JP4094840B2 - Disposable paper diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable paper diaper.
[0002]
[Prior art]
Conventionally, disposable paper diapers, like a paper diaper 101 shown in a developed view in FIG. 4, are a liquid-permeable top sheet 102, a liquid-impermeable back sheet (not shown), and the top sheet 102 and the back sheet. And an absorbent body 104 interposed therebetween, and is used by being attached to a crotch portion of a human body with the top sheet 102 side inward.
The disposable paper diaper 101 has leg circumference portions 101a on both sides, a crotch portion 101b is formed between the leg circumference portions 101a and 101a, and one side sandwiching the crotch portion 101b is an abdominal side portion 101c and the other side. Is the dorsal side portion 101d. The absorber 103 is widely interposed from the abdominal part 101c to the crotch part 101b and the dorsal part 101d, and is formed so that a considerable amount of water-like components due to urination and defecation can be absorbed. Such an absorber 103 is a material that can absorb a water-like component, and is made of, for example, pulp or a superabsorbent polymer.
In recent years, in such disposable paper diapers 101, attempts have been made to increase the amount of absorption of the water-like component by configuring the absorbent body 103 with two or more absorbent layers.
[0003]
[Problems to be solved by the invention]
However, for example, when the wearer of the disposable paper diaper 101 divides a small amount of urine into several urines or when it is used for a long time, the pulp of the absorbent body 103 or the like near the position where urination is performed In some cases, the absorption capacity of the polymer may be reduced, or the superabsorbent polymer may cause a gel block and hinder liquid permeation. In such a case, the absorber 103 cannot fully exhibit the absorbing power, which causes inconveniences such as urine leakage.
[0004]
The subject of this invention is providing the disposable paper diaper which prevents a leak and can make an absorber exhibit sufficient absorption power.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is, for example, as shown in FIG.
A liquid permeable sheet (top sheet 2), a liquid impermeable sheet (back sheet 3), and an absorbent body (4) interposed between the liquid permeable sheet and the liquid impermeable sheet, In disposable paper diapers (1) having
To be substantially along only a part of the abdominal side of the absorbent body in the longitudinal direction and a part of both sides in the width direction continuous from the side of the abdominal side on the liquid permeable sheet side of the abdominal side of the absorbent body A thicker part (43) thicker than the central part ,
Three-dimensional gathers (G) that stand on the liquid permeable sheet with the thick-walled portion as a starting point;
Is provided.
[0006]
According to the first aspect of the present invention, on the liquid-permeable sheet side of the absorbent body, on the ventral end portion in the longitudinal direction of the absorbent body and on a part of both side portions in the width direction continuous from the ventral end portion. Since the thick part thicker than the central part is formed so as to be substantially only along, the urine and the like are prevented from leaking to the outside by the thick part and are retained by the absorber.
Specifically, for example, when urine is urinated in several parts, even if the urine absorbability is reduced in a part of the absorber, the urine is retained by the thick-walled portion, whereby the absorber Since the urine and the like can be absorbed by the portion having the absorbing power, leakage of urine and the like from the disposable paper diaper can be prevented, and the absorber can exhibit sufficient absorbing power.
In addition, since the three-dimensional gather provided in the liquid-permeable sheet stands up with the thick-walled portion as the starting point, a space for holding until urine or the like is absorbed by the absorber is formed in the inner part of the paper diaper. .
Therefore, urine and the like are further prevented from leaking out from the side of the thick part. Moreover, since urine etc. can be kept on an absorber, even if absorption power falls in a part of an absorber, urine etc. is stuck on an absorber, diffuses on an absorber, and absorbs power. Since it is absorbed in a certain location, it is possible to make the absorbent more effective.
