JPS623138Y2 - - Google Patents
Info
- Publication number
- JPS623138Y2 JPS623138Y2 JP1983081237U JP8123783U JPS623138Y2 JP S623138 Y2 JPS623138 Y2 JP S623138Y2 JP 1983081237 U JP1983081237 U JP 1983081237U JP 8123783 U JP8123783 U JP 8123783U JP S623138 Y2 JPS623138 Y2 JP S623138Y2
- Authority
- JP
- Japan
- Prior art keywords
- absorbent body
- water
- absorbing polymer
- absorbent
- sheet
- 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
Links
Description
【考案の詳細な説明】
本考案は吸収性およびドライタツチ性に優れた
吸収性物品に関する。
生理用ナプキンや紙おむつなどに用いられる吸
収性物品は、吸収体とこの吸収体の使用面側を被
う水透過性シートと、吸収体の非使用面側を被覆
して吸収物の漏れを防止する防漏シートから基本
的に構成される。そして、吸収体としては綿状パ
ルプ、薄葉紙などが用いられており、最近、２枚
の水透過性シートの間に吸水性ポリマーを挾持し
てなる吸水性ポリマーシートも使用されている。
吸水性ポリマーシートは、一般には綿状パルプ、
薄葉紙などの主吸収体の下側に用いられている。
このように吸収体の上部に綿状パルプ、薄葉紙を
使用すれば吸液時間は早いが、加圧時の逆戻り量
が多くドライタツチ性が非常に悪いという欠点が
あつた。
一方、吸水性ポリマーシートを主吸収体の上部
に配設した場合は、逆戻り量が少なくドライタツ
チ性に優れているが、吸液時間、特に断続吸液時
間が遅いという欠点があつた。
本考案は、吸収体の構成を改良することによ
り、従来は相反する特性であると考えられていた
吸液時間と逆戻り量を同時に満足する吸収性物品
を提供することを目的とする。
すなわち、本考案の吸収性物品は、少なくとも
使用面が水透過性シートで被われ、非使用面が防
漏シートで被覆され、その内部に吸収体を含む吸
収性物品において、前記吸収体として、(A)綿状パ
ルプ、薄葉紙、吸水性ポリマーシートの群から選
ばれる少なくとも一種の下部吸収体の上に、(B)吸
水性ポリマー、綿状パルプおよび熱融着性繊維ま
たは粉末を２枚の水透過性シートの間に充填し加
熱圧着してなる上部吸収体を積層した複層吸収体
が用いられ、且つ、この複層吸収体の上部吸収体
が使用面側となるように配設され、前記上部吸収
体中の吸水性ポリマーが、下部吸収体側に偏在し
ていることを特徴とする。
第１図は本考案の吸収性物品を生理用ナプキン
に応用した場合の実施例を示す斜視切断図であ
り、下部吸収体１０の上に上部吸収体１２が配設
されて吸収体１１を形成し、上部吸収体１２側が
使用面となる。吸収体の非使用面側および側面に
は防漏シート１４が被い、全体が水透過性シート
１６で被包されている。
第２図は、上部吸収体１２の構成例を示す断面
図であり、吸水性ポリマー２０は一面側（１８
側）に偏在している。第２図に示した上部吸収体
は、水透過性シート上に綿状パルプと熱融着性繊
維または粉末とを混合したものを積層してその上
に吸水性ポリマーを散布させるか、あるいは、水
透過性シート上に吸水性ポリマーを散布したのち
上記混合物を積層し、ついで水透過性シートを重
ねて加熱圧着することにより得られる。この偏在
した上部吸収体は、偏在側を下部吸収体と当接し
て積層させ、第３図に吸収体１１の断面図を示す
ように、偏在側（18側）を下部吸収体１２に当接
して複層吸収体１１とすることが、吸液時間およ
び逆戻り量の点で必要である。
上部吸収体１２の水透過性シート１８，１８′
としては、不織布、薄葉紙などが用いられ、坪量
８〜50ｇ／m2のものが適当である。綿状パルプは
一般に0.06〜0.15ｇ／cm3の密度のものが用いら
れ、坪量が10〜180ｇ／m2となるように充填され
る。熱融着性繊維または粉末としては融点が110
〜160℃程度のものが適当であり、たとえばポリ
エチレン粉末などが例示される。熱融着性繊維ま
たは粉末は綿状パルプの５〜50wt％の量で充填
するのが適当である。吸水性ポリマーは坪量５〜
50ｇ／m2となるように充填するのが適当であり、
一般的には粒度20〜80メツシユのものが用いられ
る。吸水性ポリマーの具体例としては、アクリル
酸重合体ナトリウム塩、澱粉−アクリルグラフト
共重合体、アクリル酸エステル重合体、澱粉−ア
クリルアミドアクリル酸ナトリウム共重合体、交
差結合ナトリウムカルボキシメチルセルロース、
ナトリウムカルボキシメチルセルロース、ナトリ
ウムカルボキシメチルセルロースなどのカルボキ
シル基を有する吸水性重合体が例示できる。
このようにして上部吸収体は通常１〜５mm程度
