JP2004236826A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper, surely informing leakage when the capacity of an absorber becomes close to the limit. <P>SOLUTION: This disposable diaper is formed by interposing the absorber 4 between a liquid permeable inner surface sheet 3 and a liquid impermeable outer surface sheet 2, and provided with a leakage informing means allowing the absorber 4 discolored due to contact with water when it absorbs water to be seen from the outside of the outer surface sheet 2. A pattern 14 as the leakage informing means is disposed at the peripheral area 11 of a leg region. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disposable diaper for infants, incontinent persons, and the like, and more particularly, to a disposable diaper capable of notifying that the absorption of urine by an absorber is near a limit.
[0002]
[Prior art]
Disposable diapers are roughly divided into flat type and pants type. Flat-type disposable diapers have an absorbent body between an outer sheet made of a liquid-impermeable sheet and a cloth-like feel by attaching a nonwoven fabric to the outer surface, and an inner sheet made of a liquid-permeable sheet such as nonwoven cloth. With the interposed structure, the front side flap and the rear side flap which are formed in a vertically long shape from the front waist part to the rear waist part through the crotch part and extend outward on both sides to the front waist part and the rear waist part respectively Is provided. A fastening tape is provided on the rear side flap, a front target tape is provided on the front waist, and the rear waist is applied to the back of the wearer and the front waist is applied to the abdomen, and the rear side flap is provided. The disposable diaper is configured to be attached by fastening the fastening tape of the flap to the front target tape on the front waist portion.
[0003]
The pants-type disposable diaper is formed by joining the front side flap and the rear side flap of the flat type disposable diaper in advance to form a pair of left and right leg openings and a waist opening.The basic structure is the same as the flat type disposable diaper. is there.
[0004]
In order to notify urination while wearing such a disposable diaper, there has been known a disposable diaper in which a wetting information means for detecting and displaying moisture is disposed inside an outer sheet of the disposable diaper (for example, Patent Document 1). And Patent Document 2.).
[0005]
In addition, as a means of reporting wetting, a pattern in which a series of alphabetic blocks are scattered is printed on the inner surface of the outer sheet, and the outer frame line of each block is printed using ink that does not melt even when wet, and It is known that the letters of the alphabet are printed with a water-soluble or water-dispersible ink, and when wet by urination, the letters of the alphabet in the wetted part disappear so that urination is notified (for example, And Patent Document 3.).
[0006]
[Patent Document 1]
US Pat. No. 3,675,654
[Patent Document 2]
US Patent No. 3,952,746 [0008]
[Patent Document 3]
US Pat. No. 4,022,211.
[Problems to be solved by the invention]
By the way, the wetting notification means disclosed in each of the above patent documents is disposed mainly in the crotch portion inside the outer sheet of the disposable diaper, and when the crotch portion of the built-in absorber becomes wet due to urination of the user. It is immediately notified that the wetness notification means functions and the urine is excreted by the moisture, but thereafter, only the notification state is maintained, and the capacity of the absorber reaches the limit by urinating multiple times. Even when the condition is reached, it is not possible to know that, and there is a problem that it is not known whether it is necessary to change diapers urgently or if there is still room.
[0010]
An object of the present invention is to provide a disposable diaper that can reliably notify when the capacity of an absorber is close to a limit in view of the above-described conventional problems.
[0011]
[Means for Solving the Problems]
The disposable diaper of the present invention is formed by interposing an absorber between a liquid-permeable inner sheet and a liquid-impermeable outer sheet, and when the absorber absorbs water, it comes into contact with the water and changes color. In a disposable diaper provided with a wetting notifying means whose state can be seen from the outside of the outer sheet, the wetting notifying means is disposed around the leg.
[0012]
According to such a configuration, when the capacity of the absorber is close to the limit and urine leakage is likely to occur from around the leg, it is surely known that the wetting notification means disposed on the around leg portion functions before that. By changing the diaper at that time, it is possible to reliably prevent urine leakage without having to change the diaper every time urination occurs. In addition, the effect that the design can be improved by displaying the pattern of the wetting notification means on the leg circumference can be expected.
