JP2019098154A - Underpants type absorbent article - Google Patents

Abstract

To provide an underpants type absorbent article capable of suppressing deformation of an absorber in a waist part.SOLUTION: An underpants type absorbent article in one embodiment comprises: an absorber; a waist part; and a crotch part. The absorber is arranged on a crotch part. The waist part has a ventral part and a back side part provided on a trunk, and at least one of the ventral part and back side part is formed of a composite sheet. The crotch part is provided between the ventral part and the back side part, and holds an absorber with the ventral part and back side part. The composite sheet comprises an elastic sheet on which a notch is formed on an area facing the absorber, and includes an elastic layer, and a cover sheet which is not easily extended and shrunk relative to the elastic sheet and which covers the notch.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pants-type absorbent article such as a disposable diaper.

  In a pant-type absorbent article such as a diaper comprising an absorbent body and an exterior body for fixing the absorbent body, the stretchable nonwoven fabric is formed on the waist portion of the exterior body for the purpose of improving the fit to the waist of the wearer. Some are used. In a pants-type absorbent article using such stretchable nonwoven fabric, it is known that a low stretchable region obtained by cutting an elastic element is provided in a region of the waist portion facing the absorbent nonwoven fabric (for example, a patent) Reference 1). In such a configuration, since the stretchability of the stretchable nonwoven fabric is reduced in the region where the absorber of the waist portion is present, the stretch of the stretchable nonwoven fabric does not act on the absorber and wrinkles are not generated in the absorber. The absorption performance of the absorber is not inhibited.

Unexamined-Japanese-Patent No. 2010-57567

  The subject of the present invention relates to a pants-type absorbent article in which expansion and contraction due to the elastic sheet is less likely to act on the absorbent body in a pants-type absorbent article using an elastic sheet as the exterior body.

The underpants-type absorbent article which concerns on one form of this invention comprises an absorber, a waist part, and a crotch.
The above-mentioned absorber is located in the crotch.
The waist portion has a ventral side and a dorsal side located on the trunk, and at least one of the ventral side and the dorsal portion is made of a composite sheet.
The crotch is located between the ventral side and the dorsal side and holds the absorber with the ventral side and the dorsal side.
The composite sheet has an elastic sheet including an elastic layer, in which a notch is formed in a region facing the absorber, and a cover sheet that is less likely to expand and contract than the elastic sheet and covers the notch.

  ADVANTAGE OF THE INVENTION According to this invention, expansion-contraction of the waist part of a pants type absorbent article can not act on an absorber easily, and the discomfort at the time of mounting | wearing can also be reduced.

It is a perspective view of the disposable diaper concerning a 1st embodiment of the present invention. It is a top view which shows the unfolded state of the said disposable diaper, and is the figure seen from the outer surface side. It is sectional drawing which followed the III-III line of FIG. 2 of the said disposable diaper. It is sectional drawing along the IV-IV line of FIG. 2 of the said disposable diaper. It is the top view and sectional drawing of an elastic sheet (1st sheet | seat) which comprise the exterior body of the said disposable diaper. It is a partial enlarged plan view of the said disposable diaper, and is a figure explaining the joining state of the coating sheet in a composite sheet. It is a partial enlarged plan view of the disposable diaper which concerns on 2nd Embodiment, and is a figure explaining the joining state of the coating sheet in a composite sheet. It is a fragmentary sectional view of the disposable diaper concerning a 3rd embodiment. It is a partial enlarged plan view of the disposable diaper which concerns on 3rd Embodiment, and is a figure explaining the joining state of the coating sheet in a composite sheet. It is a top view which shows the unfolded state of the disposable diaper which concerns on 4th Embodiment, and is the figure seen from the outer surface side. It is a top view which shows the unfolded state of the disposable diaper which concerns on 5th Embodiment, and is the figure seen from the outer surface side. It is a partial enlarged plan view explaining the external shape of the waist panel which comprises a part of exterior body of the disposable diaper which concerns on 5th Embodiment. It is a partial enlarged plan view for demonstrating the modification of the pattern of the joining area | region in the composite sheet which concerns on 6th Embodiment. It is a partial enlarged plan view explaining the shape of the notch part of the waist panel of a disposable diaper provided with the exterior body of a division | segmentation type which concerns on other embodiment. It is a top view explaining the shape of the notch provided in the lamination sheet which constitutes a part of exterior body of a disposable diaper provided with the exterior body of an integral type concerning other embodiments. FIG. 21A is a partial enlarged plan view for explaining a modification of the shape of the notch portion of the waist panel or the exterior body according to the other embodiment, and the notch portion surrounded by the alternate long and two short dashes line in FIGS. It corresponds to the area S including the periphery.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the drawings, X axis, Y axis, and Z axis which are orthogonal to each other are shown as needed.

First Embodiment
[Whole composition of disposable diapers]
FIG. 1 is a perspective view of a disposable diaper 100 according to a first embodiment of the present invention. The disposable diaper 100 is a pant-type absorbent article for capturing, without leaking, the wastes of the baby who is the wearer. The disposable diaper 100 includes an exterior body 110 and an absorber 120. The exterior body 110 constitutes an exterior of the disposable diaper 100. The absorber 120 is held inside the exterior body 110. That is, the exterior body 110 is an outer surface that faces the inner surface of the absorber 120 that is directed to the wearer's skin side when worn, and is directed to the opposite side of the wearer's skin when worn. It is arrange | positioned at a certain outer surface (code | symbol 120a of FIG. 4 mentioned later). Hereinafter, the inside in each composition shows the side located in the wearer's skin side at the time of disposable diaper wearing, and the outside shows the side opposite to a wearer's skin side.

  The exterior body 110 is composed of a waist portion 111 and a crotch portion 112 formed in series. The waist 111 forms a waist opening 130 and is arranged around the waist of the wearer. The waist portion 111 is configured to be stretchable in the circumferential direction so as to fit around the waist of the wearer. The crotch portion 112 is located below the waist portion 111 in FIG. 1 and is disposed in the crotch region of the wearer.

  The waist portion 111 has a ventral side portion 111a disposed on the front side when worn and a back side portion 111b disposed on the back side. The ventral side portion 111a and the back side portion 111b are joined by, for example, a heat seal or an ultrasonic seal at side seal portions 113 provided at both widthwise end portions orthogonal to the front-rear direction. Thereby, the waist part 111 becomes cylindrical, and the waist opening part 130 is formed between the belly side part 111a and the back side part 111b.

  The crotch portion 112 is bridged and positioned between the ventral side 111a and the dorsal side 111b. The crotch portion 112 connects the ventral side portion 111 a and the back side portion 111 b so as to form a pair of leg openings 140 through which the wearer's leg is inserted on both sides in the width direction. The crotch 112 is provided with a leg gather 114 including a rubber thread 114 a disposed along the leg opening 140. The leg gathers 114 fit the legs of the wearer inserted in the leg openings 140 by the expansion and contraction of the rubber thread 114a.

  FIG. 2 is a plan view showing the unfolded state of the disposable diaper 100 of FIG. 1 as viewed from the outer surface side. The disposable diaper 100 shown in FIG. 2 peels off the side seal portion 113 from the state shown in FIG. 1 to separate the abdominal side portion 111a and the back side portion 111b, and further the outer package 110 and the absorber 120 along the XY plane. In the extended state.

  In the disposable diaper 100 shown in FIG. 2, the X-axis direction corresponds to the front-rear direction, the Y-axis direction corresponds to the width direction, and the Z-axis direction corresponds to the thickness direction. The circumferential direction of the ventral side portion 111a and the back side portion 111b of the waist portion 111 in FIG. 1 corresponds to the width direction (Y-axis direction) in FIG. Hereinafter, the disposable diaper 100 is demonstrated in the aspect shown in FIG.

  The absorber 120 captures excrement and is configured to be able to absorb the liquid contained in the excrement. The absorber 120 is formed in a band shape, and is disposed in a wide range from the crotch 112 in the exterior body 110 to the ventral side 111 a and the dorsal side 111 b of the waist portion 111. Thereby, in the disposable diaper 100, since the crotch of the wearer is covered with the absorber 120 over a wide range, excrement is unlikely to leak even if the wearer moves. Moreover, the absorber 120 absorbs the liquid mainly in the area | region which captures the excretion in the crotch 112. As shown in FIG. The liquid absorbed by the absorber 120 is sucked up toward the waist portion 111 without staying in the area. That is, the absorber 120 can hold the liquid in a wide range over the crotch portion 112 and the waist portion 111. Thus, in the disposable diaper 100, the absorber 120 can absorb a sufficient amount of liquid.

  The exterior body 110 is composed of the composite sheet 10. The composite sheet 10 includes a first sheet 11 which is an elastic sheet, a second sheet (reference numeral 12 in FIG. 3 described later), an adhesive layer (reference numeral 13 in FIG. 3 described later), and a covering sheet 160. In the present embodiment, the second sheet 12 is provided to face the inside of the first sheet (stretchable sheet) 11, and the first sheet 11 is positioned on the outer surface 110 a side of the exterior body 110. The detailed configuration of the composite sheet 10 will be described later.

  The exterior body 110 has a stretchable region P. In the stretchable region P, the exterior body 110 has stretchability in the trunk circumferential direction (the width direction (Y-axis direction in FIG. 2)). The waist portion 111 for which stretchability is required in the circumferential direction of the body has a stretch area P. Further, the waist portion 111 of the exterior body 110 has a facing region Q facing the absorber 120. In FIG. 2, the expansion / contraction area P is indicated by a dot pattern with small dots, the opposite area Q is indicated by a dot pattern with large dots, and the dots of the expansion / contraction area P and the opposite area Q are also shown in the drawings The pattern is similar. As shown in FIG. 2, the opposing region Q and the stretchable region P partially overlap each other in plan view.