[0007]
Moreover, in the disposable paper diaper of Claim 1, as described in Claim 2,
The absorbent body is a first absorbent body (41) provided from the stomach side to the back side of the disposable paper diaper;
On the surface of the abdominal side of the first absorbent body on the liquid permeable sheet side, the abdominal side end in the longitudinal direction of the first absorbent body and both sides in the width direction continuous from the abdominal side end . A second absorbent body (42) provided so as to be substantially along only a part thereof;
With
The thick part is formed by the first absorber and the second absorber ,
The first absorber comprises a polymer,
The second absorber may be so that comprise a polymer having low diffusivity and liquid permeability than the first absorbent body.
[0008]
According to the invention described in claim 2, it is needless to say that the same effect as that of the invention described in claim 1 can be obtained. In particular, the thick portion is formed by the first absorber and the second absorber. Therefore, it is easy to form the thick portion and change the thickness as compared with the case where the central portion and the thick portion are integrated.
Further, the second absorber formed using a polymer having low liquid permeability allows the absorber to be absorbed by the second absorber even when liquid flows on the surface of the first absorber toward the peripheral portion, for example, on the ventral side. Leakage outside can be prevented.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. Fig.1 (a) shows the surface by the side of the human body at the time of wear with the expanded view of the paper diaper (disposable paper diaper) 1 of this invention, FIG.1 (b) is AA 'of the paper diaper 1 of Fig.1 (a). FIG. In the present embodiment, a paper diaper mainly used for men will be described.
The paper diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3 provided on the back surface of the top sheet 2, and an absorbent body 4 interposed between the top sheet 2 and the back sheet 3. The gathered nonwoven fabrics 5 and 5 provided on both side portions of the paper diaper 1 on the top sheet 2 side, and fastening tapes 6 and 6 used when the paper diaper 1 is mounted are mainly configured.
The paper diaper 1 covers the crotch part of the human body from the abdomen side to the back side, and one end part forms the abdomen side part 1a and the other end part forms the back side part 1b. Further, a crotch portion 1c is formed between the abdominal side portion 1a and the back side portion 1b. Both sides of the crotch 1c are recessed inward to form leg surrounding portions 1d and 1d.
[0012]
The absorbent body 4 is made of a material in which pulp and a super absorbent polymer (SAP) are laminated at a ratio of about 50:50, and includes a first absorbent body 41 and a second absorbent body 42. It is comprised by.
[0013]
The 1st absorber 41 is manufactured using a polymer with comparatively high diffusibility and liquid permeability. For example, it is preferable to produce the polymer using a highly liquid-permeable polymer having a pressurized liquid flow rate of 15 ml / min or more because absorption of urine and the like is accelerated.
The 1st absorber 41 is formed so that it may be interposed ranging from the stomach side part 1a of the paper diaper 1 to the back side part 1b.
[0014]
The second absorbent body 42 is manufactured using at least a polymer having lower diffusibility and liquid permeability than the first absorbent body 41.
As shown in FIG. 1, the second absorbent body 42 includes an abdominal end portion 41 a (at least one longitudinal end portion of the absorbent body) of the first absorbent body 41 and ventral side portions 41 b and 41 b ( The first absorbent body 41 is provided in a U-shape on the side of the top sheet 2 so as to be substantially along (at least a part of both sides in the width direction continuous from the end portion). That is, the absorbent body 4 is formed such that the peripheral part on the ventral side is thicker than the central part by disposing the second absorbent body 42 on the first absorbent body 41. A portion where the second absorber 42 is provided is referred to as a thick portion 43 of the absorber 4.
In this way, the second absorber 42 formed using a polymer having low liquid permeability allows the second absorber 42 to flow even when the liquid flows on the surface of the first absorber 41 toward the peripheral portion in the ventral portion 1a. Leakage to the outside of the absorber 4 is prevented by the absorber 42.
[0015]
The top sheet 2 is formed of a nonwoven fabric or a film that is liquid permeable and has been subjected to durable hydrophilic treatment.
The back sheet 3 is formed of a liquid-impermeable film made of polyethylene or the like, or a non-woven fabric bonded to a gas-permeable liquid-impermeable film.
