WO2023189320A1

WO2023189320A1 - Absorbent article

Info

Publication number: WO2023189320A1
Application number: PCT/JP2023/008801
Authority: WO
Inventors: 英悟安藤; 拓也幸田; 岳志鈴木
Original assignee: 花王株式会社
Priority date: 2022-03-30
Filing date: 2023-03-08
Publication date: 2023-10-05

Abstract

An absorbent article (1) comprises a front sheet (2), a back sheet (3), and an absorbent body (4), has the longitudinal direction (X) and the width direction (Y), and has an abdominal region, a crotch region, and a dorsal region along the longitudinal direction (X). The absorbent article (1) has a ratio of a deformation amount in the plane direction to a deformation amount in the thickness direction of greater than or equal to 0.45 in the crotch region. The absorbent article (1) preferably has a plurality of bonding regions (7) each including two constituent components adjacent in the thickness direction (Z) bonded together and extending in the longitudinal direction (X), and non-bonding regions (8) each located between bonding regions (7), (7) adjacent in the width direction (Y) and extending in the longitudinal direction (X). When the absorbent article (1) is in an unfolded and maximum stretched state, the non-bonding regions (8) preferably have a ratio of the maximum length in the width direction (Y) to the minimum length L0 of the absorbent article in the width direction of greater than or equal to 0.2.

Description

absorbent articles

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers and sanitary napkins generally have a top sheet placed relatively close to the wearer's skin and a back sheet placed relatively far from the wearer's skin. It is configured to include a sheet and a liquid-retaining absorbent body disposed between both sheets. Since such absorbent articles are used in contact with the wearer's skin, improvements in flexibility and texture are required.

The applicant proposed a nonwoven fabric that has excellent conformability to the skin surface and an absorbent article containing the same (Patent Document 1).

Furthermore, in Patent Document 2, in order to prevent formation of three-dimensional gathers caused by seepage of adhesive from the top sheet, the top sheet is placed at a position overlapping both the leakage preventive part and the absorbent body in the thickness direction. An absorbent article is disclosed in which the sheet is configured to have a non-bonded region where the sheet is not bonded to the absorbent body by an adhesive.

US2020/0054501A1 AU2014282567A1

The present invention relates to absorbent articles.
In one embodiment, the absorbent article includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and It is preferable to have a longitudinal direction corresponding to the front-back direction passing through and a width direction perpendicular to the longitudinal direction, and to have a ventral region, a crotch region, and a dorsal region along the longitudinal direction.
In one embodiment, the absorbent article is in an expanded state and a maximum extension state, and is under a load of 6.8 kPa with the member constituting the non-skin facing surface and the artificial leather in contact with each other in the crotch region. The artificial leather is moved in the planar direction at a tensile speed of 50 mm/min, and the moving distance (mm) when the measured tensile load becomes 2.6 kPa is defined as the amount of deformation in the planar direction,
The crotch region of the absorbent article was compressed in the thickness direction under the conditions that the compression speed was 0.1 cm/sec and the maximum compression load was 68 g/cm ² in the expanded state and maximum elongation state of the absorbent article. It is preferable that the ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction is 0.45 or more, when the maximum amount of deformation (mm) measured at the time is taken as the amount of deformation in the thickness direction.

FIG. 1 is a cross-sectional view schematically showing a cross section along the width direction of the crotch region in an embodiment of the absorbent article of the present invention. FIGS. 2(a) to 2(e) are all plan views schematically showing one embodiment of a bonded region and a non-bonded region formed between two component members. FIG. 3 is a cross-sectional view schematically showing a cross section along the width direction of the crotch region in another embodiment of the absorbent article of the present invention. FIG. 4 is a schematic cross-sectional view of an absorbent sheet that may be included as one embodiment of an absorbent core.

Detailed description of the invention

Since the technology described in Patent Document 1 only increases conformability to the skin surface by the structure of the nonwoven fabric, there is room for improvement in improving the flexibility and texture of the absorbent article as a whole. Moreover, the technique described in Patent Document 2 does not consider improving the flexibility and texture of the entire absorbent article. In addition, if the absorbent article is designed to be thin, such as by using a sheet-type absorber that is thinner than a stacked-type absorber, it is difficult to ensure enough deformation in the thickness direction, so it is also flexible in this respect. There was room for improvement in improving the properties and texture.

Therefore, the present invention relates to an absorbent article with excellent flexibility and texture.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on preferred embodiments thereof, with reference to the drawings as necessary.
The absorbent article of the present invention generally has a ventral region disposed on the ventral side of the wearer, a dorsal region disposed on the backside of the wearer, and a crotch region located therebetween. The absorbent article has a vertically elongated shape having a longitudinal direction corresponding to the front-rear direction passing through the wearer's crotch and a width direction perpendicular to the longitudinal direction. The ventral region, the crotch region, and the dorsal region are located along the longitudinal direction. The crotch region has an excretory part facing part that is arranged to face an excretory part such as the urethra or anus of the wearer when the absorbent article is worn. The ventral region, the crotch region, and the dorsal region correspond to each region when the absorbent article is virtually divided into three equal parts in the longitudinal direction.

An absorbent article generally includes an absorbent main body having a top sheet located on the wearer's skin facing side, a back sheet located on the non-skin facing side, and an absorbent body disposed between the two sheets. As the top sheet, it is preferable to use a liquid-permeable sheet material, and for example, various nonwoven fabrics, perforated films, etc. can be preferably used. As the back sheet, it is preferable to use a liquid-impermeable or liquid-impermeable sheet material, such as a liquid-impermeable film or a laminate in which a sheet with a good texture, such as a nonwoven fabric, is laminated on the outer surface of the film. can be preferably used. If necessary, the top sheet and the back sheet may each be independently composed of a single-layer sheet or a multi-layer sheet.

The absorbent body includes an absorbent core. The absorbent core is, for example, a stack of hydrophilic fibers such as cellulose including pulp, a mixed stack of hydrophilic fibers and a water-absorbing polymer, a pile of water-absorbing polymers, or two sheets of the same or different materials. It is composed of an absorbent sheet with a plurality of water-absorbing polymer particles arranged between fiber sheets. These can be used alone or in combination of two or more.

The outer surface of the absorbent core is preferably covered with a liquid-permeable core wrap sheet. The absorbent core may have at least its skin-facing surface covered with a liquid-permeable core-wrap sheet, or the entire surface including the skin-facing surface and non-skin-facing surface may be covered with the core-wrap sheet. . As the core wrap sheet, for example, thin paper made of hydrophilic fibers, nonwoven fabric having liquid permeability, etc. can be used.

In this specification, the "skin-facing surface" refers to the surface that faces the wearer's skin when the absorbent article is worn, when focusing on an absorbent article or its constituent members (for example, an absorbent body), and "non-skin-facing surface" "face" is the face that faces away from the wearer's skin when the absorbent article is worn. That is, the skin-facing surface is a surface relatively close to the wearer's skin, and the non-skin-facing surface is a surface relatively far from the wearer's skin. In addition, in this specification, "deployed state and maximum extension state" refers to the absorbent article being in the deployed state and the elastic members of each part of the absorbent article in the deployed state being stretched, thereby eliminating any influence of the elastic members. This refers to the state in which it is expanded flat until it reaches the design dimensions.

In addition to the above-mentioned top sheet, back sheet, and absorbent body, depending on the specific use of the absorbent article, leak-proof cuffs extending along the longitudinal direction may be arranged on both sides along the longitudinal direction of the skin-facing surface. It's okay.
Leakproof cuffs generally include a proximal end and a free end. The leak-proof cuff has a base end on the skin-facing side of the absorbent article, and a free end that stands up from the skin-facing side. The leak-proof cuff is made of a liquid-resistant or water-repellent and breathable sheet material. An elastic member made of rubber thread or the like may be disposed in a stretched state at or near the free end of the leak-proof cuff. By contracting this elastic member when the absorbent article is worn, the leak-proof cuff stands up toward the wearer's body, and the liquid excreted onto the top sheet flows through the top sheet and absorbs the absorbent material. Leakage outward in the width direction of the article is effectively prevented.

It is preferable that both sides of the absorbent article along the longitudinal direction are formed in a convex shape inward in the width direction in the crotch region when viewed from above. When an absorbent article is formed in such a shape, a portion having the minimum length L0, which will be described later, is typically located in the crotch region. A plurality of elastic members made of rubber thread or the like are arranged in a stretched state on both sides in the width direction of the inwardly convex portion between the two sheets constituting the absorbent article. When the absorbent article is worn, these elastic members contract to form leg gathers around the wearer's legs in the crotch region.

Depending on the specific use of the absorbent article, a plurality of elastic members made of rubber thread or the like may be arranged in a stretched state so as to extend in the width direction at least one longitudinal end of the absorbent article. Good too. Waist gathers are formed by contraction of these elastic members when the absorbent article is worn.

Furthermore, depending on the specific use of the absorbent article, an exterior body may be further provided on the non-skin facing side of the above-mentioned backsheet. The exterior body is a member that is the outer surface of the absorbent article, and is typically disposed closer to the non-skin facing surface than the back sheet. The periphery of the outer body typically forms the outlines of the ventral region, the crotch region, and the dorsal region of the absorbent article, respectively. The exterior body is joined and fixed to a member constituting the non-skin facing surface of the absorbent main body, such as a back sheet.

