JP4621124B2 - Disposable paper diapers - Google Patents

Description

  The present invention relates to a pants-type or tape-fastened disposable paper diaper having a removable absorbent pad.

In some disposable paper diapers such as a pants-type and a tape-fastened type, an absorbent pad is detachable from the diaper body. Such a disposable diaper is convenient because it can save the caretaker by replacing only the absorbent pad without replacing the diaper main body, particularly when only urinating. Further, since the caretaker and the person can easily replace the dirty absorbent pad relatively frequently, it is hygienic to the wearer's skin and can avoid the occurrence of skin troubles. In addition to this, adult diapers are not particularly inexpensive, but the frequency of replacing the diaper body is reduced, which leads to cost savings and helps consumers economically.
In order to avoid such drawbacks, an adhesive is provided on the surface where the inner surfaces of the flaps on both sides of the diaper body are opposed to each other, and the lower surfaces of both sides of the auxiliary absorbent pad are adhered and held on both bonded portions. Some use an auxiliary pad (see, for example, Patent Document 1).
In addition, there is a disposable diaper in which the pad is stored in a pair of pockets that can open toward the inside of the diaper body so as to prevent the auxiliary pad from moving up, down, left and right (see, for example, Patent Document 2). .
However, in the invention of Patent Document 1, the absorbent pad is fixed with an adhesive on the inner surface of the flap and is sandwiched between the flaps. However, the flap itself rises and is intended to form a gather. Since the function of fixing with the pad sandwiched therebetween and the function of forming the rising gather are contradictory and contradictory, the fixing is necessarily insufficient.
Further, in the invention of Patent Document 2, both sides of the pad are stored in a pair of pockets formed in the longitudinal direction of the diaper so as to prevent vertical displacement. It is difficult to prevent leakage from the legs.
Japanese Utility Model Publication No. 7-329 (Registration No. 2511443) JP-A-9-75385

  Therefore, a main problem of the present invention is to provide a disposable paper diaper having a simple mechanism that can easily remove and remove the absorbent pad and reliably prevent the absorbent pad from shifting in a disposable paper diaper having a removable absorbent pad. There is. And as a more preferable form, it is providing the disposable paper diaper which a user can arrange | position an absorption pad in arbitrary appropriate positions.

The present invention that has solved the above-described problems and the effects thereof are as follows.
<Invention of Claim 1>
A diaper main body portion in which a locking sheet material is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet;
An absorbent pad that is detachably fastened to the liquid-permeable top sheet side surface of the diaper main body, and that absorbs and retains body fluids therein,
The locking sheet material has body fluid absorbability and / or diffusibility,
A mounting hole is formed in the liquid-permeable top sheet, the locking sheet material is exposed from the mounting hole, and constitutes a first locking element,
A second locking element that engages with the locking sheet material is formed on the outer surface of the absorbent pad,
A disposable paper diaper wherein the absorbent pad is detachably secured to the diaper main body by the engagement of the second locking element and the first locking element.

(Function and effect)
The structure is simple and the absorbent pad can be easily attached and detached. Further, it becomes easy to position the absorption pad at an appropriate position.
Further, the body fluid leaking from the absorbent pad can be prevented from leaking outside from the diaper body by absorbing or holding or diffusing it.

<Invention of Claim 2>
A diaper main body portion in which a locking sheet material is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet;
An absorbent pad that is detachably fastened to the liquid-permeable top sheet side surface of the diaper main body, and that absorbs and retains body fluids therein,
The locking sheet material has body fluid absorbability and / or diffusibility,
A plurality of mounting holes arranged in a line along the front-rear direction are formed in the liquid-permeable top sheet, and the locking sheet material is exposed from the through holes, and the first locking elements are Configure
A second locking element that engages with the locking sheet material is formed on the outer surface of the absorbent pad,
A disposable paper diaper wherein the absorbent pad is detachably secured to the diaper main body by the engagement of the second locking element and the first locking element.

(Function and effect)
The absorption pad can be simply arranged and fixed at a predetermined appropriate position according to the individual user, and no deviation occurs after the arrangement.
Further, the body fluid leaking from the absorbent pad can be prevented from leaking outside from the diaper body by absorbing or holding or diffusing it.

<Invention of Claim 3 >
The absorbent pad includes two or more second locking elements, and a plurality of the two or more second locking elements are configured to engage with each of the plurality of first locking elements. The disposable paper diaper according to claim 2 .

