RU2582955C2 - Disposable diaper - Google Patents

Abstract

FIELD: personal use items; hygiene.

SUBSTANCE: disposable diaper (1A), containing parts such as rear cover part, and so that user is closed and formed with sprawling torso portions (80) containing an elastic nonwoven fabric, wherein stretch in elastic material attached to nonwoven fabric sheet nonwoven, and nonwoven sheet material is stretchable and moved integrally, stretchable portion (80) is formed in such a way that it shrinks in direction of body and so sheet (82) forming a cell is located on a part of nonwoven surface contact with skin at site, which is formed by stretch portion (80) formed by compound (84) which provide discontinuous connection plate (82) forming cells and stretchable portion (80) in direction of tightening stretchable portion (80), and due to presence of compounds (84) of cell (86) are formed and are formed between layers formed by sheet (82) forming a cell, and stretchable portion (80), wherein cell data continue so that they intersect direction of tightening stretchable portion (80).

EFFECT: absorption.

13 cl, 66 dwg

Description

Technical field

The present invention relates to a disposable diaper.

State of the art

A disposable diaper is an absorbent article that is placed around the wearer to close the lower back zone and which is equipped with an absorbent element designed to absorb and retain body excretions.

Disposable diapers of the type described above are fixed along the waist edge of the part covering the lower back and / or along the edge of the part covering the inner sides of the legs (for example, along the circumference of the leg opening) by means of a stretchable material in its stretched state. This stretch material is attached in order to improve wear and fit, in addition to preventing leakage of body excretions from the waist and leg openings.

However, simply fixing the diaper by using the stretched material in the stretched state means that even if it is possible to give the fastened parts of the stretchable material elasticity, there will be cases in which its flexibility and shock absorbing properties, etc. will not be enough. The problems included 1) the fact that the stretchable material is too tight, which leads to traces of rubber material (traces of stretched material) on the user's skin; 2) the fact that the fastened part of the stretchable material can easily become hardened by applying adhesive or heat sealing of the stretchable material, which leads to a decrease in flexibility and a deterioration in the sensation of the diaper; or 3) in particular, the fact that if the circumferential periphery of the waist and leg openings becomes hardened, not only the skin of the user, but also the fingers of the person replacing the diaper, may be injured.

For these reasons, various proposals have been made to increase the elasticity of the fastened parts of the stretchable material of disposable diapers while increasing their flexibility and improving the cushioning properties. For example, a panty-shaped absorbent article is provided, comprising an absorbent outer covering material formed from a sheet representing the outer layer, a sheet representing the inner layer, and numerous pieces of elastic material, in which the sheet representing the outer layer and the sheet, which is an inner layer, placed respectively in the direction of the lower back and perpendicular to it and connected together by means of joints formed as discontinuous, and the skins of the elastic material are placed towards the lower back so that they do not pass through the joints (see Patent Documents 1-5).

With this panty-shaped absorbent article, the elastic material is configured so that it will not be attached either to the sheet representing the outer layer or to the sheet representing the inner layer. As a result, when the elastic material is pulled together, the sheet representing the outer layer and the sheet representing the inner layer are bent so that they separate from each other, forming numerous assemblies (bumps) and stretching from the outer edge to the inner edge around the circumferential periphery of the whole belt.

Background Documents

Patent documents

[Patent Document 1] JP-A 2008-136793

[Patent Document 2] JP-A 2008-136794

[Patent Document 3] JP-A 2008-142316

[Patent Document 4] JP-A 2008-142341

[Patent Document 5] JP-A 2008-142342

Summary of the invention

Absorbent cowl-shaped articles according to Patent Documents 1-5 form a volume in the direction of layer-by-layer overlay of a sheet representing the outer layer and a sheet representing the inner layer in the form of convex zones of assemblies, which are believed to be designed to increase flexibility and improving cushioning properties, etc. zone in which the stretch material is placed.

However, due to the fact that in the configuration according to patent documents 1-5, the sheet representing the outer layer and the sheet representing the inner layer are connected together in the direction of the lower back and perpendicular to it, the movement of the sheet representing the outer layer and the sheet representing the inner layer is limited, and even if the elastic material is contracted, there is a problem in that it is difficult to bend the sheet representing the outer layer and the sheet representing fight inner layer. As a result, it was difficult to form highly convex shapes, which means that the advantage of increasing flexibility and improving the cushioning properties was limited.

In addition, with this configuration, the air and moisture inside the diaper are released into the space external to the diaper through the concave parts of the assemblies, as a result of which increased air permeability and improved moisture removal can be expected. However, there is a problem associated with moisture condensation on the surface of the convex parts of the assemblies, which causes contact of water with the skin of the user. It is not advisable for the contracting part of the diaper to rub on the skin moistened with water, as this can lead to skin problems.

It is possible that some of the air and moisture in the diaper may not pass through the concave parts of the assemblies and may instead penetrate the sheet, which is the inner layer, entering the space formed between the convex part of the sheet, which is the outer layer, and the convex part of the sheet, which is the inner layer. However, since this space is a sealed space without holes, there is a tendency that air and moisture become trapped within the sealed space. It is believed that as a result, the passage of air and moisture further will be difficult.

In addition, the configuration is a special configuration in which the elastic material is placed so that it does not pass through intermittent connections between the sheet representing the outer layer and the sheet representing the inner layer. With this configuration, the elastic material is not limited to either a sheet representing the outer layer or a sheet representing the inner layer, and can stretch unhindered. If the elastic material used in the manufacture has a stretch ratio of, for example, 300%, there is a possibility that in some places the elastic material will stretch with a degree exceeding 300%. In other words, there are cases where the elastic material may be excessively stretched with a degree exceeding its ideal degree of stretching. As a result, an elastic material that has been stretched to a solid state will come into contact with the skin through a sheet representing the inner layer, which potentially causes pain or discomfort.

An additional problem is that during manufacturing, precise joint technology is required to create a special configuration, which makes the manufacture of these products more difficult.

The present invention has been made in view of the problems encountered when using products of the prior art of the type described above. In other words, in accordance with the present invention, a disposable diaper is developed with excellent flexibility, cushioning properties, breathability and moisture removal characteristic of stretch material placed on the edge of the waistband in the part that covers the lower back, and on the edges of the part that covers the inner side of the legs (for example, the circumferential periphery of the leg openings), which can be made simply and in which the stretchable material is effective in preventing leakage body spells.

The authors of the present invention seriously considered the problems associated with solving the problems of this type that are encountered when using products of the prior art, as a result of which the present invention was made to solve problems by: 1) forming a stretchable part of an elastic non-woven material, while stretchable the material will be secured from the user sheet of non-woven material, and the non-woven material and stretch material will move as a whole; 2) the placement of the forming cell sheet, formed from a nonwoven material, on one part of the surface in contact with the skin, in the area that forms the stretch part; and 3) the formation of compounds that provide an intermittent connection of the forming cell of the sheet and the stretchable part in the direction of contraction of the stretchable part, as a result of which the cells, which extend so that they cross the direction of contraction of the stretchable part, will have a certain shape and will be formed between the layers, formed by a sheet forming a cell, and a stretching part. In particular, in accordance with the present invention, the following disposable diaper has been developed.

[1] A disposable diaper comprising a front cover portion and a rear cover portion that covers the wearer's body, in addition to the portion covering the inside of the legs, with an absorbent element located therein that covers the inside of the legs of the user, in which: at least one of the front cover portion, the rear cover portion, and the portion that covers the inside of the legs includes a stretch portion formed of an elastic nonwoven material; the stretch material in the elastic nonwoven material is attached to the nonwoven material, and the sheet of nonwoven material and the stretch material move as a whole; the stretching part is formed with the possibility of constriction, at least in one of two directions, representing the direction of the body and the direction of the edge of the part covering the inner sides of the legs; the sheet forming the cells and containing non-woven material is located on a portion of the skin contact surface in an area that is formed by the stretch portion; and connections are formed that provide an intermittent connection of the sheet forming the cell and the stretch part in the direction in which the stretch part is pulled, whereby cells are formed and formed between the layers formed by the sheet forming the cell and the stretch part, while these cells continue so as to cross the direction in which the stretched portion is pulled together.

[2] The disposable diaper according to [1], wherein the cells are impervious, while they are open at one end and closed at the other.

[3] The disposable diaper according to [2], wherein the cells include outward facing cells in which the edges of the cells closest to the space external to the diaper are open, while the edges of the cells are farthest from the space, outer with respect to the diaper, are closed by joints, and inwardly facing cells in which the edges of the cells farthest from the space outer with respect to the diaper are open, and the edges of the cells closest to the space external with respect to the diaper are closed with unions.

[4] The disposable diaper according to [3], wherein the multiple cells are formed as rows of cells arranged parallel to the pull direction, and the rows of cells are arranged such that outwardly facing cells and inwardly facing cells alternate.

[5] The disposable diaper according to [4], wherein the compounds comprise either zigzag or wavy lines extending continuously in the pulling direction, and as a result of the connections, outward facing cells and inward facing cells are alternately formed with defined boundaries and formed.

[6] A disposable diaper according to any one of [1] to [5], wherein the multiple cells are formed as rows of cells arranged parallel to the pull direction, and the rows of cells are arranged in several tiers facing the intersection direction and the multiple rows of cells are arranged so that some of the compounds that define the boundaries of the cells and form cells in one row of cells that continue in the direction of intersection, and some of the compounds that define the boundaries of cells and form cells in a row of cells adjacent to the the aforementioned series of cells extending in the direction of intersection are not located in the same straight line.

[7] The disposable diaper according to [6], wherein the multiple rows of cells are arranged such that an elongated line extending from a portion of the joints that define the boundaries of the cells and form cells in the form of one row of cells extending in the direction of intersection passes through the cells in a row of cells adjacent to the aforementioned row of cells.

[8] The disposable diaper according to [1], wherein the stretchable portion is formed of an elastic nonwoven fabric at least at the edge of the portion covering the inner sides of the legs, so that it is pulled together to ensure alignment from the usable edge of the portion covering the inner sides legs, the cell-forming sheet containing a water-repellent non-woven material, is located over a portion of the skin contacting surface of the part covering the inner sides of the legs, and compounds are formed that provide intermittent connection of the sheet forming the cell and the stretchable part in a direction corresponding to the direction of the edge of the part covering the inner sides of the legs, as a result of which the cells are formed with defined boundaries and are formed between the layers formed by the sheet forming the cell and the stretchable part, the cells continue so that they cross the edge of the part covering the inside of the legs.

[9] The disposable diaper according to [8], wherein, in the part covering the inside of the legs, the stretch part is formed of an elastic nonwoven material at least at the edge of the back cover part so that it is pulled toward the body, forming cells a sheet comprising a water-repellent non-woven material is arranged over a portion of the skin contacting surface of the edge of the rear covering portion, and compounds are formed that provide intermittent connection of the sheet forming the cells, and astyagivayuscheysya portion toward the body, whereby the cells are formed with defined borders and are formed between the layers formed by the sheet forming cells, and the stretchable portion, wherein the cells extend so that they intersect the direction of the trunk.

[10] The disposable diaper according to [9], wherein the stretch portion in the front cover portion is formed of an elastic nonwoven fabric at least at the edge of the portion that covers the inside of the legs, so that it pulls toward the body to form cells a sheet containing a water-repellent non-woven material is located over a portion of the skin-contacting surface of the edge of the part covering the inner sides of the legs, and compounds are formed that provide intermittent connection of the sheet azuyuschego cell and stretchable portion in the body, whereby the cells are formed with defined borders and are formed between the layers formed by the sheet forming cells, and the stretchable portion, wherein the cells extend so that they intersect the direction of the trunk.

[11] The disposable diaper according to [10], wherein at least one of the stretchable parts formed at the edge of the part covering the inside of the legs, the edge of the part covering the inside of the legs in the front covering part and / or the edge the back cover portion in the portion covering the inner sides of the legs is positioned continuously to form a stretchable leg portion that spans the legs of the user, and joints are formed that provide an intermittent connection of the sheet forming the cells and p of the expandable leg portion in the direction of pulling of the stretch leg portion, as a result of which the cells are formed with defined boundaries and are formed between the layers formed by the sheet forming the cell and the stretch portion, wherein the cells extend so that they intersect the direction of pulling of the stretch leg portion .

[12] A disposable diaper according to any one of [8] to [11], wherein the stretch portion comprises a plurality of layers formed by sheets of nonwoven fabric between which the stretch material is located, and further, the stretch material is attached to the plurality of sheets of nonwoven fabric, and a plurality of sheets of nonwoven fabric and stretch material move as a unit.

[13] The disposable diaper according to any one of [8] to [11], wherein the elastic film is attached to the nonwoven fabric sheet, and the nonwoven fabric sheet and the elastic sheet are moved integrally.

[14] A disposable diaper according to any one of [8] to [11], wherein the cell-forming sheet and the stretch part are connected by joints formed as discontinuous in the direction of constriction of the stretch part and as continuous in a direction perpendicular to the direction of constriction of the stretch part .

[15] A disposable diaper according to any one of [8] to [11], wherein the cell-forming sheet and the stretchable part are connected by joints formed as discontinuous both in the direction of constriction of the stretchable part and in a direction perpendicular to the direction of constriction of the stretchable part .

The disposable diaper according to the present invention provides excellent flexibility, cushioning properties, breathability and moisture removal in stretchable material placed on the waist edge in the part covering the lower back and on the edges of the part covering the inside of the legs (e.g., on the circumference leg holes) etc., and can be easily made. In addition, the zones in which the stretch material is located effectively prevent the leakage of body secretions.

Brief Description of the Drawings

[Figa] is a typical front view of a disposable diaper, which is one embodiment of the present invention.

[Fig. 1B] shows the disposable diaper shown in Fig. 1A in expanded form and shows a typical outer contour in a plan view when viewed in the direction / from the side of the top sheet.

[Fig. 1C] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 1B.

[Fig. 1D] shows a typical outer contour in a side view, in section along the line B-B ′ of the edge of the disposable diaper depicted in Fig. 1B.

[Fig. 1E] shows the disposable diaper shown in Fig. 1A in expanded form and shows a typical outer contour in a plan view when viewed in the direction / from the side of the outer sheet.

[Fig. 1F] shows a typical perspective angle view of the stretchable portion of the disposable diaper of Fig. 1A.

[Fig. 1G] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 1F.

[Fig. 2A] shows an enlarged view of an embodiment of the connections in the disposable diaper shown in Fig. 1B, and shows a typical outer contour in plan view when viewed in the direction / from the top sheet.

[Fig. 2B] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 2A.

[Fig. 2C] shows a typical outer contour in a side view, in section along the line Y-Y ′ of the edge of the disposable diaper depicted in FIG. 2A.

[Fig. 3A] shows an enlarged view of an embodiment of the connections in the disposable diaper of the present invention and shows a typical outer contour in plan view when viewed in the direction / from the side of the top sheet.

[Fig. 3B] shows a typical outer contour in a side view, in section along the line Y-Y ′ of the edge of the disposable diaper depicted in FIG. 3A.

[Fig. 4A] shows an enlarged view of another embodiment of the connections in the disposable diaper of the present invention and shows a typical outer contour in plan view when viewed in the direction / from the top sheet side.

[Fig. 4B] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 4A.

[Fig. 4C] shows a typical outer contour in a side view, in section along the line Y-Y ′ of the edge of the disposable diaper depicted in FIG. 4A.

[Fig. 5A] shows an enlarged view of a further other embodiment of the connections in the disposable diaper of the present invention and shows a typical external contour in plan view when viewed in the direction / from the top sheet side.

[Fig. 5B] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 5A.

[Fig. 6A] shows an enlarged view of a further other embodiment of the connections in the disposable diaper of the present invention and shows a typical outer contour in plan view when viewed in the direction / from the side of the top sheet.

[Fig. 6B] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 6A.

[Fig. 6C] shows a typical outer contour in a side view, in section along the line Y-Y ′ of the edge of the disposable diaper depicted in FIG. 6A.

[Fig. 7A] shows an enlarged view of another embodiment of the connections in the disposable diaper of the present invention and shows a typical outer contour in plan view when viewed in the direction / from the top sheet side.

[Fig. 7B] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 7A.

[Fig. 7C] shows a typical outer contour in a side view, in section along the line Y-Y ′ of the edge of the disposable diaper depicted in FIG. 7A.

[Fig. 8A] shows an enlarged view of a further other embodiment of the connections in the disposable diaper of the present invention and shows a typical outer contour in plan view when viewed in the direction / from the top sheet side.

[Fig. 8B] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 8A.

[Fig. 8C] shows a typical outer contour in a side view, in section along the line Y-Y ′ of the edge of the disposable diaper depicted in FIG. 8A.

[Fig. 9] shows an enlarged view of a further other embodiment of the connections in the disposable diaper of the present invention and shows a typical outer contour in plan view when viewed in the direction / from the side of the top sheet.

[Fig. 10A] is a modification of the disposable diaper depicted in Fig. 8A, and shows a typical outer contour in a side view in section, equivalent to an edge in section along the line X-X ′ in Fig. 8A.

[Fig. 11] is a further modification of the disposable diaper shown in Fig. 8A, and shows a typical outer contour in a side view in cross section, equivalent to the edge in the cross section along line X-X ′ of Fig. 8A.

[Fig. 11A] shows a typical schematic illustration of a manufacturing process for the disposable diaper of Fig. 1A and shows each process step when viewed in the direction / from the side of the inner sheet.

[Fig. 11B] shows a typical outer contour in a side view showing the edge in cross section obtained by performing a cross section in the center in the width direction of the structural member shown in Fig. 11A for each process operation shown in Fig. 11A.

[Fig. 12A] shows a typical oblique perspective view of a disposable diaper according to another embodiment of the present invention.

[Fig. 12B] shows the disposable diaper shown in Fig. 12A in expanded form and shows a typical outer contour in a plan view when viewed in the direction / from the side of the top sheet, with a partial tear.

[Fig. 12C] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 12B.

[Fig. 12D] shows a typical outer contour in a side view, in section along the line B-B ′ of the edge of the disposable diaper depicted in Fig. 12B.

[Fig. 12E] shows the disposable diaper shown in Fig. 12A in expanded form and shows a typical outer contour in a plan view when viewed in the direction / from the side of the outer sheet.

[Fig. 12F] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 12B during use.

[Fig. 13A] shows a typical outer contour in a plan view of a disposable diaper according to a further another embodiment of the present invention.

