JPH0533337Y2 - - Google Patents
Info
- Publication number
- JPH0533337Y2 JPH0533337Y2 JP1987184824U JP18482487U JPH0533337Y2 JP H0533337 Y2 JPH0533337 Y2 JP H0533337Y2 JP 1987184824 U JP1987184824 U JP 1987184824U JP 18482487 U JP18482487 U JP 18482487U JP H0533337 Y2 JPH0533337 Y2 JP H0533337Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- antibacterial
- sheet
- zeolite
- base material
- 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
- Laminated Bodies (AREA)
- Wrappers (AREA)
Description
〈産業上の利用分野〉
本考案は、抗菌性を有する吸水性・保水性シー
トに関し、食品等からのドリツプ吸収、生花の包
装、あるいは植物、茸類の育成促進用等に用いら
れるシートに関する。
〈従来の技術〉
従来この種のシートは、紙、不織布、あるいは
プラスチツクフイルム等からなる基材に、自重の
数十乃至数千倍の水分を吸収、保持するいわゆる
高吸水性樹脂を保持させたものが用いられてお
り、例えば特開昭57−103838号公報等がある。
上述した従来の技術によるシートは、多量の水
分を吸収、保持し、乾燥時には徐々に水分を放出
する性質を有しており、食品等からのドリツプを
吸収するためのシートとして、あるいは生花を包
装し長持ちさせる材料、また特殊な用途として
は、えのき茸等の人口栽培時に湿度調節材料とし
て用いられている。
〈考案が解決しようとする問題点〉
しかしながら、上記シートは一旦水分を吸収す
ると、長期にわたりその水分を保持し周囲の乾燥
を防ぐため、長期間使用した場合にはシートに付
着した雑菌やカビ等がシート上で増殖、発生して
しまつていた。雑菌、カビが増殖、発生したシー
トは、接触する食品や生花等に悪影響を与え、ま
た雰囲気を汚染するために、使用することができ
なくなり、廃棄さぜるを得なかつた。
〈問題点を解決するための手段〉
本考案は上記問題点に鑑みなされ、シート上に
雑菌やカビを増殖、発生させないものであつて、
少なくとも通気性・通水性材料からなる基材と、
高吸水性樹脂からなる吸水・保水層とを有する積
層体に、ゼオライトのイオン交換可能な金属の一
部を、銀、銅、または亜鉛から選ばれる少なくと
も一種の金属で置換して得られる抗菌性ゼオライ
トを保持させてなる積層体であつて、該抗菌性ゼ
オライトは空気に接触する位置に設けられている
ことを特徴とする、抗菌性を有する吸水性・保水
性シートである。
〈作用〉
本考案による抗菌性を有する吸水性・保水性シ
ートは、吸水・保水層が大量の水分を吸収、保持
し、雰囲気が乾燥した場合には徐々に水分を放出
する。
また、シートに保持された抗菌性ゼオライト
は、接触する空気中の酸素を活性化することによ
り抗菌性を発揮し、カビや雑菌の発生、増殖を防
ぐ。
〈実施例〉
次に、図面に基づいて本考案をさらに説明す
る。第１図は本考案の一実施例を示す断面図、第
２図は他の実施例を示す断面図である。
本考案で用いる基材１は、通気性および通水性
を有するものが用いられ、紙、不織布、プラスチ
ツク製微多孔膜等のほか、プラスチツクフイルム
に適宜方法にて無数の孔を設けたものも用いるこ
とができる。さらに必要に応じてこれら材料の積
層物であつてもよい。
吸水・保水層２は、本質的には高吸水性樹脂５
からなり、必要に応じて接着性バインダー、無機
充填剤等を添加することができる。
吸水・保水層２を設けるには、基材１上等に、
前記吸水性樹脂５を塗布する等により可能であ
る。また、２枚の基材１、あるいは第２図の如く
基材１と他のフイルム状材料６との間に高吸水性
樹脂５を挟持させてもかまわない。この場合には
接着剤７をパターンコートし、接着剤７のない部
分に高吸水性樹脂を設ける方法が可能である。
本考案による吸水性・保水性シートは、上記し
た基材１、吸水・保水層２を少なくとも有するシ
ートに、さらに抗菌性ゼオライト３を保持させて
なる。
本考案でいう抗菌性ゼオライト３とは、特開昭
60−181002号公報、特開昭60−100504号公報等に
示される、ゼオライト中に含まれるイオン交換可
能な金属の一部、実質的には全部を、銀、銅、ま
たは亜鉛から選ばれる少なくとも一種の金属によ
りイオン交換して得られるものである。
シートに抗菌性ゼオライト３を保持させるに
は、種々の方法が可能である。
基材１に直接抗菌性ゼオライト３を保持させる
場合は、抄紙あるいは製膜段階において、基材原
料中に混合可能な程度に粉砕した抗菌性ゼオライ
ト３を、適宜量混合すればよい。この際必要に応
じて接着性バインダーを添加することができる。
基材１上に抗菌性ゼオライト３を保持させるに
は、第１図に示す如く、塗料等に抗菌性ゼオライ
ト３を混合分散し、吹き付け、塗布、あるいは印
刷等の方法によりコーテイングして抗菌層４を設
けることによつても可能である。
また、シートに抗菌性ゼオライト３を保持させ
るには、第２図に示すように、吸水・保水層２を
形成する高吸水性樹脂中に抗菌性ゼオライト３を
混合させてもよい。
抗菌性ゼオライト３を保持させる位置は、少な
くとも空気が接触する位置でなければならない。
