JP6860393B2 - Absorbent article - Google Patents

Description

The present invention relates to an absorbent article.

The absorbent article generally has an absorber, a top sheet that covers the front side of the absorber, and rising gathers that rise from both sides of the top sheet (see, for example, Patent Documents 1 and 2). In an absorbent article having such rising gathers, the movement of excrement fluid such as urine temporarily present on the top sheet after excretion is prevented by the rising gathers, and the excretory fluid rises and stays between the gathers, in particular. Leakage of excrement from the wearer's leg circumference is prevented.

Getting up gathers are now so widespread that they are essential, but they are known to have the following problems. That is, the absorbent article is folded at the time of manufacture, a large number of sheets are accumulated, and the absorbent article is stored in a poly bag in a state of being compressed in the accumulation direction and shipped. At this time, since the rising gathers are compressed and stored in the poly bag in a fallen state, the rising gathers do not stand up properly during use, and the rising gathers are in a state of getting inside, which may cause side leakage. ..

In addition, in order to prevent such a situation, in the field of absorbent articles, it is recommended that the user get up and put his finger under the gathers to wake up before using. Even if they did, they sometimes got up and gathered inside when they were attached, and sometimes they got up and gathered inside due to the movement of their legs after they were attached.

However, when the gathers get up and get inside, conventionally, there is no choice but to insert a finger from the side of the absorbent article to pull out the three-dimensional gathers, which is complicated to repair and if there is already excretion, the finger There was a problem that the repair work could not be done without making the dirt dirty.

JP-A-2010-142499 Tomi 3131265 Gazette

Therefore, a main object of the present invention is to provide an absorbent article capable of easily repairing the rising gathers that have entered the inside.

A typical aspect of the present invention that solves the above problems is as follows.
<First aspect>
In absorbent articles with rising gathers that rise from both sides of the surface
The rising gather includes a root portion fixed to an absorbent article, a main body portion extending from the root portion, an inverted portion formed by fixing both ends of the main body portion in the front-rear direction in an inverted state, and the main body. It has a non-fixed raised portion located between the lodging portions in the portion, and a gathered elastic member attached to at least the tip portion of the raised portion along the front-rear direction.
A finger hook or a knob is provided on the outer surface of the rising portion of the rising gather.
Absorbent article characterized by that.

(Action effect)
In this embodiment, since a finger hook or a knob is provided on the outer side surface of the rising portion of the rising gather, when the rising gather gets inside, the finger is hooked on the finger hook exposed to the outside. By picking and pulling the gripped portion, it is possible to get up and pull out the gathers without getting the hands dirty, and the repair work can be easily performed.

<Second aspect>
The finger hook portion or the grip portion has a joint portion joined to a portion of the raised portion that does not have the gather elastic member, and an operation portion that extends from the joint portion and has a finger hooking or finger picking operation portion. Is,
The absorbent article of the first aspect.

(Action effect)
Since the finger rest or the grip part operates the rising part, it needs to be connected to the rising part by the joint, but the rising part is also a part that contracts by the gathered elastic member, so that it is flexible. Is desirable. However, since hardening by the joint cannot be avoided, it is preferable that the joint is provided at a portion having no gathered elastic member as in this embodiment.

<Third aspect>
The finger hook portion is provided on the raised portion, and the finger hook portion is provided.
The finger hook portion has a joint portion for the rising portion provided at intervals in the front-rear direction, and an operation portion that is a portion that connects the joint portions and is not joined to the rising portion. It is a thing
The joint portion is provided at a position overlapping the gather elastic member or a position adjacent to the gather elastic member in the raised portion.
In the deployed state in which the gathered elastic member is extended, the operating portion is in a flat state along the raised portion, and in the state in which the gathered elastic member is contracted, the distance between the joint portions is narrowed, so that the operating portion is Lifts up from the rising part,
The absorbent article of the first or second aspect.

(Action effect)
When such a finger hook portion is provided, the operation portion is lifted during use, and the portion for inserting the finger is greatly opened, so that the finger can be easily inserted into the finger hook portion.

<Fourth aspect>
The raised portion has an outer layer adjacent to the outside of the gathered elastic member and an inner layer adjacent to the inside of the gathered elastic member.
The outer layer and the inner layer are a portion located on the outer side and a portion located on the inner side in a single gather sheet folded back at the tip portion.
The gather sheet has an extension portion continuous from the outer layer or the inner layer to the outside of the outer layer.
The extension portion has a laminated portion that overlaps the outside of the outer layer of the rising portion.
The finger hook portion or the knob portion is formed by the laminated portion.
An absorbent article according to any one of the first to third aspects.

(Action effect)
For the finger hook or the knob, another dedicated member may be attached to the rising gather, but if the rising gather is formed by one gather sheet and the finger hook or the knob is formed by the extension portion thereof, the material cost This is preferable because it can reduce the amount of waste and facilitate the production.

<Fifth aspect>
The laminated portion is a portion formed by folding outward three or more times in the width direction at a position where the gather sheet of the extension portion overlaps with the rising portion.
The laminated portion has an outer laminated portion outside any one of layers having a plurality of layers on both sides in the thickness direction, and an inner laminated portion inside the interlayer.
The operating portion is a non-joined portion of the outer laminated portion that is not joined to the inner laminated portion.
The joint portion is a portion provided on both front and rear sides of the non-joint portion in the outer laminated portion and directly or indirectly joined to the outer layer of the rising portion.
The absorbent article of the fourth aspect.

(Action effect)
In this embodiment, a laminated portion is formed by folding back a gather sheet, and a non-joint portion between the layers is used as a finger insertion portion of a finger hook portion. In particular, the strength of the finger hook portion can be increased by adopting a structure having a plurality of layers on both sides of the non-joined portion in the thickness direction.

<Sixth aspect>
The finger hook portion or the knob portion is provided symmetrically with respect to a virtual straight line passing through the center of the crotch portion in the anteroposterior direction.
An absorbent article according to any one of the first to fifth aspects.

(Action effect)
It is preferable that the finger hook portion or the knob portion is provided symmetrically in the front-rear direction because the rising gather can be operated in a well-balanced manner.

As described above, according to the present invention, there are advantages such as the ability to easily repair the rising gathers that have entered the inside.

