JP3953228B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorbent article such as a disposable diaper that is excellent in leak-proofing properties and is not stuffy when worn.
[0002]
[Prior art and problems to be solved by the invention]
In an absorbent article such as a disposable diaper, it is an important issue to effectively prevent leakage. In particular, it has been difficult to effectively prevent leakage when the excreta has a high viscosity such as loose stool.
In order to improve the leakage prevention property for soft stool etc., in Japanese Patent No. 2572744, a three-dimensional guard is formed on the periphery of the absorbent body in a disposable diaper in which an elastic member is arranged on the leg part to form a leg gather, Among such three-dimensional guards, disposable diapers are proposed in which pockets for catching excrement are formed in the front and rear, with the center portion in the longitudinal direction of the part located on the left and right sides of the absorbent body fixed in the middle in the width direction.
However, even in the disposable diaper according to such a proposal, there is a demand for an absorbent article that is still not sufficient to prevent leakage and is further excellent in leakage prevention.
[0003]
Accordingly, an object of the present invention is to provide an absorbent article having a high leakage prevention property for excrement having high viscosity such as loose stool.
[0004]
[Means for Solving the Problems]
The present invention includes a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent body, and has a substantially vertically long absorbent body, and both left and right sides of the absorbent body in the longitudinal direction. In the absorbent article provided with a pair of three-dimensional guards, leg gathers are not formed on the leg portions of the absorbent main body, and both ends of the three-dimensional guard in the longitudinal direction are the absorbent. A part between the proximal end and the free edge in the middle part in the longitudinal direction is fixed to the absorbent main body, and the solid guard and the absorbent main body capture excrement. And a gather is formed in the longitudinal direction of the absorbent main body, and a plurality of the three-dimensional guard elastic members are arranged between the base end and the free edge of the three-dimensional guard. The three-dimensional guard has both longitudinal ends. Each of the three-dimensional guard has a pair of edge fixing portions formed by being fixed to the absorbent main body in the vicinity of the side edge on the inner side in the absorbent article width direction, and a longitudinal intermediate portion thereof includes a plurality of the three-dimensional solids. A center fixing portion formed by being fixed to the absorbent main body at a position where a three-dimensional guard elastic member located in the middle of the guard elastic members is disposed, and a pair of the edge fixing portions and the pair of edge fixing portions The center fixing portion is formed by extending a pair of openings of the cavity portion in an oblique direction with respect to the longitudinal direction of the absorbent article between each of the pair of edge fixing portions and the center fixing portion. The above object is achieved by providing an absorbent article formed as described above.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, one preferred embodiment of the absorbent article of the present invention will be described.
As shown in FIGS. 1 to 3, the disposable diaper 1 as an absorbent article of the present embodiment includes a liquid-permeable surface sheet 2, a liquid-impermeable leak-proof sheet 3, and a liquid-retaining absorbent body 4. And a substantially vertically long absorbent main body 10 and a pair of three-dimensional guards 6 provided on both left and right sides of the absorbent main body 10 in the longitudinal direction.
[0006]
The disposable diaper 1 of the present embodiment is configured such that the absorbent body 4 is sandwiched and fixed by the top sheet 2 and the leak-proof sheet 3, and the top sheet 2 and the leak-proof sheet 3 are separated from the left and right edges in the longitudinal direction of the absorbent body 4. A pair of left and right leg portions 7 that are extended and abut around the legs of the wearer when worn are formed.
In addition, a waist elastic member 81 is disposed in each of the waist openings 8 in the abdominal side A located on the wearer's abdomen side and the back side B located on the dorsal side at the time of wearing, and waist gathers are formed respectively. ing. Fastening tapes 11 for wearing disposable diapers are respectively provided on the left and right side edges B1, B2 of the back side B.
The three-dimensional guards 6 are each formed by arranging a strip-shaped sheet material 61 from the waist opening edge 82A on the abdomen side to the waist opening edge 82B on the back side. The sheet material 61 has a longitudinal edge fixed to the surface sheet 2 on the side of the waist opening 8, and a longitudinal edge 6 c bonded and fixed to the leak-proof sheet 3 at the leg 7. ing. Therefore, the base end 60 of the three-dimensional guard 6 is located on the leak-proof sheet 3 in the leg portion 7.
