JP2004350864A - Disposable wearing article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable wearing article capable of effectively preventing the lateral leak and dorsabdominal leak of urine or the like by enhancing the fitness of an absorbent main body. <P>SOLUTION: This disposable wearing article is equipped with a diaper main body 2 and the absorbent main body 3 bonded to the inner surface of the crotch part R of the diaper main body 2. A lower layer absorbent core 13A, which is divided into a plurality of parts in the width direction W of a diaper at least at the crotch part of the diaper main body 2, and a flexible upper layer absorbent core 13B, which is arranged above the lower layer absorbent core 13A, are provided to the absorbent main body 3. The elastic member 9, which is provided to the diaper so as to be stretched in the forward and rearward direction X of the diaper, is arranged so as to be located at the division gap T of the lower layer absorbent core 13A. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a disposable wearing article that can effectively prevent side leakage and back and ventral leakage.
[0002]
[Prior art]
Conventionally, the absorbent core of the absorbent body joined between the outer sheet and the skin sheet is divided into a plurality of pieces in the width direction of the diaper, and the diapers are positioned in the divided gaps of the divided absorbent core pieces. There is a disposable wearing article in which an elastic member arranged in the front-rear direction is joined between an outer sheet and a skin sheet. (For example, see Patent Document 1).
[0003]
The disposable wearing article can effectively prevent lateral leakage of urine or the like by enhancing the fit property of the absorbent main body.
[0004]
[Patent Document 1]
JP, 2002-143215, A
[Problems to be solved by the invention]
However, there is a demand in a technique such as cited document 1 to effectively prevent dorsoventral leakage caused by urine or the like flowing in the front and rear direction of the diaper in the divided gap between the divided absorbent cores.
[0006]
The present invention has been made in order to meet the above-mentioned demands, and has an object to provide a disposable diaper that can further improve the fit property of an absorbent main body and effectively prevent lateral leakage and back and ventral leakage of urine and the like. Is what you do.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, claim 1 of the present invention includes a diaper main body and an absorbent main body joined to an inner surface of a crotch portion of the diaper main body, and the absorbent main body has at least a crotch portion. A lower absorbent core divided into a plurality of pieces in the diaper width direction, and a flexible upper absorbent core disposed above the lower absorbent core are provided, and the lower absorbent core is located in a division gap of the lower absorbent core. Another object of the present invention is to provide a disposable wearing article characterized in that an elastic member attached to the diaper in the front-back direction in an extended state is arranged.
[0008]
Claim 2 of the present invention includes a diaper main body, and an absorbent main body joined to a crotch portion between an outer sheet and a skin side sheet of the diaper main body. A lower absorbent core whose portion is divided into a plurality of parts in the diaper width direction, and a flexible upper absorbent core disposed above the lower absorbent core are provided, and the lower absorbent core is located in the divided gap of the lower absorbent core. The present invention also provides a disposable wearing article characterized in that an elastic member attached to the diaper in the front-back direction in an extended state is disposed.
[0009]
Like the third aspect, in the second aspect, the upper absorbent core may be configured to be joined to an inner surface of the skin-side sheet.
[0010]
According to a fourth aspect of the present invention, in the first to third aspects, it is preferable that the rising flaps are provided on both sides of the absorbent main body.
[0011]
Function and Effect of the Invention
According to the first aspect of the present invention, a divided lower absorbent core and a flexible upper absorbent core are provided on an absorbent main body joined to a crotch portion of a diaper main body, and a divided gap between the lower absorbent cores is provided. By locating the elastic member, the flexible upper absorbent core can be easily fitted to the wearer's crotch portion through the lower absorbent core having a split gap, and the flexible upper absorbent core can be flexible through the lower absorbent core. The upper absorbent core is fitted to the crotch portion of the wearer by the contraction force of the elastic member, so that the fitting property is enhanced and lateral leakage of urine and the like can be effectively prevented.
[0012]
In addition, since the flexible upper absorbent core covers the divided gap of the lower absorbent core and suppresses urine and the like from flowing in the dorsoventral direction, it is possible to effectively prevent dorsoventral leakage.
[0013]
According to the second aspect of the present invention, the absorbent body joined to the crotch between the outer sheet and the skin sheet of the diaper body has a divided lower absorbent core and a flexible upper absorbent core. Is provided, and the elastic member is disposed at the divided gap of the lower absorbent core, whereby the same effect as in claim 1 can be obtained.
