JP2817251B2 - Dehydration sheet and dehydration sheet bag - Google Patents
Dehydration sheet and dehydration sheet bagInfo
- Publication number
- JP2817251B2 JP2817251B2 JP1229498A JP22949889A JP2817251B2 JP 2817251 B2 JP2817251 B2 JP 2817251B2 JP 1229498 A JP1229498 A JP 1229498A JP 22949889 A JP22949889 A JP 22949889A JP 2817251 B2 JP2817251 B2 JP 2817251B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- porous thin
- film electrode
- side porous
- anode
- 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
Landscapes
- Drying Of Solid Materials (AREA)
- Drying Of Gases (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は被脱水物の水分をそのシートの界面を通し
て吸収し、除去する脱水シートに関するものである。Description: TECHNICAL FIELD The present invention relates to a dewatering sheet that absorbs and removes moisture of a material to be dehydrated through an interface of the sheet.
［従来の技術］ 紙おむつなどの衛生用品や、魚の干物、生ハム等の食
品の含有水分の調整に、吸水性高分子を含む脱水シート
が広く利用されている。第３図は従来の脱水シートの構
成を示す断面図である。被脱水物中の水分は吸水面２−
１を介して液拡散性の高い紙やパルプでできている水分
拡散層２−３に吸い取られこの層で拡散させられる。次
にその拡散させられた水分は水分貯蔵用の吸水性高分子
２−４に吸水され、水分拡散層２−３及び吸水面２−１
は再び乾燥状態に戻る。以上のようにして被脱水物から
の脱水作用が完了する。尚、第３図に示すように、防水
シート２−５が、水分拡散層２−３の表面に設けられて
いる。[Description of the Related Art] Dehydration sheets containing water-absorbing polymers are widely used for adjusting the moisture content of sanitary articles such as disposable diapers and foods such as dried fish and ham. FIG. 3 is a sectional view showing the structure of a conventional dewatering sheet. The water in the material to be dehydrated is
1 and is absorbed by a water diffusion layer 2-3 made of paper or pulp having a high liquid diffusivity and diffused in this layer. Next, the diffused water is absorbed by the water-absorbing polymer 2-4 for water storage, and the water-diffusing layer 2-3 and the water-absorbing surface 2-1 are absorbed.
Returns to a dry state again. As described above, the dehydrating action from the object to be dehydrated is completed. In addition, as shown in FIG. 3, a waterproof sheet 2-5 is provided on the surface of the moisture diffusion layer 2-3.
［発明が解決しようとする課題］ 従来の脱水シートは以上のように構成されているた
め、吸水性高分子の吸水量に限界があり、長時間連続し
て使用することができなかった。また脱水シートを再使
用する場合は、脱水シートをいったん乾燥した空間に移
し、十分に脱水を行う必要があるという問題点があっ
た。[Problems to be Solved by the Invention] Since the conventional dewatering sheet is configured as described above, the amount of water absorbed by the water-absorbing polymer is limited and cannot be used continuously for a long time. In addition, when the dewatering sheet is reused, there is a problem that the dewatering sheet needs to be once transferred to a dried space and sufficiently dewatered.
この発明はこのような問題点を解決するためになされ
たもので、脱水シートを脱水する際に乾燥した空間を必
要としない、長時間連続使用可能な脱水シートを得るこ
とを目的とする。The present invention has been made to solve such a problem, and an object of the present invention is to provide a dewatering sheet that can be used continuously for a long time without requiring a dry space when dewatering the dewatering sheet.
［課題を解決するための手段］ この発明に係る脱水シートは 直流電源に接続された陽極側多孔質薄膜状電極及び陰
極側多孔質薄膜状電極と、前記陽極側多孔質薄膜状電極
及び前記陰極側多孔質薄膜状電極に挟持された水素イオ
ン導電性固体とを有する水分除去体、及び 被脱水物の水分を吸収するための吸水性高分子と、前
記吸水性高分子及び前記水分除去体の陽極側多孔質薄膜
状電極に挟持された水分拡散層とを有する吸水体、 を具備する。[Means for Solving the Problems] A dewatering sheet according to the present invention includes an anode-side porous thin-film electrode and a cathode-side porous thin-film electrode connected to a DC power supply, and the anode-side porous thin-film electrode and the cathode. A water removing body having a hydrogen ion conductive solid sandwiched between the side porous thin film electrodes, and a water-absorbing polymer for absorbing the water of the dehydrated object, and the water-absorbing polymer and the water removing body. A water absorber having a moisture diffusion layer sandwiched between the anode-side porous thin-film electrodes.
