JP2021016482A - Absorbent article - Google Patents

Abstract

To provide an absorbent article which is excellent in fitness, is easily detachable from a paper diaper main body as an underpants type or tape-fixing type outer, and can prevent side leakage even when being used for a relatively long time.SOLUTION: An absorbent article which is divided into a front part, a rear part and a crotch part, and comprises a liquid permeable top sheet, a liquid impermeable back sheet, and an absorber arranged therebetween is fixed to a paper diaper inner side and is used as an auxiliary pad. The absorbent article is such that: the absorber has in the crotch part, a pair of constricted parts constricted in an inside in a width direction in a side edge part, and at least one penetration groove penetrating in a thickness direction in a nearly central part in a width direction; the back sheet has fixing means detachable from the top sheet of the paper diaper at a non-skin contact surface side in the crotch part, the front part and the rear part; and the front fixing means and the rear fixing means are disposed in a nearly central part in a width direction of the back sheet, and in a position near an end part in a longitudinal direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to an inner pad type absorbent article.

In general, adult disposable diapers include a tape stopper type, a urine absorbing pad, a pants type, and the like, and these disposable diapers are appropriately selected and used according to the need for long-term care in excretion of the wearable person. These absorbent articles are composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the two sheets. By adopting such a configuration, body fluids such as urine permeate through the top sheet of the absorbent article and are absorbed by the absorber, and are prevented from leaking to the outside by the back sheet.

By the way, tape-stop type and pants-type disposable diapers may be used alone or with a urine absorbing pad inside, but at present, they are used in combination with a urine absorbing pad and are absorbent articles. In most cases, a certain urine absorbing pad is used by stacking it on the top sheet. This is because the cost per disposable diaper is high, so after absorbing and holding excrement with a urine absorbing pad that is cheaper than tape-stopping type or pants type disposable diapers, replace only the urine absorbing pad. This is because even after excretion, it is not necessary to replace the more expensive tape-stop type or pants-type disposable diapers, and the disposable diapers can be used economically at low cost.

Here, when the urine absorbing pad is used together with a tape-stopping type or pants-type paper diaper, the urine-absorbing pad is used as an inner, and the tape-stopping type or pants-type paper diaper is used as an outer, the leakage of excrement is effectively prevented. In order to fully demonstrate the absorption performance of the urine absorbing pad, it is necessary to have a good fit to the crotch, and regardless of the gender of the wearer, the absorption surface of the urine absorbing pad on the urinary tract of the wearer. Need to be in close contact.

However, since the urine absorbing pad must absorb a large amount of body fluid such as urine excreted by an adult, a large-sized and large-sized urine absorbing pad is widely used. For this reason, in order to attach the large urine absorbing pad to the crotch in close contact with the wearer, the urine absorbing pad may be folded vertically into a V-shape or a W-shape, or pulled while swinging left and right to the crotch. It has to be inserted, and it requires skill and familiarity to be worn by the caregiver, and in situations where such skill and familiarity are not used, the wearer is allowed to wear it with good adhesion to the crotch. There was a problem that it could not be done.

Patent Document 1 describes a pair of three-dimensional bodies of a disposable diaper, which is an inner pad of the disposable diaper, in order to prevent the lower crotch from floating, to prevent a decrease in fit to the human body, and to prevent leakage of body fluid such as urine. The surface of the crotch part of the gather is provided with the first fixing means that is detachably fastened to the inner surface of the three-dimensional gather on the side of the paper diaper body, and the surface of the ventral and back sides of the back sheet is removable to the inner surface of the paper diaper body. An absorbent article is disclosed, each of which has a second fixing means that is anchored to.
Further, in Patent Document 2, in order to easily attach the disposable diaper to the main body and adjust the position, and without excessively following the movement of the attached clothes, the fit is prevented from being deteriorated and the leakage of body fluid such as urine is prevented. In order to prevent, fixing means are provided on both widthwise edges of the front and rear sides of the disposable auxiliary pad, and the lengthwise crotch and widthwise central parts of the disposable auxiliary pad are provided with areas where there is no fixing means. Absorbent articles are disclosed.

