JP4209719B2 - Disposable wearing items - Google Patents

Disposable wearing items Download PDF

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Publication number
JP4209719B2
JP4209719B2 JP2003151399A JP2003151399A JP4209719B2 JP 4209719 B2 JP4209719 B2 JP 4209719B2 JP 2003151399 A JP2003151399 A JP 2003151399A JP 2003151399 A JP2003151399 A JP 2003151399A JP 4209719 B2 JP4209719 B2 JP 4209719B2
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Japan
Prior art keywords
main body
absorbent core
diaper
lower
absorbent
Prior art date
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Active
Application number
JP2003151399A
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Japanese (ja)
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JP2004350864A (en
Inventor
勝 藤岡
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株式会社リブドゥコーポレーション
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Publication of JP2004350864A publication Critical patent/JP2004350864A/en
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable wearing article that can effectively prevent side leakage and dorsal belly leakage.
[0002]
[Prior art]
Conventionally, the absorbent core of the absorbent main body joined between the outer surface side sheet and the skin surface side sheet is divided into a plurality of diaper width directions and positioned in the divided gaps of the divided absorbent core pieces. There is a disposable wearing article that joins an elastic member arranged in the front-rear direction between an outer surface side sheet and a skin surface side sheet. (For example, refer to Patent Document 1).
[0003]
The disposable wearing article can effectively prevent side leakage such as urine by improving the fit of the absorbent main body.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-143215
[Problems to be solved by the invention]
However, in the technique such as the cited document 1, there is a demand for effectively preventing dorsoventral leakage due to urine or the like flowing in the front-rear direction of the diaper through the divided gap of the divided absorbent core.
[0006]
The present invention has been made to meet the above-mentioned demands, and has an object to provide a disposable diaper that can further improve the fit of the absorbent main body and effectively prevent lateral leakage of the urine and the back and back of the stomach. To do.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, claim 1 of the present invention includes a diaper main body and an absorbent main body joined to the inner surface of the crotch portion of the diaper main body, and the absorbent main body has at least a crotch portion. A lower layer absorbent core divided into a plurality of diaper width directions and a flexible upper layer absorbent core disposed above the lower layer absorbent core are provided, and are positioned in the division gap of the lower layer absorbent core. The present invention provides a disposable wearing article characterized in that an elastic member attached in a stretched state in the front-rear direction of the diaper is disposed.
[0008]
Claim 2 of the present invention comprises a diaper main body and an absorbent main body joined to a crotch portion between an outer surface side sheet and a skin surface side sheet of the diaper main body, and the absorbent main body includes at least an inseam A lower absorbent core whose part 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 is located in the division gap of the lower absorbent core Accordingly, a disposable wearing article is provided in which an elastic member attached in a stretched state in the front-rear direction of the diaper is disposed.
[0009]
As in claim 3, in claim 2, the upper absorbent core can be configured to be joined to the inner surface of the skin surface side sheet.
[0010]
As in claim 4, in claims 1 to 3, it is preferable that rising flaps located on both sides of the absorbent main body are provided.
[0011]
Operation and effect of the invention
According to claim 1 of the present invention, the absorbent main body joined to the crotch portion of the diaper main body is provided with the divided lower layer absorbent core and the flexible upper layer absorbent core, and the gap between the lower absorbent cores is divided. By positioning the elastic member in a position, the flexible upper layer absorbent core can be easily fitted to the wearer's crotch portion via the lower layer absorbent core having a split gap, and the flexible member can be flexible via the lower layer absorbent core. The upper absorbent core fits into the crotch portion of the wearer due to the contraction force of the elastic member, so that the fit property is enhanced and side leakage such as urine can be effectively prevented.
[0012]
Further, the flexible upper layer absorbent core covers the dividing gap of the lower layer absorbent core and suppresses urine and the like from flowing in the dorsoventral direction, so that dorsoventral leakage can be effectively prevented.
