RU2639969C1 - Pulled absorbing product - Google Patents

Abstract

FIELD: human vital needs satisfaction.

SUBSTANCE: pulled absorbing product (1) comprises a front sheet element, a back-sheet element, and an absorbing node, and in each of the two side parts of the absorbing node includes the first leakage protecting cuff (34) having a free end positioned inside from the side edge of the absorbing element (33), and the second leakage protecting cuff (37), which runs outside from the side edge of the absorbing element (33). The upper sheet (31) and the first leakage protecting cuff (34) in each case include turned-back parts (31c), which are folded back in the direction not facing the skin side of the surface facing the skin side of the surface of the absorbing element (33). The sheet material (35), which forms the first leakage protecting cuff (34), includes an upper locking part (35u) attached to the upper sheet (31), and a lower locking part (35d) attached to the lower sheet in the provisions inside from the side edge on the surface of the absorbing element (33) not facing the skin side. The length L1, the length L2, the distance L3, and the distance L4 satisfy the following expressions: (1) L1≤L2; (2) L2≤L1+L3; and (3) L3≤L4.

EFFECT: increased leakage protection.

38 cl, 5 dwg

Description

FIELD OF THE INVENTION

[0001]

The present invention relates to a stretchable absorbent article.

State of the art

[0002]

There is a well-known traditional stretchable absorbent article, which includes: an hourglass-shaped outer coating extending on the front part which is intended to be located on the front side of the user, the crotch part, which is intended to be located on the crotch area of the user, and the rear part, which is intended location on the back of the user; and an absorbent assembly fixed on the inside of the surface of the outer cover, in which two side edge portions in the front of the outer cover and two side edge portions in the rear of the outer cover are connected to form a pair of side sealing portions, waist openings and a pair of leg openings.

In addition, another type of traditional stretchable absorbent article is known, which is a stretchable absorbent article comprising an outer cover divided into front and back portions, in which the outer cover includes: two separate sheet elements, including a front sheet element, which is intended for location on the front side of the user, and the rear sheet element, which is designed for location on the rear side of the user; and an absorbent assembly attached so that it connects the front sheet element and the rear sheet element, and the two transverse side edge parts of the front sheet element and the two transverse side edge parts of the back sheet element are connected to form a pair of side sealing parts (see, for example, patent document 1).

[0003]

In addition, in order to prevent leakage of the absorbent article to be pulled from the leg openings, there is a known technology according to which leak-proof cuffs that rise towards the skin of the user are located in the crotch portion. There is also a well-known technology, according to which double leak-proof cuffs are located on both sides of the crotch part (see patent documents 2 and 3).

List of references

Patent Literature

[0004]

Patent Document 1: Japanese Patent Application No. JP 2014-195631A

Patent Document 2: Japanese Patent Application No. JP 2006-341061A

Patent Document 3: Japanese Patent Application No. JP 2012-61138A

SUMMARY OF THE INVENTION

[0005]

The present invention provides a stretchable absorbent article comprising a front sheet member that is designed to be located on the front side of the user, a rear sheet member that is designed to be located on the back side of the user, and an elongated absorbent assembly that is fixed to overlap the front sheet member and the back sheet element, and the front sheet element and the rear sheet element are connected to form a pair of side sealing parts, openings for tal and pairs of leg openings. The absorbent assembly includes a top sheet that forms a liquid absorbent surface and is capable of holding a liquid absorbent element, and also includes, in each of the two side portions along the longitudinal direction of the absorbent assembly, a first leakproof cuff having a free end that is located inside from the side the edge of the absorbent element, and a second leak-proof cuff that extends outside the side edge of the absorbent element. The top sheet and the first leakproof cuff in each case include backwardly turned parts outside of the two side edges of the absorbent element, each backwardly turned part is folded back to the non-skin side of the surface from the skin surface of the absorbent element. The sheet material that forms the first leakproof cuff includes: an upper fixing part attached to the upper sheet and a lower fixing part attached to the lower sheet, the upper fixing part and the lower fixing part being in positions separated by a gap in the transverse direction inside from each of the two side edges of the absorbent element on the non-skin side of the surface of the absorbent element. A stretchable absorbent article satisfies all of the following relationship expressions (1) to (4):

(1) L1 L L2;

(2) L2 L L1 + L3;

(3) L3≤L4; and

(4) L4≤L1 + L3,

where L1 is the length from the backward-turned portion of the first leak-proof cuff to the free end of the first leak-proof cuff, L2 is the length of the second leak-proof cuff that extends from the backward-turned portion of the first leak-proof cuff to the free end of the second anti-leakage cuff leakage, L3 represents the distance between the backwardly turned portion of the first cuff leakage protection and the lower fixing part, and L4 represents the distance between Do not turn back part of the top sheet and upper retaining part.

Brief Description of the Drawings

[0006]

FIG. 1 is a perspective view of a pull-on disposable diaper according to an embodiment of the present invention in a state of use (in a state of wear).

FIG. 2 is a partial cross-sectional top view of the pull-on disposable diaper illustrated in FIG. 1, in the expanded and uncompressed state. As used herein, the term “expanded and uncompressed state” means a state in which the stretchable absorbent article is deployed by separating the connected parts (side sealing portions) on both sides of the diaper, and the expanded stretchable absorbent article is stretched to its design dimensions (which are the same as the dimensions of a stretched absorbent product when it is flattened, without taking into account the influence of elastic elements) by stretching the elastic ny elements of the constituent elements.

FIG. 3 is an enlarged cross-sectional view taken along line III-III, as shown in FIG. 2.

FIG. 4 is a cross-sectional image of a corresponding portion drawn in the transverse direction of the product in the position indicated by the straight line Pa, as shown in FIG. 2.

FIG. 5 is a plan view of absorbent cores illustrating fiber-free side formation options.

Description of Embodiments

[0007]

In a stretchable absorbent article including a split type outer coating, when the mass of the crotch portion increases as a result of absorption of the liquid, the crotch portion sags and a gap is created between the leg openings and the legs of the user. As a result, leakage becomes probable, or anxiety regarding leakage becomes probable, even if leakage does not occur.

In order to prevent the formation of a gap around the legs, the crotch part may have a configuration with an increased width. However, this configuration can reduce the ease of introducing the legs through the leg openings, and it becomes likely that the user will experience inconvenience in the crotch.

Patent Document 1 also describes a pull-on diaper in which a crotch panel attached so that it connects the front panel and the rear panel includes an absorbent body fluid and leg valves that extend along the body absorbent body and include an outer region and an inner region area, and elastic elements for the legs are located in the outer area. In addition, as described, leak-proof walls configured to be raised toward the skin of the wearer are formed on the inner surface of the crotch panel, in addition to leg valves having elastic legs. However, Patent Document 1 describes that the distance from the main edge portion to the free edge portion of the leakproof wall is less than the distance from the proximal edge of the body absorbing body portion to the outer region of the foot valve (see claim 7 and FIG. 6). In this case, despite the fact that it turns out to be easy to introduce the legs through the openings for the legs, which protect against leakage of the wall, do not have a sufficient height. Accordingly, it cannot be said that the diaper described in Patent Document 1 is satisfactory in order to prevent leakage and eliminate leakage anxiety.

[0008]

In addition, if the technologies described in Patent Documents 2 and 3 apply to stretchable absorbent articles including a separate outer coating, it cannot be said that the resulting stretchable absorbent articles are satisfactory for simultaneously achieving the goals of ease of introducing legs through leg openings and address leakage concerns.

[0009]

Accordingly, it is an object of the present invention to provide a stretchable absorbent article that can overcome the disadvantages of the conventional technologies described above.

[0010]

Hereinafter, a stretchable absorbent article according to preferred embodiments of the present invention will be described with reference to the drawings.

The pull-on disposable diaper 1 according to an embodiment of the present invention (hereinafter also referred to as “diaper 1”) includes, as illustrated in FIG. 1 and 2, the front sheet element 2A, which is intended to be positioned on the front side of the user when the diaper is in a wearing state, the rear sheet element 2B, which is intended to be positioned on the rear side of the user, and an elongated absorbent assembly 3 that is fixed to overlap front sheet element 2A and rear sheet element 2B. The front sheet element 2A and the rear sheet element 2B are connected to form a pair of side sealing portions 4 and 4, openings for the waist 5 and a pair of openings for the legs 6 and 6.

As illustrated in FIG. 1 and 2, the diaper 1 includes a front part A, which is intended to be positioned on the front side of the user when the diaper is in a wearing state, a rear part B, which is intended to be positioned on the rear side of the user, and a crotch part C, which is located between the front part and the back of B and is intended to be located on the user's crotch area.

In addition, the side sealing portions of the diaper 1 are formed by attaching two side edge portions 2a and 2a of the front sheet element 2A and two side edge portions 2b and 2b of the rear sheet element 2B to each other by a known joining method, such as heat welding.

