CN114191183B - Absorbent article series - Google Patents

Abstract

The absorbent article series 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 the 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 compactness index or the winding packing index of the disposal tape (4) of the absorbent article (1), the following size relationship holds between at least some of the plurality of size groups: size group of relatively small size > size group of relatively large size.

Description

Absorbent article series

Technical Field

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

Background

As an absorbent article that can be easily and hygienically disposed of after use, there is known a structure in which a disposal tape is provided on an outer surface of the absorbent article, and the state of the absorbent article rolled into a small roll can be maintained by the disposal tape. Patent document 1 describes a fixing member that can be used as a disposal tape for absorbent articles, and as a use example of the fixing member, it is described that the fixing member is provided on an outer surface of a disposable diaper so as to be extendable in a longitudinal direction (a front-rear direction of a wearer of the diaper) at the time of use, and the fixing member is wound in a winding direction of a gathered diaper while being wound in the longitudinal direction to form a disposal form, whereby the disposal form can be maintained. In addition, regarding the use example of the fixing member, after the disposable diaper was allowed to stand for 2 minutes while absorbing 200ml of water at 40 ℃, the fixing member stretched and developed by a force of 500gf was wound, and when the adhesive layer provided in the fixing member was left standing for 1 hour in a state of being adhered to the diaper, the adhered state of the adhesive layer was maintained ([ 0074] of patent document 1).

Patent document 2 describes an arrangement of packages including 3 or more pants-type disposable diapers of different sizes. According to patent document 2, the "arrangement" refers to a display of packages including diapers of different sizes having similar article structures, and the "packages" have the same brand and/or sub-brand and are 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 is established between these packages with respect to the dimensions (product length, waist width, etc.) of the respective portions of the diapers included in the packages. According to the arrangement of packages described in patent document 2, diapers included in the arrangement are designed to be provided for various wearers in accordance with the BMI and body shape of the wearer, and are suitable for a wide range of adult consumers. Patent document 2 does not specifically describe a disposal form of diapers.

Prior art literature

Patent literature

Patent document 1: U.S. patent application publication 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 different in size, the plurality of absorbent articles being divided into a plurality of size groups corresponding to the number of kinds of the sizes thereof.

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

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

Measurement method of swelling compact index

After the absorbent article to be measured was saturated with physiological saline under a measurement environment having an atmospheric temperature of 23±2 ℃ and a relative humidity of 50±5%, the absorbent article was rolled up in the longitudinal direction with the inner surface of the absorbent article in the rolled-up state as the inner side, and the outer circumferential length C1 in the rolling-up direction was measured. Further, the waste 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 breaking elongation, and after being left to stand for 20 minutes in this state, the outer circumferential length C2 of the portion of the absorbent article around which the waste tape was wound was measured. Then, the swelling compactness index of the absorbent article to be measured was calculated by the following formula.

Swelling compactibility 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 the sizes thereof.

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

In one embodiment of the absorbent article series of the present invention (second invention), regarding the wrapping index of the absorbent article measured by the following method, the following size 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.

Method for measuring winding packing index

After the absorbent article to be measured was saturated with physiological saline under a measurement environment having an atmospheric temperature of 23±2 ℃ and a relative humidity of 50±5%, the absorbent article was rolled up in the longitudinal direction with the inner surface of the absorbent article in the rolled-up state as the inner side, and the outer circumferential length C1 in the rolling-up direction was measured. Further, the total length T50 of the waste tape in the extension direction of the waste tape fixed to the outer surface of the absorbent article to be measured was measured when the waste tape was extended to 50% of the breaking extension. Then, the wrapping and packing index of the absorbent article to be measured was 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 a back side portion side of a pants-type disposable diaper as an embodiment of an absorbent article of the present invention.

Fig. 2 is a developed plan view schematically showing the diaper shown in fig. 1 in a developed and extended state, with an inner surface side (skin-facing surface side, placement surface side of the absorbent main body) partially cut.

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

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

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

Fig. 6 (a) is a perspective view schematically showing a case where the disposal tape is stretched 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 clustered state.

Fig. 7 is a partially cut-away perspective view schematically showing an example of a packaging structure for an absorbent article, which is one embodiment of a size group included in an absorbent article series according to the present invention.

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

Fig. 8 (b) is an explanatory diagram of the outer circumferential length C2 of the absorbent article in the measurement method of the swelling compactness 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 put into an unfolded state.

Fig. 10 is an explanatory view of a relationship between a longitudinal length of an absorbent article and a longitudinal length of a disposal tape according to an embodiment of the absorbent article of the present invention.

Fig. 11 is a schematic cross-sectional view in the transverse direction of a waste form formed by winding up the diaper shown in fig. 1 in the longitudinal direction and winding up the waste tape in the winding-up direction thereof, and corresponds to the schematic cross-sectional view of the waste form of the diaper shown in fig. 6 (b).

Fig. 12 (a) is a plan view showing a schematic 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 waste form of the diaper shown in fig. 12 (a).

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 thereof after use and rolled up, it is required that excrement such as urine and feces, which is absorbed and held by an absorber provided in the absorbent article, not leak to the outside, and that disposal treatment can be performed compactly and hygienically using the disposal tape. However, there is room for improvement in the conventional absorbent articles.

For example, an L-size disposable diaper for infants is typically designed such that the weight of each product is about 30 to 40g, and the absorption amount of excrement when worn is assumed to be about 100g, but the absorption amount of excrement in a use where the wearing time is relatively long, such as sleeping or going out, is 200g or more, and is 300g or more in many cases, and it is difficult in the prior art to make a used diaper that has been greatly swelled by such long-term wearing smaller and more compact. Further, as the size for the lower month age becomes smaller, the number of diaper changes per 1 day, that is, the number of discarded diapers becomes larger, and it is desired that each 1 diaper can be discarded compactly.

Further, for example, as the month age of infants and babies becomes higher, the feces properties tend to be changed, but in the case where the month age of the diaper wearer is relatively high, the feces are relatively easy to remove from the diaper surface, so that the feces can be flushed into the toilet bowl without taking care in hygiene, and after the diaper is rolled up and the disposal tape is rolled up after use, the feces are relatively unlikely to leak out, but in the case where the month age of the diaper wearer is relatively low, the feces held by the diaper absorb most of the feces with high flowability such as soft feces or diarrhea feces, and therefore, it is difficult to remove the feces from the diaper surface, and the diaper is rolled up and the disposal tape has to be rolled up while taking into consideration the condition that the feces is not adhered to the hands when the diaper is curled up, and on the other hand, the feces tend to leak out from the diaper in the disposal form easily occurs without firmly rolling up the disposal tape into the rolled up diaper.

The conventional absorbent article is not designed to take into consideration differences in use, differences in faecal properties accompanying the growth of the body of the wearer, and the like, and there is room for improvement in waste form.

The present invention relates to an absorbent article series capable of compactly and hygienically disposing of used absorbent articles regardless of the use or the change of the property of excreta accompanying the growth of the body.

The present invention will be described below with reference to the drawings based on preferred embodiments thereof. In the description of the drawings below, 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 are sometimes different from reality.

The absorbent article series of the present invention includes at least 2 or more kinds of absorbent articles different in size (dimension). The plurality of types of absorbent articles are partially or completely identical to each other except for the size thereof, and the effects exerted by the absorbent articles are also identical. The term "partially identical" as used herein means that, for example, the basic structure or main structure of an absorbent article (for example, the absorbent body 2 in the diaper 1 described later) or a characteristic portion (for example, the absorber 23 in the diaper 1 described later) that characterizes the absorbent article is structurally or compositionally identical, and other elements (except for the dimensions) are different.

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

The term "absorbent article" as used herein includes a wide range of articles for absorbing body fluids (urine, soft feces, menstrual blood, sweat, etc.) discharged from the human body, and includes, for example, disposable diapers, sanitary napkins, and shorts. The disposable diapers include pants-type diapers in which waist openings and leg openings are formed, and developed diapers in which the waist openings and the leg openings are not formed and in which the absorbent body has a landing member in a non-disposed portion (web portion), and the present invention can be applied to any type of disposable diapers.

Fig. 1 to 4 show a diaper 1 as one embodiment of an absorbent article included in the absorbent article series of the present invention. Hereinafter, the absorbent article of the present invention will be described by taking a diaper 1 as an example.

The diaper 1 has a longitudinal direction X corresponding to the front-back direction of the wearer, that is, the direction extending from the abdomen side to the back side through the crotch, and a transverse direction Y orthogonal to the longitudinal direction X. The diaper 1 is divided into 3 parts: a crotch portion B disposed in a crotch portion of a wearer and including a excretory portion facing portion (not shown) facing an excretory portion of the wearer such as a penis; a side part a disposed closer to the abdomen (front side) of the wearer than the crotch part B; and a back side portion C disposed closer to the back side (rear side) of the wearer than the crotch portion B. The diaper 1 has an absorber 23 for absorbing and retaining body fluid and a disposal tape 4 having stretchability and 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 joined to each other along both side edges of a front side portion a and a back side portion C in a longitudinal direction X, and includes an absorbent main body 2 including an absorber 23, and an outer body 11 disposed on a non-skin-facing side of the absorbent main body 2. The absorbent body 2 and the outer body 11 are joined by an adhesive. The outer body 11 has an extension portion having a larger area than the absorbent main body 2 and extending outward from the peripheral edge of the absorbent main body 2. The outer body 11 has a pair of side wing portions 10, 10 formed at the outer side of the side edges 2S, 2S of the absorbent main body 2 in the longitudinal direction X and the virtual extension line thereof in the lateral direction Y, of the extension portion extending from the absorbent main body 2. The pair of side flaps 10, 10 of the abdomen portion a and the back portion C are joined to each other to form a pair of side seals S, a waist opening WH, and a pair of leg openings LH, LH.

