JP7459677B2 - absorbent articles - Google Patents

Description

The present invention relates to an absorbent article.

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.

Japanese Patent Application Publication No. 2017-189243

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, an object of the present invention is to provide an absorbent article that can suppress urine leakage.

In order to solve the above problems, the absorbent article according to the present invention includes grooves formed on the skin side of the absorber and a plurality of fine grooves that move urine from inside the grooves by capillary action.

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 grooves that extend in the longitudinal direction and allow urine excreted by the wearer to flow in the longitudinal direction; A plurality of fine grooves that are moved from the inside of the groove toward the skin surface side.

The top sheet may have two sheet members laminated together, and the microgrooves may be embossed grooves.

The groove may be formed in the center of the absorbent body in the width direction, and the fine grooves adjacent in the longitudinal direction may move the urine in different directions in the width direction.

The absorbent body may have a plurality of grooves formed therein, and the plurality of grooves may 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 microgrooves that move the urine toward the center in the width direction may be provided in greater numbers than the microgrooves that move the urine toward the end portions in the width direction of the absorbent body.

The above absorbent article may further include a guide portion that guides the urine to the skin surface side outside the groove.

The above absorbent article can suppress urine leakage.

FIG. 1 is a perspective view of a diaper according to a first embodiment. 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 the diaper according to Embodiment 1. FIG. 4B is an end view of the diaper according to the first embodiment. FIG. 5 is a table showing test results in which the leakage suppression effect was verified 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 a second modification of the first embodiment. FIG. 9B is an end view of a diaper according to Modification 2 of Embodiment 1. FIG. FIG. 10 is a plan view of a diaper according to Modification 3 of Embodiment 1. FIG. 11A is an end view of a diaper according to Modification 3 of Embodiment 1. FIG. 11B is an end view of the diaper according to Modification 3 of Embodiment 1. FIG. 12 is a plan view of a diaper according to a fourth modification of the first embodiment. 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 modification 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 showing a schematic cross section of the absorbent body in the width direction in the worn state and the skin surface of the wearer. FIG. 17 is a plan view of a 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 modified example 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 a diaper according to the third embodiment. 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 Modification 2 of Embodiment 3.

Below, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are examples, and the present invention is not limited to the configurations of these embodiments.

<Embodiment 1>
In this embodiment, in a tape-type disposable diaper (an example of an "absorbent article" in the present application, hereinafter simply referred to as a "diaper"), the direction connecting the front body (front body region 1F shown in Figs. 1 and 3) arranged opposite the wearer's abdomen and the rear body (rear body region 1R shown in Figs. 1 and 3) arranged opposite the back is defined as the longitudinal direction, and the direction perpendicular to the longitudinal direction is defined as the width direction. Between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction), a crotch part arranged under the wearer's crotch (opposed to the crotch) is located. In addition, when the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is defined as the skin-facing side, and the opposite side of the skin-facing side (the outer side when worn) is defined as the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is defined as the thickness direction. The thickness direction is perpendicular to both the longitudinal direction and the width direction. In addition, a plan view refers to a view from the thickness direction. Also, the left and right directions when viewed from the back body region toward the front body region are referred to 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 this order on the wearer-facing surface of the cover sheet 4. The back sheet 5, the absorbent body 6, and the top sheet 7 are all sheet-like members having a substantially rectangular appearance, and are laminated in this order on the cover sheet 4 with their longitudinal directions coinciding with the longitudinal direction of the cover sheet 4. The back sheet 5 is
The top sheet 7 is disposed on the non-skin-facing side, which is the opposite side to the skin-facing side. The back sheet 5 is a sheet formed of a liquid-impermeable thermoplastic resin material to suppress leakage of excrement, similar to the cover sheet 4. The back sheet 5 is preferably made of a material that is also moisture-permeable in order to suppress stuffiness when worn. The top sheet 7 is a sheet-like member 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 the material 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.

