JP2018051228A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach absorbent pads whose sizes are different to proper positions respectively.SOLUTION: A disposable diaper is configured so that pockets 71, 72 into which at least one end parts of front and rear end parts of absorbent pads P1, P2 are respectively provided on cross direction positions suitable for plural kinds of absorbent pads P1, P2 whose sizes are different, in a cross direction range corresponding to a free part 45 of a three-dimensional gathering 40 on a top sheet 11. The pockets 71, 72 are formed by folding the top sheet 11 in a cross direction LD so that a cross section becomes a Z-shape, and at least the pockets 71 positioned closest to a crotch side has an opening width regulation part 73 where at least a front side inner face part 11b and a rear side inner face part 11a on at least a part on an opening side of the pocket 71 are jointed, on each of both end parts in a width direction of an absorbent surface part provided on a front side of an absorber 13 on the top sheet 11.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a disposable diaper in which an absorbent pad can be attached at an appropriate position.

  The disposable diaper includes a top sheet that covers the front side of the absorbent body, and three-dimensional gathers that have free parts that rise on the skin side of the wearer on both sides of the absorbent surface part located on the front side of the absorbent body in the top sheet. What has extended along the direction is common (for example, refer patent document 1). By providing such a three-dimensional gather, excrement remains between the compatible body gathers, and in particular, leakage of excrement from the wearer's leg periphery is prevented. The three-dimensional gather is folded on the top sheet in the product state, and stands up when in use.

  For disposable diapers, use an absorbent pad (pad-type disposable diaper) for the purpose of urine absorption on the surface of the outer disposable diaper so that it is not necessary to replace the entire diaper when excreting a small amount. It is common to fix the absorbent pad to the surface of the outer disposable diaper by a locking means such as an adhesive layer provided on the back surface of the absorbent pad or a hook material (male material) of a hook-and-loop fastener (mechanical fastener) It has become. Such a use form is common in disposable diapers for adults.

  However, one of the causes of urine leakage when an absorbent pad is used in combination with a disposable diaper is that the absorbent pad is not mounted at an appropriate position. In normal cases, the disposable diaper and the absorbent pad have different dimensions, so that the appropriate mounting position of the absorbent pad is difficult to understand at a glance.

  In order to solve this problem, it has been proposed to put a mark on the outer disposable diaper or the absorbent pad, but this is not effective when a blind person is a caregiver or at night.

  On the other hand, a structure has also been proposed in which a pocket opening on the crotch side is provided on both the front and rear sides of the outer disposable diaper surface, and the absorbent pad is mounted by inserting the front and back of the absorbent pad into the pocket (see Patent Documents 1 to 4). ), This structure has an advantage that the absorbent pad can be attached without relying on the mark, and that the pocket prevents the urine, thereby improving the leakage prevention property. In this case, it is preferable to provide a plurality of pockets in the front-rear direction in order to accommodate the use of absorbent pads having different sizes.

  However, like the one described in Patent Document 2, in the case where a plurality of pockets extending in the width direction of the absorbent surface portion located on the front side of the absorbent body in the top sheet are provided in the front-rear direction, the pocket on the crotch side may become an obstacle. there were. That is, when the absorbent pad is mounted, the front and rear ends of the absorbent pad are inserted into pockets at positions suitable for the absorbent pad. At this time, in order to attach a somewhat large absorbent pad, it is necessary to place the absorbent pad over the crotch side pocket and insert the side of the absorbent pad to the back between the top sheet and the three-dimensional gather with a fingertip.

  However, if the pocket entrance hidden under the absorbent pad extends to both ends in the width direction of the absorbent surface portion of the top sheet, the side of the absorbent pad is inserted to the back of the top sheet and the three-dimensional gather. In some cases, the fingertip may accidentally enter the entrance of the pocket located under the absorbent pad. In this case, not only is the operation complicated due to the finger being caught, but the side of the absorbent pad is pushed into a pocket that is not used, and the mounting position of the absorbent pad may be shifted.

JP 2008-237391 A JP 2007-143890 A JP 2011-156110 A JP 2011-206218 A

  Then, the main subject of this invention is providing the disposable diaper which can mount | wear easily the absorption pad from which a magnitude | size differs in an appropriate position, respectively.

A typical aspect of the present invention that solves the above problems is as follows.
<First aspect>
A solid gather having a top sheet covering the front side of the absorbent body and having a free part standing on the skin side of the wearer on both sides of the absorbent surface part located on the front side of the absorbent body in the top sheet along the front-rear direction. Extended,
A front-rear direction position in which a pocket for inserting at least one end portion of the front and back of the absorbent pad fits in a plurality of types of absorbent pads having different sizes in a front-rear direction range corresponding to the free part of the three-dimensional gather on the top sheet In each disposable diaper provided in
A back side inner surface portion constituting an inner surface of the back side of the pocket by the top sheet, and a back position of the pocket at the bottom side position of the pocket in the back side inner surface portion and folded back to the crotch side and extending to an edge of the opening of the pocket. A front side inner surface portion constituting a front side inner surface, and a front side outer surface portion constituting an outer surface on the front side of the pocket which is folded to the front side and the waist side at an edge of the opening of the pocket in the front side inner surface portion, and the front side The non-bonded portion between the inner surface portion and the back side inner surface portion is an insertion space for the absorbent pad,
At least the pocket located at the most crotch side has opening width restricting portions where the front side inner surface portion and the back side inner surface portion of at least the opening side portion of the pocket are joined at both ends in the width direction of the absorption surface portion of the top sheet. doing,
A disposable diaper characterized by that.

