JP2004350809A - Pants-shaped disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it hard to cause the occurrence of a lateral leak by keeping the adhesion state of an absorbent main body even if the waist part of a diaper main body slips down largely. <P>SOLUTION: In the pants-shaped disposable diaper, an absorbent core 13 is bonded to the almost entire surfade of the absorbent main body 3, and this absorbent main body 3 to that of the crotch part R of a diaper main body 2. Crotch elastic members 17 are provided to the lower part of the absorbent core 13 of the absorbent main body 3 at a predetermined interval over the whole width of the absorbent core 13 so as to be stretched in the forward and rearward direction X of the diaper. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pants-type disposable diaper.
[0002]
[Prior art]
Conventionally, a diaper body (pants) having leg holes formed on both sides of a crotch part between a front abdomen and a back part, and an absorbent body (pad) attached to the crotch part, And a back portion, a waist elastic member is extended in the diaper width direction in an extended state, and the leg hole portion is provided with a leg hole elastic member in an extended state along the leg hole. There is a disposable diaper (for example, see Patent Document 1).
[0003]
Patent Literature 1 discloses that a crotch elastic member (a second elastic elastic member) is attached to a back surface of an absorbent main body in a state of being extended in a diaper front-rear direction, and a portion between front and rear ends of the absorbent main body is provided. By lifting the diaper body upward from the inner surface of the diaper body by the contraction force of the elastic member for the crotch, the absorbent body is brought into close contact with the wearer's skin, and even if the diaper body is displaced and lowered, the adhered state of the absorbent body can be maintained That is.
[0004]
[Patent Document 1]
JP-A-2003-62009
[Problems to be solved by the invention]
However, in Patent Literature 1, when the waist portion of the diaper main body is greatly shifted down, the absorbent main body is also shifted together with the diaper main body, so that the close contact state of the absorbent main body cannot be maintained, There was a problem that lateral leakage occurred.
[0006]
The present invention has been made in order to solve the above-mentioned problem, and even when the waist portion of the diaper main body is greatly shifted down, the tightness of the absorbent main body is maintained, and a pants type in which lateral leakage hardly occurs. It is an object to provide a disposable diaper.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a diaper main body having leg holes formed on both sides of a crotch between a front abdomen and a back, and an absorbent main body attached to the crotch. An elastic member for waist and an elastic member for body fitting are attached to the front abdomen and the back portion in an extended state in the width direction of the diaper, and the leg holes are provided along the leg holes. In a pants-type disposable diaper in which the member is attached in an extended state,
The absorbent core is almost completely joined to the absorbent body, and the absorbent body is joined almost completely to the crotch portion, and the absorbent core is provided under the absorbent core of the absorbent body. An object of the present invention is to provide a pants-type disposable diaper characterized in that a crotch elastic member is attached to the diaper in a longitudinal direction at predetermined intervals over the entire width.
[0008]
According to a second aspect of the present invention, the cut end portion cut to reduce the contraction force of the elastic member for the leg hole in the crotch portion faces the both side edges of the absorbent main body. Is preferred.
[0009]
As in claim 3, the absorbent body extends in the front-rear direction of the diaper so as to overlap the body-fitting elastic member of the diaper body, and the crotch elastic member is at least a part of the body-fitting elastic member. It is preferable to adopt a configuration that intersects with.
[0010]
According to a fourth aspect of the present invention, it is preferable that rising flaps are provided on both sides of the absorbent main body.
[0011]
Function and Effect of the Invention
According to the present invention, the absorbent core is almost completely joined to the absorbent body, the absorbent body is joined almost entirely to the crotch of the diaper body, and further, the lower part of the absorbent core of the absorbent body. With the crotch elastic member attached, the cut end of the leg hole elastic member at the crotch portion is made to face the side edge of the absorbent main body. Since the entire body and the entire crotch portion of the diaper body are lifted upward, the absorbent body is in close contact with the wearer's crotch portion, so that side leakage hardly occurs.
[0012]
According to the second aspect, the cut end of the leg hole elastic member faces the both side edges of the absorbent main body, so that even when the waist portion of the diaper main body is greatly shifted down, the leg is formed. Due to the contraction force of the hole elastic member, the state of close contact between the crotch portion of the absorbent main body and the crotch portion of the diaper main body with respect to the wearer is reduced, so that lateral leakage hardly occurs.
