JP7459676B2 - Absorbent articles - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers, absorbent pads (urine pads), and sanitary napkins are known. Absorbent articles are made of pulp or super absorbent polymer (SAP) and have an absorbent body that absorbs liquids such as urine and body fluids. Patent Document 1 describes an absorbent article in which grooves are formed in the absorbent body extending in the longitudinal direction.

JP 2017-189243 A

In some absorbent articles, grooves are formed in the absorbent body to improve the diffusion of urine. However, the rate at which urine is absorbed from the sides and bottom of the grooves is slower than the rate at which urine is absorbed from the surface of the absorbent body, and there is a risk that urine that is not absorbed from the sides and bottom of the grooves will reach the rear end of the groove. For this reason, for example, if the rear end of the groove is provided near the rear end of the absorbent body, there is a risk that urine that overflows from the rear end of the groove will pass the rear end of the absorbent body and leak out of the absorbent article. In addition, if the length of the groove on the rear side from the position of the urethral opening is formed short, more urine will reach the rear end of the groove, and there is a risk that urine will flow toward the width direction of the absorbent body and leak from the width direction end of the absorbent body, causing lateral leakage.

Therefore, the present invention aims to provide an absorbent article that can prevent urine leakage.

To solve the above problem, the absorbent article of the present invention has a groove formed on the skin-facing side of the absorbent body and a guide section that guides urine to the skin-facing side outside the groove.

Specifically, the absorbent article according to the present invention is an absorbent article having a longitudinal direction and a width direction that are perpendicular to each other, and includes a liquid-permeable top sheet disposed on the skin side, and a liquid-permeable top sheet disposed on the skin side. a liquid-impermeable backsheet disposed on the non-skin side opposite to the top sheet, an absorbent body disposed between the top sheet and the backsheet, and a liquid-impermeable backsheet disposed on the skin side of the absorbent body The wearer includes a groove that extends in the longitudinal direction and allows urine excreted by the wearer to flow in the longitudinal direction, and a guide part that guides the urine to the skin surface side outside the groove.

The guide portion may be disposed inside the groove and formed integrally with the absorbent body.

The ratio of the cross-sectional area of the guide portion to the cross-sectional area of the groove when cut in the width direction may be 0.3 or more and 0.8 or less.

The above absorbent article has an adhesive area where the top sheet is adhered to the bottom of the groove, and a side where the top sheet is not adhered to the bottom of the groove and from the adhesive area to the skin side of the absorbent body. a non-adhesive region extending toward the skin surface side of the absorbent body, and the guide portion may be the top sheet between the adhesive region and the non-adhesive region extending toward the skin side of the absorbent body. good.

The groove may be formed in the center of the absorbent body in the width direction.

A plurality of the guide parts may be formed at predetermined intervals, and the guide parts adjacent in the longitudinal direction may guide the urine in different directions in the width direction.

The above-mentioned absorbent article includes a front body region located on the abdomen side of the wearer, a crotch region located on the crotch region, and a back body region located on the back side of the wearer in a worn state, and the absorbent article has a first branch groove that branches diagonally toward the front body region; and a second branch groove that branches from the groove diagonally to the longitudinal direction toward the rear body region. You may be prepared.

When the absorbent article is worn by a wearer so that the cross-sectional shape of the absorbent body in the width direction is U-shaped, the groove may be positioned so as to be located at a fold position in a direction away from the wearer's skin surface.

A plurality of grooves are formed in the absorber, and the plurality of grooves include a first groove disposed on one end side in the width direction and a second groove disposed on the other end side in the width direction. The groove may be configured to include a groove.

A plurality of guide portions are formed at predetermined intervals corresponding to the first groove and the second groove,
The guide portions that guide the urine toward the central portion in the width direction may be provided in greater number than the guide portions that guide the urine toward the end portions in the width direction of the absorber.

a direction in which the first groove and the second groove move away from the skin surface of the wearer when the absorbent article is worn on a wearer so that the cross-sectional shape in the width direction of the absorbent body is W-shaped; It may be arranged so as to be located at the fold line position.

The above absorbent article can suppress urine leakage.

FIG. 1 is a perspective view of a diaper according to Embodiment 1. FIG. 2 is an exploded perspective view of the diaper according to the first embodiment. FIG. 3 is a plan view of the diaper according to the first embodiment. FIG. 4A is an end view of a diaper according to embodiment 1. FIG. FIG. 4B is an end view of the diaper according to Embodiment 1. FIG. 5 is a table showing the results of a test conducted to verify the leakage suppression effect by changing the ratio of the cross-sectional area of the groove to the cross-sectional area of the protrusion. FIG. 6 is a plan view of a diaper according to Modification 1 of Embodiment 1. FIG. 7A is an end view of a diaper according to a first modification of the first embodiment. FIG. 7B is an end view of the diaper according to Modification 1 of Embodiment 1. FIG. 8 is a plan view of a diaper according to a second modification of the first embodiment. FIG. 9A is an end view of a diaper according to Modification 2 of Embodiment 1. FIG. 9B is an end view of the diaper according to Modification 2 of Embodiment 1. FIG. 10 is a plan view of a diaper according to a third modification of the first embodiment. FIG. 11A is an end view of a diaper according to a third modification of the first embodiment. FIG. 11B is an end view of a diaper according to Modification 3 of Embodiment 1. FIG. FIG. 12 is a plan view of a diaper according to Modification 4 of Embodiment 1. FIG. 13 is a plan view of a diaper according to a fifth modification of the first embodiment. FIG. 14 is a plan view of a diaper according to a sixth modified example of the first embodiment. FIG. 15 is a diagram schematically showing a cross section of the absorber in the width direction and the wearer's skin surface in the worn state. FIG. 16 is a diagram schematically showing a cross section in the width direction of the absorber in a worn state and a wearer's skin surface. FIG. 17 is a plan view of the diaper according to the second embodiment. FIG. 18 is an end view of a diaper according to the second embodiment. FIG. 19 is a table showing the results of a test conducted to verify the leakage suppression effect by changing the number of fine grooves and the fine groove interval. FIG. 20 is a plan view of a diaper according to a modification of the second embodiment. FIG. 21 is a plan view of a diaper according to a third embodiment. FIG. 22 is an end view of the diaper according to Embodiment 3. FIG. 23 is a plan view of a diaper according to a first modification of the third embodiment. FIG. 24 is a plan view of a diaper according to a second modification of the third embodiment.

EMBODIMENT OF THE INVENTION Below, the absorbent article based on embodiment of this invention is demonstrated with reference to drawings. Note that the configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.