(Function and effect)
In this aspect, since the pocket located at the most crotch side has the opening width restricting portion, the absorbent pad is arranged over the pocket on the most crotch side, and the side portion of the absorbent pad is attached to the top sheet with the fingertip. When inserting into the back of the three-dimensional gather, the entrance of the pocket located under the absorption pad is closed by the opening width restricting portion at the passage position of the fingertip, so the fingertip of the pocket located under the absorption pad It becomes difficult to enter the entrance. Therefore, the absorption pads having different sizes can be easily mounted at appropriate positions.

<Second aspect>
The disposable diaper of a 1st aspect with which the width | variety of the said opening width control part becomes narrow as the pocket located in a waist side.

(Function and effect)
The larger the absorbent pad, the longer the dimensions in the front-rear direction and the width direction. Therefore, it is preferable that the width of the opening width restricting portion changes as in this embodiment.

<Third Aspect>
The disposable diaper of the 1st or 2nd aspect with which the front side inner surface part and back side inner surface part in the said opening width control part are joined so that peeling is possible.

(Function and effect)
In this aspect, when an absorbent pad having a short length but a wide width is used, the opening width regulating portion can be peeled off and the opening width can be widened. In addition, when inserting the side of the absorbent pad to the back of the space between the top sheet and the three-dimensional gather, even if your fingertip accidentally enters the entrance of the pocket located under the absorbent pad, The opening width regulating portion is peeled off, and the mounting operation can be continued without removing the finger.

<Fourth aspect>
Between the said opening width control part of the width direction both sides, it has the temporary fix | stop part by which the front side inner surface part and the back side inner surface part in the part of the opening side of a pocket were joined so that peeling was possible. The disposable diaper of any one aspect.

(Function and effect)
By having such a temporary fixing part, when attaching the absorbent pad, if there is a temporary fixing part at the entrance of the pocket to be used, remove the temporary fixing and open the entire pocket, and the pocket not to be used The opening of the pocket can be closed so that the opening of the pocket does not interfere with the mounting operation without removing the temporary fixing portion.

<Fifth aspect>
A disposable diaper according to a fourth aspect, wherein a hook material of a mechanical fastener is provided on a front side inner surface portion of the temporary fixing portion, and the hook material is detachably joined to the back side inner surface portion.

(Function and effect)
The surface of most disposable diapers and absorbent pads is formed of a non-woven fabric so that the hook material of a mechanical fastener can be releasably joined. Therefore, if the temporary fixing portion is made of a hook material as in this embodiment, not only can the pocket be temporarily fixed and opened, but the front side inner surface portion of the pocket can be placed on the surface of the absorbent pad inserted into the opened pocket. The absorbent pad can be more firmly fixed by joining the hook materials in a peelable manner.

  As described above, according to the present invention, there are advantages such that the absorbent pads having different sizes can be easily mounted at appropriate positions.

It is a top view (inner surface side) of the underpants type disposable diaper of a deployment state. It is a top view (outer surface side) of the underpants type disposable diaper of a deployment state. It is a top view of an interior body. (A) 2-2 sectional drawing of FIG. 1, (b) It is 3-3 sectional drawing of FIG. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 in FIG. 1. It is a perspective view of the wearing state of a pants type disposable diaper. It is a top view which shows the principal part of underpants type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 in FIG. It is a perspective view which shows the principal part of a pants type disposable diaper. It is 2-2 sectional drawing of FIG. 1 which shows an absorption pad mounting state. FIG. 6 is a cross-sectional view taken along 6-6 in FIG. (A) 7-7 sectional drawing of FIG. 1 which shows an absorption pad mounting state, (b) 6-6 sectional drawing of FIG. 1 which shows an absorption pad mounting state. It is a top view which shows the inner surface side of the expansion | deployment state of a tape type disposable diaper. It is a top view which shows the outer surface side of the expansion | deployment state of a tape type disposable diaper. It is 5-5 sectional drawing of FIG. (A) It is 4-4 sectional drawing of FIG. 14, (b) It is 6-6 sectional drawing of FIG. (A) 2-2 sectional drawing of FIG. 14, (b) (c) It is 2-2 sectional drawing of FIG. 14 which shows an absorption pad mounting | wearing state. FIG. 6 is a sectional view taken along line 6-6 in FIG. (A) 7-7 sectional view of Drawing 14 showing an absorption pad wearing state, (b) 6-6 sectional view of Drawing 14 showing an absorption pad wearing state. It is a top view of an interior body. FIG. 6 is a sectional view taken along line 6-6 in FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, the dot pattern part in a figure has shown joining means, such as a hot-melt-adhesive agent.
<Example of pants-type disposable diapers>
1 to 8 show an example of a pants-type disposable diaper. This pants-type disposable diaper (hereinafter also simply referred to as a diaper) has an outer body 20 that integrally constitutes a front body F and a rear body B, and an inner surface of the outer body 20 so as to extend from the front body F to the rear body B. The interior body 10 has a fixed interior body 10, and the interior body 10 has an absorbent body 13 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable sheet 12. For example, at the time of manufacture, after the back surface of the interior body 10 is joined to the inner surface (upper surface) of the exterior body 20 by a joining means such as a hot-melt adhesive (dotted portion in FIG. 2), the interior body 10 and the exterior The body 20 is folded at the center in the front-rear direction LD (vertical direction) that is the boundary between the front body F and the back body B, and both side portions thereof are joined to each other by heat welding or hot melt adhesive to form the side seal portion 21. By doing so, a pants-type disposable diaper having a waist opening and a pair of left and right leg openings is formed.

