JPH06207107A - Water-absorbing polymer sol - Google Patents
Water-absorbing polymer solInfo
- Publication number
- JPH06207107A JPH06207107A JP1804293A JP1804293A JPH06207107A JP H06207107 A JPH06207107 A JP H06207107A JP 1804293 A JP1804293 A JP 1804293A JP 1804293 A JP1804293 A JP 1804293A JP H06207107 A JPH06207107 A JP H06207107A
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbing
- absorbent polymer
- absorbing polymer
- polymer
- 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.)
- Pending
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は吸水性不織布等に用いら
れる吸水性ポリマーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water absorbent polymer used for a water absorbent nonwoven fabric and the like.
【０００２】[0002]
【従来の技術】吸水性に優れた不織布は既に市販されて
いる。その多くは乾式不織布である。吸水性を向上する
ために吸水ポリマーを乾式不織布中に保持させている。
その多くは多層構造とし、吸水ポリマーをサンドイッチ
したものが多い。2. Description of the Related Art Nonwoven fabrics having excellent water absorption are already on the market. Most of them are dry non-woven fabrics. A water-absorbent polymer is held in the dry non-woven fabric to improve water absorption.
Most of them have a multi-layered structure and sandwich a water-absorbing polymer.
【０００３】吸水ポリマーは吸湿するものが多く、乾燥
しておかないと凝集してしまうため通常は乾燥状態で用
いられ、吸水ポリマーを散布しながら積層する方法が多
く採られている。吸水ポリマーをサンドイッチするのは
吸水ポリマーが脱落しないためである。Many water-absorbing polymers absorb moisture, and if they are not dried, they agglomerate. Therefore, they are usually used in a dry state, and a method of laminating the water-absorbing polymers while laminating them is often adopted. The water absorbing polymer is sandwiched because the water absorbing polymer does not fall off.
【０００４】一方、湿式不織布に吸水ポリマーを混抄す
る場合、一般の吸水ポリマーは大きさが大きいものは直
径が０．５から２．０ｍｍもあるため、吸水ポリマーが
抄紙時、約１００から１０００倍に膨潤し、その直径が
数ｍｍにまで達してしまう欠点があり、抄紙時に他の繊
維を排除し、抄紙後乾燥した時点で脱落してしまう欠点
がある。また吸水ポリマーの混抄率が大きくなると湿式
不織布の強力を低下させる欠点がある。On the other hand, when a water-absorbent polymer is mixed with a wet-laid nonwoven fabric, a general water-absorbent polymer having a large size has a diameter of 0.5 to 2.0 mm. It has a drawback that it swells up to a diameter of several mm, and other fibers are eliminated during papermaking and fall off when it is dried after papermaking. Further, when the mixing ratio of the water-absorbent polymer becomes large, there is a drawback that the strength of the wet non-woven fabric is lowered.
【０００５】また、特開昭６１−５５２０２号公報には
重合前のモノマーを不織布に含浸させ、吸水性ポリマー
を重合する方法が記載されているが、装置が複雑になる
ため、初期投資が大きくなり、コストアップとなる。Further, Japanese Unexamined Patent Publication No. 61-55202 discloses a method of impregnating a non-woven fabric with a non-woven fabric to polymerize a water-absorbing polymer, but since the apparatus becomes complicated, the initial investment is large. Therefore, the cost will increase.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は取り扱
い易い、安定性に優れた微粒子吸水性ポリマーゾルを提
供するにある。An object of the present invention is to provide a fine particle water-absorbing polymer sol which is easy to handle and is excellent in stability.
【０００７】[0007]
【課題を解決するための手段】本発明者らは吸水性ポリ
マーを固定する方法を研究した結果、本発明の完成に至
った。The present inventors have completed the present invention as a result of researching a method for fixing a water-absorbing polymer.
【０００８】本発明の吸水性ポリマーゾルは、吸水性ポ
リマー微粒子を０．１重量％以上含有することを特徴と
する。The water-absorbent polymer sol of the present invention is characterized by containing water-absorbent polymer fine particles in an amount of 0.1% by weight or more.
【０００９】本発明に用いる吸水ポリマーは一般に市販
されている吸水ポリマーでよい。例えばポリアクリル酸
ナトリウム塩系、グラフト重合したでんぷん系等があ
る。しかし、これのみに限定するものではない。The water absorbing polymer used in the present invention may be a water absorbing polymer which is generally commercially available. For example, polyacrylic acid sodium salt type, graft-polymerized starch type and the like are available. However, the present invention is not limited to this.
