CN114191183A

CN114191183A - Absorbent article series

Info

Publication number: CN114191183A
Application number: CN202111026102.7A
Authority: CN
Inventors: 桑畑耕平; 川口宏子; 佐藤信也; 渡边久记
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2020-09-02
Filing date: 2021-09-02
Publication date: 2022-03-18
Anticipated expiration: 2041-09-02
Also published as: JP2022042441A; CN114191183B

Abstract

The absorbent article array provided by the invention comprises a plurality of absorbent articles (1) with different sizes, and the plurality of absorbent articles (1) are divided into a plurality of size groups corresponding to the number of types of the sizes. The absorbent article (1) has a disposal tape (4) which is fixed to the outer surface thereof and has stretchability. Regarding the swelling compaction index or the winding packing index of the disposal tape (4) of the absorbent article (1), the following dimensional relationship holds between at least some of the plurality of dimensional groups: relatively small-sized size groups > relatively large-sized size groups.

Description

Absorbent article series

Technical Field

The present invention relates to an absorbent article array including a plurality of absorbent articles having different sizes.

Background

As an absorbent article which can be easily and hygienically discarded after use, there is known a configuration in which a disposal tape is provided on the outer surface of the absorbent article, and the state of the absorbent article wound into a small roll is maintained by the disposal tape. Patent document 1 describes a fixing member that can be used as a disposal tape for an absorbent article, and describes, as an example of use of the fixing member, a disposable diaper in which the fixing member is provided on an outer surface of the disposable diaper so as to be stretchable in a longitudinal direction (a front-rear direction of a wearer of the diaper) during use, and the fixing member is rolled up in the longitudinal direction and wound up in a rolling direction of the lumped diaper to be in a disposal state, thereby maintaining the disposal state. In addition, as for an example of use of the above-mentioned fixing member, when the disposable diaper is allowed to absorb 200ml of water at 40 ℃ and left standing for 2 minutes, the fixing member stretched with a force of 500gf is wound up, and the adhesive layer of the fixing member is left standing for 1 hour in a state of being adhered to the diaper, the adhered state of the adhesive layer is maintained ([ 0074] of patent document 1).

Patent document 2 describes an arrangement of packages containing 3 or more pants-type disposable diapers of different sizes. According to patent document 2, the "arrangement" is a display of a package including diapers of different sizes having similar article structures, and the "package" has the same brand and/or sub-brand and is disposed at positions close to each other in a predetermined area of a retail store ([ 0018] of patent document 2). The "array" includes first, second, and third packages, and a predetermined size relationship among the packages is established with respect to the dimensions (product length, waist width, and the like) of each portion of the diaper included in the package. According to the arrangement of the package described in patent document 2, the diaper included in the arrangement is designed to be provided to various wearers in accordance with the BMI and body shapes of the wearers, and is suitable for a wide range of adult consumers. Patent document 2 does not specifically describe the disposal form of the diaper.

Documents of the prior art

Patent document

Patent document 1: U.S. patent application publication No. 2020/030164 specification

Patent document 2: U.S. patent application publication No. 2018/147097 specification

Disclosure of Invention

The present invention (first invention) is an absorbent article series including a plurality of absorbent articles having different sizes, the plurality of absorbent articles being divided into a plurality of size groups corresponding to the number of kinds of sizes thereof.

In one embodiment of the absorbent article series according to the present invention (first aspect), each of the plurality of absorbent articles includes: an absorber having a longitudinal direction corresponding to a front-rear direction of a wearer and a lateral direction orthogonal to the longitudinal direction, for absorbing and holding a body fluid; and a disposal tape which is fixed to the outer surface of the absorbent article and has stretchability.

In an embodiment of the absorbent article series of the present invention (first invention), regarding the compactness of swelling index of the absorbent article measured by the following method, the following size relationship holds between each other of at least a part of the size groups among the plurality of size groups: relatively small-sized size groups > relatively large-sized size groups.

< measurement of swelling compaction index >

The absorbent article to be measured was saturated with physiological saline in a measurement environment having an atmospheric temperature of 23 ± 2 ℃ and a relative humidity of 50 ± 5%, and then rolled up in the longitudinal direction with the inner surface of the absorbent article in an unfolded state as the inside, and the outer peripheral length C1 in the rolled-up direction was measured. Further, the disposal tape fixed to the outer surface of the rolled absorbent article was wound around the outer surface of the absorbent article in the rolling direction of the absorbent article in a state of being elongated to 50% of the elongation at break, and after leaving the absorbent article in this state for 20 minutes, the outer peripheral length C2 of the portion of the absorbent article around which the disposal tape was wound was measured. Then, the swelling compactness index of the absorbent article to be measured was calculated by the following formula.

Swelling compactness index ═ 1- (C2/C1)

The present invention (second invention) is an absorbent article series including a plurality of absorbent articles having different sizes, the plurality of absorbent articles being divided into a plurality of size groups corresponding to the number of kinds of sizes thereof.

In one embodiment of the absorbent article series according to the present invention (second invention), each of the plurality of absorbent articles includes: an absorber having a longitudinal direction corresponding to a front-rear direction of a wearer and a lateral direction orthogonal to the longitudinal direction, for absorbing and holding a body fluid; and a disposal tape which is fixed to the outer surface of the absorbent article and has stretchability.

In an embodiment of the absorbent article series of the present invention (second invention), regarding a package-winding index of the absorbent article measured by the following method, the following size relationship holds between each other in at least a part of the plurality of size groups: relatively small-sized size groups > relatively large-sized size groups.

< measuring method of winding packing index >

The absorbent article to be measured was saturated with physiological saline in a measurement environment having an atmospheric temperature of 23 ± 2 ℃ and a relative humidity of 50 ± 5%, and then rolled up in the longitudinal direction with the inner surface of the absorbent article in an unfolded state as the inside, and the outer peripheral length C1 in the rolled-up direction was measured. Further, the total length T50 in the extension direction of the disposal tape fixed to the outer surface of the absorbent article to be measured was measured when the disposal tape was extended to 50% of the elongation at break. Then, the wrapping packing index of the absorbent article to be measured is calculated by the following formula.

Winding packing index T50/C1

Other features, effects, and embodiments of the present invention are described below.

Drawings

Fig. 1 is a schematic perspective view of the back side portion of a pants-type disposable diaper as an embodiment of the absorbent article of the present invention.

Fig. 2 is an unfolded plan view schematically showing the inner surface side (skin-facing surface side, side on which the absorbent main body is disposed) of the diaper shown in fig. 1 in an unfolded and stretched state, partially cut.

Fig. 3 is a schematic developed plan view of the outer surface side (non-skin-facing surface side, non-disposition surface side of the absorbent main body) in a developed and extended state of the diaper shown in fig. 1.

Fig. 4 is a sectional view taken along the thickness direction of the diaper shown in fig. 2 at the line I-I, and is a schematic cross-sectional view of the crotch portion of the diaper shown in fig. 1.

FIG. 5 is a sectional view taken along line II-II in the thickness direction of FIG. 3, and is a schematic longitudinal sectional view of the diaper shown in FIG. 1 in an unused state with a disposal tape.

Fig. 6(a) is a perspective view schematically showing a state in which the disposal tape is extended in the process of forming the disposal form of the diaper shown in fig. 1.

Fig. 6(b) is a perspective view schematically showing a state in which the disposal tape is wound around the outer surface of the diaper in a rolled state.

Fig. 7 is a perspective view schematically showing an example of a package structure of an absorbent article as an embodiment of a size group included in an absorbent article series of the present invention, partially cut.

Fig. 8(a) is an explanatory diagram of the outer peripheral length C1 of the absorbent article in the method of measuring the wrapping index.

Fig. 8(b) is an explanatory view of the outer peripheral length C2 of the absorbent article in the measurement method of the swelling compaction index.

Fig. 9(a) is a schematic longitudinal sectional view along the thickness direction of an absorbent article (pants-type disposable diaper) taken out of the packaging structure shown in fig. 7.

Fig. 9(b) is a schematic longitudinal sectional view along the thickness direction when the absorbent article shown in fig. 9(a) is brought into an unfolded state.

Fig. 10 is an explanatory diagram of the relationship between the longitudinal length of the absorbent article and the longitudinal length of the disposal tape in the embodiment of the absorbent article of the present invention.

Fig. 11 is a schematic cross-sectional view along the transverse direction of a disposal form in which the diaper shown in fig. 1 is rolled up in the longitudinal direction and a disposal tape is wound up in the rolling direction, and corresponds to a schematic cross-sectional view of the disposal form of the diaper shown in fig. 6 (b).

Fig. 12(a) is a plan view schematically showing the structure of another embodiment of the absorbent article of the present invention.

Fig. 12(b) is a schematic cross-sectional view in the thickness direction of the diaper shown in fig. 12(a) in a waste form.

Detailed Description

In an absorbent article having a disposal tape, in a disposal form in which the disposal tape is wound around the outer surface after use, it is required that excrement such as urine and feces absorbed and held in an absorbent body of the absorbent article does not leak to the outside, and that disposal can be performed compactly and hygienically using the disposal tape. However, conventional absorbent articles have room for improvement in this point.

For example, an L-size product of a disposable diaper for infants is typically designed to have a weight of about 30 to 40g per 1 product and an absorption amount of excrement upon wearing is assumed to be about 100g, but in applications where the wearing time is relatively long, such as sleeping or going out, the absorption amount of excrement is often 200g or more and often 300g or more, and in the prior art, it is difficult to make a used diaper which swells greatly due to such long-time wearing small and to dispose of it compactly. Further, the smaller the size for the shorter months of age, the more the number of diaper changes per 1 day, that is, the number of discarded diapers, the more the diapers can be discarded, and it is desired that the diapers can be discarded compactly for each 1 diaper.

Further, for example, as the month age of an infant increases, the stool properties change and the viscosity tends to gradually increase, but when the month age of a wearer of a diaper is relatively high, the stool has high viscosity and is relatively easy to remove from the diaper surface, so that it is possible to flush the stool into a toilet without taking care from the hygienic aspect, and after the diaper is rolled up into a lump and a disposal tape is wound up to a disposal form after use, the stool is relatively less likely to leak out, but when the month age of a wearer of a diaper is low, many of the stools absorbed and held by the used diaper are highly fluid stools such as loose stools or loose stools, and therefore, it is difficult to remove the stool from the diaper surface, and when the diaper is rolled up without the stool adhering to the hand when the diaper is curled up, the diaper is rolled up and the disposal tape is not wound up firmly, feces may easily leak from the diaper in a waste form.

Conventional absorbent articles are not designed in consideration of differences in use, differences in stool properties accompanying the growth of the body of the wearer, and the like, and there is room for improvement in disposal form.

The present invention relates to an absorbent article series that can dispose of a used absorbent article compactly and hygienically regardless of the use or the change in the properties of excrement accompanying the growth of the body.

Hereinafter, the present invention will be described based on preferred embodiments thereof with reference to the accompanying drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. The drawings are schematic in nature, and the proportions of the dimensions and the like may sometimes be different from the reality.

The absorbent article array of the present invention includes a plurality of types of absorbent articles having at least 2 or more different sizes (sizes). The plurality of types of absorbent articles are partially or entirely the same except for the size, and the effects exerted by the absorbent articles are also the same. The phrase "partially identical" as used herein means that, for example, the basic structure or main structure of the absorbent article (for example, the absorbent body 2 in the diaper 1 described later) or a characteristic portion characterizing the absorbent article (for example, the absorbent body 23 in the diaper 1 described later) is identical in structure or composition, and other elements (except for the size) are different.

The absorbent article series of the present invention may have a common name (brand name) for a plurality of types of absorbent articles constituting the series. At this time, each of the plurality of types of absorbent articles is 1 of the line contents (lineup) of the group of articles sold under its common name. The common name is printed on the absorbent article or its packaging container, for example. As an example of a sales method of the absorbent article series of the present invention, there is a method in which at least 2 or more types of absorbent articles having common names are arranged in proximity to each other in a predetermined area of a retail store.

The "absorbent article" as referred to in the present invention includes a wide range of articles for absorbing body fluids (urine, loose stool, menstrual blood, sweat, etc.) discharged from the human body, and includes, for example, disposable diapers, sanitary napkins, sanitary pants, and the like. The present invention is applicable to any type of disposable diaper, including pants-type diapers in which a waist opening and leg openings are formed, and developed diapers in which these openings are not formed and a landing member is provided at a non-disposed portion (a flap portion) of an absorbent body.

A diaper 1 as one embodiment of an absorbent article included in the absorbent article series of the present invention is shown in fig. 1 to 4. Hereinafter, the absorbent article of the present invention will be described by taking the diaper 1 as an example.

