JP6039956B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article.

Conventionally, in a pants-type disposable diaper, a waistline elastic member disposed on the waistline is fixed to a member other than the outermost layer sheet that forms the outer surface of the diaper, and the non-between the waistline elastic member and the outermost layer sheet A technique is known in which gathers are formed on the inner side of the outermost layer sheet by providing a joining region, while gathers are not formed on the outer surface of the waistline portion (Patent Document 1).
Patent Documents 2 and 3 also describe an absorbent article having a non-joined region in which both sheets are not joined between the outermost layer sheet and the inner layer sheet disposed on the skin side thereof.
Patent Document 4 describes a disposable diaper in which a waist elastic elastic member is arranged on a waist part of a pants-type disposable diaper and a waist elastic elastic member is arranged on a portion overlapping with an absorber.

JP 11-4853 A Japanese Patent Application Laid-Open No. 2004-305782 JP 2007-151597 A JP 2008-525104 A

Since the gathers of the diaper of patent document 1 are not formed in the outer surface of a waist part, it exhibits a clean external appearance.
However, the sheet in which the elastic member forming the gathers is fixed to the inner side of the outermost layer sheet reaches the vicinity of the opening edge of the waist opening, and the sheet disposed further on the inner surface side of the sheet. Since the elastic member is fixed between the sheets, there is room for improvement from the viewpoint of flexibility of the diaper.

  Patent Documents 2 and 3 describe a technique in which an elastic member and a sheet are fixed with an adhesive, and an area where the sheets sandwiching the elastic member are not joined is formed between the elastic members. . However, in the technique of Patent Document 2, since the sheet is fixed only by the hot melt adhesive applied to the elastic member, for example, when the pants-type diaper is pulled up and worn, the sheets are used. There is a risk of structural breakage due to separation. Further, the article of Patent Document 2 has a narrow portion extending from the absorbent body or the absorbent main body toward the opening edge of the waist opening portion, and is inferior in flexibility such as a waistline portion.

Moreover, in patent document 4, between the outermost layer sheet and the sheet arranged on the inner side, the part joined with a spot-like hot-melt adhesive and the hot-melt adhesive coated on the entire surface were joined. An absorbent article is disclosed in which an elastic member for gathering is fixed to a portion provided with a portion and joined with a spot-like hot melt adhesive.
However, since there is no unjoined part between the outermost layer sheet and the sheet disposed on the inner side of the outermost layer sheet to cause a floating portion, the outer surface of the diaper is inferior in flexibility.

  Therefore, the problem of the present invention is that the wearer's skin is excellent in fit, and the inner and outer surfaces of the pant-type absorbent article are both soft and comfortable, and the structure of the absorbent article when worn An object of the present invention is to provide a pant-type absorbent article that is not easily broken.

The present invention comprises an exterior body and an absorbent main body fixed to the skin surface side of the exterior body, and has a longitudinal direction extending from the abdominal side part to the back side part via the crotch part and a width direction intersecting therewith. A pants-type absorbent article having an outer layer sheet, an inner layer sheet positioned on the skin surface side of the outer layer sheet, and the absorbent main body positioned on the skin surface side of the inner layer sheet An auxiliary sheet extending over the upper and lower ends of the longitudinal direction, and a waistline region in which the outer layer sheet, the inner layer sheet and the auxiliary sheet overlap is divided into four equal parts in the longitudinal direction. The inner elastic member is at least between the inner layer sheet and the auxiliary sheet in the middle region when divided into a top region consisting of the top one region, a middle region consisting of the central two regions, and a bottom region consisting of the bottom one region. Arranged along the width direction, The auxiliary sheet in serial respectively upper region and a lower end region, the junction area ratio between the inner layer sheet or the absorbent body is higher than the bonding area ratio in the in area, the said outer sheet inner sheet and during the, has a non-bonding region in a region which overlaps with formation regions of the inner elastic member in the in the region, said auxiliary sheet, the crotch from the longitudinal end portion of the lower end thereof before Symbol absorbent body located within the section direction following 5mm than on 8 0 mm, and the longitudinal direction on 5mm or more 5 0 mm below over the length being joined to the absorbent body, a pant-type absorbent article It is to provide.

  The pant-type absorbent article of the present invention is excellent in fit to the wearer's skin, and both the inner and outer surfaces of the pant-type absorbent article are soft and comfortable to the touch. The structural destruction of is difficult to occur.

FIG. 1 is a perspective view showing a pants-type disposable diaper which is an embodiment of a pants-type absorbent article of the present invention. FIG. 2 is a developed plan view showing the inner surface side in the developed and extended state of the diaper shown in FIG. The expanded and expanded state means that the pants-type absorbent article is in the expanded state, and the expanded absorbent article is stretched with the elastic members of each part, and the design dimensions (in a state in which the influence of the elastic members is completely eliminated) It is the same as when it is expanded to the same size). 3 is a cross-sectional view taken along the line II of FIG. 4 is a cross-sectional view taken along line II-II in FIG. FIG. 5 is a cross-sectional view showing an example of an inter-sheet fixing mode of an elastic member for keeping the bonding area ratio low. FIG. 6 is a schematic diagram showing a modification of the present invention.

Below, this invention is demonstrated, referring drawings based on the preferable embodiment.
A pants-type disposable diaper 1 (hereinafter also referred to as diaper 1) according to an embodiment of the present invention includes an exterior body 11 and an absorbent main body fixed to the skin surface side of the exterior body 11 as shown in FIG. 10.
The diaper 1 includes an abdominal side A disposed on the stomach side of the wearer when worn, a back side B disposed on the back side of the wearer when worn, and between the abdominal side A and the back side B. It has a crotch part C which is located and is arranged on a wearer's crotch part at the time of wear.
The longitudinal direction of the diaper (pants-type absorbent article) is a direction extending from the abdominal side A to the back side B through the crotch C, and is the Y direction in FIG. Moreover, the width direction of a diaper (underpants type absorbent article) is a direction crossing the longitudinal direction, and is the X direction in FIG. In the unfolded and extended diaper 1, the width direction X of the diaper 1 is orthogonal to the longitudinal direction Y. The longitudinal direction and the width direction of the absorbent main body are directions corresponding to the longitudinal direction and the width direction of the pant-type absorbent article, respectively. Moreover, in each of the abdominal side A and the back side B, the vertical direction of the pants-type absorbent article is the vertical direction when worn, so the waist opening in the vertical direction of the abdominal side A and the back side B The edge W side is also referred to as the upper side, and the crotch C side is also referred to as the lower side.

The exterior body 11 has the outer layer sheet | seat 12, the inner layer sheet | seat 13, and the auxiliary sheet | seat 15, as shown in FIGS. Furthermore, it has the folding | returning parts 12a and 12b of the outer layer sheet | seat 12 formed by the sheet | seat material which comprises the outer layer sheet | seat 12 being folded | folded by the skin surface side in the waist opening edge W. The outer layer sheet 12 and the inner layer sheet 13 are continuous over the abdominal side A, the crotch C, and the back side B, respectively, and the auxiliary sheet 15 is provided on each of the back side B and the abdominal side A. It is arranged.
The outer layer sheet 12 forms the outer surface of the diaper 1, and the inner layer sheet 13 is disposed adjacent to the outer layer sheet 12 on the skin surface side of the outer layer sheet 12. The auxiliary sheet 15 is located on the skin surface side of the inner layer sheet 13 and extends over the vertical ends of the absorbent main body 10. The skin surface is a surface that is directed to the wearer's skin side when the pant-type absorbent article is worn, of both surfaces of each sheet.