[0013]
According to claim 2 of the present invention, the absorbent main body joined to the crotch portion between the outer surface side sheet and the skin surface side sheet of the diaper main body, the divided lower layer absorbent core, the flexible upper layer absorbent core, The same effect as that of the first aspect can be obtained by arranging the elastic member in the gap between the lower absorbent cores.
[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 exchanged as required.
[0015]
According to the fourth aspect, when the rising flaps are provided on both sides of the absorbent main body, it is possible to more effectively prevent the side leakage of urine and the like.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
1-3 is embodiment of the underpants type disposable diaper 1 which is a disposable wearing article. The pants-type disposable diaper 1 basically includes a diaper main body 2 and an absorbent main body 3.
[0018]
The diaper main body 2 includes an interior (skin surface side) sheet 4 and an exterior (outside surface) sheet 5 in which leg hole portions S are formed on both sides of the crotch R between the front abdomen P and the back portion Q, A plurality of waist elastic members 6 extend in the diaper width direction W at a narrow interval in the diaper front-rear direction X at the waist portion between the front abdomen P and the back portion 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]
In addition, a plurality of leg hole elastic members 8 are attached to the leg hole portion S between the interior sheet 4 and the exterior sheet 5 along the leg hole in an extended state.
[0020]
And the interior sheet 4 and the exterior sheet 5 are adhere | attached with the hot-melt-adhesive etc. in the state which pinched | interposed each elastic member 6-8.
[0021]
When the diaper main body 2 is manufactured in a state of transverse flow in the diaper width direction W, the leg hole elastic member 8 (A) on the front abdominal part P side is curved along the front leg hole part S in a continuous state. Attached in a straight shape at the crotch R, attached in a curved shape along the rear leg hole S, and the leg hole elastic member 8 (B) on the back Q side is In a continuous state, it is attached in a curved shape along the front leg hole portion S, is attached straight in the crotch portion R, and is attached in a curved shape along the rear leg hole portion S. Become. The leg hole elastic members 8 (A, B) may be attached so as to intersect at the crotch portion R.
[0022]
And after this attachment, the expansion / contraction force is made small by cutting only the predetermined width W1 in the diaper width direction in the center part of the crotch R.
[0023]
The adhesive body of the interior sheet 4 and the exterior sheet 5 is assembled as the diaper main body 2 by overlapping the front abdomen P and the back part Q with the crotch part R as a boundary and thermally joining the side part 1a. It becomes like this.
[0024]
The interior sheet 4 is made of a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown 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 . Further, only the inner surface is made hydrophilic [surfactant is applied, or a layer of hydrophilic fibers (rayon, cotton, etc.) is made. In this case, the touch when touching the skin is improved, and a sweat absorption effect can be expected.
[0025]
The exterior sheet 5 is made of a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown 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, a lower absorbent core 13A and an upper absorbent core 13B that are respectively wrapped in covering sheets 12A and 12B and extend in the diaper front-rear direction X. However, it is almost entirely bonded with a hot melt adhesive or the like.
[0027]
Here, “substantially adhere to the entire surface” means not only the so-called solid coating, but also coater coating, bead coating, spiral spray coating, curtain spray coating, etc. It also means to paint with almost no gap on the entire surface.
[0028]
The lower layer absorbent core 13A is divided into a plurality (four in this example) in the diaper width direction W with a certain division gap T therebetween. This lower layer absorbent core 13A does not necessarily need to be completely divided in the diaper width direction W as shown in FIG. 3 (d), and the front and rear end portions in the diaper longitudinal direction X as shown in FIG. 3 (c). May be connected, and only the crotch portion may be divided in the diaper width direction W. In this case, the connecting portion of the front and rear end portions 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 crotch elastic member 9 described below.
[0029]
In the split gap T of the lower absorbent core 13A, the crotch elastic members 9 are arranged in the stretched state in the diaper front-rear direction X, and the crotch elastic members 9 are bonded to the upper surface of the back sheet 11. .