If the absorbent article is further provided with an exterior body, depending on the specific use of the absorbent article, the exterior body may be divided into two parts, each spaced apart from each other in the ventral region and the dorsal region, and not disposed in the crotch region. In this case, the absorbent main body may be fixed across both exterior bodies. Alternatively, the exterior body may be arranged continuously throughout the ventral region, the crotch region, and the dorsal region. In either case, both ends in the width direction of the exterior body disposed in the ventral region and the dorsal region are joined together as necessary to form a cylindrical shape when the absorbent article is worn. It can be configured as follows.

As the exterior body, for example, nonwoven fabrics used in the present technical field can be used alone or in a stack of two or more types, or an elastic sheet with a plurality of elastic members arranged between two nonwoven fabrics can be used. As such a stretchable sheet, for example, stretchable sheets described in JP-A-2008-179128 and JP-A-2007-22066 can be used.

Examples of absorbent articles having the above structure include, but are not limited to, expandable disposable diapers, pants-type disposable diapers, incontinence pads, and sanitary napkins. As will be described later, the absorbent article is preferably a disposable diaper from the viewpoint of exhibiting good flexibility and texture even when the absorbent article is formed into a thin shape.

One of the characteristics of the absorbent article of the present invention is that the ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction is equal to or more than a predetermined value in the crotch region when the absorbent article is in the unfolded state and the maximum extension state. .
BACKGROUND ART There is a demand for absorbent articles such as disposable diapers to be thin in order to improve the usability and handling properties when worn. However, if the absorbent article is simply made thin, it is not possible to ensure a sufficient thickness that allows the absorbent article to deform in the thickness direction when an external force is applied to the absorbent article. In some cases, it was difficult to make the wearer perceive the softness and texture. Furthermore, if the thickness of the absorbent article is simply increased, a sufficient thickness that can be deformed in the thickness direction can be ensured, but it is difficult to obtain the desired thin absorbent article.
As a result of intensive studies by the present inventor regarding improving this point, it was found that by making the absorbent article easier to deform in the plane direction when the absorbent article is unfolded, it was surprisingly possible to make the absorbent article thinner. However, it has been found that the wearer can be made to perceive the excellent softness and texture of the absorbent article. In addition, this excellent flexibility and texture can be achieved not only when the absorbent article is worn, but also when the user grips the absorbent article or pinches it with their fingers, for example when taking the absorbent article out of a packaging bag etc. But I also found that it was sufficiently perceptible.

Regarding the amount of deformation in the plane direction Dp and the amount of deformation in the thickness direction Dt, which are measured in the crotch region when the absorbent article is in the unfolded state and the maximum elongated state, The deformation amount ratio (Dp/Dt), which is the ratio of the amount Dp, is preferably 0.45 or more, more preferably 0.5 or more, and even more preferably 0.55 or more, and the higher the value, the more preferable it is, but 0. 8 or less is realistic. By having such a deformation amount ratio, the absorbent article has excellent flexibility and texture. A specific embodiment for satisfying such a deformation amount ratio will be described later.

From the viewpoint of making the absorbent article even more excellent in flexibility and texture, the amount of deformation Dp in the plane direction is preferably 1.7 mm or more, more preferably 1.9 mm, provided that the above deformation amount ratio is satisfied. Above, it is more preferably 2.2 mm or more, preferably 3.0 mm or less, more preferably 2.9 mm or less, still more preferably 2.8 mm or less.

From the viewpoint of making the absorbent article even more excellent in flexibility and texture, the amount of deformation in the thickness direction Dt is preferably 3.2 mm or more, more preferably 3.7 mm, provided that the deformation amount ratio described above is satisfied. Above, more preferably 3.8 mm or more, and the upper limit can be changed as appropriate depending on the thickness of the absorbent article, but preferably 5.0 mm or less, more preferably 4.5 mm or less, still more preferably It is 4.0 mm or less.

The amount of deformation Dp in the plane direction can be measured by the following method.
First, the absorbent article to be measured is brought into a developed state and a maximum elongated state, and fixed onto a flat plate with the non-skin facing surface facing upward. Next, the member constituting the non-skin facing surface in the crotch region of the absorbent article is brought into contact with artificial leather Supplare PBZ13001 (manufactured by Idemitsu Technofine Co., Ltd., black, trade name). Examples of the members constituting the non-skin-facing surface include a back sheet and an exterior body, and if an adhesive or the like is provided as a component constituting the non-skin-facing surface, the area where the adhesive is not provided may be Apply artificial leather. Next, a tensile testing machine (for example, Autograph AG-X, manufactured by Shimadzu Corporation) was attached to this artificial leather, and the artificial leather was moved in the plane direction at a tensile speed of 50 mm/min under a load of 6.8 kPa. The tensile load (N) and moving distance (mm) are measured. Then, the moving distance (mm) when the measured tensile load becomes 2.6 kPa (equivalent to 0.68 N/mm ² ) is calculated. The above measurements and calculations were performed three times in each direction by moving the artificial leather in the longitudinal direction and width direction of the absorbent article, and the arithmetic mean value of all these measurement results was calculated as follows: In the present invention, the amount of deformation in the plane direction is Dp (mm).

The amount of deformation in the thickness direction Dt can be measured by the following method.
Using a KES-G5 handy compression testing machine manufactured by Kato Tech Co., Ltd., the absorbent article to be measured is placed in the expanded state and maximum extension state on the test stand of the testing machine. The crotch area of the absorbent article was compressed in the thickness direction between two plywood boards with circular planes of the testing machine at a compression speed of 0.1 cm/sec and a maximum compression load of 68 g/ ^cm2 . Measure the maximum amount of deformation (mm). This measurement is performed three times each, and the arithmetic mean value of the measured values is defined as the amount of deformation in the thickness direction Dt (mm) in the present invention.

The thickness T1 of the absorbent article in the crotch region is preferably 8 mm or less, more preferably 6 mm or less, and still more preferably 5 mm or less, and is preferably as small as possible, but 4 mm or more is realistic. By having such a thickness, the absorbent article can be configured to be thin and yet have excellent flexibility and texture while ensuring the ability to absorb and retain excrement fluid. As a result, the absorbent article has excellent wearability, especially when worn by infants. In addition to this, for example, when the absorbent article is folded and carried, the absorbent article does not become excessively thick, resulting in improved portability. The thickness of the absorbent article was measured at three locations using a laser displacement meter, with a load of 0.5 g/cm ² (4.9 mN/cm ² ) applied to the area to be measured in the unfolded state and maximum elongation state. The above thicknesses are measured, and the arithmetic mean value of the thicknesses is defined as the thickness T1 in the present invention.

The thickness of the ventral region and dorsal region of the absorbent article is not particularly limited, but the absorbent article as a whole should be made thin to ensure sufficient absorption and retention of excretory fluid while ensuring ease of handling and flexibility. From the viewpoint of having excellent properties and texture, it is more preferable that the ventral region and the dorsal region each satisfy the above-mentioned thickness T1 range. That is, it is more preferable that the thickness of the absorbent article satisfies the range of thickness T1 mentioned above.
In order for the absorbent article to satisfy the above-mentioned thickness T1, for example, there is a method of using an absorbent sheet as a constituent member of the absorber.

Specific embodiments that can achieve the above deformation amount ratio will be described below with reference to the drawings as necessary. For convenience of explanation, the following description may focus on specific positions and members, but unless otherwise specified, these descriptions are applied as appropriate to the absorbent article of the present invention, and each structure can be combined as appropriate. In addition, the dimensions described below are based on the dimensions of the absorbent article in its unfolded state and maximum elongation state, unless otherwise specified.

Preferred embodiments for easily achieving the deformation amount ratio described above include, for example, (1) a mode in which a non-bonded region having a predetermined configuration is provided when bonding the constituent members of the absorbent article; 2) A form in which a predetermined structure is adopted for the constituent members of the absorbent article itself, but is not limited to these forms. Either one of these embodiments (1) and (2) may be adopted alone, or a combination of them may be adopted.

The embodiment (1) above will be described below, but is not limited to the following configuration.
FIG. 1 shows a schematic cross-sectional view along the width direction Y in the crotch region of an embodiment of an absorbent article. The absorbent article 1 shown in the figure includes a top sheet 2, a back sheet 3, and an absorbent core 4 disposed between the sheets 2 and 3. Further, the absorbent body 4 shown in the figure includes an absorbent core 41 capable of absorbing and retaining liquid, and a core wrap sheet 42 that covers the outer surface of the absorbent core 41. In the absorbent article 1 of the embodiment, an exterior body 5 is further disposed on the non-skin facing surface of the back sheet 3, and the exterior body 5 constitutes the outer surface of the absorbent article 1. If necessary, the absorbent article may include a pair of the above-mentioned leak-proof cuffs arranged on both sides of the skin-facing surface of the absorbent article 1 in the width direction Y (not shown).

As shown in FIG. 1, it is preferable that two constituent members adjacent to each other in the thickness direction Z of the absorbent article 1 have a plurality of bonding regions 7 where the constituent members are bonded to each other. As shown in FIGS. 2A to 2E, each bonding region 7 is preferably formed to extend in the longitudinal direction X of the absorbent article 1.
Furthermore, it is preferable that one or more non-bonded regions 8, which are regions where constituent members are not bonded, are formed between adjacent bonded regions 7, 7 in the width direction Y of the absorbent article 1. . The non-bonded region 8 is formed to extend in the longitudinal direction X of the absorbent article 1 similarly to the bonded region 7 (see FIG. 2).
Both the bonded region 7 and the non-bonded region 8 are formed to extend in the longitudinal direction X over at least the entire crotch region of the absorbent article 1, and preferably extend in the longitudinal direction formed continuously.

