JP4132465B2 - Disposable auxiliary pad - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable auxiliary pad that is attached to the inside of a wearing article such as a disposable diaper and absorbs urine, and particularly relates to a disposable auxiliary pad that hardly causes side leakage of urine from the wearing article.
[0002]
[Prior art]
The disposable auxiliary pad is attached to the wearer's surface (skin surface) of disposable diapers, disposable pants, or non-disposable incontinence pants that can be washed (hereinafter collectively referred to as wearing articles). If present, it is used to replace only the auxiliary pad and keep it clean at all times. This is because disposable products are expensive, it is uneconomical to replace every urination, laundries are troublesome if washable incontinence pants, the product structure of the disposable auxiliary pad is simple and inexpensive, For reasons such as.
[0003]
However, even if it is an inexpensive disposable auxiliary pad, it will be expensive if it is replaced every time incontinence or urination. In addition, the amount of garbage increases. For this reason, in particular, in the case of a disposable auxiliary pad using a top sheet excellent in dry feeling that does not return to the liquid, the wearer has less discomfort, so the number of wearers who use the disposable auxiliary pad for a relatively long time increases. ing.
[0004]
However, when the disposable auxiliary pad is replaced for a long time and used for a long time, the urine that exceeds the absorbent capacity of the disposable auxiliary pad is on the lower side of the auxiliary pad (on the opposite side of the skin) from both sides of the auxiliary pad. The leaked urine is concentrated in the place where the leaked urine is most likely to leak sideways on the base of the wearer's leg, and eventually leaks to the outside of the worn article and soils the sheets and clothing. There was a thing. In addition, it was a cause of back leakage while sleeping.
[0005]
[Problems to be solved by the invention]
As a result of examination by the present inventors on these leakage phenomena, it has been found that the cause of the leakage is the liquid-impervious plastic film backsheet of the disposable auxiliary pad. That is, since the liquid-impermeable back sheet covers the entire lowermost layer of the auxiliary pad, urine exceeding the absorption capacity of the absorber can only leak from the end of the auxiliary pad in the width direction or longitudinal direction. Since the absorbent body of the wearing article is manufactured assuming that the auxiliary pad is not used, it is naturally disposed in a portion where the auxiliary pad is located. As a result, urine leaking from the auxiliary pad flows around the absorbent body of the worn article, causing side leakage and rear leakage.
[0006]
Therefore, the present invention has been aimed at preventing side leakage and rear leakage from the wearing article by improving the configuration of the disposable auxiliary pad used together with the wearing article.
[0007]
[Means for Solving the Problems]
The auxiliary pad of the present invention that has solved the above problems is a disposable auxiliary pad that is used by being placed on the wearer side of these wearing articles when the wearer wears disposable or non-disposable wearing articles. The disposable auxiliary pad includes an absorbent body, a liquid-permeable top sheet laminated on the upper side of the absorbent body, and a back sheet laminated on the lower side of the absorbent body. The back sheet is a part of the excretory liquid. It has a gist where it is made of a material that can pass through.
[0008]
By adopting this configuration, a part of the urine absorbed by the disposable auxiliary pad is surely absorbed by the absorbent body of the wearing article existing under the auxiliary pad, so that side leakage and after-leakage will not occur. .
[0009]
A structure in which the back sheet is an opening sheet having an opening ratio of 20 to 50% and an opening area of one or more holes of 0.5 mm ² or more, or a non-woven laminate having a water pressure resistance of 30 mm or more according to JIS L1092. Are all preferred embodiments of the present invention.