[0014]
According to claim 3, by joining the upper absorbent core to the inner surface of the skin-side sheet, the same effect as in claim 2 can be obtained, and if the upper absorbent core is detachably joined, Only the upper absorbent core can be replaced as needed.
[0015]
According to the fourth aspect, if the rising flaps are provided on both sides of the absorbent main body, lateral leakage of urine or the like can be more effectively prevented.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
1 to 3 show an embodiment of a pants-type disposable diaper 1 which is a disposable wearing article. The pants-type disposable diaper 1 is basically composed of a diaper main body 2 and an absorbent main body 3.
[0018]
The diaper main body 2 includes an interior (skin side) sheet 4 and an exterior (outside) sheet 5 having leg holes S formed on both sides of a crotch portion R between a front abdomen P and a back portion Q, A plurality of waist elastic members 6 extend in the diaper width direction W at narrow intervals in the diaper front-rear direction X at the waist portion between the front abdomen P and the back back Q between the interior sheet 4 and the exterior sheet 5. In addition, a plurality of body-fitting elastic members 7 are attached to the body portion in a stretched state in the diaper width direction W at wide intervals in the diaper front-rear direction X.
[0019]
Further, a plurality of leg hole elastic members 8 are attached to the leg holes S between the interior sheet 4 and the exterior sheet 5 in an extended state along the leg holes.
[0020]
The interior sheet 4 and the exterior sheet 5 are bonded with a hot melt adhesive or the like with the elastic members 6 to 8 interposed therebetween.
[0021]
When the diaper main body 2 is manufactured in a lateral flow state in the diaper width direction W, the leg hole elastic member 8 (A) on the front abdomen P side is curved along the front leg hole S in a continuous state. The leg elastic member 8 (B) is attached along the crotch portion R, is straightly attached at the crotch portion R, is attached along the rear leg hole portion S in a curved shape, and the leg hole elastic member 8 (B) on the rear back portion Q side. In a continuous state, it is provided in a curved shape along the front leg hole S, is straightly provided in the crotch portion R, and is provided in a curved shape along the rear leg hole S. Become. The leg hole elastic members 8 (A, B) may be provided so as to intersect at the crotch portion R.
[0022]
After the attachment, the elastic force is reduced by cutting a predetermined width W1 in the diaper width direction at the center of the crotch portion R.
[0023]
The adhesive body between the interior sheet 4 and the exterior sheet 5 is assembled as the diaper body 2 by overlapping the front abdomen P and the back back Q with the crotch R as a boundary and thermally joining the side portions 1a. Become like
[0024]
The interior sheet 4 is made of a water-repellent nonwoven material (spunbonded nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric, etc.). Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 25 g / m ² . Also, only the inner surface is made hydrophilic (a surfactant is applied, or a layer of hydrophilic fibers (rayon, cotton, etc.) is made). In this case, the feel when contacting the skin is improved, and a sweat absorbing effect can be expected.
[0025]
The exterior sheet 5 is made of a water-repellent nonwoven material (spunbonded nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric, etc.). Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 25 g / m ² .
[0026]
Between the top sheet 10 and the back sheet 11 of the absorbent main body 3, the lower absorbent core 13 A and the upper absorbent core 13 B wrapped by the covering sheets 12 A and 12 B and extending in the diaper front-back direction X, respectively. However, it is almost entirely bonded with a hot melt adhesive or the like.
[0027]
Here, "to almost completely adhere" means not only a so-called solid coating, but also a coater coating, a bead coating, a spiral spray coating, a curtain spray coating, etc. It also means that the paint is applied almost all over the space with less gaps.
[0028]
The lower absorbent core 13A is divided into a plurality (four in this example) in the diaper width direction W with a fixed dividing gap T therebetween. The lower absorbent core 13A does not necessarily need to be completely divided in the diaper width direction W as shown in FIG. 3D, and as shown in FIG. May be connected, and only the inseam portion may be divided in the diaper width direction W. In this case, the connecting portion between the front and rear ends is preferably 100 mm or less, and if it exceeds 100 mm, it becomes difficult to bend into a curved shape due to the contraction force of the elastic member 9 for crotch described below.