Taking FIG. 1 as an example, the combination of two constituent members joined by forming the joining region 7 includes the top sheet 2 and the core wrap sheet 42, the core wrap sheet 42 and the absorbent core 41, the core wrap sheet 42, and the core wrap sheet 42. Examples include one or more of the backsheet 3 and a combination of the backsheet 3 and the exterior body 5. In any combination, the non-skin-facing surface of one component and the skin-facing surface of the other component at a position facing the surface are joined via the bonding region 7, forming a bonding layer E. are doing. Additionally, along with this, a non-bonded region 8 where these surfaces are not bonded is formed in the same bonding layer E. The width of the non-bonded region 8 can be changed as appropriate depending on, for example, the formed width and number of the bonded regions 7, or the form thereof.

The above-mentioned bonding regions 7 are formed in plurality when paying attention to any two constituent members adjacent in the thickness direction Z, and the number of bonding regions 7 formed between two constituent members is 2. The number may be one or more, three or more, four or more, or more.
Similarly, the above-mentioned non-bonded region 8 may be formed only one, or two or more, depending on the number of bonded regions 7 formed. , three or more may be formed, or a larger number may be formed.
That is, in the absorbent article 1 of the present embodiment, when n bonded regions 7 are formed between the two component members, where n is an integer of 1 or more, there is a non-bonded region between the two component members. 8 is formed (n-1).
Furthermore, the numbers of bonding regions 7 and non-bonding regions 8 may be the same or different in the bonding layer formed between each component.

The joining region 7 can be formed, for example, by applying an adhesive commonly used in this technical field to the structural members to be joined. In this case, the formation pattern of the bonding region 7, that is, the adhesive coating pattern, is an intermittent pattern so that there are areas where the adhesive is not coated, as shown in FIGS. 2(a) to 2(e). It is preferable to do so. The adhesive-coated portion corresponds to the above-mentioned bonding region 7, and the adhesive-uncoated portion corresponds to the formation position of the above-mentioned non-bonding region 8.

The formation pattern of the bonding region 7 is not particularly limited as long as it is formed so as to extend in the longitudinal direction 2(a)], a spiral or omega shape [see FIG. 2(b) or (c)], or a wavy line shape [see FIG. 2(d) and (e)]. ].
Further, the widths and shapes of the bonding region 7 and the non-bonding region 8 may be the same or different among the constituent members.

The absorbent article 1 has a ratio of the maximum length L1 along the width direction Y of the non-bonded region 8 to the minimum length L0 along the width direction Y of the absorbent article 1 when the absorbent article 1 is in the unfolded state and the maximum elongated state. It is preferable that the non-bonded region 8 is formed such that the value is greater than or equal to a predetermined value. The reason for this is that, as will be described later, the region where the non-bonded region 8 exists is more easily displaced in the plane direction by the application of an external force than the region where the bonded region 7 exists. From this point of view, at least one non-bonded region 8 that satisfies this ratio may be formed in the absorbent article 1. As will be described later, for example, when a plurality of non-bonded regions 8 are formed between two constituent members adjacent in the thickness direction Z of the absorbent article 1, at least one of the plurality of non-bonded regions 8 has the ratio It is preferable that two or more of them satisfy the above ratio, it is more preferable that two or more of them satisfy the above ratio, and it is even more preferable that all non-bonded regions 8 satisfy the above ratio.

Alternatively, when a plurality of non-bonded regions 8 are formed in the thickness direction Z of the absorbent article 1, it is preferable that the non-bonded regions 8 in at least one layer satisfy the above ratio, and the non-bonded regions 8 in two or more layers preferably satisfy the above ratio. It is more preferable that the above ratio is satisfied, and it is even more preferable that the non-bonded regions 8 in all layers satisfy the above ratio.

In any of the above cases, the non-bonded region 8 that satisfies the above ratio is preferably formed at least in the crotch region of the absorbent article 1, and is formed continuously throughout the entire crotch region. is more preferable, and it is even more preferable that it is formed continuously throughout the ventral region, the crotch region, and the dorsal region.

In detail, the ratio (L1/L0) of the above-mentioned maximum length L1 to the above-mentioned minimum length L0 is preferably 0.2 or more, more preferably 0.3 or more, still more preferably 0.4 or more, It is preferable that the non-bonded region 8 is formed so that the ratio is preferably 0.5 or more.
By forming the non-bonded region 8 that satisfies the above-mentioned L1/L0 ratio in the absorbent article 1, the region where the non-bonded region 8 exists is more easily displaced in the plane direction by application of an external force than the region where the bonded region 7 exists. Therefore, it is easy for the user to perceive excellent flexibility and texture, and it is also easy to achieve the above-mentioned deformation amount ratio. Furthermore, as the L1/L0 ratio increases, more specifically, when the L1/L0 ratio is preferably 0.2 or more, the range in which displacement is likely to occur in the plane direction increases, so that the effects of the present invention are more prominently exhibited. It is advantageous in that it allows
The upper limit of the L1/L0 ratio is theoretically 1.0 or less, but it should increase the bonding strength between adjacent structural members to develop sufficient strength for practical use while providing excellent flexibility and texture. From this point of view, it is preferably 0.9 or less, more preferably 0.8 or less.

In addition, from the viewpoint of reducing unintentional twisting and wrinkles of the constituent members disposed on the skin-facing surface side and improving the feel on the skin when worn, the members constituting the skin-facing surface of the absorbent article 1, It is preferable that a non-bonded region 8 satisfying the above-mentioned L1/L0 ratio is formed at a position other than between this member and an adjacent component.
In other words, a preferable combination of the two components in which the non-bonded region 8 satisfying the above-mentioned L1/L0 ratio is formed is the absorbent core 41 and the component located on the non-skin facing side of the absorbent core 41. , taking FIG. 1 as an example, the core wrap sheet 42 (however, the portion located on the non-skin facing surface side than the absorbent core 41), the absorbent core 41, the core wrap sheet 42, the back sheet 3, and the back sheet 3 and the exterior body 5.

When the non-bonded region 8 in which the L1/L0 ratio described above is preferably 0.2 or more is formed, this non-bonded region 8 is formed between two constituent members adjacent in the thickness direction Z of the absorbent article 1. It is preferable that a plurality of bonding regions 7 are formed on the same plane (that is, between the same bonding layers), more preferably two or more, and three or more. It is more preferable that there be 4 or less, and 4 or less is realistic. In this case, the plurality of non-bonded regions 8 may each have the same L1/L0 ratio, or may have different L1/L0 ratios. As one embodiment of such an absorbent article 1, three or more bonded regions are formed between two constituent members adjacent in the thickness direction Z of the absorbent article 1, and two or more non-bonded regions 8 are formed. Examples include a form in which four or more bonding regions 7 are formed and a form in which three or more non-bonding regions 8 are formed.
With such a configuration, a plurality of regions that are easily displaced in the planar direction are formed in the planar direction, resulting in an absorbent article having excellent flexibility and texture, and the above-mentioned deformation amount ratio can be easily achieved.

When n bonded regions 7 and (n-1) non-bonded regions 8 are formed between two adjacent constituent members in the thickness direction Z of the absorbent article 1, (n-1) If 50% or more of the non-bonded regions 8 satisfy the above-mentioned L1/L0 ratio, a plurality of regions that are easily displaced in the plane direction are formed in the plane direction, resulting in excellent flexibility and The absorbent article has a good texture, and the above-mentioned deformation amount ratio can be easily achieved. From the viewpoint of making the effects of the present invention even more remarkable, it is preferable that 70% or more of the non-bonded regions 8 out of the (n-1) non-bonded regions 8 satisfy the above-mentioned L1/L0 ratio. More preferred.

Further, when the above-mentioned non-bonded region 8 is formed where the L1/L0 ratio is preferably 0.2 or more, a plurality of non-bonded regions 8 are formed in the thickness direction Z of the absorbent article 1. is also preferable. That is, it is preferable that the non-bonding regions 8 whose L1/L0 ratio is preferably 0.2 or more are formed in two or more different bonding layers in the thickness direction Z. More specifically, a first bonding layer in which a bonding region 7 is formed between two constituent members adjacent in the thickness direction Z of the absorbent article 1, and two such structures that are a different combination. It is preferable that a non-bonding region 8 having an L1/L0 ratio of preferably 0.2 or more is formed in each of the second bonding layer in which the bonding region 7 is formed between the members.

In this case, the non-bonded regions 8 are preferably formed in two different bonded layers in the thickness direction Z of the absorbent article 1, and preferably formed in three or more different bonded layers. is more preferable. Further, the plurality of non-bonded regions 8 formed in each bonding layer may have the same or different L1/L0 ratios, but the absorbent articles 1 are arranged adjacent to each other in the thickness direction. When there are at least three members, the non-bonded region 8 located on the non-skin facing surface side may have a smaller L1/L0 ratio than the non-bonded region 8 located on the skin-facing surface side of the non-bonded region 8. preferable. This reduces the unintentional occurrence of twists and wrinkles in the constituent members located on the non-skin-facing side of the absorbent article, and as a result, the absorbent article has even better flexibility and texture. be able to. Further, the layers in which the non-bonding regions 8 satisfying the above-mentioned L1/L0 ratio are formed may or may not be adjacent in the thickness direction Z. "Adjacent in the thickness direction Z" means that the bonding layers are formed between the bonding layers that are closest to each other in the thickness direction Z.
With such a configuration, a plurality of regions that are easily displaced in the planar direction can be formed in the thickness direction, resulting in an absorbent article having excellent flexibility and texture, and also making it easier to achieve the above-mentioned deformation amount ratio. .

