JPH0653225B2 - Liquid absorbing sheet - Google Patents
Liquid absorbing sheetInfo
- Publication number
- JPH0653225B2 JPH0653225B2 JP1170994A JP17099489A JPH0653225B2 JP H0653225 B2 JPH0653225 B2 JP H0653225B2 JP 1170994 A JP1170994 A JP 1170994A JP 17099489 A JP17099489 A JP 17099489A JP H0653225 B2 JPH0653225 B2 JP H0653225B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- water
- sheet
- absorbent
- layer
- 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
- Accommodation For Nursing Or Treatment Tables (AREA)
- Laminated Bodies (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Packages (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は高吸水性高分子材料を使用した吸液シートに関
し、詳細には速やかな吸液性能を発揮する吸液シートに
関するものである。TECHNICAL FIELD The present invention relates to a liquid-absorbent sheet using a highly water-absorbent polymer material, and more particularly to a liquid-absorbent sheet exhibiting rapid liquid-absorbing performance.
［従来の技術］ 生鮮食品の梱包資材や医療分野の廃棄物の吸液資材とし
て高吸水性高分子材料を使用した吸液シートが利用され
ている。[Prior Art] Liquid absorbent sheets using highly water-absorbent polymer materials are used as fresh food packaging materials and liquid absorbent materials for medical waste.
第４図は従来の吸液シートの積層構造例を示す一部断面
図であり、吸液シート１は透水性シート２，吸液層３及
び不透水性シート４を積層して構成され、前記透水性シ
ート２は不織布や孔明きプラスチックフィルム等によっ
て形成され、前記不透水性シート４はプラスチックフィ
ルム又はプラスチックラミネート紙等によって形成され
る。また上記吸液層３は粉砕パルプや繊維集合体中に高
吸水性高分子材料Ｐを分散して構成されている。該高吸
水性高分子材料Ｐとしては架橋構造を有するポリアクリ
ル酸塩等が利用される。FIG. 4 is a partial cross-sectional view showing an example of a laminated structure of a conventional liquid-absorbent sheet. A liquid-absorbent sheet 1 is constituted by laminating a water-permeable sheet 2, a liquid-absorbent layer 3 and a water-impermeable sheet 4, The water-permeable sheet 2 is formed of a non-woven fabric, a perforated plastic film or the like, and the water-impermeable sheet 4 is formed of a plastic film or plastic laminated paper or the like. Further, the liquid absorbing layer 3 is formed by dispersing the super absorbent polymer material P in pulverized pulp or fiber aggregate. As the superabsorbent polymer material P, a polyacrylate having a crosslinked structure or the like is used.
［発明が解決しようとする課題］ 第４図に示す様な構造の吸液シート１において液滴が高
吸水性高分子材料Ｐに吸収されるに当たっては、まず液
滴は透水性シート２の孔２ａを通過して吸液層３に至
り、該吸液層３を形成する粉砕パルプや繊維集合体に滲
み込み、最終的に高吸水性高分子材料Ｐに吸水されるこ
とになる。[Problems to be Solved by the Invention] In the liquid absorbing sheet 1 having a structure as shown in FIG. 4, when the liquid droplets are absorbed by the super absorbent polymer material P, first, the liquid droplets have pores in the water permeable sheet 2. After passing through 2a to reach the liquid-absorbing layer 3, the pulverized pulp or fiber aggregate forming the liquid-absorbing layer 3 is permeated and finally absorbed by the superabsorbent polymer material P.
ところが吸液シート１の一部に集中的して液滴が供給さ
れる様な場合、透水性シート２を形成する不織布又は吸
液層３を形成する粉砕パルプや繊維集合体の毛細管現象
により、供給される液の極一部は液滴供給点を中心とし
てその周囲に若干分散されるものの、この液滴供給点近
傍の高吸水性高分子材料に集中的に吸収されることにな
る。その結果吸液シート１における吸液状態は局部的な
ものとなっていた。すなわち吸液シート１の１箇所に多
量の液が流入してきたとき、吸液シート１の吸液能が有
効に活用されていなかった。However, when the liquid droplets are concentratedly supplied to a part of the liquid absorbent sheet 1, due to the non-woven fabric forming the water permeable sheet 2 or the pulverized pulp forming the liquid absorbent layer 3 or the capillary phenomenon of the fiber aggregate, Although a part of the supplied liquid is slightly dispersed around the droplet supply point around the droplet supply point, it is intensively absorbed by the superabsorbent polymer material near the droplet supply point. As a result, the liquid absorbing state of the liquid absorbing sheet 1 was localized. That is, when a large amount of liquid flowed into one location of the liquid absorbent sheet 1, the liquid absorbing ability of the liquid absorbent sheet 1 was not effectively utilized.
