JP3884624B2 - Disposable diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable diaper that absorbs and holds excrement.
[0002]
[Prior art]
A liquid-absorbent core is interposed between the liquid-permeable top sheet and the liquid-impervious back sheet, the front waist region and the back waist region in the longitudinal direction, and a crotch region located between these waist regions A disposable diaper having a stool retaining recess that is recessed in the thickness direction of the core is known.
[0003]
As an example of such, JP-A-8-191857 includes an upper layer core having an opening penetrating in the crotch region in the thickness direction, and a lower layer core positioned below the upper layer core to block the opening, Disclosed is a disposable diaper in which a concave part for holding stool is formed by these cores, and a hydrophilic nonwoven fabric interposed between the cores is looked into the concave part. As another example, Japanese Utility Model Laid-Open No. 6-5614 discloses a disposable diaper in which a core has a recess for holding stool that is recessed from the top surface in the thickness direction, and the recess expands in an inversely tapered shape from the opening surface toward the bottom surface. Is disclosed.
[0004]
[Problems to be solved by the invention]
The diapers disclosed in these publications have a small stool storage volume in the recess and can accommodate a small amount of stool in the recess, but if a large amount of stool is excreted at a time, the recess cannot fully accommodate it, Overflowing stool adheres to the wearer's skin. Moreover, if a wearer's body pressure is applied to the thickness direction downward from the upper part of a core, a core will be crushed and the stool accommodation volume of a recessed part will become still smaller than the state before wear.
[0005]
An object of the present invention is to provide a disposable wearing article in which stool is accommodated in a bag having a large stool storage volume, and adhesion of stool to the wearer's skin can be reliably prevented.
[0006]
[Means for Solving the Problems]
The premise of the present invention to solve the above problems is between a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and the front and back sheets. The front waist area and the back waist area are formed in the longitudinal direction, the front waist area and the back waist area are formed in the longitudinal direction. A disposable diaper having a crotch region located between the surrounding regions.
[0007]
The feature of the present invention based on this premise is that the opening (8) penetrating the front and back sheets (10, 11) and the core (12) in the thickness direction includes the front / rear waist region (31, 33) and the crotch A laminated panel (9 ) formed between at least the side edges (1b) in the crotch region with the region (32) and having a skin contact surface for accommodating stool covered with a liquid-permeable sheet (10) ') the formed bag (9) is attached to the non-skin contact side of the diaper so as to be opposed to the opening (8),
The said bag (9) is the said 1st end part dented toward the inside of a vertical direction among the peripheral parts of the laminated panel (9 ') which has the 1st end (9a) and the 2nd end (9b ) of the other side. In the part (20 ) which is (9a) , both sides in the vicinity of the vertical center line (Z) of the panel are joined so that the liquid-permeable sheets (10) are in contact with each other, and the vertical center line (Z) is the center. The first to fourth bent portions (16, 17, 27, 28) extending so that the distance gradually increases from the first end (9a) to the second end (9b) at the portions separated to the outer sides. ) , Bend inwardly facing each other via the first bent portion (16) and the third bent portion (27) , and further, the second bent portion (17) and the fourth bent portion bent portion via (28) is formed by folding outward, the watertight near the peripheral edge of said opening (8) Lies in that they are wearing.
[0008]
As an example of an embodiment of the present invention, the stool storage volume of the bag is in the range of ³⁰ to 10,000 cm ³ .
[0009]
Another preferred embodiment of this invention, liquid-impervious sheet wherein the laminated panel constituting the bag, and the liquid-pervious sheet positioned on the skin contact side, which is located non-skin contact side And a liquid-absorbent core positioned between the sheets.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The details of the disposable diaper according to the present invention will be described by taking an open diaper as an example with reference to the accompanying drawings.