[Fig. 13B] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 13A.

[Fig. 13C] shows a typical outer contour in an end view, in section along the line B-B ′ of the edge of the disposable diaper depicted in FIG. 13A.

[Fig. 13D] shows the outer contour in a rear view of the disposable diaper depicted in Fig. 13A.

[Fig. 14A] shows a typical outer contour in a plan view of an elastic nonwoven material that is a component of the disposable diaper of Fig. 13A.

[Fig. 14B] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the elastic nonwoven fabric shown in FIG. 14A.

[Fig. 14C] shows a typical outer contour in a side view, in section along the line B-B ′, of the edge of the elastic nonwoven fabric shown in FIG. 14A.

[Fig. 15A] shows a typical outer contour in a plan view of a disposable diaper according to one embodiment of the present invention.

[Fig. 15B] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 15A.

[Fig. 15C] shows the outer contour in a rear view of the disposable diaper depicted in Fig. 15A.

[Fig. 15D] shows a typical oblique perspective view of the stretchable portion of the disposable diaper depicted in Fig. 15A.

[Fig. 15E] shows a typical outer contour in a side view, in section along the line X-X ′ of the edge of the disposable diaper depicted in FIG. 15D.

[Fig. 15F] shows an enlarged view of an embodiment of the connections in the disposable diaper shown in Fig. 15A, and shows a typical outer contour in plan view in a state where the sheet forming the cells is detached.

[Fig. 16A] shows an enlarged view of another embodiment of the connections in a disposable diaper, and shows a typical outer contour in plan view in a state where the sheet forming the cells is detached.

[Fig. 16B] shows an enlarged view of a further other embodiment of the connections in the disposable diaper and shows a typical outer contour in plan view in a state where the sheet forming the cells is detached.

[Fig. 16C] shows an enlarged view of yet another additional other embodiment of the connections in the disposable diaper and shows a typical outer contour in plan view in a state where the sheet forming the cells is detached.

[Fig. 17A] shows a typical outer contour in a plan view of another embodiment of a disposable diaper of the present invention.

[Fig. 17B] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in Fig. 17A.

[Fig. 17C] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 17A, during use.

[Fig. 18A] shows a typical outer loop in an end view of a further other embodiment of a disposable diaper of the present invention. It shows an edge in section corresponding to an edge in section shown in FIG. 17C during use.

[Fig. 18B] shows a typical outer contour in the end view of yet another additional other embodiment of a disposable diaper of the present invention. It shows an edge in section corresponding to an edge in section shown in FIG. 17C during use.

[Fig. 19A] shows a typical oblique perspective view of another embodiment of a disposable diaper of the present invention.

[Fig. 19B] shows the disposable diaper shown in Fig. 19A in expanded form and shows a typical outer contour in plan view when viewed in the direction / from the side of the top sheet.

[Fig. 19C] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 19B.

[Fig. 19D] shows a typical outer contour in a side view, in section along the line B-B ′ of the edge of the disposable diaper depicted in Fig. 19B.

[Fig. 19E] shows the disposable diaper shown in Fig. 19A in expanded form and shows a typical outer contour in a plan view when viewed in the direction / from the side of the outer sheet.

[Fig. 20A] shows the disposable diaper of the present invention in expanded form and shows a typical outer contour in a plan view, when viewed in the direction / from the side of the top sheet.

[Fig. 20B] shows a typical outer contour in an end view, in section along the line A-A ′ of the edge of the disposable diaper depicted in FIG. 20A.

[Fig. 20C] shows a typical outer contour in a side view, in section along the line B-B ′ of the edge of the disposable diaper depicted in FIG. 20A.

Embodiments of the invention

The following is a description of practicable embodiments of a disposable diaper of the present invention, with reference to schematic images. The components and materials are numbered concurrently, and in some cases no explanation is given if the same component is used. A typical oblique view of the disposable diaper 201B in FIG. 20A is the same as that shown in FIG. 12A. In addition, a typical plan view of the outer contour, which shows the disposable diaper 201B in expanded form when viewed in the direction / from the side of the top sheet, is the same as that shown in FIG. As a result, the description of the disposable diaper 201B should be read with further reference to FIG. 12A and FIG.

[1] The basic configuration of the disposable diaper of the present invention:

The disposable diaper of the present invention comprises, as shown by the disposable diaper 1A in FIG. 1A, FIG. 1B and FIG. 1D, and the disposable diaper 1B in FIG. 19A, FIG. 19B and FIG. 19D, a front cover portion 2 and a back cover portion 6 that covers the body of the wearer, along with a portion 4 covering the inside of the legs, which covers the inside of the legs of the wearer and in which the absorbent member 22 is located.

[1-1] Disposable diaper:

The “disposable diaper” encompasses various embodiments, including panty-shaped diapers and tape-fastened diapers. However, the present invention broadly encompasses disposable diapers having these specific features, and is not limited to diapers with a panty shape similar to those shown below, or tape fastened diapers, etc.

[1-2] Front cover and rear cover:

The terms “front cover” and “rear cover” refer to the parts of the disposable diaper that cover the user's torso.

In this description, for cases in which the absorbent element is located continuously from the part covering the inner sides of the legs, all the way to the front covering part and the back covering part, that part of the edge of the absorbent element, which is located on the side of the waist edge, and its continuation are called " lap coating ", while that part of the edge of the absorbent element, which is located on the inner side of the legs, and its continuation, are called" imitation of the coating.

The expression “close the torso” indicates an embodiment in which a portion of the disposable diaper is converted to a cylindrical configuration and encompasses a user's torso or in which a cylindrical configuration can be formed. The panty-shaped disposable diaper is one example of a diaper in “an embodiment convertible into a cylindrical configuration”.

The expression “shaped like a coward” refers to a disposable diaper presented in the form of a coward in which the waist opening 10 and the left and right leg openings 12 are preformed as shown by the disposable diaper 1A in FIG. 1A and the disposable diaper 1B on figa.

In embodiments of the disposable diaper 1A shown in FIG. 1A, FIG. 1B and FIG. 1E, and the disposable diaper 1B shown in FIG. 19A, FIG. 19B and FIG. 19E, the edges 62a and 62b of the outer material 62 of the front parts and edges 65a and 65b of the outer material 65 of the rear part are connected to each other to form a cylindrical configuration that provides coverage of the user's torso. In this embodiment, the cylindrical configuration is formed by a part of the outer material 16 between the left and right connections 7 and 8. As a result, these parts are called the front cover part 2 or the back cover part 6.

In the disposable diaper 1A shown in FIG. 1A, FIG. 1B and FIG. 1E, and the disposable diaper 1B shown in FIG. 19A, FIG. 19B and FIG. 19E, the outer material 16 is formed from an outer material 62 of the front portion and outer material 65 of the back. Diapers in which the outer material is not divided into the outer material of the front part and the outer material of the rear part, but, on the contrary, configured in one piece, also represent an embodiment of the diaper, "shaped like a coward", provided that they are pre-made so that they have a hole for the waist and left and right openings for the legs.

For example, in the disposable diaper 201A shown in FIG. 12A, FIG. 12B and FIG. 12E, and the disposable diaper 201B shown in FIG. 20A, edges 202a and 202b and edges 206a and 206b of outer material 216 configured as single pieces are connected together in an embodiment converted to a cylindrical configuration, providing coverage of the user's torso. In an embodiment of this type, a cylindrical configuration is formed by a part of the outer material 216 between the left and right connections 207 and 208. As a result, these parts are called the front cover portion 202 or the rear cover portion 206.

An example of a diaper that "can be converted into a cylindrical configuration" is a disposable diaper shaped like a panty, or a disposable diaper fastened with a tape.

The expression “shaped like a coward” refers to diapers in the same embodiments as the embodiments of the disposable diaper 1A shown in FIG. 1A, FIG. 1B and FIG. 1E, and the disposable diaper 1B shown in FIG. 19A , FIG. 19B and FIG. 19E, as well as embodiments of the disposable diaper 201A shown in FIG. 12A, FIG. 12B and FIG. 12E, and the disposable diaper 201B shown in FIG. 20A, in which fastening elements (mechanical fasteners items, etc.) are provided instead of joints 7 and 8 and joints 207 and 208, which makes the diaper wearable and removable.

With this type of diaper “shaped like a coward,” the part of the outer material that covers the front of the wearer and the part that covers the back of the wearer can be fastened to each other along the edges of these parts due to the adhesion of the fastening element. As a result, it is possible to form a cylindrical configuration that provides coverage of the user's torso. When using diapers “shaped like cowards,” a cylindrical configuration is formed by means of parts between fastening elements on the left and right edges of the outer material. As a result, these parts are called the front cover portion and the rear cover portion.

The term “tape-fastened” refers to disposable diapers, such as the disposable diaper 301A shown in FIGS. 13A and 13D, and the disposable diaper 301B shown in FIGS. 15A and 15D, in which a holding tape 311 is provided, continuing from the left and right edges of the part covering the back side of the user (in the figures these are the edges 374a and 374b of the rear side flap 374).

The “tape fastened” diapers have a fastening material (in the drawings, this is a material 348 with hooks of a mechanical fastening element) as part of the material 350 forming the holding tape 311, as shown in FIG. 13A, FIG. 13D, FIG. 15A and FIG. 15D. Attaching it to the fastening material on the part covering the front side of the user (in the figures, this is material 346 with loops of the mechanical fastening element provided on the front cover 313), it makes it possible to form a cylindrical configuration that provides coverage of the user's torso.

Diapers “fastened with a tape” are not previously transformed into a cylindrical configuration like diapers “shaped like cowards”. For this reason, the “front cover part” and the “back cover part” of the diapers “tape fastened” are defined as follows in accordance with the formation of the main part of the diaper formed from the absorbent member and the sheet material (top sheet, back sheet, side sheet, etc. .d.) that cover the absorbent element.

For cases in which the main part of the diaper is formed in the form of an hourglass (the front and back waist edges are wide, while the constrictions are formed on the inside of the legs, similar to the shape shown by the outer material 216 in FIG. 12B and FIG. 20A), zone between the straight line connecting the points of origin of the constrictions on the side of the waist edge in the front of the diaper and the waist line in the front of the diaper is called the “front covering part”, while the area between the straight line connecting the points of the beginning of the constriction on c the crown of the waist at the back of the diaper, and the waist at the back of the diaper is called the “back covering portion”.

For cases in which the rear side flap 374 is provided separately from the diaper body 370 on the waist side 370c of the diaper body 370 and further, the front side valve 372 is provided separately from the diaper body 370 on the waist side of the diaper 370d of the diaper body 370 as shown in the disposable diaper 301A in FIGS. 13A and 13D and in the disposable diaper 301B in FIGS. 15A and 15C, the area between the straight lines connecting the intersections between the front side flap 372 at the orone of the diaper corresponding to the inside of the legs, and the edges 370a and 370b of the diaper body 370 and the waist edge 370d are called the “front covering part”, while the area between the straight lines connecting the intersection between the rear side flap 374 on the diaper side, corresponding to the inside of the legs, and the edges 370a and 370b of the diaper body 370, and the waist edge 370c is called the “back covering portion”.

For cases in which the main part of the diaper is made only with a separate rear side valve and no front side valve is provided, the area between the straight line connecting the intersection between the rear side valve on the side of the diaper corresponding to the inside of the legs and the edges of the main part of the diaper, and the waist edge is called the “back covering part”, while the area that overlaps the “back covering part” when the main part of the diaper is folded so that the waist edges cover the other g friend, called the "front closing part."

[1-3] The part covering the inner sides of the legs:

The “part covering the inside of the legs”, in the case of disposable diapers, is the part that covers the inside of the legs of the user. In other words, this is the part between the front cover portion and the rear cover portion.

The part covering the inner sides of the legs is provided with an absorbent element designed to absorb and retain body secretions. No particular restrictions are placed on the configuration of the absorbent element, any absorbent element used in known absorbent products may be used. The specific configuration of the absorbent element is discussed below.

In the disposable diaper 1A shown in FIG. 1A, FIG. 1B, FIG. 1D and FIG. 1E, and the disposable diaper 1B shown in FIG. 19A, FIG. 19B, FIG. 19D and FIG. 19E, absorbent means 14 is positioned so that it extends between the outer material 62 of the front part and the outer material 65 of the rear part and is attached at a predetermined location (joint 28). In this embodiment, the front cover portion 2 is formed from the outer material 62 of the front portion, the rear cover portion 6 is formed from the portion of the cover material 65 of the rear portion, and the portion 4 covering the inside of the legs is formed from the portion of the outer material 65 of the rear portion and the absorbent part 14. The absorbent element 22 is located as one of the structural elements of the absorbent means 14.

In the disposable diaper 201A shown in FIG. 12A, FIG. 12B, FIG. 12D and FIG. 12E, and the disposable diaper 201B shown in FIG. 20A and FIG. 20C, a portion 204 covering the inside of the legs is formed from the absorbent means 14 and the outer material 216. The area at the edge of the outer material 216 between the straight line connecting the starting points of the constrictions on the side of the waist edge 202c and the straight line connecting the starting points of the narrowing on the side of the waist edge 206c is a part 204 covering the inside legs.

In the disposable diaper 301A shown in FIGS. 13A and 13D, and the disposable diaper 301B shown in FIGS. 15A and 15D, a portion 304 covering the inside of the legs is formed from the diaper body 370. The area between the straight line connecting the intersection of the front side flap 372 on the diaper side corresponding to the inside of the legs and the edges 370a and 370b of the diaper body 370 and the straight line connecting the rear side flap 374 on the diaper side corresponding to the inside of the legs, and the edges 370a and 370b of the diaper body 370 are a portion 304 covering the inside of the legs.

[2] Distinctive structural elements of a disposable diaper of the present invention:

The disposable diaper of the present invention may take the form of the first or second embodiments described below.

[2-1] First embodiment:

The first embodiment of the disposable diaper of the present invention, as shown by the disposable diaper 1A in FIG. 1B and FIG. 1D, is characterized in that it has a rear cover portion 6, etc. in addition to the stretch portion 80 containing elastic non-woven material, while the stretch portion 80 is formed so that it is pulled in the direction of the body, etc. In addition to this: 1) the stretch portion comprises a stretch material attached to a sheet of nonwoven material formed from an elastic nonwoven material, while the sheet of nonwoven material and the stretch material move as a whole; 2) sheet 82, forming cells and containing non-woven material, is located on the site of the skin contacting surface of the zone formed by the stretching part 80; 3) joints 84 are formed for connecting the sheet 82 forming the cell and the stretch portion 80, and through the joints 84, the cells 86 are formed with defined boundaries and are formed in the direction crossing the direction of contraction of the stretch portion 80 between the layers formed by the sheet 82 forming mesh, and stretchable part 80; and 4) the cells 86 are impermeable, while they are open at one edge and closed at the other.

As shown in the disposable diaper in FIGS. 1F and 1G, pulling together the stretch portion 80 causes a decrease in the distance between the joints 84 connecting the cell sheet 82 and the stretch portion 80. As a result, the cell forming sheet 82 and the stretch portion 80 bend, causing deformation with the formation of a wavy shape, and the zone of the sheet 82 forming the cell and the stretching part 80, other than joints 84 (unconnected zones), are separated, forming cells 86, which serve as ventilation pipes ok and shock absorbing elements / pillows.

In the aforementioned design, it is possible to absorb moisture accumulating in the interior of the diaper in the cells 86. As a result, moisture accumulates and condenses on the surface of the sheet 82 forming the cell and applied as a layer on the stretch portion 80 (the skin contacting surface directly on top of the stretch portion 80 ), which helps prevent skin problems. In addition, since there is no tendency for moisture to condense on the skin contacting surface directly over the stretch portion 80, it is possible to maintain a dry state on the skin contacting surface, which contributes to comfortable wearing.

In addition, when the user moves (moves from a standing position to a sitting position, walking, etc.), the diaper changes shape, while cells 86 also change shape under the influence of this deformation. In accordance with the deformation of the cells 86, air and moisture located in the inner space of the diaper are absorbed into the cells 86 and then released from the cells 86, and these processes are repeated several times. In particular, in the aforementioned structure, the cells 86 are open on one edge and closed on the other, as shown in FIG. 1F and FIG. 2B, and the edge of the sheet forming sheet 82 at the corresponding hole is a free edge. As a result, the movement of the cell forming sheet 82 and the stretching portion 80 is not limited, and the cell forming sheet 82 and the stretching portion 80 can be sufficiently bent. In other words, cells 86 can be wide open. This helps to ventilate and remove moisture from the inside of the diaper, which provides a comfortable environment in the space inside the diaper.

In addition, the cells function as a shock absorber in the form of an air cushion. Consequently, they are soft to the skin and provide increased flexibility of the diaper around the waist. In other words, this allows the user to achieve a comfortable wearing state. In particular, the aforementioned configuration makes it possible to bend the sheet forming sheet 82 and the stretch portion 80 sufficiently to form highly convex zones by the sheet forming sheet 82 and the stretch portion 80. As a result, the cells 86 have a three-dimensional structure and, in addition, close the gap between the skin of the wearer and the stretch portion 80 with high efficiency. In other words, they have excellent flexibility and shock absorbing properties and are effective in preventing leaks.

In addition, since the cells in the disposable diaper of the present invention are impervious and are open at one end and closed at the other, body excretions cannot leak out through their passage through the cells. There is also the possibility of trapping the body’s secretions in cells when the secretions pass through the diaper. For this reason, the cells not only prevent the leakage of body secretions, but they also provide increased flexibility and breathability of the stretched part.

[2-2] Second embodiment:

A second embodiment of the disposable diaper of the present invention, as shown by the disposable diaper 301B in FIGS. 15A to 15C, is characterized by: 1) a stretch portion 380 comprising a stretch material attached to a sheet of nonwoven fabric formed from an elastic nonwoven fabric, wherein the sheet of nonwoven material and the stretch material move as a unit; 2) the fact that, at least, the left and right edges of the part 304, covering the inner sides of the legs, contain a stretching part 380; 3) the fact that the stretch portion 380 is formed so that it is pulled along the edge of the portion 304 covering the inner sides of the legs (in this example, along the edges 370a and 370b of the diaper body 370; 4) a sheet 382 forming a cell containing a water-repellent non-woven material, located on the site of the skin contacting surface of the portion 304 covering the inside of the legs; 5) connections 384, formed so that they provide an intermittent connection of the sheet 382 forming the cell, and the stretch portion 380 to ensure alignment from the user edge of the portion 304 covering the inner sides of the legs; and 6) in that, as a result of the presence of joints 384, cells 386 are formed with defined boundaries and are formed in the direction crossing the portion 304 covering the inside of the legs between the layers formed by the cell forming sheet 382 and the stretching part 380.