[0011]

The diaper 1 has a longitudinal direction X of the product and a transverse direction Y of the product. In a stretchable absorbent article, such as a diaper, the longitudinal direction X of the article indicates a direction corresponding to the anteroposterior direction of the user, and in a stretchable absorbent article, such as a diaper, the transverse direction Y of the article indicates a direction perpendicular to the direction corresponding to the anteroposterior direction of the user. In the diaper 1, as indicated by the letter X in FIG. 2, the longitudinal direction X of the article is a direction that passes through the front part A, the crotch part C and the back part B, and as indicated by the letter Y in FIG. 2, the transverse direction Y of the article is a direction perpendicular to the longitudinal direction X of the article in the unfolded and uncompressed state.

[0012]

As used herein, the term “skin-facing surface” means the surface of the absorbent article or its constituent elements that faces the skin of the user while wearing the absorbent article, and the term “non-skin-facing surface” means the surface of the absorbent article or its constituent elements that is facing to the side (clothing side), opposite with respect to the skin of the user in the process of wearing an absorbent product.

[0013]

Next, the diaper 1 will be described in more detail. The front sheet element 2A has a length La in the longitudinal direction X of the article, which is the same as the length LS of the side seal portions 4 in the same direction. The front sheet element 2A includes a main body 20a having lateral sealing parts 4 and 4 on both transverse sides, and does not include an additional part that extends from the main body 20a toward the crotch part C. On the other hand, the rear sheet element 2B has a length Lb, in the longitudinal direction X of the article, which is more than the length LS of the side sealing parts 4 in the same direction. Accordingly, the back sheet member 2B includes a main body 20b having side sealing parts 4 and 4 on both transverse sides, and an additional part 21b that extends from the main body 20b toward the crotch part C and does not include side sealing parts 4 and 4 on both transverse sides. Hereinafter, the main body 20a of the front sheet element 2A will also be referred to as the “front main body 20a”, and the main body 20b and the additional part 21b of the rear sheet metal 2B will also be called the terms “rear main body 20b” and “rear additional body 21b "Respectively.

[0014]

As illustrated in FIG. 2, the front sheet element 2A and the rear sheet element 2B of the diaper 1 in each case have a rectangular shape when viewed from above and, more specifically, a rectangular shape in which the length in the transverse direction Y of the article is more than the length in the longitudinal direction X of the article.

[0015]

As illustrated in FIG. 4, the front sheet element 2A and the rear sheet element 2B of the diaper 1 in each case consist of an outer sheet 22 that forms the outer surface of the diaper, an inner sheet 23 that is located on the skin side of the surface of the outer sheet 22, and a plurality of thread-like elastic elements 24 which are located between the sheets 22 and 23 so that they are separated by a gap from each other in the longitudinal direction X of the product. As illustrated in FIG. 2, the front sheet element 2A includes a stretch portion at the waist G1 and a stretch portion below the waist G2, and the rear leaf element 2B includes a stretch portion at the waist G1, a stretch portion below the waist G2 and a stretch portion of the additional portion G3.

[0016]

The stretch portion at the waist G1, the stretch portion below the waist G2, and the stretch portion of the additional portion G3 elastically stretch in response to compression of the elastic members 24 that are located between the two sheets 22 and 23 in the stretched state.

In each of the front sheet element 2A and the rear sheet element 2B, a stretch portion at the waist G1 is formed in an outer position relative to the longitudinal end portion of the absorbent assembly 3 in the longitudinal direction X of the article. In each of the front sheet element 2A and the rear sheet element 2B, the stretch portion below the waist G2 is formed in a position closer to the crotch portion C in the longitudinal direction X of the product than the stretch portion on the waist G1. The stretch portion of the supplemental portion G3 is formed in the rear supplemental portion 21b. It is preferable that the stretch portion at the waist G1, the stretch portion below the waist G2, and the stretch portion of the additional portion G3 are capable of stretching at least in portions external to the two side edges of the absorbent member 33 in the transverse direction Y of the article.

In addition, it is preferable that the elastic elements 24, which form the stretch part below the waist G2 and / or the stretch part of the additional part G3, in overlapping parts where the elastic element 24 overlaps the transverse central part of the absorbent element 33, are subjected to heat treatment to reduce their elasticity or are cut so that the elastic members 24 do not cause the front sheet member 2A and the rear sheet member 2B to be compressed.

[0017]

The two sheets 22 and 23, which make up the front sheet element 2A and the rear sheet element 2B, can be attached to each other almost completely by means of a binder, or they can be attached to each other in a plurality of connected parts dispersed in the region where the elastic the elements 24 are not present, as in the case of two sheet elements of an elastic stretch element described in Japanese patent application No. JP 2005-80859A.

In the front sheet element 2A and the rear sheet element 2B of the diaper 1, the outer sheet 22 is turned back to the side of the inner sheet 23 on the end portion of the waist 51, which forms a flange having a hole end for the waist 5. The turned part covers the surface facing the skin of the longitudinal end part of the absorbent node 3, and the part overlapping the absorbent node 3, is attached to the skin-facing surface of the top sheet 31 and forming the first leakproof cuff sheet material 35.

[0018]

As illustrated in FIG. 3, the absorbent assembly 3 of the diaper 1 includes a liquid-permeable top sheet 31, which forms a liquid-absorbent surface 30, a liquid-impervious bottom sheet 32, and a liquid-retaining absorbent member 33, which is located between the sheets 31 and 32. As illustrated in FIG. 2, the absorbent assembly 3 has a shape elongated in the longitudinal direction X of the article. The absorbent element 33 includes an absorbent core 330 made of fiber aggregates, such as cellulosic fibers (or it may be a nonwoven fabric) present individually or mixed with particles of an absorbent polymer, and a core wrapping sheet 331, which covers the absorbent core 330. The absorbent element 33 includes fiber-free side portions 33c located on both sides of the absorbent core 330 across its longitudinal center line, fiber-free side portions 33c, to torye constitute a part not containing the material for forming the absorbent core or containing material for forming the absorbent core with a smaller basis weight than the other part. The absorbent element 33 also includes, in the transverse central portion of the absorbent core 330, a fiber-free central portion 33d not containing material for forming an absorbent core or containing material for forming an absorbent core having a lower base weight than other parts. The absorbent element 33 also has a shape elongated in the longitudinal direction X of the product.

[0019]

The absorbent assembly 3 includes, in each of the two side parts along its longitudinal direction, a first leakproof cuff 34 having a free end 34a located inside relative to the lateral edge 33s of the absorbent member 33, and a second leakproof cuff 37 that extends from the outside, in the transverse direction of the absorbent assembly 3, relative to the lateral edge 33s of the absorbent element 33. The longitudinal direction of the absorbent assembly 3 is the same as the longitudinal direction of the product, and the transverse direction phenomenon absorbent assembly 3 is the same as the transverse direction of the product. Accordingly, hereinafter, the longitudinal direction of the absorbent assembly 3 will also be called the term “longitudinal direction X” and the transverse direction of the absorbent assembly 3 will also be called the term “transverse direction Y”. The free end 34a of the first leakproof cuff 34 should only at least be located inside of the lateral edge 33s of the absorbent element 33 in the unfolded and uncompressed state illustrated in FIG. 2. Similarly, the second leakproof cuff 37 should also only extend outside the side edge 33s of the absorbent member 33 in the unfolded and uncompressed state illustrated in FIG. 2.

[0020]

Each first leakproof cuff 34 includes a liquid resistant or water-repellent sheet material 35 and forming the first leakproof cuff elastic elements 36 attached to the sheet material 35. In the diaper 1 according to the present embodiment, the sheet material 35 that forms the first leakproof sheet the cuff 34, is a multilayer sheet having a two-layer structural part formed by folding one sheet in half at the free end 34a of the first the leakproof cuff 34, and the elastic elements 36 forming the first leakproof cuff, are fixed, by means of a binder, between the layers of the two-layer structural part of the first leakproof cuff 34 in the vicinity of the free end 34a. The layers of the two-layer structural part can be completely joined by a binder or in a similar way, or they can be partially joined in such a way as applying a binder according to the figure.

[0021]

As illustrated in FIG. 3, the top sheet 31 of the diaper 1 includes backwardly turned parts 31c outside of two side edges 33s of the absorbent member 33, each backwardly turned part 31c being turned back from the skin side of the surface to the non-skin surface of the absorbent element 33. More specifically, the upper the sheet 31 is a rectangular sheet elongated in the same direction as the longitudinal direction of the absorbent assembly 3, in which the central region in the center in the transverse direction Y of the absorbent assembly 3 is arranged is applied to the skin side of the surface of the absorbent element 33, and two lateral end regions located on both sides of the central region are bent downward towards the non-skin side of the surface of the absorbent element 33.

