JP4215370B2 - Absorbent articles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pants-type absorbent article such as a disposable diaper having excellent anti-moisture properties.
[0002]
[Prior art and problems to be solved by the invention]
In general, disposable diapers comprise a liquid-permeable top sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent, and are positioned on the abdomen side of the wearer when worn, and a dorsal side part. And a crotch part located between them.
In recent years, a so-called pants-type disposable diaper has been proposed in which a side edge on the abdominal side and a side edge on the back side are joined and fixed to each other to form a pair of left and right leg openings and one waist opening. Ori (Japanese Patent Laid-Open No. 61-207605), Yes, for children with active movements such as walking, for toilet training to promote infant diaper removal, for incontinence and for walkable adults, etc. Used for applications.
[0003]
In order to prevent stool and urine leakage from the waist opening in such a pant-type disposable diaper, the present applicant has proposed a pant-type diaper in which a three-dimensional guard is formed on the waistline of the wearer. It is (JP-4 -354948 JP).
[0004]
With this three-dimensional guard in a diaper, a pocket is formed between the three-dimensional guard and the diaper body, and excrement can be captured, but the pocket tends to collapse in some cases due to the wearer's movement and posture or the pressure of clothing worn. There was a difficulty.
[0005]
Accordingly, the object of the present invention is to provide a pants-type absorbent such as a disposable diaper having excellent anti-moisture properties, in which pockets that are not easily crushed are formed, and stool and urine leakage from the waist opening can be effectively prevented. To provide an article.
[0006]
[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, and both side edges of the abdomen and the dorsal side are joined to each other, and the waist In the pants-type absorbent article in which the opening and the pair of leg openings are formed, a three-dimensional guard is formed on the waistline portion located around the wearer's waist in the abdomen side portion and / or the back side portion. The three-dimensional guard is provided with a plurality of three-dimensional guard elastic members, can be expanded and contracted in the waistline direction, has an outer layer material, and the top sheet, the leak-proof sheet, and the absorber are A vertically long absorptive main body is formed integrally, the absorptive main body is joined to the outer layer material with its longitudinal direction coinciding with the longitudinal direction of the outer layer material, A plurality of the three-dimensional guard elastic members are provided. The three-dimensional guard forming sheet material is formed so as to be arranged in the crotch direction from the waist opening edge side of the absorbent article, and the three-dimensional guard in the three-dimensional guard forming sheet material By providing an absorbent article in which the portions located on the left and right outer sides of the left and right side fixed ends are fixed on the absorbent main body or the outer layer material over the entire area thereof, respectively. Is achieved.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the absorbent article of the present invention will be described in detail.
As shown in FIGS. 1 and 2, a disposable diaper 1 (hereinafter also simply referred to as a diaper) 1 as an absorbent article according to the first embodiment includes a liquid-permeable surface sheet 2 and a liquid-impermeable leak-proof sheet 3. And a substantially vertically long absorbent main body 10 including the liquid-retaining absorbent body 4 and an outer layer material 11 to which the absorbent main body 10 is bonded and fixed.
[0008]
The disposable diaper 1 of the present embodiment has an abdominal side A disposed on the wearer's abdomen, a back side B disposed on the dorsal side, and a crotch C positioned therebetween, and the abdomen side The side edges A1, A2 of A and the side edges B1, B2 of the back side B are joined together to form a waist opening 5 and a pair of leg openings 6. A plurality of waist elastic members 51 are arranged in the circumferential direction on the waist portion D located around the wearer's waist to form a waist gather, and the waist portion E located around the waist has a plurality of waist circumferences. The partial elastic members 52 are arranged in the circumferential direction to form a waistline gather. Here, the waist part D usually means a belt-like region within a width of 10 mm from the waist opening edge 53, and the waistline part E is closer to the center line C1 in the longitudinal direction of the diaper 1 than the waist part D. Means the part that is located.
[0009]
The top sheet 2, the leak-proof sheet 3, and the absorber 4 each have a rectangular shape and are integrated to form a vertically long absorbent main body 10. As shown in FIG. 2, the absorbent main body 10 is bonded and fixed to the central portion of the outer layer material 11 with its longitudinal direction coinciding with the longitudinal direction of the outer layer material 11. The longitudinal direction of the diaper 1 and the longitudinal direction of the outer layer material 11 are directions connecting the abdominal side A and the back side B in a state where the diaper is deployed in a planar shape as shown in FIG. means.
