JP5244301B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article, and more particularly to a disposable absorbent article for adults.

  Conventionally, in adult disposable absorbent articles, prevention of leakage of excrement has been required, and the following absorbent articles have been disclosed in response to such demands. Each of the absorbent articles includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbing absorbent body interposed between the top sheet and the back sheet. .

The first absorbent article further includes a top sheet disposed along the longitudinal direction on the top sheet. The top sheet has elasticity and is fixed to the top sheet at both ends and the center. . Thereby, an upper surface sheet is extruded to a wearer's skin side, and the clearance gap between an absorbent article and a wearer's skin is narrowed (refer patent document 1).
Here, the top sheet is formed of a material having liquid permeability and liquid absorbability. For this reason, the excrement discharged | emitted from the wearer permeate | transmits an upper surface sheet, and while being absorbed by an absorber via a top sheet, the excrement remaining on the upper surface sheet is absorbed by an upper surface sheet.

The second absorbent article further includes a top sheet disposed above the top sheet. The upper surface sheet is separated from the top sheet in a natural state, but when a weight having a predetermined weight is placed on the center portion, the upper surface sheet is extended so that the center portion contacts the top sheet (Patent Document 2). 3).
As a result, when excrement of a predetermined weight or more is discharged to the center part of the top sheet, the center part of the top sheet comes into contact with the top sheet, and the excrement moves to the top sheet, and then is absorbed by the absorber. Is done.
JP 2004-188115 A JP-A-3-231664 JP-A-3-234257

  However, the absorbent article described above has the following problems.

  In the first absorbent article, since the top sheet is formed of a liquid-absorbing material, the rigidity is increased. For this reason, since the top sheet is not inserted into the narrow groove of the cracked portion and does not adhere to the unevenness of the skin, the gap between the top sheet and the wearer's skin is not sufficiently filled. Then, excrement leaks outside by flowing along the groove of the cracked portion. In particular, when low-viscosity excrement such as urine and watery feces is excreted, leakage easily occurs.

  In the second absorbent article, when lightweight excrement such as watery feces is discharged, the upper sheet does not expand and does not contact the top sheet, and therefore, the excretion is not promoted to be transferred to the top sheet. For this reason, the excrement that has not been absorbed flows along the groove of the cracked portion and leaks to the outside.

  This invention is made | formed in view of the above situation, and it aims at providing the absorbent article which can fully suppress the leakage of excrement.

  The present inventors have found that the gap between the upper surface sheet and the wearer's skin can be sufficiently filled by reducing the bending resistance of the upper surface sheet, and have completed the present invention. More specifically, the present invention provides the following.

  (1) An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid absorption-retaining absorbent interposed between the top sheet and the back sheet. The top sheet further includes a top sheet connected to the front end side of the top sheet in the longitudinal direction of the top sheet, the other end side in the vicinity of the rear end in the longitudinal direction of the top sheet, An absorbent article having a bending resistance measured by a JIS L 1096 cantilever A method of 120 mm or less in a direction arranged in a short direction of the top sheet.

According to the invention of (1), one end of the top sheet is connected to the front center side in the longitudinal direction of the top sheet or from the center, and the other end is connected to the vicinity of the rear end in the longitudinal direction of the top sheet. Sometimes the top sheet faces the wearer's crack.
Here, since the bending resistance in the direction in which the top sheet is arranged in the short direction is set to 120 mm or less, the top sheet is flexibly deformed and inserted into the narrow groove of the cracked portion, thereby causing unevenness of the skin. In close contact. Therefore, since the gap between the upper surface sheet and the wearer's skin is sufficiently filled, leakage of excrement can be sufficiently suppressed.

  Here, “near the rear end” refers to a portion that is opposed to a portion on the head side of the wearer's cracked portion when worn. That is, the range of “near the rear end” may be appropriately set based on the size and shape of the absorbent article, the expected physique of the wearer, and the like.

  (2) The absorbent article according to (1), wherein the bending resistance is 65 mm or more.

If the bending resistance is too small, the upper surface sheet is swung at the time of wearing, and a gap is generated between the upper surface sheet and the wearer's skin, and there is a concern that excrement may leak through the gap.
Therefore, according to the invention of (2), since the bending resistance is set to 65 mm or more, leakage of excrement can be reliably suppressed.

  (3) The absorbent article according to (2), wherein the bending resistance is 80 mm or more and 100 mm or less.

  According to the invention of (3), since the bending resistance is 80 mm or more and 100 mm or less, the leakage of excrement can be more reliably and sufficiently suppressed.

  (4) The absorbent article according to any one of (1) to (3), further including a length adjusting unit that adjusts a length of the top sheet sandwiched between parts connected to the top sheet.

  According to the invention of (4), since the length adjusting means is further provided, the top sheet can be adjusted to a desired length. Accordingly, by adjusting the top sheet to an appropriate length according to the shape of the cracked portion between the wearers and the like, the leakage of excrement can be more reliably and sufficiently suppressed. Can be improved.