In addition, as illustrated in FIG. 3, each first leakproof cuff 34 includes a backwardly turned portion 34c outside of the corresponding one of the two side edges 33s of the absorbent member 33, the backwardly turned portion 34c being turned back from the skin side of the surface to the non-skin side of the surface of the absorbent element 33 More specifically, the first leakproof cuff 34 is turned back to further cover the top sheet 31, which has been turned back to cover the lateral parts of the absorbent total element 33.

The back-turned portions 31c of the top sheet 31 and back-turned parts 34c of the first leakproof cuffs 34 can be formed by folding to form an arcuate cross-sectional shape, as illustrated in FIG. 3.

[0022]

Each of the sheet materials 35 forming the first leakproof cuffs 34 includes an upper fixing portion 35u in a position separated by a gap in the transverse direction inside from the corresponding one of the two side edges 33s of the absorbent element 33 on the non-skin side of the surface of the absorbent element 33, moreover, the upper fixing portion 35u is attached to the upper sheet 31, turned down towards the non-skin side of the surface of the absorbent element 33. In addition, each of the sheets materials 35, forming the first leakproof cuffs 34, includes a lower fixing portion 35d in a position separated by a gap in the transverse direction inside from the corresponding one of the two side edges 33s of the absorbent element 33 on the non-skin side of the surface of the absorbent element 33, the lower the fixing portion 35d is attached to the bottom sheet 32. The outer transverse end portion of the lower fixing portion 35d serves as the main end portion 34b of the first leakproof cuff 34 In the diaper 1, the bottom sheet 32 is a “bottom sheet” according to the present invention. The bottom sheet is a sheet located on the outer side of the surface (on the lower side of FIG. 3) of the stretch absorbent article below the portion of the sheet material 35 forming the first leakproof cuff 34 in the thickness direction of the stretch absorbent article, such as a diaper 1, the part is located on the non-skin side of the surface of the absorbent element 33.

[0023]

In the diaper 1 according to the present embodiment, the bottom sheet 32 has a rectangular shape with long sides extending in the longitudinal direction of the absorbent assembly 3 as seen from above, and as illustrated in FIG. 3, the two side portions of the bottom sheet 32 extend externally in the transverse direction Y from the positions of the backward-turned portions 34c of the first leakproof cuffs 34 described above. In addition, the bottom sheet 32 extends from the two ends 33a and 33b of the absorbent element 33 in the longitudinal direction X of the absorbent assembly 3.

[0024]

In the absorbent assembly 3, as illustrated in FIG. 3, a part that overlaps the front sheet element 2A is attached to the front sheet element 2A by connecting means such as a binder, and the end parts of the second leakproof cuffs 37 are also attached to the front sheet element 2A. Similarly, the portion that overlaps the rear sheet element 2B is attached to the rear sheet element 2B by connecting means such as a binder, and the end parts of the second leakproof cuffs 37 are also attached to the rear sheet element 2B. Furthermore, at the end parts in the longitudinal direction of the absorbent assembly 3, the first leakproof cuffs 34 are attached to the top sheet 31 on the skin side of the surface of the absorbent element 33, the first leakproof cuffs 34 being folded inward in the transverse direction of the absorbent assembly in such a way that they are flat on the top sheet 31. As a method of attaching the absorbent assembly 3, a binder, such as a hot-melt binder, but in As an alternative or as a complement to a binder, it is also possible to use any other bonding method, such as thermal welding or ultrasonic welding.

[0025]

In the diaper 1 illustrated in FIG. 3, each sheet material 35 forming the first leakproof cuff 34 is attached to the upper sheet 31 and the lower sheet 32 by a binder 9, and as a result, the upper fixing part 35u and the lower fixing part 35d are formed. As an attachment method of the sheet material 35, it is also possible to use, as an alternative or as a complement to the binder, any other bonding method, such as thermal welding or ultrasonic welding.

[0026]

Each second leakproof cuff 37 includes a fluid resistant or water repellent sheet material 38 and a second leakproof cuff forming elastic elements 39 attached to the sheet material 38. In the diaper 1 according to the present embodiment, the sheet material 38, which forms the second leakproof sheet cuff 37, is a multilayer sheet having a two-layer structural part formed by folding one sheet in half at the free end 37a of the second the leak-proof cuff 37, and the elastic elements forming the second leak-proof cuff 37 are fixed, by means of a binder, between the layers of the two-layer structural part in the vicinity of the free end 37a of the second leak-proof cuff 37. The layers of the two-layer structural part can be completely connected by means of a binder or in a similar way, or they can partially be combined in a way, such as applying a binder according to the drawing.

[0027]

As illustrated in FIG. 3, the second leakproof cuff 37 of the diaper 1 is formed of a single continuous sheet consisting of sheet material 38, which forms one of the second leakproof cuffs 37, and the sheet material 38, which forms another second leakproof cuff 37. More specifically , the two lateral parts of the rectangular sheet are folded towards the side of the surface facing the skin, so that two-layer structural parts are formed that make up a pair of right and left second protecting from leaking cuffs 37.

As illustrated in FIG. 2 and 3, the sheet materials 38 and 38, which form the second leakproof cuff 37, are sheet materials that are different from the first leakproof cuff of the sheet materials, and are attached to the non-skin surface of the bottom sheet 32 in the crotch portion C of the diaper 1 by means of a binder 9. Each sheet material 38, which forms a second leakproof cuff 37, and the bottom sheet 32, which is the bottom sheet, can be fully connected, or may be partially coupled manner such as by applying a binder as illustrated. As a method of attaching the sheet material 38, which forms the second leakproof cuffs 37, to the bottom sheet 32, it is also possible to use, as an alternative or as a complement to the binder, any other bonding method, such as thermal welding or ultrasonic welding. As the sheet materials 38 that form the second leakproof cuffs 37, the sheet material that forms one of the second leakage cuffs 37 and the sheet material that forms the other second leakage cuff 37 can be separate sheet materials, and individual sheet materials may be spaced apart from each other or they may partially overlap.

[0028]

As illustrated in FIG. 3, the diaper 1 according to the present embodiment satisfies all of the following relationship expressions (1) to (4):

(1) L1 L L2;

(2) L2 L L1 + L3;

(3) L3≤L4; and

(4) L4≤L1 + L3,

where L1 is the length from the backwardly turned portion 34c to the free end 34a of each first leakproof cuff 34, L2 is the length of the second leakproof cuff 37 that extends from the backwardly turned away portion 34c of the first leakage cuff 34 to the free end of the second the cuff 37 against leakage, L3 is the distance between the backwardly turned portion 34c and the lower fixing portion 35d of the first cuff 34, and L4 is the distance between the bent Azad part 31c of the topsheet 31 and the upper fixing part 35u.

It is determined that said relationship expressions are satisfied or not in the expanded and uncompressed state illustrated in FIG. 2. For example, the position of the backwardly turned portion 34c of each first leakproof cuff 34 is determined in a state in which a portion of the first leakproof cuff 34, which should be located on the skin side of the surface of the absorbent element, is bent to lie flat on the top sheet 31, as indicated by reference number 34ʹ in FIG. 3. In addition, the lengths L1-L4, as well as the distance L5 and the total length L, which will be described later, are the lengths or distances measured in the transverse direction Y of the product, and the length or distance between two points is measured in the diaper in its deployed and uncompressed state when observed in a plan view. In addition, these relationship expressions should be satisfied only at least in the region where the distance L (see FIG. 3) between the free ends 37a of the second leak-proof cuffs is the shortest in the unfolded and uncompressed state. In addition, the diaper 1 according to the present embodiment is bilaterally symmetrical with respect to the center line CL in the longitudinal direction of the absorbent assembly 3, and for this reason, the following description will be presented using conditional numbers such as L1-L4 shown on the left side of the diagrams, but the configuration on the right side is the same.

[0029]

As a result of the expression of relation (1) being satisfied, the first leakproof cuff 34 can be reliably covered by the second leakproof cuff, and leakage from the perineal region can be prevented. In addition, it is possible to prevent anxiety arising with respect to marked leakage due to the fact that the first leakproof cuff 34 is visible from the perineal region. In addition, as a result of satisfying the ratio L1 L L2, it becomes possible to overcome the problem of engaging the legs on the first leakproof cuff 34 when introducing the leg through the leg opening.