Japanese Unexamined Patent Publication No. 2009-245061 Japanese Unexamined Patent Publication No. 2012-249691

However, in Patent Document 1, a fixing means is provided on the surface of the crotch portion of the pair of three-dimensional gathers of the paper diaper body to prevent the crotch portion from floating, but it is difficult to attach / detach to / from the paper diaper body for a long time. When worn, the fit is not sufficient in the expanded state after absorption, and there is concern about lateral leakage.

On the other hand, in Patent Document 2, fixing means are provided only on both front and rear edges of the disposable auxiliary pad in the width direction, and the adhesion at the crotch is weak, which is as high as seen in recent years. With the large absorbent pad, there is a problem that a space is created between the paper pants and the disposable auxiliary pad at the crotch, which leads to lateral leakage due to insufficient fixing.

Therefore, the present invention has been made in view of the above problems, has excellent fit, is easy to put on and take off from the outer paper diaper body such as pants type and tape stopper type, and is used for a relatively long time. However, it is an object of the present invention to provide an absorbent article capable of preventing lateral leakage.

In view of the above problems, the inventors of the present invention have conducted diligent research. As a result, at least one through groove penetrating in the thickness direction is provided in the crotch portion of the absorber in the substantially central portion in the width direction, and the crotch portion, front portion and rear portion of the back sheet are attached to and detached from the top sheet of the disposable diaper. We have found that the above problems can be solved by providing each of the free fixing means on the non-skin contact surface side, and have completed the present invention. Specifically, the present invention provides the following.

(1) The first aspect of the present invention is divided into a front portion, a rear portion, and a crotch portion between the front portion and the rear portion in the longitudinal direction, and a liquid-permeable top sheet and a liquid-impermeable top sheet. An absorbent article having a permeable backsheet and an absorber disposed between the topsheet and the backsheet, which is fixed inside a disposable diaper and used as an auxiliary pad, wherein the absorber is the crotch. In the portion, the side edge portion has a pair of constricted portions confined inward in the width direction, and at least one through groove penetrating in the thickness direction at a substantially central portion in the width direction, and the back sheet has the front portion, the said portion. The rear portion and the crotch portion have removable fixing means to the top sheet of the paper diaper on the non-skin contact surface side, respectively, and the front portion fixing means and the rear portion fixing means have the width of the back sheet. It is an absorbent article characterized in that it is provided at a position substantially in the center of the direction and near the end in the longitudinal direction.

(2) The second aspect of the present invention is the absorbent article according to (1), in which the crotch fixing means extends over the left and right ends of the absorber in the width direction and in the thickness direction. It is characterized in that it is provided in an overlapping region and is provided across a region overlapping the through groove in the thickness direction.

(3) A third aspect of the present invention is the absorbent article according to (1), wherein the crotch fixing means extends over the left and right ends of the absorber in the width direction and in the thickness direction. It is characterized in that it is provided in an overlapping region and is provided without crossing a region overlapping the through groove in the thickness direction.

(4) A fourth aspect of the present invention is the absorbent article according to any one of (1) to (3), wherein (the total length of the crotch fixing means in the width direction) / (the front portion). The length in the width direction of the fixing means or the rear fixing means) × 100 (%) is 160% or more and 533% or less.

(5) A fifth aspect of the present invention is the absorbent article according to any one of (1) to (4), wherein (the length of the through groove in the longitudinal direction) / (the length of the absorber). The length in the direction) × 100 (%) is 31% or more and 51% or less.

(6) A sixth aspect of the present invention is the absorbent article according to any one of (1) to (5), wherein the disposable diaper is a pants-type disposable diaper.

Therefore, according to the present invention, the fit is excellent, it is easy to put on and take off the outer paper diaper body such as pants type and tape stopper type, and lateral leakage can be prevented even if it is used for a relatively long time. Absorbent articles can be provided.

It is a top view of the absorbent article of this invention. It is a top view of the absorbent article in another embodiment of this invention. It is a cross-sectional view of the _X 1 -X ₁ in Fig. It is a cross-sectional view of the _X 1 -X ₁ in Fig.

Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail, but these are listed for the purpose of exemplification, and the present invention is not limited thereto. The same elements are designated by the same reference numerals throughout the description of the embodiments.

Further, in the description of the present specification, the time when the absorbent article 1 is worn means at least one of the time when the absorbent article 1 is worn and the time after the absorbent article 1 is worn. The longitudinal direction of the absorbent article 1 is a direction extending in front of and behind the wearer when the absorbent article 1 is worn, and is a direction indicated by reference numeral Y in the drawing. The width direction of the absorbent article 1 is a direction laterally or orthogonal to the longitudinal direction, and is a direction indicated by reference numeral X in the drawing. Further, the skin contact surface is the surface of the front and back surfaces of each member such as the absorber that is arranged on the wearer's skin side when worn, and the non-skin contact surface is each member such as the absorber. Of the front and back sides of the above, the side facing the wearer's skin side when worn. Body fluid refers to the liquid discharged from the body to the outside of the body, such as urine, blood, and water in loose stool. Further, the absorbent article 1 is an absorbent article fixed inside the disposable diaper and used as an auxiliary pad, and the disposable diaper is preferably a pants-type disposable diaper, but the present invention is not limited to the tape. It may be a stop-type disposable diaper or the like.

<Absorbable article>
Figure 1 is a plan view of the absorbent article 1 from the top sheet 10 side according to the embodiment of the present invention, FIG. 3 is a cross-sectional view at X ₁ -X ₁ of the absorbent article 1 of Fig. 1 .. Also, FIG. 2 is a plan view of an absorbent article 1 according to another embodiment as viewed from the top sheet 10 side of the present invention, FIG. 4 is a cross-sectional of X ₁ -X ₁ of the absorbent article 1 of Fig. 2 It is a figure.
As shown in FIGS. 1 to 4, the absorbent article 1 is divided into a front portion 2, a rear portion 3, and a crotch portion 4 between the front portion 2 and the rear portion 3. In addition, the absorbent article 1 includes a liquid-permeable top sheet 10 arranged on the skin contact surface side and a liquid-impermeable back sheet arranged on the non-skin contact surface side facing the top sheet 10. It has 20 and an absorber 30 arranged between the top sheet 10 and the back sheet 20. As a result, the absorber 30 has a structure sandwiched between the top sheet 10 and the back sheet 20.

The length of the absorbent article 1 in the longitudinal direction is preferably 430 mm or more and 550 mm or less. Further, the length of the front portion 2 in the width direction is preferably 130 mm or more and 190 mm or less, the length of the rear portion 3 in the width direction is preferably 130 mm or more and 190 mm or less, and the length of the crotch portion 4 in the width direction. Is preferably 130 mm or more and 190 mm or less. By adjusting the dimensions of the absorbent article 1 within the above range, the absorbent article 1 suitable for the inner pad of a disposable diaper can be obtained.

Further, in order to prevent lateral leakage of the body fluid excreted by the wearer, the absorbent article 1 has a pair of three-dimensional objects having elastic members for three-dimensional gathers on the top sheet 10 along the longitudinal direction of the absorbent article 1. It may be provided with gathers 70. The outer end of the three-dimensional gather 70 in the width direction of the absorbent article 1 is fixed to the back sheet 20, the inner end thereof is fixed to the top sheet 10, and the center thereof is a free end not fixed to the top sheet 10. A three-dimensional gather sheet is arranged. By providing the elastic member for three-dimensional gather along the longitudinal direction, the three-dimensional gather 70 has an upright property and can be deformed according to the body shape of the wearer. As the elastic member for three-dimensional gathering, for example, a thermal bond nonwoven fabric, a spunbonded nonwoven fabric, a polyethylene film, or a sheet obtained by combining and joining these sheets can be used. From the viewpoint of strength and workability, the basis weight of the three-dimensional gather 70 is preferably 10 g / m ² or more and 30 g / m ² or less.