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

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

In the present invention, the abdomen-side portion a, the crotch portion B and the back-side portion C may be respective regions in which the diaper 1 in the unfolded and elongated state is three-equally divided in the longitudinal direction X.

The transverse centerline CLy is an imaginary straight line bisecting the diaper 1 in the developed and elongated state shown in fig. 2 and 3 in the transverse direction Y and extending in the longitudinal direction X. The longitudinal center line CLx is a virtual straight line that bisects the diaper 1 in the developed and elongated state in the longitudinal direction X and extends in the transverse direction Y.

The term "developed and extended state" as used herein refers to a state in which the diaper 1 is cut at the side seal S to be in a developed state, and the diaper 1 in the developed state is extended to have the elastic members in the respective parts extended to be in the designed dimensions (the same dimensions as when developed in a planar shape in a state in which the influence of the elastic members is completely removed).

In the present embodiment, as shown in fig. 2 and 3, the absorbent main body 2 has a rectangular shape in plan view, and is disposed in the central portion of the outer body 11 in the lateral direction Y so as to match the longitudinal direction X of the diaper 1, and extends in the longitudinal direction X from the abdomen portion a to the back portion C through the crotch portion B. The outline of the absorbent body 2 in a plan view substantially matches the outline of the absorber 23.

As shown in fig. 4, the absorbent main 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 back sheet 22 which is impermeable to liquid or hardly permeable to liquid or water repellent (in short, leak-proof), and which is disposed at a relatively distant position from the skin of the wearer; an absorber 23 interposed between the front sheet 21 and the back sheet 22. The absorber 23 is configured to include: an absorbent core 24 capable of absorbing and retaining body fluid; and a core wrap 25 covering the outer surface of the skin-facing side and the non-skin-facing side comprising 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 commonly 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 of a resin film and a nonwoven fabric, and the like can be used as the back sheet 22. Typically, the absorbent core 24 is mainly composed of a water-absorbing material, and the water-absorbing material contains 1 or more materials selected from fiber materials such as wood pulp and water-absorbing polymers. The core wrap 25 has liquid permeability and is typically formed of paper, nonwoven fabric, or the like. The chipper 25 may also be absent.

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

As shown in fig. 4, a pair of leakage preventing cuffs 3, 3 that stand 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 leakage preventing cuff 3 includes a leakage preventing sheet 30 having liquid-blocking property or water-repellent property and air-permeable property, and one end side of the leakage preventing sheet 30 in the lateral direction Y is fixed to other members (in the illustrated embodiment, the absorbent main body 2 and an outer body 11 described later) to form a fixed end portion, and the other end side of the lateral direction Y is not fixed to other members to form a free end portion. The leakage preventing edge forming elastic member 31 is fixed to the free end portion of the leakage preventing sheet 30 in a state of being elongated in the longitudinal direction X, and is configured to be stretchable in the direction. When the diaper 1 is worn, the pair of leakage preventing cuffs 3, 3 are raised by the contraction force of the elastic members 31 so that the free end portion side of the leakage preventing sheet 30 is raised toward the wearer with the fixed end portion as a raised base end at least in the crotch portion B, thereby preventing excrement such as urine from flowing out in the lateral direction Y.

In the present embodiment, as shown in fig. 4, the exterior body 11 is configured to include: an outer layer 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 to be integrated. The outer layer sheet 12 is the outermost layer of the outer body 11, forms the non-skin-facing surface of the outer body 11, and forms the outer surface of the diaper 1. The inner layer sheet 13 is the innermost layer of the outer body 11, and forms the skin-facing surface of the outer body 11. The absorbent body 2 is bonded to the skin-facing surface of the inner sheet 13.

The outer sheet 12 and the inner sheet 13 may be nonwoven fabrics, resin films, and the like produced by various methods, and examples of nonwoven fabrics include spunbond nonwoven fabrics, hot air nonwoven fabrics, and needled nonwoven fabrics. 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 lateral direction Y, or may be non-stretchable sheets having no stretchability.

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

As shown in fig. 2 and 3, the side wing portion 10 of each of the abdominal portion a and the back portion C has a stretchable region G having stretchability in the lateral direction Y. The stretchable region G includes a sheet forming the side wing portion 10 and a plurality of elastic members 14 arranged on the sheet so as to be stretchable in the lateral direction Y. The plurality of elastic members 14 extend in the lateral direction Y and are arranged at intervals in the longitudinal direction X. In the present embodiment, the elastic member 14 is located in the waist portion (a portion located at the same position as the side seal S in the longitudinal direction X), and can be referred to as a waist elastic member.

In the present embodiment, the "sheets forming the side flap portion 10" described above are the outer layer sheet 12 and the inner layer sheet 13. The stretchable 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 of being stretched in the lateral direction Y, and then releasing the elastic member 14 from the stretched state. In the wearing state of the diaper 1, a plurality of pleats extending in a direction intersecting the elastic member 14 (longitudinal direction X) are formed on the surface of the stretchable region G by contraction of the elastic member 14.

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

In the present embodiment, the stretchable region G is defined by the longitudinal end 2E of the absorbent main body 2 and the virtual extension thereof, and includes an upper stretchable region G1 located on the waist opening WH side and a lower stretchable region G2 located on the crotch B side.

The upper stretchable region G1 includes an opening peripheral edge portion of the waist opening WH, and is disposed around the waist of the wearer (waist portion) when the diaper 1 is worn. In the developed and elongated state of the diaper 1 shown in fig. 2 and 3, the length of the longitudinal direction X of the upper stretchable 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 of the longitudinal direction X of the side seal S.

The lower stretchable region G2 is provided in a pair on both sides of the lateral direction Y with the absorbent body 2 interposed therebetween between the longitudinal end 2E of the absorbent body 2 and its virtual extension line and the lower end Sb of the side seal S (the end portion relatively close to the longitudinal center line CLx of the both ends of the longitudinal direction X of the side seal S).

The absorbent article of the present invention has a disposal tape that is fixed to the outer surface of the absorbent article and has stretchability. The disposal tape of the present invention is not particularly limited in its structure and arrangement position, provided that it is based on the description of the winding packing index and the swelling compactness index described later. For example, the disposal tape of the present invention may be provided so as to be stretchable in the longitudinal direction from the fixing portion to the outer surface of the absorbent article, or may be provided so as to be stretchable in the transverse direction. In the present embodiment, the former is employed as described later. In the latter case, the diaper 1 is typically taken as an example, and the disposal tape 4 is fixed to the outer surface of the stretchable region G (the upper stretchable region G1 and/or the lower stretchable region G2) of at least one of the pair of side flaps 10, 10 of the back portion C.

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

The disposal tape 4 is formed in a tape shape that is 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 extendable in the longitudinal direction X from a fixed portion with the outer surface of the diaper 1.

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

In the present embodiment, the disposal tape 4 includes a fixing portion 5 fixed to the outer surface of the diaper 1 and a free portion 6 extendable outward in the longitudinal direction X (direction indicated by reference symbol X1 in fig. 5) from the fixing portion 5, and the free portion 6 includes a fastening portion 7 capable of being fastened to the outer surface of the diaper 1 and a stretchable portion 8 located between the fixing portion 5 and the fastening portion 7.

The fastening portion 7 forms a distal end portion of the disposal tape 4, and can be fastened to an arbitrary position on the outer surface of the diaper 1, and is a portion fastened to the outer surface of the diaper 1 when the disposal tape 4 is used to maintain the disposal form of the diaper 1. 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 an adhesive, a hook member, or the like can be appropriately used as a fastening means in the art.

The stretchable portion 8 is a portion that can be easily stretched with a relatively weak stretching force when the stretching force is applied to the disposal tape 4, and increases the length of the disposal tape 4. The expansion and contraction section 8 can expand and contract not only in the longitudinal direction X but also in the longitudinal direction X. The term "stretchable" as used herein means that the waste tape 4 is stretched when a tensile force is applied thereto, and is contracted when the tensile 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 laminated in this order on the outer surface of the diaper 1. In fig. 5, for convenience of explanation, it is described that there is a gap between the fixing portion 5 and the telescopic portion 8 and between the telescopic portion 8 and the fixed portion 7, but the actual disposal tape is not limited to having such a gap.

