JP2003093436A - Disposable paper diaper and structure of package of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable paper diaper to be folded compactly and without deteriorating the capability of preventing the liquid leakage when the diaper is taken out of a package bag after having been packaged for a long period of time. SOLUTION: The disposable paper diaper consists of a top sheet, a back sheet, and an absorbent material disposed between the sheets, and has a waist opening part and a pair of leg opening parts. In the disposable paper diaper, the ratio L2 /L1 between the length L1 of the pant lower part from the end part to the crotch part of the absorbent material in the longitudinal direction and the length L2 from the absorbent material to the waist opening part above is within the range from 0.2 to 0.9. In addition, standing cuffs to stand aslant toward the periphery of legs of a wearer when the diaper is used are formed along the left and right sides of an absorbent pad including the absorbent material. The free parts standing aslant toward the periphery of the standing cuffs are located so that they will not be pressure-welded on the absorbent material when they are fallen down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper and a disposable paper diaper that can be compactly folded and that does not hinder the liquid absorption performance when taken out from a packaging bag after being packaged for a long time. Regarding packaging structure.

[0002]

2. Description of the Related Art As a compact packaging structure for disposable paper diapers, for example, as shown in Japanese Patent Laid-Open No. 11-113956, the left and right sides of the disposable paper diaper are folded back to the front side or the rear side, and at the top of the paper diaper. There is known a packaging structure in which a lower part of a paper diaper is folded in a state of being overlapped with each other and is stored in a packaging bag in this state. In addition, most commercial products reduce the volume of the packaging bag, so that disposable diapers are compressed and then stored in the packaging bag. However, in such a conventional packaging structure, when it is taken out from the packaging bag, the absorption performance of the absorbent body may be deteriorated due to compression, and the liquid leakage prevention property thereof may be deteriorated.

[0003]

DISCLOSURE OF THE INVENTION The present invention is a disposable paper diaper which can be folded compactly and which does not hinder the reduction of the absorption performance when taken out from the packaging bag after being packaged for a long time. It is an object to provide the packaging structure.

[0004]

According to the present invention, the following disposable diaper and packaging structure are provided. (1) In a disposable paper diaper having a waist opening and a pair of leg openings, and comprising a top sheet, a back sheet, and an absorbent body arranged between these sheets, the disposable paper diaper has the absorbent body. The ratio L ₂ / L of the length L _{1 of the} underpants from the end of the absorbent pad in the length direction to the crotch and the length L ₂ from the absorbent to the upper waist opening.
₁ is formed so as to fall within the range of 0.2 to 0.9, and stands upright around the legs of the wearer along the left and right sides of the absorbent pad having the absorbent body in use. Disposable paper diaper, characterized in that a standing cuff is provided, and a free portion inclined and standing toward the leg of the standing cuff is positioned so as not to abut on the absorbent body in a lying state. (2) The disposable paper according to (1), wherein the free portion is fixed on the absorbent pad in a state in which the free portion faces the widthwise center side of the absorbent pad in the longitudinal front and rear portions. Diaper. (3) The free portion has a standing portion that extends from the base end portion toward the center of the absorber and a contact portion that folds back toward the outer side in the middle, and the standing portion of the absorber pad is provided. In the front and rear portions in the longitudinal direction, fixed on the absorbent pad in a state of heading toward the widthwise center side of the absorbent body, and fixed on the upright portion in a state in which the corresponding portion is folded back. Disposable disposable diaper as described. (4) The free portion is fixed on the absorbent body in a longitudinal front and rear direction of the absorbent pad in a state of being directed outward in the width direction of the absorbent pad, and a tip portion of the free portion is Said (1) located inside the width direction side edge part of an absorber
The disposable diaper described in. (5) The disposable paper diaper according to any one of (1) to (4), wherein the folded position is folded to a position avoiding the absorbent body in a packaged state. (6) The disposable paper diaper packaging structure according to (5), wherein the disposable paper diapers are packaged with a plurality of packaging materials, and the ventral side and the other of the adjacent one paper diaper in a stacked state. The disposable diaper packaging structure is characterized in that it is packaged with the back side of the paper diaper facing each other. (7) The packaging structure for disposable diapers according to (6), wherein the compression rate in the packaged state is in the range of 10 to 80%.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A disposable paper diaper for compression packaging used in the present invention (hereinafter also simply referred to as a paper diaper) has a waist opening and a pair of leg openings, and has a central portion at the bottom of the paper diaper. In addition, an absorbent pad having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these sheets is additionally provided.