  In the belly side portion 111a, the cutaway portion 115a is formed in a laminated sheet (hereinafter, may simply be referred to as a laminated sheet) in which the first sheet 11 and the second sheet 12 are laminated via the adhesive layer 13. The composite sheet 10 is formed, and the covering sheet 160a is disposed so as to cover the notch 115a. Similarly, the back side portion 111b is also composed of the composite sheet 10 in which the cutaway portion 115b is formed in the laminated sheet and the covering sheet 160b is disposed so as to cover the cutaway portion 115b. The notch 115a and the notch 115b have a congruent shape. Hereinafter, when it is not necessary to distinguish the notch 115a and the notch 115b in particular, both will be described as the notch 115. In addition, the covering sheet 160a and the covering sheet 160b have a congruent shape. Hereinafter, in the case where it is not necessary to distinguish between the covering sheet 160a and the covering sheet 160b, both will be described as the covering sheet 160.

  The contour 1151 of the laminated sheet defining the cutaway portion 115 is a flat rectangular shape. The contour 1151 is provided such that the length in the Y-axis direction (width direction) is shorter than that of the absorber 120. The contour 1151 has the same length in the X-axis direction as the substantially rectangular facing area Q. That is, when viewed from above, the outline of the laminated sheet defining the notch 115 is located within the facing area Q, one side of the rectangular outline 1151 overlaps one end of the absorber 120, and the remaining three sides Is located in the region where the absorber 120 is present. The outline 1151 of the laminated sheet corresponds to the edge of the notch 115.

  The notch 115 does not reach the peripheral edge of the waist opening 130 of the waist portion 111, and is formed in the laminated sheet, leaving the peripheral edge. Since the peripheral end includes the first sheet 11, in the disposable diaper 100, the belly side 111a and the back side 111b each have a stretchable area P over the entire Y-axis direction (width direction).

  In this embodiment, although the shape of the notch 115 formed in the coating sheet 160 has a rectangle, a shape is not limited to this. The covering sheet 160 may have a size and a shape that can cover at least the notch 115. The notch portion 115 is formed by cutting and removing the laminated sheet in a stretched state or a shrunk state with a rotary cutter, a water jet cutter, an ultrasonic cutter or the like. The cutaway portion 115 can also be formed by cutting with a rotary cutter, a water jet cutter, an ultrasonic cutter or the like to make a cut in the laminated sheet, and stretching the laminated sheet to widen the cut.

  The covering sheet 160 and the laminated sheet are joined by heat fusion in the joining area. Details of the bonding area between the cover sheet 160 and the laminated sheet will be described later.

  The cover sheet 160 has a rectangular shape having a larger outline than the outline 1151 of the laminated sheet defining the notch 115. The covering sheet 160 is disposed on the outer surface 110 a side of the exterior body 110, and is disposed outside the first sheet 11. The composite sheet 10 is composed of a single covering sheet 160 at the notch 115.

  The cover sheet 160 can be configured of any non-stretchable sheet or the like that is less likely to stretch in the Y-axis direction than the first sheet 11. As a non-stretchable sheet which comprises the coating sheet 160, a nonwoven fabric, woven fabric, paper etc. can be used, for example. As an example, in order to obtain the same touch as the first sheet 11 to be the outer surface of the exterior body 110, the covering sheet 160 is made of the same non-woven fabric as the non-woven fabric layer 11a of the first sheet 11 before stretching. Can. Here, the same kind of non-woven fabric means non-woven fabrics having the same manufacturing process of non-woven fabric, such as an air through non-woven fabric, a heat roll non-woven fabric, a spunlace non-woven fabric, a spunbond non-woven fabric, and a meltblown non-woven fabric. Details of the first sheet 11 will be described later.

  FIG. 3 is a cross-sectional view of the disposable diaper 100 taken along line III-III of FIG. FIG. 4 is a cross-sectional view of the disposable diaper 100 taken along line IV-IV of FIG. Since the absorber 120 is not disposed at the position shown in FIG. 3, only the exterior body 110 is shown in FIG. On the other hand, since the absorber 120 is arrange | positioned in the position shown in FIG. 4, the exterior body 110 and the absorber 120 are shown by FIG.

  The absorbent body 120 has an absorbent core 121, a core wrap sheet 122, a top sheet 123, and a back sheet 124. The absorbent core 121 is formed of a highly water-absorbent material such as a fiber material. As a fiber material which forms absorptive core 121, disintegrated pulp, a nonwoven fabric, etc. can be used, for example. In addition, the absorbent core 121 may have a configuration in which a fiber material holds a water absorbing polymer.

  The core wrap sheet 122 is configured as a cover member that accommodates the absorbent core 121 so that the fiber material constituting the absorbent core 121 is not separated. The surface sheet 123 is disposed on the upper side in the Z-axis direction (thickness direction) of the absorbent core 121, and constitutes a contact surface that contacts the skin of the wearer. The back sheet 124 is disposed on the lower side in the Z-axis direction of the absorbent core 121, and constitutes an adhesive surface bonded to the exterior body 110 via the adhesive portion 150.

  The core wrap sheet 122 and the top sheet 123 are composed of sheets having high liquid permeability. Therefore, in the absorbent body 120, the liquid contained in the excrement passes through the core wrap sheet 122 and the top sheet 123, and is quickly taken into the absorbent core 121. On the other hand, the back sheet 124 is formed of a sheet having low liquid permeability. Thereby, in the absorber 120, the liquid can be prevented from leaking outside the back sheet 124.

  An exterior body 110 including a waist portion 111 and a crotch portion 112 includes a first sheet 11, a second sheet 12, an adhesive layer 13 for bonding the first sheet 11 and the second sheet 12, and a covering sheet. And 160, and the composite sheet 10 is comprised. The first sheet 11 constituting the composite sheet 10 is disposed outside (the lower side in the Z-axis direction in FIGS. 3 and 4), and the second sheet 12 is disposed inward (the upper side in the Z-axis direction in FIGS. 3 and 4). Be placed. The first sheet 11 is an elastic sheet including an elastic layer, and more specifically, an elastic sheet including an elastic layer and a non-woven layer including the elastic layer. The adhesive layer 13 is composed of a plurality of adhesive parts 131 disposed between the first sheet 11 and the second sheet 12. The adhesive layer 13 is constituted of, for example, a plurality of adhesive portions 131 arranged at equal intervals in the circumferential direction of the cylinder. The detailed configuration of the composite sheet 10 will be described later.

  3 and 4 correspond to a cross-sectional view of the disposable diaper 100 in a state in which the exterior body 110 illustrated in FIG. 2 is extended along the XY plane, the first sheet which is an elastic sheet in these drawings. 11 is illustrated in an expanded state. In a state in which the first sheet 11 is released from the stretched state, the second sheet 12 which is a non-stretchable sheet forms a wrinkle at a portion which is not bonded by the bonding portion 131.

  As shown in FIG. 4, the disposable diaper 100 further includes an adhesive unit 150 disposed between the exterior body 110 and the absorber 120 and joining the exterior body 110 and the absorber 120. Although the structure of the adhesion part 150 can be arbitrarily determined so that the exterior body 110 and the absorber 120 can be joined, it is preferable that it is a structure which does not prevent the air permeability in the disposable diaper 100.

  The adhesive portion 150 has, for example, a planar outer shape of approximately the same size as the absorber 120 in plan view, and has a shape in which a portion corresponding to the notch portion 115 is cut out. That is, in the aspect of disposable diaper 100, adhesion part 150 is not arranged in the field corresponding to notch 115. For the bonding unit 150, an adhesive such as a hot melt adhesive can be used, for example. Moreover, various printing methods, various transfer methods, etc. can be utilized for arrangement | positioning of an adhesive agent, for example. Furthermore, the bonding portion 150 can also be formed of a bonding member other than the adhesive.

  As shown in FIG. 4, the notch 115 is formed in a sheet in a state in which the first sheet 11 and the second sheet 12 are laminated via the adhesive layer 13. As shown in FIG. 2 and FIG. 4, the covering sheet 160 is disposed on the outer surface 110 a side of the exterior body 110 so as to cover the notch 115. In the disposable diaper 100, only the covering sheet 160 exists outside the absorber 120 in the area corresponding to the notch 115. The absorber 120 and the cover sheet 160 are not directly bonded, and the absorber 120 and the cover sheet 160 can be separated.

  As shown in FIG. 4, the waist portion 111 is formed with a hole by the notch portion 115. The cover sheet 160 is bent so that the central portion thereof slightly enters the hole of the waist portion 111, and when the exterior body 110 is viewed from the outer surface 110a side, the area where the notch portion 115 is formed is It has a slightly concave shape. In other words, the cover sheet 160 is disposed on the opposite side of the first sheet (stretchable sheet) 11 to the absorber 120 side, and is bent toward the absorber 120 at the notch 115.

  The thickness b of the region corresponding to the notch 115 on the entire surface of the composite sheet 10 is set to be thinner than the thickness a of the first sheet 11, the second sheet 12, the adhesive layer 13 and the covering sheet 160 overlapping. The thickness of the sheet 160 is equal to or thinner than the thickness of the laminated sheet.

