JPH0636908Y2 - Water absorbent sheet - Google Patents
Water absorbent sheetInfo
- Publication number
- JPH0636908Y2 JPH0636908Y2 JP1986132677U JP13267786U JPH0636908Y2 JP H0636908 Y2 JPH0636908 Y2 JP H0636908Y2 JP 1986132677 U JP1986132677 U JP 1986132677U JP 13267786 U JP13267786 U JP 13267786U JP H0636908 Y2 JPH0636908 Y2 JP H0636908Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- absorbent sheet
- present
- sheet
- water absorbent
- 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
Landscapes
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は吸水量が大きく且つ、水切り等の操作によって
も容易に水を放出しない保水力の大きな新規な吸水シー
トに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a novel water-absorbing sheet having a large water absorption capacity and a large water retention capacity that does not easily release water even by an operation such as draining.
（従来技術及び解決すべき問題点） 従来より病人用シート、化粧用用品、清掃用品或は水耕
用培地をはじめとして多くの分野において合成樹脂スポ
ンジよりなる吸水性シートが使用されているが未だ十分
にその要望にこたえるものは見当らない。例えばポリビ
ニルアルコールスポンジからなる吸水性シートは清掃用
シートとして広く使用されているが含有水分が蒸発する
と弾性もしくは柔軟性を喪失して硬くなるので常に湿潤
状態にして使用しなければならず、また、親水性を賦与
した合成樹脂スポンジからなる吸水性シートは何れもそ
の吸水量が小さく、例えば親水性ポリウレタンスポンジ
からなる比較的大なる吸水性シートにおいてもその吸水
量は約0.2g/dry cc程度であるのみならず、これら吸水
性シートは含水状態のものを単に水切り操作として手で
数回振り切るだけで容易に水を放出し、その保水力は極
めて小さく、例えば、比較的保水性のあるものでも本考
案の水切試験（試験方法については後述する）では約70
％の残留水分を示すのみであり、したがって、これらの
性質のためにその利用分野も自ずと限られていた。(Prior art and problems to be solved) Conventionally, a water absorbent sheet made of a synthetic resin sponge has been used in many fields including a sick sheet, a cosmetic product, a cleaning product or a hydroponic medium, but it has not been used yet. I haven't found anything that can meet that demand. For example, a water-absorbent sheet made of polyvinyl alcohol sponge is widely used as a cleaning sheet, but if the water content evaporates, it loses elasticity or flexibility and becomes hard, so it must always be used in a wet state. All of the water-absorbent sheets made of synthetic resin sponge imparting hydrophilicity have a small water absorption amount.For example, even in a relatively large water-absorbent sheet made of hydrophilic polyurethane sponge, the water absorption amount is about 0.2 g / dry cc. In addition to these, these water-absorbent sheets easily release water by simply shaking off the water-containing sheet several times as a draining operation, and their water retention capacity is extremely small, for example, even those with relatively water retention. The drainage test of the present invention (test method will be described later) is about 70
It only showed a% residual water content, and therefore its field of use was naturally limited due to these properties.
本考案者はこれらの従来の吸水性シートの有する欠点を
改善し更に吸水量が大きく、且つ保水力も大きい新規な
吸水性シートを見出すべく種々検討した結果、親水性ポ
リウレタンスポンジを熱圧縮成形して得たものは極めて
大きい吸水量及び保水性を有することを見出し、本考案
を完成したもので、本考案の目的は吸水量が大きく且つ
保水性の大なる新規な吸水性シートを提供するにある。The present inventor has made various studies to improve the drawbacks of these conventional water absorbent sheets and to find a new water absorbent sheet having a large water absorption capacity and a large water retention ability. It was found that the obtained product has an extremely large amount of water absorption and water retention, and the present invention has been completed. An object of the present invention is to provide a novel water absorbent sheet having a large amount of water absorption and a high water retention. .