(Structural example of interior body)
As shown in FIGS. 4 to 6, the interior body 10 has a structure in which an absorber 13 is interposed between a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a liquid-impermeable sheet 12 made of polyethylene or the like. It absorbs and retains the excreted liquid that has permeated through the top sheet 11. Although the planar shape of the interior body 10 is not particularly limited, it is generally a substantially rectangular shape as illustrated.

  As the liquid-permeable top sheet 11 that covers the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, natural fibers such as cotton, and the spunlace method. A nonwoven fabric obtained by an appropriate processing method such as a spun bond 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. When a large number of through holes are formed in the liquid permeable top sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The top sheet 11 is wound around the side edge of the absorbent body 13 and extends to the back surface side of the absorbent body 13.

  The liquid-impermeable sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13 is a liquid-impermeable plastic sheet such as polyethylene or polypropylene. What has is used suitably. This water-impervious and moisture-permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. is there.

  Absorbent body 13 is a known material, for example, a pulp fiber stack, a collection of filaments such as cellulose acetate, or a non-woven fabric, mixed with a superabsorbent polymer as necessary, fixed, etc. Can be used. The absorbent body 13 can be packaged with a wrapping sheet 14 having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer.

  The overall shape of the absorbent body 13 is formed in a substantially hourglass shape having a narrowed portion 13N having a narrower width than the front and rear sides at the crotch portion, but may have an appropriate shape such as a rectangular shape. Although the size of the constricted portion 13N can be determined as appropriate, the length in the front-rear direction of the constricted portion 13N can be about 20 to 50% of the total length of the diaper, and the width of the narrowest portion is 40% of the total width of the absorber 13. It can be about -60%. In the case where the constricted portion 13N is provided, if the planar shape of the interior body 10 is substantially rectangular, the remainder of the interior body 10 that does not include the absorber 13 in the portion corresponding to the constricted portion 13N of the absorber 13. A part is formed.

  On both sides of the absorption surface portion located on the front side of the absorbent body 13 in the top sheet 11, three-dimensional gathers 40 rising on the skin side of the wearer are respectively extended along the front-rear direction LD. As shown in FIGS. 5 and 6, the three-dimensional gather 40 includes a fixed portion 43 fixed to the side portion on the back surface of the interior body 10, and the interior body 10 through the side of the interior body 10 from the fixed portion 43. A body portion 44 extending to the side of the surface of the body, a front-rear end portion of the body portion 44 in a lying state, and a lying portion 47 formed by being fixed to a side portion of the surface of the interior body 10, and in the front-rear direction LD It has the free part 45 formed between the lodging parts 47 without being fixed. Each of these parts is formed by a three-dimensional gather sheet 41 which is turned into a double sheet by folding. As the three-dimensional gather sheet 41, a non-woven fabric having water repellency is preferably used.

  In addition, an elongated three-dimensional gather elastic member 42 is disposed between the sheets of the double sheet at the tip of the free part. The three-dimensional gather elastic member 42 is for forming a three-dimensional gather 40 by raising a free portion protruding from the absorber side edge by elastic expansion and contraction as shown by a two-dot chain line in FIG. 5 in the product state.

  The liquid-impermeable sheet 12 is folded back on the both sides in the width direction of the absorber 13 together with the liquid-permeable top sheet 11. As this liquid-impermeable sheet 12, it is desirable to use an opaque sheet so that brown color such as defecation and urine does not appear. As the opacification, a plastic film and a pigment and filler such as calcium carbonate, titanium oxide, zinc oxide, white carbon, clay, talc and barium sulfate are preferably used.

  As the three-dimensional gather elastic member 42, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester and the like that are usually used can be used. In order to make it difficult to see from the outside, it is preferable that the thickness is 925 dtex or less, the tension is 150 to 350%, and the interval is 10 mm or less. As the three-dimensional gather elastic member 42, a tape-like member having a certain width can be used in addition to the thread-like shape shown in the figure.

  In the same manner as the liquid-permeable top sheet 11, the material fibers constituting the above-described three-dimensional gather sheet 41 are olefin-based, such as polyethylene or polypropylene, polyester-based, amide-based synthetic fibers, regenerated fibers such as rayon and cupra, Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. It is preferable to use a non-woven fabric with a low basis weight and excellent air permeability. Furthermore, with respect to the three-dimensional gather sheet 41, in order to prevent the transmission of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), a silicon-based, paraffin metal-based, alkylchromic chromoid-based water repellent It is desirable to use a water-repellent non-woven fabric coated with such as.

(External body structure example)
The exterior body 20 has a part constituting the front body F extending from the center in the front-rear direction to the ventral side and a part constituting the back body B extending from the center in the front-rear direction to the back side. The side seal part 21 is formed by joining both side parts of the back body B and both side parts of the back body B, and as shown in FIG. 7, a pair of left and right sides for passing the waist opening and legs for passing the wearer's torso Leg openings are formed.
The exterior body 20 includes a waist portion T defined as a longitudinal range (a longitudinal range extending from the waist opening to the upper end of the leg opening) having the side seal portion 21, and a longitudinal range (front body F) of a portion forming the leg opening. Leg opening L defined between the vertical region having the side seal part 21 and the vertical region having the side seal part 21 of the back body B. The waistline portion T can be divided into a waist portion W that conceptually forms an edge portion of the waist opening and a waist lower portion U that is a lower portion than this. Usually, in the case where there is a boundary (for example, the thickness or elongation rate of the elastic member changes) in the waist circumference portion T, the waist opening side becomes the waist portion W rather than the boundary on the waist opening side, When there is no such boundary, the waist opening side becomes the waist part W from the absorber 13 or the interior body 10.