  As a length adjustment method, specifically, a method in which a connection portion between the top sheet and the top sheet can be changed by installing a plurality of adhesive members on the top sheet and / or the top sheet, and the top sheet is elastic. Although the system etc. which make it possible to change the length of an upper surface sheet by providing are mentioned, it does not specifically limit.

  (5) The length adjusting means includes stretchability imparting means for imparting stretchability to the top sheet, and the top sheet has a tensile stress of 0. 0 in a state where the top sheet is stretched to 85% of the maximum stretch length. The absorbent article according to (4), which is 5N or more and 3.0N or less.

  According to the invention of (5), the stretchability is imparted to the topsheet by the stretchability imparting means, so the length of the topsheet is adjusted according to the wearer's body shape and the like. Therefore, since the leakage of excrement can be more reliably and sufficiently suppressed, the versatility of the absorbent article can be improved.

However, if the top sheet is insufficiently contractible, the force of the top sheet pressing against the skin of the wearer is weak, so excrement cannot fall to the top sheet, and it flows out through the groove in the cracked portion. Is concerned. On the other hand, when the contractibility of the top sheet is excessive, the force with which the top sheet presses against the skin of the wearer is too strong, and there is a concern that the wearer may have a great discomfort.
Therefore, according to the invention of (5), since the tensile stress of the top sheet is 0.5N or more and 3.0N or less, the leakage of excrement can be suppressed and the discomfort given to the wearer can be reduced.

  The stretchability imparting means is not particularly limited as long as the upper surface sheet can be configured to have stretchability as a result. Examples thereof include stretchable materials constituting the upper surface sheet, elastic members provided on the upper surface sheet, and the like. It is done. For example, if an elastic member or the like extending along the length direction of the upper surface sheet is employed as the stretchability imparting means, the upper surface sheet contracts and wrinkles are formed on the surface of the upper surface sheet. Since this wrinkle becomes a flow path for excrement, the excrement is dropped onto the top sheet and is easily absorbed and held by the absorber.

  (6) The absorbent article according to (5), wherein the top sheet is connected to the top sheet with a length of 1.2 times or more and 3.0 times or less of a natural length.

If the ratio of the distance between the connected parts to the natural length of the top sheet is too small, the top sheet that has shrunk when worn will not be sufficiently separated from the top sheet and will not reach the deep part of the groove of the cracked part There is. In this case, since a gap is generated between the upper surface sheet and the wearer's skin, there is a concern about leakage of excrement. On the other hand, if the ratio of the distance between the connected parts with respect to the natural length of the top sheet is too large, the top sheet that has shrunk when worn is loosened and tends to be displaced in the short direction of the top sheet. In such a case, there is a concern that the top sheet is not inserted into the wearer's cracked portion and excrement leaks out.
Therefore, according to the invention of (6), since the top sheet is connected to the top sheet with a length of 1.2 times or more and 3.0 times or less of the natural length, the leakage of excreta is more sufficiently and reliably performed. Can be suppressed.

  (7) The absorbent article according to any one of (1) to (6), wherein the top sheet has a width in a direction in which the top sheet is arranged in a short direction of the top sheet of 30 mm or more and 150 mm or less.

  (8) The absorbent article according to (7), wherein the top sheet has a width in a direction in which the top sheet is disposed in a short direction of the top sheet of 50 mm to 70 mm.

If the width of the top sheet is too narrow, the groove of the cracked part cannot be covered, and there is a concern that the excretion part flows through the uncovered part and leaks out. On the other hand, if the width of the top sheet is too wide, the top sheet is laid on the wearer's buttocks at the time of wearing and does not reach the deep part of the groove of the cracked part without being sufficiently separated from the top sheet. There is a case. In this case, since a gap is generated between the upper surface sheet and the wearer's skin, there is a concern about leakage of excrement.
Therefore, according to the invention of (7), since the width in the direction in which the top sheet is arranged in the short direction is set to 30 mm or more and 150 mm or less, leakage of excrement can be more sufficiently suppressed. Moreover, according to the invention of (8), since the width in the direction in which the top sheet is arranged in the short direction is set to 30 mm or more and 150 mm or less, leakage of excrement can be further sufficiently suppressed.

  Further, in the case where gathers are arranged on both sides in the longitudinal direction of the top sheet, there are the following problems if the width of the top sheet is too wide. That is, when the portion of the absorbent article facing the crotch is pressed by the wearer's foot and becomes narrower, the upper surface sheet is likely to be put on the gathers. Then, the excrement dropped from the top sheet rides on the gathers and may leak out. However, according to invention of (7) or (8), generation | occurrence | production of the above situations can also be suppressed, obtaining the effect by providing a gather.

  (9) The width of the direction arrange | positioned in the transversal direction of the said top sheet in the part connected further in the longitudinal direction of the said top sheet, and the said upper surface sheet in the part connected to the said rear end vicinity. The absorbent article according to any one of (1) to (8), wherein is not less than a distance between the gathers when worn.