これは前述のように抗菌性ゼオライト３の抗菌性
は、空気中の酸素を活性化することにより得られ
るものであるためである。
また、抗菌性ゼオライト３を設ける位置は、吸
水・保水層２、や基材１が紙、不織布等の場合の
基材１等の、カビや雑菌の発生、増殖し易い層に
隣接して設けられることが好ましい。これは、抗
菌性ゼオライト３の抗菌力の及ぶ範囲が、１乃至
数mm程度のためである。もちろん、抗菌性ゼオラ
イト３は上述した方法により、複数の位置に設け
られてもよい。
次に、第１図に示した実施例の作成例を説明す
る。
紙からなる基材１上に、抗菌性ゼオライト３に
接着性バインダーを混合してなる塗料を、約
15μm塗布して抗菌層４を設けた。該抗菌層４上
に、デンプン−アクリル酸グラフトポリマーから
なる高吸水性樹脂５を、接着性バインダーと共に
固形分2.5ｇ／m2噴霧塗布し、吸水・保水層２を
設けた。これとは別に、製造時に抗菌性ゼオライ
ト３を約３重量％混合した不織布からなる基材
１′を準備し、該基材１′を、前述のように作成し
たシートの吸水・保水層２上に接着剤７を介して
積層し、本考案による抗菌性を有する吸水性・保
水性シートを作成した。
以上のようにして得られた抗菌性を有する吸
水・保水性シートの抗菌性を調べるために、シー
トに十分水分を吸収させた後、シートの両面に、
(イ) 黄色ブドウ球菌（106／c.c.濃度）懸濁液
(ロ) 黒コウジカビ胞子（106／c.c.濃度）懸濁液
をそれぞれ10c.c.／100cm2噴霧し、37℃恒温槽内で
所定時間培養した。また、比較のために抗菌性ゼ
オライト３を含有しない同構成のシートを作成
し、同様に試験した。結果を下表に示す。
<Industrial Application Field> The present invention relates to a water-absorbing/water-retaining sheet having antibacterial properties, and relates to a sheet used for absorbing drips from foods, wrapping fresh flowers, or promoting the growth of plants and mushrooms. <Conventional technology> Conventionally, this type of sheet has a base material such as paper, nonwoven fabric, or plastic film that holds a so-called super absorbent resin that absorbs and retains water tens to thousands of times its own weight. For example, Japanese Unexamined Patent Publication No. 103838/1983 has been used. The conventional sheet described above has the property of absorbing and retaining a large amount of moisture and gradually releasing moisture when dried, and can be used as a sheet for absorbing drips from food, etc., or for wrapping fresh flowers. It is used as a material to make it last longer, and as a special purpose, it is used as a humidity regulating material when cultivating enoki mushrooms and other crops. <Problems to be solved by the invention> However, once the above-mentioned sheet absorbs moisture, it retains that moisture for a long time and prevents the surrounding area from drying out, so if it is used for a long period of time, bacteria and mold may adhere to the sheet. had grown and occurred on the sheet. The sheets on which bacteria and mold have grown have an adverse effect on foods and fresh flowers that come into contact with them, and also pollute the atmosphere, making them unusable and having to be discarded. <Means for solving the problems> The present invention was created in view of the above problems, and does not allow the growth or generation of bacteria or mold on the sheet.