<Embodiment 1>
In the present embodiment, a tape-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as a "diaper") is described with reference to a front body (see FIGS. The direction connecting the front body region 1F shown in FIG. 3 and the back body (back body region 1R shown in FIGS. 1 and 3) disposed opposite to the back is the longitudinal direction, and the direction perpendicular to the longitudinal direction is the width. direction. Between the front body (on one side in the longitudinal direction) and the back body (on the other side in the longitudinal direction) (at the center in the longitudinal direction) is an inseam that is placed at the wearer's crotch (located opposite the crotch). Department is located. In addition, when the diaper is worn on the wearer (hereinafter referred to as the "wearing state"), the side facing the wearer's skin (inner side when worn) is the skin side, and the side opposite to the skin side. (outside when worn) is the non-skin side. Further, the direction connecting the skin side and the non-skin side is defined as the thickness direction. The thickness direction is perpendicular to both the longitudinal direction and the width direction. In addition, viewing from the thickness direction is considered to be a planar view. Furthermore, the left and right directions when viewed in the direction from the back body region to the front body region are defined as the left and right directions.

1 is a perspective view of a diaper according to this embodiment. The diaper 1 has a crotch region 1B, which is a region corresponding to the crotch of the wearer that covers the pubic area of the wearer when worn, a front body region 1F, which is located in front of the crotch region 1B and corresponds to the front body of the wearer, and a rear body region 1R, which is located behind the crotch region 1B and corresponds to the rear body of the wearer. Tapes 2L and 2R that can be attached to a front patch 2F provided on the non-wearer side surface of the front body region 1F are provided on both left and right edges of the rear body region 1R. Thus, when the tapes 2L and 2R are attached to the front patch 2F with the front body region 1F positioned on the wearer's abdomen and the rear body region 1R positioned on the wearer's back, the diaper 1 is fixed to the wearer's body in a state that surrounds the wearer's abdominal circumference and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can stand and walk while wearing the diaper 1.

In the diaper 1, absorbent bodies capable of absorbing and retaining liquid are arranged mainly around the crotch region 1B. In addition, the diaper 1 has a region surrounding the wearer's legs (thighs) in order to suppress the formation of a gap between the diaper 1 and the wearer's skin, which becomes a flow path for liquid. Leg gathers 3AL and 3AR are provided, three-dimensional gathers 3BL and 3BR are provided on the inner side in the width direction of the diaper 1 than the leg gathers 3AL and 3AR, and waist gathers 3R are provided in a region surrounding the wearer's abdominal circumference. The leg gathers 3AL, 3AR, the three-dimensional gathers 3BL, 3BR, and the waist gathers 3R are brought into close contact with the wearer's skin by the elastic force of the elastic member. Therefore, liquid discharged from the wearer's genitals is absorbed into the absorbent body of the diaper 1 without leaking from the diaper 1. Note that as the elastic member, string-like or band-like rubber can be selected as appropriate.

FIG. 2 is an exploded perspective view of the diaper 1. The diaper 1 has a cover sheet 4 that forms an outer surface in the worn state. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance with constrictions 4KL and 4KR on the long sides, and forms the exterior surface of the diaper 1. The constrictions 4KL and 4KR are provided at locations where the wearer's thighs are located. The cover sheet 4 is provided to reinforce the back sheet 5, which will be described later, and to improve its feel.For example, in order to suppress the leakage of excrement, a nonwoven fabric made of liquid-impermeable thermoplastic resin is used as its material. be able to. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single layer structure, but may have a multilayer structure including an inner cover sheet and an outer cover sheet.

The diaper 1 has a back sheet 5, an absorbent body 6, and a top sheet 7, which are laminated in order on the wearer's side of the cover sheet 4. The back sheet 5, the absorbent body 6, and the top sheet 7 are all sheet-like members having an approximately rectangular appearance, and are laminated in order on the cover sheet 4 with their longitudinal direction coinciding with the longitudinal direction of the cover sheet 4. The back sheet 5 is disposed on the non-skin-facing side, which is the opposite side to the skin-facing side. The back sheet 5, like the cover sheet 4, is a sheet formed from a liquid-impermeable thermoplastic resin material to suppress leakage of excrement. The back sheet 5 is preferably composed of a material that also has moisture permeability in order to suppress stuffiness when worn. The top sheet 7 is a sheet-like member that is disposed on the skin-facing side of the wearer so as to cover the water-absorbing surface of the absorbent body 6. The top sheet 7 is liquid permeable in part or in its entirety. Therefore, when the diaper 1 is worn, liquid excreted from the wearer passes through the top sheet 7, which may come into contact with the wearer's skin, into the absorbent body 6, and is absorbed therein. For example, woven fabric, nonwoven fabric, and porous film can be used as materials for the top sheet 7. The top sheet 7 may be hydrophilic.

The back sheet 5, absorbent body 6, and top sheet 7 all extend from the front body region 1F to the rear body region 1R. Therefore, when the wearer's genitals are covered with the cover sheet 4 in which the back sheet 5, absorbent body 6, and top sheet 7 are laminated, both ends in the longitudinal direction of the back sheet 5, absorbent body 6, and top sheet 7 are located on the wearer's ventral side and back side. In other words, the wearer's genitals are covered by the absorbent body 6 from the wearer's ventral side to the back side. Therefore, whether the wearer is in a ventral or back-facing position when excreting liquid, the excreted liquid comes into contact with the absorbent body 6 via the top sheet 7.

Further, in the diaper 1, elastic members 4SL and 4SR for forming the leg gathers 3AL and 3AR described above are provided between the cover sheet 4 and the back sheet 5 so as to expand and contract in the longitudinal direction of the diaper 1. The leg gathers 3AL, 3AR are provided to prevent a gap from being formed between the diaper 1 and the wearer's thighs. The elastic members 4SL and 4SR are provided in an appropriate number determined according to the elastic force (shrinkage force) required in the design of the diaper 1. The regions where the elastic members 4SL and 4SR are arranged become the leg gathers 3AL and 3AR.

Moreover, the diaper 1 has elongated strip-shaped side sheets 8L and 8R for forming three-dimensional gathers 3BL and 3BR. The side sheets 8L and 8R are liquid-impermeable sheets provided on the long sides of the top sheet 7. Similar to the three-dimensional gathers 3BL and 3BR of the diaper 1, the side sheets 8L and 8R are provided with constrictions 8KL and 8KR at locations where the wearer's thighs are located. Elastic members 8EL and 8ER are woven into the side sheets 8L and 8R along the longitudinal direction. Therefore, when the diaper 1 is put on, that is, when the diaper 1 has a U-shape or a W-shape when viewed from the side, the side sheets 8L and 8R are pulled in the longitudinal direction by the contractile force of the elastic members 8EL and 8ER. The three-dimensional gathers 3BL and 3BR stand up from the top sheet 7 and prevent liquid from flowing out.