In the present embodiment, the fixing portion 5 of the disposal tape 4 has a fixing portion sheet 50. The fixing portion sheet 50 has a first surface 50a and a second surface 50b. In the disposal tape 4 in the folded state, the fixing portion sheet 50 has a first surface 50a facing the stretchable portion 8 and a second surface 50b facing the outer surface of the diaper 1, except for a folded portion 50' described later. The fixing portion 5 further includes 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 fixing portion 5 is fixed to the outer surface of the back side portion C of the diaper 1 by the fixing portion adhesive portion 51. The disposal tape 4 is fixed to the outer surface of the back side portion C of the diaper 1 via the fixing portion adhesive portion 51 so as not to be 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 of the stretchable portion sheet 80 in the longitudinal direction (length of the longitudinal direction X) may be the same as or different from the length of the fixed portion sheet 50 in the longitudinal direction (length of the longitudinal direction X). The width (length in the lateral direction Y) of the stretchable portion sheet 80 may be the same as or different from the width (length in the lateral direction Y) of the fixed portion sheet 50. The stretchable portion sheet 80 has a first surface 80a and a second surface 80b. In the disposal tape 4 in the folded state, the stretchable portion sheet 80 has a first surface 80a facing the fixed portion 7 and a second surface 80b facing the fixed portion 5, except for a folded portion 80' described later. The expansion and contraction part 8 has an expansion and contraction part adhesive part 81. The expansion and contraction section adhesive section 81 is provided on the second surface 80b of the expansion and contraction section sheet 80. The stretchable portion adhesive portion 81 releasably joins the stretchable portion 8 and the fixed portion 5 of the disposal tape 4 in a folded state. Therefore, the expansion-section adhesive portion 81 is preferably composed of an adhesive having low adhesion.

The fixing portion sheet 50 of the fixing portion 5 has a folded portion 50' of which one end in the longitudinal direction (the 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) of the stretchable portion sheet 80 of the stretchable portion 8 on the second surface 80b side. Thus, the fixing portion 5 and the telescopic portion 8 are provided directly connected to 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 has a fastening portion sheet 70. The length of the fixing portion sheet 70 in the longitudinal direction (length of the longitudinal direction X) may be the same as or different from the length of the fixing portion sheet 50 or the extension portion sheet 80 in the longitudinal direction (length of the longitudinal direction X). The width (length in the lateral direction Y) of the fixing portion sheet 70 may be the same as or different from the width (length in the lateral direction Y) of the fixing portion sheet 50 or the stretchable portion sheet 80. The fastening portion sheet 70 has a first surface 70a and a second surface 70b. In the disposal tape 4 in the folded state, the second surface 70b of the fixing portion sheet 70 faces the stretchable portion 8. The fixing portion 7 has a fixing portion adhesive portion 71. The fixing portion adhesive portion 71 is provided on the second surface 70b of the fixing portion sheet 70. The fixing portion adhesive portion 71 joins the fixing portion 7 of the disposal tape 4 in a folded state and the stretchable portion 8 in a releasable manner, and fixes the fixing portion 7 to an appropriate portion of the outer surface of the diaper 1. The degree of adhesiveness of the fixing portion adhesive portion 71 is preferably determined from this point of view.

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

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

The fixing portion sheet 50 constituting the fixing portion 5 may be made of the same material as that of the stretchable portion sheet 80, or may be made of any material that cannot be stretched, that is, cannot be plastically deformed. For example, a resin sheet (plastic sheet, film, etc.), a nonwoven fabric, or a known sheet used in the prior art of woven fabric may be used without particular limitation. Even if the constituent material of the fixing portion 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 fixed portion 5 and the fixed portion adhesive portion 71 for releasably joining the fixed 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. In addition, an adhesive composed of a heat seal, a hot melt adhesive, a melt blown or fibrous adhesive, an adhesive, or the like may be used.

The expansion and contraction portion adhesive portion 81 and the fixing portion adhesive portion 71 may be formed on the entire surface of the second surface 80b of the expansion and contraction portion sheet 80. The adhesive portions 81 and 71 may be formed at intervals. In this case, the adhesive portions 81 and 71 can be formed at intervals by applying the adhesive at intervals.

The disposal tape 4 may be manufactured as follows: the fixing portion sheet 50 is partially laminated on one end portion in the longitudinal direction of the expansion portion sheet 80, the fixing portion sheet 70 is partially laminated on the other end portion in the longitudinal direction of the expansion 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 portions of the fixing portion 5, the stretchable portion 8, and the fixing portion 7 is folded in the longitudinal direction (longitudinal direction X) in a cross-sectional view along the thickness direction in the longitudinal direction X shown in fig. 5, and is folded in a zigzag shape in the present embodiment. The disposal tape 4 is provided on the outer surface of the central portion of 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 side portion C so that the front end of the uppermost fastening portion 7 (the pinching piece 72) 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 of the longitudinal direction X (the longitudinal center line CLx) of the diaper 1, 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 fixed portion 5 by grasping the front end of the fastening portion 7 with fingers or the like and stretching it 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 the unfolded state of the folded state. More specifically, the portion of the stretchable portion sheet 80 other than the both end portions joined to the fixing portion sheet 50 or the fixing portion sheet 70 can be elongated in the longitudinal direction. The developed state of the folded state refers to a state in which the portions of the disposal tape 4 that are in contact with each other in the folded state of the disposal tape 4 are peeled off from each other, and the disposal tape 4 is developed into a straight line. For example, the developed state of the three-folded state shown in fig. 5 is a state in which the stretchable portion 8 of the disposal tape 4 is peeled off from the fixed portion 5, and the stretchable portion 8 is peeled off from the fixed portion 7, and the disposal tape 4 in the three-folded state is developed in a straight line. In the developed state, the disposal tape 4 can be stretched by a manual force, and at this time, the stretchable portion 8 can be stretched.

Typically, as shown in fig. 6, the diaper 1 is rolled up in the longitudinal direction X from the abdomen side portion a side toward the back side portion C side (the arrangement side of the disposal tape 4) with the inner surface (the skin-facing surface, the arrangement surface of the absorbent main body 2) thereof being the inner side, by tearing the side seal portion S open (the state where the front body portion F and the back body portion R do not overlap), whereby the diaper 1 is rolled up in a rolled state, and the disposal tape 4 is rolled up on the diaper 1 in the rolled state in the rolling direction (longitudinal direction X) of the diaper 1, thereby forming the disposal form of the diaper 1. At this time, the side flap 10 may be folded toward the absorbent body 2 with the inner surface of the diaper 1 as the inner side before the diaper 1 is rolled up.

As another example of the method of rolling up the diaper 1, there is a method of rolling up the diaper 1 in which the front body F and the rear body R are overlapped with the placement surface of the absorbent body 2 inside, from the crotch portion B to the waist opening WH side (the placement side of the disposal tape 4) with the front body F inside. In this case, the side flap 10 may be folded toward the absorbent body 2 with the abdomen-side portion a as the inner side before the diaper 1 is rolled up.

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

The absorbent article series 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 kinds of the sizes thereof.

For example, in the case where the absorbent article series of the present invention includes 3 kinds of disposable diapers of a plurality of S-size, M-size, and L-size in order of size from small to large, the plurality of disposable diapers are divided into a plurality of size groups corresponding to 3 kinds of the sizes thereof, that is, 3 size groups of S-size group, M-size group, and L-size group.

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 under non-stress in an expanded and non-elongated state (state in which no external force is applied). The term "dimensional difference" as used herein means that the dimensions (the overall length in the machine direction) defined in this way are different from one another in the comparative absorbent articles. For example, in the case of commercially available diapers for infants, diapers having different sizes according to the age of the infant are generally prepared. In general, large diapers are used for infants with a high month-old age, and the larger the diaper is, the larger the saturated absorption capacity of physiological saline is. Therefore, in general, the larger the diaper for advanced months, the larger the "size of the absorbent article" described above.

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

The term "developed and non-extended state" refers to a state in which an absorbent article saturated with physiological saline is developed so that the front body and the rear body do not overlap, and the elastic members of the respective parts of the absorbent article are in a non-extended state (natural state). In the case of the diaper 1, the side seal S is peeled off to allow the elastic members of each portion to be stretched in a flat state without being stretched, and the state is stretched and not stretched.

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

The plurality of diapers 1 are respectively stored in the package container 16 in a folded state. In the present embodiment, the plurality of diapers 1 inside the packaging container 16 are folded in half in the longitudinal direction X with the side portions a inside. The plurality of diapers 1 in the folded state are stacked in one direction to form a stack, and the stack is housed in the package container 16 in a state where a plurality of diapers are stacked in the height direction of the package structure 17 and integrally compressed.

The packaging container 16 is not particularly limited as long as it can house 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 the above-described "name common to a plurality of types of absorbent articles constituting the absorbent article series", that is, a so-called brand name.

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

First invention: regarding the swelling compactness index of an absorbent article measured by the following method, the following size 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 wrapping packing index of the absorbent article measured by the following method, the following size relationship holds between at least a part of 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 of the wound portion of the disposal tape 4 in the diaper 1 in the case where the diaper 1 in which the excrement is saturated and absorbed into a swollen state is wound up in the longitudinal direction X to be in a state of being wound up in a lump, and the disposal tape 4 which is elongated to 50% of the elongation at break is wound up in the winding up direction of the diaper 1 on the outer surface of the diaper 1 in the state of being wound up. The larger the value of the swelling compactness index, the more easily the outer diameter of the absorbent article in the waste form formed by rolling up in the longitudinal direction is smaller, and the waste form of the absorbent article having a large swelling compactness index becomes more compact.