FIG. 1 shows a schematic view of a paper diaper, FIG. 2 shows a perspective view thereof, and FIG. 3 shows a developed view of the paper diaper. In these figures, 1 is a waist part, 2 and 3 are leg parts, 4 is an absorber, 4'is an absorber pad having an absorber, 5 and 6 are upper and lower end sealing parts of the absorber pad, respectively. 7 and 8 are standing cuffs, 9 is a ventral side of the absorbent body, 10 and 11 are crotch of the absorbent body, 12 is a back side of the absorbent body, 13 and 16 are upper parts of a disposable diaper,
Reference numerals 14 and 15 denote lower portions of the paper diaper, and A denotes a paper diaper outer layer sheet.

The outer layer sheet A, which is mainly composed of a disposable diaper, is formed from a sheet-like material such as cloth, non-woven fabric, or film.
It is preferably composed of two nonwoven fabrics. In the outer layer sheet A, the portion 13 corresponding to the periphery of the waist opening,
An elastic member (elastic body such as thread-shaped or band-shaped rubber) is usually attached to the portion 16 along the periphery of the opening. Further, the diaper lower portions 14 and 15 corresponding to the periphery of the leg opening are usually provided with elastic members along the peripheral direction of the opening. A method of attaching these elastic members to the outer layer sheet A can be performed by a conventionally known method, for example, by sandwiching the elastic member between two nonwoven fabrics.

An absorber pad 4'having an absorber 4 is attached to the inside of the central portion of the lower portion 14 and 15 of the diaper (on the side of contact with the wearer). The pad 4'can be of various types known in the art. This absorbent pad 4 '
Is a liquid-permeable top sheet having an absorbent body 4, a liquid-impermeable back sheet, and is interposed between these two sheets. The absorbent pad 4'is sealed at its peripheral edge. In FIG. 3, an upper end sheet portion (sheet overlapping portion located at an upper end portion of the absorbent body pad 4) 5 formed above the absorber 4 in the pad 4 ′ and a lower end sheet portion formed below the absorber 4 The (sheet overlapping portion located at the lower end portion of the absorbent pad 4 ') 6 indicates a sealing portion. Both end sheet portions of the absorbent pad 4'are also formed in the sealing portion (not shown). Further, the absorbent pad 4'is provided with standing cuffs along both side edges thereof. In FIG. 3, 7 and 8 show standing cuffs. In the absorbent body 4 of the pad 4 ′, 9 is an absorbent body ventral side portion, 10 and 11 are absorbent body crotch portions, and 12 is an absorbent body back side portion.

In the absorbent pad 4 ', as the top sheet, non-woven cloth, cloth, porous film or the like is preferably used. As the back sheet, a synthetic resin film such as a polyethylene film is preferably used. Absorber 4
As the material, conventionally known materials such as pulp, highly liquid-absorbent polymer, and crepe paper are used alone or in combination. The absorber 4 may have various shapes such as a rectangular shape, a band shape, a rectangular shape with a narrowed intermediate portion, or a band shape.