Further, the elastic member 9ER for forming the above-mentioned waist gathers 3R is provided between the backsheet 5 and the topsheet 7 at a position further back than the end of the absorbent core 6. The elastic member 9ER is provided between the backsheet 5 and the topsheet 7 such that the longitudinal direction, which is the stretching direction, is the left-right direction of the diaper 1. Therefore, when the tapes 2L and 2R provided on the left and right sides of the elastic member 9ER are attached to the front patch 2F on the ventral side of the wearer, the elastic member 9ER exerts a contractile force to attach the diaper 1 to the wearer. This prevents a gap from being formed between the diaper 1 and the wearer's abdominal circumference.

The absorbent body 6 has a structure in which granular absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a cross-linked structure capable of absorbing and retaining water, is held in the gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been hydrophilically treated. Therefore, in the absorbent body 6, the volume change of the absorbent resin before and after absorbing liquid basically occurs within the short fibers that hold the absorbent resin in the gaps. Therefore, when looking at the entire absorbent body 6, it can be said that the expansion rate of the thickness of the absorbent body 6 that has absorbed liquid is not as large as the expansion rate of the absorbent resin itself. The absorbent body 6 may be composed of an absorbent core made of short fibers or synthetic fibers, and a core wrap sheet that wraps the absorbent core. For example, tissue paper is used for the core wrap sheet.

The SAP particles of this embodiment refer to particles of a resin composition containing SAP. The "resin composition containing SAP" as used herein refers to both compositions consisting only of SAP and compositions containing SAP as a main component and containing other substances to the extent that they do not adversely affect water absorption. It is a concept that encompasses Examples of "other substances" include additives (such as a surface modifier added for the purpose of making the particle surface hydrophobic), unreacted monomers remaining during the synthesis of SAP, and the like.

Figure 3 is a plan view showing a diaper 1 in a stretched state. The diaper 1 has grooves 10 formed on the skin-facing side (top sheet 7 side) of the absorbent 6. The grooves 10 extend in the longitudinal direction of the diaper 1 and are provided to allow urine discharged by the wearer to flow in the longitudinal direction and to be dispersed throughout the absorbent 6. For example, the grooves 10 have a width of 40 to 50 mm and a length of 100 to 400 mm. The grooves 10 are located in the widthwise center of the diaper 1 and have both longitudinal ends located in the middle of the front body region 1F and the rear body region 1R, and are formed to include a region 12 corresponding to the wearer's urethral opening (hereinafter referred to as the "urethral opening corresponding region 12"). This makes it easier for urine discharged by the wearer to flow into the grooves 10. The longitudinal center position of the grooves 10 is on the front body region 1F side from the center of the absorbent 6. The grooves 10 may also be formed penetrating the absorbent core of the absorbent body 6.

The region 12 corresponding to the urethral meatus exists in the front range from the central region in the longitudinal direction of the groove 10 . The urethral opening corresponding region 12 is a region where the wearer's urethral opening comes into contact with the top sheet 7, or a region where the wearer's urethral opening faces, and is a urination position. The urethral opening corresponding area 12 is defined in consideration of individual differences in the position of the urethral opening of the wearer, differences between men and women, minute positional deviations of the diaper 1 that occur for each wearer, and the like.

4A is an end view of the diaper 1 taken along the line AA shown in FIG. 3. FIG. 4B is an end view of the diaper 1 taken along the line BB shown in FIG. 3. FIG. In this embodiment, the groove 10 is formed in a non-penetrating type that does not penetrate the absorber 6 in the thickness direction. Further, as shown in FIGS. 3 and 4B, the diaper 1 according to the present embodiment includes a protrusion 10a (an example of a "guidance part") arranged inside the groove 10. The protrusion 10a is integrally formed with the absorber 6. For example, the absorbent body 6 in which the grooves 10 and the protrusions 10a are integrally formed is manufactured by laminating fibers on a forming drum whose outer peripheral surface is formed with a mold corresponding to the molding pattern of the grooves 10 and the protrusions 10a. can do.

Generally, in absorbent articles, grooves or slits are formed in the absorbent body in order to improve the diffusion of urine. However, the rate at which urine is absorbed from the sides and bottom of the groove is slower than the rate at which it is absorbed from the surface of the absorbent body, and a large amount of urine reaches the rear end of the groove and leaks from the rear end of the absorbent article. There is a risk of it getting lost. On the other hand, the diaper 1 according to the present embodiment includes a protrusion 10a (an example of a "guidance part") formed inside the groove 10. The protrusion 10a obstructs the flow of urine within the groove 10, causing the urine to overflow and guide it to the outside of the groove 10 toward the skin surface. In the diaper 1 according to the present embodiment, by providing the projection 10a on the rear body region 1R side of the urethral opening corresponding region 12, urine flowing in the groove 10 on the rear body region 1R side of the urethral opening corresponding region 12 can be removed. A portion is guided to the skin surface side outside the groove 10. Urine guided to the skin side of the top sheet 7 by the projections 10a is absorbed from the skin side of the absorbent body 6. Thereby, the diaper 1 can prevent a large amount of urine from reaching the rear end of the groove 10, and can suppress urine from leaking from the rear end of the diaper 1.

Here, the outer skin side of the groove 10 where the protrusion 10a guides urine may be the skin side of the top sheet 7 adjacent to the groove 10, or the skin side of the absorbent body 6 adjacent to the groove 10. It may be on the skin side of the absorbent body 6 , on the skin side of the absorbent body 6 near the groove 10 , or between the absorbent body 6 and the top sheet 7 .

The protrusions 10a can also be said to have the following functions. For example, the protrusions 10a guide urine in the grooves 10 to the skin-facing side of the top sheet 7 adjacent to the grooves 10. The protrusions 10a guide a portion of the urine flowing through the grooves 10 to the skin-facing side of the absorbent 6 adjacent to the grooves 10. The protrusions 10a guide a portion of the urine flowing through the grooves 10 to the skin-facing side of the absorbent 6 near the grooves 10. The protrusions 10a may also guide urine between the absorbent 6 and the top sheet 7. This allows the diaper 1 to prevent urine from coming into contact with the wearer's skin, improving the wearing comfort.

Moreover, the diaper 1 according to this embodiment includes three-dimensional gathers 3BL and 3BR. The three-dimensional gathers 3BL and 3BR suppress lateral leakage of urine from the widthwise ends of the diaper 1. The three-dimensional gathers 3BL and 3BR can suitably suppress side leakage of urine guided to the skin surface side outside the groove 10 by the protrusion 10a.

Moreover, the diaper 1 according to the present embodiment includes leg gathers 3AL and 3AR. The leg gathers 3AL and 3AR prevent a gap from being formed between the diaper 1 and the wearer's thighs, and suppress lateral leakage of urine from the widthwise ends of the diaper 1. The three-dimensional gathers 3BL and 3BR can suitably suppress side leakage of urine guided to the skin surface side outside the groove 10 by the protrusion 10a.

