JPH0728892B2 - Absorbent article - Google Patents

Description

TECHNICAL FIELD The present invention relates to a disposable absorbent article for treating excreted liquid such as urine and menstrual blood.

[Conventional technology and its problems]

Conventionally, in a disposable absorbent article for treating excreted liquid such as urine and menstrual blood, there are those in which the absorbent body is simply rectangular or the width of the crotch is narrow, but the latter is more preferable. Since the width of the absorber in the crotch of the wearer is narrow, the fit in the crotch is excellent. However, since the width of the absorber in the crotch is substantially narrow, the excretory liquid is not absorbed in the part of the crotch where the absorber is not present, so that there is a drawback that leakage occurs from the crotch.

Further, in order to eliminate these drawbacks, there is one in which a notch is made in the crotch part of the absorbent body and folded back to the central part to thicken the central part to increase the absorption capacity of the central part. Typical examples are JP-A-57-71402, JP-A-57-77302, and JP-A-57-7730.
There are diapers described in JP-A-3, which are diapers having a so-called hourglass-shaped absorbent body, in which the crotch region is formed in a thicker layer than other regions, thereby increasing the absorption capacity of the crotch region and excreted liquid. Trying to prevent leaks. However, similar to the above, even if the absorption capacity in the central part is increased, the absorbent body is substantially narrowed in the crotch part, and the excreted liquid in the part where the absorbent body does not exist is not absorbed. The drawback of leaking is inevitable.

Furthermore, there is a two-layered absorber in which an absorber having a thick layer at the central portion and a wide rectangular absorber are stacked. As a typical example, there is a diaper described in Japanese Patent Laid-Open No. 59-66502, but it has an excellent fit in the crotch, which is substantially the same as a thick rectangular central absorbent body. I can't say that

Furthermore, a split groove-shaped notch having a constant width is formed radially in the direction of the center of the substantially rectangular absorber,
A practically deformable deformation part is formed in the middle part of the absorber.
There is a sanitary napkin described in 171919 gazette, but it is not always easy to deform because the absorber is continuous in the central part, and the excreted liquid is transmitted through the slit-shaped cut part having a certain width. It has the drawback of leaking.

[Means for solving problems]

As a result of earnest research to obtain a disposable absorbent article having the features that the present inventors enhance fit to a wearer in the crotch, reduce discomfort, and prevent leakage from the crotch, the following results are obtained. I got such a conclusion. That is, in order to enhance the fit to the wearer in the crotch part, the absorber in the crotch part needs to be narrow, and it also has the effect of reducing discomfort. However, this cannot prevent leakage from the crotch. Therefore, as a maximum preventive measure of leakage, it is concluded that the above-mentioned object can be achieved by providing an absorber that should absorb the excretory liquid that cannot be completely absorbed by the narrow crotch part of the absorber, and the present invention can be achieved. It came to completion.

That is, the present invention provides an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body located between these sheets, wherein the absorbent body has a narrow width at the crotch. It has an absorber and a pair of second absorbers provided at positions apart from the first absorber on both sides of the narrowed portion, and the first absorber and the pair of second absorbers are provided. The absorbent article is characterized in that the absorbent body is connected by a hydrophilic sheet.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these.

FIG. 1 is a partially developed plan view showing an embodiment of the present invention in a diaper viewed from the front side, and FIG. 2 is an X- line in FIG.
It is an expanded sectional view along an X-ray. In FIG. 1, a diaper 1 is a liquid-permeable surface sheet 2 that comes into contact with the skin when worn,
The liquid impermeable back sheet 3, the first absorbent body 4 narrowed in the crotch portion interposed between the both sheets, and the first absorbent body 4 in the narrow crotch portion 10 of the absorbent body. It is provided with a pair of second absorbers 5 apart from each other, a tape 7 for fixing to the wearer, and an elastic member 6 for expanding and contracting in the longitudinal direction of the diaper. In addition, the first absorber 4 and the pair of second
2, the absorbent body 5 is connected by being covered with a hydrophilic sheet 11 at least on its lower surface,
At least the liquid impermeable back sheet 3 through the sheet
It is fixedly adhered to the inner side by an adhesive 9.

As the material of the absorbent body, the first absorbent body, which is the main body of the absorbent body, is mainly composed of a cotton-like pulp and a conventionally known superabsorbent polymer composed of starch type or polyacrylic acid type or a copolymer thereof. The second absorber is preferably
Although only cotton-like pulp can fulfill its function, it is preferable to use cotton-like pulp and the superabsorbent polymer as the main materials as in the first absorbent body. Further, the elastic member 6 is not always necessary for the present invention, but it is preferable to install the elastic member 6 for double safety to prevent leakage of the crotch.

Incidentally, the hydrophilic sheet 11 is not a very special one, and is a sheet-like material made of hydrophilic fibers such as absorbent paper or pulp or rayon which is conventionally used for diapers or sanitary napkins, etc., and is generally known. Basis weight is 10-50g /
m ² is fine. The adhesive 9 is preferably a soft rubber-based adhesive and is used in the form of spray or cotton.

Further, FIG. 3 shows plan views of various absorbers used in the disposable absorbent article of the present invention. Regarding the absorber which is the main object of the present invention, FIG. 3 (a), (b),
As shown in (c) and (d), the shapes of the first absorber 4 and the pair of second absorbers 5 are free, and both have the same effect. 3 (a), (b), (c), (d)
Is a view of the hydrophilic sheet 11 viewed from below, and the hatched portion in FIG. 3 indicates the portion where the hydrophilic sheet 11 on the lower side is visible.