[0029]
The crotch elastic members 9 are disposed in the divided gap T of the lower absorbent core 13A in a state of being extended in the diaper front-rear direction X, and the crotch elastic members 9 are adhered to the upper surface of the back sheet 11. .
[0030]
The crotch elastic member 9 may be bonded to the inside of the cover sheet 12A of the lower absorbent core 13A, or may be bonded to a crotch press sheet (not shown) bonded to the lower surface of the back sheet 11. Alternatively, it may be bonded between a lower crotch press sheet adhered to the interior sheet 4 and an upper crotch press sheet adhered to the back sheet 11.
[0031]
The overall width of the lower absorbent core 13A and the upper absorbent core 13B is preferably about 30 to 250 mm. If it is less than 30 mm, the absorption amount is small, and if it exceeds 250 mm, it is difficult to bend into a curved shape due to the contraction force of the elastic member 9 for crotch. Become. However, it is also possible to make the maximum about 500 mm.
[0032]
The division gap T of the lower absorbent core 13A is preferably about 5 to 20 mm. If it is less than 5 mm, it is difficult to adhere the crotch elastic member 9 to the back sheet 11, and if it exceeds 20 mm, it becomes difficult to bend into a curved shape due to the contraction force of the crotch elastic member 9.
[0033]
The upper absorbent core 13B is formed in substantially the same outer shape as the lower absorbent core 13A, but is not divided, and is thinner and more flexible than the lower absorbent core 13A. ing. Note that the upper absorbent core 13B does not necessarily have to have substantially the same outer shape as the lower absorbent core 13A, and may have a shape that at least covers the divided gap T near the excretion opening in the crotch of the wearer.
[0034]
On both sides of the inner surface (upper surface) of the top sheet 10 of the absorbent main body 3, base ends 15a of rising flaps 15 extending in the diaper front-rear direction X are respectively adhered, and are raised upward, and their upper ends are raised. The wings are folded inward, and the elastic members 16 for flaps are attached to the diapers in the front-rear direction X in the folded state so that the rising flaps 15 rise. The inner surfaces of the front and rear end portions of the rising flap 15 are bonded to the top sheet 10 in a falling state.
[0035]
The absorbent body 3 is set to have a length in the front-rear direction X of the diaper such that at least the absorbent cores 13A and 13B do not engage the body-fitting elastic member 7 of the diaper body 2. However, there is no problem even if the length of the elastic member for body fitting 7 is long.
[0036]
The lower absorbent core 13A and the upper absorbent core 13B of the absorbent main body 3 are almost entirely adhered to the top sheet 10 and the back sheet 11 with a hot melt adhesive or the like. The entire surface of the diaper main body 2 is bonded to the interior sheet 4 of the crotch portion R with a hot melt adhesive or the like.
[0037]
As described above, the leg hole elastic members 8 (A, B) of the diaper main body 2 are cut by a predetermined width W1 in the diaper width direction. It is faced so as to hang on both side edges 3a. The crotch elastic member 9 is not hung.
[0038]
Each of the absorbent cores 13A and 13B is made of a mixture of a crushed hydrophilic fiber aggregate such as pulp fiber or cellulose fiber and a particulate polymer water-absorbent material, such as a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet. Wrapped with the covering sheets 12A and 12B, and molded into a predetermined shape (rectangular shape). In order to maintain the shape even when the wearer walks or rolls over, the shape holding means (application of a hot melt adhesive, mixing of synthetic fibers) is applied to the hydrophilic fiber aggregate layer or the sheet. No problem. The upper absorbent core 13B is formed by molding a sheet (for example, an air-laid absorbent) obtained by molding the above fiber or polymer absorbent into a sheet into a predetermined shape (hourglass type, gourd type, etc.). No problem.
[0039]
The upper absorbent core 13B is thinner than the lower absorbent core 13A and has flexibility. For example, when the total thickness of each of the absorbent cores 13A and 13B is in the range of 2 to 10 mm, the upper absorbent core 13B has a thickness of 2 to 10 mm. It is preferable that the thickness of the core 13B is 1 to 3 mm, and the thickness of the lower absorbent core 13A is 4 to 10 mm.
