JP2004229695A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper capable of informing the urination clearly and excellently in the appearance. <P>SOLUTION: The disposable diaper 1 has an absorbent body 4 disposed between a liquid-permeable inner sheet 3 and an impermeable and translucent outer sheet 2. A pattern 17 is formed on the inner side surface of the outer sheet 2 in contact with the absorbent body 4 in mixing ink in which an ink not to be changed when brought into contact with moisture and an ink to be changed when brought into contact with moisture are mixed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a disposable diaper for infants, incontinent persons, and the like, and more particularly to a disposable diaper capable of clearly and urgently indicating that urination has occurred.
[0002]
[Prior art]
Disposable diapers are roughly divided into flat type and pants type. Flat type disposable diapers have a structure in which an absorber is interposed between an outer sheet made of a liquid-impermeable sheet and an inner sheet made of a liquid-permeable sheet.From the front waist part to the rear waist part through the crotch part. A front side flap and a rear side flap are formed in a vertically elongated shape and extend outward on both sides at the front waist and the rear waist, respectively. 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 is known a disposable diaper in which means for detecting and displaying the humidity is provided inside an outer sheet of the disposable diaper (for example, Patent Document 1, Patent Reference 2).
[0005]
In addition, a pattern in which a series of alphabet 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 if wet, and the letters of the alphabet on the blocks are It is also known to print with a water-soluble or water-dispersible ink so that when wet by urination, the letters of the alphabet in the wet portion disappear to notify urination (for example, see Patent Document 3). .).
[0006]
Further, there is also known a printing method using a wax material containing a discoloration ink that changes color in response to moisture and urine components.
[0007]
Further, on the inner surface of the outer sheet, a transparent discoloration layer which becomes transparent when in contact with moisture but becomes opaque when not in contact with moisture is formed, and a permeable layer for transmitting moisture is provided on the absorber-side surface thereof. When the urine is not urinated, the color of the discolored layer is visible from the outside and the color of the transmission layer is not visible. Is also known (see, for example, Patent Document 4).
[0008]
[Patent Document 1]
US Pat. No. 3,675,654
[Patent Document 2]
US Patent No. 3,952,746
[Patent Document 3]
US Pat. No. 4,022,211.
[Patent Document 4]
Japanese Utility Model Laid-Open No. 3-58416 [0012]
[Problems to be solved by the invention]
However, the display means disclosed in Patent Literature 1 and Patent Literature 2 is simply displayed at a predetermined position when urinating, so that, for example, it is necessary to clearly and visually inform the infant so that the situation is recognized. There is a problem that can not be.
[0013]
Further, in the configuration disclosed in Patent Document 3, although the letters of the alphabet in the portion wetted by urination disappear, even though it disappears, the one printed with the water-soluble ink actually spreads thinly as it gets wet. As a result, there is a problem that the disappeared portion looks dirty and cannot be clearly and clearly displayed.
[0014]
Further, in the case of printing a wax material containing a discoloration ink that changes color in response to moisture and urine components, since the color changes in response to moisture and urine components, the above-described problem of disappearing while dirty and blurred is improved, Due to the high viscosity of the wax material, it is difficult to transfer even if a pattern is formed on a roller and transfer printing is performed, so that the design of the display pattern is extremely inconvenient, and there is a problem that it is not possible to notify clearly and good appearance. .
[0015]
Further, in the configuration disclosed in Patent Document 4, when moisture contacts the discoloration layer due to urination, the discoloration layer becomes transparent and the colored pattern of the transmission layer becomes visible, thus theoretically improving the above problem. However, there is a problem that it is extremely difficult to perform the overprinting so as to obtain the above effect.
[0016]
An object of the present invention is to provide a disposable diaper that can be clearly and visually informed when urinating and that can be easily implemented in view of the above conventional problems.