It is a top view which shows the inner surface of the pants type disposable diaper in the unfolded state. It is a top view which shows the outer surface of the pants type disposable diaper in the unfolded state. (A) is a 4-4 cross-sectional view of FIG. 1, and (b) is a 5-5 cross-sectional view of FIG. It is a top view which shows the outer surface of the interior body in the unfolded state. It is a cross-sectional view of 2-2 of FIG. It is a cross-sectional view of 3-3 of FIG. It is a perspective view (hole omitted) of a pants type disposable diaper. It is a top view which shows the outer surface of the interior body in the unfolded state together with the outline of the exterior body. It is sectional drawing of the main part which shows the part which has a finger hook part. It is sectional drawing of the main part which shows the side pocket part in the mounted state. 2-2 is a cross-sectional view taken along the line 2-2 of FIG. 1, showing another form. It is sectional drawing of the main part which shows the part which has the finger hook part of another form. 2-2 is a cross-sectional view taken along the line 2-2 of FIG. 1, showing another form. It is sectional drawing of the main part which shows the part which has the finger hook part of another form. It is a top view which shows the outer surface of the pants type disposable diaper in the unfolded state. (A) is a 4-4 cross-sectional view of FIG. 15, and (b) is a 5-5 cross-sectional view of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dotted pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members located on the front side and the back side thereof, and is a solid, bead, curtain, summit or spiral coating of hot melt adhesive, or pattern coating. (Transfer of hot melt adhesive by letterpress method) or the fixed part of the elastic member is formed by coating the elastic member on the outer peripheral surface of the elastic member such as comb gun or sure wrap coating instead of or together with this. is there. Examples of the hot melt adhesive include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation. As a joining means for joining each component, a means by material welding such as a heat seal or an ultrasonic seal can also be used.

1 to 10 show an example of a pants-type disposable diaper. This pants-type disposable diaper includes a front exterior body 12F that constitutes at least the waist circumference of the front body F, a rear exterior body 12B that constitutes at least the waist circumference of the back body B, and a rear exterior body 12F via the crotch portion. It is provided with an interior body 200 provided inside the exterior bodies 12F and 12B so as to extend to the exterior body 12B, and both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to the side. By forming the seal portion 12A, the opening formed by the front and rear ends of the exterior bodies 12F and 12B becomes the waist opening WO through which the wearer's body passes, and the exterior bodies 12F and 12B are formed on both sides of the interior body 200 in the width direction. The portion surrounded by the lower edge and the side edge of the interior body 200 is the leg opening LO through which the leg passes. The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are parts for supporting the interior body 200 with respect to the wearer's body. Further, the reference numeral Y indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the rear body B), and the reference numeral X indicates the diaper in the unfolded state. Shows the full width of.

The pants-type disposable diaper of this embodiment has a waist circumference region T defined as a front-rear direction range (a front-back direction range from the waist opening WO to the upper end of the leg opening LO) having a side seal portion 12A, and a portion forming the leg opening LO. It has an intermediate region L defined as a front-rear direction range (between a front-rear direction region having a side seal portion 12A of the front body F and a front-rear direction region having a side seal portion 12A of the back body B). The waist circumference region 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 portion below the waist portion. Normally, when there is a boundary in the waist circumference region T where the tensile stress in the width direction changes (for example, the thickness and elongation rate of the elastic member change), the waist opening WO side is the waist rather than the boundary on the waist opening WO side. If there is no such boundary, the waist portion W is formed on the waist opening WO side of the absorber 56 or the interior body 200. These lengths in the front-rear direction vary depending on the size of the product and can be appropriately determined. For example, the waist portion W can be 15 to 40 mm and the waist lower portion U can be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are constricted in a U-shape or a curved shape along the circumference of the wearer's leg, and this is a portion for inserting the wearer's leg. As a result, the unfolded pants-type disposable diaper has an hourglass shape as a whole.

(Exterior body)
The exterior bodies 12F and 12B may be integrated exterior bodies 12 that pass through the crotch from the front body F to the back body B as shown in FIGS. 15 and 16, but are shown in FIGS. 1 to 13. In the form, it is composed of a front exterior body 12F which is a part constituting at least a waist circumference portion of the front body F and a rear exterior body 12B which is a portion constituting at least a waist circumference portion of the rear body B, and is composed of the front exterior body 12F and the rear exterior body 12B. The rear exterior body 12B is not continuous on the crotch side and is separated in the front-rear direction LD. The separation distance 12d can be, for example, about 150 to 250 mm.

The exterior bodies 12F and 12B have a waist circumference portion that is a range in the front-rear direction corresponding to the waist circumference region T. Further, in the present embodiment, the rear exterior body 12B has a longer front-rear dimension than the front exterior body 12F, and the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body The body 12B has a buttock cover portion C extending from the waist circumference region T to the intermediate region L side. Although not shown, the front exterior body 12F may also be provided with an inguinal cover portion extending from the waist circumference region T to the intermediate region L side, or the front exterior body 12F and the front exterior body 12F may be provided with an inguinal cover portion but no buttock cover portion. It is not necessary to provide a portion corresponding to the intermediate region L on both of the rear exterior body 12B. Further, in the illustrated embodiment, the lower edge of the buttock cover portion C is formed in a straight line along the WD in the width direction like the lower edge of the front exterior body 12F, but is located on the waist opening side toward the outside in the width direction. It can also be a curve that makes it possible.

The anteroposterior dimension of the side edge of the buttock cover portion C may be appropriately determined, but if it is too long, the corner on the LO side of the leg opening of the side edge may flutter and the appearance and wearing feeling may deteriorate. It is preferable to have it.

As shown in FIG. 3, in the exterior bodies 12F and 12B, the outer sheet layer 12S and the inner sheet layer 12H located on the outer side and the inner side of the elastic members 15 to 18 described later are bonding means such as hot melt adhesive and welding. It is joined by. The sheet material forming the outer sheet layer 12S and the sheet material forming the inner sheet layer 12H may be a common sheet material or may be an individual sheet material. That is, in the former case, in a part or all of the exterior body, the inner sheet layer is formed by the inner part and the outer part of one sheet material folded back at the edge of the waist opening WO (which may be the edge on the crotch side). 12H and the outer sheet layer 12S are formed, respectively. The former form has an advantage that the number of materials of the sheet material is small, and the latter form has an advantage that the positions are less likely to shift when the inner sheet layer 12H and the outer sheet layer 12S are bonded together. The illustrated form corresponds to the latter, and the sheet material forming the inner sheet layer 12H extends only to the edge of the waist opening WO, but the sheet material forming the outer sheet layer 12S is the inner sheet layer 12H. The sheet material is folded around the waist side edge of the sheet material and folded inward, and the folded portion 12r extends so as to cover up to the waist side end portion of the interior body 200.