【００１０】これらの市販の吸水ポリマーは粒径のバラ
ツキが大きく、大きいものは粒径が１ｍｍ近くの大きさ
がある。純水を吸水して、膨潤するとこれらの吸水ポリ
マーは直径が約１０倍にもなり、水に分散してもすぐに
沈澱してしまう。These commercially available water-absorbing polymers have a large variation in particle size, and a large one has a particle size of about 1 mm. When pure water is absorbed and swells, these water-absorbing polymers have a diameter of about 10 times, and even if dispersed in water, they precipitate immediately.
【００１１】吸水ポリマーをそのまま粉砕して粒径を小
さくしても、水に分散したときに凝集し、大きな塊とな
ってしまう。また、乾燥した状態で粉砕すると表面積が
大きくなるため吸湿しやすくなり、保管時に凝集してし
まい、取扱いが面倒になる。Even if the water-absorbent polymer is pulverized as it is to reduce the particle size, it aggregates when dispersed in water to form a large lump. Further, when pulverized in a dry state, the surface area becomes large, so that it easily absorbs moisture and agglomerates during storage, resulting in troublesome handling.
【００１２】本発明はこれらの吸水ポリマーを水中で膨
潤した状態で粉砕し、凝集する事なく均一に分散させる
ものである。本発明の吸水ポリマーゾルは、吸水ポリマ
ーの平均直径が乾燥時で好ましくは５０μｍ以下であ
る。更に好ましくは３０μｍ以下である。５０μｍを越
えるとゾルの安定性が低下する。また、吸水性ポリマー
の平均直径が小さいほど表面積が大きくなり、吸水速度
が速くなる。In the present invention, these water-absorbing polymers are swelled in water and pulverized so that they are uniformly dispersed without agglomeration. In the water-absorbing polymer sol of the present invention, the average diameter of the water-absorbing polymer is preferably 50 μm or less when dried. More preferably, it is 30 μm or less. If it exceeds 50 μm, the stability of the sol decreases. In addition, the smaller the average diameter of the water-absorbent polymer, the larger the surface area and the faster the water absorption rate.
【００１３】凝集せずに分散している状態であると粘性
の高い水溶液、例えば血液等の吸水に適している。本発
明の吸水性ポリマーの濃度は０．１重量％以上である。
０．１重量％未満の場合は、コストアップになり好まし
くない。吸水性ポリマーの濃度は用途により異なる。濃
度が高くなると粘度が大きくなるので、適当な範囲で用
いる。When dispersed without agglomeration, it is suitable for absorbing highly viscous aqueous solution, such as blood. The concentration of the water absorbing polymer of the present invention is 0.1% by weight or more.
If it is less than 0.1% by weight, the cost is increased, which is not preferable. The concentration of the water-absorbing polymer depends on the application. The higher the concentration, the higher the viscosity, so use it in an appropriate range.
【００１４】本発明の吸水性ポリマーゾルの溶媒は通
常、水を用いる。溶媒には親水性の有機物、例えばメチ
ルアルコール，エチルアルコール，イソプロピルアルコ
ール，アセトン，エチレングリコール，グリセリン等を
混和してもよい。また、例えば塩化ナトリウム，塩化カ
ルシウム等の塩類を混和してもよい。親水性の有機物、
例えばエチルアルコール，アセトン等や塩類を混和する
と吸水性ポリマーの膨潤が抑制され、見かけ粘度が低く
なり、吸水性ポリマーゾルの濃度を向上することが出来
る。Water is usually used as the solvent for the water-absorbent polymer sol of the present invention. A hydrophilic organic substance such as methyl alcohol, ethyl alcohol, isopropyl alcohol, acetone, ethylene glycol or glycerin may be mixed in the solvent. Further, salts such as sodium chloride and calcium chloride may be mixed. Hydrophilic organic matter,
For example, when ethyl alcohol, acetone or the like or a salt is mixed, swelling of the water-absorbent polymer is suppressed, the apparent viscosity is lowered, and the concentration of the water-absorbent polymer sol can be improved.