[0017]
[Means for Solving the Problems]
The disposable diaper of the present invention is a disposable diaper in which an absorber is interposed between a liquid-permeable inner sheet and a liquid-impermeable outer sheet, wherein the inner surface of the outer sheet in contact with the absorber is in contact with moisture. The pattern is formed using a mixed ink formed by mixing an ink that does not change even when it comes into contact with moisture.
[0018]
According to this configuration, before urination, the pattern presents a mixed color of the color of the ink that does not change even when it comes into contact with moisture and the color of the ink that changes when it comes into contact with the water. The color of the pattern changes as a result of contact with moisture, and the color of the pattern changes, and the color change of the pattern can clearly and visually inform the infant so that the situation can be recognized. Since an arbitrary pattern can be formed only by performing normal printing using the mixed ink on the side surface, it can be easily implemented.
[0019]
In addition, if the ink that changes when it comes into contact with water is a water-soluble ink that dissolves in water and disappears, the water-soluble ink spreads thinly while spreading, but does not change when it comes into contact with water. Since the color of the ink is the main single color, it is almost inconspicuous and can be clearly and clearly displayed.
[0020]
In addition, when the ink that changes when it comes into contact with moisture is a discolored ink that changes color when the ink comes into contact with moisture or urine components, it becomes another mixed color, so that the color change can be varied and more clearly and visually appealing. I can inform you well.
[0021]
Further, by combining a pattern using the mixed ink and a pattern using the ink that does not change even when it comes into contact with moisture, it is possible to obtain a pattern configuration that is more excellent in design and emphasizes a change in the pattern. , Can be more clearly and visually appealing.
[0022]
In addition, a pattern using a mixed ink and a pattern made of a water-soluble ink that dissolves in water and dissolves when contacted with moisture, or a pattern using a mixed ink and a discolored ink that changes color when contacted with moisture or urine components Even when the pattern is combined with the pattern, the pattern configuration can be similarly excellent in design and the change in the pattern is emphasized, and the notification can be made clearer and more attractive.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment 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. The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.
[0024]
FIG. 1 shows an overall configuration of a flat disposable diaper 1. This disposable diaper 1 has a structure in which an absorber 4 (see FIG. 3) is interposed between a liquid-impermeable outer sheet 2 and a liquid-permeable inner sheet 3, and a front waist portion 5 to a crotch portion 6. It is formed in a vertically long shape that reaches the rear waist portion 7 through the rear. As shown in FIG. 3, the outer sheet 2 is formed by adhering a thin nonwoven fabric 2b for giving a cloth-like feel to an outer surface of a liquid-impermeable sheet 2a such as a transparent or translucent polyethylene sheet. Reference numeral 3 is made of a nonwoven fabric.
[0025]
Between the front waist portion 5 and the rear waist portion 7, elastic stretch members such as thread rubber are arranged in an extended state on both sides of the absorber 4 and joined to the sheets 2 and 3 to form a three-dimensional gather portion 8 and gathering The front waist portion 5 and the rear waist portion 7 are configured such that a tape-shaped elastic elastic member made of foamed polyurethane or the like is joined to the gathered sheets 2 and 3 so as to fit the waist. Have been. The front waist portion 5 and the rear waist portion 7 are respectively provided with a front side flap 11 and a rear side flap 12 extending outward on both sides.
[0026]
A fastening tape 13 is provided on the rear side flap 12, and a front target tape 14 serving as a fastening surface of the fastening tape 13 is provided on the front waist portion 5. The front target tape 14 is provided with an easily peelable surface constituting a fastening surface on the surface thereof, and a mark pattern 14a is displayed.
[0027]
When the disposable diaper 1 is worn, the back waist 7 is applied to the back of the wearer and the front waist 5 is applied to the abdomen, and the fastening tape 13 is applied to the wearer according to the wearer's physique and body shape using the mark pattern 14a as a guide. The fixing position is determined, and the fixing position is fixed to the front target tape 14 as shown in FIG. A leg opening is formed by the fastening of the fastening tape 13, and the crotch portion of the wearer is wrapped with the outer edge portion 9, and the three-dimensional gather portion 8 is located inside the outer edge portion 9 to prevent leakage of urine.
