JP4245220B2 - 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]
Conventionally, an absorbent article such as a disposable diaper in which a leg portion is constituted only by a breathable sheet so as to prevent stuffiness at the time of wearing has been proposed (Japanese Patent No. 2579365).
However, the conventionally proposed absorbent article having a leg part with excellent air permeability has a problem that excrement may leak from the leg part due to the exudation of the excrement through the air-permeable sheet. It was.
[0003]
Accordingly, an object of the present invention is to provide an absorbent article that is effectively prevented from being curled while being worn and is excellent in preventing leakage from the leg portion.
[0004]
[Means for Solving the Problems]
The present invention comprises a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent body, and a pair of leg portions are formed outward from the left and right side edges of the absorbent body. In the absorbent article in which a pair of three-dimensional guards provided with three-dimensional guard elastic members are formed on both left and right sides in the longitudinal direction, the three-dimensional guard is made of a breathable sheet material, and the leg portion is the sheet. 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, and the free three-dimensional guard elastic member is disposed on the surface of the leak-proof sheet. The above object is achieved by providing an absorbent article disposed at the edge.
[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 and 2, 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 pair of leg portions 1 are formed outward from the left and right side edges of the absorbent body 4, and a pair of three-dimensional guards 6 having three-dimensional guard elastic members 64 are formed on both left and right sides in the longitudinal direction. Yes. Thereby, a gather is formed in the three-dimensional guard 6.
[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. The left and right side edges B1, B2 of the back side B are provided with tape fasteners 11 for wearing disposable diapers.
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. And the sheet material 61 has the longitudinal direction edge fixed to the surface sheet 2 at the waist opening 8 side, and the longitudinal direction side part is adhered and fixed to the surface sheet 2 at the leg portion 7. . Accordingly, the base end 60 of the three-dimensional guard 6 is located on the top sheet 2 in the leg portion 7.
The back side part B positioned on the back side of the wearer when worn is provided with a back side stretchable part 9 formed by arranging a plurality of back side elastic members 91 along the width direction of the disposable diaper 1. .
[0007]
Thus, in the disposable diaper 1 of the present embodiment, the three-dimensional guard 6 is composed of a breathable sheet material 61, and the leg portion 7 is a breathable sheet disposed on the surfaces of the sheet material 61 and the leak-proof sheet 3. A plurality of three-dimensional guard elastic members 64 are arranged between the base end 60 and the free edge 63 and are arranged on the free edge 63 of the three-dimensional guard 6.
[0008]
More specifically, one three-dimensional guard elastic member 64 is arranged at the free edge 63 and four between the free edge 63 and the base end 60. That is, the “plurality” means that a plurality of solid guards 6 are arranged, and it is not always necessary to arrange a plurality of them on the free edge. 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.
[0009]
The width W of the three-dimensional guard 6 is preferably 10 to 150 mm.
Moreover, it is preferable to arrange 3 to 20 solid guard elastic members. Moreover, it is preferable that the space | interval T between each solid guard elastic member shall be 2-50 mm.
In the present invention, the distance between the solid guard elastic member of the free edge 63 and the solid guard elastic member provided in the vicinity thereof is set to 1 to 10 mm, and is gradually increased by 1 to 10 mm, or the free edge end. The distance between the 63 solid guard elastic member and the solid guard elastic member provided in the vicinity thereof may be 4 to 40 mm, and may be gradually reduced by 1 to 10 mm.
[0010]
Further, the stress at the free edge 63 is made larger than the stress at the portion where the other three-dimensional guard elastic member 64 is disposed. In the present embodiment, the stress of the three-dimensional guard elastic member 64 disposed on the free edge 63 is larger than the stress of each three-dimensional guard elastic member 64 disposed between the free edge 63 and the base end 60. Is preferred.
Specifically, the stress of the three-dimensional guard elastic member 64 disposed on the free edge 63 is preferably 10 to 1000 gf, and 5 to 500 gf larger than the stress of each of the other three-dimensional guard elastic members 64. It is preferable to do this.
Here, the “stress” can be measured as follows.
<Method for measuring stress of elastic member>
The elastic member was cut out to a length of 150 mm, and a tensile test was performed using a Tensilon tensile tester (manufactured by Orientec Co., Ltd.) with a chuck of 100 mm and a pulling speed of 300 mm / min, and the stress at 100% elongation was measured.