[0013]
Also, if wetting means is also provided at the front of the crotch area, when the absorbent becomes wet due to urination, it is possible to know even if there is room in the capacity of the absorbent, so diaper replacement is absolutely necessary It is forewarned that the notification will be given soon, and usability can be further improved.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the disposable diaper of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Note that the embodiments described below show examples embodying the present invention, and do not limit the technical scope of the present invention.
[0015]
(1st Embodiment)
First, a first embodiment in which the present invention is applied to a pants-type disposable diaper will be described with reference to FIGS.
[0016]
In FIG. 1, reference numeral 1 denotes a pants-type disposable diaper, which is made of a liquid impermeable sheet 2b such as a PE sheet and a nonwoven fabric 2a attached to an outer surface of the diaper to give a cloth-like feel and a liquid permeation of a nonwoven fabric. A rectangular sheet base 5 composed of inner sheets 3 made of conductive sheets and absorbers 4 interposed therebetween is used. A hole 5a is formed at both sides of the center of the sheet base 5 and bent at the center, and both side edges 5b are connected to each other by heat sealing to form a trunk 6, and a leg opening is formed at the hole 5a. A portion 7 is formed. A cord rubber 9 is built in the trunk opening 8 of the trunk 6.
[0017]
Around the leg 5a forming the leg opening 7 of the sheet base 5, a leg surrounding portion 11 is provided which is tightly fitted around the leg so that urine does not leak from a gap formed between the leg 5a and the leg. ing. As shown in detail in FIG. 2, the leg circumference portion 11 is configured by a leg circumference sheet 12 made of a liquid permeable sheet such as a nonwoven fabric folded in a U-shaped cross section, and one side edge thereof is formed on an outer surface. The sheet 2 is adhered to the nonwoven fabric 2a, and the other side is adhered to the side edge of the inner sheet 3 bent in a U-shape so as to enclose the absorber 4. A liquid-impermeable sheet 2b is attached to the inner surface of the leg-surrounding sheet 12 at a portion continuous to the outer sheet 2 except for the outer edge, and urine leakage from the leg-surrounding portion 11 is prevented. Has been prevented. Further, in order to make this leg-around portion 11 a gather portion that adheres to the leg, a plurality of (five in the illustrated example) thread rubbers 13 are arranged at appropriate intervals inside the U-shaped folded-around leg-around sheet 12. Built-in.
[0018]
Also, on the inner surface of the part of the leg part 11 that is folded back toward the inner sheet 3 of the leg part sheet 12, as a wetting notification means, a pattern that melts and disappears when it comes in contact with urine or moisture or changes its color to another color 14 is formed by printing. The pattern 14 is preferably formed over a width region from a position about 10 mm inside the absorber 4 to a position about 5 mm from the outer end of the leg-around sheet 12.
[0019]
In the example shown in FIG. 3, the pattern 14 is formed by printing with a water-insoluble ink and does not change even when it comes into contact with moisture. It is composed of a variable pattern 16 that forms a ground pattern that melts and disappears upon contact. In the illustrated example, the variable pattern 16 is a blue ground pattern indicating underwater, the invariable pattern 15 is a fish-shaped red pattern that swims in the water, and the pattern 14 is distributed because the capacity of the absorber 4 is limited. When wet, the variable pattern 16 melts and disappears, so that only the fish-shaped red invariable pattern 15 is formed and the wet state is notified.
[0020]
As the water-insoluble ink, a pigment such as an inorganic pigment or an organic pigment is used. As the inorganic pigment, titanium dioxide, alumina white, zinc sulfide, navy blue, precipitated barium sulfate, precipitated calcium carbonate, hydrated silicate, manganese violet, aluminum powder, carbon black and the like are used. As organic pigments, naphthol green B, naphthol yellow S, lithol red, fast yellow, chromophtal yellow, chromophtal red, peacock blue lake, alkali blue lake, rhodamine lake, phthalocyanine blue, anthrapyridine yellow, quinacridone red, Dioxazine violet, isoindolinone yellow, daylight fluorescent pigments and the like are used. As the water-soluble ink, a dye (which is dissolved in a solvent such as water or an organic solvent and dyed in a molecular state) can be used.