A base material made of at least a breathable/water permeable material;
Antibacterial properties obtained by replacing part of the ion-exchangeable metal of zeolite with at least one metal selected from silver, copper, or zinc in a laminate having a water absorption/water retention layer made of a super absorbent resin. This is a water-absorbing/water-retaining sheet having antibacterial properties, which is a laminate that holds zeolite, and is characterized in that the antibacterial zeolite is provided at a position where it comes into contact with air. <Function> In the water-absorbing/water-retaining sheet with antibacterial properties according to the present invention, the water-absorbing/water-retaining layer absorbs and retains a large amount of moisture, and gradually releases moisture when the atmosphere is dry. In addition, the antibacterial zeolite held in the sheet exhibits antibacterial properties by activating oxygen in the air it comes into contact with, thereby preventing the generation and proliferation of mold and other bacteria. <Example> Next, the present invention will be further explained based on the drawings. FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a sectional view showing another embodiment. The base material 1 used in the present invention is one that has air permeability and water permeability, and in addition to paper, nonwoven fabric, microporous plastic membrane, etc., a plastic film with countless holes formed by an appropriate method can also be used. be able to. Furthermore, a laminate of these materials may be used as necessary. The water absorption/water retention layer 2 is essentially a super absorbent resin 5
An adhesive binder, an inorganic filler, etc. can be added as necessary. To provide the water absorption/water retention layer 2, on the base material 1, etc.
This can be done by applying the water-absorbing resin 5, etc. Further, the superabsorbent resin 5 may be sandwiched between two base materials 1 or between the base material 1 and another film-like material 6 as shown in FIG. In this case, a method is possible in which the adhesive 7 is pattern-coated and the superabsorbent resin is provided in the areas where the adhesive 7 is not present. The water-absorbing/water-retaining sheet according to the present invention includes a sheet having at least the base material 1 and the water-absorbing/water-retaining layer 2 described above, and further retaining antibacterial zeolite 3. The antibacterial zeolite 3 referred to in this invention is
60-181002, JP-A-60-100504, etc., a part or substantially all of the ion-exchangeable metals contained in zeolite are at least selected from silver, copper, or zinc. It is obtained by ion exchange with a type of metal. Various methods can be used to retain the antibacterial zeolite 3 in the sheet. When the antibacterial zeolite 3 is held directly in the base material 1, an appropriate amount of the antibacterial zeolite 3 that has been crushed to a level that can be mixed into the base material raw material may be mixed in the paper making or film forming stage. At this time, an adhesive binder can be added if necessary. In order to hold the antibacterial zeolite 3 on the base material 1, as shown in FIG. This is also possible by providing Furthermore, in order to retain the antibacterial zeolite 3 in the sheet, the antibacterial zeolite 3 may be mixed into the super water absorbent resin forming the water absorption/water retention layer 2, as shown in FIG. The position where the antibacterial zeolite 3 is held must be at least a position where air comes into contact with it.
This is because, as mentioned above, the antibacterial properties of antibacterial zeolite 3 are obtained by activating oxygen in the air. In addition, the antibacterial zeolite 3 should be placed adjacent to layers where mold and other bacteria are likely to grow and multiply, such as the water absorption/water retention layer 2 or the base material 1 when the base material 1 is paper, nonwoven fabric, etc. It is preferable that This is because the range of antibacterial activity of antibacterial zeolite 3 is about 1 to several mm. Of course, the antibacterial zeolite 3 may be provided at multiple locations by the method described above. Next, an example of creating the embodiment shown in FIG. 1 will be described. A paint consisting of antibacterial zeolite 3 mixed with an adhesive binder is applied onto a base material 1 made of paper.