Alternatively, if a plurality of non-bonded regions 8 are formed in the thickness direction Z, on the condition that at least one non-bonded region 8 with an L1/L0 ratio of 0.2 or more is formed in the thickness direction Z, Due to the fact that the L1/L0 ratio of the non-bonded region 8 located closest to the non-skin facing surface is smaller than the L1/L0 ratio of the non-bonded region 8 located closer to the skin, the absorbent article This is preferable because it can reduce unintentional twists and wrinkles in the component located on the non-skin facing surface. Thereby, the softness and texture of the absorbent article can be further improved. From the viewpoint of making this effect more pronounced, the L1/L0 ratio of the non-bonded region 8 located closest to the non-skin facing surface is set to the L1/L0 ratio of the non-bonded region 8 located closer to the skin side. Provided that it is smaller than the L0 ratio, it is preferably at least 0.008, more preferably at least 0.01, even more preferably at least 0.03, even more preferably at least 0.05. Furthermore, the L1/L0 ratio of the non-bonded region 8 located closest to the non-skin facing surface is preferably 0.07 or less, more preferably 0.05 or less. In addition to the non-bonded region 8 with an L1/L0 ratio of 0.2 or more, the non-bonded region 8 with an L1/L0 ratio within this range is formed, so that the non-skin facing side of the absorbent article is formed. It is possible to reduce unintentional twists and wrinkles in the constituent members located therein, particularly the exterior body 5, and as a result, the absorbent article can have even better flexibility and texture.

Further, the absorbent article 1 is configured such that when m constituent members are adjacent to each other in the thickness direction Z, a bonding layer E of (m-1) layers is formed, where m is an integer of 1 or more. ing. For example, when four constituent members are adjacent to each other in the thickness direction Z of the absorbent article 1, three bonding layers E are formed.
In the thickness direction Z of the absorbent article 1, when (m-1) bonding layers E are formed, the number of bonding layers E that is 30% or more of the (m-1) bonding layers E is 50. % or more of the unbonded region 8 satisfies the above-mentioned L1/L0 ratio, a plurality of regions that are easily displaced in the planar direction are formed in the planar direction, resulting in an absorbent article having excellent flexibility and texture, Further, the effect of easily achieving the deformation amount ratio described above is sufficiently exhibited. From the viewpoint of making the effects of the present invention even more remarkable, 50% or more of the non-bonded regions 8 in 50% or more of the (m-1) bonding layers E are located in the above-mentioned L1/ It is more preferable that the L0 ratio is satisfied.

When a plurality of non-bonded regions 8 having the above-mentioned L1/L0 ratio of preferably 0.2 or more are formed in the thickness direction Z, these non-bonded regions 8 overlap each other in the thickness direction Z (Fig. 1 and FIG. 3). With such a configuration, regions that are easily displaced in the plane direction can be formed so as to overlap in the thickness direction, and excellent flexibility and texture can be effectively expressed at the positions where the non-bonded regions 8 overlap in the thickness direction. can be done. Further, from the same viewpoint, it is also preferable that the regions in each non-bonded region 8, in which the L1/L0 ratio is preferably 0.2 or more, overlap with each other in the thickness direction Z, are formed in the center portion of the absorbent article 1 in the width direction. . The number of such non-bonded regions 8 formed in the thickness direction Z may be two or more, three or more, four or more. The number may be larger than that. One embodiment of such an absorbent article 1 includes a configuration in which two non-bonded regions 8 having an L1/L0 ratio of preferably 0.2 or more are formed in the thickness direction Z.

Alternatively, if a plurality of non-bonded regions 8 having the above-mentioned L1/L0 ratio of preferably 0.2 or more are formed in the thickness direction Z, these non-bonded regions 8 overlap each other in the thickness direction Z. It is also preferable to arrange it so that it does not occur. With such a configuration, a region that is easily displaced in the plane direction can be formed in the entire width direction of the absorbent article 1, so that excellent flexibility and texture can be effectively expressed in the entire width direction. can. Further, from the same viewpoint, regions in each non-bonded region 8 in which the L1/L0 ratio is preferably 0.2 or more and which do not overlap with each other in the thickness direction Z may be formed in the widthwise central portion of the absorbent article 1. preferable. The number of such non-bonded regions 8 formed in the thickness direction Z may be two or more, three or more, and four or more. There may be more than that number. One embodiment of such an absorbent article 1 includes a configuration in which two non-bonded regions 8 having an L1/L0 ratio of preferably 0.2 or more are formed in the thickness direction Z.

FIG. 3 schematically depicts another embodiment of the absorbent article of the present invention. The embodiment shown in the figure has at least three bonding layers E, and a non-bonding region 8 is formed in each bonding layer in the thickness direction Z of the absorbent article 1.
The absorbent article 1 shown in the figure has a first bonding layer 7A, a second bonding layer 7B, and a third bonding layer 7C are provided in this order. The first bonding layer 7A has a first non-bonding region 81. Similarly, the second bonding layer 7B has a second non-bonding region 82. Similarly, the third bonding layer 7C has a third non-bonding region 83. These non-bonded regions 81, 82, 83 are formed at least in the crotch region of the absorbent article 1. These non-bonded regions 81, 82, and 83 may be formed adjacent to each other in the thickness direction Z, or may not be formed adjacent to each other.

In the embodiment shown in FIG. 3, each bonding layer is formed closer to the non-skin facing surface than the absorbent core 41. Specifically, in the first bonding layer 7A, the non-skin-facing surface of the absorbent core 41 and the skin-facing surface of the core wrap sheet 42 facing the surface are bonded by the first bonding region 71. A first non-bonding region 81 is formed between the bonding regions 71 and 72 adjacent to each other in the Y direction. Similarly, in the second bonding layer 7B, the non-skin-facing surface of the core wrap sheet 42 and the skin-facing surface of the back sheet 3 facing the surface are bonded by the second bonding region 72. A second non-bonded region 82 is formed between adjacent bonded regions 72, 72. Similarly, in the third bonding layer 7C, the non-skin-facing surface of the back sheet 3 and the skin-facing surface of the exterior body 5 facing the surface are bonded by the third bonding region 73. A third non-bonding region 83 is formed between adjacent bonding regions 73 .
In the embodiment shown in the figure, these non-joining regions 81, 82, and 83 are each formed in the crotch region. The non-bonded regions 81, 82, and 83 are formed adjacent to each other in the thickness direction Z, and each has an overlapping region As in the thickness direction Z.
Further, the third non-bonded region 83 shown in the figure is formed in the third bonding layer 7C, which is the bonding layer located on the side closest to the non-skin facing surface of the absorbent article 1.

As described above, when the first non-bonded region 81, the second non-bonded region 82, and the third non-bonded region 83 are formed in the absorbent article 1, each non-bonded region 81, 82, 83 The L1/L0 ratio in each is preferably within a predetermined range.
In the following description, for convenience, each maximum length along the width direction Y of the first non-bonded region 81, the second non-bonded region 82, and the third non-bonded region 83 is referred to as the maximum length L1a, the maximum length Although the length L1b and the maximum length L1c will be described with different symbols, both of these maximum lengths have the same meaning as the maximum length L1 described above, and can be read as the maximum length L1 as appropriate.

Specifically, the L1/L0 ratio of the first non-bonded region 81 is preferably 0.008 or more, more preferably 0.2 or more, still more preferably 0.3 or more, and 0.4 or less is realistic. It is true.
Further, the L1/L0 ratio of the second non-bonded region 82 is preferably 0.008 or more, more preferably 0.2 or more, still more preferably 0.3 or more, and realistically 0.4 or less. It is true.
In this case, the L1/L0 ratios of the first non-bonded region 81 and the second non-bonded region 82 may be the same or different. When the L1/L0 ratio is different between the non-bonded regions 81 and 82, the L1/L0 ratio of the first non-bonded region 81 may be larger than the L1/L0 ratio of the second non-bonded region 82, The L1/L0 ratio of the first non-bonded region 81 may be smaller than the L1/L0 ratio of the second non-bonded region 82. From the viewpoint of reducing the unintentional occurrence of twists and wrinkles in the constituent members located on the non-skin-facing side of an absorbent article, thereby improving the flexibility and texture of the absorbent article, It is more preferable that the L1/L0 ratio of the first non-bonded region 81 is larger than the L1/L0 ratio of the second non-bonded region 82.
In any case, it is preferable that the first non-bonded region 81 and the second non-bonded region 82 have regions that overlap with each other in the thickness direction Z of the absorbent article 1.

