JPH0520104B2 - - Google Patents
Info
- Publication number
- JPH0520104B2 JPH0520104B2 JP60185837A JP18583785A JPH0520104B2 JP H0520104 B2 JPH0520104 B2 JP H0520104B2 JP 60185837 A JP60185837 A JP 60185837A JP 18583785 A JP18583785 A JP 18583785A JP H0520104 B2 JPH0520104 B2 JP H0520104B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- layer
- cotton
- absorbing
- water absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 238000010521 absorption reaction Methods 0.000 claims description 19
- 239000002250 absorbent Substances 0.000 claims description 16
- 230000002745 absorbent Effects 0.000 claims description 15
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 description 9
- 210000002700 urine Anatomy 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- -1 polypropylene Polymers 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Description
〔産業上の利用分野〕
本発明は使いすておむつに関するものである。
更に詳しくは吸水性能の優れた使いすておむつに
関するものである。
〔発明の背景〕
使いすておむつは周知のとおりポリエステル、
ポリプロピレン或いはレーヨンなどの不織布から
成る液透過性の表面シートとポリエチレン、ポリ
プロピレンなどのフイルムから成る液不透過性の
防水シートとその間に挿入された綿状パルプ、吸
水紙などからなる吸水層から構成されている。
また、最近吸水層の吸水能を向上させ、更には
使いすておむつ全体を出来るだけ薄く、且つ、コ
ンパクトにするために高吸水性高分子物質が用い
られるようになつてきている。
高吸水性高分子物質としては、ポリアクリル酸
系、デンプン系、カルボキシメチルセルロース系
など各種のものが市販されており、いずれも使用
可能であるが、従来市販されている使いすておむ
つにおいては高吸水性高分子物質を綿状パルプの
中に均一に分散させて用いたり、あるいは綿状パ
ルプと綿状パルプの間に層状に散布して用いた
り、吸水紙の間に入れたものを吸水層の中間に入
れて用いたりされていた。
しかしながら、このような用い方では高価な高
吸水性高分子物質を多量に用いる割には吸水性能
も十分発揮されず、価格が高くなるなどの問題が
あつた。
〔発明の目的〕
本発明は、従来の使いすておむつの前記問題点
を解決し、吸水性能の優れた安価な使いすておむ
つを提供することを目的とする。
〔発明の構成〕
本発明は液透過性の表面シート及び液不透過性
の裏面シートの間に上層部を形成する綿状パルプ
からなる第１吸水層３と、下層部を形成する綿状
パルプからなる第２吸水層６を有し、且つ、第１
吸水層と第２吸水層の間に高吸水性高分子物質粉
体層を有する使いすておむつにおいて、第１吸水
層３に対する第２吸水層６の重量の比が（３の重
量／６の重量）が0.25以上0.45未満である使いす
ておむつである。
即ち、第１吸水層を第２吸水層よりも薄くし
て、その間に高吸水性高分子物質粉体を第２吸水
層上に散布した形で使用することを特徴とする使
いすておむつである。
本発明の使いすておむつの構成を第１図に示
す。
第１図において、符号１は液透過性シートを示
す。通常ポリエステル、ポリプロピレン、あるい
はレーヨンなどを素材とした不織布が使用されて
いるが、いずれを使用しても良い。２は吸水紙、
３は綿状パルプからなる第１吸水層であり、４の
吸水紙はついていては、あつてもなくてもいずれ
でも良い。５は高吸水性高分子物質であり、市販
されているポリアクリル酸系、デンプン系、カル
ボキシメチルセルロース系など全ての高吸水性高
分子物質が使用可能である。６は綿状パルプから
なる第２吸水層、７は吸水紙、８はポリエチレン
フイルムからなる液不透過性シートである。
なお、本発明で、第１吸水層及び第２吸水層と
して用いられる綿状パルプ、は特殊な加工及び処
理を施こしてない解繊パルプである。
本発明者らは上記構造の使いすておむつについ
て第１吸水層と第２吸水層の重量を変えた場合の
効果について鋭意検討した結果第１吸水層３に対
する第２吸水層６の重量の比が0.25以上0.45未満
である時に、従来の様に高吸水性高分子を中央部
においた場合、あるいは下部においた場合に較
べ、使い捨ておむつの他の特性、即ち、吸収材の
単位面積あたりの吸水量を減らすことなく、尿の
逆もどりの尺度である。ウエツトバツク値を大巾
に向上させることが可能となることを見出だし
た。
以下実施例に基いて本発明を更に詳しく説明す
る。
実施例 １
第１図に示した構造のおむつを第１吸水層３及
び第２吸水層６の重量を、綿状パルプの量を変え
ることにより変えたサンプルを試作した。第１吸
水層及び第２吸水層に使用した綿状パルプは合計
で400ｇ／m2である。また、高吸水性高分子物質
としては日本触媒(株)製のアクアソツク−CAOを
使用し、40ｇ／m2の割合で添加した。使用吸水紙
は重量19ｇ／m2、また表面シートとしては23ｇ／
m2のポリエステル不織布（クラフレツクス(株)製）
を使用した。第１吸水層、第２吸水層及び高吸水
性高分子物質を組立てた後プレスした。プレス後
の吸水材の緊度は0.08〜0.09ｇ／cm3の範囲であつ
た。テストには人工尿（尿素0.06％、塩化ナトリ
ウム0.80％、硫酸マグネシウム0.10％、塩化カル
シウム0.06％、残り……純水）を使用した。
結果を第１表に示すが第１吸水層Ａと第２吸水
層Ｂの重量の比が0.25以上0.45未満の場合、吸水
量は殆んど変化することなく、尿の逆戻りの尺度
であるウエツトバツク値を大巾に改善することが
判る。
[Industrial Field of Application] The present invention relates to disposable diapers.
More specifically, the present invention relates to a disposable diaper with excellent water absorption performance. [Background of the invention] As is well known, disposable diapers are made of polyester,