As shown in FIG. 15D and FIG. 15E, in this type of disposable diaper, the distance between the joints 384 on the sheet forming sheet 382 is also reduced by tightening the stretch portion 380. As a result, the sheet forming sheet 382 bends, causing deformation with the formation of a wavy shape, and the zone of the sheet 382 forming the cell, and the stretch portion 380, other than the joints 384 (unconnected zones), are separated, forming cells 386, which serve as ventilation tubes and shock absorbing elements / pillows.

Cells 386 function as a shock absorber in the form of an air cushion. Consequently, they are soft to the skin and provide increased flexibility of the diaper around the waist. In other words, this allows the user to achieve a comfortable wearing state.

In addition, when the user moves from a standing to a sitting position, the diaper is squeezed from the outside, which causes the release of moisture in the inner space of the diaper through the cells 386 into the outer space. In addition, since when the user walks, the part of the diaper that covers the inner sides of the legs changes shape when the legs move, this deformation leads to the release of moisture from the inner space of the diaper into the outer space, while in return air from the outer space passes into the inner space of the diaper. As a result, the interior of the diaper maintains a comfortable environment.

[2-3] Stretchable part:

The stretch portion is formed from an elastic nonwoven material. The term “elastic non-woven material” encompasses non-woven materials that are elastic in themselves, or non-woven materials formed from base materials of a non-woven fabric, attached (attached, etc.) to a stretch material in its stretched state (elastic material, such as rubber or thermoplastic elastomer, etc.) to increase elasticity.

Examples of non-woven material, which is itself elastic, include industrially manufactured and commercially available, elastic non-woven material, elastomeric non-woven material of a spunbond production method, etc. In particular, (the names below are well-known brands) Straflex (manufactured by Idemitsu Unitech), Espansione (manufactured by KB Seiren), etc. are optimal for this purpose. These elastic non-woven materials and elastomeric non-woven materials of a spunbond production method are non-woven materials that are themselves elastic.

Non-woven materials attached to the stretch material in its stretched state to increase elasticity can be formed by bonding, etc. non-woven material and stretch material in an appropriate combination. For example, in the material forming the stretch portion 381 of the disposable diaper 301A shown in FIGS. 13A and 13C, elastic nonwoven fabric is used comprising the nonwoven sheets 397 and 398 shown in FIGS. 14A to 14C, between which stretch the material 399 is stacked in its expanded state, and the stretch material 399 is attached to the nonwoven fabric sheets 397 and 398 so that the nonwoven fabric sheets 397 and 398 and the stretch material 399 move as a unit. The use of this elastic non-woven material in which the non-woven material and the stretch material are moved integrally differs from the absorbent article having the shape of cowards in Patent Documents 1-5 in that the stretch material no longer extends beyond the width of the sheet. When stretching the stretch material, the ideal stretch ratio is not exceeded, and the stretch material cannot be stretched excessively.

In addition, the elastic nonwoven fabric may take the form of an elastic film attached to the nonwoven fabric sheet such that the nonwoven fabric sheet and the elastic film move as a unit. This type of elastic non-woven material and the type formed from the stretch material in its stretched state, which is fixed between the layers formed by the sheets of non-woven material, give the same effect. The elastic nonwoven material in this embodiment includes an elastic film attached at least on one side to the sheet of nonwoven material. An elastic film can be attached on both sides to a sheet of nonwoven material.

In general, disposable diapers are configured so that they have linear stretch material laid between sheets of nonwoven fabric. As a result, there is no need for the stretch portion to be formed from an independent elastic nonwoven material, and the stretch portion can be formed from a portion of the conventional disposable diaper configuration used as the elastic nonwoven fabric.

In the disposable diaper 1A shown in FIG. 1D, a stretch material 42 is used for the waist, laid in its stretched state between the folded portion 88 and the holding sheet 68 of the outer sheet 63 containing the outer material 62 of the front portion, and between the folded portion 88 and the holding sheet 68 of the outer sheet 66 containing the outer material 65 of the rear. In addition, the stretch material 42 for the waist is secured from the user-folded portion 88 and the holding sheet 68. In other words, the elastic, non-woven material moving (stretch part 80) comprises the folded part 88, the holding sheet 68 and the stretch material 42 for the waist.

In addition, in the disposable diaper 201A shown in FIG. 12C and the disposable diaper 201B shown in FIG. 20B, three-dimensional assemblies are used, stretchable material 36 in its expanded state, laid between the main body of the nonwoven sheet 32 and folded the part that forms the three-dimensional assembly 26. In addition, forming a three-dimensional assembly, the stretchable material 36 is attached to the main part of the sheet 32 of nonwoven material and the folded part. In other words, the elastic, non-woven material moving as a whole (stretch part 280) contains the main part of the non-woven sheet 32, the folded part and forming three-dimensional assemblies, the stretch material 36.

In addition, the disposable diaper 301C shown in FIG. 17C uses a three-dimensional assembly forming, stretchable material 337 in its stretched state, laid between the nonwoven fabric sheet 333 and the main body 379 of the non-woven fabric sheet 334 that form the three-dimensional assemblies 327. The forming three-dimensional assemblies, stretch material 337 is attached to the non-woven fabric sheet 333 and to the base material 379, and as a result moving as a whole, elastic non-woven material (stretch part 381) with holding sheet 333 of non-woven material, the base material 379 and forming a three-dimensional assembly 337 stretchable material.

At the same time, in the disposable diaper 1B shown in FIG. 19C, a three-dimensional assembly forming is used, stretchable material 36 in its stretched condition, laid between the main part of the nonwoven fabric sheet 32 and the folded part that form the three-dimensional assembly 26. The three-dimensional assembly stretchable material 36 is attached to the main part of the nonwoven fabric sheet 32 and the folded part, and as a result, the elastic, nonwoven fabric (stretchable part 81) moving as a whole INH bulk of the nonwoven fabric sheet 32, and folded portion forming a three-dimensional assembly, stretchable material 36.

In addition, the disposable diaper 301A shown in FIG. 13B and the disposable diaper 301B shown in FIG. 15B have stretchable leg material 340C placed in its extended state between the side sheet 319 and the back sheet 320 or between the side sheet 319 and a cover sheet 324 forming the diaper body 370. Stretchable foot material 340 is attached to the side sheet 319, the back sheet 320 and / or the cover sheet 324. In other words, the seamless, flexible non-woven fabric (stretch portion 380) that travels includes a side sheet 319, a back sheet 320, a cover sheet 324 and stretch material 340 for legs.

In the first embodiment, the stretch part is formed with the possibility of constriction in at least one of two directions, representing the direction of the body and the direction of the edge of the part covering the inner sides of the legs, at least one of the front covering part, the back covering part and the part covering the inside of the legs.

The disposable diaper 1A shown in FIG. 1D, for example, has a stretch portion 80, which is formed to contract in the direction of the torso, in the outer material 62 of the front part forming the front covering part 2. In addition, the outer material 65 of the back part forming the rear covering part 6, has a stretching part 80, formed with the possibility of pulling in the direction of the body. In addition, the disposable diaper 201A shown in FIG. 12C has a stretch portion 280 in the absorbent body 14 forming a portion covering the inside of the legs, while this stretch portion 280 is constricted to fit in with said edge. In addition, the disposable diaper 301A shown in FIG. 13C has a stretch portion 381 (elastic nonwoven fabric 396) formed to be pulled in the direction of the body (in other words, aligned with the waist edges 370c and 370d) in the diaper body 370, which comprises a front cover portion 302 and a rear cover portion 306.

In the second embodiment, the stretch part is formed with the possibility of contraction in accordance with the left and right edges of the part covering the inner sides of the legs. The disposable diaper 301B shown in FIG. 15B, for example, has a stretch portion 380 formed to be contractually aligned with the edges 370a and 370b of the diaper body 370, which forms a portion covering the inside of the legs. In addition, the disposable diaper 1B shown in FIG. 19C has a stretch portion 81 formed to be pulled together in accordance with the edge of the absorbent means 14 forming a portion covering the inside of the legs. The disposable diaper 201B of FIG. 20B has the same configuration of the stretch portion 81 as the disposable diaper 1B of FIG. 19C.

The expression "formed with the possibility of pulling in the direction of the body" indicates the placement of elastic non-woven material, carried out in such a way that it is possible to stretch and pull the diaper in the direction of the body. An example of the simplest configuration of this is seen in the disposable diaper 1A shown in FIG. 1E, in which a linear stretch material (in this example, stretch material 42 for the waist) is placed respectively in line with the waist edge of the front cover portion 2 (in this example, waist the edge 62c of the outer material 62 of the front part) or the waistband edge of the rear covering portion 6 (in this example, the waistband edge 65c of the outer material 65 of the back).

The expression "formed with the possibility of pulling in the direction of the edge of the part covering the inner sides of the legs" indicates the placement of elastic non-woven material, which is carried out in such a way that it is possible to stretch and pull the diaper in the direction of the edge of the part covering the inner sides of the legs. An example of the simplest configuration of this is seen in the disposable diaper 301A shown in FIG. 13B and FIG. 13D, and the disposable diaper 301B shown in FIG. 15B and FIG. 15C in which the linear stretch material (in this example, stretch material 340 for legs) is placed in alignment with the edge of the portion 304 covering the inner sides of the legs (in this example, these are the edges 370a and 370b of the diaper body 370).

However, the configuration is not limited to the above, provided that the elastic non-woven material is contracted in at least one of the direction of the body and the direction corresponding to the direction of the edge of the part covering the inner sides of the legs. For example, the stretchable material can be positioned so that it bends convexly up or down in the direction of the line of the trunk of the diaper or bends convexly to the left or right in accordance with the edge of the part covering the inner sides of the legs.

In the first embodiment, it is sufficient if the stretch portion is formed in at least one of the front cover portion, the rear cover portion, or the portion covering the inside of the legs. The attachment of the sheet forming the cells to these parts ensures the prevention of leakage of body secretions and increased flexibility. In other words, the location of the zone of formation of the stretchable part is not limited to the zones already described, namely the waist edge and the edge of the part covering the inner sides of the legs.

For example, in the disposable diaper 201A shown in FIG. 12C, a linear stretch material (in this example forming three-dimensional assemblies, stretch material 36) is placed on the upper edge of the three-dimensional assembly 26 added along the edge of the absorbent means 14 forming the part 204 covering the inner side of the legs, which ensures the formation of the stretch portion 280. This stretch portion 280 is attached to the sheet 282 forming the cell.

Furthermore, as shown in FIG. 1B and FIG. 1E, for cases in which the auxiliary stretch portion is formed by placing the auxiliary stretch material 44 in the front cover portion 2 or the rear cover portion 6, this secondary stretch portion may be attached to the cell forming sheet.

In addition, as in the disposable diaper 1A shown in FIG. 1A, FIG. 1B and FIG. 1E, for cases in which the stretch portion is continuously formed from the stretch portion formed by the auxiliary stretch material 44 at the edge of the portion 4, covering the inner sides of the legs, on the front covering part 2, from the stretch part formed by the stretch material 38 for the legs or forming a three-dimensional assembly, stretch material 36 on the edge of the part 4, which closes in the inner sides of the legs, and from the stretch portion formed by the stretch material 40 for the legs at the edge of the portion 4 covering the inner sides of the legs from the rear cover portion 6, it is preferable that the sheet forming the cells be attached to these stretch portions. In an embodiment of this type, it is possible to form a cellular structure of a type that will encompass the legs of the user. As a result, while preventing leakage of body excretion from the leg openings, there will also be the possibility of simultaneously increasing the flexibility of the area around the leg openings.

In the second embodiment, it is sufficient if the stretch part is formed at least on the left and right edges of the part covering the inner sides of the legs. However, the stretch portion may be formed in other zones. The intermittent connection of the stretch part with the sheet forming the cell provides increased flexibility similar to the left and right edges of the part covering the inner sides of the legs.

For example, as shown in FIG. 19E, for cases in which the stretch portion 80 is formed of an elastic nonwoven fabric in a portion 4 covering the inside of the legs at least at the edge of the rear cover portion 6, and the stretch portion 80 is pulled into the direction of the body, it is preferable that the cell-forming sheet 83, made of a water-repellent non-woven material, is placed on the skin-contacting surface at the edge of the rear covering portion 6, as shown in FIG. 19B. If the sheet 83 forming the cells is laid together with the stretching part, and the sheet 83 forming the cells, as well as the stretching part are connected by joints 85 formed by discontinuous and directed towards the body, there is the possibility of the formation of a cellular structure in part 4, covering the inner sides of the legs, at the edge of the back covering portion 6.

In addition, as shown in FIG. 19E, for cases in which the stretch portion 80 is formed of an elastic nonwoven fabric in the front cover portion 2, at least at the edge of the portion 4 covering the inside of the legs, and the stretch portion 80 is constricted in the direction of the body, it is preferable that the cell-forming sheet 83, made of water-repellent non-woven material, is placed on the surface of the skin contacting surface at the edge of the part 4 covering the inside of the legs, as shown in f g.19V. If the sheet-forming sheet 83 is laid together with the stretching part and the sheet-forming sheet 83 and the stretching part are joined by joints 85 formed by discontinuous and directed towards the body, there is the possibility of forming a mesh structure in the front covering part 2 at the edge part 4, covering the inner sides of the legs.

In addition, as in the disposable diaper 1B shown in FIGS. 19A to 19E, it is preferable that the stretch portion 81 formed at the edge of the portion 4 covering the inside of the legs is continuously located from the at least one of the stretch a portion 80 formed in the front cover portion 2 at the edge of the portion 4 covering the inner sides of the legs and a stretch portion 80 formed in portion 4 covering the inner sides of the legs at the edge of the rear cover portion 6 to form a stretch Xia parts for the legs, which covers the user's legs. Overlaying the sheets 82 and 83 forming the cells, together with the stretching part for the legs in its stretched state, and connecting the sheets 82 and 83, forming the cells, with the stretching part for the legs in its stretched state through joints 84 and 85 formed by intermittent and extending in the direction tightening, allows for a continuous arrangement of the cellular structure of the part 4, covering the inner sides of the legs, and the cellular structure of the front closing part 2 and / or the back closing part 6. This configuration is preferred, poskos ku it provides increased flexibility for the stretch of the legs.

[2-4] Sheet forming cells:

In the first embodiment, as shown in the disposable diaper 1A shown in FIG. 1D and FIG. 1F, the cell-forming sheet 82 comprising a water-repellent non-woven material is disposed on a skin-contacting surface in an area formed from the stretch portion 80. This the cell-forming sheet 82 forms a cellular structure that functions like ventilation tubes and a cushioning element.

In addition, in the second embodiment, as shown in the disposable diaper 301B shown in FIG. 15A, the cell-forming sheet 382 containing the water-repellent non-woven material is located on a skin-contacting surface in the portion 304 covering the inside of the legs. This cell forming sheet 382 forms a cellular structure in the area of the leg openings in the diaper, etc., which functions like ventilation tubes and a shock absorbing element.

A “skin contact surface” is a surface that comes into direct contact with a user's skin when wearing a disposable diaper, in other words, the innermost surface of a disposable diaper. As the “water-repellent non-woven material”, the same material can be used as that used for the side sheet discussed below. The use of a water-repellent non-woven material makes less leakage of body excretions through the sheet forming the cells.

The term "site" is associated with the fact that the sheet forming the cells does not need to be located on the entire surface of the stretch portion in contact with the skin. There are no special restrictions relating to the area in which the sheet forming the cells should be located.

However, in the first embodiment, as shown in FIG. 1D, it is preferable to place the cell-forming sheet 82 in an area close to the waist edge (in this example, to the waist edge 65c of the outer material 65 of the rear part) of the rear cover portion 6, and, in addition, it is preferable to place the cell-forming sheet 82 in an area close to the waist edge (in this example, to the waist edge 62c of the outer material 62 of the front portion) of the front cover portion 2. Furthermore, as shown in FIG. 13A, it is preferable to place the cell forming sheet 382 On the left and right edges of the part 4 covering the inner sides of the legs (in this example - in the area close to the edges 370a and 370b of the diaper main body 370). In any case, it is preferable that it be placed so that it covers 60% or more of the waist edge and the edge of the portion covering the inner sides of the legs, and more preferably, it covers the entire waist edge and the edge of the portion covering the inner sides of the legs.

At the same time, in the second embodiment, as shown in FIG. 15A, it is preferable that it is located at least at the left and right edges of the portion 304 covering the inside of the legs (in this example, at the edges 370a and 370b of the main part 370 of the diaper). In this case, shown in FIG. 15A, it is preferable that it be positioned to cover 60% or more of the total length of the diaper body 370 (distance between waist edges 370c and 370d).

The surface density of the sheet forming the cells is preferably from 10 to 50 g / m ² . At values less than 10 g / m ^{2, the} sheet will not have sufficient bulk and the adhesive used to attach the stretchable material may penetrate the sheet and leak out, or other defects may occur. At the same time, at values exceeding 50 g / m ^2: 1) the sheet may be too stiff, which makes it less capable of bending together with the stretching material being pulled together and complicates the formation of a cellular structure; or 2) the sheet may be too bulky, which makes the stretch part stiff and impairs wear, etc.

The cell-forming sheet 282 shown in FIG. 12B and FIG. 12C, the cell-forming sheet 382 shown in FIG. 13A and FIG. 13B and the cell-forming sheet 382 shown in FIG. 18B are formed from components independent of the others components. However, there is no requirement that the sheet forming the cells must be formed from independent components. For example, in the disposable diaper 1A shown in FIG. 1D, the folded portion 88 is formed by folding the back of the outer sheet 66 forming an elastic nonwoven fabric (stretch portion 80), and this folded portion 88 is used as the cell forming sheet 82. Similarly, in the disposable diaper 201A shown in FIG. 12C, the folded portion is formed by folding the back of the nonwoven sheet 32 forming the three-dimensional assemblies 26, and a configuration in which the folded portion is used as the cell forming sheet can be selected. .