そこで本発明者らは、透水性シートを通過した液滴が高
吸水性高分子材料に吸収される前に、広い面積に拡げら
れ、同一部分に多量の液滴の流入があるときにおいて
も、速やかに全ての液滴を吸収できる吸液シートを提供
する目的で研究を重ね、本発明を完成した。Therefore, the present inventors spread the droplets that have passed through the water-permeable sheet to a large area before being absorbed by the superabsorbent polymer material, and even when a large amount of droplets flow into the same portion, The present invention has been completed by conducting studies for the purpose of providing a liquid absorbing sheet that can quickly absorb all droplets.
［課題を解決するための手段］ 上記の目的を達成した本発明は、２枚の吸水紙の間に高
吸水性高分子材料粉末を配した吸液層を、少なくとも片
面側を透水性シートによって形成した袋体の内部に収納
した吸液シートであって、上記透水性シートと吸液層の
間には上記吸水紙よりクレム吸水度の大きい易拡散性層
が配設されてなる点を要旨とするものである。[Means for Solving the Problems] In the present invention which has achieved the above-mentioned object, a liquid-absorbent layer in which a highly water-absorbent polymer material powder is arranged between two water-absorbent papers is provided with a water-permeable sheet on at least one side. A liquid-absorbent sheet housed inside a formed bag body, wherein an easily diffusible layer having a higher Klemm's water absorbency than the water-absorbent paper is disposed between the water-permeable sheet and the liquid-absorbent layer. It is what
［作用及び実施例］ 第１図は本発明の代表的な実施例を示す断面説明図であ
る。第４図の従来例と比較して特徴的な構成は、透水性
シート２と吸液層３の間に易拡散性層として易拡散性シ
ート６を配設した点にある。尚透水性シート２と不透水
性シート４はその周縁を熱融着又はホットメルト剤等の
接着剤によって接着し、これによって形成された袋体の
内部に上記易拡散性シート６及び吸液層３が収納されて
いる。[Operation and Examples] FIG. 1 is a cross-sectional explanatory view showing a typical example of the present invention. A characteristic configuration as compared with the conventional example of FIG. 4 is that an easily diffusible sheet 6 is provided as an easily diffusible layer between the water permeable sheet 2 and the liquid absorbing layer 3. The water-permeable sheet 2 and the water-impermeable sheet 4 are bonded at their peripheral edges with an adhesive such as a heat-sealing agent or a hot-melting agent, and the easily diffusible sheet 6 and the liquid-absorbing layer are formed inside the bag formed by this. 3 is stored.
上記透水性シート２としてはレーヨン，ポリプロピレ
ン，ポリエステル等を素材とする不織布や、或は円形，
矩形，スリット状の孔２ａを0.1〜１０％の開孔率で設
けたポリエチレンフィルム，ポリプロピレンフィルム，
ポリエステルフィルム，ナイロンフィルムを使用し、そ
の他天然繊維もしくは合成繊維よりなる織物，編物，ネ
ット等を用いても良い。また吸液層３としては、２枚の
不織布や薄葉紙等の吸水紙の間に、高吸水性高分子材料
粉末を分散保持させたものが用いられる。さらに高吸水
性高分子材料Ｐとしては５倍以上の吸水倍率を有するも
のを使用することが好ましく、例えばポリアクリル酸塩
架橋体、イソブチレン−無水マレイン酸共重合体ケン化
物，酢酸ビニル−アクリル酸エステル共重合体ケン化
物、或はでんぷん−アクリル酸グラフト重合体等を使用
することが推奨される。また不透水性シート４としては
プラスチックフィルム及びネット等で補強されたプラス
チックフィルム、プラスチックラミネート紙を利用する
ことが望ましい。さらに該吸液層３内には必要に応じて
消臭剤や防腐剤等を添加しておいても良い。As the water-permeable sheet 2, a non-woven fabric made of rayon, polypropylene, polyester or the like, or a circular shape,
A polyethylene film, a polypropylene film, in which rectangular and slit-shaped holes 2a are provided with a porosity of 0.1 to 10%,
A polyester film or a nylon film may be used, and a woven fabric, a knitted fabric, a net or the like made of natural fibers or synthetic fibers may be used. Further, as the liquid absorbing layer 3, there is used one in which a super absorbent polymer material powder is dispersed and held between two sheets of non-woven fabric or water absorbing paper such as thin paper. Further, as the super absorbent polymer material P, it is preferable to use one having a water absorption capacity of 5 times or more. For example, polyacrylic acid salt crosslinked product, isobutylene-maleic anhydride copolymer saponified product, vinyl acetate-acrylic acid. It is recommended to use saponified ester copolymer, or starch-acrylic acid graft polymer. As the water impermeable sheet 4, it is desirable to use a plastic film, a plastic film reinforced with a net or the like, or a plastic laminated paper. Further, a deodorant, a preservative or the like may be added to the liquid absorbing layer 3 if necessary.