  The thickness of the area of the composite sheet 10 where the covering sheet 160 is not disposed, that is, the thickness of the laminated sheet of the first sheet 11 and the second sheet 12 bonded via the adhesive layer 13 is preferably 0.3 mm. It is preferably 10 mm, more preferably 0.5 mm to 4 mm. The thickness of the covering sheet 160 is preferably 0.1 mm to 10 mm, more preferably 0.2 mm to 4 mm. The thickness a of the laminated sheet and the covering sheet 160 is preferably 0.4 mm to 10 mm, more preferably 0.5 mm to 5 mm. The thickness b of the region corresponding to the notch 115 in the composite sheet 10 is preferably 0.3 mm to 10 mm, and more preferably 0.5 mm to 4 mm. The thickness b is a length from the inner surface of the composite sheet 10 to the outer surface of the covering sheet 160 disposed in the notch 115.

The thickness is determined by the following method after leaving the sheet for 2 days with no load under an environment of 20 ± 2 ° C. and 65 ± 5% RH. First, in the case of a stretch sheet, the sheet is stretched 1.5 times and stretched between flat plates with a load of 0.5 cN / cm ² (in the case of a non-stretch sheet, no stretching process is necessary). The cross section is observed with a microscope at a magnification of 50 to 200 times, the average thickness is determined in each view, and the average thickness of the three views is determined (if the sheet has a high basis weight portion or a high basis weight portion, it is high The basis weight is to be measured).

[Detailed composition of composite sheet]
Hereinafter, the first sheet 11, the second sheet 12, and the adhesive layer 13 which constitute a part of the composite sheet will be described.
(First sheet)
First, the configuration of the first sheet 11 used for the composite sheet 10 will be described. FIG. 5A is a plan view showing the first sheet 11 in an enlarged manner, schematically showing the structure of the first sheet 11. FIG. 5B is a cross-sectional view of the first sheet 11 taken along the line VB-VB in FIG.

  The first sheet 11 has a non-woven fabric layer 11a extending along the XY plane and an elastic filament 11b contained in the non-woven fabric layer 11a. The non-woven fabric layer 11a is formed of a non-woven fabric composed of low-elasticity fibers. The non-woven fabric forming the non-woven fabric layer 11a is not limited to a specific type, and can be selected from, for example, an air through non-woven fabric, a heat roll non-woven fabric, a spunlace non-woven fabric, a spunbond non-woven fabric, and a meltblown non-woven fabric.

  Moreover, the fiber which comprises the nonwoven fabric layer 11a is not limited to a specific kind, For example, it can select from chemical fibers, such as polyethylene, a polypropylene, polyester, a polyamide, etc. Furthermore, the non-woven fabric layer 11a may be composed of a composite fiber including a plurality of types of chemical fibers. In addition, natural fibers such as cotton and silk may be blended with the fibers constituting the non-woven fabric layer 11a.

  The elastic filament 11 b is a thread-like elastic body extending along the Y-axis direction. The elastic filaments 11 b are arranged at intervals in the X-axis direction in the waist portion 111 to constitute an elastic layer of the first sheet 11. The elastic filament 11b can be formed of, for example, an elastic material such as a thermoplastic elastomer or rubber. In particular, the elastic filaments 11 b are preferably formed of a thermoplastic elastomer that easily fuses with the fibers constituting the non-woven fabric layer 11 a.

  As a thermoplastic elastomer which forms elastic filament 11b, a styrene system elastomer, an olefin system elastomer, a polyester system elastomer, a polyurethane system elastomer etc. can be used, for example. The elastic filaments 11 b can also be formed by combining a plurality of types of thermoplastic elastomers. Furthermore, the elastic filaments 11b may be core-sheath or side-by-side bicomponent fibers.

  Further, in the first sheet 11, stretchable portions 11a1 extending in the X-axis direction and connecting portions 11a2 are alternately arranged along the Y-axis direction. In the first sheet 11, the basis weight of the nonwoven fabric layer 11a in the stretchable portion 11a1 is lower than the basis weight of the nonwoven fabric layer 11a in the joining portion 11a2. For this reason, the stretchable portion 11a1 is more easily deformed in the Y-axis direction than the connecting portion 11a2. In the non-woven fabric layer 11a, the strength is secured by the connecting portion 11a2 which is not easily deformed.

  In the stretched state of the first sheet 11 in the waist portion 111, a force for stretching in the Y-axis direction is applied, whereby the stretchable portion 11a1 mainly stretches in the Y-axis direction. That is, the first sheet 11 in the stretched state is not substantially stretched at the connecting portion 11a2. The first sheet 11 in the stretched state may also be stretched in the connecting portion 11a2 as long as the amount thereof is smaller than that of the stretchable portion 11a1.

  The first sheet 11 in the waist portion 111 contracts in the Y-axis direction by the elastic force of the elastic filament 11b when the force for extending the Y-axis direction from the stretched state is released. In the first sheet 11 in the contracted state, the dimension in the Y-axis direction of the stretchable portion 11a1 is smaller than that of the first sheet 11 in the expanded state. Thus, the first sheet 11 is an expandable sheet that can expand and contract in the Y-axis direction.

  As described above, in the composite sheet 10, the first sheet 11 itself can be expanded and contracted by the elastic force of the elastic filament 11b. For this reason, in the composite sheet 10, the waist portion 111 of the exterior body 110 can be expanded and contracted in the trunk circumferential direction in FIG. 1 by using the elasticity of the first sheet 11. Therefore, the composite sheet 10 can be configured without providing an elastic body such as thread rubber between the first sheet 11 and the second sheet 12.

  The first sheet 11 can be manufactured by any manufacturing method. For example, the first sheet 11 can be manufactured using an elastic filament 11 b and two non-woven fabrics. In this manufacturing method, first, a laminated body is formed by sandwiching the molten elastic filament 11b between two non-woven fabrics. Thereby, the non-woven fabric and the elastic filament 11b are fused to form the non-woven fabric layer 11a.

  In the first sheet 11 at this stage, the basis weight of the non-woven fabric layer 11a is constant, and the stretchable portion 11a1 and the connecting portion 11a2 are not formed. In order to form the stretchable portions 11a1 and the connecting portions 11a2 in the first sheet 11, for example, a stretching process can be applied in which only the stretchable portions 11a1 are stretched in the Y-axis direction. As a result, only the basis weight of the stretchable portion 11a1 can be reduced while maintaining the basis weight of the connecting portion 11a2.

  Arbitrary methods can be used for the extending | stretching process for forming the expansion-contraction part 11a1 and the connection part 11a2 in the 1st sheet 11, for example, the roll extension process using two tooth groove rolls which mutually mesh is used be able to. In this roll stretch processing, the first sheet 11 is intermittently stretched by causing the first sheet 11 to be caught between the rotated tooth groove rolls, and the stretchable portions 11a1 and the connecting portions 11a2 are alternately arranged. It is formed.

  In this manufacturing method, the first sheet 11 can be manufactured without using an adhesive. For this reason, in the first sheet 11, the touch of the non-woven fabric layer 11a is not impaired by the adhesive. Further, in the first sheet 11, the touch of the nonwoven fabric layer 11a is not impaired even by the elastic filaments 11b included in the nonwoven fabric layer 11a. For this reason, in the first sheet 11, the soft touch inherent to the non-woven fabric layer 11a can be obtained as it is. Thus, since the first sheet 11 is formed by fusing the non-woven fabric and the elastic filaments 11b sandwiched between the non-woven fabrics, the elastic filaments 11b are not exposed on the surface of the non-woven fabric layer 11a and are contained in the non-woven fabric layer 11a. The first sheet 11 can be expanded and contracted by one sheet.

  Although the 1st sheet 11 which is an elastic sheet containing an above-mentioned elastic layer was a nonwoven fabric layer which includes an elastic fiber (elastic filament) as an elastic layer, it is not limited to this. For example, the first sheet 11 may be an elastic sheet containing an elastic film, and the elastic film constitutes an elastic layer. This elastic film is made of a thermoplastic elastomer or the like and has elasticity in itself. As an elastic sheet using such an elastic film, for example, an elastic sheet formed by laminating an elastic film between two non-woven fabric layers described in JP-A-2017-64361 can be used.

  The elastic layer contained in the non-woven fabric layer of the first sheet 11 may be, for example, an elastic fiber made of short fibers. The elastic filaments are arranged such that the elastic fibers extend in one direction without crossing each other, but in the case of using elastic fibers consisting of short fibers, the elastic fibers may be randomly disposed or any one of them It may be arranged to be oriented in a direction.

  The first sheet 11 may be an elastic sheet made of a non-woven fabric formed by mixing elastic fibers and non-elastic fibers. In this case, in the stretchable sheet, the elastic fiber constitutes an elastic layer, and a part of the elastic fiber is included in the non-woven fabric layer. The first sheet 11, which is an elastic sheet including an elastic layer, is a non-woven layer including an elastic layer formed by stretching a laminate having an elastic filament sandwiched between the two non-woven fabrics described above. Most preferred.

  Even in these configurations, since the non-woven fabric layer 11a can be fused to the elastic layer, the first sheet 11 can be manufactured without using an adhesive.

(Second sheet)
The second sheet 12 that constitutes a part of the composite sheet 10 can be made of any non-stretchable sheet that does not easily stretch in the Y-axis direction. As the non-stretchable sheet constituting the second sheet 12, for example, non-woven fabric, woven fabric, paper or the like can be used. As an example, the second sheet 12 can be made of non-woven fabric using fibers similar to the non-woven fabric layer 11 a of the first sheet 11 in order to obtain the same touch as the first sheet 11.