[0030]

In addition, the top sheet 31 is folded down towards the non-skin side of the surface of the absorbent element 33, and the upper fixing portion 35u formed by the sheet material 35 forming the first leakproof cuff 34 and the top sheet 31, which is fixed, is present in a position separated from the lateral edge of the absorbent element 33 by a non-skin side of the surface of the absorbent element 33. Accordingly, the lateral part S of the absorbent element 33 is bent around STI upper fixing portion 35u, which allows the first protecting from percolation cuff 34 to rise easily toward the user's skin. In addition, as a result of satisfying the expression of relation (2), in the case where the crotch portion C sags during the wearing of the diaper, in particular due to absorption of the liquid, the first leakproof cuff 34 including the main end portion 34b and the turned back part 34c, rises to a large extent. As a result of the fact that the expression of the relation (1) and the expression of the relation (2) are satisfied, it is possible to ensure that the first leakproof cuff itself is of sufficient height, while the width of the liquid-absorbing surface 30 is prevented from decreasing due to the reduction of the width between the first leakproof cuffs 34, as in a configuration in which the length L1 of the first leakproof cuff 34 is a large length. Accordingly, even in the case where the crotch part l C sags due to absorption of fluid during the wearing of the diaper, the state in which the first leakproof cuff 34 is in contact with the skin of the user is maintained in a stable manner and leakage from the gap formed around the leg is prevented. It also turns out to be possible to prevent a sense of anxiety of parents, guardians and the user himself regarding leakage from the resulting gap.

[0031]

In addition, as a result of satisfying the expression of relation (3), the fit of the first leakproof cuff 34 is improved. Thus, as a result of the end portion of the absorbent element being raised upward, it is possible to increase the standing ability of the first leakproof cuff 34 when the first leakproof cuff 34 including the main end portion 34b and the backwardly turned portion 34c rises substantially. Accordingly, the effect of maintaining in a stable manner the state in which the first leakproof cuff 34 is in contact with the skin of the user can be further improved. In addition, as a result of satisfying the expression of relation (4), the absorbent element may be coated with the first leakproof cuff 34. Accordingly, it is possible to prevent contamination of the legs and outer clothing of the user due to contamination of the end of the absorbent element with excrement that adheres to the end of the first protective against cuff leakage.

[0032]

In the diaper 1 of the present embodiment, the elastic member 33e for lifting the side portion is fixed between the side edge portion 33s of the absorbent member 33 and the top sheet 31 covering the side edge portion 33s, which allows the side portion S of the absorbent member 33 to be easily lifted. The elastic member 33e may attach to the core wrapping sheet 331, may join the top sheet 31, or may simultaneously join the core wrapping sheet 331 and the upper sheet 31. In addition, the intermediate elastic member 40 is located in the central part between the free end 34a and the main end part 34b of the first leakproof cuff 34. The presence of an intermediate elastic member 40 allows, when the first leakproof cuff 34 rises, to maintain a stable image at the same time, the raised state of its intermediate part, and it is possible to prevent leakage caused by bending the intermediate part in an unexpected direction, in particular by bending the intermediate part from the outside in the direction from the second leak-proof cuff 34, or by bending the intermediate part inside and knotting the urination organ user.

[0033]

In the diaper 1 according to the present embodiment, as illustrated in FIG. 2, in the unfolded and uncompressed state, the elastic elements 39c of one of the second leakproof cuffs 37 and the elastic elements 39d of the other second leakproof cuff 37 are parallel to each other and extend in the longitudinal direction of the absorbent assembly 3. In a traditional diaper, having such a configuration, sagging of the crotch portion C due to absorption of the liquid becomes relatively likely, but by using the configuration of the present invention as described in Hsi, it is possible to effectively prevent occurrence and elimination of concern about the leakage.

In the diaper 1 of the present embodiment, the pair of right and left second leakproof cuffs 37 and 37 are also parallel to each other and extend in the longitudinal direction X of the absorbent assembly. In addition, the pair of right and left first leakproof cuffs 37 and 37 are also parallel to one another and extend in the longitudinal direction X of the absorbent assembly.

[0034]

From the point of view of further ensuring that one or more of the effects described above is obtained, it is preferred that the following relationships are also satisfied.

Regarding the expression of relation (1), the ratio of the length L2 and the length L1 (the length L2 of the second leakproof cuff 37 extending from the back portion 34c of the first leakproof cuff 34 to the free end of the second leakproof cuff 37 / length L1 from the unscrewed the back portion 34c to the free end 34a of the first leakproof cuff 34) is preferably 1.0 to 6.0 and more preferably 1.2 to 4.0.

In addition, with regard to the expression of relation (2), the ratio of the total length L1 and L3 and the length L2 [(length L1 from the back-turned part 34c to the free end 34a of the first leak-proof sleeve 34 + the distance L3 between the back-turned part 34c of the first protection the cuff 34 and the lower fixing part 35d) / length L2 from the backwardly turned away part 34c of the first cuff 34 against the free end of the second cuff 37] is preferably from 1.0 to 7.0 and more preferably from 1.2 to 4.0.

In addition, with regard to the expression of the relation (3), the ratio of the length L4 and the length L3 (the distance L4 between the backward-turned portion 31c of the upper sheet 31 and the upper fixing part 35u / the distance L3 between the backward-turned part 34c of the first leakproof cuff 34 and the lower fixing part 35d) is preferably from 1.0 to 6.0, and more preferably from 1.2 to 4.0.

In addition, with regard to the expression of relation (4), the ratio of the total length L1 and L3 and the length L4 [(length L1 from the back-turned part 34c to the free end 34a of the first leak-proof sleeve 34 + the distance L3 between the back-turned part 34c of the first protection the cuff 34 and the lower fixing part 35d) / the distance L4 between the backwardly turned away part 31c of the upper sheet 31 and the upper fixing part 35u] is preferably from 1.0 to 7.0, and more preferably from 1.2 to 4.0.

[0035]

In addition, with regard to the length L1, which is the length from the back-turned part to the free end of the first leak-proof cuff, the length L2, which is the length of the second leak-proof cuff, extending from the back-turned part of the first leak-proof cuff to the free the end of the second leak-proof cuff, a distance L3, which is the distance between the backward-turned portion of the first leak-proof cuff and the lower fixing part, and the distance L4 , which is the distance between the backward-turned portion of the upper sheet and the upper fixing part, corresponding to the distance L between the free ends 37a of the second leak-proof cuffs (hereinafter also referred to as the term “total length L of the absorbent assembly 3”), from the same point of view, the following intervals are preferably satisfied.

The proportion of the length L1 with respect to the total length L is preferably 5% or more, and more preferably 8% or more, and is preferably 40% or less, and more preferably 35% or less, and is preferably 5 to 40%, and more preferably 8 to 35%. In addition, the length L1 is preferably 10 mm or more, more preferably 15 mm or more, and is preferably 100 mm or less, and more preferably 60 mm or less, and is preferably 10 to 100 mm, and more preferably 15 to 60 mm.

The proportion of the length L2 with respect to the total length L is preferably 5% or more, and more preferably 8% or more, and is preferably 40% or less, and more preferably 35% or less, and is preferably 5 to 40%, and more preferably 8 to 35%. In addition, the length L2 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 100 mm or less, and more preferably 70 mm or less, and is preferably 10 to 100 mm, and more preferably 15 to 70 mm .

[0036]

The proportion of the length L3 with respect to the total length L is preferably 3% or more, and more preferably 5% or more, and is preferably 40% or less, and more preferably 35% or less, and is preferably 3 to 40%, and more preferably 5 to 35%. In addition, the length L3 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 80 mm or less, and more preferably 60 mm or less, and is preferably 10 to 80 mm, and more preferably 15 to 60 mm . The proportion of the total length L1 and L3 (L1 + L3) with respect to the full length L is preferably 10% or more, and more preferably 20% or more, and is preferably 80% or less, and more preferably 60% or less, and is preferably from 3 to 80%, and more preferably 5 to 60%.

[0037]

The proportion of the length L4 with respect to the full length L is preferably 3% or more, and more preferably 5% or more, and is preferably 40% or less, and more preferably 35% or less, and is preferably 3 to 40%, and more preferably 5 to 35%. In addition, the length L4 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 80 mm or less, and more preferably 60 mm or less, and is preferably 10 to 80 mm, and more preferably 15 to 60 mm .

[0038]

In addition, in the diaper 1, as illustrated in FIG. 2, the sheet material 38, which forms the second leakproof cuff 37, has a length L7 that is less than the length L6, the length L7 being the length of the sheet material 38 in the longitudinal direction X of the absorbent assembly 3, and the length L6 representing the length of the absorbent element 33 in the same direction. More specifically, in the sheet material 38, which constitutes the second leakproof cuff 37 and the absorbent element 33, it is preferable that their end portions 38a and 33a on the side of the front sheet element 2A are located on the front sheet element 2A or, more specifically, on the main part 20a of the front sheet element 2A, and the end part 38a of the sheet material 38 ends in a position that is closer to the crotch part C than the end part 33a of the absorbent element 33.