As the sheet material used for the outer sheet layer 12S and the inner sheet layer 12H, known materials can be used without particular limitation, but a non-woven fabric is preferable. As the non-woven fabric, for example, a non-woven fabric made of olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based, mixed fibers in which two or more of these are used, and composite fibers can be used. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. When a non-woven fabric is used, the basis weight is preferably about 10 to ^{30 g / m 2.}

Further, the total basis weight of the exterior bodies 12F and 12B is preferably about ^{20 to 60 g / m 2.}

(Expandable area / non-expandable area)
Elastic members 15 to 18 are provided between the outer sheet layer 12S and the inner sheet layer 12H in the outer bodies 12F and 12B in order to improve the fit to the waist circumference of the wearer, and the elastic members 15 to 18 are expanded and contracted. An elastic region A2 that elastically expands and contracts in the width direction WD is formed. In this expansion / contraction region A2, in the state of natural length, the outer sheet layer 12S and the inner sheet layer 12H contract with the contraction of the elastic member, and wrinkles or folds are formed, and the elastic members 15 to 18 extend in the longitudinal direction. Then, the outer sheet layer 12S and the inner sheet layer 12H can be stretched to a predetermined stretch rate without wrinkles. As the elastic members 15 to 18, in addition to elongated elastic members such as rubber threads (illustrated examples), known elastic members such as strips, nets, and films can be used without particular limitation. As the elastic members 15 to 18, synthetic rubber or natural rubber may be used.

For bonding the outer sheet layer 12S and the inner sheet layer 12H on the exterior bodies 12F and 12B and fixing the elastic members 15 to 18 sandwiched between them, a hot melt adhesive, a heat seal, or an ultrasonic seal is used by various coating methods. At least one of the fixing means by welding the material such as the above can be used. If the entire surfaces of the exterior bodies 12F and 12B are firmly fixed, the flexibility is impaired. Therefore, it is preferable that the parts other than the adhesive portion of the elastic members 15 to 18 are not adhered or are weakly adhered. In the illustrated embodiment, the hot melt adhesive is applied only to the outer peripheral surfaces of the elongated elastic members 15 to 18 by a coating means such as a comb gun or a sure wrap nozzle, and the hot melt adhesive is sandwiched between the two sheet layers 12S and 12H to obtain the elongated elastic members. A structure that fixes the elongated elastic members 15 to 18 to both sheet layers 12S and 12H and fixes between both sheet layers 12S and 12H only by the hot melt adhesive applied to the outer peripheral surfaces of the members 15 to 18. It has become. The elastic members 15 to 18 can be fixed to the outer sheet layer 12S and the inner sheet layer 12H only at both ends in the expansion / contraction direction in the expansion / contraction region.

More specifically, the elastic members 15 to 18 of the illustrated embodiment will be described in more detail. A plurality of elastic members 15 to 18 are connected between the outer sheet layer 12S and the inner sheet layer 12H in the waist portion W of the exterior bodies 12F and 12B so as to be continuous over the entire width direction WD. Waist elastic members 17 are attached at intervals in the front-rear direction. Further, among the waist elastic members 17, one or a plurality of the waist elastic members 17 arranged in the region adjacent to the lower waist U may overlap with the interior body 200, or may overlap with the interior body 200 in the width direction center. Except for the portion, it may be provided on both sides in the width direction. The waist elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 mm ^{2 in} the case of natural rubber, particularly 0.1 to 1. It ^{is preferable to provide about 3 to 22 rubber threads (about 0 mm 2} ) at intervals of 4 to 12 mm, and the elongation rate of the WD in the width direction of the waist portion W is about 150 to 400%, particularly about 220 to 320%. It is preferable to have it. Further, the waist portion W does not need to use the waist portion elastic member 17 having the same thickness or the same elongation rate for all of the LDs in the front-rear direction. For example, the elastic member 17 is formed at the upper part and the lower portion of the waist portion W. The thickness and the elongation rate may be different.

Further, between the outer sheet layer 12S and the inner sheet layer 12H in the waist lower portion U of the exterior bodies 12F and 12B, a plurality of waist lower elastic members 15 and 18 made of elongated elastic members are spaced apart in the front-rear direction. Is attached.

The elastic members 15 and 18 at the lower part of the waist have a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , especially 0.1 to 0. It is preferable to provide about 5 to 30 rubber threads of 1 to 15 mm ( ^{about 1.0 mm 2} ) at intervals of 3 to 8 mm, and the elongation rate of the WD in the width direction of the lower waist portion U by this is 200 to 350%. In particular, it is preferably about 240 to 300%.

Further, a cover elastic member 16 made of an elongated elastic member is attached between the outer sheet layer 12S and the inner sheet layer 12H in the buttocks cover portion C of the rear exterior body 12B.

The cover elastic member 16 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber, a cross-sectional area of 0.05 to 1.5 ^{mm 2 in} the case of natural rubber, particularly 0.1 to 1.0 mm. ^It is preferable to provide one or a plurality of rubber threads (about 2) at intervals in the front-rear direction, and the elongation rate of the WD in the width direction of the buttock cover portion C is 150 to 300%, particularly 180 to 260%. Is preferable.

When the inguinal cover portion is provided on the front exterior body 12F, the cover portion elastic member can be provided in the same manner.

When the elastic members 15, 16 and 18 are provided in the front-rear direction range having the absorber 56 as in the lower waist portion U and the buttock cover portion C in the illustrated form, the width direction of the absorber 56 in a part or all of them. In order to prevent the contraction of the WD, the middle width direction (preferably including the entire inner / outer joint portions 201 and 202) including a part or all of the portion overlapping the absorber 56 and the WD in the width direction is defined as the non-stretchable region A1. , Both sides in the width direction are defined as the expansion / contraction region A2. The waist portion W is preferably an expansion / contraction region A2 over the entire width direction WD, but a non-expansion / contraction region A1 may be provided in the middle in the width direction as in the waist lower portion U.

In such an elastic region A2 and a non-expandable region A1, elastic members 15 to 17, 18 are supplied between the inner sheet layer 12H and the outer sheet layer 12S, and the elastic members 15, 16 and 18 are stretched regions A2. The elastic members 15, 16 and 18 are intermediate in the width direction in the region that becomes the non-stretchable region A1 and is not fixed in the region that becomes the non-stretchable region A1. It is cut by pressurization and heating at one place, or almost the entire elastic members 15, 16 and 18 are cut into small pieces by pressurization and heating, and the stretchable region A2 is stretched and contracted while the stretchable region A2 is stretched. It can be constructed by killing the sex. In the former case, as shown in FIG. 4, the non-stretchable region A1 is in a state where the elastic members 15, 16 and 18 continuous from the elastic members 15, 16 and 18 of the stretchable region A2 are independently contracted to their natural length as the unnecessary elastic member 19. It remains between the outer sheet layer 12S and the inner sheet layer 12H, and in the latter case, although not shown, the elastic members 15 in the elastic regions A2 and the elastic members 15 in both elastic regions A2 and the remaining cuts continuous from the elastic members 15, 16 and 18 in the elastic regions A2. Cut pieces of elastic members that are not continuous with, 16 and 18 remain between the outer sheet layer 12S and the inner sheet layer 12H in a state of being independently shrunk to the natural length as the unnecessary elastic member 19.