【００１５】また、水は少なくとも吸水ポリマーと等量
以上ある方がよい。例えば水とエチルアルコールの混合
溶液を溶媒として用いた場合、吸水性ポリマーはエチル
アルコールの濃度が高いほど膨潤しないため濃度を向上
することが出来る。しかし、吸水性ポリマーゾルを塗布
し乾燥する際に、吸水性ポリマーが接着すると吸水性ポ
リマーが脱落しなくなり、好ましい。吸水性ポリマーが
接着するようになるには吸水性ポリマーが膨潤している
必要がある。吸水性ポリマーが接着性を持つためには少
なくとも等量の水が存在することが好ましい。例えば吸
水性ポリマー１重量％に水１重量％、エチルアルコール
９８重量％であれば、乾燥時エチルアルコールが先に蒸
発するため水の濃度が徐々に高くなり、吸水性ポリマー
が膨潤し、接着性を持つようになる。接着性を持つと吸
水性ポリマーの分散状態が維持され、吸水速度の向上、
粘性水溶液の吸水性の向上が発揮される。Further, it is preferable that the amount of water is at least equal to or more than that of the water absorbing polymer. For example, when a mixed solution of water and ethyl alcohol is used as a solvent, the concentration of the water-absorbent polymer can be improved because the higher the concentration of ethyl alcohol is, the less it swells. However, when the water-absorbent polymer is applied and dried, if the water-absorbent polymer adheres, the water-absorbent polymer does not fall off, which is preferable. In order for the water-absorbent polymer to adhere, the water-absorbent polymer needs to be swollen. It is preferable that at least an equal amount of water is present for the water-absorbent polymer to have adhesiveness. For example, if 1% by weight of water-absorbing polymer, 1% by weight of water and 98% by weight of ethyl alcohol, ethyl alcohol evaporates first during drying, so that the concentration of water gradually increases, the water-absorbing polymer swells, and the adhesive property increases. To have. When it has adhesiveness, the dispersed state of the water-absorbent polymer is maintained and the water absorption rate is improved.
The water absorption of the viscous aqueous solution is improved.
【００１６】塩類を同様の目的に用いる場合は例えば抄
紙に用いるように、使用時に水で希釈される用途に適し
ている。吸水性ポリマーゾルに用いられた塩類はこの場
合、希釈され大半が除去されてしまう。塩類としては塩
化ナトリウムのような１価の塩と、塩化カルシウムのよ
うな２価の塩があるが、吸水性ポリマーの膨潤性は２価
の塩の方が抑制効果が大きい。When the salt is used for the same purpose, it is suitable for use where it is diluted with water at the time of use, for example, for papermaking. In this case, the salts used in the water-absorbent polymer sol are diluted and most of them are removed. As the salts, there are monovalent salts such as sodium chloride and divalent salts such as calcium chloride, but the divalent salt has a greater inhibitory effect on the swelling property of the water-absorbing polymer.
【００１７】吸水性ポリマーの溶媒中での粉砕には刃を
付けたミキサー等を用いることができる。粉砕に際して
は吸水性ポリマーを膨潤状態にし、粉砕するが、吸水性
ポリマーの濃度を高くした方が粉砕効率がよい。A mixer equipped with a blade can be used to grind the water-absorbent polymer in the solvent. At the time of pulverization, the water-absorbent polymer is swollen and then pulverized. The higher the concentration of the water-absorbent polymer, the better the pulverization efficiency.
【００１８】また、吸水性ポリマーの粉砕に際し、同時
にパルプ等の叩解、混合や、分散剤，界面活性剤，防腐
剤，抗菌剤，抗カビ剤，防虫剤，顔料等の添加剤の混合
等をゾルの安定性を損なわない範囲で行ってもよい。When the water-absorbent polymer is pulverized, at the same time, beating and mixing of pulp or the like, mixing of dispersants, surfactants, preservatives, antibacterial agents, antifungal agents, insect repellents, additives such as pigments, etc. You may perform it in the range which does not impair the stability of sol.
【００１９】本発明の吸水性ポリマーゾルは、例えば湿
式不織布の製造の際に添加して用いてもよい。また、湿
式不織布にスプレー，コーティング，プリント等で付着
させてもよい。乾燥することにより容易に吸水ポリマー
微粒子を付着固定することが出来る。更に、乾式不織布
にも同様にして付着させることが出来る。The water-absorbent polymer sol of the present invention may be added and used, for example, in the production of a wet non-woven fabric. Further, it may be attached to the wet non-woven fabric by spraying, coating, printing or the like. By drying, the water-absorbing polymer particles can be easily attached and fixed. Further, it can be attached to a dry nonwoven fabric in the same manner.
【００２０】付着させる対象と吸水ポリマーゾルの組
成、物性は近い方がよい。すなわち親水性成分を付着さ
せる対象が含有していると接着力が強くなり好ましい。It is preferable that the composition and the physical properties of the water-absorbing polymer sol and the object to be adhered are close to each other. That is, it is preferable that the hydrophilic component is contained in the object to which the hydrophilic component adheres, because the adhesive force becomes strong.