[0013]
According to the third aspect, since the crotch elastic member of the absorbent main body crosses at least a part of the body fitting elastic member of the diaper main body, the contraction of the crotch elastic member is supported by the body fitting elastic member. Because of the increased force, the absorbent body will be more closely adhered to the wearer's crotch.
[0014]
According to the fourth aspect, the rising flap of the absorbent main body can more effectively prevent the occurrence of lateral leakage.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
As shown in FIGS. 1 and 2, the pants-type disposable diaper 1 </ b> A basically includes a diaper main body 2 and an absorbent main body 3.
[0017]
As shown in FIGS. 3 and 5A, the diaper main body 2 has an interior (skin side) sheet in which leg holes S are formed on both sides of a crotch R between a front abdomen P and a back back Q. 4 and an outer (outer side) sheet 5, and at the waist of the front abdomen P and the back Q between the interior sheet 4 and the exterior sheet 5, a plurality of diapers are arranged at a narrow interval in the front-rear direction X. A waist elastic member 6 is attached in an extended state in the diaper width direction W, and a plurality of body-fitting elastic members 7 are provided on the body portion at a wide interval in the diaper front-rear direction X in the diaper width direction W. It is attached in an extended state.
[0018]
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.
[0019]
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.
[0020]
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.
[0021]
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.
[0022]
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
[0023]
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.
[0024]
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 .
[0025]
The absorbent body 3 is formed by sandwiching an hourglass-shaped absorbent core 13 wrapped by a covering sheet 12 between a top sheet 10 and a back sheet 11, as shown in FIGS. Thus, the diaper extends in the front-rear direction X.
[0026]
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.
[0027]
A plurality of crotch elastic members 17 are provided between the covering sheet 12 of the absorbent main body 3 and the absorbent core 11 at predetermined intervals over the entire width in the diaper width direction W with respect to the absorbent core 11. Are attached in a stretched state in the front-rear direction X.
[0028]
The crotch elastic member 17 may be provided between the covering sheet 12 and the back sheet 11 as shown in FIG. 4B, and is bonded to the interior sheet 4 as shown in FIG. 4D, the lower crotch sheet 18A and the lower crotch sheet 18A, which are bonded to the interior sheet 4, are attached to the back sheet 11 as shown in FIG. It may be provided between the upper crotch holding sheet 18B.
[0029]
The absorbent main body 3 is set to have a length in the front-rear direction X that does not hang on the body-fitting elastic member 7 of the diaper main body 2.
[0030]
The absorbent core 13 of the absorbent main body 3 is almost entirely adhered to the top sheet 10 and the back sheet 11 with a hot melt adhesive or the like, and the back sheet 11 is attached to the crotch of the diaper main body 2. Almost all the surface is bonded to the R interior sheet 4 with a hot melt adhesive or the like.
[0031]
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.
[0032]
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 17 is not hung.
[0033]
The absorbent core 13 is formed by mixing a hydrophilic polymer aggregate layer of crushed pulp fiber or cellulose fiber with a granular polymer water-absorbent material, and coating the sheet with a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet. 12 and formed into a predetermined shape (rectangular, hourglass, gourd, etc.). A sheet-like body (for example, an air-laid absorbent) in which the above-mentioned fiber or polymer water-absorbing body is formed into a sheet may be used after being formed into a predetermined 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.
[0034]
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.
[0035]
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 .
[0036]
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 .
[0037]
As the cover sheet 12, a paper sheet such as a tissue paper or a liquid-permeable nonwoven sheet is used.
[0038]
The crotch press sheet 18 (A, B) 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 .
[0039]
Each of the elastic members 6 to 8, 16, and 17 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 an agent, heat bonding, and ultrasonic bonding. Preferably, it is a rubber-based hot melt adhesive.
[0040]
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.
[0041]
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.
[0042]
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.
[0043]
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.
[0044]
The crotch elastic member 17 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.
[0045]
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.
[0046]
In the pants-type disposable diaper 1A configured as described above, the absorbent core 13 is almost entirely adhered to the absorbent main body 3, and the absorbent main body 3 is almost completely adhered to the crotch portion R of the diaper main body 2. Further, after the crotch elastic member 17 is attached to the lower part of the absorbent core 13 of the absorbent main body 3, the cut ends 8 a of the leg hole elastic member 8 at the crotch R are attached to both side edges of the absorbent main body 3. 3a.