<Top sheet>
The top sheet 10 may be formed of a base material having liquid permeability such that body fluid moves to the absorber 30, and for example, known hydrophilic non-woven fabrics such as thermal-bonded non-woven fabrics and spunbonded non-woven fabrics can be used. .. Further, the surface of the top sheet 10 may be embossed or perforated in order to improve the liquid permeability. As a method for performing these embossing and drilling processes, known methods can be carried out without limitation. Further, in order to reduce irritation to the skin, the top sheet 10 may contain a lotion, an antioxidant, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizer and the like.
From the viewpoint of strength, workability and liquid return amount, the basis weight of the top sheet 10 is preferably 13 g / m ² or more and 40 g / m ² or less. The shape of the top sheet 10 is not particularly limited, but may be any shape that covers the entire absorber 30 required for guiding the body fluid to the absorber 30 so as not to leak.

<Back sheet>
The back sheet 20 may be formed by using a base material having a liquid impermeable property so that the body fluid held by the absorber 30 does not wet the clothes, and is breathable or non-breathable liquid impermeable. Sexual plastic film can be used.

From the viewpoint of strength and workability, the basis weight of the back sheet 20 is more preferably 15 g / m ² or more and 60 g / m ² or less. In order to provide the back sheet 20 with breathability, for example, a filler may be blended in the resin film of the base material, or the back sheet 20 may be embossed. Calcium carbonate can be mentioned as the filler, and a known method can be used without limitation as the blending method.

<Absorbent>
In the absorbent article 1 of the present invention, the length L2 of the absorber 30 in the longitudinal direction is preferably 350 mm or more and 470 mm or less. Further, the length in the width direction of the front portion 2 of the absorber 30 is preferably 90 mm or more and 170 mm or less, the length in the width direction of the rear portion 3 is preferably 90 mm or more and 170 mm or less, and the width of the crotch portion 4 is wide. The length in the direction is preferably 80 mm or more and 160 mm or less. As shown in FIGS. 3 and 4, the absorber 30 preferably has a two-layer structure of an upper layer absorber 31 and a lower layer absorber 32.

(Absorbable fiber)
The absorber 30 contains an absorbent fiber as a base material and a highly absorbent polymer.
The absorbent fiber is not particularly limited as long as it is generally used for absorbent articles such as incontinence products and urine absorbing pads. For example, fluff pulp, cotton, rayon, acetate, tissue, absorbent paper, hydrophilic non-woven fabric. And so on. Among these, it is preferable to use fluff pulp from the viewpoint of absorbability. Examples of the fluff pulp include wood pulp (for example, coniferous bleached kraft pulp (N-BKP) such as Southern pine and Douglas fur), synthetic fiber, resin fiber, non-wood pulp, etc. deflated into cotton. it can. When fluff pulp is used as the base material of the absorbent body 30, the basis weight of the absorbent fibers is preferably 180 g / m ² or more and 360 g / m ² or less. As a result, more body fluid can be absorbed without impairing the touch.

(Highly absorbent polymer)
The highly absorbent polymer (SAP) of the absorber 30 is not particularly limited as long as it can absorb body fluids and prevent backflow, and is sodium polyacrylate-based, polyaspartate-based, (starch-acrylic acid). Those formed from materials such as an acid) graft copolymer, a (acrylic acid-vinyl alcohol) copolymer, a (isobutylene-maleic anhydride) copolymer and a saponified product thereof can be used. Among these, sodium polyacrylate is preferable from the viewpoint of the amount of absorption per weight.

The basis weight of the highly absorbent polymer contained in the absorber 30 is preferably 80 g / m ² or more and 135 g / m ² or less. Further, the weight% of the highly absorbent polymer with respect to the total weight of the absorber 30 is preferably 15% or more and 45% or less. By setting the basis weight and% by weight of the highly absorbent polymer within the above numerical ranges, gel blocking in the absorber 30 can be prevented, and a large amount of body fluid can be absorbed by the absorber 30.
In the absorbent body 30, the form of the absorbent fiber and the highly absorbent polymer is preferably a laminated mat formed by mixing SAP particles in the absorbent fiber.