【００２１】[0021]
【発明の効果】本発明の吸水性ポリマーゾルは微粒子の
ため表面積が大きく、粘性の高い水溶液、例えば血液等
の吸水に特に効果を示す。The water-absorbent polymer sol of the present invention has a large surface area because it is fine particles, and is particularly effective in absorbing highly viscous aqueous solutions such as blood.
【００２２】更に詳しくは実施例に説明する。実施例
中、特に断わらない限り「％」は「重量％」とする。Further details will be described in the embodiments. In the examples, "%" is "% by weight" unless otherwise specified.
【００２３】実施例１ 吸水ポリマー（三洋化成工業（株）製，サンウェット
ＩＭ−５０００Ｄ）を用い、０．５％濃度の水分散液を
家庭用電気ミキサーで５分間粉砕し、粉砕された微細吸
水ポリマーの平均粒径をＳＥＭにて５０μｍ以下になっ
ていることを確認した。常温で３日間放置したが沈降は
ほとんどなく良好な安定性を示した。また、吸水ポリマ
ー微粒子相互が凝集することもなかった。Example 1 Water-absorbing polymer (Sanyo Chemical Co., Ltd., Sunwet)
IM-5000D), 0.5% aqueous dispersion was pulverized with a household electric mixer for 5 minutes, and the average particle size of the pulverized fine water-absorbing polymer was confirmed by SEM to be 50 μm or less. did. After standing at room temperature for 3 days, there was almost no sedimentation and good stability was exhibited. In addition, the water-absorbent polymer particles did not aggregate with each other.
【００２４】粉砕時間３０秒では５０μｍを越える平均
粒径であった。常温で放置１日後、大きな微粒子の沈降
が認められた。When the crushing time was 30 seconds, the average particle size exceeded 50 μm. After 1 day of standing at room temperature, large fine particles were observed to settle.
【００２５】この吸水性ポリマーゾルを乾燥重量で１５
％を叩解したパルプと混合し、網に振動を与えつつ抄紙
した。カレンダーローラで乾燥した秤量１００ｇｒ／ｍ
2 の得られた湿式不織布の純水の吸水率は１３６０％で
あった。得られた湿式不織布の地合はよく、均一性もよ
かった。また、吸水性ポリマー微粒子はパルプとよく接
着し、脱落することもなかった。馬血の脱繊血の吸血率
は４２０％であった。This water-absorbing polymer sol was dried at a weight of 15
% Was mixed with beaten pulp and paper was made while vibrating the net. Weighing 100gr / m dried by calender roller
The water absorption rate of pure water in the obtained wet-laid nonwoven fabric of No. 2 was 1360%. The obtained wet-laid nonwoven fabric had a good texture and good uniformity. Further, the water-absorbent polymer fine particles adhered well to the pulp and did not fall off. The blood sucking rate of defibrinated horse blood was 420%.
【００２６】比較として、粉砕をせずに市販の吸水ポリ
マーをそのまま用いると、地合が悪く、均一性もよくな
かった。吸水率も８１０％であった。馬血の脱繊血の吸
血率は１２０％であった。For comparison, when a commercially available water-absorbing polymer was used as it was without crushing, the formation was poor and the uniformity was poor. The water absorption was also 810%. The blood-sucking rate for defibrillation of horse blood was 120%.
Claims (1)
上含有することを特徴とする吸水性ポリマーゾル。1. A water-absorbent polymer sol containing 0.1% by weight or more of water-absorbent polymer fine particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1804293A JPH06207107A (en) | 1993-01-09 | 1993-01-09 | Water-absorbing polymer sol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1804293A JPH06207107A (en) | 1993-01-09 | 1993-01-09 | Water-absorbing polymer sol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06207107A true JPH06207107A (en) | 1994-07-26 |
Family
ID=11960633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1804293A Pending JPH06207107A (en) | 1993-01-09 | 1993-01-09 | Water-absorbing polymer sol |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06207107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109400813A (en) * | 2018-10-23 | 2019-03-01 | 浙江金晟环保股份有限公司 | A kind of water material and preparation method thereof of sucking blood applied to buffet disk |
-
1993
- 1993-01-09 JP JP1804293A patent/JPH06207107A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109400813A (en) * | 2018-10-23 | 2019-03-01 | 浙江金晟环保股份有限公司 | A kind of water material and preparation method thereof of sucking blood applied to buffet disk |
| CN109400813B (en) * | 2018-10-23 | 2021-05-07 | 浙江金晟环保股份有限公司 | Blood-absorbing material applied to cold-dining plate and preparation method thereof |
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