（問題点を解決するための手段） すなわち、本考案は見掛け比重が0.08〜0.3、吸水量が
約0.5〜2.50g/dry ccであり、且つ水切試験における残
留水分が80％以上の保水力を有する親水性ポリウレタン
スポンジからなる吸水性シートであって、本考案におけ
る吸水量とは試料シートを室温で10分間以上浸漬したの
ち其の表面に付着した遊離水分を拭きとったのちの吸水
水分重量（g/dry cc）を乾燥時の試料シートの体積で割
った値であり、また、水切試験とは直径25cm、深さ約3c
mのプラスチック製ざるに前記試料シートを入れ約70cm
の落差で止め、此の操作を115回繰り返したのちの残留
水分の測定値である。なお、この水切操作の回数と残留
水分との関係を市販の吸水シートおよびポリウレタンシ
ートと比較して示すと第２図のようになる。ここで、残
留水分とは吸は吸水時の全重量を100とし、水切回数に
対応した重量減少率を％で示した値である。そして、本
考案の吸水性シートを構成している親水性ポリウレタン
スポンジとはポリイソソアネートとポリオールとからな
る反応成分に発泡剤を添加して発泡反応せしめたもので
ある。(Means for solving the problem) That is, the present invention has an apparent specific gravity of 0.08 to 0.3, a water absorption of about 0.5 to 2.50 g / dry cc, and a residual water content of 80% or more in a drainage test. A water-absorbent sheet made of a hydrophilic polyurethane sponge having a water absorption amount in the present invention means the weight of water absorbed after the sample sheet is immersed at room temperature for 10 minutes or more and the free water adhering to the surface is wiped off ( g / dry cc) divided by the volume of the sample sheet when dried, and the drainage test is a diameter of 25 cm and a depth of about 3 c
Approximately 70 cm with the above sample sheet put in a plastic colander of m
It is the measured value of the residual water after the operation is stopped 115 times and the operation is repeated 115 times. The relationship between the number of draining operations and the residual water content is shown in FIG. 2 in comparison with the commercially available water absorbing sheet and polyurethane sheet. Here, the residual water content is a value indicating the weight reduction rate corresponding to the number of drainages in%, with the total weight when absorbing water being 100. The hydrophilic polyurethane sponge constituting the water-absorbent sheet of the present invention is a reaction product composed of polyisosonate and polyol, to which a foaming agent is added to cause a foaming reaction.
しかして、本考案のかかる特性を有する新規な吸水性シ
ートは例えば親水性ポリウレタンスポンジを単独、又
は、該スポンジに吸水性物質を添加したものを熱圧縮処
理するという手段によって得られる。Thus, the novel water-absorbent sheet having such characteristics of the present invention can be obtained, for example, by hydrophilic hydrophilic sponge alone or by heat-compressing the sponge to which a water-absorbing substance is added.
本考案にかかる吸水性シートは従来吸水性シートが使用
されている化粧用品、清掃用品、水耕用培地、洗浄用濾
過剤の分野は勿論のこと、静電防止用マット、風呂用マ
ット、生鮮食品用吸水マット等、多くの分野に使用する
ことができる。The water-absorbent sheet according to the present invention can be used not only in the fields of cosmetics, cleaning products, hydroponic culture media, and filter agents for washing in which water-absorbent sheets are conventionally used, but also in antistatic mats, bath mats, fresh foods. It can be used in many fields such as a water absorbent mat for food.
次ぎに実施例をもって、本考案を更に具体的に説明す
る。Next, the present invention will be described more specifically with reference to Examples.
実施例１ 本考案に係る吸水性シートの製造の一例を示すと、ポリ
オール成分として分子量約5000（ｆ＝３）エチレンオキ
サイド単位含有量約60％のものと分子量3500（ｆ＝３）
のエチレンオキサイド単位含有量約60％のものとのもの
をそれぞれ約50:50の割合で混合したものを使用し、こ
のポリオール成分100に対してトリレンディイソシアネ
ートTDI−80（2,4−/2,6異性体比80/20）約100の当量を
添加、混合発泡し、幅1000〜1100mm、高さ約450〜500mm
の断面形状に連続的に発泡押出を行う。得られた親水性
ポリウレタンフォームの特性は見掛密度0.03g/cc、伸び
160％、硬さ9.5±2kg/314cm2、吸水量0.16g/dry ccであ
った。Example 1 An example of the production of the water absorbent sheet according to the present invention is shown. The polyol component has a molecular weight of about 5000 (f = 3), the ethylene oxide unit content is about 60%, and the molecular weight is 3500 (f = 3).
