JP2004057640A - Throw-away diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a throw-away diaper, enabling a child to easily understand the situation of urination by appearance of a pattern caused in response to urination, and usable simply and at a low cost. <P>SOLUTION: In this throw-away diaper, an absorber 4 is interposed between a liquid permeable inner surface sheet 3 and a semi-transparent outer surface sheet 2. An invariable pattern 16 which will not be varied in spite of contact with water is formed on the inside surface coming into contact with the absorber 4 of the outer surface sheet 2, and a variable pattern 17 is formed on the invariable pattern 16 to be colored to make the invariable pattern 16 substantially invisible and changed to make the invariable pattern 16 visible when it touches water in partly or entirely overlapping parts. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disposable diaper intended for infants, incontinent persons, and the like, and more particularly to a disposable diaper capable of clearly indicating urination and giving an image capable of giving an accurate impression to infants and the like.
[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]
U.S. Pat. No. 3,675,654 and U.S. Pat. No. 3,675,654 disclose means for detecting and displaying moisture inside an outer sheet of a disposable diaper in order to notify urination while wearing such a disposable diaper. No. 3,952,746.
[0005]
U.S. Pat. No. 4,022,211 discloses printing a pattern in which a series of alphabetic blocks are scattered on the inner surface of an outer sheet, and printing the outer frame line of each block using an ink that does not melt even when wet. Then, the letters of the alphabet on the block are printed with a water-soluble or water-dispersible ink, and when wet by urination, the letters of the alphabet in the wet part disappear, thereby informing the user of urination. ing.
[0006]
Further, Japanese Utility Model Laid-Open No. 3-58416 discloses that an inner surface of an outer sheet becomes transparent when it comes into contact with moisture, but forms an opaque discoloring layer when it is not in contact with moisture. A permeable layer is provided, and the permeable layer is colored so that it does not change color even when it comes into contact with moisture. There is disclosed one in which the coloring of the transmission layer is made visible by making the color changing layer transparent.
[0007]
[Problems to be solved by the invention]
However, as disclosed in U.S. Pat. No. 3,675,654 and U.S. Pat. No. 3,952,746, simply informing the child of urination requires the infant to use the disposable diaper after urination in order to perform toilet training for the infant. Even if you show it, it is difficult to understand the situation.
[0008]
In the configuration disclosed in U.S. Pat. No. 4,022,211, the letters of the alphabet that are wetted by urination disappear. However, even if they disappear, those printed with the water-soluble ink actually get wet. However, since the thinned portion spreads while bleeding, the disappeared portion looks dirty, and it is difficult for the infant to recognize the difference from the state where the character was present even if the character has disappeared. It is difficult to show the disposable diaper after urination.
[0009]
In the configuration disclosed in Japanese Utility Model Laid-Open Publication No. 3-58416, when moisture contacts the discoloration layer due to urination, the discoloration layer becomes transparent and the colored pattern of the transmission layer becomes visible. By showing the disposable diaper, it is possible to easily understand the situation of urination, but a discoloration layer having a thickness of about 10 to 30 μm is formed on the inner surface of the outer sheet, and a transmission layer having a colored pattern is formed thereon. Because of the necessity, there is a problem that the cost for forming these layers by printing increases, and it is difficult to stably and reliably obtain the function of the discoloration layer.
[0010]
An object of the present invention is to provide a disposable diaper that can be easily understood by a baby by urinating a pattern when urination occurs, and that can be performed easily and at low cost. I do.
[0011]
[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, translucent outer sheet. Forms an invariable pattern that does not change even when it comes in contact with it, and has a color that makes the invariable pattern almost invisible at the overlapped portion and overlies part or all of the invariant pattern, and the invariable pattern is visible when in contact with moisture The variable pattern is formed in such a way that before the urination, the invariable pattern is almost invisible due to the relationship between the invariable pattern and the color of the variable pattern, and when the moisture contacts the variable pattern due to urination, the variable pattern changes. By forming a constant pattern on a subject that is of interest to infants, the infant can be shown a disposable diaper after urination, making it easier to understand the situation of urination. It can be used for educational purposes by talking about the pattern and talking with infants, and simply printing the invariable pattern and variable pattern on the inner surface of the outer sheet using each ink It can be implemented simply and at low cost.
[0012]
Invariant patterns are formed by printing with a water-insoluble ink, and variable patterns are formed by printing with a water-soluble ink that dissolves when contacted with water. The variable pattern disappears as a result, and as a result, the invariable pattern clearly appears and the pattern appears. In addition, even if the disappeared part becomes slightly dirty by spreading and thinning while the disappearing pattern blurs, since the invariable pattern that appears is clear, the stain is not only inconspicuous, but also a thin ground pattern An aesthetically pleasing pattern will appear.