[0010]
Further, the absorber comprises an upper layer absorber and a lower layer absorber and an intermediate layer interposed between these upper and lower layer absorbers, and the intermediate layer is a nonwoven fabric laminate having a water pressure resistance of 30 mm or more according to JIS L1092, or A configuration in which the intermediate layer is an opening sheet having an opening ratio of 20 to 50% and an area of each hole of 0.5 mm ² or more may be adopted. Due to the presence of the intermediate layer that transmits urine but is difficult to permeate, it diffuses widely in the upper absorbent body and captures urine, so that it can be absorbed efficiently, so that urine transfer to the wearing article can be delayed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a partially broken plan view showing an embodiment of the disposable auxiliary pad of the present invention. The disposable auxiliary pad P1 is formed by housing the absorbent body 3 between the back sheet 1 and the liquid-permeable top sheet 2 and appropriately bonding each member. And the large diameter hole H1 is formed in the center part of the said back seat | sheet 1. As shown in FIG. This hole H1 is formed at the center in the width direction of the auxiliary pad P1 and is formed with the center point slightly above the center in the length direction, because urination is on the front side immediately below the crotch in both men and women. In this embodiment, since the hole H1 is provided in a portion where a large amount of urine is present, a large amount of urine excreted or urine when exceeding the absorption capacity of the absorber 3 of the auxiliary pad P1, It moves to the wearing article side under the auxiliary pad P1, and is absorbed by the absorbent body of the wearing article. In addition, when attaching auxiliary pad P1 to the inner side (wearer's skin side) of a wearing article, the position of the hole H1 can be matched because the position of the urination can be matched with the position of the hole H1 by appropriately shifting the placement position. Is not limited. If necessary, a hydrophilic non-woven fabric or the like is interposed between the back sheet 1 and the absorbent body 3 in the hole H1 to improve the appearance and prevent the fibers from the absorbent body 3 and the superabsorbent polymer from falling off. May be performed.
[0012]
FIG. 2 is a plan view of a backsheet 21 according to another embodiment of the present invention. The back sheet 21 is provided with a plurality of holes H2 having various sizes. By using such a back sheet 21, urine is diffused throughout the absorber 3, and excess urine is appropriately transferred from the hole H 2 of the back sheet 21 to the wearing article side, so that side leakage does not occur. Further, since the back sheet 21 has the non-opening portion on the entire surface, the urine that has come into contact with the non-opening portion will permeate in the horizontal direction, further assisting the diffusion of urine throughout the absorber 3. It becomes. The pattern of the holes H2 is not limited to the pattern shown in FIG. Further, the shape of the hole H2 is not limited to a circle, and any other shape such as an ellipse or a polygon can be selected.
[0013]
In either case of providing only one large-diameter hole (FIG. 1) or a plurality of holes (FIG. 2), the area of the hole is preferably 0.5 mm ² or more. This is because if it is too small, the transfer of urine is hindered. A more preferable hole size is 1 mm ² or more, and further preferably 5 mm ² or more.
[0014]
Moreover, it is preferable that the ratio of the opening area which occupies for the area of the whole backsheet, ie, an opening rate shall be 20 to 50%. If the aperture ratio is less than 20%, the object of the present invention may not be sufficiently achieved. Further, if the opening exceeds 50%, it is not preferable because all the urine absorbed in the auxiliary pad is shifted to the wearing article side over time, and the meaning of using the auxiliary pad is lost.
[0015]
The material of the backsheet 1 is not particularly limited, but a soft film such as polyethylene or polypropylene, or a nonwoven fabric made of hydrophobic fibers such as polyethylene or polypropylene is preferable. In the case of a non-woven fabric, it is difficult to measure the aperture ratio. Therefore, it is preferable to use a non-woven fabric having a water pressure resistance of 30 mm or more according to the hydrostatic pressure method of JIS L1092. In order to achieve such a water pressure resistance, a plurality of nonwoven fabrics made of hydrophobic fibers may be laminated. Of course, the holes shown in FIG. 1 or 2 can be formed in the nonwoven fabric. The lower limit of the water pressure resistance is more preferably 40 mm or more, and further preferably 50 mm or more.
[0016]
The top sheet 2 is not particularly limited as long as it is a liquid-permeable material, but a nonwoven fabric or a film provided with a large number of holes is preferable in terms of touch. Since the auxiliary pad of the present invention can be used for a long time, it is preferable to use a top sheet having a dry feeling with little liquid return so that the wearer does not feel uncomfortable. For example, a laminate in which a nonwoven fabric made of hydrophobic fiber and a nonwoven fabric made of hydrophilic fiber are laminated and bonded together by needle punching can be used with the hydrophobic fiber nonwoven fabric side facing the skin surface, or the vicinity of the hole is made hydrophilic It is recommended to use a perforated plastic film that has been processed.
