JPH0331552Y2 - - Google Patents
Info
- Publication number
- JPH0331552Y2 JPH0331552Y2 JP14657186U JP14657186U JPH0331552Y2 JP H0331552 Y2 JPH0331552 Y2 JP H0331552Y2 JP 14657186 U JP14657186 U JP 14657186U JP 14657186 U JP14657186 U JP 14657186U JP H0331552 Y2 JPH0331552 Y2 JP H0331552Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- hydrophilic polyurethane
- layer
- sheets
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 229920002635 polyurethane Polymers 0.000 claims description 16
- 239000004814 polyurethane Substances 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 description 15
- 239000010410 layer Substances 0.000 description 14
- 239000002537 cosmetic Substances 0.000 description 7
- 230000002745 absorbent Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 229920005862 polyol Polymers 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は強度大にして表面が美粧性に富み、且
つ耐候性、耐摩耗性を有し、しかも、吸水量が大
きく、水切り等の操作によつても容易に水を放出
しない保水力の大きな新規な吸水性シートに関す
る。[Detailed description of the invention] (Field of industrial application) The present invention has high strength, a highly cosmetic surface, weather resistance and abrasion resistance, and also has a large amount of water absorption, making it easy to operate such as draining. This invention relates to a new water-absorbent sheet with a large water-retaining capacity that does not easily release water even when exposed to water.
（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堅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含水量は約0.2g／dryc.c.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
たがつて、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) Water-absorbing sheets made of synthetic resin sponges have been used in many fields including sheets for patients, cosmetic products, cleaning products, and hydroponic culture media, but they are still used. I can't find anything that satisfactorily meets that demand. For example, water-absorbent sheets made of polyvinyl alcohol sponge are widely used as cleaning sheets, but when the water content evaporates, they lose their elasticity or flexibility and become hard, so they must be kept moist at all times. All water-absorbent sheets made of synthetic resin sponge imparted with hydrophilic properties have a small amount of water absorption; for example, even a relatively large water-absorbent sheet made of hydrophilic polyurethane sponge has a water content of approximately 0.2 g/dryc.c. In addition, these water-absorbing sheets easily release water by simply shaking the water-containing sheet several times by hand, and their water-retaining capacity is extremely small. However, in the water drainage test of the present invention (the test method will be described later), it only showed about 70% residual moisture, and these properties naturally limited its field of use.
本考案者はこれらの欠点を改良し含水量が大き
く、且つ保水力も大きい吸水性シートを見出し、
先に出願をしたが（実願昭61−132677号参照）。
ただ、このシートはその表面がポリウレタンスポ
ンジであるため耐候性および耐摩耗性に欠け、ま
た、その外観も必ずしも好ましいものとは言えな
かつた。そこで本考案者は、この吸水性シートを
改良すべく種々検討した結果、本考案を完成した
もので、本考案の目的は強度大にして表面が美粧
性に富み、且つ、耐候性、耐摩耗性を有し、しか
も、吸水量が大きく、水切り等の操作によつても
容易に水を放出しない保水力の大きな新規な吸水
性シートを提供するにある。 The present inventor improved these shortcomings and discovered a water-absorbent sheet with a high water content and high water retention capacity.
I filed an application earlier (see Utility Application No. 132677, 1983).
However, since the surface of this sheet is made of polyurethane sponge, it lacks weather resistance and abrasion resistance, and its appearance is not necessarily desirable. Therefore, the present inventor conducted various studies to improve this water-absorbing sheet, and as a result, he completed the present invention.The purpose of the present invention is to have high strength, a highly cosmetic surface, and a weather-resistant and abrasion-resistant sheet. To provide a new water-absorbing sheet having a high water-retaining capacity, which has a high water-absorbing capacity, and does not easily release water even by operations such as draining.
（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0.08〜0.3g／
c.c.、含水量が約0.5〜3.0g／dryc.c.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の片面もしくは
両面にシート層を積層してからなる吸水性シート
であつて、本考案における含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つたのち含水水分重量
（ｇ／dryc.c.）を乾燥時の試料シートの体積で割
つた値であり、また、水切試験とは直径25cm、深
さ約３cmのプラスチツ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。(Means for solving the problem) In other words, the present invention has an apparent specific gravity of 0.08 to 0.3 g/
cc, consisting of a sheet layer laminated on one or both sides of a hydrophilic polyurethane sponge with a water content of approximately 0.5 to 3.0 g/dryc.c. and a water retention capacity of 80% or more of residual moisture in a drainage test. For water-absorbent sheets, the water content in this invention is defined as the water content (g/dryc.c.) after immersing a sample sheet at room temperature for 10 minutes or more, wiping off free water adhering to its surface, and calculating the water content (g/dryc.c.). This is the value divided by the volume of the sample sheet when dry. Also, the draining test involves placing the sample sheet in a plastic colander with a diameter of 25 cm and a depth of about 3 cm, stopping at a height of about 70 cm, and repeating this operation 115 times. This is the measured value of residual moisture after repeating.
