JP4773310B2 - Disposable paper diapers - Google Patents

Description

  The present invention relates to a disposable paper diaper with a so-called notification function that can know the excretion.

As this kind of disposable paper diaper, what contains hydrolase and the fragrance | flavor precursor substance which decomposes | disassembles by the effect | action of a hydrolase and becomes a fragrance | flavor is known (for example, refer patent document 1). . However, since the fragrance has the property of being dispersed in the air, it is uncertain to know the excretion. Therefore, a paper diaper developed for the purpose of health management and containing a reaction reagent that exhibits a color reaction according to the components in the body fluid and has a high light transmittance (see, for example, Patent Document 2). ) Can be used as a disposable diaper that can know the excretion. According to this form, since excretion can be known by discoloration and it does not disappear with time like a fragrance | flavor, certainty increases in knowing excretion.
However, according to the paper diaper of Patent Document 2, when the wearer is healthy and the concentration of a component such as glucose in the body fluid is low or the body fluid is small, discoloration does not occur and the excretion cannot be known. Patent Document 2 is intended for health management and still has no problem, but it is a problem to make a disposable diaper that can know the excretion.
JP-A-8-126661 JP 2005-152264 A

  The main problem to be solved by the present invention is to provide a disposable paper diaper that can reliably know excretion.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A disposable paper diaper in which a body fluid permeable top sheet, a body fluid absorber, and a body fluid impermeable back sheet are laminated in this order,
The backsheet is light transmissive;
On the skin side of the back sheet, a first enzyme that causes a reaction to generate hydrogen peroxide from glucose, an oxidizable dye that changes color when oxidized, and the oxidizable dye are oxidized by the hydrogen peroxide. A second enzyme that allows the reaction to proceed is added,
As a raw material from which glucose is produced upon contact with glucose or / and body fluid, an oblate containing starch as a main component is provided, and a third enzyme that promotes a reaction for producing glucose from the starch is provided. Disposable disposable diapers characterized by

  According to this invention, it becomes a disposable paper diaper which can know excretion reliably.

  Next, an embodiment of the present invention will be described. In addition, the disposable paper diaper of this invention is applicable also to a pants-type disposable paper diaper etc. other than a tape-type disposable paper diaper. Hereinafter, a tape-type disposable paper diaper will be described as an example.

  1 and 2 show a tape-type disposable paper diaper 10 according to this embodiment. The paper diaper 10 of this embodiment is a body fluid-permeable top sheet 1 having a rectangular shape such as a nonwoven fabric or a porous film, an hourglass shape, etc., and a second fabric comprising a nonwoven fabric appropriately provided to improve body fluid dispersibility. The sheet 6 is made of a cotton-like pulp to which a polymer absorbent polymer 4, 4... Is added, and has a certain degree of rigidity, such as a rectangular shape or an hourglass shape. A body fluid-impermeable back sheet 2 made up of a body fluid absorber 3, a polyethylene sheet, a polylaminated nonwoven fabric, a microvoid, and a vapor that permeates but does not permeate the liquid, is laminated in this order.

  The bodily fluid absorber 3 is disposed at a substantially central portion of the paper diaper 10. The body fluid absorber 3 is covered with a covering sheet 3A made of tissue paper, crepe paper, or the like, so that the shape is maintained.

  Although not illustrated in the present embodiment, an outer sheet having a rectangular shape or an hourglass shape can be provided on the back surface side of the back sheet 2. The outer shape sheet defines the product shape over the entire outer surface of the paper diaper 10, and is formed of a continuous sheet. The outer shape sheet preferably has air permeability even though it has body fluid impermeability (water repellency) from the viewpoint of preventing stuffiness. Further, the material of the outer sheet can be selected as appropriate. Specifically, for example, heat-sealed, ultrasonically bonded, hot-bonded with a rayon spunlace nonwoven fabric blended with polypropylene-based heat fusion fibers and rayon fibers, and a melt blown nonwoven fabric mainly composed of urethane or isoprene rubber-based materials An example can be illustrated that is integrated by bonding with an adhesive such as a melt. In the case of using this material, it is preferable that the former nonwoven fabric (rayon spunlace nonwoven fabric) be on the wearer's skin side. In this embodiment, since the back sheet 2 that is impermeable to bodily fluid is provided on the skin surface side of the external sheet, and the bodily fluid is prevented from falling through, the external sheet itself is permeable to bodily fluids. There may be. Reference numerals 9 and 9 are fastening tapes made of a fastening tape or the like.