The diaper 1 has a longitudinal direction X corresponding to the front-back direction of the wearer, i.e., the direction extending from the abdomen side to the back side through the crotch portion, and a transverse direction Y perpendicular to the longitudinal direction X. The diaper 1 is divided into 3 parts: a crotch portion B which is disposed in the crotch portion of the wearer and includes a discharge portion facing portion (not shown) facing a discharge portion such as a penis of the wearer; a stomach-side section a disposed closer to the stomach side (front side) of the wearer than the crotch section B; and a back portion C disposed on the back side (rear side) of the wearer with respect to the crotch portion B. The diaper 1 has an absorbent body 23 for absorbing and retaining body fluid and a disposal tape 4 having stretchability which is fixed to the outer surface (non-skin-facing surface) of the diaper 1. The disposal tape 4 is used when the diaper 1 is made into a disposal form.

The diaper 1 is a pants-type disposable diaper having side seals S in which both side edges along the longitudinal direction X of a front side portion a and a back side portion C are joined to each other, and includes an absorbent body 2 including an absorber 23, and an outer cover 11 disposed on the non-skin-facing surface side of the absorbent body 2. The absorbent body 2 and the exterior body 11 are bonded by an adhesive. The outer package 11 has an extension portion having a larger area than the absorbent body 2 and extending outward from the peripheral edge of the absorbent body 2. Of the extension portions of the outer covering 11 extending from the absorbent main body 2, the portions located outside the side edges 2S, 2S in the longitudinal direction X of the absorbent main body 2 and their imaginary extension lines in the transverse direction Y constitute a pair of

side wing portions

10, 10. The pair of side seals S, the waist opening WH, and the pair of leg openings LH, LH are formed by joining the pair of side flaps 10, 10 of the front and back sides a, C, respectively.

As shown in fig. 2 and 3, the diaper 1 is formed symmetrically on one side and the other side with respect to the transverse centerline CLy.

The stomach-side portion a is a part of the front body F of the diaper 1, and the back-side portion C is a part of the back body R of the diaper 1. The crotch portion B is formed from the front body F to the rear body R across the longitudinal center line CLx in the longitudinal direction X. Typically, the abdominal portion a and the back portion C each include a waist portion disposed on the waist of the wearer when the diaper 1 is worn. The waist portion includes a portion located at the same position as the side seal S in the longitudinal direction X (in the present embodiment, a rectangular region in plan view extending from the opening edge of the waist opening portion WH to the lower end Sb of the side seal S). Typically, the crotch portion B includes a region in which leg edge portions LS and LS are formed as narrowed portions for forming the leg opening portions LH and LH. The leg edge portions LS are portions of both side edge portions of the side flap portion 10 in the longitudinal direction X.

In the present invention, the stomach portion a, the crotch portion B, and the back portion C may be each region obtained by trisecting the diaper 1 in the longitudinal direction X in an unfolded and stretched state.

The transverse centerline CLy is an imaginary straight line that bisects the diaper 1 in the transverse direction Y and extends in the longitudinal direction X in the unfolded and extended state as shown in fig. 2 and 3. The longitudinal centerline CLx is an imaginary straight line that bisects the diaper 1 in the extended and stretched state in the longitudinal direction X and extends in the transverse direction Y.

The term "developed and stretched state" as used herein refers to a state in which the diaper 1 is cut at the side seals S to be developed, and the diaper 1 in this developed state is stretched to a state in which the elastic members of the respective portions are stretched to be a designed size (the same size as that when developed in a flat state with the influence of the elastic members completely eliminated).

In the present embodiment, as shown in fig. 2 and 3, the absorbent main body 2 has a rectangular shape in plan view, is disposed at the center portion in the lateral direction Y of the outer cover 11 so that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1, and extends in the longitudinal direction X from the stomach-side portion a to the back-side portion C via the crotch portion B. The outline of the absorbent body 2 in plan view substantially coincides with the outline of the absorber 23.

As shown in fig. 4, the absorbent body 2 is configured to include: a liquid-permeable front sheet 21 disposed at a position relatively close to the skin of the wearer; a liquid-impermeable, or water-repellent (in short, leakproof) back sheet 22 disposed at a position relatively distant from the skin of the wearer; and an absorber 23 interposed between the front sheet 21 and the back sheet 22. The absorber 23 includes: an absorbent core 24 capable of absorbing and holding body fluid; and a covering sheet 25 covering the outer surfaces of the skin-facing surface and the non-skin-facing surface including the absorbent core 24. These members constituting the absorbent main body 2 are integrated with each other by a known joining means such as an adhesive.

As the above-described members constituting the absorbent main body 2, members generally used in such absorbent articles can be used without particular limitation. For example, various nonwoven fabrics, apertured films, and the like can be used as the front sheet 21, and a resin film, a laminate sheet of a resin film and a nonwoven fabric, and the like can be used as the back sheet 22. Typically, the absorbent core 24 mainly includes a water-absorbent material, and the water-absorbent material includes 1 or more materials selected from a fibrous material such as wood pulp and a water-absorbent polymer. The core sheet 25 is liquid-permeable and typically made of paper, nonwoven fabric, or the like. The core-spun sheet 25 may also be absent.

In the present specification, the "skin-facing surface" is a surface facing the skin side of a wearer when the diaper is worn, that is, a surface relatively close to the skin of the wearer, among pants-type disposable diapers or their constituent members (e.g., absorbers), and the "non-skin-facing surface" is a surface facing the opposite side to the skin side when the diaper is worn, that is, a surface relatively far from the skin of the wearer, among pants-type disposable diapers or their constituent members. The term "worn" as used herein refers to a state in which a normal proper wearing position, that is, a proper wearing position of the absorbent article is maintained.

As shown in fig. 4, a pair of leakage preventing cuffs 3, 3 standing up toward the skin of the wearer when the diaper 1 is worn are provided on both side portions of the absorbent main body 2 in the longitudinal direction X. Each of the leak-proof cuffs 3 includes a liquid-resistant or water-repellent and air-permeable leak-proof sheet 30, one end side in the lateral direction Y of the leak-proof sheet 30 is fixed to another member (the absorbent main body 2 and the outer cover 11 described later in the illustrated embodiment) to form a fixed end portion, and the other end side in the lateral direction Y is not fixed to another member and forms a free end portion. The leakproof cuff forming elastic member 31 is fixed to the free end of the leakproof sheet 30 in a state of being extended in the longitudinal direction X, and is arranged to be stretchable in the direction. When the diaper 1 is worn, the free end portion side of the leakproof sheet 30 is erected toward the wearer side with the fixed end portion as the erected base end at least in the crotch portion B by the contractive force of the elastic member 31, and the pair of leakproof cuffs 3, 3 are erected, thereby preventing the excrement such as urine from flowing out to the outside in the transverse direction Y.

In the present embodiment, as shown in fig. 4, the exterior body 11 includes: an outer sheet 12 disposed on a side relatively distant from the skin of the wearer; and an inner sheet 13 disposed on a side relatively close to the skin of the wearer. The outer layer sheet 12 and the inner layer sheet 13 are joined to each other by joining means such as an adhesive agent to be integrated. The outer sheet 12 is the outermost layer of the outer package 11, and forms the non-skin-facing surface of the outer package 11 and the outer surface of the diaper 1. The inner layer sheet 13 is the innermost layer of the outer package 11 and forms the skin-facing surface of the outer package 11. The absorbent body 2 is joined to the skin-facing surface of the inner sheet 13.

As the outer layer sheet 12 and the inner layer sheet 13, nonwoven fabrics by various production methods, resin films, and the like can be used, and examples of the nonwoven fabrics include spun bond nonwoven fabrics, hot air nonwoven fabrics, needle punched nonwoven fabrics, and the like. The outer layer sheet 12 and the inner layer sheet 13 may have a single-layer structure, or may have a laminated structure in which 2 or more sheets are laminated. The outer layer sheet 12 and the inner layer sheet 13 may be stretchable sheets having stretchability in the transverse direction Y, or may be non-stretchable sheets having no stretchability.

In the present embodiment, leg gathers are formed in the leg edge LS that forms the opening edge of each of the pair of leg openings LH, LH. The leg gathers include an outer package 11 and a leg gather forming elastic member 15 fixed to the outer package 11 and having a portion extending along a leg edge LS. The leg gathers are produced by fixing the elastic member 15 in an extended state between the outer layer sheet 12 and the inner layer sheet 13 constituting the outer package 11, and then releasing the elastic member 15 from the extended state. In the natural state or worn state of the diaper 1, a plurality of gathers (gathers) extending in a direction intersecting the contraction direction of the elastic member 15 are formed in the portion of the outer body 11 constituting the opening edge of the leg opening LH by contraction of the elastic member 15, whereby the above-mentioned leg gathers in a ring shape in which the gathers are substantially continuous are formed over the entire circumference of the opening edge of the leg opening LH.

As shown in fig. 2 and 3, the side flap portions 10 of the front side portion a and the back side portion C each have an expansion/contraction region G having expansion/contraction properties in the lateral direction Y. The stretch region G includes a sheet forming the wing portion 10 and a plurality of elastic members 14 arranged in the sheet so as to be stretchable in the lateral direction Y. The plurality of elastic members 14 extend in the transverse direction Y and are arranged at intervals in the longitudinal direction X. In the present embodiment, the stretch regions G are located in the waistline portion (the portion located at the same position as the side seal portion S in the longitudinal direction X), and the elastic members 14 can be referred to as waistline elastic members.

In the present embodiment, the "sheet forming the wing portion 10" described above includes the outer layer sheet 12 and the inner layer sheet 13. The stretch/contraction region G is produced by fixing the elastic member 14 between the outer layer sheet 12 and the inner layer sheet 13 in a state where the elastic member 14 is stretched in the transverse direction Y, and then releasing the elastic member 14 from the stretched state. In the worn state of the diaper 1, a plurality of gathers extending in the direction (longitudinal direction X) intersecting the elastic members 14 are formed on the surface of the stretch region G by contraction of the elastic members 14.

In the present embodiment, as shown in fig. 2 and 3, the entire portion of each of the front side portion a and the back side portion C which is located at the same position as the side seal portion S in the longitudinal direction X and does not overlap with the absorbent main body 2 (absorbent body 23) in a plan view is the stretchable region G. The elastic member 14 disposed in a portion overlapping the absorbent main body 2 in a plan view of the diaper 1 is cut or the like and is treated so as not to exhibit elastic stretchability, and therefore the portion does not have stretchability in the lateral direction Y.

In the present embodiment, the stretchable zone G includes an upper stretchable zone G1 located on the waist opening WH side and a lower stretchable zone G2 located on the crotch portion B side, with the longitudinal end 2E of the absorbent main body 2 and an imaginary extension thereof being defined as a boundary.

The upper stretch region G1 includes an opening peripheral edge portion of the waist opening WH, and is disposed around the waist (waist) of the wearer when the diaper 1 is worn. In the developed and extended state of the diaper 1 shown in fig. 2 and 3, the length in the longitudinal direction X of the upper stretch region G1 is preferably 10% or more, more preferably 20% or more, and preferably 70% or less, more preferably 50% or less, with respect to the length in the longitudinal direction X of the side seal S.

The lower stretchable zone G2 is provided in a pair on both sides in the transverse direction Y across the absorbent body 2 between the longitudinal end 2E of the absorbent body 2 and an imaginary extension thereof and the lower end Sb of the side seal S (the end of the side seal S that is relatively close to the longitudinal centerline CLx at both ends in the longitudinal direction X).

The absorbent article of the present invention has a disposal tape having stretchability which is fixed to the outer surface of the absorbent article. The disposal tape of the present invention is not particularly limited in its structure and arrangement position on the premise of the following explanation of the winding packing index and the swelling compaction index. For example, the disposal tape of the present invention may be provided to be stretchable in the longitudinal direction from the fixing portion to the outer surface of the absorbent article, or may be stretchable in the transverse direction. In the present embodiment, the former is adopted as described later. In the latter case, typically, in the diaper 1, the disposal tape 4 is fixed to the outer surface of at least one stretch region G (the upper stretch region G1 and/or the lower stretch region G2) of the pair of

wing portions

10, 10 of the back portion C.

In the present embodiment, as shown in fig. 1 to 3, the disposal tape 4 is provided on the outer surface of the back portion C of the diaper 1 (the non-skin-facing surface of the outer sheet 12). The disposal tape 4 is disposed in 1 piece at the center portion in the lateral direction Y of the back portion C, and overlaps the absorbent body 23 (absorbent main body 2) in plan view, not the stretch region G.

The disposal tape 4 is formed in a tape shape long in one direction, and is provided on the outer surface of the diaper 1 so that the longitudinal direction thereof coincides with the longitudinal direction X when the disposal tape 4 is used. That is, the disposal tape 4 is provided so as to be stretchable in the longitudinal direction X from the fixing portion to the outer surface of the diaper 1.

Fig. 5 shows a cross-sectional structure of the waste tape 4 in the thickness direction in the longitudinal direction X in an unused state. The disposal tape 4 is folded over the outer surface of the diaper 1 (the non-skin-facing surface of the outer sheet 12) when not in use.

