JPH0254780B2 - - Google Patents
Info
- Publication number
- JPH0254780B2 JPH0254780B2 JP58245776A JP24577683A JPH0254780B2 JP H0254780 B2 JPH0254780 B2 JP H0254780B2 JP 58245776 A JP58245776 A JP 58245776A JP 24577683 A JP24577683 A JP 24577683A JP H0254780 B2 JPH0254780 B2 JP H0254780B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- cmc
- oil
- absorbing
- 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 - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 24
- 239000011347 resin Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 9
- -1 alkali metal salt Chemical class 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims 1
- 239000001768 carboxy methyl cellulose Substances 0.000 claims 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 69
- 239000003921 oil Substances 0.000 description 32
- 238000010521 absorption reaction Methods 0.000 description 16
- 239000002250 absorbent Substances 0.000 description 13
- 229920002785 Croscarmellose sodium Polymers 0.000 description 10
- 230000002745 absorbent Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000002283 diesel fuel Substances 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 240000008415 Lactuca sativa Species 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 235000012045 salad Nutrition 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000008162 cooking oil Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012354 overpressurization Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Description
【発明の詳細な説明】
本発明は、水や各種の塩水溶液を高度に吸収
し、かつ保持する複合シートに関するものであ
り、詳しくは油類など有機媒体中の水を除去する
吸水フイルターや紙おむつ、生理用品などに使用
することのできる、吸水特性と保水特性の著しく
改善された高吸収性シートに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite sheet that highly absorbs and retains water and various salt aqueous solutions, and specifically relates to a water-absorbing filter and paper diapers that remove water from organic media such as oils. The present invention relates to a superabsorbent sheet with significantly improved water absorption and water retention properties that can be used in sanitary products and the like.
今日、各種の石油系燃料や潤滑油が広く使用さ
れているが、使用時あるいは貯蔵中に大気中の水
分の凝結、その他の原因で、水が混入し、燃料や
油の品質を低下させる傾向がある。これらの混入
水は二相に分離していることもあれば、エマルジ
ヨン化していることもあり、更に一部油中に溶解
しているものもあつて、単なる傾斜や分液などの
手段では分離できないことが多い。最近各種の高
度吸水性樹脂が開発されており、これらは自重の
100倍以上の水を吸収することができるため、水
が混入している油類に添加して撹拌することによ
り水をその樹脂に吸収させて除去することができ
る。 Various petroleum-based fuels and lubricating oils are widely used today, but water tends to contaminate the fuels and oils during use or storage due to condensation of atmospheric moisture or other causes, reducing the quality of the fuels and oils. There is. These mixed waters may be separated into two phases, may be in the form of an emulsion, and some may even be partially dissolved in the oil, and cannot be separated by simple methods such as tilting or liquid separation. There are many things that cannot be done. Recently, various highly water-absorbing resins have been developed, and these
Since it can absorb 100 times more water, by adding it to oils containing water and stirring, the water can be absorbed by the resin and removed.
しかしながら、これらの高度吸水性樹脂は大部
分が粉末状あるいは顆粒状であるので、吸水処理
後、油とこれらの樹脂を分離する作業、即ち過
が必要となる。油類の過に用いるフイルター素
材そのものに高度吸水性を賦与することができれ
ば、脱水工程の合理化できると共に、莢雑物等の
除去もでき、甚だ好都合である。 However, since most of these highly water-absorbing resins are in the form of powder or granules, it is necessary to separate the oil from these resins after the water absorption treatment, that is, filtration. If the filter material itself used for filtering oils could be endowed with high water absorbency, the dehydration process could be streamlined and impurities such as pods could be removed, which would be very convenient.