In the disposable diaper 301C of FIG. 17C, for example, the folded portion is formed by folding the back of the nonwoven fabric sheet 334 forming the elastic nonwoven fabric (stretch portion 381), and this folded portion is used as the cell forming sheet 383.

In addition, in the disposable diaper 301D shown in FIG. 18A, a portion of the nonwoven fabric sheet 333 forming three-dimensional assemblies 327 is used as the cell forming sheet 383. In the disposable diaper 301E shown in FIG. 18B, a portion of the nonwoven fabric sheet 333 forming three-dimensional assemblies 326 and 327 is also used as the cell forming sheet 383.

In the disposable diaper 301D shown in FIG. 18A and the disposable diaper 301E shown in FIG. 18B, the folded portions 378, 379, 378 and 379 are formed in sheets of nonwoven fabric 333 and 333, and the folded portions 378, 379, 378 and 379 are also used as sheets of nonwoven material forming the stretch portions 381 and 381.

In the disposable diaper 201A shown in FIGS. 12B and 12C, the cell forming sheet 282 is located on the inner surface of the three-dimensional assemblies 26. When using the disposable diaper 201A, as shown in FIG. 12F, the three-dimensional assemblies 26 come into contact with the user's skin, as if they had “fallen out”. As a result, the cell-forming sheet 282, which is located on the inner surface of the three-dimensional assemblies 26, comes into contact with the skin of the user, demonstrating the advantages of the present invention. The dash-dot line in FIG. 12F shows the buttocks of the user.

The sheet forming the cell may have a perforation hole formed by joining together the inner space of the diaper and the cells formed by the sheet forming the cell. In both the first and second embodiments, this structure allows moisture to pass into the cells from the inside of the diaper through the perforation hole, which makes it more difficult to condense moisture on the surface of the diaper in contact with the skin. In addition, in the second embodiment, moisture passes into the cells from the inner space of the diaper through the perforation hole and is released into the space external to the diaper through the cells.

A “perforation hole” is a hole that connects the interior of the diaper and the cell, while there are no particular limitations with respect to the embodiment. It can be, for example, round, elliptical, polygonal (triangular, square, etc.).

A “perforation hole” need not always remain open and may have a structure that opens and closes. For example, by forming a notch with a convex path or multiple intersecting notches in the sheet forming the cells, it is possible to create a perforation hole with a tongue that serves as a valve. Using the tongue prevents the entry of urine and body fluids into the cells, but makes it possible for moisture to pass through them.

There are no particular restrictions with respect to the embodiment of the slots. A “slot with a convex path” may be a) a slot with a curved part (a slot with the shape of an inverted letter U, etc.) or b) a slot with a knee-shaped bend (a slot with the shape of an inverted letter V), etc. In addition, “multiple intersecting slots” may be c) two slots that intersect to form a cross-shaped slot, or d) slots that intersect to form a star-shaped slot, etc.

A perforation hole is preferably formed in that area of the sheet forming the cells in which the cells are formed (in other words, in the area between the joints). In particular, in cases like the one-time diaper 1A shown in FIG. 1D, in which the sheet forming sheet 82 is formed from the folded portion 88, or the one-time diaper 301C shown in FIG. 17C, in which the sheet 383 forming cell formed from the folded portion of the nonwoven sheet 334, it is preferable that the perforation hole is formed in the area on the side of the edge of the folded portion and that the stretch portion is attached to the folded portion closer to the edge of the folded portion than Genot perforation. With this type of embodiment, it is preferable that the perforation hole is forcibly opened by tightening the stretch portion.

In the aforementioned configuration, the forced opening of the perforation hole becomes an edge hole for the cells. As a result, moisture from the inner space of the diaper passes into the cells from the forced open perforation hole, passes through the cells, passes through the sheet forming the cells on the fold line (in the example in fig.1D these are the waist edges 62c and 65c, and in the example in fig. 17C is the upper edge of the three-dimensional assemblies 327), and stands out in a space external to the diaper. Compared with the simple formation of a perforation hole in the sheet forming the cells, this configuration facilitates the passage of moisture into the cells and its release to the outer part of the diaper, and is therefore preferred.

In addition, numerous perforations may be formed in the sheet forming the cells. The formation of numerous perforation holes provides increased breathability and promotes the release of moisture into the outer part of the diaper.

There are no particular restrictions on the amount indicated by the term "plural". The amount will vary depending on the area of the open perforation. With an open hole area of 0.5 to 10 mm ² , it is preferable to form 5 to 200 perforations and more preferably 10 to 100 perforations. Increased air permeability can be achieved with five or more perforations. At the same time, with 200 or less, there is the possibility of effectively preventing the passage of urine and body fluids into the cells.

Another preferred embodiment is an embodiment in which the sheet forming the sheet is coated with a pharmaceutical preparation. Coating it with a pharmaceutical preparation enhances the pharmaceutical benefits of the preparation in question related to the sheet forming the cell, which comes in direct contact with the skin of the user.

There are no particular restrictions on the type of pharmaceutical product to be used. Examples of products that can be used include moisturizers (aloe extract, propylene glycol, etc.), skin care supplements that inhibit urease activity (eucalyptus extract, etc.), as well as antiseptics, antibacterial drugs ( ethylenediaminetetraacetic acid (EDTA), benzalkonium chloride, etc.) and deodorants (various polyphenolic compounds, etc.).

[2-5] Cells:

The disposable diaper of the present invention has, as shown in FIG. 1D, FIG. 1F, FIG. 15D and FIG. 15F, connections 84 and 384 that connect the sheets 82 and 382 forming cells with stretch portions 80 and 380. Connections 84 and 384 intermittently connect the cell sheets 82 and 382 to the stretch portions 80 and 380 in the direction in which the stretch portion is pulled together. As a result of the presence of joints 84 and 384, cells 86 and 386 are formed with predetermined boundaries and are formed in a direction that intersects the direction of drawing together of the stretching parts 80 and 380, between the layers formed by sheets 82 and 382 forming the cells, and the stretching parts 80 and 380.

In the aforementioned configuration, the distance between the joints 84 and 384 connecting the sheets 82 and 382 forming the cells with the stretching parts 80 and 380 decreases when the stretching parts 80 and 380 are pulled together, which causes the formation of cells 86 and 386. These cells 86 and 386 provide an increase breathability and flexibility of the diaper. In addition, the use of the aforementioned configuration means that there is no need to use the exact joining technology that is required for absorbent articles in the form of underpants and described in patent documents 1-5 for joining sheets according to the location of the stretch material. As a result, the manufacture of this product is simple.

To guarantee the formation of cells, it is preferable that the sheet forming the cells is attached in a free state to the elastic non-woven material in a natural state (in a state in which there is no expanding force applied to the stretched part). In other words, a configuration is preferred in which the distance between the compounds in the natural state is greater in the sheet forming the cell than in the elastic non-woven material. Using this design makes it difficult for the sheet forming the cell to prevent stretching of the stretch portion. This design also guarantees the formation of cells in a natural state.

The above configuration can be formed, for example, by using the following method. An elastic non-woven material, which is a non-woven material, which in itself is elastic, has its original size, being in a natural state (in the absence of any expanding force applied to it). As a result, when a stretch portion is formed from an elastic non-woven material, it will be preferable to connect the sheet forming the cells with an elastic non-woven material stretched to a size exceeding its original dimensions.

At the same time, an elastic non-woven material containing stretch material in its stretched state, placed between several layers formed by sheets of non-woven material, in its natural state has dimensions smaller than its original size. As a result, when the stretch portion is formed from the elastic nonwoven fabric, it is preferable to stretch the elastic nonwoven fabric from its constricted state before attaching it to the cell forming sheet.

In addition, when the stretch portion is formed from an elastic nonwoven fabric containing stretch material in its stretched state, placed between the multiple layers formed by the nonwoven fabric sheets, the cells are pre-formed by overlapping the nonwoven fabric sheet and the sheet forming the cells that represent are materials that form an elastic non-woven material, and connecting them together. It is preferable to subsequently form an elastic nonwoven material by placing the stretchable material in an expanded state between the layers formed by the nonwoven fabric sheet to which the sheet forming sheet is attached and the other nonwoven fabric sheet, and bonding them together.

In this method, a sheet forming a cell is attached to a sheet of nonwoven material that does not create any pulling force. As a result, it will be easier to attach the sheet forming the cell than in cases in which an elastic nonwoven fabric is attached to the sheet forming the cell. At the same time, when attaching the elastic non-woven material to the sheet forming the cells, it is necessary to connect with the elastic non-woven material in its stretched state. As a result, a situation may arise when it will be impossible to attach the sheet forming the cells in a predetermined manner, while the sheet forming the cells may become wrinkled / folded, or the technological process of joining the two components may require complex machinery.

The connection of the stretchable part with the sheet forming the cell for forming the stretchable part is performed by attaching the front surface of the elastic nonwoven material to the sheet forming the cell. In other words, the stretch material and the elastic film laid inside the sheet / between the sheets of nonwoven fabric are not attached directly to the sheet forming the cells.

The connection between the elastic non-woven material and the sheet forming the cell can be formed by using adhesive bonding due to adhesive, heat or ultrasound, etc. for fastening joints. Highly fluid adhesives, such as hot-melt adhesive, can be used as an adhesive. Adhesive bonding methods may include heat sealing, etc.

“Intermittently” means that the compounds form either not continuously or intermittently. In this connected state, the stretch portion and the sheet forming the cells become a single component that cannot be separated at the joints. At the same time, in the unconnected parts, the stretch part and the sheet forming the cells do not hold each other and can be freely separated. “Discontinuity” may indicate discontinuous intervals in the direction of contraction of the stretch portion.

[2-5A] The cellular structure in the first embodiment:

In the first embodiment, as shown in FIG. 1D and FIG. 1F, the cells 86 are impervious, while they are open at one edge and closed at the other. Since cells 86 are open at one end and closed at the other, body excretions cannot flow out through the interior of cells 86.

In the first embodiment, there is no particular limitation with respect to the embodiment of the joints, provided that it is possible to form impermeable cells open at one edge and closed at the other, which extend in a direction crossing the direction of contraction of the stretch part. However, the formation of cells that continue in a direction crossing the direction of contraction of the stretch part requires the formation of intermittent joints in the direction of contraction of the stretch part.

Examples of this type of embodiment include, for example, compounds 84 shown in FIG. 1F and FIG. 2A, compounds 84D shown in FIG. 7A, compounds 84E shown in FIG. 8A, and compounds 84F shown in FIG. 9A on which a zigzag shape for making joints is provided with continuity in the drawing direction of the stretch portion 80. Alternatively, the connection form can be wave-shaped in order to ensure continuity in the drawing direction of the stretching part 80, as proved in the case of compounds 84A shown in Figure 4A, compounds 84B, depicted in Figure 5A and compounds 84C depicted in Figure 6A.

In the first embodiment, the preferred gap between the joints at the edge of the cell opening is from 2 to 50 mm, with a gap of 5 to 10 mm being particularly preferred.

In the disposable diaper 1A shown in FIG. 1D, the folded portions 88 of the outer sheets 63 and 66, which form the cell forming sheet 82, are attached (joints 84) to the holding sheet 68, which provides the formation of the stretching portion 80 (elastic non-woven fabric) . FIG. 2A shows a typical schematic plan view showing an enlarged view of an embodiment of compounds 84 in the disposable diaper 1A shown in FIG. 1B.

As shown in FIG. 2A, joints 84 are formed with a zigzag pattern in the direction of the torso of the diaper (from left to right in the schematic image). In other words, joints 84 are formed intermittently in the constriction direction of the stretch portion 80 (from left to right in the schematic diagram). All cells 86 are formed with a triangular shape, if you look at them in a plan view.

In addition, the cells consist of cells 86 open at the edge closest to the space external to the diaper (at the edge corresponding to the waist edge 65c) and closed at the edge farthest from the space external to the diaper (this cells facing outward), as shown in FIG. 2A and FIG. 2C, and cells 86 open at the edge farthest from the space external to the diaper and closed at the edge closest to the space external to the diaper (these are cells facing inward) as shown in figa and figv.

In addition, in the examples shown in FIGS. 2A to 2C, multiple cells 86 are formed as rows of cells arranged in parallel in the constriction direction of the stretch portion 80. As a result, moisture, etc. will tend to go towards the front and back of the diaper, which helps to remove moisture from the inside of the diaper. In addition, it will be easy to ensure that the diaper adheres to the curved surface of the user's waist, and the diaper will have excellent fit and wear.

In addition, these rows of cells are arranged so that outward facing cells and inward facing cells alternate with each other. In this type of embodiment, outward facing cells “absorb” air from a space external to the diaper, while inward facing cells absorb moisture from the inner space of the diaper. As a result, the outwardly facing cells and the inwardly facing cells interchange air and moisture and contribute to the removal of moisture. As shown in the example of FIG. 2A, alternating outwardly facing cells and inwardly facing cells are formed with defined boundaries and are formed by joints 84 made in a zigzag pattern.

Compounds 84 shown in FIG. 2A are formed as a continuous line. However, they can also be formed as a set of compounds in the form of points. This type of embodiment is preferred because it means that compounds that can become hard to touch are less likely to cause pain if they touch the skin. To ensure that multiple point-type compounds will indeed constitute a “population”, it is required that the spacing between adjacent point-type compounds is a maximum of 5 mm. An example of the formation of a point-type compound is a circular arrangement, etc.

The embodiments shown in FIGS. 3A and 3B are similar to the embodiments shown in FIGS. 2A to 2C, in that 1) multiple cells 86 are formed into rows of cells through connections 84, with these rows being arranged in parallel in the direction of contraction of the stretch portion 80, and 2) the outwardly facing cells and the inwardly facing cells are arranged alternating in rows of cells. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 2A to 2C. At the same time, the embodiments shown in FIGS. 3A and 3B are different from the embodiments shown in FIGS. 2A to 2C in that they have a slot 89 formed in the area adjacent to the waist edge 65c of the sheet 82 forming cells. The formation of a slot 89 makes it possible for the opening of the outwardly facing cells to be open in the direction of the waist edge 65c, which provides increased breathability and improved moisture removal.

The embodiments of FIGS. 4A to 4C are similar to the embodiments of FIGS. 2A to 2C in that they use a non-woven fabric sheet 69 as the cell forming sheet 82A, and also that 1) multiple cells 86A are formed as rows of cells through joints 84A, wherein these rows are parallel in the direction of contraction of the stretch portion 80, and 2) the rows of cells comprise outwardly facing cells and inwardly facing cells arranged alternately. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 2A to 2C. However, in the embodiments shown in FIGS. 4A to 4C, the joints 84A are formed in a wave-like shape, with the direction of the body being the diaper.

The embodiments shown in FIGS. 5A and 5B are similar to the embodiments in FIGS. 2A to 2C in that they use a nonwoven sheet 69 as the cell forming sheet 82A, and also that 1 ) multiple cells 86B are formed into rows of cells by means of joints 84B, with these rows parallel to the pull direction of the stretch portion 80. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 2A to 2C.

However, the embodiments shown in FIGS. 5A and 5B are different from the embodiments shown in FIGS. 2A to 2C in that they have multiple “tiers” (in this example, two tiers) of rows of cells located in a direction crossing the direction of contraction of the stretch portion 80. In addition, the rows of cells located near the waist edge 65c (rows of cells in the upper part of the schematic image) are outward facing cells located in parallel, while the rows of cells more distant from n clear edge 65c (series of cells arranged below the schematic illustration) are converted into cells arranged in parallel. Since in this type of embodiment, the rows of cells are divided into a larger number of tiers compared to the embodiments shown in FIGS. 2A to 2C, the cells will be more prone to deformation by user movements. In other words, this embodiment is preferred because it provides a high degree of flexibility and fit. The embodiments shown in FIGS. 5A and 5B have connections 84B that are made with a continuous U shape with a wave shape in the direction of the body.

The embodiments shown in FIGS. 6A to 6C are similar to the embodiments shown in FIGS. 5A and 5B in that the folded portion 88 of the outer sheet 66 is used as the cell forming sheet 82B and the sheet 67 of the nonwoven material is used as the sheet 82C forming the cells, and in that 1) they have numerous tiers (in this example, two tiers) of rows of cells located in the direction crossing the direction of drawing of the stretch portion 80, and 2) they have joints 84C, which are made with continuous f rmoy letters U, c undulating form in the direction of the trunk. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 5A to 5B. However, in the embodiments shown in FIGS. 6A to 6C, all rows of cells contain inwardly facing cells located in parallel.

In addition, in the embodiments shown in FIGS. 6A - 6C, multiple rows of cells are arranged such that a portion of the connections 84C that define the boundaries of the cells 86C and form cells 86C as one row of cells (a series of cells on the base side of the schematic ), continuing in the direction (vertically in the schematic image), crossing the direction of contraction of the stretching part 80 (the direction from left to right in the schematic image), and part of the connections 84C, which define the boundaries of the cells 86C and form the cells Girls 86C in the form of one row of cells (a row of cells in the upper part of the schematic image) adjacent to the aforementioned row of cells, continuing in the direction of intersection, are not located on the same straight line.

In other words, the numerous rows of cells are arranged so that a line extending from the portion of the connections 84C that define the boundaries of the cells 86C and form the cells 86C in the form of one row of cells (a series of cells from the base side of the schematic image), continuing in the direction of intersection (vertically in the schematic image), passes through cells 86C in a row of cells adjacent to the aforementioned row of cells.

When cells 86C “bulge” as a result of constriction of the stretch portion 80, joints 84C form concave zones, and it is possible that body excretions can flow out of these concave zones. However, in the embodiments shown in FIGS. 6A to 6C, the position of the joints 84C is offset so that the concave zones of the rows of cells formed as a plurality of tiers are not continuous. This has the advantage that it will be difficult to leak body excretions through concave zones. In addition, since the row of cells in the upper part of the schematic image includes inwardly facing cells located in parallel, body excretions transported by means of 84C connections in a number of cells from the base side of the schematic image are trapped inwardly in the upper row of cells in the schematic image, which gives the diaper excellent tightness.

The embodiments of FIGS. 7A to FIG. 7C are similar to the embodiments of FIGS. 2A to 2C in that they use a nonwoven sheet 67 as a sheet forming a cell 82C, and also that 1) the connection 84D formed with a zigzag pattern with a direction in the direction of the trunk of the diaper (in the direction from left to right in the schematic image); 2) the multiple cells 86D are formed in the form of rows of cells arranged in parallel in the direction of contraction of the stretch portion 80, and 3) the rows of cells comprise outwardly facing cells and inwardly facing cells arranged alternately. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 2A to 2C.