The wrapping and packaging index used in the second invention is an index of how much the waste form of the diaper 1 after use is to be a waste form that is soft and leak-proof and sanitary, with respect to the ratio of the outer circumferential length C1 (see fig. 8 (a)) in the wrapping direction of the diaper 1 when the diaper 1 saturated with and absorbing excrement is wrapped in the longitudinal direction X to be a rolled state, which is the full length T50 at 50% of the breaking extension of the waste belt 4. The larger the number of the winding packing index, the longer the length of the waste tape 4 in the extension direction is relative to the outer circumferential length C1 of the diaper 1 in the winding direction, and therefore, the fastening action of the waste tape 4 to 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 method of swelling compact index

In an absorbent article to be measured (for example, diaper 1), physiological saline is saturated and absorbed in an environment having an atmospheric temperature of 23±2 ℃ and a relative humidity of 50±5%, and then the inner surface of the absorbent article in an unfolded state is rolled up in the longitudinal direction with the inner side, and the outer circumferential length C1 in the rolling-up direction is measured (see fig. 8 (a)) (step 1).

Further, a disposal tape (for example, the disposal tape 4 included in the diaper 1) fixed to the outer surface of the rolled up absorbent article is stretched to 50% of the elongation at break (that is, the entire length in the stretching direction is stretched so as to be T50), and is wound around the outer surface of the absorbent article in the rolling direction of the absorbent article, and after the tape is left to stand for 20 minutes in this state, the outer peripheral 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 compactibility index=1- (C2/C1)

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

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

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

In the above step 2, the reason why the outer circumferential length C2 is not measured immediately after the disposal tape is wound around the outer surface of the absorbent article, but left to stand for 20 minutes in a state where the disposal tape is wound is to stabilize the outer circumferential length C2. That is, the outer circumferential length C2 is unstable and changes in a certain period of time from the winding of the disposal tape around the outer surface of the absorbent article in a state in which the physiological saline is saturated, due to slippage of the sheet such as nonwoven fabric forming the outer surface of the absorbent article due to the expansion and contraction stress of the disposal tape, deformation of the water-absorbent polymer in the absorber of the absorbent article, and the like. Therefore, in the step 2, 20 minutes is used as a time required for stabilizing the outer circumferential length C2, and the outer circumferential length C2 is measured after 20 minutes from the winding of the disposal tape.

Method for measuring winding packing index

In an absorbent article to be measured (for example, diaper 1), physiological saline is saturated and absorbed in a measurement environment having an atmospheric temperature of 23±2 ℃ and a relative humidity of 50±5%, and then the inner surface of the absorbent article in an expanded state is rolled up in the longitudinal direction with the inner side, and the outer circumferential length C1 in the rolling direction is measured (see fig. 8 (a)) (step 1). The step 1 is the same as the step 1 of < measurement method of swelling compactness index > described above.

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

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

Winding packing index = T50/C1

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

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

The test was performed in an environment where the atmosphere temperature was 23±2 ℃ and the relative humidity was 50±5% without removing the waste tape to be measured from the absorbent article and fixing it to the absorbent article. Taking the case of measuring the total length T50 of the disposal tape 4 in the extension direction of the diaper 1 as an example, first, only the extension and contraction portion 8 of the disposal tape 4 is provided between a pair of chucks of a Tensilon tensile tester (product name "Autograph AG-X" manufactured by shimadzu corporation) so that the length direction coincides with the extension direction. At this time, in the tensile test, a commercially available adhesive tape is bonded to other portions (the fixing portion 5, the fixing 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. Next, the expansion and contraction section 8 was elongated by increasing the inter-chuck distance at a constant speed (300 mm/sec), and the inter-chuck distance at the time of breaking the expansion and contraction section 8 was measured. Then, the elongation at break of the expansion and contraction portion 8 is calculated by subtracting the inter-chuck distance (initial inter-chuck distance) before the start of elongation of the expansion and contraction portion 8 from the inter-chuck distance at the time of breaking of the expansion and contraction portion 8. The total length T50 in the extension direction of the disposal tape 4 is obtained by adding the extension degree of 50% of the breaking extension degree of the extension portion 8 to the total length (length from the fixing portion 5 to the fixing portion 7) in the length direction (longitudinal direction X) of the disposal tape 4 in the natural state (non-extended state) and in the extended state (unfolded state).

Since the total number of size groups included in the absorbent article series of the present invention is 2 or more, the size relationship (hereinafter, also referred to as "index size relationship") of "size group having a relatively small size > size group having a relatively large size" of the above-described "swelling compact index or wrapping packing index of the absorbent article" may be established not only between 2 size groups but also between 3 or more size groups.

Hereinafter, the total number of size groups included in the absorbent article series of the present invention is "n", and the present invention will be described in terms of the total number of size groups n.

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

In the present invention, when the total number of size groups n is 2 in this way, the "total number of size groups=the number of size groups constituting 1 exponential size relationship" is formed.

In the case where "n.gtoreq.3", the size-size relationship of "first group < … … < group < n-1" is established among the 3 or more size groups. In such a size relationship, in the case of "n=3", there is no other size group between the first group and the (n-1) th group, and in the case of "n+.4", there is another size group, and the "other size group" is given consecutive numbers from 2 to the first 1 number of (n-1) such as the second group, the third group, the fourth group, and the … …, respectively, according to the total number of size groups n. The "first group" is the group having the smallest size of the absorbent articles among the size groups included in the series, and the "nth group" is the group having the largest size of the absorbent articles among the size groups included in the series. Further, if the group sandwiched by these 2 groups, that is, for example, the second group, the third group, and the fourth group [ =the (n-1) th group ] when n is 5, the size of the absorbent article is larger than that of the first group, and the size of the absorbent article is smaller than that of the fifth group [ =the nth group ].

For example, in the absorbent article series, when the size group includes 3 groups of a first group (for example, a group of absorbent articles of S size), a second group (for example, a group of absorbent articles of M size), and a third group (for example, a group of absorbent articles of L size) in order of size from small to large, that is, when the size-size relationship of "first group < second group < third group" is established, the total number n of the size groups is 3. Moreover, in this case, where n.gtoreq.3, in the present invention, there may be the following modes: 1) The 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, there is a manner in which "first group > second group=third group" or "first group=second group > third group" is established; and 2) a mode in which 1 index size relation is established in all of the plurality of size groups, that is, a mode in which 1 size relation of "first group > second group > third group" is established in the case of the above-described example. In the mode of 2) above, "the total number of size groups (3 in the above example) =the number of size groups (3 in the above example) constituting 1 exponential size relationship)". In contrast, in the embodiment 1), the number of the index-size relationships established in the 1 series of absorbent articles is 1 or more, and the "total number of size groups (3 in the example) > the number of size groups (2 in the example) constituting the 1 index-size relationships".

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

Generally, the absorbent article is sized to match the age and shape of the wearer. For example, in the case where the absorbent article series includes 4 disposable diapers of S size, M size, L size, big size in order of size, 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) th) < Big size group (fourth group, M-th)" holds.

Here, in the first specific embodiment, for example, the relationship between the swelling compact index (first invention) and the winding packing index (second invention), the 2 index size relationships of the "S-size group (first group) > M-size group (second group)" and the "L-size group (third group) > Big-size group (fourth group)" are established, but the relationship between the M-size group (second group) and the L-size group (third group) may be the same, and the relationship between the swelling compact index and the winding packing index may not be established. In this case, the number of the index-size relationships established in 1 absorbent article series is 2. In contrast to the total number n of size groups being 4, 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 embodiment, the index-size relationship of "S-sized group (first group) > M-sized group (second group) > L-sized group (third group) > Big-sized group (fourth group)" holds for the swelling compact index (first invention) or the winding packing index (second invention). In this case, the number of the index-size relationships established in 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 the sizes, so that the product array is enhanced, and therefore, the absorbent article series of the invention can be used for various purposes (for example, daytime use, night use, outing use, etc.) by wearers having various body shapes, and for a relatively long period accompanied by growth of the body.

In addition, among the plurality of size groups, at least a part of the size groups has a size relationship of "a relatively small size group > a relatively large size group" with respect to the swelling compactness index of the absorbent article (first invention), or a size relationship of "a relatively small size group > a relatively large size group" with respect to the wrapping packing index of the absorbent article (second invention), that is, the size relationship of the absorbent article is opposite to the swelling compactness index (first invention) or the wrapping packing index (second invention) (index size relationship), so that the disposal tape provided in the absorbent article can be used to perform compact and sanitary disposal of the absorbent article after use, which has been swelled by absorption of excreta.

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

In the second aspect of the present invention, from the viewpoint of further reliably exhibiting the above-described effects, it is preferable that the magnitude relation of the "relatively small size group > relatively large size group > 0.6" is established in the magnitude relation of the index magnitude relation, that is, the magnitude relation of the "relatively small size group > relatively large size group > with respect to the wrapping and packaging index of the absorbent article. That is, in the size relation of the wrapping index of the absorbent article, the wrapping index of the absorbent article is preferably 0.6 or more in each of the plurality of size groups constituting the size relation.

In the first and second aspects of the present invention, the sizes of the absorbent articles in the plurality of size groups included in the absorbent article series are not particularly limited, and may be appropriately set according to the use of the absorbent articles, etc., provided that the above-described index size relationship between at least some of the plurality of size groups is established.