On the other hand, the third non-bonding region 83, that is, the non-bonding region located closest to the non-skin facing surface, has an L1/L0 ratio of preferably 0.008 or more, more preferably 0.01 or more, and still more preferably 0. It is at least .02, more preferably at least 0.03, preferably at most 0.07, more preferably at most 0.05.
In this case, the L1/L0 ratio of the third non-bonded region 83 is different from the L1/L0 ratio of the first non-bonded region 81 and preferably different from the L1/L0 ratio of the second non-bonded region 82. . Further, the L1/L0 ratio of the third non-bonded region 83, that is, the non-bonded region located closest to the non-skin facing surface, is the same as that of the third non-bonded region 83, which is the non-bonded region located closer to the skin than the third non-bonded region 83. It is smaller than the L1/L0 ratio of the first non-bonded region 81 and smaller than the L1/L0 ratio of the second non-bonded region 82 which is a non-bonded region located closer to the skin than the third non-bonded region 83. It is more preferable. As a result, it is possible to reduce the unintentional occurrence of twists and wrinkles in the constituent members located on the non-skin-facing side of the absorbent article, and as a result, the absorbent article has even better flexibility and texture. be able to. Further, it is preferable that the third non-bonded region 83 has a region that overlaps each of the first non-bonded region 81 and the second non-bonded region 82 in the thickness direction Z of the absorbent article 1.
By configuring the three non-bonded regions 81, 82, and 83 each having the above-mentioned L1/L0 ratio, regions that are easily displaced in the planar direction can be formed in multiple layers inside the article, so that the deformation in the planar direction is prevented. The number of possible parts increases, and the amount of deformation in the plane direction further increases. As a result, the flexibility and feel of the absorbent article 1 are further improved, particularly at the positions where the non-bonded regions overlap in the thickness direction Z.

When the third non-bonded region 83 is formed on the side closest to the non-skin facing surface of the absorbent article 1, the maximum length L1c of the third non-bonded region 83 in the width direction Y (see FIG. 3) and the maximum length L1b along the width direction Y of the second non-bonded region 82, which is a non-bonded region located closer to the skin-facing surface than the third non-bonded region 83 and adjacent in the thickness direction Z (FIG. ), it is preferable that the maximum length L1c of the third non-bonded region 83 along the width direction Y is shorter than the maximum length L1b of the second non-bonded region 82 along the width direction Y. . That is, it is preferable that the L1/L0 ratio of the third non-bonded region 83 is smaller than the L1/L0 ratio of the second non-bonded region 82.

In addition, as shown in FIG. 3, a first non-bonded region 81 is formed as a non-bonded region 8 located closer to the skin-facing surface than the second non-bonded region 82 and adjacent in the thickness direction Z. In this case, the maximum length L1a of the first non-bonded region 81 in the width direction Y is preferably longer than the maximum length L1b of the second non-bonded region 82 in the width direction Y. That is, in the relationship between the maximum lengths L1 of the non-bonded regions 81, 82, 83 along the width direction Y, the maximum length L1a of the first non-bonded region 81 along the width direction Y is the longest, and the third The maximum length L1c along the width direction Y of the non-bonded region 83 is the shortest, and the maximum length L1b along the width direction Y of the second non-bonded region 82 is the maximum length L1a of each non-bonded region 81, 83, It is more preferable that the length is between L1c. This means that the L1/L0 ratio of the first non-bonded region 81 is the largest, the L1/L0 ratio of the third non-bonded region 83 is the smallest, and the L1/L0 ratio of the second non-bonded region 82 is This has the same meaning as being an intermediate value compared to the L1/L0 ratio of the non-bonded regions 81 and 83.
By configuring the three non-bonded regions 81, 82, 83 having the above-mentioned positional relationship and maximum length L1 relationship in the thickness direction Z, a multilayered region that is easily displaced in the plane direction is formed inside the article. As a result, the number of parts that can be deformed in the plane direction increases, and the amount of deformation in the plane direction further increases. As a result, the flexibility and texture of the absorbent article 1 are further improved.

The minimum length L0 along the width direction Y of the absorbent article 1 can be changed as appropriate depending on the structure and shape of the target absorbent article 1, but is preferably 160 mm or more, more preferably 180 mm or more, and even more preferably is 200 mm or more, preferably 270 mm or less, more preferably 250 mm or less, still more preferably 230 mm or less. Moreover, it is preferable that the region having this minimum length L0 be located in the crotch region of the absorbent article 1.

Further, the maximum length L1 along the width direction of the non-bonded region 8 formed in the absorbent article 1 can be changed as appropriate depending on the configuration and shape of the intended absorbent article 1 or the formation mode of the bonded region 7. However, on the condition that the above-mentioned minimum length L0 or less, each independently is preferably 20 mm or more, more preferably 30 mm or more, even more preferably 40 mm or more, and preferably 110 mm or less, more preferably It is 100 mm or less, more preferably 90 mm or less. Further, it is preferable that the region having the maximum length L1 be located in the crotch region of the absorbent article 1.

Further, in a preferred embodiment of the absorbent article 1, when the first non-bonded region 81, the second non-bonded region 82, and the third non-bonded region 83 are formed in the absorbent article 1, The maximum length L1a along the width direction Y of the non-bonding region 81 of No. 1 is preferably 20 mm or more, more preferably 30 mm or more, and even more preferably 40 mm or more, provided that it is the above-mentioned minimum length L0 or less. , preferably 110 mm or less, more preferably 100 mm or less, still more preferably 90 mm or less.

Similarly, the maximum length L1b of the second non-bonded region 82 along the width direction Y is preferably 20 mm or more, more preferably 30 mm or more, and even more preferably The length is 40 mm or more, preferably 110 mm or less, more preferably 100 mm or less, and still more preferably 90 mm or less.
Similarly, the maximum length L1c of the third non-bonding region 83 along the width direction Y is preferably 1 mm or more, more preferably 2 mm or more, and even more preferably is 3 mm or more, preferably 10 mm or less, more preferably 9 mm or less, even more preferably 8 mm or less.

As shown in FIG. 2(b), the maximum length L1 (or maximum length L1a to L1c) of each non-bonded region along the width direction Y is determined by the fact that only one formation pattern of the bonded region 7 is formed macroscopically. In the case where there is a non-bonded region 8 within the bonded region because the bonded region 7 is formed in a continuous curve such as a spiral shape, the maximum length L1 is the maximum length of the non-bonded region 8 inside the bonded region 7. judge as such. On the other hand, when the formation pattern of the bonding region 7 is macroscopically composed of a plurality of continuous curves such as a spiral shape, for example, as shown in FIG. Among the dimensions, the larger one is defined as L1. Therefore, in the case of the bonding region shown in FIG. 2(c), D1 is L1.
When the formation pattern of the bonding region 7 is macroscopically composed of a plurality of continuous wave-shaped curves, for example, in the case shown in FIG. 2(d), the phases of the continuous wave-shaped curves match. The maximum length L1 is the maximum length along the width direction Y between the adjacent joining regions 7, 7. On the other hand, as shown in FIG. 2(e), the maximum length L1 when the phases of the bonding regions 7 made of a plurality of continuous curves of wavy shapes are different from each other is The length between adjacent positions.

The embodiment (2) above will be described below, but it is not limited to the configuration described below.
It is preferable that the absorbent core 4, which is a component of the absorbent article 1, includes an absorbent sheet as the absorbent core 41. By including the absorbent sheet, the absorbent article can be made thinner and easier to handle, and has higher liquid absorbency. The absorbent core 41 may be composed of only an absorbent sheet, or may be composed of an absorbent sheet, a mixed product of hydrophilic fibers and a water-absorbing polymer arranged on the skin-facing surface of the absorbent sheet, if necessary. It is good also as a structure further provided with a fibrous body.

FIG. 4 shows an embodiment of the absorbent sheet 10. The absorbent sheet 10 shown in FIG. 4 includes two fiber sheets 11 and 12, which may be the same or different, and particles of a water-absorbing polymer 13 disposed between the fiber sheets 11 and 12. A plurality of particles of the water-absorbing polymer 13 shown in the figure are arranged in the sheet surface direction. The water-absorbing polymer 13 in this embodiment is held in the fiber sheet by, for example, entanglement with the fibers constituting each of the fiber sheets 11 and 12, or by the adhesiveness developed when the polymer 13 absorbs water. .

In addition to these embodiments, the water-absorbing polymer 13 is held on the fiber sheet via an adhesive (not shown) provided on the surface of each fiber sheet 11, 12 facing the water-absorbing polymer 13. may have been done. In addition, in FIG. 4, for convenience of explanation, each fiber sheet 11, 12 is shown as a different member, but it is not limited to this form, and each fiber sheet 11, 12 may use the same thing. Further, the fibers constituting each fiber sheet 11, 12 may be the same or different. Further, the fibers constituting each fiber sheet 11, 12 may be composed of a single type, or a plurality of types may be mixed. As each fiber sheet 11, 12, paper, woven fabric, nonwoven fabric, etc. can be used independently.
As the absorbent sheet, for example, the absorbent sheet described in JP-A-8-246395 can be used.

The thickness of the absorbent sheet is preferably 0.3 mm or more, more preferably 0.6 mm or more, from the viewpoint of improving liquid absorbency. Further, from the viewpoint of improving usability while making it easier to construct the absorbent sheet or the absorbent article including the sheet into a thin shape, the thickness of the absorbent sheet is preferably 4 mm or less, more preferably 3 mm or less, and still more preferably It is 2 mm or less. The thickness of the absorbent sheet described above is the thickness of the entire absorbent sheet measured under a pressure of 1.7 kPa.