  As shown in FIG. 1, the exterior body 11 has both side edge portions on the ventral side portion A and both side edge portions on the back side portion B joined to each other. Portions S and S, a waist opening 5 and a pair of leg openings 6 and 6 are formed. The waist opening edge W is the periphery of the waist opening 5. In the unfolded and extended diaper 1, the exterior body 11 has an hourglass shape in which the central portion in the vertical direction is constricted as shown in FIG. 2.

As shown in FIGS. 2 to 4, the abdominal side A and the back side B of the diaper 1 have waistline regions A <b> 2 and B <b> 2 where the outer layer sheet 12, the inner layer sheet 13 and the auxiliary sheet 15 overlap, respectively. Yes. Waist regions A1 and B1 along the waist opening edge W and crotch region A3 and B3B3 are provided above and below the waistline regions A2 and B2 in the abdominal side A and the back side B, respectively.
Hereinafter, the lamination | stacking state of the sheet | seat in the exterior body 11 of the diaper 1 is further demonstrated. 3 and 4 show the abdomen side A side of the diaper, the diaper 1 of the present embodiment has the same structure on the back side B side. Therefore, hereinafter, the configurations of the abdominal part A and the dorsal part B will be described with reference to FIGS. 3 and 4.

In the diaper 1 of the present embodiment, the waistline regions A2 and B2 of the abdominal side A and the back side B, respectively, in the longitudinal direction of the abdominal side A or the back side B, as shown in FIG. This is a region between the position of the upper end 13u and the position of the lower end 15d of the auxiliary sheet 15. The auxiliary sheet 15 has a lower end 15d located in the range of 5 mm or more and 80 mm or less, preferably 5 mm or more and 50 mm or less from the longitudinal end 10a of the absorbent main body 10 to the crotch direction. For example, it is located within a range of 5 to 80 mm, preferably 5 to 50 mm. That is, the auxiliary sheet 15 has a length L3 (see FIG. 3) in the longitudinal direction Y of the portion overlapping the absorbent main body 10 within this numerical range. The separation distance between the position of the lower end 15d of the auxiliary sheet 15 and the position closest to the crotch portion in the region where the auxiliary sheet 15 and the absorbent main body 10 are joined is preferably 0 mm or more, and preferably 30 mm. Hereinafter, it is more preferably 20 mm or less, for example, preferably 0 to 30 mm, more preferably 0 to 20 mm, the non-bonded region of the auxiliary sheet 15 rises at the time of attachment and detachment and inhibits wearing feeling. It is preferable from the viewpoint of preventing. In the present embodiment, the crotch C side edge of the auxiliary sheet 15 is not bonded to the absorbent main body 10.
And as shown in FIG.3 and FIG.4, the waist area A2, B2 in the abdominal part A or the dorsal part B is divided into 4 equally in the vertical direction, the upper end area | region D which consists of 1 upper end area | regions, and 2 center area | regions When it divides into the lower end area | region F which consists of the middle area | region E and lower end 1 area | region, the stomach side part A and the back side part B in the diaper 1 of this embodiment have the following structures.

  That is, the inner elastic member 71 is arranged along the width direction X between the inner layer sheet 13 and the auxiliary sheet 15 at least in the middle region E. In other words, it is preferable that the inner elastic member 71 is disposed along the width direction X between the inner layer sheet 13 and the auxiliary sheet 15, and the inner elastic member 71 is disposed at least in the middle region E. As shown in FIGS. 3 and 4, it is preferable that a plurality of inner elastic members 71 are arranged in the middle region E at intervals in the Y direction.

  In the example shown in FIGS. 3 and 4, three inner elastic members 71 are arranged in the middle region E, and one inner elastic member 71 is also arranged at the boundary between the upper end region D and the middle region E. ing. Moreover, the inner side elastic member 71 in the diaper 1 is distribute | arranged over the full length of the X direction in the stomach side part A, and is arrange | positioned and fixed between the inner layer sheet | seat 13 and the auxiliary sheet | seat 15 in the expansion | extension state. The number of the inner elastic members 71 arranged in the waistline regions A2 and B2 is preferably 2 or more, more preferably 3 or more, and preferably 12 or less, more preferably 9 or less, For example, 2 to 12 are preferable, and 3 to 9 are more preferable. The number of inner elastic members 71 disposed in the middle region E of the waist regions A2 and B2 is preferably 1 or more, more preferably 2 or more, and preferably 6 or less, more preferably 4 For example, 1 to 6 is preferable, and 2 to 4 is more preferable.

Further, waistline region A2, B2 is the auxiliary seat 15 in the respective upper end region D and a lower end region F, the junction area ratio between the inner sheet 13 or the absorbent body 10, from the bonded area ratio in the middle area E Is also high. The difference in the bonding area ratio is preferably 40 percentage points or more, more preferably 60 percentage points or more.
More specifically, in the upper end region D, a joining portion 21 having a predetermined width joined between the auxiliary sheet 15 and the inner layer sheet 13 via an adhesive is formed so as to extend in the X direction. . Also in the lower end region F, a joint portion 23 having a predetermined width is formed so as to extend in the X direction between the auxiliary sheet 15 and the inner layer sheet 13 or the absorbent main body 10 via an adhesive. In contrast, in most of the middle area E, as shown in FIG. 5, only through the adhesive 16 applied to the inner elastic member 7, and the auxiliary sheet 15 and the inner sheet 13 is bonded Yes. Between the adjacent inner elastic members 71, the non-joining area | region M in which the auxiliary sheet 15 and the inner layer sheet 13 are not joined is formed.

The bonding area ratio (the bonding area ratio between the auxiliary sheet and the inner layer sheet or the absorbent main body) in each of the upper end region D, the middle region E, and the lower end region F is measured as follows.
<Measuring method of bonding area ratio>
The total area of each of the upper end region D, the middle region E, and the lower end region F (planar area in the unfolded and elongated state) is defined as a region area S1. The area of the portion where the two are bonded is defined as a bonding area S2. And a junction area rate (%) is calculated | required by following Formula (1).
Bonding area ratio (%) = (bonding area S2 / region area S1) × 100 (1)
The bonding area S2 is the total area of the area where the auxiliary sheet 15 and the inner layer sheet 13 are bonded and the area where the auxiliary sheet 15 and the absorbent main body 10 are bonded.
In addition, the adhesive is applied to one or both of the auxiliary sheet 15 and the inner layer sheet 13 or the absorbent main body 10 in a pattern such as spiral, stripe, dot (scattered), wave (wavy line), When the auxiliary sheet 15 and the inner layer sheet 13 or the absorbent main body 10 in the end flap portion are bonded by the adhesive, the area of the adhesive application portion is defined as the bonding area. However, among the adhesives applied in a plurality of patterns such as stripes, dots (scattered dots), waves (wavy lines), etc., the portions whose distances are within 5 mm are also bonded between the patterns. I reckon. Further, in the case of a coating having an adhesive non-application part surrounded by an adhesive application part, such as a spiral pattern, it is considered that the adhesive non-application part is also joined.
When each area is measured from a commercially available product, it can be measured by the following method.
First, a commercially available product is developed and stretched, and the toner is applied. Next, the toner is removed by blowing air. Then, the adhesive application part colored with the toner is observed.
Thereafter, an OHP film is placed on the product, and the outline of the adhesive application part is written. Using the dedicated software (Image-ProPlus: manufactured by Nippon Roper Co., Ltd.) that can measure the area, the image written on the OHP film is taken into a personal computer with a scanner, and each area is obtained.