(Cover non-woven fabric)
In the exterior two-piece type pants type disposable diaper, the interior body 200 is exposed between the front exterior body 12F and the rear exterior body 12B, so that the liquid permeable sheet 11 is not exposed on the back surface of the interior body 200. A cover non-woven fabric 13 that covers the back surface of the interior body 200 is provided between the front exterior body 12F and the interior body 200 and between the rear exterior body 12B and the interior body 200. As the cover non-woven fabric 13, an appropriate non-woven fabric such as a non-woven fabric having no holes penetrating the front and back and a perforated non-woven fabric having a large number of holes penetrating the front and back at intervals can be used.

The type of fibers of the cover non-woven fabric 13 and the processing method of fiber bonding (entanglement) are not particularly limited, and the same materials as those of the exterior sheets 12F and 12B can be appropriately selected, but an air-through non-woven fabric can be used. In that case, the basis weight is preferably 20 to 40 g / m ² , and the thickness is preferably 0.3 to 1.0 mm.

The range in the front-rear direction of the cover non-woven fabric 13 is not particularly limited, and as shown in FIGS. 2, 3 and 8, it may extend in the front-rear direction LD over the entire area from the front end to the rear end of the interior body 200. As shown in FIG. 8, it extends in the front-rear direction LD from the front-rear intermediate position of the region where the front exterior body 12F and the interior body 200 overlap to the front-rear direction intermediate position of the region where the rear exterior body 12B and the interior body 200 overlap. You may be. In the case of the form shown in FIG. 8, the length 13y of the laminated portion of the cover nonwoven fabric 13 and the front exterior body 12F in the front-rear direction and the length 13y of the laminated portion of the cover nonwoven fabric 13 and the rear exterior body 12B in the front-rear direction are appropriately determined. However, in the normal case, each can be about 20 to 40 mm.

The width direction range of the cover non-woven fabric 13 is a range in which the exposed portion on the back surface of the liquid impermeable sheet 11 can be hidden. Therefore, in the illustrated embodiment, since the liquid-impermeable sheet 11 is exposed between the base ends of the cover portion described later, from the back side of the base end portion of one cover portion to the back side of the base end portion of the other cover portion. The cover non-woven fabric 13 is provided so as to cover the width direction range of the cover non-woven fabric 13.

(Inner and outer joints)
The back surface of the interior body 200 and the exterior bodies 12F and 12B are joined at the inner and outer joint portions 202 and 203. Fixing at the inner and outer joint portions 202 and 203 can be performed by a joining means by material welding such as heat sealing and ultrasonic sealing, or by a hot melt adhesive.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 6, the interior body 200 includes a top sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbing element 50 interposed between them. Yes, it is the main body that has an absorption function. Reference numeral 40 indicates an intermediate sheet (second sheet) provided between the top sheet 30 and the absorption element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorption element 50. Shows rising gathers 60 extending from both sides of the interior body 200 so as to come into contact with the wearer's body in order to prevent excrement from leaking to both sides of the interior body 200.

(Top sheet)
The top sheet 30 has a property of allowing liquid to permeate, and examples thereof include a perforated or non-perforated non-woven fabric and a porous plastic sheet. Further, among these, the non-woven fabric is not particularly limited as to what the raw material fiber is. For example, olefin-based fibers such as polyethylene and polypropylene, synthetic fibers such as polyester-based and polyamide-based fibers, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers in which two or more of these are used. Etc. can be exemplified. Further, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, if flexibility and drapeability are required, the spunbond method and spunlace method are preferable, and if bulkiness and softness are required, the air through method, point bond method, and thermal bond method are preferable processing methods. ..

Further, the top sheet 30 may be made of one sheet or may be made of a laminated sheet obtained by laminating two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the plane direction.

Both sides of the top sheet 30 may be folded back on the side edge of the absorbing element 50, or may be projected laterally from the side edge of the absorbing element 50 without being folded back.

It is desirable that the top sheet 30 is fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal or a hot melt adhesive for the purpose of preventing misalignment with respect to the back side member. .. In the illustrated form, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.

(Intermediate sheet)
In order to quickly transfer the liquid that has permeated the top sheet 30 to the absorber, an intermediate sheet (also referred to as a "second sheet") 40 having a faster liquid permeation rate than the top sheet 30 can be provided. The intermediate sheet 40 is for quickly transferring the liquid to the absorber, enhancing the absorption performance by the absorber, and preventing the phenomenon of "reversion" of the absorbed liquid from the absorber. The intermediate sheet 40 may be omitted.

Examples of the intermediate sheet 40 include the same materials as the top sheet 30, spunlace, spunbond, SMS, pulp non-woven fabric, mixed sheet of pulp and rayon, point bond or crepe paper. In particular, the air-through non-woven fabric is preferable because it is bulky. It is preferable to use a composite fiber having a core-sheath structure for the air-through non-woven fabric. In this case, the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable. Basis weight is preferably ^{17~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the raw material fiber of the non-woven fabric is preferably 2.0 to 10 dtex. In order to make the non-woven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, and eccentric and hollow fibers as mixed fibers of all or a part of the raw material fibers.

The intermediate sheet 40 of the illustrated form is arranged in the center shorter than the width of the absorber 56, but may be provided over the entire width. The length of the intermediate sheet 40 in the front-rear direction may be the same as the total length of the diaper, may be the same as the length of the absorbing element 50, or may be within a short length range centered on the region for receiving the liquid.

The intermediate sheet 40 may be fixed to a member adjacent to the back side by a joining means by material welding such as a heat seal or an ultrasonic seal or a hot melt adhesive for the purpose of preventing misalignment with respect to the member on the back side. desirable. In the illustrated form, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorber 56 by the hot melt adhesive applied to the back surface thereof.

(Liquid impermeable sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited, but for example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated non-woven fabric in which a plastic film is provided on the surface of the non-woven fabric, or a plastic film. An example is a laminated sheet in which a non-woven fabric or the like is laminated and bonded to the surface. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impermeable and moisture-permeable material that is preferably used from the viewpoint of preventing stuffiness. As a moisture-permeable plastic film, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet and then stretching it in a uniaxial or biaxial direction. Is widely used. In addition to this, methods such as non-woven fabrics using microdenyl fibers, strengthening of leakage resistance by reducing the voids of the fibers by applying heat or pressure, and coating of highly water-absorbent resin or hydrophobic resin or water-repellent agent. Therefore, a liquid-impermeable sheet without using a plastic film can also be used as the liquid-impermeable sheet 11, but it has sufficient adhesive strength when bonded to the cover non-woven fabric 13 described later via a hot-melt adhesive. Therefore, it is desirable to use a resin film.