(Function and effect)
Since there are a plurality of locking portions, the fastening property between the diaper main body portion and the absorbent pad is enhanced, and the absorbent pad is less likely to be displaced or dropped from the diaper main body portion during use.

<Invention of Claim 4 >
The disposable paper diaper according to any one of claims 1 to 3 , wherein the first locking element and the second locking element are mechanical fasteners.

(Function and effect)
The mechanical fastener can be detachably fastened easily and easily.

<Invention of Claim 5 >
The disposable paper diaper according to claim 4 , wherein the second locking element is a male fastener.

(Function and effect)
By providing the male fastener on the absorbent pad having higher rigidity than the diaper main body, the softness of the diaper main body is not impaired and the feeling of use is excellent.

<Invention of Claim 6 >
The disposable paper diaper according to any one of claims 1 to 5 , wherein the mounting hole formed in the liquid-permeable top sheet is circular or square in a front view.

(Function and effect)
It is easy to visually recognize an appropriate position, and it is possible to reliably attach it to a desired position.

<Invention of Claim 7 >
The disposable paper diaper according to any one of claims 1 to 6 , wherein the locking sheet material is a nonwoven fabric.

(Function and effect)
It can be manufactured inexpensively and easily.

<Invention of Claim 8 >
The locking sheet material is a laminated material in which a nonwoven fabric is laminated and adhered to one surface of a porous film sheet, and the nonwoven fabric sheet surface of the laminated material is on the liquid-permeable top sheet side so that the liquid-permeable property is obtained. The disposable paper diaper according to any one of claims 1 to 6 , wherein the disposable paper diaper is interposed between the top sheet and the liquid-impermeable back sheet.

(Function and effect)
Since the nonwoven fabric is bonded to the film sheet, the nonwoven fabric is prevented from being unnecessarily pulled out from the mounting holes when the absorbent pad is detached.

<Invention of Claim 9 >
The disposable paper diaper according to any one of claims 1 to 8 , wherein the liquid-permeable top sheet and the locking sheet material are bonded to each other at a peripheral edge of the mounting hole.

(Function and effect)
Since the locking sheet is bonded to the periphery of the mounting hole of the liquid-permeable top sheet, for example, the locking sheet is pulled out from the mounting hole more than necessary with the removal of the absorbent pad. Is prevented.

<Invention of Claim 10 >
The disposable paper diaper according to any one of claims 1 to 9 , wherein the locking sheet material is colored in a different color from the liquid-permeable top sheet.

(Function and effect)
The first locking element is easily visible.

  As described above, according to the present invention, a disposable paper diaper in which an absorbent pad can be easily attached and detached is provided. In addition, a disposable paper diaper having a simple mechanism that allows the user to arrange the absorbent pad at an appropriate position and reliably prevent the absorbent pad from being displaced is provided.

Next, embodiments of the present invention will be described in detail below with reference to the drawings.
<First Embodiment>
The disposable paper diaper Z of the present embodiment includes a diaper main body part X1 and an absorbent pad Y1 that is detachably fixed to the skin contact surface side of the diaper main body part X1.

  As shown in FIGS. 1 to 3, the diaper main body X <b> 1 has a shape called a tape type or a fastening type that includes a fastening tape 20 on the waist, and is also permeable to the user's skin. A locking sheet material 3 having a certain degree of rigidity, such as a rectangular or preferably hourglass shape, is interposed between the permeable top sheet 1 and the liquid-impermeable back sheet 2 that is located outside the product and substantially impermeable to liquid. Structure.

  The liquid-impermeable back sheet 2 has a substantially rectangular shape wider than the locking sheet material 3, and an exterior sheet made of a nonwoven fabric or the like can be provided on the outer surface of the liquid-impermeable back sheet 2 for improving the touch. The liquid-impermeable back sheet 2 can be formed of a plastic film such as a polyethylene film. Further, in recent years, there is a tendency to use a material having moisture permeability from the viewpoint of preventing stuffiness, and as this water shielding / moisture permeable sheet material, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene. There is a microporous sheet obtained by forming a sheet and then stretching it in a uniaxial or biaxial direction.

  The liquid-permeable top sheet 1 extends outward from the side edge of the locking sheet material 3 and is bonded to the liquid-impermeable back sheet 3 with a hot melt adhesive (not shown) or the like. As the liquid-permeable top sheet 1, it is preferable to use a net-like sheet material obtained by plain weaving such as nylon or polyethylene terephthalate, a film sheet material having a large number of through holes, or a film sheet material such as polyethylene or polypropylene. is there.