また、最近生理用品や紙おむつの分野を中心に
高吸収剤入りシートが出てきている。しかし、こ
れらの殆んどのものがシートの間に粉末状あるい
は顆粒状の高吸水性樹脂をはさんだサンドイツチ
方式のものであり、現在このシートの技術的課題
は、粉末状あるいは顆粒状の高吸水性樹脂をいか
にして均一に散布し、固定化するかであり、本来
有している高吸水性、高保水性を最終製品段階に
おいて、いかにして十分に発揮させるかである。 In addition, sheets containing superabsorbent materials have recently appeared mainly in the fields of sanitary products and disposable diapers. However, most of these sheets are of the sandwich method in which powdered or granular superabsorbent resin is sandwiched between sheets, and the current technical issue with this sheet is that powdered or granular superabsorbent resin is sandwiched between the sheets. The problem is how to uniformly disperse and immobilize the polyester resin, and how to fully utilize its inherent high water absorption and water retention properties in the final product stage.
このような高吸水性樹脂をシート状にすること
については既に多くの提案がある（特開昭56−
9458、特開昭56−89839、特開昭56−91052など）。
しかしながら、これらの高吸水性樹脂は成形加工
性に乏しい粉末状または粒状であるため、パル
プ、紙、繊維など他の素材の間にはさんでシート
状にするものであり、これらのパルプ、紙、繊維
などは単に毛細管現象で吸水するだけであるた
め、その吸水量も少なく、かつ、その保水能力は
非常に低い。従つて、高吸水性樹脂が不均一に充
填積層された場合、高吸水性樹脂の少ない、ある
いは殆んどない個所では保水能力の非常に低いシ
ートになつてしまうという大きな欠点がある。 There have already been many proposals for making sheets of super absorbent resin (Japanese Unexamined Patent Application Publication No. 1983-1999).
9458, JP-A-56-89839, JP-A-56-91052, etc.).
However, these superabsorbent resins are in the form of powder or granules with poor moldability, so they are sandwiched between other materials such as pulp, paper, and fibers to form a sheet. Since fibers and the like simply absorb water through capillary action, the amount of water they absorb is small, and their water retention capacity is extremely low. Therefore, if the superabsorbent resin is filled and laminated unevenly, there is a major drawback that the sheet will have a very low water retention capacity in areas where there is little or almost no superabsorbent resin.
また、特開昭56−26099では繊維状の架橋CMC
からなるシートについて開示しているが水溶性
CMCを有機溶剤中で抄紙するため、製造上、大
がかりな溶剤対策など設備面で多くの費用がかか
るという欠点がある。 In addition, in JP-A-56-26099, fibrous cross-linked CMC
Discloses a sheet consisting of water-soluble
Because paper is made from CMC in an organic solvent, there is a drawback in that it requires a lot of equipment costs, such as extensive solvent countermeasures.
そこで鋭意検討した結果、高吸水性樹脂を積層
する際に、その片面あるいは両面にCMCシート
を使用することによつて、非常に高い吸水能力の
同時に、非常に高い保水能力を有するシートが得
られることを見出し、本発明に到達した。 As a result of extensive research, we found that by using a CMC sheet on one or both sides of superabsorbent resin when laminating them, a sheet with extremely high water absorption capacity and extremely high water retention capacity can be obtained. They discovered this and arrived at the present invention.
本発明に使用するCMCシートは、特公昭42−
2925及び特公昭43−1214に開示された方法を応用
して、綿状の酸型CMC（以下CMC−Ｈと略す）
を水中で抄紙したのち炭酸ナトリウムなどで
CMCアルカリ金属塩にすることにより基本的に
製造できる。更に、このCMCシートはDSを0.3〜
1.0、坪量を20〜300ｇ／m2、透気度を20秒以下
（２枚当りエアー300mlの透過時間）に調整したも
のを、加熱処理する方が吸水フイルター用素材と
しては好ましい。なお、このCMCシートは100％
CMCの繊維から成るシートであつても良く、ま
たはCMC繊維とパルプなどのセルロース繊維と
の混抄シートであつても良い。ただし、セルロー
ス繊維の混抄率は40重量％以下が好ましい。 The CMC sheet used in the present invention is
2925 and Japanese Patent Publication No. 43-1214, cotton-like acid type CMC (hereinafter abbreviated as CMC-H) was produced.
After making paper in water, it is made with sodium carbonate etc.
