JP4317072B2 - Disposable diapers - Google Patents

Description

The present invention is an infant, related to one disposable Om intended for incontinent persons and the like, to a disposable diaper which can be informed that the particular voiding.

Oite into one disposable Om flat type or pants-type, as means for notifying that the urination while worn, the inner surface of the outer sheet of a disposable diaper, as well as printing the pattern set of alphabet blocks interspersed, each The outer border of the block is printed using ink that does not melt even when wet, and the letters on the alphabet on the block are printed with water-soluble or water-dispersible ink. There is known a technique in which urination is notified by the disappearance of the characters (for example, see Patent Document 1).

  The configuration of this type of disposable diaper will be described with reference to FIG. 10A. A liquid-impermeable outer sheet 33 comprising a milky white waterproof sheet 31 and a back sheet 32 such as a nonwoven fabric bonded to the outside thereof. And a liquid-permeable inner surface sheet 34 made of a nonwoven fabric or the like, and an absorbent body 35 is disposed on the inner surface of the waterproof sheet 31 that contacts the absorber 35, and is printed with water-insoluble ink. An invariant pattern 36 and a variable pattern 37 printed with water-soluble ink are formed. Then, the water-soluble ink is diffused by urination, so that the variable pattern 37 is erased by printing with the water-soluble ink.

  In addition, it is also known that when printing ink mixed with dyes and pigments of different colors and urinating, the dye ink diffuses and only the color of the remaining pigment ink is visible and shown to change color. Yes.

  Further, there is also known a method using a hot melt that changes color due to pH of urine instead of diffusing ink by urination.

In addition, it is also known that ink is printed on paper on which the ink is set off and the ink is set off by urination so that the ink can be seen from the outer sheet.
U.S. Pat. No. 4,222,211

  However, in the configuration shown in FIG. 10A disclosed in Patent Document 1, a variable pattern 37 such as alphabet letters wetted by urination is formed in FIG. 10B due to diffusion of water-soluble ink. Although it disappears as shown, even though it disappears, there is actually a problem that it looks bad because it is thinned and diffused by spreading when it is printed with water-soluble ink, and ink is used Therefore, there is a problem of fading with ultraviolet rays.

  In addition, even if the color is changed using ink mixed with dye and pigment, it may be discolored or faded before use due to ultraviolet rays or moisture, and if the color before discoloration is forgotten even if it changes color due to urination Has a problem that it is difficult to judge whether or not to urinate.

  Also, those using hot melt that changes color due to PH may not be discolored due to ultraviolet rays or the like, and even if the color before discoloration is forgotten even if it changes color due to urination, it will be left to the judgment of the presence or absence of urination There is a problem.

  In addition, the paper using the set-up paper has a problem that the paper is hard and disturbs the softness of the whole diaper, and also has a problem that it can be seen through the paper even before use.

In view of the above-described conventional problems, an object of the present invention is to provide a disposable diaper in which urination can be surely known by the appearance of color when urinating and can maintain softness. .

Disposable diaper of the present invention, the liquid in the disposable diaper made by interposing an absorber between the permeable top sheet and the waterproof sheet, laminating a colored powder containing sheet and a hydrophilic inner sheets impregnated with dried color powder A package comprising a water repellent sheet having an opening or a hydrophilic exterior sheet disposed on one side of the color powder-containing sheet, and the surface of the color powder-containing sheet side on the absorber side. The hydrophilic inner sheet side surface is directed to the waterproof sheet side, and is disposed at a portion facing the urination port between the absorber and the waterproof sheet, and the colored powder-containing sheet is the opening. Or through the hydrophilic exterior sheet .

According to this structure, when the absorbent body is urinated and the absorbent body gets wet with urine, the colored powder diffuses into the hydrophilic inner sheet together with the moisture, and the color of the colored powder diffused into the hydrophilic inner sheet from the outside of the waterproof sheet. look for, double waterproof sheet is colorless urination by varying the color can reliably know from, also color powder can reliably know the urination because there can degrade the like by ultraviolet rays and moisture, or Since there is no need to perform printing consisting of several steps, the manufacturing process can be simplified.

Further, a packaging body comprising a water-repellent sheet containing a colored powder-containing sheet and a hydrophilic inner sheet in a laminated form and having an opening or a hydrophilic exterior sheet disposed on one side, the absorbent body and the waterproof sheet Since it is disposed at a portion facing the urination port between the urine, a necessary portion is colored so that urination can be surely notified and materials can be saved.