の厚さに形成される。
下部吸収体１０は、綿状パルプ、薄葉紙または
吸水性ポリマーシート単独であるいはこれらを併
用して構成され、厚さ１〜10mm程度に積層するの
が適当である。
水透過性シート１６および防漏シート１４とし
ては従来から知られているものがいずれも用いら
れ、水透過性シートとしては不織布などが、ま
た、防漏シートとしてはサイズ加工をした防水
紙、ポリエチレンラミネート紙、ポリビニルアル
コールなどの合成樹脂フイルムなどが用いられ
る。また、吸収体を防漏シートと水透過性シート
とで別途被覆する代りに、特開昭55−91354号公
報や実開昭48−97994号公報に記載されているよ
うに、透過面を残して水透過性シートをポリエチ
レンフイルムなどの水不透性材料で被覆した複合
シートで、水透過性シートの透過面が吸収体の吸
収面（使用面）に当接するように吸収体を被包し
てもよい。
本考案の吸収性物品によれば、従来の吸収体の
上に、吸水性ポリマー、綿状パルプおよび熱融着
性材料を含む吸収体を積層することにより、吸液
時間と逆戻り量の双方の要求を満足することがで
きる。
実験例
２枚の24ｇ／m2の薄葉紙の間に吸水性ポリマー
を30ｇ／m2で挾持した吸水性ポリマーシートの上
に坪量19ｇ／m2の薄葉紙５枚を重ね、さらにその
上に密度0.06ｇ／cm3、坪量180ｇ／m2の綿状パル
プを重ね、最後に薄葉紙（15ｇ／m2）を重ねて下
部吸収体とした。
坪量15ｇ／m2の２枚の薄葉紙の間に、綿状パル
プ（坪量：188ｇ／m2、密度0.06ｇ／cm3）、ポリエ
チレン粉末（12ｇ／m2）〔三井石油化学製Swp〕
および吸水性ポリマー（30ｇ／m2）を充填し、加
熱圧着して２mm厚の上部吸収体を得た。この際、
ポリマーを均一に分散させたものと一面側に偏在
したものを作製した。なお、以上において吸水性
ポリマーとしては、アクリル酸重合体ナトリウム
塩を用いた。
これらの吸収体を用いて以下のように吸収体を
構成し、さらにその上にレーヨン綿層を設け、透
過面を残してポリエチレンフイルムをラミネート
した複合シートで生理用ナプキンを作成し、これ
らについて吸液時間および逆戻り量を試験し、結
果を第１表に示した。
(1) 比較例１
下部吸収体のみ。
(2) 比較例２
下部吸収体の上に、吸水性ポリマーシートを
配設した。
(3) 比較例３
下部吸収体の上に、ポリマーを均一に分散さ
せた上部吸収体を重ねた。
(4) 比較例４
下部吸収体の上に、ポリマーを偏在させた上
部吸収体を、偏在側が上方にくるように重ね
た。
(5) 本考案品１
下部吸収体の上に、ポリマーを偏在させた上
部吸収体を、偏在側が下方にきて下部吸収体と
当接するように重ねた。
断続吸液時間
水平においたナプキン上に、中央に孔があり、
この孔の部分には内径23.8mmの円筒が接合されて
いる鉄板をのせ、ナプキンに８ｇ／cm2の圧力がか
かるようにする。ついで、円筒に模擬経血２mlを
注入してナプキンに吸収させ、２分間放置後同様
に２mlをナプキンに吸収させ、さらに２分後に６
mlを注入し、この注入時から液がすべてナプキン
に吸収されるまでの時間を断続吸収時間とする。
吸液時間
模擬経血10mlを一気に注入する他は上記と同様
にして吸収時間を測定する。
逆戻り量
上記の吸液時間の測定に供したナプキンの上
に、薄葉紙20枚を２分後に重ね、その上から均一
に50ｇ／cm2の圧力をかけて２分間放置し、その後
吸水紙側に逆戻りした液量を測定する。
【表】[Detailed Description of the Invention] The present invention relates to an absorbent article with excellent absorbency and dry touch properties. Absorbent articles used in sanitary napkins, disposable diapers, etc. consist of an absorbent body, a water-permeable sheet that covers the used side of the absorbent body, and a water-permeable sheet that covers the unused side of the absorbent body to prevent leakage of absorbent material. It basically consists of a leak-proof sheet. Cotton pulp, thin paper, and the like are used as the absorbent material, and recently, water-absorbing polymer sheets in which a water-absorbing polymer is sandwiched between two water-permeable sheets have also been used.