Basically, it can be produced by converting it into CMC alkali metal salt. Furthermore, this CMC sheet has a DS of 0.3~
1.0, the basis weight is 20 to 300 g/m 2 , and the air permeability is adjusted to 20 seconds or less (permeation time of 300 ml of air per two sheets) and is preferably heat-treated as a material for a water-absorbing filter. Please note that this CMC sheet is 100%
It may be a sheet made of CMC fibers, or it may be a mixed sheet of CMC fibers and cellulose fibers such as pulp. However, the mixing ratio of cellulose fibers is preferably 40% by weight or less.
本発明に使用する高吸水性樹脂としては、特開
昭56−28755や特開昭58−104901に示した部分酸
型化熱架橋CMCが非常に適したものである。こ
の熱架橋CMCは、第３成分としての架橋剤を全
く使用していない点に特徴があり、このことは応
用面において食添規格や日本薬局方などの規制を
受けないという大きな利点になる。この熱架橋
CMCの形状については、粉末、顆粒、短繊維の
いずれでも構まわないが、短繊維状のものは積層
時の定量仕込に難点があるため、粉末状または顆
粒状が好ましい。この外、デンプン系、アクリル
酸系、PVA系など、最近開発されている各種の
高吸水性樹脂も使用可能である。 The partially acidified thermally crosslinked CMC disclosed in JP-A-56-28755 and JP-A-58-104901 is very suitable as the superabsorbent resin used in the present invention. This thermally crosslinked CMC is characterized in that it does not use any crosslinking agent as a third component, and this has the great advantage of not being subject to regulations such as food additive standards or the Japanese Pharmacopoeia in terms of application. This thermal crosslinking
The shape of CMC may be powder, granules, or short fibers, but powder or granules are preferable since short fibers have difficulty in quantitative charging during lamination. In addition, various recently developed super absorbent resins such as starch-based, acrylic acid-based, and PVA-based resins can also be used.
本発明に使用する高吸水性樹脂の添加量は、高
圧過に使用する場合ほど多くの添加量を要し、
低圧過の場合ほど少ない添加量で済むが、おお
よそ10〜1000ｇ／m2であり、好ましくは50〜300
ｇ／m2である。この添加量が10ｇ／m2未満では保
水能力が小さく、1000ｇ／m2を越えると複合シー
トとしての接合力が乏しく、シート強度や形状安
定性を損う。 The amount of superabsorbent resin used in the present invention is larger when used under high pressure.
The lower the pressure, the smaller the amount needed, but it is approximately 10 to 1000 g/ m2 , preferably 50 to 300 g/m2.
g/ m2 . If the amount added is less than 10 g/m 2 , the water retention capacity will be small, and if it exceeds 1000 g/m 2 , the bonding force as a composite sheet will be poor, and the sheet strength and shape stability will be impaired.
また、本発明に使用される残りの一成分は、パ
ルプなどセルロースから成る通常紙またはテイツ
シユパルプであつてもよく、あるいは合成高分子
から成る不織布であつてもよい。これは仕上り製
品の風合いや着用感などを改良するため、または
高吸水性樹脂をより確実に固定するため、あるい
は個々の用途に対応した特性を付与するために使
用されるものである。 The remaining component used in the present invention may be ordinary paper or tissue pulp made of cellulose such as pulp, or nonwoven fabric made of synthetic polymer. This is used to improve the feel and feel of finished products, to more securely fix superabsorbent resins, or to impart properties suitable for individual applications.
以上の構成単位を複合して本発明の高吸水性シ
ートを製造する一つの方法としては、CMCシー
トの上に熱架橋CMCを散布し、その上にCMCシ
ートあるいはセルロース紙か不織布を重ねてサン
ドイツチ状にしたのち、水か水蒸気を散布し、ロ
ール乾燥することによつてつくることができる。
また、水や水蒸気の代りにアクリル系エマルジヨ
ンや一般の水溶性高分子の含水溶液をスプレー
か、あるいは浸漬する方法でも製造可能であり、
更に機械的にエンボスロールなどで強く固定する
こともできる。また、各構成単位は１層のみと限
定されず、２層、３層と重ね合わすことも可能で
ある。 One method for manufacturing the superabsorbent sheet of the present invention by combining the above structural units is to spray thermally cross-linked CMC onto a CMC sheet, and then layer a CMC sheet, cellulose paper, or nonwoven fabric on top of it, and then apply a sandwich. It can be made by forming it into a shape, then spraying it with water or steam, and then roll drying it.