As shown in the figure, the liquid-impermeable sheet 11 has a width that fits on the back side of the absorbing element 50, and in order to improve leakage resistance, both sides of the absorbing element 50 are wrapped around the side surface of the top sheet 30 of the absorbing element 50. It can also be extended to both sides. The width of the extending portion is appropriately about 5 to 20 mm on each of the left and right sides.

Further, an excretion indicator whose color changes due to absorption of the liquid can be provided on the inside of the liquid impermeable sheet 11, particularly on the side surface of the absorber 56.

(Absorption element)
The absorbing element 50 has an absorbing body 56 and a packaging sheet 58 that encloses the entire absorbing body 56. The packaging sheet 58 may be omitted.

(Absorber)
The absorber 56 can be formed by an aggregate of fibers. The fiber aggregate is obtained by stacking short fibers such as cotton-like pulp and synthetic fibers, and by opening the tow (fiber bundle) of synthetic fibers such as cellulose acetate as necessary. Can also be used. The basis weight of fibers, when fiber stacking flocculent pulp or short fibers, for example, be a 100 to 300 g / m ² approximately, in the case of a filament aggregate, for example, be 30 to 120 g / m ² approximately Can be done. In the case of synthetic fibers, the fineness is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The degree of crimping of the crimped fibers can be, for example, 5 to 75 fibers per 2.54 cm , preferably 10 to 50 fibers, and more preferably about 15 to 50 fibers. Further, in many cases, uniformly crimped crimped fibers are used. It is preferable to disperse and hold the highly absorbent polymer particles in the absorber 56.

The absorber 56 may have a rectangular shape, but as shown in FIGS. 1 and 7, it is preferable that the absorber 56 has an hourglass shape having a constricted portion 56N narrower than both front and rear sides in the middle in the front-rear direction.

The size of the absorber 56 can be appropriately determined as long as it extends from the front, back, left and right of the urination port position, but it is preferable that the size of the absorber 56 extends to the peripheral edge of the interior body 200 or its vicinity in the front-rear direction LD and the width direction WD. .. Reference numeral 56X indicates the entire width of the absorber 56.

(Highly absorbent polymer particles)
The absorber 56 may contain highly absorbent polymer particles in part or all of it. The highly absorbent polymer particles include "powder" in addition to "particles". As the highly absorbent polymer particles 54, those used for this kind of disposable diaper can be used as they are, for example, sieving with a standard sieve (JIS Z8801-1: 2006) of 500 μm (shaking for 5 minutes). It is desirable that the proportion of particles remaining on the sieve is 30% by weight or less, and the proportion of particles remaining on the sieve is determined by sieving (shaking for 5 minutes) using a standard sieve of 180 μm (JIS Z8801-1: 2006). 60% by weight or more is desirable.

The material of the highly absorbent polymer particles can be used without particular limitation, but those having a water absorption of 40 g / g or more are preferable. Highly absorbent polymer particles include starch-based, cellulosic-based and synthetic polymer-based ones, which are starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked sodium carboxymethyl cellulose. A substance or an acrylic acid (salt) polymer or the like can be used. As the shape of the highly absorbent polymer particles, a commonly used powder or granular material is preferable, but other shapes can also be used.

As the highly absorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption rate is too slow, so-called reversion, in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56, is likely to occur.

Further, as the highly absorbent polymer particles, those having a gel strength of 1000 Pa or more are preferably used. As a result, even when the bulky absorber 56 is used, the sticky feeling after liquid absorption can be effectively suppressed.

The basis weight of the highly absorbent polymer particles can be appropriately determined according to the amount of absorption required for the application of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the basis weight of the polymer ^{is less than 50 g / m 2} , it becomes difficult to secure the absorption amount. Above 350 g / m ² , the effect saturates.

If necessary, the highly absorbent polymer particles can be adjusted in spray density or spray amount in the plane direction of the absorber 56. For example, the amount of liquid excreted at the site can be increased as compared with other sites. When considering the difference between men and women, the spray density (amount) on the front side can be increased for men, and the spray density (amount) on the central part can be increased for women. Further, it is also possible to provide a portion where the polymer does not exist locally (for example, in a spot shape) in the plane direction of the absorber 56.

(Packaging sheet)
When the packaging sheet 58 is used, as the material thereof, tissue paper, particularly crepe paper, non-woven fabric, non-woven fabric of polylami, a sheet having small holes, or the like can be used. However, it is desirable that the sheet does not allow the highly absorbent polymer particles to escape. When a non-woven fabric is used instead of the crepe paper, a hydrophilic SMS non-woven fabric (SMS, SMSMS, etc.) is particularly suitable, and polypropylene, polyethylene / polypropylene composite material, or the like can be used as the material. The basis weight is preferably 5 to 40 g / m ² , especially 10 to 30 g / m ² .

The packaging form of the packaging sheet 58 can be appropriately determined, but from the viewpoint of ease of manufacture and prevention of leakage of highly absorbent polymer particles from the front and rear edge edges, a cylinder is provided so as to surround the front and back surfaces and both side surfaces of the absorber 56. It is preferable that the parts are wound in a shape, the front and rear edges thereof are projected from the front and rear of the absorber 56, and the overlapped portion and the laminated portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(Get up gather)
The rising gather 60 is provided to prevent so-called lateral leakage, and is generally called a three-dimensional gather. As shown in FIGS. 1, 4, 5, and 9, the rising gather 60 extends along both sides of the top sheet 30 over the entire anteroposterior LD, and the top is in contact with the wearer's body surface. It rises from both sides of the seat 30. In the side gather 60 of the illustrated example, the root side portion 60B stands up diagonally toward the center side of the WD in the width direction, and the tip side portion 60A stands up diagonally toward the outside of the WD in the width direction. It is possible to make appropriate changes such as making it a known form that stands on the center side of the direction WD.

