JP2003153948A - Disposable paper diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable paper diaper capable of preventing the leakage of urine and the like, while allowing an absorber to fully exhibit its absorption capability. SOLUTION: The paper diaper 1 is constructed mainly of a fluid-permeable top sheet 2, a fluid-impermeable back sheet 3 provided on the back face of the top sheet 2, and the absorber 4 interposed between the top sheet 2 and the back sheet 3. A thick wall part 43 is provided on the top sheet 2 side of the absorber 4. The thick wall part 43 is formed to approximately extend along the ends of the absorber 4 and the peripheral edges of both sides of the absorber. Starting from the sides corresponding to the thick wall part 43, three- dimensional gathers G and G standing on the paper diaper 1 are provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a disposable diaper.

[0002]

2. Description of the Related Art Conventional disposable diapers have a liquid-permeable top sheet 102 and a liquid-impermeable back sheet (not shown) like a disposable diaper 101 shown in an exploded view in FIG.
And an absorber 104 interposed between the top sheet 102 and the back sheet, and is used by being attached to the crotch of the human body with the top sheet 102 side facing inward. The disposable paper diaper 101 has leg-surrounding portions 101a formed on both sides thereof, and the leg-surrounding portions 101a, 101a.
There is a crotch part 101b between the crotch part 101 and the crotch part 101b
One side sandwiching b is the ventral side portion 101c, and the other side is the back side portion 1
It is 01d. The absorber 103 has a ventral side portion 101c.
It is widely inserted from the crotch portion 101b to the back side portion 101d, and is formed so that a considerable amount of water-like components due to urination or defecation can be absorbed. Such an absorber 10
3 is a material that can absorb water-like components, such as pulp,
It is composed of a super absorbent polymer. In recent years, in such disposable diapers 101, attempts have been made to increase the absorption amount of the water-like component by forming the absorbent body 103 with two or more absorbent body layers.

[0003]

However, for example, when the wearer of the disposable paper diaper 101 urinates a small amount of urine in several times, or when the diaper 101 is used for a long time, the vicinity of the urinating position is In some places, the absorbency of the pulp or the like of the absorbent body 103 may be reduced, or the superabsorbent polymer may cause a gel block to hinder liquid permeation. In such a case, the absorbent body 103 cannot sufficiently exhibit the absorbing power, which causes inconvenience such as urine leakage.

An object of the present invention is to provide a disposable paper diaper capable of preventing leakage and allowing the absorbent body to exert sufficient absorbing power.

[0005]

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 absorber (4) interposed between the liquid permeable sheet and the liquid impermeable sheet, In the disposable paper diaper (1) having the above, at least one of the ventral side portion and the back side portion of the absorbent body is provided on the liquid permeable sheet side, and at least one longitudinal end portion of the absorbent body and A thick portion (43) thicker than the central portion is provided so as to substantially extend along at least a part of both side portions in the width direction continuous from the end portion.

According to the first aspect of the present invention, at least one longitudinal end portion of the absorbent body and both side portions in the width direction continuous from the end portion are provided on the liquid-permeable sheet side of the absorbent body. Since the thick portion thicker than the central portion is formed so as to substantially follow a part, urine or the like is prevented from leaking to the outside by the thick portion and is retained in the absorber. Specifically, for example, when urine is excreted in several times, even if the absorption capacity of urine is reduced in a part of the absorber, Since it is possible to absorb urine and the like in the absorbent portion of the, it is possible to prevent the leakage of urine and the like from the disposable diaper, and
It is possible to make the absorber exhibit sufficient absorbing power.

Further, in the disposable paper diaper according to claim 1, as described in claim 2, the absorbent body comprises a first absorbent body (41) provided from a ventral side portion to a back side portion of the disposable paper diaper, From at least one of the abdominal portion and the dorsal portion of the first absorbent body to the liquid permeable sheet side surface, at least one longitudinal end portion of the first absorbent body and this end portion A second absorber (42) provided substantially along at least a part of both side portions in the continuous width direction, wherein the thick portion is formed by the first absorber and the second absorber. It may be formed.

According to the second aspect of the invention, it is needless to say that the same effect as that of the first aspect of the invention can be obtained, and in particular, the thick portion has the first absorber and the second absorber. Since it is formed by, it is easier to form the thick portion and change the thickness as compared with the case where the central portion and the thick portion are integrated.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the disposable paper diaper described in [1], the liquid permeable sheet is provided with a solid gather (G) standing upright with the thick portion as a standing point.

