JPH01119250A - Absorbable article - Google Patents

Abstract

PURPOSE:To certainly prevent the leakage from the crotch, by parallelly arranging the first and second absorbing bodies through a hydrophilic sheet. CONSTITUTION:A diaper 1 is equipped with the liquid permeable surface sheet 2 brought into contact with the skin at a wearing time, a liquid impermeable back surface sheet 3, the first absorbing body 4, whose width becomes narrow under the crotch, interposed between both sheets 2, 3 a pair of the second absorbing bodies 5 separated from the first absorbing body 4 at the narrow crotch part 10 of the absorbing body 4, tapes 7 for fixing the diaper to a user and extensible members 6 extending and contracting in the longitudinal direction of the diaper 1. The under surfaces of the first absorbing body 4 and second absorbing bodies 5 are covered with a hydrophilic sheet 11 and the excretion fluids incapable of being absorbed by the first absorbing body 4 are absorbed by a pair of the absorbing bodies 5 through the hydrophilic sheet 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disposable absorbent article for treating excretory fluids such as urine and menstrual blood.

[Conventional technology and its problems]

Conventionally, in disposable absorbent articles for treating excretory fluids such as urine and menstrual blood, the absorbent body may be simply rectangular or have a narrower crotch area. Since the width of the absorbent body is narrow at the wearer's crotch area, the fit is excellent at the wearer's crotch area. However, since the width of the absorbent body at the crotch area is substantially narrow, excretory fluid is not absorbed in the part of the crotch area where the absorbent body is not present, resulting in a drawback that leakage occurs from the crotch area.

Additionally, in order to overcome these drawbacks, there are some fabrics in which a cut is made in the crotch portion of the absorbent body and folded back to the center to make the center thicker and increase the absorbent capacity of the center. Representative examples include JP-A-57-71402 and JP-A-57-77302.
There is a diaper described in No. 57-77303,
These are diapers with a so-called hourglass-shaped absorbent body.
The crotch area is formed with a thicker layer than other areas, thereby increasing the absorbent capacity of the crotch area and attempting to prevent leakage of excretory fluid. However, as mentioned above, even if the absorption capacity in the central part is increased, the width of the absorbent core becomes narrower in the crotch area, and excreted liquid in the area where there is no absorbent core is not absorbed, so from the crotch area. The disadvantage of leakage cannot be avoided.

Furthermore, there is a two-layer absorbent body in which an absorbent body with a thick layer in the center and a wide rectangular absorbent body are overlapped. A typical example is the diaper described in Japanese Patent Application Laid-Open No. 59-66502, which is essentially a wide rectangular absorber with a thick layer in the center, and has excellent fit at the crotch area. I can't say that it is.

Furthermore, a groove-like cut portion having a constant width is formed radially toward the center of the substantially rectangular absorbent body,
Utility Model No. 61 in which an easily deformable deformable part is formed in the middle part of the absorber
-There is a sanitary napkin described in Publication No. 171919,
Since the absorbent body is continuous in the center, it cannot be said that it is necessarily easy to deform, and it also has the disadvantage that excretory fluid leaks through the groove-like cut portion having a certain width.

[Means for Solving the Problems] The present inventors have developed a disposable absorbent article that improves the fit of the wearer in the crotch area, reduces discomfort, and prevents leakage from the crotch area. should be obtained (
As a result of intensive research, we came to the following conclusions. That is, in order to improve the fit to the wearer at the crotch area, the width of the absorbent body at the crotch area needs to be narrow, and this also has the effect of reducing discomfort. However, this cannot prevent leakage from the crotch area. Therefore, we have come to the conclusion that the above object can be achieved by providing an absorbent body that absorbs the excreta that cannot be absorbed by the narrow lower crotch of the absorbent body as the best measure to prevent leakage. It has been completed.

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 two sheets, in which the absorbent body has a first width that is narrower in the crotch area. It has an absorbent body and a pair of second absorbent bodies provided at positions away from the first absorbent body on both sides of the narrowed part, the first absorbent body and a pair of second absorbent bodies. The present invention provides an absorbent article characterized in that absorbers are 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 as seen from the front side, and FIG. 2 is a
It is an enlarged sectional view along the X-ray. In FIG. 1, a diaper 1 includes a liquid-permeable top sheet 2 that comes into contact with the skin when worn;
A liquid-impermeable back sheet 3, a first absorbent body 4 whose width is narrow at the crotch portion interposed between these two sheets, and the first absorbent body 4 at the narrow crotch portion 10 of the absorbent body. The diaper includes a pair of second absorbent bodies 5 separated from each other, a tape 7 for fixing to the wearer, and an elastic member 6 for expanding and contracting the diaper in the longitudinal direction. In addition, as shown in FIG. 2, the first absorbent body 4 and the pair of second absorbent bodies 5 are connected by covering their lower surfaces with a hydrophilic sheet ll. It is fixedly bonded to the inside of at least one highly impermeable back sheet 3 with an adhesive 9.

As for the material of the absorbent body, the first absorbent body, which is the main absorbent body, is mainly made of cotton-like pulp and a conventionally known superabsorbent polymer made of starch type, polyacrylic acid type, or a copolymer thereof. Preferably, the second absorbent body is
Although the function can be achieved even if only cotton pulp is used, it is preferable that the main materials are cotton pulp and the superabsorbent polymer as in the first absorbent body. Moreover, although the elastic member 6 is not necessarily necessary for the present invention, it is preferable to provide it for double safety in order to further prevent leakage in the crotch area.