It consists of a liquid-permeable surface sheet made of nonwoven fabric such as polypropylene or rayon, a liquid-impermeable waterproof sheet made of polyethylene or polypropylene film, and a water-absorbing layer made of cotton pulp, water-absorbing paper, etc. inserted between them. ing. In addition, recently, superabsorbent polymeric substances have been used to improve the water absorption capacity of the water absorption layer and to make the entire disposable diaper as thin and compact as possible. Various types of super absorbent polymer materials are commercially available, including polyacrylic acid, starch, and carboxymethyl cellulose, all of which can be used, but conventionally available disposable diapers do not have high absorbency. A water-absorbing polymer substance can be used by uniformly dispersing it in cotton-like pulp, or it can be used by scattering it in a layer between cotton-like pulps, or it can be placed between water-absorbing papers to create a water-absorbing layer. It was sometimes used in between. However, this method of use has had problems such as insufficient water absorption performance despite the use of a large amount of expensive superabsorbent polymeric material, resulting in an increase in price. [Object of the Invention] An object of the present invention is to solve the above-mentioned problems of conventional disposable diapers and to provide an inexpensive disposable diaper with excellent water absorption performance. [Structure of the Invention] The present invention comprises a first water absorption layer 3 made of cotton-like pulp that forms an upper layer between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a cotton-like pulp that forms a lower layer. It has a second water absorption layer 6 consisting of
In a disposable diaper having a super absorbent polymer powder layer between the water absorbent layer and the second water absorbent layer, the weight ratio of the second water absorbent layer 6 to the first water absorbent layer 3 is (3 weight/6 weight). A disposable diaper with a weight) of 0.25 or more and less than 0.45. That is, the disposable diaper is characterized in that the first water-absorbing layer is made thinner than the second water-absorbing layer, and the super-absorbent polymer powder is sprinkled on the second water-absorbing layer. be. The structure of the disposable diaper of the present invention is shown in FIG. In FIG. 1, reference numeral 1 indicates a liquid permeable sheet. Usually, nonwoven fabrics made of polyester, polypropylene, rayon, or the like are used, but any of them may be used. 2 is water-absorbing paper,