そして、本考案の吸水性シートにおいて積層に
使用されるシートとしては不織布、布、繊維割
布、紙、プラスチツクフイルム、金属シートをは
じめとしゴムスポンジ、軟質スポンジ、硬質スポ
ンジ等の多孔体シート等でもよく、または、これ
らのシートを適宜組み合わせたラミネートシート
でもよい。親水性ポリウレタンスポンジ層は通常
の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
のうち上記の特性を有するものであつて、このよ
うな特性を付与する手段としては例えば親水性ポ
リウレタンスポンジを熱圧縮処理する等の手段に
依つて得られる。 The sheets used for lamination in the water-absorbing sheet of the present invention include non-woven fabric, cloth, fiber cloth, paper, plastic film, metal sheets, and porous sheets such as rubber sponge, soft sponge, and hard sponge. Alternatively, a laminate sheet formed by appropriately combining these sheets may be used. The hydrophilic polyurethane sponge layer is made by adding a foaming agent to a reaction component consisting of a normal polyisocyanate and a polyol to cause a foaming reaction, and has the above-mentioned characteristics, and there is no means for imparting such characteristics. For example, it can be obtained by heat compression treatment of a hydrophilic polyurethane sponge.
本考案に係る吸水性シートの親水性ポリウレタ
ンスポンジ層の製造方法の一例を示すと、ポリオ
ール成分として分子量約2000〜3000の長鎖ポリエ
チレングリコールと分子量約2000〜3000の長鎖ポ
リプロピレングリコールを、イソシアネート成分
としてトリレンジイソシアネートを使用し、更に
ポリオール成分中には金属塩系触媒及びシリコン
製泡剤を混合し、発泡剤として水を用いて、常法
によつて反応せしめて親水性ポリウレタンフオー
ムを製造した。 An example of the method for producing the hydrophilic polyurethane sponge layer of a water absorbent sheet according to the present invention is to use long chain polyethylene glycol with a molecular weight of about 2000 to 3000 as a polyol component and long chain polypropylene glycol with a molecular weight of about 2000 to 3000 as an isocyanate component. A hydrophilic polyurethane foam was produced by using tolylene diisocyanate as a polyol component, mixing a metal salt catalyst and a silicone foaming agent in the polyol component, and using water as a foaming agent to react in a conventional manner. .
得られた軟質連続気泡を有する親水性ポリウレ
タンフオームの見掛け比重は0.03g／c.c.であり、
その吸水量で0.17g／dryc.c.あつた。 The apparent specific gravity of the obtained hydrophilic polyurethane foam having soft open cells was 0.03 g/cc,
The amount of water absorbed was 0.17g/dryc.c.
この親水性ポリウレタンスポンヂを熱板が200
〜240℃のホツトプレスによつて、その体積を約
１／５に熱圧縮成形した。得られたフオームのカサ
比重（見掛比重）は５倍の0.15g／c.c.となり、含
水量10倍強の1.7g／dryc.c.となつた。したがつ
て、本考案の積層された吸水性シートの製造手段
としては上記の特性を有する親水性ポリウレタン
スポンジに積層されるシートを接着剤で接着した
り、熱圧着したりする方法は勿論のこと、親水性
ポリウレタンスポンジと積層されるシートとをプ
レス等により一体成形することによつても得られ
る。 This hydrophilic polyurethane sponge is heated to 200 ml on a hot plate.
The volume was reduced to about 1/5 by hot pressing at ~240°C. The bulk specific gravity (apparent specific gravity) of the obtained foam was 5 times as high as 0.15 g/cc, and the water content was more than 10 times as high as 1.7 g/dryc.c. Therefore, as a method for producing the laminated water absorbent sheet of the present invention, it goes without saying that the sheets laminated to the hydrophilic polyurethane sponge having the above characteristics may be bonded with an adhesive or thermocompression bonded. It can also be obtained by integrally molding a hydrophilic polyurethane sponge and a laminated sheet using a press or the like.