[0007]
Thus, in the disposable diaper 1 of the present embodiment, leg gathers 7 are not formed on the pair of left and right leg portions 7 of the absorbent main body 10, and the solid guard 6 has both longitudinal end edges 6a. While being fixed to the absorptive main body 10, a part between the base end 60 and the free edge 63 in the longitudinal direction intermediate part 6b is fixed to the absorptive main body 10, and the three-dimensional guard 6 and the absorptive main body 10 A cavity 9 for capturing excrement is formed, and a gather is formed in the longitudinal direction of the absorbent main body 10.
[0008]
More specifically, in the disposable diaper 1 of the present embodiment, the leg portion 7 of the absorbent main body 10 is formed so that the leg gathers are not formed on the leg portion 7 that contacts the leg of the wearer in the absorbent main body 10. The elastic sheet is not given elasticity to the surface sheet 2 and the leak-proof sheet 3 to be performed. That is, no elastic member or the like is provided.
The term “abut” includes both the case where the absorbent main body directly hits the wearer's skin and the case where the absorbent main body hits indirectly such as through a sheet material for forming a three-dimensional guard as in this embodiment. It is.
[0009]
The sheet material 61 for forming a three-dimensional guard is bonded to the absorbent main body 10 at the outer edge 6c and both longitudinal edges 6a ′. Further, the central fixing portion 66 formed by being fixed in the above-described intermediate portion 6 b in the longitudinal direction is located at the substantially central portion in the width direction at the substantially central portion in the longitudinal direction of the sheet material 61. In addition, the pair of edge fixing portions 67 formed by being fixed at the longitudinal edge portion 6a is positioned in the vicinity of the side edge on the inner side in the width direction on the end portion side in the longitudinal direction. The longitudinal direction edge 6 a ′ is fixed to the absorbent main body 10 on all sides.
Thus, a pair of openings 90 formed by the three-dimensional guard 6 and the surface sheet 2 of the absorbent main body 10 are formed between the center fixing portion 66 and the edge fixing portion 67, and the cavity portion 9 is One is formed so as to connect the pair of openings 90.
[0010]
The central fixing portion 66 is formed by fixing a portion where a three-dimensional guard elastic member 64 (described later) arranged second from the outside in the width direction of the diaper is fixed to the absorbent main body 10. Thereby, the opening part 90 is formed so that it may become a diagonal direction with respect to the longitudinal direction of a diaper. The hollow portion 9 is fixed to the absorbent main body 10, and has a widthwise side edge 6 c and a longitudinal end edge 6 a ′ on the outer side of the diaper of the sheet material 61 as a peripheral edge, and a central fixed portion 66 and an edge fixed The opening 90 formed by the portion 67 is formed so that the excretion collecting port functions.
[0011]
The length of the central fixing portion 66 is preferably 5 to 100 mm, is linear, and the width is preferably 2 to 50 mm.
The length of the edge fixing portion 67 is preferably 10 to 200 mm, is linear, and the width is preferably 2 to 100 mm.
And it is preferable that the length of the opening part 90 shall be 30-200 mm. In the present embodiment, the pair of openings 90 are respectively formed at the target positions and have the same length.
Moreover, the cavity part 9 is formed so that the volume of a natural state (state which contracted each elastic member naturally without applying external force to a disposable diaper) will be 10-1000 cm < ³ >.
[0012]
The gathers in the three-dimensional guard 6 are formed by elastic portions 65 formed from the free edge to the proximal direction. The elastic portion 65 is formed by arranging a plurality of string-like three-dimensional guard elastic members 64 on the three-dimensional guard 6.
The three-dimensional guard elastic member 64 is arranged on the free edge 63 of the three-dimensional guard 6, and a plurality of three-dimensional guard elastic members 64 are provided between the base end 60 and the free edge 63 of the three-dimensional guard 6 with a predetermined interval between them. It is arranged along the free edge 63. In FIG. 1, for the convenience of illustrating the three-dimensional guard 6 forming the gathers, the elastic member is illustrated as being curved, but in the present embodiment, it is arranged in a straight line.