[0011]
1 and 2 are a perspective view of the diaper 1A shown from the side of the top sheet 2, and a perspective view showing the diaper 1A and the bag 9 separately. 3 and 4 are a cross-sectional view taken along line AA in FIG. 1 and a cross-sectional view taken along line BB in FIG. 1. 1 and 2, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y. In FIG. 2, the state before shaping | molding in the bag 9 is shown with a virtual line. The inner surface of the top sheet 2 and the back sheet 3 refers to the surface facing the core 4, and the outer surface of the sheets 2 and 3 refers to the surface not facing the core 4. Further, the inner surfaces of the liquid-permeable sheet 10 and the liquid-impermeable sheet 11 refer to surfaces that face the core 12, and the outer surfaces of the sheets 10 and 11 refer to surfaces that do not face the core 12.
[0012]
The diaper 1A includes a liquid-permeable surface sheet 2 located on the skin contact side, a liquid-impermeable back sheet 3 located on the skin non-contact side, and a liquid-absorbent core interposed between the sheets 2 and 3 4 and a substantially liquid-impervious leak-proof cuff 5 that has a tendency to stand up above the top sheet 2. The core 4 is bonded to the inner surfaces of the top sheet 2 and the back sheet 3.
[0013]
The diaper 1A includes a front waistline region 31 and a back waistline region 33 in the vertical direction, and a crotch region 32 positioned between the front and back waistline regions 31 and 33, and both end edges 1a extending in the horizontal direction, And both side edges 1b extending in the direction. Both side edge portions 1 b are arced inwardly in the crotch region 32.
[0014]
A band-shaped elastic member 6 for waistline extending in the lateral direction is attached to the end edge 1a of the diaper 1A in an extended state. A plurality of leg-around elastic members 7 extending in the crotch region 32 in the longitudinal direction are attached to both side edges 1b of the diaper 1A in an extended state.
[0015]
Between the both side edge portions 1b of the diaper 1A, an opening 8 that is long in the vertical direction penetrating the front and back sheets 2, 3 and the core 4 in the thickness direction is formed. The opening 8 extends from the crotch region 32 toward the front and rear waist regions 31 and 33. On the non-skin contact side of the diaper 1A, a bag 9 that is long in the vertical direction for accommodating stool is attached.
[0016]
The bag 9 includes a liquid-permeable sheet 10 located on the skin contact side, a liquid-impermeable sheet 11 located on the skin non-contact side, and a liquid-absorbent core 12 interposed between the sheets 10 and 11. A laminated panel 9 'made of The core 12 is joined to the inner surfaces of the liquid-permeable sheet 10 and the liquid-impermeable sheet 11. In the bag 9, the peripheral portions of the liquid-permeable sheet 10 and the liquid-impermeable sheet 11 that extend outward in the circumferential direction from the peripheral edge of the core 12 are fixed in a watertight manner. The bag 9 has a stool inlet 13 facing the opening 8 of the diaper 1A, a bottom 14 extending in the vertical direction below the stool inlet 13, and both sides extending in the vertical direction facing each other between the stool inlet 13 and the bottom 14 And a wall 15.
[0017]
On both side walls 15, a first bent portion 16 extends in the vertical direction on both sides of the bottom 14, and a second bent portion 17 extends in the vertical direction between the stool entrance 13 and the first bent portion 16. . Both side walls 15 are bent at the first bent portion 16 so that the inner surfaces of the liquid-permeable sheet 10 are in contact with each other, and at the second bent portion 17 so that the outer surfaces of the liquid-impermeable sheet 11 are in contact with each other. It is bent.
[0018]
The both side walls 15 have a first portion 18 extending in the vertical direction between the first bent portion 16 and the second bent portion 17, and a vertical direction between the second bent portion 17 and the stool entrance 13. An extending second portion 19 is defined. On both side walls 15, the first portion 18 is lying inward in the lateral direction of the diaper 1 </ b> A, and the second portion 19 is lying down laterally outward in the diaper 1 </ b> A. Between the second portions 19, the bottom 14 of the bag 9 is exposed.