In the present embodiment, the disposal tape 4 includes a fixed portion 5 fixed to the outer surface of the diaper 1 and a free portion 6 extending outward in the longitudinal direction X (the direction indicated by reference numeral X1 in fig. 5) from the fixed portion 5, and the free portion 6 includes a fastening portion 7 fastenable to the outer surface of the diaper 1 and an extensible portion 8 located between the fixed portion 5 and the fastening portion 7.

The fastening portion 7 is a portion that forms the distal end portion of the disposal tape 4, can be fastened to any position on the outer surface of the diaper 1, and is fastened to the outer surface of the diaper 1 when the disposal form of the diaper 1 is maintained by the disposal tape 4. The fastening portion 7 has a fastening structure for fastening to the outer surface of the diaper 1, and the fastening structure is not particularly limited, and a member used as a fastening means in the present technical field, such as an adhesive, or a hook member, can be appropriately used.

The stretchable portion 8 is a portion that can be easily stretched by a relatively weak stretching force when a stretching force is applied to the disposal tape 4, and increases the length of the disposal tape 4. The stretchable section 8 is stretchable in the longitudinal direction X as well as being stretchable in the longitudinal direction X. The term "stretchable" as used herein means to be elongated when a stretching force is applied to the waste tape 4 and to be contracted when the stretching force is released.

The disposal tape 4 in the folded state is in a three-folded state in which the fixing portion 5, the stretchable portion 8, and the fastening portion 7 are sequentially laminated on the outer surface of the diaper 1. In fig. 5, for convenience of explanation, gaps are described between the fixed portion 5 and the stretchable portion 8 and between the stretchable portion 8 and the fixed portion 7, but the actual disposal tape is not limited to having such gaps.

In the present embodiment, the fixing portion 5 of the disposal tape 4 has a fixing portion sheet 50. The fixing section sheet 50 has a first surface 50a and a second surface 50 b. In the disposal tape 4 in a folded state, the first surface 50a of the fixing portion sheet 50 faces the stretchable portion 8 and the second surface 50b faces the outer surface of the diaper 1 except for a folded portion 50' described later. The fixing portion 5 has a fixing portion adhesive portion 51. The fixing portion adhesive portion 51 is provided on the second surface 50b of the fixing portion sheet 50. The fastening portion 5 is fastened to the outer surface of the back side portion C of the diaper 1 by a fastening portion adhesive portion 51. The disposal tape 4 is fixed to the outer surface of the back portion C of the diaper 1 via the fixing portion adhesive portion 51 so as not to be attachable and detachable. As a method of fixing the disposal tape 4 to the outer surface of the diaper 1, a known method such as an adhesive such as a hot-melt adhesive or welding can be used.

In the present embodiment, the stretchable portion 8 of the disposal tape 4 has a stretchable portion sheet 80. The length in the longitudinal direction (length in the longitudinal direction X) of the stretchable section sheet 80 may be the same as or different from the length in the longitudinal direction (length in the longitudinal direction X) of the fixing section sheet 50. The width (length in the lateral direction Y) of the stretchable section sheet 80 may be the same as or different from the width (length in the lateral direction Y) of the fixing section sheet 50. The stretch panel 80 has a first surface 80a and a second surface 80 b. In the disposal tape 4 in the folded state, the stretchable section sheet 80 has a first surface 80a facing the fastening section 7 and a second surface 80b facing the fixing section 5, except for a folded section 80' described later. The stretchable part 8 has a stretchable part adhesive part 81. The stretchable adhesive portion 81 is provided on the second surface 80b of the stretchable sheet 80. The stretchable adhesive portion 81 detachably joins the stretchable portion 8 and the fixed portion 5 of the folded waste tape 4. Therefore, the pressure-sensitive adhesive portion 81 for the expansion/contraction portion is preferably made of a low-pressure-sensitive adhesive.

The fixing portion sheet 50 of the fixing portion 5 has a folded portion 50' in which one end in the longitudinal direction (outer end in the longitudinal direction X) is folded back toward the stretchable portion 8. The folded portion 50' is joined to one end (outer end in the longitudinal direction X) in the longitudinal direction of the stretch portion sheet 80 of the stretch portion 8 on the second surface 80b side. Thereby, the fixed portion 5 and the stretchable portion 8 are provided in direct contact with each other. As a method of connecting the fixing portion 5 and the stretchable portion 8, a known method such as an adhesive such as a hot-melt adhesive or welding can be used.

In the present embodiment, the fastening portion 7 of the disposal tape 4 includes a fastening portion sheet 70. The length in the longitudinal direction (length in the longitudinal direction X) of the fastening section sheet 70 may be the same as or different from the length in the longitudinal direction (length in the longitudinal direction X) of the fastening section sheet 50 or the stretchable section sheet 80. The width (length in the lateral direction Y) of the fastening section sheet 70 may be the same as or different from the width (length in the lateral direction Y) of the fixing section sheet 50 or the stretchable section sheet 80. The fastening section sheet 70 has a first surface 70a and a second surface 70 b. In the disposal tape 4 in the folded state, the second surface 70b of the fastening section sheet 70 faces the stretchable section 8. The fixing portion 7 has a fixing portion adhesive portion 71. The fastening portion adhesive portion 71 is provided on the second surface 70b of the fastening portion sheet 70. The fastening portion bonding portion 71 detachably joins the fastening portion 7 of the folded waste tape 4 and the stretchable portion 8, and fastens the fastening portion 7 to an appropriate portion of the outer surface of the diaper 1. From this viewpoint, the degree of adhesiveness of the adhesive portion 71 for a fastening portion is preferably determined.

One end (inner end in the longitudinal direction X) in the longitudinal direction of the stretchable section sheet 80 in the stretchable section 8 is folded back toward the fixed section 7 to form a folded-back section 80'. The folded-back portion 80' is joined to one end (inner end in the longitudinal direction X) in the longitudinal direction of the fastening portion sheet 70 of the fastening portion 7 on the second surface 70b side. Thereby, the expansion/contraction portion 8 is provided so as to be directly connected to the fixing portion 7. As a method of providing the stretchable portion 8 and the fastening portion 7 in a continuous manner, a known method such as an adhesive such as a hot-melt adhesive or welding can be used. Further, a grip piece 72 is joined to the second surface 70b side at the other end of the fixing section sheet 70 of the fixing section 7. The grip piece 72 is a sheet material separate from the fixing portion piece 70.

Since the stretchable part 8 is stretchable, an appropriate material may be selected as the stretchable part sheet 80 constituting the stretchable part 8. Specifically, as a constituent material of the sheet 80 for the stretchable portion, for example, a stretchable film can be used. Examples of such a film include multilayer films such as a monolayer film and a coextruded film. As a material constituting the stretchable film, for example, polyolefin such as linear low density polyethylene is preferably used. In addition, also preferably used from polyvinyl chloride, ethylene-vinyl acetate copolymer and polyvinyl alcohol in at least 1 material. Furthermore, it is also advantageous to use a material having a permanent set of at least 50%, more preferably at least 70%.

As the fixing portion sheet 50 constituting the fixing portion 5, the same material as the constituent material of the stretchable portion sheet 80 may be used, or any material that is not stretchable, that is, is not plastically deformable may be used. For example, a known sheet conventionally used for a resin sheet (plastic sheet, film, etc.), a nonwoven fabric, or a woven fabric can be used without particular limitation. Even if the constituent material of the fixing section sheet 50 is stretchable, the stretchability is not exhibited in the portion fixed to the non-skin-facing surface of the diaper 1.

As the stretchable portion adhesive portion 81 for releasably joining the stretchable portion 8 and the fixing portion 5 and the fastening portion adhesive portion 71 for releasably joining the fastening portion 7 and the stretchable portion 8, for example, a rubber-based adhesive and an acrylic-based adhesive are generally used, and a rubber-based adhesive is preferably used. Examples of the rubber-based adhesive include synthetic rubbers such as styrene-butadiene block copolymers and hydrogenated styrene-butadiene block copolymers, and blends of these synthetic rubbers and resins. Further, an adhesive agent composed of heat sealing, a hot melt adhesive agent, a melt-blown or fibrous adhesive agent, an adhesive agent, or the like may be used.

The stretchable portion adhesive portion 81 and the fastening portion adhesive portion 71 may be formed on the entire second surface 80b of the stretchable portion sheet 80. The

adhesive portions

81 and 71 may be formed at intervals. In this case, the adhesive agent is applied at intervals, whereby the

adhesive portions

81 and 71 can be formed at intervals.

The waste tape 4 can be manufactured as follows: the fixing portion sheet 50 is partially laminated on one end portion in the longitudinal direction of the stretchable portion sheet 80, the fastening portion sheet 70 is partially laminated on the other end portion in the longitudinal direction of the stretchable portion sheet 80, and the laminated portions are joined and integrated by a known method such as an adhesive.

As described above, the disposal tape 4 including the 3 locations of the fixing portion 5, the stretchable portion 8, and the fastening portion 7 is folded in the longitudinal direction (the longitudinal direction X) in a cross-sectional view along the thickness direction in the longitudinal direction X shown in fig. 5, and is formed in a zigzag shape by being folded in three in the present embodiment. The disposal tape 4 is provided on the outer surface of the central portion in the lateral direction Y of the portion located at the same position as the side seal S in the longitudinal direction X of the back portion C so that the tip of the fastening portion 7 (the grip piece 72) located at the uppermost portion of the disposal tape 4 in the folded state faces the outside in the longitudinal direction X (the direction indicated by the symbol X1 in fig. 5), that is, the opposite side to the center in the longitudinal direction X of the diaper 1 (the longitudinal center line CLx), and the free portion 6 including the stretchable portion 8 and the fastening portion 7 can be extended outward in the longitudinal direction X from the fixing portion 5 by gripping the tip of the fastening portion 7 with fingers and the like and stretching outward in the longitudinal direction X.

The stretchable portion 8 is stretchable in the longitudinal direction (longitudinal direction X) of the disposal tape 4 in an unfolded state of a folded state. More specifically, the portion of the stretchable section sheet 80 other than the both end portions joined to the fixing section sheet 50 or the fastening section sheet 70 can be stretched in the longitudinal direction. Here, the unfolded state of the folded state refers to a state in which the respective portions of the waste tape 4 that are in contact with each other in the waste tape 4 of the folded state are separated from each other, and the waste tape 4 is unfolded linearly. For example, the three-folded state of the developed state shown in fig. 5 is a state in which the stretchable portion 8 and the fixed portion 5 of the disposal tape 4 are separated from each other, and the stretchable portion 8 and the fixed portion 7 are separated from each other, and the disposal tape 4 in the three-folded state is developed linearly. In the expanded state, the disposal tape 4 can be pulled by human power, and at this time, the stretchable portion 8 can be stretched.

Typically, as shown in fig. 6, the diaper 1 in which the side seal S is torn off and is in a developed state (a state in which the front body portion F and the rear body portion R do not overlap) is rolled up in the longitudinal direction X from the front side portion a side toward the back side portion C side (the disposition side of the disposal tape 4) with the inner surface (the skin-facing surface, the disposition surface of the absorbent body 2) being the inner side, so that the diaper 1 is in a rolled-up state, and the disposal tape 4 is rolled up around the diaper 1 in the rolled-up direction (the longitudinal direction X) of the diaper 1, thereby forming a disposal form of the diaper 1. In this case, before the diaper 1 is rolled up, the side flap portions 10 may be folded toward the absorbent main body 2 with the inner surface of the diaper 1 as the inner side.

As another example of the method of rolling up the diaper 1, there is a method of rolling up the diaper 1 in the longitudinal direction X from the crotch portion B to the waist opening portion WH side (the disposition side of the disposal tape 4) with the front body portion F being the inside, in a state where the front body portion F and the rear body portion R are overlapped with each other with the disposition surface of the absorbent main body 2 being the inside. In this case, before the diaper 1 is rolled up, the side flap portions 10 may be folded toward the absorbent main body 2 with the abdominal portion a as the inner side.

In the embodiment shown in fig. 6, the disposal tape 4 is wound around the central portion of the diaper 1 in the lateral direction Y (the direction orthogonal to the rolling direction of the diaper 1) in a rolled state, and the fastening portion 7 of the disposal tape 4 is fastened to the fixing portion 5 of the disposal tape 4 (that is, the disposal tape 4 is wound around the diaper 1 in the longitudinal direction X in a rolled state in one turn in the rolling direction), but in the present invention, the winding position of the disposal tape 4 and the fastening position of the fastening portion 7 are not particularly limited, and any position may be selected.

The absorbent article array of the present invention includes a plurality of absorbent articles having different sizes, and the plurality of absorbent articles are divided into a plurality of size groups corresponding to the number of types of sizes.

For example, when the absorbent article array of the present invention includes a plurality of 3 kinds of disposable diapers S-size, M-size, and L-size in descending order of size, the plurality of disposable diapers are divided into a plurality of size groups corresponding to 3 kinds of sizes, that is, 3 size groups S-size, M-size, and L-size groups.