Further, between the outer layer sheet 12 and the inner layer sheet 13 in the waistline regions A2 and B2, a non-joining region R2 is provided in a region overlapping the arrangement region R1 of the inner elastic member 71 in the middle region E.
More specifically, as shown in FIG. 3 and FIG. 4, the inner elastic member 71 is fixed between the inner layer sheet 13 and the auxiliary sheet 15 without being joined to the outer layer sheet 12, so that the waistline region A <b> 2. , B2 is formed with a non-joining region R2 in which the outer layer sheet 12 and the inner layer sheet 13 are not continuously joined in the Y direction. The non-bonding region R2 in the present embodiment extends from the middle region E to the upper end region D on the upper side in the Y direction. On the lower side in the Y direction, the end of the non-joining region R2 substantially coincides with the position of the boundary portion between the middle region E and the upper end region D. Further, in the X direction, both ends in the X direction are located at the side seal portion S or in the vicinity thereof, and extend over substantially the entire width of the ventral side portion A.

  As shown in FIGS. 3 and 4, the waist elastic member 51 is fixed to the inner surface (skin surface) in the region R <b> 3 above the arrangement region R <b> 1 of the inner elastic member 71 in the outer layer sheet 12. Further, the number of the waist elastic members 51 or more than half of the length in the longitudinal direction Y does not overlap with the inner layer sheet 13. More specifically, in the diaper 1 of the present embodiment, a plurality (five in the illustrated example) of waist elastic members 51 extend in the region R3 over the entire width of the ventral portion A in the width direction. It is arranged with. Due to the contraction of the waist elastic member 51, a waist gather is formed at the peripheral edge of the waist opening 5, and the fit in the waist opening is improved. However, the upper end 13u of the inner layer sheet 13 is positioned below the lowermost waist elastic member 51 in the Y direction, and the inner layer sheet 13 does not overlap any of the waist elastic members 51. Therefore, in the present embodiment, the number of waist elastic members 51 overlapping the inner layer sheet 13 is zero, and 100% of the waist elastic members 51 do not overlap the inner layer sheet 13. Further, the longitudinal length of the waist elastic member means that when a plurality of waist elastic members are arranged, the distance between the upper end of the uppermost member and the lower end of the lowermost member is the longitudinal length. To do. When a single sheet-like waist elastic member is disposed, the length in the vertical direction is the distance between the upper end and the lower side of the waist elastic member. In the present embodiment, 100% of the length in the longitudinal direction Y of the waist elastic member 51 does not overlap with the inner layer sheet 13. It is preferable that the inner layer sheet 13 does not overlap with the number of the waist elastic members 51 or more than half (= 50%) of the length in the longitudinal direction Y, and it does not overlap with the waist elastic members 51 at all. From the viewpoint of preventing irregular contraction in the vicinity of the upper end 13u and preventing the appearance of the floating portion G from being deteriorated.

  In addition, the waist elastic member 51 in the diaper 1 of this embodiment is between the outer layer sheet | seat 12 and the inner layer sheet | seat 13 only through the adhesive agent applied to the elastic member 51 similarly to the inner side elastic member 71 mentioned above. It is joined. Between the adjacent waist elastic members 51, the non-joining area | region where the outer layer sheet | seat 12 and the inner layer sheet | seat 13 are not joined is formed. Further, it is preferable that a plurality of waist elastic members 51 are arranged at intervals in the Y direction. The number of waist elastic members 51 arranged on the ventral side A and the back side B is preferably 3 or more, more preferably 4 or more, and preferably 15 or less, more preferably 12 each. For example, 3 to 15 are preferable, and 4 to 12 are more preferable.

  Further, the lower end region F side of the auxiliary sheet 15 is joined to the absorbent main body 10 over a length of 5 mm or more and 50 mm or less in the longitudinal direction Y. More specifically, in the diaper 1 of this embodiment, as shown in FIGS. 3 and 4, the above-described joint portion 23 is formed in the lower end region F. The auxiliary sheet 15 in the lower end region F is overlapped and bonded to the skin surface side of the absorbent main body 10 by the adhesive forming the bonding portion 23. In the case of a diaper for adults, by making the length L10 in the Y direction of the portion where the auxiliary sheet 15 is joined to the absorbent main body 10 to be 5 mm or more, it is possible to reliably prevent structural breakage during wearing. Moreover, by setting it as 50 mm or less, it can prevent that the length which overlaps with an absorptive main body becomes long, an absorption area | region reduces, or it becomes easy to leak from the front and back. The length L10 is preferably 10 mm or more, more preferably 15 mm or more, and is preferably 45 mm or less, more preferably 30 mm or less, for example, preferably 10 to 45 mm, more preferably 15 to 30 mm. In the case of diapers for infants, it is preferably 10 mm or more, more preferably 15 mm or more, preferably 30 mm or less, more preferably 25 mm or less, for example, preferably 10 to 30 mm, more preferably 15 mm. ~ 25.

A plurality of lower elastic members 91 extending in the X direction are arranged at intervals in the Y direction in the crotch region A3 of the ventral side A of the diaper 1 of the present embodiment.
As shown in FIG. 4, the lower elastic member 91 is joined to the inner surface (skin surface) of the outer layer sheet 12. More specifically, the lower elastic member 91 is joined via an adhesive between the outer layer sheet 12 and the inner layer sheet 13 sandwiching each of the lower elastic members 91.
The lower elastic member 91 is preferably arranged in a state of being divided into left and right at the X-direction central portion of the inseam-lowering regions A3 and B3. In other words, it is preferable that the inseam areas A3 and B3 exhibit a stretching force outside the both side edges of the absorbent main body 10. On the other hand, it is preferable that the lower elastic member 91 has a non-stretchable region where the elastic force is not exhibited at the X-direction central portion overlapping the absorbent main body 10. The lower elastic member 91 may not be disposed in the non-stretchable regions of the inseam regions A3 and B3, or the lower elastic member 91 may be disposed in a state in which the elastic property is not exhibited. For example, the non-stretchable region may be a portion where the lower elastic member 91 is cut so as to generate a plurality of fragments in which the extended state is released.

The number of lower elastic members 91 arranged in the inseam region A3 is preferably 3 or more, more preferably 5 or more, and preferably 15 or less, more preferably 10 or less. It is preferable that it is -15, More preferably, it is 5-10. Here, when the lower elastic member 91 is divided in the X direction as in this embodiment, the number of the lower elastic members 91 is counted as one by combining the left and right two.
A leg elastic member 61 is further disposed on the exterior body 11. The leg elastic member 61 is curved and disposed so that both end portions in the X direction are located on the ventral side portion A or the back side portion B and the center side in the X direction is located on the crotch portion C. The leg elastic member 61 is arranged in an extended state between the outer layer sheet 12 and the inner layer sheet 13, and forms leg gathers that contract along the legs around the leg openings 6 and 6 of the diaper 1. .
The lower elastic member 91 and the leg elastic member 61 are bonded to each other between two adjacent sheets via an adhesive applied to one or both sheets, and between the elastic member and the elastic member. The sheets are also joined at the center position.