  According to the invention of (9), since gathers are arranged on both sides of the top sheet, it is possible to suppress excrement dropped on the top sheet from leaking out from both sides. Furthermore, since the width | variety of the upper surface sheet in the part connected to the back end vicinity was made more than the distance between gathers at the time of wear, the excrement which flowed near the rear end vicinity of the top sheet is blocked by the top sheet. For this reason, since the excrement dropped on the top sheet can be prevented from leaking out from the rear end, the excretion leak can be more sufficiently suppressed.

  (10) An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbing / absorbing absorber interposed between the top sheet and the back sheet. The top sheet further includes a top sheet connected to the front side of the top sheet in the longitudinal direction of the top sheet, or to the front end side of the center of the top sheet, and to the vicinity of the rear end of the top sheet in the longitudinal direction of the top sheet. Absorbent article that does not substantially contain a material that absorbs and retains.

According to the invention of (10), one end of the top sheet is connected to the front center side of the top sheet in the longitudinal direction or the center of the top sheet, and the other end is connected to the vicinity of the rear end in the longitudinal direction of the top sheet. Sometimes the top sheet faces the wearer's crack.
Here, since the material for absorbing and holding the liquid is not substantially contained in the top sheet, the flexibility of the top sheet is not impaired. For this reason, the upper surface sheet is deformed flexibly and is inserted into a narrow groove of the cracked portion, and is in close contact with the unevenness of the skin. Therefore, since the gap between the upper surface sheet and the wearer's skin is sufficiently filled, leakage of excrement can be sufficiently suppressed.

  “Substantially does not contain” indicates that the upper sheet is not contained to the extent that the flexibility of the upper sheet is impaired. Specifically, it indicates that the content is not 1% by mass or more with respect to the entire upper sheet.

  (11) An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbing / absorbing absorber interposed between the top sheet and the back sheet, The top sheet is arranged at the approximate center in the short direction, and one end is at the front end side of the approximate center or the approximate center in the longitudinal direction of the top sheet, and the other end is near the rear end in the longitudinal direction of the top sheet, The guide portion further includes a guide portion connected to the guide portion, the guide portion being arranged at the center of the guide portion in the width direction and formed so as to be able to contact the wearer's cracked portion, and the contact portion. A separation portion provided on both sides and spaced apart from the wearer's cracking portion, and the fluid supplied to the contact portion flows to the separation portion, and the top from both sides of the separation portion Absorbent article that falls into a sheet.

According to the invention of (11), at the time of wearing, the abutting portion arranged at the center in the width direction of the guiding portion abuts on the cracked portion, and the separating portion is separated from the cracked portion. For this reason, the excrement discharged | emitted from the wearer will take the following trends.
First, since the gap between the abutting part and the cracked part is sufficiently filled, excrement supplied to the abutting part does not pass through the groove of the cracked part, and the It moves toward the separation part while contacting the contact part. Subsequently, the excrement that has moved to the separation portion leaves the cracked portion, flows to both sides of the separation portion, and eventually falls to the top sheet.
Thus, since excrement is induced to fall to a top sheet via a guidance part, leakage of excrement can fully be controlled.

  In this way, by setting the bending resistance etc. to a predetermined range, not only can the abutment of the wearer's torn portion be made, but also the wearer's starch can be formed in advance by shaping the wearer's torn portion into a predetermined shape. It is good also as contact | abutting to a crack part.

  According to the present invention, one end of the top sheet is connected to the front center side of the top sheet in the longitudinal direction or from the center, and the other end is connected to the vicinity of the rear end in the longitudinal direction of the top sheet. The sheet faces the wearer's crack. Here, since the bending resistance in the direction in which the top sheet is arranged in the short direction is set to 120 mm or less, the top sheet is flexibly deformed and inserted into the narrow groove of the cracked portion, thereby causing unevenness of the skin. In close contact. Therefore, since the gap between the upper surface sheet and the wearer's skin is sufficiently filled, leakage of excrement can be sufficiently suppressed.

  Further, since the material for absorbing and holding the liquid is not substantially contained in the top sheet, the flexibility of the top sheet is not impaired. For this reason, the upper surface sheet is deformed flexibly and is inserted into a narrow groove of the cracked portion, and is in close contact with the unevenness of the skin. Therefore, since the gap between the upper surface sheet and the wearer's skin is sufficiently filled, leakage of excrement can be sufficiently suppressed.

Alternatively, since the abutment portion and the separation portion are provided in the guide portion, the gap between the abutment portion and the cracked portion is sufficiently filled, and the excrement supplied to the abutment portion is the groove of the cracked portion. Without being transmitted, it moves toward the separation part while contacting the cracked part and the contact part. Subsequently, the excrement that has moved to the separation portion leaves the cracked portion, flows to both sides of the separation portion, and eventually falls to the top sheet.
Thus, since excrement is induced to fall to a top sheet via a guidance part, leakage of excrement can fully be controlled.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of each embodiment other than the first embodiment, the same reference numerals are given to those common to the first embodiment, and the description thereof is omitted or simplified.