The elastic member 9ER for forming the waist gather 3R described above is provided between the back sheet 5 and the top sheet 7 at a position further back than the end of the absorbent body 6. The elastic member 9ER is provided between the back sheet 5 and the top sheet 7 with its longitudinal direction, which is the stretch direction, oriented in the left-right direction of the diaper 1. Therefore, when the tapes 2L, 2R provided on both the left and right sides of the elastic member 9ER are attached to the front patch 2F on the abdominal side of the wearer, the elastic member 9ER exerts a contractile force to bring the diaper 1 into close contact with the wearer and prevent the formation of a gap between the diaper 1 and the wearer's abdominal circumference.

The absorbent body 6 absorbs water into the gaps between short fibers of cellulose fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers made of synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate that have been subjected to hydrophilic treatment. It has a structure that holds particulate absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a crosslinked structure that can absorb and retain water. Therefore, in the absorber 6, the volume change of the absorbent resin before and after absorbing liquid is basically performed within the short fibers that hold the absorbent resin in the gaps. Therefore, when looking down on the entire absorber 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 core 6 may include 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 as the core wrap sheet.

In this embodiment, SAP particles refer to a resin composition containing SAP in a granular form. The term "resin composition containing SAP" as used herein is a concept that encompasses both a composition consisting of SAP alone and a composition that contains SAP as the main component and contains other substances to the extent that they do not adversely affect water absorption. Examples of "other substances" include additives (such as surface modifiers added to make the particle surface hydrophobic), unreacted monomers remaining during the synthesis of SAP, etc.

FIG. 3 is a plan view schematically showing the diaper 1 in an expanded state. The diaper 1 includes grooves 10 formed on the skin side (top sheet 7 side) of the absorbent body 6. The grooves 10 extend in the longitudinal direction of the diaper 1 and are provided to allow urine excreted by the wearer to flow in the longitudinal direction and diffuse throughout the absorbent body 6 . For example, the groove 10 has a width of 40 to 50 mm and a length of 100 to 400 mm. Further, the groove 10 is located at the center in the width direction of the diaper 1 and has both ends in the longitudinal direction between the front body region 1F and the back body region 1R.The groove 10 corresponds to the urethral opening of the wearer. It is formed including a region 12 (hereinafter referred to as "urethral opening corresponding region 12"). This makes it easier for urine excreted by the wearer to flow into the grooves 10. Note that the center position of the groove 10 in the longitudinal direction is closer to the front body region 1F than the center of the absorbent core 6. Note that the groove 10 may be formed to penetrate the absorbent core of the absorbent body 6.

The urethral opening corresponding area 12 is present in the range from the central area of the groove 10 in the longitudinal direction to the front. The urethral opening corresponding area 12 is the area where the wearer's urethral opening abuts against the top sheet 7, or the area opposite the wearer's urethral opening, and is the urination position. The urethral opening corresponding area 12 is determined taking into consideration individual differences in the position of the wearer's urethral opening, differences between men and women, and slight positional deviations of the diaper 1 that occur for each wearer.

Fig. 4A is an end view of the diaper 1 cut along line A-A in Fig. 3. Fig. 4B is an end view of the diaper 1 cut along line B-B in Fig. 3. In this embodiment, the grooves 10 are formed as non-penetrating types that do not penetrate the absorbent body 6 in the thickness direction. As shown in Figs. 3 and 4B, the diaper 1 according to this embodiment includes protrusions 10a (an example of a "guiding portion") arranged inside the grooves 10. The protrusions 10a are formed integrally with the absorbent body 6. For example, an absorbent body 6 in which the grooves 10 and the protrusions 10a are formed integrally 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 grooves 10 and the protrusions 10a.

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 "guiding 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 skin surface side outside the groove 10. 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.

The diaper 1 according to this embodiment also includes three-dimensional gathers 3BL, 3BR. The three-dimensional gathers 3BL, 3BR prevent urine from leaking sideways from the widthwise ends of the diaper 1. The three-dimensional gathers 3BL, 3BR can effectively prevent urine from leaking sideways after it is guided by the protrusions 10a to the skin-facing side outside the grooves 10.