The absorbent pad 4'has standing cuffs 7 and 8 along its left and right end edges, the free portion of which is inclined and raised toward the wearer's legs in the use state.
The free portion of the standing cuff means a standing portion (a portion having a length d in FIG. 5) standing up from the base end portions on both the left and right sides of the absorbent pad. The cuff free portion is positioned so as not to abut on the absorbent body 4 in the lying state. In addition, the free portion is the absorber 4 as shown in FIG.
It may be configured so as not to come into pressure contact with the thickest part.
This standing cuff includes a liquid-impermeable sheet and an elastic member attached to the tip portion thereof, preferably, the liquid-impermeable sheet is sandwiched between two non-woven cloth sheets, and further the tip thereof is The stretchable member is sandwiched between the parts. When the diaper is worn, the standing cuffs stand up along side edges of the absorbent pad 4 ', that is, along the wearer's legs, and both side edges of the absorbent pad 4'. Prevents liquid leakage from the outside. In FIG.
The perspective view of the center side end part of the absorbent pad 4'shown in FIG. 4 is shown, and FIG. 5 shows the XX 'sectional view in FIG. In FIG. 5, 21 is an absorber (4), 22 to 27 are absorber pads 4'of the absorber 4, 22 is a liquid-permeable top sheet,
23 is a liquid impermeable back sheet, and 24 and 25 are crepe papers. 7 indicates standing cuffs, 26 and 27 indicate non-woven cloth, and 28 and 29 indicate elastic members. A indicates an outer layer sheet composed of two non-woven cloths 30 and 31.

Topsheet 2 in absorber pad 4 '
2 and the back sheet 23 are laminated and bonded at their peripheral end portions. In the standing cuffs 7, the non-woven cloth 2
The lower ends of 6, 27 are laminated and adhered to the lower surface of the crepe paper 25. The upper ends of the non-woven fabrics 26 and 27 are continuously provided (that is, the non-woven fabrics 26 and 27 are formed by folding one non-woven fabric) or laminated and bonded.

In the absorbent pad 4'having the standing cuffs 7 shown in FIG. 5, the free portion (the portion having the length d) of the standing cuffs 7 is located at the longitudinal front and rear ends of the absorbent pad. The pad is fixed on the absorbent pad so as to face the center side in the width direction of the pad. A paper diaper having such a pad can be folded not only vertically but also from both sides. Then, when folded from both sides, the free portion of the cuff is pressed against the upper surface of the absorbent pad 4 ', but in this case, the tip of the free portion of the cuff in the crotch portion of the diaper is in a collapsed state. , Which is positioned so as to be pressed onto the absorber 4. Further, the free portion may be configured so as not to come into pressure contact with the thickest portion of the absorber 4 as shown in FIG. The absorbent pad 4'has an overlapping portion B of the top sheet 22 and the back sheet 23 where the absorbent body does not exist along both side edges in the crotch part of the paper diaper. Length c of overlapping portion B at 10 and 11
Is longer than the length of the width of the free portion of the standing cuff 7 (the distance from the contact position with the tip of the topsheet 22 to the tip position of the standing cuff in FIG. 5) d, and the overlapping portion B
The ratio d / c of the width length d of the free portion of the standing cuff to the width length c of 0.03 to 1.0, preferably 0.1.
It is 5 to 1.0. That is, when the free portion of the standing cuff is pressed downward and brought into pressure contact with the pad surface, the tip of the free portion does not overlap the upper surface of the thick absorber 21 of the crotch having a large thickness, and the thin sheet It overlaps with the upper surface of the overlapping portion B. As a result, when the paper diaper is folded and compressed and packed, the free portion of the standing cuffs 7 does not overlap the upper surface of the crotch portion of the absorbent body, so that it is possible to avoid an increase in the folding thickness of the paper diaper. Since both end portions of the crotch portion of the absorbent body 21 are not compressed through their free portions, the liquid absorbing ability of the both end portions of the crotch portion of the absorbent body 21 is prevented from being lowered, and the standing cuffs are provided. Is also prevented from deformation.
The thickness e of the absorber 4 in the crotch is usually 1.0 to 6
It is 0 mm, preferably about 5 to 40 mm.

The length of the underpants diaper extending to the crotch portions 14 and 15 and the length L ₁ from the lengthwise end of the absorbent body 4 to 14 and 15 are usually 150 to 350 mm, preferably 20.
It is about 0 to 300 mm. The length L ₂ of the upper part of the pants, that is, the length L ₂ from the absorber to the upper waist openings 13 and 16 is the ratio L ₂ / L ₁ to the length L ₁ of the upper part of the diaper.
Is in the range of 0.2 to 0.9, preferably 0.25 to 0.75 (see FIGS. 1 and 3).