  On the other hand, on the skin contact surface side of the diaper main body portion X1 of the present embodiment, the lifting elastic elastic members 4 and 4 provided along the longitudinal direction (front-rear direction) and the like stand up along the longitudinal direction on the skin side. A so-called barrier cuff 2B is provided. The specific configuration of the barrier cuff 2B is not particularly limited. Other than the illustrated example, a conventionally known configuration of the barrier cuff 2B can be appropriately adopted.

  The locking sheet material 3 is a sheet material that constitutes the first locking element 3A that substantially fixes the absorbent pad Y1 to the diaper main body X1, and is composed of tow fibers or a nonwoven fabric, preferably a nonwoven fabric. is there. Details will be described later. In the disposable paper diaper Z according to the present invention, body fluid is absorbed mainly by the absorbent pad Y1 disposed on the liquid-permeable top sheet 1, but the body fluid leaked from the absorbent pad Y1 is diffused or absorbed and retained. For the purpose, a bodily fluid holding function may be imparted by, for example, slightly dispersing an appropriate known absorbent polymer or the like in the locking sheet material.

  Here, the diaper main body portion X1 of the present embodiment is characteristically formed with a plurality of mounting holes 2H, 2H arranged in a line along the front-rear direction in the liquid-permeable top sheet 1 and arranged at intervals. The locking sheet material 3 is exposed from the mounting holes 2H, 2H to form first locking elements 3A, 3A.

  In this embodiment, the mounting holes 2H, 2H are bowl-shaped, and are formed in a line from the front body F to the rear body B, with a plurality of lines arranged at intervals in the center in the width direction. Similarly, a plurality of bowl-shaped first locking elements 3A and 3A are arranged in a line at a position substantially spaced from the front body F through the crotch C to the back body B with a space on the line.

  Further, in this embodiment, the locking sheet material 3 is colored in a different color from the liquid-permeable top sheet 1, and accordingly, the locking sheet material 3 and the like viewed from the mounting holes 2H and 2H. The first locking elements 3A and 3A are easily visible. In addition, the coloring method of the sheet material 3 for latching is not specifically limited. It is possible to obtain a locking sheet material colored by forming a nonwoven fabric using an appropriate fiber dyeing method or a colored fiber raw material.

  On the other hand, as shown in FIGS. 4 and 5, the absorbent pad Y <b> 1 has a structure in which an absorbent body 12 is interposed between a liquid-permeable top sheet 10 and a liquid-impervious back sheet 11.

  The surface sheet 10 can be formed of a non-woven fabric, and the non-woven fabric is made of synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyethylene or polypropylene, recycled fibers such as rayon or cupra, cotton, etc. A non-woven fabric obtained by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. Further, it may be a non-woven fabric having a layer structure such as an SMS non-woven fabric, a point bond non-woven fabric, a plastic film such as a polyethylene film, or a laminated non-woven fabric obtained by laminating a plastic film and a non-woven fabric.

  The back sheet 11 can be formed of the same material as the liquid-impermeable back sheet 3. For example, a sheet material having at least water shielding properties such as an olefin-based resin sheet such as polyethylene or polypropylene is used, but in addition to this, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, and further, a waterproof film is interposed. For example, a non-woven sheet having impermeableness to liquid can be used.

  The absorbent body 12 adopts a known aspect in which a conventionally known absorbent core 12A such as a piled pulp in which an absorbent polymer is contained is encased by a liquid-permeable sheet such as a crepe paper 3, a nonwoven fabric, or a perforated sheet. be able to.

  Examples of the superabsorbent polymer include carboxymethyl cellulose, polyacrylic acid and salts thereof, acrylate polymer cross-linked product, starch-acrylic acid graft copolymer, starch-acrylonitrile graft copolymer hydrolyzate, polyoxyethylene cross-linked product Products, crosslinked products of carboxymethyl cellulose, polyethylene oxide, polyacrylamide, and other partially crosslinked polymers, or a copolymer of isobutylene and maleic acid are preferably used. What added the blocking inhibitor in order to suppress the blocking property by moisture absorption of a product can also be used. In addition, the superabsorbent polymer has various forms such as powder, particles, granules, pellets, sol, suspension, gel, film, and nonwoven fabric. Any of them can be used in the present invention, and a particulate material is particularly preferably used.