For example, when the absorbent article series is an absorbent article for infants (aged 0 to 4 years) and the number of size groups constituting 1 index-size relationship is 2 (when 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 total length in the non-stress longitudinal direction of the absorbent article in the developed and non-extended state in which physiological saline is saturated and absorbed" (hereinafter, sometimes simply referred to as the total length in the non-stress longitudinal direction of the (absorbent article) ") be in the following range.

The total length in the unstressed longitudinal direction of the absorbent articles of the first group is preferably 200mm or more, more preferably 250mm or more, and preferably 400mm or less, more preferably 350mm or less.

The total length in the non-stress longitudinal direction of the absorbent articles of the second group is preferably 250mm or more, more preferably 300mm or more, and preferably 450mm or less, more preferably 400mm or less.

In the case where the absorbent article series is an absorbent article for infants (aged 0 to 4 years) and the number of size groups constituting 1 exponential size relationship is 3, as described above, in the 1 exponential size relationship, "first group < second group < third group" is established, and the third group is a size class having a relatively large size (the group having the largest size of the absorbent articles in the size group constituting the 1 exponential size relationship), the total length of the absorbent articles of the third group in the longitudinal direction under no stress is preferably 300mm or more, more preferably 350mm or more, and preferably 500mm or less, more preferably 450mm or less. The total length in the non-stress longitudinal direction of the absorbent articles of each of the first group and the second group in the case where the number of size groups constituting 1 index-size relationship is 3 may be the same as the value in the case where the number of size groups is 2.

In the first aspect of the invention, the swelling compactness index of each of the absorbent articles in the plurality of size groups included in the absorbent article series is not particularly limited, and may be appropriately set according to the use of the absorbent article, etc., provided that the size relationship opposite to the size relationship is established between at least some of the plurality of size groups as described above.

For example, when the absorbent article series is an absorbent article for infants (aged 0 to 4 years) and the number of size groups constituting 1 index-size relationship is 2 (when the total number of size groups is 2), it is preferable that the swelling compactness index of each of the absorbent articles of the first group and the second group is in the following range.

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

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

In the second aspect of the invention, the wrapping/packaging index of the absorbent article in each of the plurality of size groups included in the absorbent article series is not particularly limited, and may be appropriately set according to the use of the absorbent article, etc., provided that the size relationship opposite to the size relationship is established between at least some of the plurality of size groups as described above.

For example, when the absorbent article series is an absorbent article for infants (aged 0 to 4 years) and the number of size groups constituting 1 index-size relationship is 2 (when the total number of size groups is 2), the wrapping/packaging index of the absorbent articles of each of the first group and the second group is preferably in the following range.

The wrapping index of the absorbent articles of the first group is preferably 0.7 or more, more preferably 0.8 or more, and is preferably 1.5 or less, more preferably 1.2 or less.

The wrapping packing index of the absorbent articles of the second group is preferably 0.6 or more, more preferably 0.7 or more, and is preferably 1.2 or less, more preferably 1.0 or less.

In the case where the absorbent article series is an absorbent article for infants (aged 0 to 4 years) and the number of size groups constituting 1 index-size relationship is 3 or more (the total number of size groups is 3 or more), as described above, in the 1 index-size relationship, "first group < … … < n-1" group < n-th group "holds, the n-th group is a size group having a relatively large size (the group having the largest size of the absorbent articles in the size group constituting the 1 index-size relationship), and the wrapping/packaging index (minimum wrapping/packaging index) of the n-th 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 wrapping packing index can be adjusted by appropriately adjusting the size of the absorbent article (the total length in the non-stress longitudinal direction of the absorbent article in the unfolded and non-stretched state saturated with physiological saline) and the length of the disposal tape in the stretching direction, respectively.

In any of the first and second inventions, the total length in the longitudinal direction (in the present embodiment, the total length in the longitudinal direction X) of the disposal tape 4 in the developed and non-extended state may be the same or different from each other regardless of the total number of size groups, but is preferably the same from the viewpoints of the complexity of material management in which the total length is different and the prevention of the occurrence of the problem that the target wound state cannot be achieved due to material inconsistency.

The "developed and non-extended state" is a state (natural state) in which the disposal tape fixed to the outer surface of the absorbent article is brought into the developed state when the disposal tape is folded like the disposal tape 4, and an external force is not applied to the developed state. The term "same" as used herein refers to a case where the absolute value of the difference between the lengths of the 2 waste tapes in the stretching direction in the natural state is 10mm or less.

In addition, the overall length of the disposal tape 4 in the longitudinal direction in the developed and non-extended state may be the same in all of the plurality of size groups included in the series, not only between the plurality of size groups in which the index-size relationship is established.

In either of the first and second aspects of the invention, the length in the width direction (length in the direction orthogonal to the longitudinal direction, length in the transverse direction Y in the present embodiment, so-called width) of the stretchable portion (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 as or different from each other regardless of the total number of size groups, but as the size increases, the length (width) of the transverse direction Y of the diaper 1 increases, and the width thereof increases, and thus the compact concentrated state can be maintained, so that the size relationship in which the size group smaller in size is smaller than the size group smaller in size is preferably established.

That is, when the total number of size groups is 2 (n=2), the size relationship of "first group+_second group" is preferably 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 with respect to the width in the non-elongated state of the stretchable portion of the disposal tape 4.

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

When the total number of size groups is 3 or more (n.gtoreq.3), among the size groups having the index size relationship of 3 or more, the size relationship of "first group … …. Ltoreq.th (n-1) group. Ltoreq.nth" is preferably established with respect to the width of the stretchable portion of the disposal tape 4 in the non-stretched state.

In addition, not only between the plurality of size groups in which the above-described index 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 in which the size group having a relatively small size is smaller than or equal to the size of the relatively large size may be established with respect to the width of the portion of the disposal tape 4 having stretchability in the non-stretched state.

The stress of the disposal tape 4 fixed to the outer surface of the diaper 1 after the 50% elongation at break was continued for 20 minutes was set to σ50 ₂₀ The stress immediately after 50% elongation of the fracture elongation was set to σ50 ₀ In the case of either of the first invention and the second invention, σ50 is not limited to the total number of the size groups ₂₀ And sigma 50 ₀ Is a ratio sigma 50 of (2) ₂₀ /σ50 ₀ The plurality of size groups in which the above-mentioned index size relationship is established 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 even when the size of the diaper 1 is changed with the change in the body shape of the wearer, and that the occurrence of problems such as breakage of the disposal tape 4 can be prevented.

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

That is, in the case where the total number of size groups is 2 (n=2), it is preferable that the ratio σ50 of the disposal tape 4 is between the first group (size group of relatively small size) and the second group (size group of relatively large size) which are the 2 groups ₂₀ /σ50 ₀ The same applies.

When the total number of size groups is 3 or more (n.gtoreq.3), the ratio σ50 of the disposal tape 4 is preferably set between the size groups having the index size relationship of 3 or more ₂₀ /σ50 ₀ The same applies.

Further, not only between the plurality of size groups having the above-mentioned index-size relationship, but also among all of the plurality of size groups included in the series, the ratio σ50 of the disposal tape 4 ₂₀ /σ50 ₀ The same may be true.

The fracture extensibility of the disposal tape 4 can be controlled by the above<Tensile test>Is measured. Stress sigma 50 ₀ Is the above<Tensile test>The stress σ50 at the time when the test piece (the stretchable portion 8 of the disposal tape 4) is stretched to 50% of the breaking elongation thereof ₂₀ Is to stress sigma 50 ₀ The state of the test piece at the time of measurement was maintained at the time of 20 minutes from the time of measurement. Stress relaxation may be caused when the disposal tape is continuously stretched, but by doing so the stress sigma 50 will be measured ₀ The state of the test piece was maintained for 20 minutes, and stable stress applied to the absorbent article was measured. The degree of stress relaxation in the temperature and humidity environment is different, so that<Tensile test>It is necessary to conduct the process under a certain environment with an atmosphere temperature of 23 + -2 ℃ and a relative humidity of 50 + -5%.

The upper limit of the breaking elongation of the disposal tape 4 is not particularly limited, but is preferably 500mm or less, more preferably 400mm or less, from the viewpoint of preventing deterioration of the feeling of use due to excessive stretching of the disposal tape 4.

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

The disposal tape 4 preferably has a breaking elongation of 100mm or more (preferably 130mm or more, more preferably 150mm or more), and the stress σ50 after the 50% elongation state of the breaking elongation is continued for 20 minutes ₂₀ Stress sigma 50 at 50% elongation just after breaking elongation ₀ More than 20% (preferably more than 30%, more preferably more than 40%) of (satisfies sigma 50) ₂₀ /σ50 ₀ ≥0.2)。

Since the disposal tape 4 satisfying the above conditions of the breaking elongation and stress can continuously exert the contraction force on the inside in the radial direction of the diaper 1 in the state of being rolled up from the time of rolling up the diaper 1 rolled up in the longitudinal direction X, the outer diameter of the diaper 1 rolled up and wound 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, each of the plurality of dimensions included in the absorbent article series includes the plurality of diapers 1 and the packaging container 16 (see fig. 7) in which the plurality of diapers 1 are stored, and when each of the diapers 1 is taken out from the packaging container 16 and placed under no stress, specifically, when in a folded state, it is preferable that the diaper be convexly warped toward the side to which the disposal tape 4 is fixed when the diaper is released and left standing at normal temperature and normal pressure.