本考案に係る吸水性シートは、その親水性ポリ
ウレタンスポンヂ層の一方の面または両面にシー
ト層を積層してあるので表面は滑らかで美粧性を
有し、また、その表面に凹凸模様や柄模様などの
模様層を有していてもよく、そのような模様層を
有することにより一層美粧性は高められる。しか
して、このような模様層は模様を有するシートを
親水性ポリウレタンスポンジに積層したり、ある
いは、積層と同時にもしくは積層後に模様を施こ
したりすることにより形成され、例えば、凹凸模
様の付与手段としては凹凸模様を有するシートを
前記の特性を有する親水性ポリウレタンスポンジ
に積層したり、または、積層後にエンボツシング
したり、あるいは、凹凸模様を有するロールもし
くはプレートで親水性ポリウレタンスポンジとシ
ートとを熱圧着することにより容易に得られる。 The water absorbent sheet according to the present invention has a sheet layer laminated on one or both sides of the hydrophilic polyurethane sponge layer, so the surface is smooth and cosmetic, and the surface has an uneven pattern or pattern. It may have a pattern layer such as the following, and the cosmetic effect is further enhanced by having such a pattern layer. Such a pattern layer is formed by laminating a patterned sheet onto a hydrophilic polyurethane sponge, or by applying a pattern at the same time or after lamination. A sheet having an uneven pattern is laminated on a hydrophilic polyurethane sponge having the above-mentioned characteristics, or embossing is performed after lamination, or the hydrophilic polyurethane sponge and the sheet are thermocompressed using a roll or plate having an uneven pattern. can be easily obtained by
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
止用マツト、風呂用マツト、生鮮食品用吸水マツ
ト等、多く分野に使用することができる。 The water-absorbent sheet of the present invention can be used not only in the fields where water-absorbent sheets have been used in the past, such as cosmetics, cleaning products, hydroponic culture media, and cleaning filters, but also in anti-static mats, bath mats, and perishables. It can be used in many fields, such as water-absorbing mats for food.
（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0.08〜0.3g／c.c.、含水量が約0.5〜
3.0g／dryc.c.であつ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を有する
親水性ポリウレタンスポンジ層を有し、その片面
若しくは両面にシートを積層したものであつて、
スポンジ層自体は、従来のスポンジシートより見
掛け比重が大きく、また含水量が大きいので取扱
いが容易であり、また、表面層を有するので、美
粧性、耐候性、耐摩耗性を有し、しかも、積層さ
れるシートの種類およびその表面の模様によつて
従来の吸水シートより更に広い種々の分野に利用
されるのである。(Effects) As mentioned above, the water absorbent sheet according to the present invention has an apparent specific gravity of 0.08 to 0.3 g/cc and a water content of approximately 0.5 to 0.5 g/cc.
3.0g/dryc.c. and has a hydrophilic polyurethane sponge layer with a water retention capacity of 80% or more of residual moisture in a drainage test, and a sheet is laminated on one or both sides of the sponge layer. ,
The sponge layer itself has a higher apparent specific gravity than conventional sponge sheets, and has a higher water content, so it is easier to handle, and since it has a surface layer, it has cosmetic properties, weather resistance, and abrasion resistance. Depending on the type of laminated sheets and the pattern on their surface, they can be used in a wider variety of fields than conventional water absorbent sheets.
第１図は本考案に係る吸水性シートの断面図で
あり、第２図は本考案に係る他の吸水性シートの
断面図である。
１……親水性ポリウレタンスポンジ層、２……
シート層、３……凹凸模様層。
FIG. 1 is a cross-sectional view of a water-absorbent sheet according to the present invention, and FIG. 2 is a cross-sectional view of another water-absorbent sheet according to the present invention. 1...Hydrophilic polyurethane sponge layer, 2...
Sheet layer, 3... uneven pattern layer.
Claims (1)
〜3.0g／dryc.c.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層の一方の面または両面に
シート層を積層してなる吸水性シート。 ２ 表面に凹凸もしくは模様層を有するシート層
である実用新案登録請求の範囲第１項記載の吸
水性シート。[Scope of utility model registration claims] 1. Apparent specific gravity is 0.08 to 0.3 g/cc, water content is approximately 0.5
~3.0g/dryc.c., and has a water-retaining capacity with residual moisture of 80% or more in a drainage test.A water-absorbing sheet formed by laminating sheet layers on one or both sides of a hydrophilic polyurethane sponge layer. 2. The water-absorbing sheet according to claim 1, which is a sheet layer having an uneven or patterned layer on its surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14657186U JPH0331552Y2 (en) | 1986-09-26 | 1986-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14657186U JPH0331552Y2 (en) | 1986-09-26 | 1986-09-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6353727U JPS6353727U (en) | 1988-04-11 |
| JPH0331552Y2 true JPH0331552Y2 (en) | 1991-07-04 |
Family
ID=31059159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14657186U Expired JPH0331552Y2 (en) | 1986-09-26 | 1986-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0331552Y2 (en) |
-
1986
- 1986-09-26 JP JP14657186U patent/JPH0331552Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6353727U (en) | 1988-04-11 |
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