(Adhesive layer)
The first sheet 11 and the second sheet 12 are bonded by an adhesive layer 13 consisting of a plurality of adhesive portions 131 arranged in a strip shape extending in the X-axis direction at regular intervals in the XY plane between these sheets. Ru. The pattern shape of the adhesive layer 13 is not limited to this.

  The adhesive layer 13 is typically formed of an adhesive. As a method of forming the adhesive layer, for example, various printing methods, various transfer methods, and the like can be used. As a printing method, for example, gravure printing, letterpress printing, offset printing and the like can be used. As the transfer method, for example, roll transfer or thermal transfer can be used. A hot melt adhesive is used as an adhesive for forming the adhesive layer 13. In addition to the hot melt adhesive, the adhesive layer 13 can be formed of various adhesives such as a thermoplastic adhesive and a reactive adhesive. The adhesive layer 13 can also be formed of various adhesive members other than the adhesive. As such an adhesive member, for example, a sheet-like member having adhesiveness on both sides of a double-sided tape or the like can be mentioned.

  The adhesive layer 13 is preferably disposed on the first sheet 11 in the stretched state. The adhesive layer 13 is disposed on the first sheet 11 in the stretched state, and is bonded to the second sheet 12 to form a laminated sheet in which the first sheet 11 and the second sheet 12 are laminated. After forming the notches 115 in the laminated sheet, the covering sheet 160 is disposed so as to cover the notches 115 with the covering sheet 160, and the covering sheet 160 and the laminating sheet are joined to form the composite sheet 10. .

[Detailed configuration of junction area]
FIG. 6 is a partial enlarged plan view of the back side portion 111b of the waist portion 111 of the exterior body 110, and is a view for explaining the state of the bonding area of the covering sheet 160b and the laminated sheet in the composite sheet 10. The state of the bonding area between the covering sheet 160a and the laminated sheet around the notch 115a of the abdominal side 111a is also the same as that in FIG.

  The covering sheet 160 b has a rectangular shape larger than the contour 1151 of the laminated sheet defining the notch 115 b so as to cover the notch 115 b. By making the cover sheet 160b larger than the notch 115b, it is possible to secure the joint region between the two and to reliably cover the notch 115b even if positional deviation occurs when bonding the cover sheet 160b to the laminated sheet. The cover sheet 160b can be disposed on the

  The composite sheet 10 has a bonding area 170 along the contour 1601 of the covering sheet 160 b. In the bonding area 170, the covering sheet 160b and the laminated sheet overlap. The bonding area 170 includes a bonding portion 171 in which the covering sheet 160 b and the laminated sheet are heat-sealed, and a non-bonding non-bonding portion 172 which is not heat-sealed. The laminated sheet and the covering sheet 160 b are joined by heat fusion at the joining portion 171 of the rectangular frame-like joining area 170. The bonding portion 171 can be formed, for example, by heat sealing by heat sealing by heat sealing by heat sealing by embossing using an embossing convex roll and a flat roll.

  The outline of the inner periphery of the frame-like bonding area 170 is slightly larger than the outline 1151 of the laminated sheet defining the notch 115 in plan view. The outline of the outer periphery of the bonding area 170 is positioned slightly smaller than the outline 1601 of the covering sheet 160 b.

  In the bonded region 170, the non-bonded portions 172 are arranged in a checkered pattern not continuous in any direction. Furthermore, the occupancy rate of the bonding portion 171 in the bonding region 170 is 50%.

[Operation and effect of this embodiment]
In the present embodiment, the notch portion 115 is formed in a region where the first sheet (stretchable sheet) 11 constituting the waist portion 111 of the exterior body 110 faces the absorber 120. Furthermore, a covering sheet 160 is disposed so as to cover the notch 115, and the covering sheet 160 is less likely to be expanded and contracted than the first sheet (stretchable sheet) 11. In such a disposable diaper 100, since the notch part 115 is provided, there is no expansion-contraction area in the area | region which the absorber 120 of the waist part 111 opposes. Thereby, the force accompanying the expansion and contraction of the waist portion 111 is less likely to act on the absorber 120, and the deformation of the absorber 120 can be suppressed. As described above, it is difficult for the elastic force of the waist portion 111 to be applied to the absorbent body 120 and for the absorbent body 120 to be more resistant to wrinkles, and therefore the appearance and absorption performance of the disposable diaper are impaired by the wrinkles on the absorbent member 120 It is possible to ensure good appearance and absorption performance.

  Furthermore, in the present embodiment, in the state of the disposable diaper 100, the first sheet (stretchable sheet) 11 is present in the entire waist circumferential direction of the waist portion 111, and the abdominal side portion 111a and the back side Each portion 111 b has a first sheet (stretchable sheet) 11 over the entire Y-axis direction. This improves the fit to the waist of the wearer. Furthermore, the waist portion 111 easily adheres around the waist of the wearer, and leakage of the wearer's excrement from the waist is suppressed.

  Further, in the present embodiment, the composite sheet 10 is configured by the single covering sheet 160 at the notch 115. That is, in the disposable diaper 100, only the covering sheet 160 is present outside the absorber 120 in the region corresponding to the notch 115. Thereby, it is possible to obtain good ventilation and a soft touch.

  Further, in the present embodiment, the covering sheet 160 is disposed on the opposite side of the first sheet (stretchable sheet) 11 to the absorber 120 side, and is bent toward the absorber 120 at the notch 115. Furthermore, the thickness b of the covering sheet 160 is such that the thickness b of the area corresponding to the notch 115 in the composite sheet 10 of the waist portion 111 is thinner than the thickness a of the area where the covering sheet 160 and the laminated sheet overlap. It is the same as or thinner than the thickness of the sheet. Thereby, in the exterior body 110 including the waist portion 111, the variation in thickness is reduced in the surface of the composite sheet 10, so that uniform texture and touch can be obtained in the outer surface 110a of the exterior body 110.

  Further, in the present embodiment, the covering sheet 160 is disposed on the outer surface 110 a side of the exterior body 110, and the covering sheet 160 and the laminated sheet are joined at a joining area 170 provided along the contour 1601 of the covering sheet 160. . As described above, since the bonding area 170 is provided along the contour 1601 of the cover sheet 160, the end of the cover sheet 160 is less likely to be flipped. Accordingly, it is possible to obtain the exterior body 110 having an appearance in which the covering sheet 160 is unlikely to be peeled off from where it is turned up and the covering sheet 160 is integrated with the first sheet 11.

  Further, in the present embodiment, in the bonded region 170 of the composite sheet 10, the non-bonded portions 172 are arranged in a pattern that is not continuous in any direction. As a result, the covering sheet 160 and the laminated sheet of the first sheet 11 and the second sheet 12 are joined without a gap along the joining area 170, so the excrement from the joining area 170 Leakage is suppressed.

  Further, the occupancy ratio of the bonding portion 171 in the bonding region 170 is preferably 40% or more and 60% or less, and is 50% in the present embodiment. By setting the occupancy rate of the bonding portion 171 to the bonding region 170 to 40% or more, sufficient bonding strength can be secured. By setting the occupancy ratio of the bonding portion 171 to the bonding region 170 to 60% or less, a uniform texture can be given to the outer surface of the exterior body 110, and the touch can be improved.

Other Embodiments
Also in the disposable diapers of the following second to sixth embodiments described as the other embodiments, as in the first embodiment, in the first sheet (elastic sheet) constituting the waist portion of the exterior body A notch is formed in the area facing the absorber. Furthermore, a cover sheet is disposed to cover the notch, and the cover sheet is less likely to be expanded and contracted than the first sheet (elastic sheet). In such a disposable diaper, since the force accompanying the expansion and contraction of the waist portion hardly acts on the absorber, it is possible to suppress the deformation of the absorber. As described above, the elastic force of the waist portion is difficult to be added to the absorbent body, and the absorbent body is less likely to be wrinkled, so that the appearance and the absorption performance of the disposable diaper are impaired by the wrinkles on the absorbent body And good appearance and absorption performance can be ensured.

  Moreover, also in the following second to sixth embodiments, as in the first embodiment, in the state of the disposable diaper, the first sheet (elastic sheet) covers the entire waist circumferential direction of the waist portion. The ventral side and the dorsal side have the first sheet (stretchable sheet) over the entire Y-axis direction. This improves the fit to the waist of the wearer. Furthermore, the waist portion easily adheres around the wearer's waist, and leakage of the wearer's excrement from the waist is suppressed.

Moreover, also in the following second to sixth embodiments, as in the first embodiment, the bonding region between the laminated sheet and the covering sheet has a bonding portion and a non-bonding portion. Furthermore, in the junction area
The occupancy rate of the bonding portion is 40% or more and 60% or less, and the non-bonding portion is arranged in a pattern not continuous in any direction. Thereby, the texture and the touch can be made favorable while securing a sufficient bonding strength.

  Hereinafter, although each of the second to sixth embodiments will be described, points different from the first embodiment will be mainly described, and the same configurations are denoted by the same names and reference numerals, and the description will be omitted. There is.

Second Embodiment
In the first embodiment, an example is given in which the heat fusion treatment area to be subjected to the heat fusion treatment for bonding is set in the area where the covering sheet and the lamination sheet overlap. On the other hand, in the second embodiment, an example will be described in which the bonding area and the thermal fusion process area do not match by providing the thermal fusion process area across the outline of the covering sheet.

  FIG. 7 is a view for explaining the state of the bonding area between the cover sheet 160 b and the laminated sheet in the present embodiment. In FIG. 7, the specific bonding pattern in the bonding area is omitted.