3 is a first water absorbing layer made of cotton-like pulp, and water absorbing paper 4 may be attached or not. 5 is a super absorbent polymer material, and all commercially available super absorbent polymer materials such as polyacrylic acid, starch, and carboxymethyl cellulose can be used. 6 is a second water-absorbing layer made of cotton-like pulp, 7 is water-absorbing paper, and 8 is a liquid-impermeable sheet made of polyethylene film. In addition, in the present invention, the flocculent pulp used as the first water absorption layer and the second water absorption layer is a defibrated pulp that has not been subjected to any special processing or treatment. The present inventors conducted extensive studies on the effects of changing the weights of the first water absorbent layer and the second water absorbent layer in disposable diapers having the above structure, and found that the ratio of the weight of the second water absorbent layer 6 to the first water absorbent layer 3 is 0.25 or more and less than 0.45, the other characteristics of the disposable diaper, i.e., the water absorption per unit area of the absorbent material, are It is a measure of the reversal of urine without reducing its volume. It has been found that it is possible to greatly improve the wet back value. The present invention will be explained in more detail below based on Examples. Example 1 Samples of the diaper having the structure shown in FIG. 1 were produced by changing the weights of the first water absorbent layer 3 and the second water absorbent layer 6 by changing the amount of cotton pulp. The total amount of cotton pulp used in the first water absorption layer and the second water absorption layer was 400 g/m 2 . Further, as the super absorbent polymer material, AquaSoc-CAO manufactured by Nippon Shokubai Co., Ltd. was used and added at a rate of 40 g/m 2 . The weight of the absorbent paper used is 19g/ m2 , and the weight of the top sheet is 23g/m2.
m2 polyester nonwoven fabric (manufactured by Kuraflex Co., Ltd.)
It was used. The first water absorbing layer, the second water absorbing layer and the super absorbent polymer material were assembled and then pressed. The tightness of the water absorbent material after pressing was in the range of 0.08 to 0.09 g/cm 3 . Artificial urine (0.06% urea, 0.80% sodium chloride, 0.10% magnesium sulfate, 0.06% calcium chloride, and the rest...pure water) was used for the test. The results are shown in Table 1. When the ratio of the weight of the first water absorbing layer A to the second water absorbing layer B is 0.25 or more and less than 0.45, the water absorption amount hardly changes, and the wet bag, which is a measure of urine reversion, decreases. It can be seen that the value is greatly improved.
【表】
以下、実施例で用いた各種の測定法を説明す
る。
(1) 高吸水性高分子物質の吸水量測定法。
第２図に示す装置を用いて測定した。
高吸水性高分子物質11 1.0ｇを小穴のあいた
支持板１２の上の200メツシユナイロン布１３
上におき、下面より人工尿１４と20分間接触さ
せたときに高分子物質が人工尿を吸収する量
（ｇ）を測定した。なお、第２図中１５はビユ
ーレツト、１６は空気入口、１７，１８はバル
ブである。
(2) 吸水量の測定法
５×５cmの大きさのおむつのサンプルを高吸
水性高分子物質とナイロン布の代りに小穴のあ
いた支持板上においた以外は上記(1)の方法と同
じ方法で測定した。
(3) ウエツトバツク値
10×10cmの大きさのサンプルに人工尿30mlを
添加した後表面シート上にろ紙を置き、その上
に1.0Kgの重しを乗せ５分間保持した後のろ紙
の吸水量（ｇ）を測定した。[Table] Below, various measurement methods used in the examples will be explained. (1) Method for measuring water absorption of super absorbent polymer substances. The measurement was carried out using the apparatus shown in FIG. 1.0 g of super absorbent polymer material 11 is placed on a 200 mesh nylon cloth 13 on a supporting plate 12 with small holes.