According to the third aspect of the present invention, the three-dimensional gathers provided on the liquid permeable sheet stand up with the thick portion as an upright point. Therefore, the urine or the like is retained until it is absorbed by the absorber. A space is formed in the inner part of the disposable diaper. Therefore, urine and the like is further prevented from leaking outside from the side of the thick portion. Further, since urine and the like can be retained on the absorbent body, even if the absorbency is reduced at a part of the absorbent body, urine and the like are retained on the absorbent body and diffused on the absorbent body to absorb the absorbent power. Since it is absorbed at a certain place, it is possible to further exert the absorbing power by the absorber.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a development view of a disposable diaper (disposable disposable diaper) 1 of the present invention, showing a surface on the side of a human body when worn, and FIG. 1 (b) is A- of the disposable diaper 1 of FIG. 1 (a).
The cross section in A'section is shown. In addition, this Embodiment demonstrates the disposable diaper mainly used for men. 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 absorber 4 interposed between the top sheet 2 and the back sheet 3. The gathering nonwoven fabrics 5 and 5 provided on both sides of the top sheet 2 side of the disposable diaper 1 and the fastening tapes 6 and 6 used when the disposable diaper 1 is attached are mainly configured. The disposable diaper 1 covers the crotch part of the human body from the abdominal side to the dorsal side, and one end forms the abdominal part 1a and the other end forms the dorsal part 1b. Further, the crotch portion 1c is located between the abdominal portion 1a and the back portion 1b.
Has become. Both sides of the crotch portion 1c are recessed inward to form leg-surrounding portions 1d and 1d.

The absorbent body 4 is made of a material in which pulp and super absorbent polymer (SAP: Super Absorbent Polymer) are laminated in a ratio of about 50:50. The first absorbent body 41 and the second absorbent body 2 And the absorber 42.

The first absorber 41 is made of a polymer having a relatively high diffusivity and liquid permeability. For example, it is preferable to manufacture using a polymer having a high liquid permeability, which has a pressurized liquid flow rate of 15 ml / min or more, because absorption of urine and the like becomes quick. The first absorbent body 41 is formed so as to be interposed between the abdominal part 1a and the back part 1b of the diaper 1.

The second absorbent body 42 is made of at least a polymer having lower diffusivity and liquid permeability than the first absorbent body 41. As shown in FIG. 1, the second absorbent body 42 includes an abdominal end portion 41a of the first absorbent body 41 (at least one longitudinal end portion of the absorbent body) and an abdominal side portions 41b and 41b.
It is provided in a U-shape on the side of the top sheet 2 of the first absorbent body 41 so as to substantially follow (at least a part of both side portions continuous from the end portion in the width direction). That is, absorber 4
The second absorbent body 42 is arranged on the first absorbent body 41 so that the peripheral portion on the ventral side is thicker than the central portion. Where the second absorber 42 is provided,
It is referred to as the thick portion 43 of the absorber 4. As described above, even if the liquid flows toward the peripheral portion on the surface of the first absorbent body 41, for example, in the abdominal portion 1a, the second absorbent body 42 formed of the polymer having low liquid permeability does not The absorber 42 is adapted to prevent leakage to the outside of the absorber 4.

The top sheet 2 is formed of a non-woven fabric, a film or the like which is liquid-permeable and has been subjected to a durable hydrophilic treatment.
The back sheet 3 is formed of a liquid impermeable film made of polyethylene or the like, or a breathable liquid impermeable film laminated with a nonwoven fabric.

The top sheet 2 and the back sheet 3 extend around the absorbent body 4 and are arranged on the abdominal side 1a, the back side 1b,
The ends are overlapped by the leg-surrounding portions 1d and 1d, and they are fixed to each other by a hot melt adhesive or the like. still,
As shown in FIG. 1B, the backsheet 3 extends laterally beyond the topsheet 2.

On both sides of the top sheet 2, there are ventral side portions 1a.
The gathered non-woven fabrics 5 are arranged over substantially the entire area from the back side portion 1b. Gathered nonwoven fabric 5,
5 is superposed on the backsheet 3 and the topsheet 2 which extend laterally, and the second end 5a
The back sheet 3 and the top sheet 2 are fixed to the back sheet 3 and the top sheet 2 with a hot melt adhesive or the like over a portion on the side portion 42a of the absorber 42. And the inner end 5 of the gathered nonwoven fabric 5,5
b and 5b are double-folded along the longitudinal direction of the diaper 1 (from the ventral side portion 1a to the back side portion 1b), and the thread-like elastic rubbers 51 and 51 are disposed inside the folded back portions. There is. Due to the elastic rubbers 51, 51, the gathered nonwoven fabrics 5, 5 stand up from the top sheet 2 starting from a position above the side portion 42a of the second absorbent body 42 when the disposable diaper 1 is used, and the gathered non-woven fabric G. , G are formed. The gathered non-woven fabrics 5 and 5 are adhered 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 so that urine and the like are on the side of the paper diaper 1. While preventing leakage from one side to the outside, while absorbing urine and the like in the absorber 4,
It plays a role of forming a space on the top sheet 2 for retaining the paper on the diaper 1.