[0021]
Also, preferably, as shown by the imaginary line in FIG. 1, a pattern 17 as a wetting notification means is provided on the inner surface side of the liquid impermeable sheet 2b of the outer sheet 2 at a position in front of the crotch portion of the disposable diaper 1. Is arranged. In the illustrated example, the pattern 17 includes a fishbowl-shaped invariable pattern 18 drawn with a water-insoluble ink and a goldfish-shaped variable pattern 19 drawn with a water-soluble ink. It is configured to notify that the goldfish disappears when it disappears.
[0022]
According to the disposable diaper 1 having the above-described configuration, when the capacity of the absorbent body 4 is near the limit and urine leakage is likely to occur from the leg circumference 11, the pattern 14 disposed on the leg circumference 11 before that occurs. The variable pattern 16 forming the ground pattern of the pattern 14 melts and disappears due to the wetting, and only the fish-shaped red invariable pattern 15 remains, so that the wet state is notified, and urine leakage from the leg circumference 11 occurs. It is possible to know that it is just before. Therefore, by exchanging the disposable diaper 1 at this point, it is possible to reliably prevent urine leakage without having to change the diaper every time urination occurs. In addition, an effect that the design can be improved by displaying an appropriate pattern 14 on the leg circumference 11 can be expected.
[0023]
In addition, by disposing the pattern 17 also at the position of the front of the crotch portion of the disposable diaper 1, if the user urinates and the absorber 4 gets wet, urination occurs even when there is room in the capacity of the absorber 4. It is possible to know that the urine leak has not yet occurred from the leg circumference 11, but it is foreseen that there is a possibility that it will occur soon, so that the usability can be further improved.
[0024]
In the description of the above-described embodiment, as the wetting notification means of the leg circumference 11, a pattern 14 having an invariable pattern 15 and a variable pattern 16 so that the variable pattern 16 disappears when wet and only the invariable pattern 15 remains. Although the variable pattern 16 does not disappear, a color that changes color to another color may be used. Also, the variable pattern 16 is wetted from the state where the invariable pattern 15 is hidden by the variable pattern 16 and cannot be seen. It may be configured such that the invariable pattern 15 can be seen by disappearing or discoloring. Further, the wetness notifying means may be constituted by a simple line-shaped or band-shaped colored band which disappears or changes color when wet, instead of the pattern 14.
[0025]
Further, in the description of the above-described embodiment, an example in which the pattern 17 as the crotch portion wetting notification means is provided only at the front portion of the crotch portion, but this pattern 17 is provided at least at the front portion of the crotch portion. Of course, it goes without saying that the disposable diaper 1 may be disposed substantially at the center in the width direction over substantially the entire length in the front-rear direction.
[0026]
Further, in the above-described embodiment, the example in which the leg-surrounding sheet 12 constituting the leg-surrounding portion 11 extends laterally from the outer surface of the side edge portion of the absorber 4 has been described. As a modification of this embodiment, FIG. As shown in FIG. 4, a configuration may be adopted in which the side portion of the absorber 4 is rolled up by a leg-surrounding sheet 12 in which the liquid impermeable sheet 2b is arranged over almost the entire width of the inside. More specifically, the side edge of the inner sheet 3 is folded back to the outer side so as to wrap the side edge of the absorber 4, and the side edge of the outer sheet 2 is folded back to the side edge of the inner sheet 3. It is welded in a state of being overlapped on the part. The leg-surrounding sheet 12 is folded back in a U-shape over the entire width, and the liquid-impermeable sheet 2b is disposed substantially over the entire width inside. The portion near the overlapped side edge portion is the side edge portion of the absorber 4. It is superposed so as to wrap around from the outer surface side to the inner surface side and heat-welded, and a plurality of thread rubbers 13 are arranged at appropriate intervals inside the leg-around sheet 12 to form the leg-around portion 11.