When the absorbent body 4 further includes the absorbent sheet 10 as the absorbent core 41, the non-bonded region 8 is located at a position facing the fiber sheet that constitutes the non-skin facing surface of the absorbent sheet 10. It is preferable that it is formed between the core wrap sheet 42 and the skin-facing surface. The formation position of the non-bonding region 8 in this form corresponds to the position of the first non-bonding region 81, taking FIG. 3 as an example. Even in this case, the L1/L0 ratio of the non-bonded region 8 formed between the absorbent sheet 10 and the core wrap sheet 42 preferably satisfies 0.2 or more, and will not be particularly described. Regarding this point, the explanation regarding the first non-bonding region 81 mentioned above applies as appropriate.

While achieving high liquid absorption and liquid retention properties of the absorbent body 4, the flexibility of the absorbent body 4 itself in the plane direction is increased to facilitate deformation, thereby making it easier to achieve the above deformation amount ratio. Therefore, it is preferable that the absorbent core 41 in the absorbent body 4 is configured to include a fiber sheet containing non-fusible fibers and heat-fusible fibers. Moreover, it is preferable that such a sheet material is also used as a component of the fiber sheet in the above-mentioned absorbent sheet 10. The fiber sheet containing non-fusible fibers and heat-fusible fibers is a blend of multiple types of fibers. Such a fiber sheet may be used for only one fiber sheet in the absorbent sheet 10, or may be used for both fiber sheets.

In addition to or in place of this, it is preferable that at least one of the topsheet 2 and the exterior body 5 includes a fiber sheet containing non-fusible fibers and heat-fusible fibers. As a result, the constituent materials of the absorbent article 1, such as the topsheet 2 and the exterior body 5, can be easily deformed in the plane direction, and the above deformation amount ratio can be easily achieved, and the absorbent article The texture is further improved.

Non-fusible fibers refer to fibers that do not fuse together when heat is applied. Examples of such non-fusible fibers include natural fibers such as pulp and cotton, cellulose fibers such as rayon, Lyocell, and Tencel, and these fibers may be used alone or in combination of two or more. It can be used as These fibers can also be used as hydrophilic fibers constituting the absorbent core 41.

Heat-fusible fibers refer to fibers whose constituent components are partially melted by the application of heat, allowing the fibers to adhere to each other. Examples of heat-fusible fibers include fibers containing thermoplastic resins, and specific examples include polyolefin fibers such as polyethylene and polypropylene, polyester fibers, polyethylene-polypropylene composite fibers, and fibrous polyvinyl alcohol. It will be done. The form of such fibers may be fibers containing a single thermoplastic resin, fibers containing a mixture of two or more thermoplastic resins, or fibers composed of a high melting point resin and a low melting point resin. Core-sheath fibers, side-by-side type fibers, etc. can be selected as appropriate.

As mentioned above, when using a fiber sheet containing non-fusible fibers and heat-fusible fibers as the absorbent core 41, from the viewpoint of maintaining the product form while improving the amount of deformation in the plane direction, the fiber sheet is The proportion of non-fusible fibers therein is preferably 10% by mass or more, more preferably 25% by mass or more, even more preferably 40% by mass or more, and preferably 70% by mass or less, more preferably 60% by mass or less. , more preferably 50% by mass or less.
On the other hand, when using a fiber sheet containing non-fusible fibers and heat-fusible fibers as the top sheet 2 and/or the exterior body 5, from the viewpoint of maintaining the product form while improving the amount of deformation in the plane direction, The proportion of non-fusible fibers in the fiber sheet is preferably 0.5% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, and preferably 10% by mass or less, more preferably 8% by mass or more. It is not more than 5% by mass, more preferably not more than 5% by mass.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above-described embodiments.
In the embodiment shown in FIG. 3, when viewed along the thickness direction Z from the skin-facing surface to the non-skin-facing surface of the absorbent article 1, the relationship between the maximum length L1 along the width direction Y is "first". Although the description has been made taking as an example the embodiment in which the non-bonded region 81 > the second non-bonded region 82 > the third non-bonded region 83, the maximum length of each non-bonded region The relationship of L1 is not particularly limited.

For example, in one embodiment, the maximum length L1a of the first non-bonded region 81 is the longest, the maximum length L1b of the second non-bonded region 82 is the shortest, and the maximum length of the third non-bonded region 83 is the shortest. L1c may be an intermediate length between the maximum lengths L1a and L1b.
Alternatively, in another embodiment, the maximum length L1b of the second non-bonded region 82 is the longest, the maximum length L1a of the first non-bonded region 81 is the shortest, and the maximum length of the third non-bonded region 83 is the shortest. The length L1c may be an intermediate length between the maximum lengths L1a and L1b.
Alternatively, in another embodiment, the maximum length L1b of the second non-bonded region 82 is the longest, the maximum length L1c of the third non-bonded region 83 is the shortest, and the maximum length of the first non-bonded region 81 is the shortest. The length L1a may be an intermediate length between the maximum lengths L1b and L1c.

For example, in another embodiment, the maximum length L1c of the third non-bonded region 83 is the longest, the maximum length L1b of the second non-bonded region 82 is the shortest, and the maximum length L1b of the second non-bonded region 82 is the shortest, and the maximum length L1c of the third non-bonded region 83 is the shortest, The maximum length L1a may be an intermediate length between the maximum lengths L1b and L1c.
Alternatively, in another embodiment, the maximum length L1c of the third non-bonded region 83 is the longest, the maximum length L1a of the first non-bonded region 81 is the shortest, and the maximum length of the second non-bonded region 82 is the shortest. The length L1b may be an intermediate length between the maximum lengths L1a and L1c.

Regarding the embodiments described above, the present invention further discloses the following absorbent article.
<1>
It includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and has a longitudinal direction corresponding to the front-rear direction passing through the wearer's crotch, and a longitudinal direction corresponding to the front-back direction passing through the wearer's crotch. An absorbent article having a width direction perpendicular to the longitudinal direction and having a ventral region, a crotch region, and a dorsal region along the longitudinal direction,
With the absorbent article in the unfolded state and maximum elongation state, and with the member constituting the non-skin facing surface in contact with the artificial leather in the crotch region, the artificial leather was stretched by 50 mm/cm under a load of 6.8 kPa. The moving distance (mm) when the tensile load measured by moving in the planar direction at a tensile speed of min is 2.6 kPa is the amount of deformation in the planar direction,
The crotch region of the absorbent article was compressed in the thickness direction under the conditions that the compression speed was 0.1 cm/sec and the maximum compression load was 68 g/cm ² in the expanded state and maximum elongation state of the absorbent article. An absorbent article having a ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction of 0.45 or more, when the maximum amount of deformation (mm) measured at the time is taken as the amount of deformation in the thickness direction.

<2>
The ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction is 0.5 or more, preferably 0.5 or more and 0.8 or less, more preferably 0.55 or more and 0.8 or less, described in <1> above. absorbent articles.
<3>
The thickness of the crotch area under a load of 0.5 g/ ^cm2 is 8 mm or less,
The absorbent article according to <1> or <2>, wherein the amount of deformation in the thickness direction is 3.2 mm or more.
<4>
The absorbent article according to <3>, wherein the amount of deformation in the thickness direction is 3.2 mm or more and 5.0 mm or less, preferably 3.7 mm or more and 4.5 mm or less, more preferably 3.8 mm or more and 4.0 mm or less. .
<5>
The absorbent article according to <3> or <4>, wherein the thickness of the crotch region under a load of 0.5 g/ ^cm2 is 4 mm or more and 6 mm or less, preferably 4 mm or more and 5 mm or less.
<6>
Any of <1> to <5> above, wherein the amount of deformation in the planar direction is 1.7 mm or more and 3.0 mm or less, preferably 1.9 mm or more and 2.9 mm or less, more preferably 2.2 mm or more and 2.8 mm or less. The absorbent article described in (1) above.

<7>
a plurality of bonded regions extending in the longitudinal direction where two constituent members adjacent in the thickness direction of the absorbent article are bonded; and a non-bonding region located between the bonded regions adjacent in the width direction and extending in the longitudinal direction. a region is formed at least in the crotch region,
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is The absorbent article according to any one of <1> to <6>, wherein the non-bonded area is 0.2 or more.
<8>
Three or more bonded regions are formed between the two constituent members adjacent in the thickness direction, and two or more non-bonded regions are formed,
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is The absorbent article according to <7>, which has two non-bonded regions between the constituent members having a bonding area of 0.2 or more.
<9>
Four or more bonded regions are formed between the two constituent members adjacent in the thickness direction, and three or more non-bonded regions are formed,
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is The absorbent article according to <7>, which has three or more non-bonded areas between the constituent members, the non-bonded area being 0.2 or more.
<10>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is The absorbent article according to any one of <7> to <9>, which has the non-bonded area of 0.3 or more.