[0011]
Moreover, it is preferable that the base end 60 is adjacent to the side edge of the leak-proof sheet 3, and in this embodiment, the base end 60 is provided adjacent to the side edge of the topsheet 2 and the leak-proof sheet 3. It has been. And the width direction outer side of a diaper from this base end 60 consists only of the lamination sheet which bonds the sheet material 61 and the outer-layer nonwoven fabric 5 together.
Moreover, it is preferable that the width direction length L (length between the width direction side edge of a diaper and the side edge of an absorber) of the leg part 7 shall be 5-50 mm, and the part which consists only of the said lamination sheet | seat The width direction length L ′ is preferably 5 to 50 mm. And the base end 60 is formed by adhering the sheet | seat material 61 to the outer-layer nonwoven fabric 5 in the leg part 7 via an adhesive agent.
[0012]
Next, the formation material of each member which comprises the disposable diaper 1 of this embodiment is demonstrated.
As a material for forming the top sheet 2, the leak-proof sheet 3, the absorber 4, the waist elastic member 81, and the fastening tape 11, those usually used for disposable diapers can be used without particular limitation.
[0013]
The sheet material 61 and the outer nonwoven fabric 5 are each air permeable, and their 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 effect of preventing stuffiness can be effectively obtained.
In addition, the sheet material 61 and the outer layer nonwoven fabric 5 each preferably have a water pressure resistance (water repellency) of 3.0 g / cm ² or more, and more preferably 5.0 g / cm ² or more. preferable. By setting the water pressure resistance to 3.0 g / cm ² or more, it is possible to prevent excrement from seeping out from the three-dimensional guard and leaking out from the breathable part of the leg part. .
Further, the sheet material 61 and the outer layer nonwoven fabric 5 each preferably have a strength in the CD direction of 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 possible to prevent the fastening tape from being removed from the root.
As a material for forming the sheet material satisfying such conditions, spunbond nonwoven fabric, spunbond-meltblown-spunbond nonwoven fabric (SMS), spunbond-meltblown-meltblown-spunbond nonwoven fabric (SMMS), heat roll nonwoven fabric, air A through nonwoven fabric etc. are mentioned. Examples of the material for forming the outer layer nonwoven fabric include spunbond nonwoven fabric, SMS, SMMS, heat roll nonwoven fabric, and air-through nonwoven fabric.
[0014]
Here, the air permeability, the water pressure resistance and the strength are each measured as follows.
Air permeability: Measured according to JIS-P8117. That is, the sheet was cut into 70 × 70 mm, and the time required for 100 ml of air to permeate was measured using an air permeability measuring device (Oken type air permeability measuring device).
Water pressure resistance: measured according to JIS-L1092.
Strength: A test piece having a width of 25 mm in the flow direction (MD) of the original fabric and a length of 150 mm in a direction (CD) perpendicular to the flow direction was cut out. The test piece was subjected to a tensile test using a Tensilon tensile tester (manufactured by ORITENTECH Co., Ltd.) with a chuck distance of 50 mm and a CD direction pulling speed of 300 mm / min, and the strength at break was measured.
[0015]
The three-dimensional guard elastic member 64 is not particularly limited as long as it satisfies the above-described stress, 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.
[0016]
The disposable diaper 1 of this embodiment can be used similarly to a normal unfolded disposable diaper.
And in the disposable diaper 1 of this embodiment, since the some solid guard elastic member 64 is distribute | arranged to the solid guard 6, a pocket part is formed between each solid guard elastic members 64, and, thereby, excrement is carried out. Even if it exceeds the three-dimensional guard 6, it is collected by these pocket portions, and leakage from the leg portions can be effectively prevented. And since the leg part 7 consists only of a breathable sheet | seat, it is excellent in breathability and does not become stuffy at the time of wear.
Here, the “pocket part” includes not only those formed continuously in the longitudinal direction of the disposable diaper but also those formed with a plurality of recesses discontinuously. In particular, when a gather is formed by arranging a three-dimensional guard elastic member as in this embodiment, a plurality of irregularities are formed between the three-dimensional guard elastic members as the gather is formed. And the "pocket part" in this specification is the meaning which includes what is formed between the three-dimensional guard elastic members and is formed with a plurality of discontinuous recesses in the longitudinal direction of the disposable diaper.