[0028]
In the disposable diaper 1 having such an overall configuration, as shown in FIG. 2, a pattern 15 for improving the design of the disposable diaper 1 is provided on the lower abdomen of the front waist portion 5. The pattern 15 is preferably formed by printing with an arbitrary ink on the outer surface side of the liquid impermeable sheet 2a of the outer sheet 2 so as to be clearly seen from the outer surface of the outer sheet 2. In some cases, printing may be performed on the inner surface side of the liquid impermeable sheet 2a using a water-insoluble ink.
[0029]
In addition, a pattern 16 for notifying urination is provided at the front of the crotch portion 6. The pattern 16 may be arranged in a line from the front waist portion 5 to the rear waist portion 7. The pattern 16 indicating urination is constituted by a combination of a variable pattern 17 and an invariable pattern 18 surrounding the pattern. As shown in FIG. 3, the variable pattern 17 and the invariable pattern 18 are formed by printing on the outer surface of the liquid impermeable sheet 2 a that is in contact with the absorber 4 of the outer sheet 2. The invariable pattern 18 is formed by printing on the outer surface of the liquid impermeable sheet 2a.
[0030]
The variable pattern 17 is formed by printing with a mixed ink obtained by mixing an ink such as a water-insoluble ink which does not change even when it comes into contact with water, and a water-soluble ink which dissolves in the water and disappears. For example, the variable pattern 17 indicating "fish" in the illustrated example is printed with a dark blue mixed ink composed of a pigment type red water-insoluble ink and a dye type dark blue water-soluble ink. are doing.
[0031]
Further, the invariable pattern 18 is formed by printing with an arbitrary ink on the outer surface side of the liquid impermeable sheet 2a of the outer sheet 2 like the pattern 15. For example, the invariable pattern 18 indicating “underwater” in the illustrated example is printed with a dark blue pigment type or dye type ink. Note that, as in the case of the pattern 15, the invariable pattern 18 may be printed and formed with a water-insoluble ink on the inner surface side of the liquid impermeable sheet 2a in some cases.
[0032]
Pigments such as inorganic pigments and organic pigments are used for the water-insoluble ink. 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.
[0033]
According to the above configuration, the variable pattern 17 of the pattern 16 indicating urination changes the color (dark dark blue) of the mixture of the color of the water-insoluble ink (red) and the color of the water-soluble ink (dark blue) before urination. After urination, the water-soluble ink dissolves and changes to a color (red) of only the water-insoluble ink. In particular, in the present embodiment, before urination, the variable pattern 17 and the invariable pattern 18 are the same dark blue color as shown in FIG. After urination, what was in the combined state, as shown in FIG. 4 (b), the dark blue dye type ink in the variable pattern 17 was melted out by the moisture accumulated in the absorber 4, and the red pigment By leaving only the non-water-soluble ink of the type, the “fish” of the variable pattern 17 changes to red, and the “fish” of the red color rises and appears clearly in the “underwater” of the dark blue invariable pattern 18. The state is changed to a state in which the pattern 16 and the pattern 15 in which the “fish” exists in the water are combined.
[0034]
As described above, in the present embodiment, as the pattern 16 indicating urination, the variable pattern 17 using the mixed ink and the invariable pattern 18 using the ink that does not change even when it comes into contact with moisture are combined, so that the design is excellent and the design is excellent. The change in the pattern 16 is emphasized, so that the infant can be clearly and clearly displayed so that the situation is recognized. In addition, since any pattern can be formed on the inner surface of the liquid impermeable sheet 2a of the outer sheet 2 only by performing normal printing using the mixed ink, it can be easily implemented.