  As shown in FIGS. 2 and 3, the absorbent main body 10 has a rectangular shape that is long in the same direction as the longitudinal direction (Y direction) of the diaper, and is a liquid-permeable top sheet 2, liquid-impermeable or liquid-impermeable. The liquid-retaining absorbent body 4 is disposed between the sheet 2 and the sheet 2 and the back sheet 3 having the property (water repellency, etc.). The absorbent body 4 includes an absorbent core made of an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core 40 in which particles of a water-absorbing polymer are held, and the absorbent core 40. A core wrap sheet 46 covering the The absorber 4 is also formed in a rectangular shape that is long in the Y direction. The absorbent core 40 is preferably a fluff pulp fiber product or a mixed product of fluff pulp and a water-absorbing polymer. Various known materials can be used as the core wrap sheet 46, and for example, a thin paper such as tissue paper or a water-permeable nonwoven fabric is preferably used. Even if the core wrap sheet 46 covers the skin surface side and the non-skin surface side of the absorbent core 40 with separate sheets, the core wrap sheet 46 is a single sheet, and the skin surface side and the non-skin surface side of the absorbent core 40 And may be coated.

  Further, in the present diaper 1, as shown in FIG. 2, side cuffs 8, 8 made of a liquid-resistant or water-repellent and breathable material are provided on both left and right sides of the absorbent main body 10 in the longitudinal direction. Is formed. In the vicinity of the free end of each side cuff 8, a plurality of side cuff elastic members 81 are arranged in an expanded state. The side cuff 8 stands up when wearing a diaper and prevents the liquid from flowing out to the side.

  The diaper 1 of this embodiment can be easily mounted by pulling up the leg area 6 and 6 and then pulling it up in the vicinity of the waist region, similarly to the conventional pants-type disposable diaper.

According to the diaper 1 of the present embodiment, the inner elastic member 71 is disposed between the inner layer sheet 13 and the auxiliary sheet 15 at least in the middle region E as described above. Furthermore, the bonding area ratio between the inner layer sheet 13 and the auxiliary sheet 15 in the middle region E is low. Therefore, the auxiliary sheet 15 and the inner layer sheet 13 do not become hard, the feel on the inner surface side of the diaper 1 becomes soft, and the wearability of the wearer is excellent.
In addition, a non-bonding region R2 is provided between the outer layer sheet 12 and the inner layer sheet 13. As a result, the outer layer sheet 12 swells outward from the diaper and easily floats from the inner layer sheet 13 to form the floating portion G. And the touch of the outer surface of a diaper is soft, and it is easy to give a soft impression.
The floating part G serves as an external force buffering region. That is, even if the outer layer sheet 12 is twitched or distorted due to an external force applied by the outer garment during the wearer's operation, the external force that causes the outer layer sheet 12 to twitch or distort due to the presence of the floating portion G. It is difficult to be transmitted to the inner layer sheet 13. Therefore, an external force suppresses the movement and deformation of the diaper such as displacement, and an excellent wearing feeling or the like is obtained. Moreover, when the floating part G arises, the external appearance of the diaper 1 will give a soft impression, and the aesthetics of the diaper 1 will improve.

  And in the diaper 1 of this embodiment, the waist elastic member 51 and the lower elastic member 91 which shrink | contract in the waistline direction exist above and below the floating part G. Therefore, the three-dimensional formability of the floating part G is excellent. Moreover, since the sheet or the like located on the skin surface side of the floating portion G is fixed in close contact with the skin by the inner elastic member 71, the floating portion G is less likely to be unevenly anteroposteriorly and laterally, and the three-dimensional structure of the floating portion G Formability is not easily impaired. For this reason, the external force buffering effect by the floating portion G is reliably exerted even when walking or standing or sitting, etc., and a decrease in wearing feeling or the like is prevented.

  Further, when the joint area ratio between the inner layer sheet 13 and the auxiliary sheet 15 in the waistline regions A2 and B2 is lowered as a whole, peeling occurs between the sheets when pulling up with the vicinity of the waist regions A1 and B1. The structure of diapers is easily broken. However, in the diaper 1 of this embodiment, the joining area ratio of the lower end region F is relatively high to the middle region E, and the auxiliary sheet 15 is joined to the absorbent main body 10 so as to overlap in the lower end region F. Yes. Therefore, when pulling up with the vicinity of the waist areas A1 and B1, the auxiliary sheet 15 is peeled off from the inner layer sheet 13 and the structure of the diaper is thereby effectively prevented.

  Further, the contraction force of the waist elastic member 51 is reduced by not overlapping with more than half of the inner layer sheet 13 and the waist elastic member 51 and the joint area ratio of the upper end region D being relatively higher than that of the middle region E. Can be buffered. And it can prevent that the non-uniform | heterogenous force by shrinkage | contraction of the waist elastic member 51 is transmitted to the middle area | region E. FIG. Thereby, it is possible to prevent the inner layer sheet 13 in the upper end region D from being irregularly contracted to generate irregular wrinkles and the inner layer sheet 13 to be bent inward and outward, and to further improve flexibility. it can.

From the viewpoint of more surely obtaining the above-described effect of 1 or 2 or more, the ratio of the junction area ratio of the upper end region D to the junction area ratio of the middle region E (the former / the latter) is preferably 1.5 or more, more preferably Is 2 or more, preferably 20 or less, more preferably 15 or less, for example, preferably 1.5 to 20, more preferably 2 to 15. The ratio of the junction area ratio of the lower end region F to the junction area ratio of the middle region E (the former / the latter) is preferably 1.2 or more, more preferably 1.5 or more, and preferably 15 or less. Preferably it is 12 or less, for example, it is preferable that it is 1.2-15, More preferably, it is 2-15.
From the same viewpoint, the length L1 of the waist regions A1 and B1 in the Y direction is preferably 2% or more, more preferably 4% or more, and preferably 20% of the total length L of the pant-type absorbent article. Hereinafter, it is more preferably 15% or less, for example, preferably 2 to 20%, more preferably 4 to 15%. From the same viewpoint, the length L2 in the Y direction of the waist regions A2 and B2 is preferably 5% or more, more preferably 7% or more, and preferably 17% of the total length L of the pant-type absorbent article. Hereinafter, it is more preferably 15% or less, for example, preferably 5 to 17%, more preferably 7 to 15%.
The length in the Y direction of the arrangement region R1 is preferably 5% or more, more preferably 10% or more, and preferably 80% of the length L2 in the same direction of the waist regions A2 and B2. Hereinafter, it is more preferably 60% or less, for example, preferably 5 to 80%, more preferably 10 to 60%. The length in the Y direction of the non-bonded region R2 is preferably 40% or more, more preferably 50% or more, and preferably 85% or less of the length L2 in the same direction of the waist regions A2 and B2. More preferably, it is 75% or less, for example, it is preferable that it is 40 to 85%, More preferably, it is 50 to 75%.