In this embodiment, three protrusions 10a are arranged at equal intervals behind the urethral opening region 12 (towards the rear body region 1R). The arrangement interval and number of protrusions 10a can be set appropriately depending on the overall absorption capacity of the diaper 1, size, whether for adults or babies, etc. Only one protrusion 10a may be formed.

Here, for example, it is known that the amount of urine urinated by a cared person at one time is 150 to 200 ml. In order to prevent 150 to 200 ml of urine from reaching the rear end of the groove 10 and leaking from the rear end of the diaper 1, the amount of urine overflowing from the groove 10 is controlled by the protrusion 10a in the width direction of the diaper 1. It can be adjusted by adjusting the ratio of the cross-sectional area of the groove 10 to the cross-sectional area of the groove 10. In this embodiment, a test was conducted to verify whether leakage could be suppressed by changing the ratio of the cross-sectional area of the groove and the protrusion. In this test, seven types of diapers, samples 1 to 7, were made. The steps of the test method are as follows. First, the diaper is installed in a longitudinally inclined state at an angle of 60 degrees, with the front body region facing upward and the back body region facing downward. Next, 200 ml of artificial urine is injected from a burette into the area corresponding to the urethral opening of the diaper at a rate of 10 ml/sec. Then, 10 minutes later, 200 ml of artificial urine is similarly injected. Injection of artificial urine is repeated until this artificial urine leaks out of the diaper. The artificial urine was prepared by dissolving 80.4 g of sodium chloride, 194 g of urea, 20.5 g of magnesium sulfate heptahydrate, and 8.4 g of calcium chloride dihydrate in 10 L (liter) of ion-exchanged water.

FIG. 5 is a table showing the results of this test. The columns "1" to "7" in FIG. 5 are the sample numbers of the diapers produced in this test. Moreover, the item "Cross-sectional area of groove (mm ² )" in FIG. 5 indicates the cross-sectional area of the groove when the diaper of each sample is cut in the width direction. The item "Cross-sectional area of protrusion (mm ² )" in FIG. 5 indicates the cross-sectional area of the protrusion when the diaper of each sample is cut in the width direction. Note that the protrusion is formed into a hollow shape using a core wrap sheet that wraps around the absorbent core of the absorbent body and a top sheet. The cross-sectional area of the protrusion when the diaper of each sample is cut in the longitudinal direction is 200 mm ² . The item "Ratio" in FIG. 5 indicates the value of the ratio of the cross-sectional area of the protrusion to the cross-sectional area of the groove (cross-sectional area of the protrusion/cross-sectional area of the groove) in the diaper of each sample. Note that each cross-sectional area in the ratio value is the cross-sectional area when the diaper is cut in the width direction. The item "Number of protrusions" in FIG. 5 indicates the number of protrusions formed. Note that since the diaper of Sample 7 is a comparison target in which no protrusions are formed, "0" is written in the item to indicate that no protrusions are formed. Note that the interval between the three protrusions was 20 mm. The item "longitudinal flow distance" in FIG. 5 indicates the distance that the artificial urine reaches from the position where the artificial urine is injected into the diaper to the rear body region side in the longitudinal direction of the diaper. The item "width direction diffusion distance (mm)" in FIG. 5 is the reach distance of artificial urine in the width direction of the diaper of each sample. The item "absorption amount (g)" in FIG. 5 is the amount (g) of artificial urine absorbed by each sample diaper. The item "Leakage control" in Figure 5 indicates whether or not each sample diaper was able to suppress leakage. "○" in "Leakage control" indicates that the diaper in that column was able to suppress leakage. An "x" in "Leakage Suppression" indicates that the diaper in that column was unable to suppress leakage. In addition, in this test, a case where artificial urine leaked from the diaper during the second cycle of injection of artificial urine was considered to be a failure to suppress leakage. In the diaper of each sample, the groove was formed to penetrate the absorbent core, the width of the groove was 25 mm, and the length from the artificial urine injection position to the rear end of the groove was 220 mm. Furthermore, in each sample diaper, the length of the absorbent body from the artificial urine injection position to the rear end was 330 mm, and the width of the absorbent body was 150 mm. In the absorbent body, the pulp has a basis weight of 413 g/m ² and the SAP has a basis weight of 237 g/m ² . The tissue paper of the core wrap sheet has a basis weight of 237 g/m ² . The core wrap sheets were placed above and below the absorbent core. A water permeable polyethylene sheet was used for the back sheet. A polypropylene sheet and air-through nonwoven fabric were used for the top sheet. The air-through nonwoven fabric has a basis weight of 20 g/m ² .

As shown in the table of FIG. 5, it has been found that urine leakage can be suppressed by setting the ratio of the cross-sectional area of the protrusion to the cross-sectional area of the groove to be 0.3 or more and 0.8 or less. In the diaper 1 according to the present embodiment, the ratio of the cross-sectional area of the protrusion 10a to the cross-sectional area of the groove 10 when cut in the width direction is 0.3 or more and 0.8 or less. According to the diaper 1 having this configuration, leakage of urine can be suppressed. Further, the ratio of the cross-sectional area of the protrusion 10a and the groove 10 when cut in the width direction is more preferably 0.6 or more and 0.8 or less. As shown in the table of FIG. 5, the diaper with this ratio has an absorption amount of 500 g or more, and is capable of absorbing and retaining more urine. Note that the diaper of Sample 1 has a ratio of "1" and has a configuration in which the grooves are divided in the longitudinal direction by protrusions. Although the diaper of Sample 1 is able to suppress leakage, this configuration may cause urine to be spread too much in the width direction. If the ratio of the cross-sectional area of the protrusion 10a to the groove 10 is larger than 0.8, urine may be spread too much in the width direction, so the ratio is preferably set to 0.8 or less.

<Modification 1>
Next, a diaper 1 according to a first modification of the present embodiment will be described using FIGS. 6 to 7B. FIG. 6 is a plan view schematically showing a stretched state of the diaper 1 according to this modification. 7A is an end view of the diaper 1 according to this modification taken along line CC shown in FIG. 6, and FIG. 7B is an end view of the diaper 1 according to this modification taken along line DD shown in FIG. FIG.

In this modification, a plurality of protrusions are formed at a predetermined interval inside the groove 10, closer to the rear body region 1R than the urethral meatus corresponding region 12. As shown in FIG. 6, for example, four protrusions 100L, 100R are formed. The protrusion 100L is provided on the left side of the groove 10, and the protrusion 100R is provided on the right side of the groove 10. The protrusion 100L provided on the left side guides the urine flowing in the groove 10 to the skin surface on the left side of the groove 10 by overflowing the urine flowing in the groove 10 to the left. The protrusion 100R provided on the right side guides the urine flowing in the groove 10 to the skin surface on the right side of the groove 10 by overflowing the urine flowing in the groove 10 to the right. Thus, in this modification, the protrusions 100L, 100R adjacent to each other in the longitudinal direction guide the urine in different directions in the width direction. As a result, the diaper 1 of this modified example can guide urine evenly to the left and right from the groove 10 formed in the widthwise center of the absorbent body 6, and since urine can be absorbed by the entire absorbent body 6, urine leakage can be suppressed.