[0030]
The crotch elastic member 9 may be adhered to the inside of the covering sheet 12A of the lower layer absorbent core 13A, or may be adhered to a crotch presser sheet (not shown) adhered to the lower surface of the back sheet 11. Further, it may be bonded between the lower crotch presser sheet to be bonded to the interior sheet 4 and the upper crotch presser sheet to be bonded to the back sheet 11.
[0031]
The total width of the lower absorbent core 13A and the upper absorbent core 13B is preferably about 30 to 250 mm. If the width is less than 30 mm, the amount of absorption is small, and if it exceeds 250 mm, it is difficult to bend into a curved shape due to the contraction force of the crotch elastic member 9. Become. However, it is also possible to make the maximum about 500 mm.
[0032]
The dividing 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 bond the crotch elastic member 9 to the back sheet 11, and if it exceeds 20 mm, it is 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 flexible than the lower absorbent core 13A. ing. The upper absorbent core 13B does not necessarily have 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 wearer's crotch.
[0034]
On both sides of the inner surface (upper surface) of the top sheet 10 of the absorbent main body 3, the base end portions 15a of the rising flaps 15 extending in the diaper front-rear direction X are respectively bonded and raised upward, and the upper ends thereof are The flap 15 is folded inward, and the flap elastic member 16 is attached in the folded state in the diaper front-rear direction X so that the rising flap 15 rises. The inner surfaces of the front and rear end portions of the rising flap 15 are bonded to the top sheet 10 in a lying state.
[0035]
The absorbent main body 3 is set to a length in the diaper longitudinal direction X in which at least the absorbent cores 13 </ b> A and 13 </ b> B are not hung on the body fitting elastic member 7 of the diaper main body 2. However, there is no problem even if the length is applied to the body fitting elastic member 7.
[0036]
The lower absorbent core 13A and the upper absorbent core 13B of the absorbent main body 3 are bonded almost entirely to the top sheet 10 and the back sheet 11 with a hot melt adhesive or the like. The inner sheet 4 of the crotch portion R of the diaper body 2 is almost entirely bonded with a hot melt adhesive or the like.
[0037]
As described above, the leg hole elastic member 8 (A, B) of the diaper main body 2 is cut by a predetermined width W1 in the diaper width direction, and the cut end portion 8a is formed on the absorbent main body 3. It faces so as to be hung on both side edges 3a. The crotch elastic member 9 is not hung.
[0038]
Each of the absorbent cores 13A and 13B is a paper sheet such as tissue paper or a liquid-permeable non-woven fabric sheet obtained by mixing a granular polymer water absorbent with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber. Are covered 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, shape retention means (application of hot melt adhesive, mixing of synthetic fibers) is applied to the hydrophilic fiber aggregate layer or sheet. It doesn't matter. The upper absorbent core 13B is formed by using a sheet-like body (for example, an air-laid absorbent body) obtained by molding the above-mentioned fibers or polymer water-absorbing body into a predetermined shape (such as an hourglass shape or a gourd shape). It doesn't matter.
[0039]
The upper absorbent core 13B is thinner and flexible than the lower absorbent core 13A. For example, when the total thickness of the absorbent cores 13A and 13B is in the range of 2 to 10 mm, the upper absorbent core The core 13B preferably has a thickness of 1 to 3 mm, and the lower absorbent core 13A has a thickness of 4 to 10 mm.
[0040]
Moreover, it is preferable that the upper layer absorbent core 13B makes the basis weight of the hydrophilic fiber aggregate layer in the portion overlapping the dividing gap T of the lower layer absorbent core 13A lower than the basis weight of other portions. As a method of partially lowering the basis weight, there is a method in which unevenness is provided on the conveyor or pattern drum surface for collecting fibers, and the height of the scraping roll that rotates at the time of collecting fibers is set to be convex. In other words, there is a method in which the basis weight is partially lowered by making a difference between a part that accumulates more and a part that accumulates less.
[0041]
The top sheet 10 is preferably a liquid-permeable nonwoven material. For example, non-woven materials using hydrophilic fibers (cellulose, rayon, cotton, etc.), or non-woven materials 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 non-woven material (point bond non-woven fabric, air-through non-woven 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 make it liquid-permeable.