It can also be produced by spraying or dipping in an aqueous solution of acrylic emulsion or general water-soluble polymer instead of water or steam.
Furthermore, it can also be firmly fixed mechanically using an embossing roll or the like. Moreover, each structural unit is not limited to only one layer, but can also be stacked in two or three layers.
本発明の高吸水性シートの大きな特徴は、例え
ば含水油類の過を行なつた際に、熱架橋CMC
などの高吸水性樹脂及びCMCシートが水を吸収
するに従い膨潤し、フイルターとしての目を詰め
てゆく傾向がみられることであり、本発明の高吸
水性シートに吸水余力がある間は透液性があり、
吸水余力がなくなつた時点で油類の透過を停止す
る機能があることである。一般に吸水剤の、ある
時点での残存吸水能力がどの程度のものであるか
をチエツクするのは簡単ではないが、本発明の高
吸水性シートにおいては、油類が透過し得る間は
水の除去が行なわれていることが保証されてお
り、油類の透過が停止したとき、あるいは過圧
力が上昇したとき、高吸水性シートを更新すれば
良いので非常に便利である。 A major feature of the super absorbent sheet of the present invention is that, for example, when filtrating water-containing oils, thermally crosslinked CMC
As the super absorbent resin and CMC sheet absorb water, they tend to swell and close the mesh as a filter. sexual,
It has a function that stops oil permeation when there is no more water absorption capacity. Generally speaking, it is not easy to check the residual water absorption capacity of a water absorbing agent at a certain point in time, but in the super absorbent sheet of the present invention, while oils can permeate through it, water can still absorb water. It is very convenient because it is guaranteed that the removal is being carried out and the superabsorbent sheet can be replaced when oil permeation stops or when overpressure increases.
従来の吸水性素材と異なる、更にもう一つの大
きな特徴は、高吸水性樹脂をサンドイツチしてい
る素材がテイツシユパルプや通常紙ではなく、高
吸水性樹脂の少なくとも片面、あるいは両面に
CMCシートを使用しているため、高吸水性樹脂
が吸水保水できなかつた水分を、このCMCシー
トが迅速に吸水し、かつ保水する能力を有してい
る点にあり、高圧下で急速過操作を行なつたと
しても水もれの心配は全くない。 Another major feature that differs from conventional water-absorbing materials is that the material on which the super-absorbent resin is sandwiched is not Teitshu pulp or regular paper, but rather the super-absorbent resin is sandwiched on at least one or both sides of the super-absorbent resin.
Because CMC sheet is used, this CMC sheet has the ability to quickly absorb and retain water that superabsorbent resin cannot absorb and retain, allowing rapid over-operation under high pressure. Even if you do this, there is no need to worry about water leakage.
また、従来の吸水性素材の場合には、純水に対
する吸水、保水性が高いものであつても、少量の
塩類を含む水溶液に対しては極端に低い吸水、保
水性しか示さないことが大きな欠点であつたが、
本発明の高吸水性シートの場合には各種の塩類を
含む水溶液や血液尿に対しても高い吸水、保水性
を示すことが特徴である。 In addition, in the case of conventional water-absorbing materials, even if they have high water absorption and water retention properties for pure water, they exhibit extremely low water absorption and water retention properties for aqueous solutions containing small amounts of salts. Although it was a drawback,
The super absorbent sheet of the present invention is characterized by exhibiting high water absorption and water retention properties even in aqueous solutions containing various salts and blood urine.
以上説明してきたように、本発明の高吸水性シ
ートは自動車用や航空機用の燃料をはじめ、灯
油、重油、機械油、食用油、その他一般有機溶剤
などの除水、防塵用フイルター素材として有用で
あり、また、紙おむつ、生理用品、ベツドパツ
ド、紙タオルなどの衛生材料や各種使い捨て用品
の吸水性素材としても有用であり、この外、除湿
用エアーフイルター素材、防湿シート材、食品乾
燥剤、各種防水用被覆剤などとしても使用するこ
とができる。 As explained above, the superabsorbent sheet of the present invention is useful as a filter material for water removal and dustproofing of automobile and aircraft fuels, as well as kerosene, heavy oil, machine oil, cooking oil, and other general organic solvents. It is also useful as a water-absorbing material for sanitary materials such as disposable diapers, sanitary products, bed pads, paper towels, and various disposable items. It can also be used as a waterproof coating.