In addition, in the sheet material 38, which constitutes the second leakproof cuff 37 and the absorbent element 33, it is preferable that their end parts 38b and 33b on the side of the rear sheet element 2B are located on the rear sheet element 2B or, more specifically, on the main part 20b of the rear sheet element 2B, and the end part 38b of the sheet material 38 ends in a position that is closer to the crotch part C than the end part 33b of the absorbent element 33.

[0039]

In the case of a configuration in which the length L7 of the sheet material 38 is less than the length L6 of the absorbent member 33, the air permeability of the lower tubular portion D of the diaper 1 can improve. The lower tubular portion D is the tubular portion that forms the front sheet element 2A and the rear sheet element 2B, which are connected by a pair of side sealing parts 4 with the formation of an annular shape.

[0040]

In the diaper 1 according to the present embodiment, as illustrated in FIG. 2, the elastic elements 36 of the first leakproof cuff 34 have a longer length X in the longitudinal direction X of the absorbent assembly 3 than the elastic elements 39 of the second leakproof cuff 37. In this configuration, the fit of the first leakproof cuff 34 to the skin of the user is improved.

As referred to herein, the length of the elastic elements means the length of the portion of the elastic elements, which contributes to impart tensile properties to the first leakproof cuff 34 or the second leakproof cuff 37. For example, if the end portion of the first leakproof cuff 34 or the second leakproof cuff 37 in the longitudinal direction X includes an unstretched part, the length of the specified part is not included in the length of the elastic elements.

[0041]

In the diaper 1 according to the present embodiment, one end portion of the elastic elements 39 for forming the second leakproof cuffs 37 overlaps the main part 20a of the front sheet 2A, and the other end part overlaps with the main part 20b of the back sheet 2B. In other words, in the elastic elements 39 of the second leakproof cuff 37, the end part on the side of the front sheet element 2A and the end part on the back sheet 2B occupy positions that are closer to the end parts on the waist 51 from the lower ends of the side sealing parts 4. In the case of This configuration improves the fit of the second leakproof cuffs 37 to the skin of the user.

It is preferable that the free end 34a of the first leakproof cuff 34 comes into contact with the vicinity of the user's hip, and the free end 37a of the second leakproof cuff 37 makes contact with the area surrounding the hip, that is, located at a distance from the hip joint.

[0042]

In addition, as illustrated in FIG. 3, in the first leakproof cuff 34, the upper fixing portion 35u attached to the upper sheet 31 occupies an internal position in the transverse direction Y of the absorbent assembly 3, or, in other words, a position that is closer to the center line CL in the longitudinal direction of the absorbent assembly 3 than the lower fixing portion 35d to which the bottom sheet 32 (bottom sheet) is attached. With this configuration, the desired standing ability of the first cuff protects against leakage can be maximized without being limited by the standing state of the absorbent element.

It turns out that the distance L5 between the upper fixing part 35u and the lower fixing part 35d does not exceed the length L4, which is the distance between the backward-turned part 31c of the upper sheet 31 and the upper fixing parts 35u.

The proportion of the distance L5 between the upper fixing part 35u and the lower fixing parts 35d with respect to the length L4, which is the distance between the backwardly turned part 31c of the top sheet 31 and the upper fixing part 35u (L5 / L4) is preferably 3% or more, and more preferably 5% or more, and is preferably 97% or less, and more preferably 95% or less, and is preferably from 3 to 97%, and more preferably from 5 to 95%. In addition, the distance L5 is preferably 5 mm or more, more preferably 8 mm or more, and is preferably 80 mm or less, more preferably 60 mm or less, and is preferably 10 to 80 mm, and more preferably 15 to 60 mm.

[0043]

In the diaper 1 according to the present embodiment, as illustrated in FIG. 3, the pairing of the right and left second leakproof cuffs 37 and 37 in each case include a plurality of elastic elements 39a and 39b, and the end portion 32c of the lower sheet 32 in the transverse direction located on the non-skin side of the surface of the absorbent element 33 is located in the space 39e between the outermost elastic element 39a and the innermost elastic element 39b of the second leakproof cuff 37. As a result of the presence of this configuration, the diaper 1 further exhibits shennuyu ability to prevent leakage of fecal matter from diaper. Thus, since the innermost elastic element 39b is adjacent to the wearer's thigh, a portion of the second leakproof cuff that covers the absorbent element is completely covered by the bottom sheet. Accordingly, it is possible to reliably prevent leakage of fecal matter from the sheet of the second cuff protecting against leakage. In addition, since the innermost elastic element 39b is inward position with respect to the outermost elastic element 39a, the stiffness and fit of the elastic element around the leg is further improved, and leakage can be prevented while reducing inconvenience.

A configuration in which the end portion 32c is located in a space 39e between the elastic member 39a and the elastic member 39b also includes a configuration in which the end portion 32c of the bottom sheet 32 is located above the elastic member 39a or the elastic member 39b.

[0044]

In addition, as described above, in the diaper 1 according to the present embodiment, the absorbent core 330 of the absorbent member 33 includes fiber-free side portions 33c and 33c on both sides of the longitudinal center line CL of the absorbent assembly, and the position of the outer end portion of the upper fixing portion 35u of the sheet material 35 forming the first leakproof cuff 34, or in other words, the position of the main end portion 34b of the first leakproof cuff 34 overlaps the fiber-free side portion 33c, and and is located inside the lateral portion 33c in the transverse direction without the fibers, or in other words, is in a position that is closer to the center line CL in the longitudinal direction of the absorbent assembly 3.

This configuration allows the side portion S of the absorbent member 33 to be lifted more easily, and the effect of the present invention is further improved.

[0045]

Next, materials that are used to make the diaper 1 will be described.

As the top sheet 31, the bottom sheet 32, and the absorbent element 33 that make up the absorbent assembly 3, it is possible to use materials that are traditionally used in absorbent products, such as disposable diapers and sanitary napkins, without any limitation. For example, a hydrophilic and liquid-permeable non-woven fabric or the like may be used as the top sheet 31. As the bottom sheet 32, a liquid-impervious or water-repellent polymer film, a multilayer material consisting of a polymer film, and a non-woven fabric, or the like, can be used. The bottom sheet 32 may be vapor permeable.

As the absorbent element 33, it is possible to use, for example, an element obtained by coating the absorbent core with a core wrapping sheet, the absorbent core being made from aggregates of fibers, such as cellulose fibers (or nonwoven fabric may be present) that are individually present or mixed with absorbent particles polymer, and the core wrapping sheet is made of a permeable thin paper sheet, non-woven fabric or similar material.

[0046]

As the sheet materials 35 and 38, which form the first leakproof cuffs and the second leakproof cuffs, it is possible to use sheet materials of various types that are traditionally used for products of this type, without any limitation. The sheet materials 35 and 38 are preferably nonwoven webs. It also turns out to be possible to use a multilayer material consisting of a polymer film and a non-woven fabric, a multilayer non-woven fabric (SM, SMS, SMMS or the like) including a layer (S) obtained by spinning from a die and melt blown layer (M), or a similar material .

[0047]

As the outer sheet 22 and the inner sheet 23, it is possible to use sheet materials of various types that are traditionally used for products of this type, without any limitation. The outer sheet 22 and the inner sheet 23 are preferably made of a non-woven fabric, and, from the point of view of flexibility and other properties, it is preferable to use a single-layer non-woven fabric or a multilayer non-woven fabric having two or more layers made of an air-woven non-woven fabric, a hot-rolled non-woven fabric, hydro-woven non-woven fabric, spunbond non-woven fabric obtained by meltblown non-woven fabric, etc. It is also possible to use a sheet, obtained by integrating with the film any of the nonwoven webs mentioned above.

As the elastic elements 24, 36, 33e, 39 and 40, it is possible to use the known elastic elements of various types, which are used in absorbent products, such as disposable diapers and sanitary napkins. Examples of elastic materials for elastic elements include synthetic rubbers such as styrene butadiene copolymer, butadiene, isoprene and neoprene, natural rubbers, ethylene vinyl acetate copolymer (EVA), stretchable polyolefin and polyurethane. The elastic elements are preferably present in the form of a thread (flat rubber, etc.) or strips (flat rubber, etc.) having a rectangular, square, round or polygonal cross section, or in the form of a multi-fiber type.