In the above invention, to the package may be formed in a box shape, one surface of the hydrophilic sheet may be configured to another surface was adhered such a structure to heat seal the periphery at the water repellent sheet .

According to the disposable diaper of the present invention, when the urine is urinated, the colored powder diffuses into the hydrophilic inner sheet together with its moisture, and the waterproof sheet changes from colorless to colored as seen from the outside of the waterproof sheet, and the colored powder is ultraviolet rays. and the like in can reliably know the urination because it not degraded moisture, it is not necessary to perform or printing, effects such as can be simplified the manufacturing process can be exhibited.

Hereinafter, a reference example and an embodiment of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

(First reference example )
First, the underpants type disposable diaper of the 1st reference example is demonstrated with reference to FIG. 1, FIG. FIG. 1 shows the overall configuration of a pants-type disposable diaper 1. FIG. 1 (a) is a plan view of the diaper 1 in an unfolded state, FIG. 1 (b) is a partially enlarged sectional view, and FIG. is there.

In FIG. 1, a diaper 1 includes an absorbent main body 5 mainly composed of a liquid-permeable top sheet 2, a waterproof sheet 3, and an absorbent body 4 interposed between the top sheet 2 and the waterproof sheet 3. And a back sheet 6 made of a two-layered nonwoven fabric or the like is integrally bonded to the outer surface of the absorbent main body 5 on the waterproof sheet 3 side. The absorber 4 is configured by combining a pulp material such as flap-like wood pulp and cotton-like pulp and a polymer absorbent (SAP), and is configured by covering the outer surface with upper and lower crepe paper. Moreover, in the absorptive main body 5 of the present reference example , a second sheet 7 is interposed between the top sheet 2 and the absorbent body 4 to diffuse the urine urinated throughout the absorbent body 4 and prevent reversal. .

  The absorbent main body 5 is formed in an hourglass shape together with the internal absorbent body 4, and the back sheet 6 is formed in a shape slightly larger than that, and the front and rear direction (longitudinal direction) of the absorbent main body 5 and the back sheet 6. The leg-hole part 8 is comprised in the turning part of the center part both sides of (direction). Further, both end portions in the front-rear direction of the back seat 6 are folded inward to form a waist part 9a on the abdomen side and a waist part 9b on the back side, and between the waist parts 9a, 9b and the leg part 8 A side part 10a on the abdomen side and a side part 10b on the back side are formed on both sides of the absorbent main body 5.

  On both sides of the top sheet 2 of the absorbent main body 5, there are provided three-dimensional gathers 11 that prevent leakage of excrement such as urine and feces over both the waist portions 9a and 9b along the longitudinal direction. The three-dimensional gather 11 is welded to the top sheet 2 in a state of being folded back in a cross-sectional shape so as to smoothly follow the shift of the diaper 1 in a worn state, and its width direction A plurality of elastic elastic members 12 are arranged at appropriate intervals.

  And the welding edge parts 13a and 13b are formed in the side edge part of the waist part 9a and the side part 10a of the abdomen side, and the side edge part of the waist part 9b and the side part 10b of the back part side, respectively, These welding edge parts 13a , 13b are overlapped and welded together to form a pants shape. Further, a plurality of elastic elastic members (not shown) such as rubber thread and elastic film are disposed on the waist portions 9a and 9b on the abdomen side and the back side, respectively. Sometimes configured to tighten the barrel. Note that elastic stretch members (not shown) are also provided on the side portions 10a and 10b as necessary.

  In the diaper 1 having such an overall configuration, as shown in FIG. 1 (b), a sheet 14 containing dried colored powder is provided between the absorbent body 4 of the absorbent main body 5 and the waterproof sheet 3. A hydrophilic sheet 15 is disposed between the waterproof sheet 3 and the sheet 14 disposed in contact with the color powder 4.

The sheet 14 containing the colored powder is obtained by supporting the colored powder on a sheet having water absorbability or non-water-degradable paper or a non-woven fabric such as spunbond, air-through, point bond, and spunlace. Can be created. As the colored powder, blue, light blue, green, which reflects visible light having a wavelength of 380 to 770 nm and a frequency of 7.0 × 10 ^{14 to} 3.9 × 10 ¹⁴ Hz, and preferably gives a clean feeling to the wearer. Those exhibiting a color such as yellowish green are desirable. Moreover, you may mix the microcapsule which included fragrance in colored powder. Further, as a method for supporting the color powder on the sheet, gravure printing, a method of immersing the sheet in a liquid in which the color powder is dissolved, a color soaking in the sheet, and drying are preferable.