以下に実施例を挙げて本発明を説明するが、本
発明はこれらにより限定されるものではない。 The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.
但し、紙及びシートの基礎物性については次の
方法によつて測定した。 However, the basic physical properties of paper and sheets were measured using the following method.
坪 量 JIS Ｐ 8124
引張強度 JIS Ｐ 8113
透気度 JIS Ｐ 8117
厚 さ JIS Ｐ 8118
ここで透気度については、JISによるとサンプ
ルシート１枚当りにつきエアー100mlの通過時間
で規定しているが、本出願特許では測定条件を一
部変更して、透気度とはサンプル紙２枚当りにつ
きエアー300mlの通過時間とした。Basis weight JIS P 8124 Tensile strength JIS P 8113 Air permeability JIS P 8117 Thickness JIS P 8118 According to JIS, air permeability is defined as the passage time of 100ml of air per sample sheet. In this patent application, the measurement conditions were partially changed, and the air permeability was defined as the passage time of 300 ml of air per two sheets of sample paper.
実施例 １
特開昭58−104901の処方に準じてNa型
DS0.75、酸型DS0.01の30〜80メツシユの顆粒状
CMCを140℃、1hr加熱処理して高吸水性樹脂の
熱架橋CMCをつくつた。Example 1 Na type according to the prescription of JP-A-58-104901
30-80 mesh granules with DS0.75 and acid form DS0.01
CMC was heat-treated at 140°C for 1 hour to create thermally cross-linked CMC of super absorbent resin.
一方、DS0.45の綿状CMC−Ｈを水中で離解し
たのち、抄紙し、予備乾燥してCMC−Ｈ紙をつ
くり、これを炭酸ナトリウム10重量％、グリセリ
ン３重量％、水87重量％から成る浴に浸漬して乾
燥して、CMCシートをつくつた。このCMCシー
トは坪量70ｇ／m2、厚さ0.12mm、透気度1.0秒、
引張強度2.5Kg／幅15mmのものであつた。 On the other hand, after disintegrating cotton-like CMC-H with a DS of 0.45 in water, it was made into paper and pre-dried to make CMC-H paper, which was made from 10% by weight of sodium carbonate, 3% by weight of glycerin, and 87% by weight of water. CMC sheets were made by immersing them in a bath containing CMC and drying them. This CMC sheet has a basis weight of 70g/m 2 , a thickness of 0.12mm, an air permeability of 1.0 seconds,
It had a tensile strength of 2.5 kg and a width of 15 mm.
上述の熱架橋CMCをこのCMCシート２枚の間
に積層し、水蒸気を散布したのち、熱ロールで乾
燥して吸水シートを作成した。このとき熱架橋
CMCの添加量は150ｇ／m2であつた。 The above-mentioned thermally crosslinked CMC was laminated between the two CMC sheets, sprayed with water vapor, and then dried with a hot roll to produce a water-absorbing sheet. At this time, thermal crosslinking
The amount of CMC added was 150 g/m 2 .
この積層した吸水シートは坪量280ｇ／m2、厚
さ0.4mmのものであつた。このシートについて、
軽油中の吸水能力を測定した。その測定法として
は、サンプルシートを直径140mmの円形に切り、
加圧過器のフイルター部にセツトし、含水軽油
を仕込み、エアーで加圧して過し、液中の水
分を測定した。 This laminated water absorbent sheet had a basis weight of 280 g/m 2 and a thickness of 0.4 mm. About this sheet
The water absorption capacity in light oil was measured. The measurement method is to cut the sample sheet into a circle with a diameter of 140 mm,
It was set in the filter section of a pressurizer, charged with water-containing light oil, and filtered by pressurizing with air, and the water content in the liquid was measured.