  In the present embodiment, as shown in FIG. 7, a heat fusion treatment area 1701 is provided across the contour 1601 of the covering sheet 160. The heat fusion treatment area 1701 is an area to which a heat fusion treatment for bonding is applied. In FIG. 7, the heat-sealed area 1701 is an area surrounded by an alternate long and short dash line, and is indicated by a dot pattern. The heat fusion treatment area 1701 can be divided into a first area located outside on the boundary of the outline 1601 and a second area located inside, with the second area becoming a bonding area 170.

  By providing the heat fusion treatment area 1701 across the contour 1601 of the covering sheet 160, the heat fusion treatment area 1701 has an area where the laminated sheet and the covering sheet overlap and an area of only the covering sheet. The area where the laminated sheet and the covering sheet overlap is the joint area 170 related to the joining of the two, and the area of the covering sheet alone is an area not involved in the joining.

  As shown in FIG. 7, the contour of the inner periphery of the frame-like heat-sealed area 1701 is slightly larger than the contour 1151 of the laminated sheet defining the notch 115 in plan view. The outline of the outer periphery of the heat fusion treatment area 1701 is slightly larger than the outline 1601 of the covering sheet 160, and is positioned to surround the covering sheet 160. The heat fusion treatment area 1701 is placed across the outline 1601 of the covering sheet 160 to provide the joint area 170 along the outline 1601 without spacing from the outline 1601 of the covering sheet 160.

  In the present embodiment, in the heat fusion treatment area 1701, the area where the laminated sheet and the covering sheet overlap is the bonding area 170. In the heat fusion treatment area 1701, a second area located on the inner side of the contour 1601 is a bonding area 170. As described above, the heat fusion treatment area 1701 and the bonding area 170 do not coincide with each other.

  When the heat fusion treatment area 1701 is provided across the area where the laminated sheet and the covering sheet 160 overlap and the area of only the laminated sheet, in the bonding area 170 of the area where the laminated sheet and the covering sheet overlap, It is sufficient that the non-joining portion 172 has a pattern which is not continuous in any direction, and further, the condition that the occupancy of the joining portion 171 in the joining region 170 is 40% or more and 60% or less is satisfied. For example, the pattern formed in the heat fusion treatment area 1701 by the heat fusion treatment may be a checkered pattern as shown in the first embodiment for the portion to be heat treated and the portion not to be heat treated. The portion to be heat-treated is a joint when two sheets overlap each other, and the portion not to be heat-treated is a non-joint when two sheets overlap each other. When the heat fusion treatment area 1701 straddles the outline 1601 of the covering sheet 160 and processing is performed with such a checkered heat treatment pattern, the above-mentioned joining area 170 is the area where the laminated sheet and the covering sheet overlap. It suffices if the conditions in the above are satisfied.

  As described above, in the present embodiment, since the cover sheet 160 is joined in the heat fusion treatment area 1701 across the outline 1601 of the cover sheet 160, the outline 1601 is not spaced from the outline 1601 of the cover sheet 160. A junction region 170 is provided. As a result, the contour 1601 of the covering sheet 160 is less likely to be turned off on the outer surface side of the exterior body 110, and the covering sheet 160 is less likely to be peeled off from the turning up point, and the appearance like the covering sheet 160 is integrated with the first sheet 11 The exterior body 110 can be obtained.

Third Embodiment
In the first embodiment, the cover sheet is disposed on the outer surface side of the outer package, but the cover sheet may be disposed on the inner surface side of the outer package as in the following third embodiment. The present embodiment will be described with reference to FIGS. 8 and 9. The present embodiment is different from the first embodiment in that the arrangement position of the covering sheet is different, the shape of the bonding portion for bonding the absorber and the outer package is different, and the position of the heat fusion treatment area is different. It is different.

  FIG. 8 is a partial cross-sectional view of the disposable diaper 200 according to the present embodiment. FIG. 8 is a partial cross-sectional view of the back side 211 b of the waist portion 211 where the absorbent body 120 is disposed, and the exterior body 210 and the absorbent body 120 are shown. The same configuration is also applied to the ventral side.

  FIG. 9 is a partial enlarged plan view of the back side portion 211b of the waist portion 211 of the exterior body 210 of the disposable diaper 200, and illustrates the position of the bonding area between the covering sheet 260 and the composite sheet 10 around the notch 115b. FIG. In FIG. 9, the heat-sealed area 1701 is an area surrounded by an alternate long and short dash line, and is indicated by a dot pattern. The heat fusion treatment area 1701 can be divided into a first area located outside on the boundary of the contour 1601 and a second area located inside, with the first area becoming a bonding area 170. In FIG. 9, illustration of a specific bonding pattern in the bonding region is omitted.

  The exterior body 210 is composed of a waist portion 211 and a crotch portion 212 formed in series. The external shape of the exterior body 210 is the same as that of the first embodiment. Also in the present embodiment, the waist portion 211 has the stretchable region P. In addition, the waist portion 211 has a facing region Q that faces the absorber 120.

  The exterior body 210 is composed of a composite sheet 280. The composite sheet 280 includes a first sheet 11, a second sheet 12, an adhesive layer 13, and a cover sheet 260. In the laminated sheet of the first sheet 11 and the second sheet 12 laminated via the adhesive layer 13, notches 115 are formed in the facing area Q opposed to the absorber 120 in the waist part 211. The notch 115 is formed in each of the ventral side and the dorsal side of the waist portion 211. The notch 115 is covered by the covering sheet 260.

  The cover sheet 260 is disposed between the laminated sheet including the first sheet (stretchable sheet) 11 and the absorber 120 in the Z-axis direction (thickness direction) of the disposable diaper 200. That is, the covering sheet 260 is disposed on the inner surface 210 b side of the exterior body 210. The bonding portion 250 for bonding the exterior body 210 and the absorber 120 has, for example, a planar outer shape approximately the same size as the absorber 120.

  The cover sheet 260 of the exterior body 210 and the periphery thereof are bonded to the outer surface 120 a side of the absorber 120 by an adhesive unit 250 disposed on the outer surface 120 a side of the absorber 120. For the bonding portion 250, the same material as the bonding material used for the bonding portion 150 described above can be used. Further, also in the formation of the adhesive, it can be arranged using the same method as the above-mentioned adhesion part 150.

  The laminated sheet and the covering sheet 260 are joined by heat fusion at the joining portion of the rectangular frame-like joining area 170. The bonding area 170 is provided along the notch 115 of the laminated sheet. In the present embodiment, a heat fusion treatment area 1701 is provided across the contour 1151 of the notch 115. By providing the heat fusion treatment area 1701 across the contour 1151 of the notch, the heat fusion treatment area 1701 has an area where the laminated sheet and the covering sheet overlap and an area of only the covering sheet. The area where the laminated sheet and the covering sheet overlap is the joint area 170 related to the joining of the two, and the area of the covering sheet alone is an area not involved in the joining.

  As shown in FIG. 9, the inner edge portion of the frame-like heat-sealing processing region 1701 is located inside the cutout portion 115 in plan view. The outer edge of the heat-sealed area 1701 is smaller than the rectangular outline 2601 of the covering sheet 260 and is positioned to surround the outline 1151 of the laminated sheet defining the notch 115. The heat-sealed area 1701 extends along the contour 1151 of the notch 115 without spacing from the contour 1151 by positioning it across the contour 1151 of the laminated sheet defining the notch 115 of the notch 115. A junction region 170 is provided.

  As described above, in the present embodiment, since the cover sheet 260 is joined in the heat fusion treatment area 1701 that straddles the contour 1151 of the laminated sheet defining the notch 115, the exterior body 210 is viewed from the outer surface 210a side. In addition, the bonding area 170 is provided along the contour 1151 without spacing from the contour 1151 of the laminated sheet defining the notch 115. Thereby, in the outer surface 210a of the exterior body 210, a gap is hardly generated between the covering sheet 260 and the laminated sheet, and the exterior body 210 having an appearance in which the covering sheet 160 is integrated with the first sheet 11 can be obtained. .

  As described above, the heat fusion treatment area 1701 has an area where the covering sheet 160 and the laminated sheet overlap, and an area where only the laminated sheet exists. In such a configuration, the area where the cover sheet 160 and the laminated sheet overlap is the joint area 170 where the cover sheet 160 and the laminated sheet are joined, and the heat fusion treatment area and the joint area 170 do not coincide. The bonding area 170 is provided along the notch 115 of the laminated sheet.

  Also in the present embodiment, as in the second embodiment, when the heat fusion treatment area 1701 and the bonding area 170 do not coincide, non-bonding is performed in the bonding area 170 of the area where the laminated sheet and the covering sheet overlap. The portion 172 may be a pattern that is not continuous in any direction, and the occupancy rate of the bonding portion 171 in the bonding region 170 may be 40% or more and 60% or less.

  In the present embodiment, an example in which the heat fusion treatment area 1701 straddles the notch 115 is given, but as in the first embodiment, the heat fusion treatment area is formed in the area where the laminated sheet and the cover sheet overlap. It may join so that it may be located. In this case, the heat fusion treatment area and the bonding area coincide with each other.

  Further, the composite sheet 280 of the present embodiment is configured of a single covering sheet 260 at the notch 115. That is, in the disposable diaper 200, only the bonding portion 250 and the covering sheet 260 exist outside the absorber 120 in the region corresponding to the notch portion 115. Thereby, compared with the case where the notch part 115 is not formed, the opposing area | region Q has a good breathability, and can obtain a soft touch.

Fourth Embodiment
In each of the embodiments described above, two notches are provided in each of the ventral side and the dorsal side, but this is not a limitation. As in the following fourth embodiment, one notch may be provided in the region corresponding to the absorber of the outer package including the waist portion and the crotch. Hereinafter, the present embodiment will be described with reference to FIG. The present embodiment is mainly different from the first embodiment in that the shape and the number of the notches are different, and the shape of the covering sheet is different.