[0017]
The absorbent body 3 is not particularly limited as long as it has an action of absorbing urine, but natural pulp fibers, synthetic fibers, superabsorbent polymer powders, etc. are mixed or laminated, and the outer periphery is wrapped with thin paper to make the fibers Those configured not to desorb are preferably used.
[0018]
The example shown in FIG. 3 is a cross-sectional view for explaining an example in which the absorber 3 has a three-layer structure. In addition, although each member is described with a space therebetween for easy viewing, in reality, the members are appropriately bonded by an adhesive means such as heat seal or hot melt adhesive and are in close contact with each other. In FIG. 3, the intermediate layer 33b is provided between the upper layer absorber 33a and the lower layer absorber 33c. As the intermediate layer 33b, a hydrophobic fiber nonwoven fabric or an aperture sheet is preferable. As exemplified as the material for the back sheet, it is preferable to use a hydrophobic fiber non-woven fabric having a water pressure of 30 mm or more measured according to the hydrostatic pressure method of the low water pressure method of JIS L1092. As for, it is preferable to use what has one or more holes whose opening rate is 20 to 50% and whose opening area is 0.5 mm ² or more.
[0019]
The presence of the intermediate layer 33b partially inhibits urine absorbed in the upper layer absorber 33a from diffusing in the vertical direction and moving to the lower layer absorber 33c. Spread horizontally. For this reason, the transfer of urine from the upper-layer absorber 33a to the lower-layer absorber 33c is not concentrated at the urination location but is transferred after being diffused throughout the absorber 33a. Furthermore, even when passing through the back sheet 31 and shifting to the absorbent body of the wearing article (see FIG. 4) existing below the back sheet 31, the lower sheet absorber 33c moves to the lower side while being diffused. For this reason, the urine does not concentrate on a part and shift to the wearing article side, and the urine leakage effect is further enhanced. The absorber 3 does not have a three-layer structure as shown in FIG. 3, but a five-layer structure such as an absorber-intermediate layer-absorber-intermediate layer-absorber, or a laminated structure of more layers. You can also.
[0020]
In FIG. 3, the side part of the back sheet 31 is folded back to the top sheet 32 side, and the side part of the top sheet 32 is bonded on the folded end parts 31a and 31a. Note that the back sheet and the top sheet may be bonded (heat-sealed or the like) with their ends overlapped in a palm shape.
[0021]
FIG. 4 is a cross-sectional explanatory view showing a state in which the disposable diaper D is used as a wearing article and the disposable auxiliary pad P3 is overlaid on the crotch equivalent area. The left and right side portions of the disposable auxiliary pad P3 are provided with rising band members 54 and 54 each having an elastic thread 46 sealed at the tip, and the absorbent body has an opening sheet 43b as an intermediate layer formed by an upper layer absorber 43a and a lower layer absorber. It is provided between 43c. An absorber having a three-layer structure is sandwiched between a back sheet 41 having an opening (for example, a sheet as shown in FIG. 2) and a top sheet 42, and side portions of the back sheet 41 and the top sheet 42 are overlapped and bonded. Yes.
[0022]
On the other hand, the disposable diaper D has an absorbent body 53 interposed between a back sheet 51 and a top sheet 52, and is provided with rising band members 54 and 54 in which an elastic thread 55 is sealed at the tip, and a leg around the left and right. A plurality of elastic yarns 56 for gathering are provided.
[0023]
The behavior of urine when urine N is excreted to this auxiliary pad P3 is shown by solid line arrows and broken line arrows. The urine N passes through the top sheet 42 and moves into the upper absorbent body 43a to reach the opening sheet 43b, and the sheet 43b causes most of the urine N to diffuse in the length direction and width direction of the auxiliary pad P3. Part of the urine N passes through the hole of the opening sheet 43b and moves to the lower layer absorber 43c side. And it reaches | attains the opening back sheet | seat 41 and the spreading | diffusion in the lower layer absorber 43c starts. With this configuration, since the diffusion of urine N into the lower layer absorber 43c starts in earnest at the stage where the diffusion inside the upper layer absorber 43a is completed, that is, when the absorption capacity of the upper layer absorber 43a is exceeded, The absorption capacity of the absorber can be sufficiently exhibited.