  As shown in FIGS. 4 to 6, the exterior body 20 has a two-layer structure including a press sheet 20 </ b> A and a back sheet 20 </ b> B each made of a nonwoven fabric or the like, between the press sheet 20 </ b> A and the back sheet 20 </ b> B, and the back Various elastic members are disposed between the nonwoven fabrics of the folded portion 20C formed by folding the sheet 20B to the inner surface side at the waist opening edge, and elasticity is imparted. The planar shape has a pseudo hourglass shape as a whole by the concave leg surrounding lines 29 formed to form leg openings on both sides of the middle.

  In the front body F and the back body B, the exterior body 20 in the illustrated form includes a waist elastic member 24 disposed in the waist W and a waist disposed in the waist lower part U as elastic members along the width direction WD. While having the lower part elastic member 25 and the leg opening elastic member 27 arrange | positioned at the leg opening part L, it is curving in the pattern which goes to a crotch part from the side seal part 21 along a monopod opening separately from these. The curved elastic members 26 and 28 are provided. These elastic members 24 to 28 are fixed in a state of being stretched at a predetermined stretch rate along their extending directions. In addition, in this exterior body 20, what is called a leg periphery elastic member which continues from the side seal part of the front body F to the side seal part of the back body B along the leg periphery line 29 is not provided.

  The waist elastic member 24 is for tightening the wearer's waist with elasticity. In the illustrated example, the elastic elastic member 24 is an elongated elastic member such as a rubber thread attached in an extended state along the width direction WD between the layers in the waist W. A plurality of members are provided at intervals in the vertical direction. For the waist elastic member 24, rubber thread is used in the illustrated example. However, for example, a tape-like elastic member may be used. Moreover, although the waist part elastic member 24 of the illustration form is clamped between the nonwoven fabrics of the folding | returning part 20C of the back sheet 20B in a waist part, you may clamp between 20 A of pressing sheets, and the back sheet 20B. The waist elastic member 24 is desirably provided over the entire width direction of the waist W.

  The waist lower part elastic member 25 is for attaching the diaper to the lower abdomen and the buttocks of the wearer with elasticity, and in the illustrated example, is attached in an expanded state along the width direction WD between the layers in the waist lower part U. A plurality of elongated elastic members such as rubber thread are provided at intervals in the vertical direction. It is desirable that the waist lower part elastic member 25 is provided on both sides in the width direction of the intermediate part in the width direction of the absorber in the waist lower part U, and the side edges are provided up to the side seal part 21.

  The leg opening elastic member 27 is mainly for giving stretchability in the width direction WD to a portion along the leg opening. In the illustrated example, the leg opening elastic member 27 is attached in an extended state along the width direction WD between the layers in the leg opening L. A plurality of elongated elastic members such as rubber thread are provided, and a plurality of elastic members are provided at intervals in the vertical direction. It is desirable that the leg opening elastic member 27 is provided at least on both sides in the width direction of the intermediate part in the width direction of the absorber of the leg opening L, and the side edge is provided up to the leg opening edge 29.

  In the range from the waist portion T to the leg opening L in the exterior body 20, apart from the waist elastic member 24, the waist lower elastic member 25, and the leg opening elastic member 27, an elongated elastic member such as thread rubber is used. The curved elastic members 26 and 28 are arranged along a predetermined curve. Although the number of the curved elastic members 26 may be one, it is preferable that there are a plurality of curved elastic members 26. In the illustrated example, the elastic members 26 are elongated elastic members such as four rubber threads, and the curved elastic members 26 and 28 intersect each other. Without being spaced apart. The curved elastic members 26 and 28 are arranged in a bundle of about two or three elastic members with a close interval, and 3 to 20 mm, preferably 6 to form a predetermined stretch zone. Three or more, preferably four or more are arranged with an interval of about ˜16 mm.

  As shown in FIG. 8, the waist lower part elastic member 25, the leg opening elastic member 27 and the curved elastic members 26, 28 arranged on the outer body 20 are continuously fixed to the outer body 20 at the time of manufacture. Later, a part or all of the portion overlapping with the absorber 13 is finely cut with a predetermined cutting pattern CP to be a non-shrinking portion where the contracting force does not act (that is, the portion overlapping with the cutting pattern CP in FIG. 8). A portion extending laterally from the non-shrinkable portion is a contracted portion where contractive force acts (that is, the waist lower elastic member 25 and the curved elastic members 26 and 28 on the side of the cutting pattern CP in FIG. Left part). For this reason, the waist lower part elastic member 25, the leg opening elastic member 27, and the curved elastic members 26, 28 extend from the side seal part 21 on one side to the side seal part 21 on the other (opposite) side across the absorber 13. After providing continuously, a part or all of the part which overlaps with the absorber 13 is cut | disconnected finely. Thereby, the unnecessary shrinkage | contraction of the width direction WD of the absorber 13 can be prevented. Of course, the waist lower part elastic member 25, the leg opening elastic member 27, and the curved elastic members 26, 28 can also be arranged continuously across the absorber 13. As can be understood from these, in the present invention, “the elastic member is provided” means that the elastic member portion is provided with a contracting portion on which the contracting force acts, and the elastic member contracts. The non-contracted portion where the force is killed by cutting is not included in “the elastic member is provided”.