Water-absorbing polymer sheets are generally made of cotton pulp,
It is used under the main absorbent material such as tissue paper.
If cotton-like pulp or tissue paper is used in the upper part of the absorbent body, the liquid absorption time is quick, but there is a drawback that there is a large amount of backflow when pressurized, and the dry touch property is very poor. On the other hand, when a water-absorbing polymer sheet is disposed on the upper part of the main absorbent body, the amount of reversion is small and the dry touch property is excellent, but the liquid absorption time, especially the intermittent liquid absorption time, is slow. An object of the present invention is to provide an absorbent article that simultaneously satisfies the absorption time and the amount of liquid reversion, which were conventionally thought to be contradictory characteristics, by improving the structure of the absorbent body. That is, the absorbent article of the present invention is an absorbent article in which at least the used surface is covered with a water-permeable sheet, the unused surface is covered with a leak-proof sheet, and includes an absorbent body inside the absorbent article, as the absorbent body. (A) At least one type of lower absorbent body selected from the group of cotton pulp, tissue paper, and water-absorbing polymer sheets, and (B) two sheets of water-absorbing polymer, cotton pulp, and heat-fusible fibers or powder. A multi-layer absorbent body is used in which an upper absorbent body is stacked between water-permeable sheets and heat-pressed, and the upper absorbent body of this multi-layer absorbent body is placed on the use side. , the water-absorbing polymer in the upper absorbent body is unevenly distributed on the lower absorbent body side. FIG. 1 is a perspective cutaway view showing an embodiment in which the absorbent article of the present invention is applied to a sanitary napkin, in which an upper absorbent body 12 is disposed on a lower absorbent body 10 to form an absorbent body 11. However, the upper absorbent body 12 side becomes the use surface. A leak-proof sheet 14 covers the unused side and side surfaces of the absorbent body, and the entire absorbent body is covered with a water-permeable sheet 16. FIG. 2 is a cross-sectional view showing an example of the structure of the upper absorbent body 12, in which the water-absorbing polymer 20 is placed on one side (18
It is unevenly distributed on the side). The upper absorbent body shown in FIG. 2 is produced by laminating a mixture of cotton pulp and heat-fusible fibers or powder on a water-permeable sheet, and then sprinkling a water-absorbing polymer on top of the mixture. It can be obtained by spraying a water-absorbing polymer on a water-permeable sheet, then laminating the above mixture, and then stacking the water-permeable sheets and heat-pressing them. This unevenly distributed upper absorbent core is laminated with the unevenly distributed side in contact with the lower absorbent core, and as shown in the cross-sectional view of the absorbent core 11 in FIG. 3, the unevenly distributed side (18 side) is in contact with the lower absorbent core 12. It is necessary to form a multi-layer absorbent body 11 by using a multi-layer absorbent body 11 in terms of liquid absorption time and amount of return. Water permeable sheets 18, 18' of upper absorbent body 12
As the material, non-woven fabric, thin paper, etc. are used, and those having a basis weight of 8 to 50 g/m 2 are suitable. The flocculent pulp generally has a density of 0.06 to 0.15 g/cm 3 and is packed to have a basis weight of 10 to 180 g/m 2 . As a heat-fusible fiber or powder, the melting point is 110
A temperature of about 160°C is suitable, such as polyethylene powder. The heat-fusible fiber or powder is suitably filled in an amount of 5 to 50 wt% of the cotton pulp. Water-absorbing polymer has a basis weight of 5~
It is appropriate to fill it to 50g/ m2 ,