  According to the diaper 1 having the above configuration, before urination, as shown in FIG. 2A, the absorbent body 4 is not wet and the colored powder does not diffuse from the sheet 14 containing the colored powder. Since the waterproof sheet 3 and the hydrophilic sheet 15 are interposed from the outside of the sheet 3, the color of the sheet 14 including the colored powder is almost invisible. After urination, as shown in FIG. 2 (b), the absorbent body 4 gets wet with urine, and the water enters the sheet 14 containing the colored powder, and further leaches out into the hydrophilic sheet 15, thereby the water content. The color powder diffuses into the hydrophilic sheet 15 together, and the color of the color powder diffused into the hydrophilic sheet 15 becomes visible from the outside through the waterproof sheet 3. Thus, urination can be surely recognized by the change of the waterproof sheet 3 from colorless to colored.

  In addition, since colored powder does not deteriorate due to ultraviolet rays or moisture, urination can be known with certainty. Moreover, since only the sheet | seat which consists of two sheets of nonwoven fabrics, such as the sheet | seat 14 and the hydrophilic sheet | seat 15 containing the color powder, is additionally interposed, the softness requested | required of the diaper 1 can also be maintained. Furthermore, since the sheet 14 containing colored powder does not need to be printed through many printing processes, the manufacturing process can be simplified.

(First Embodiment)
Next, a first embodiment of the present invention will be described with reference to FIG. In the following description of the embodiment, description of the same components as those in the first reference example will be omitted, and only differences that are the features of the present embodiment will be described.

In the present embodiment, as shown in FIG. 3, a water repellent nonwoven fabric in which an opening 18 is formed on one surface and a hydrophilic sheet (hydrophilic exterior sheet) such as a hydrophilic nonwoven fabric is disposed in the opening 18 as necessary. A water-repellent sheet 17 comprising a box-shaped package 16 containing a sheet (color powder-containing sheet) 14 containing a colored powder and a hydrophilic sheet (hydrophilic inner sheet) 15. The package 16 is disposed in a portion of the absorbent main body 5 between the waterproof sheet 3 and the absorbent body 4 of the absorbent main body 5 that faces the urination port .

According to such a configuration, it is possible to inform reliably urination is colored at a main portion, and material can be saved.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, one surface is composed of a hydrophilic sheet (hydrophilic exterior sheet) 20 such as a hydrophilic non-woven fabric, the other surface is composed of a water-repellent sheet 21 such as a water-repellent non-woven fabric, and the peripheral portion 22 is bonded by heat sealing or the like. The package 19 is used.

According to such a configuration, by arranging the packaging body 19 in the urination port in the same manner as in the above-described embodiment, it is possible to reliably notify urination by coloring the required location and to save materials, And the package 19 is simple in structure and can be manufactured at low cost as compared with the case where the box-shaped package 16 is formed as in the above embodiment. However, when the peripheral edge 22 is bonded by heat sealing or the like, the texture may be lowered.

( Second reference example )
Next, a second reference example will be described with reference to FIG. The sheet 14 containing the color powder of this reference example is composed of a plurality of strip-shaped sheets 23 arranged in parallel. According to this configuration, since a striped pattern can be seen from the outside of the waterproof sheet during urination, attention can be easily drawn and urination can be notified with a stronger impression.

( Third reference example )
Next, a third reference example will be described with reference to FIG. The sheet 14 containing the color powder of this reference example is composed of a plurality of different-color strip sheets 24a to 24d containing different color powders. According to this configuration, since a stripe pattern with different colors can be seen from the outside of the waterproof sheet during urination, urination can be notified with a much stronger impression.

( Fourth reference example )
Next, a fourth reference example will be described with reference to FIG. In the sheet 14 containing the color powder of this reference example , a portion including the color powder is designed, and a design pattern 25 made of the color powder is provided. The design pattern 25 can be configured by partially subjecting the sheet to water-repellent treatment or embossing the sheet to form a concave portion for supporting colored powder. Also with this configuration, urination can be notified with a stronger impression.

( Fifth reference example )
Next, a fifth reference example will be described with reference to FIG. In this reference example , the waterproof sheet 3 itself or the sheet 26 interposed between the waterproof sheet 3 and the hydrophilic sheet 15 is formed of an opaque sheet such as white, and the hydrophilic sheet of the sheet 3 or 26 A transparent portion 27 having a design pattern is formed in a part of the portion facing 15. The transparent portion 27 can be easily formed by means such as applying heat to the sheet 3 or 26. According to this configuration, the colored design pattern can be seen through the transparent portion 27 of the design pattern from the outside of the waterproof sheet 3 during urination without having to bother designing the portion containing the color powder of the sheet 14 containing the color powder. Therefore, urination can be notified with an even stronger impression.