[0027]
The pattern 14 is printed on the inner surface of the liquid-impermeable sheet 2b disposed inside the leg-hole sheet 12 from the side edge of the absorber 4 to the vicinity of the folded end of the leg-hole sheet 12. It goes without saying that the same operation and effect can be obtained also in this modification.
[0028]
(Second embodiment)
Next, a second embodiment in which the present invention is applied to a flat disposable diaper will be described with reference to FIGS.
[0029]
In FIG. 5, the disposable diaper 21, as shown in FIG. 6, is formed of an outer sheet 22 and a non-woven cloth formed by attaching a nonwoven fabric 22a to an outer surface of a liquid impermeable sheet 22b such as a PE sheet to give a cloth-like feel. The absorbent body 24 is interposed between the inner sheet 23 and the inner sheet 23, and is formed in a vertically long shape extending from the front waist portion 25 to the rear waist portion 27 through the crotch portion 26.
[0030]
The front waist portion 25 and the rear waist portion 27 are gathered by being joined to the sheets 22 and 23 in a state where a tape-shaped elastic elastic member made of foamed polyurethane or the like is extended, and are configured to fit the waist. I have. The front waist portion 25 and the rear waist portion 27 are provided with front side flaps 28 and rear side flaps 29 extending outward on both sides, respectively. A fastening tape 30 is provided on the rear side flap 29, and a front target tape 31 serving as a fastening surface of the fastening tape 30 is provided on the front waist portion 25. The front target tape 31 is provided with an easily peelable surface constituting a fastening surface on its surface, and a mark line 31a is displayed.
[0031]
Between the front waist portion 25 and the rear waist portion 27, the nonwoven fabric 22a of the outer sheet 22 extends outward beyond the both side edges of the absorber 24 and is folded back into a U-shaped cross section, and a plurality of extended states are formed inside. Gathered outer edges 32 are formed by adhering the thread rubbers 33 arranged in parallel at appropriate intervals, and the nonwoven fabric 22a and the inner sheet 23 are bonded at the side of the absorber 24 of the outer edges 32. Further, the nonwoven fabric 22a is extended inside the inner sheet 23, and the three-dimensional gather portion 34 is formed by folding the front end thereof and bonding it in a state where the rubber thread 35 in an extended state is built therein. . The outer edge part 32 and the three-dimensional gather part 34 constitute a leg circumference part 36 for preventing urine leakage from around the leg.
[0032]
When the disposable diaper 21 is worn, the back waist portion 27 is applied to the back of the wearer and the front waist portion 25 is applied to the abdomen, and the fastening tape 30 is applied according to the physique and body type of the wearer using the mark line 31a as a guide. The fastening position is determined, and the fastening is made to the front target tape 31. The fastening of the fastening tape 30 forms a leg opening, wraps the wearer's crotch in the outer edge portion 32, and the three-dimensional gather portion 34 is positioned inside the outer edge portion 32, thereby preventing leakage of urine.
[0033]
In the disposable diaper 21 having such an overall configuration, the wetting notification unit 37 is formed by printing on the inner surface of the nonwoven fabric 22a between the outer edge 32 of the leg circumference 36 and the three-dimensional gather 34. As the specific configuration of the wetting notification unit 37, the pattern 14 of the first embodiment and the like are applied.
[0034]
Also in the above configuration, when the capacity of the absorber 24 is close to the limit and urine leakage is likely to occur from the leg circumference 36, the wetness notifying means 37 disposed on the leg circumference 36 before that functions. The wet state is notified, and it is possible to reliably know that it is immediately before urine leakage occurs from the leg circumference 36. Therefore, by exchanging the disposable diaper 21 at this time, it is possible to reliably prevent urine leakage without replacing the diaper every time urination occurs.