In the present embodiment, when the plurality of diapers 1 inside the packaging container 16 are folded in half in the longitudinal direction X with the side portions a (the front portions F) as the inner sides, and the diapers 1 are taken out from the inside of the packaging container 16 and left under no stress, the diapers are bulged toward the back side portion C (the rear portion R side) to which the disposal tape 4 is fixed, in other words, the side portions a (the front portions F) are concavely warped, and the position of the folding line (the central portion in the longitudinal direction X of the diaper 1) becomes the top portion of the bulged portion or the bottom portion of the recessed portion, as shown in fig. 9 (a). 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 bulges toward the fixed side (the outer surface side of the diaper 1) of the disposal tape 4, in other words, warps concavely on the non-fixed side (the inner surface side of the diaper 1) of the disposal tape 4. Therefore, in both the states of fig. 9 (a) and 9 (B), the diaper 1 is easily rolled up in the longitudinal direction X from the non-fixed side of the disposal tape 4 (the crotch portion B side in fig. 9 (a) and the abdomen portion a side in fig. 9 (B)) to the fixed side (the back 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 warping the diaper 1 so as to protrude toward the fixed side of the disposal tape 4 (to be recessed toward the non-fixed side of the disposal tape 4) when the diaper is taken out from the packaging container 16 and placed under a non-stress, there is a method for fixing the elastic member in an elongated state in the longitudinal direction in the region including the central portion (crotch portion) in the non-fixed side of the disposal tape, that is, the inner surface side (skin facing side) of the absorbent article. In this regard, as described above, since the leg gather forming elastic member 15 and the leakage preventing cuff forming elastic member 31 of the diaper 1 of the present embodiment are fixed to the crotch portion B in the longitudinal direction X in an elongated state, they tend to bulge and warp toward the fixed side of the disposal tape 4 when taken out from the packaging container 16 and placed under a non-stress condition. As another example of the above-described method, as shown in fig. 2 and 3, a method can be mentioned in which a portion of the leg gather forming elastic member 15 that overlaps the absorber 23 (the absorbent main body 2) in a plan view (a portion of the elastic member 15 that extends in the crotch portion B in the lateral direction Y) is located closer to the abdomen-side portion a than the center (the longitudinal center line CLx) of the longitudinal direction X of the diaper 1.

In the present embodiment, as described above, since the disposal tape 4 is provided so as to be extendable in the longitudinal direction X with the fixing portion 5 of the outer surface of the diaper 1 as a starting point, the following series of disposal processes can be smoothly performed: the diaper 1 is rolled up in the longitudinal direction X to be in a rolled state, the disposal tape 4 is stretched and rolled up in the rolling direction of the rolled 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 bulged to the fixing side of the disposal tape 4 when taken out from the packaging container 16 and placed under non-stress, and the like, so that the structure can be made compact.

In the present embodiment, as described above, the disposal tape 4 is folded on the outer surface of the diaper 1 when not in use, but referring to fig. 10, the total length L2 of the disposal tape 4 in the longitudinal direction X (the total length of the disposal tape 4 in the longitudinal direction in the unfolded and non-extended state) when the disposal tape 4 is unfolded in the longitudinal direction X is preferably 4 or less, more preferably 3 or less, with respect to the total length L1 of the diaper 1 in the longitudinal direction X under no stress, without expanding and contracting the disposal tape 4. By establishing the size relationship of "L2/L1 is equal to or less than 0.4", the shrinkage force of the disposal tape 4 when the disposal tape 4 is stretched and wound in the winding direction of the diaper 1 can be made relatively strong with respect to the diaper 1 wound up and rolled up 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 26 is formed in the absorbent core 24 of the absorber 23, and has an opening in the skin-facing surface of the absorber 23 (absorbent core 24).

In the present embodiment, the groove 26 has a rectangular shape in plan view, and 1 groove is formed in the crotch portion B at the center portion in the lateral direction Y of the absorber 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 so as to be curved on the premise of extending in the longitudinal direction X.

In the present embodiment, in the groove 26, the skin-side core-wrap 25 covering the skin-facing surface of the absorbent core 24 and the non-skin-side core-wrap 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 no material (water-absorbent material such as wood pulp or water-absorbent polymer) forming the absorbent core 24 is present. The term "no formation material" as used herein includes not only a mode in which no formation material is present at all but also a mode in which a very small amount of formation material is present to the extent that it can be recognized as a space portion. That is, the groove 26 may be a penetrating type penetrating the absorbent core 24 in the thickness direction, or a non-penetrating type not penetrating the absorbent core 24 in the thickness direction. The through-type groove 26 has openings on both the skin-facing surface and the non-skin-facing surface of the absorber 23 (absorbent core 24). The non-penetrating groove 26 may have an opening on the skin-facing surface of the absorber 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 accumulating apparatus, similarly to the method for manufacturing the absorbent core of the absorbent article. Typically, the fiber accumulating apparatus includes a rotary drum having an accumulating concave portion 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, and the core forming material is accumulated in the accumulating concave portion by suction from a bottom surface of the accumulating concave portion, and a fiber accumulating in the accumulating concave portion is released from the accumulating concave portion by suction from a suction mechanism disposed opposite to the accumulating concave portion and transferred to the suction mechanism. In the fiber accumulating apparatus having such a configuration, by disposing the air impermeable member, or the like on a part of the air permeable bottom surface of the accumulation recess, a part of the bottom surface is made air impermeable or air impermeable, so that the core forming material is less likely to accumulate fibers in the air impermeable or air impermeable portion when the core forming material is accumulating fibers, and the amount of fibers accumulated in the air impermeable or air impermeable portion is smaller than that in other parts of the bottom surface. By this, the absorbent core 24 having the groove 26 can be obtained by manufacturing the absorbent core by a conventional method using the fiber accumulating apparatus having the rotary drum in which a part of the bottom surface of the concave portion for accumulation is the air-impermeable portion or the air-impermeable portion, and the portion corresponding to the air-impermeable portion or the air-impermeable portion becomes the groove 26.

Alternatively, after the absorbent core 24 having no groove portions 26 is manufactured according to a conventional method, a part or all of the core forming material of the groove portions 26 in the absorbent core 24, which forms the predetermined portions, is removed, thereby obtaining the absorbent core 24 having the groove portions 26.

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

In the absorbent body 23, if the groove 26, which does not disappear even when the absorbent body 23 is saturated with liquid, extends in the longitudinal direction X, the formation position of the groove 26 in the diaper 1 in the rolled state becomes shorter than other portions when the diaper 1 after use, which has absorbed and retained excrement, is rolled up in the longitudinal direction X, and the formation position of the groove 26 becomes easier to be engaged with when the disposal tape 4 is unrolled and rolled up in the diaper 1 in the rolled state, and the rolling becomes easier. Further, since the disposal tape 4 is wound around a portion having a short outer circumference in the diaper 1 in a gathered state, the swelling compactness index and the winding packing index become large, and the disposal form becomes more compact.

From the viewpoint of further reliably exhibiting the above-described operational effects of the groove 26 (for example, the reduction in the size of the disposal form of the diaper 1), the groove 26 is preferably located on an imaginary straight line (in the illustrated embodiment, the lateral center line CLy) extending in the longitudinal direction X through the fixing portion (fixing portion 5) of the disposal tape 4 with the outer surface of the diaper 1, as shown in fig. 2 and 3.

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

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

When the width W0 of the groove 26 varies in the depth direction of the groove 26 and is uneven, the width (length in the lateral direction Y) of the opening of the groove 26 is set to be the width W0. When the width W0 of the groove 26 varies unevenly in the longitudinal direction (longitudinal direction X) of the groove 26, the maximum width is set to be the width W0.

The width W1 of the disposal tape 4 is the width (length in the direction perpendicular to the stretching direction) at the time when the test piece (the stretchable portion 8 of the disposal tape 4) is stretched to 50% of the breaking elongation in the < stretching test >.

Fig. 12 shows a schematic structure of a diaper 1A as another embodiment of an absorbent article of the present invention. The diaper 1A will be mainly described in terms of a structure different from that of the diaper 1 described above, and the same reference numerals are given to the same structure, and the description thereof will be omitted. The description of the diaper 1 is appropriately applied to a structure not specifically described in the diaper 1A.

In the diaper 1A, as shown in fig. 12 (a), 2 groove portions 26 are formed in the portion of the absorber 23 (absorbent core 24) located in the crotch portion B. The 2 grooves 26, 26 are formed symmetrically with respect to the lateral center line CLy (see fig. 2) at a predetermined distance apart in the lateral 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 form a disposal form, the disposal tape 4 can be engaged with one of the 2 groove portions 26, 26. The diaper 1A can also have the same effect as the diaper 1. In particular, since the diaper 1A has the plurality of grooves 26, the engagement of the disposal tape 4 with the grooves 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 appropriately modified.

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 disposal tape 4 may be in a two-folded state, for example, provided that the free portion 6 (the fixed portion 7 and the stretchable portion 8) can protrude outward in the lateral direction Y from the fixed portion 5. As the disposal tape 4 in a folded state, for example, the following can be exemplified: the fixing portion 5 (fixing portion sheet 50) is folded back toward the stretchable portion 8 at one end (inner end in the lateral direction Y) in the longitudinal direction thereof to form a folded portion 50', and the folded portion 50' is joined to the second surface 80b at one end (inner end in the lateral direction Y) in the longitudinal direction of the stretchable portion 8 (stretchable portion sheet 80), and the fixing portion 5 and the stretchable portion 8 are directly connected to each other, and further, the fixing portion 7 (fixing portion sheet 70) is directly connected to the other end (outer end in the lateral direction Y) in the longitudinal direction of the stretchable portion 8 (stretchable portion sheet 80).