[0016]
The top sheet 2 and the back sheet 3 extend around the absorbent body 4 and are overlapped at the abdomen side portion 1a, the back side portion 1b, and the leg surrounding portions 1d and 1d, respectively, and a hot melt adhesive And so on. The back sheet 3 extends to the side of the top sheet 2 as shown in FIG.
[0017]
On both sides of the top sheet 2, gathered nonwoven fabrics 5, 5 are disposed over substantially the entire area from the abdomen side 1 a to the back side 1 b. The gathered non-woven fabrics 5 and 5 are overlapped on the back sheet 3 and the top sheet 2 extending in the lateral direction, extending from the side end portions 5a and 5a to the location on the side portion 42a of the second absorbent body 42. The sheet 3 and the top sheet 2 are fixed with a hot melt adhesive or the like. And the inner edge parts 5b and 5b of the gathered nonwoven fabrics 5 and 5 are double-folded along the longitudinal direction of the paper diaper 1 (from the abdomen side part 1a to the back side part 1b). Elastic rubber 51, 51 is disposed. With the elastic rubbers 51, 51, the gathered nonwoven fabrics 5, 5 stand up from the top sheet 2 starting from the location above the side part 42 a of the second absorbent body 42 when the disposable diaper 1 is used, and the three-dimensional gather G , G are formed.
The gathered nonwoven fabrics 5 and 5 are in close contact so that the end portions 5b and 5b are pressed against the wearer's crotch when the paper diaper 1 is used, partitioning the side and the inside of the paper diaper 1, and urine etc. on the side of the paper diaper 1 This prevents the outside from leaking to the outside, and forms a space on the top sheet 2 for holding the paper diaper 1 until urine or the like is absorbed by the absorbent body 4.
[0018]
The fastening tape 6 is composed of a hook-and-loop fastener, an adhesive tape, or the like, and is provided so as to protrude from the paper diaper 1 back side portion 1b to both sides. On the other hand, an affixing tape (not shown) to which the fastening tape 6 is detachable is provided on the abdominal side portion 1a of the back sheet 3.
[0019]
The paper diaper 1 covers the crotch part 1c between the legs of the wearer and covers the fastening tapes 6 and 6 so that the abdomen 1a and the dorsal part 1b touch the abdomen and the back of the wearer, respectively. It is worn on the human body by being fastened to the wearing tape.
When the disposable diaper 1 is attached to a human body (male), the genitals are located between the U-shaped second absorbers 42. Therefore, in the ventral portion 1a of the disposable diaper 1, even if the disposable diaper is used for a long time, even if the absorbent capacity is reduced at a part of the first absorbent body 41 and urine flows to the peripheral portion, the thick portion 43 prevents leakage of urine or the like from the disposable diaper 1. Moreover, urine etc. are stopped by the thick part 43, urine etc. are spread | diffused on the absorber 4, and are absorbed in the location with an absorptivity. Therefore, the absorber 4 can sufficiently exhibit the absorbing power.
[0020]
Further, since the gathered nonwoven fabrics 5 and 5 are provided on the top sheet 2 so that the three-dimensional gathers G and G stand up from above the second absorbent body 42, when the disposable diaper 1 is mounted, the three-dimensional gather G is provided. The end portion 5b is in close contact with the wearer so that the inner side and both sides of the paper diaper 1 are separated from each other. Accordingly, urine or the like is prevented from leaking from both sides of the paper diaper 1 to the outside.
In addition, a space for holding the urine or the like until the urine is absorbed is formed on the top sheet 2 by the three-dimensional gathers G and G. Etc. are fastened on the top sheet 2 and diffused on the absorbent body 4 and absorbed at a portion having an absorptive power. Therefore, the absorbing power of the absorber 4 can be further exerted.
[0024]
Here, as a specific example of the sheet-like absorbent body forming the first absorbent body 41 described above, for example, an airlaid absorbent body (Leonia: Novathin (registered trademark)), an SAP nonwoven fabric composite (JATI (Japan Absorber Technology) Laboratory): Megathin (registered trademark), etc. are manufactured.