[0042]
The backsheet 11 is made of a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown nonwoven fabric, SMS nonwoven fabric, etc.), plastic film (which may be breathable or non-breathable, but is preferably breathable plastic. Film is preferred) or a composite material thereof. A breathable polyethylene film having a basis weight of 15 to 40 g / m 2 is preferable.
[0043]
The rising flap 15 is made of a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown 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 tissue paper or a liquid-permeable non-woven sheet is used.
[0045]
For the crotch presser sheet (not shown), a water-repellent nonwoven material (spunbond nonwoven fabric, melt blown 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 stretch material (polyurethane yarn, polyurethane film, natural rubber, or the like) that is usually used for disposable diapers, and in a stretched state between the sheet materials, a hot melt adhesive, It is attached by suitable attachment means such as thermal bonding or ultrasonic bonding. A rubber-based hot melt adhesive is preferred.
[0047]
The elastic member 6 for waist is preferably provided with a polyurethane yarn having a fineness of 700 to 2000 dtex and stretched to a magnification of 2.0 to 4.0 times.
[0048]
The body fit elastic member 7 is preferably provided with a polyurethane yarn having a fineness of 300 to 700 dtex and 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 dtex and stretched to a magnification of 1.1 to 3.0 times.
[0050]
The crotch elastic member 9 is preferably provided with polyurethane yarn having a fineness of 300 to 2000 dtex and stretched to a magnification of 1.1 to 4.0 times.
[0051]
The flap elastic member 16 is preferably provided with polyurethane yarn having a fineness of 300 to 2000 dtex and stretched to a magnification of 1.1 to 4.0 times.
[0052]
For joining the above sheet materials, methods such as hot melt adhesive, thermal joining, ultrasonic sealing and the like are appropriately used. For hot melt adhesives, select from hot melt adhesives such as rubber, polyolefin, vinyl acetate, etc., direct coater coating, indirect spiral coating, melt blow (curtain spray) coating, bead coating. Apply by the method. 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 that adheres to the crotch portion R of the diaper main body 2 is provided with a divided lower layer absorbent core 13A and a flexible upper layer absorbent core 13B. By disposing the crotch elastic member 9 so as to be positioned in the division gap T of the lower layer absorbent core 13A, the flexible upper layer absorbent core 13B becomes a wearer's crotch portion via the lower layer absorbent core 13A having the division gap T. The upper absorbent core 13B, which is flexible through the lower absorbent core 13A, is bent into a curved shape by the contracting force of the crotch member 9 and fits into the crotch portion of the wearer. It becomes possible to effectively prevent side leakage such as urine.
[0054]
Further, the flexible upper layer absorbent core 13B covers the dividing gap T of the lower layer absorbent core 13A and suppresses urine and the like from flowing in the dorsoventral direction, so that dorsoventral leakage can be effectively prevented. become.
[0055]
Further, since the rising flaps 15 are provided on both sides of the absorbent main body 3, it is possible to more effectively prevent side leakage of urine and the like.
[0056]
Furthermore, since the cut end portion 8a of the leg hole elastic member 8 in the crotch portion R faces the side edge portions 3a of the absorbent main body 3, the waist portion of the diaper main body 2 seems to be greatly displaced. Even in such a case, due to the contraction force of the leg hole elastic member 8, the close contact state 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 is maintained.
[0057]
In the above embodiment, the absorbent main body 3 is adhered almost entirely 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. 4 (a), the absorbent main body 3 may be bonded almost entirely between the interior sheet 4 and the exterior sheet 5 of the crotch portion R of the diaper body 2 with a hot melt adhesive or the like. good.
[0058]
In this case, the base end portion 15 a of the rising flap 15 is bonded to both side portions of the inner surface (upper surface) of the interior sheet 4 and is raised upward.