[0017]
The disposable diaper according to the present embodiment adheres a sheet material in which a plurality of elastic members are arranged at predetermined intervals to a predetermined position after the absorbent body and the waist elastic member are sandwiched and fixed between the leak-proof sheet and the top sheet according to a conventional method. Is obtained.
[0018]
In the description of the above-described embodiment, the case where the gathers are not formed on the leg portion 7 has been described as an example. However, the present invention is not limited to this, and an elastic member is disposed on the leg portion. It is good also as a form which has. In this case, the leakage preventing effect is improved by the function of the leg gathers.
Further, in the description of the above-described embodiment, the unfolded disposable diaper is illustrated and described. However, the present invention is a pants-type disposable diaper (in this case, the longitudinal direction is the vertical direction of the disposable diaper) It can also be applied to sanitary napkins.
Moreover, although the thing which has the base end 60 of a solid guard in the leg part 7, ie, the thing which is not on an absorber, is illustrated, it is not restricted to this but the base end 60 seems to be located on the absorber 4. Anyway. In this case, even if excrement gets over the three-dimensional guard, it is absorbed by the absorption part outside the base end part, so that the leakage prevention effect is further improved.
[0019]
Moreover, in order to prevent the leak from a waist part in the both sides or either one of a back side part, the waist part solid guard provided with the solid guard elastic member may be formed.
Moreover, the edge part of the elastic material arrange | positioned at a solid | guard guard or a three-dimensional guard may be adjacent to the support part of a tape fastener by curving the three-dimensional guard or the elastic material arrange | positioned at a three-dimensional guard.
Moreover, the free end part from the base end part of the three-dimensional guard may be laminated with the liquid permeable or liquid impermeable film.
Further, the three-dimensional guard itself may be formed of a stretchable sheet material.
Furthermore, the stress of the three-dimensional guard elastic member arranged on the free edge may be made larger than that of other elastic members by arranging a plurality of elastic members on the free edge. Moreover, you may use a water-repellent mount, a nonwoven fabric, and a liquid-impermeable film for the material which comprises an absorber, and you may cover the lower part and side part of an absorption part with these materials. In this case, it is effective to prevent excrement once absorbed by the wearer's body pressure from oozing out from the absorber.
[0020]
【The invention's effect】
The absorbent article of the present invention effectively prevents stuffiness during wearing and is excellent in preventing leakage from the leg portion.
[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 of FIG. 1 in a state where an elastic member is in an extended state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 11 Fastening tape 2 Top sheet 3 Leak-proof sheet 4 Absorber 5 Outer layer nonwoven fabric 6 Solid guard 60 Base 61 Sheet material 63 Free edge 64 Solid gather elastic member 65 Pocket part 7 Leg guard 71 Leg elastic member 8 Waist opening Part 81 Waist elastic member A Abdominal side B Back side

Claims (4)

It comprises a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent, and a pair of leg portions are formed outward from the left and right side edges of the absorbent. In the absorbent article in which a pair of three-dimensional guards provided with three-dimensional guard elastic members are formed on the left and right sides,
The three-dimensional guard is made of a breathable sheet material,
A breathable outer layer nonwoven fabric is disposed on the surface of the leak-proof sheet,
The base end of the three-dimensional guard is adjacent to the side edge of the top sheet and the leak-proof sheet,
The leg portion, in the width direction outwardly of the diaper from the proximal end of the three-dimensional guard is made of only the laminated sheet composed by bonding the said sheet material and the front Kigai layer nonwoven,
The three-dimensional guard elastic members, the absorbent article being arranged in a plurality arranged which has, and the free-acquaintance end between said base end and a free edge of the three-dimensional guard. The absorbent article according to claim 1, wherein pockets are formed between the three-dimensional guard elastic members.   The absorbent article according to claim 1 or 2, wherein the stress at the free edge is larger than the stress at a portion where another three-dimensional guard elastic member is disposed.   The absorptive article according to any one of claims 1 to 3 whose CD strength of said sheet material and said outside layer nonwoven fabric is 1000 cN / 50mm or more, respectively.

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