[0019]
In order to form the bag 9 from INDICATED are laminated panel 9 'in phantom in FIG. 2, of the peripheral portion of the laminated panel 9' having a first end 9a and a second end 9b of the opposite side, in the longitudinal direction In the portion 20 that is the first end portion 9a that is recessed toward the side, both side portions in the vicinity of the vertical center line Z of the panel are joined so that the liquid-permeable sheets 10 come into contact with each other. The first and second bent portions 16 and 17 extend so that the distance gradually increases from the first end 9a to the second end 9b at the portion spaced outward. Are bent inwardly facing each other, and further bent outwardly via the second bent part 17.
[0020]
In the diaper 1 </ b> A, the outer surface of the back sheet 3 extending in the vicinity of the periphery of the opening 8 and the outer surface of the liquid-permeable sheet 10 extending in the vicinity of the periphery of the stool inlet 13 are fixed in a watertight manner. Adhesion between the diaper 1A and the bag 9 uses a hot melt adhesive. For fixing the diaper 1 </ b> A and the bag 9, heat welding means such as heat sealing or ultrasonic bonding can be used.
[0021]
The bag 9 has a stool storage volume in the range of ³⁰ to 10,000 cm ³ . If the accommodation volume is less than 30 cm ³ , the bag 9 may not be able to accommodate the stool when a large amount of stool is excreted. When the storage volume exceeds 10,000 cm ³ , the bag 9 becomes large and the bulky bag 9 comes into contact with the wearer's crotch portion, so that there is an uncomfortable feeling when the diaper 1A is worn.
[0022]
In the diaper 1 </ b> A, the tape fastener 21 is attached to both side edges 1 b of the rear waist region 33, and the target tape 22 serving as a fastening region of the tape fastener 21 is attached to the outer surface of the back sheet 3 in the front waist region 31. Yes.
[0023]
The tape fastener 21 has a base end portion fixed to both side edge portions 1 b of the rear waist region 33 and a free end portion detachably fastened to the target tape 22. A hook member (not shown) of the mechanical fastener is attached to the free end portion of the tape fastener 21. The free end is bent toward the outer surface side of the top sheet 2 and is temporarily attached to the sheet 2. The target tape 22 is formed of a loop member that detachably fastens the hook member.
[0024]
The cuff 5 extends in the longitudinal direction at both side edges 1b of the diaper 1A. The cuff 5 includes a fixed edge portion 5a extending in the vertical direction in the vicinity of the outer sides of both side edges 4b of the core 4, a free edge portion 5b extending in the vertical direction in parallel with the fixed edge portion 5a, and front and rear waist regions 31 and 33. It has a fixed both ends 5c which are located and fall down inward in the lateral direction of the diaper 1A. An elastic member 23 extending in the vertical direction is attached to the free edge 5b in an extended state. The elastic member 23 is covered by a part of the free edge 5b.
[0025]
In the cuff 5, the side portion 5 d extends laterally outward from the fixed edge portion 5 a. The cuff 5 has a fixed edge portion 5a fixed to both side edge portions 1b of the diaper 1A, and a fixed both end portion 5c fixed to both end edge portions 1a of the diaper 1A.
[0026]
In the diaper 1 </ b> A, it is curved in the vertical direction with the top sheet 2 inside, the cuff 5 contracts in the vertical direction, and the free edge 5 b stands up above the top sheet 2. In the diaper 1 </ b> A, the free edge 5 b of the standing cuff 5 forms a barrier against excrement, and the excrement leaks from the side edges 1 b in the crotch region 32 can be prevented.
[0027]
At both end edges 1a of the diaper 1A, the end 2a of the top sheet 2 and the end 3a of the back sheet 3 extend from the both end edges 4a of the core 4 outward in the vertical direction, and the ends 2a and 3a overlap each other. Is fixed. The fixed both ends 5 c of the cuff 5 are fixed to the end 2 a of the top sheet 2. The waist elastic member 6 is interposed between the end 2a of the top sheet 2 and the end 3a of the back sheet 3, and is fixed to the ends 2a, 3a.