  A second locking element 14 is provided on the back sheet 11 side of the absorbent pad Y1. In this embodiment, the second locking sheet 14 is a male male fastener of mechanical fastener (represented by Velcro [registered trademark]) in which a large number of saddle-shaped or fishhook-shaped male engaging portions 14A, 14A. This is the fastener sheet 14. The male fastener sheet 14 is cut into a size substantially the same as or slightly smaller than the mounting hole 2H, and the same distance as the mounting holes 2H and 2H of the diaper main body portion X1 is provided at two front and rear positions of the back sheet 11. The second locking element 14 is fixed by non-peeling through an adhesive 15 or heat-sealed. And this 2nd latching element 14 engages with said 1st latching element 3A (seat material 3 for latching) with what is called a mechanical fastener mechanism, and absorption pad Y1 is detachable with respect to a diaper main-body part. Can be fixed. In this embodiment, the absorbent pad Y1 is formed to a size that fits between the left and right barrier cuffs 2B, 2B, and in the fastened state, the absorbent pad 3Y is disposed between the barrier cuffs 2B, 2B and fastened.

  The locking force between the first locking element 3A and the second locking element 14 can be adjusted, for example, by appropriately designing the density of the male engaging portions 14A, 14A ... of the male fastener tape 14. it can.

  Here, the non-woven fabric used for the locking sheet material 3 will be described in detail. As the non-woven fabric, as constituent material fibers, in addition to synthetic fibers such as polyethylene or polypropylene, olefin-based, polyester-based, polyamide-based, etc., rayon or cupra Natural fibers such as cotton can be selected, and can be manufactured by an appropriate processing method such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. . Among the processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft. Further, it may be a non-woven fabric having a layer structure such as an SMS non-woven fabric, a point bond non-woven fabric, a plastic film such as a polyethylene film, or a laminated non-woven fabric obtained by laminating a plastic film and a non-woven fabric. A laminated material in which a nonwoven fabric is laminated and adhered to one surface of the porous film sheet may be used. In this case, it arrange | positions between the said liquid-permeable top sheet and a liquid-impermeable back sheet | seat so that especially a nonwoven fabric sheet layer surface may become the liquid-permeable top sheet side.

  In addition, in Japanese Patent No. 3537610, the nonwoven fabric described as “nonwoven fabric A” is suitable for use as a female fastener for mechanical fasteners without being sticky and excellent in softness. Is particularly suitable.

  In addition, although the nonwoven fabric used for the said surface sheet 10 can also be used as the liquid-permeable top sheet 1, the 2nd latching elements 14 and 14 of the absorption pad Y1 are other than 1st latching elements 3A and 3A. If the second locking elements 14 and 14 are male fasteners as in the present embodiment so as not to inadvertently engage with the portions, the material of the liquid-permeable top sheet 1 is a porous film sheet rather than a nonwoven fabric. Is more suitable.

  In the disposable paper diaper Z of the present embodiment described in detail above, as shown in FIGS. 6 to 9, in particular, the appropriate second locking element 3A of the diaper main body Y1 can be selected and attached to the absorbent pad Y1. As shown in FIG. 8, the absorbent pad Y1 can be offset to the front body F side of the diaper main body X1 and fastened, and as shown in FIG. 9, the absorbent pad Y1 is attached to the rear body of the diaper main body X1. It can also be fixed by being offset to the B side. When the absorbent pad Y1 is fixed at an appropriate position on the diaper main body portion X1, the disposable paper diaper of this embodiment has a plurality of first locking elements 3A of the diaper main body portion X1 arranged in an orderly manner. Since the fastening position is easy to see, and the size and interval of the second locking element 14 are substantially the same as the size and interval of the first locking element 3A, the absorbent pad Y1 is positioned at a desired appropriate position. It is easy to squeeze and it is extremely easy to detachably attach to the diaper main body X1.