[0040]
Further, in the upper absorbent core 13B, it is preferable that the basis weight of the hydrophilic fiber assembly layer in a portion overlapping with the divided gap T of the lower absorbent core 13A is lower than the basis weight of other portions. As a method of partially lowering the basis weight, a method of providing irregularities on the conveyor or pattern drum surface for accumulating fibers and a method of making the lowering portions convex or the height of the scraping roll rotating at the time of accumulating the fibers. Alternatively, there is a method of partially lowering the weight per unit area by making a difference between a part that accumulates a lot and a part that accumulates a little.
[0041]
The topsheet 10 is preferably made of a liquid-permeable nonwoven material. For example, a nonwoven material using hydrophilic fibers (cellulose, rayon, cotton, etc.) or a nonwoven material made hydrophobic by treating the surface of hydrophobic fibers (polypropylene, polyester, polyamide, nylon, etc.) with a surfactant Is used. Preferably, it is a liquid-permeable nonwoven material (point-bonded nonwoven fabric, air-through nonwoven fabric) in which the back surface of a hydrophobic fiber having a basis weight of 10 to 25 g / m ² is treated with a surfactant to be liquid-permeable.
[0042]
The back sheet 11 may be made of a water-repellent nonwoven material (spunbonded nonwoven fabric, melt-blown nonwoven fabric, SMS nonwoven fabric, etc.), a plastic film (air-permeable or non-air-permeable). Or a composite material thereof. Preferably, it is a breathable polyethylene film having a basis weight of 15 to 40 g / m ² .
[0043]
The rising flap 15 is made of a water-repellent nonwoven material (spunbonded nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric, etc.). Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 25 g / m ² .
[0044]
As the covering sheets 12A and 12B, a paper sheet such as a tissue paper or a liquid-permeable nonwoven sheet is used.
[0045]
For the crotch press sheet (not shown), a water-repellent nonwoven fabric material (spunbonded nonwoven fabric, meltblown nonwoven fabric, SMS nonwoven fabric, etc.) is used. Preferably, it is a water-repellent nonwoven material having a basis weight of 10 to 25 g / m ² .
[0046]
Each of the elastic members 6 to 9 and 16 is made of an elastic elastic material (polyurethane thread, polyurethane film, natural rubber, or the like) which is usually used for disposable diapers. It is attached by a suitable attaching means such as heat bonding and ultrasonic bonding. Preferably, it is a rubber-based hot melt adhesive.
[0047]
It is preferable that the waist elastic member 6 is provided with a polyurethane yarn having a fineness of 700 to 2000 decitex stretched to a magnification of 2.0 to 4.0 times.
[0048]
The body fitting elastic member 7 is preferably provided with a polyurethane yarn having a fineness of 300 to 700 decitex stretched to a magnification of 1.1 to 2.0 times.
[0049]
The leg hole elastic member 8 is preferably provided with a polyurethane yarn having a fineness of 700 to 2000 decitex stretched to a magnification of 1.1 to 3.0 times.
[0050]
The crotch elastic member 9 is preferably provided with a polyurethane yarn having a fineness of 300 to 2000 decitex stretched to a magnification of 1.1 to 4.0 times.
[0051]
The flap elastic member 16 is preferably provided with a polyurethane yarn having a fineness of 300 to 2,000 decitex, which is stretched to a magnification of 1.1 to 4.0 times.
[0052]
For joining the above-mentioned sheet materials, a method such as hot-melt adhesive, thermal joining, ultrasonic sealing or the like is appropriately used. Hot melt adhesives are appropriately selected from rubber, polyolefin, and vinyl acetate hot melt adhesives, and are directly coated with a coater, indirectly spirally coated, meltblown (curtain spray) coated, and beaded. And so on. In addition, about the said side part 1a, thermal joining is preferable.
[0053]
In the pants-type disposable diaper 1 configured as described above, the absorbent main body 3 adhered to the crotch portion R of the diaper main body 2 is provided with the divided lower absorbent core 13A and the flexible upper absorbent core 13B, By arranging the crotch elastic member 9 at the divisional gap T of the lower absorbent core 13A, the flexible upper absorbent core 13B is connected to the wearer's crotch portion via the lower absorbent core 13A having the divided gap T. And the flexible upper absorbent core 13B is bent into a curved shape by the contraction force of the crotch member 9 via the lower absorbent core 13A, and is fitted to the wearer's crotch. As a result, lateral leakage of urine and the like can be effectively prevented.