<Modification 2>
Next, a diaper 1 according to a second modification of the present embodiment will be described with reference to Figs. 8 to 9B. Fig. 8 is a plan view showing a schematic view of the diaper 1 according to the second modification in an extended state. Fig. 9A is an end view of the diaper 1 according to the second modification taken along line E-E in Fig. 8, and Fig. 9B is an end view of the diaper 1 according to the second modification taken along line F-F in Fig. 8.

In this modification, a top sheet 7 is bonded to the bottom of the groove 10 in order to guide urine to the skin surface side outside the groove 10. In FIG. 8, the adhesive area 101 between the top sheet 7 and the bottom of the groove 10 is shown surrounded by a dotted circle. In this modification, the adhesive regions 101 are formed at four locations. In the region where the top sheet 7 and the bottom of the groove 10 are not bonded, urine flows within the groove 10 on the non-skin side of the top sheet 7.

The diaper 1 according to this modification includes an adhesive region 101 in which the top sheet 7 is adhered to the bottom of the groove 10, and a region in which the top sheet 7 is not adhered to the bottom of the groove 10 (regions other than the adhesive region 101 in FIG. 8, hereinafter referred to as "non-adhesive regions"). The non-adhesive regions extend from the adhesive region 101 toward the skin-facing side of the absorbent 6. In the adhesive region 101, the space through which urine can flow in the groove 10 is narrowed, and the urine is guided to the skin-facing side of the absorbent 6 along the non-adhesive region extending from the adhesive region 101 toward the skin-facing side of the absorbent 6 outside the groove 10. In this way, the top sheet 7 between the adhesive region and the non-adhesive region extending to the skin-facing side of the absorbent 6 can be used as a guide portion. The urine guided to the skin-facing side of the top sheet 7 by the guide portion is absorbed from the skin-facing side of the absorbent 6. As a result, the diaper 1 of this modified example can prevent a large amount of urine from reaching the rear end of the groove 10, thereby suppressing urine leakage from the rear end of the diaper 1.

<Modification 3>
Next, a diaper 1 according to a third modification of the present embodiment will be described with reference to Figs. 10 to 11B. Fig. 10 is a plan view showing a schematic view of the diaper 1 according to the third modification in an extended state. Fig. 11A is an end view of the diaper 1 according to the third modification taken along line G-G in Fig. 10, and Fig. 11B is an end view of the diaper 1 according to the third modification taken along line H-H in Fig. 10.

In this modification, a plurality of adhesive regions 101L and 101R between the top sheet 7 and the bottom of the groove 10 are formed inside the groove 10 at predetermined intervals on the side of the back body region 1R than the urethral meatus corresponding region 12. As shown in FIG. 10, for example, four adhesive regions 101L and 101R are formed. The adhesive region 101L is provided on the left side within the groove 10, and the adhesive region 101R is provided on the right side within the groove 10. By narrowing the space in which urine can flow on the left side of the groove 10 by the adhesive area 101L, the urine flows from the adhesive area 101L to the non-adhesive area of the top sheet 7 and flows into the absorbent body 6 on the left side of the groove 10. Guided to the skin side. In addition, by narrowing the space in which urine can flow on the right side of the groove 10 by the adhesive area 101R, the urine can be transmitted from the adhesive area 101L to the non-adhesive area of the top sheet 7 to the absorbent body on the right side of the groove 10. It is guided to the skin side of 6. In this manner, in this modification, the adhesion regions 101L and 101R that are adjacent to each other in the longitudinal direction are alternately provided, and the adhesion regions 101L and 101R guide urine in different directions in the width direction. As a result, the diaper 1 according to the present modification can guide urine evenly on the left and right sides from the groove 10 formed in the widthwise central part of the absorbent body 6, and the urine can be absorbed by the entire absorbent body 6. This can prevent urine leakage.

<Modification 4>
Next, a diaper 1 according to a fourth modification of the present embodiment will be described with reference to Fig. 12. Fig. 12 is a plan view showing a diaper 1 according to the fourth modification in a stretched state. For the sake of explanation, the side sheets 8L, 8R and the elastic members 8EL, 8ER are not shown in Fig. 12.

In this modified example, the absorbent body 6 is formed with a plurality of grooves. More specifically, the absorbent body 6 is formed with a groove 11L (an example of a "first groove") located at the left end side in the width direction of the diaper 1, and a groove 11R (an example of a "second groove") located at the right end side in the width direction. The grooves 11L and 11R extend in the longitudinal direction and are parallel to each other. The grooves 11L and 11R each have a width of 40 to 50 mm and a length of 100 to 400 mm. In addition, the positions of the grooves 11L and 11R in the longitudinal direction are the same as the positions of the grooves 10 shown in FIG. 3.

In the diaper 1 according to this modification, protrusions 102a, 102b, 103a, and 103b are formed in the grooves 11L and 11R at predetermined intervals as an example of the guide portion. For example, three protrusions 102a and one protrusion 102b are disposed inside the groove 11L. The protrusion 102a is provided on the right side of the groove 11L, that is, on the widthwise center side. On the other hand, the protrusion 102b is provided on the left side of the groove 11L, that is, on the left end side in the width direction. The protrusion 102a provided on the center side in the width direction causes the urine flowing in the groove 11L to overflow to the center side in the width direction of the absorber 6, thereby guiding the urine toward the center side in the width direction. The protrusion 102b provided on the left end side in the width direction causes the urine flowing in the groove 11L to overflow to the left end side in the width direction of the absorber 6, thereby guiding the urine to the left end side in the width direction.

Three protrusions 103a and one protrusion 103b are disposed inside the groove 11R. The protrusion 103a is provided on the left side of the groove 11R, that is, on the widthwise center side. On the other hand, the protrusion 103b is provided on the right side in the groove 11R, that is, on the right end side in the width direction. The protrusion 103a provided on the widthwise center side causes the urine flowing in the groove 11R to overflow to the widthwise center side of the absorber 6, thereby guiding the urine toward the widthwise center side. The protrusion 103b provided on the left end side in the width direction causes the urine flowing in the groove 11R to overflow to the left end side in the width direction of the absorber 6, thereby guiding the urine to the right end side in the width direction.