Antibacterial layer 4 was provided by coating 15 μm. On the antibacterial layer 4, a superabsorbent resin 5 made of a starch-acrylic acid graft polymer was spray-coated with a solid content of 2.5 g/m 2 together with an adhesive binder to provide a water absorbing/water retaining layer 2. Separately, a base material 1' made of a nonwoven fabric mixed with about 3% by weight of antibacterial zeolite 3 during manufacturing is prepared, and the base material 1' is placed on the water absorbing/water retaining layer 2 of the sheet prepared as described above. The antibacterial water-absorbing/water-retaining sheet according to the present invention was prepared by laminating the sheets with adhesive 7 in between. In order to examine the antibacterial properties of the antibacterial water-absorbing/water-retaining sheet obtained as described above, after the sheet had sufficiently absorbed moisture, (a) Staphylococcus aureus (10 6 / cc concentration) suspension (b) A suspension of Aspergillus niger spores (10 6 /cc concentration) was sprayed at 10 c.c./100 cm 2 , respectively, and cultured in a constant temperature bath at 37°C for a predetermined period of time. In addition, for comparison, a sheet with the same structure that did not contain antibacterial zeolite 3 was prepared and tested in the same manner. The results are shown in the table below.
【表】【table】
【表】
〈考案の効果〉
本考案は以上述べた構成からなり、シートに付
着した雑菌やカビ等は、抗菌性ゼオライトの抗菌
力により静菌乃至殺菌され、シート自体が汚染さ
れて使用できなくなることがなく、また雰囲気を
汚染することがない。また、茸類の人口栽培にお
ける調湿材料として用いた場合でも、抗菌力はシ
ートのごく表面付近のみで作用するので、茸類の
育成を阻害することもない。[Table] <Effects of the invention> The present invention has the above-mentioned configuration, and the bacteria and mold that adhere to the sheet are bacteriostatic or sterilized by the antibacterial power of the antibacterial zeolite, and the sheet itself becomes contaminated and becomes unusable. There is no risk of pollution and the atmosphere will not be polluted. Furthermore, even when used as a humidity control material in the artificial cultivation of mushrooms, the antibacterial activity acts only near the surface of the sheet, so the growth of mushrooms will not be inhibited.
第１図は本考案の一実施例を示す断面図、第２
図は他の実施例を示す断面図である。
１……基材、２……吸水・保水層、３……抗菌
性ゼオライト、４……抗菌層、５……高吸水性樹
脂。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view showing another embodiment. 1...Base material, 2...Water absorption/water retention layer, 3...Antibacterial zeolite, 4...Antibacterial layer, 5...Super water absorbent resin.
Claims (1)
と、高吸水性樹脂からなる吸水・保水層とを有す
る積層体に、ゼオライトのイオン交換可能な金属
の一部を、銀、銅、または亜鉛から選ばれる少な
くとも一種の金属で置換して得られる抗菌性ゼオ
ライトを保持させてなる積層体であつて、該抗菌
性ゼオライトは空気に接触する位置に設けられて
いることを特徴とする、抗菌性を有する吸水性・
保水性シート。 A part of the ion-exchangeable metal of the zeolite is selected from silver, copper, or zinc in a laminate having at least a base material made of an air-permeable/water-permeable material and a water-absorbing/water-retaining layer made of a super-absorbent resin. A laminate comprising an antibacterial zeolite obtained by substitution with at least one metal, the antibacterial zeolite having antibacterial properties, characterized in that the antibacterial zeolite is provided at a position where it comes into contact with air. Water absorbency/
Water-retentive sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987184824U JPH0533337Y2 (en) | 1987-12-03 | 1987-12-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987184824U JPH0533337Y2 (en) | 1987-12-03 | 1987-12-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0189128U JPH0189128U (en) | 1989-06-13 |
| JPH0533337Y2 true JPH0533337Y2 (en) | 1993-08-25 |
Family
ID=31476161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987184824U Expired - Lifetime JPH0533337Y2 (en) | 1987-12-03 | 1987-12-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0533337Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0744622Y2 (en) * | 1988-08-19 | 1995-10-11 | 大日本印刷株式会社 | Package for keeping freshness |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521203A (en) * | 1978-08-01 | 1980-02-15 | Mitsui Zellerbach Kk | Sheet for absorption |
| JPS59133235A (en) * | 1983-01-21 | 1984-07-31 | Kanebo Ltd | Zeolite particle-containing polymer and its production |
| US4529188A (en) * | 1983-07-05 | 1985-07-16 | Xerox Corporation | Sheet feeding and registration apparatus |
| JPS61138658A (en) * | 1984-12-11 | 1986-06-26 | Kanebo Ltd | Antifungal polyurethane film |
-
1987
- 1987-12-03 JP JP1987184824U patent/JPH0533337Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0189128U (en) | 1989-06-13 |
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