  At least one of the front and rear end portions of the paper diaper 10 constituted by the front and rear end portions of the top sheet 1 and the back sheet 2, in the illustrated example, the flap portion of the rear (back side) end portion is provided with a belt-like rubber or thread-like shape. The elastic elastic members 31, 31... Made of rubber or the like are fixed under extension to form a cylindrical elastic part 30 that expands and contracts in the width direction. The elastic elastic members 31, 31... For waistline can be provided with one or a plurality of parallel members between the sheets 1 and 2, for example. In use, the waist elastic part 30 is pulled sideways as the fastening tapes 9, 9 are pulled sideways, and fits the wearer's body.

  On the front / rear end (flap) surface (skin side) of the top sheet 1, a front / rear flap sheet (not shown) that is impermeable to body fluid or impermeable to body fluid but is air permeable but not breathable. You can also. In the front and rear flap sheets, the base end portions (the front and rear end portions of the paper diaper 10) are fixed to the surface of the top sheet 1 with an adhesive such as hot melt. On the other hand, the front end portion (end portion on the crotch portion side) of the front and rear flap sheets is an upright portion that is not fixed to the top sheet 1 surface. An elastic elastic member made of a band-like rubber or a thread-like rubber is fixed to the tip of the standing part with an adhesive such as hot melt under expansion. Therefore, in the state of use, the standing portion rises from the surface of the top sheet 1 due to the contraction of the elastic elastic member, and body fluid is prevented from leaking back and forth. The front and rear flap sheets are not provided on both the front and rear end portions of the top sheet 1 but may be provided on one side. Of course, in this embodiment, it can be omitted.

  On the other hand, in this embodiment, on the side end surface (skin side surface) of the top sheet 1, standing gathers or the like called barrier cuffs or three-dimensional gathers can be provided as side leakage preventing means. In the standing gather, the base end portion (the end portion on the side of the disposable diaper 10) is fixed to the surface of the top sheet 1, and the boundary between the fixing portion and the unfixed rising portion is the rising start point, that is, the proximal portion of the rising portion. Become an edge. Moreover, it is preferable that the standing gathers have a laminated structure in which a lower standing sheet, an impermeable layer, and an upper standing sheet are laminated in this order. According to this form, the seepage that permeates the standing gathers is completely prevented, and the touch does not deteriorate. Moreover, when it is set as a laminated structure, not only leak-proof property will increase, but the shape retention property as a standing gather will become favorable especially, and it will not produce a dripping etc. during wear, and it will become a thing with a higher leak prevention effect. In the standing gathers, one or a plurality of elastic elastic members made of band-like rubber or thread-like rubber are fixed near the tip edge (distal edge) with an adhesive such as hot melt under extension. The standing gathers stand by contraction of the elastic elastic member, and the vicinity of the tip edge comes into contact with the wearer's leg. A pocket space for confining body fluids such as urine and soft stool is formed by a substantially trapezoidal space with an upper opening surrounded by the standing gathers and the top sheet 1. When body fluids such as urine and loose stool are excreted in this pocket space, mainly liquids such as urine pass through the top sheet 1 and are absorbed into the body fluid absorber 3, while solids such as loose stool are Standing gathers become barriers and prevent overcoming them.

  The upright sheet can be formed of a substantially breathable material such as a water-repellent nonwoven fabric or a fine vented flexible film for ventilation. In addition, when the standing gather has a laminated structure, there is no particular limitation on how to make the laminated structure. For example, a continuous upright sheet is folded back across an impermeable layer, and from this folded edge, one is a lower layer upright sheet and the other is an upper layer upright sheet, or a plurality of upright sheets are impervious. A laminated structure can be obtained by, for example, overlapping with a liquid layer interposed therebetween. On the other hand, how to form the liquid-impermeable layer interposed between the standing sheets is not particularly limited. For example, a film sheet is laminated on an upright sheet, and the laminated film sheet is made to be a liquid-impermeable layer, or the upright sheet is applied by applying an adhesive such as hot melt, and then applied. A layer formed by solidifying an adhesive such as hot melt can be made to be a liquid-impermeable layer. The coating of the adhesive such as hot melt is preferably performed by spiral coating, more preferably by curtain coating, and particularly preferably by solid coating.

  In this embodiment, a flap portion is constituted by the top sheet 1 and the back sheet 2 on the side of the body fluid absorber 3. Between the top sheet 1 and the back sheet 2 of the flap portion, there are one or a plurality of elastic elastic members 21, 21,... For leg rotation in the illustrated example. Is formed by a pleated leg-shaped stretchable part 20 that is stretched in the front-rear direction by the stretching force of the leg-stretching elastic stretchable members 21, 21. The leg-surrounding stretchable part 20 is located at the side end of the paper diaper 10 and is generally called a planar gather, a gasket cuff, or the like. The leg elastic elastic members 21, 21... Can be provided not between the top sheet 1 and the back sheet 2 but between the back sheet 2 and the outer sheet (not shown). If the leg-surrounding stretchable part 20 is formed, even if the body fluid gets over the standing gathers or the like, the leg-surrounding stretchable part 20 prevents side leakage.