The diaper 1 according to this embodiment also includes leg gathers 3AL, 3AR. The leg gathers 3AL, 3AR prevent gaps from forming between the diaper 1 and the wearer's thighs, and suppress side leakage of urine from the widthwise ends of the diaper 1. The three-dimensional gathers 3BL, 3BR can effectively suppress side leakage of urine guided by the protrusions 10a to the skin-facing side of the grooves 10.

In this embodiment, three protrusions 10a are arranged at equal intervals behind the urethral opening corresponding region 12 (on the rear body region 1R side). The spacing and number of protrusions 10a can be set as appropriate depending on the absorption amount and size of the diaper 1 as a whole, whether it is for adults or infants, etc. Only one protrusion 10a may be formed.

Here, for example, it is known that the amount of urine voided by a care recipient in one urination 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 can be adjusted by adjusting the ratio of the cross-sectional area of the protrusion 10a to the cross-sectional area of the groove 10 in the width direction of the diaper 1. In this embodiment, a test was conducted to verify whether leakage could be suppressed by changing the cross-sectional area ratio of the groove and the protrusion. In this test, seven types of diapers, samples 1 to 7, were created. The procedure of the test method is as follows. First, the diaper is placed in a state in which it is inclined at 60 degrees in the longitudinal direction so that the front body region is upward and the rear body region is downward. Next, 200 ml of artificial urine is poured from a burette into the urethral opening corresponding area of the diaper at a rate of 10 ml/sec. Then, 10 minutes later, 200 ml of artificial urine is poured in the same manner. The artificial urine is repeatedly injected until it leaks out of the diaper. The artificial urine was made 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 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 was found that urine leakage can be suppressed by setting the ratio of the cross-sectional area of the protrusions to the cross-sectional area of the grooves to 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 protrusions 10a to the cross-sectional area of the grooves 10 when cut in the width direction is 0.3 or more and 0.8 or less. With the diaper 1 having this configuration, urine leakage can be suppressed. In addition, the ratio of the cross-sectional areas of the protrusions 10a to the grooves 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, a diaper with this ratio has an absorption capacity of 500 g or more, and can absorb and retain more urine. The diaper of sample 1 has a ratio of "1" and is configured such that the grooves are divided in the longitudinal direction by the protrusions. Although the diaper of sample 1 can 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 cross-sectional area of the groove 10 is greater than 0.8, there is a risk that urine will be spread too far in the width direction, so it is preferable to set this ratio to 0.8 or less.

<Modification 1>
Next, the diaper 1 according to the first modification of the present embodiment will be described with reference to Fig. 6 to Fig. 7B. Fig. 6 is a plan view showing the diaper 1 according to the first modification in a stretched state. Fig. 7A is an end view of the diaper 1 according to the first modification taken along line CC shown in Fig. 6, and Fig. 7B is an end view of the diaper 1 according to the first modification taken along line D-D shown in Fig. 6.

In this modification, a plurality of protrusions are formed inside the groove 10 at predetermined intervals closer to the rear body region 1R than the urethral opening corresponding region 12. As shown in FIG. 6, for example, four protrusions 100L and 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 causes the urine flowing in the groove 10 to overflow to the left, thereby guiding the urine to the outer left side of the groove 10 toward the skin surface side. The protrusion 100R provided on the right side causes the urine flowing in the groove 10 to overflow to the right, thereby guiding the urine to the right outer side of the groove 10 toward the skin surface side. In this manner, in this modification, the protrusions 100L and 100R that are adjacent in the longitudinal direction 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 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 modified example, the top sheet 7 is adhered to the bottom of the groove 10 in order to guide urine to the outer skin-facing side of the groove 10. In FIG. 8, the adhesion area 101 between the top sheet 7 and the bottom of the groove 10 is shown surrounded by a dotted circle. In this modified example, four adhesion areas 101 are formed. In the area where the top sheet 7 and the bottom of the groove 10 are not adhered, urine flows inside the groove 10, which is the non-skin-facing 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, the adhesion regions 101L, 101R between the top sheet 7 and the bottom of the groove 10 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. 10, for example, four adhesion regions 101L, 101R are formed. The adhesion region 101L is provided on the left side of the groove 10, and the adhesion region 101R is provided on the right side of the groove 10. The adhesion region 101L narrows the space through which urine can flow on the left side of the groove 10, so that the urine is guided from the adhesion region 101L through the non-adhesive region of the top sheet 7 to the skin side of the absorbent 6 on the left side of the groove 10. In addition, the adhesion region 101R narrows the space through which urine can flow on the right side of the groove 10, so that the urine is guided from the adhesion region 101L through the non-adhesive region of the top sheet 7 to the skin side of the absorbent 6 on the right side of the groove 10. In this manner, in this modification, adjacent adhesive regions 101L, 101R are provided alternately in the longitudinal direction, and the adhesive regions 101L, 101R guide urine in different widthwise directions. As a result, the diaper 1 according to this modification can guide urine evenly to the left and right from the groove 10 formed in the widthwise center of the absorbent body 6, and the entire absorbent body 6 can absorb urine, thereby preventing urine leakage.