More specifically, the rising gather 60 folds the strip-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction WD at the tip portion and folds it in two. A plurality of elongated gather elastic members 63 are fixed between the folded portion and the sheets in the vicinity thereof in an elongated state along the longitudinal direction at intervals in the width direction WD. The base end portion (the end portion opposite to the seat folded portion in the width direction WD) of the rising gather 60 located on the opposite side to the tip portion is fixed to the side portion on the back side of the liquid permeable sheet 11 in the interior body 200. The root portion 65 is formed, and the portion other than the root portion 65 is a main body portion 66 (a portion on the folded-back portion side) extending from the root portion 65. Further, the main body portion 66 has a root side portion 60B extending toward the center in the width direction and a tip side portion 60A folded back at the tip of the root side portion 60B and extending outward in the width direction. This form is a surface contact type rising gather 60, but a line contact type rising gather 60 that is not folded outward in the width direction can also be adopted. The front-rear direction intermediate portion of the main body portion 66 is fixed to the side surface of the top sheet 30 in the front-rear direction, while the front-rear direction intermediate portion located between them is not fixed. A gathered elastic member 63 along the front-rear direction LD is fixed to at least the tip of the raised portion 68 in an extended state. The gather elastic member 63 is not fixed to the gather sheet 62 at the front and rear ends of the rising gather 60, but at least at the tip, it is at the same position as the crotch side edge of the prone portion 67 or closer to the waist. It is preferable that the position is fixed to the position of, because the rise is stable.

In the rising gather 60 configured as described above, the contraction force of the elongated elastic member 63 acts to bring both ends in the front-rear direction closer to each other, but both ends in the front-rear direction of the main body 66 are fixed so as not to stand up. On the other hand, since there is a non-fixed rising portion 68 between them, only the rising portion 68 stands up so as to abut on the body side as shown in FIG. In particular, when the root portion 65 is located on the back side of the interior body 200, the rising portion 68 stands up so as to open outward in the width direction in the crotch portion and its vicinity, so that the rising gather 60 comes into contact with the legs. And the fit will be improved.

Like this rising gather 60, in a bent form in which the main body portion 66 is composed of a root side portion 60B extending toward the center in the width direction and a tip side portion 60A folded back at the tip of the root side portion 60B and extending outward in the width direction. In the inverted portion 67, the tip side portion 60A and the root side portion 60B are joined in an inverted state, and the root side portion 60B is joined to the top sheet 30 in an inverted state. At least one of hot melt adhesives by various coating methods and material welding means such as heat sealing and ultrasonic sealing can be used for joining the facing surfaces in the inverted portion 67. In this case, the joining of the root side portion 60B and the top sheet 30 and the joining of the tip side portion 60A and the root side portion 60B may be performed by the same means or by different means. For example, it is one preferable form that the root side portion 60B and the top sheet 30 are joined by a hot melt adhesive, and the tip side portion 60A and the root side portion 60B are joined by material welding.

As the gather sheet 62, a flexible, uniform and concealing non-woven fabric such as a spunbonded non-woven fabric (SS, SSS, etc.), an SMS non-woven fabric (SMS, SMSMS, etc.), a melt-blown non-woven fabric, etc., is water-repellent with silicone or the like, if necessary. The treated material can be preferably used, and the fiber texture is preferably about 10 to ^{30 g / m 2.} As the gather elastic member 63, an elongated elastic member such as rubber thread can be used. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, more preferably 620 to 940 dtex. The elongation rate at the time of fixing is preferably 150 to 350%, more preferably 200 to 300%. Further, as shown in the drawing, the waterproof film 64 can be interposed between the gathered sheets 62 folded in two. In this case, the gathered sheet 62 is partially omitted in the existing portion of the waterproof film 64. However, in order to make the appearance and feel of the product like a cloth, it is necessary that at least the outer surface from the base end to the tip of the rising gather 60 is formed of the gather sheet 62 as shown in the illustrated figure. is there. The waterproof film 64 may be provided exclusively for the rising gather 60, but as in the examples shown in FIGS. 12 and 13, the liquid-impermeable sheet 11 covering the back side of the absorber 56 is raised and laterally extended to the inside of the gather 60. It may be formed by extending to.

The number of elongated elastic members 63 provided in the rising portion 68 of the rising gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is preferably 3 to 10 mm. With this configuration, it becomes easier for the elongated elastic member 63 to come into contact with the skin in the area where the elongated elastic member 63 is arranged. In particular, as shown in the illustrated example, it is preferably provided on the tip side portion 60A, the side portion of the root side portion 60B (the portion that wraps around the side of the absorber), and the root portion 65.

In the rising portion 68 of the rising gather 60, a hot melt adhesive, a heat seal, and ultrasonic waves are used for bonding the inner layer and the outer layer of the gather sheet 62 and fixing the gather elastic member 63 sandwiched between them by various coating methods. At least one of the fixing means by welding the material such as a seal can be used. If the entire inner and outer layers of the gather sheet 62 are bonded together, the flexibility is impaired. Therefore, it is preferable that the parts other than the adhesive portion of the gather elastic member 63 are not adhered or are weakly adhered. In the illustrated embodiment, the gather elastic member 63 is sandwiched between the inner layer and the outer layer of the gather sheet 62 by applying a hot melt adhesive only to the outer peripheral surface of the gather elastic member 63 by a coating means such as a comb gun or a sure wrap nozzle. The structure is such that the elongated elastic member is fixed to the inner layer and the outer layer of the gather sheet 62 and the inner layer and the outer layer of the gather sheet 62 are fixed only by the hot melt adhesive applied to the outer peripheral surface of the gather sheet 62. There is.

Similarly, for fixing the waterproof film 64 incorporated in the rising gather 60 and the gather sheet 62, and fixing the inverted portion 67, hot melt adhesives are used by various coating methods, and materials such as heat seals and ultrasonic seals are welded. At least one of the means by means can be used.

The dimensions of the rising gather 60 can be appropriately determined, but in the case of infant use, for example, as shown in FIG. 3, the rising height of the rising gather 60 (the length in the width direction of the main body portion 66 in the deployed state) W2 is 15. It is preferably ~ 60 mm, particularly 20-40 mm. Further, the separation distance W1 between the innermost folds when the rising gather 60 is folded flat so as to be parallel to the surface of the top sheet 30 is preferably 60 to 190 mm, particularly 70 to 140 mm. For adult use, the rising height of the rising gather 60 (the length in the width direction of the main body portion 66 in the unfolded state) W2 is preferably 20 to 60 mm, particularly preferably 30 to 55 mm. Further, the separation distance W1 between the innermost folds when the rising gather 60 is folded flat so as to be parallel to the surface of the top sheet 30 is preferably 110 to 190 mm, particularly 120 to 150 mm.