Note that the hydrophilic sheet 11 is not extremely special;
It is a sheet-like material made of hydrophilic fibers such as absorbent paper, pulp, or rayon, which is conventionally known and used for diapers, sanitary napkins, etc.
The adhesive 9 may be 50 g/%, and it is preferable that the adhesive 9 is a soft rubber adhesive and is used in the form of a spray or cotton.

Further, FIG. 3 shows plan views of various absorbers used in the disposable absorbent article of the present invention, and the absorbers, which are the main object of the present invention, are shown in FIGS. 3(a), (b),
As shown in (c) and (d), the first absorbent body 4 and the pair of second absorbent bodies 5 can have any shape, and both have similar effects. Figure 3 (a), (b), (C)
, (d) is a view with the hydrophilic sheet 11 facing downward, and the shaded area in FIG. 3 indicates the portion where the width of the lower hydrophilic sheet is visible.

Further, in FIG. 1, a tape 7 for fixing to the wearer and an elastic member 6 are installed in the crotch area, but these are not necessarily necessary conditions in the present invention. That is, FIG. 4 is a plan view of an embodiment of the present invention in a sanitary napkin, which is another embodiment of the present invention, seen from the surface side, and FIG. 5 is a plan view taken along the Y-Y line in FIG. It is an enlarged sectional view.

In FIG. 4, the sanitary napkin 8 is as shown in FIG.
A first absorbent body 4 whose width is narrow at the crotch area and a pair of second absorbent bodies 5 separated from each other are bonded to each other via an adhesive 9 via a hydrophilic sheet 11.
fixedly adhered to the liquid-impermeable back sheet 3 by
Furthermore, it is surrounded by a liquid-permeable top sheet 2.

The first absorbent body 4 and the second absorbent body 5 according to the present invention have different sizes depending on the purpose of use, but in a diaper mainly intended to absorb urine in terms of -S, The narrow part of the absorber No. 1 has a wide range of 5 to 25 C++, and is preferably in the range of 5 to 15 cm for Akarayan and 15 to 25 C11 for adults. Regarding sanitary napkins, which are mainly intended to absorb menstrual blood,
The narrow part of the first absorbent body is preferably 2 to 5 cm, and in both cases of diapers and sanitary napkins, the size of the second absorbent body is determined according to the overall size of the absorbent body required for the absorbent article. Accordingly, the first absorbent body is located apart from the first absorbent body. In addition,
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 deform as shown in FIG. A distance corresponding to the thickness of the absorbent body is required, and the inside of the membrane preferably ranges from 3 to 15 mm for sanitary napkins and from 5 to 25 mm for diapers.

〔Example〕

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

Examples 1 to 4 and Comparative Examples 1 to 3 Diapers using the absorbent bodies of Figures 3(a), (b), (C), and (d), conventional hourglass-shaped diapers, and rectangular absorbent bodies. 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. 3(a).
As shown in FIG. Third
As shown in Figures (B), (C), and (d), the diaper is made up of a first absorbent body and a second absorbent body separated from each other.

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

Comparative Example 2 had the same shape as Comparative Example 1, but used an absorbent body in which the second absorbent body was overlapped at the center of the first absorbent body so that the center was substantially bulky.

Comparative Example 3 used a wide rectangular absorber.

In addition, the method of evaluating the performance of the diaper is to use a baby model as shown in Figure 7, put the diaper on, and inject 50 @ 1 of physiological saline YK at a rate of 50 mJ/30 seconds in a sitting position.
The sample was left as it was for 5 minutes, and the amount of injection until leakage was repeated was defined as the model absorption amount. In addition, ease of application and ease of movement were measured by actually wearing the diaper on a baby and observing it. The criteria for judgment are as follows.

O...Easy to apply (easy to move) Δ...Slightly easy to apply (slightly easy to move) ×...Difficult to apply (difficult to move) As a result of this evaluation, as shown in Table 1, the present invention This diaper is easy to apply and move around in, and it weighs about 200g, which is equivalent to the amount of urine a baby urinates at night.
It has excellent performance that will not leak.

Table 1 [Effects of the Invention] When the absorbent article according to the present invention configured as described above is worn, the shaded areas in FIGS. 1 and 4 are easily deformed as shown in FIG. The absorbent body fits inside the wearer's crotch area to reduce discomfort, and furthermore, the excretory fluid that cannot be absorbed by the first absorbent body passes through the hydrophilic sheet and fits inside the wearer's crotch area. By absorbing with the paired second absorbent body, leakage from the crotch can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a partially developed plan view showing an embodiment of the present invention in a diaper as seen from the front side, and FIG. 2 is a
An enlarged sectional view taken along the X-ray, FIG. 3 is a plan view of the absorbent body used in the absorbent article of the present invention, and FIG. 4 is a plan view from the front side showing an embodiment of the present invention in a sanitary napkin. , FIG. 5 is an enlarged sectional view taken along the Y-Y line in FIG. 4, FIG. 6 is a schematic diagram of the crotch area when the disposable absorbent article of the present invention is used, and FIG. 7 is a diaper evaluation method. An explanatory diagram showing. 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 ... Sanitary napkin 9 ... Adhesive 10 ... Narrow crotch lower part 11 ... Hydrophilic sheet

Claims (1)

[Claims] 1. In an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body located between these two sheets, the absorbent body includes a first absorbent body whose width is narrow in the crotch area; A pair of second absorbent bodies are provided at positions apart from the first absorbent body on both sides of the narrowed width region, and the first absorbent body and the pair of second absorbent bodies are hydrophilic. An absorbent article characterized by being connected by a flexible sheet.