Ethylene oxide unit content of about 60% and those of about 50:50 were mixed respectively, and tolylene diisocyanate TDI-80 (2,4- / 2 , 6 isomer ratio 80/20) Add about 100 equivalents, mix and foam, width 1000-1100mm, height about 450-500mm
The foam extrusion is continuously performed in the cross-sectional shape of. The properties of the resulting hydrophilic polyurethane foam have an apparent density of 0.03 g / cc and elongation.
The hardness was 160%, the hardness was 9.5 ± 2 kg / 314 cm 2 , and the water absorption was 0.16 g / dry cc.
この親水性ポリウレタンフォームの厚さ15mmのものを3m
mに熱圧縮したところ吸水量は1.7g/dry ccとなった。This hydrophilic polyurethane foam with a thickness of 15 mm is 3 m
When heat compressed to m, the water absorption amount was 1.7 g / dry cc.
（効果） 以上述べたように、本考案に係る吸水性シートは見掛け
比重が0.08〜0.3、吸水量が約0.5〜2.50g/ccであって水
切試験における残留水分が80％以上の保水力を有すると
いう特性により、従来のスポンジシートより見掛け比重
が大きく、吸水量が大きいので水耕用培地、病人用シー
ト或は風呂用マットとして従来のものに比してすぐれて
おり、更に保水力が大きいため、簡単な衝撃によっても
水分を放出することがないので魚箱等の吸水マット等と
して適するのであり、更に、これらの特性を有すること
により例えば殺虫殺菌剤、消毒剤、洗剤、芳香剤、肥
料、各種塩類などの溶液を吸収させそれぞれの用途に供
する等の新たな分野にも利用できる等の効果を奏するの
である。(Effect) As described above, the water-absorbent sheet according to the present invention has an apparent specific gravity of 0.08 to 0.3, a water absorption amount of about 0.5 to 2.50 g / cc, and a residual water content of 80% or more in the drainage test. Due to its characteristics, it has a larger apparent specific gravity than conventional sponge sheets and has a larger water absorption, so it is superior to conventional ones as a hydroponic medium, sick sheet or bath mat, and has a greater water retention capacity. Therefore, since it does not release water even by a simple impact, it is suitable as a water-absorbing mat or the like for a fish box and the like. In addition, the present invention has an effect that it can be used in new fields such as absorbing solutions of various salts and providing them for their respective uses.
第１図は本考案に係る吸水性シートの斜視図であり、第
２図は吸水シートの水切操作の回数と残留水分との関係
を示す図面であって、横軸は回数を縦軸は残留水分を表
わす。 １……吸水性シートFIG. 1 is a perspective view of a water-absorbent sheet according to the present invention, and FIG. 2 is a drawing showing the relationship between the number of draining operations of a water-absorbent sheet and the residual water content. Represents moisture. 1 ... Water absorbent sheet
Claims (1)
して得た見掛け比重が0.08〜0.3、吸水量が約0.5〜2.50
g/dry ccであり、且つ水切試験における残留水分が80
％以上の保水力を有する親水性ポリウレタンスポンジか
らなる吸水性シート。1. An apparent specific gravity obtained by thermocompressing a hydrophilic polyurethane sponge is 0.08 to 0.3 and a water absorption is about 0.5 to 2.50.
g / dry cc and 80% residual water in the drainage test
A water absorbent sheet made of a hydrophilic polyurethane sponge having a water retention capacity of not less than%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986132677U JPH0636908Y2 (en) | 1986-09-01 | 1986-09-01 | Water absorbent sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986132677U JPH0636908Y2 (en) | 1986-09-01 | 1986-09-01 | Water absorbent sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6339534U JPS6339534U (en) | 1988-03-14 |
| JPH0636908Y2 true JPH0636908Y2 (en) | 1994-09-28 |
Family
ID=31032289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986132677U Expired - Lifetime JPH0636908Y2 (en) | 1986-09-01 | 1986-09-01 | Water absorbent sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636908Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4936950A (en) * | 1972-08-24 | 1974-04-05 |
-
1986
- 1986-09-01 JP JP1986132677U patent/JPH0636908Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6339534U (en) | 1988-03-14 |
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