In FIG. 3, the lateral length a ² of the central portion of the paper diaper located between the line f and the line g is usually 50 to 3.
It is 00 mm, preferably 100 to 250 mm. In addition, the length a of the end portion on the side of the diaper located outside the lines f and g
¹ , a ³ is usually 75 to 400 mm, preferably 225
~ 380 mm. Ratio of a ¹ or a ³ to a ² a ¹ /
It is preferable that a ² or a ³ / a ² is set in the range of 0.25 to 8.0, preferably 0.3 to 4.0.

In the absorbent pad 4 ', the absorbent body 4
The length b ¹ of the ventral side portion 9 is 20 to 300 mm, preferably 50 to 250 mm. Length b of the back part 12 of the absorber
⁴ is 20 to 300 mm, preferably 50 to 250 mm
Is. The length b ² of the crotch portion 10 of the absorber 4 is 0 to 200.
mm, preferably 10 to 125 mm. The length b ³ of the crotch portion 11 of the absorbent body 4 is 0 to 200 mm, preferably 10 to 125 mm. Further, it is preferable to adopt the optimum one from the known absorbent body shapes as shown in FIGS. 6 to 8 depending on the body shape and sex of the user.

In the paper diaper used in the present invention, the sheet having the structure shown in FIG. 3 is folded back along the center line k and is joined along the peripheral edges of the paper diaper upper portions 13 and 16. It can be manufactured.

The shape of the absorber used in the present invention can be various shapes other than that shown in FIG. Examples thereof are shown in FIGS. The absorber 4 (2) shown in FIG.
The back side of the liquid absorber is elongated.

The absorber 4 (3) shown in FIG. 7 has a shape in which the back side of the liquid absorber is strip-shaped and elongated. The absorber 4 (4) shown in FIG. 8 has a gourd shape as a whole.

In the present invention, the structure of the absorbent pad having the standing cuffs can be various shapes other than that shown in FIG. Examples thereof are shown in FIGS. 9 to 11.

In the structure shown in FIG. 9, the absorbers are the upper absorber 21 and the lower absorber 21 (2).
In FIG. 9, 7 indicates a standing cuff and d indicates the length of its free portion. When the free portion of the standing cuff is brought into pressure contact with the pad surface, its tip does not come into pressure contact with the surface of the absorbent body 21 above it.

In the structure shown in FIG. 10, the free standing cuffs have a length d from the base end toward the center of the absorbent pad, and a length at which the free cuffs are folded back to the outside. m
And a hit portion. The upright portions are fixed on the absorbent pad 41 in a state of facing the widthwise center side of the absorbent pad 41 at the longitudinal front and rear ends of the absorbent pad 41, and the corresponding ribs are folded back. It is fixed on the upright portion. The tip of the standing portion of the standing cuff does not come into pressure contact with the surface of the absorber 21.

In the structure shown in FIG. 11, the free portion is
The absorbent pad is fixed on the absorbent pad at the front and rear ends in the longitudinal direction of the absorbent pad so as to extend outward in the width direction of the absorbent pad. The free end is
It is located inside the widthwise end edge of the absorbent pad.

In the present invention, the paper diaper is folded so that the upper portions 13 and 16 of the paper diaper overlap the abdomen 9 or the back 12 of the absorbent body 4, and a plurality of them (usually,
5 to 80 pieces, preferably 9 to 45 pieces are compressed and packed with a wrapping material. When folding a paper diaper, the upper part of the paper diaper is a liquid absorption pad 4'to obtain a compact folded product.
It is preferable to fold the line h along the upper edge of the absorbent body 4 at the position avoiding the absorbent body 4 as a folding line (FIG. 1).
reference). In addition, it is preferable to fold both side ends of the disposable diaper with the lines f and g along the side edge of the absorbent body 4 in the absorbent body pad 4 ′ as folding lines (see FIG. 1). The folding in this case may be performed on either the ventral side or the back side of the absorbent body 4.