過処理すべき軽油には、１バツチ当り軽油
500mlに水20mlを混合したものを使用した。 For diesel oil that should be overtreated, 1 batch of diesel oil
A mixture of 500 ml and 20 ml of water was used.
この結果、エアーによる過圧力が0.5Kg／cm2
以下で過時間が１バツチ当り１分以内で過は
終了した。この過後の軽油約500ml中には分離
水が全く認められなかつた。更にこの過後の軽
油中の溶解水分をカールフイツシヤー法により測
定した結果、20ppmであつた。過前の軽油中の
溶解水分は130ppmであつた。 As a result, the overpressure due to air is 0.5Kg/cm 2
The test was completed within 1 minute per batch in the following manner. After this filtration, no separated water was observed in the approximately 500 ml of gas oil. Furthermore, the dissolved water content in the gas oil after this lapse was measured by the Karl Fischer method and was found to be 20 ppm. Dissolved water in diesel oil was 130 ppm some time ago.
比較例 １
実施例１においてCMCシート２枚ではなく、
テイツシユペーパー状パルプ２枚に換えて積層シ
ートを作成した。Comparative Example 1 Instead of two CMC sheets in Example 1,
A laminated sheet was created in place of two sheets of tissue paper-like pulp.
このテイツシユペーパーは坪量35ｇ／m2、厚さ
0.1mmのものであつた。 This paper has a basis weight of 35g/m 2 and a thickness of
It was 0.1mm.
実施例１と同様に、このテイツシユペーパーに
熱架橋CMCを積層したシートについて含水軽油
中の吸水能力を測定した。 In the same manner as in Example 1, the water absorption capacity in water-containing light oil was measured for a sheet in which thermally crosslinked CMC was laminated on this tissue paper.
その結果、加圧過時の圧力は0.5Kg／cm2以下
で過時間は１分以内で終了したが、その過後
の軽油約500ml中には分離水が約２ml認められ、
その軽油中の溶解水分は100ppmであつた。 As a result, the pressure at the time of overpressurization was less than 0.5 Kg/cm 2 and the elapsed time ended within 1 minute, but after that time, about 2 ml of separated water was found in about 500 ml of diesel oil.
The dissolved water content in the light oil was 100 ppm.
実施例 ２
実施例１の吸水シートを加圧過器にセツト
し、処理すべきオイルとしてダフニーオイルNo.56
（出光興産製潤滑油）500mlを用いた。過処理前
のダフニーオイル中の溶解水分は20ppmであつた
が、処理後には溶解水分が0.4ppmとなつた。Example 2 The water absorption sheet of Example 1 was set in a pressurizer, and Daphne Oil No. 56 was used as the oil to be treated.
(Lubricating oil made by Idemitsu Kosan) 500ml was used. The dissolved water content in Daphne oil before overtreatment was 20 ppm, but after the treatment, the dissolved water content was 0.4 ppm.
実施例 ３
実施例１の吸水シートを加圧過器にセツト
し、処理すべきオイルとして家庭用サラダオイル
（日清製油製）500mlに水10ml添加したものを用い
た。その結果、過処理後のサラダオイル中には
分離水が全く認められなかつた。Example 3 The water-absorbing sheet of Example 1 was set in a pressurizer, and the oil to be treated was 500 ml of household salad oil (manufactured by Nisshin Oil Co., Ltd.) with 10 ml of water added. As a result, no separated water was observed in the salad oil after overtreatment.
実施例 ４
実施例１の吸水シートを加圧過器にセツト
し、処理すべき有機溶剤としてメチルイソブチル
ケトン500mlに水10ml添加したものを用いた。そ
の結果、過処理後のメチルイソブチルケトン中
には分離水が全く認められなかつた。Example 4 The water-absorbing sheet of Example 1 was set in a pressurizer, and a mixture of 500 ml of methyl isobutyl ketone and 10 ml of water was used as the organic solvent to be treated. As a result, no separated water was observed in methyl isobutyl ketone after overtreatment.