  The exterior body 20 mentioned above can be manufactured by the technique of Unexamined-Japanese-Patent No. 4-28363 or Unexamined-Japanese-Patent No. 11-332913, for example. Moreover, in order to cut | disconnect the curved elastic members 26 and 28 on the interior body 10, it describes in Unexamined-Japanese-Patent No. 2002-35029, Unexamined-Japanese-Patent No. 2002-178428, and Unexamined-Japanese-Patent No. 2002-273808. A cutting method is preferably employed.

  Unlike the illustrated example, the curved elastic members 26 and 28 may be provided only on one of the front body F and the back body B. When the curved elastic members 26 and 28 are provided on both the front body F and the back body B, a part or all of the group of the curved elastic members 28 disposed on the front body F side and the back body B side are disposed. Although a form (not shown) in which a part or all of the group of curved elastic members 26 formed can be adopted, the group of curved elastic members 28 arranged on the front body F side as shown in the example, A configuration in which the curved elastic members 26 arranged on the back body B side are separated from each other in the longitudinal direction at a position slightly deviated from the front-rear direction intermediate portion, particularly the front body F without crossing each other.

  Further, the curved elastic members 26 and 28 do not have to be entirely curved, and may partially have a linear portion.

  Although the elongation rate at the time of attachment of the elastic members 24 to 28 can be determined as appropriate, in the case of a normal adult, the waist elastic member 24 is about 160 to 320%, the waist lower elastic member 25 and the leg opening elastic member. 27 may be approximately 160 to 320%, and the curved elastic members 26 and 28 may be approximately 230 to 320%.

(Front and back cover sheet)
As shown in FIGS. 1 and 4, in order to cover the front and rear end portions of the interior body 10 attached on the inner surface of the exterior body 20 and to prevent leakage from the front and rear edges of the interior body 10, 22 and 23 may be provided. Explaining in more detail about the illustrated form, the front cover sheet 22 extends over the entire width direction from the inner surface of the folded portion 20C of the waist side end portion of the front body F to the position overlapping the front end portion of the interior body 10. The rear presser sheet 23 extends from the inner surface of the folded back portion 20 </ b> C at the waist side end portion to the position overlapping the rear end portion of the interior body 10 in the rear body B inner surface. If a slight non-adhesive part is provided in the crotch side edges of the front and rear presser sheets 22 and 23 over the entire width direction WD (only the central part may be provided), not only the adhesive does not stick out, but this part is also used as the top sheet. It can be lifted slightly to function as a leak-proof wall.

  If the front and rear presser sheets 22 and 23 are attached separately as in the illustrated form, there is an advantage that the degree of freedom of material selection is increased, but there are also disadvantages such as an increase in materials and manufacturing processes. Therefore, the folded portion 20C formed by folding the exterior body 20 on the inner surface of the diaper can be extended to a portion overlapping the interior body 10 to form a portion equivalent to the presser sheets 22 and 23 described above.

  In the above example, the front body F to the back body B are continuously covered by the integrated exterior body 12, but the exterior body is divided into those constituting the front body F and those constituting the back body B. The outer body of the front body F and the outer body of the rear body B are not continuous on the crotch side and can be separated (not shown). In this case, the outer body of the front body has at least a portion that overlaps with the vertically stretchable portion, portions on both sides in the width direction, and portions on the waist opening side. Moreover, the back surface of the interior body can be covered with a crotch outer body such as a nonwoven fabric.

<Example of tape-type disposable diapers>
14 to 17 show an example of a tape-type disposable diaper. The disposable diaper covers the absorbent body 13, the liquid-permeable top sheet 11 that covers the front side of the absorbent body 13, and the back side of the absorbent body 13. A liquid-impermeable sheet 12. The absorber 13 can be wrapped with a packaging sheet (not shown). As these materials, the same material as the pants type can be used.

  In order to make the outer surface of the diaper look and feel like cloth, the entire back surface of the liquid-impermeable sheet 12 is covered with an exterior sheet 20D, and the outer peripheral edges of both sheets 11 and 12 extend to the outer peripheral edge of the diaper. Yes. Various nonwoven fabrics can be used as the exterior sheet 20D, but a spunbond nonwoven fabric is preferable. The exterior sheet 20D can be omitted.

  The top sheet 11 extends outward from the periphery of the absorber 13, and a portion extending outward from the side edge of the absorber 13 is fixed to the liquid-impermeable sheet 12 with a hot melt adhesive or the like. In addition, the dot pattern in a figure represents the adhering part.

  As shown in FIGS. 14, 16, and 17, three-dimensional gathers 40 that stand on the skin side of the wearer are respectively provided in the front-rear direction on both sides of the absorption surface portion of the top sheet 11 that is located on the front side of the absorbent body 13. It extends along the LD. More specifically, the fixing portion 43 on the outer side in the width direction of the three-dimensional gather sheet 41 constituting the three-dimensional gather 40 is formed on the surface of the liquid-impermeable sheet 12 that extends laterally from the side edge portion surface of the top sheet 11. Is affixed over the entire longitudinal direction. The three-dimensional gather sheet 41 can use various non-woven fabrics (preferably spunbond non-woven fabrics), plastic films similar to those used for back sheets, or laminated sheets thereof. In this respect, a nonwoven fabric subjected to water repellent treatment is preferable. The body portion 44 on the center side in the width direction of the three-dimensional gather sheet 41 is fixed to the inner surface of the article (in the illustrated form, the surface of the top sheet 11) by means of a hot-melt adhesive, etc. However, the intermediate part between them is an unfixed free part 45, and the free part 45 has an elongated three-dimensional object at the tip of the free part 45 (end in the center in the width direction in the unfolded state). The gather elastic member 42 is fixed by a hot melt adhesive or the like in a state of being stretched along the front-rear direction LD. In the illustrated example, a plurality of the three-dimensional gathered elastic members 42 are provided at predetermined intervals, but one may be used. As shown in FIG. 17, the free portion 45 constitutes a three-dimensional gather that rises with respect to the inner surface of the article (the surface of the top sheet 11 in the illustrated embodiment) as a result of the contraction force of the three-dimensional gather elastic member 42 acting. The rising positions 46 of the rising portions serve as a boundary between the fixing portion 43 on the outer side in the width direction and the inner portion 44 in the three-dimensional gather 4, and are positioned at both ends in the width direction of the absorption surface portion of the top sheet.