  In addition, the bonding area ratio of the upper end region D and the bonding area ratio of the lower end region F buffer the contraction force of the waist elastic member and the lower elastic member, and prevent the non-uniform force from being transmitted to the middle region, and From the viewpoint of improving durability at the time of wearing, each is preferably 15% or more, more preferably 30% or more, and preferably 90% or less, more preferably 70% or less. It is preferable that it is -90%, More preferably, it is 30-70%. From the same viewpoint, the length of the joining portion 21 in the upper end region D in the Y direction (the length of only the portion existing in the upper end region D) is preferably 25% or more of the length in the Y direction of the upper end region D. More preferably, it is 40% or more, preferably 100% or less, more preferably 80% or less, for example, preferably 25 to 100%, more preferably 40 to 80%. The length in the X direction is preferably 60% or more, more preferably 80% or more, and preferably 100% or less of the width W1 between the side seal portions of the ventral side A or the back side B. For example, it is preferably 60 to 100%, and more preferably 80 to 100%.

  In addition, the bonding area ratio of the middle region E is preferably 1% or more, more preferably 3% or more, and preferably 20% or less from the viewpoint of flexibility, stretchability, and formability of the floating portion G. For example, it is preferably 1 to 20%, more preferably 3 to 20%. From the same viewpoint, the length of the joining portion 23 in the lower end region F in the Y direction (the length of only the portion existing in the lower end region F) is preferably 20% or more of the length in the Y direction of the lower end region F. More preferably, it is 40% or more, preferably 100% or less, more preferably 80% or less, for example, preferably 20 to 100%, more preferably 40 to 80%. The length in the X direction of the lower end region F is preferably 60% or more, more preferably 80% or more, and preferably 100% of the width W1 between the side seal portions of the ventral portion A or the back portion B. %, For example, it is preferably 60 to 100%, more preferably 80 to 100%.

  In addition, it is preferable that the bonding area ratio in the upper end region D is higher than the bonding area ratio in the lower end region F from the viewpoint of both flexibility and high durability. In this case, the length of the joint 23 in the lower end region F in the Y direction (the length of only the portion existing in the lower end region F) is preferably 20% or more of the length of the lower end region F in the Y direction. Preferably it is 35% or more, Preferably it is 95% or less, More preferably, it is 75% or less. From the same viewpoint, the ratio (the former / the latter) of the bonding area ratio of the upper end region D and the bonding area ratio of the lower end region F is preferably 1.1 or more, more preferably 1.3 or more, and preferably Is 5.0 or less, more preferably 2.5 or less, still more preferably 2.3 or less, for example, preferably 1.1 to 5.0, more preferably 1.1 to 2.5. Even more preferably, it is 1.3 to 2.3.

Moreover, in the diaper 1 of this embodiment, as shown in FIG. 4, in the part in which the absorptive main body 10 is not arranged in the lower end region F, the outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15 are each sheet. They are integrated in the thickness direction by an intervening adhesive. Thereby, durability at the time of putting on improves further.
The length in the Y direction of the region R3 in which the outer layer sheet 12, the inner layer sheet 13 and the auxiliary sheet 15 are integrated in the thickness direction is preferably 30% or more of the length in the Y direction of the lower end region F, more preferably It is 50% or more, preferably 100% or less, for example, preferably 30 to 100%, and more preferably 50 to 100%.

  Further, it is preferable that no elastic member is disposed in the region R3 as shown in FIG. Since the elastic member is not disposed in the region R3, the smoothness of each sheet is maintained and the adhesive strength is increased, so that the durability at the time of wearing is further improved.

  In the diaper 1 of the present embodiment, as shown in FIG. 3, the adhesive 21 a that joins the inner layer sheet 13 and the auxiliary sheet 15 in the upper end region D extends above the upper end 13 u of the inner layer sheet 13. Exist. The outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15 in the vicinity of the upper end 13u of the inner layer sheet 13 are integrated in the thickness direction through the extending adhesive 21a. By integrating these three sheets, the durability when worn is further improved.

  In the diaper 1 of this embodiment, the absorbent main body 10 covers the absorbent body 4 in which both the front and back surfaces and both side surfaces of the absorbent core 40 are covered with the core wrap sheet 46, and both the front and back surfaces of the absorbent body 4. A top sheet 2 and a back sheet 3 are provided. The core wrap sheet 46 is bonded to the front and back surfaces of the absorbent core 40 by a pattern-coated adhesive. At the same time, the core wrap sheets 46 are joined to each other by an adhesive at portions extending from both ends of the absorbent core 40 in the longitudinal direction. At both ends in the longitudinal direction of the absorbent main body 10, the top sheet 2 and the back sheet 3 are joined to the core wrap sheet 46 by an adhesive or other joining means, or further extended from the core wrap sheet. Are joined together by an adhesive or other joining means.

Moreover, the absorptive core 40 has the V-shaped or U-shaped notch 44 in the both ends of the Y direction. This notch part 44 improves the deformability of the edge part of the absorptive core 40, and improves the fitting property with respect to a wearer. The auxiliary sheet 15 in the lower end region F has a portion 15c joined to a portion where the cutout portion 44 exists inside the absorbent main body 10 (region overlapping with the cutout portion) in the central portion of the diaper 1 in the X direction. Have. On both sides of the joined portion 15 c, there are portions 15 s and 15 s joined to a portion where the absorbent core 40 exists inside the absorbent main body 10 (region overlapping the absorbent core).
Thereby, when the auxiliary sheet 15 is pulled upward by the lifting operation, the tensile force applied to the auxiliary sheet 15 is dispersed in the peripheral part of the notch 44, and the structure of the absorbent core 40 and the peripheral part of the absorbent core 40. Makes it hard to break.

Note that the portions 15 s and 15 s joined to the portion where the absorbent core 40 exists in the absorbent main body 10 overlap the portions 45 and 45 located on both sides of the notch 44 at the end of the absorbent core 40. . Further, the portion 15c and the portions 15s and 15s are respectively formed from the notch portion 44 or the constituent members of the absorbent main body 10 existing in the portions 45 and 45 located on both sides thereof, such as the topsheet 2 and the core wrap sheet 46. It is preferable from the viewpoint of making it difficult for structural destruction of the absorbent article to occur at the time of wearing.
Moreover, the absorptive core 40 shown in FIG. 2 has the center absorption core 41 located in the center of the width direction, and the side part absorption core 42 located in the both sides. However, the absorbent core 40 may be composed only of the central absorbent core 41 without the side absorbent cores 42, and the central absorbent core 41 in that case is narrowed at the center in the Y direction. It may be the one that is, or the one that is not bundled.

The formation material of each part of the diaper 1 mentioned above is demonstrated.
As the top sheet 2, the back sheet 3, the absorbent body 4, the side cuff 8 forming sheet, and the like, various kinds of materials conventionally used for absorbent articles such as disposable diapers can be used without particular limitation. For example, as the surface sheet 2, a single layer or multilayer nonwoven fabric, an apertured film, or the like can be used. As the back sheet 3, a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used. The back sheet 3 may or may not have moisture permeability.

  Moreover, as the outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15, various sheet materials conventionally used for absorbent articles such as disposable diapers can be used without particular limitation, but it is preferable to use a nonwoven fabric. As the nonwoven fabric, an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a single layer nonwoven fabric of a melt blown nonwoven fabric, or a laminated nonwoven fabric in which these layers are laminated in two or more layers is preferable. Moreover, the sheet | seat etc. which integrated the nonwoven fabric and the film can also be used as the outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15.