  FIG. 10 is a developed plan view of the disposable diaper 300 according to the present embodiment, as viewed from the outer surface 310 a side of the exterior body 310. The disposable diaper 300 includes an exterior body 310 and an absorber 120. The exterior body 310 constitutes the exterior of the disposable diaper 300. The absorber 120 is held inside the exterior body 310. That is, the exterior body 310 is disposed on the outer surface 120 a side of the absorber 120.

  The exterior body 310 is composed of a waist portion 311 and a crotch portion 312 formed in series by a composite sheet. The waist portion 311 has a belly side 311a disposed on the front side in the X-axis direction (front-rear direction) and a back side 311b disposed on the rear side in the X-axis direction (front-rear direction). The ventral side 311a and the back side 311b are joined, for example, by heat sealing or ultrasonic sealing at side seals 313 provided at both ends in the Y-axis direction.

  The exterior body 310 has a stretchable region P. In the stretchable region P, the exterior body 310 has stretchability in the Y-axis direction. The waist portion 311 which is required to be stretchable in the circumferential direction of the body has a stretchable region P. In addition, in the crotch region 312, the exterior body 310 has a stretchable region P. The waist portion 311 and the crotch portion 312 of the exterior body 310 have a facing region Q facing the absorber 120. As shown in FIG. 10, the opposing region Q and the stretchable region P partially overlap each other in plan view.

  The exterior body 310 is composed of a composite sheet 380. The composite sheet 380 includes a first sheet 11 which is an elastic sheet, a second sheet, an adhesive layer, and a cover sheet 360. In the laminated sheet in which the first sheet 11 and the second sheet are laminated via the adhesive layer, a notch 315 is formed in the facing area Q facing the absorber 120. The cutaway portion 315 is formed in series over the ventral side 311a, the crotch portion 312, and the dorsal side 311b. The covering sheet 360 is disposed from the ventral side 311 a through the crotch portion 312 to the dorsal side 311 b and covers the notch 315.

  In the present embodiment, an example is given in which the covering sheet 360 is disposed on the outer surface 310a side of the exterior body 310, but as in the second embodiment, the covering sheet 360 is disposed between the first sheet and the absorber in the thickness direction. , May be disposed on the inner surface side of the exterior body. The width of the notch 315 in the Y-axis direction is narrower than that of the absorber 120, and the total length in the X-axis direction is substantially the same as that of the absorber 120. The absorber 120 and the exterior body 310 are adhered by an adhesive portion formed of an adhesive or the like, and this adhesion portion is, for example, an area where the exterior body 310 and the absorber 120 overlap in plan view. Thus, the notch portion 315 is not provided. Specifically, the bonding portion can be formed in a strip shape extending in the X-axis direction at both end portions in the width direction of the absorber 120.

  As described above, one notch 315 may be formed over the region of the laminated sheet facing the absorber 120, and it is manufactured as compared with the case where two notches of the above embodiment are formed. Cheap.

  Further, in the present embodiment, since the notched portion 315 is also provided in the facing region Q of the stretchable crotch portion 312 facing the absorber 120, the crotch portion 312 is also similar to the waist portion 311. The force accompanying the expansion and contraction of the crotch portion 312 hardly acts on the absorber 120. Therefore, in the present embodiment, the force accompanying the expansion and contraction of the exterior body 310 is less likely to act on the absorber 120, and the deformation of the absorber 120 can be suppressed.

  Moreover, also in this embodiment, in the disposable diaper 300, only the covering sheet 360 exists in the outer side of the absorber 120 in the area | region corresponding to the notch part 315 like 1st Embodiment. Thereby, it is possible to obtain good ventilation and a soft touch.

Fifth Embodiment
Although each disposable diaper in the above-mentioned embodiment was an integral type in which all the exterior bodies were formed using the composite sheet in which the waist part and crotch part were formed in a series, it is not limited to this. As in the present embodiment, it may be a split type exterior body formed by bonding a ventral side panel, a crotch panel and a back side panel which are divided as separate members. This will be described below with reference to FIGS. 11 and 12.

  FIG. 11 is a plan view showing the unfolded state of the disposable diaper 400 according to the present embodiment. FIG. 12 is a plan view of a ventral panel 411 a and a dorsal panel 411 b of the disposable diaper 400. The ventral panel 411a and the back panel 411b have a mutually congruent planar shape.

  The disposable diaper 400 which concerns on this embodiment is equipped with the exterior body 410 of the structure different from the exterior body 110 of the disposable diaper 100 which concerns on 1st Embodiment. The exterior body 410 of the disposable diaper 400 is composed of a waist panel 411 and a crotch panel 412 formed as separate members. The waist panel 411 is a waist portion disposed around the waist of the wearer, and includes a ventral side panel 411a as a ventral side and a back side panel 411b as a back side. The ventral-side panel 411a and the back-side panel 411b are both strip-shaped extending in the Y-axis direction, and are spaced apart in the X-axis direction.

  The crotch panel 412 is a crotch disposed under the wearer's crotch. The crotch panel 412 is a strip extending in the X-axis direction, and is bridged and positioned between the ventral panel 411 a and the dorsal panel 411 b. The crotch panel 412 is bonded in a region where one end is overlapped with the ventral panel 411 a and the other end is overlapped with the back panel 411 b. The ventral-side panel 411 a and the back-side panel 411 b are joined at side seal portions 413 provided at both ends in the Y-axis direction.

  An absorber 120 is disposed on the crotch panel 412. The absorbent body 120 extends to a region of the crotch panel 412 overlapping the waist panel 411. The waist panel 411 is composed of a composite sheet 480 having a first sheet (stretchable sheet) 11, a second sheet, an adhesive layer, and a cover sheet 4122.

  The covering sheet 4122 is a part of the crotch panel 412, and the crotch panel 412 doubles as a covering sheet that covers a notch 415 described later. A front end portion and a rear end portion of the band-like crotch panel 412 form a cover sheet 4122 which covers the notches 415a and 415b.

  The crotch panel 412 is not limited to the laminated sheet in which the first sheet 11 and the second sheet are laminated, and may be formed of any stretchable sheet or non-stretchable sheet. When the crotch panel 412 doubles as a covering sheet, a sheet that is more difficult to expand and contract than the first sheet 11 can be used as the crotch panel 412.

  The waist panel 411 which concerns on this embodiment has the expansion-contraction area | region P which can be expanded-contracted to a Y-axis direction similarly to the waist part 111 of the exterior body 110 which concerns on 1st Embodiment. The waist panel 411 of the exterior body 410 has a facing area Q facing the absorber 120. In the facing area Q where the waist panel 411 faces the absorber 120, a notch 415 is formed. As shown in FIG. 11, when viewed in plan, the facing area Q and the stretchable area P partially overlap each other. As shown in FIG. 12, the ventral-side panel 411a (back-side panel 411b) has a U-shaped planar outer shape. In the ventral panel 411 a (the back panel 411 b), the notch 415 a (415 b) has a U-shaped outline 4151.

  In the present embodiment, in the exterior body 410, the crotch panel 412 is disposed outside the waist panel 411. The joint area where the crotch panel 412 and the waist panel 411 which also serve as the cover sheet are joined is provided along the contour 4121 of the cover sheet 4122 which is a part of the crotch panel 412. The shape of the junction area has a U-shape. The cover sheet 4122 and the waist panel 411 are joined by heat fusion. In addition, in the exterior body 410, the crotch panel 412 may be disposed inside the waist panel 411.

  In this embodiment, although the example in which the crotch panel also served as the covering sheet has been described, the present invention is not limited to this. The waist panel and the crotch panel may be adhered to form an exterior body, a region of the exterior body facing the absorbent body of the waist panel may be cut out, and a covering sheet may be separately provided to cover the cutout portion. When the crotch panel doubles as the cover sheet, the number of parts can be reduced as compared with the case where the cover sheet is separately provided.

Sixth Embodiment
In the first embodiment, the non-bonded portion 172 in the bonded region 170 has a checkered pattern arranged in a pattern not continuous in any direction, but the present invention is not limited to this pattern. Hereinafter, modifications of other patterns will be described as a sixth embodiment.

  FIG. 13: (A), (B) is a partial enlarged plan view explaining the modification of the pattern of the non-joining part in the joining area | region of the composite sheet of the disposable diaper which concerns on this embodiment, respectively. Also in the modification of the pattern shown in FIG. 13, the bonding area includes the non-bonding part and the bonding part, and the non-bonding part is arranged in a pattern not continuous in any direction, and the occupancy of the bonding part in the bonding area is By setting it to 40% or more and 60% or less, the same effect as that of the first embodiment can be obtained.

  In the first embodiment, the non-joined portions 172 are arranged in a checkered pattern in two rows in the width direction of the joined region 170, but as shown in FIG. 13A, the width direction of the joined region 170 It may be a pattern in which non-joined portions are arranged in a checkered pattern in three rows. Moreover, in 1st Embodiment, it was a pattern of the shape which the adjacent junction part 171 contacted by point. On the other hand, as shown in FIG. 13B, it may be a pattern in which the sides of adjacent rectangular junctions 171 partially overlap each other.

Further Embodiment
As mentioned above, although embodiment of this invention was described, this invention is not limited only to the above-mentioned embodiment, Of course in the range which does not deviate from the summary of this invention, a various change can be added.