一方易拡散性シート６は天然繊維又は合成繊維を素材と
する紙，不織布，織布によって形成され，供給される水
系液を厚さ方向よりも素早く四方に拡散させる性質を有
するものである。易拡散性層の拡散性を示す指標として
は、ＪＩＳＰ８１４１（１９６５）における紙の吸収度
試験方法により測定されるクレム吸水度によって判定す
ることができる。On the other hand, the easily diffusible sheet 6 is formed of paper, non-woven fabric, or woven fabric made of natural fibers or synthetic fibers, and has a property of diffusing the supplied water-based liquid in all directions more quickly than in the thickness direction. The index showing the diffusibility of the easily diffusible layer can be determined by the Klemm water absorption measured by the paper absorption test method in JISP8141 (1965).
本発明で用いられる易拡散性層は、吸液層を形成する吸
水紙などの材料よりもクレム吸水度が大きいことが必要
である。例えば坪量１６〜２１ｇ／m2の場合、吸水層を
形成する吸水紙のクレム吸水度は２０〜６０mm／１０分
間に対して、易拡散性層のクレム吸水度は７０mm／１０
分間以上、より好ましくは１００mm／１０分間以上のも
のを使用することが望まれる。上記条件を満足する易拡
散性層の代表的な例としては、木材繊維のうち松等の針
葉樹から得られる繊維長が２mm以上の長繊維を用いた易
拡散性の紙を挙げることができる。本発明における易拡
散性層の代表例は上記の如き易拡散性シートであるが、
該易拡散性紙と同様の機能を発揮するものであれば、特
に制限されるものではなく、例えばその他に繊維状物集
合体も易拡散性層として使用することができる。The easily diffusible layer used in the present invention needs to have a higher Klemm's water absorbency than a material such as water absorbent paper forming the liquid absorbing layer. For example, when the basis weight is 16 to 21 g / m 2 , the water absorption paper forming the water absorption layer has a Klemm water absorption of 20 to 60 mm / 10 minutes, while the easily diffusible layer has a Klemm water absorption of 70 mm / 10.
It is desired to use a material having a length of at least minutes, more preferably at least 100 mm / 10 minutes. A typical example of the easily diffusible layer satisfying the above conditions is easily diffusible paper using long fibers having a fiber length of 2 mm or more obtained from a conifer such as pine among wood fibers. A typical example of the easily diffusible layer in the present invention is the easily diffusible sheet as described above,
It is not particularly limited as long as it exhibits the same function as the easily diffusible paper, and, for example, a fibrous material aggregate can also be used as the easily diffusible layer.
また液滴の供給点が限定されており、液滴分散の必要な
方向が一定の場合には、繊維の配向方法を決めておき、
高吸水性高分子材料へ均等に吸収される様にしたもので
あっても良い。In addition, if the supply point of droplets is limited and the required direction of droplet dispersion is constant, the fiber orientation method is determined beforehand
It may be one that is evenly absorbed by the superabsorbent polymer material.