[0010]
The outer layer material 11 includes at least two nonwoven fabrics, that is, an outer layer nonwoven fabric 12 and an inner layer nonwoven fabric 13 disposed on the inner surface side of the outer layer nonwoven fabric 12. The outer layer material 11 forms the outer shape of the diaper, the outer layer nonwoven fabric 12 constituting the outer layer material 11 forms the outer surface of the diaper 1, and the inner layer nonwoven fabric 13 is bonded to the inner surface side of the outer layer nonwoven fabric 12 by a hot melt adhesive or the like. It is joined by the agent. The outer layer material 11 is provided with a leg elastic member 61 that is curved along the edge of the leg opening forming portion in each of the pair of leg opening forming portions. The waist elastic member 51 and the leg elastic member 61 are nipped and fixed by the outer nonwoven fabric 12 and the inner nonwoven fabric 13, respectively.
[0011]
Thus, three-dimensional guards are respectively formed on the waist portions E and E of the diaper 1 of the present embodiment, which are positioned around the waists of the wearers of the abdominal side A and the back side B, respectively. , 7 are provided with a plurality of three-dimensional guard elastic members 71, and the three-dimensional guards 7, 7 can be expanded and contracted in the waistline direction.
Each solid guard 7 is formed by forming a solid guard forming sheet material 72 having a plurality of solid guard elastic members 71 from the waist opening edge 53 side of the diaper 1 toward the crotch C direction. Yes.
[0012]
The sheet material 72 for forming the three-dimensional guard may be one sheet or two or more sheets forming the outer layer material 11 folded back on the inner surface side of the diaper. In the back side portion B of the diaper 1 of the present embodiment, As shown in FIG. 3, the outer layer nonwoven fabric 12 is folded back to the inner surface side of the diaper at the waist opening edge 53, and the folded portion 15 is used as a sheet material for forming the three-dimensional guard 7.
The three-dimensional guard 7 may be formed of a sheet material separate from the sheet material forming the outer layer material 11, and in the ventral side portion A of the diaper 1 of the present embodiment, as shown in FIG. The three-dimensional guard 7 is formed of a sheet 72b different from the nonwoven fabric 12. When the three-dimensional guard 7 is formed using a material separate from the sheet material for forming the outer layer material 11, a function different from the function of the outer layer material 11, such as a three-dimensional guard having a sweat absorbing function, can be easily formed. This is preferable.
[0013]
The plurality of three-dimensional guard elastic members 71 are preferably disposed on the three-dimensional guard 7 over a width of 10 mm or more (see W1, FIGS. 3 and 4). In the three-dimensional guard 7 in the present embodiment, a plurality of three-dimensional guard elastic members 71, 71. Are arranged over the entire width of the diaper 1 in the longitudinal direction. It has elasticity in the waist direction (circumferential direction of the waist) over the entire width in the longitudinal direction.
[0014]
As the three-dimensional guard elastic member 71, as shown in FIG. 3 or 4, an end elastic member 71 a is arranged along the free edge of the three-dimensional guard free end 73, and in parallel with the end elastic member 71 a. It is preferable to arrange another elastic member 71b with a predetermined interval between the elastic members.
As a method of fixing the three-dimensional guard elastic member 71 to the three-dimensional guard-forming sheet material 72, a hot-melt adhesive, heat sealing, or the like can be used. In particular, as shown in FIGS. A sheet folded portion is formed by folding the guard-forming sheet material 72 toward the absorbent main body 10 at the free end 73, and the three-dimensional guard elastic member 71 is fixed between the layers of the sheet folded portion. Is preferred. By forming such a sheet folding portion, it is possible to further improve the leakage prevention effect.
[0015]
The plurality of three-dimensional guard elastic members 71 are preferably set in their layout and expansion ratio so that the free end of the three-dimensional guard can be expanded and contracted most.
From such a point of view, (1) the arrangement pitch of the three-dimensional guard elastic members is arranged so as to become denser as the free end is approached, and (2) the elongation stress of the end elastic member arranged at the free end is: It is effective to make it larger than other elastic members, and (3) to increase the modulus of the elastic member in the vicinity of the free end, for example, to increase the cross-sectional area.
[0016]
As shown in FIG. 2A, the three-dimensional guard 7 has the left and right side fixed ends 7A and 7A positioned in the vicinity of the left and right side edges 4a and 4a of the absorber 4, respectively. The side fixed ends 7A and 7A mean the fixed ends on the left and right sides in the longitudinal direction of the diaper 1 in the three-dimensional guard 7, and the both side fixed ends 7A and 7A are located in the vicinity of the left and right side edges of the absorber 4. By positioning, the pocket P for holding stool and urine formed between the three-dimensional guard 7 and the top sheet 2 can be made to be particularly large and have a large volume.