In this manner, in the diaper 1 according to this modification, there are more protrusions 102a, 103a that guide urine toward the center in the width direction of the absorbent body 6 than there are protrusions 102b, 103b that guide urine toward the ends in the width direction of the absorbent body 6. As a result, the diaper 1 according to this modification can guide urine toward the center in the width direction of the absorbent body 6, and can absorb a relatively large amount of urine on the center side of the absorbent body 6, thereby suppressing urine leakage.

In this modified example, a protrusion is provided as an example of the guiding portion, but an adhesive region may be provided instead of the protrusion. In addition, also in this modification, there are grooves 10 and protrusions 10a in the widthwise central part of the absorbent body 6 as shown in FIG. may be formed.

<Modification 5>
Next, a diaper 1 according to modification 5 of the present embodiment will be described using FIG. 13. FIG. 13 is a plan view schematically showing a stretched state of the diaper 1 according to this modification. In addition, in FIG. 13, illustration of the side seats 8L, 8R and the elastic members 8EL, 8ER is omitted for explanation. In this modification, the protrusions 102b and 103b that guide urine toward the ends of the absorbent body 6 in the width direction are not provided, and the protrusions 102a and 103a that guide urine toward the center portion of the absorbent body 6 in the width direction are not provided. only. As a result, the diaper 1 according to the present modification can guide urine toward the central portion of the absorbent body 6 in the width direction, and can absorb a large amount of urine on the central portion side of the absorbent body 6. Can control urine leakage.

In this modification, a protrusion is provided as an example of a guide portion, but an adhesive region may be provided instead of the protrusion. Note that in this modification, a groove 10 and a protrusion 10a may be formed in the center of the absorbent body 6 in the width direction as shown in FIG. 3, etc., or a groove 10 and adhesive regions 101, 101L, 101R may be formed as shown in FIGS. 8 to 11B.

<Modification 6>
Next, a diaper 1 according to modification 6 of the present embodiment will be described using FIG. 14. FIG. 14 is a plan view schematically showing a stretched state of the diaper 1 according to this modification. The diaper 1 according to the present modification has first branch grooves 21L and 21R that branch from the groove 10 in a diagonal direction with respect to the longitudinal direction and toward the front body region 1F side, and first branch grooves 21L and 21R that branch from the groove 10 in a diagonal direction with respect to the longitudinal direction. and second branch grooves 22L, 22R branching toward the back body region 1R side. The first branch groove 21L extends diagonally toward the left side of the front body region 1F, and the first branch groove 21R extends diagonally toward the right side of the front body region 1F. Similarly, the second branch groove 22L extends diagonally to the left side of the back body region 1R, and the second branch groove 22R extends diagonally to the right side of the back body region 1R.

In this way, the diaper 1 may have first branch grooves 21L, 21R and second branch grooves 22L, 22R extending from the groove 10. With this configuration, the diaper 1 can prevent urine from leaking out from the rear end side of the absorbent 6 by dispersing urine flowing through the groove 10 in the width direction of the front body region 1F and the rear body region 1R.

In Embodiment 1 and its modifications, the grooves 10, 11L, 11R extend along the longitudinal direction, but in plan view, the grooves 10, 11L, 11R extend from several degrees to several tens of degrees from the longitudinal direction. It may extend in an oblique direction. Even if the grooves 10, 11L, and 11R extend diagonally, if the longitudinal component is longer than the widthwise component, it can be said that the grooves 10, 11L, and 11R extend in the longitudinal direction. Further, in the present embodiment and the modified examples, the grooves 10, 11L, and 11R extend linearly, but the grooves 10, 11L, and 11R may extend in a curved line.

Moreover, FIG. 15 is a diagram schematically showing a cross section cut in the width direction of the absorber 6 of the diaper 1 and the wearer's skin surface 30 in the wearing state. As shown in FIG. 15, when the diaper 1 is worn on the wearer so that the cross-sectional shape when cut in the width direction of the absorbent body 6 is U-shaped, the grooves 10 are separated from the wearer's skin surface. It is preferable to arrange the folding line at the fold position 31 in the direction.

Figure 16 is a schematic diagram showing a cross section of the absorbent body 6 of the diaper 1 in a width direction when the diaper 1 is worn, and the skin surface 30 of the wearer. As shown in Figure 16, when the diaper 1 is worn on a wearer so that the cross section of the absorbent body 6 in the width direction has a W-shape, the grooves 11L and 11R are positioned so as to be located at the fold position 32 in the direction away from the skin surface 30 of the wearer.

As shown in Figures 15 and 16, by arranging grooves at fold positions that are in a direction away from the skin surface 30 when the diaper is worn, it is possible to arrange the grooves at positions that form the bottom of the absorbent body 6 when viewed from the skin surface 30. This allows the diaper 1 to easily allow urine to flow into the grooves that are arranged at the bottom of the valley.

<Embodiment 2>
Next, a diaper 1 according to a second embodiment will be described. Note that the same constituent elements as those of the diaper 1 according to the first embodiment described above are given the same reference numerals, and the explanation thereof will be omitted.

Figure 17 is a plan view showing a schematic state of the diaper 1 according to this embodiment in an expanded state. The diaper 1 according to this embodiment has a plurality of fine grooves 104L, 104R extending from the inside of the groove 10 to the skin-facing side of the absorbent body 6. The fine groove 104L extends from the center of the width of the groove 10 toward the left of the rear body region 1R, and the fine groove 104R extends from the center of the width of the groove 10 toward the right of the rear body region 1R. The fine grooves 104L, 104R move urine flowing in the groove 10 to the skin-facing side outside the groove 10 by capillary action. The diaper 1 according to this embodiment moves urine flowing in the groove 10 to the outside of the groove 10, thereby preventing a large amount of urine from reaching the rear end of the groove 10 and suppressing urine leakage from the rear end of the diaper 1.

FIG. 18 is an end view of the diaper 1 according to the present embodiment taken along the line II shown in FIG. 17. In the diaper 1 according to this embodiment, the top sheet 7 includes two sheet members 7a and 7b stacked on each other. The sheet member 7a is arranged on the skin side, and the sheet member 7b is arranged on the non-skin side. For the sheet members 7a and 7b, a liquid-permeable woven fabric, non-woven fabric, porous film, or the like is used.

The sheet members 7a and 7b are bonded together by a joint 20. The sheet members 7a and 7b are joined by welding. The fine grooves 104L and 104R are embossed grooves formed by the joint portions that join the sheet members 7a and 7b. When forming the embossed grooves, welding is performed by applying heat to the area that will become the joint 20 while pressing the sheet member 7a placed on the skin side toward the sheet member 7b placed on the non-skin side. At the same time, the sheet members 7a and 7b are pushed out in the direction toward the non-skin side. As a result, a portion of the fine grooves 104L and 104R that overlap the groove 10 when viewed in the thickness direction can be dropped into the groove 10 and placed inside the groove 10.