  At both ends in the front-rear direction of the disposable diaper 100, the liquid-impermeable sheet 12, the exterior sheet 20D, the liquid-permeable top sheet 11, and the three-dimensional gather sheet 41 are respectively extended from the front and rear ends of the absorbent body 13 to the front and rear sides. An end flap portion EF in which the body 13 does not exist is formed. On the other hand, on the left and right sides of the disposable diaper 100, the liquid-impermeable sheet 12, the exterior sheet 20D, the liquid-permeable top sheet 11 and the three-dimensional gathered sheet 41 are respectively extended from the side edges of the absorber 13, respectively. A side flap portion SF in which the absorber 13 does not exist is formed. Of the side flap portion SF, the portions located in the waist portion of the ventral portion F and the waist portion of the dorsal portion B are extended laterally from the intermediate portion therebetween, and these portions However, it becomes a waist part of a diaper, an intermediate part becomes the leg surrounding part LH, and the both side edges become the leg Le of the leg opening.

An elongated elastic member 48 is fixed to the middle portion of the side flap portion SF in the front-rear direction between the liquid-impermeable sheet 12 and the exterior sheet 20D by a hot melt adhesive or the like in the stretched state along the front-rear direction LD. A so-called flat gather is formed in the side flap portion SF by the contraction of the elongated elastic member 48. By this flat gather, the side part of the diaper is elastically stretched to fit around the leg.
A fastening tape 50 protruding from the side edge is attached to the side flap portion SF of the back portion B, and a front target tape 60 is attached to the surface of the waist portion of the ventral portion F along the width direction WD. When the diaper 100 is applied to the body, the fastening tape 50 on both sides is turned from each side of the waist to the abdominal outer surface and is fastened to the front target tape 60. The front target tape 60 can be omitted. In this case, the fastening tape 50 is directly fixed to the outer surface of the diaper (in the illustrated embodiment, the exterior sheet 20D).

  As shown in FIG. 16, the fastening tape 50 includes a fixing portion 51 that is fixed between sheets in the waist-side side flap portion SF of the back portion B by means such as a hot melt adhesive, and the side flap portion SF side. The protrusion 52 has a protrusion 52 that protrudes outward in the width direction from between the sheets on the edge. The protrusion 52 has a distal end 53 and a main body 54 that is proximal to the distal end 53. . On the inner surface side (liquid permeable surface sheet 2 side) of the front end portion 53 of the fastening tape 50, as a connecting portion for connection with the target tape 60, a hook material (mechanical fastener (surface Fastener (male material) 55 is attached, and front target tape 60 having a surface on which a hook-like protrusion is removably hooked (female fastener (surface fastener) female material) 6 is attached. . The material of the outer surface of the diaper itself is used in place of the front target tape 60, or an adhesive layer is used in place of the hook material 55, and a resin tape having a smooth adhesive surface is used as the front target tape 60. be able to.

  As shown in FIGS. 14 and 15, the fastening tape 50 is provided with a perforation 56 extending in the width direction WD from the outer edge in the width direction at the intermediate portion in the vertical direction to the inside of the main body portion 54. By separating the eyes 56, each can be separated into an upper stage and a lower stage provided with a fixing part, a main body part, a tip part and a connecting part. Instead of the perforation 56, it may be previously separated by cutting or the like. Such a fastening tape 50 can be detachably connected to the front target tape 60 in the abdominal side portion in a state where the upper step portion and the lower step portion are crossed. Of course, the present invention is not limited to the upper and lower two-stage division type, and can be applied to other known fastening tapes such as a type that does not divide into two stages.

<Absorption pad insertion pocket>
In the pants-type disposable diaper, as shown in FIGS. 1, 3, 4, and 9-13, and in the tape-type disposable diaper, as shown in FIGS. Pockets 71 and 72 for inserting at least one of the front and rear ends of the absorbent pads P1 and P2 in the front-rear direction range corresponding to the free portion 45 of the gather 40 are adapted to a plurality of types of absorbent pads P1 and P2 having different sizes It is provided at each position in the front-rear direction. Further, the top sheet 11 is folded back to the front side and the crotch side at the bottom position of the pockets 71 and 72 on the back side inner surface part 11a constituting the inner surface of the back side of the pockets 71 and 72. The front side inner surface portion 11b constituting the front side inner surface of the pockets 71, 72 extending to the edge of the opening, and the front surface and the waist side at the edge of the opening of the pocket 71, 72 in the front side inner surface portion 11b are folded back to the pocket 71, 72, A front-side outer surface portion 11c constituting the outer surface on the front side of 72 is formed. That is, the top sheet 11 is folded back in a Z-shaped cross section, and a non-joining portion between the front side inner surface portion 11b and the back side inner surface portion 11a is an insertion space for the absorption pads P1 and P2. The front side inner surface portion 11b and the front side outer surface portion 11c are preferably bonded to each other by a bonding means such as a hot-melt adhesive, but can be unbonded.

