JP2004201939A - Absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorptive article by which a body liquid is not retained by a top sheet and dry feeling is obtained in a short period by improving absorptivity, and which can be produced at a low cost. <P>SOLUTION: In the absorptive article whose main body is formed of the liquid-permeable top sheet having a second sheet as a lower layer, a liquid-impermeable back sheet having a waterproof film as an upper layer and an absorber interposed between the top sheet and the back sheet, a spunbonded nonwoven fabric of long fibers is used as the second sheet. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【００２４】
表１は本パッド２００におけるトップシート２０１とセカンドシート２０９の数値化された嵩密度の異なる組み合わせを５通り（実施例１〜実施例５）選んで表したものである。表１において、官能評価とは前記さらっと感、具体的には人口尿を吸収体２０３に滴下し、吸収速度を測定した後、トップシート２０１の表面に手で軽く触れて、その乾き具合を表したものである。なお判断基準は○印の「乾いている」、×印の「かなり湿っている」の２段階とした。
【００２５】
この結果、表１から明らかなように、さらっと感はトップシート２０１に対するセカンドシート２０９の嵩密度の比が１．５以下のときに得られることが判明した。
【００２６】
【発明の効果】
以上に詳述したように、本発明に係る吸収性物品によれば、セカンドシートの吸収性を向上させることができ、またセカンドシートを介して吸収体への体液の吸収速度も上昇させることができるので、トップシートに保水する体液がなくなる。従って、着用者にさらっと感を与える効果を有する。
【００２７】
さらに、セカンドシートに長繊維のスパンボンド不織布を用いたことによりハンドリング性、生産性が良くなり、吸収性物品の製造コストを低減することができる。
【図面の簡単な説明】
【図１】本発明の実施例に係るおねしょ用パッドの使用状態時における斜視図である。
【図２】図１のＹ−Ｙ断面図である。
【図３】従来の使い捨て紙おむつの使用状態時における斜視図である。
【図４】図３のＸ−Ｘ断面図である。
【符号の説明】
１００ 紙おむつ
２００ おねしょ用パッド
１０１，２０１ トップシート
１０２，２０２ バックシート
１０３，２０３ 吸収体
１０８，２０８ 便溜部
１０９，２０９ セカンドシート
１１１，２１１ 防水フィルム
１１２ 紙シート[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an absorbent article such as a disposable disposable diaper or a sanitary napkin, and more particularly to an absorbent article excellent in terms of absorbency and manufacturing cost.
[0002]
[Prior art]
A conventional absorbent article, for example, a disposable paper diaper 100 as shown in a perspective view in FIG. 3, usually has a liquid-permeable top sheet 101, a liquid-impermeable back sheet 102, and a sheet interposed between the sheets. The main body 104 is formed with the absorber 103 interposed.
[0003]
In this disposable diaper 100, a front target tape 105 is provided at the abdomen position of the front body F, and fastening tapes 106 for fastening are provided at both ends of the waist position of the back body B. Furthermore, gathers 107 for preventing leakage are provided around leg portions on both sides of the inner surface of the top sheet 101, and a substantially elliptical toilet bowl 108 is formed at the longitudinal center of the main body 104.
[0004]
FIG. 4 is a cross-sectional view taken along the line XX of FIG. 3 and shows a more detailed layer configuration of the disposable diaper 100. As shown in the figure, this layer configuration includes a liquid-permeable top sheet 101 made of a nonwoven fabric or the like, a second sheet 109 made of a similar material, and an absorbent coated with a tissue 110 in order from the surface side, that is, the side in contact with the wearer's body. A body 103, a waterproof film 111 made of polyethylene or the like, and a liquid-impermeable back sheet 102 made of a nonwoven fabric or the like are provided.
[0005]
Conventionally, a liquid-permeable dry nonwoven fabric that has been hydrophilically treated with polypropylene, polyethylene, polyester, or the like is generally used for the top sheet 101.
[0006]
Further, as the second sheet 109, a nonwoven fabric or the like formed by bonding short fibers of heat fusion fibers by an air-through method is used.
[0007]
However, in the above-mentioned conventional absorbent article, that is, the disposable diaper 100, the speed until the body fluid is completely absorbed by the absorber 103 is slow, and therefore, the body fluid retained between the top sheet 101 and the absorber 103 is reduced. In some cases, the absorbent 103 may return to the top sheet 101 (wet back), and the wearer does not feel dry. In the present invention, the sense of dryness means that the absorption rate of body fluid is high, and the wet portion of the sheet does not retain water and has a soft touch.
[0008]
In order to solve this problem, as shown in FIG. 4, a paper sheet 112 made of a softwood pulp fiber or the like is laminated on the surface of a long-fiber non-woven fabric formed by accumulating many long fibers, and subjected to a high-pressure water column flow. Thus, an absorbent article using a nonwoven fabric formed by entanglement of pulp fibers and long fibers for the second sheet 109 has been proposed (for example, see Patent Document 1).
[0009]
[Patent Document 1] Japanese Patent Application Laid-Open No. 9-562 (Page 5, line 2 to page 6, line 42)
[0010]
[Problems to be solved by the invention]
However, in the above-mentioned conventional absorbent article, the body fluid is often absorbed by the paper sheet 112 and is not absorbed by the absorber 103, and the body fluid absorbed by the paper sheet 112 returns to the top sheet 101. There was something. This gives the wearer discomfort, especially in the case of infants, causing skin rash. Further, such a conventional absorbent article also has a drawback that the production cost is increased due to the material, the process and the like.
[0011]
Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to further improve the absorbency, without bodily fluids retaining water on the top sheet, and to obtain a dry feeling in a short time, and An object of the present invention is to provide an absorbent article that can be manufactured at low cost.
[0012]
[Means for Solving the Problems]
The object of the present invention is to provide a liquid-permeable top sheet having a second sheet in a lower layer, a liquid-impermeable back sheet having a waterproof film in an upper layer, and an absorber interposed between the top sheet and the back sheet. This is achieved by providing an absorbent article using a long-fiber spunbonded nonwoven fabric for the second sheet in the absorbent article having a main body formed by the method.
[0013]
Further, the above object of the present invention can be more effectively achieved by providing an absorbent article in which the ratio of the bulk density of the second sheet to the top sheet is 1.5 or less.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a bed for a bed (hereinafter, referred to as a “pad”) 200 which is an example of the absorbent article according to the present invention, and FIG. 2 shows a layer configuration of a toilet reservoir 208 which is a main part of FIG. It is -Y sectional drawing. Note that the present pad 200 is obtained by eliminating the paper sheet 112 in the above-described conventional disposable diaper 100 and changing the configuration of the second sheet 109, and the other configurations are substantially the same. Therefore, hereinafter, components corresponding to the above-mentioned conventional disposable diaper 100 will be described with the same reference numerals in the 200s.
[0015]
That is, similar to the disposable diaper 100, the pad 200 includes a top sheet 201 having a second sheet 209 in a lower layer, a back sheet 202 having a waterproof film 211 in an upper layer, and an interposition between the top sheet 201 and the back sheet 202. The main body is formed by the absorber 203 covered with the tissue 210.
[0016]
The pad 200 is provided with three-dimensional gathers 207 for preventing leakage on both sides in the longitudinal direction of the top sheet 201, and a substantially elliptical toilet reservoir 208 is formed at the center thereof.
[0017]
The top sheet 201 is a liquid-permeable sheet that allows body fluids to pass through the absorber 203, and is preferably made of a material that has a feeling close to that of underwear, has a fine texture, and has a high fiber density. As such a liquid-permeable sheet, for example, a woven fabric, a nonwoven fabric, a porous film and the like are preferably used.
[0018]
As the second sheet 209, a long-fiber spunbonded nonwoven fabric having a higher body fluid absorption rate than the top sheet 201 and a lower fiber density than the top sheet 201 is used. As such a long-fiber spunbonded nonwoven fabric, for example, nylon, polyester and the like are preferably used.
[0019]
Long fiber spunbonded nonwoven fabrics are bulkier and have a higher fiber density than conventional air-through nonwoven fabrics. Therefore, the absorption rate at which the bodily fluid is absorbed by the absorber 203 via the second sheet 209 is increased, and the absorption rate of the second sheet 209 itself is also improved. Productivity also increases.
[0020]
Further, in the present pad 200, since the conventional paper sheet 112 is omitted while the spunbonded nonwoven fabric of the long fiber is used, the body fluid is quickly absorbed by the absorber 203. For this reason, the body fluid does not return to the top sheet 201, and the top sheet 201 does not retain water, so that the wearer can feel refreshed. Further, since the layer configuration is simple, the pad 200 itself can be manufactured at low cost.
[0021]
Above, the content of the present invention, the absorbent article has been described as an example of a bed pad, but the present invention is not limited to such a bed pad, other disposable paper diapers, sanitary napkins, pants for incontinent persons, etc. It is needless to say that the present invention can also be applied to the known absorbent articles.
[0022]
【Example】
Here, the following experiment was conducted with respect to the preferable bulk density ratio of the absorbent sheet according to the present invention, that is, the top sheet 201 and the second sheet 209 constituting the pad 200.
[0023]
[Table 1]