In addition, the embodiments of FIGS. 7A to 7C are also similar to the embodiments of FIGS. 5A and 5B in that they have multiple tiers (in this example, two tiers) of rows of cells located in a direction intersecting the contraction direction stretchable portion 80. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 5A to 5B.

In addition, in the embodiments shown in FIGS. 7A to 7C, two independent sheets 82C are provided to form cells that correspond to each row of cells. In other words, the folded portion 88 of the outer sheet 66 is not used as the sheet forming the cell. Independent cell-forming sheets 82C mean that all cells 86D will open in the direction of the interior of the diaper in the direction of the waistband 65C.

The embodiments shown in FIGS. 8A to 8C are similar to the embodiments in FIGS. 7A to 7C in that they use a nonwoven sheet 67 as a sheet forming a cell 82C, and also that 1 ) connections 84E are formed with a zigzag pattern with a direction in the direction of the trunk of the diaper (in the direction from left to right in the schematic image); 2) numerous cells 86E are formed in the form of rows of cells located parallel in the direction of contraction of the stretch portion 80, 3) the rows of cells contain outward facing cells and inward facing cells arranged alternately; 4) they have numerous tiers (in this example, two tiers) of rows of cells located in a direction that intersects the drawing direction of the stretch portion 80, and 5) a sheet 82A and 82B is provided to form cells corresponding to each row of cells. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 7A to 7C.

However, in the embodiments shown in FIGS. 8A to 8C, multiple rows of cells are arranged such that a portion of connections 84E that define the boundaries of cells 86E and form cells 86E as one row of cells (a series of cells on the base side of the schematic image), extending in the direction (vertically in the schematic image) crossing the direction of contraction of the stretch portion 80 (left to right direction in the schematic image), and part of the joints 84E that define the boundaries of the cells 86C and form the cells 86C in the form of one row of cells (a row of cells at the top of the schematic image) adjacent to the aforementioned row of cells extending in the direction of intersection, are not located on the same straight line.

In other words, numerous rows of cells are arranged so that a line extending from a portion of the connections 84E that define the boundaries of the cells 86E and form cells 86E in the form of one row of cells (a series of cells from the base side of the schematic image), continuing in the direction of intersection (vertically in the schematic image), passes through cells 86E in a row of cells adjacent to the aforementioned row of cells. As a result, the advantages of these embodiments are the same as those of the embodiments shown in FIGS. 6A to 6C.

The embodiment shown in FIG. 9 is similar to the embodiments in FIGS. 8A to 8C, with the number of tiers of the rows of cells being increased from two to three tiers. In this embodiment, three independent nonwoven sheets 71 are used as the sheet 82D forming a cell corresponding to each of the rows of cells. In addition, multiple cells 86F are formed by joints 84F formed in a zigzag pattern with a direction in the direction of the body of the diaper (from left to right in the schematic image). This embodiment has the same advantages as the embodiments of FIGS. 8A to 8C. An increase in the number of rows of cells to three tiers gives it additionally increased flexibility and improved fit compared to the embodiments of FIGS. 8A to 8C.

The embodiments shown in FIGS. 10A and 10B are similar to the embodiments in FIGS. 8A to 8C, except that the options for forming cell sheets 82E and 82F are different. In the embodiments of FIGS. 10A and 10B, non-woven sheets 73 and 75 are used as the cell sheets 82E and 82F, and the edge of the cell openings has a multilayer structure. Through the use of this multilayer structure, it is possible to strengthen the base of the sheets 82E and 82F forming the cells. As a result, even if the cells 86E are squeezed under the pressure of the means, the openings of the cells will not tend to flatten, and the cells 86E are relatively easily kept open.

In addition, in the embodiments of FIGS. 10A and 10B, the unopened edge of the cells in the cell sheets 82E and 82F also has a multilayer structure. This type of structure makes it difficult to “lift” the sheets 82E and 82F forming the cells from the unopened edge of the cells, which helps to keep the cells 86E in the open state.

There are no particular restrictions on the method used to form the multilayer edge of the cell openings. The edge of the cell forming sheet 82E can be folded down to form a multilayer structure similar to that shown in FIG. 10A, or the edge of the cell forming sheet 82F can be folded up to form a multilayer structure similar to that shown in FIG. 10B. In addition, the sheet forming the cells can be attached to a separate sheet to form a multilayer structure.

[2-5B] The cellular structure in the second embodiment:

In the second embodiment, as shown in FIG. 15D and FIG. 15E, the joints are formed 384 so that they intermittently connect the cell forming sheet 382 and the stretch portion 380 aligned from the user edge of the portion covering the inside of the legs, and by of the connections 384, the cells 386 are formed with defined boundaries and are formed between the sheet 382 forming the cells and the stretch part 380, and extend so that they cross the edge of the part covering the inner sides of the legs.

In the aforementioned configuration, the distance between the joints 384 in the cell forming sheet 382 decreases when the stretch portion 380 is pulled together, which leads to the formation of cells 386 at the edge of the portion covering the inside of the legs, while these cells 386 connect the inside of the diaper to the outside attitude towards him. These cells 386 provide increased breathability and flexibility of the diaper. In addition, the use of the aforementioned configuration means that there is no need to use the exact joining technology that is required for absorbent articles in the form of underpants and described in patent documents 1-5 for joining sheets according to the location of the stretch material. As a result, the manufacture of this product is simple.

In the present invention, cells are formed by decreasing the interval between one connection and the remaining connections on the sheet forming the cell and the stretch portion. As a result, the preferred value of the interval between the joints is from 2 to 50 mm in the direction corresponding to the direction of the edge of the part covering the inner sides of the legs, and more preferably if this value is from 5 to 10 mm.

There are no particular restrictions on the shape with which the joints should be formed in the direction crossing the direction of contraction of the stretchable part. However, it is preferred that the joints are formed as continuous in a direction crossing the direction of drawing of the stretch portion. An embodiment of this type makes it possible to form effective cells facing in a direction crossing the direction of contraction, which are more comfortable when they touch the skin. An example of this is joints formed as continuous in the direction crossing the direction of contraction of the stretchable part, with discontinuous regular intervals in the direction of contraction of the stretchable part, etc.

In the disposable diaper 301B shown in FIG. 15B, the cell forming sheet 382 is attached (via joints 384) to the nonwoven sheet 332 (side sheet 319) forming the stretch portion 380 (elastic nonwoven fabric). FIG. 15F shows a typical plan view of an enlarged image of an embodiment of connections 384 in the disposable diaper 301B of FIGS. 15A and 15B, and shows a typical plan view of a state in which the sheet forming sheet 382 is separated from the diaper 301B single use.

As shown in FIG. 15F, joints 384 include multiple linear joints 390 directed towards the body of the diaper (left to right in the schematic diagram). These linear connections 390 are formed intermittently along the line of the edge of the portion covering the inner sides of the legs (edges 370a of the diaper body 370). In addition, each of the linear connections 390 is formed by a combination of several point-type connections 392 located on one line in the direction of the body of the diaper.

As shown in FIG. 15F, the linear connections 390 are positioned so that they face toward the body of the diaper. As a result, moisture, etc. it will be easier to flow in the forward and backward directions compared to cases in which the joints are located in the direction corresponding to the direction of the edge of the part covering the inner sides of the legs, which helps to accelerate the removal of moisture, etc. from the marginal zone of the part covering the inner sides of the legs (edges 370a of the main part of the diaper). In addition, it is easy to ensure that the shape of the diaper matches the curvilinear shape of the user's legs, while providing excellent fit and wear.

In this description, the term "linear" is used in a broad sense and encompasses a configuration that extends in a direction corresponding to the direction of the trunk of the diaper, and can cover both linear and ribbon-like or strip-like configurations. In addition, in order to guarantee that the plurality of point-type compounds will indeed constitute a “population”, it is required that the distance between adjacent point-type compounds is a maximum of 5 mm.

In addition, the embodiment shown in FIG. 16A has the same configuration of the stretch portion as the configuration in FIG. 15F, but with the formation of compounds differently. Compounds 384A include numerous linear connections 390A, facing the body of the diaper. In addition, the linear connections 390A are formed intermittently along the edge of the part covering the inner sides of the legs (edges 370a of the main diaper part). In addition, the linear compounds 390A are formed as a combination of point-type compounds 392A having a circular shape. As a result, in addition to the advantages achieved by the embodiment shown in FIG. 15F, compounds 384A, which may become hard to touch, are less likely to cause pain if they touch the skin.

In addition, the embodiment shown in FIG. 16B has the same configuration of the stretch portion as the configuration in FIG. 15F, but with the formation of the compounds differently. Compounds 384B include numerous linear connections 390B facing the body of the diaper. In addition, the linear connections 390B are formed intermittently along the edge of the part covering the inner sides of the legs (edges 370a of the main part of the diaper).

In addition, each of the 390B linear connections is formed in the form of a collection in which n rows of numerous point-type connections 392B are directed towards the body of the diaper, and m “columns” are aligned from the usable part covering the inside of the legs (edges 370a of the diaper’s main part ), while they are arranged in the form of a matrix that corresponds to the expression n <m. The implementation of this embodiment in accordance with the condition n <m ensures that in each of the linear connections 390B in the direction of the trunk there will be a larger number of connections 39B2 of point type in comparison with the number of connections aligned in the direction of the edge of the part covering the inner sides of the legs, however, in the direction of the trunk, lines of greater length will be formed than in the direction corresponding to the direction of the edge of the part covering the inner sides of the legs.

In the example shown in FIG. 16B, the linear connections 390B are formed as a plurality of point-type connections 392B having a circular shape, and the point-type connections 392B are arranged and form a set in a matrix of two rows / rows and five columns.

In embodiments similar to those described above, it is preferable to form linear compounds with a size of from 1 to 4 mm (w - in width) and from 2 to 80 mm (l - in length), with the number of dots in the length direction of 1 to 30 Each linear connection should preferably contain point type compounds with a surface area of 1 to 4 mm ² each with a distance between them of 0.5 to 5 mm, in a matrix spaced a distance of 0.5 to 3 mm in the length direction.

Figa and figv describe an example in which linear compounds are formed as a combination of point type compounds. However, as shown in FIG. 16C, it is also preferable to have joints 384 formed intermittently along the edge of the part covering the inside of the legs (edge 370 of the main part of the diaper), as well as continuously in the direction of the trunk of the diaper (linear connections 390C). The embodiment shown in FIG. 16C also has the same configuration of the tensile portion as the configuration shown in FIG. 15F, despite the formation of compounds differently.

In addition, in the embodiment with joints 384C, the joints are formed so that they cross the line of the edge of the part covering the inner sides of the legs (edges 370a of the main part of the diaper), and the cells are aligned so that they cross the edge of the part covering the inner sides of the legs. In this embodiment, the cells connect the inside of the diaper to the outside at the edge of the part covering the inside of the legs. This makes it possible to provide adequate ventilation.

In this embodiment, the joints are formed in the form of lines extending in the direction of the trunk of the diaper. This is preferable because as a result, it helps to remove moisture, etc. from the marginal zone of the part covering the inner sides of the legs (edges 370a of the main part of the diaper). Therefore, based on the same basic approach, for cases in which multiple joints are formed in the direction of the diaper's body, it is preferable to form them in the form of one line so that they are facing in the direction of the diaper's body in a straight line lines (embodiments shown in FIG. 16A and FIG. 16B). The formation of compounds thus contributes to the formation of cells in a continuous straight line in the direction of the trunk of the diaper. Cells formed using this configuration are not easy to flatten, and they are preferred because they contribute to increased permeability.

In the disposable diaper of the present invention, it is preferable if the sheet forming the cell and the stretch part are joined together by means of intermittent joints both in the direction of the body of the diaper and in the direction corresponding to the direction of the edge of the part covering the inside of the legs.

For example, numerous point-type compounds can be arranged with a checker pattern. In this embodiment, the cell-forming sheet will also bend when the stretch portion is pulled together, causing the formation of cells that connect the inner space of the diaper and the space external to the diaper. As a result, it is possible to provide breathability and flexibility at the edge of the part covering the inside of the legs, which is an advantage of the present invention.

[2-6] Places of use:

There are no particular restrictions on the location of the formed mesh structure in the first embodiment. In the second embodiment, the cellular structure is formed at least on the left and right edges of the part covering the inner sides of the legs. This can be applied, for example, in the following places.

[2-6A] Location area of the stretch material for the waist:

The location zone of the stretch material for the waist has a structure of elastic non-woven material, and the stretch material for the waist is fixed in its stretched state between the layers formed by the sheet of non-woven material. In addition, the stretch material for the waist is usually located at the waist edge or the front cover portion or the rear cover portion. As a result, the intermittent attachment of the sheet forming the cell at the location of the stretch material for the waist allows a cellular structure to form on the stretch material for the waist.

The disposable diaper 1A shown, for example, in FIG. 1B and FIG. 1D, is configured with an elastic nonwoven fabric (stretch portion 80), in which the stretch material 42 for the waist is fixed in its stretched state between the layers formed the folded portion 88 of the outer sheets 63 and 66 and the holding sheet 68. In other words, the stretch portion 80 is formed in an area close to the waist edge of the front cover portion 2 or the rear cover portion 6 (in this example, to the waist edge 62 the outer material 62 of the front or the waist edge 65c of the outer material 65 of the rear). In addition, the cell-forming sheet 82 is attached to this stretch portion 80 (compound 84).

[2-6B] Location area of the stretch material for the legs:

The location zone of the stretch material for the legs has the structure of an elastic nonwoven material, wherein the stretch material for the legs is fixed in its stretched state between the layers formed by the sheet of nonwoven material. In addition, the stretch material for the legs is usually placed aligning it with the user edge of the part covering the inner sides of the legs. As a result, the attachment of the sheet forming the cells at the location of the stretch material for the legs allows the formation of a cellular structure on the stretch material for the legs.

For example, the disposable diaper 301A shown in FIG. 13B is configured to provide an elastic nonwoven fabric (stretch portion 380) in which the stretch material 340 for legs is fixed in its stretched state between the layers formed by the side sheet 319 and the cover by sheet 324. In other words, the stretch portion 380 is formed in the area between the fixed edge (lower edge) of the three-dimensional assemblies 326 and the edge of the portion 304 covering the inner sides of the legs (in this example, the edges 370a and 370b of the main ovine 370 diaper). In addition, the cell forming sheet 382 is attached to this stretch portion 380 (joints 384).

In addition, the disposable diaper 301B shown in FIG. 15B is configured to provide an elastic non-woven fabric (stretch portion 380) in which the stretch material 340 for legs is fixed in its stretched state between the layers formed by the side sheet 319 and cover sheet 324. In other words, the stretch portion 380 is formed in the area between the fixed edge (lower edge) of the three-dimensional assemblies 326 and the edge of the portion 304 covering the inside of the legs (in this example, these are edges 370a and 370b about main part of the diaper 370). In addition, in this example, the cell forming sheet 382 is intermittently attached to this stretch portion 380 (joints 384). All connections 384 shown in FIG. 17C, FIG. 18A and FIG. 18B represent the same embodiment.

In addition, the disposable diaper 1B shown in FIG. 19C is configured to provide an elastic nonwoven fabric (stretch portion 80), in which the stretch material 38 for the legs is fixed in its stretched state between the layers formed by the nonwoven fabric sheet 32 . In other words, the stretch portion 80 is formed in the region between the fixed edge (lower edge) of the three-dimensional assemblies 26 and the edge of the portion 4 covering the inside of the legs (edge of the absorbent means 14). In addition, in this example, the cell-forming sheet 82 is intermittently attached to this stretch portion 80 (joint 84).

[2-6C] Location zone of forming three-dimensional assemblies, stretchable material:

The location zone of the three-dimensional assemblies has the structure of an elastic non-woven material, wherein the stretch material forming the three-dimensional assemblies is fixed in its stretched state between the layers formed by the non-woven material sheet. In addition, the stretch material forming three-dimensional assemblies is usually formed with its alignment from the user edge of the part covering the inner sides of the legs. As a result, the intermittent attachment of the sheet forming the cell at the location of the stretch material forming the three-dimensional assemblies allows a cellular structure to be formed at the location of the stretch material forming the three-dimensional assemblies.

The disposable diaper 201A, shown, for example, in FIG. 12C, has three-dimensional assemblies 26 formed by a portion of the nonwoven sheet 32. In addition, it has the configuration of an elastic nonwoven fabric (stretch portion 280), in which the stretch material 36 forming three-dimensional assemblies is fixed in its stretched state between the layers formed by the main body of the nonwoven fabric sheet 32 and the folded body. In other words, the stretch portion 280 is formed in the region between the fixed edge (lower edge) and the free edge (upper edge) of the three-dimensional assemblies 26. In addition, this stretch portion 280 is attached to the cell sheet 282 (joints 284).

In addition, the disposable diaper 1B shown in FIG. 19C has three-dimensional assemblies 26 formed by a portion of the nonwoven sheet 32. In addition, it has the configuration of an elastic nonwoven fabric (stretchable portion 81) in which stretchable material 36 forming three-dimensional assemblies is fixed in its stretched state between the layers formed by the main part of the nonwoven sheet 32 and the folded part. In other words, the stretch portion 81 is formed in the region between the fixed edge (lower edge) and the free edge (upper edge) of the three-dimensional assemblies 26. In addition, in this example, this stretch portion 81 is attached to the cell sheet 82 (joints 84).

In addition, the disposable diaper 301C shown in FIG. 17C has three-dimensional assemblies 327 formed by a portion of the nonwoven fabric sheet 333. In addition, it has the configuration of an elastic nonwoven fabric (stretch portion 381), in which the stretch material 337 forming three-dimensional assemblies is fixed in its stretched state between the layers formed by the nonwoven fabric sheet 333 and the nonwoven fabric sheet 334. In other words, the stretch portion 381 is formed in the region between the fixed edge (lower edge) and the free edge (upper edge) of the three-dimensional assemblies 327. In addition, in this example, this stretch portion 381 is attached to the cell sheet 383 (joints 385). Compounds 385 depicted in FIG. 18A and FIG. 18B are the same embodiment as this.