  For example, in each of the embodiments described above, the first sheet (stretchable sheet) is used so that both the ventral side and the dorsal side of the waist portion have the stretchable region P, but the ventral side or the dorsal side The first sheet (stretchable sheet) may be used so that at least one of the two has the stretchable region P. If only the dorsal side (ventral side) of the waist portion is stretchable in the circumferential direction along the width direction, the absorbent body of the composite sheet of the dorsal side (ventral side) is cut in the opposite region The notch is provided, and the ventral side (back side) has no notch. In addition, only one covering sheet is provided so as to cover a notch provided on the dorsal side (ventral side). Since there is no elasticity in the ventral side (dorsal side), the elasticity of the ventral side (dorsal side) acts on the region of the absorber opposite to the ventral side (dorsal side) Since no wrinkles occur, the notch is not necessary. Even in such a configuration, it is possible to ensure good appearance and absorption performance without the appearance and absorption performance of the disposable diaper being impaired due to wrinkles in the absorber. Furthermore, since the waist has elasticity at the dorsal side (ventral side), the fit of the wearer's dorsal side (ventral side) around the waist is improved, and from the back of the waist (abdomen) Leakage of the wearer's excrement is suppressed.

  In addition, a laminated sheet in which a first sheet (stretchable sheet) and a second sheet (non-stretchable sheet) are laminated is used for the waist portion of the exterior body of each embodiment described above, and when applied to a disposable diaper In addition, although the first sheet, which is a stretchable sheet, is disposed on the outer surface side and the second sheet is disposed on the inner surface side, the present invention is not limited thereto. For example, when it applies to a disposable diaper, the 1st sheet which is an elastic sheet may be arranged at the inner surface side, and the 2nd sheet may be arranged at the outer surface side. In other words, the second sheet may be provided to face the outside of the first sheet (stretchable sheet). Even in such a configuration, similar to the above-described embodiment, the appearance and the absorption performance of the disposable diaper are not impaired by the wrinkles in the absorber, and a good appearance and the absorption performance can be ensured. . Furthermore, since the waist portion is stretchable in the entire waist direction, the fit to the waist of the wearer is improved, and leakage of the wearer's excrement from the waist is suppressed.

  When the non-stretchable second sheet is disposed on the outer surface side, it is desirable that the covering sheet be a non-woven fabric of the same type as the second sheet. The coated sheet is exposed to the outer surface when formed into a disposable diaper, so by using a non-woven fabric of the same type as the second sheet disposed on the outer surface side for the coated sheet, uniform texture and feel are obtained over the entire outer surface of the outer package. It can be done. Here, the same kind of non-woven fabric means non-woven fabrics having the same manufacturing process of non-woven fabric, such as an air through non-woven fabric, a heat roll non-woven fabric, a spunlace non-woven fabric, a spunbond non-woven fabric, and a meltblown non-woven fabric.

  Moreover, in each above-mentioned embodiment, the composite sheet which consists of a lamination sheet which laminated | stacked the 1st sheet | seat which has elasticity, and a 2nd sheet | seat, and a coating sheet was used for the exterior body. On the other hand, without providing the second sheet, the outer package may be formed of a composite sheet of the stretchable first sheet and the covering sheet.

  Further, in each of the above-described embodiments, a composite sheet having a first sheet and a second sheet laminated sheet in which the notch portion is formed, and a cover sheet covering the notch portion is used for the outer package. It was. On the other hand, a laminated sheet in which a first sheet (stretchable sheet) in which the notch portion is formed and a second sheet in which the notch portion is not formed may be used as the outer package. In this case, the second sheet may also serve as a cover sheet covering the notch, or a cover sheet covering the notch may be separately provided.

  The pants-type absorbent article according to the present invention may not be a pants-type disposable diaper formed in a pants shape in advance by being joined at the side seal portion as in the above-described embodiment. That is, the pants-type absorbent article according to the present invention is a tape-type disposable diaper in which a tape such as a surface fastener is provided instead of the side seal portion, and the tape is pasted together when worn. It is also good.

  Furthermore, the pants-type absorbent article according to the present invention may not be a disposable diaper for infants, and may be, for example, a disposable diaper for adults or children. Furthermore, the pants-type absorbent article according to the present invention may not be a disposable diaper as long as it is an absorbent article of a type worn on the lower body. Examples of such a pants-type absorbent article include a pants-type sanitary napkin and a pants-type urine leak pad.

Further, in the fifth embodiment, as shown in FIG. 12, the embodiment has been described in which the notch portion 415a (415b) is formed in part of the peripheral portion of the waist panel 411a (411b). A hole-shaped notch which is cut out may be formed. This will be described below with reference to FIG.
As shown in FIGS. 14 (A) and 14 (B), a hole 30 is formed by cutting out the inside of the waist panel by providing the connecting portion 30 straddling the area where the notch 415 is formed in the width direction (Y axis direction). The notch of the is formed. In addition, although the planar shape of a notch part mentions the example which is a rectangle, it is not limited to this.
In FIG. 14, a region surrounded by a thick broken line corresponds to the region of the notch 415 in the fifth embodiment. A reference numeral 39 is given to a center line which bisects the area of the notch 415 in the X-axis direction.

  As in the waist panel 41 shown in FIG. 14A, the connecting portion 30 has a linear shape, straddles a part of the area of the notch 415 in the width direction, and extends along the width direction. The connection portion 30 is provided along one side of the waist panel 41 having a rectangular outer shape. By providing the connecting portion 30, the waist panel 41 has a frame shape in which the inside of the waist panel 41 is cut out in a rectangular shape. Both side portions 41 a and 41 b positioned on both sides in the width direction of the notch 415 are connected to each other through the connecting portion 30 via an area where the notch 415 is formed in the waist panel 41.

  As in the waist panel 42 shown in FIG. 14B, the connecting portion 30 has a linear shape, extends along the center line 39, and straddles a part of the area of the notch 415 in the width direction. By providing the connecting portion 30, a rectangular cutout portion in a rectangular shape is formed in the inside of the waist panel. Both side portions 42 a and 42 b positioned on both sides in the width direction of the cutout portion 415 are connected to each other through the connecting portion 30 via an area where the cutout portion 415 is formed in the waist panel 42.

  Since both side portions 41a and 41b (42a and 42b) of the waist panel 41 (42) are connected via the connecting portion 30, the movement of the both side portions 41a and 41b (42a and 42b) is restricted, and the waist panel The deflection in the width direction of 41 (42) is suppressed.

Similarly, the connecting portion may be provided in the area of the notch portion provided in the laminated sheet which constitutes a part of the integral type exterior body shown in the first embodiment. As a result, a plurality of hole-like notches cut out from the inside of the laminated sheet are formed on at least one of the back side and the ventral side of the laminated sheet. This will be described below with reference to FIG.
In FIG. 15, the area surrounded by the thick broken line corresponds to the area where the notches 115 (115a and 115b) in the first embodiment are formed. A reference numeral 39 is given to a center line which bisects the area of the notch 115 in the X-axis direction. The exterior body 43 has a waist portion 44. The waist portion 44 has a ventral side 44a and a dorsal side 44b.

As in the laminated sheet constituting a part of the exterior body 43 shown in FIG. 15, the connecting portion 30 has a linear shape, extends along the center line 39, and a part of the area of the notch 115 Cross in the width direction. In each of the ventral side portion 44a and the back side portion 44b, in the area of the notch portion 115, two planar rectangular hole-like notch portions are formed by the connecting portion 30.
Thus, by providing the connecting portion 30, as in the embodiment shown in FIG. 14, both sides in the width direction of the notched portion 115 are interposed between the regions of the waist portion 44 where the notched portions 115 are formed. The movement of the two side portions located on the side is restricted by the connecting portion 30, and bending in the width direction is suppressed.

  The position and shape of the connecting portion 30 described above are not limited to the form shown in FIGS. 14 and 15, and may be, for example, the form shown in each of FIGS. 16 (A) to 16 (E). Or bending of the width direction of a waist part is controlled. In each drawing of FIG. 16, the crotch is located on the lower side in the drawing.

As shown in FIG. 16A, the connecting portion 30 may be provided closer to the crotch than the center line 39.
As shown to FIG. 16 (B), several connection part 30 may be provided.
As shown in FIG. 16C, in addition to the linear connection portion 30 along the width direction, the connection portion 30 is connected to the connection portion 30 and is connected to straddle a part of the area of the notch 115 (415) in the front-rear direction The part 35 may be provided.
The connection portion 30 is not limited to a linear shape, and may be, for example, a curved connection portion 36 straddling a part of the area of the notch portion 115 (415) in the width direction as shown in FIG. .
As shown in FIG. 16 (E), in addition to the linear connecting portion 30 along the width direction, it is connected to the connecting portion 30 and diagonally extending the region of the rectangular notch 115 (415) in a diagonal manner The connection portion 37 may be provided.

  Regarding the above-mentioned embodiment, the present invention further discloses the following absorbent article.