<Second Embodiment>
Next, a second embodiment will be described. As shown in the front view of the diaper main body X2 in FIG. 10 and the absorbent pad Y2 in FIG. 11, in this embodiment, the mounting holes 2H and 2H formed in the liquid-permeable topsheet 1 are spaced apart in the width direction. In this embodiment, two rows are formed. Accordingly, the second locking elements 14, 14 formed on the absorbent pad Y2 are also formed in two rows in the width direction at the same width interval as the width thereof. In this embodiment, the total number of second locking elements 14, 14... Is 2 × 2 × 4, but may be, for example, 3 × 2 in total.
About the other structure of the liquid-permeable top sheet 1, the sheet | seat material 3 for latching, the liquid-impermeable back sheet 2, and the absorption pad Y, it can take the structure similar to 1st Embodiment.
In this embodiment, a relatively high-rigidity mechanical fastener is not disposed at the central portion of the absorbent pad or the central portion in the width direction of the diaper main body that contacts a sensitive portion such as a urination port, a defecation port, or a diameter blood port. As a result, the feeling of use becomes excellent. Moreover, the engagement force of the absorption pad Y2 and the diaper main-body part X1 becomes strong by the increase in the locking point of a 1st locking element and a 2nd locking element, and especially the absorption pad Y2 becomes difficult to shift | deviate to a side part direction.

<Third Embodiment>
In the third embodiment, as is clear from the front view of the diaper main body shown in FIG. 12 and the front view of the absorbent pad Y3 shown in FIG. 13, the shape of the mounting hole in the second embodiment is round to circular. It is the aspect changed into. Accordingly, the second locking elements 14, 14... Formed on the absorbent pad Y3 are also circular.
The other configurations of the liquid-permeable top sheet 1, the locking sheet material 3, the liquid-impermeable back sheet 2 and the absorbent pad Y3 are the same as those in the second embodiment, and are therefore omitted.
In this embodiment, since the mounting holes 2H and 2H are circular and have no corners, the uncomfortable feeling when the mounting holes 2H and 2H not used for engagement come into contact with the skin is small.

<Fourth embodiment>
In the fourth embodiment, as shown in the front view of the diaper main body shown in FIG. 14 and the XV-XV sectional view shown in FIG. 15, the liquid-permeable top sheet 1 and the locking sheet material 3 are: This is a form in which the hot-melt adhesive 5 is adhered to the periphery of the mounting holes 2H and 2H. A range of approximately 1 to 10 mm from the end edge of the attachment hole 2H is suitable for the adhesion region. If it is less than 1 mm, the force for fixing the nonwoven fabric to the top sheet is weak, and if it exceeds 10 mm, a feeling of stiffness due to the hot melt adhesive can be felt.
Other configurations of the liquid-permeable top sheet 1, the locking sheet material 3, and the liquid-impermeable back sheet 2 and the configuration of the absorbent pad are the same as those in the first embodiment.
In this embodiment, since the liquid-permeable top sheet 1 and the locking sheet material 3 are adhered to the periphery of the mounting holes 2H, 2H, the absorbent pad is temporarily attached when the absorbent pad is replaced or when the position is adjusted. The non-woven fabric constituting the locking sheet material 3 by being dragged by the male fastener of the absorbent pad when the absorbent pad is detached from the diaper main body while assuming the reuse of the diaper main body X4 after being fixed to the main body It is possible to prevent the surface of the first locking element from being roughened due to the third fiber being pulled out from the mounting hole 2H. Therefore, there is no decrease in the fastening force between the absorbent pad and the paper diaper main body (the first locking element and the second locking element) even during re-adhesion, and the absorbent pad can be firmly fastened to the diaper main body.

<Others>
In addition, this invention is not necessarily limited to said embodiment. For example, the diaper main body parts X1 to X5 can use a technique of arranging elastic elastic members such as rubber thread used in absorbent articles such as fastening tape type paper diapers other than the illustrated ones in various places. Not too long. Adhesion at an appropriate position of the liquid-permeable top sheet, liquid-impervious back sheet, and locking sheet material, and adhesion at an appropriate position of the top sheet, absorber, and back sheet are known by hot melt adhesives, etc. The adhering technique may be used. Furthermore, in the said form, although locking with the 1st locking element and the 2nd locking element was based on the mechanical fastener mechanism, for example, the 1st locking element and the 2nd locking element are weakly adhered. It can also comprise so that these may adhere | attach as a material.
Here, in the first to fourth embodiments, the fastening tape type diaper main body is shown as an example. However, the diaper main body may be a so-called pant type having a waist opening and a leg opening. .
Moreover, in the said 1st-4th form, although the hole 2H for attachment is the form arranged in multiple numbers, it can also be set as the form arrange | positioned only in the suitable position of the diaper main-body part.

  The present invention can be used for disposable paper diapers for adults and children, tape-type and pants-type paper diapers.