The fastening tape 6 is composed of a surface fastener or an adhesive tape, and is provided so as to project from the back side portion 1b of the diaper 1 to both sides. On the other hand, on the abdominal portion 1a of the back sheet 3, an adherend tape (not shown) to which the fastening tape 6 can be attached and detached is provided.

In the paper diaper 1, the crotch part 1c is sandwiched between both legs of the wearer, and the abdominal part 1a and the back part 1b are respectively applied to the abdomen and the back part of the wearer, and the fastening tape 6,
By attaching 6 to the adherend tape, it is attached to the human body. When the paper diaper 1 is attached to a human body (male), the genitals are located between the U-shaped second absorbent bodies 42. Therefore, in the abdominal portion 1a of the disposable diaper 1, even if the absorbency is reduced at a part of the first absorbent body 41 and urine or the like flows to the peripheral portion due to, for example, the use of a disposable diaper for a long time, the thick portion 43 prevents leakage of urine or the like from the paper diaper 1. Further, by retaining urine or the like in the thick portion 43, the urine or the like diffuses on the absorber 4 and is absorbed at a location having an absorbing power. Therefore, the absorber 4 can sufficiently exhibit the absorbing power.

Further, since the gathered non-woven fabrics 5, 5 are provided on the top sheet 2 so that the three-dimensional gathers G, G stand upright from above the second absorbent body 42,
When the disposable diaper 1 is attached, the end portion 5 is located above the three-dimensional gather G.
The b is pressed against the wearer so as to be in close contact with the wearer so that the inner side and both sides of the diaper 1 are partitioned.
Therefore, urine and the like are prevented from leaking to the outside from both sides of the disposable diaper 1. Moreover, by this three-dimensional gather G, G,
Since a space for retaining urine or the like until it is absorbed is formed on the topsheet 2, urine or the like is retained on the topsheet 2 even if the absorption capacity of a part of the absorber 4 is reduced. , Is diffused on the absorber 4 and is absorbed at a portion having an absorbing power. Therefore, the absorbing power of the absorber 4 can be further exerted.

FIG. 2 shows a modified example of the absorber 7 having a thick portion. FIG. 2 (a) is a top view of the absorbent body 7 (showing the top sheet side when it is interposed in the main body of the diaper),
(B) is a sectional view taken along the line BB 'of (a). In this modified example, the absorbent body 7 includes a first absorbent body 71 provided from the abdomen side to the back side of the main body of the diaper, and a second absorbent body 7 provided on the top sheet side of the first absorbent body 71.
It is mainly composed of 2.

The second absorbent body 72 is formed in such a size that it is inserted from the abdominal side to the dorsal side abdominal side of the main body of the diaper, and the central portion of the position corresponding to the abdominal side is cut out. It has a curved shape. Therefore, in the absorbent body 7, as shown in FIG. 2B, a concave portion 7a is formed at a position where the second absorbent body 72 is pulled out in the ventral side portion, and the first absorbent body 71 and the first absorbent body 71 are formed in the peripheral portion of the concave portion 7a. A thick portion 73 is formed by the second absorber 72.

When the absorbent body 7 of this modified example is interposed between the top sheet and the back sheet to form a diaper, a thick wall portion 73 is formed at the peripheral portion of the abdominal side portion of the absorbent body 7. When used, urine or the like can be retained in the recess 7a. Therefore, leakage of urine and the like is prevented, and even if the absorbency of a part of the absorbent body 7 is reduced, the urine and the like can be absorbed by the absorbent part, and the absorbent body 7 has a sufficient absorbency. Can be demonstrated.

Here, as a specific example of the sheet-shaped absorbent body forming the first absorbent bodies 41 and 71, for example, an air-laid absorbent body (Leonia: Novathin (registered trademark)),
SAP Nonwoven Composite (JATI (Japan Absorbent Technology Research Institute): Meg
athin (registered trademark)) and the like are manufactured.