[0017]
In the state where the disposable diaper 1 is deployed as shown in FIG. 2A, the left and right side fixed ends 7A and 7A of each three-dimensional guard 7 and the left and right side edges of the ventral side A or the back side B The distance W2 can be determined as appropriate depending on whether the wearer is an infant or an adult, for example, 85% or less of the total width W3 in the diaper width direction, particularly 50 to 70%. preferable.
[0018]
In the case of diapers for infants, each solid guard 7 prevents the excretion point from being covered by the solid guard 7 and makes the volume in the holding pocket P sufficient, and from the viewpoint of economy and the like. It is preferable that the length in the direction coinciding with the longitudinal direction of the diaper is 20 to 150 mm.
The side fixed end 7A is within a range from a position 5 cm on the inner side in the width direction of the diaper 1 to a position 5 cm on the outer side in the width direction of the diaper 1 with respect to the left and right side edge ends 4 a of the absorber 4. Preferably it is located.
[0019]
Moreover, the end fixed end 7B near the waist opening edge 53 in the three-dimensional guard 7 may be provided on the upper surface of the end flap of the absorbent main body 10 (see FIGS. 3 and 4), or on the absorber 4 or the outer layer. It may be provided on the upper surface of the material 11. When the pants-type diaper is composed of a combination of the absorbent main body 10 and the outer layer material 11, the portion of the sheet material 72 for forming the three-dimensional guard is closer to the waist opening edge 53 than the end fixed end 7B. It is preferable that the end of the main body 10 in the longitudinal direction is covered.
[0020]
In the diaper 1 of the present embodiment, the left and right side fixed ends 7A, 7A of the sheet material 72 for forming the three-dimensional guard are positioned on the left and right outer sides of the left and right side fixed ends 7A, and the waist opening edge 53 side of the end fixed ends 7B. The portions located outside are fixed on the absorbent main body 10 or the outer layer material 11 over the entire region. In addition, although it is preferable that the part fixed to the sheet | seat material 72 is partially adhere | attached over the whole region, only the part may be fixed and it does not need to be fixed.
[0021]
As a means for fixing the sheet material 72 for forming the three-dimensional guard on the absorbent main body 10 or the outer layer material 11, a hot-melt adhesive, a heat seal, an ultrasonic seal, or the like can be used. In the diaper 1 of the present embodiment, the free end of the three-dimensional guard in the ventral side A is located closer to the diaper longitudinal center line C1 than the free end of the three-dimensional guard in the back side B. .
[0022]
The plurality of three-dimensional guard elastic members 71 arranged on the three-dimensional guard 7 are preferably arranged so as to extend between the left and right side fixed ends of the three-dimensional guard 7, and moreover, the plurality of three-dimensional guard elastic members 71 are arranged. All or a part of the member 71 is arranged so as to extend between the left and right side joints 8 and 8 formed by joining both side edges of the abdominal part A and the back part B. Is preferred. By arranging a plurality of three-dimensional guard elastic members so as to extend between the left and right side fixed ends of the three-dimensional guard 7, an effective holding pocket can be effectively formed. By arranging all or a part of the member 71 so as to extend between the left and right side joints, the three-dimensional guard 7 can be particularly well adhered to the skin of the wearer.
[0023]
In the present invention, as shown in FIGS. 3 and 4, a plurality of waistline elastic members 52 are respectively provided on the outer surface N side of the diaper 1 from the absorbent body 4 in the ventral side A and / or the backside B. It is preferable to arrange | position in the expansion | extension state along a direction.
In the disposable diaper of the present embodiment, a plurality of waistline elastic members 52 and 52 are stretched between the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13 of the outer layer material 11 in each of the abdominal side A and the back side B. It is clamped and fixed by.
By arranging the three-dimensional guard 7 provided with a plurality of three-dimensional guard elastic members 71, the diaper floats from the body during wearing, but by arranging such a waistline elastic member 52, The poor appearance can be solved and the appearance during wearing can be improved.
[0024]
However, when the waistline elastic member 52 is disposed, it should be noted that the pocket P formed on the inner surface of the three-dimensional guard 7 is easily crushed. If the pocket P is crushed, the leakage prevention effect of the present invention cannot be effectively exhibited.