[0048]

In the bottom sheet 32 of the diaper 1, which is described above, as illustrated in FIG. 2 and 3, each side part along the longitudinal direction contains on the surface of the skin contacting side a two-layer structural part of sheet material 38, which forms a second leakproof cuff 37, but in the diaper (not illustrated in the drawing) according to the second embodiment of the present of the invention, each of the two lateral parts of the bottom sheet 32 in the longitudinal direction X of the product is located between the layers of the two-layer structural part of the sheet material, which forms a second protective w leak cuff 37, and the second protects against leakage from the cuff 37 comprises a side portion of the backsheet 32 and the sheet material 38, reverse folded to cover the lateral portion. According to a second embodiment, the side portion of the bottom sheet 32 does not necessarily extend to the position of the second cuff forming the elastic element 39 against leakage (see FIG. 3). The lateral part of the bottom sheet 32 can extend to the position of the second leak-proof cuff of the elastic element 39 so that all or some of the elastic elements 39 are present on the side not in contact with the skin or on the part not in contact with the skin of the side parts of the bottom sheet 32. However, it is preferable that the side part of the bottom sheet 32 is located in the space 37a between the elastic element 39a and the elastic element 39b. As a result of the presence of this configuration, the diaper 1 exhibits an additionally improved ability to prevent fecal matter from flowing out of the diaper. Furthermore, in the sheet material 38 covering the side in contact with the skin of the surface of the side portion of the bottom sheet 32, its end portion located away from the center in the transverse direction Y of the article does not necessarily extend to the position of the lower fixing portion 35d of the first leakproof cuff 34, but can extend to the position of the lower locking portion 35d of the first leakproof cuff 34. In the case of a configuration in which the end portion away from the center does not extend to the lower fix position iruyuschey portion 35d of the first protecting against leakage cuffs 34, it is preferable that the forming a first protecting against leakage cuff sheet material 35 is attached to a portion of the backsheet 32 which is not covered by the sheet material 38 and form the lower locking part 35d. In the case of a configuration in which the end portion away from the center extends to the position of the lower fixing portion 35d of the first leakproof cuff 34, it is preferable that the sheet material 35 forming the first leakproof cuff is attached to the sheet material 38 and formed lower fixing portion 35d.

[0049]

The diaper according to the second embodiment also provides the same beneficial effects as the effects of the diaper 1 described above by satisfying the above expressions of the relation (1) to (4).

In addition, in the case of the diaper according to the second embodiment, it is possible to prevent the lower sheet 32 from coming into direct contact with the skin when the second leakproof cuffs rest against the legs of the user, and thus, the tactile sensation around the legs is improved. In addition, since the bottom sheet 32 is open, it is possible to prevent damage to the bottom sheet 32 when the diaper is in use. From this point of view, it is preferable that the sheet material 38, turned back to cover the side of the lower sheet 32, is made of non-woven fabric. In addition, it is preferable that the sheet material 38 is attached to the sheet material 35, which forms the first leakproof cuff with the formation of the lower locking part 35d. The diaper according to the second embodiment is the same as the diaper 1 according to the embodiment described above, including preferred configurations, with the exception of the above differences.

[0050]

The present invention has been described above by means of preferred embodiments, but the present invention is not limited to the embodiments presented above and may be modified accordingly.

[0051]

For example, the front sheet element 2A may have a configuration such as a rear sheet element 2B, which includes an additional portion that extends from the lower end of the side sealing portion 4 toward the crotch portion C. In addition, the rear sheet element 2B may have such a configuration, which does not include an additional part, as in the front sheet element 2A.

[0052]

In addition, one or both of the elements representing the elastic element 33e for lifting the side part and the intermediate elastic element 40 may be absent.

In addition, FIG. 2 and 3 illustrate an absorbent core 330 including, in addition to fiber-free side portions 33c, a fiber-free center portion 33d, but the absorbent element 33 according to the present invention may include an absorbent core 330 that includes only fiber-free side portions 33c and does not include a central portion 33d without fibers. Furthermore, the side portions 33c without the fibers of the absorbent core 330 may have such configurations as illustrated in FIG. 5.

In addition, the core wrapping sheet that covers the absorbent core may consist of one sheet completely covering the absorbent core 330, or from a combination sheet consisting of two or more sheets and completely covering the absorbent core 330. For example, a sheet facing the skin facing the surface side of the absorbent core 330, and the sheet covering the non-skin side of the surface can be separate sheets.

[0053]

The lateral sealing parts 4 may in each case include an unconnected part from the outside with respect to the side sealing part, this unconnected part being a part that has a small width of, for example, from 0 to 20 mm, and is not connected to the front sheet element 2A, nor to the rear sheet element 2B.

In addition, the stretchable absorbent article can be used as a stretchable disposable diaper for children and a stretchable disposable diaper for adults, as well as a stretchable sanitary napkin, etc.

[0054]

With respect to the embodiments described above, the present invention further describes the following absorbent article.

<1>

A stretchable absorbent article comprising a front sheet element which is intended to be arranged on the front side of the user, a rear sheet element which is intended to be arranged on the rear side of the user, and an elongated absorbent assembly that is fixed to overlap the front sheet element and the rear sheet element, the front sheet element and the rear sheet element are connected to form a pair of side sealing portions, openings for the waist, and a pair of openings for the legs,

wherein the absorbent assembly includes a top sheet that forms a liquid absorbent surface and is capable of holding a liquid absorbent element, and also includes, in each of two side portions along a longitudinal direction of the absorbent assembly, a first leakproof cuff having a free end that is located inside from the side edge of the absorbent element, and a second cuff that protects against leakage, which extends outside the side edge of the absorbent element,

the top sheet and the first leakproof cuff in each case include backwardly turned parts outside from two side edges of the absorbent element, each backwardly turned part is folded back to the non-skin side of the surface from the skin surface of the absorbent element,

the sheet material that forms the first leakproof cuff includes: an upper fixing portion attached to the upper sheet; and a lower fixing part attached to the lower sheet, the upper fixing part and the lower fixing part being in positions separated by a gap in the transverse direction inside from each of the two side edges of the absorbent element on the non-skin side of the surface of the absorbent element, and

the stretchable absorbent article satisfies all of the following relationship expressions (1) to (4):

(1) L1 L L2;

(2) L2 L L1 + L3;

(3) L3≤L4; and

(4) L4≤L1 + L3,

where L1 is the length from the backward-turned portion of the first leak-proof cuff to the free end of the first leak-proof cuff, L2 is the length of the second leak-proof cuff that extends from the backward-turned portion of the first leak-proof cuff to the free end of the second anti-leakage cuff leakage, L3 represents the distance between the backwardly turned portion of the first cuff leakage protection and the lower fixing part, and L4 represents the distance between Do not turn back part of the top sheet and upper retaining part.

[0055]

<2>

The stretchable absorbent article according to the preceding claim <1>, in which the elastic element of one of the second leakage protection cuffs and the elastic element of the other of the second leakage protection cuffs are parallel to one another and extend in the longitudinal direction of the absorbent assembly.

<3>

A stretchable absorbent article according to the preceding claim <1> or <2>,

in which a liquid-impervious lower sheet is located on the non-skin side of the surface of the absorbent element, and

the sheet material that forms the second leakproof cuff is a sheet material that is different from the sheet material that makes up the first leakproof cuff and is located on the surface of the lower sheet not facing the skin in the crotch portion of the stretch absorbent article.

<4>

A stretchable absorbent article according to the preceding claim <1> or <2>,

in which a liquid-impervious lower sheet is located on the non-skin side of the surface of the absorbent element, and

the second leakproof cuff includes a side portion of the bottom sheet and a sheet material folded back to cover the side portion, the sheet material being made of a nonwoven fabric.

<5>

A stretchable absorbent article according to any one of the preceding claims. <1> - <4>, in which the sheet material that forms the second leakproof cuff has a length in the longitudinal direction of the absorbent assembly, which is less than the length of the absorbent element in the longitudinal direction of the absorbent assembly.

[0056]

<6>

A stretchable absorbent article according to any one of the preceding claims. <1> - <4>, in which the elastic elements of the first leakproof cuffs have a length in the longitudinal direction of the absorbent assembly, which is more than the length of the elastic elements of the second leakproof cuffs.

<7>

A stretchable absorbent article according to any one of the preceding claims. <1> - <6>, in which, in the elastic elements of the second cuffs, the end part on the side of the front sheet element and the end part on the side of the back sheet element occupy positions closer to the end parts at the waist than the lower ends of the side seals parts.

<8>

A stretchable absorbent article according to any one of the preceding claims. <1> - <7>, in which, in the first cuff that protects against leakage, the upper fixing part is located inside, in the transverse direction of the absorbent assembly, from the lower fixing part.

<9>

A stretchable absorbent article according to any one of the preceding claims. <1> - <8>,

in which each of the second cushioning protection includes a plurality of elastic elements,

a liquid impervious bottom sheet is disposed on a non-skin side of the surface of the absorbent element, and

the transverse end portion of the bottom sheet is located between the outermost elastic element and the innermost elastic element of the second cuff protecting against leakage.

<10>

A stretchable absorbent article according to any one of the preceding claims. <1> - <9>,

in which the absorbent element includes an absorbent core and a core wrapping sheet that covers the absorbent core,

the absorbent core includes a fiber-free side on each side of a longitudinal center line of the absorbent assembly, and

the position of the outer end part of the upper fixing part overlaps the side part without fibers or is located inside from the side part without fibers in the transverse direction.