As shown in FIG. 17, adjacent microgrooves 104L and 104R in the longitudinal direction extend in different width directions, allowing urine to move in different width directions. As a result, the diaper 1 according to this embodiment allows urine to move evenly to the left and right from the groove 10 formed in the center of the absorbent body 6 in the width direction, and urine can be absorbed by the entire absorbent body 6, thereby preventing urine leakage.

Note that the fine grooves 104L and 104R may be embossed grooves formed by compressing a single sheet of bulky nonwoven fabric. In addition, in order to form the fine grooves 104L and 104R, the areas formed into a film by thermocompression bonding or the areas coated with hot melt have lower liquid permeability than the surrounding areas, resulting in a more excellent effect. play.

In this embodiment, a test was conducted to verify whether leakage could be suppressed by changing the number of fine grooves and the interval between fine grooves. In this test, 12 types of diapers, samples 1 to 12, were made. The procedure of the test method is the same as the test in Embodiment 1 above.

FIG. 19 is a table showing the results of this test. The columns “1” to “12” in FIG. 19 are the sample numbers of the diapers produced in this test. Moreover, the item "Groove length (mm)" in FIG. 19 indicates the length of the groove of the diaper of each sample. The item "Number of fine grooves" in FIG. 19 indicates the total number of fine grooves in the diaper of each sample. The item "fine groove spacing (mm)" in FIG. 19 indicates the spacing between fine grooves that are adjacent to each other in the longitudinal direction on one side of the groove in the diaper of each sample. The item "Longitudinal flow distance" in FIG. 19 indicates the distance that the artificial urine reaches from the position where the artificial urine is injected into the diaper to the rear body region side in the longitudinal direction of the diaper. The item "absorption amount (g)" in FIG. 19 is the amount (g) of artificial urine absorbed by each sample diaper. The item "Leakage control" in Figure 19 indicates whether or not each sample diaper was able to suppress leakage. "○" in "Leakage control" indicates that the diaper in that column was able to suppress leakage. An "x" in "Leakage Suppression" indicates that the diaper in that column was unable to suppress leakage. In addition, in this test, a case where artificial urine leaked from the diaper during the second cycle of injection of artificial urine was considered to be a failure to suppress leakage. Note that the fine groove has a width of 2 mm, a depth of 2 mm, and a length of 50 mm in plan view. The fine grooves extend from the center side in the width direction of the diaper in a diagonal direction of 30 degrees with respect to the extending direction of the grooves (the longitudinal direction of the diaper 1). The fine grooves were arranged in equal numbers on both the left and right sides of the groove. Moreover, the structure of the diaper of each other sample is the same as that of the diaper of each sample in the said embodiment.

As shown in the "absorption amount (g)" section of the table in Figure 19, the diaper absorbs a large amount of urine, which means that the diaper guides urine out of the grooves, allowing the entire absorbent body to efficiently absorb urine. This means that the water was absorbed in a large amount of water, resulting in an effective leakage control effect. Furthermore, as shown in the table of FIG. 19, it has been found that leakage can be suppressed by setting the interval between adjacent fine grooves in the longitudinal direction on one side of the groove to be 20 mm or less. Therefore, the interval between the fine grooves 104L adjacent to each other in the longitudinal direction is preferably 20 mm or less. Moreover, the interval between the fine grooves 104R adjacent to each other in the longitudinal direction is preferably 20 mm or less.

<Modification>
Next, a diaper 1 according to a modification of the present embodiment will be described with reference to Fig. 20. Fig. 20 is a plan view showing a diaper 1 according to this modification in a stretched state. For the sake of explanation, the side sheets 8L, 8R and the elastic members 8EL, 8ER are not shown in Fig. 20.

20, in this modified example, the absorbent body 6 is formed with grooves 11L and 11R. The diaper 1 according to this modified example has a plurality of fine grooves 105a and 105b extending from the inside of the groove 11L to the skin-facing side of the absorbent body 6. The fine groove 105a extends from the widthwise center of the groove 11L toward the right side of the rear body region 1R, i.e., toward the widthwise center, and the fine groove 105b extends from the widthwise center of the groove 11L to the left side of the rear body region 1R, i.e., toward the widthwise left end side. The diaper 1 according to this modified example also has a plurality of fine grooves 106a and 106b extending from the inside of the groove 11R to the skin-facing side of the absorbent body 6. Microgroove 106a extends from the widthwise center of groove 11R toward the left side of rear body region 1R, i.e., toward the widthwise center, and microgroove 106b extends from the widthwise center of groove 11R toward the right side of rear body region 1R, i.e., toward the widthwise right end. Note that microgrooves 105a, 105b, 106a, and 106b are embossed grooves, just like microgrooves 104L and 104R.

Here, the microgrooves 105a and 106a move urine to the widthwise center side of the absorbent body 6 by capillary action, and the microgrooves 105b and 106b move urine to the widthwise end side of the absorbent body 6 by capillary action. In the diaper 1 according to this modification, there are more microgrooves 105a and 106a that move urine to the widthwise center side of the absorbent body 6 than there are microgrooves 105b and 106b that move urine to the widthwise end side of the absorbent body 6. As a result, the diaper 1 according to this modification can guide urine to the widthwise center side of the absorbent body 6, and can absorb a relatively large amount of urine on the center side of the absorbent body 6, thereby suppressing urine leakage. Note that it is also possible to provide only the microgrooves 105a and 106a that move urine to the widthwise center side of the absorbent body 6 without providing the microgrooves 105b and 106b that move urine to the widthwise end side of the absorbent body 6.

<Embodiment 3>
Next, a diaper 1 according to a third embodiment will be described. Note that the same constituent elements as those of the diaper 1 according to the first and second embodiments described above are given the same reference numerals, and the explanation thereof will be omitted.

FIG. 21 is a plan view schematically showing the diaper 1 according to the present embodiment in an expanded state. The diaper 1 according to the present embodiment includes guide paths 107L and 107R that branch from the groove 10 on the side of the rear body region 1R with respect to the urethral opening corresponding region 12 and guide urine to the skin surface side outside the groove 10. The guide path 107L is connected to the groove 10 and extends to the left of the rear body region 1R. The guide path 107R is connected to the groove 10 and extends toward the right side of the rear body region 1R. In this embodiment, four guide routes 107L and 107R are each formed. One guide route 107L, 107R may be formed, or only one guide route 107L, 107R may be formed.

Figure 22 is an end view of the diaper 1 according to this embodiment cut along the line J-J shown in Figure 21. The guide path 107L is formed so as to become shallower from the urethral opening corresponding region 12 side shown in Figure 21 toward the rear body region 1R side. In this embodiment, the guide path 107L is formed in an inclined shape so as to become shallower toward the rear body region 1R side. The guide path 107L may be formed in a stepped shape so as to become shallower toward the rear body region 1R side. Although not shown, the guide path 107R is also formed so as to become shallower toward the rear body region 1R side. The absorbent body 6 in which the guide paths 107L and 107R are formed can be manufactured by stacking fibers on a forming drum having a molding die formed on the outer circumferential surface corresponding to the molding pattern of the guide paths 107L and 107R.