  By the way, in the case where the leg elastic part 20 is formed as described above, and as described above, the standing gather is constructed such that the elastic elastic member is fixed to the tip part while being stretched, and stands up. The difference between the expansion rate of the elastic elastic member of the gather and the expansion rate of the elastic elastic member 21 of the leg-surrounding stretchable portion 20 is reduced, and the stretch rate of the elastic elastic member of the standing gather is the elastic stretchable member 21 of the leg-surrounding stretchable portion 20. It is better to make it equal to or slightly higher than the stretch rate of. Specifically, the stretch ratio of the elastic stretch member of the standing gathers / the stretch ratio of the elastic stretch member 21 of the leg-hole stretch section 20 (hereinafter also referred to as “stretch ratio”) is set to 1.0 to 1.2. It is preferable that it is 1.0 to 1.1. When the stretch ratio is less than 1.0, the leg-growth stretchable part 20 is covered with the standing gathers, and the standing gathers get worse. On the other hand, when the stretch ratio is higher than 1.2, the standing gathers strongly presses the skin and marks the skin. At this time, the stretch rate of the elastic elastic member of the standing gather is 230 to 280%, preferably 250 to 260%, and the stretch rate of the elastic stretch member 21 of the leg-hole stretchable part 20 is 220 to 260%, preferably 235 to 245%, rate of expansion of elastic elastic member of standing gathers--the rate of expansion of elastic elastic member 21 of leg elastic part 20 is 0 to 40%, preferably 10 to 20%. The stretch rate (%) of the elastic stretchable member means “length of elastic stretchable member in a stretched state / length of elastic stretchable member in a stretched state (free state) × 100”. To do.

Further, in the present embodiment, the back sheet 2 is light-transmitting, and a reaction (glucose + (in the air) oxygen) in which hydrogen peroxide is generated from glucose on the skin surface side of the back sheet 2 → First enzyme C1 such as glucose oxidase (GOD) that promotes gluconic acid + hydrogen peroxide (H ₂ O ₂ ), o-tolidine, 2,7-diaminofluorene, o-dianisidine, leu An oxidizable dye D1 such as consodophenol, and a peroxidase that promotes a reaction (hydrogen peroxide + oxidizable dye → oxidized dye + H ₂ O) in which the oxidizable dye D1 is oxidized by the hydrogen peroxide. A second enzyme C2 such as POD) is provided. Therefore, the oxidizable dye D1 changes color due to glucose contained in body fluid such as urine. And since the back sheet 2 is made light transmissive, this discoloration can be visually recognized even in a paper diaper wearing state, and excretion can be known.

  Here, the entire surface of the back sheet 2 does not need to be light transmissive, and it is sufficient if the back sheet 2 is light transmissive as long as the discoloration of the oxidizable dye D1 can be visually recognized. On the other hand, when an outer sheet or the like is provided on the back surface side of the back sheet 2, the outer sheet or the like needs to be light transmissive as long as the discoloration of the oxidizable dye D <b> 1 can be visually recognized.

  In this embodiment, the light transmittance of the back sheet 2 or the like is preferably 40% or more, more preferably 60% or more, based on JIS K 7105. If the light transmittance is less than 40%, it is difficult to visually recognize the discoloration of the oxidizable dye D1.

By the way, when the enzyme C1, C2 and the oxidizable dye D1 are simply given to the paper diaper 10, the discoloration of the oxidizable dye D1 becomes weak when the concentration of glucose contained in the body fluid is low. . Therefore, in the present embodiment, in advance, even raw materials glucose is produced with the contact with body fluid (glucose generated raw), granted to the disposable diaper 10. Thereby, since the density | concentration of glucose becomes high, the discoloration of the oxidizable dye D1 becomes strong. Therefore, the discoloration of the oxidizable dye D1 can be surely visually recognized, and the excretion can be surely known.

The paper diaper 10, just when to be imparted glucose, the glucose-glucose oxidase and placed in contact with the enzyme C1, C2 and the oxidizable dye D1 such as peroxidase, cause discoloration of the oxidizable dye D1 Therefore, both cannot be kept in contact with each other. Therefore, it is necessary to make contact using the flow of body fluid, and a certain amount of body fluid is required. That is, if the body fluid is discharged in a very small amount, it may not be possible to know the excretion. Therefore, in the present embodiment, as a glucose production raw material, for example, a sheet-like wafer 5 having starch as a main component is provided, and a third enzyme C3 such as an amylase that promotes a reaction for producing glucose from the starch is provided. Has been granted. Therefore, glucose is generated due to body fluids such as urine coming into contact with the wafer 5 and dissolving the wafer 5 as starch. Oblate 5 is naturally composed of starch, not glucose, so that even when it is brought into contact with enzymes C1 and C2 such as glucose oxidase and peroxidase and oxidizable dye D1, the color change of oxidizable dye D1 is not caused. There is no risk. As a result, in the present embodiment using the wafer 5, it is possible to cause the discoloration of the oxidizable dye D1 with an extremely small amount of body fluid, and it is possible to know the excretion with certainty.

  Here, in this embodiment, the application positions and application methods of the various enzymes C1 to C3 and the oxidizable dye D1 are not particularly limited. For example, as shown in FIG. 2, the oblate 5 containing the third enzyme C3, the first and second enzymes C1 and C2, and the oxidizable dye D1 are formed on the back surface side of the absorber 3 from the skin surface side. Can be given in this order. Moreover, this form can be changed as appropriate. For example, as shown in FIG. 3, in addition to the third enzyme C3, the first and second enzymes C1 and C2 can be contained in the wafer 5. In this case, in the illustrated example, the wafer 5 is disposed at the end on the back surface side in the cover sheet 3 </ b> A, but may be disposed between the cover sheet 3 </ b> A and the back sheet 2. Further, as shown in FIG. 4, the wafer 5 contains an oxidizable dye D1 and is arranged at the end on the back surface side in the cover sheet 3A as shown in the drawing, or the cover sheet 3A and the back sheet. 2 (not shown). In these forms, the position where the oxidizable dye D1 is applied can be devised so that the pattern emerges on the back side of the backsheet 2 as the oxidizable dye D1 changes color.

  On the other hand, examples of methods for applying the various enzymes C1 to C3 and the oxidizable dye D1 include a method of spraying as a powder, a method of applying ink to the back sheet 2, the covering sheet 3A, and the like. be able to. In order to make an ink, various chemicals and cellulose or a cellulose derivative are dispersed or dissolved in an organic solvent. Specifically, cellulose, cellulose derivatives such as varnish, hydroxypropylcellulose, and the like are added to various chemicals, and dispersed or dissolved in an organic solvent such as methanol, ethanol, toluene, or sodium hydroxide.

[Others]
(1) In this embodiment, each elastic elastic member may be made of natural rubber or synthetic rubber. Further, the number, thickness, shape and the like of the elastic elastic members are not particularly limited. It can also be fixed in a curved line or wavy line instead of a straight line.

(2) In the present embodiment, the form in which the waistline elastic part 30 and the body fluid absorber 3 are not overlapped is shown, but the present invention is not limited to this. The waist elastic part 30 and the body fluid absorber 3 may overlap. Further, while the waistline elastic part 30 and the body fluid absorber 3 are arranged so as to overlap with each other, it is possible to cut and remove the waistline elastic elastic members 31, 31.

(3) In the present embodiment, the shape of the fastening tape 9 is not particularly limited. For example, the fastening tape 9 may have a mountain shape obtained by cutting one sheet into a wavy line shape or a quadrangular shape. it can.

(4) The first and second enzymes C1 and C2 and the oxidizable dye D1 can be applied by coating or impregnating other sheets such as filter paper and crepe paper. At this time, the other sheet can be disposed at the end on the back surface side in the cover sheet 3A, or disposed between the back sheet 2 and the cover sheet 3A.

  The present invention can be applied as a disposable paper diaper with a so-called notification function that can know the excretion.

It is a top view of a disposable paper diaper. It is sectional drawing and the example of a disposable paper diaper. It is sectional drawing and the example of a disposable paper diaper. It is sectional drawing and the example of a disposable paper diaper.

  DESCRIPTION OF SYMBOLS 1 ... Top sheet, 2 ... Back sheet, 3 ... Body fluid absorber, 3A ... Cover sheet, 4 ... Superabsorbent polymer, 5 ... Oblate, C1-3 ... Enzyme, D1 ... Oxidizing dye.

Claims (1)

A disposable paper diaper in which a body fluid permeable top sheet, a body fluid absorber, and a body fluid impermeable back sheet are laminated in this order,
The backsheet is light transmissive;
On the skin side of the back sheet, a first enzyme that causes a reaction to generate hydrogen peroxide from glucose, an oxidizable dye that changes color when oxidized, and the oxidizable dye are oxidized by the hydrogen peroxide. A second enzyme that allows the reaction to proceed is added,
As a raw material from which glucose is produced upon contact with glucose or / and body fluid, an oblate containing starch as a main component is provided, and a third enzyme that promotes a reaction for producing glucose from the starch is provided. Disposable disposable diapers characterized by

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