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

Some of the above embodiments can be used as appropriate in all embodiments.

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

<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 the sizes,

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

regarding the swelling compactness index of the absorbent article measured by the following method, the following size 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,

measurement method of swelling compact index

After the absorbent article to be measured is saturated with physiological saline in an atmosphere having an atmospheric temperature of 23.+ -. 2 ℃ and a relative humidity of 50.+ -. 5%, the inner surface of the absorbent article in the developed state is wound up in the longitudinal direction with the inner surface thereof as the inner side, the peripheral length C1 in the winding-up direction is measured, the waste tape fixed to the outer surface of the wound absorbent article is stretched to a state of 50% of the elongation at break, the waste tape is wound around the outer surface of the absorbent article in the winding-up direction of the absorbent article, after being left to stand for 20 minutes in this state, the peripheral length C2 of the portion of the absorbent article around which the waste tape is wound is measured, and the swelling compactness index of the absorbent article to be measured is calculated by the following formula,

Swelling compact index=1- (C2/C1).

<2>

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

<3>

The series of absorbent articles of the above < 1 > or < 2 > wherein the number of size groups constituting 1 of the size relationships is 2, and the swelling compactness index of the absorbent articles of the relatively large size group (second group) is 0.05 or more and 0.5 or less, preferably 0.1 or more and 0.3 or less.

<4>

The absorbent article series according to any one of < 1 > - < 3 > described above, wherein the number of size groups constituting 1 size relationship is 3 or more, and the swelling compactness index (minimum swelling compactness index) of a size group (minimum swelling compactness index) having the largest size of the absorbent articles among a plurality of size groups of 3 or more is 0 or more and 0.4 or less, preferably 0.05 or more and 0.2 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 the sizes,

The plurality of absorbent articles each have: an absorber having a longitudinal direction corresponding to the front-back direction of the wearer and a transverse direction orthogonal to the longitudinal direction for absorbing and retaining body fluid; and a disposal tape fixed to the outer surface of the absorbent article and having stretchability,

regarding the wrapping and packaging index of the absorbent article measured by the following method, the following size 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,

method for measuring winding packing index

After the absorbent article to be measured is saturated with physiological saline at an atmospheric temperature of 23.+ -. 2 ℃ and a relative humidity of 50.+ -. 5%, the inner surface of the absorbent article in the developed state is rolled up in the longitudinal direction with the inner surface as the inner side, the outer circumferential length C1 in the rolling direction is measured, and the total length T50 in the extending direction of the disposal tape when the disposal tape fixed to the outer surface of the absorbent article to be measured is extended to 50% of the breaking extension is measured, and the rolling packing index of the absorbent article to be measured is calculated by the following formula,

winding packing index=t50/C1.

<6>

The absorbent article series of < 5 > described above, wherein, in the size relationship, a size relationship of a size group having a relatively small size > a size group having a relatively large size is established.

<7>

The series of absorbent articles of < 5 > or < 6 > described above, wherein the number of size groups constituting 1 of the size relationships is 2, and the wrapping index of the absorbent articles of the size group (first group) of the relatively small size is 0.7 or more and 1.5 or less, preferably 0.8 or more and 1.2 or less.

<8>

The absorbent article series according to any one of < 5 > - < 7 > described above, wherein the number of size groups constituting 1 of the size relationships is 2, and the wrapping/packaging 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 < 5 > - < 8 > described above, wherein the number of size groups constituting 1 size relationship is 3 or more, and the wrapping/packaging index (minimum wrapping/packaging index) of a size group (minimum wrapping/packaging index) of the absorbent article having the largest size among a plurality of size groups of 3 or more is 0.5 or more and 1.0 or less, preferably 0.6 or more and 0.9 or less.

<10>

The absorbent article series according to any one of < 1 > - < 9 > described above, 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 total number of the size groups > the relationship of the number of the size groups constituting 1 of the index size relationships holds).

<11>

The absorbent article series according to any one of < 1 > - < 9 > described above, 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 total number of the size groups=the relationship of the number of the size groups constituting 1 of the index-size relationships holds).

<12>

The absorbent article series according to any one of < 1 > - < 11 > described above, wherein the total length of the disposal tape in the longitudinal direction in the developed and non-extended state is the same as each other in the plurality of size groups in which the size relationship is established.

<13>

The absorbent article series according to any one of < 1 > - < 12 > described above, wherein, regarding the length in the width direction of the stretchable portion of the disposal tape in the non-stretched state, the following size relationships among the plurality of size groups for which the size relationship is established are established: the size group with relatively small size is smaller than or equal to the size group with relatively large size.

<14>

The absorbent article series according to any one of < 1 > - < 13 >, wherein the waste tape has a stress of σ50 after the 50% elongation state of the breaking elongation is continued for 20 minutes ₂₀ The stress immediately after the elongation at break of 50% is set as sigma 50 ₀ In the case of sigma 50 ₂₀ And sigma 50 ₀ Is a ratio sigma 50 of (2) ₂₀ /σ50 ₀ The plurality of size groups for which the size relationship holds are identical to each other.

<15>

The absorbent article series according to any one of < 1 > - < 14 > wherein the disposal tape has a breaking elongation of 100mm or more and a stress after a 20 minute duration of 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.

<16>

The absorbent article series according to any one of < 1 > - < 15 >, wherein each of the plurality of sizes includes a plurality of the absorbent articles and a packaging container for storing the plurality of the absorbent articles therein,

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

<17>

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

<18>

The absorbent article series of < 17 > described 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 with respect to the total length of the longitudinal direction of the absorbent article under no stress.

<19>

The series of absorbent articles of < 17 > or < 18 > described above, 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 the liquid.

<20>

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

<21>

The absorbent article series of < 19 > or < 20 > described above, wherein a ratio of a length of the waste belt in a direction orthogonal to the elongation direction in a 50% elongation state of the breaking elongation of the portion having stretchability in the longitudinal direction to a length of the groove portion in the absorbent article saturated with the physiological saline is 1.5 or less.

<22>

The absorbent article series according to any one of < 1 > - < 21 >, wherein the absorbent article is a pants-type absorbent article comprising: a crotch portion disposed in a crotch portion of a wearer; an abdomen-side portion disposed on the abdomen-side of the wearer than the crotch portion; and a back portion disposed closer to the back side of the wearer than the crotch portion, wherein the pants-type absorbent article has a side seal portion formed by joining the side edge portions of the abdomen portion and the back portion to each other along the longitudinal direction.

<23>

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

in the unfolded and extended state of the absorbent article, the length of the upper stretchable region in the longitudinal direction is 10% to 70%, preferably 20% to 50%, of the length of the side seal portion in the longitudinal direction.

Hereinafter, 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

Various pants-type disposable diapers having the same basic structure as the diaper 1 are manufactured in different sizes. The absorbent body of the manufactured diaper has a front sheet, an absorber, and a back sheet in this order from the skin of the wearer. As the front sheet, a sheet having a grammage of 25g/m was used ² Hydrophilic hot air non-woven fabrics. As the back sheet, a sheet having a gram weight of 18g/m on the skin-facing side was used ² Is composed of polyethylene resin film with gram weight of 17g/m on the non-skin-facing side ² A laminate of a resin film comprising a hydrophobic spun-bonded nonwoven fabric and a nonwoven fabric. As the absorbent body, an absorbent body including an absorbent core in which water-absorbent polymer particles are supported on a fiber-assembled body of wood pulp and a core-spun sheet made of a nonwoven fabric covering the outer surface of the absorbent core is used. However, the absorber does not have the groove 26 as described above.

From among the produced various diapers, 2 kinds of absorbent articles having different sizes were selected, and absorbent article series of examples and comparative examples were produced. Each manufactured absorbent article series is divided into 2 size groups, a first group containing only diapers of relatively small size, and a second group containing only diapers of relatively large size. The "dimension" referred to herein is the entire length in the longitudinal direction of the diaper in the developed and unstretched state in which the diaper is saturated with and absorbs physiological saline, as described above.

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

For each of examples and comparative examples, "compactness of waste form" and "sanitation of waste form" were evaluated by the following methods, and the results are shown in table 1.

Method for evaluating compactness of waste form

For 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 group, and the disposal tape was wound in a state of being stretched to about 50% of the breaking elongation to form disposal diapers in the group. The diapers in the waste form formed in the same manner were observed for the diapers having different sizes, and were evaluated according to the following evaluation criteria. The results were the average of the evaluation points of 10 members, and are shown in table 1.

A: the diapers in the waste form are perceived as compact in all of the size groups included in the series, and the diapers in the waste form in the size groups having relatively small size and large swelling compact index or winding packing index are more compact than those in the size groups having relatively large size and small swelling compact index or winding packing index.

B: the diapers in the waste form were perceived as compact in all the size groups included in the series, but the diapers in the waste form were not perceived as different in compactibility from one size group included in the series to another.