[0057]

<11>

A stretchable absorbent article according to any one of the preceding claims. <1> - <9>, in which the ratio of the length L2 and the length L1 (the length L2 of the second leakproof cuff 37 extending from the back portion 34c of the first leakproof cuff 34 to the free end of the second leakproof cuff 37 / length L1 from the backwardly turned portion 34c to the free end 34a of the first leakproof cuff 34) is from 1.0 to 6.0 and preferably from 1.2 to 4.0.

<12>

A stretchable absorbent article according to any one of the preceding claims. <1> - <11>, in which the ratio of the total length L1 and L3 and length L2 [(length L1 from the back-turned part 34c to the free end 34a of the first leak-proof cuff 34 + the distance L3 between the back-turned part 34c of the first leak-proof the cuff 34 and the lower fixing part 35d) / length L2 from the backwardly turned away portion 34c of the first leakproof cuff 34 to the free end of the second leakproof cuff 37] is from 1.0 to 7.0 and preferably from 1.2 to 4, 0.

<13>

A stretchable absorbent article according to any one of the preceding claims. <1> - <12>, in which the ratio of the length L4 and the length L3 (the distance L4 between the backward-turned portion 31c of the upper sheet 31 and the upper fixing part 35u / the distance L3 between the backward-turned part 34c of the first leakproof cuff 34 and the lower fixing part 35d) is from 1.0 to 6.0, and preferably from 1.2 to 4.0.

<14>

A stretchable absorbent article according to any one of the preceding claims. <1> - <13>, in which the ratio of the total length L1 and L3 and length L4 [(length L1 from the backward-turned portion 34c to the free end 34a of the first leakproof cuff 34 + the distance L3 between the backwardly turned away portion 34c of the first leakproof the cuff 34 and the lower fixing part 35d) / the distance L4 between the backwardly turned away part 31c of the upper sheet 31 and the upper fixing part 35u] is from 1.0 to 7.0 and preferably from 1.2 to 4.0.

<15>

A stretchable absorbent article according to any one of the preceding claims. <1> - <14>, in which the proportion of the length L1 with respect to the total length L of the absorbent assembly is preferably 5% or more, and more preferably 8% or more, and is preferably 40% or less, and more preferably 35% or less.

[0058]

<16>

A stretchable absorbent article according to any one of the preceding claims. <1> - <15>, in which the length L1 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 100 mm or less, and more preferably 60 mm or less.

<17>

A stretchable absorbent article according to any one of the preceding claims. <1> - <16>, in which the proportion of the length L2 with respect to the total length L of the absorbent assembly is preferably 5% or more, and more preferably 8% or more, and is preferably 40% or less, and more preferably 35% or less.

<18>

A stretchable absorbent article according to any one of the preceding claims. <1> - <17>, in which the length L2 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 100 mm or less, and more preferably 70 mm or less.

<19>

A stretchable absorbent article according to any one of the preceding claims. <1> - <18> in which the proportion of the length L3 with respect to the total length L of the absorbent assembly is preferably 3% or more, and more preferably 5% or more, and is preferably 40% or less, and more preferably 35% or less.

<20>

A stretchable absorbent article according to any one of the preceding claims. <1> - <19>, in which the length L3 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 80 mm or less, and more preferably 60 mm or less, and is preferably 10 to 80 mm, and more preferably 15 to 60 mm.

[0059]

<21>

A stretchable absorbent article according to any one of the preceding claims. <1> - <20>, in which the proportion of the total length L1 and L3 (L1 + L3) with respect to the total length L of the absorbent assembly is preferably 10% or more, and more preferably 20% or more, and is preferably 80% or less and more preferably 60% or less.

<22>

A stretchable absorbent article according to any one of the preceding claims. <1> - <21>,

in which the proportion of the length L4 with respect to the total length L of the absorbent assembly is preferably 3% or more, and more preferably 5% or more, and is preferably 40% or less, and more preferably 35% or less.

<23>

A stretchable absorbent article according to any one of the preceding claims. <1> - <22>,

in which the length L3 is preferably 10 mm or more, and more preferably 15 mm or more, and is preferably 80 mm or less, and more preferably 60 mm or less.

<24>

A stretchable absorbent article according to any one of the preceding claims. <1> - <23>,

in which in the sheet material, which constitutes the second leakproof cuff, the end portion on the side of the front sheet element is located on the main part of the front sheet element, and

the end part of the sheet material ends in a position closer to the crotch part than the end part, the end part of the absorbent element.

<25>

A stretchable absorbent article according to any one of the preceding claims. <1> - <24>,

wherein in a sheet material that forms a second leakproof cuff, an end portion on the side of the rear sheet element is located on a main part of the rear sheet element, and

the end portion of the sheet material ends in a position closer to the crotch portion than the end portion of the absorbent element.

[0060]

<26>

A stretchable absorbent article according to any one of the preceding claims. <1> - <13>, in which the free end 34a of the first leakproof cuff 34 preferably comes into contact with the vicinity of the user's hip joint and the free end 37a of the second leakproof cuff 37 makes contact with the region surrounding the thigh, i.e., located at a distance from the hip joint.

<27>

A stretchable absorbent article according to any one of the preceding claims. <1> - <26>, in which the distance L5 between the upper fixing part and the lower fixing part does not exceed the distance L4 between the backward-turned part of the upper sheet and the upper fixing part.

<28>

A stretchable absorbent article according to any one of the preceding claims. <1> - <27>, in which the proportion of the distance L5 between the upper fixing part and the lower fixing part with respect to the length L4, which is the distance between the backwardly turned part of the upper sheet and the upper fixing part, is preferably 3% or more, and more preferably 5% or more, and is preferably 97% or less, and more preferably 95% or less.

<29>

A stretchable absorbent article according to any one of the preceding claims. <1> - <28>, in which the back sheet member has a length, in the longitudinal direction X of the product, which is more than the length of the side sealing parts in the longitudinal direction X of the product, and as a result, a main part is formed having side sealing parts on its two transverse sides, and an additional part that extends from the main part towards the crotch part C and does not include lateral sealing parts on its two transverse sides.

<30>

A stretchable absorbent article according to any one of the preceding claims. <1> - <13>, in which the front sheet element 2A includes a main body 20a having lateral sealing parts 4 and 4 on its two transverse sides, and does not include an additional part that extends from the main body 20a toward the crotch part C .

[0061]

<31>

A stretchable absorbent article according to any one of the preceding claims. <1> - <30>,

wherein the front sheet member includes a stretch portion at the waist and a stretch portion below the waist, and

the back sheet member includes a stretch portion at the waist, a stretch portion below the waist, and a stretch portion of the supplemental portion.

<32>

A stretchable absorbent article according to any one of the preceding claims. <1> - <31>, in which two sheets constituting the front sheet element and the rear sheet element are joined to each other in a plurality of connected parts formed in a diffuse manner in the region where the elastic elements are not located.

<33>

A stretchable absorbent article according to any one of the preceding claims. <1> - <32>, in which the absorbent core includes, in the transverse central portion of the absorbent core, a fiber-free central portion that does not contain material for forming an absorbent core or contains material for forming an absorbent core having a lower base weight than other parts .

<34>

A stretchable absorbent article according to any one of the preceding claims. <1> - <33>, in which the sheet material that forms one of the second leakproof cuffs and the sheet material that forms the other of the second leakproof cuffs are made from a single continuous sheet.

<35>

Stretchable absorbent product according to any one of paragraphs. <1>, <2> and <4> - <34>, in which the sheet material that forms the second leakproof cuff is a sheet material different from the sheet material that makes up the first leakproof cuff.

[0062]

<36>

A stretchable absorbent article according to any one of the preceding claims. <1> - <35>, in which the elastic element for lifting the side part is fixed between the side edge part of the absorbent element and the top sheet covering the side edge part.

<37>

A stretchable absorbent article according to any one of the preceding claims. <1> - <36>, in which the intermediate elastic element is located in the Central part between the free end and the main end part of the first cuff that protects against leakage.

<38>

A stretchable absorbent article according to any one of the preceding claims. <1> - <37>, in which the sheet material that forms the first leakproof cuff or the second leakproof cuff is a nonwoven fabric.

Industrial applicability

[0063]

By using the stretchable article according to the present embodiment, it is possible to prevent leakage from the gap created around the legs and problems arising from the noticeable leakage while maintaining ease of wearing and good fit.