(Finger hook)
Characteristically, as shown in FIGS. 4 to 6 and 9, a finger hook portion 70 is provided on the outer surface of the rising portion 68 in the rising gather 60. When the rising gather 60 gets inside, by hooking a finger on the finger hook 70 exposed to the outside and pulling it, the rising gather 60 can be pulled out without getting the hands dirty, and the repair work can be easily performed. be able to. The finger hook 70 is a band-shaped or string-shaped portion through which a finger can pass, even if it is a pocket-shaped portion for inserting a finger as in the examples shown in FIGS. 3 to 5 and 9. It may be a part. The finger hook 70 can also be operated by pinching it with a finger. Instead of the finger hook portion 70, a knob portion having no portion on which the finger is hooked may be provided (not shown).

Since the finger hook portion 70 operates the rising portion 68, it needs to be joined to the rising portion 68, but since the rising portion 68 is also a portion contracted by the gather elastic member 63, it is desirable that the finger hook portion 70 is flexible. .. Therefore, as shown in the illustrated example, the finger hook portion 70 has a joint portion 71 joined to a portion of the raised portion 68 that does not have the gather elastic member 63, and an operation portion 72 for hanging a finger extending from the joint portion 71. It is preferable to have. As a result, the flexibility of the raised portion 68 and the elasticity of the gathered elastic member 63 are less likely to be impaired.

It is preferable that a large number of gathered elastic members 63 are provided on the raised portion 68 at intervals from the tip portion to the base end side, and in particular, as shown in the illustrated example, the side portions (absorption) of the tip portion side portion 60A and the root side portion 60B. Considering that it is preferable to provide the gathered elastic member 63 in the portion that wraps around the side of the body 56) and the root portion 65, and that the gather elastic member 63 is a member that extends in the front-rear direction LD, the joint portion 71 of the finger hook portion 70 is these. It is preferable to provide it only between the gathered elastic members 6313. In particular, in the case of the illustrated example, the joint portion 71 of the laminated portion is between the gather elastic member 63 on the most root side in the tip end side portion 60A and the gather elastic member 63 located on the side portion of the root side portion 60B. It is preferable to provide only in.

Further, the finger hook portion 70 is a portion that connects the joint portion 71 to the raised portion 68 provided at intervals in the front-rear direction LD and the joint portion 71, and is not joined to the raised portion 68. In the case of the form having the operation portion 72, the joint portion 71 of the finger hook portion 70 is provided at a position adjacent to the gather elastic member 63 in the raised portion 68, and the operation is performed in the expanded state where the gather elastic member 63 is extended. The portion 72 is in a flat state along the rising portion 68, and when the gather elastic member 63 is contracted, the interval between the joint portions 71 is narrowed so that the operating portion 72 is lifted from the rising portion 68. Is preferable. When such a finger hook portion 70 is provided, the manufacturing becomes easy, and the operation portion 72 rises during use, and the portion for inserting the finger is greatly opened, so that the finger can be easily inserted into the finger hook portion 70. Even if the joint portion 71 of the finger hook portion 70 is provided at a position where it overlaps with the gather elastic member 63, the same effect is obtained, but as described above, the flexibility of the rising portion 68 and the elasticity of the gather elastic member 63 are reduced. ..

As shown in FIGS. 12 and 13, the finger hook portion 70 can be formed by attaching another dedicated member to the rising gather 60, but the rising gather 60 is formed by one gather sheet 62 and the raised gather portion 70 is formed thereof. It is preferable to form the finger hook portion 70 or the knob portion by the extension portion 69 because the material cost can be reduced and the production can be facilitated. More specifically, in the examples shown in FIGS. 4 to 6 and 9, and in the examples shown in FIGS. 10 and 11, the rising portion 68 of the rising gather 60 is gathered with the outer layer 62x adjacent to the outside of the gather elastic member 63. It has an inner layer 62i adjacent to the inner side of the elastic member 63, and the outer layer 62x and the inner layer 62i are located on the outer side and the inner side of one gather sheet 62 folded at the tip portion. The gathered sheet 62 forms an extension portion 69 continuous from the outer layer 62x (or the inner layer 62i) to the outside of the outer layer 62x. The extension portion 69 has a laminated portion 80 that overlaps the outer side of the outer layer 62x of the raised portion 68, and the finger hook portion 70 is formed by the laminated portion 80.

The extension portion 69 may be formed only in a part of the front-rear direction LD of the gather sheet 62, but in order not to generate waste material (trim) due to cutting, the extension portion 69 covers the entire front-rear direction of the gather sheet 62 as shown in the illustrated example. It is preferable to form.

When the finger hook portion 70 is formed by the laminated portion 80 in the extension portion 69 of the gather sheet 62, the structure thereof is not particularly limited, but in the examples shown in FIGS. 4 to 6 and 9, the gather sheet 62 rises and gathers. An outer layer 62x extending from the tip of the 60 to the root portion 65 is formed, and an extension portion 69 is formed which is folded outward at the root portion 65 of the outer layer 62x and extends to the rising portion 68. The extension portion 69 has a laminated portion 80 formed by being folded outward three times in the width direction WD at a position overlapping the rising portion 68. The laminated portion 80 has an outer laminated portion 81 outside any one of layers having a plurality of layers on both sides in the thickness direction, and an inner laminated portion 82 inside the interlayer, and the outer laminated portion 81. The non-joint portion 81n not joined to the inner laminated portion 82 becomes the operation portion 72 of the finger hook portion 70, and the outer layer 62x of the rising portion 68 provided on both front and rear sides of the non-joint portion 81n in the outer laminated portion 81. On the other hand, the portion directly or indirectly joined is the joint portion 71 of the finger hook portion 70.

Further, in the examples shown in FIGS. 10 and 11, the gather sheet 62 forms an outer layer 62x extending from the tip of the rising gather 60 to the root portion 65, and is folded out to the outside of the outer layer 62x at the rising portion 68 in the middle. It has a formed portion, and an extension portion 69 is formed by this folded-out portion. The extension portion 69 has a laminated portion 80 formed by being folded outward four times in the width direction WD at a position overlapping the rising portion 68. The laminated portion 80 has an outer laminated portion 81 outside any one of layers having a plurality of layers on both sides in the thickness direction, and an inner laminated portion 82 inside the interlayer, and the outer laminated portion 81. The non-joint portion 81n not joined to the inner laminated portion 82 becomes the operation portion 72 of the finger hook portion 70, and the outer layer 62x of the rising portion 68 provided on both front and rear sides of the non-joint portion 81n in the outer laminated portion 81. On the other hand, the portion directly or indirectly joined is the joint portion 71 of the finger hook portion 70.

In these examples, since a plurality of layers of the gather sheet 62 are provided on both sides of the non-joint portion 81n in the thickness direction, the strength of the finger hook portion 70 is high. In these examples, the number of turns is 3 or 4, but it can be more than that. Of course, when the material strength of the gather sheet 62 is high, the number of folds can be set to once or twice as needed.

