein the liquid management structure covers at least a surface portion of the absorbent material and comprises at least one channel portion forming at least one channel zone in the absorbent core.

The sanitary napkin has a semisolid structure affixed along the center base of it. The semisolid structure is an elongated form of matter that goes along the base of the sanitary napkin. Surrounding the affixed center base semisolid structure is material that is not semisolid or solid, but soft and consistent with the rest of the sanitary napkin.

[Technical problem] A disposable diaper having excellent performances in both the absorbable capacity and the absorption rate, is provided. [Solution to problem] The above problem is solved by a pad type disposable diaper 200, in which a top sheet 22 is formed of a thermoplastic nonwoven fabric, and absorbent bodies 23A and 23B are formed of a lower layer absorbent body 23B and an upper layer absorbent body 23A provided on a front surface of the lower layer absorbent body 23B, wherein a slit 40 having a predetermined width is provided in the upper layer absorbent body 23A at least at a crotch portion C2 so as to extend in a front-back direction, and the slit 40 having the predetermined width is not provided in the lower layer absorbent body 23B, the top sheet 22 includes a depressed portion 30 that is depressed into the slit 40, and multiple low permeation portions 80 are provided with intervals at least in the depressed portion 30, the low permeation portions 80 being portions in which fibers are welded to each other in a state of being compressed in a thickness direction.

A sanitary protective napkin has a backing panel having an overall length, a width and a thickness, in a first shape having an outer periphery, an absorbent pad joined to the backing panel by a first adhesive on one side of the backing panel, the absorbent pad having a second shape, leaving a region of a common width around the outer periphery of the backing panel, and a second adhesive compatible with human skin applied to the region of common width around the periphery of the backing panel on the same side of the backing panel as the absorbent pad, enabling a user to apply the sanitary napkin with no undergarment or other device for anchoring the sanitary napkin.

An absorbent core comprising: a front portion; a back portion; a middle portion position between the front portion and the back portion; and a longitudinal axis extending along a length of said core and crossing said front, middle and back portions, the absorbent core having a width extending perpendicular to said length and a perimeter comprising at least two opposing ends and at least two opposing sides positioned between said ends, said core comprising an absorbent material sandwiched between upper and lower layers of said core wherein the absorbent core comprises at least one interconnected channel substantially free of absorbent material and with at least portions thereof extending along both the length and the width of said core arranged to form an open end proximal to the front portion and a closed end proximal to the back portion and wherein said channel is formed by mechanically bonding said upper layer directly to said lower layer at a plurality of distinct bonding sites, wherein each channel portion comprises no more than two consecutive bonding sites taken along a channel width axis.