The disposable diaper 1 according to the above embodiment is used.
However, in the case of being used for men, as described above, since the thick part is formed at the end and both sides of the abdominal part 1a and the entire genital area is covered, the position of the wearer changes. However, leakage of urine and the like is prevented, which is preferable. On the other hand, like the disposable diaper 10 shown in FIG. 3, in the back side portion 1b as well as the abdominal side portion 1a, the longitudinal end portions of the absorbent body 4 and the widthwise both side portions continuous from these end portions are provided. It is more preferable to provide the second absorber 44 so as to substantially follow the above because it also has an effect of preventing leakage of feces and the like. Such a disposable diaper 10 may be used for both men and women. In the case of the unisex type, a thick portion may be provided on the entire peripheral edge of the absorbent body so as to extend from the abdominal side of the absorbent body to the back side via the crotch portion 1c. Furthermore, in the case of women's use, a thick portion may be provided only on the back side portion 1b of the absorber 4. In the case of the absorbent body 7 as in the modified example, the thick portion 73 may be formed into a desired shape by appropriately cutting out the second absorbent body 72 and changing the position and shape of forming the recess 7a.

The present invention also provides, for example, a first absorber and a second absorber.
The absorber may be integrally formed, and the second absorber (thick part) may be U-shaped. The ratio between the pulp and SAP of the absorber is not limited to the above, and can be changed as appropriate. Further, the first absorbent body and the second absorbent body may be formed of the same superabsorbent polymer. This is because even if the polymer forming the second absorber has diffusibility, leakage of urine or the like can be prevented by forming at least the thick portion. In addition, the present invention may be applied to a pants-type disposable diaper.

[0027]

According to the invention as set forth in claim 1, even if the absorbing power of urine is reduced in a part of the absorbent body, the thick portion keeps the urine and the like on the absorbent body, and the absorbent portion is absorbed. Can absorb urine and the like. Therefore, it is possible to prevent leakage of urine and the like from the disposable diaper, and it is possible to allow the absorbent body to exert sufficient absorbing power. According to the invention of claim 2, it is needless to say that the same effect as that of the invention of claim 1 can be obtained, and in particular, the thick portion is formed by the first absorber and the second absorber. Therefore, it is easier to form the thick-walled portion and change the thickness as compared with the case where the central portion and the thick-walled portion are integrated.

According to the third aspect of the invention, the inside and the side of the diaper are partitioned by the three-dimensional gathers.
In addition, the three-dimensional gathers create a space for retaining urine and the like until the urine and the like are absorbed by the absorber. Therefore, it is possible to further prevent the urine and the like from leaking to the side of the thick portion, and the urine and the like retained on the absorbent body is diffused on the absorbent body and absorbed at a location having absorbency. It is possible to further exert the absorbing power by the absorber.

[Brief description of drawings]

FIG. 1 shows a disposable diaper to which the present invention is applied, where (a) is a development view of the top sheet side, and (b) is A of the disposable diaper shown in (a).
FIG. 6 is a sectional view taken along the line A ′.

2A and 2B show modified examples of the absorbent body in the paper diaper of the present invention, FIG. 2A is a top view, and FIG. 2B is a sectional view taken along line BB ′ of FIG.

FIG. 3 is a development view of the top sheet side showing another example of the disposable diaper to which the present invention is applied.

FIG. 4 is a development view of a top sheet side of a conventional disposable diaper.

[Explanation of symbols]

1, 10 disposable diapers (disposable disposable diapers) 2 Top sheet (liquid permeable sheet) 3 Back sheet (liquid impermeable sheet) 4,7 absorber 41,71 1st absorber (absorber) 42,44,72 2nd absorber (absorber) 43,73 thick part 5 gather non-woven fabric G three-dimensional gather

Claims (3)

[Claims] 1. A liquid-permeable sheet, a liquid-impermeable sheet,
In a disposable paper diaper having an absorbent body interposed between the liquid permeable sheet and the liquid impermeable sheet from the abdominal part to the dorsal part, in the abdominal part or the dorsal part of the absorbent body Of these, at least one of the liquid-permeable sheet side, at least one of the longitudinal end of at least one of the absorber and substantially at least a part of both sides in the width direction continuous from this end, the center A disposable diaper characterized by having a thicker part thicker than the part. 2. The disposable paper diaper according to claim 1, wherein the absorbent body is a first absorbent body provided from a ventral side portion to a back side portion of the disposable paper diaper, and a ventral side portion of the first absorbent body. The first side is provided on at least one surface of the back side on the liquid permeable sheet side.
At least one longitudinal end of the absorber and a second absorber provided substantially along at least a part of both widthwise continuous portions from this end, and the thick portion, A disposable diaper formed by the first absorbent body and the second absorbent body. 3. The disposable paper diaper according to claim 1, wherein the liquid permeable sheet is provided with a solid gather that stands up with the thick portion as a standing point.