[0035]
Further, if the water-insoluble ink and the water-soluble ink are mixed with the mixed ink of the variable pattern 17, the water-soluble ink becomes thin and diffuses while bleeding, but the color (red) of the water-insoluble ink is mainly a single color. Therefore, it is almost inconspicuous and can be clearly and clearly displayed.
[0036]
In the above description of the embodiment, the example in which the mixed ink of the water-soluble ink and the non-water-soluble ink is used for the variable pattern 17 has been described. A mixed ink of a color changing ink that changes color to transparent and a water-insoluble ink may be used. By using the mixed ink containing the discoloration ink that reacts and changes color when the variable pattern 17 comes into contact with water or urine components, the degree of freedom of color combination can be increased, and the pattern can be more clearly emerged.
[0037]
Further, in the above-described embodiment, the example in which the pattern 16 for informing urination is composed of a combination of the variable pattern 17 and the invariable pattern 18 has been described, but the pattern 16 for informing urination may be composed of only the variable pattern 17. As shown in FIG. 5A, the variable pattern 17 may have a configuration in which a simple line or a plurality of patterns are arranged in a line.
[0038]
Further, as shown in FIG. 5B, a pattern 16 for informing urination is composed of a variable pattern 17 using mixed ink and a pattern 19 made of water-soluble ink which dissolves in water and disappears when the ink comes into contact with water. Even in combination with the pattern 19 made of a discolored ink which changes color by reacting with water or urine components instead of the pattern 19 made of the water-soluble ink, the design is similarly excellent and the change of the pattern is emphasized. Such a pattern configuration can be provided, and the notification can be made clearer and more attractive.
[0039]
【The invention's effect】
According to the disposable diaper of the present invention, before urination, the pattern exhibits a mixed color of the color of the ink that does not change even when it comes into contact with water and the color of the ink that changes when it comes into contact with the water. The color of the pattern changes due to the change in color when the ink comes into contact with the ink that changes when it comes into contact, and the color change of the pattern can clearly and visually appeal to the infant so that the child can recognize the situation. In addition, an arbitrary pattern can be formed only by performing normal printing using the mixed ink on the inner surface of the outer sheet, so that it can be easily implemented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of an embodiment of a disposable diaper according to the present invention.
FIG. 2 is a front view of the disposable diaper of the embodiment.
FIG. 3 is an enlarged sectional view taken on line AA of FIG. 2;
4A and 4B show an example of a pattern in the embodiment, wherein FIG. 4A is a front view of a state before urination, and FIG. 4B is a front view of a state after urination.
FIG. 5 is an explanatory diagram of various modifications of the pattern in the embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 disposable diaper 2 outer sheet 3 inner sheet 4 absorber 16 pattern indicating urination 17 variable pattern using mixed ink 18 invariable pattern 19 pattern of water-soluble ink

Claims (6)

In a disposable diaper in which an absorber is interposed between a liquid-permeable inner sheet and a liquid-impermeable outer sheet, ink and water that do not change even when they come into contact with water are applied to the inner surface of the outer sheet that is in contact with the absorber. A disposable diaper characterized by forming a pattern using a mixed ink formed by mixing ink that changes when it comes into contact with the diaper. 2. The disposable diaper according to claim 1, wherein the ink that changes upon contact with water is a water-soluble ink that dissolves in water and disappears. The disposable diaper according to claim 1, wherein the ink that changes when it comes into contact with moisture is a discolored ink that changes color when the ink comes into contact with moisture or urine components. The disposable diaper according to any one of claims 1 to 3, wherein a pattern using the mixed ink and a pattern using an ink that does not change even when contacted with moisture are combined. The disposable diaper according to any one of claims 1 to 3, wherein a pattern using the mixed ink is combined with a pattern using a water-soluble ink that dissolves in water and disappears when it comes into contact with water. The disposable diaper according to any one of claims 1 to 3, wherein a pattern using the mixed ink and a pattern using a discolored ink that changes color when it comes into contact with moisture or urine components are combined.

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