(Constriction)
The absorbent body 30 in the absorbent article 1 of the present invention has a pair of constricted portions 40 constricted inward in the width direction at the side edge portion of the crotch portion 4. By having the constricted portion 40, the fit of the crotch portion 4 when the absorbent article 1 is attached is improved. The radius of curvature of the constricted portion 40 is preferably R20 mm or more and R70 mm or less.

(Through groove)
Further, the absorber 30 in the absorbent article 1 of the present invention has at least one through groove 50 penetrating in the thickness direction at a substantially central portion in the width direction in the crotch portion 4. By having the through groove 50, it is possible to improve the fit of the crotch portion 4 when the absorbent article 1 is attached and to improve the diffusivity of body fluid such as urine. In this case, the substantially central portion in the width direction, it means that are arranged to be in line symmetry about the widthwise center line Y ₁ -Y ₁ of the absorbent article 1.
The length L1 of the through groove 50 in the longitudinal direction is preferably 150 mm or more and 180 mm or less, and more preferably 170 mm or more and 180 mm or less. The length in the width direction is preferably 10 mm or more and 40 mm or less, and more preferably 20 mm or more and 30 mm or less. When the absorber 30 has a two-layer structure, it is preferable that both the upper layer absorber 31 and the lower layer absorber 32 penetrate.

Further, the ratio of the longitudinal length L1 of the through groove 50 to the longitudinal length L2 of the absorber 30 (longitudinal length of the through groove 50) / (longitudinal length of the absorber 30). ) × 100 (%) is preferably 31% or more and 51% or less, and more preferably 36% or more and 51% or less. By setting the ratio within the above numerical range, the fit of the crotch portion 4 when the absorbent article 1 is attached and the diffusibility of body fluid such as urine can be further improved.

<Fixing means>
The back sheet 20 in the absorbent article 1 of the present invention has the front portion 2, the rear portion 3 and the crotch portion 4 which are detachable fixing means (front fixing means 60, rear fixing means 61 and crotch) to the top sheet of the disposable diaper. Each of the fixing means 62) is provided on the non-skin contact surface side. By having the fixing means at three places, the absorbent article 1 and the disposable diaper can be fixed without generating an extra space, sufficient fixing property and fit can be obtained, and lateral leakage can be prevented. A hook tape, a hook-and-loop fastener, or the like can be used as the fixing means, but the hook tape is particularly preferable.
The front fixing means 60 and the rear fixing means 61 are provided at substantially the center of the back sheet 20 in the width direction and near the end in the longitudinal direction. At this time, this time, the width direction substantially central portion, means that are arranged to be in line symmetry about the widthwise center line Y ₁ -Y ₁ of the absorbent article 1, the longitudinal ends The term "near" means that the front portion 2 and the rear portion 3 are arranged inside the absorbent article 1 in the longitudinal direction by 20 mm or more and 50 mm or less, respectively, from the longitudinal end portions.
The length of the front fixing means 60 and the rear fixing means 61 in the longitudinal direction is preferably 15 mm or more and 30 mm or less, and more preferably 20 mm or more and 30 mm or less. Further, the length W2 in the width direction is preferably 30 mm or more and 50 mm or less, and more preferably 40 mm or more and 50 mm or less.

Further, as shown in FIGS. 1 and 3, the crotch fixing means 62 is provided in a region overlapping the left and right ends of the absorber 30 in the width direction in the thickness direction, and is thick with the through groove 50. It may be provided across a region that overlaps in the longitudinal direction, or as shown in FIGS. 2 and 4, it is provided in a region that overlaps the region extending across the left and right ends in the width direction of the absorber 30 in the thickness direction. Moreover, it may be provided so as not to cross the region overlapping the through groove 50 in the thickness direction.
In any case, the length of the crotch fixing means 62 in the longitudinal direction is preferably 15 mm or more and 30 mm or less, and more preferably 20 mm or more and 30 mm or less. Further, the total length (W1 or W3 + W4) in the width direction is preferably 80 mm or more and 160 mm or less, and more preferably 110 mm or more and 140 mm or less.