この発明に係る脱水シート袋は 直流電源に接続された陽極側多孔質薄膜状電極及び陰
極側多孔質薄膜状電極と、前記陽極側多孔質薄膜状電極
及び前記陰極側多孔質薄膜状電極に挟持された水素イオ
ン導電性固体とを有する水分除去体、及び 被脱水物の水分を吸収するための吸水性高分子と前記
吸水性高分子及び前記水分除去体の陽極側多孔質薄膜状
電極に挟持された水分拡散層とを有する吸水体を具備す
る脱水シートとを、前記吸水性高分子を内側にして内部
に前記被脱水物を収納する袋状体としている。The dewatering sheet bag according to the present invention is sandwiched between the anode-side porous thin-film electrode and the cathode-side porous thin-film electrode connected to a DC power supply, and between the anode-side porous thin-film electrode and the cathode-side porous thin-film electrode. And a water-absorbing polymer for absorbing the water of the object to be dehydrated, and sandwiched between the water-absorbing polymer and the anode-side porous thin-film electrode of the water-removing body. And a dewatering sheet having a water-absorbing body having a moisture diffusion layer formed therein, wherein the water-absorbing polymer is on the inside and the dewatering object is accommodated therein.
［作用］ 吸水体の吸水性高分子中に吸収された水分は、水分除
去体により電気分解されて、陽極側多孔質薄膜状電極に
酸素、陰極側多孔質薄膜状電極に水素又は水分を発生す
る。[Operation] The water absorbed in the water-absorbing polymer of the water-absorbing body is electrolyzed by the water remover to generate oxygen on the anode-side porous thin-film electrode and hydrogen or moisture on the cathode-side porous thin-film electrode. I do.
［実施例］ 以下この発明の一実施例を図を用いて説明する。第１
図は本発明の脱水シートの構成を示す断面図である。又
第２図は第１図に示した脱水シート１を袋状にし、内部
に被脱水物４を収容した状態を示す断面図である。Embodiment One embodiment of the present invention will be described below with reference to the drawings. First
The figure is a cross-sectional view showing the structure of the dewatering sheet of the present invention. FIG. 2 is a cross-sectional view showing a state in which the dewatering sheet 1 shown in FIG.
被脱水物４の水分は吸水面２−１を介して吸水体２に
吸収されて行く。まずフィルタ２−２で水分中の夾雑物
（ゴミ等）は取り除かれる。次に液拡散性の高いパルプ
で構成される水分拡散層２−３を通って、例えばポリア
クリル酸ソーダが含まれる吸水性高分子２−４に吸収さ
れる。The water of the object to be dehydrated 4 is absorbed by the water absorbing body 2 via the water absorbing surface 2-1. First, impurities (dust and the like) in water are removed by the filter 2-2. Next, it is absorbed by the water-absorbing polymer 2-4 containing, for example, sodium polyacrylate, through the water diffusion layer 2-3 made of pulp having high liquid diffusivity.
水分除去体３の陽極側多孔質薄膜状電極３−1aは例え
ば３μｍ厚の白金等により1.5V〜3V程度のプラス電圧が
印加されている。そのためこの陽極側多孔質薄膜状電極
３−1aと水分拡散層２−３の界面で水分拡散層２−３中
の水分は水分除去体３によって分解される。すなわち陽
極側多孔質薄膜状電極３−1a上の水分は の反応により水素イオン、酸素及び電子に分解される。A positive voltage of about 1.5 V to 3 V is applied to the anode-side porous thin-film electrode 3-1a of the water removing body 3 by, for example, platinum having a thickness of 3 μm. Therefore, the moisture in the moisture diffusion layer 2-3 is decomposed by the moisture remover 3 at the interface between the anode-side porous thin-film electrode 3-1a and the moisture diffusion layer 2-3. That is, the moisture on the anode-side porous thin-film electrode 3-1a is Decomposes into hydrogen ions, oxygen and electrons.
生じた水素イオンは例えば200μｍ厚のNAFION117（デ
ュポン社の商標）等による水素イオン導電性固体３−２
中を移動し対向している陽極側多孔質薄膜状電極３−1a
と同様に形成されている陰極側多孔質薄膜状電極３−2b
に達する。そこでは下記の（２）式と（３）式との反応
により水素イオンは水もしくは水素に変換される。The generated hydrogen ions are, for example, a hydrogen ion conductive solid 3-2 made of NAFION117 (trademark of DuPont) having a thickness of 200 μm.
Anode-side porous thin-film electrode 3-1a moving inside and facing
The cathode-side porous thin-film electrode 3-2b formed similarly to
Reach There, hydrogen ions are converted into water or hydrogen by the reaction of the following equations (2) and (3).