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

In addition, in the evaluation criterion concerning the compactness of the waste form, the difference in the compactibility of the waste form of the diapers of the relatively small size group (first group) and the relatively large size group (second group) is evaluated in addition to the compactibility of the waste form of all the diapers included in the series, reflecting the needs of the general user. In the latter case, the disposable diapers are generally small-sized diapers for use at a low age of months, and the number of times of replacement per 1 day is increased as the frequency of excretion of the diaper wearer increases, so that the number of diapers in the form of disposal tends to increase, and therefore, it is particularly strongly desired for a relatively small-sized diaper for general users that each 1 diaper can be disposed of compactly. In consideration of this, in the above-described evaluation criterion, whether or not diapers in a waste form are compact in a size group having a relatively small size as compared with other size groups is regarded as an evaluation item.

Method for evaluating the sanitation of waste forms

For 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 group, wound the disposal tape around the rolled up diaper in a state of being elongated to about 50% of the elongation at break to form a disposal diaper, and observed the disposal diapers formed similarly for the diapers having different sizes, and evaluated according to the following evaluation criteria. The results were the average of the evaluation points of 10 members, and are shown in table 1.

A: in all the size groups included in the series, the waste tape was perceived to be firmly wound around the diaper, and excrement was less likely to leak out from the gap of the diaper in the waste form, and excrement was less likely to leak out from the gap in the size group having a relatively small size and a large swelling compact index or a large winding packing index than in the size group having a relatively large size and a small swelling compact index or a small winding packing index.

B: in all the size groups included in the series, the waste tape was perceived to be firmly wound around the diaper, and excrement was not likely to leak out from the gaps of the diapers in the waste form, but there was no perceived difference in the degree to which excrement was not likely to leak out from the gaps between the size groups included in the series.

C: the series includes a size group in which no excrement is perceived to be unlikely to leak out of the gap of the diaper in the waste form.

In addition, the above-described criteria for evaluating the sanitation of the waste form reflect the needs of the general user, and the difference in sanitation between the size group (first group) having a relatively small size and the size group (second group) having a relatively large size is evaluated in addition to the sanitation (difficulty in leakage of excrement) of the waste form of all diapers included in the series. In the latter case, since the lower the viscosity of excrement (particularly feces) of a diaper wearer, the higher the flowability is, the more likely the disposable diaper is to be a small-sized diaper for a low month age, and thus the more likely the excrement tends to leak out of the disposable diaper, it is highly desired that such a problem is not generated particularly for a diaper having a relatively small size by a general user. In consideration of this point, the evaluation criterion is to determine whether or not a size group having a relatively small size is excellent in sanitation in a waste form as compared with other size groups.

TABLE 1

As shown in table 1, in each example, the size relationship of "first group < second group" was established with respect to the size of the absorbent article (the total length in the longitudinal direction under no stress, that is, the total length in the longitudinal direction under no stress of the absorbent article in the developed and non-elongated state in which the absorbent article was saturated with the physiological saline, and the relationship of "first group > second group" with respect to the size relationship of the absorbent article opposite to the size of the absorbent article was established with respect to both the swelling compact index and the winding packing index, so that the compactness and the hygienic property of the waste form were superior to those of each comparative example in which both the swelling compact index and the winding packing index were the same size relationship as the absorbent article.

In example 1, the waste tapes were identical in the first and second groups, in example 2, the "lengths" of the waste tapes were different in the first and second groups, and in example 3, the "widths" of the waste tapes were different in the first and second groups.

Industrial applicability

According to the present invention, there is provided an absorbent article series capable of compactly and hygienically disposing of an absorbent article after use, regardless of the use and the change in the behavior of bodily waste that grows.

Claims (20)

1. An absorbent article series for infants and children of different ages in months, comprising a plurality of absorbent articles of 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 characterized in that:

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

regarding the swelling compactness index of the absorbent article measured by the following method, the following size 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 absorber has a groove portion extending in the longitudinal direction, the groove portion does not disappear even if the absorber is saturated with liquid,

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

the ratio of the length of the waste tape in the direction perpendicular to the elongation direction in a 50% elongation state of the breaking elongation of the portion having stretchability in the longitudinal direction to the length of the groove portion in the absorbent article saturated with physiological saline is 1.5 or less,

Measurement method of swelling compact index

After the absorbent article to be measured is saturated with physiological saline in an atmosphere having an atmospheric temperature of 23.+ -. 2 ℃ and a relative humidity of 50.+ -. 5%, the inner surface of the absorbent article in the developed state is wound up in the longitudinal direction with the inner surface thereof as the inner side, the peripheral length C1 in the winding-up direction is measured, the waste tape fixed to the outer surface of the wound absorbent article is stretched to a state of 50% of the elongation at break, the waste tape is wound around the outer surface of the absorbent article in the winding-up direction of the absorbent article, after being left to stand for 20 minutes in this state, the peripheral length C2 of the portion of the absorbent article around which the waste tape is wound is measured, and the swelling compactness index of the absorbent article to be measured is calculated by the following formula,

swelling compact index=1- (C2/C1).

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

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

3. The array of absorbent articles according to claim 1 or 2, characterized in that:

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

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

the number of size groups constituting 1 of the size relationships is 3 or more, and the swelling compactness index of the size group having the largest size of the absorbent articles among the plurality of size groups of 3 or more is 0 or more and 0.4 or less.

5. An absorbent article series for infants and children of different ages in months, comprising a plurality of absorbent articles of 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 characterized in that:

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

regarding the wrapping and packaging index of the absorbent article measured by the following method, the following size 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 absorber has a groove portion extending in the longitudinal direction, the groove portion does not disappear even if the absorber is saturated with liquid,

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

the ratio of the length of the waste tape in the direction perpendicular to the elongation direction in a 50% elongation state of the breaking elongation of the portion having stretchability in the longitudinal direction to the length of the groove portion in the absorbent article saturated with physiological saline is 1.5 or less,

method for measuring winding packing index

After the absorbent article to be measured is saturated with physiological saline at an atmospheric temperature of 23.+ -. 2 ℃ and a relative humidity of 50.+ -. 5%, the inner surface of the absorbent article in the developed state is rolled up in the longitudinal direction with the inner surface as the inner side, the outer circumferential length C1 in the rolling direction is measured, and the total length T50 in the extending direction of the disposal tape when the disposal tape fixed to the outer surface of the absorbent article to be measured is extended to 50% of the breaking extension is measured, and the rolling packing index of the absorbent article to be measured is calculated by the following formula,

Winding packing index=t50/C1.

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

in the size relation, the size relation that the size group with a relatively small size is larger than the size group with a relatively large size is larger than or equal to 0.6 is established.

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

the number of size groups constituting 1 of the size relationships is 2, and the wrapping/packing index of the absorbent article of the size group having the 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, wherein:

the number of size groups constituting 1 of the size relationships is 2, and the wrapping/packing index of the absorbent article of the size group having the relatively large size is 0.6 or more and 1.2 or less.

9. The array of absorbent articles according to claim 5 or 6, wherein:

the number of size groups constituting 1 of the size relationships is 3 or more, and the wrapping/packaging index of the size group having the largest size of the absorbent articles among the plurality of size groups of 3 or more 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, wherein:

the total length of the disposal tape in the longitudinal direction in the developed and non-extended state is the same as that of the plurality of size groups in which the size relationship is established.

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

regarding the length in the width direction of the portion having stretchability in the non-extended state of the disposal tape, the following size relationship is established among the plurality of size groups in which the size relationship is established: the size group with relatively small size is smaller than or equal to the size group with relatively large size.

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

for the disposal tape, the stress after the 50% elongation state of the breaking elongation was continued for 20 minutes was set to σ50 ₂₀ The stress immediately after the elongation at break of 50% is set as sigma 50 ₀ In the case of sigma 50 ₂₀ And sigma 50 ₀ Is a ratio sigma 50 of (2) ₂₀ /σ50 ₀ The plurality of size groups for which the size relationship holds are identical to each other.

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

the waste tape has a breaking elongation of 100mm or more, and a stress after a 20 minute duration of 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.

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

the plurality of sizes respectively include a plurality of the absorbent articles and a packaging container for accommodating the plurality of absorbent articles therein,

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

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 expandable in the longitudinal direction with a fixing portion to an outer surface of the absorbent article as a starting point in 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 from the folded state without being stretched is 4 or less with respect to the total length of the disposal tape in the longitudinal direction under no stress of the absorbent article.

19. The array of absorbent articles according to any one of claims 1 to 18, wherein:

the absorbent article is a pants-type absorbent article, and the pants-type absorbent article comprises: a crotch portion disposed in a crotch portion of a wearer; an abdomen-side portion disposed on the abdomen-side of the wearer than the crotch portion; and a back portion disposed closer to the back side of the wearer than the crotch portion, wherein the pants-type absorbent article has a side seal portion formed by joining the side edge portions of the abdomen portion and the back portion to each other along the longitudinal direction.

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

the absorbent article has a stretchable region having stretchability in the lateral direction, the stretchable region including an upper stretchable region on the waist opening side and a lower stretchable region on the crotch side,

In the unfolded and extended state of the absorbent article, the length of the upper stretchable region in the longitudinal direction is 10% to 70% of the length of the side seal portion in the longitudinal direction.

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