[0028]
At the side edges 1b of the diaper 1A, the side 2b of the top sheet 2 slightly extends laterally outward from the side edges 4b of the core 4, and the back sheet 3 extends further laterally outward from the side 2b of the top sheet 2. The side part 3b and the side part 5d of the cuff 5 extend. The side portion 2b and the side portion 3b are fixed to the overlapping portions of the side portions 2b and 3b. The side portion 3b and the side portion 5d are fixed to the overlapping portions of the side portions 3b and 5d. The fixed edge portion 5 a of the cuff 5 is fixed to the side portion 2 b of the top sheet 2. The leg-around elastic member 7 is interposed between the side portion 3b of the back sheet 3 and the side portion 5d of the cuff 5, and is fixed to the side portions 3b and 5d.
[0029]
FIG. 5 is a cross-sectional perspective view of the diaper 1 </ b> A of FIG. 1 in a worn state in which the front and rear waist regions 31 and 33 are connected, and shows the stool 26 accommodated in the bag 9. In order to wear the diaper 1 </ b> A, both side edges 1 b of the rear waistline region 33 are overlapped on the outside of both side edges 1 b of the front waistline region 31, and the free end of the tape fastener 21 is fastened to the target tape 22. . In the diaper 1 </ b> A in which the front and rear waist areas 31 and 33 are connected, a waist opening 24 and a leg opening 25 are defined.
[0030]
In the diaper 1A, since the stool 26 excreted during wearing is accommodated in the bag 9 through the stool entrance 13, the stool does not remain on the top sheet 2, and the stool 26 against the wearer's skin Can be reliably prevented. In the stool 26 accommodated in the bag 9, the moisture is absorbed and held in the core 12, and the solid content remains in the bag 9.
[0031]
In the diaper 1A, both side walls 15 of the bag 9 are folded back at the first bent portion 16 and the second bent portion 17 by the mass of the stool 26, and the both side walls 15 extend downward from the diaper 1A. In the diaper 1 </ b> A, the bottom 14 of the bag 9 is spaced downward from the opening 8 of the diaper 1 </ b> A as compared to before excretion of the stool 26 shown in FIG. 3, so that the stool 26 contained in the bag 9 is kept away from the wearer's skin. Can do.
[0032]
In the state before excretion of the stool 26, both side walls 15 of the bag 9 are bent at the first bent portion 16 and the second bent portion 17, and both side walls 15 are laterally inward and laterally outward of the diaper 1A. The bag 9 does not protrude downward from the diaper 1A, and the skin of the diaper 1A is not in contact with the bag 9 when the side walls 15 of the bag 9 are not folded. The extension dimension of the bag 9 from the side downward can be reduced.
[0033]
6 and 7 are a partially broken perspective view of a diaper 1B showing another embodiment and a perspective view of the diaper 1B and the bag 9 shown separately. 8 and 9 are a cross-sectional view taken along the line CC of FIG. 6 and a cross-sectional view taken along the line DD of FIG. In FIG. 7, the state before being formed into the bag 9 is indicated by a virtual line. The diaper 1B of FIG. 6 is different from that of FIG. 1 as follows.
[0034]
On both side walls 15 of the bag 9, in addition to the first bent portion 16 and the second bent portion 17, a third bent portion 27 and a fourth bent portion 28 are provided with the stool entrance 13 and the second bent portion. It extends in the vertical direction between the portions 17. Both side walls 15 are bent at the first bent portion 16 and the second bent portion 17, and are bent at the third bent portion 27 so that the inner surfaces of the liquid-permeable sheet 10 are in contact with each other. The liquid-impervious sheet 11 is bent at the fourth bent portion 28 so that the outer surfaces are in contact with each other.