In the examples shown in FIGS. 4 to 6 and 9, and in the examples shown in FIGS. 10 and 11, the finger hook portion 70 has a form of opening toward the tip end side of the raised portion 68, but as shown in FIGS. 12 and 13. It may be in the form of opening to the root portion 65 side as well. In the former form, the thigh may be an obstacle when the finger is put into the finger hook portion 70, but in the latter form, such a possibility is lessened. Further, although not shown, the finger hook portion 70 may be opened only on the root portion 65 side.

In addition to providing one finger hook portion 70 on each rising gather 60 as shown in FIG. 4, a plurality of finger hooking portions 70 may be provided on each rising gather 60 at intervals in the front-rear direction as shown in FIG. The position of the finger hook portion 70 can be appropriately determined, and it is desirable that the finger hook portion 70 is provided at least in the crotch portion. Further, it is preferable that the finger hook portion 70 is provided symmetrically with respect to the virtual straight line passing through the center of the LD in the front-rear direction of the crotch portion because the rising gather 60 can be operated in a well-balanced manner, but it can also be arranged asymmetrically.

The dimensions of the finger hook portion 70 (non-joint portion 81n) can be appropriately determined, but usually, the dimension of the LD in the front-rear direction is preferably about 30 to 60 mm, and the dimension of the WD in the width direction is about 15 to 30 mm. It is preferable to have. When a plurality of finger hooks 70 are provided at intervals in the front-rear direction LD, the distance between adjacent finger hooks 70 can be appropriately determined, but usually, it is preferably about 20 to 50 mm.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

-The "front-back direction (vertical direction)" means the direction connecting the ventral side (front side) and the dorsal side (rear side), and the "width direction" means the direction orthogonal to the front-back direction (horizontal direction).

・ "Front side" means the person closer to the wearer's skin when wearing a pants-type disposable diaper, and "back side" means the person farther from the wearer's skin when wearing a pants-type disposable diaper. ..

-"Elongation rate" means a value when the natural length is 100%.

-"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and ion-exchanged water: 97.09 wt% To 49.0 g of the mixture), 1.0 g of a highly absorbent polymer is added, and the mixture is stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500 manufactured by I. techno Engineering).

・ "Metsuke" is measured as follows. After pre-drying the sample or test piece, leave it in a test room or device under standard conditions (test location: temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to bring it to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. It is not necessary to pre-dry the fibers having an official moisture content of 0.0%. A sample having a size of 100 mm × 100 mm is cut out from the test piece in a constant weight state using a sampling template (100 mm × 100 mm). The weight of the sample was measured, 10 0 times to calculate the weight per square meter, a basis weight.

-"Thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm ² and pressurized area: 2 cm ^2.

-The amount of water absorption is measured by JIS K7223-1996 "Method for testing the amount of water absorption of a highly water-absorbent resin".

-The water absorption rate shall be the "time to the end point" when JIS K7224-1996 "Water absorption rate test method for highly water-absorbent resin" was performed using 2 g of highly absorbent polymer and 50 g of physiological saline. ..

-"Unfolded state" means a state in which the unfolded state is flat without shrinkage or slack.

-Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

-If there is no description about the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or equipment under standard conditions (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). To do.

The present invention is suitable for pants-type disposable diapers as in the above example, but can be applied to all absorbent articles such as sanitary napkins as well as tape-type or pad-type disposable diapers.

11 ... Liquid permeable sheet, 12B ... Rear exterior body, 12F ... Front exterior body, 12H ... Inner sheet layer, 12S ... Outer sheet layer, 13 ... Cover non-woven fabric, 17 ... Waist elastic member, 19 ... Unnecessary elastic member, 200 ... Interior body, 201, 202 ... Inner / outer joint, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbent element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Rise gather, 62 ... Gather sheet, 62i ... Inner layer, 62x ... outer layer, 63 ... gathered elastic member, 65 ... root part, 66 ... protruding part, 67 ... lodging part, 68 ... rising part, 69 ... extension part, 70 ... finger hook part, 71 ... joint part, 72 ... Operation part, 80 ... Laminated part, 81 ... Outer laminated part, 81n ... Non-joined part, 82 ... Inner laminated part, A1 ... Non-stretchable region, A2 ... Stretchable region, L ... Intermediate region, LD ... Front-back direction, T ... Waist circumference area, U ... lower waist, W ... waist, WD ... width direction, WO ... waist opening.

Claims (4)

In absorbent articles with rising gathers that rise from both sides of the surface
The rising gather includes a root portion fixed to an absorbent article, a main body portion extending from the root portion, an inverted portion formed by fixing both ends of the main body portion in the front-rear direction in an inverted state, and the main body. It has a non-fixed raised portion located between the lodging portions in the portion, and a gathered elastic member attached to at least the tip portion of the raised portion along the front-rear direction.
The rising on an outer surface of a portion rising in gather, finger holder is provided,
The raised portion has an outer layer adjacent to the outside of the gathered elastic member and an inner layer adjacent to the inside of the gathered elastic member.
The outer layer and the inner layer are a portion located on the outer side and a portion located on the inner side in a single gather sheet folded back at the tip portion.
The gather sheet has an extension portion continuous from the outer layer or the inner layer to the outside of the outer layer.
The extension portion has a laminated portion that overlaps the outside of the outer layer of the rising portion.
The laminated portion is a portion formed by folding outward three or more times in the width direction at a position where the gather sheet of the extension portion overlaps with the rising portion.
The laminated portion has an outer laminated portion outside any one of layers having a plurality of layers on both sides in the thickness direction, and an inner laminated portion inside the interlayer.
The outer laminated portion was directly or indirectly joined to the non-joined portion not joined to the inner laminated portion and the outer layer of the raised portion provided on both front and rear sides of the non-joined portion. Has a joint and
The finger hook portion is composed of the joint portion and an operation portion composed of the non-joint portion.
Absorbent article characterized by that. The junction Ru Oh at the gather elastic member portion joined to the portion having no in the rising portion,
The absorbent article according to claim 1. The joint portion is provided at a position overlapping the gather elastic member or a position adjacent to the gather elastic member in the raised portion.
In the deployed state in which the gathered elastic member is extended, the operating portion is in a flat state along the raised portion, and in the state in which the gathered elastic member is contracted, the distance between the joint portions is narrowed, so that the operating portion is Lifts up from the rising part,
The absorbent article according to claim 1. The finger hook portion is provided symmetrically with respect to a virtual straight line passing through the center of the crotch portion in the anteroposterior direction.
The absorbent article according to any one of claims 1 to 3.

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