Further, in FIG. 1, the tape 7 for fixing to the wearer and the elastic member 6 are provided on the crotch part, but this is not a necessary condition in the present invention. That is, FIG. 4 is a plan view seen from the surface side showing an embodiment of the present invention in a sanitary napkin which is another embodiment of the present invention, and FIG. 5 is taken along line YY in FIG. It is an expanded sectional view.
In the sanitary napkin 8 in FIG. 4, as shown in FIG. 5, a pair of second absorbent bodies 5 apart from the first absorbent body 4 which is narrowed at the crotch portion are separated by a hydrophilic sheet 11. It is fixedly adhered to the liquid-impermeable backsheet 3 with an adhesive 9, and further wrapped with the liquid-permeable topsheet 2.

The sizes of the first absorbent body 4 and the second absorbent body 5 according to the present invention are different depending on the purpose of use, but in the diaper generally intended to mainly absorb urine, The wide range of the narrow part of the absorber of 5 to 25 cm,
5 to 15 cm for babies, 15 to 25 cm for adults
Is preferred. Further, for the sanitary napkin mainly intended to absorb menstrual blood, the narrow portion of the first absorbent body is preferably 2 to 5 cm, and in any case of the diaper and the sanitary napkin, the second The size of the absorber is set apart from the first absorber according to the size of the entire absorber required for the absorbent article. Regarding the distance between the first absorbent body 4 and the second absorbent body 5 according to the present invention, in order for the second absorbent body 5 to be deformed as shown in FIG. The distance corresponding to the thickness of the absorbent body in ² ) is necessary, and generally, the range of 3 to 15 mm for sanitary napkins and 5 to 25 mm for diapers are preferable.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Examples.
The invention is not limited to these examples.

Examples 1 to 4 and Comparative Examples 1 to 3 have a diaper using the absorbent body of FIGS. 3 (a), (b), (c), and (d), a conventional hourglass-shaped diaper, and a rectangular absorbent body. A diaper was manufactured and its performance is shown in Table 1.

In addition, in Example 1, a conventional rectangular absorber is shown in FIG.
As described above, the diaper is installed by cutting into the first absorbent body and the second absorbent body, and Example 2, Example 3, and Example 4 are the conventional rectangular absorbent bodies used in Example 1, respectively. Third
As shown in FIGS. (B), (c), and (d), this is a diaper installed by cutting into a first absorbent body and a second absorbent body.

Further, in Comparative Example 1, an hourglass-shaped absorbent body excluding the second absorbent body of Example 1 was used.

In Comparative Example 2, the shape was the same as that of Comparative Example 1, but an absorbent body was used in which the portion of the second absorbent body was overlapped with the center of the first absorbent body and the center was substantially high.

In Comparative Example 3, a wide rectangular absorber was used.

As shown in Fig. 7, a baby model is used to evaluate the performance of a diaper, and a diaper is attached to the diaper, and 50 ml of physiological saline is infused at a sitting position at a rate of 50 ml / 30 seconds and left for 5 minutes. The model absorption amount was defined as the injection amount until repeated leakage. Moreover, the ease of applying and moving was observed by actually mounting the above diaper on a baby. The judgment criteria are as follows.

○: easy to apply (easy to move) Δ: slightly easy to apply (slightly easy to move) ×: difficult to apply (hard to move) As a result of evaluation in this manner, as shown in Table 1, the diaper of the present invention is easy to apply It is also a mobile diaper, and has excellent performance that does not leak up to approximately 200 g, which is comparable to the baby's night urine output.

[Advantages of the Invention] When the absorbent article according to the present invention configured as described above is worn, the shaded portions in FIGS. 1 and 4 are easily deformed as shown in FIG. 6 to form a pair of second absorbent bodies. Fits inside the wearer's crotch and reduces discomfort, and the excreted liquid that cannot be completely absorbed by the first absorbent body is transmitted through the hydrophilic sheet and fits inside the wearer's crotch with a pair of second By absorbing with an absorber, leakage from the crotch can be prevented.

[Brief description of drawings]

FIG. 1 is a partially developed plan view showing an embodiment of the present invention in a diaper viewed from the front side, and FIG. 2 is an X- line in FIG.
An enlarged cross-sectional view taken along the X-ray, FIG. 3 is a plan view of an absorbent body used in the absorbent article of the present invention, and FIG. 4 is a plan view of an embodiment of the present invention in a sanitary napkin as seen from the front side. FIG. 5 is an enlarged cross-sectional view taken along the line YY in FIG. 4, FIG. 6 is a schematic view of a crotch portion when the disposable absorbent article of the present invention is used, and FIG. 7 is a method for evaluating a diaper. FIG. 1 ... Diaper 2 ... Liquid-permeable top sheet 3 ... Liquid-impermeable back sheet 4 ... First absorbent body 5 ... Second absorbent body 6 ... Elastic member 7 ... Tape 8 ... Physiology Napkin 9 …… Adhesive 10 …… Narrow crotch 11 …… Hydrophilic sheet

Claims (1)

[Claims] 1. An absorbent article having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber located between these sheets, wherein the absorber has a narrow width at the crotch portion. It has an absorber and a pair of second absorbers provided at positions apart from the first absorber on both sides of the narrowed portion, and the first absorber and the pair of second absorbers are provided. An absorbent article comprising an absorbent body and a hydrophilic sheet connected to each other.