[0013]
Also, when the invariable pattern is formed by printing with a water-insoluble ink and the variable pattern is formed by printing with a discoloring ink that reacts and changes color when it comes into contact with water or urine components, moisture and urine components are added to the discolored ink by urination. The contact changes the color of the variable pattern, and as a result, the invariable pattern clearly emerges and the pattern appears.
[0014]
In addition, the invariant pattern consists of a contour line and a line drawing pattern drawn inside as necessary, and the variable pattern is solid printed on the entire surface of the contour line. The appearance of the internal line drawing pattern makes the pattern appear more clearly.
[0015]
In addition, the invariable pattern is composed of a line drawing pattern, and if the variable pattern is a solid print pattern formed by overlapping a part of the line drawing pattern, the pattern can be greatly changed, giving a stronger impression to infants. be able to.
[0016]
In addition, by making the color of the water-insoluble ink and the color of the water-soluble ink or the color-changed ink before the color change have similar colors, it is possible to easily and surely make the variable pattern almost invisible with the variable pattern.
[0017]
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. The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.
[0018]
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 elongated shape that reaches the rear waist portion 7 through the rear waist portion 7. 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.
[0019]
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.
[0020]
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 line 14a is displayed.
[0021]
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 according to the physique and body type of the wearer using the mark line 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.
[0022]
In the disposable diaper 1 having such an overall configuration, a pattern 15 for notifying urination is provided at the front of the crotch portion 6, as shown in FIG. Of course, a plurality of patterns 15 may be provided at appropriate intervals from the front waist portion 5 to the rear waist portion 7. As shown in FIG. 3, the pattern 15 is formed by printing on the inner surface of the liquid impermeable sheet 2 a in contact with the absorber 4 of the outer sheet 2. Further, the pattern 15 is formed by printing with a water-insoluble ink, and does not change even when it comes into contact with moisture. The variable pattern 17 is formed by printing with a water-soluble ink that has a color that makes the pattern 16 almost invisible and that melts when contacted with moisture and changes so that the invariable pattern 16 can be seen.
[0023]
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, chromophthal yellow, chromophthal 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.
[0024]
In the present embodiment, as shown in FIG. 4B, the invariable pattern 16 is composed of a contour line and a line drawing pattern (“Kumasan” in the illustrated example) drawn inside as necessary. As shown in FIG. 4A, the variable pattern 17 is printed solid over the entire contour of the line drawing pattern. The color of the water-insoluble ink forming the invariable pattern 16 and the color of the water-soluble ink forming the variable pattern 17 are the same or similar colors, and the water-soluble ink forming the variable pattern 17 is Before melting and disappearing, as shown in FIGS. 2 and 4A, the invariable pattern 16 is invisible.
[0025]
According to the above configuration, in the state in which the disposable diaper 1 is worn and before urinating, the invariable pattern 16 and the variable pattern 17 have the same or similar colors as described above. As shown in FIG. 7, the invariable pattern 16 is almost invisible. On the other hand, when the water comes into contact with the variable pattern 17 by urination, the water-soluble ink dissolves in the water and the variable pattern 17 disappears, so that the invariable pattern 16 appears to clearly emerge as shown in FIG. Become like In addition, even though the variable pattern 17 formed of the water-soluble ink becomes thin and diffuses and disappears while bleeding, even if the disappeared portion becomes slightly dirty, the invariable pattern 16 that appears as a result is clear. Not only is the stain inconspicuous, but also a thin ground pattern, resulting in an aesthetically pleasing pattern. In particular, since the invariable pattern 16 is composed of a contour line and a line drawing pattern drawn inside as necessary, the invariable pattern 16 appears more clearly by being wetted by water and disappearing by urination, A strong image can be given to infants.
[0026]
In this way, if a pattern of a theme (a “Kumasan” pattern in the illustrated example) that interests an infant is formed as the invariable pattern 16, the disposable diaper 1 in which the invariable pattern 16 becomes visible by urination is shown. This allows the infant to easily understand the situation of urination, which is effective for toilet training for urinals to be performed on the toilet. Also, by talking about the invariable pattern 16 as a topic and talking with the infant in various ways, it can be used for intellectual training.
[0027]
Further, in the above-described configuration, the invariable pattern 16 and the variable pattern 17 can be simply printed on the inner surface of the outer sheet 2 by using the respective inks, so that it can be implemented simply and at low cost.