Generally, particles with a particle size of 20 to 80 mesh are used. Specific examples of water-absorbing polymers include acrylic acid polymer sodium salt, starch-acrylic graft copolymer, acrylic ester polymer, starch-acrylamide sodium acrylate copolymer, cross-linked sodium carboxymethyl cellulose,
Examples include water-absorbing polymers having carboxyl groups such as sodium carboxymethyl cellulose and sodium carboxymethyl cellulose. In this way, the upper absorbent body is usually formed to have a thickness of about 1 to 5 mm. The lower absorbent body 10 is made of cotton-like pulp, tissue paper, or a water-absorbing polymer sheet alone or in combination, and is suitably laminated to a thickness of about 1 to 10 mm. As the water-permeable sheet 16 and the leak-proof sheet 14, conventionally known materials are used.The water-permeable sheet is made of nonwoven fabric, and the leak-proof sheet is made of sized waterproof paper, polyethylene, etc. Laminated paper, synthetic resin film such as polyvinyl alcohol, etc. are used. In addition, instead of separately covering the absorber with a leak-proof sheet and a water-permeable sheet, a transparent surface may be left as described in Japanese Patent Application Laid-open No. 55-91354 and Japanese Utility Model Application No. 48-97994. It is a composite sheet in which a water-permeable sheet is covered with a water-impermeable material such as polyethylene film, and the absorbent body is wrapped in such a way that the permeable surface of the water-permeable sheet is in contact with the absorption surface (use surface) of the absorbent body. You can. According to the absorbent article of the present invention, by layering an absorbent material containing a water-absorbing polymer, cotton-like pulp, and a heat-fusible material on top of a conventional absorbent material, both the absorption time and the amount of reversion can be reduced. can satisfy your requirements. Experimental example Five sheets of thin paper with a basis weight of 19 g/m 2 are placed on top of a water-absorbing polymer sheet in which a water-absorbing polymer is sandwiched between two sheets of 24 g/m 2 thin paper at a density of 30 g/m 2 . Cotton pulp of 0.06 g/cm 3 and basis weight of 180 g/m 2 was layered, and finally, thin paper (15 g/m 2 ) was layered to form a lower absorbent body. Between two sheets of thin paper with a basis weight of 15 g/m 2 , cotton pulp (basis weight: 188 g/m 2 , density 0.06 g/cm 3 ) and polyethylene powder (12 g/m 2 ) [Swp manufactured by Mitsui Petrochemicals]
and a water-absorbing polymer (30 g/m 2 ), which was then heat-pressed to obtain an upper absorbent body with a thickness of 2 mm. On this occasion,
We prepared two types: one in which the polymer was uniformly dispersed and one in which the polymer was unevenly distributed on one side. In the above, acrylic acid polymer sodium salt was used as the water-absorbing polymer. These absorbers are used to construct an absorber as shown below, a rayon cotton layer is provided on top of the absorber, and a sanitary napkin is made from a composite sheet laminated with a polyethylene film leaving a transparent surface. The liquid time and reversion amount were tested and the results are shown in Table 1. (1) Comparative Example 1 Lower absorber only. (2) Comparative Example 2 A water-absorbing polymer sheet was placed on the lower absorbent body. (3) Comparative Example 3 An upper absorbent body in which a polymer was uniformly dispersed was placed on a lower absorbent body. (4) Comparative Example 4 The upper absorbent body in which the polymer was unevenly distributed was stacked on the lower absorbent body so that the unevenly distributed side faced upward. (5) Product 1 of the present invention The upper absorbent body in which the polymer was unevenly distributed was stacked on the lower absorbent body so that the unevenly distributed side faced downward and came into contact with the lower absorbent body. Intermittent suction time There is a hole in the center on a napkin placed horizontally.