In the present invention, the "size of the absorbent article" refers to the entire length in the longitudinal direction of the absorbent article saturated with physiological saline in a non-stressed (non-external-force-applied) unfolded and non-stretched state. The "size difference" in the present invention means that the sizes (the entire length in the longitudinal direction) defined as such are different from each other between the absorbent articles to be compared. For example, in the case of commercially available diapers for infants, diapers of different sizes corresponding to the months of age of infants are generally prepared. Infants and young children of the elderly are generally used large diapers, and the larger the diaper, the larger the saturated absorption capacity of physiological saline is. Therefore, the "size of the absorbent article" described above is generally larger as the diaper becomes larger for a longer month.

The "absorbent article saturated with physiological saline" is obtained by immersing an absorbent article in a developed state, in the case of the diaper 1, in physiological saline in an environment where the ambient temperature is 23 ± 2 ℃ and the relative humidity is 50 ± 5%, in a state where the side seals S are peeled off and developed.

The "unfolded and non-extended state" refers to a state in which the absorbent article saturated and absorbed with physiological saline is unfolded such that the front body and the back body do not overlap, and the elastic members of the respective portions of the absorbent article are in a non-extended state (natural state). In the case of the diaper 1, the side seals S are peeled off and the elastic members of the respective portions are developed into a flat state without being stretched, and the developed state is a non-stretched state.

In the present embodiment, as shown in fig. 7, each of the plurality of size groups includes a packaging structure 17 of a disposable diaper (absorbent article), and the packaging structure 17 includes a plurality of diapers 1 and a packaging container 16 that accommodates the plurality of diapers 1 therein. Each of the plurality of size groups may be an aggregate of the plurality of package structures 17. The plurality of diapers 1 in the packaging container 16 are identical to each other, and are not only identical in composition or configuration but also identical in size.

The plurality of diapers 1 are stored inside the packaging container 16 in a folded state. In the present embodiment, the diapers 1 inside the packaging container 16 are each folded in two in the longitudinal direction X with the stomach-side portion a as the inside. The plurality of diapers 1 in the folded state are stacked in one direction to form a stack, and the stack is stored in the packaging container 16 in a state in which a plurality of diapers are stacked in the height direction of the packaging structure 17 and compressed integrally.

The packaging container 16 is not particularly limited in material and structure as long as it can contain a plurality of diapers 1. In the present embodiment, the packaging container 16 is a packaging bag made of a flexible sheet material. The packaging container 16 can be printed with a so-called brand name, which is the aforementioned "name common to the plurality of types of absorbent articles constituting the absorbent article series".

The absorbent article array of the present invention includes the following first and second inventions.

The first invention: regarding the swelling compactness index of the absorbent article measured by the following method, the following magnitude relationship holds between at least a part of the size groups among the plurality of size groups: "size group of relatively small size > size group of relatively large size".

Second invention: regarding the roll packing index of the absorbent article measured by the following method, the following magnitude relationship holds between at least a part of the size groups among the plurality of size groups: "size group of relatively small size > size group of relatively large size".

The swelling compactness index used in the first invention is an index of the shrinkage rate of the wound portion of the waste tape 4 in the diaper 1 when the diaper 1 saturated and absorbing excreta and in a swollen state is rolled up in the longitudinal direction X to be rolled up into a mass, and the waste tape 4 extended to 50% of the elongation at break is wound up on the outer surface of the diaper 1 in the mass rolled up, in the rolling direction of the diaper 1. The larger the value of the swelling compactness index is, the more easily the outer diameter of the absorbent article in the disposal form formed by rolling up the absorbent article in the longitudinal direction is made smaller, and the disposal form of the absorbent article having the larger swelling compactness index becomes relatively compact.

The winding packing index used in the second invention is the ratio of the total length T50 at 50% elongation of the breaking elongation of the disposal tape 4 to the outer circumferential length C1 (see fig. 8(a)) of the diaper 1 in the winding direction when the diaper 1 in a swollen state in which the diaper 1 is saturated and absorbs excrement is rolled up in the longitudinal direction X and is rolled up into a mass, and can be an index of how much the disposal form of the diaper 1 after use is a sanitary disposal shape with high leakage resistance for loose feces. The larger the value of the winding baling index is, the longer the length of the disposal tape 4 in the extension direction relative to the outer circumferential length C1 of the diaper 1 in the winding direction is, and therefore, the fastening effect of the disposal tape 4 on the diaper 1 is easily enhanced. Therefore, the absorbent article having a large wrapping and packing index can prevent leakage of feces and can provide a sanitary disposal shape.

< measurement of swelling compaction index >

An absorbent article (e.g., diaper 1) to be measured is saturated with physiological saline in an environment where the ambient temperature is 23 ± 2 ℃ and the relative humidity is 50 ± 5%, and then the absorbent article is rolled up in the longitudinal direction with the inner surface of the absorbent article in an unfolded state as the inside, and the outer circumferential length C1 in the rolled-up direction is measured (see fig. 8(a)) (step 1).

In addition, in a state where the disposal tape (for example, the disposal tape 4 of the diaper 1) fixed to the outer surface of the rolled absorbent article is extended to 50% of the elongation at break (that is, in a state where the entire length in the extension direction is extended so as to be T50), the disposal tape is wound around the outer surface of the absorbent article in the rolling direction of the absorbent article, and after leaving this state for 20 minutes, the outer circumferential length C2 of the portion of the absorbent article around which the disposal tape is wound is measured (see fig. 8(b)) (step 2).

Then, the swelling compactness index of the absorbent article to be measured was calculated by the following formula.

Swelling compactness index ═ 1- (C2/C1)

In the step 1, the saturated absorption treatment of the physiological saline can be performed, for example, by immersing the absorbent article in a developed state in the physiological saline stored in the container in a state where the inner surface (skin-facing surface) side of the absorbent article faces downward for 30 minutes in an environment where the ambient temperature is 23 ± 2 ℃ and the relative humidity is 50 ± 5%, taking out the absorbent article from the physiological saline, and leaving the absorbent article in a suspended state for 30 minutes in an environment at normal temperature and normal pressure. The absorbent article placed in a suspended state for 30 minutes can be regarded as saturated with physiological saline. The diaper 1 is a pants-type disposable diaper, and therefore the side seals S are peeled off when the diaper is set in an unfolded state. When an absorbent article taken out of physiological saline is hung, the absorbent article is hung in a state of being folded in half in the longitudinal direction.

In step 1, the absorbent article saturated with the physiological saline is rolled up so that the mass of the rolled absorbent article exceeds 99 mass% of the mass of the absorbent article before rolling up. That is, the external force applied to the absorbent article by the rolling operation is reduced as much as possible, and the amount of the physiological saline leaking to the outside by the rolling operation of the absorbent article is attempted to be less than 1 mass% of the saturated absorption amount.

In step 1, the measurement point of the outer peripheral length C1 of the absorbent article in the longitudinally rolled state is set to a point including the fixed position of the disposal tape in the absorbent article. For example, in a state where the diaper 1 is rolled up in the longitudinal direction X, the fixed position of the disposal tape 4 (the position of the fixing portion 5) in the diaper 1 is the central portion in the lateral direction Y of the diaper 1, and therefore the measurement portion of the outer peripheral length C1 is the central portion in the lateral direction Y of the diaper 1.

The reason why the disposal tape is not immediately wound around the outer surface of the absorbent article and then the outer peripheral length C2 is not measured in step 2 is to stabilize the outer peripheral length C2 by leaving the disposal tape wound for 20 minutes. That is, the outer peripheral length C2 is unstable and changes for a certain period of time after the disposal tape is wound around the outer surface of the absorbent article in a state saturated with physiological saline, because the sheet such as nonwoven fabric forming the outer surface of the absorbent article slips due to the stretching stress of the disposal tape, or the water-absorbent polymer in the absorbent body of the absorbent article deforms. Therefore, in the step 2, 20 minutes was used as the time required for stabilizing the outer peripheral length C2, and the outer peripheral length C2 was measured after 20 minutes had elapsed from the winding of the waste tape.

< measuring method of winding packing index >

An absorbent article (e.g., diaper 1) to be measured is saturated with physiological saline in a measurement environment having an atmospheric temperature of 23 ± 2 ℃ and a relative humidity of 50 ± 5%, and then the absorbent article is rolled up in the longitudinal direction with the inner surface of the absorbent article in an unfolded state as the inside, and the outer circumferential length C1 in the rolling direction thereof is measured (see fig. 8(a)) (step 1). This step 1 is the same as the step 1 of the < measurement method of swelling compaction index > described above.

Further, the total length T50 in the extension direction of the disposal tape (for example, the disposal tape 4 included in the diaper 1) fixed to the outer surface of the absorbent article to be measured when the disposal tape is extended to 50% of the elongation at break is measured (step 3).

Then, the wrapping packing index of the absorbent article to be measured is calculated by the following formula.

Winding packing index T50/C1

In the above step 3, the total length T50 of the waste tape in the elongation direction can be measured by the following < tensile test >.

< tensile test > (method of measuring full length at 50% elongation of elongation at break of waste tape (T50))

This test was performed in an environment where the atmospheric temperature was 23 ± 2 ℃ and the relative humidity was 50 ± 5% in a state where the disposal tape to be measured was fixed to the absorbent article without being removed from the absorbent article. Taking a case where the total length T50 in the extension direction of the disposal tape 4 of the diaper 1 is measured, first, only the stretchable section 8 of the disposal tape 4 is set so that the longitudinal direction thereof coincides with the extension direction between a pair of chucks of a Tensilon tensile tester (product name "Autograph AG-X", manufactured by shimadzu corporation). At this time, in the tensile test, a commercially available adhesive tape is bonded to the other portions (the fixing portion 5, the fastening portion 7, and the like) of the disposal tape 4 other than the stretchable portion 8 so as not to be plastically deformed, and the other portions are reinforced. Subsequently, the distance between the chucks was increased at a constant speed (300 mm/sec) to extend the stretchable section 8, and the distance between the chucks at the time of breaking the stretchable section 8 was measured. Then, the breaking extension of the stretchable portion 8 is calculated by subtracting the distance between chucks (initial distance between chucks) before the stretching of the stretchable portion 8 is started from the distance between chucks at the time of breaking of the stretchable portion 8. The total length T50 in the extension direction of the disposal tape 4 is obtained by adding the extension of 50% of the breaking extension of the extensible part 8 and the total length (length from the fixing part 5 to the fastening part 7) in the longitudinal direction (longitudinal direction X) of the disposal tape 4 in the natural state (non-extended state) and in the unfolded state (unfolded state).

Since the total number of size groups included in the absorbent article array of the present invention is 2 or more, the above-described "swelling compactness index or winding and packing index of the absorbent article" size relationship between a relatively small size group > a relatively large size group "(hereinafter, also referred to as" exponential size relationship ") is satisfied not only between 2 size groups but also between 3 or more size groups.

Hereinafter, the present invention will be described with reference to the case where the total number of size groups included in the absorbent article array of the present invention is "n" and the total number of size groups is "n".

For example, when "n" is 2, "the size-size relationship of" first group < second group "is established between the 2 groups when the size group of the 2 size groups having a relatively small size (the group of the size groups included in the series having the smallest size of the absorbent articles) is set as the" first group, "and the size group of the size group having a relatively large size (the group of the size groups included in the series having the largest size of the absorbent articles) is set as the" second group. In this case, 1 exponential size relationship of "first group > second group" holds.

In the present invention, when the total number n of size groups is 2 as described above, "the total number of size groups is the number of size groups that constitute 1 exponential size relationship".

In addition, in the case of "n ≧ 3", the dimensional size relationship of "the first group < … … < the (n-1) th group < the n-th group" among the 3 or more dimensional groups holds. In such a size-size relationship, when "n" is 3 ", there is no other size group between the first group and the (n-1) -th group, and when" n ≧ 4 ", there is another size group to which serial numbers from 2 to the first 1 of (n-1) are assigned, respectively, according to the total number n of size groups, such as the second group, the third group, the fourth group, and … …. The "first group" is a group of the smallest size of the absorbent articles in the size group included in the series, and the "nth group" is a group of the largest size of the absorbent articles in the size group included in the series. In addition, if the group sandwiched by the 2 groups, that is, for example, the second group, the third group, and the fourth group [ ═ th (n-1) th group ] are each larger in size than the first group, the absorbent article is smaller in size than the fifth group [ ═ nth group ].

For example, in the absorbent article series, when 3 groups of a first group (for example, a group of S-sized absorbent articles), a second group (for example, a group of M-sized absorbent articles), and a third group (for example, a group of L-sized absorbent articles) are included in order of size from small to large as the size groups, that is, when the size relationship "first group < second group < third group" holds, the total number n of size groups is 3. In this way, in the case where n.gtoreq.3, in the present invention, there may be the following: 1) a manner in which the index size relationship is established only in a part of the plurality of size groups, that is, if the above example is employed, there is a manner in which "first group > second group > third group" or "first group > second group" is established; and 2) the manner in which 1 exponential magnitude relationship holds in all of the plurality of size groups, that is, the manner in which 1 magnitude relationship holds in "first group > second group > third group" in the case of the above example. In the above aspect 2), "the total number of size groups (3 in the above example) is the number of size groups (3 in the above example) constituting 1 exponential size relationship. In contrast, in the aspect 1) above, the number of the exponential size relationships established in 1 absorbent article series is 1 or more, and "the total number of size groups (3 in the above example) > the number of size groups (2 in the above example) constituting 1 exponential size relationship" is.

Hereinafter, the mode of the above-described 1), that is, the mode in which the relationship of "the total number of size groups > the number of size groups constituting 1 exponential size relationship" is established is referred to as "the first specific mode", and the mode of the above-described 2), that is, the mode in which the relationship of "the total number of size groups equals the number of size groups constituting 1 exponential size relationship" is established is referred to as "the second specific mode".

In general, the size of the absorbent article is prepared to match the age and shape of the wearer. For example, in the case where the absorbent article array includes 4 kinds of disposable diapers of S size, M size, L size, and Big size in order of size from small to large, the total number n of size groups is 4, and the size-size relationship of "S-size group (first group) < M-size group (second group) < L-size group (third group, M-1 group) < Big size group (fourth group, M-group)" holds.

Here, in the first specific mode, for example, 2 index size relationships of "S-size group (first group) > M-size group (second group)" and "L-size group (third group) > Big-size group (fourth group)" hold true for the swelling compactness index (first invention) or the winding packing index (second invention), but in the relationship between the M-size group (second group) and the L-size group (third group), the swelling compactness index or the winding packing index may be the same as each other, and the index size relationship does not hold. In this case, the number of exponential-size relationships established in the 1-absorbent-article series is 2. In addition, the total number n of size groups is 4, and the number of size groups constituting 1 exponential size relationship ("S-size group > M-size group" or "L-size group > Big-size group") is 2.

On the other hand, in the second specific mode, an exponential magnitude relation of "S-size group (first group) > M-size group (second group) > L-size group (third group) > Big-size group (fourth group)" holds for the swelling compaction index (first invention) or the winding packing index (second invention). In this case, the number of exponential magnitude relationships established in the 1-absorbent article series is 1. The total number n of size groups is 4, and the number of size groups constituting 1 exponential size relationship is also 4.

The first and second inventions each include a plurality of absorbent articles having different sizes, and the plurality of absorbent articles are divided into a plurality of size groups corresponding to the number of types of sizes, thereby achieving a full product array, and therefore, it is possible to make wearers having various body shapes enjoy the absorbent article series of the invention in various uses (for example, daytime use, night use, outdoor use, and the like) and in a relatively long period of time along with the growth of the body.

Further, with respect to the swelling compact index of the absorbent article, the size relationship of "relatively small size group > relatively large size group" holds (the first invention) or with respect to the winding packing index of the absorbent article, the size relationship of "relatively small size group > relatively large size group" holds (the second invention), that is, the size relationship of the absorbent article is opposite to the size relationship (the exponential size relationship) of the swelling compact index (the first invention) or the winding packing index (the second invention), between at least some of the size groups among the plurality of size groups, and therefore, the used absorbent article swollen by the absorption of the excrement can be compactly and hygienically discarded using the disposal tape provided in the absorbent article.

That is, the absorbent article series of the present invention can dispose of the used absorbent article compactly and hygienically regardless of the use and the change in the properties of excrement accompanying the growth of the body.

In the second invention, from the viewpoint of more reliably exhibiting the above-described effects, it is preferable that a size relationship of "a size group having a relatively small size > a size group having a relatively large size" is satisfied in an index size relationship, that is, a size relationship of "a size group having a relatively small size > a size group having a relatively large size" with respect to the winding and packing index of the absorbent article. That is, in the size relationship of the wraparound packing index of the absorbent article, the wraparound packing index of the absorbent article is preferably 0.6 or more for each of the plurality of size groups constituting the size relationship.

In each of the first and second aspects of the invention, the size of the absorbent article in each of the plurality of size groups included in the absorbent article series is not particularly limited on the premise that the above-described exponential size relationship is established between at least some of the plurality of size groups, and can be appropriately set according to the application of the absorbent article, and the like.

For example, in the case where the absorbent article array is an absorbent article for infants (ages 0 to 4 years) and the number of size groups constituting 1 exponential size relationship is 2 (the total number of size groups is 2), it is preferable that the size of each of the absorbent articles of the first group (size group having a relatively small size) and the second group (size group having a relatively large size), that is, "the longitudinal entire length under non-stress of the absorbent article in a developed and non-stretched state saturated with physiological saline" (hereinafter, sometimes simply referred to as "the longitudinal entire length under non-stress of the absorbent article") is in the following range.

The overall length in the longitudinal direction of the absorbent article of the first group under non-stress is preferably 200mm or more, more preferably 250mm or more, and preferably 400mm or less, more preferably 350mm or less.

The absorbent articles of the second group preferably have a longitudinal overall length of 250mm or more, more preferably 300mm or more, and preferably 450mm or less, more preferably 400mm or less, in a non-stressed state.

In addition, when the absorbent article array is an absorbent article for infants (ages 0 to 4 years) and the number of size groups constituting 1 exponential size relationship is 3, as described above, among the 1 exponential size relationship, "the first group < the second group < the third group" holds, the third group is a size rank having a relatively large size (the largest size of the absorbent article among the size groups constituting the 1 exponential size relationship), and the total length of the absorbent articles in the longitudinal direction under non-stress in the third group is preferably 300mm or more, more preferably 350mm or more, further preferably 500mm or less, and more preferably 450mm or less. The total length in the non-stressed longitudinal direction of the absorbent article of each of the first group and the second group when the number of size groups constituting 1 exponential size relationship is 3 may be the same as the value when the number of size groups is 2.

In the first aspect of the invention, the swelling compactness index of the absorbent article for each of the plurality of size groups included in the absorbent article array is not particularly limited on the premise that the size relationship opposite to the size relationship as described above is established between at least some of the plurality of size groups, and can be appropriately set according to the application of the absorbent article and the like.

For example, in the case where the absorbent article array is an absorbent article for infants (ages 0 to 4 years) and the number of size groups constituting 1 exponential size relationship is 2 (the total number of size groups is 2), the swelling compactness index of the absorbent articles of each of the first group and the second group is preferably in the following range.

The swelling compactness index of the absorbent article of the first group is preferably 0.1 or more, more preferably 0.2 or more, and is preferably 0.6 or less, more preferably 0.4 or less.

The absorbent articles of the second group preferably have a swelling compactness index of 0.05 or more, more preferably 0.1 or more, and preferably 0.5 or less, more preferably 0.3 or less.

In addition, in the case where the absorbent article array is an absorbent article for infants (ages 0 to 4 years) and the number of size groups constituting 1 exponential size relationship is 3 or more (the total number of size groups is 3 or more), as described above, in the 1 exponential size relationship, "the first group < … … < the (n-1) th group < the nth group" holds, the nth group is a size group having a relatively large size (a group having the largest size of the absorbent article among the size groups constituting the 1 exponential size relationship), and the swelling compactness index (the smallest swelling compactness index) of the nth group is preferably 0 or more, more preferably 0.05 or more, and preferably 0.4 or less, and more preferably 0.2 or less.

In the second aspect of the invention, the wrapping and packing index of the absorbent article for each of the plurality of size groups included in the absorbent article series is not particularly limited on the premise that the size relationship opposite to the size relationship as described above is established between at least some of the plurality of size groups, and can be appropriately set according to the application of the absorbent article and the like.

For example, in the case where the absorbent article series is an absorbent article for infants (ages 0 to 4) and the number of size groups constituting 1 exponential size relationship is 2 (the total number of size groups is 2), the wrapping packing index of the absorbent articles of each of the first group and the second group is preferably in the following range.

The absorbent articles of the first group preferably have a package wind index of 0.7 or more, more preferably 0.8 or more, and preferably 1.5 or less, more preferably 1.2 or less.

The absorbent articles of the second group preferably have a package wind index of 0.6 or more, more preferably 0.7 or more, and preferably 1.2 or less, more preferably 1.0 or less.

In the case where the absorbent article array is an absorbent article for infants (ages 0 to 4 years) and the number of size groups constituting 1 exponential size relationship is 3 or more (the total number of size groups is 3 or more), as described above, in the 1 exponential size relationship, "the first group < … … < the (n-1) th group < the nth group" holds, the nth group is a size group having a relatively large size (a group having the largest size of the absorbent article among the size groups constituting the 1 exponential size relationship), and the winding packing index (minimum winding packing index) of the nth group is preferably 0.5 or more, more preferably 0.6 or more, and preferably 1.0 or less, more preferably 0.9 or less.

The swelling compactness index and the winding packing index can be adjusted by appropriately adjusting the size of the absorbent article (the entire length in the non-stressed longitudinal direction of the absorbent article in the non-stretched state saturated with physiological saline) and the length of the disposal tape in the stretching direction, respectively.

In either of the first and second inventions, the overall length of the disposal tape 4 in the longitudinal direction in the unwound and non-extended state (the overall length in the longitudinal direction X in the present embodiment) may be the same or different among the plurality of size groups in which the above-described exponential-magnitude relationship holds, regardless of the total number of size groups, but is preferably the same from the viewpoint of the complexity of material management for the overall length differences and the prevention of the occurrence of a problem that the target wound state cannot be achieved due to material inconsistencies.

The "unfolded and non-extended state" refers to a state (natural state) in which the disposal tape fixed to the outer surface of the absorbent article is unfolded when folded as in the disposal tape 4 and external force is not applied to the unfolded disposal tape. The term "same" as used above means that the absolute value of the difference between the lengths of the 2 waste tapes in the expansion and contraction direction in the natural state to be compared is within 10 mm.

In addition, not only between the plurality of size groups in which the above-described exponential magnitude relationship holds, the entire length of the disposal tape 4 in the longitudinal direction in the unfolded and non-extended state may be the same in all of the plurality of size groups included in the series.

In either of the first and second inventions, the length in the width direction (the length in the direction orthogonal to the longitudinal direction, in the present embodiment, the length in the lateral direction Y, the so-called width) of the stretchable portion (the stretchable portion 8) of the disposal tape 4 fixed to the outer surface of the diaper 1 in the non-stretched state may be the same or different regardless of the total number of the size groups, but as the size increases, the length (width) in the lateral direction Y of the diaper 1 increases, and the width increases, and the state in which the diaper is compactly gathered can be maintained, so that the size relationship of the size group having a relatively small size is preferably established as the size group having a relatively large size is established.

That is, when the total number of size groups is 2(n is 2), the width of the stretchable portion of the disposal tape 4 in the non-extended state is preferably such that a size relationship of "first group ≦ second group" is established between the first group (size group having a relatively small size) and the second group (size group having a relatively large size) which are the 2 groups.

The ratio of the width of the stretchable portion of the disposal tape 4 of the first group in the non-stretched state to the width of the stretchable portion of the second group in the non-stretched state is preferably 0.5 or more, more preferably 0.6 or more, and preferably 1.0 or less, more preferably 0.9 or less, in the case of the former < the latter, as expressed by the former/the latter.

In addition, when the total number of size groups is 3 or more (n.gtoreq.3), the size-size relationship of "the first group ≦ … … ≦ the (n-1) th group ≦ the nth group" is preferably satisfied with respect to the width in the non-extended state of the stretchable portion of the disposal tape 4 among the plurality of size groups in which the above-described exponential size relationship is satisfied among the 3 or more size groups.

In addition, not only between the plurality of size groups in which the above-described exponential size relationship is established, but also in all of the plurality of size groups included in the series, the size relationship of the size group having a relatively small size to the size group having a relatively large size is established with respect to the width of the stretchable portion of the waste belt 4 in the non-stretched state.

The stress after the disposal tape 4 fixed to the outer surface of the diaper 1 was held at 50% elongation at break for 20 minutes was set to σ 50₂₀The stress at the elongation at break immediately after the elongation at 50% is set to σ 50₀In the case of (1), in any of the first invention and the second invention, σ 50 is set regardless of the total number of size groups₂₀And 50₀Ratio of (a 50)₂₀/σ50₀The plurality of size groups in which the above-described exponential-size relationship holds may be the same or different from each other, but are preferably the same from the viewpoint that the feeling of use does not change when the size of the diaper 1 is changed in accordance with a change in the shape of the wearer, and problems such as breakage of the disposal tape 4 can be prevented.

The term "same" as used herein means that the absolute value of the difference between the shrinkage stresses of 2 waste tapes to be compared is within 10%.

That is, when the total number of size groups is 2(n is 2), it is preferable that the ratio σ 50 of the disposal tape 4 be set between the first group (the size group having a relatively small size) and the second group (the size group having a relatively large size) which are the 2 groups₂₀/σ50₀The same is true.