Each of the outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15 is preferably a spunbonded nonwoven fabric, particularly a spunbonded nonwoven fabric having a basis weight of 20 g / m ² or less.
By using a spunbonded nonwoven fabric excellent in tensile strength, the basis weight of each sheet can be reduced. By reducing the rigidity of the sheet, the formability of the floating portion G and the shape stability for maintaining the external force buffering effect by the floating portion G are improved. In addition, since the spunbonded nonwoven fabric having a basis weight of 20 g / m ² or less is excellent in smoothness, the adhesion between the members made of a sheet or an elastic member is improved. And since the usage-amount of an adhesive agent can be reduced, the improvement of the softness | flexibility of the floating part G and the diaper 1 is also realizable. It is preferable from the viewpoint of improving the tensile strength of the diaper 1 that the outer layer sheet 12 has a basis weight equal to or larger than that of the inner layer sheet 13 and the auxiliary sheet 15. According to the diaper 1 of this embodiment, even when a spunbond nonwoven fabric, which is generally a hard nonwoven fabric, is used as the outer layer sheet 12, the three-dimensional formability of the floating portion G is good, and the soft impression is given. Can be given.
The spunbonded nonwoven fabric is preferably subjected to softening. Examples of the softening process include a softener coating on a nonwoven fabric, embossing at the time of manufacture, and a softener kneading into a raw material resin.

Moreover, it is preferable to use a non-extensible sheet for the outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15, particularly the outer layer sheet 12. The “non-extensible sheet” has at least a maximum elongation of 10% or less in the width direction (X direction) of the diaper (pants-type absorbent article) (the length can be extended only up to 1.1 times). preferable.
<Measurement method of maximum elongation>
A sample piece having a length of 50 mm and a width of 25 mm is prepared, and the sample piece is fixed between chucks using a Tensilon device. Elongation is performed at a speed of 300 mm / min, and the elongation at the time of breaking is defined as the maximum elongation. The point of time when the fracture occurs is a point at which the tensile load shows the maximum value in the relationship curve between the elongation rate and the load.

  Examples of the material for forming the elastic members 51, 61, 71, 81, 91 include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, EVA, stretchable polyolefin, and polyurethane. As a form of the elastic member, a cross-sectionally rectangular, square, circular, elliptical or polygonal thread shape (thread rubber or the like), a string shape (flat rubber etc.), or a multifilament type thread shape or the like It can be preferably used.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, each of the outer layer sheet 12, the inner layer sheet 13, and the auxiliary sheet 15 does not have to be separate, and may be formed by folding one sheet.

  For example, the lamination | stacking state of the sheet | seat of an exterior body in the ventral part A and / or the back side part B can also be changed as shown in FIG. Although FIG. 6 shows a stacked state in the ventral side A, the back side B can be configured similarly to the ventral side A.

In the exterior body 11 </ b> A shown in FIG. 6A, there is no auxiliary sheet 15 separate from the outer layer sheet 12 and the inner layer sheet 13. The folded-back portions 12a and 12b of the outer layer sheet 12 constitute an auxiliary sheet that extends over the top and bottom of the longitudinal end of the absorbent main body.
The exterior body 11B shown in FIG. 6B does not have the folded-back portions 12a and 12b of the outer layer sheet. The auxiliary sheet 15 is arranged so as to extend from the outer surface side of the outer layer sheet 12 to the inner surface side of the inner layer sheet 13.

  In the exterior body 11 </ b> C shown in FIG. 6C, the auxiliary sheet 15 is laminated on the skin surface side of the folded portion 12 a of the outer layer sheet 12. The waist elastic member 51 is bonded and fixed between the outer layer sheet 12 and the folded portions 12 a and 12 b and between the outer layer sheet 12 and the auxiliary sheet 15.

  Moreover, in the diaper 1 of said embodiment, it had waist part area | region A2, B2 in which the outer layer sheet | seat, the inner layer sheet | seat, and the auxiliary | assistant sheet | seat have overlapped in both the back side part B and the ventral | abdominal side part A. Moreover, it has the upper end area | region D of the structure as shown in FIG.3 and FIG.4, the middle area | region E, and the lower end area | region F. FIG. However, only the ventral region A may have the waistline region A2 and the upper end region D, middle region E, and lower end region F configured as shown in FIGS. In that case, the dorsal side portion B may have only a part of the configuration of the ventral side portion A described with reference to FIGS. 3 and 4.

In addition, the exterior body is replaced by a structure in which the outer layer sheet 12 and the inner layer sheet 13 are continuous over the abdominal side part A, the crotch part C, and the back side part B, respectively. B may be provided with separate sheets. The separate sheet is one or two sheets selected from the outer layer sheet 12 and the inner layer sheet 13.
The pants-type absorbent article may be a pants-type sanitary napkin or the like in addition to a pants-type disposable diaper for infants or adults.
The description omission part in one embodiment mentioned above and the requirements which only one embodiment has can be applied suitably to other embodiment, respectively. Moreover, the requirements in each embodiment can be interchanged with each other as appropriate.

The present invention further discloses the following embodiments with respect to the above-described embodiments.
<1>
A pants-type absorption comprising an exterior body and an absorbent main body fixed to the skin surface side of the exterior body, and having a longitudinal direction extending from the abdominal side portion through the crotch portion to the back side portion and a width direction intersecting with the longitudinal direction A sex product,
The exterior body in the abdominal side is an outer layer sheet, an inner layer sheet positioned on the skin surface side of the outer layer sheet, and the upper and lower ends of the absorbent main body positioned on the skin surface side of the inner layer sheet. Has an auxiliary sheet extending,
A waistline region in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet overlap is divided into four equal parts in the longitudinal direction, and consists of an upper end region consisting of an upper end region, a middle region consisting of two central regions, and a lower end region. When it is divided into the bottom area,
An inner elastic member is disposed along the width direction between the inner layer sheet and the auxiliary sheet in at least the middle region,
It said auxiliary seat in each of the upper region and the lower region, the junction area ratio between the inner layer sheet or the absorbent body is higher than the bonding area ratio in the in area,
Between the outer layer sheet and the inner layer sheet, it has a non-joining region in a region overlapping the arrangement region of the inner elastic member in the middle region,
The auxiliary sheet is positioned within the range of not less than 5mm than on 8 0 mm in the crotch portion direction from the longitudinal end portion of the lower end thereof before Symbol absorbent body, and, following long 5mm or more on 5 0 mm in the longitudinal direction A pants-type absorbent article that is joined to the absorbent main body over the entire length.

<2>
A waist elastic member is fixed to the skin surface of the outer layer sheet in a region above the region where the inner elastic member is disposed, and the number of the waist elastic members or more than half of the length in the longitudinal direction is the inner layer sheet. The pants-type absorbent article according to the above <1>, which does not overlap.
<3>
The pants-type absorbent article according to <2>, wherein the waist elastic member and the inner layer sheet do not overlap at all.
<4>
The exterior body is a pants-type absorbent article in which both side edge portions in the abdominal side portion and both side edge portions in the back side portion are joined to each other, and a pair of side seal portions are formed by the joining. There,
<1>, wherein a joint portion having a predetermined width is formed across the width direction (X direction) between the auxiliary sheet and the inner layer sheet in the upper end region, which is joined via an adhesive. The underpants-type absorbent article according to any one of to <3>.