An iron plate to which a cylinder with an inner diameter of 23.8 mm is attached is placed in the hole so that a pressure of 8 g/cm 2 is applied to the napkin. Next, 2 ml of simulated menstrual blood was injected into the cylinder and absorbed into the napkin. After leaving it for 2 minutes, 2 ml was similarly absorbed into the napkin, and after another 2 minutes, 6 ml of simulated menstrual blood was injected into the cylinder.
ml is injected, and the time from the time of injection until all the liquid is absorbed into the napkin is defined as the intermittent absorption time. Absorption time Measure the absorption time in the same manner as above, except that 10 ml of simulated menstrual blood is injected at once. Amount of backflow After 2 minutes, 20 sheets of thin paper were placed on top of the napkin used for measuring the absorption time above, and a pressure of 50 g/cm 2 was applied evenly over the napkin and left for 2 minutes. Measure the amount of liquid that has returned. 【table】
第１図は本考案の吸収性物品の実施例を示す斜
視切断図である。第２図は本考案の上部吸収体の
部分断面図である。第３図は本考案の吸収体の構
成例を示す部分断面図である。
１０……下部吸収体、１１……吸収体、１２…
…上部吸収体、１４……防漏シート、１６……水
透過性シート、１８，１８′……薄葉紙、２０…
…吸水性ポリマー、２２……綿状パルプ、２４…
…熱融着性繊維または粉末。
FIG. 1 is a perspective cutaway view showing an embodiment of the absorbent article of the present invention. FIG. 2 is a partial sectional view of the upper absorbent body of the present invention. FIG. 3 is a partial sectional view showing an example of the structure of the absorber of the present invention. 10...lower absorbent body, 11...absorbent body, 12...
... Upper absorbent body, 14 ... Leakproof sheet, 16 ... Water permeable sheet, 18, 18' ... Tissue paper, 20 ...
...Water-absorbing polymer, 22...Flot-like pulp, 24...
...Heat-fusible fiber or powder.
Claims (1)
非使用面が防漏シートで被覆され、その内部に吸
収体を含む吸収性物品において、前記吸収体とし
て、(A)綿状パルプ、薄葉紙、吸水性ポリマーシー
トの群から選ばれる少なくとも一種の下部吸収体
の上に、(B)吸水性ポリマー、綿状パルプおよび熱
融着性繊維または粉末を２枚の水透過性シートの
間に充填し加熱圧着してなる上部吸収体を積層し
た複層吸収体が用いられ、且つ、この複層吸収体
の上部吸収体が使用面側となるように配設され、
前記上部吸収体中の吸水性ポリマーが、下部吸収
体側に偏在している吸収性物品。 At least the surface to be used is covered with a water permeable sheet,
In an absorbent article whose unused surface is covered with a leak-proof sheet and which includes an absorbent body therein, the absorbent body includes (A) at least one lower portion selected from the group of cotton-like pulp, tissue paper, and a water-absorbing polymer sheet; On top of the absorbent body, (B) an upper absorbent body formed by filling water-absorbing polymer, cotton-like pulp, and heat-fusible fiber or powder between two water-permeable sheets and bonding them under heat is laminated. an absorbent body is used, and the upper absorbent body of the multilayer absorbent body is arranged on the use side,
An absorbent article in which the water-absorbing polymer in the upper absorbent core is unevenly distributed on the lower absorbent core side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8123783U JPS6061024U (en) | 1983-05-31 | 1983-05-31 | absorbent articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8123783U JPS6061024U (en) | 1983-05-31 | 1983-05-31 | absorbent articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6061024U JPS6061024U (en) | 1985-04-27 |
| JPS623138Y2 true JPS623138Y2 (en) | 1987-01-24 |
Family
ID=30211205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8123783U Granted JPS6061024U (en) | 1983-05-31 | 1983-05-31 | absorbent articles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6061024U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4573757B2 (en) * | 2004-11-30 | 2010-11-04 | 花王株式会社 | Absorbent articles |
| WO2006059525A1 (en) * | 2004-11-30 | 2006-06-08 | Kao Corporation | Absorbing sheet and absorbing article |
| JP5528022B2 (en) * | 2009-07-13 | 2014-06-25 | ユニ・チャーム株式会社 | Absorber and absorbent article |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829099B2 (en) * | 1978-04-04 | 1983-06-20 | ユニ・チャ−ム株式会社 | Body fluid treatment supplies |
| JPH019558Y2 (en) * | 1978-04-19 | 1989-03-16 | ||
| JPS5537818U (en) * | 1978-09-01 | 1980-03-11 | ||
| JPS5594251A (en) * | 1978-12-31 | 1980-07-17 | Uni Charm Corp | Article for treating body fluid |
-
1983
- 1983-05-31 JP JP8123783U patent/JPS6061024U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6061024U (en) | 1985-04-27 |
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