Further, it is the ratio of the total length (W1 or W3 + W4) of the crotch fixing means 62 in the width direction to the width (W2) of the front fixing means 60 or the rear fixing means 61 (of the crotch). The overall length of the fixing means 62 in the width direction) / (the length of the front fixing means 60 or the rear fixing means 61 in the width direction) × 100 (%) is preferably 160% or more and 533% or less, 220. More preferably, it is% or more and 350% or less. By setting the ratio within the above numerical range, the fixability between the absorbent article 1 and the outer disposable diaper can be improved, thereby further improving the fit of the crotch portion 4 when the absorbent article 1 is attached. it can.

<Career sheet>
Further, as shown in FIGS. 3 and 4, it is preferable that the entire absorber 30 is wrapped and the carrier sheet 80 is arranged between the upper layer absorber 31 and the lower layer absorber 32.
Like the top sheet 10, the carrier sheet 80 may be formed of a base material having a liquid permeability that allows body fluid to move to the absorber 30, and for example, tissue paper, a thermal bond non-woven fabric, or a spun bond non-woven fabric. A known hydrophilic non-woven fabric or the like can be used.

<Manufacturing method of absorbent articles>
The method for producing the absorbent article 1 is not particularly limited, and a conventionally known method can be adopted. For example, the back sheet 20, the absorber 30, and the top sheet 10 are laminated in this order from the non-skin contact surface side. Then, the top sheet 10 and the back sheet 20 can be manufactured by fixing and sealing them with a hot melt adhesive, heat embossing, ultrasonic embossing, high frequency embossing, or the like over a part or the entire circumference. ..

Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above-described embodiments and examples. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. Further, it is clear from the description of the claims that the form in which such a modification or improvement is added may be included in the technical scope of the present invention.

Hereinafter, the present invention will be described in detail with reference to examples. The present invention is not limited to the examples shown below.

Examples and comparative examples having the sizes and through-groove shapes of the fixing means shown in Tables 1 and 2 below were prepared and monitored. In Examples 1 to 3 and Comparative Examples 1 and 2 shown in Table 1, when both the through groove and the crotch fixing means are provided, the region where the crotch fixing means overlaps the through groove in the thickness direction is formed. In Examples 4 to 6 and Comparative Examples 3 to 4 shown in Table 2, when both the through groove and the crotch fixing means are provided, the crotch fixing means is thick with the through groove. It is provided without crossing the overlapping areas in the longitudinal direction.

<Evaluation method>
Using the absorbent articles of Examples and Comparative Examples as inners for pants-type disposable diapers, 10 panelists who wear disposable diapers on a daily basis were asked to wear them overnight (10 hours), and the fit and lateral leakage after urination absorption were performed. I got an answer about the presence or absence of. Based on the answers, the absorbent articles of Examples and Comparative Examples were evaluated as follows.
○: “There was no discomfort after urination absorption”, “There was no lateral leakage even after wearing it overnight” when 8 or more and 10 or less △: “There was no discomfort after urination absorption”, “ When 5 or more and 7 or less people said "There was no horizontal leakage even if I wore it overnight" ×: "There was no discomfort after absorbing urination", "There was no horizontal leakage even if I wore it overnight" The results are shown in Tables 1 and 2 when there are no or less than 4 people.

<When the crotch fixing means crosses the area where the through groove overlaps in the thickness direction>
In the first embodiment, by providing the fixing means in the crotch portion across the region overlapping the through groove in the thickness direction, the fixing property of the absorbent article in the crotch portion to the paper diaper and the fit when worn are improved. It was confirmed that there was no decrease in discomfort after absorption and that it was effective in preventing lateral leakage. Further, in the second embodiment, by maximizing the length of the crotch fixing means, the fixing property of the absorbent article in the crotch to the paper diaper is further improved, so that a better effect is obtained for preventing lateral leakage. Was done. Further, in Example 3, the total length of the crotch fixing means is minimized, and the same effect as in Example 1 was obtained with this value.
On the other hand, in Comparative Example 1, there is no through groove or fixing means in the crotch part, a space is created between the disposable diaper and the absorbent article, the fixing property is insufficient, and the fit is insufficient, so that lateral leakage occurs. It was. Further, in Comparative Example 2, since the length of the crotch fixing means in the width direction is smaller than the range of the present application, the fixability between the disposable diaper and the absorbent article is insufficient, causing a decrease in fit and a feeling of discomfort after absorption. ..