In addition, when the total number of size groups is 3 or more (n.gtoreq.3), it is preferable that the ratio σ 50 of the waste tape 4 is 50 between a plurality of size groups in which the above-described exponential size relationship holds in the 3 or more size groups₂₀/σ50₀The same is true.

In addition, not only between the plurality of size groups in which the above-described exponential magnitude relationship holds, but also in all of the plurality of size groups included in the series, the ratio σ 50 of the waste tape 4 is set to be smaller than the ratio σ 50₂₀/σ50₀May also be the same.

The elongation at break of the waste tape 4 can be determined by the above<Tensile test>Are measured. Stress sigma 50₀Is as described above<Tensile test>Stress at the time when the test piece (stretchable section 8 of the waste tape 4) is stretched to 50% of its elongation at break, stress σ 50₂₀Is the stress sigma 50₀The state of the test piece at the time of measurement (2) was maintained at the stress at the time of 20 minutes from the time of measurement. Stress relaxation may occur during continuous drawing of the waste tape, but by this the stress σ 50 will be measured₀The test piece was maintained for 20 minutes, and the stable stress applied to the absorbent article was measured. In addition, the degree of stress relaxation differs in the temperature and humidity environment, and therefore, the above-described stress relaxation is not limited to the above-described degree<Tensile test>The method is carried out in a certain environment with the atmosphere temperature of 23 +/-2 ℃ and the relative humidity of 50 +/-5%.

The upper limit of the elongation at break of the waste tape 4 is not particularly limited, but is preferably 500mm or less, and more preferably 400mm or less, from the viewpoint of preventing deterioration of the feeling of use due to overstretching the waste tape 4.

In order to obtain the disposal tape 4 satisfying the conditions of the breaking elongation and stress, it is important to select an appropriate material as the stretchable portion 8 of the disposal tape 4. As the material of the stretchable section 8, for example, a "stretchable film" that can be used as a constituent material of the sheet 80 for stretchable section can be used.

The elongation at break of the waste tape 4 is preferably 100mm or more (preferably 130mm or more, more preferably 150mm or more), and the stress σ 50 after the 50% elongation at break is continued for 20 minutes₂₀Stress σ 50 in 50% elongation immediately after elongation at break₀Is 20% or more (preferably 30% or more, more preferably 40% or more) (satisfies sigma 50₂₀/σ50₀≥0.2)。

Since the contraction force can be continuously applied to the inside in the radial direction of the diaper 1 in the rolled-up state from the time when the disposal tape 4 satisfying the conditions of the breaking extension and the stress is wound in the rolling direction of the diaper 1 rolled up in the longitudinal direction X and rolled up into a roll, the outer diameter of the diaper 1 rolled up into a roll and wound up with the disposal tape 4 contracts with time, and the disposal form of the diaper 1 becomes more compact.

In the present embodiment, as described above, the plurality of size groups included in the absorbent article array include the plurality of diapers 1 and the packaging container 16 (see fig. 7) that stores the plurality of diapers 1 therein, and when each diaper 1 is taken out from the packaging container 16 and placed under a non-stress condition, specifically, when it is in a folded state, it is preferable that the diaper 1 is released from the state and is left standing at normal temperature and normal pressure, and it is warped so as to protrude toward the side to which the disposal tape 4 is fixed.

In the present embodiment, when the plurality of diapers 1 inside the packaging container 16 are folded in two in the longitudinal direction X with the abdomen portion a (front body portion F) as the inside, and the diapers 1 are taken out from the inside of the packaging container 16 and left under no stress, as shown in fig. 9(a), the diapers project toward the back portion C (back body portion R) to which the disposal tape 4 is fixed, in other words, warp concavely toward the abdomen portion a (front body portion F), and the position of the fold line (the central portion in the longitudinal direction X of the diapers 1) becomes the top of the projection or the bottom of the depression. In this way, even when the diaper 1 with the fixed side of the disposal tape 4 warped is peeled off and developed into a flat shape, as shown in fig. 9(b), the diaper 1 is warped so as to protrude toward the fixed side of the disposal tape 4 (the outer surface side of the diaper 1), in other words, so as to be concave toward the non-fixed side of the disposal tape 4 (the inner surface side of the diaper 1). Therefore, in both the states of fig. 9 a and 9B, the diaper 1 is easily rolled up in the longitudinal direction X from the non-fixed side (the crotch portion B side in fig. 9 a, and the abdomen-side portion a side in fig. 9B) of the disposal tape 4 to the fixed side (the back-side portion C side) of the disposal tape 4, and the disposal form of the diaper 1 is easily made more compact.

As an example of a method for buckling the diaper 1 so as to protrude toward the fixed side of the disposal tape 4 (so as to be recessed toward the non-fixed side of the disposal tape 4) when it is taken out of the packaging container 16 and placed under a non-stress condition in this manner, there is a method of fixing an elastic member in an extended state in the longitudinal direction in a region including the longitudinal center portion (crotch portion) on the non-fixed side of the disposal tape, that is, on the inner surface side (skin-facing surface side) of the absorbent article. In this regard, as described above, in the diaper 1 of the present embodiment, since the leg gather forming elastic member 15 and the leakage preventive cuff forming elastic member 31 are fixed to the crotch portion B in the extended state in the longitudinal direction X, they are likely to warp to protrude toward the fixing side of the disposal tape 4 when taken out of the packaging container 16 and placed under a non-stress condition. As another example of the above method, as shown in fig. 2 and 3, a method can be given in which the portion of the leg gather forming elastic member 15 that overlaps the absorbent body 23 (absorbent main body 2) in a plan view (the portion of the elastic member 15 that extends in the transverse direction Y in the crotch portion B) is positioned on the abdomen side portion a with respect to the center (longitudinal center line CLx) in the longitudinal direction X of the diaper 1.

In the present embodiment, as described above, the disposal tape 4 is provided so as to be able to extend in the longitudinal direction X from the fixing portion 5 to the outer surface of the diaper 1, and therefore, the following series of disposal processes can be smoothly performed: the diaper 1 is rolled in the longitudinal direction X to be rolled into a rolled-up state, and the disposal tape 4 is extended and rolled in the rolling direction of the rolled-up diaper 1 (see fig. 6), and the disposal form of the diaper 1 formed in the disposal process is combined with the effect that the diaper 1 is easily warped to be convex toward the fixed side of the disposal tape 4 when it is taken out from the packaging container 16 and left under non-stress, and the structure can be made relatively compact.

In the present embodiment, the disposal tape 4 is folded on the outer surface of the diaper 1 when not in use as described above, but with reference to fig. 10, the total length L2 in the longitudinal direction X of the disposal tape 4 when the disposal tape 4 is unfolded in the longitudinal direction X without extending or contracting the disposal tape 4 from the folded state (the total length in the longitudinal direction in the unfolded and non-extended state of the disposal tape 4) is preferably 4 or less, more preferably 3 or less, with respect to the total length L1 in the longitudinal direction X under non-stress of the diaper 1. By establishing the magnitude relation of "L2/L1 ≦ 0.4", the contraction force of the waste tape 4 when the waste tape 4 is extended and wound in the winding direction of the diaper 1 can be made relatively strong with respect to the diaper 1 wound into a roll by being wound in the longitudinal direction X, and therefore the disposal form of the diaper 1 can be made more compact.

In the present embodiment, as shown in fig. 2 and 3, the absorber 23 has a groove portion 26 extending in the longitudinal direction X. As shown in fig. 4, the groove portion 26 is formed in the absorbent core 24 of the absorbent body 23, and has an opening on the skin-facing surface of the absorbent body 23 (absorbent core 24).

In the present embodiment, the groove portions 26 are rectangular in plan view, and 1 in the crotch portion B is formed in the central portion in the lateral direction Y of the absorbent body 23 (absorbent core 24). The shape, number, and arrangement position of the grooves 26 in plan view are not particularly limited, and the grooves 26 may be formed to extend in the longitudinal direction X and be curved.

In the present embodiment, in the groove 26, the skin-side wrapping sheet 25 covering the skin-facing surface of the absorbent core 24 and the non-skin-side wrapping sheet 25 covering the non-skin-facing surface of the absorbent core 24 are joined by joining means such as an adhesive or welding.

The groove 26 is a space where the material (water-absorbing material such as wood pulp or water-absorbing polymer) forming the absorbent core 24 is not present. The "absence of the forming material" as referred to herein includes not only a mode in which the forming material is not present at all, but also a mode in which a very small amount of the forming material is present to the extent that it can be recognized as a space portion. That is, the groove 26 may be a through type which penetrates the absorbent core 24 in the thickness direction, or may be a non-through type which does not penetrate the absorbent core 24 in the thickness direction. The through-type groove portion 26 has openings in both the skin-facing surface and the non-skin-facing surface of the absorbent body 23 (absorbent core 24). The non-penetrating groove 26 may have an opening on the skin-facing surface of the absorbent body 23 (absorbent core 24), or may have an opening on the non-skin-facing surface.

The absorbent core 24 having the groove portions 26 can be manufactured by using a known fiber stacking apparatus, as in the method for manufacturing the absorbent core of such an absorbent article. Typically, the fiber deposition apparatus includes a rotary drum having an accumulation recess on an outer peripheral surface thereof, and supplies a core forming material to the outer peripheral surface thereof in a scattered state while rotating the rotary drum, deposits the core forming material in the accumulation recess by suction from a bottom surface of the accumulation recess, and releases a fiber material in the accumulation recess from the accumulation recess by suction from a suction mechanism disposed to face the accumulation recess, and transfers the fiber material to the suction mechanism. In the fiber stacking device configured as described above, the non-air-permeable portion or the air-impermeable portion is formed at a part of the air-permeable bottom surface of the stacking recess, and the non-air-permeable portion or the air-impermeable portion is formed at a part of the bottom surface, so that the core-forming material is less likely to be stacked in the non-air-permeable portion or the air-impermeable portion when the core-forming material is stacked, and the amount of the stacked core-forming material in the non-air-permeable portion or the air-impermeable portion is smaller than that in other portions of the bottom surface. Thus, by using a fiber stacking device having a rotary drum in which a part of the bottom surface of the accumulation recess is an air impermeable part or an air impermeable part, the absorbent core is manufactured by a conventional method, and a part corresponding to the air impermeable part or the air impermeable part is a groove part 26, whereby the absorbent core 24 having the groove part 26 can be obtained.

Alternatively, the absorbent core 24 having the groove portions 26 may be obtained by removing a part or all of the core forming material forming predetermined portions of the groove portions 26 in the absorbent core 24 after the absorbent core 24 having no groove portions 26 is manufactured according to a conventional method.

The groove 26 is formed so as not to disappear even if the absorbent body 23 absorbs the liquid in a saturated state. This can be achieved by setting the depth of the groove 26 to a certain depth or more and/or setting the width (length in the lateral direction Y) of the groove 26 to a certain length or more.

In the absorbent body 23, if the groove portions 26 which do not disappear even if the absorbent body 23 absorbs liquid with saturation extend in the longitudinal direction X, when the used diaper 1 which has absorbed and retained excrement is rolled up in the longitudinal direction X and rolled up, the outer circumferential length in the rolling direction of the formation position of the groove portions 26 in the rolled-up diaper 1 becomes shorter than that of other portions, so that when the disposal tape 4 is unwound and wound around the rolled-up diaper 1, the disposal tape 4 is easily engaged with the formation position of the groove portions 26, and the winding becomes easy. In addition, since the disposal tape 4 is wound around a portion having a short outer circumference in the diaper 1 in a rolled state, the swelling compactness index and the winding baling index increase, and the disposal form becomes more compact.

From the viewpoint of more reliably exhibiting the operational effects of the groove portions 26 (e.g., the compactness of the disposal form of the diaper 1), the groove portions 26 are preferably located on a virtual straight line (in the illustrated embodiment, the transverse center line CLy) extending in the longitudinal direction X through the fixing portions (fixing portions 5) of the disposal tape 4 and the outer surface of the diaper 1, as shown in fig. 2 and 3.

Fig. 11 schematically shows a cross section along the transverse direction Y in a disposal form in which the diaper 1 is rolled up in the longitudinal direction X and the disposal tape 4 is wound up in the rolling-up direction. Referring to fig. 11, the ratio (W1/W0) of the length (width) W1 in the direction perpendicular to the extension direction in the 50% extension state of the breaking extension of the portion (stretchable portion 8) of the disposal tape 4 having stretchability in the longitudinal direction X to the length (width) W0 in the lateral direction Y of the groove portion 26 in the diaper 1 saturated with physiological saline is preferably 1.5 or less, and more preferably 1.0 or less. By satisfying this condition, when the used diaper 1 in which the excrement is absorbed and retained is rolled up in the longitudinal direction X to be rolled up into a rolled state and the disposal tape 4 is attached to the formation position of the groove portion 26 in the rolled diaper 1, the disposal tape 4 is easily engaged with the groove portion 26 as described above. In particular, when W1/W0 is smaller than 1, the disposal tape 4 is easily sandwiched by the groove portion 26 as shown in fig. 11, and the engagement of the disposal tape 4 with the groove portion 26 becomes stronger, so that the disposal form of the diaper 1 becomes more compact.