<First Embodiment>
[overall structure]
FIG. 1 is an overall perspective view of a disposable diaper 10 according to the first embodiment of the present invention. FIG. 2 is a plan view of FIG.

  As shown in FIGS. 1 and 2, a disposable diaper 10 (hereinafter simply referred to as “diaper 10”) as an absorbent article includes a liquid-permeable top sheet 20 and a liquid-impermeable back sheet 30. (See FIG. 3 to be described later) and a liquid-absorbing / absorbing absorber 40 interposed between the top sheet 20 and the back sheet 30. An upper surface sheet 50 is provided on the surface of the top sheet 20 opposite to the back sheet 30.

[Top sheet]
The top sheet 20 is for allowing the excrement to quickly permeate into the absorber 40 described later and to absorb and hold it. Such a top sheet 20 is preferably formed of a material that is less irritating to the skin. Examples of such a material include a hydrophilic non-woven fabric or woven fabric, a porous plastic film, and a hydrophobic material having an opening. A non-woven fabric, a film having pores, and the like can be used. The non-woven fabric here is a seascore type composite fiber formed of polyolefin, polyester, or polyamide fiber, as well as a spunbond, point bond, through air bond, chemical bond, meltblown, spunlace, or Further, it may be a side-by-side type composite fiber manufactured using a method such as a needle punch. Further, rayon, acetate, cotton, pulp, or a fibrous sheet in which a synthetic resin is used alone or combined so as to form a core-sheath structure can also be used.

  The shape and dimensions of the top sheet 20 are not particularly limited, but in the present embodiment, the longitudinal dimension is 450 mm to 700 mm (for example, 600 mm), and the lateral dimension is 150 mm to 300 mm (for example, 250 mm). It is substantially rectangular.

[Back sheet]
The back sheet 30 suppresses the excretion absorbed by the absorber 40 described later from permeating and leaking. Examples of such a backsheet 30 include a hydrophobic nonwoven fabric, a liquid-impermeable film, a sheet in which a hydrophilic nonwoven fabric and a liquid-impermeable film are laminated, a water-repellent nonwoven fabric, and a moisture-permeable plastic having fine pores. A film or a laminate thereof can be used. Among these, according to a moisture-permeable material, the stuffiness at the time of wearing is reduced and the discomfort given to a wearer can be reduced.

  The shape and dimensions of the backsheet 30 are not particularly limited as long as they are larger than the absorber 40 described later, but in this embodiment, the dimensions in the longitudinal direction are 450 mm or more and 700 mm or less (for example, 600 mm), and the dimensions in the short direction. It is a substantially rectangular shape of 150 mm or more and 350 mm or less (for example, 290 mm).

[Absorber]
The absorber 40 absorbs and holds excreta. As such an absorbent body 40, a combination of defibrated pulp and a superabsorbent polymer, a cellulose fiber, a thermoplastic resin, a superabsorbent polymer, a heat-fusible fiber, etc. mixed and heat-treated are preferable. used.

  In addition, when using what laminated | stacked the several layer, superabsorbent polymer may exist in any of an upper layer, a middle layer, and a lower layer, and may be mixed with the pulp. Further, as the superabsorbent polymer, those having the property of absorbing and maintaining excrement and gelling are preferable. Specifically, starch-acrylic acid (salt) graft copolymer, starch-acrylonitrile copolymer Examples include saponified products, cross-linked products of sodium carboxymethyl cellulose, and acrylic acid (salt) polymers.

  The shape and dimensions of the absorber 40 are not particularly limited, but in the present embodiment, the longitudinal dimension is 400 mm or more and 650 mm or less (for example, 530 mm), and the lateral dimension is 150 mm or more and 300 mm or less (for example, 250 mm). It is substantially rectangular.

[Top sheet]
3 is a cross-sectional view taken along line XX in FIG. 2, and FIG. 4 is a cross-sectional view taken along line YY in FIG.
In the present embodiment, the top sheet 50 has a substantially rectangular shape, and one end 51 is substantially at the center in the longitudinal direction of the top sheet 20 or the front end 21 side from the substantially center, and the other end 52 is the rear end in the longitudinal direction of the top sheet 20. 22 is connected in the vicinity. The connection between the top sheet 50 and the top sheet 20 is not particularly limited, and may be performed using a hot melt adhesive, heat fusion, pressure bonding, a hook-and-loop fastener, or the like.

  It is preferable that the material forming the top sheet 50 does not substantially contain a liquid absorption retention material. The material may be either liquid permeable or liquid impermeable, but is preferably liquid permeable in that urine and low-viscosity watery stool can be transferred onto the top sheet 20. In addition, the material of the upper surface sheet 50 may be liquid-impermeable in that the upper surface sheet 50 does not hold the excrement and the “smoothness” of the skin that comes into contact is maintained and is comfortable to the wearer. . Examples of the liquid-permeable material include hydrophilic nonwoven fabrics or woven fabrics and stretchable nonwoven fabrics. On the other hand, examples of the liquid-impermeable material include a hydrophobic nonwoven fabric, a liquid-impermeable film, and a sheet in which a hydrophilic nonwoven fabric and a liquid-impermeable film are bonded together.