[0059]
Moreover, as shown in FIG.4 (b), among the absorptive main bodies 3, the lower layer absorptive core 13A is almost entirely hot between the interior sheet 4 and the exterior sheet 5 of the crotch part R of the diaper main body 2. While adhering with a melt adhesive or the like, the upper absorbent core 13B may be adhered almost entirely to the inner surface (upper surface) of the interior sheet 4 with a hot melt adhesive or the like. If the upper absorbent core 13B is detachably locked with a surface fastener (mechanical fastener) or a peelable adhesive, only the upper absorbent core 13B can be replaced as necessary.
[0060]
Although the said embodiment was the underpants type which heat-joined the side part 2a of the diaper main body 2, the diaper type which latches the front abdominal part P and the back part Q removably using a frontal tape and a fastening tape. Needless to say, it can also be applied.
[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 cross-sectional view taken along the line AA of FIG. 2, FIG. 3B is a cross-sectional view taken along the line BB of FIG. 2, and FIGS. 3C and 3D are perspective views of the lower layer absorbent core. .
FIGS. 4A and 4B are cross-sectional views corresponding to the line AA in FIG. 2 of the modified example, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Diaper main body 3 Absorbent main body 4 Interior (skin surface side) sheet 5 Exterior (outer surface side) sheet 9 Crotch elastic member 13A Lower layer absorbent core 13B Upper layer absorbent core 15 Standing flap T Dividing gap W Diaper Width direction X Diaper anteroposterior direction

Claims (7)

  1. A diaper main body and an absorbent main body joined to the inner surface of the crotch portion of the diaper main body,
    The absorbent main body includes a lower absorbent core having a thickness of 4 to 10 mm , at least a crotch portion divided in a diaper width direction, and a flexible having a thickness of 1 to 3 mm disposed above the lower absorbent core. An upper absorbent core is provided,
    A disposable wearing article, characterized in that an elastic member attached in a stretched state in the front-rear direction of the diaper is disposed in a division gap of the lower layer absorbent core.
  2. A diaper main body, and an absorbent main body joined to the crotch between the outer surface side sheet and the skin surface side sheet of the diaper main body,
    The absorbent main body includes a lower absorbent core having a thickness of 4 to 10 mm , at least a crotch portion divided in a diaper width direction, and a flexible having a thickness of 1 to 3 mm disposed above the lower absorbent core. An upper absorbent core is provided,
    A disposable wearing article, characterized in that an elastic member attached in a stretched state in the front-rear direction of the diaper is disposed in a division gap of the lower layer absorbent core.
  3.   The disposable wearing article according to claim 2, wherein the upper absorbent core is bonded to the inner surface of the skin-side sheet.
  4.   The disposable wearing article according to any one of claims 1 to 3, wherein rising flaps located on both sides of the absorbent main body are provided.
  5. The dividing gap of the lower absorption core is 5 to 20 mm, the upper absorption core is claim 1-4 covering at least the dividing gap excretion vicinity of the crotch portion of the wearer The disposable wearing article according to item 1.
  6. The upper absorption core is disposable wearing article according to any one of claims 1 to 5 formed into substantially the same shape as the underlying absorption core.
  7. The upper absorption core and the lower absorption core is contained and a polymeric adsorption water somatic hydrophilic fiber assembly layer, basis weight of the hydrophilic fiber assembly layer of the upper absorption core is, the lower intake disposable wearing article according to any one of claims 1 to 6, is lower than the basis weight of the other portions in the portion overlapping the divided gap yield core.
JP2003151399A 2003-05-28 2003-05-28 Disposable wearing items Active JP4209719B2 (en)

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JP4942342B2 (en) * 2005-12-26 2012-05-30 大王製紙株式会社 Absorbent articles
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JP5523958B2 (en) * 2010-07-06 2014-06-18 株式会社リブドゥコーポレーション Absorbent articles
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EP2886092B1 (en) 2013-12-19 2016-09-14 The Procter and Gamble Company Absorbent cores having channel-forming areas and c-wrap seals
CN107405242A (en) 2015-03-16 2017-11-28 宝洁公司 Absorbent article with improved core

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