Claims (63)

1. A stretchable absorbent article comprising a front sheet member that is designed to be located on the front side of the user, a rear sheet member that is designed to be located on the back side of the user, and an elongated absorbent assembly that is fixed to overlap the front sheet member and the back sheet member moreover, the front sheet element and the rear sheet element are connected to form a pair of lateral sealing parts, openings for the waist and a pair of openings for the legs, moreover, the absorbent assembly includes a top sheet that forms a liquid absorbent surface, and is capable of holding a liquid absorbent element, and also in each of the two side parts along the longitudinal direction of the absorbent assembly includes a first leakproof cuff having a free end that is located inside from the side edge of the absorbent element, and a second leak-proof cuff, which extends outside the side edge of the absorbent element, the top sheet and the first leakproof cuff in each case include backwardly turned parts outside from two side edges of the absorbent element, each backwardly turned part is folded back to the non-skin side of the surface from the skin surface of the absorbent element, the sheet material that forms the first leakproof cuff includes: an upper fixing part attached to the upper sheet and a lower fixing part attached to the lower sheet, the upper fixing part and the lower fixing part being in positions separated by a gap in the transverse the direction inside of each of the two side edges of the absorbent element on the non-skin side of the surface of the absorbent element, and the stretchable absorbent article satisfies all of the following relationship expressions (1) to (4): (1) L1 L L2; (2) L2 L L1 + L3; (3) L3≤L4; and (4) L4≤L1 + L3, where L1 is the length from the portion of the first cuff that protects against leakage to the free end of the first cuff that protects against leakage, L2 is the length of the second cuff that protects against leakage, which runs from the portion of the first protector that protects against cuff to the free end of the second cuff that protects against leakage , L3 is the distance between the backward-turned portion of the first cuff protector and the lower locking part, and L4 is the distance between the backward-turned portion of the upper sheet and the upper locking part. 2. The stretchable absorbent article according to claim 1, wherein the elastic element of one of the second leakage protection cuffs and the elastic element of the other of the second leakage protection cuffs are parallel to each other and extend in the longitudinal direction of the absorbent assembly. 3. The stretchable absorbent article of claim 1, wherein a liquid-impervious lower sheet is located on the non-skin side of the surface of the absorbent element, and the sheet material that forms the second leakproof cuff is a sheet material that is different from the sheet material which makes up the first leakproof cuff and is located on the surface of the lower sheet not facing the skin in the crotch portion of the stretch absorbent article. 4. The stretchable absorbent article of claim 1, wherein a liquid-impervious lower sheet is located on the non-skin side of the surface of the absorbent element, and the second leakproof cuff includes a side portion of the bottom sheet and a sheet material folded back to cover the side portion, the sheet material being made of a nonwoven fabric. 5. The stretchable absorbent article according to claim 1, wherein the length of the sheet material forming the second leakproof cuff in the longitudinal direction of the absorbent assembly is less than the length of the absorbent element in the longitudinal direction of the absorbent assembly. 6. The stretchable absorbent article according to claim 1, wherein the length of the elastic elements of the first cuffs protecting against leakage in the longitudinal direction of the absorbent assembly exceeds the length of the elastic elements of the second cuffs protecting from leakage. 7. The stretchable absorbent product according to claim 1, wherein in the elastic elements of the second cuff leakage protection, the end portion on the side of the front sheet element and the end portion on the side of the rear sheet element are located at locations closer to the end portions of the waist than the lower ends of the side seals parts. 8. The stretchable absorbent article according to claim 1, wherein in the first cuff that protects against leakage, the upper fixing part is located inside the lower fixing part in the transverse direction of the absorbent assembly. 9. A stretchable absorbent product according to claim 1, in which each of the second cuff protection against leakage includes many elastic elements, a liquid-impervious lower sheet is located on the non-skin side of the surface of the absorbent element, and the transverse end portion of the bottom sheet is located between the outermost elastic element and the innermost elastic element of the second cuff protecting against leakage. 10. A stretchable absorbent product according to claim 1, in which the absorbent element includes an absorbent core and a core wrapping sheet that covers the absorbent core, the absorbent core includes a fiber-free side portion on each side of a longitudinal center line of the absorbent assembly, and the position of the outer end part of the upper fixing part overlaps the side part without fibers or is located inside the side part without fibers in the transverse direction. 11. The stretchable absorbent product according to claim 1, in which the absorbent core, in its transverse central part, includes a fiber-free central part in which there is no material for forming an absorbent core or material for forming an absorbent core having a lower base weight, than other parts. 12. The stretchable absorbent article of claim 1, wherein the ratio of the length L2 to the length L1 is from 1.0 to 6.0. 13. The stretchable absorbent article of claim 1, wherein the ratio of the total length L1 and L3 to the length L2 is from 1.0 to 7.0. 14. The stretchable absorbent article of claim 1, wherein the ratio of the length L4 to the length L3 is from 1.0 to 6.0. 15. The stretchable absorbent article of claim 1, wherein the ratio of the total length L1 and L3 to the length L4 is from 1.0 to 7.0. 16. The stretchable absorbent article of claim 1, wherein the proportion of the length L1 with respect to the full width of the absorbent assembly is from 5 to 40%. 17. The stretchable absorbent article of claim 1, wherein the length L1 is from 10 to 100 mm. 18. The stretchable absorbent article of claim 1, wherein the proportion of the length L2 to the full width of the absorbent assembly is from 5 to 40%. 19. The stretchable absorbent article of claim 1, wherein the length L2 is from 10 to 100 mm. 20. The stretchable absorbent article of claim 1, wherein the proportion of the length L3 with respect to the full width of the absorbent assembly is from 3 to 40%. 21. The stretchable absorbent article of claim 1, wherein the length L3 is from 10 to 80 mm. 22. The stretchable absorbent article of claim 1, wherein the proportion of the total length L1 and L3 with respect to the total width of the absorbent assembly is from 10 to 80%. 23. The stretchable absorbent article of claim 1, wherein the proportion of the length L4 to the full width of the absorbent assembly is from 3 to 40%. 24. The stretchable absorbent article of claim 1, wherein the length L3 is from 10 to 80 mm. 25. The stretchable absorbent article according to claim 1, wherein the free end of the first cuff protects against leakage of the hip joint of the user, and the free end of the second cuff protects against contact with the region surrounding the thigh, that is, at a distance from the hip joint. 26. The stretchable absorbent article according to claim 1, wherein the distance between the upper fixing part and the lower fixing part does not exceed the distance between the backward-turned part of the upper sheet and the upper fixing part. 27. The stretchable absorbent article of claim 1, wherein the proportion of the distance between the upper fixing part and the lower fixing part with respect to the distance between the backwardly turned part of the upper sheet and the upper fixing part is from 3 to 97%. 28. The stretchable absorbent article according to claim 1, wherein the longitudinal sheet element has a back sheet member that is longer than the length in the longitudinal direction of the product of the side sealing parts, resulting in: a main part having side sealing parts on its two transverse sides; and an additional part that extends from the main part toward the crotch part and does not include side sealing parts on its two transverse sides. 29. A stretchable absorbent article according to claim 28, in which in a sheet material that forms a second leakproof cuff, an end portion on the side of the rear sheet element is located on a main part of the rear sheet element, and the end portion of the sheet material is finished in a position closer to the crotch portion than the position of the end portion of the absorbent element. 30. The stretchable absorbent article according to claim 1, wherein the front sheet element includes a main part having lateral sealing parts on its two transverse sides, and does not include an additional part that extends from the main part toward the crotch part. 31. A stretchable absorbent article according to claim 30, in which in the sheet material, which constitutes the second leakproof cuff, the end portion on the side of the front sheet element is located on the main part of the front sheet element, and the end portion of the sheet material is finished in a position closer to the crotch portion than the position of the end portion of the absorbent element. 32. A stretchable absorbent article according to claim 1, in which the front sheet member includes a stretch portion at the waist and a stretch portion below the waist, and the back sheet member includes a stretch portion at the waist, a stretch portion below the waist, and a stretch portion of the supplemental portion. 33. The stretch-absorbent article of claim 1, wherein the two sheets constituting the front sheet element and the rear sheet element are connected to each other in a plurality of connected parts distributed in an area where there are no elastic elements. 34. The stretchable absorbent article of claim 1, wherein the sheet material that forms one of the second leakage cuffs and the sheet material that forms the other of the second leakage cuffs are made from a single continuous sheet. 35. The stretchable absorbent article of claim 1, wherein the sheet material that forms the second leakproof cuff is a sheet material different from the sheet material that makes up the first leakproof cuff. 36. The stretchable absorbent article according to claim 1, wherein an elastic element is fixed between the lateral edge portion of the absorbent element and the top sheet covering the lateral edge portion to lift the lateral portion. 37. The stretchable absorbent article according to claim 1, wherein an intermediate elastic element is located in the central part between the free end and the main end part of the first leak-proof cuff. 38. The stretchable absorbent article of claim 1, wherein the sheet material that forms the first leakproof cuff or the second leakproof cuff is a nonwoven fabric.

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