(Elastic member)
The diaper 10 includes an elastic member 60 as length adjusting means or stretchability imparting means. A plurality of the elastic members 60 are arranged in the upper surface sheet 50 so as to extend along the longitudinal direction of the top sheet 20. Here, since the part between the one end 51 and the other end 52 in the top sheet 50 is not connected to the top sheet 20, it can be expanded and contracted in accordance with the shape change of the top sheet 20 during wearing.

  The elastic member 60 is not particularly limited as long as it has stretchable elasticity, and various kinds of materials such as natural rubber, synthetic rubber, polyurethane thread-like rubber, flat rubber, ribbon-like rubber, heat-shrinkable material, water-shrinkable shrinkable fiber, etc. It may be made of a material.

In the present embodiment, such a top sheet 50 in the natural state has a longitudinal dimension of 80 mm to 300 mm (for example, 200 mm), and a lateral dimension (W _U in FIG. 2) of 30 mm to 150 mm. Preferably they are 50 mm or more and 70 mm or less (for example, 60 mm). More preferably, W _U is equal to or greater than a distance between gathers 70a and 70b, which will be described later, when worn.

  The top sheet 50 is stretched in the longitudinal direction from 50 mm to 200 mm (for example, 150 mm), that is, the top sheet 20 with a length of 1.2 times to 3.0 times the natural length. It is connected to the. It is preferable to sandwich a length not less than 1.3 times and not more than 1.7 times the natural length.

[Bending softness]
In the present embodiment, when the top sheet 50 is contracted, the bending resistance measured by the cantilever method in the direction in which the top sheet 20 is arranged in the short direction is preferably 65 mm or more and 120 mm or less. Is 80 mm or more and 100 mm or less. In addition, what is necessary is just to measure the bending resistance in a natural state, when an upper surface sheet does not have a stretching property substantially.
The bending resistance here is measured by a procedure according to the JIS L 1096 cantilever A method.

[Tensile stress]
The top sheet 50 preferably has a tensile stress measured by a tensile stress test of 0.5 N or more and 3.0 N or less.
Moreover, it is preferable that the upper surface sheet 50 is configured so that the tensile stress becomes the highest value in the central portion 54 in the short-side direction and decreases toward the both side portions 53a and 53b in the short-side direction. Thereby, the excrement discharged | emitted by the center part 54 of the upper surface sheet 50 at the time of wear moves to the both side parts 53a and 53b with which the force with which the upper surface sheet 50 presses against a wearer's skin is weak, and to the top sheet 20 And it becomes easy to drop excrement.

The tensile stress test here is performed by the following procedure, for example.
First, the top sheet is cut into 350 mm × 30 mm (longitudinal direction × short direction) at the center in the longitudinal direction and the width direction to obtain a sample. Next, this sample is engaged with a plurality of chucks installed at intervals of 130 mm. Subsequently, using a tensile tester [for example, “Instron” (trade name)], the speed is 200 mm / min, 95% of the maximum extension length is the maximum value, and 85% of the maximum extension length is the intermediate value. The sample is stretched twice in a continuous cycle, and the tensile stress is measured when the sample returns to 85% of the maximum stretch length in the second cycle.

[gather]
The diaper 10 further includes gathers 70 a and 70 b disposed on both sides in the longitudinal direction of the top sheet 20. These gathers 70a and 70b suppress the leakage of excrement from the diaper side edge. Specifically, each of the gathers 70a and 70b includes a fixed end 71a and 71b joined to both side portions 23, the front end 21 and the rear end 22 of the top sheet 20, and a free end provided with an elastic member 73 in an expanded state. 72a, 72b.
Furthermore, the gathers 70a, 70b of the width _{(W G} in FIG. 2) in that it can effectively suppress the leakage of excrement is preferably 30mm or more 90mm or less (e.g., 60 mm).

  The gathers 70a and 70b are preferably formed of a material having air permeability. Examples of such a material include a water-repellent nonwoven fabric made of synthetic fibers made of a thermoplastic resin such as polyethylene, polypropylene, and polyester. Is mentioned. As the elastic member 73, a conventionally known material such as a natural or synthetic urethane thread, thread rubber, and flat rubber can be used.

  According to this embodiment, the following effects can be obtained.

Since one end 51 of the top sheet 50 is connected to the front end 21 side from the approximate center in the longitudinal direction of the top sheet 20, and the other end 52 is connected to the vicinity of the rear end 22 in the longitudinal direction of the top sheet 20, the top sheet 50 is worn when worn. Faces the wearer's crack.
Here, since the bending resistance of the top sheet 50 in the direction in which the top sheet 20 is arranged in the short direction is set to 120 mm or less, the top sheet 50 is flexibly deformed and inserted into a narrow groove of the cracked portion. It adheres to the unevenness of the skin. Therefore, since the gap between the top sheet 50 and the wearer's skin is sufficiently filled, the leakage of excrement can be sufficiently suppressed.