[0025]
In addition, when the paper diaper 1 in the said embodiment is used for men, as mentioned above, the thick part is formed in the edge part and both sides of the abdominal part 1a, and the circumference | surroundings of the whole genitals are covered. Therefore, leakage of urine and the like is prevented even when the wearer's body position changes.
[0026]
In the present invention, for example, the first absorber and the second absorber may be integrally formed, and the second absorber (thick portion) may be formed in a U shape. The ratio of the absorbent pulp and SAP is not limited to the above, and can be changed as appropriate.
Furthermore, you may form a 1st absorber and a 2nd absorber with the same superabsorbent polymer. This is because leakage of urine or the like can be prevented by forming at least a thick portion even if the polymer forming the second absorbent body has diffusibility.
In addition, the present invention may be applied to a pants-type disposable diaper.
[0027]
【The invention's effect】
According to the first aspect of the present invention, even if the absorption capacity of urine is reduced in a part of the absorber, the urine or the like is retained on the absorption body by the thick-walled portion, and the urine or the like is absorbed by the portion having the absorption capacity. be able to. Therefore, leakage of urine or the like from the disposable paper diaper can be prevented, and the absorbent body can exhibit a sufficient absorbing power.
Moreover, the inside and side of a paper diaper are partitioned off by the three-dimensional gather. In addition, a space for holding urine or the like is created by the three-dimensional gather until urine or the like is absorbed by the absorber. Therefore, it is possible to further prevent urine etc. from leaking to the side of the thick part, and urine etc., which is retained on the absorbent body, diffuses on the absorbent body and is absorbed at a place where there is an absorbency, Absorbing power can be further exerted by the absorber.
According to the invention described in claim 2, it is needless to say that the same effect as that of the invention described in claim 1 can be obtained. In particular, the thick portion is formed by the first absorber and the second absorber. Therefore, it is easy to form the thick portion and change the thickness as compared with the case where the central portion and the thick portion are integrated.
Further, the second absorber formed using a polymer having low liquid permeability allows the absorber to be absorbed by the second absorber even when liquid flows on the surface of the first absorber toward the peripheral portion, for example, on the ventral side. Leakage outside can be prevented.
[Brief description of the drawings]
FIG. 1 shows a paper diaper to which the present invention is applied, wherein (a) is a developed view on the top sheet side, and (b) is a cross-sectional view taken along the line AA ′ of the paper diaper of (a).
FIG. 2 is a development view of the top sheet side of a conventional paper diaper.
[Explanation of symbols]
1 disposable diaper (disposable disposable diaper)
2 Top sheet (liquid permeable sheet)
3 Back sheet (liquid impervious sheet)
4 Absorber 41 First Absorber (Absorber)
42 Second absorber (absorber)
43 Thick part 5 Gather non-woven fabric G Solid gather

Claims (2)

In a disposable paper diaper having a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body interposed between the liquid-permeable sheet and the liquid-impermeable sheet from the ventral part to the back part. ,
To be substantially along only a part of the abdominal side of the absorbent body in the longitudinal direction and a part of both sides in the width direction continuous from the side of the abdominal side on the liquid permeable sheet side of the abdominal side of the absorbent body , Thick part thicker than the central part ,
Three-dimensional gathers that stand on the liquid permeable sheet with the thick part as a starting point,
A disposable paper diaper characterized by being provided with. The disposable paper diaper according to claim 1,
The absorbent body is a first absorbent body provided from the stomach side to the back side of the disposable paper diaper;
On the surface of the abdominal side of the first absorbent body on the liquid permeable sheet side, the abdominal side end in the longitudinal direction of the first absorbent body and both sides in the width direction continuous from the abdominal side end. A second absorber provided substantially along only a part,
With
The thick portion is formed by the first absorber and the second absorber,
The first absorber comprises a polymer,
The disposable diaper, wherein the second absorbent body includes a polymer having lower diffusibility and liquid permeability than the first absorbent body.

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