Therefore, it is important that a gap is formed between the solid guard 7 and a member (surface sheet or the like) positioned outside the solid guard when the absorbent article of the present invention is worn. Strictly speaking, the method for this is closely related to the physical properties of the material constituting the absorbent article, such as the rigidity and hardness, and the location and amount of adhesive used, but the most important design factor is the site. These are the physical properties, elastic stress and elongation rate of the elastic member disposed in F. After assembling the absorbent article, the waistline elastic member disposed in the region F is bonded and fixed to the outer layer material and disposed outside the absorbent body. Shrinkage is hindered by the influence of the components of the property article. On the other hand, since the elastic member disposed on the three-dimensional guard 7 is only affected by the sheet material and the adhesive constituting the three-dimensional guard, the shrinkage is hardly inhibited. Therefore, a gap is formed between the three-dimensional guard and the absorber (surface sheet), and acts as a pocket. In this way, the elastic member is designed so that a gap is formed between the three-dimensional guard and a member (surface sheet or the like) located outside the three-dimensional guard in consideration of the influence of the constituent members. Is preferred.
[0025]
Each of the waistline elastic members 52 in the diaper 1 of the present embodiment is disposed so as to be stretchable over the entire circumference of the waistline E located around the wearer's waist, but overlaps the absorber 4. You may arrange | position so that elastic elasticity may be expressed only in a site | part. Further, the waistline elastic member 52 may be disposed only in a portion excluding a portion overlapping with the absorber 4, or disposed so as to exhibit elastic stretchability only in a portion excluding the portion overlapping with the absorber 4. May be.
[0026]
Further, the waistline elastic member 52 in the diaper 1 is disposed so as to cross a portion where the absorber 4 is disposed. However, the length of the absorber 4 in the longitudinal direction is shortened, or the absorber 4 is disposed on the ventral side. The waistline elastic member 52 may be disposed so as not to cross the absorber 4 by being biased and disposed on the part A side or the back side B side. It is also effective to dispose the waistline elastic member 52 in a curved manner.
[0027]
Further, side cuffs 8 ′ and 8 ′ having free portions are formed on the left and right sides in the longitudinal direction of the absorbent main body 10, and an elastic member that can expand and contract in the vicinity of the free end of each side cuff 8 ′. Those having 81 are preferred. In particular, it is preferable that the three-dimensional cuff is formed from a liquid resistant or liquid impermeable and breathable material.
[0028]
Moreover, it is preferable that the sheet material 72 forming the three-dimensional guard 7 is attached or impregnated with an anti-blurring component. By attaching or impregnating the anti-fogging component, diaper rash can be effectively suppressed even if the three-dimensional guard contacts the skin in a wide area. Any anti-fogging component may be used as long as it can suppress diaper rash, and examples thereof include an anti-inflammatory agent, a barrier agent, and an antibacterial agent.
[0029]
Below, the forming material of the structural member of the diaper 1 of this embodiment is demonstrated.
The sheet materials 12 and 13 constituting the outer layer material 11 and the sheet material 72 for forming a three-dimensional guard are preferably liquid resistant, liquid impermeable, moisture permeable and breathable, and have a high feel close to underwear. It is a flexible sheet material. Specifically, a woven fabric, a nonwoven fabric, a film, a moisture permeable film, a perforated film, or a composite material thereof can be used.
[0030]
The three-dimensional guard in the present invention adheres to the wearer's skin over a wide area, and is preferably formed with a soft touch, low irritation, and highly breathable material that is difficult to get stuffy. When a nonwoven fabric is used as the material, it is preferable that the fineness of the constituent fibers is 50 denier or less, particularly 10 denier or less, in order to reduce irritation.
Further, as a forming material of the three-dimensional guard elastic member 71, natural rubber, spandex, foam, film-type rubber, or the like can be used, and the shape of the cross section is a rectangular, square, circular, or polygonal thread shape. And tape-like ones are preferred. An elastic member having a property of being plasticized by heat is also preferably used. Moreover, as the elastic member 81 distribute | arranged to a side cuff formation material and a side cuff, the thing similar to the thing in the solid guard 7 can each be used.
[0031]
As other structural members, for example, the top sheet 2, the leak-proof sheet 3, the absorber 4, the waist elastic member 51, the leg elastic member 61, etc., those normally used for disposable diapers can be used without any particular limitation. .
[0032]
The disposable diaper of this embodiment can be used similarly to a normal pants-type disposable diaper.
And according to the disposable diaper of this embodiment, the waist opening can be obtained by exerting one or more of the following effects (1) to (4) and the other effects exhibited by the above configuration. The stool and urine leakage from the part is effectively prevented, and an excellent anti-moisture prevention effect is obtained.
(1) Due to the three-dimensional guard provided with a plurality of three-dimensional guard elastic members, the absorbent main body is curved convexly on the outer surface side of the diaper 1, and large stool and urine are retained between the three-dimensional guard and the top sheet. A pocket is formed.
(2) Since a plurality of three-dimensional guard elastic members are arranged on the three-dimensional guard, the formed stool and urine holding pockets are not easily blocked even during wearing.