It is a front view of the main-body part of the disposable paper diaper of the 1st form of this invention. It is the II-II sectional view. It is the III-III sectional view. It is a front view of the absorption pad of the disposable paper diaper of the 1st form of this invention. It is the VV sectional view. It is a front view for demonstrating fixation of a diaper main-body part and an absorption pad. It is sectional drawing for demonstrating the attachment of a diaper main-body part and an absorption pad. It is a front view which shows the state which made it offset to the front body side of a diaper main-body part, and fastened the absorption pad. It is a front view which shows the state which made it offset to the back body side of a diaper main-body part, and fastened the absorption pad. It is a front view of the main-body part of the 2nd form of this invention. It is a front view of the absorption pad of the 2nd form of this invention. It is a front view of the main-body part of the 3rd form of this invention. It is a front view of the absorption pad of the 3rd form of this invention. It is a front view of the main-body part of the 4th form of this invention. It is the XV-XV sectional view.

  DESCRIPTION OF SYMBOLS 1 ... Liquid-permeable top sheet, 2 ... Liquid-impermeable back sheet, 2H ... Mounting hole, 2He ... Mounting hole periphery, 2B ... Barrier cuff, 3 ... Locking sheet material, 3A ... 1st locking element 4 ... thread rubber, 5 ... hot melt adhesive, 10 ... top sheet, 11 ... back sheet, 12 ... absorber, 12A ... absorbent core, 13 ... crepe paper, 14 ... second locking element (male fastener), 14A ... male engagement part, 15 ... adhesive, 20 ... fastening tape, 21 ... fastening tape locking part, F ... front body, B ... back body, C ... groin, X1, X2, X3, X4 , X5 ... diaper main body, Y, Y1, Y2, Y3 ... absorbent pad, Z ... disposable paper diaper.

Claims (10)

A diaper main body portion in which a locking sheet material is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet;
An absorbent pad that is detachably fastened to the liquid-permeable top sheet side surface of the diaper main body, and that absorbs and retains body fluids therein,
The locking sheet material has body fluid absorbability and / or diffusibility,
A mounting hole is formed in the liquid-permeable top sheet, the locking sheet material is exposed from the mounting hole, and constitutes a first locking element,
A second locking element that engages with the locking sheet material is formed on the outer surface of the absorbent pad,
A disposable paper diaper wherein the absorbent pad is detachably secured to the diaper main body by the engagement of the second locking element and the first locking element. A diaper main body portion in which a locking sheet material is interposed between the liquid-permeable top sheet and the liquid-impermeable back sheet;
An absorbent pad that is detachably fastened to the liquid-permeable top sheet side surface of the diaper main body, and that absorbs and retains body fluids therein,
The locking sheet material has body fluid absorbability and / or diffusibility,
A plurality of mounting holes arranged in a line along the front-rear direction are formed in the liquid-permeable top sheet, and the locking sheet material is exposed from the mounting holes, whereby the first locking element Configure
A second locking element that engages with the locking sheet material is formed on the outer surface of the absorbent pad,
A disposable paper diaper wherein the absorbent pad is detachably secured to the diaper main body by the engagement of the second locking element and the first locking element. The absorbent pad includes two or more second locking elements, and a plurality of the two or more second locking elements are configured to engage with each of the plurality of first locking elements. The disposable paper diaper according to claim 2 . The disposable paper diaper according to any one of claims 1 to 3 , wherein the first locking element and the second locking element are mechanical fasteners. The disposable paper diaper according to claim 4 , wherein the second locking element is a male fastener. The disposable paper diaper according to any one of claims 1 to 5 , wherein the mounting hole formed in the liquid-permeable top sheet is circular or square in a front view. The disposable paper diaper according to any one of claims 1 to 6 , wherein the locking sheet material is a nonwoven fabric. The locking sheet material is a laminated material in which a nonwoven fabric is laminated and adhered to one surface of a porous film sheet, and the nonwoven fabric sheet surface of the laminated material is on the liquid-permeable top sheet side so that the liquid-permeable property is obtained. The disposable paper diaper according to any one of claims 1 to 6 , wherein the disposable paper diaper is interposed between the top sheet and the liquid-impermeable back sheet. The disposable paper diaper according to any one of claims 1 to 8 , wherein the liquid-permeable top sheet and the locking sheet material are bonded to each other at a peripheral edge of the mounting hole. The disposable paper diaper according to any one of claims 1 to 9 , wherein the locking sheet material is colored in a different color from the liquid-permeable top sheet.

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