The guide paths 107L and 107R may be formed in a stepped shape. Also, by forming the guide paths 107L and 107R in a sloped shape, it is easier to regulate the direction in which urine flows.

In the diaper 1 according to the present embodiment, urine flowing in the groove 10 can be moved to the skin surface side outside the groove 10 by branching into the guide paths 107L and 107R, and can be absorbed by the absorber 6. . Thereby, the diaper 1 according to the present embodiment can prevent a large amount of urine from reaching the rear end of the groove 10, and can suppress urine from leaking from the rear end of the diaper 1.

<Modification 1>
Next, the diaper 1 according to the first modification of the present embodiment will be described with reference to Fig. 23. Fig. 23 is a plan view showing the diaper 1 according to the first modification in an expanded state. In the diaper 1 according to the first modification, the distal ends of the guide paths 107L and 107R are formed in a sector shape. By forming the distal ends of the guide paths 107L and 107R in this manner, the urine outlets in the respective guide paths are widened, and urine can be guided in directions other than the extension direction of each guide path. As a result, the diaper 1 can diffuse urine throughout the entire absorbent body 6, and absorb and retain urine throughout the entire absorbent body 6, thereby suppressing urine leakage.

<Modification 2>
Next, a diaper 1 according to a second modification of the present embodiment will be described using FIG. 24. FIG. 24 is a plan view schematically showing a stretched state of the diaper 1 according to this modification. In the diaper 1 according to this modification, the tip portions of the guide paths 107L and 107R are branched to form a branch portion 108. The branch portion 108 extends in a direction perpendicular to the direction in which the guide paths 107L and 107R extend. Note that the branch portion 108 may extend diagonally with respect to the direction in which the guide paths 107L and 107R extend. This branch portion 108 may be formed in a slope shape like the guide paths 107L and 107R, or may be formed in a step shape. By forming the branch portions 108 at the tips of the guide paths 107L and 107R in this manner, urine can be guided through each branch portion 108 in a direction other than the direction in which each guide path extends. Thereby, the diaper 1 can diffuse urine throughout the absorbent body 6 and absorb and retain urine in the entire absorbent body 6, so that leakage of urine can be suppressed.

Note that the configurations in the above embodiments and modified examples can be combined as appropriate. For example, the diaper 1 may include guide portions for the protrusions 10a, 100L, 100R, adhesive regions 101L, 101R, and fine grooves 104L, 104R, or may include these guide portions and guide paths 107L, 107R. You can leave it there.

In this embodiment, a tape-type disposable diaper for adults (for nursing care) is exemplified, but the form disclosed in this application is not limited thereto, and may be, for example, a tape-type disposable diaper for children or infants, or a pants-type disposable diaper or urine pad for adults, children, or infants.

1: Diaper 1F: Front body region 1R: Back body region 2F: Front patch 2L: Tape 2R: Tape 3BL: 3D gather 3BR: 3D gather 3R: Waist gather 4: Cover sheet 4SR: Elastic member 4SL: Elastic member 5: Back sheet 6: Absorbent body 7: Top sheet 8EL: Elastic member 8ER: Elastic member 8L: Side sheet 8R: Side sheet 9ER: Elastic member 10: Groove 10a: Projection 11L: Groove 11R: Groove 12: Urethral opening corresponding region 21L: First branch groove 21R: First branch groove 22L: Second branch groove 22R: Second branch groove 30: Skin surface 31: Fold position 32: Fold position 101 : Adhesive region 104L: Microgroove 104R: Microgroove 107L: Branch path 107R: Branch path 108: Branch portion

Claims (9)

An absorbent article having a longitudinal direction and a width direction that are orthogonal to each other,
A liquid-permeable top sheet placed on the skin side,
a liquid-impermeable backsheet disposed on the non-skin side that is opposite to the skin side;
an absorbent body disposed between the top sheet and the back sheet;
a groove formed on the skin side of the absorbent body, extending in the longitudinal direction, and allowing urine excreted by the wearer to flow in the longitudinal direction;
a guide portion that guides the urine to the skin surface side outside the groove;
an adhesive area where the topsheet is adhered to the bottom of the groove;
a non-adhesive region in which the top sheet is not adhered to the bottom of the groove and extends from the adhesive region toward the skin side of the absorbent body;
Equipped with
The guide portion is the top sheet between the adhesive region and the non-adhesive region extending toward the skin side of the absorbent body,
The guiding portion is formed in plurality,
Some of the plurality of guide parts are provided on the one end side in the width direction, and other parts of the plurality of guide parts are provided on the other end side in the width direction,
Absorbent articles. The groove is formed in a central portion of the absorbent body in the width direction,
The absorbent article according to claim 1 . A plurality of guide portions are formed at predetermined intervals,
The guide portions adjacent in the longitudinal direction guide the urine in different directions in the width direction.
The absorbent article according to claim 2 . The guide portions adjacent to each other in the longitudinal direction are provided on one end side in the width direction and the other end side in the width direction,
The absorbent article according to any one of claims 1 to 3. The wearer has a front body region located on the abdomen side of the wearer, a crotch region located on the crotch region, and a back body region located on the back side of the wearer in the wearing state,
a first branch groove that branches from the groove in a diagonal direction with respect to the longitudinal direction and toward the front body region;
a second branch groove that branches from the groove in a diagonal direction with respect to the longitudinal direction and toward the rear body region;
The absorbent article according to any one of claims 1 to 4 , comprising: When the absorbent article is worn by a wearer so that the cross-sectional shape in the width direction of the absorbent body is U-shaped, the groove is arranged to be located at a fold position in a direction away from the skin surface of the wearer.
6. The absorbent article according to any one of claims 1 to 5 . A plurality of the grooves are formed in the absorbent body,
The plurality of grooves include a first groove arranged on one end side in the width direction and a second groove arranged on the other end side in the width direction.
The absorbent article of claim 1 . The guide portion is formed at a predetermined interval in correspondence with the first groove and the second groove,
The one end side in the width direction is a center side in the width direction,
The other end side in the width direction is an end side in the width direction,
the number of the guide portions provided on the central portion side in the width direction and guiding the urine to the central portion side is greater than the number of the guide portions provided on the end portions side in the width direction of the absorbent body and guiding the urine to the end portions .
The absorbent article of claim 7 . When the absorbent article is worn by a wearer so that the cross-sectional shape in the width direction of the absorbent body is W-shaped, the first groove and the second groove are arranged to be located at a fold position in a direction away from the skin surface of the wearer.
9. The absorbent article according to claim 7 or 8 .

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