<5>
The length in the width direction (X direction) of the joint portion in the upper end region is 60% or more, preferably 80% or more, and 100% or less of the width between the pair of side seal portions. 4> The underpants type absorbent article described in 4>.
<6>
The length in the longitudinal direction (Y direction) of the joint portion in the upper end region is 25% or more, preferably 40% or more, and 100% or less of the longitudinal direction (Y direction) length of the upper end region. The pants-type absorbent article according to any one of <1> to <5>, preferably 80% or less.
<7>
A joint portion having a predetermined width is formed across the entire width direction (X direction) between the auxiliary sheet in the lower end region and the inner layer sheet or the absorbent main body via an adhesive. The underpants-type absorbent article according to any one of <1> to <6>.
<8>
The length in the width direction (X direction) of the joint portion in the lower end region is 60% or more, preferably 80% or more, and 100% or less of the width between the pair of side seal portions. The pants-type absorbent article according to 7>.
<9>
The length in the longitudinal direction (Y direction) of the joint portion in the lower end region is 20% or more, preferably 35% or more, more preferably 40% or more, of the longitudinal direction (Y direction) length of the lower end region. The pant-type absorbent article according to any one of <1> to <8>, which is 100% or less, preferably 95% or less, more preferably 80% or less, and even more preferably 75% or less. .

<10>
The bonding area ratio of the upper end region and the bonding area ratio of the lower end region are each 15% or more, preferably 30% or more, and 90% or less, preferably 70% or less, <1> to <9 > The underpants type absorbent article of any one of>.
<11>
The pants-type absorbent article according to any one of <1> to <10>, wherein a bonding area ratio of the middle region is 1% or more, preferably 3% or more and 20% or less.
<12>
The auxiliary seat in each of the upper region and the lower region, the bonding area ratio between the inner layer sheet or the absorbent body, than the joint area ratio in the in area, higher than 40 percentage points, preferably The pants-type absorbent article according to any one of the above items <1> to <11>, which is 60 percentage points or more.
<13>
<1> to <12> The ratio of the bonding area ratio of the upper end region to the bonding area ratio of the middle region is 1.5 or more, preferably 2 or more, 20 or less, preferably 15 or less. The underpants type absorbent article according to any one of the above.
<14>
The ratio of the bonding area ratio of the lower end region to the bonding area ratio of the middle region is 1.2 or more, preferably 1.5 or more, and 15 or less, preferably 12 or less, <1> to < The underpants type absorbent article according to any one of 13>.

<15>
The pants-type absorbent article according to any one of <1> to <14>, wherein the bonding area ratio in the upper end region is higher than the bonding area ratio in the lower end region.
<16>
The ratio of the bonding area ratio of the upper end region to the bonding area ratio of the lower end region is 1.1 or more, preferably 1.3 or more, 5.0 or less, preferably 2.5 or less, more preferably 2 The underpants-type absorbent article according to any one of <1> to <15>, which is 3 or less.
<17>
<1>-<16>, wherein the lower end of the auxiliary sheet is 5 mm or more in the crotch direction from the longitudinal end portion of the absorbent main body and is located at 50 mm or less. Pants-type absorbent article.
<18>
The separation distance between the lower end of the auxiliary sheet and the position on the most crotch side in the region where the auxiliary sheet and the absorbent main body are joined is 0 mm or more, 30 mm or less, preferably 20 mm or less. The pants-type absorbent article according to any one of <1> to <17>.
<19>
<1> The length in the longitudinal direction in which the auxiliary sheet and the absorbent main body are joined is 10 mm or more, preferably 15 mm or more, and is 45 mm or less, preferably 30 mm or less. The underpants type absorbent article according to any one of ~ <18>.

<20>
Any one of <1> to <19>, in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet are integrated in the thickness direction in the lower end region where the absorbent main body is not disposed. The underpants-type absorbent article according to 1.
<21>
The length in the vertical direction (Y direction) of the integrated region is 30% or more, preferably 50% or more, and 100% or less of the vertical direction (Y direction) length of the lower end region. The pants-type absorbent article according to <20>, wherein
<22>
The pants-type absorbent article according to <20> or <21>, wherein no elastic member is disposed in a region where the outer layer sheet, the inner layer sheet, and the auxiliary sheet are integrated in the thickness direction.
<23>
The adhesive that joins the inner layer sheet and the auxiliary sheet in the upper end region extends above the upper end of the inner layer sheet, and through the adhesive, in the vicinity of the upper end of the inner layer sheet, The underpants-type absorbent article according to any one of <20> to <22>, wherein the outer layer sheet, the inner layer sheet, and the auxiliary sheet are integrated in a thickness direction.
<24>
<1> to <<, wherein a plurality of lower elastic members extending in the width direction (X direction) are arranged at intervals in the longitudinal direction (Y direction) in the crotch region near the abdomen. 23> The underpants type absorbent article of any one of.

<25>
The pant-type absorbent article has a waist region along a waist opening edge above and below the waistline region in each of the abdomen side portion and the back side portion, and a region near the crotch portion,
The length of the waist region in the longitudinal direction (Y direction) is 2% or more, preferably 4% or more, and 20% or less, preferably 15% or less of the total length of the pant-type absorbent article. The pants-type absorbent article according to any one of <1> to <24>.
<26>
The length in the longitudinal direction (Y direction) of the waistline region is 5% or more, preferably 7% or more, and 17% or less, preferably 15% or less of the total length of the pant-type absorbent article. The underpants-type absorbent article according to any one of <1> to <25>.
<27>
The length in the longitudinal direction (Y direction) of the region where the inner elastic member is disposed in the middle region is not less than 5%, preferably not less than 10% of the length in the longitudinal direction (Y direction) of the waistline region. , 80% or less, preferably 60% or less, the pant-type absorbent article according to the above <26>.
<28>
The length in the longitudinal direction (Y direction) of the non-bonded region is 40% or more, preferably 50% or more, and 85% or less, preferably, of the longitudinal direction (Y direction) length of the waistline region. The pants-type absorbent article according to <26> or <27>, which is 75% or less.
<29>
The absorptive main body includes an absorptive core having a V-shaped or U-shaped cutout at an end on the abdominal side, and the auxiliary sheet in the lower end region is at the center in the article width direction. It has a portion joined to the region that overlaps the notch in the absorbent main body, and has a portion joined to the region that overlaps the absorbent core in the absorbent main body on both sides, The underpants-type absorbent article according to any one of 1> to <28>.

<30>
The pants-type absorbent article according to any one of <1> to <29>, wherein the outer layer sheet, the inner layer sheet, and the auxiliary sheet are all made of a spunbonded nonwoven fabric.
<31>
The pant-type absorbent article according to any one of <1> to <30>, wherein the pant-type absorbent article is a pants-type disposable diaper for infants, a pants-type disposable diaper for adults, or a pants-type sanitary napkin. Sex goods.