<Modification 4>
Next, the diaper 1 according to the fourth modification of the present embodiment will be described with reference to Fig. 12. Fig. 12 is a plan view showing the 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 omitted from the illustration.

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 way, in the diaper 1 according to the present modification, urine is guided toward the central portion of the absorbent body 6 in the width direction rather than through the projections 102b and 103b, which guide urine toward the end portions of the absorbent body 6 in the width direction. There are more protrusions 102a and 103a provided. As a result, the diaper 1 according to this modification can guide urine toward the central portion of the absorbent body 6 in the width direction, and absorb a relatively large amount of urine on the central portion side of the absorbent body 6. This can prevent 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 a fifth modified example of the present embodiment will be described with reference to Fig. 13. Fig. 13 is a plan view showing a schematic state of the diaper 1 according to this modified example in an expanded state. For the sake of explanation, the side sheets 8L, 8R and the elastic members 8EL, 8ER are omitted from Fig. 13. In this modified example, the protrusions 102b, 103b for guiding urine are not provided on the end portions of the absorbent body 6 in the width direction, and only the protrusions 102a, 103a for guiding urine are provided on the central portion of the absorbent body 6 in the width direction. As a result, the diaper 1 according to this modified example can guide urine to 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, 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 6>
Next, a diaper 1 according to a sixth modified example of the present embodiment will be described with reference to Fig. 14. Fig. 14 is a plan view showing a schematic view of the diaper 1 according to the sixth modified example in an extended state. The diaper 1 according to the sixth modified example includes first branch grooves 21L, 21R branching from the groove 10 in a diagonal direction with respect to the longitudinal direction toward the front body region 1F, and second branch grooves 22L, 22R branching from the groove 10 in a diagonal direction with respect to the longitudinal direction toward the rear body region 1R. The first branch groove 21L extends toward the diagonal left side of the front body region 1F, and the first branch groove 21R extends toward the diagonal right side of the front body region 1F. Similarly, the second branch groove 22L extends toward the diagonal left side of the rear body region 1R, and the second branch groove 22R extends toward the diagonal right side of the rear 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 the first embodiment and its modified examples, the grooves 10, 11L, and 11R extend along the longitudinal direction, but in a plan view, the grooves 10, 11L, and 11R may extend in an oblique direction inclined by several degrees to several tens of degrees from the longitudinal direction. Even if the grooves 10, 11L, and 11R extend in an oblique direction, they can be said to extend in the longitudinal direction as long as the longitudinal component is longer than the width component. In the present embodiment and its modified examples, the grooves 10, 11L, and 11R extend in a straight line, but the grooves 10, 11L, and 11R may extend in a curved line.

Figure 15 is a schematic diagram showing a cross section of the absorbent body 6 of the diaper 1 in a worn state, cut in the width direction, and the skin surface 30 of the wearer. As shown in Figure 15, when the diaper 1 is worn on a wearer, it is desirable to position the groove 10 at the fold position 31 in the direction away from the skin surface of the wearer so that the cross section of the absorbent body 6 cut in the width direction has a U-shape.