実施例 ５
実施例１において、CMCシートの間に熱架橋
CMCを450ｇ／m2積層したシートを作成し、他は
実施例１と同様に含水軽油中の吸水能力を測定し
た。その結果、過処理後の軽油中には分離水が
全く認められず、更にその軽油中の溶解水分は
10ppmであつた。Example 5 In Example 1, thermal crosslinking between CMC sheets
A sheet with 450 g/m 2 of CMC laminated was prepared, and the water absorption capacity in water-containing light oil was measured in the same manner as in Example 1. As a result, no separated water was observed in the gas oil after overtreatment, and furthermore, dissolved water in the gas oil was
It was 10ppm.
実施例 ６
実施例１の吸水シートを加圧過器にセツト
し、１バツチ目の分離水20mlを含む軽油500mlを
実施例１に記述した過圧力及び過時間で終了
したのち、引続き同一シートに対し、２バツチ目
の水２mlを含む軽油500mlを過した。このとき
の過圧も0.5Kg／cm2以下であり、過時間も１
分以内で終了し、過後の軽油中に分離水は全く
認められなかつた。更に引続き同一シートに対
し、３バツチ目の水20mlを含む軽油500mlを仕込
み、過しようとしたところ、過圧力を３Kg／
cm2に上げても全く過できなかつた。Example 6 The water-absorbing sheet of Example 1 was set in a pressurizer, and the first batch of 500 ml of light oil containing 20 ml of separated water was applied to the same sheet after the overpressure and overtime described in Example 1 were completed. On the other hand, the second batch contained 500 ml of light oil containing 2 ml of water. The overpressure at this time was also less than 0.5Kg/ cm2 , and the elapsed time was also 1
The process was completed within minutes, and no separated water was observed in the gas oil after the process. Furthermore, when I tried to fill the same sheet with a third batch of 500 ml of diesel oil containing 20 ml of water, the overpressure was 3 kg/
Even if I raised it to cm2 , I couldn't get over it at all.
このことは、熱架橋CMC及びCMCシートが飽
和吸水量に達したため、膨潤によりフイルターの
目を詰まらせ、軽油自体の透過を停止する機能の
あることを示していた。 This indicated that the thermally crosslinked CMC and CMC sheet had reached a saturated water absorption capacity, so they swelled and clogged the filter, thereby stopping the light oil itself from permeating.
実施例 ７
実施例１において、CMCシート２枚ではなく、
CMCシート１枚と、比較例１のテイツシユペー
パー１枚の間に熱架橋CMCを積層して吸水シー
トを作成した。この吸水シートの吸水能力を同様
に測定した結果、加圧過処理した軽油中には分
離水が全く認められず、更にその軽油中の溶解水
分は27ppmであつた。Example 7 In Example 1, instead of two CMC sheets,
A water-absorbing sheet was prepared by laminating thermally crosslinked CMC between one CMC sheet and one tissue paper of Comparative Example 1. The water absorption capacity of this water-absorbing sheet was similarly measured, and as a result, no separated water was observed in the pressure-overtreated light oil, and the dissolved water in the light oil was 27 ppm.
実施例 ８
実施例１の吸水シートについて、以下の方法で
純水及び１％食塩水に対する吸液能力を測定し
た。20×20mm角に切つたシートを200mlの純水ま
たは１％食塩水に室温下30分間浸漬し、ゆつくり
撹拌したのち金網付き遠心沈降管に移して遠心分
離を行なつた。この遠沈管には、その内側に80メ
ツシユの金網（直径25mm、高さ60mmの円筒状）が
セツトしてあり、遠心中に流出する液がサンプル
から分離されるようしたものである。遠心効果
500Gにて５分間、遠心分離したのち、金網上に
残つているサンプルの重量（W1）を測定し、105
℃にて乾燥したのちの絶乾重量（W2）を測定し
て遠心保液率（W1−W2／W2）を求めた。Example 8 Regarding the water-absorbing sheet of Example 1, the liquid-absorbing ability for pure water and 1% saline was measured by the following method. A sheet cut into 20 x 20 mm squares was immersed in 200 ml of pure water or 1% saline for 30 minutes at room temperature, gently stirred, and then transferred to a centrifugal sedimentation tube with wire mesh for centrifugation. This centrifuge tube had an 80-mesh wire mesh (cylindrical shape, 25 mm in diameter and 60 mm in height) set inside the tube to separate the liquid flowing out during centrifugation from the sample. centrifugal effect
After centrifuging at 500G for 5 minutes, the weight (W1) of the sample remaining on the wire mesh was measured, and 105
After drying at ℃, the absolute dry weight (W2) was measured to determine the centrifugal liquid retention rate (W1-W2/W2).