<11>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is 1. <7>, wherein the non-bonded region has an area of 0 or less, preferably 0.3 or more and 0.9 or less, more preferably 0.4 or more and 0.8 or less, and still more preferably 0.5 or more and 0.8 or less. ~The absorbent article according to any one of <10>.
<12>
The absorbent article has at least three constituent members adjacent to each other in the thickness direction,
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is 0. having at least one non-bonded region of 2 or more in the thickness direction;
The ratio (L1/L0) of the non-bonded region located closest to the non-skin facing surface of the absorbent article is smaller than the ratio (L1/L0) of the non-bonded region located closer to the skin. , the absorbent article according to any one of <7> to <11> above.
<13>
The maximum length along the width direction of the non-bonded region located closest to the non-skin facing surface of the absorbent article with respect to the minimum length L0 along the width direction when the absorbent article is in the unfolded state and the maximum stretched state. The ratio of length L1 (L1/L0) is 0.008 or more and 0.07 or less, preferably 0.01 or more and 0.05 or less, more preferably 0.03 or more and 0.05 or less, and even more preferably 0.05 or more and 0.05 or less. The absorbent article according to <12> above, wherein the non-bonded area is .05 or less.
<14>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is having two non-bonded regions in the thickness direction that are 0.2 or more,
The absorbent article according to any one of <7> to <13>, wherein each of the non-bonded regions has a region that overlaps with each other in the thickness direction.

<15>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is having two non-bonded regions in the thickness direction that are 0.2 or more,
The absorbent article according to any one of <7> to <13>, wherein the non-bonded regions do not overlap each other in the thickness direction.
<16>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is 0.2 or more of the first non-bonded region and the second non-bonded region, and the width between the adjacent bonded regions with respect to the minimum length L0 along the width direction. further comprising the third non-bonded region in which the ratio (L1/L0) of the maximum length L1 along the direction is 0.01 or more,
The first non-bonded region and the second non-bonded region have regions that overlap each other in the thickness direction,
The absorbent article according to any one of <7> to <14>, wherein the third non-bonded region is formed on the side closest to the non-skin facing surface of the absorbent article.
<17>
The maximum length along the width direction of the non-bonded region formed on the side closest to the non-skin facing surface of the absorbent article is such that the non-bonded region is located closer to the skin facing surface than the non-bonded region and is adjacent to the non-skin facing surface in the thickness direction. The absorbent article according to any one of <7> to <16>, wherein the absorbent article is shorter than the maximum length along the width direction of the non-bonded region.
<18>
When n bonded regions and (n-1) non-bonded regions are formed between two constituent members adjacent in the thickness direction, among the (n-1) non-bonded regions It is preferable that 50% or more of the non-bonded area satisfies the ratio (L1/L0), and it is more preferable that 70% or more of the non-bonded area satisfies the ratio (L1/L0). , the absorbent article according to any one of <7> to <17>.
<19>
The two constituent members adjacent in the thickness direction are joined via the joining region, thereby forming a joining layer,
In the thickness direction, when (m-1) bonding layers are formed, 30% or more of the bonding layers out of the (m-1) bonding layers account for 50% or more of the non-bonded layers. It is preferable that the region satisfies the ratio (L1/L0), and it is preferable that 50% or more of the non-bonded region in the bonding layer that is 50% or more of the bonding layer satisfies the ratio (L1/L0). More preferably, the absorbent article described in <18> above.

<20>
When the absorbent article is viewed along the thickness direction from the skin-facing surface to the non-skin-facing surface, the first non-bonded region, the second non-bonded region and the third non-bonded region are They are formed adjacent to each other in the thickness direction in this order,
The third non-bonded region is formed on the side closest to the non-skin facing surface of the absorbent article,
The maximum length along the width direction of each of the non-bonded regions is such that the first non-bonded region is the longest, the third non-bonded region is the shortest, and the second non-bonded region is between the two regions. The absorbent article according to any one of <7> to <18> above, which has a length.
<21>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is 0. The absorbent according to <20>, wherein the first non-bonded region has an absorbency of 0.08 or more and 0.4 or less, preferably 0.2 or more and 0.4 or less, and more preferably 0.3 or more and 0.4 or less. Goods.
<22>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is 0. The above <20> or <21> has the second non-bonded region having a size of 0.08 or more and 0.4 or less, preferably 0.2 or more and 0.4 or less, more preferably 0.3 or more and 0.4 or less. Absorbent article as described.
<23>
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is 0. 008 or more and 0.07 or less, preferably 0.01 or more and 0.05 or less, more preferably 0.02 or more and 0.05 or less, and still more preferably 0.03 or more and 0.05 or less. The absorbent article according to any one of <20> to <22> above.
<24>
The absorbent according to any one of <1> to <23>, wherein the minimum length L0 along the width direction is 160 mm or more and 270 mm or less, preferably 180 mm or more and 250 mm or less, more preferably 200 mm or more and 230 mm or less. Goods.

<25>
The maximum length L1 of the non-bonded region along the width direction is independently 20 mm or more and 110 mm or less, preferably 30 mm or more and 100 mm or less, provided that it is the minimum length L0 or less along the width direction. The absorbent article according to <24> above, which is more preferably 40 mm or more and 90 mm or less.
<26>
The maximum length L1a of the first non-bonding region along the width direction is 20 mm or more and 110 mm or less, preferably 30 mm or more and 100 mm or less, more preferably The absorbent article according to any one of <20> to <23> above, having a length of 40 mm or more and 90 mm or less.
<27>
The maximum length L1b of the second non-bonded region along the width direction is 20 mm or more and 110 mm or less, preferably 30 mm or more and 100 mm or less, more preferably The absorbent article according to any one of <20> to <23> and <26>, which has a length of 40 mm or more and 90 mm or less.
<28>
The maximum length L1c of the third non-bonded region along the width direction is 1 mm or more and 10 mm or less, preferably 2 mm or more and 9 mm or less, more preferably The absorbent article according to any one of <20> to <23>, <26>, and <27>, which has a length of 3 mm or more and 8 mm or less.
<29>
The absorbent body includes an absorbent core and a core wrap sheet that covers the outer surface of the absorbent core,
The absorbent core includes an absorbent sheet in which a water-absorbing polymer is arranged between two sheets,
In the unfolded state and maximum elongation state of the absorbent article, the ratio (L1/L0) of the maximum length L1 between the adjacent joining regions along the width direction to the minimum length L0 along the width direction is The absorbent article according to any one of <7> to <28>, wherein the non-bonded region having a bonding ratio of 0.2 or more is formed between the absorbent sheet and the core wrap sheet.
<30>
The absorbent article according to <29> above, wherein the thickness of the absorbent sheet is 0.3 mm or more and 4 mm or less, preferably 0.6 mm or more and 3 mm or less, and more preferably 0.6 mm or more and 2 mm or less.

<31>
The absorbent article according to any one of <1> to <30>, wherein the absorbent body includes a fiber sheet containing non-fusible fibers and heat-fusible fibers.
<32>
further comprising an exterior body disposed on the non-skin facing side of the back sheet,
The absorbent article according to any one of <1> to <31>, wherein the top sheet or the exterior body includes a fiber sheet containing non-fusible fibers and heat-fusible fibers. .
<33>
The absorbent article according to any one of <1> to <32>, wherein the bonding region is formed by bonding with an adhesive.
<34>
The absorbent article according to <33>, wherein the formation pattern of the bonding region is a stripe shape, a spiral shape, an omega shape, or a wavy line shape that is a continuous line extending in the longitudinal direction.
<35>
The absorbent article according to <34>, wherein the formation pattern of the bonding region is the stripe shape.

Hereinafter, the present invention will be explained in more detail using Examples. However, the scope of the invention is not limited to such examples.

[Example 1]
Example 1 A deployable disposable diaper for babies having the configuration shown in FIG. 3 was produced. The first bonding layer in the disposable diaper of Example 1 was coated with an adhesive as shown in FIG. 2(a) to form a first bonding area and a first non-bonding area. The first non-bonded region of the disposable diaper was formed to have the maximum length along the width direction of the non-bonded region shown in Table 1. The first bonded region and the first non-bonded region were formed from the ventral region to the dorsal region through the crotch region of the disposable diaper. Similarly, a second bonded area and a second non-bonded area were formed in the second bonded layer of the disposable diaper. Furthermore, a third bonding area and a third non-bonding area were formed in the third bonding layer of the disposable diaper. The second bonding layer and the third bonding layer were formed by applying an adhesive as shown in FIG. 2(a). The minimum length L0 along the width direction of the disposable diaper of Example 1 when it was in the unfolded state and the maximum extension state was 225 mm. The thickness T1 of the diaper in the crotch area was as shown in Table 1.
In this example, three or more second bonding regions 72 and two or more second non-bonding regions 82 were formed in the second bonding layer 7B shown in FIG. 3. Further, in the third bonding layer 7C shown in the figure, four or more third bonding regions 73 were formed, and three or more third non-bonding regions 83 were formed.
Further, in this example, 100% by number of the first non-bonded regions in the first bonding layer satisfied the L1/L0 ratio shown in Table 1. 100% by number of second non-bonded regions in the second bonding layer satisfied the L1/L0 ratio shown in Table 1. 100% by number of third non-bonded regions in the third bonding layer satisfied the L1/L0 ratio shown in Table 1.

[Example 2]
The maximum length along the width direction of the first non-bonded area formed in the first bonded area in the disposable diaper of Example 1 was changed as shown in Table 1. Furthermore, the maximum length along the width direction of the second non-bonded region formed in the second bonded region was changed as shown in Table 1. A disposable diaper was obtained in the same manner as in Example 1 except for the above.

[Example 3]
The maximum length along the width direction of the first non-bonded area formed in the first bonded area in the disposable diaper of Example 1 was changed as shown in Table 1. A disposable diaper was obtained in the same manner as in Example 1 except for this.

[Example 4]
The maximum length along the width direction of the first non-bonded area formed in the first bonded area in the disposable diaper of Example 1 was changed as shown in Table 1. Furthermore, the maximum length along the width direction of the third non-bonded region formed in the third bonded region was changed as shown in Table 1. A disposable diaper was obtained in the same manner as in Example 1 except for this.