The "diaper 1 (absorbent article) saturated with physiological saline" described above is obtained by the saturated absorption treatment of physiological saline in the step 1 of the < measurement method of swelling compactness index > described above.

When the width W0 of the groove portion 26 varies and is not uniform in the depth direction of the groove portion 26, the width (length in the lateral direction Y) at the opening of the groove portion 26 is set to the width W0. When the width W0 of the groove 26 varies and is not uniform in the longitudinal direction (vertical direction X) of the groove 26, the maximum width is the width W0.

The width W1 of the waste tape 4 is the width (length in the direction perpendicular to the stretching direction) at the time when the test piece (the stretchable section 8 of the waste tape 4) is stretched to 50% of the elongation at break in the above-mentioned < tensile test >.

Fig. 12 shows a schematic structure of a diaper 1A as another embodiment of the absorbent article of the present invention. The diaper 1A is mainly described as being different from the diaper 1, and the same components are given the same reference numerals and are not described again. For the structure of the diaper 1A not specifically described, the description about the diaper 1 is appropriately applied.

In the diaper 1A, as shown in fig. 12 a, 2 groove portions 26 are formed in a portion of the absorbent body 23 (absorbent core 24) located in the crotch portion B. The 2

grooves

26, 26 are formed symmetrically with respect to the horizontal center line CLy (see fig. 2) at a predetermined distance in the horizontal direction Y. As shown in fig. 12(b), when the diaper 1A is rolled up in the longitudinal direction X and the disposal tape 4 is wound up in the rolling direction to be disposed of, the disposal tape 4 can be engaged with one of the 2

groove portions

26, 26. The diaper 1A can also provide the same effects as those of the diaper 1. In particular, since the plurality of groove portions 26 are formed in the diaper 1A, the operation of engaging the disposal tape 4 with the groove portions 26 can be easily performed.

The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments and can be modified as appropriate.

For example, in the above embodiment, the disposal tape 4 is in the three-folded state when not in use, but the form of the disposal tape 4 when not in use is not particularly limited, and the free portion 6 (the fixed portion 7, the stretchable portion 8) may be in the two-folded state, for example, provided that it can be extended outward in the lateral direction Y from the fixed portion 5. As the disposal tape 4 in the folded state, for example, the following modes can be illustrated: the fixed portion 5 (the fixing portion sheet 50) is folded back toward the stretchable portion 8 at one end in the longitudinal direction (the inner end in the lateral direction Y) to form a folded-back portion 50 ', the folded-back portion 50' is joined to the second surface 80b side at one end in the longitudinal direction (the inner end in the lateral direction Y) of the stretchable portion 8 (the stretchable portion sheet 80), the fixed portion 5 and the stretchable portion 8 are provided so as to be directly connected, and the fastening portion 7 (the fastening portion sheet 70) is directly connected to the other end in the longitudinal direction (the outer end in the lateral direction Y) of the stretchable portion 8 (the stretchable portion sheet 80).

In the above embodiment, the exterior body 11 extends in the longitudinal direction X from the front side portion a to the back side portion C through the crotch portion B, but instead of this configuration, the exterior body 11 may have a member constituting the front side portion a (front body portion) and a member constituting the back side portion C (back body portion) separately, and the absorbent main body 2 may be bridged and fixed to both members.

The parts of the above-described one embodiment can be appropriately used with each other in all embodiments.

The following is further disclosed with respect to the above-described embodiments of the present invention.

<1>

An absorbent article series including a plurality of absorbent articles having different sizes, the plurality of absorbent articles being divided into a plurality of size groups corresponding to the number of types of the sizes,

the plurality of absorbent articles each have: an absorber having a longitudinal direction corresponding to a front-rear direction of a wearer and a lateral direction orthogonal to the longitudinal direction, for absorbing and holding a body fluid; and a disposal tape having stretchability, which is fixed to an outer surface of the absorbent article,

regarding the swelling compaction index of the absorbent article measured by the following method, the following magnitude relationship holds between at least a part of the size groups among the plurality of size groups: relatively small-sized size groups > relatively large-sized size groups,

< measurement of swelling compaction index >

An absorbent article to be measured is saturated with physiological saline in an environment where the atmospheric temperature is 23 + -2 ℃ and the relative humidity is 50 + -5%, the inner surface of the absorbent article in an unfolded state is rolled up in the longitudinal direction as the inside, the outer circumferential length C1 in the rolling direction thereof is measured, the waste tape fixed to the outer surface of the rolled absorbent article is wound around the outer surface of the absorbent article in a state of being elongated to 50% of the elongation at break in the rolling direction of the absorbent article, the outer circumferential length C2 of the portion of the absorbent article around which the waste tape is wound is measured after being left for 20 minutes in this state, and the swelling compactness index of the absorbent article to be measured is calculated by the following formula,

the swelling compaction index is 1- (C2/C1).

<2>

The absorbent article array as described in above < 1 > wherein the number of size groups constituting 1 size relationship is 2, and the swelling compactness index of the absorbent articles of the relatively small size group (first group) is 0.1 or more and 0.6 or less, preferably 0.2 or more and 0.4 or less.

<3>

The absorbent article array as described in the above < 1 > or < 2 > wherein the number of size groups constituting 1 size relationship is 2, and the swelling compactness index of the absorbent articles of the size group (second group) having a relatively large size is 0.05 or more and 0.5 or less, preferably 0.1 or more and 0.3 or less.

<4>

The absorbent article array according to any one of the above < 1 > - < 3 >, wherein the number of size groups constituting 1 size relationship is 3 or more, and the swelling compaction index (minimum swelling compaction index) of the size group having the largest size of the absorbent article (the size group having the smallest swelling compaction index) among the 3 or more size groups is 0 or more and 0.4 or less, preferably 0.05 or more and 0.2 or less.

<5>

regarding the roll packing index of the absorbent article measured by the following method, the following magnitude relationship holds between at least a part of the size groups among the plurality of size groups: relatively small-sized size groups > relatively large-sized size groups,

< measuring method of winding packing index >

An absorbent article to be measured is saturated with physiological saline in an environment where the atmospheric temperature is 23 + -2 ℃ and the relative humidity is 50 + -5%, then the absorbent article in an unfolded state is rolled up in the longitudinal direction with the inner surface of the absorbent article as the inside, the outer peripheral length C1 in the rolling direction is measured, the total length T50 in the elongation direction of the waste tape fixed to the outer surface of the absorbent article to be measured when the waste tape is elongated to 50% of the elongation at break is measured, and the roll packing index of the absorbent article to be measured is calculated by the following formula,

and the winding packing index is T50/C1.

<6>

The absorbent article series as described in above < 5 >, wherein, in the size relationship, a size relationship of a relatively small size group > a relatively large size group ≧ 0.6 holds.

<7>

The absorbent article array as described above in the above < 5 > or < 6 > wherein the number of size groups constituting 1 size relationship is 2, and the wrap packing index of the absorbent articles of the relatively small size group (first group) is 0.7 or more and 1.5 or less, preferably 0.8 or more and 1.2 or less.

<8>

The absorbent article array as claimed in any one of the above-mentioned < 5 > - < 7 >, wherein the number of size groups constituting 1 of the size relationship is 2, and the wrap-up packing index of the absorbent articles of the relatively large size group (second group) is 0.6 or more and 1.2 or less, preferably 0.7 or more and 1.0 or less.

<9>

The absorbent article series according to any one of the above-mentioned < 5 > - < 8 >, wherein the number of size groups constituting 1 size relationship is 3 or more, and the winding packing index (minimum winding packing index) of the size group having the largest size of the absorbent articles (the size group having the smallest winding packing index) among the 3 or more size groups is 0.5 or more and 1.0 or less, preferably 0.6 or more and 0.9 or less.

<10>

The series of absorbent articles as described in any one of the above < 1 > - < 9 >, wherein the number of the size groups constituting 1 of the size relationships is smaller than the total number of the plurality of size groups (the relationship of the total number of the size groups > the number of the size groups constituting 1 of the exponential size relationships holds true).

<11>

The absorbent article series of any one of the above < 1 > - < 9 >, wherein the number of the size groups constituting 1 of the size relationships is the same as the total number of the plurality of size groups (the relationship of the total number of the size groups being the number of the size groups constituting 1 of the exponential size relationships holds true).

<12>

The absorbent article series of any one of the above < 1 > - < 11 >, wherein the entire length of the disposal tape in the longitudinal direction in the unfolded and non-extended state is the same among the plurality of size groups in which the magnitude relationship is established.

<13>

The absorbent article series according to any one of the above < 1 > - < 12 >, wherein the following dimensional relationships are established among the plurality of dimensional groups in which the dimensional relationships are established, with respect to the length of the stretchable portion of the disposal tape in the width direction in the non-extended state: a relatively small size group is ≦ a relatively large size group.

<14>

The absorbent article series of any one of the above < 1 > - < 13 >, wherein the stress of the waste tape after the 50% elongation at break is continued for 20 minutes is set to σ 50₂₀The stress just after the elongation at break of 50% is set to σ 50₀In the case of (a), σ 50₂₀And 50₀Ratio of (a 50)₂₀/σ50₀The plurality of size groups in which the size relationship holds are the same as each other.

<15>

The absorbent article series of any one of the above < 1 > -14 >, wherein the waste tape has a breaking elongation of 100mm or more, and a stress immediately after a 50% elongation state of the breaking elongation is 20% or more of a stress immediately after the 50% elongation state of the breaking elongation is continued for 20 minutes.

<16>

The absorbent article array as defined in any one of the above < 1 > - < 15 >, wherein the plurality of size groups respectively include a plurality of the absorbent articles and a packaging container for storing the plurality of the absorbent articles therein,

the absorbent article, when taken out from the inside of the packaging container and placed under no stress, is convexly warped toward the side to which the disposal tape is fixed.

<17>

The absorbent article series of any one of the above < 1 > - < 16 >, wherein the disposal tape is provided so as to be deployable in the longitudinal direction starting from a fixing portion with an outer surface of the absorbent article in use.

<18>

The absorbent article array as defined in < 17 > above, wherein the disposal tape is folded on the outer surface of the absorbent article when not in use, and the total length of the disposal tape in the longitudinal direction when the disposal tape is unfolded in the longitudinal direction without being stretched from the folded state is 4 or less relative to the total length of the absorbent article in the longitudinal direction under non-stress.

<19>

The absorbent article array as described in the above < 17 > or < 18 >, wherein the absorbent body has a groove portion extending in the longitudinal direction, and the groove portion does not disappear even if the absorbent body is saturated with liquid.

<20>

The absorbent article array as described in above < 19 >, wherein the groove portion is located on an imaginary straight line extending in the longitudinal direction through a fixing portion of the disposal tape to the outer surface of the absorbent article.

<21>

The absorbent article array as described in the above < 19 > or < 20 >, wherein a ratio of a length of the waste tape in a direction orthogonal to an elongation direction in a 50% elongation state of a breaking elongation of the portion having stretchability in the longitudinal direction to a length of the groove portion in the transverse direction in the absorbent article saturated and absorbing physiological saline is 1.5 or less.

<22>

The absorbent article series according to any one of the above < 1 > -21 >, wherein the absorbent article is a pants-type absorbent article having: a crotch part disposed in a crotch part of a wearer; a stomach-side portion disposed closer to the stomach side of the wearer than the crotch portion; and a back side portion disposed on the back side of the wearer with respect to the crotch portion, wherein the pants-type absorbent article has a side seal portion formed by joining both side edge portions of the front side portion and the back side portion in the longitudinal direction.

<23>

The absorbent article array as defined in above < 22 > wherein the absorbent article has a stretchable region having stretchability in the lateral direction in a portion located at the same position as the side seal in the longitudinal direction, the stretchable region including an upper stretchable region located on the waist opening side and a lower stretchable region located on the crotch side,

in the unfolded and extended state of the absorbent article, the length of the upper stretch region in the longitudinal direction is 10% or more and 70% or less, preferably 20% or more and 50% or less, with respect to the length of the side seal in the longitudinal direction.

The present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 3 and comparative examples 1 to 3

A plurality of pants-type disposable diapers having the same basic structure as the diaper 1 described above were produced in different sizes. The absorbent main body of the manufactured diaper has a front sheet, an absorbent body, and a back sheet in this order from the near side to the far side of the wearer's skin. MakingFor the above dough sheet, a grammage of 25g/m was used²The hydrophilic air-through nonwoven fabric of (1). The back sheet used was a sheet having a grammage of 18g/m on the skin-facing surface side²The non-skin-facing surface side of the polyethylene resin film (2) is composed of a polyethylene resin film having a grammage of 17g/m²A laminate of a resin film and a nonwoven fabric comprising the hydrophobic spunbond nonwoven fabric of (1). As the absorbent, an absorbent including an absorbent core in which water-absorbent polymer particles are supported on a stacked body of wood pulp and a core-spun sheet made of nonwoven fabric covering the outer surface of the absorbent core is used. However, the absorbent body does not have such groove portions as the groove portions 26 described above.