Moreover, FIG. 16 is a diagram schematically showing a cross section cut in the width direction of the absorber 6 of the diaper 1 in the wearing state and the wearer's skin surface 30. As shown in FIG. 16, when the diaper 1 is worn on the wearer so that the cross-sectional shape in the width direction of the absorbent body 6 is W-shaped, the grooves 11L and 11R are directed away from the wearer's skin surface 30. It is arranged so as to be located at the fold position 32 of.

As shown in FIGS. 15 and 16, by arranging the grooves at the fold positions in the direction away from the skin surface 30 in the worn state, the grooves are arranged at positions where the absorber 6 becomes the valley bottom when viewed from the skin surface 30. Something happens. Thereby, the diaper 1 can easily allow urine to flow into the grooves located at the bottoms of the troughs.

<Embodiment 2>
Next, a diaper 1 according to a second embodiment will be described. Note that the same components as those of the diaper 1 according to the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted.

FIG. 17 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 a plurality of fine grooves 104L and 104R extending from the inside of the groove 10 toward the skin side of the absorber 6. The fine groove 104L extends from the widthwise central portion of the groove 10 to the left on the back body region 1R side, and the fine groove 104R extends from the widthwise central portion of the groove 10 to the right side on the back body region 1R side. The fine grooves 104L and 104R move urine flowing in the groove 10 to the skin surface side outside the groove 10 by capillary action. The diaper 1 according to the present embodiment prevents a large amount of urine from reaching the rear end of the groove 10 by moving the urine flowing inside the groove 10 to the outside of the groove 10. Can prevent urine leakage.

Figure 18 is an end view of the diaper 1 according to this embodiment cut along line I-I shown in Figure 17. In the diaper 1 according to this embodiment, the top sheet 7 has two sheet members 7a and 7b laminated together. The sheet member 7a is disposed on the skin-facing side, and the sheet member 7b is disposed on the non-skin-facing side. The sheet members 7a and 7b are made of liquid-permeable woven fabric, nonwoven fabric, porous film, etc.

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.

Moreover, as shown in FIG. 17, since the fine grooves 104L and 104R that are adjacent in the longitudinal direction extend in different directions in the width direction, urine can be moved in different directions in the width direction. As a result, the diaper 1 according to the present embodiment can move urine equally from 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.

The microgrooves 104L and 104R may be embossed grooves formed by squeezing a sheet of bulky nonwoven fabric. In addition, the areas that are turned into a film by thermocompression to form the microgrooves 104L and 104R or the areas where hot melt is applied have lower liquid permeability than the surrounding areas, providing better performance.

In this embodiment, a test was conducted to verify whether leakage could be suppressed by changing the number of microgrooves and the spacing between the microgrooves. In this test, 12 types of diapers, samples 1 to 12, were created. The test procedure was 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 FIG. 19, a diaper's high urine absorption rate means that the diaper guides urine out of the grooves, thereby efficiently absorbing the urine throughout the absorbent, resulting in the effect of suppressing leakage. Also, as shown in the table in FIG. 19, it has been found that leakage can be suppressed by setting the distance between adjacent microgrooves in the longitudinal direction on either the left or right side of the groove to 20 mm or less. For this reason, it is preferable that the distance between adjacent microgrooves 104L in the longitudinal direction be 20 mm or less. Also, it is preferable that the distance between adjacent microgrooves 104R in the longitudinal direction be 20 mm or less.

<Modified example>
Next, a diaper 1 according to a modification of this embodiment will be described using FIG. 20. FIG. 20 is a plan view schematically showing a stretched state of the diaper 1 according to this modification. In addition, in FIG. 20, illustration of the side seats 8L, 8R and the elastic members 8EL, 8ER is omitted for explanation.