In the disposable diaper 301C of FIG. 17C, the three-dimensional assemblies 327 are attached only to the cell forming sheet 383, and the three-dimensional assemblies 326 (the location zone of the stretch material 336 forming the three-dimensional assemblies) does not have a cell forming sheet attached to it. However, three-dimensional assemblies 326 (the location zone of the stretch material 336 forming three-dimensional assemblies) can be attached to the sheet forming the cells.

[2-7] A method of manufacturing a disposable diaper according to the first embodiment:

The following is a description of a method of manufacturing a disposable diaper according to the first embodiment.

The disposable diaper 1A shown in FIG. 1A to FIG. 1E can be manufactured using the processes shown in FIGS. 11A and 11B. 11A shows a typical manufacturing process for the disposable diaper 1A of FIGS. 1A to 1E. For reasons associated with the creation of a schematic image, a schematic image is shown showing only an enlarged image of the part that corresponds to the zone of the waist edge of the rear covering part of one panty-shaped diaper. FIG. 11B is a typical schematic end view of an outer contour showing an edge of a cross section made in the width direction in the center of the structural member shown in FIG. 11A in various process steps shown in FIG. 11A.

First, as shown in schematic representation (a) in FIGS. 11A and 11B, an outer sheet 66 is prepared which forms a cell forming sheet 82 and a holding sheet 68, which is a nonwoven sheet forming a stretch portion. The outer sheet 66 should be attached to the inner sheet 64 so that part of it (exposed to the impact part 78) was open for exposure in advance. This connection is performed by using hot-melt adhesive without glue.

Further, as shown in schematic representation (b) in FIGS. 11A and 11B, the folded portion 88 of the outer sheet 66 is attached to the holding sheet 68 to form the joints 84. At this stage, the connection should be made so that the holding sheet 68 does not protruded from the edge of the outer sheet 66. In a illustrative example, compounds 84 are formed by heat sealing. In addition, joints 84 form a continuous zigzag pattern in the direction of the trunk of the diaper (from left to right in the schematic image).

In addition, as shown in schematic representation (c) in FIGS. 11A and 11B, the stretch material 42 for the waist is placed in its stretched state on the exposed portion 78 of the outer sheet 66 and is attached thereto. At the same time, the absorbent element 14 is added. The exposed part 78 and the holding sheet 68, which compress the stretch material 42 for the waist, are fastened by means of a continuous surface.

The attachment of the stretch material 42 for the waist can be accomplished using any of the following methods of adhesive bonding: 1) the exposed portion 78 of the outer sheet 66 or the retaining sheet 68, which form the stretch portion 80, is continuously coated with a hot-melt solvent-free adhesive, and the area covered with adhesive placed over stretch material 42 for the waist in its stretched state; 2) the stretchable material 42 for the waist is either directly coated with a hot-melt solvent-free adhesive, or hot melt-free adhesive is sprayed onto it, and said stretch material 42 for the waist is attached in its stretched state; 3) the stretchable material 42 for the waist in its stretched state is placed on top of either the exposed part 78 or the retaining sheet 68, and in this state the hot-melt adhesive is sprayed onto it so that both components, which are either the open part 78 , or a holding sheet 68 and stretch material 42 for the waist, were coated with hot-melt adhesive without adhesive; 4) the stretchable material 42 for the waist is placed in its expanded state on the exposed part 78 or on the holding sheet 68, and the hot-melt adhesive without glue is either sprayed or applied continuously in this state so that both components, which are open or exposed part 78, or retaining sheet 68 and stretch material 42 for the waist, were coated with hot-melt adhesive without adhesive.

In these embodiments, the expression “applied continuously” is not limited to indicating that the adhesive / adhesive has been applied to the entire surface or sprayed to the entire surface, but may also indicate embodiments in which it is applied in a spiral, etc. In other words, it is sufficient if the embodiment demonstrates the formation of continuous joints in the direction of the trunk of the disposable diaper. If you select any of the methods 1) - 4) continuous connections will be formed in the direction of the trunk of the disposable diaper. As a result, in the front-to-rear direction of the disposable diaper, no continuous space will be formed between the exposed part 78 and the holding sheet 68, which form the stretch part 80. At the same time, the above-mentioned cells will be formed between the holding sheet 68 and the sheet 82, forming a cell (folded part 88), resulting in increased air permeability and flexibility.

Finally, as shown in diagrammatic view (d) in FIGS. 11A and 11B, the folded portion 88 of the outer sheet 66 and the holding sheet 68 attached to the outer sheet 66 are bent at a position corresponding to the waist edge 65c to overlap open to the impact of part 78 of the outer sheet 66. After that, the holding sheet 68 is attached by means of hot-melt adhesive without adhesive so as to cover part of the absorbent means 14 with the part of the holding sheet 68. When this is done, a stretching part 80 is formed containing stretch material 42 for the waist, located between the layers formed by the sheet / sheets of non-woven material.

Many of the technological operations described above can be performed continuously by mechanical means. The use of the method and equipment, which provides a continuous supply of elongated sheet material from the roller, makes it possible to continuously produce a large number of disposable diapers. Preferably, the elongated sheet material and the elongated stretch material are supplied from left to right, as shown, for example, in the schematic diagram, and that the illustrated configuration item is repeated many times from left to right in the schematic diagram for continuous production.

[2-8] A method of manufacturing a disposable diaper according to the second embodiment:

The disposable diaper of the second embodiment may be manufactured, for example, by means of a discontinuous attachment method, etc. the sheet forming the cell to the material forming the surface in contact with the skin in the part covering the inner sides of the legs. Other parts can be made by using the methods used in the manufacture of conventional disposable diapers. The following is a description based on the manufacture of the disposable diaper 301B shown in FIGS. 15A to 15E.

[2-8A] Joining the sheet forming the cell:

Three-dimensional assemblies 326 are formed by bending one edge of the non-woven fabric sheet 332 (edges on the side where the three-dimensional assemblies 326 are to be formed), placing the three-dimensional assemblies, stretchable material 336 in its stretched state between the main part of the material and the folded part and attaching it by hot-melt solvent-free glue. At the same time, the cell forming sheet 382 is attached to the other edge of the nonwoven fabric sheet 332 (to the edge on the side that will become the side sheet 319) to form the joints 384. In a illustrative example, the joints 384 are formed using heat sealing. In addition, joints 384 are formed intermittently in the direction of the torso of the diaper (from left to right in the schematic image) and intermittently in the front to back direction of the diaper (in the vertical direction in the schematic image).

[2-8B] Formation of a composite top sheet:

The front side flap 372 and the rear side flap 374 at the aforementioned edge of the nonwoven fabric sheet 332, to which the cell forming sheet 382 is connected to form intermittent joints, are bonded together by using hot-melt adhesive. The holding tape 311 is attached to the edge of the rear side flap 374 by heat sealing, etc. This configuration is called “composite top sheet”.

[2-8C] Formation of a composite back sheet:

The center-wide portion of the cover sheet 324 is attached to the back sheet 320 by using hot-melt adhesive, and the back sheet 320 is further attached to the waist stretch material 342 to form some configuration. This configuration is called the “composite back sheet."

[2-8D] Formation of a composite absorbent element:

The absorbent member 322 is covered with an upper thin fabric material and a lower thin fabric material (not illustrated). This configuration is called a “composite absorbent element." The location of the upper and lower thin fabric materials should be, for example, that of the absorbent element 22, the upper thin fabric material 54 and the lower thin fabric material 56 shown in figs and fig.19D.

[2-8E] Disposable diaper configuration:

The composite absorbent element is placed in the central width direction of the composite back sheet, and the leg stretch material 340 is placed in its expanded state at the width-defined edge of the composite back sheet. At this stage, a hot-melt solvent-free adhesive is applied to bond the composite absorbent member and the composite absorbent member.

The attachment of the stretch material 340 for the legs can be accomplished using any of the following methods of adhesive bonding: 1) hot-melt adhesive without adhesive is continuously applied to the back sheet 320, the covering sheet 324 or the side sheet 319, and the stretch material 340 for the legs is placed in its stretched state on the area on which the adhesive was applied; 2) hot melt adhesive is applied or sprayed directly onto the leg stretch material 340, and said leg stretch material 340 is attached in its stretched state; 3) the stretch material 340 for the legs in its stretched state is placed on top of the back sheet 320 and the cover sheet 324, and in this state, a hot-melt adhesive is sprayed onto it so that the hot-melt solvent-free adhesive adheres to all components representing the back sheet 320 covering sheet 324 and leg stretch material 340, and 4) leg stretch material 340 is placed in its stretched state on the surface of the back sheet 320 and the cover sheet 324, and the hot melt solventless glue is sprayed m continuous manner or applied in this state so that the hot-melt adhesive adheres to all components constituting the rear sheet 320, cover sheet 324 and the stretchable material 340 to the legs. Using these methods ensures that the back sheet 320, the covering sheet 324 and the side sheet 319, between which the stretch material 340 for the legs is located, are bonded as a continuous surface.

In these embodiments, the expression “applied continuously” is not limited to indicating that the adhesive / adhesive has been applied to the entire surface or sprayed to the entire surface, but may also indicate embodiments in which it is applied in a spiral, etc. When choosing any of the methods 1) - 4) continuous joints will be formed in accordance with the edge of the part covering the inner sides of the legs. As a result, in the direction of the body of the diaper, no continuous cells will be formed between the back sheet 320, the cover sheet 324 and the side sheet 319, which form the stretch part 380. At the same time, the above-mentioned cells will be formed located between the side sheet 319 and the sheet 382 forming the cell.

The composite top sheet is attached to the composite back sheet on which the composite absorbent member and the leg stretch material 340 are placed. As a result, the composite absorbent member and the stretch material 340 for the legs will be fixed between the layers formed by the composite top sheet and the composite back sheet. A disposable diaper 301B is made by this method.

In the first and second embodiments, the aforementioned method 1) of adhesive bonding can use a method such as crevice spraying, curtain spraying, spiral spraying, coating using Omega technology (developed by ITW Dynatec), etc., in the aforementioned method 2) adhesive bonding, a method such as a comb sprayer method, coating using Omega technology, coating using Sure Wrap technology, etc., and the aforementioned methods 3) and 4) of adhesive bonding, a method such as coating using Omega or Summit technology, etc. can be used. upon implementation. When using coatings using Omega technology, an Omega nozzle head (manufactured by ITW Dynatech) can be used, when using coatings using Summit technology, a Summit nozzle (manufactured by Nordson) can be used, and when using coatings using Sure Wrap technology, a Sure nozzle can be used. Wrap (manufactured by Nordson) for the implementation of the process.

[3] Materials for disposable diaper components:

The disposable diaper of the present invention should be configured with at least an absorbent member 22 and 322, both in the disposable diaper 1A shown in FIGS. 1C and FIG. 1D, and in the disposable diaper 301B shown in FIG. 15B. Usually, in addition to the absorbent element 22 and 322, the provided component materials include a top sheet 18 and 318 and a back sheet 20 and 320, etc. Depending on the purpose, other component materials may also be provided, such as three-dimensional assemblies and various types of stretch materials, etc.

[3-1] Absorbent element:

An “absorbent element” is a configuration comprising an absorbent material. It is used to absorb and retain urine, etc., exiting the user. Examples of absorbent materials include fluff pulp, high absorbency polymers (ultra high absorbency polymer; hereinafter referred to as “SAP”), hydrophilic sheet, etc. The preferred type of fluff pulp is wood or non-wood pulp pulverized to fluff pulp pulp, etc., while the preferred ultra-absorbent polymer is sodium polyacrylate and the preferred type of hydrophilic sheet is thin fabric, absorbent paper or non-woven material treated to give it hydrophilicity.

One or two or more types of absorbent material should preferably be used as a mat in an “absorbent element”. Mat can have one layer or many layers. A preferred material has from 10 to 500 parts by weight of ultra-high absorbency polymer in combination with 100 parts by weight of pulp pulp. At this stage, the ultra-absorbent polymer can be interfered with in a mat formed from fluff pulp, or it can be applied as a layer between several fluff pulp mats.

It is preferable to cover the entire absorbent element with a hydrophilic sheet in order to prevent the precipitation of the polymer with ultra-high absorbency and to ensure the stability of the form. As shown in FIGS. 1C and FIG. 1D, the absorbent member 22 is configured such that the entire absorbent member 22 is covered by the upper thin fabric material 54 and the lower thin fabric material 56, which are hydrophilic sheets. The absorbent member 322 shown in FIG. 13B and FIG. 15B also has the same configuration. In other words, the entire absorbent member 322 is covered by the upper thin fabric material and the lower thin fabric material (not illustrated).

The “absorbent element”, depending on its purpose, may be rectangular, may take the form of an hourglass or any other desired shape. The absorbent element 22 shown in FIG. 1C and FIG. 1D and the absorbent element 322 shown in FIG. 15B are, for example, rectangular absorbent elements. Typically, the “absorbent element” is closed on the surface side by the top sheet 18 and 318 and the back sheet 20 and 320, as shown by the absorbent element 22 shown in FIGS. 1C and FIG. 1D and the absorbent element 322 shown in FIG. 15B. In other words, the absorbent element 22 and 322 is usually located between the top sheet 18 and 318 and the back sheet 20 and 320.

[3-2] Top sheet:

The term “top sheet” refers to a sheet positioned so that it covers the surface of the absorbent element (a surface that faces the skin of the wearer when wearing the diaper). Because it is required that it allows the passage of urine, etc. from the user through it, at least part of the top sheet (all or part of the sheet) is formed from a liquid-permeable material.

The liquid-permeable material may be fabric, non-woven material, porous film, etc. Of these materials, non-woven materials containing polypropylene, polyethylene, polyester, aliphatic polyamide or other thermoplastic polymers processed to give them hydrophilicity are preferred.

Non-woven material that has been manufactured by methods including hot-blown carding, embossed carding, etc., is particularly suitable for use as a non-woven fabric. The hydrophilicity treatment may be performed by applying or spraying a surfactant onto the nonwoven fabric starting material or by soaking the material with a surfactant when immersed.

The top sheet is formed “at least partially” from a liquid permeable material. There are no special restrictions regarding the location of this zone. However, if we consider it in the form of a flat surface, it is preferable that the area overlapping the location of the absorbent element, in the part covering the inner sides of the legs, be formed from a liquid-permeable material.

In the disposable diaper of the present invention, there is no need for the entire surface on the side facing the skin of the user to be covered with a top sheet. For example, in disposable diapers fastened with a tape, such as those shown in FIGS. 13A to 13C and FIGS. 15A to 15C, there are cases in which only the area central in the direction of the body of the diaper has a top sheet 318 containing liquid permeable material. In many cases, an embodiment is selected in which a side sheet 319 containing breathable, water-repellent material is located at the edge of the body of the diaper. The breathable water-repellent material should preferably be a sheet of non-woven material obtained by manufacturing methods such as embossed carding or spunbond production. In particular, sheets of a nonwoven fabric having a high water repellent ability, such as sheets with an SMS structure, etc., are preferred.

[3-3] Back sheet:

The backsheet is a sheet positioned so that it covers the backsurface of the absorbent element (the surface facing away from the skin of the wearer when wearing the diaper). The backsheet is formed of a liquid impervious material to prevent the user's urine from escaping out of the diaper.

There are no special restrictions regarding the location of the back sheet. From the point of view of preventing leakage of urine absorbed by the absorbent element, it is preferable that the back sheet be placed so that it at least covers the location of the absorbent element.

Examples of liquid-impervious materials include liquid-impervious polymer-based films, such as polyethylene, etc. Of these films, microporous polyethylene film is particularly preferred. A microporous polyethylene film is a film in which numerous pores with a diameter of 0.1 to several microns have been formed, and although it is impermeable to liquids, it allows moisture to pass through. As a result, the diaper can be made impermeable and at the same time prevent the temperature from rising in the interior of the diaper.

In disposable tape diapers such as those shown in FIGS. 13A to 13D and FIGS. 15A to 15C, in many cases an embodiment is used in which the cover sheet 324 is attached to the outer surface of the back sheet 320. This cover sheet 324 is used to enhance the back sheet 320, as well as to improve the feel created by the back sheet 320 (softness of the back sheet 320 to the touch).

The materials used in the cover sheet may include, for example, fabric or non-woven material. Of these, dry or wet laid non-woven materials comprising polyethylene, polypropylene, polyester or other thermoplastic polymers / resins are preferred.

[3-4] Three-dimensional assemblies:

“Three-dimensional assemblies” are a leakage barrier that is located on the surface of the diaper in contact with the skin and rises when a three-dimensional shape is formed. Three-dimensional assemblies are in contact with the skin of the user and are used to prevent leakage of body excretions in the horizontal direction, while they overlap with stretching material for the legs. In the case of the three-dimensional assemblies 26 shown in FIGS. 1C and FIG. 19C, these assemblies are formed from a non-woven fabric sheet 32, and in many cases a configuration is used in which the three-dimensional assemblies, stretchable material 36 is placed and secured in its stretched state between the layers formed by the nonwoven sheet 32. This configuration leads to the formation of three-dimensional assemblies 26, rising up with the formation of a three-dimensional shape under the action of a tensile force created by forming three-dimensional assemblies, stretchable material 36.

Three-dimensional assemblies 26, similar to those shown in FIG. 1B and FIG. 1C and FIG. 19B and FIG. 19C, are often arranged in pairs on both the left and right sides of the absorbent element 22. Nevertheless, the three-dimensional assemblies can be arranged in two or more pairs on both the left and right sides of the absorbent element. For example, an embodiment may be selected in which a pair of three-dimensional assemblies is located on the inside of the body of the diaper, mainly to prevent leakage in the horizontal direction due to contact with the inside of the legs of the user, while an additional pair of three-dimensional assemblies is located with the outer side of the body of the diaper to prevent horizontal leakage due to contact with the skin around the user's legs (sometimes these three-dimensional assemblies on referred to as “three-dimensional leg assemblies”).

There are no particular restrictions regarding the quality of the material used in the nonwoven sheet. However, as with the side sheet, a nonwoven sheet containing breathable water-repellent material can be used with optimal results.

A sheet of nonwoven material can be used solely to form three-dimensional assemblies, or it can be used to form three-dimensional assemblies and other diaper materials. In the case of panty-shaped disposable diapers, the nonwoven sheet 32 is often used solely to form three-dimensional assemblies, as shown in FIGS. 1C and 19C, which are attached to the absorbent means 14 in an embodiment in which three-dimensional assemblies 26 are formed behind integral with the absorbent 14. At the same time, in the case of disposable diapers fastened with tape, the three-dimensional assemblies 326 and the side sheet 319 are often formed from a nonwoven sheet 332 containing a drain alkali nonwoven fabric, etc., as shown in FIG. 13A, FIG. 13B, FIG. 15A and FIG. 15B.