2 types of diapers having different sizes were selected from the produced plurality of types of diapers, and an absorbent article series of examples or comparative examples was produced. Each manufactured series of absorbent articles was divided into 2 size groups, a first group containing only relatively small-sized diapers, and a second group containing only relatively large-sized diapers. The "dimension" as referred to herein is, as described above, the longitudinal length of the diaper in the non-stretched state in which the diaper is unfolded and saturated with physiological saline, under non-stress.

The dimensions and the like of the diaper parts in each absorbent article series are shown in table 1. In the column of "disposal tape" in table 1, "length" is the total length of the disposal tape in the length direction (longitudinal direction of the diaper in the present embodiment and comparative examples) in the unused folded state, "width" is the length of the disposal tape in the direction orthogonal to the length direction (lateral direction of the diaper in the present embodiment and comparative examples) in the unused folded state, "developed length" is the total length of the disposal tape in the length direction in the developed and non-extended state, "non-stretchable length" is the total length of the disposal tape in the portion other than the stretchable portion in the total length of the disposal tape in the length direction in the developed and non-extended state, and "non-stretchable length" in the non-extended state is the length of the stretchable portion in the total length of the disposal tape in the length direction in the developed and non-extended state. In the column "absorbent article" in table 1, "amount of pulp" is the total mass of pulp contained in the absorbent body, "amount of water-absorbent polymer" is the total mass of water-absorbent polymer contained in the absorbent body, and "saturated absorption amount" is the difference in diaper weight before and after saturated absorption treatment of saline solution in step 1 < measurement method of swelling compactness index > described above.

The following methods were used to evaluate the compactness of the disposal form and the hygiene of the disposal form for each of the examples and comparative examples, and the results are shown in table 1.

< method for evaluating compactness of waste form >

With respect to all the absorbent articles (diapers) included in the absorbent article series to be evaluated, 10 panelists rolled up the diapers saturated with physiological saline in the longitudinal direction to form a mass, and the diapers formed in the mass were wound with the disposal tape in a state of being extended to about 50% of the breaking extension to form a disposal-type diaper. Diapers of the same disposal form were observed for diapers of different sizes, and evaluated according to the following evaluation criteria. The results were averaged to obtain evaluation points of 10 members and are shown in table 1.

A: the diaper in the disposal form is sensed to be compact in all size groups included in the series, and the diaper in the disposal form in the size group having a relatively small size and a large swelling compaction index or winding packing index is more compact than the size group having a relatively large size and a small swelling compaction index or winding packing index.

B: the diaper in the disposal form was found to be compact in all size groups included in the series, but there was no difference in the compactness of the diaper in the disposal form between the size groups included in the series.

C: there are size groups in the array that do not feel the compact feel of the disposal form of the diaper.

In addition to the compactness of the disposal form of all the diapers included in the series, the evaluation criteria relating to the compactness of the disposal form also evaluate the difference in compactness of the diapers in the disposal form between a relatively small size group (first group) and a relatively large size group (second group), reflecting the needs of the general user. In the latter case, the more the disposable diaper is generally a small-sized diaper for a small age, the more the frequency of excretion by the diaper wearer becomes, and therefore the more the number of replacements per 1 day becomes, the more the number of diapers to be discarded correspondingly tends to become, and therefore, the more compact disposal per 1 diaper is desired by the user particularly for a relatively small-sized diaper. In consideration of this point, the evaluation criterion is an evaluation item of whether or not diapers in a disposal form are compact in a size group having a relatively small size compared with other size groups.

< evaluation method of sanitation of waste form >

With respect to all the absorbent articles (diapers) included in the absorbent article series to be evaluated, 10 panelists rolled up the diapers saturated with physiological saline in the longitudinal direction to form a mass, and the diapers formed in the mass were wound with the disposal tape extended to about 50% of the elongation at break to form disposal diapers, and the diapers of the disposal form formed in the same manner were observed among the diapers of different sizes, and evaluated according to the following evaluation criteria. The results were averaged to obtain evaluation points of 10 members and are shown in table 1.

A: in all the size groups included in the series, it is felt that the disposal tape is strongly wound around the diaper, and the excrement is less likely to leak from the gap of the diaper in the disposal form, and the excrement is less likely to leak from the gap in the size group having a relatively small size and a large swelling compaction index or winding packing index than in the size group having a relatively large size and a small swelling compaction index or winding packing index.

B: in all the size groups included in the series, it is felt that the disposal tape is strongly wound around the diaper and the excrement is less likely to leak from the gap of the diaper in the disposal form, but there is no difference in the degree of leakage of the excrement from the gap between the size groups included in the series.

C: there are size groups in the series where it is not felt that the excrement is not easily leaked from the gap of the diaper in the waste form.

In addition to the hygiene of disposal forms (difficulty of leakage of excreta) of all diapers included in the series, the evaluation criteria of the hygiene of disposal forms described above reflect the needs of general users, and evaluate differences in hygiene between a group of relatively small sizes (first group) and a group of relatively large sizes (second group). In the latter case, the more the disposable diaper is generally a small-sized diaper for a shorter month, the lower the viscosity of the excrement (particularly, feces) of the diaper wearer, the higher the fluidity, and therefore, the more likely the excrement tends to leak out of the diaper in a waste form, and therefore, users generally strongly desire to avoid such a problem particularly in a diaper having a relatively small size. In consideration of this point, the evaluation criterion is to determine whether a size group having a relatively small size is superior in hygienic properties in a disposal form to other size groups.

[ Table 1]

As shown in table 1, in each example, with respect to the dimension of the absorbent article (the entire length in the longitudinal direction under non-stress, that is, the entire length in the longitudinal direction under non-stress of the absorbent article in the unfolded and non-extended state saturated with physiological saline), the relationship of "first group < second group" is established, and the relationship of "first group > second group" in which the dimension of the absorbent article is in a reverse relationship with respect to both the swelling compactness index and the winding packing index is established, so that the compactness and the hygiene of the disposal form are excellent as compared with each comparative example in which both the swelling compactness index and the winding packing index are in the same relationship with the dimension of the absorbent article.

The waste tapes in the first and second groups were the same in example 1, the "length" of the waste tapes in the first and second groups was different in example 2, and the "width" of the waste tapes in the first and second groups was different in example 3.

Industrial applicability of the invention

According to the present invention, an absorbent article series is provided which can dispose of an absorbent article after use in a compact and hygienic manner regardless of changes in the properties of excrement accompanying the use and growth of the body.

Claims

1. An absorbent article series including a plurality of absorbent articles having different sizes, the plurality of absorbent articles being divided into a plurality of size groups corresponding to the number of kinds of sizes thereof, the absorbent article series being characterized in that:

< measurement of swelling compaction index >

the swelling compaction index is 1- (C2/C1).

2. The array of absorbent articles of claim 1, wherein:

the number of size groups constituting 1 of the size relationship is 2, and the swelling compactness index of the absorbent article of the size group having a relatively small size is 0.1 or more and 0.6 or less.

3. The array of absorbent articles of claim 1 or 2, wherein:

the number of size groups constituting 1 of the size relationship is 2, and the swelling compactness index of the absorbent article of the size group having a relatively large size is 0.05 or more and 0.5 or less.

4. The array of absorbent articles according to any one of claims 1 to 3, characterized in that:

the number of size groups constituting 1 size relationship is 3 or more, and the swelling compaction index of a size group having the largest size of the absorbent article among the 3 or more size groups is 0 or more and 0.4 or less.

5. An absorbent article series including a plurality of absorbent articles having different sizes, the plurality of absorbent articles being divided into a plurality of size groups corresponding to the number of kinds of sizes thereof, the absorbent article series being characterized in that:

< measuring method of winding packing index >

and the winding packing index is T50/C1.

6. The array of absorbent articles of claim 5, wherein:

in the size relationship, a size relationship of > 0.6 is established for a size group having a relatively small size > a size group having a relatively large size.

7. The array of absorbent articles of claim 5 or 6, wherein:

the number of size groups constituting 1 of the size relationship is 2, and the wrap-packing index of the absorbent article of the size group having a relatively small size is 0.7 or more and 1.5 or less.

8. The array of absorbent articles according to any one of claims 5 to 7, characterized in that:

the number of size groups constituting 1 of the size relationship is 2, and the wrap-packing index of the absorbent article of the size group having a relatively large size is 0.6 or more and 1.2 or less.

9. The array of absorbent articles according to any one of claims 5 to 8, characterized in that:

the number of size groups constituting 1 size relationship is 3 or more, and the winding packing index of a size group having the largest size of the absorbent article among the 3 or more size groups is 0.5 or more and 1.0 or less.

10. The array of absorbent articles according to any one of claims 1 to 9, characterized in that:

the number of the size groups constituting 1 of the size relationships is smaller than the total number of the plurality of size groups.

11. The array of absorbent articles according to any one of claims 1 to 9, characterized in that:

the number of the size groups constituting 1 of the size relationships is the same as the total number of the plurality of size groups.

12. The array of absorbent articles according to any one of claims 1 to 11, characterized in that:

the entire length of the disposal tape in the longitudinal direction in the unfolded and non-extended state is the same among the plurality of size groups in which the magnitude relationship is established.

13. The array of absorbent articles according to any one of claims 1 to 12, wherein:

the following dimensional relationships hold true for the length in the width direction of the stretchable portion of the disposal tape in the non-stretched state among the plurality of dimensional groups in which the dimensional relationships hold true: a relatively small size group is ≦ a relatively large size group.

14. The array of absorbent articles according to any one of claims 1 to 13, characterized in that:

the stress after the 50% elongation at break of the waste tape was continued for 20 minutes was set to σ 50₂₀The stress just after the elongation at break of 50% is set to σ 50₀In the case of (a), σ 50₂₀And 50₀Ratio of (a 50)₂₀/σ50₀The plurality of size groups in which the size relationship holds are the same as each other.

15. The array of absorbent articles according to any one of claims 1 to 14, characterized in that:

the waste tape has a breaking elongation of 100mm or more and a stress immediately after a 50% elongation state of the breaking elongation is continued for 20 minutes is 20% or more of a stress immediately after the 50% elongation state of the breaking elongation.

16. The array of absorbent articles according to any one of claims 1 to 15, characterized in that:

the plurality of size groups respectively include a plurality of the absorbent articles and a packaging container that accommodates the plurality of the absorbent articles therein,

17. The array of absorbent articles according to any one of claims 1 to 16, wherein:

the disposal tape is provided so as to be capable of being unfolded in the longitudinal direction from a fixing portion with the outer surface of the absorbent article at the time of use.

18. The array of absorbent articles of claim 17, wherein:

the disposal tape is folded on the outer surface of the absorbent article when not in use, and the total length of the disposal tape in the longitudinal direction when the disposal tape is unfolded in the longitudinal direction without being stretched from the folded state is 4 or less relative to the total length of the disposal tape in the longitudinal direction under a non-stress condition of the absorbent article.

19. The array of absorbent articles of claim 17 or 18, wherein:

the absorbent body has a groove portion extending in the longitudinal direction, and the groove portion does not disappear even if the absorbent body absorbs liquid in a saturated manner.

20. The array of absorbent articles of claim 19, wherein:

the groove portion is located on an imaginary straight line extending in the longitudinal direction through a fixing portion of the disposal tape to the outer surface of the absorbent article.

21. The array of absorbent articles of claim 19 or 20, wherein:

the ratio of the length of the waste tape in the direction orthogonal to the elongation direction in the 50% elongation state of the elongation at break of the portion having stretchability in the longitudinal direction to the length of the groove portion in the transverse direction in the absorbent article saturated with physiological saline is 1.5 or less.

22. The array of absorbent articles according to any one of claims 1 to 21, characterized in that:

the absorbent article is a pants-type absorbent article having: a crotch part disposed in a crotch part of a wearer; a stomach-side portion disposed closer to the stomach side of the wearer than the crotch portion; and a back side portion disposed on the back side of the wearer with respect to the crotch portion, wherein the pants-type absorbent article has a side seal portion formed by joining both side edge portions of the front side portion and the back side portion in the longitudinal direction.

23. The array of absorbent articles of claim 22, wherein:

the absorbent article has a stretchable region having stretchability in the transverse direction, the stretchable region including an upper stretchable region located on the waist opening side and a lower stretchable region located on the crotch side, the stretchable region being located at the same position as the side seal in the longitudinal direction,

the length of the upper stretchable region in the longitudinal direction in the unfolded and extended state of the absorbent article is 10% or more and 70% or less with respect to the length of the side seal in the longitudinal direction.