1 Disposable diaper (pants-type absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5 Waist opening 6 Leg opening 10 Absorbent body 11, 11A-11C Exterior body 12 Outer sheet 12a, 12b Folded part 13 of outer sheet 13 Inner sheet 15 Auxiliary sheet 51 Waist elastic member 71 Inner elastic member 91 Lower elastic member A Abdominal side A1 Waist area A2 Girth area A3 Inseam area B Back side B1 Waist area B2 Girth area B3 Inseam area C Crotch area D Upper area E Middle area F Lower area G Floating area W Waist opening edge R1 Inner elastic member arrangement region R2 Non-joining region

Claims (8)

A pants-type absorption comprising an exterior body and an absorbent main body fixed to the skin surface side of the exterior body, and having a longitudinal direction extending from the abdominal side portion through the crotch portion to the back side portion and a width direction intersecting with the longitudinal direction A sex product,
The exterior body in the abdominal side is an outer layer sheet, an inner layer sheet positioned on the skin surface side of the outer layer sheet, and the upper and lower ends of the absorbent main body positioned on the skin surface side of the inner layer sheet. Has an auxiliary sheet extending,
A waistline region in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet overlap is divided into four equal parts in the longitudinal direction, and consists of an upper end region consisting of an upper end region, a middle region consisting of two central regions, and a lower end region. When it is divided into the bottom area,
An inner elastic member is disposed along the width direction between the inner layer sheet and the auxiliary sheet in at least the middle region,
It said auxiliary seat in each of the upper region and the lower region, the junction area ratio between the inner layer sheet or the absorbent body is higher than the bonding area ratio in the in area,
Between the outer layer sheet and the inner layer sheet, it has a non-joining region in a region overlapping the arrangement region of the inner elastic member in the middle region,
The auxiliary sheet is positioned within the range of not less than 5mm than on 8 0 mm in the crotch portion direction from the longitudinal end portion of the lower end thereof before Symbol absorbent body, and, following long 5mm or more on 5 0 mm in the longitudinal direction It is joined to the absorbent main body over the length ,
A pants-type absorbent article in which the bonding area ratio in the upper end region is higher than the bonding area ratio in the lower end region . A pants-type absorption comprising an exterior body and an absorbent main body fixed to the skin surface side of the exterior body, and having a longitudinal direction extending from the abdominal side portion through the crotch portion to the back side portion and a width direction intersecting with the longitudinal direction A sex product,
The exterior body in the abdominal side is an outer layer sheet, an inner layer sheet positioned on the skin surface side of the outer layer sheet, and the upper and lower ends of the absorbent main body positioned on the skin surface side of the inner layer sheet. Has an auxiliary sheet extending,
A waistline region in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet overlap is divided into four equal parts in the longitudinal direction, and consists of an upper end region consisting of an upper end region, a middle region consisting of two central regions, and a lower end region. When it is divided into the bottom area,
An inner elastic member is disposed along the width direction between the inner layer sheet and the auxiliary sheet in at least the middle region,
The bonding area ratio between the auxiliary sheet in each of the upper end area and the lower end area, and the inner layer sheet or the absorbent main body is higher than the bonding area ratio in the middle area,
Between the outer layer sheet and the inner layer sheet, it has a non-joining region in a region overlapping the arrangement region of the inner elastic member in the middle region,
The auxiliary sheet has a lower end located within a range of 5 mm to 80 mm in the crotch direction from a longitudinal end of the absorbent main body, and spans a length of 5 mm to 50 mm in the longitudinal direction. Is joined to the absorbent body,
Wherein in the lower end region, in the portion where the absorbent body is not disposed, the outer layer sheet, the inner sheet and the auxiliary sheet, that is integrated in the thickness direction, Pas Ntsu type absorbent article. The pants-type absorbent article according to claim 2, wherein an elastic member is not disposed in the region in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet are integrated in the thickness direction. A pants-type absorption comprising an exterior body and an absorbent main body fixed to the skin surface side of the exterior body, and having a longitudinal direction extending from the abdominal side portion through the crotch portion to the back side portion and a width direction intersecting with the longitudinal direction A sex product,
The exterior body in the abdominal side is an outer layer sheet, an inner layer sheet positioned on the skin surface side of the outer layer sheet, and the upper and lower ends of the absorbent main body positioned on the skin surface side of the inner layer sheet. Has an auxiliary sheet extending,
A waistline region in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet overlap is divided into four equal parts in the longitudinal direction, and consists of an upper end region consisting of an upper end region, a middle region consisting of two central regions, and a lower end region. When it is divided into the bottom area,
An inner elastic member is disposed along the width direction between the inner layer sheet and the auxiliary sheet in at least the middle region,
The bonding area ratio between the auxiliary sheet in each of the upper end area and the lower end area, and the inner layer sheet or the absorbent main body is higher than the bonding area ratio in the middle area,
Between the outer layer sheet and the inner layer sheet, it has a non-joining region in a region overlapping the arrangement region of the inner elastic member in the middle region,
The auxiliary sheet has a lower end located within a range of 5 mm to 80 mm in the crotch direction from a longitudinal end of the absorbent main body, and spans a length of 5 mm to 50 mm in the longitudinal direction. Is joined to the absorbent body,
The adhesive that joins the inner layer sheet and the auxiliary sheet in the upper end region extends above the upper end of the inner layer sheet, and through the adhesive, in the vicinity of the upper end of the inner layer sheet, the outer layer sheet, the inner layer sheet and the auxiliary sheet that is integrated in the thickness direction, Pas Ntsu type absorbent article. A pants-type absorption comprising an exterior body and an absorbent main body fixed to the skin surface side of the exterior body, and having a longitudinal direction extending from the abdominal side portion through the crotch portion to the back side portion and a width direction intersecting with the longitudinal direction A sex product,
The exterior body in the abdominal side is an outer layer sheet, an inner layer sheet positioned on the skin surface side of the outer layer sheet, and the upper and lower ends of the absorbent main body positioned on the skin surface side of the inner layer sheet. Has an auxiliary sheet extending,
A waistline region in which the outer layer sheet, the inner layer sheet, and the auxiliary sheet overlap is divided into four equal parts in the longitudinal direction, and consists of an upper end region consisting of an upper end region, a middle region consisting of two central regions, and a lower end region. When it is divided into the bottom area,
An inner elastic member is disposed along the width direction between the inner layer sheet and the auxiliary sheet in at least the middle region,
The bonding area ratio between the auxiliary sheet in each of the upper end area and the lower end area, and the inner layer sheet or the absorbent main body is higher than the bonding area ratio in the middle area,
Between the outer layer sheet and the inner layer sheet, it has a non-joining region in a region overlapping the arrangement region of the inner elastic member in the middle region,
The auxiliary sheet has a lower end located within a range of 5 mm to 80 mm in the crotch direction from a longitudinal end of the absorbent main body, and spans a length of 5 mm to 50 mm in the longitudinal direction. Is joined to the absorbent body,
The absorptive main body includes an absorptive core having a V-shaped or U-shaped cutout at an end on the abdominal side, and the auxiliary sheet in the lower end region is at the center in the article width direction. the has a portion bonded to a region which overlaps with the cutout portion of the absorbent body, respectively on both sides, that has a portion that is joined in a region overlapping with the absorbent core in the absorbent body, Pas Ntsu Mold absorbent article. The pants-type absorbent article according to any one of claims 2 to 5, wherein the bonding area ratio in the upper end region is higher than the bonding area ratio in the lower end region . A waist elastic member is fixed to the skin surface of the outer layer sheet in a region above the region where the inner elastic member is disposed, and the number of the waist elastic members or more than half of the length in the longitudinal direction of the waist elastic members is The pants-type absorbent article according to any one of claims 1 to 6 , which does not overlap with the inner layer sheet. The pants-type absorbent article according to any one of claims 1 to 7, wherein each of the outer layer sheet, the inner layer sheet, and the auxiliary sheet is made of a spunbonded nonwoven fabric.

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