<1> An absorber located in the crotch,
A waist portion having a ventral side and a dorsal side located on the trunk, wherein at least one of the ventral side and the dorsal side is formed of a composite sheet;
And a crotch portion located between the ventral side and the dorsal side and holding the absorber together with the ventral side and the dorsal side,
The composite sheet is a stretchable sheet including an elastic layer, in which a notch is formed in a region facing the absorber, and a pants having a cover sheet that is more difficult to stretch and stretch than the stretchable sheet and covers the notch. Type absorbent article.
<2> The pants-type absorbent article according to <1>, wherein
A pants-type absorbent article, wherein a thickness of a region corresponding to the notch in the composite sheet is the same as or thinner than a thickness of a region where the stretch sheet of the composite sheet and the covering sheet overlap.
<3> The pants-type absorbent article according to <1> or <2>,
The said composite sheet is comprised with the single said coating sheet in the said notch part. The underpants-type absorbent article.
<4> The pants-type absorbent article according to any one of <1> to <3>,
The said covering sheet is arrange | positioned between the said absorber and the said elastic sheet. The underpants-type absorbent article.
<5> The pants-type absorbent article according to any one of <1> to <3>,
The covering sheet is disposed on the outer surface side of the waist portion.
<6> The pants-type absorbent article according to any one of <1> to <5>,
The ventral side, the dorsal side, and the crotch are formed in series by the composite sheet, and the notch is in series across the ventral side, the dorsal side, and the crotch. Pant-type absorbent article being formed.
<7> The pants-type absorbent article according to any one of <1> to <6>,
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are bonded at a bonding area by heat fusion.
<8> The pants-type absorbent article according to <4>,
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are joined by heat fusion in a joining area along the contour without leaving a space from the contour of the stretchable sheet defining the notch.
<9> The pants-type absorbent article according to <5>,
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are joined by heat fusion in a joint area disposed along the outline without spacing from the outline of the covering sheet.
<10> The pants-type absorbent article according to any one of <7> to <9>,
In the bonding area, a plurality of non-joining portions which are arranged in a pattern not continuous in any direction and the stretchable sheet and the cover sheet are not heat-sealed together, the stretchable sheet and the cover sheet are thermally A pant-type absorbent article comprising a joint to be fused, wherein an occupancy of the joint in the joint region is 40% or more and 60% or less.
<11> The pants-type absorbent article according to any one of <1> to <10>,
The composite sheet further includes a sheet facing the inside of the stretchable sheet.
<12> The pants-type absorbent article according to any one of <1> to <11>,
The composite sheet further includes a sheet facing the inside or the outside of the stretch sheet, and the stretch sheet, the sheet disposed on the outside of the composite sheet among the facing sheets, and the covering sheet are non-woven fabrics of the same type. There is a pants-type absorbent article.
<13> The pants-type absorbent article according to any one of <1> to <12>,
The composite sheet further includes a sheet facing the inside or the outside of the stretchable sheet, and the cutout portion is formed in a laminated sheet including the stretchable sheet and the facing sheet.
<14> The pants-type absorbent article according to any one of <1> to <13>,
The outline of the said elastic sheet which defines the said notch is a rectangular shape, and the length in the circumferential direction of the said trunk of the said notch is shorter than the said absorber. A pants type absorbent article.
<15> The pants-type absorbent article according to <14>.
When viewed in a plan view, one side of the rectangular outline of the stretch sheet defining the notch overlaps one end of the absorber, and the remaining three sides are located within the presence area of the absorber. Type absorbent article.
<16> The pants-type absorbent article according to any one of <1> to <15>,
A pant type absorbent article, wherein the notch portion is formed on the composite sheet without reaching the peripheral edge of the waist opening of the waist portion and leaving the peripheral edge.
<17> The pants-type absorbent article according to any one of <1> to <16>,
The pants type absorbent article in which only the covering sheet exists outside the absorber in a region corresponding to the notch portion of the composite sheet.
<18> The pants-type absorbent article according to any one of <1> to <17>,
The pants-type absorbent article, wherein the covering sheet is disposed on the side opposite to the absorbent body side of the stretchable sheet, and is bent toward the absorbent body at the notch portion.
<19> The pants-type absorbent article according to any one of <1> to <18>,
The elastic layer is an elastic filament.
<20> The pants-type absorbent article according to any one of <1> to <19>,
The stretchable sheet extends in the front-rear direction orthogonal to the circumferential direction of the trunk, and has stretchable portions and link portions alternately arranged along the front-rear direction, and the basis weight of the non-woven fabric layer in the stretchable portion A pants-type absorbent article, wherein the amount is lower than the basis weight of the non-woven fabric layer at the joining portion.
<21> The pants-type absorbent article according to any one of <1> to <20>,
The composite sheet further includes a sheet facing the inside or the outside of the stretch sheet, and the facing sheet is a non-woven fabric using fibers similar to the non-woven fabric layer forming the stretch sheet.
<22> The pants-type absorbent article according to any one of <1> to <21>,
The pants-type absorbent article, wherein the covering sheet has a shape larger than the outline of the stretchable sheet that defines the notch.
<23> The pants-type absorbent article according to any one of <1> to <22>,
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are joined by heat fusion treatment in a heat fusion treatment area provided across the contour of the covering sheet.
<24> The pants-type absorbent article according to <6>,
The pants-type absorbent article, wherein the covering sheet is disposed from the ventral side to the crotch and across the dorsal side, and covers the notch.
<25> The pants-type absorbent article according to any one of <1> to <5>,
The pants-type absorbent article, wherein the ventral side, the dorsal side, and the crotch are formed of separate members, and the crotch is bonded to the ventral side and the dorsal side.
<26>
It is a pants type absorbent article according to any one of the above <1> to <5>,
The ventral side, the dorsal side, and the crotch portion are formed in series by the composite sheet, and the notches are provided in areas of the ventral side and the dorsal side facing the absorber, respectively. Pants-type absorbent articles formed one by one.
<27>
It is a pants type absorbent article as described in said <2>,
The thickness of the area corresponding to the notch in the composite sheet is 0.3 mm or more and 10 mm or less, preferably 0.5 mm or more and 4 mm or less, and the stretch sheet of the composite sheet and the cover sheet overlap The thickness of the area is 0.4 mm or more and 10 mm or less, preferably 0.5 mm or more and 4 mm or less.
<28>
It is a pants type absorbent article according to any one of the above <1> to <27>,
The stretchable sheet has a non-woven fabric layer including the elastic layer.
<29>
It is a pants type absorbent article given in the above <28>,
The elastic layer is an elastic filament.

10, 280, 380, 480 ... composite sheet 11 ... first sheet (stretchable sheet)
12 ... 2nd sheet 100, 200, 300, 400 ... disposable diaper (pants type absorbent article)
110a, 310a, 410a ... the outer surface (outer surface) of the exterior body
111, 211, 311, 411 ... waist part 111a, 311a ... belly side part 111b, 211b, 311b ... back side part 112, 212, 312 ... crotch part 115, 315, 415 ... notch part 120 ... absorber 120a ... absorption Outer surface 160 of the body, 260, 360 ... covering sheet 170 ... junction area 411 ... waist panel (waist part)
411a ... ventral panel (ventral side)
411b ... back side panel (back side)
412 ... crotch panel (crotch)
1151, 3151, 4151... Contour 1601 of the laminated sheet defining the notch 115. 3601, 4601 .. outline of the covering sheet 4121 .. outline of the covering sheet 4122.

Claims (12)

An absorbent body located in the crotch,
A waist portion having a ventral side and a dorsal side located on the trunk, wherein at least one of the ventral side and the dorsal side is formed of a composite sheet;
And a crotch portion located between the ventral side and the dorsal side and holding the absorber together with the ventral side and the dorsal side,
The composite sheet is
An elastic sheet including an elastic layer, in which notches are formed in a region facing the absorber;
A covering sheet which is more difficult to stretch than the stretch sheet and covers the notch; The pants-type absorbent article according to claim 1, wherein
A pants-type absorbent article, wherein a thickness of a region corresponding to the notch in the composite sheet is the same as or thinner than a thickness of a region where the stretch sheet of the composite sheet and the covering sheet overlap. The pants-type absorbent article according to claim 1 or 2, wherein
The said composite sheet is comprised with the single said coating sheet in the said notch part. The underpants-type absorbent article. The pants-type absorbent article according to any one of claims 1 to 3,
The said covering sheet is arrange | positioned between the said absorber and the said elastic sheet. The underpants-type absorbent article. The pants-type absorbent article according to any one of claims 1 to 3,
The covering sheet is disposed on the outer surface side of the waist portion. The pants-type absorbent article according to any one of claims 1 to 5, wherein
The ventral side, the dorsal side, and the crotch are formed in series by the composite sheet,
The pant-type absorbent article, wherein the cutaway portion is formed in series across the ventral side, the dorsal side, and the crotch. The pants-type absorbent article according to any one of claims 1 to 6, wherein
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are bonded at a bonding area by heat fusion. The pants-type absorbent article according to claim 4, wherein
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are joined by heat fusion in a joining area along the contour without leaving a space from the contour of the stretchable sheet defining the notch. The pants-type absorbent article according to claim 5, wherein
The pants-type absorbent article, wherein the covering sheet and the stretchable sheet are joined by heat fusion in a joint area disposed along the outline without spacing from the outline of the covering sheet. The pants-type absorbent article according to any one of claims 7 to 9, wherein
In the bonding area, a plurality of non-joining portions which are arranged in a pattern not continuous in any direction and the stretchable sheet and the cover sheet are not heat-sealed together, the stretchable sheet and the cover sheet are thermally A welded joint is provided,
The underpants-type absorbent article whose occupancy of the said junction part in the said joining area | region is 40% or more and 60% or less. The pants-type absorbent article according to any one of claims 1 to 10, wherein
The composite sheet further includes a sheet facing the inside of the stretchable sheet. The pants-type absorbent article according to any one of claims 1 to 11, wherein
The composite sheet further includes a sheet facing the inside or the outside of the stretchable sheet,
The sheet | seat arrange | positioned on the outer side of the said composite sheet among the said elastic sheet and the said opposing sheet | seat, and the said coating sheet are non-woven fabrics of the same kind.

Images