When the polymer substance was placed on top and brought into contact with artificial urine 14 from the bottom side for 20 minutes, the amount (g) of artificial urine absorbed by the polymer substance was measured. In FIG. 2, 15 is a filter, 16 is an air inlet, and 17 and 18 are valves. (2) Method for measuring water absorption Same method as in (1) above except that a 5 x 5 cm diaper sample was placed on a support plate with small holes instead of the super absorbent polymer material and nylon cloth. It was measured with (3) Wet back value After adding 30 ml of artificial urine to a sample with a size of 10 x 10 cm, place a filter paper on the top sheet, place a weight of 1.0 kg on top of it, and hold it for 5 minutes.The water absorption amount of the filter paper ( g) was measured.
第１図は本発明の紙おむつの断面概略図を示す
図、第２図は高吸水性高分子物質の吸水量を測定
するための装置の概略図を示す。
１……液透過性シート（表面シート）、２，７
……吸水紙、３……綿状パルプ（第１吸水層）、
４……吸水紙、５……高吸水性高分子物質、６…
…綿状パルプ（第２吸水層）、８……液不透過性
シート（裏面シート）、１１……高吸水性高分子
物質、１２……小穴のあいた支持板、１３……
200メツシユのナイロン布、１４……人工尿。
FIG. 1 is a diagram showing a schematic cross-sectional view of a disposable diaper of the present invention, and FIG. 2 is a diagram showing a schematic diagram of an apparatus for measuring the amount of water absorbed by a superabsorbent polymeric substance. 1...Liquid permeable sheet (surface sheet), 2, 7
... Water-absorbing paper, 3... Cotton-like pulp (first water-absorbing layer),
4...Water-absorbing paper, 5...Super absorbent polymer material, 6...
... cotton-like pulp (second water absorption layer), 8 ... liquid-impermeable sheet (back sheet), 11 ... super absorbent polymer material, 12 ... support plate with small holes, 13 ...
200 mesh nylon cloth, 14...artificial urine.
Claims (1)
面シート８の間に上層部を形成する綿状パルプか
らなる第１吸水層３と、下層部を形成する綿状パ
ルプからなる第２吸水層６を有し、且つ、第１吸
水層３と第２吸水層６の間に高吸水性高分子物質
粉体層５を有する使いすておむつにおいて、第１
吸水層３に対する第２吸水層６の重量の比が0.25
以上0.45未満であることを特徴とする使いすてお
むつ。1 A first water-absorbing layer 3 made of cotton-like pulp forming an upper layer between a liquid-permeable top sheet 1 and a liquid-impermeable back sheet 8, and a second water-absorbing layer 3 consisting of cotton-like pulp forming a lower layer. layer 6 and a superabsorbent polymer powder layer 5 between the first water absorbent layer 3 and the second water absorbent layer 6,
The weight ratio of the second water absorption layer 6 to the water absorption layer 3 is 0.25.
A disposable diaper characterized by having a value of at least 0.45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185837A JPS6245701A (en) | 1985-08-26 | 1985-08-26 | Disposable diaper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185837A JPS6245701A (en) | 1985-08-26 | 1985-08-26 | Disposable diaper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6245701A JPS6245701A (en) | 1987-02-27 |
| JPH0520104B2 true JPH0520104B2 (en) | 1993-03-18 |
Family
ID=16177744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60185837A Granted JPS6245701A (en) | 1985-08-26 | 1985-08-26 | Disposable diaper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6245701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9413683B2 (en) | 2011-06-14 | 2016-08-09 | Vmware, Inc. | Managing resources in a distributed system using dynamic clusters |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728892B2 (en) * | 1987-10-30 | 1995-04-05 | 花王株式会社 | Absorbent article |
| JP4936643B2 (en) | 2004-03-02 | 2012-05-23 | 株式会社リコー | Semiconductor device and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55142701A (en) * | 1979-04-20 | 1980-11-07 | Kao Corp | Disposable diaper |
-
1985
- 1985-08-26 JP JP60185837A patent/JPS6245701A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55142701A (en) * | 1979-04-20 | 1980-11-07 | Kao Corp | Disposable diaper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9413683B2 (en) | 2011-06-14 | 2016-08-09 | Vmware, Inc. | Managing resources in a distributed system using dynamic clusters |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6245701A (en) | 1987-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |