JP3047219U - Disposable diapers - Google Patents

Abstract

(57) [Summary] [Problem] To use a flat rectangular disposable diaper inexpensively, which can use a simple rectangular absorber as it is conventionally and can prevent urine leakage from the side of the diaper as much as possible. To provide. A flat disposable diaper in which a liquid-permeable top sheet (3) is provided above a rectangular absorber (2) and a liquid-impermeable back sheet (1) is provided below the absorber (2). The side edge of the back sheet 1 in the width direction is folded over the absorber 2 and the top sheet 3 is placed on the folded piece 1a. A belt-shaped member 4 provided with the elastic member 5 is disposed along a longitudinal direction of the diaper, and the band-shaped member is provided on at least one of a top sheet and a back sheet folded piece while leaving a non-adhered area including the elastic body-added portion. By bonding
A disposable diaper characterized in that the non-adhered area of the band-shaped body is configured to stand up from the top sheet.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a pants-type disposable absorbent article and a flat-type disposable diaper to be used by being housed inside a diaper cover.

[0002]

[Prior art]

 In nursing care for bedridden elderly people and severely ill people, disposable diapers that can be formed and worn in pants-like form with fastening tape are used. However, disposable diapers are disposable once or twice. Discarding diapers is not preferable from the viewpoint of cost and resource saving. For this reason, by using inexpensive rectangular (flat) disposable diapers and auxiliary pads inside the pants-type disposable diaper or diaper cover, the cost of the diaper can be reduced, In order to reduce the number of disposable members, a device has been devised.

The flat-type disposable diaper and the auxiliary pad are mainly different only in size, and the flat-type disposable diaper has a relatively large length and width of about 75 cm × 33 cm. The length and width of the auxiliary pad are as small as about 30 cm × 15 cm.

By the way, a flat disposable diaper is formed in a simple rectangular shape by a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber, so that it can be provided at a low price with a reduced manufacturing cost. Has become. The absorber is formed mainly by piling crushed pulp fiber and superabsorbent resin powder and wrapping it with tissue or the like. A liquid-permeable nonwoven fabric such as polypropylene is used as the top sheet, and a liquid-impermeable sheet such as a polyethylene film is used as the backsheet. Then, the absorber is sandwiched between the top sheet and the back sheet, and the edges of the top sheet and the back sheet are joined by hot-melt adhesive or heat welding, and each layer is coated with the hot-melt adhesive applied in the form of dots or lines. Are intermittently joined.

When a flat disposable diaper having such a structure is used by attaching it to the inside of a pants-type disposable diaper or a diaper cover, the flat disposable diaper itself adheres to the wearer's skin. Since there is no function to remove urine, urine and loose stool may be generated from this flat disposable diaper without being absorbed by the absorber when urinating a large amount at once. However, it could not be caught by the outer diaper or diaper cover and leaked to the outside. This leakage often occurs especially around the legs.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 9-122176, a string-like or band-like elastic body (synthetic rubber or natural rubber, synthetic resin foam, etc.) is provided on the left and right sides and the front and rear ends of a flat disposable diaper. A stretchable gather is formed in these areas with the addition of a diaper, and a flat-type disposable diaper has been devised to have good adhesion to the skin. However, in order to provide elasticity on both sides of the diaper corresponding to the area around the wearer's leg, it is necessary to eliminate the absorber present at this part. Therefore, in order to maintain the absorption performance of the front and rear parts of the diaper, it is necessary to change the shape of the absorber from a rectangle to a roughly hourglass shape (a shape with a constricted central part), and the manufacturing equipment is strongly modified. This may increase costs.

[0007]

[Problems to be solved by the invention]

 Therefore, in the present invention, a flat rectangular disposable diaper that can prevent the leakage of urine from the side of the diaper as much as possible can be used as it is, as is the case with the conventional simple rectangular absorber. The task was to provide.

[0008]

[Means for Solving the Problems]

 The disposable diaper of the present invention is a flat disposable diaper in which a liquid-permeable top sheet is provided above a rectangular absorber and a liquid-impermeable back sheet is provided below the absorber. The side edge of the back sheet in the width direction is folded back to the upper side of the absorber, and the top sheet is overlapped on all or a part of the folded pieces. Is disposed along the longitudinal direction of the diaper, and the above-mentioned band is attached to at least one of the top sheet and the back sheet folded piece except for the non-adhered area including the elastic body attached portion. The gist lies in that the non-adhered area of the belt-shaped body is configured to be separated from the top sheet and to be raised by bonding.

[0009] Such a band-like body forms a stretchable gather and rises from the top sheet surface, so that pockets are formed on both sides of the diaper, and the diaper is worn by the wearer by the adhesive force of the gather portion. Because it is close to the leg around, it is possible to prevent lateral leakage of urine and loose stool. In addition, in order to provide the rising gathers in the diaper, it is only necessary to add a band-shaped attachment device to the conventional manufacturing apparatus, so that an increase in cost can be suppressed as much as possible. Furthermore, since the side edge of the back sheet is folded over the absorber, there is also a disadvantage that urine or the like once absorbed by the absorber leaks out from the side of the diaper and touches the thighs of the wearer. Can be prevented.

An elastic body is attached only to one side edge of the band-shaped body, and the other side edge and both ends in the longitudinal direction are bonded to the top sheet and the back sheet folded piece, or Elastic bodies are attached to both side edges of the body, and the central part of the strip is bonded to at least one of the top sheet and the back sheet folded piece. It is.

It is simplest to manufacture the diaper by forming the belt-shaped body from a separate nonwoven fabric or the like. However, the band-shaped body is a fold formed by folding the top sheet. It is also possible to adopt a configuration that is a fold formed by folding a folded piece of the back sheet folded above the absorber.

[0012]

[Embodiment of the invention]

 One example of the disposable diaper of the present invention will be described in detail with reference to FIGS. 1 is a partially broken plan view, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. The flat disposable diaper T is made of a plastic sheet, a non-woven fabric subjected to a water-repellent treatment, a liquid-impervious back sheet 1 made of a laminate of the non-woven fabric and the non-woven fabric, a mixture of pulp fibers and a superabsorbent resin powder (heat fusion (Which may contain conductive fibers) and a liquid-permeable topsheet 3 made of a nonwoven fabric made of synthetic fibers.

As shown in FIG. 2, in which the adhesive layers are omitted to clarify the laminated state and the layers are separated from each other, the left and right side edges of the back sheet 1 are covered with a top sheet so as to wrap the side of the absorber 2. The top sheet 3 is overlapped and adhered to the upper surface of the folded piece 1a. The top sheet 3 only needs to have both side edges overlapping a part of the folded back piece 1a of the back sheet, and does not necessarily have to have the same width as the diaper. As shown in FIG. 3 which is a cross-sectional view taken along the line BB in FIG. 1, the absorber 2 is not provided at the longitudinal end of the diaper T, and the back sheet 1 and the top sheet 3 are not provided. The absorber is sealed and adhered.

On the left and right sides of the top sheet 3, strips 4, 4 are provided. The band 4 is formed of a synthetic fiber spunband nonwoven fabric subjected to a water-repellent treatment, a nonwoven fabric laminate (such as an SMS nonwoven fabric in which a spunbond nonwoven fabric (S) and a meltblown nonwoven fabric (M) are laminated), and the like. A thread-like continuous elastic body (e.g., spandex thread) is attached to one side edge of the belt-shaped body 4. Note that elastic members are not attached to both ends in the longitudinal direction of the strip 4.

In the example shown in FIG. 2, a bag-like portion 4a is formed by folding a side edge of the band-like body, and a thread-like elastic body 5 is intermittently adhered to the inside of the bag-like portion 4a in a stretched state. The other side edge of the band 4 is bonded to both the top sheet 3 and the folded back sheet 1a. In addition, since elastic members are not attached to both ends in the longitudinal direction of the band 4, both ends are bonded to both the top sheet 3 and the folded back piece 1 a of the back sheet over the entire width of the band. Have been. That is, the belt-shaped body 4 illustrated in FIG. 2 is joined to the diaper by the substantially U-shaped adhesive area 6 as shown in FIG. In the central portion (the portion other than both end portions) of the band to which the elastic body is attached, only the side edges of the band are adhered. It rises at a distance from the top, forming rise gathers and forming pockets. Therefore, even if urine flows to both sides of the diaper, it is blocked by the pockets, and the absorbent rapidly absorbs the urine. In addition, the presence of the gathers improves the adherence of the wearer to the area around the leg, and this is also effective in preventing side leakage.

At this time, as shown in the perspective view of FIG. 5, it is preferable that the rising start point S of the rising gather is set near the edge 1 aE of the folded back piece of the back sheet 1. This is because, in order for the urine blocked by the pocket P to be absorbed by the absorber, it is better that the liquid-impermeable back sheet 1 is not provided immediately below the rising start point. Therefore, the center of the diaper in the bonding area 6 for bonding the belt-shaped body 4 is preferably up to the edge 1aE of the folded piece of the back sheet 1.

FIGS. 6 to 8 are cross-sectional explanatory views showing another example of the present invention and correspond to FIG. 2 described above. FIG. 6 shows an example in which one band-shaped body forms two rising gathers on each of the left and right sides of the diaper. Elastic bodies 5 and 5 are attached to both side edges of the band 4 in an extended state, respectively, and the center of the band 4 is adhered to the top sheet 3 to form the first rising gather 41 and the first rising gather 41. A second rising gather 42 is formed. The present invention is not limited to this example. The first and second rising gathers may be formed by using two separate strips, or three or more rising gathers may be provided. It does not matter. FIG. 6 shows an example in which the rising height of the first rising gathers 41 (the distance from the top sheet) is lower than the rising height of the second rising gathers 42. May have any of the opposite height configurations.