FIG. 12 shows a disposable diaper, which is shown in FIG.
An explanatory view for obtaining a paper diaper folded product obtained by folding along a line h after folding along a line g is shown. 12, (a) is an unfolded paper diaper, (b) is a view in which both sides of the paper diaper are folded, and (c) is an appearance of a folded paper diaper formed by further folding the paper diaper up and down. The figure is shown.

In FIG. 13, a plurality of folded diaper pieces are compressed.
The explanatory view of the packaged paper diaper packaged product is shown. This figure smells
, 41 to 46 are folded diapers, and 47 is a package.
Indicates the material. The folded paper diapers 41 to 46 are
Compressed in the lateral direction and compressed in this packaged state
The rate is 10 to 80%, preferably 30 to 60%. This
The compression ratio in the case of is expressed by the following formula. Compression rate = (W₀-W₁) / W₀× 100 (%) W₀= Wrap multiple diaper folds without pressure
All packaging when Indicates the width. W₁= Wrapped multiple folded paper diapers in a compressed state
Of the whole package when Indicates width (see Figure 13)
You Standing cuffs can be made by compressing and packing a paper diaper.
The free part of is not strongly compressed. As a result,
The expansion and contraction force of the expansion and contraction member attached to the free part of the
Even after compression packing for a long time without being damaged, the paper diaper
The standing cuffs do not compromise the leakproof performance and are comfortable to wear
can do. The elastic member of the standing cuff is non-woven fabric, etc.
Is adhered to the sheet base material of
However, if a strong compression state continues for a long time (about 1 month),
It is possible to prevent the stretching force from being impaired.

[0026]

The folded paper diaper according to the present invention has a thin crotch portion because there are no standing cuffs on the upper surface of the absorbent body, and moreover, the crotch portion of the absorbent body (the crotch portion) is required to have liquid absorbing ability. Since the upper part and the side end part of the paper diaper are not laminated on the surface of (1), the thickness of the crotch part can be reduced accordingly. As a result, even if the paper diaper is compressed and packed and stored for a long time and then taken out from the packing bag, the absorbent material in the crotch area of the paper diaper is not strongly compressed, and the liquid absorption performance does not deteriorate. can do. The absorber is
When it is strongly compressed, the voids that absorb the liquid are crushed and the absorption rate is reduced, but in the case of the present invention, as described above, the absorber of the crotch is not strongly compressed, so the voids are not crushed. Therefore, it is possible to prevent the liquid absorption ability from being disturbed.

[Brief description of drawings]

FIG. 1 shows a schematic diagram of an example of a disposable diaper.

FIG. 2 shows a perspective view of one example of a disposable paper diaper.

FIG. 3 shows an exploded view of one example of a disposable paper diaper.

FIG. 4 is a perspective view of a side end portion of the absorbent pad shown in FIG.

5 is a cross-sectional view taken along the line X-X 'in FIG.

FIG. 6 shows a shape explanatory diagram for one example of an absorber.

FIG. 7 is a shape explanatory view of another example of the absorber.

FIG. 8 shows a shape explanatory view of still another example of the absorber.

FIG. 9 is a structural explanatory view of an example of an absorbent pad having standing cuffs.

FIG. 10 is a structural explanatory view of another example of the absorbent pad having standing cuffs.

FIG. 11 is a structural explanatory view of still another example of the absorbent pad having standing cuffs.

FIG. 12 shows an explanatory view for obtaining a disposable disposable diaper folded product.

FIG. 13 shows an explanatory diagram of a paper diaper packaged product obtained by compressing and packaging a plurality of folded paper diaper products.