[0054]
Further, since the flexible upper absorbent core 13B covers the divided gap T of the lower absorbent core 13A and suppresses the urine and the like from flowing in the dorsoventral direction, the dorsoventral leakage can be effectively prevented. become.
[0055]
Furthermore, since the rising flaps 15 are provided on both sides of the absorbent main body 3, lateral leakage of urine and the like can be more effectively prevented.
[0056]
Furthermore, since the cut ends 8a of the elastic members 8 for leg holes in the crotch portion R face the both side edges 3a of the absorbent main body 3, the waist portion of the diaper main body 2 is greatly shifted down. Even in such a case, the contraction force of the leg hole elastic member 8 keeps the wearer's crotch portion of the absorbent main body 3 and the diaper main body 2 in close contact with each other, so that lateral leakage hardly occurs.
[0057]
In the above embodiment, the absorbent main body 3 is almost entirely adhered to the inner surface (upper surface) of the interior sheet 4 of the crotch portion R of the diaper main body 2 with a hot melt adhesive or the like. As shown in FIG. 4 (a), the absorbent main body 3 may be almost entirely bonded between the inner sheet 4 and the outer sheet 5 at the crotch portion R of the diaper main body 2 with a hot melt adhesive or the like. good.
[0058]
In this case, the base end 15a of the rising flap 15 is adhered to both sides of the inner surface (upper surface) of the interior sheet 4 so as to be raised upward.
[0059]
As shown in FIG. 4B, the lower absorbent core 13A of the absorbent main body 3 is almost entirely hot-filled between the interior sheet 4 and the exterior sheet 5 at the crotch R of the diaper main body 2. The upper absorbent core 13B may be almost completely adhered to the inner surface (upper surface) of the interior sheet 4 with a hot melt adhesive or the like while being adhered with a melt adhesive or the like. If the upper absorbent core 13B is detachably locked with a hook-and-loop fastener (mechanical fastener) or a peelable adhesive, only the upper absorbent core 13B can be replaced as needed.
[0060]
The above embodiment is a pants type in which the side portions 2a of the diaper main body 2 are thermally bonded, but a diaper type in which the front abdomen P and the back back Q are detachably locked using a frontal tape and a fastening tape. Needless to say, it can also be applied to
[Brief description of the drawings]
FIG. 1 is a perspective view of a pants-type disposable diaper.
FIG. 2 is a development view of a pants-type disposable diaper.
3A is a sectional view taken along line AA of FIG. 2, FIG. 3B is a sectional view taken along line BB of FIG. 2, and FIGS. 3C and 3D are perspective views of the lower absorbent core, respectively. .
FIGS. 4A and 4B are cross-sectional views each corresponding to a line AA in FIG. 2 of a modified example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Diaper main body 3 Absorbent main body 4 Interior (skin side) sheet 5 Exterior (outside side) sheet 9 Elastic member for crotch 13A Lower absorbent core 13B Upper absorbent core 15 Rise flap T Divided gap W Diaper Width direction X Diaper front-back direction

Claims (4)

A diaper main body, comprising an absorbent main body joined to the inner surface of the crotch portion of the diaper main body, wherein the absorbent main body has at least a crotch portion divided into a plurality in the diaper width direction; A flexible upper absorbent core disposed above the lower absorbent core is provided, and an elastic member is provided in the diaper front and rear direction in a state of being extended in the front and rear direction of the diaper so as to be located in the divided gap of the lower absorbent core. Disposable wearing article characterized by being done. A diaper main body, comprising an absorbent main body joined to a crotch portion between an outer sheet and a skin side sheet of the diaper main body, wherein the absorbent main body has a plurality of at least crotch portions in the diaper width direction. A divided lower absorbent core and a flexible upper absorbent core disposed above the lower absorbent core are provided, and are positioned in the divided gaps of the lower absorbent core to extend in the diaper longitudinal direction. A disposable wearing article, wherein an elastic member attached in a state is disposed. The disposable wearing article according to claim 2, wherein the upper absorbent core is bonded to an inner surface of the skin-side sheet. The disposable wearing article according to any one of claims 1 to 3, wherein rising flaps located on both sides of the absorbent body are provided.

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