[0013]
One three-dimensional guard elastic member 64 is arranged at the free edge 63 and four between the free edge 63 and the base 60. Each three-dimensional guard elastic member 64 is nipped and fixed via an adhesive by a sheet material 61 folded back at the free edge 63. Each solid guard elastic member 64 is arranged in parallel with the free edge 63 and along the longitudinal direction of the diaper.
Moreover, it is preferable that the space | interval between each solid guard elastic member 64 shall be 2-50 mm, and it is preferable that the width | variety of the elastic part 65 shall be 10-150 mm.
[0014]
The stress of the three-dimensional guard elastic member 64 is preferably 10 gf to 1000 gf.
Here, the “stress” can be measured as follows.
The elastic member was cut into a length of 150 mm, and a tensile test was performed at a distance between chucks of 100 mm and a pulling speed of 300 mm / min using a Tensilon tensile tester (manufactured by Orientec Co., Ltd.), and the stress at 100% elongation was measured. .
[0015]
Next, the formation material of each member which comprises the disposable diaper 1 of this embodiment is demonstrated.
As a forming material of the said surface sheet 2, the said leak-proof sheet 3, the said absorber 4, the said waist part elastic member 81, and the said fastening tape 11, what is normally used for a disposable diaper can be especially used without a restriction | limiting.
[0016]
The sheet material 61 is preferably a breathable sheet, and its air permeability is preferably 500 sec / 100 cc or less, and more preferably 100 sec / 100 cc or less. By setting the air permeability to 500 sec / 100 cc or less, the ventilation effect is good, the inside of the diaper is not stuffy when worn, and adverse effects on the wearer's skin such as fogging are reduced.
The water pressure resistance (water repellency) of the sheet material 61 is preferably 3.0 g / cm ² or more, and more preferably 5.0 g / cm ² or more. By setting the water pressure resistance to 3.0 g / cm ² or more, the excretion of the excrement is small and the leakage preventing effect is enhanced.
As a material for forming the sheet material 61 satisfying such conditions, spunbond, thermal bond, spunbond-meltblown nonwoven fabric (SM), spunbond-meltblown-spunbond nonwoven fabric (SMS), spunbond-meltblown-meltblown- Spunbond nonwoven fabric (SMMS), heat roll, air through, melt blown, spunlace nonwoven fabric and the like can be mentioned.
[0017]
Here, the air permeability and the water pressure resistance are measured as follows.
[Air permeability]
It measured according to JIS-P8117. That is, the sheet was cut into a size of 70 × 70 mm, and the time required for 100 ml of air to permeate was measured using an air permeability measuring device (Oken air permeability measuring device).
(Water pressure resistance)
It measured according to JIS-L1092.
[0018]
The three-dimensional guard elastic member 64 is not particularly limited, and a conventionally known elastic member can be used without limitation. Note that the three-dimensional guard elastic member and the other three-dimensional guard elastic member arranged at the free edge may be made of different materials in order to make the stresses different from each other, or even if the expansion rate is changed with the same material. good.
[0019]
The disposable diaper 1 of this embodiment can be used similarly to a normal unfolded disposable diaper.
And since the hollow part 9 functions as a collection pocket of excrement, the disposable diaper 1 of this embodiment is improved in leak-proofing property for viscous excrement such as loose stool.
Also, as in the present embodiment, the case of forming the central solid attachment part 66 by fixing the three-dimensional guard 6 at a position where the elastic member arranged to be located in the middle of the plurality of three-dimensional guard elastic members 64, further solid Since the standing property of the guard 6 is improved and a good barrier can be formed, in addition to the function of the pocket, it can also have a barrier (three-dimensional guard) function with improved function against viscous excrement such as loose stool, Leak prevention is further improved. Further, such an effect is particularly remarkable when the center fixing portion 66 and the edge fixing portion 67 are formed so that the opening is formed obliquely with respect to the longitudinal direction of the disposable diaper as in the present embodiment. It is.
[0020]
The disposable diaper according to the present embodiment fixes the absorbent body and the waist elastic member between the leakproof sheet and the top sheet according to a conventional method, and then fixes the sheet material on which the three-dimensional guard elastic member is disposed at a predetermined position. Is obtained.
[0021]
In the above description of the embodiment, the base end of the three-dimensional guard is illustrated at the leg portion, that is, the base that is not on the absorber, but the base end is positioned on the absorber. Also good.