[Example 5]
The maximum length along the width direction of the first non-bonded area formed in the first bonded area in the disposable diaper of Example 1 was changed as shown in Table 1. Further, the maximum length along the width direction of the second non-bonded region formed in the second bonded region was changed as shown in Table 1. Furthermore, the thickness of the diaper in the crotch area was changed as shown in Table 1. A disposable diaper was obtained in the same manner as in Example 1 except for this.

[Comparative example 1]
A commercially available expandable disposable diaper (manufactured by Kao Corporation, trade name "Merry's (registered trademark) Sarasara Air Through", tape type) was prepared, and this was used as Comparative Example 1.

[Comparative example 2]
In Comparative Example 1, the thickness of the diaper was increased by increasing the amount of the absorbent core made of a mixed fiber stack of pulp and water-absorbing polymer, as shown in Table 1. Except for this, a diaper was obtained which could be used in the same manner as in Comparative Example 1.

[Measurement of the amount of deformation Dp in the plane direction]
For the disposable diapers obtained in Examples 1 to 5 and Comparative Examples 1 and 2, the amount of deformation Dp in the plane direction was measured according to the method described above. Table 1 shows the amount of deformation Dp in the plane direction.

[Measurement of thickness direction deformation amount Dt]
For the disposable diapers obtained in Examples 1 to 5 and Comparative Examples 1 and 2, the amount of deformation Dt in the thickness direction was measured according to the method described above. Table 1 shows the amount of deformation Dt in the thickness direction.

[Evaluation of the fit of disposable diapers]
Regarding the disposable diapers obtained in Examples 1 to 5 and Comparative Examples 1 and 2, the thickness T1 in the crotch area was measured according to the above-mentioned method, and the fit of the disposable diapers was evaluated based on the following criteria. The results are shown in Table 1 below.

[Evaluation items for the comfort of disposable diapers]
○: Thickness T1 is 8 mm or less, and the wearing feeling is excellent.
×: Thickness T1 is more than 8 mm, and the wearing feeling is poor.

[Evaluation of flexibility and texture of disposable diapers]
Ten expert panelists touched the non-skin facing surface of the back sheet in the crotch area of the disposable diapers obtained in Examples 1 to 5 and Comparative Examples 1 and 2, and evaluated the flexibility and texture of the disposable diapers as follows. It was evaluated based on the criteria. The higher the arithmetic mean value of the evaluation scores, the better the flexibility and feel of the disposable diaper. The results are shown in Table 1 below.

[Evaluation points for flexibility and texture of disposable diapers]
4 points: Surprising level of softness.
3 points: Softness that you can tell the difference from the disposable diaper of Comparative Example 1 the moment you touch it.
2 points: Very soft to the touch.
1 point: Softness that you can tell the difference from the disposable diaper of Comparative Example 1 when you touch it.
0 point: Softness equivalent to that of the disposable diaper of Comparative Example 1.

As is clear from the results shown in Table 1, the ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction was higher in the disposable diapers obtained in Examples 1 to 5 than in the disposable diapers obtained in Comparative Examples 1 and 2. I know it's big. Furthermore, it can be seen that the disposable diapers obtained in Examples 1 to 5 have superior flexibility and texture compared to the disposable diapers obtained in Comparative Examples 1 and 2. Furthermore, it can be seen that the disposable diapers obtained in Examples 1 to 5 have a thinner thickness T1 in the crotch region than the disposable diaper obtained in Comparative Example 2, and are superior in wearing comfort.

According to the present invention, an absorbent article with excellent flexibility and texture is provided.

Claims

It includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet, and has a longitudinal direction corresponding to the front-rear direction passing through the wearer's crotch, and a longitudinal direction corresponding to the front-back direction passing through the wearer's crotch. An absorbent article having a width direction perpendicular to the longitudinal direction and having a ventral region, a crotch region, and a dorsal region along the longitudinal direction,
With the absorbent article in the unfolded state and maximum elongation state, and with the member constituting the non-skin facing surface in contact with the artificial leather in the crotch region, the artificial leather was stretched by 50 mm/cm under a load of 6.8 kPa. The moving distance (mm) when the tensile load measured by moving in the planar direction at a tensile speed of min is 2.6 kPa is the amount of deformation in the planar direction,
The crotch region of the absorbent article was compressed in the thickness direction under the conditions that the compression speed was 0.1 cm/sec and the maximum compression load was 68 g/cm 2 in the expanded state and maximum elongation state of the absorbent article. An absorbent article having a ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction of 0.45 or more, when the maximum amount of deformation (mm) measured at the time is taken as the amount of deformation in the thickness direction.
The absorbent article according to claim 1, wherein the ratio of the amount of deformation in the plane direction to the amount of deformation in the thickness direction is 0.50 or more.
The thickness of the crotch area under a load of 0.5 g/ cm2 is 8 mm or less,
The absorbent article according to claim 1 or 2, wherein the amount of deformation in the thickness direction is 3.2 mm or more.
a plurality of bonded regions extending in the longitudinal direction where two constituent members adjacent in the thickness direction of the absorbent article are bonded; and a non-bonding region located between the bonded regions adjacent in the width direction and extending in the longitudinal direction. a region is formed at least in the crotch region,
The non-bonded region has a ratio of a maximum length along the width direction to a minimum length along the width direction of the absorbent article in an expanded state and a maximum elongation state of 0.2 or more. The absorbent article according to any one of items 1 to 3.
Three or more bonded regions are formed between the two constituent members adjacent in the thickness direction, and two or more non-bonded regions are formed,
In the unfolded state and the maximum stretched state of the absorbent article, the non-bonded region in which the ratio of the maximum length along the width direction to the minimum length along the width direction is 0.2 or more is the constituent member. The absorbent article according to claim 4, having two absorbent articles between them.
Four or more bonded regions are formed between the two constituent members adjacent in the thickness direction, and three or more non-bonded regions are formed,
In the unfolded state and the maximum stretched state of the absorbent article, the non-bonded region in which the ratio of the maximum length along the width direction to the minimum length along the width direction is 0.2 or more is the constituent member. The absorbent article according to claim 4, having three or more absorbent articles between them.
The non-bonded region has a ratio of a maximum length along the width direction to a minimum length along the width direction of 0.3 or more in the unfolded state and maximum elongation state of the absorbent article. The absorbent article according to any one of items 4 to 6.
In the unfolded state and maximum elongation state of the absorbent article, the non-bonded region has a ratio of 0.2 or more of the maximum length along the width direction to the minimum length along the width direction in the thickness direction. have two,
The absorbent article according to any one of claims 4 to 7, wherein each of the non-bonded regions has a region that overlaps with each other in the thickness direction.
In the unfolded state and maximum elongation state of the absorbent article, the non-bonded region has a ratio of 0.2 or more of the maximum length along the width direction to the minimum length along the width direction in the thickness direction. have two,
The absorbent article according to any one of claims 4 to 7, wherein the non-bonded regions do not overlap each other in the thickness direction.
The first non-bonded region has a ratio of a maximum length along the width direction to a minimum length along the width direction of the absorbent article in the unfolded state and maximum elongation state. the second non-bonded region, and the third non-bonded region has a ratio of the maximum length along the width direction to the minimum length along the width direction of 0.01 or more; It further has
The first non-bonded region and the second non-bonded region have regions that overlap each other in the thickness direction,
The absorbent article according to any one of claims 4 to 8, wherein the third non-bonded region is formed on the side closest to the non-skin facing surface of the absorbent article.
The maximum length along the width direction of the non-bonded region formed on the side closest to the non-skin facing surface of the absorbent article is such that the non-bonded region is located closer to the skin facing surface than the non-bonded region and is adjacent to the non-skin facing surface in the thickness direction. The absorbent article according to any one of claims 4 to 10, wherein the absorbent article is shorter than the maximum length along the width direction of the non-bonded region.
When the absorbent article is viewed along the thickness direction from the skin-facing surface to the non-skin-facing surface, the first non-bonded region, the second non-bonded region and the third non-bonded region are They are formed adjacent to each other in the thickness direction in this order,
The third non-bonded region is formed on the side closest to the non-skin facing surface of the absorbent article,
The maximum length along the width direction of each of the non-bonded regions is such that the first non-bonded region is the longest, the third non-bonded region is the shortest, and the second non-bonded region is between the two regions. An absorbent article according to any one of claims 4 to 11, which is of length.
The absorbent body includes an absorbent core and a core wrap sheet that covers the outer surface of the absorbent core,
The absorbent core includes an absorbent sheet in which a water-absorbing polymer is arranged between two sheets,
In the unfolded state and maximum elongation state of the absorbent article, the non-bonded region has a ratio of the maximum length along the width direction to the minimum length along the width direction of 0.2 or more; The absorbent article according to any one of claims 4 to 12, wherein the absorbent article is formed between a flexible sheet and the core wrap sheet.
The absorbent article according to any one of claims 1 to 13, wherein the absorbent body includes a fiber sheet containing non-fusible fibers and heat-fusible fibers.
further comprising an exterior body disposed on the non-skin facing side of the back sheet,
The absorbent article according to any one of claims 1 to 14, wherein the top sheet or the exterior body includes a fiber sheet containing non-fusible fibers and heat-fusible fibers.