<When the crotch fixing means does not cross the area that overlaps the through groove in the thickness direction>
In the fourth embodiment, by providing the fixing means in the crotch portion without crossing the region overlapping the through groove in the thickness direction, the deformation of the through groove at the time of mounting can be maintained without being hindered by the fixing means, and the fit is good. Is urging the improvement of. Therefore, there was no discomfort after absorption, and the effect of preventing lateral leakage was obtained. Further, in the range of the present application, the length of the through groove in the width direction is shorter and the length of the crotch fixing means in the width direction is larger than that of the first embodiment in the fifth embodiment, but the width of the fixing means is larger. Due to the large size, the fixability of the absorbent article in the crotch to the disposable diaper was improved, and lateral leakage could be suppressed even if the width of the through groove was small. Further, in the range of the present application, the length of the through groove in the width direction is larger and the length of the crotch fixing means in the width direction is shorter than that of the first embodiment in the sixth embodiment, but the same as in the fourth embodiment. The effect of was obtained.
On the other hand, in Comparative Example 3, since there is no through groove, the fit to the human body at the time of wearing is lowered, which causes a feeling of discomfort after absorption, and also causes lateral leakage due to a decrease in diffusion of body fluid such as urine. Was there. Further, in Comparative Example 4, since the length of the crotch fixing means in the width direction is shorter than the range of the present application, the fixability between the disposable diaper and the absorbent article is insufficient, causing a decrease in fit and a feeling of discomfort after absorption. It was.
Therefore, according to the present invention, the fit is excellent, it is easy to put on and take off the outer paper diaper body such as pants type and tape stopper type, and lateral leakage can be prevented even if it is used for a relatively long time. Absorbent articles can be obtained.

1 Absorbent article 2 Front 3 Rear 4 Crotch 10 Top sheet 20 Back sheet 30, 31, 32 Absorbent 40 Constriction 50 Through groove 60, 61, 62 Fixing means 70 Three-dimensional gather 80 Carrier sheet

Claims (6)

In the longitudinal direction, it is divided into a front part, a rear part, and a crotch part between the front part and the rear part.
An absorbent article fixed inside a disposable diaper and used as an auxiliary pad, which has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber arranged between the top sheet and the back sheet. And
In the crotch portion, the absorber has a pair of constricted portions confined inward in the width direction at the side edge portion, and at least one through groove penetrating in the thickness direction at a substantially central portion in the width direction.
The back sheet has removable fixing means to the top sheet of the disposable diaper on the non-skin contact surface side at the front portion, the rear portion and the crotch portion, respectively.
An absorbent article characterized in that the front fixing means and the rear fixing means are provided at a substantially central portion in the width direction of the back sheet and near the end portion in the longitudinal direction. The crotch fixing means is provided in a region overlapping the region extending across the left and right ends in the width direction of the absorber in the thickness direction, and is provided across a region overlapping the through groove in the thickness direction. The absorbent article according to claim 1. The crotch fixing means is provided in a region that overlaps the region extending across the left and right ends in the width direction of the absorber in the thickness direction, and is provided without crossing the region that overlaps the through groove in the thickness direction. The absorbent article according to claim 1. (Overall length in the width direction of the crotch fixing means) / (length in the width direction of the front fixing means or the rear fixing means) × 100 (%) is 160% or more and 533% or less. The absorbent article according to any one of claims 1 to 3, characterized in that. 1. Of claims 1 to 4, wherein (longitudinal length of the through groove) / (longitudinal length of the absorber) × 100 (%) is 31% or more and 51% or less. The absorbent article according to any one item. The absorbent article according to any one of claims 1 to 5, wherein the disposable diaper is a pants-type disposable diaper.