[0024]
Table 1 shows five combinations (Examples 1 to 5) of different combinations of the quantified bulk densities of the top sheet 201 and the second sheet 209 in the pad 200. In Table 1, the sensory evaluation refers to the above-mentioned dry feeling, specifically, artificial urine is dropped on the absorber 203, and after measuring the absorption rate, the surface of the top sheet 201 is lightly touched with a hand to determine how dry it is. It is a representation. The judgment criteria were two stages, that is, "○" is "dry" and "x" is "very wet".
[0025]
As a result, as is clear from Table 1, it was found that the dry feeling was obtained when the ratio of the bulk density of the second sheet 209 to the top sheet 201 was 1.5 or less.
[0026]
【The invention's effect】
As described in detail above, according to the absorbent article according to the present invention, the absorbability of the second sheet can be improved, and the absorption rate of the bodily fluid to the absorber through the second sheet can be increased. As a result, there is no body fluid remaining on the topsheet. Therefore, it has the effect of giving the wearer a light feeling.
[0027]
Further, by using a long-fiber spunbonded nonwoven fabric for the second sheet, handling properties and productivity are improved, and the manufacturing cost of the absorbent article can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a bed pad according to an embodiment of the present invention in a use state.
FIG. 2 is a sectional view taken along line YY of FIG.
FIG. 3 is a perspective view of a conventional disposable disposable diaper in use.
FIG. 4 is a sectional view taken along line XX of FIG. 3;
[Explanation of symbols]
REFERENCE SIGNS LIST 100 disposable diaper 200 bed pad 101, 201 top sheet 102, 202 back sheet 103, 203 absorber 108, 208 toilet section 109, 209 second sheet 111, 211 waterproof film 112 paper sheet

Claims (2)

An absorbent body having a liquid-permeable topsheet having a second sheet in a lower layer, a liquid-impermeable backsheet having a waterproof film in an upper layer, and an absorber interposed between the topsheet and the backsheet. An absorbent article, wherein a long fiber spunbonded nonwoven fabric is used for the second sheet. The absorbent article according to claim 1, wherein a ratio of a bulk density of the second sheet to the top sheet is 1.5 or less.

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