[3-5] Absorbent:

The term "absorbent means" refers to an absorbent pad that contains an absorbent element. The absorbent means is integrally formed with the outer material described below for configuring the panty-shaped disposable diaper. The term “absorbent pad” indicates an integral component with a pad form formed from an absorbent member, a top sheet and a back sheet.

As shown by the absorbent means 14 in FIG. 1C, FIG. 1D, FIG. 19C and FIG. 19D, for example, an upper sheet 18 that covers the front surface of the absorbent element 22, and a rear sheet 20 that covers the rear surface of the absorbent element 22, can be fastened around the periphery of the absorbent element 22, and the absorbent element 22 can be surrounded by layers formed by the upper sheet 18 and the back sheet 20. The absorbent means 14 shown in figv - fig.12D and figa and figv, formed same as the absorbent means 14 depicted on figa - figa.

[3-6] Outer material:

“Outer material” refers to a configuration that covers the user's torso. The "outer material" may be independent, or it may be combined with an absorbent and take the form of underpants with one hole for the waist and two holes for the legs formed therein.

The outer material 16 shown in FIGS. 1B and FIG. 19B is provided in the form of an outer material 62 of a front part and an outer material 65 of a back part that covers a user's body. It is integrated with the absorbent means 14 and takes the form of underpants with one hole 10 for the waist and two holes 12 for the legs formed in it. In addition, the outer material 216 shown in FIGS. 12A and 20A is configured such that the front cover portion 202, the portion 204 that covers the inside of the legs, and the rear cover portion 206 are integrated, and the outer material 216 is independent and takes the form of underpants with one hole 210 for the waist and two holes 212 for the legs formed in it.

The term “outer material” encompasses embodiments in which instead of joints 7 and 8 (joints 207 and 208) in the outer material 16 and 216, bonding fastening materials are provided, and the formation of the shape of the panties is facilitated by connecting these fastening materials to each other, or embodiments in which the shape of the underpants is already created by pre-bonding the fastening materials. Examples of bonding materials include mechanical bonding elements, etc.

There are no particular restrictions on the quality of the outer material. However, it is preferable that it be formed from a material that has excellent breathability to prevent an increase in the volume of the inner space of the diaper. Examples of material include polyethylene, polypropylene, polyester and other non-woven materials, etc., formed from composite fibers.

In many cases, the outer material comprises two or more sheets of nonwoven fabric bonded together. The outer material 16 shown in FIG. 1D and FIG. 19D, for example, consists of two or more sheets of non-woven material (inner sheets 61 and 64, outer sheets 63 and 66, and a holding sheet 68) bonded together in the form of a laminate. The outer material 216 shown in FIG. 12D and FIG. 20C also consists of two or more sheets of nonwoven material (inner sheet 215, outer sheet 217 and holding sheet 268) bonded together in the form of a laminate. Typically, stretch materials of various types are fixed in their stretched state between two or more sheets of nonwoven material.

[3-7] The main part of the diaper:

Many tape-fastened diapers do not use a two-component structure of absorbent material and external material. In a single-use diaper fastened with a tape, a configuration consisting of an absorbent element together with various sheets that cover the absorbent element is called “the main part of the diaper”. "The main part of the diaper" is a material in which the absorbent element is enclosed between layers formed from various sheets, and which demonstrates the implementation of the basic functions of the diaper, which are absorption and retention. At the same time, components that do not include an absorbent element and do not demonstrate the absorption and retention functions (lateral wrapping material — separate from the side sheet — and retention tape, etc.) do not form components of the “main part of the diaper”.

The disposable diaper 301A shown, for example, in FIG. 13A and FIG. 13B, and the disposable diaper 301B shown in FIG. 15A and FIG. 15B are formed with the diaper body 370 formed integrally from the absorbent member 322 and a top sheet 318, a side sheet 319, a back sheet 320 and a cover sheet 324 that cover the absorbent member 322. In the disposable diaper 301A and the disposable diaper 301B, a holding tape 311, a front side flap 372 and a rear side flap 374 n form the main portion 370 of the diaper.

[3-8] Various types of stretch material:

The disposable diaper of the present invention preferably should have stretchable material, such as stretchable waist material, stretchable leg material and auxiliary stretch material, etc., placed inside it. As already described, stretch material for legs, etc. can also be used as the stretch material described in the present invention as “stretch parts” and “elastic non-woven material”.

[3-8a] Stretch material for the waist:

The stretch material for the waist is a stretch material located in the waist cover portion. The waist assemblies in the waist closure are formed by means of a stretch material for the waist.

The stretch material for the waist should preferably be positioned to ensure alignment with the usable waist edge of the diaper. The expression "ensuring its alignment" means approximately parallel to the part defined as the base. In other words, there is no need for it to be strictly parallel. However, the stretch waist material 242 shown in FIG. 12A, FIG. 12D, FIG. 12E, and FIG. 20C is parallel to the waist edge 202c of the front cover portion 202 and the waist edge 206c of the rear cover portion 206.

In the case of a panty-shaped disposable diaper similar to that shown in FIG. 12A, FIG. 12D, FIG. 12E and FIG. 20C, multiple strips of linear stretch material are often used as stretch material 242 for the waist. In addition, in many cases, the stretch material 242 for the waist is located both in the front cover portion 202 and in the rear cover portion 206 in accordance with / flush with the waist edge 202c and 206c. The disposable diaper 1A shown in FIG. 1A, FIG. 1D and FIG. 1E, and the stretch waist material 42 shown in FIG. 19A, FIG. 19D, and FIG. 19E take the same configuration.

At the same time, in the case of single-use diapers fastened with tape, one piece of stretch sheet type material (elastic foam material, etc.) is often used as stretch material 342 for the waist, as shown in FIG. 15A and FIG. 15C. Stretch material for the waist can be placed both in the front cover portion 302 and in the rear cover portion 306 in line with the waist edge 370c and 370d, as shown in FIG. 15A and FIG. 15C, or it can only be located in back cover part in line with the waist edge of the back cover part.

[3-8b] Stretchable Leg Material:

The stretch material for the legs is a stretch material placed in the part covering the inner sides of the legs. Leg assemblies are formed in the part covering the inside of the legs as a result of the presence of stretchable leg material.

In the case of a panty-shaped disposable diaper similar to that shown in FIG. 12A, FIG. 12B, FIG. 12E and FIG. 20A, multiple strips of linear stretch material are often used as stretch material 240 for the legs. In addition, in many cases, an embodiment has been selected in which the stretch material 240 for legs is positioned along a curve in line with / on a line with the outer edge of the leg hole 212 provided in the outer material 216. In this embodiment, it is preferable to arrange the stretch material 240 for legs so that it does not cross the center of the trunk in the part 204 covering the inner sides of the legs, as shown in fig.12E. This embodiment makes it difficult to create a situation in which the stretch material 240 for legs creates a tensile force acting in the center of the trunk in part 204 covering the inside of the legs. This prevents the absorbent element 22 from shifting and facilitates the fit of the absorbent element 22 to the inner sides of the legs of the user.

The disposable diaper 1A shown in FIG. 1A, FIG. 1B and FIG. 1E and the disposable diaper 1B shown in FIG. 19A, FIG. 19B and FIG. 19E have leg stretch material 40 in a straight line in the inner part of the legs covering part 4 of the outer material 65 of the rear part. Stretchable leg material 40 is parallel to the waist edge 65c of the outer back material 65. In this configuration, the area of the outer material 65 of the back, located in the part 4 covering the inner sides of the legs, is contracted in accordance with the pulling of the stretch material 40 for the legs towards the edge of the absorbent means 14. As a result, the aforementioned area changes shape in accordance with the shape around the legs the user, which improves fit from the user's feet.

In addition, the disposable diaper 1A shown in FIG. 1A, FIG. 1B and FIG. 1E, and the disposable diaper 1B shown in FIG. 19A, FIG. 19B and FIG. 19E, have stretch leg material 38 located in a straight line in accordance with / flush with both edges of the absorbent element 22 in the absorbent body 14. In an embodiment of this type, the stretch materials 38 and 40 for the legs and the auxiliary stretch material 44 of the outer material 62 of the front part are integrated into one, which provides an improvement in fit from the user's feet.

In addition, placing the stretch material 38 for the legs in a certain position means that when the diaper is worn, both edges of the absorbent means 14 will be more likely to rise to the vertical position than the absorbent element 22. An embodiment of this type makes the urine more likely accumulate in the center of the absorbent means defined in the width direction 14 (in other words, in the part in which the absorbent element 22 is located) after urination. This makes urine leakage less likely.

In the case of disposable tape diapers such as those shown in FIG. 13B, FIG. 13D, FIG. 15A, FIG. 15B and FIG. 15E, multiple strips of linear stretch material are often used as stretch material 340 for the legs. In addition, an embodiment is often chosen in which multiple left and right pairs of linear stretch material are arranged in pairs in a straight line, aligned / flush with the side edges of the absorbent member 322 in at least a portion 304 covering the inside of the legs.

[3-8c] Auxiliary stretch material:

Auxiliary stretch material is a stretch material located in the auxiliary coating. Auxiliary assemblies are formed in the auxiliary coating as a result of the presence of auxiliary tensile material. This stretchable material is provided primarily in disposable panty-shaped diapers.

In the case of panty-shaped disposable diapers, such as those shown in FIGS. 12A, FIG. 12B, FIG. 12E and FIG. 20A, multiple strips of linear stretch material are often used as auxiliary stretch material 244. In addition, auxiliary stretch material 244 often aligned / flush with the waist edge 202c and 206c in straight lines and in the front cover portion 202 and the rear cover portion 206. For the same reasons as were shown with respect to the stretch mater Ala leg, similar to that shown in fig.12E, auxiliary stretch material 244 should preferably be located so that it does not intersect the location of the absorbent element 22. Auxiliary stretch material 44 in the diaper 1A disposable, shown in figa, figa and FIG. 1E and the disposable diaper 1B shown in FIG. 19A, FIG. 19B and FIG. 19E also take the same configuration.

[3-8d] Configuration of stretch material, etc.

Optimum stretch materials are rubber for threads, including elastic threads made from strip rubber of natural origin or synthetic rubber (urethane rubber, etc.). In addition, an elastic net, an elastic film, an elastic foam material (polyurethane foam, etc.), etc. can also be used.

The stretchable material should preferably be fixed with a stretch / elongation of 120 to 400%, and more preferably with a stretch of 200 to 300%. Within this range, the user is not exposed to excessive pulling force, and sufficient elasticity can be ensured. Stretchable material can be attached by using an adhesive to adhere it, or by using heat or ultrasound to fuse it. As an adhesive, a hot-melt adhesive without adhesive or any other adhesive with high fluidity can be used. As a fusion method, heat sealing, etc. can be used.

There are no particular restrictions on the method of attaching the stretch material. However, an example of an attachment method is a method in which at least one of the materials representing a stretch material and a sheet of nonwoven material covering the stretch material on both sides has adhesive, either deposited or sprayed onto it. The application method may be a spiral application method, etc.

In the case of panty-shaped disposable diapers, any of the stretch material for the waist, the stretch material for the legs and the auxiliary stretch material can be placed in a predetermined position by a fastening method, etc., for example, when placing it between several sheets forming outer material.

For example, in the disposable diaper 1A of FIG. 1D and the disposable diaper 1B of FIG. 19D, the stretch material 42 for the waist is secured by placing it between the layers formed by the holding sheet 68 and the outer sheets 63 and 66. B at the same time, in the disposable diaper 201A shown in FIG. 12D, the stretch material 242 for the waist is fixed by placing it between the layers formed by the holding sheet 268 and the outer sheet 217.

In addition, in the disposable diaper 1A shown in FIG. 1E and the disposable diaper 1B shown in FIG. 19E, the leg stretch material 40 and the auxiliary stretch material 44 are fixed by placing them between the inner sheets 61 and 64 and the outer sheets 63 and 66. At the same time, in the disposable diaper 201A shown in FIG. 12E, the stretch material 240 for the legs and the auxiliary stretch material 244 are fixed by placing them between the layers, the image the outer inner sheet 215 and the outer sheet 217.

However, the stretch material for the legs can be fixed by using a method such as placing it between several sheets forming an absorbent. For example, in the disposable diaper 1A shown in FIG. 1C and the disposable diaper 1B shown in FIG. 19C, the leg stretch material 38 is fixed by placing it between the layers formed by the nonwoven fabric sheet 32 attached to the absorbent means 14 for the formation of three-dimensional assemblies 26, or between the layers formed by the sheet 32 of nonwoven material and the covering sheet 24.

At the same time, in the case of disposable diapers fastened with a tape, both stretch material for the waist and stretch material for the legs can be placed in a predetermined position by attaching them, etc., when they are located between layers that are formed by several sheets forming the bulk of the diaper. For example, the stretch material for the waist can be fixed by placing it between the layers formed by the back sheet and the cover sheet.

In addition, in the disposable diaper 301A shown in FIG. 13B and the disposable diaper 301B shown in FIG. 15B, the leg stretch material 340 is fixed by placing it between the layers formed by the side sheet 319 consisting of a nonwoven sheet 332 and a cover sheet 324. However, the stretch material for the legs is also fixed by placing it between the layers formed by the top sheet and the cover sheet.

[3-9] Retention tape:

The term “holding tape” refers to a tape that holds any one of the front cover portion and the rear cover portion from the usable other one. Typically, as in the case of the holding tape 311 shown in FIG. 13A, FIG. 13D, FIG. 15A and FIG. 15C, it is superimposed so that it extends outward in a downward and backward direction from the left and right edges of the rear cover portion 306 ( from the edges 374a and 374b of the rear side flaps).

The retaining tape should preferably include a bonding material. There are no particular restrictions on the type of bonding material. Nevertheless, mechanical fastening elements (surface fastening elements) are preferred. The mechanical fastening elements are firmly “closed”, and the closing strength provided by them does not decrease even if the tape is opened and closed many times, and therefore they are preferred. The material 350 forming the holding tape 311 shown in FIG. 13A, FIG. 13D, FIG. 15A, and FIG. 15C has hooks 348 of a mechanical fastener in an area close to its edges. At the same time, an embodiment is often used in which the front cover portion 302 shown in FIG. 13D and FIG. 15C has a front cover 313 comprising material 346 with loops of a mechanical fastener.

There are no particular restrictions on the number of retaining tapes. The number of retaining tapes should correspond to the physical dimensions of the user (in particular, his waist circumference, leg circumference, etc.). Typically, one pair of tapes is provided for disposable diapers intended for infants (one on each of the left and right sides), and two pairs (two on each of the left and right sides) are provided for disposable diapers for adults.

Options for implementation

The following is a more accurate description of the disposable diaper of the present invention with reference to schematic images. However, the disposable diaper of the present invention “encompasses” all disposable diapers provided with items / objects detailed in the invention, and is not limited to the types described in the embodiments.

(First Embodiment)

A panty shaped disposable diaper was made as a first embodiment of a disposable diaper. Its particular configuration was that of the disposable diaper 1A depicted in FIGS. 1A to 1E. This disposable diaper 1A had a size L for an infant with a total length of front to back of 485 mm and a width of 325 mm in the front cover portion 2 and the rear cover portion 6 (the distance between the edges 2a and 2b and between the edges 6a and 6b). The manufacturing method was corresponding to the processes shown in FIG. 11A and FIG. 11B.

In a disposable diaper 1A similar to that shown in FIG. 1F and FIG. 2A to FIG. 2C, the cell forming sheet 82 is located on the skin contact surface of the stretch portion 80, and the cell forming sheet 82 is attached to the holding sheet 68, which is a nonwoven material forming the stretch portion 80, and these compounds 84 form a zigzag pattern in the direction of the torso of the diaper. As shown in FIG. 1B and FIG. 1D, the honeycomb structure is formed not only in the rear covering portion 6 of the diaper, but also in the front covering portion 2.

In the disposable diaper 1A, similar to that shown in FIG. 1B and FIG. 1D, the folded portion 88 of the outer sheets 63 and 66, which form the outer material 62 of the front part and the outer material 65 of the back part, is used as the sheet forming sheet 82. A nonwoven spunbond production method having a surface density of 19 g / m ² was used as the cell forming sheet 82.

In the disposable diaper 1A, the folded portion 88 is formed by one edge of the outer sheets 63 and 66 folded over the top sheet 18 at the waist edges 62c and 65c. The length of the folded portion 88 from front to back is 80 mm.

A nonwoven sheet separate from the inner sheet 61 and 64 and the outer sheet 63 and 66 is arranged as the holding sheet 68. The holding non-woven fabric 68 uses the same non-woven spunbond material as that used for the sheet forming sheet 82, in other words , water-repellent non-woven material with a surface density of 19 g / m ² .

As shown in FIG. 1D and FIG. 1F, the edge of the holding sheet 68 is configured so that it protrudes from the edge of the folded portion 88. A portion of the absorbent means 14 is covered by this protruding portion. The protruding part is configured so that it protrudes only 40 mm from the edge of the sheet 82 forming the cell and covers part of the absorbent means 14 at a distance of 25 mm from the edge.

A sheet of length 80 mm is used as the holding sheet 68 (diaper sizes from front to back), and the folded portion 88 is attached to the holding sheet 68. The joints 84 are formed so that the opening width of the open edge of the cells 86 is 8.5 mm and the depth of the cells is 38 mm, and this configuration has a total of 76 outward and inwardly facing cells facing the body of the diaper.

As shown in FIG. 1D, six pieces of stretch material 42 for the waist were placed in a stretched state, placed between the holding sheet 68 and the outer sheets 63 and 66, aligned with the user belt edges 62c and 65c and stretched with a degree of stretching of 300% ( to a length three times the original length) to form a stretch portion 80. The stretch material 42 for the waist contained strip rubber made from natural rubber (thickness 0.35 mm × width 0.65 mm).

(Second Embodiment)

A panty shaped disposable diaper was made as a second embodiment of a disposable diaper. Its particular configuration was that of the disposable diaper 201A depicted in FIGS. 12A to 12E. This disposable diaper 201A has a total length in the front to back direction of 520 mm, and the width of the rear cover portion 6 (the distance between the edges 6a and 6b) is 380 mm.