The elastic portion may be formed by using a sheet-like elastic material without using the string-like three-dimensional guard elastic member, or the sheet material itself may be an elastic sheet.
Further, the stress of the three-dimensional guard elastic member arranged at the free edge may be made larger than that of the other elastic members by arranging a plurality of elastic members on the free edge. Moreover, in the above-mentioned embodiment, although demonstrated and demonstrated the deployment-type disposable diaper, this invention is not restrict | limited to this, Furthermore, it applies to a pants-type disposable diaper, an incontinence pad, a sanitary napkin, etc. it can.
[0022]
A three-dimensional guard provided with a three-dimensional guard elastic member may be formed on both sides or either one of the back side and the ventral side to prevent leakage from the waist.
The three-dimensional guard or the elastic member arranged on the three-dimensional guard may be curved and the end of the elastic member arranged on the three-dimensional guard or the three-dimensional guard may be adjacent to the support portion of the tape fastener.
A liquid-impermeable film may be laminated on a part between the base end portion of the solid guard and the free edge. In this case, exudation of excrement from the three-dimensional guard can be more effectively prevented, and the leakage prevention effect is further improved.
The three-dimensional guard itself may be stretchable.
A water-repellent mount, a nonwoven fabric, and a liquid-impermeable film may be used as the material constituting the absorber, and these materials may cover the lower part and the side part of the absorber. In this case, it is effective to prevent excrement once absorbed by the wearer's body pressure from seeping out from the absorber.
Further, the leg portion is configured to prevent the leakage preventing sheet from extending outward from the side edge of the absorbent body up to the base end portion of the solid guard or the side edge of the absorbent body. You may form with the outer-layer nonwoven fabric distribute | arranged to the surface of the leakage sheet. In this case, the left and right side portions of the disposable diaper are more breathable, and the effect of preventing stuffiness is further improved. In this case, the strength of the sheet material 61 in the CD direction is preferably 1000 cN / 50 mm or more, and more preferably 1200 cN / 50 mm or more. By setting the strength to 1000 cN / 50 mm or more, it is less likely that the fit of the disposable diaper is reduced by breaking the material at or around the portion where the force is applied to the sheet material during mounting.
[0023]
【The invention's effect】
The absorbent article of the present invention has a high leak-proofing property for excrement having high viscosity such as loose stool.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a surface sheet side in a free state of a disposable diaper as a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line XX in FIG.
3 is a cross-sectional view taken along line YY of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 10 Absorbent main body 11 Fastening tape 2 Top sheet 3 Leak-proof sheet 4 Absorber 6 Solid guard 60 Base end 61 Sheet material 63 Free edge 64 Solid gather elastic member 65 Elastic part 7 Leg part 8 Waist opening part 81 Waist Elastic member A ventral side B dorsal side

Claims (2)

Provided with a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent body, and a substantially vertically long absorbent main body, and provided on the left and right sides of the absorbent main body in the longitudinal direction In an absorbent article comprising a pair of three-dimensional guards,
Leg gathers are not formed on the leg part of the absorbent main body,
The three-dimensional guard is fixed to the absorbent main body at both ends in the longitudinal direction, and a part between the base end and the free edge at the intermediate portion in the longitudinal direction is fixed to the absorbent main body. A three-dimensional guard and the absorbent main body form a cavity for capturing excrement, and a gather is formed toward the longitudinal direction of the absorbent main body ,
A plurality of the three-dimensional guard elastic members are arranged between the base end and the free edge of the three-dimensional guard,
The three-dimensional guard has a pair of edge fixing portions formed by being fixed to the absorbent main body in the vicinity of the side edge on the inner side in the widthwise direction of the absorbent article in the three-dimensional guard. The longitudinal intermediate portion has a central fixing portion formed by being fixed to the absorbent main body at a position where the three-dimensional guard elastic member located in the middle of the plurality of three-dimensional guard elastic members is disposed. ,
The pair of edge adhering portions and the central adhering portion are formed between the pair of edge adhering portions and the central adhering portion, and the pair of openings of the cavity portion are arranged in the longitudinal direction of the absorbent article. The absorbent article is formed so as to extend in an oblique direction .   The absorbent article according to claim 1, wherein the three-dimensional guard elastic member is disposed at a free edge of the three-dimensional guard.

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