ここで（３）の反応は電流がある程度大きいとき起り
始める。反応式（２）中の酸素は空気中の又は水分中の
溶存酸素である。又反応式（１）で生じた酸素は陽極側
多孔質薄膜状電極３−1a上で発生後、吸水体２中を通っ
て外部に放出される。又同じく反応式（１）で生じた電
子は陽極側多孔質薄膜状電極３−1aからリード線３−３
を通って直流電源３−４を経て、陰極側多孔質薄膜状電
極３−2bへと移動する。そこで反応式（２）又は（３）
の反応に必要な電子して供給されることになる。尚、実
験によれば陰極側多孔質薄膜状電極３−2b上の電流密度
を一定の値、例えば本実施例では15mA/cm2以下におさえ
た場合、危険なH2ガスを発生させる反応式（３）の反応
が起こらないことが確認されている。又、酸素を十分供
給することによっても反応式（３）の反応が起こりにく
くなることも確認されている。 Here, the reaction (3) starts to occur when the current is large to some extent. The oxygen in the reaction formula (2) is dissolved oxygen in air or water. Oxygen generated by the reaction formula (1) is generated on the anode-side porous thin-film electrode 3-1a and then released to the outside through the water absorber 2. Similarly, electrons generated in the reaction formula (1) are transferred from the anode side porous thin film electrode 3-1a to the lead wire 3-3
Through the DC power supply 3-4 to the porous thin-film electrode 3-2b on the cathode side. Then, the reaction formula (2) or (3)
The electrons required for the reaction are supplied. According to the experiment, when the current density on the cathode-side porous thin-film electrode 3-2b is kept at a constant value, for example, 15 mA / cm 2 or less in the present embodiment, a reaction formula for generating a dangerous H 2 gas is obtained. It has been confirmed that the reaction (3) does not occur. It has also been confirmed that the reaction of the reaction formula (3) hardly occurs even when oxygen is sufficiently supplied.
以上のようにして吸水体２中の水分拡散層２−３に含
まれる水分は水分除去体３によって分解除去される。そ
のため水分拡散層２−３の水分含有率は低下する。それ
にともない吸水性高分子２−４に吸水されていた水分も
水分拡散層２−３中に移動し、前述したように分解除去
されることになる。このようにして脱水シートの脱水作
用の原動力となる吸水性高分子２−４の水分吸水能力が
水分除去体３の電気分解作用によって連続的に再生され
る。As described above, the water contained in the water diffusion layer 2-3 in the water absorber 2 is decomposed and removed by the water remover 3. Therefore, the moisture content of the moisture diffusion layer 2-3 decreases. Accordingly, the water absorbed by the water absorbing polymer 2-4 also moves into the water diffusion layer 2-3 and is decomposed and removed as described above. In this way, the water absorbing ability of the water-absorbing polymer 2-4, which is the driving force of the dewatering action of the dewatering sheet, is continuously regenerated by the electrolysis action of the water removing body 3.
上記実施例では吸水性高分子２−４としてポリアクリ
ル酸ソーダを用いた場合を示したが、ポリビニルアルコ
ール系化合物、ポリエチレンオキサイド変成物等、吸水
性高分子であれば同様の機能を発理することはいうまで
もない。In the above embodiment, the case where sodium polyacrylate was used as the water-absorbing polymer 2-4 was described. However, the same function is applied to any water-absorbing polymer such as a polyvinyl alcohol-based compound and a modified polyethylene oxide. Needless to say.
上記実施例では水素イオン導電性固体３−２として固
体高分子電解質であるNAFION箔を用いた例を示したが、
これに限ることなく、βアルミナ置換体のような無機の
水素イオン導電性固体を保持したアルミナペーパー等、
無機、有機いずれの物質であっても水素イオン導電性固
体であれば同様の効果を期待できる、ことはいうまでも
ない。In the above embodiment, an example in which NAFION foil which is a solid polymer electrolyte is used as the hydrogen ion conductive solid 3-2,
Without being limited to this, alumina paper holding an inorganic hydrogen ion conductive solid such as β-alumina substitute, etc.
It goes without saying that the same effect can be expected for both inorganic and organic substances as long as they are hydrogen ion conductive solids.
この脱水シートを適用すれば紙おむつをはじめ、冷凍
破壊を防ぐための生鮮食品の鮮度保持用の吸水シート等
において、従来繰り返し使用に限界のあったシートの使
用回数の向上、使用時間の長時間化、高吸水（脱水）速
度の維持等に大幅な改善をもたらす。If this dewatering sheet is used, in paper diapers and other water-absorbing sheets for keeping freshness of fresh foods to prevent freezing and destruction, the number of times of use of sheets, which had been limited to repeated use in the past, can be increased, and the use time can be extended. It greatly improves the maintenance of a high water absorption (dehydration) rate.