  In the illustrated embodiment, a plurality of pockets 71 and 72 that open to the crotch side are provided on both sides in the front-rear direction, but only the pockets 71 and 72 that open to the crotch side are provided on only one side of the front-rear direction LD. But you can.

  The number of pockets 71 and 72 can be determined as long as there are a plurality of pockets, but in the normal case, it is preferably about 2 to 5 and particularly about 2 to 3 per one side of the front and rear.

  The front and rear direction positions of the edges of the openings of the pockets 71 and 72 may be determined as appropriate. In normal cases, when the center position in the front and rear direction of the disposable diaper is 0% and the waist side edge is 100%, 75 to 100 It is preferable that all the pockets 71 and 72 are open within the range of%. Moreover, it is preferable that the space | interval of the front-back direction LD of the edge of the opening of pockets 71 and 72 shall be about 50-100 mm.

  Although the depth of each pocket 71 and 72 can be determined suitably, it is preferable to set it as about 10-30 mm normally. Moreover, it is preferable that the depth of each pocket 71 and 72 is below the space | interval of the front-back direction of the opening of the said pocket 71 and 72 and the opening of the pockets 71 and 72 adjacent to a waist side. The depths of the pockets 71 and 72 can be different. For example, the pockets 71 and 72 on the waist side are preferably formed deeper.

  Characteristically, at least the pockets 71 located on the most crotch side are at both ends in the width direction of the absorbent surface portion located on the front side of the absorbent body in the top sheet 11 and at least the front side inner surface in the opening side portion of the pocket 71. It has the opening width control part 73 to which the part 11b and the back side inner surface part 11a were joined. Thus, when the pocket 71 located at least on the crotch side has the opening width restricting portion 73, there are the following advantages. That is, in the case of using a relatively small absorbent pad P1 having a mounting position suitable for the most crotch pocket 71, in the pants-type disposable diaper, as shown in FIGS. In the type disposable diaper, as shown in FIGS. 18B and 19, the front and rear end portions of the absorbent pad P1 are inserted into pockets 71 located on the most crotch side provided on the front side and the rear side of the disposable diaper, respectively. . At this time, there is no pocket under the absorbent pad P2. On the other hand, as shown in FIGS. 11 (b) and 13 in a pants-type disposable diaper and as shown in FIGS. 18 (c) and 20 in a tape-type disposable diaper, a relatively large absorbent pad. When using P2, the absorbent pad P2 is disposed over the crotch side pocket 71, and the front and rear end portions of the absorbent pad P1 are placed in the pocket 72 on the waist side provided respectively on the front side and the rear side of the disposable diaper. Plug in. At this time, the side of the absorbent pad P2 may be inserted to the back between the top sheet 11 and the three-dimensional gather 40 with a fingertip, but in a pants-type disposable diaper, as shown in FIG. In the disposable diaper, as shown in FIG. 20 (b), the entrance of the pocket 71 located below the absorbent pad P2 is closed by the opening width restricting portion 73 at the passage position of the fingertip. It becomes difficult to enter the entrance of the pocket 71 located below. Therefore, the absorption pads P1 and P2 having different sizes can be easily mounted at appropriate positions.

  The opening width restricting portion 73 can be provided in all the pockets 71 and 72, or it can be in a form not provided in some of the pockets 72 on the waist side as shown in the figure. In particular, since the larger absorption pad P2 has longer dimensions in the front-rear direction LD and the width direction WD, the width of the opening width restricting portion 73 is narrower as the pocket 72 located on the waist side (that is, the opening width is wider). And preferred. This form includes the case where the width of the opening width restricting portion 73 in the pocket 72 on the waist side becomes zero, that is, the case where there is no opening width restricting portion 73.

  As long as the opening width restricting portion 73 (joint portion) is provided at least in the opening side portion of the pocket 71, the dimension in the front-rear direction is not particularly limited, and extends substantially over the entire front-rear direction LD of the pocket 71 as shown in the figure. Even if it is provided, it may be provided only at the edge of the opening of the pocket 71.

  The joint between the front side inner surface part 11b and the back side inner surface part 11a in the opening width regulating part 73 may be peelable. Thereby, when using an absorption pad with a short width but a wide width, the opening width restricting portion 73 can be peeled off, and the opening width can be widened and mounted. Further, when the side of the absorbent pad P2 is inserted into the space between the top sheet 11 and the three-dimensional gather 40, even if the fingertip accidentally enters the entrance of the pocket 71 located under the absorbent pad P2. The opening width restricting portion 73 is peeled off by being pushed forward as it is, and the mounting operation can be continued without removing the finger. In order to join the front side inner surface part 11b and the back side inner surface part 11a so as to be peelable at the opening width regulating part 73, in addition to weakening the bonding itself by hot melt adhesive or welding, a mechanical fastener as well as a temporary fixing part to be described later It is also possible to use a detachable joining means such as a hook material. Reference numeral 73m in the figure indicates an interposition-type joining means such as a hot melt adhesive or a hook material.