第２図は本発明の他の実施例を示す断面説明図、第３図
は第２図に示す吸液シートの全体を示す一部破断説明図
であり、吸液層３はエンボス加工されたものが使用され
ると共に、透水性シート２は縁部を折返して不透水性シ
ート４と接着し、この折返し内部まで吸液層３及び易拡
散性シート６を拡げて構成し、吸液可能面積をさらに高
めたものである。尚上記不透水性シート４に替えて透水
性シート２を両面に形成しても良く、その場合、該透水
性シート２と吸液層３裏面の間にも上記の易拡散性シー
ト６を配設することもでき、この様に吸液層３の両面に
易拡散性シート６を設けるときには、該易拡散シート６
は２つ折りに形成したものや、或は袋状にしたものであ
っても良い。2 is a cross-sectional explanatory view showing another embodiment of the present invention, FIG. 3 is a partially broken explanatory view showing the whole liquid-absorbent sheet shown in FIG. 2, and the liquid-absorbent layer 3 is embossed. As the water-permeable sheet 2 is used, the edges of the water-permeable sheet 2 are folded back and adhered to the water-impermeable sheet 4, and the liquid-absorbent layer 3 and the easily diffusible sheet 6 are spread to the inside of the folded back to form a liquid-absorbable area. Is further enhanced. The water-permeable sheet 2 may be formed on both sides in place of the water-impermeable sheet 4, and in that case, the easily diffusible sheet 6 is also arranged between the water-permeable sheet 2 and the back surface of the liquid absorbent layer 3. It is also possible to dispose the easily diffusible sheet 6 on both surfaces of the liquid absorbing layer 3 in this way.
May be formed in two folds or in a bag shape.
上記の本発明吸液シートは易拡散シートを吸液層３に当
接して配設する簡単な構造であるので、吸液シートの製
造工程や製造装置を複雑にするといったことはない。The liquid absorbent sheet of the present invention described above has a simple structure in which the easy diffusion sheet is disposed in contact with the liquid absorbent layer 3, so that the manufacturing process and the manufacturing apparatus of the liquid absorbent sheet are not complicated.
（実施例） 坪量２０ｇ／m2の２枚の薄葉紙［クレム吸水度（mm／１
０分間）；３５（縦），３７（横）］の間に吸水性樹脂
［日本触媒化学工業（株）製アクアリックＣＡ］を３０
ｇ／m2の割合で分散させてエンボス加工して吸液層３を
形成し、該吸液層３上にクレム吸水度１０３（縦），１
０２（横）（mm／１０分）の拡散紙を配し、さらにその
上に坪量２８ｇ／m2のポリエステル製不織布を積層し
た。そして上記吸水層３の他面側にはポリエチレンフィ
ルムを配設し、上記不織布とその周縁部を熱融着によっ
て接着し、吸液シートを作製した。また比較例として上
記拡散紙を設けない吸液シートを別に準備した。(Example) Two sheets of thin paper having a basis weight of 20 g / m 2 [Krem water absorption (mm / 1
0 minutes); 35 (vertical), 37 (horizontal)], and water absorbent resin [AQUALIC CA manufactured by Nippon Shokubai Kagaku Kogyo Co., Ltd.]
The liquid absorption layer 3 is dispersed at a rate of g / m 2 and embossed to form a liquid absorption layer 3. On the liquid absorption layer 3, the Klemm water absorption degree 103 (vertical), 1
A diffusion paper of 02 (width) (mm / 10 minutes) was placed, and a polyester nonwoven fabric having a basis weight of 28 g / m 2 was further laminated thereon. Then, a polyethylene film was provided on the other surface side of the water absorbing layer 3, and the nonwoven fabric and its peripheral portion were bonded by heat fusion to prepare a liquid absorbing sheet. As a comparative example, a liquid absorbing sheet without the diffusion paper was prepared separately.
そしてこれらの吸液シートの不織布面側に５mmの高さか
らピペットで青色に着色した水を１０滴滴下し、５分後
吸液層３の不織布側の着色面積を測定した。Then, 10 drops of blue-colored water were dropped from the height of 5 mm on the non-woven fabric side of these liquid-absorbent sheets with a pipette, and after 5 minutes, the non-woven fabric-side colored area of the liquid-absorbent layer 3 was measured.