  Since the bending resistance of the upper surface sheet 50 in the direction in which the top sheet 20 is arranged in the short direction is set to 65 mm or more, leakage of excrement can be reliably suppressed.

  Since the elastic member 60 is provided along the longitudinal direction of the upper surface sheet 50, the upper surface sheet 50 contracts and a wrinkle is formed on the surface of the upper surface sheet 50. Since this wrinkle becomes a passage for excrement, the excrement is dropped onto the top sheet 20 and is easily absorbed and held by the absorber 40. And since the tensile stress of the upper surface sheet 50 was 0.5N or more and 3.0N or less, the excrement leak can be suppressed and the discomfort given to a wearer can be reduced.

  Since the top sheet 50 is connected to the top sheet 20 with a length of 1.2 times or more and 3.0 times or less of the natural length, leakage of excrement can be more sufficiently and reliably suppressed.

  Since the width | variety of the upper surface sheet 50 of the direction arrange | positioned in the transversal direction of the top sheet 20 was 30 mm or more and 150 mm or less, the leakage of excrement can be suppressed more fully.

  Since the gathers 70 a and 70 b are arranged on the both side portions 23 of the top sheet 20, it is possible to suppress the excrement dropped on the top sheet 20 from leaking from the both side portions 23. Furthermore, since the width | variety of the upper surface sheet 50 in the part connected to the rear end 22 vicinity was made more than the distance between the gathers 70a and 70b at the time of wear, the excrement which flowed near the rear end 22 is the upper surface sheet 50. It can be dammed up. For this reason, since the excrement dropped on the top sheet 20 can be prevented from leaking out from the rear end 22, the excretion leak can be more sufficiently suppressed.

  Since the material for absorbing and holding the liquid is not substantially contained in the top sheet 50, the flexibility of the top sheet 50 is not impaired. For this reason, the upper surface sheet 50 is deformed flexibly and is inserted into the narrow groove of the cracked portion, and is in close contact with the unevenness of the skin. Therefore, since the gap between the top sheet 50 and the wearer's skin is sufficiently filled, the leakage of excrement can be sufficiently suppressed.

Second Embodiment
FIG. 5 is a plan view of a diaper 10 </ b> A according to the second embodiment of the present invention. This embodiment is different from the first embodiment in that a belt 80 and a locking portion 25 are provided.

  That is, the diaper 10 </ b> A further includes a belt 80 connected to the rear end 32 side of the backsheet 30. Specifically, the belt 80 extends from the rear end 32 side of the back sheet 30 in the short direction of the back sheet 30, and an elastic member 81 extending along the extending direction is disposed in the belt 80. ing. Further, a connecting portion 83 is provided at one end 82a of the belt 80, and the one end 82a is detachably connected to the other end 82b through the connecting portion 83. As such a connection part 83, conventionally well-known things, such as a hook-and-loop fastener, can be used.

  In this embodiment, the belt 80 is formed of a substantially rectangular sheet member, and a hydrophilic nonwoven fabric or woven fabric, a stretchable nonwoven fabric, or the like can be used as the sheet member. The connection between the belt 80 and the back sheet 30 is not particularly limited, and may be performed using a hot melt adhesive, heat fusion, pressure bonding, a hook-and-loop fastener, or the like.

  The diaper 10 </ b> A further includes a locking portion 25 provided in the vicinity of the front end 21. In the present embodiment, the locking portion 25 is provided on the surface of the gathers 70 a and 70 b, but may be provided on the surface of the top sheet 20. As such a locking portion 25, a conventionally known one such as a hook-and-loop fastener can be used.

The usage method of the above diaper 10A is demonstrated referring FIG.
First, as shown in FIG. 6A, the diaper 10A is arranged on the back side of the wearer, and the belt 80 is wound around the wearer's waist. Here, since the belt 80 is provided with the elasticity provided by the elastic member 81, it can cope with the difference in the waist length of the wearer. Furthermore, the belt 80 is positioned by connecting the connecting portion 83 to the other end 82b.
Then, as FIG.6 (B) shows, the front-end side of 10 A of diapers is pulled up to a wearer's belly side through crotch. Furthermore, the diaper 10 </ b> A is worn by the wearer by locking the locking portion 25 to the belt 80.

  According to this embodiment, in addition to the effect by 1st Embodiment, the following effect is obtained.

  When the belt 80 is fixed around the waist of the wearer at the time of wearing, the diaper 10A is further extended in the short direction, so that the top sheet 50 is also extended in the short direction. Thereby, the twist and slack of the upper surface sheet 50 are suppressed, and the gap between the upper surface sheet 50 and the wearer's skin is filled. Therefore, since the upper surface sheet 50 adheres more closely to the wearer's skin, leakage of excrement can be further suppressed.