［発明の効果］ 以上にようにこの発明によれば、脱水シート中の吸水
体の吸水性高分子中に吸収された水分が水分除去体によ
り電気分解され、陽極側多孔質薄膜状電極に酸素、陰極
側多孔質薄膜状電極に水素又は水分を発生することによ
り除去される。そのため脱水シートを長時間連続使用可
能とし、容易にその脱水能力を回復可能とする効果があ
る。[Effect of the Invention] As described above, according to the present invention, the water absorbed in the water-absorbing polymer of the water-absorbing body in the dewatering sheet is electrolyzed by the water-removing body, and oxygen is applied to the anode-side porous thin-film electrode. Is removed by generating hydrogen or moisture on the cathode side porous thin film electrode. Therefore, there is an effect that the dewatering sheet can be used continuously for a long time, and the dewatering ability can be easily recovered.
第１図はこの発明の脱水シートの構成を示す断面図、第
２図は第１図に示した脱水シートを袋状にして、内部に
被脱水物を収容した状態の断面図、第３図は従来の脱水
シートの構成を示す断面図である。 図中１は脱水シート、２は吸水体、２−４は吸水性高分
子、３は水分除去体、３−1aは陽極側多孔質薄膜状電
極、３−1bは陰極側多孔質薄膜状電極、３−２は水素イ
オン導電性固体、３−４は直流電源である。FIG. 1 is a cross-sectional view showing the structure of the dewatering sheet of the present invention, FIG. 2 is a cross-sectional view showing a state in which the dewatering sheet shown in FIG. FIG. 3 is a cross-sectional view illustrating a configuration of a conventional dewatering sheet. In the figure, 1 is a dewatering sheet, 2 is a water-absorbing body, 2-4 is a water-absorbing polymer, 3 is a water removing body, 3-1a is an anode-side porous thin-film electrode, and 3-1b is a cathode-side porous thin-film electrode. Reference numeral 3-2 denotes a hydrogen ion conductive solid, and reference numeral 3-4 denotes a DC power supply.
Claims (2)
電極及び陰極側多孔質薄膜状電極と、前記陽極側多孔質
薄膜状電極及び前記陰極側多孔質薄膜状電極に挟持され
た水素イオン導電性固体とを有する水分除去体、及び 被脱水物の水分を吸収するための吸水性高分子と、前記
吸水性高分子及び前記水分除去体の陽極側多孔質薄膜状
電極に挟持された水分拡散層とを有する吸水体、 を具備する脱水シート。An anode-side porous thin-film electrode and a cathode-side porous thin-film electrode connected to a DC power supply, and hydrogen sandwiched between the anode-side porous thin-film electrode and the cathode-side porous thin-film electrode. A water-removing body having an ion-conductive solid, a water-absorbing polymer for absorbing the water of the dehydrated object, and the water-absorbing polymer and the water-removing body sandwiched between the anode-side porous thin-film electrodes; A dewatering sheet comprising: a water-absorbing body having a moisture diffusion layer.
電極及び陰極側多孔質薄膜状電極と、前記陽極側多孔質
薄膜状電極及び前記陰極側多孔質薄膜状電極に挟持され
た水素イオン導電性固体とを有する水分除去体、及び 被脱水物の水分を吸収するための吸水性高分子と前記吸
水性高分子及び前記水分除去体の陽極側多孔質薄膜状電
極に挟持された水分拡散層とを有する吸水体を具備する
脱水シートとを、前記吸水性高分子を内側にして内部に
前記被脱水物を収納する袋状体とした脱水シート袋。2. An anode-side porous thin-film electrode and a cathode-side porous thin-film electrode connected to a DC power supply, and hydrogen sandwiched between the anode-side porous thin-film electrode and the cathode-side porous thin-film electrode. A water-removing body having an ion-conductive solid, and a water-absorbing polymer for absorbing water of a dehydrated object, and water held between the water-absorbing polymer and the anode-side porous thin-film electrode of the water-removing body. A dewatering sheet provided with a water-absorbing body having a diffusion layer; and a dewatering sheet bag in which the water-absorbing polymer is on the inside and the dewatering object is stored inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1229498A JP2817251B2 (en) | 1989-09-05 | 1989-09-05 | Dehydration sheet and dehydration sheet bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1229498A JP2817251B2 (en) | 1989-09-05 | 1989-09-05 | Dehydration sheet and dehydration sheet bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0391688A JPH0391688A (en) | 1991-04-17 |
| JP2817251B2 true JP2817251B2 (en) | 1998-10-30 |
Family
ID=16893115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1229498A Expired - Fee Related JP2817251B2 (en) | 1989-09-05 | 1989-09-05 | Dehydration sheet and dehydration sheet bag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2817251B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2454305A1 (en) | 2002-04-24 | 2003-11-06 | Nisshinbo Industries, Inc. | Ionic liquid and method of dehydration thereof, electrical double-layer capacitor, and secondary cell |
-
1989
- 1989-09-05 JP JP1229498A patent/JP2817251B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0391688A (en) | 1991-04-17 |
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