[Explanation of symbols]

1 waist A few legs 4 absorber 4'absorber pad 7,8 Standing cuffs 9 Absorbent ventral part 10, 11 Absorber crotch 12 Absorber back side 13, 16 Paper diaper top 14,15 Lower part of paper diaper 41-46 Paper diaper folding product 47 Packaging

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[Procedure amendment]

[Submission date] September 21, 2001 (2001.9.2)
1)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

The length L ₁ from the bottom of the diaper , from the end of the absorbent body 4 in the lengthwise direction to 14, 15 is usually 150 to 35.
It is 0 mm, preferably about 200 to 300 mm. Waist openings 13, 1 above it, ie above the absorber
The length L _{2 of the} pants upper part reaching 6 is such that the ratio L ₂ / L ₁ to the length L ₁ of the upper part of the diaper is in the range of 0.2 to 0.9, preferably 0.25 to 0.75. Such a length (see FIGS. 1 and 3).

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

In the absorbent pad 4 ', the absorbent body 4
The length b ¹ of the ventral side portion 9 is 20 to 300 mm, preferably 50 to 250 mm. Length b ⁴ of the back side 12 of the absorber
Is 20 to 300 mm, preferably 50 to 250 mm. Length b ² of the crotch portion 10 of the absorber 4 is 0 to 200 m
m, preferably 10 to 125 mm. The length b ³ of the crotch portion 11 of the absorbent body 4 is 0 to 200 mm, preferably 1
It is 0 to 125 mm. Further, it is preferable to adopt the optimum one from the known absorbent body shapes as shown in FIGS. 6 to 8 depending on the body shape and sex of the user.

Continued front page    (72) Inventor Atsuko Shirai             Tochigi Prefecture Shioya-gun Kitsuregawa-cho Large character Washishuku character Kannosawa             4776 Address 4 Elleair Paper Tech Co., Ltd.             Inside the company F-term (reference) 3B029 BD11 BD14                 3E068 AA22 AB02 AC05 BB12 CC26                       DD28 DE01 EE11 EE40

Claims (7)

[Claims] 1. A disposable diaper having a waist opening and a pair of leg openings, and comprising a top sheet, a back sheet, and an absorber disposed between these sheets,
The disposable paper diaper has a ratio L ₂ / L ₂ of the pants length L ₁ from the lengthwise end of the absorber to the crotch part and the pants length L ₂ from the absorber to the upper waist opening. L ₁
Is formed to fall within the range of 0.2 to 0.9, and
Along the left and right sides of the absorbent pad having the absorbent body,
In the state of use, a standing cuff is provided which is inclined and erected toward the wearer's leg, and a free portion which is inclined and erected toward the leg of the standing cuff is in a lying state so as not to be pressed against the absorber. Disposable paper diapers characterized by that. 2. The absorbent part is fixed on the absorbent pad at a front-rear end in the longitudinal direction of the absorbent pad so as to be directed toward a center side in the width direction of the absorbent body. Disposable diapers. 3. The free portion has an upright portion that extends from the base end portion toward the center of the absorbent body, and a contact portion that folds back toward the outer side, and the upright portion is the absorbent body. At the longitudinal front and rear ends of the pad, the pad is fixed on the absorbent pad in a state of being directed toward the widthwise center side of the absorbent body, and is fixed on the upright portion in a state in which the corresponding portion is folded back. The disposable paper diaper according to 1. 4. The free portion is fixed on the absorbent body at the front and rear ends of the absorbent pad in the longitudinal direction toward the outer side in the width direction of the absorbent pad, and the free end portion of the free portion is fixed. The disposable diaper according to claim 1, wherein the disposable diaper is located inside the widthwise end edge of the absorbent body. 5. The disposable paper diaper according to any one of claims 1 to 4, wherein, in the packaged state, the folded position is folded at a position avoiding the absorbent body. 6. The packaging structure for a disposable paper diaper according to claim 5, wherein the disposable paper diaper is packaged with a plurality of packaging materials, and the disposable paper diaper and the ventral side portion of one adjacent paper diaper in an overlapping state. A packaging structure for a disposable diaper, characterized in that it is packaged with the back side of the other diaper facing. 7. A compression ratio of 10 to 80 in a packaged state.
The packaging structure for disposable diapers according to claim 6, which is in the range of%.