  When the belt 80 is fixed around the waist of the wearer when worn, the diaper 10A is less likely to be displaced in the longitudinal direction and the lateral direction even if the wearer changes posture or moves. Thereby, the state which the upper surface sheet | seat 50 extended | stretched is maintained, while being fully spaced apart from the top sheet | seat 20, it contact | abuts to a wearer's skin with sufficient tensile stress. Moreover, it is prevented that the upper surface sheet | seat 50 shift | deviates to a transversal direction, and moves to the position which does not oppose the groove | channel of a wearer's cracked part. Therefore, leakage of excrement can be further suppressed.

<Third Embodiment>
FIG. 7 is an overall perspective view of a diaper 10B according to the third embodiment of the present invention. This embodiment is different from the first embodiment in that a guiding portion 90 is provided instead of the top sheet 50.

  In other words, the diaper 10 </ b> B further includes a string-shaped guide portion 90 disposed in the approximate center of the top sheet 20 in the short direction. One end 91 of the guide portion 90 is connected to the front end 21 side of the center of the top sheet 20 in the longitudinal direction, and the other end 92 is connected to the vicinity of the rear end 22 of the top sheet 20 in the longitudinal direction. .

  The guide portion 90 is formed so as to be able to contact the wearer's cracked portion. In the present embodiment, the guide portion 90 has a substantially circular cross section having a diameter of 10 mm or less, and the elastic member 60 extends in the longitudinal direction inside. Are arranged as follows. Thereby, at the time of wearing, the guidance part 90 expand | extends and is inserted also in the narrow groove | channel of a wearer's cracked part. At this time, the central portion in the width direction of the guide portion 90 acts as a contact portion that comes into contact with the crack portion, and both side portions in the width direction of the guide portion 90 act as spacing portions that are separated from the crack portion. .

  Such a guide part 90 may be formed of various materials. In other words, it may be formed of a material having any of the characteristics of liquid permeability or liquid impermeability, liquid absorption retention or liquid non-absorption retention. In addition, a plurality of elastic members 60 as length adjusting means and stretchability imparting means are arranged inside the guiding portion 90 so as to extend along the longitudinal direction of the top sheet 20. Here, since the part between the one end 91 and the other end 92 in the guiding portion 90 is not connected to the top sheet 20, it can expand and contract in accordance with the shape change of the top sheet 20 at the time of wearing.

  According to this embodiment, the following effects can be obtained.

Since one end 91 of the guide portion 90 is connected to the front end 21 side from the approximate center in the longitudinal direction of the top sheet 20 and the other end 92 is connected to the vicinity of the rear end 22 in the longitudinal direction of the top sheet 20, the guide portion 90 is worn when worn. Faces the wearer's crack.
Here, since the guide part 90 is formed so as to be able to contact the wearer's cracked part, the guide part 90 is inserted into a narrow groove of the cracked part, and the center in the width direction of the guide part 90 hits the cracked part. In addition, both side portions in the width direction are separated from the cracked portion. Therefore, since excrement is induced to fall to the top sheet 20 via the induction part 90, the excretion leak can be sufficiently suppressed.

[Modification]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention. For example, in the above-described embodiment, the elastic member is used to impart elasticity to the top sheet and the guide part. However, the present invention is not limited thereto, and the top sheet and the guidance part are made of a stretchable material to provide elasticity. May be. Moreover, in the said embodiment, although the diaper 10 was made into the tape type, it is not restricted to this, A pants type may be sufficient. In addition, there are the following modifications.

[Modification 1]
FIG. 8 is a plan view of a diaper 10C according to the first modification of the present invention. In the first modification, the shape of the top sheet 50C is different from that of the first embodiment.
That is, the width of the top sheet 50C gradually decreases from the rear end 22 side of the top sheet 20 toward the front end 21 side. Specifically, the width W2 on the rear end 22 side is 60 mm or more and 150 mm or less (for example, 100 mm), and the width W1 on the front end 21 side is 30 mm or more and 80 mm or less (for example, 60 mm).

  According to Modification 1 described above, the following functions and effects are obtained in addition to the functions and effects of the first embodiment.

  Even when the portion of the diaper 10C facing the crotch is pressed by the wearer's foot and becomes narrower, the width W1 of the one end 51 of the upper surface sheet 50C is narrow, so the upper surface sheet 50C is less likely to get on the gathers 70a and 70b. . Therefore, since excrement falls on top sheet 20 from both sides 53a and 53b of upper surface sheet 50C, without being obstructed by gathers 70a and 70b, leakage of excrement can be controlled more.

[Modification 2]
9 and 10 are plan views of diapers 10D and 10E according to Modification 2 of the present invention. In the second modification, the shapes of the top sheets 50D and 50E are different from the first modification.
That is, the slits 55 are provided on the other end 52 side of the top sheets 50D and 50E. Specifically, the upper sheet 50D is provided with one slit 55, and the upper sheet 50E is provided with two slits 55. Thus, the number of installation locations of the slit 55 is not particularly limited.

  According to Modification 2 described above, the following functions and effects can be obtained.