[0035]
On both side walls 15, a third portion 29 extending in the vertical direction between the second bent portion 17 and the third bent portion 27, and a vertical direction between the third bent portion 29 and the stool entrance 13 are provided. An extending fourth portion 30 is defined. In the both side walls 15, the third portion 29 lies down inward in the lateral direction of the diaper 1B, and the fourth portion 30 lies down outward in the lateral direction of the diaper 1B. Between the second portions 19, the bottom 14 of the bag 9 is exposed. The stool accommodation volume of the bag 9 in this diaper 1B is the same as that of FIG.
[0036]
In order to form the bag 9 from laminated panel 9 'is shown in phantom in FIG. 7, the vertical inward of the peripheral portion of the laminated panel 9' having a first end 9a and a second end 9b of the opposite side In the portion 20 that is the first end portion 9a that is recessed toward the side, both side portions in the vicinity of the vertical center line Z of the panel are joined so that the liquid-permeable sheets 10 come into contact with each other. The first bent portion 16 has first to fourth bent portions 16, 17, 27, 28 extending from the first end 9a toward the second end 9b so as to gradually increase in distance from each other. 16 and the third bent portion 27 are bent inwardly facing each other, and further bent outward through the second bent portion 17 and the fourth bent portion 28.
[0037]
In this diaper 1B, the outer surface of the back sheet 3 extending in the vicinity of the periphery of the opening 8 and the outer surface of the liquid-permeable sheet 10 extending in the vicinity of the periphery of the stool inlet 13 of the bag 9 are fixed in a water-tight manner, similarly to that in FIG. Yes.
[0038]
In this diaper 1B, both side walls 15 of the bag 9 are bent at the first to fourth bent portions 16, 17, 27, 28, and the both side walls 15 are folded into four. Not only can the extension dimension of the bag 9 downward from the contact side, but also the lateral dimension of the bag 9 can be reduced. In this diaper 1B, the bag 9 can be made more compact than that of FIG.
[0039]
In the illustrated diapers 1A and 1B, since the bottom 14 of the bag 9 is exposed from the opening 8, the stool 26 excreted in the bag 9 is directly accommodated in the bottom 14, and the stool 26 is pulled to the both side walls 15 of the bag 9. There is no hanging.
[0040]
For the top sheet 2 and the liquid-permeable sheet 10, a hydrophilic fiber nonwoven fabric or a plastic film having a large number of fine openings can be used. On the back sheet 3 and the liquid-impervious sheet 11, a hydrophobic fiber nonwoven fabric, a liquid-impervious plastic film, a two-layer nonwoven fabric in which a hydrophobic fiber nonwoven fabric is superimposed, and a plastic film fixed to the hydrophobic fiber nonwoven fabric. Any of the composite sheets can be used. A hydrophobic fiber nonwoven fabric can be used for the leak-proof cuff 5.
[0041]
A composite nonwoven fabric in which a back surface sheet 3, a liquid-impermeable sheet 11, and a cuff 5 are sandwiched between fiber nonwoven fabrics by a melt-blown method having high water resistance and a fiber nonwoven fabric by a spunbond method having high strength and high flexibility. Can also be used.
[0042]
As a nonwoven fabric, what was manufactured by each manufacturing method of a spunlace, a needle punch, a melt blown, a thermal bond, a spun bond, a chemical bond, and an air through can be used. As a constituent fiber of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, polyethylene / polypropylene, or core-sheath type composite fibers or parallel type composite fibers made of polyethylene / polyester can be used.
[0043]
The cores 4 and 12 are a mixture of fluff pulp and superabsorbent polymer particles, or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and are compressed to a required thickness. The cores 4 and 12 are preferably entirely covered with tissue paper in order to prevent the polymer particles from falling off or out of shape. As the polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.
[0044]
Adherence of front and back sheets 2 and 3, liquid-permeable sheet 10 and liquid-impervious sheet 11, adhesion of leak-proof cuff 5, joining of cores 4 and 12 to sheets 2, 3, 10 and 11, elastic member 6 , 7, 23 can be attached using hot melt adhesive or heat welding means such as heat sealing or ultrasonic bonding.