[0047]
Therefore, the entire absorbent main body 3 and the entire crotch R of the diaper main body 2 are lifted up by the contraction force of the crotch elastic member 8 over the entire width W1 of the absorbent core 13, so that the absorbent main body 3 is worn. Closely adheres to the crotch of the person, and side leakage hardly occurs.
[0048]
In addition, since the cut end 8a of the leg hole elastic member 8 is made to hang on both side edges 3a of the absorbent main body 3, even when the waist portion of the diaper main body 2 is greatly shifted down, the leg is formed. The contraction force of the hole elastic member 8 maintains the state of contact between the crotch portion of the absorbent main body 3 and the crotch portion of the diaper main body 2 with respect to the wearer, so that side leakage hardly occurs.
[0049]
Furthermore, the rising flap 15 of the absorbent main body 3 can more effectively prevent the occurrence of lateral leakage.
[0050]
FIGS. 6 and 5 (b) show a pants-type disposable diaper 1B according to a modified example. In the pants-type disposable diaper 1A, the absorbent main body 3 does not hang on the body-fitting elastic member 7 of the diaper main body 2. Although set to the length of X, in the pants-type disposable diaper 1B of the modified example, the absorbent main body 3 is extended in the diaper front-rear direction X so as to overlap with the body-fitting elastic member 7 of the diaper main body 2, The difference is that the crotch elastic member 17 crosses at least a part of the body fitting elastic member 7.
[0051]
As described above, when the crotch elastic member 17 of the absorbent main body 3 crosses at least a part of the body fitting elastic member 7 of the diaper body 2, the crotch elastic member 17 is supported by the body fitting elastic member 7. Since the contraction force is increased, the absorbent main body 3 comes into closer contact with the wearer's crotch.
[Brief description of the drawings]
FIG. 1 is a front view of a pants-type disposable diaper.
FIG. 2 is a plan view of an absorbent main body.
FIG. 3 is a plan view of a pants-type disposable diaper in an unfolded state.
FIGS. 4A to 4D are enlarged cross-sectional views taken along the line AA in FIG. 3 showing examples of attaching a crotch elastic member.
5A is a sectional view taken along line BB of FIG. 3, and FIG. 5B is a sectional view taken along line CC of FIG. 6B.
FIG. 6 is a pants-type disposable diaper of a modified example, where (a) is a front view and (b) is a plan view in an unfolded state.
[Explanation of symbols]
1A, 1B Pants-type disposable diaper 2 Diaper body 3 Absorbent body 3a Side edges 6 Elastic member for waist 7 Elastic member for body fitting 8 Elastic member for leg holes 8a Cutting end 13 Absorbent core 15 Rise flap 17 Elasticity for crotch Member P Front abdomen Q Rear back R Crotch S Leg hole X Diaper front-rear direction W1 Width

Claims (4)

A diaper body having leg holes formed on both sides of the crotch between the front abdomen and the back, and an absorbent body attached to the crotch, the front abdomen and the back include a waist A pants-type disposable in which an elastic member for body fitting and an elastic member for body fitting are extended in the diaper width direction and the elastic member for leg holes is extended in the leg hole along the leg hole. In diapers,
The absorbent core is almost completely joined to the absorbent body, and the absorbent body is joined almost completely to the crotch portion, and the absorbent core is provided under the absorbent core of the absorbent body. A pants-type disposable diaper characterized in that a crotch elastic member is attached to the diaper in a longitudinally extending state at predetermined intervals over the entire width. 2. The pants-type disposable diaper according to claim 1, wherein the cut end cut to reduce the contraction force of the elastic member for the leg hole in the crotch portion is applied to both side edges of the absorbent main body. The said absorbent main body is extended in the diaper front-back direction so that it may overlap with the body fitting elastic member of the said diaper main body, The said crotch elastic member crosses at least one part of the body fitting elastic member, Claims. The pants-type disposable diaper according to 1 or 2. The pants-type disposable diaper according to any one of claims 1 to 3, wherein rising flaps are provided on both sides of the absorbent body.

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