(3) The three-dimensional guard fits snugly on the wearer's skin over a wide area, and an excellent mole resistance seal is formed.
(4) The portion of the three-dimensional guard in which the three-dimensional guard elastic members are arranged forms a multi-stage barrier, so even if stool or urine gets over the free end of the three-dimensional guard, it is difficult to connect to the leakage from the waist opening .
[0033]
In addition, this invention is not restrict | limited to the said embodiment, It can change suitably. For example, the three-dimensional guard having the above-described configuration may be formed only on one of the back side portion B and the ventral side portion A. In addition, each description described in relation to the three-dimensional guard and the three-dimensional guard is applied to each of the back side portion B and the ventral side portion A when the three-dimensional guard is formed only on the back side portion. In the case where a solid guard is provided on both B and the ventral side A , and is not particularly limited to the compatibility guard, it is applied to each solid guard. Moreover, the requirement which any one of the back part B and the ventral part A comprises can be suitably applied to the other for each requirement.
[0034]
【The invention's effect】
The absorbent article of the present invention can effectively prevent stool and urine leakage from the waist opening, and is excellent in the prevention effect.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a partially cutaway perspective view showing an embodiment of a disposable diaper as an absorbent article according to the present invention.
2 (a) is a development view of the disposable diaper of FIG. 1, and FIG. 2 (b) is a schematic sectional view taken along line XX of FIG. 2 (a).
FIG. 3 is a longitudinal cross-sectional view schematically showing a region from a waist opening edge to a waistline center in a disposable diaper according to an embodiment of the present invention.
FIG. 4 is a longitudinal sectional view schematically showing from the waist opening edge to the waistline center in a disposable diaper according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Absorbent article 10 Absorbent main body 2 Top sheet 3 Leakproof sheet 4 Absorber 5 Waist opening 51 Waist elastic member 52 Girth elastic member 53 Waist opening edge 6 Leg opening 61 Leg elastic member 7 Solid guard 71 Three-dimensional guard elastic member 7A Side fixed end 7B End fixed end 11 Outer layer material 12 Outer layer nonwoven fabric 13 Inner layer nonwoven fabric A Abdominal side portion B Back side portion C Crotch portion D Waist portion E Girth portion

Claims (7)

A liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-holding absorber are provided, and both side edges of the abdomen and the back are joined to each other to form a waist opening and a pair In the pants-type absorbent article in which the leg opening of
A three-dimensional guard is formed on the waist part of the abdomen and / or the back part located around the waist of the wearer, and the three-dimensional guard is provided with a plurality of three-dimensional guard elastic members, and the waist direction. It is made to be stretchable ,
It has an outer layer material, and the top sheet, the leak-proof sheet, and the absorber are integrated to form a vertically long absorbent main body, and the absorbent main body has a longitudinal direction of the outer layer material. It is joined to the outer layer material in accordance with the longitudinal direction,
The three-dimensional guard is formed by arranging a three-dimensional guard forming sheet material including a plurality of three-dimensional guard elastic members from the waist opening edge side of the absorbent article toward the crotch part. ,
In the sheet material for forming the three-dimensional guard, the portions located on the left and right outer sides of the right and left side fixed ends of the three-dimensional guard are respectively fixed on the absorbent main body or the outer layer material over the entire area. Absorbent articles that have been .   2. The absorbent article according to claim 1, wherein the right and left side fixed ends of the three-dimensional guard are positioned in the vicinity of the left and right side edges of the absorbent body, respectively.   All or a part of the plurality of three-dimensional guard elastic members are arranged so as to span between left and right side joint portions formed by joining both side edges of the abdominal side portion and the back side portion. The absorbent article according to claim 1 or 2. On the outer surface side of the front Kihara side and / or the absorbent article than the absorber in the rear section, the claims plurality of waist elastic members are disposed in a stretched state, respectively along the waistline direction The absorbent article in any one of 1-3.   The absorbent article according to claim 4, wherein a gap is formed between the three-dimensional guard and a member positioned outside the three-dimensional guard in the thickness direction of the absorbent article. The absorbent article according to any one of claims 1 to 5 , wherein a plurality of the three-dimensional guard elastic members are arranged so as to extend over the entire width of the three-dimensional guard in the longitudinal direction of the absorbent article in a developed state. Before Symbol the sheet material for stereoscopic guard formation, a portion located outward from an end portion fixed end of the waist opening edge side of the three-dimensional guard, the absorbent body or the outer layer material over its entire area The absorbent article in any one of Claims 1-6 currently fixed on the top.

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