  When extreme water-soluble stool is discharged, there is a concern that excrement may leak through an extremely narrow gap between the top sheets 50D and 50E and the wearer's skin. Therefore, since the slit 55 is provided on the other end 52 side of the top sheets 50D and 50E, extreme water-soluble feces also fall onto the top sheet 20 from the slit 55. Therefore, since extreme water-soluble stool is also absorbed by the absorber 40, it is possible to reliably suppress excretion leakage.

[Modification 3]
FIG. 11 is a cross-sectional view of a diaper 10F according to Modification 3 of the present invention. More specifically, it is a cross-sectional view of the diaper 10F at a substantially central portion in the longitudinal direction of the top sheet 50F. In Modification 3, the configuration of the top sheet 50F is different from that of the first embodiment.
That is, the upper surface sheet 50F is supported by the support portion 56 that protrudes from the approximate center of the top sheet 20 in the short direction. As shown in FIG. 12, the support portion 56 is not particularly limited as long as it is a material having a strength not to be crushed when being pressed against the wearer's cracked portion 500 when worn. For example, it may be formed of urethane foam.
The height of the support portion 56 is not particularly limited, but may be 10 mm or more and 40 mm or less.

  According to Modification 3 described above, the following functions and effects can be obtained.

  Since the upper surface sheet 50F is supported by the support portion 56, the upper surface sheet 50F is strongly inserted into the groove of the wearer's cracked portion 500. For this reason, since the clearance gap between the upper surface sheet | seat 50F and the groove | channel of a wearer's crack part is filled more reliably, the leakage of excrement can be suppressed more fully and reliably.

1 is an overall perspective view of an absorbent article according to a first embodiment of the present invention. It is a top view of FIG. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is the YY sectional view taken on the line of FIG. It is a top view of the absorptive article concerning a 2nd embodiment of the present invention. It is a figure which shows the use condition of the absorbent article which concerns on the said embodiment. It is a whole perspective view of the absorptive article concerning a 3rd embodiment of the present invention. It is a top view of the absorptive article concerning modification 1 of the present invention. It is a top view of an absorptive article concerning modification 2 of the present invention. It is a top view of an absorptive article concerning modification 2 of the present invention. It is sectional drawing of the absorbent article which concerns on the modification 3 of this invention. It is a figure which shows the use condition of the absorbent article which concerns on the said modification.

Explanation of symbols

10 Disposable diapers (absorbent articles)
20 Top sheet 21 Front end 22 Rear end 30 Back sheet 40 Absorber 50 Top sheet 51 One end 52 Other end 60 Elastic member (length adjusting means, stretchability providing means)
70 gather 90 guide

Claims (9)

An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbing / holding absorber interposed between the top sheet and the back sheet,
One end side is connected to the front center side in the longitudinal direction of the top sheet or to the front end side from the approximate center, and the other end side is connected to the vicinity of the rear end in the longitudinal direction of the top sheet. Further comprising a top sheet
The top sheet includes a sheet-like member, a plurality of elastic members that extend along the longitudinal direction of the top sheet and that are spaced apart in the lateral direction, and are provided on the other end side. A slit formed so as to gradually narrow from the end side toward the center side in the longitudinal direction ,
An absorbent article having a bending resistance measured by a JIS L 1096 cantilever A method in a direction arranged in a short direction of the top sheet of 120 mm or less.   The absorbent article according to claim 1, wherein the bending resistance is 65 mm or more.   The absorbent article according to claim 2, wherein the bending resistance is 80 mm or more and 100 mm or less.   The absorptive article according to any one of claims 1 to 3 whose tensile stress in the state where said top sheet was extended to 85% of the maximum extension length is 0.5N or more and 3.0N or less.   The absorbent article according to claim 4, wherein the top sheet is connected to the top sheet with a length of 1.2 times or more and 3.0 times or less of a natural length.   The absorbent article according to any one of claims 1 to 5, wherein the top sheet has a width in a direction in which the top sheet is arranged in a short direction of the top sheet of 30 mm or more and 150 mm or less.   The absorptive article according to claim 6 whose width of the direction where said top sheet is arranged in the transversal direction of said top sheet is 50 mm or more and 70 mm or less. Further comprising gathers disposed on both sides of the top sheet in the longitudinal direction;
8. Any one of claims 1 to 7, wherein the top sheet has a width in a direction arranged in a short direction of the top sheet at a portion connected in the vicinity of the rear end equal to or more than a distance between the gathers when worn. An absorbent article as described above. An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-absorbing / holding absorber interposed between the top sheet and the back sheet,
One end side is connected to the front center side in the longitudinal direction of the top sheet or to the front end side from the approximate center, and the other end side is connected to the vicinity of the rear end in the longitudinal direction of the top sheet. Further comprising a top sheet
The top sheet includes a sheet-like member, a plurality of elastic members that extend along the longitudinal direction of the top sheet and that are spaced apart in the lateral direction, and are provided on the other end side. A slit formed so as to gradually narrow from the end side toward the center side in the longitudinal direction ,
Absorbent articles in which the material that absorbs and holds liquid does not contain 1% by mass or more of the entire top sheet .

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