[0045]
The present invention can be implemented not only in an open type diaper but also in a pant type diaper in which the front and rear waist region is connected in advance.
[0046]
【The invention's effect】
According to the disposable diaper according to the present invention, since the stool excreted therein is accommodated in the bag attached to the diaper, the stool does not remain on the surface sheet, and the stool adheres to the skin of the wearer. Can be surely prevented.
[0047]
In this diaper, both side walls of the bag are folded in at least two folds extending in the vertical direction, and both side walls are folded so that they lie alternately inward and outward in the lateral direction of the diaper. Therefore, the extension dimension of the bag downward from the non-skin contact side of the diaper can be reduced.
[0048]
In addition, in this diaper, both side walls of the bag are folded back at the bent portion due to the mass of stool excreted during wearing, and both side walls extend downward from the diaper. The bottom is spaced downward from the opening of the diaper, and the stool contained in the bag can be kept away from the skin of the wearer.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a diaper shown from the side of a top sheet.
FIG. 2 is a perspective view showing a diaper and a bag separately.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
4 is a cross-sectional view taken along line BB in FIG.
5 is a perspective cross-sectional view of the diaper of FIG. 1 shown in a worn state in which front and rear waist areas are connected.
FIG. 6 is a partially cutaway perspective view of a diaper showing another embodiment.
FIG. 7 is a perspective view showing a diaper and a bag separated from each other.
8 is a cross-sectional view taken along the line CC of FIG.
9 is a cross-sectional view taken along the line DD of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1A Disposable diaper 1B Disposable diaper 1a Both-ends edge part 1b Both-sides edge part 2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 4 Liquid-absorbent core 8 Opening 9 Bag
9 ' laminated panel 10 liquid-permeable sheet 11 liquid-impervious sheet 12 liquid-absorbent core 13 stool inlet 14 bottom 15 side walls 16, 17 bent parts 27, 28 bent part 31 front waist area 32 inseam area 33 rear Waist area

Claims (3)

It is formed from a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and a liquid-absorbent core interposed between the front and back sheets. The front waist area and the rear waist area in the longitudinal direction, and a crotch area located between the front and back waist areas In disposable diapers,
An opening (8) penetrating the front and back sheets (10, 11) and the core (12) in the thickness direction has at least the inseam of the front / rear waist region (31, 33) and the crotch region (32). A bag ( 9) formed by a laminated panel (9 ') formed between the side edges (1b) in the region and having a skin contact surface for accommodating stool covered with a liquid-permeable sheet (10) ) Is attached to the skin non-contact side of the diaper so as to face the opening (8) ,
The bag (9), the first end portion which is recessed toward the longitudinal inward of the peripheral portion of the laminated panel (9 ') having a first end (9a) and an opposite second end thereof (9b) In the part (20 ) which is (9a) , both sides in the vicinity of the vertical center line (Z) of the panel are joined so that the liquid-permeable sheets (10) are in contact with each other, and the vertical center line (Z) is the center. The first to fourth bent portions (16, 17, 27, 28) extending so that the distance gradually increases from the first end (9a) to the second end (9b) at the portions separated to the outer sides. ) , Bend inwardly facing each other via the first bent portion (16) and the third bent portion (27) , and further, the second bent portion (17) and the fourth bent portion bent portion via (28) is formed by folding outward, the watertight near the peripheral edge of said opening (8) It said diaper characterized in that it is deposited. The diaper according to claim 1, wherein a stool storage volume of the bag is in a range of ³⁰ to 10,000 cm ³ .   The laminated panel constituting the bag has the liquid-permeable sheet positioned on the skin contact side, the liquid-impervious sheet positioned on the skin non-contact side, and the liquid-absorbent core positioned between the sheets The diaper of Claim 1 or Claim 2 formed from these.

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