この結果、実施例１の吸水シートの遠心保液率
は、純水の場合が210倍、１％食塩水の場合が70
倍であつた。 As a result, the centrifugal liquid retention rate of the water-absorbing sheet of Example 1 was 210 times for pure water and 70 times for 1% saline solution.
It was twice as hot.
比較例 ２
実施例８との比較のため、市販の高吸水性樹脂
（デンプン系）を比較例１で示したテイツシユペ
ーパーの間に積層したシートについて、実施例８
の方法で吸液能力を測定した。このシートの坪量
（添加量）は実施例８の吸水シートと同一のもの
とした。Comparative Example 2 For comparison with Example 8, a sheet in which a commercially available super absorbent resin (starch type) was laminated between the tissue papers shown in Comparative Example 1 was prepared.
The liquid absorption capacity was measured using the method described below. The basis weight (addition amount) of this sheet was the same as that of the water absorbent sheet of Example 8.
この結果、この比較シートの遠心保液率は純水
の場合が180倍、１％食塩水の場合が13倍であつ
た。 As a result, the centrifugal liquid retention rate of this comparison sheet was 180 times higher in the case of pure water and 13 times higher in the case of 1% saline solution.
Claims (1)
複合シートであつて、そのシート状物質の少なく
とも１枚がカルボキシメチルセルロースアルカリ
金属塩からなるシートであることを特徴とする高
吸収性シート。1. A superabsorbent sheet which is a composite sheet in which a superabsorbent resin is laminated between sheet-like materials, and at least one of the sheet-like materials is a sheet made of carboxymethyl cellulose alkali metal salt.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58245776A JPS60141551A (en) | 1983-12-29 | 1983-12-29 | High absorptive sheet |
| FI845138A FI84621C (en) | 1983-12-29 | 1984-12-27 | Dehydraticeringsförfarande |
| DE8484116447T DE3482164D1 (en) | 1983-12-29 | 1984-12-28 | WATER DEPTH METHOD. |
| EP84116447A EP0149251B1 (en) | 1983-12-29 | 1984-12-28 | Dehydrating method |
| US06/687,303 US4584092A (en) | 1983-12-29 | 1984-12-28 | Dehydrating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58245776A JPS60141551A (en) | 1983-12-29 | 1983-12-29 | High absorptive sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60141551A JPS60141551A (en) | 1985-07-26 |
| JPH0254780B2 true JPH0254780B2 (en) | 1990-11-22 |
Family
ID=17138643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58245776A Granted JPS60141551A (en) | 1983-12-29 | 1983-12-29 | High absorptive sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60141551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8877002B2 (en) | 2002-11-28 | 2014-11-04 | Tokyo Electron Limited | Internal member of a plasma processing vessel |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6218127U (en) * | 1985-07-18 | 1987-02-03 | ||
| JPH0453940Y2 (en) * | 1986-02-14 | 1992-12-18 | ||
| JPS63139741A (en) * | 1986-12-02 | 1988-06-11 | 白十字株式会社 | Water-absorbing sheet |
| JPH0191861A (en) * | 1987-04-03 | 1989-04-11 | Takeshi Karita | Method and member for removing moisture from surface of wound |
| JPH05132661A (en) * | 1991-11-12 | 1993-05-28 | Kyoei Sangyo Kk | Composition for supplying water to animal tissue or plant |
| JP4738897B2 (en) * | 2005-06-06 | 2011-08-03 | 株式会社鷺宮製作所 | Ultrasonic flow meter |
-
1983
- 1983-12-29 JP JP58245776A patent/JPS60141551A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8877002B2 (en) | 2002-11-28 | 2014-11-04 | Tokyo Electron Limited | Internal member of a plasma processing vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60141551A (en) | 1985-07-26 |
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