[0035]
In the illustrated examples of FIGS. 5 and 6, an example is shown in which the leg circumference 36 includes the outer edge 32 and a single solid gather 34, but as shown in FIG. An outer three-dimensional gather portion 38 is formed on the outer edge portion 32 at the outer position, and a leg circumference portion 36 is formed by the outer edge portion 32, the outer three-dimensional gather portion 38, and the three-dimensional gather portion 34, thereby preventing urine leakage in three stages. In the disposable diaper to be performed, the same operation and effect can be obtained by printing and forming the wetness notifying means 37 between the outer edge portion 32 and the outer three-dimensional gather portion 38.
[0036]
In FIG. 7, the nonwoven fabric 22a is folded back into a U-shape to form the outer edge 32, and the distal end side is extended inward to be folded back into a U-shape, and the thread rubber 39 in an extended state is placed inside the folded-back portion. The outer three-dimensional gather portion 38 is formed by adhering in a state of being incorporated, and adhering the leading end thereof to the outer sheet 22 with one side edge of the band-shaped nonwoven fabric 40 interposed therebetween. 22 is attached to the side of the absorber 24 in a state where the side edge of the inner sheet 23 is sandwiched therebetween, and the belt-shaped nonwoven fabric 40 is further extended to the inside of the inner sheet 23, and the tip thereof is folded back. The three-dimensional gather portion 34 is formed by adhering a state in which a thread rubber 35 in an extended state is built in.
[0037]
In the above embodiment, the wetting notifying means 14 and 37 are visible from outside the outer sheets 2 and 22 through the liquid impermeable sheets 2b and 22b such as PE sheets and the nonwoven fabrics 2a and 22a. If the light transmittance of the conductive sheets 2b and 22b is low, it may be difficult to visually recognize the light. Therefore, the liquid-impermeable sheets 2b and 22b may be formed of highly transparent sheets in the leg portions 11 and 36 as necessary.
[0038]
Also, in FIGS. 2, 4, 5, and 6, the sheets are partially shown in a separated state for easy understanding of the structure. Is glued.
[0039]
【The invention's effect】
According to the disposable diaper of the present invention, since the wetting information means is disposed on the leg area, when the capacity of the absorber is near the limit and urine leakage is likely to occur from the leg area, the urine leaking part is provided before the urine leak. It can be surely known that the disposed wetting notification means functions, and by changing diapers at that time, it is possible to reliably prevent urine leakage without having to change diapers every time urination occurs, In addition, the effect that the design property can be improved by displaying the pattern of the wetting notification means on the leg circumference can be expected.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a first embodiment of a disposable diaper according to the present invention.
FIG. 2 is an exploded enlarged sectional view taken on line AA of FIG. 1;
FIG. 3 is a view taken in the direction of arrows BB in FIG. 2;
FIG. 4 is a sectional view similar to FIG. 2 of a modification of the embodiment.
FIG. 5 is a perspective view showing a configuration of a second embodiment of the disposable diaper of the present invention.
FIG. 6 is an exploded enlarged sectional view taken along the line CC of FIG. 5;
FIG. 7 is a sectional view similar to FIG. 5 of a modification of the embodiment.
[Explanation of symbols]
1,21 Disposable diaper 2,22 Outer sheet 3,23 Inner sheet 4,24 Absorber 11 Leg circumference 14 Pattern (wetting notification means)
17 Wetting notification means 36 Leg circumference 37 Wetting notification means

Claims (2)

A state in which an absorber is interposed between the liquid-permeable inner sheet and the liquid-impermeable outer sheet, and when the absorber absorbs moisture, the discolored state comes in contact with the moisture from the outside of the outer sheet. What is claimed is: 1. A disposable diaper having a visible wetting information means, wherein the wetting information means is arranged around a leg. The disposable diaper according to claim 1, wherein a wetting notification means is also provided at a front part of the crotch part.

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