( Sixth reference example )
Next, a sixth reference example will be described with reference to FIG. In this reference example , the sheet 14 containing colored powder is configured to contain colored powder only on the side opposite to the absorber 4. Specifically, as shown in FIG. 9A, the color powder 30 is gravure-printed only on one side of the hydrophilic sheet material 28, or as shown in FIG. 9B, the liquid-impermeable film 29 and A sheet in which the hydrophilic sheet material 28 is laminated is used, and the hydrophilic sheet material 28 includes the color powder 30.

  According to this configuration, it is possible to suppress the color powder 30 from diffusing to the absorber 4 side during urination and causing the color to appear on the top sheet 2 side. In particular, the color powder having the configuration as shown in FIG. When the contained sheet 14 is used, after urination, urine diffuses from the periphery of the liquid-impermeable film 29 to the hydrophilic sheet material 28, and the colored powder 30 diffuses together with moisture to the hydrophilic sheet 15 to be waterproof. The liquid impervious film 29 can surely prevent the color powder from seeing from the outside of the sheet 3 and diffusing the colored powder to the absorber 4 side and producing the color on the top sheet 2 side.

When the above disposable diapers are urinated, the colored powder diffuses into the hydrophilic sheet together with its moisture and is visible from the outside of the waterproof sheet, the waterproof sheet changes from colorless to colored, and the colored powder deteriorates due to ultraviolet rays, moisture, etc. Because it does not, you can know urination reliably, and it is only necessary to add a sheet made up of two non-woven fabrics, such as a sheet containing colored powder and a hydrophilic sheet. Since the softness can be maintained, and further, it is not necessary to perform printing, the manufacturing process can be simplified. Therefore, it can be used for a disposable diaper for informing urination.

The diaper of the 1st reference example of the absorbent article which understands urination is shown, (a) is a top view of an unfolded state, and (b) is an AA arrow expanded sectional view of (a). The operation of the reference example is an explanatory diagram, (a) is a state explanatory diagram before urination, (b) is a state explanatory diagram after urination. It is a perspective view of the package arrange | positioned in the 1st Embodiment of this invention. It is sectional drawing of the package arrange | positioned in the 2nd Embodiment of this invention. It is a perspective view of the sheet | seat and the hydrophilic sheet | seat in which the color powder in the 2nd reference example was included. It is a perspective view of the sheet | seat and the hydrophilic sheet | seat in which the color powder in the 3rd reference example was included. It is a perspective view of the sheet | seat in which the color powder in the 4th reference example was included. It is a perspective view of the sheet | seat arrange | positioned on the outer side of the sheet | seat and the hydrophilic sheet | seat which contained the color powder in a 5th reference example . It is sectional drawing which shows the structural example of the sheet | seat in which the color powder in the 6th reference example was included. The disposable diaper of a prior art example is shown, (a) is sectional drawing of the principal part of the state before urination, (b) is sectional drawing of the principal part of the state after urination.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Diaper 2 Top sheet 3 Waterproof sheet 4 Absorbent body 14 Sheet | seat containing colored powder 15 Hydrophilic sheet 16 Packaging body 17 Water-repellent sheet 18 Opening 19 Packaging body 20 Hydrophilic sheet 21 Water-repellent sheet 22 Peripheral part 23 Strip-shaped sheet 24a-24d Different color strip-like sheet 25 Design pattern 27 Transparent part of design pattern 28 Hydrophilic sheet material 29 Liquid impermeable film 30 Color powder

Claims (3)

In a disposable diaper formed by interposing an absorbent body between a liquid-permeable top sheet and a waterproof sheet, a dry colored powder-containing sheet containing a colored powder and a hydrophilic inner sheet are housed in a laminated form inside, A package made of a water-repellent sheet having an opening or a hydrophilic exterior sheet disposed on one side of the color powder-containing sheet side, the surface on the color powder-containing sheet side on the absorber side, and the surface on the hydrophilic inner sheet side Is disposed at a portion facing the urination port between the absorber and the waterproof sheet, and the colored powder-containing sheet passes through the opening or is hydrophilic. A disposable diaper characterized in that it is configured to contact the absorber through an exterior sheet . The disposable diaper of claim 1, wherein the package is a box shape. Outer sheet of the package body, one surface hydrophilicity of the sheet, the other face consists of water-repellent sheet, a disposable diaper according to claim 1, wherein the peripheral edge portion thereof, characterized in that it is bonded.

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