The absorbent agent was the same absorbent agent 14 as the absorbent agent used in the disposable diaper of the first embodiment. The length of the absorbent means 14 in the front to back direction was 420 mm. Forming three-dimensional assemblies, stretch material 36 and stretch material 38 for the legs were fixed in the zone, the length of which was only 260 mm, in the part 204 that covers the inner sides of the legs. The outer material 216 was not a material divided into front and rear materials as the outer material used in the disposable diaper of the first embodiment, but, on the contrary, the combined front covering part, the part covering the inner sides of the legs, and the rear covering part were used formed as a whole. The narrowest part of the part covering the inner sides of the legs (the location of the plane A-A ′ section) had a width of 175 mm. Stretchable leg material 240 placed on the outer material 216 was positioned along a curved line corresponding to the outer edge of the leg openings 212 in the outer material 216.

In the disposable diaper 201A shown in FIG. 12C, the cell forming sheet 282 is located on the skin contact surface of the stretch portion 280, and the cell forming sheet 282 is attached to the nonwoven sheet 32, which is the nonwoven fabric forming the stretch part 280, and these compounds 284 form a zigzag pattern in the direction corresponding to the edge of the part covering the inner sides of the legs.

In the disposable diaper 201A shown in FIG. 12C, a nonwoven sheet separate from the nonwoven sheet 32 forming the three-dimensional assemblies 26 is used as the cell forming sheet 282. In particular, a water-repellent non-woven fabric sheet with an SMS structure having a surface density of 15 g / m ^{2 is used} . The width of the sheet forming the cell (dimensions in the direction of the trunk of the diaper) was 17 mm, and the length (dimensions in the direction from front to back) was 420 mm. In addition, the front and rear edges of the sheet forming the cells were connected along lines corresponding to the front and rear edges of the absorbent means.

As shown in FIG. 12B, joints 284 were formed so that the opening width of the open edge of the cells was 6.5 mm, and the depth of the cells was 15 mm, and this configuration had only 80 outward and inward cells formed to align them with the user the edges of the portion 204 covering the inside of the legs.

As shown in FIG. 12C, three pieces of a three-dimensional assembly, stretchable material 36 were placed in a stretched state with them superimposed between the main part of the nonwoven sheet 32 and the folded part with a degree of stretching of 300% (to a length three times the original length) to form a stretch portion 280. Forming three-dimensional assemblies, the stretch material 36 contained strip rubber made from natural rubber (thickness 0.35 mm × width 0.65 mm).

(Third Embodiment)

As a third embodiment, a disposable diaper 301A was fastened with a tape as shown in FIG. 13A to FIG. 13D. This tape-fastened diaper 301A had a size L for infants and was formed with a rectangular shape, with the main part 370 of the diaper having a length in the front to back direction of 485 mm and a width of 230 mm.

On the edge of the diaper main body 370, a rubber thread was placed as a stretch material 340 for the legs. Three pieces of stretch material 340 for the legs were placed on each of the left and right sides, in increments of 7 mm. The stretch material 340 for the legs, located closest to the outside of the diaper, was located at a distance of 7 mm from the edges 370a and 370b of the main part 370 of the diaper. The stretch material 340 for the legs was fixed in a stretched state at a degree of stretching of 300% between the side sheet 319 and the cover sheet 324 to form the stretch portion 380.

The cell-forming sheet 382 was attached to the skin-contacting surface of the side sheet 319. The width of the cell-forming sheet 382 was 26 mm. Compounds 384 formed a zigzag pattern aligned with the user edge of the portion 304 covering the inner sides of the legs (edges 370a and 370b of the diaper body 370). The width of joints 384 was 0.4 mm. Sheet 382, forming a cell, consisted of a nonwoven material spunbond production method and was a sheet of polypropylene nonwoven material with a surface density of 18 g / m ² . This cell forming sheet 382 was attached to the skin contacting surface of the side sheet 319 using ultrasonic welding. Compounds 384 were formed so that the opening width of the open edge of the cells is 6 mm and the depth of the cells is 25 mm, and this configuration includes a total of 80 outward and inward cells (40 outward cells and 40 inward cells) formed from ensuring their alignment from the user edge of the part 204, covering the inner sides of the legs.

The elastic nonwoven fabric 396 was intermittently attached in the direction of the diaper body to a skin contact surface in the region of the waist edges 370c and 370d of the diaper body 370. As sheets 397 and 398 of non-woven material forming an elastic non-woven material, a sheet of water-repellent non-woven material with an SMS structure having a surface density of 15 g / m ^{2 was used} . 10 threads, which are rubber threads, were fastened between sheets 397 and 398 of non-woven material as stretch material 399 with a step of 5 mm, and when stretched to 300%.

An elastic nonwoven fabric 396 was attached to the skin-contacting surface of the waist edges 370c and 370d of the diaper body 370 through the use of ultrasonic welding (joint 386). In other words, the waist edges 370c and 370d of the diaper body 370 (waist cover portion) were used as the sheet forming the cells. Compounds 385 were formed so that the opening width of the open edge of the cells is 8.5 mm and the depth of the cells is 30 mm, and this configuration includes a total of 36 outward and inward cells (18 outward cells and 18 inward cells), formed so that they are turned in the direction of the trunk of the diaper.

(Fourth Embodiment)

As a fourth embodiment, a disposable diaper 301C was fastened with a tape as shown in FIGS. 17A to 17C. This disposable diaper 301C had a size L for infants and was formed with a rectangular shape, with the main part 370 of the diaper having a length in the front to back direction of 485 mm and a width of 230 mm.

At the edge of the diaper main body 370, a rubber thread with a thickness of 620 dtex was placed as a stretch material 340 for the legs. Three pieces of stretch material 340 for the legs were placed on each of the left and right sides, in increments of 5 mm. The stretch material 340 for the legs, located closest to the outside of the diaper, was 10 mm from the edges 370 a and 370 b of the main part 370 of the diaper. Stretchable leg material 340 was secured in a stretched state at a degree of stretch of 250% between the side sheet 319 and the back sheet 320 and between the side sheet 319 and the cover sheet 324 to form the stretch portion 380.

The non-woven fabric sheet 333 (cell-forming sheet 382) was intermittently attached to the skin-contacting surface of the side sheet 319 to align it with a user edge of the portion 304 covering the inside of the legs (edges 370a and 370b of the diaper main body 370). Sheet 382, forming a cell, consisted of a nonwoven material spunbond production method and was a sheet of polypropylene nonwoven material with a surface density of 18 g / m ² . This cell forming sheet 382 was attached to the skin contacting surface of the side sheet 319 using ultrasonic welding. Joints 384, or more precisely, rectangular joints with a width of 0.4 mm and a length of 10 mm, were formed in the form of numerous assemblies, and the rectangular joints were arranged in a specific order at intervals of 7 mm in the direction of the edge of the portion 304 covering the inner sides legs, and at intervals of 1 mm in the direction of the trunk of the diaper.

In addition, three-dimensional assemblies 327 were formed from a portion of the non-woven fabric sheet 333. The length of the three-dimensional assemblies 327 from the fixed edge (lower edge) to the free edge (upper edge) was 30 mm. The rubber thread was placed in three-dimensional assemblies 327 as forming three-dimensional assemblies, stretchable material 337. Four pieces of forming three-dimensional assemblies, stretchable material 337 were placed on each of the left and right sides in increments of 5 mm. Forming three-dimensional assemblies, stretchable material 337, located closest to the free edge of three-dimensional assemblies 327, was at a distance of 2 mm from the free edge. Forming three-dimensional assemblies, the stretchable material 337, stretched to a state corresponding to a degree of stretching of 300%, was fixed between the layers formed by the main part 379 of the sheet 334 of nonwoven material and the sheet 333 of nonwoven material to form a stretchable part.

A nonwoven sheet 334 (cell forming sheet 383) was intermittently attached to a skin contact surface in an area 20 mm from the free edge of the three-dimensional assemblies 327 to ensure alignment from the user edge of the portion 304 covering the inside of the legs (main edges 370a and 370b part 370 of the diaper). The cell forming sheet 383 was attached by using ultrasonic welding to the skin-contacting surface of the non-woven fabric sheet 333. Compounds 385 were formed with the same rectangular shape and in accordance with the same embodiment as in the case of compounds 384. As sheets 333 and 334 of non-woven material, a sheet of water-repellent non-woven material with an SMS structure having a surface density of 15 g / was used m ² .

Industrial applicability

The disposable diaper of the present invention can be used as a disposable diaper for infants or adults, can be used by older people and people with disabilities who need care, and more specifically, can be used as a disposable diaper of the form panties, or a disposable diaper fastened with tape.

Description of Reference Positions

1A and 1B: disposable diaper, 2: front closure, 4: closure on the inside of the legs, 6: rear closure, 7 and 8: joints, 10: waist hole, 12: leg hole, 14: absorbent means, 16: outer material, 18: top sheet, 20: back sheet, 22: absorbent element, 24: cover sheet, 26: three-dimensional assemblies, 28: joints, 32: non-woven sheet, 36: forming three-dimensional assemblies, stretch material 38 and 40: stretch material for legs; 42: stretch material for waist; 44: auxiliary stretchable material, 54: upper thin fabric material, 56: lower thin fabric material, 64 and 61: inner sheet, 62: outer front material, 62a and 62b: edge, 62c: waist edge, 66 and 63: outer sheet, 65: outer back material, 65a and 65b: edge, 65c: waistband, 67, 69, 71, 73 and 75: nonwoven sheet, 68: holding sheet, 78: exposed part, 80 and 81: stretched part 82, 82A, 82B, 82C, 82D, 82E, 82F and 83: cell forming sheet, 84, 84A, 84B, 84C, 84D, 84E, 84F and 85: compounds, 86, 86A, 86B, 86C, 86D, 86E and 86F: cell, 88: folded part, 89: slot, 201: disposable diaper, 202: front cover, 202a and 202b: edge, 202c: waist, 204: cover on the inside of the legs, 206: back cover, 206a and 206b: edge, 206c: waist, 207 and 208 : joints, 210: waist hole, 212: leg hole, 215: inner sheet, 216: outer material, 217: outer sheet, 240: stretch material for the legs, 242: stretch material for the waist, 244: auxiliary stretch material, 268: retaining sheet, 280: stretch portion, 282: cell-forming sheet, 284: joints, 301A and 301B, 301C, 301D and 301E: disposable diaper, 302: front covering part, 304: covering part of the inside of the legs, 306: rear covering part, 311: holding tape, 313: front cover, 318: top sheet, 319 : side sheet, 320: back sheet, 322: absorbent element, 324: cover sheet, 326 and 327: three-dimensional assemblies, 332, 333 and 334: non-woven sheet, 336 and 337: forming three-dimensional assemblies, stretchable material, 340: stretchable foot material, 342: stretch material for the waist, 346: material with loops, 348: material with a hook mi, 350: bulk of the material, 370: bulk of the diaper, 370a and 370b: hem, 370c and 370d: waistband, 372: front side flap, 374: rear side flap, 374a and 374b: hem, 378 and 379: folded part, 379: main part of the material, 380 and 381: stretch part, 382 and 383: cell-forming sheet, 384, 384A, 384B, 384C and 385: joints, 386: cells, 390, 390A, 390B and 390C: linear joints, 392, 392A and 392B: point-type joints, 396: elastic non-woven fabric, 397 and 398: non-woven fabric sheet, 399: stretch fabric.

Claims (13)

1. A disposable diaper comprising a front cover portion and a rear cover portion that covers the wearer's body, in addition to a portion covering the inside of the legs, with an absorbent member located therein that covers the inside of the legs of the user, in which:
at least one of the front cover portion, the rear cover portion, or the portion covering the inside of the legs includes a stretch portion formed of elastic nonwoven fabric, wherein
stretchable elastic nonwoven fabric is attached to the nonwoven fabric sheet, and the nonwoven fabric sheet and stretch material are moved together,
the stretch part is formed with the possibility of constriction in at least one direction from the direction of the body and the direction of the edge of the part covering the inner sides of the legs,
the sheet forming the cells and containing non-woven fabric is located on a portion of the skin contact surface in an area that is formed by the stretch portion, and
connections formed to provide an intermittent connection of the sheet forming the cell and the stretch part in the direction in which the stretch part is pulled, whereby cells are formed and formed between the layer of the sheet forming the cell and the layer of the stretch part, wherein these cells pass, that they cross the direction in which the stretched part is pulled together,
wherein the cells are impermeable, and they are open on one edge and closed on the other, and the cells include outward facing cells in which the edges of the cells closest to the outer space of the diaper are open and the edges of the cells farthest from the outer space of the diaper are closed connections, and inwardly facing cells in which the edges of the cells farthest from the outer space of the diaper are open, and the edges of the cells closest to the outer space of the diaper are closed by the joints. 2. The disposable diaper according to claim 1, wherein the plurality of cells are formed in the form of rows of cells arranged in parallel in the constriction direction, wherein the rows of cells are arranged so that the outward facing cells and the inward facing cells alternate. 3. The disposable diaper according to claim 2, in which the connections are zigzag or wavy lines that extend continuously in the direction of contraction, as a result of which alternately outwardly facing cells and inwardly facing cells are formed and formed. 4. The disposable diaper according to any one of paragraphs. 1-3, in which a plurality of cells are formed in the form of rows of cells arranged in parallel in the direction of contraction, and the rows of cells are arranged in several tiers facing in the direction of intersection, and the plurality of rows of cells are arranged so that some of the compounds that form and form the cells in one row of cells passing in the direction of intersection, and some of the compounds that form and form cells in the row of cells adjacent to the mentioned row of cells passing in the direction of intersection are not on the same straight line ui. 5. The disposable diaper according to claim 4, wherein the plurality of rows of cells are arranged such that an extended line extending from the part of the joints that form and form the cells in the form of one row of cells extending in the direction of intersection passes through the cells in the row of cells, adjacent to the mentioned row of cells. 6. A disposable diaper comprising a front cover portion and a rear cover portion that covers the wearer's body, in addition to a portion covering the inside of the legs, with an absorbent element located therein that covers the inside of the legs of the user, in which:
at least one of the front cover portion, the rear cover portion, or the portion covering the inside of the legs includes a stretch portion formed of elastic nonwoven fabric, wherein
stretchable elastic nonwoven fabric is attached to the nonwoven fabric sheet, and the nonwoven fabric sheet and stretch material are moved together,
the stretch part is formed with the possibility of constriction in at least one direction from the direction of the body and the direction of the edge of the part covering the inner sides of the legs,
the sheet forming the cells and containing non-woven fabric is located on a portion of the skin contact surface in an area that is formed by the stretch portion, and
connections formed to provide an intermittent connection of the sheet forming the cell and the stretch part in the direction in which the stretch part is pulled, whereby cells are formed and formed between the layer of the sheet forming the cell and the layer of the stretch part, wherein these cells pass, that they cross the direction in which the stretched part is pulled together,
wherein the stretch part of elastic nonwoven fabric is formed at least on the edge of the part covering the inner sides of the legs, so that it is pulled together with the edge of the part covering the inner sides of the legs, and
a cell-forming sheet containing a water-repellent non-woven fabric is located over a portion of the skin-contacting portion of the surface covering the inside of the legs, and
in order to provide an intermittent connection of the sheet forming the cell and the stretch part in a direction that corresponds to the direction of the edge of the part covering the inner sides of the legs, connections are formed, as a result of which cells are formed and formed between the layer of the sheet forming the cell and the layer of the stretch part, wherein the cells pass so that they cross the edge of the part covering the inner sides of the legs. 7. The disposable diaper according to claim 6, in which
in the part covering the inner sides of the legs, the stretching part of the elastic non-woven fabric is formed at least at the edge of the rear covering part so that it is pulled towards the body,
a cell-forming sheet comprising a water-repellent non-woven fabric is located over a portion of the skin-contacting surface of the edge of the rear covering portion, and
compounds are formed that provide an intermittent connection of the sheet forming the cell and the stretching part in the direction of the body, as a result of which cells are formed and formed between the layer of the sheet forming the cell and the layer of the stretching part, so that the cells pass so that they cross the direction of the body. 8. The disposable diaper according to claim 7, in which
in the front covering part, the stretching part is formed of elastic nonwoven fabric, at least on the edge of the part covering the inner sides of the legs, so that it is pulled towards the body,
a cell-forming sheet comprising a water-repellent non-woven fabric is located over a portion of the skin-contacting surface of the edge of the portion covering the inside of the legs, and
compounds are formed that provide an intermittent connection of the sheet forming the cell and the stretching part in the direction of the body, as a result of which cells are formed and formed between the layer of the sheet forming the cell and the layer of the stretching part, so that the cells pass so that they cross the direction of the body. 9. The disposable diaper according to claim 8, wherein
at least one of the stretchable parts formed on the edge of the part covering the inner sides of the legs, the edge of the part covering the inner sides of the legs in the front covering part, and / or the edge of the rear covering part in the part covering the inner sides of the legs, is continuously located for forming a stretchable leg portion that is wrapped around the user's legs, and
the joints are formed to provide an intermittent connection of the sheet forming the cell and the stretch leg portion in the direction of the stretching of the stretch leg portion, whereby cells are formed and formed between the layer of the sheet forming the cell and the layer of the stretch part, with the cells passing so that they cross the direction of contraction of the stretch leg portion. 10. A disposable diaper according to any one of paragraphs. 6-9, in which the stretch portion comprises a plurality of layers of a nonwoven fabric sheet, between which stretchable material is located, and, further, the stretchable material is attached to the plurality of sheets of nonwoven fabric, and the plurality of sheets of nonwoven fabric and the stretchable material are moved together.      11. The disposable diaper according to any one of paragraphs. 6-9, in which an elastic film is attached to the nonwoven fabric sheet, and the nonwoven fabric sheet and the elastic film are moved together. 12. The disposable diaper according to any one of paragraphs. 6-9, in which the cell-forming sheet and the stretch portion are connected by joints formed intermittently in the constriction direction of the stretch portion and continuously in a direction perpendicular to the constriction direction of the stretch portion. 13. The disposable diaper according to any one of paragraphs. 6-9, in which the cell-forming sheet and the stretch part are connected by joints formed intermittently in the direction of constriction of the stretch part and in a direction perpendicular to the direction of constriction of the stretch part.

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