その結果本発明実施例品では平均の着色面積は6.98cm2
となり、他方比較例の場合は4.05cm2となり、拡散紙を
設けることによって吸液面積を拡げられることが分かっ
た。As a result, in the product of the present invention, the average colored area was 6.98 cm 2.
On the other hand, in the case of the comparative example, it was 4.05 cm 2 , and it was found that the liquid absorbing area can be expanded by providing the diffusion paper.
［発明の効果］ 本発明は以上の様に構成されているので、透水性シート
を通過した液は速やかに広い面積に拡散されて確実に高
吸水性高分子材料に吸水され、吸液シートの一部分に集
中的な液供給があったときにもこれを素早く吸収してし
まうことができる様になった。EFFECTS OF THE INVENTION Since the present invention is configured as described above, the liquid that has passed through the water-permeable sheet is quickly diffused into a large area and reliably absorbed by the highly water-absorbent polymer material. It became possible to absorb this quickly even when there was a concentrated liquid supply in a part.
第１図は本発明の代表的な実施例を示す断面説明図、第
２図は本発明の他の実施例を示す断面説明図、第３図は
第２図に示す吸液シートの全体を示す一部破断説明図、
第４図は従来の吸液シート構造を示す断面説明図であ
る。 １……吸液シート、２……透水性シート ３……吸液層、４……不透水性シート ６……易拡散性シートFIG. 1 is a sectional explanatory view showing a typical embodiment of the present invention, FIG. 2 is a sectional explanatory view showing another embodiment of the present invention, and FIG. 3 shows the entire liquid-absorbent sheet shown in FIG. Partially broken explanatory diagram showing
FIG. 4 is a sectional explanatory view showing a conventional liquid absorbing sheet structure. 1 ... Liquid absorbing sheet, 2 ... Water permeable sheet, 3 ... Liquid absorbing layer, 4 ... Water impermeable sheet, 6 ... Easy diffusion sheet
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ６５Ｄ 81/26 Ｇ 9028−3Ｅ (56)参考文献 特開 平１−301239（ＪＰ，Ａ) 実開 平１−116628（ＪＰ，Ｕ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical indication location B65D 81/26 G 9028-3E (56) Reference JP-A-1-301239 (JP, A) Actual Kaihei 1-116628 (JP, U)
Claims (1)
末を配した吸液層を、少なくとも片面側を透水性シート
によって形成した袋体の内部に収納した吸液シートであ
って、上記透水性シートと吸液層の間には上記吸水紙よ
りクレム吸水度の大きい易拡散性層が配設されてなるこ
とを特徴とする吸液シート。1. A liquid-absorbent sheet in which a liquid-absorbent layer in which a highly water-absorbent polymer material powder is placed between two sheets of water-absorbent paper is housed inside a bag body having at least one surface formed of a water-permeable sheet. The liquid-absorbent sheet is characterized in that an easily diffusible layer having a higher Klemm's water absorbency than the water-absorbent paper is disposed between the water-permeable sheet and the liquid-absorbent layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170994A JPH0653225B2 (en) | 1989-06-30 | 1989-06-30 | Liquid absorbing sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170994A JPH0653225B2 (en) | 1989-06-30 | 1989-06-30 | Liquid absorbing sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0338248A JPH0338248A (en) | 1991-02-19 |
| JPH0653225B2 true JPH0653225B2 (en) | 1994-07-20 |
Family
ID=15915146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1170994A Expired - Lifetime JPH0653225B2 (en) | 1989-06-30 | 1989-06-30 | Liquid absorbing sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653225B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5780757B2 (en) * | 2010-12-27 | 2015-09-16 | 大王製紙株式会社 | Absorbent articles |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5713610U (en) * | 1980-06-28 | 1982-01-23 | ||
| JPS621298A (en) * | 1985-06-26 | 1987-01-07 | 松下電器産業株式会社 | Formation of via hole ceramic multilayer substrate |
| JPH01116628U (en) * | 1988-02-01 | 1989-08-07 | ||
| JPH01301239A (en) * | 1988-05-30 | 1989-12-05 | Mitsubishi Rayon Co Ltd | Laminate with water absorption property |
-
1989
- 1989-06-30 JP JP1170994A patent/JPH0653225B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0338248A (en) | 1991-02-19 |
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