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 fine grooves 105a and 106a move urine toward the widthwise central portion of the absorbent body 6 by capillary action, and the fine grooves 105b and 106b move urine toward the widthwise end portions of the absorbent body 6 by capillary action. move it. In the diaper 1 according to this modification, the micro grooves 105a move urine toward the center of the absorbent body 6 in the width direction rather than the micro grooves 105b and 106b that move urine toward the ends of the absorbent core 6 in the width direction. , 106a are provided in greater numbers. As a result, the diaper 1 according to this modification can guide urine toward the central portion of the absorbent body 6 in the width direction, and absorb a relatively large amount of urine on the central portion side of the absorbent body 6. This can prevent urine leakage. Note that the micro grooves 105b and 106b for moving urine are not provided at the ends of the absorbent body 6 in the width direction, but only the micro grooves 105a and 106a for moving urine are provided at the center side of the absorber 6 in the width direction. It's okay.

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

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

FIG. 22 is an end view of the diaper 1 according to the present embodiment taken along the line JJ shown in FIG. 21. The guide path 107L is formed so as to become shallower from the urethral opening corresponding region 12 side toward the back body region 1R side shown in FIG. 21. In this embodiment, the guide path 107L is formed in an inclined shape so as to become shallower toward the back body region 1R side. Note that the guide path 107L may be formed in a step-like manner so as to become shallower toward the back body region 1R side. Further, although not shown, the guide path 107R is similarly formed to become shallower toward the back body region 1R side. The absorbent body 6 in which the guide paths 107L and 107R are formed can be manufactured by laminating fibers on a forming drum whose outer circumferential surface is formed with a mold 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, the diaper 1 according to the second modification of the present embodiment will be described with reference to FIG. 24. FIG. 24 is a plan view showing a schematic diagram of the diaper 1 according to the second modification in an extended state. In the diaper 1 according to the second modification, the tips of the guide paths 107L and 107R are branched to form the branch portions 108. The branch portions 108 extend in a direction perpendicular to the extension direction of the guide paths 107L and 107R. The branch portions 108 may extend in an oblique direction with respect to the extension direction of the guide paths 107L and 107R. The branch portions 108 may be formed in a slope shape like the guide paths 107L and 107R, or may be formed in a step shape. In this way, by forming the branch portions 108 at the tips of the guide paths 107L and 107R, urine can be guided through the branch portions 108 in a direction other than the extension direction of each guide path. This allows the diaper 1 to diffuse urine throughout the entire absorbent body 6, thereby allowing the urine to be absorbed and retained throughout the entire absorbent body 6, thereby preventing urine leakage.

The configurations in the above-mentioned embodiments and modified examples can be combined as appropriate. For example, the diaper 1 may have guide portions of the protrusions 10a, 100L, 100R or the adhesive regions 101L, 101R and microgrooves 104L, 104R, or may have these guide portions and guide paths 107L, 107R.

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 area 1R: Back body area 2F: Front patch 2L: Tape 2R: Tape 3BL: Three-dimensional gathers 3BR: Three-dimensional gathers 3R: Waist gathers 4: Cover sheet 4SR: Elastic member 4SL: Elastic member 5: Back Sheet 6: Absorber 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 area 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 area 104L: Micro groove 104R: Micro groove 107L: Branch route 107R: Branch route 108: Branch

Claims (6)

An absorbent article having a longitudinal direction and a width direction perpendicular to each other,
A liquid-permeable top sheet disposed on the skin side;
A liquid-impermeable back sheet arranged on a non-skin-facing side opposite to the skin-facing 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 plurality of fine grooves formed in the top sheet, extending from inside the grooves to the skin side of the absorbent body, and moving the urine from inside the grooves to the skin side by capillary action;
An absorbent article comprising: The top sheet has two sheet members laminated together,
The fine groove is an embossed groove formed at a joint where the two sheet members are joined by squeezing the two sheet members .
The absorbent article of claim 1. The groove is formed in a central portion of the absorbent body in the width direction,
The microgrooves adjacent to each other in the longitudinal direction move the urine in different directions in the width direction.
3. The absorbent article according to claim 1 or 2. 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.
3. The absorbent article according to claim 1 or 2. The number of the fine grooves that move the urine toward the center in the width direction is greater than the number of fine grooves that move the urine toward the end of the absorbent body in the width direction.
The absorbent article according to claim 4. Further provided is a guide portion for guiding the urine to the skin surface side outside the groove.
6. The absorbent article according to any one of claims 1 to 5.

Images