The example shown in FIG. 7 has a configuration in which the top sheet 3 is extended in a wide width to form a fold, instead of adding a separate nonwoven fabric as a band, and substitutes for the band. . That is, the left and right sides of the top sheet 3 are folded back to form folds, thereby forming folds 34, 34 on the left and right, respectively. This is the rising gather. It should be noted that a rising gather can be formed by forming a fold on the folded piece 1a of the back sheet 1 instead of the fold 34 formed of the top sheet 3.

The example shown in FIG. 8 is a modified example of the rising gather shown in FIG. 2, in which the other side edge where the elastic yarn 5 is not attached is placed closer to the center of the diaper than the end edge of the folded back piece 1a of the back sheet. It is a configuration bonded to the side. In this configuration, the strip 4 is in contact with only the top sheet 3. When the band 4 is bonded to the top sheet 3 with, for example, a hot-melt adhesive, it is recommended to use a continuous linear shape in the longitudinal direction of the diaper and an intermittent adhesive pattern in the diaper width direction. Is done. This is because it becomes difficult for urine and the like to pass in the width direction. This adhesive application pattern can be adopted in any of the above-mentioned examples of the present invention.

[0020]

【Example】

 A comparison experiment was conducted between the flat disposable diaper of the present invention and a conventional flat disposable diaper having no rising gathers, in terms of urine absorption performance and occurrence of side leakage.

A flat disposable diaper is disposed inside a transparent plastic film diaper cover having a fastening tape, and an auxiliary pad having a size of 20 cm × 50 cm is provided inside the disposable diaper. , Attached to the crotch of the phantom. An opening of a pipe is arranged at the crotch portion of the phantom, and colored physiological saline (having a salt concentration of 1% by weight) can be poured from the other end of the pipe. Using this pipe, physiological saline is supplied to the diaper at a rate of 7.5 cc / sec. When the physiological saline leaks from the flat-type disposable diaper, the water supply is stopped and the amount of water supplied up to that point Was measured. The average value of the amount of water supplied 10 times each was 450 cc for the product of the present invention and 325 cc for the conventional product.

[0022]

[Effect of the invention]

 Since the flat disposable diaper of the present invention is configured as described above, it is possible to prevent urine and loose stool from leaking sideways in the width direction of the diaper due to rising gathers which are closely attached around the wearer's legs. In addition, when the band for the rising gathers is added, it is only necessary to add an additional device for the band to the conventional manufacturing apparatus, so that the cost rise can be suppressed as much as possible. Furthermore, since the side edge of the backsheet is folded over the absorbent, it is possible to prevent inconvenience that urine etc. once absorbed by the absorbent oozes out from the diaper side and touches the thighs of the wearer. I can now do it.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view showing an example of a flat disposable diaper of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an explanatory plan view showing an adhesion area of the belt-shaped body.

FIG. 5 is a partial perspective explanatory view of the upper left portion of the disposable diaper shown in FIG.

FIG. 6 is an explanatory cross-sectional view corresponding to FIG. 2, showing another example of the present invention.

FIG. 7 is an explanatory cross-sectional view of another example of the present invention, corresponding to FIG. 2;

FIG. 8 is an explanatory cross-sectional view corresponding to FIG. 2, showing another example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Back sheet 1a Folded piece 1aE Folded one edge 2 Absorber 3 Top sheet 4 Belt 5 Elastic body 6 Adhesive area P Pocket part S Start-up point T Flat disposable diaper

Claims (5)

[Utility model registration claims] 1. A flat disposable diaper having a liquid-permeable top sheet provided on an upper side of a rectangular absorber and a liquid-impermeable back sheet provided on a lower side of the absorber. The width side edge of the sheet is folded over the absorber, and the top sheet is overlaid on all or a part of the folded pieces. A continuous elastic body is attached to the left and right sides of the diaper along the side edge. By disposing the provided band along the longitudinal direction of the diaper, and bonding the band to at least one of the top sheet and the back sheet folded piece except for the non-adhered area including the elastic body attached portion. A disposable diaper characterized in that the non-adhesive area of the band is raised so as to be spaced from the top sheet. 2. An elastic body is attached to only one side edge of the belt-shaped body, and the other side edge and both ends in the longitudinal direction are bonded to the top sheet and the back sheet folded piece. The disposable diaper according to claim 1. 3. An elastic body is attached to both side edges of the band, and a central portion of the band is adhered to at least one of the top sheet and the folded back sheet. The disposable diaper described in. 4. The disposable diaper according to claim 1, wherein the band-shaped body is a fold formed by folding a top sheet. 5. The disposable diaper according to claim 1, wherein the band-shaped body is a fold formed by folding a folded piece of the back sheet folded over the absorber.