[0028]
Further, in the above-described configuration, the color of the water-insoluble ink of the invariable pattern 16 and the color of the water-soluble ink of the variable pattern 17 are the same or similar colors, so that the invariable pattern 16 Are almost invisible, but do not necessarily have to be of the same color. For example, even if the invariable pattern 16 is formed of a light-colored transparent ink and the variable pattern 17 is formed of a dark-colored ink, printing is performed in an overlapping manner. Thus, the invariable pattern 16 can be made invisible. For example, by making the ink that disappears blue and the ink that does not disappear pink differently, when not in contact with moisture, pink is not visible at all, but when the blue dye melts and flows in water, it becomes pink ( Pigment).
[0029]
In the above configuration, the invariable pattern 16 is composed of an outline and, if necessary, a line drawing pattern drawn inside the variable pattern 17, and the variable pattern 17 is an example in which the entire area within the outline is printed. As shown in FIG. 5, the invariable pattern 16 may be a line drawing pattern, and the variable pattern 17 may be a solid printing pattern formed by overlapping a part of the line drawing pattern. In the example of FIG. 5A, the invariable pattern 16 is a line drawing pattern of “Tanuki-san”, and the variable pattern 17 is a solid print of a “blindfolded” hand shape. As shown in b), the variable pattern 17 disappears, and the entire line drawing pattern of “Tanukisan” appears, and the change in the pattern can be increased, thereby giving a stronger impression to the infant. it can.
[0030]
Also, in the description of the above embodiment, an example is shown in which the variable pattern 17 is formed by printing with a water-soluble ink that dissolves when it comes into contact with moisture, but reacts when the variable pattern 17 comes into contact with water or urine components to react with the other elements. It may be formed by printing with a color-changing ink that changes color or becomes transparent. As the discoloration ink, for example, an ink manufactured by Osaka Printing Ink Mfg. Co., Ltd. can be suitably used.
[0031]
As described above, when the variable pattern 17 is formed by printing with the discoloration ink that changes color in response to contact with water and urine components, the color of the variable pattern 17 changes due to the contact of the moisture and urine components with the discoloration ink due to urination. Thus, the invariable pattern 16 can be made to stand out more clearly, and the change in the pattern 15 can be made clearer, so that the impression on the infant can be further strengthened.
[0032]
【The invention's effect】
According to the disposable diaper of the present invention, an invariable pattern that does not change even when it comes into contact with moisture is formed on the inner surface of the outer sheet that is in contact with the absorber, and a part or all of the invariant pattern is overlaid on the invariable pattern and overlapped. The part has a color that makes the invariable pattern almost invisible and also forms a variable pattern that changes so that the invariable pattern is visible when it comes into contact with moisture. When the water is invisible and the moisture contacts the variable pattern due to urination, the variable pattern changes and the invariable pattern becomes visible. By showing the disposable diaper after urination, it is possible to easily understand the situation of urination, and it is also possible to use the pattern as a topic to talk with the infant and use it for educational purposes. Since it is simply to print overlapping invariant pattern and a variable pattern with each of the ink on the inner surface of the sheet can be carried out in simple and low-cost.
[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.
5A and 5B show another example of the pattern in the embodiment, wherein FIG. 5A is a front view before urination and FIG. 5B is a front view after urination.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Outer sheet 3 Inner sheet 4 Absorber 15 Pattern 16 Invariable pattern 17 Variable pattern

Claims (6)

In a disposable diaper in which an absorber is interposed between a liquid-permeable inner sheet and a liquid-impermeable, translucent outer sheet, the inner surface of the outer sheet in contact with the absorber does not change even when it comes into contact with moisture. A variable pattern that forms an invariable pattern, has a color that partially or entirely overlaps the invariant pattern, has a color that makes the invariable pattern almost invisible at the overlapping portion, and changes so that the invariable pattern can be seen when contacted with moisture. Disposable diapers characterized by being formed. 2. The disposable diaper according to claim 1, wherein the invariable pattern is formed by printing with a water-insoluble ink, and the variable pattern is formed by printing with a water-soluble ink which melts out upon contact with moisture. 2. The disposable diaper according to claim 1, wherein the invariable pattern is formed by printing with a water-insoluble ink, and the variable pattern is formed by printing with a color-changing ink that changes color upon contact with water or urine components. The invariable pattern comprises a contour line and a line drawing pattern drawn inside the contour line as required, and the variable pattern is printed solid on the entire surface of the contour line. Disposable diapers. The disposable diaper according to any one of claims 1 to 3, wherein the invariable pattern comprises a line drawing pattern, and the variable pattern is a solid print pattern formed so as to overlap a part of the line drawing pattern. The disposable diaper according to any one of claims 2 to 5, wherein the color of the water-insoluble ink and the color of the water-soluble ink or the discolored ink before discoloration are similar colors.

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