[0024]
When there is more urination beyond the absorption capacity of the upper layer absorbent body 43a and the lower layer absorbent body 43c of the auxiliary pad P3, the excess urine passes through the hole of the back sheet 41 as shown by the broken line arrow, and the disposable diaper D Passes through the top sheet 52, reaches the absorber 53 below and is absorbed. Since the absorbent body 53 of the disposable diaper D is disposed below the disposable auxiliary pad P3, the absorbent body 53 is smoothly absorbed without causing side leakage. In the case of the conventional auxiliary pad, since urine leaks from both sides of the auxiliary pad, it leaks beyond the rising member 54 of the disposable diaper D. There is no leakage.
[0025]
【The invention's effect】
According to the invention of claim 1, even if urine exceeding the absorption capacity of the absorbent body is excreted, a part of the excreted liquid passes through the back sheet of the auxiliary pad, and the absorbent body of the wearing article below it Therefore, the sheet and clothing are not soiled by causing side leakage as in the conventional product. Moreover, since the absorption capacity of the absorbent body of the disposable auxiliary pad can be sufficiently exhibited, the replacement frequency of the auxiliary pad can be reduced.
[0026]
Moreover, since the opening sheet is an easy-to-obtain and inexpensive back sheet, the product price is not increased, and the position of the holes can be changed as appropriate, so that a part of the excretory fluid can be reliably transferred to the wearing article side. Can pass through.
[0027]
According to the inventions of claims 2 and 3, urine can be diffused in the length direction and width direction of the auxiliary pad inside the absorbent body of the auxiliary pad, and urine is prevented from concentrating on one place and penetrating downward. I was able to do it. Moreover, since urine is spread | diffused in planar shape, since it can absorb in the absorber whole area, it can be made to exhibit to the limit of the absorption capacity of an absorber. As a result, it is possible to further reduce the replacement frequency of the disposable auxiliary pad.
[Brief description of the drawings]
FIG. 1 is a partially broken plan view showing an embodiment of a disposable auxiliary pad according to the present invention.
FIG. 2 is a plan view showing another embodiment of the disposable auxiliary pad according to the present invention.
FIG. 3 is a cross-sectional view showing another embodiment of the disposable auxiliary pad according to the present invention.
FIG. 4 is a cross-sectional explanatory view showing a use state of the disposable auxiliary pad of the present invention.
[Explanation of symbols]
11, 21, 31, 41 Back sheet 12, 22, 32, 42 Top sheet 13, 23 Absorber 33a, 43a Upper layer absorber 33b, 43b Middle layer 33c, 43c Lower layer absorber P1, P2, P3 Disposable auxiliary pad N Urine

Claims (3)

When a wearer wears a disposable or non-disposable wearing article, a disposable auxiliary pad used by being placed on the wearer side of these wearing articles,
The disposable auxiliary pad includes an absorbent body, a liquid-permeable top sheet laminated on the upper side of the absorbent body, and a back sheet laminated on the lower side of the absorbent body. The back sheet is a part of the excretory liquid. A disposable auxiliary pad characterized by being an opening sheet having one or more holes having an opening ratio of 20 to 50% and an opening area of 0.5 mm ² or more . Absorber, an intermediate layer interposed between the upper layer absorbent body and the lower layer absorber and the upper and lower layers absorber according to claim 1 the intermediate layer is a nonwoven laminate water pressure resistance of more than 30mm by JIS L1092 Disposable auxiliary pad. The absorber includes an upper layer absorber, a lower layer absorber, and an intermediate layer interposed between the upper and lower layer absorbers. The intermediate layer has an opening ratio of 20 to 50% and an area of each hole of 0.5 mm ^2. The disposable auxiliary pad according to claim 1, which is the above-mentioned opening sheet.

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