  On the other hand, as shown in FIGS. 21 and 22, between the opening width restricting portions 73 on both sides in the width direction, at least the front side inner surface portion 11b and the back side inner surface portion 11a in the opening side portion of the pocket 71 are detachably joined. It is also a preferable form to have a temporary fixing portion 74 formed. In the illustrated embodiment, the temporary fixing portion is provided only in the pocket 71 located closest to the crotch side, but the temporary fixing portion 74 may be provided in the pocket 72 on the waist side. As long as the temporary fixing portion 74 is between the opening width restricting portions 73 on both sides in the width direction, the temporary fixing portion 74 may be provided in the center portion in the width direction as illustrated, or may be provided over the entire width direction or on both sides in the width direction. it can. By having such a temporary fixing portion 74, when mounting a relatively large absorbent pad PP2, the end of the absorbent pad 72 in the front-rear direction LD is connected to the waist-side pocket 72 (the pocket 72 to be used). If the entrance has a temporary fastening portion 74, the temporary fastening is removed and opened), and the entrance of the pocket 71 that is not used is not removed, and the opening of the pocket 71 does not interfere with the mounting operation. Can be kept closed.

  In order to bond the front side inner surface portion 11b and the back side inner surface portion 11a so as to be peelable by the temporary fixing portion 74, in addition to weakening the bonding itself by hot melt adhesive or welding, a removable bonding such as a hook material of a mechanical fastener Means can also be used. Reference numeral 74m in the figure indicates an interposition-type joining means such as a hot melt adhesive or a hook material. In particular, it is preferable that a temporary fixing portion 74 made of a hook material is provided on the front side inner surface portion 11b, and the hook material is detachably joined to the back side inner surface portion 11a. That is, the surface of most disposable diapers / absorption pads P1, P2 is formed of a non-woven fabric so that the hook material of the mechanical fastener can be joined in a peelable manner. Therefore, when the temporary fixing portion 74 is made of a hook material as in this embodiment, not only can the pocket 71 be temporarily fixed and opened, but the pocket 71 can be formed on the surface of the absorbent pad P1 inserted into the opened pocket 71. The absorption pad P1 can be more firmly fixed by joining the hook material of the front side inner surface part 11b of 71 so that peeling is possible.

<Explanation of terms in the specification>
When the following terms are used in the specification, they have the following meanings unless otherwise specified in the specification.
The “front-rear direction” means a direction connecting the ventral side (front side) and the back side (rear side), and “width direction” means a direction (left-right direction) orthogonal to the front-rear direction.
-"Developed state" means a state where the plate is flattened without contraction or slack.
“Elongation rate” means a value when the natural length is 100%.
-"Thickness" is automatically measured under the conditions of load: 10 gf / cm <2> and pressure area: 2 cm <2> using an automatic thickness meter (KES-G5 handy compression tester).
・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ± 5 ℃, relative humidity 65% or less). .
-Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.

  The present invention can be used for all disposable diapers such as the pants type and the tape type as in the above example.

  B ... Rear body, F ... Front body, L ... Leg opening, P1, P2 ... Absorption pad, T ... Trunk circumference, U ... Waist lower part, W ... Waist part, LD ... Front-back direction, WD ... Width direction, DESCRIPTION OF SYMBOLS 10 ... Interior body, 11 ... Top sheet, 11a ... Back side inner surface part, 11b ... Front side inner surface part, 11c ... Front side outer surface part, 12 ... Liquid impervious sheet, 13 ... Absorber, 13N ... Constricted part, 14 ... Packaging sheet , 20 ... exterior body, 20C ... folded portion, 21 ... side seal portion, 24 ... waist elastic member, 25 ... waist lower elastic member, 26, 28 ... curved elastic member, 27 ... leg opening elastic member, 29 ... Leg circumference line, 40 ... Solid gather, 41 ... Solid gather sheet, 42 ... Solid gather elastic member, 71, 72 ... Pocket, 73 ... Opening width restricting part, 74 ... Temporary fixing part.

Claims (5)

A solid gather having a top sheet covering the front side of the absorbent body and having a free part standing on the skin side of the wearer on both sides of the absorbent surface part located on the front side of the absorbent body in the top sheet along the front-rear direction. Extended,
A front-rear direction position in which a pocket for inserting at least one end portion of the front and back of the absorbent pad fits in a plurality of types of absorbent pads having different sizes in a front-rear direction range corresponding to the free part of the three-dimensional gather on the top sheet In each disposable diaper provided in
A back side inner surface portion constituting an inner surface of the back side of the pocket by the top sheet, and a back position of the pocket at the bottom side position of the pocket in the back side inner surface portion and folded back to the crotch side and extending to an edge of the opening of the pocket. A front side inner surface portion constituting a front side inner surface, and a front side outer surface portion constituting an outer surface on the front side of the pocket which is folded to the front side and the waist side at an edge of the opening of the pocket in the front side inner surface portion, and the front side The non-bonded portion between the inner surface portion and the back side inner surface portion is an insertion space for the absorbent pad,
At least the pocket located at the most crotch side has opening width restricting portions where the front side inner surface portion and the back side inner surface portion of at least the opening side portion of the pocket are joined at both ends in the width direction of the absorption surface portion of the top sheet. doing,
A disposable diaper characterized by that.   The disposable diaper according to claim 1, wherein a width of the opening width restricting portion is narrower toward a pocket located on a waist side.   The disposable diaper of Claim 1 or 2 with which the front side inner surface part and back side inner surface part in the said opening width control part are joined so that peeling is possible.   Between the said opening width control part of the width direction both sides, it has the temporary fix | stop part by which the front side inner surface part and the back side inner surface part in the part of the opening side of a pocket were joined so that peeling was possible. The disposable diaper of any one of these.   The disposable diaper according to claim 4, wherein a hook material of a mechanical fastener is provided on a front side inner surface portion of the temporary fixing portion, and the hook material is detachably joined to the back side inner surface portion.

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