JP2001026466A - Manufacture of antibacterial glass - Google Patents
Manufacture of antibacterial glassInfo
- Publication number
- JP2001026466A JP2001026466A JP11199567A JP19956799A JP2001026466A JP 2001026466 A JP2001026466 A JP 2001026466A JP 11199567 A JP11199567 A JP 11199567A JP 19956799 A JP19956799 A JP 19956799A JP 2001026466 A JP2001026466 A JP 2001026466A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- silver
- antibacterial
- powder containing
- liquid
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/005—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to introduce in the glass such metals or metallic ions as Ag, Cu
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2204/00—Glasses, glazes or enamels with special properties
- C03C2204/02—Antibacterial glass, glaze or enamel
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は抗菌ガラスの製造方
法に係り、特に、比較的簡便な操作で容易かつ効率的に
ガラス表面に銀イオンを拡散させて抗菌ガラスを製造す
る方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an antibacterial glass, and more particularly to a method for producing an antibacterial glass by diffusing silver ions into a glass surface easily and efficiently by relatively simple operation.
【０００２】[0002]
【従来の技術】銀イオンや銅イオンが優れた抗菌性を有
することは知られており、銀イオンや銅イオンを導入す
ることで抗菌性を付与した抗菌ガラスが提供されてい
る。2. Description of the Related Art It is known that silver ions and copper ions have excellent antibacterial properties, and antibacterial glasses provided with antibacterial properties by introducing silver ions and copper ions have been provided.
【０００３】例えば、ガラス組成中に銀イオンを導入し
たバルク抗菌ガラスが知られている（特開平７−４８１
４２号公報，同７−３００３３９号公報）。しかし、こ
のようなバルク抗菌ガラスは、使用する銀イオンの量が
多く、高価格であるという欠点がある。即ち、ガラスは
その表面層のみ抗菌性を有するものであれば良く、内部
にまで銀イオンによる抗菌性を付与する必要はないが、
バルク抗菌ガラスでは、その全体に銀イオンを導入する
ため、無駄になる銀イオン量が多く不経済である。[0003] For example, a bulk antibacterial glass in which silver ions are introduced into a glass composition is known (JP-A-7-481).
No. 42, No. 7-300399). However, such a bulk antibacterial glass has a drawback that it uses a large amount of silver ions and is expensive. That is, the glass only needs to have antibacterial properties only on its surface layer, and it is not necessary to impart antibacterial properties by silver ions to the inside,
In the bulk antibacterial glass, silver ions are introduced into the whole, so that the amount of waste silver ions is large and uneconomical.
【０００４】これに対して、ガラス表面にのみ銀イオン
を拡散させて抗菌性を付与した抗菌ガラスも提案されて
おり、例えば次のようなものがある。 銀を蒸発させ、銀の蒸発雰囲気下でガラス組成物中
に銀を拡散させる方法（特開平９−６７１４３号公報） ガラス表面のアルカリイオンを溶融塩中の銀イオン
とイオン交換させる方法（特開平１０−１５８０３７号
公報） 銀等の抗菌成分を含む液を表面に塗布し、その後加
熱処理する方法（特開平１０−０１５０４１号公報）On the other hand, an antibacterial glass in which silver ions are diffused only on the glass surface to impart antibacterial properties has been proposed, for example, as follows. A method of evaporating silver and diffusing silver into a glass composition under an atmosphere of silver evaporation (Japanese Patent Application Laid-Open No. 9-67143) A method of ion-exchanging alkali ions on a glass surface with silver ions in a molten salt (Japanese Patent Application Laid-Open No. Hei 9-67143). No. 10-158037) A method of applying a liquid containing an antibacterial component such as silver to the surface and then performing a heat treatment (Japanese Patent Laid-Open No. 10-015041).
【０００５】[0005]
【発明が解決しようとする課題】このように、ガラスの
表面にのみ銀イオンを拡散させたものであれば、バルク
抗菌ガラスに比べて銀イオンの必要量を低減することが
できることが予想されるが、上記〜の従来法は、い
ずれも次のような欠点を有し、工業的、経済的に十分に
満足し得る方法とは言えなかった。As described above, if silver ions are diffused only to the surface of glass, it is expected that the required amount of silver ions can be reduced as compared with bulk antibacterial glass. However, all of the above-mentioned conventional methods have the following drawbacks and cannot be said to be methods that can be sufficiently satisfied industrially and economically.
【０００６】即ち、の方法では、銀の蒸発雰囲気中で
無駄になる銀イオンが多く、やはり不経済であった。ま
た、の方法では、溶融塩に浸漬する前のガラスの洗
浄、ガラスの溶融塩への浸漬のための工業プロセスが必
要であるため、初期投資及びランニングコストが高くつ
き、また、ガラス中のアルカリイオンと銀イオンとをイ
オン交換させるために比較的高温での処理（一般的に３
００℃以上）が必要となる。このように高温処理を行う
ことは、加熱コストや耐熱設備コストの面でも不利であ
る上に、高温処理を行うと、銀イオンのガラス表面への
拡散長が長くなり、銀がコロイド化するなどしてガラス
が黄色に着色する可能性も有り、高品質のガラスを得る
ことができないという欠点もあった。の方法であれ
ば、比較的低温（２００℃以上）の加熱処理で済むが、
塗布後に加熱操作が必要なため、このための熱源が必要
であり、やはり加熱コスト、設備コストの面で不利であ
った。That is, in the method (1), a large amount of silver ions are wasted in the silver evaporation atmosphere, which is also uneconomical. In addition, the method requires an industrial process for washing the glass before immersion in the molten salt and immersing the glass in the molten salt, so that initial investment and running costs are high, and alkali in the glass is also required. Treatment at a relatively high temperature in order to exchange ions with silver ions (generally 3
00 ° C. or higher). Performing high-temperature treatment in this way is disadvantageous in terms of heating cost and heat-resistant equipment cost.In addition, when high-temperature treatment is performed, the diffusion length of silver ions to the glass surface becomes longer, and silver becomes colloidal. As a result, the glass may be colored yellow, and there is a disadvantage that high quality glass cannot be obtained. In the case of the method described above, heat treatment at a relatively low temperature (200 ° C. or higher) is sufficient.
Since a heating operation is required after coating, a heat source for this is necessary, which is disadvantageous in terms of heating cost and equipment cost.
【０００７】本発明は上記従来の問題点を解決し、特別
な設備を必要とすることなく、簡便な操作で安価にしか
も短時間で効率的に抗菌ガラスを製造する方法を提供す
ることを目的とする。An object of the present invention is to solve the above-mentioned conventional problems and to provide a method for producing an antibacterial glass efficiently at a low cost in a short time with a simple operation without requiring special equipment. And
【０００８】[0008]
【課題を解決するための手段】本発明の抗菌ガラスの製
造方法は、ガラス表面に銀イオンを拡散させて抗菌ガラ
スを製造する方法において、加熱されたガラスの表面に
銀を含む液又は粉体を接触させることを特徴とする。According to the present invention, there is provided a method for producing an antibacterial glass, comprising the steps of: diffusing silver ions on a glass surface to produce the antibacterial glass; Are brought into contact with each other.
【０００９】本発明に従って、加熱されたガラスの表面
に銀を含む液又は粉体を直接接触させることにより瞬時
にガラス表面に銀イオンを拡散・定着させることができ
る。According to the present invention, silver ions can be instantaneously diffused and fixed on the glass surface by bringing the liquid or powder containing silver into direct contact with the heated glass surface.
【００１０】このような本発明の方法は、１００℃以上
でガラスの歪み点以下、好ましくは１５０〜３５０℃の
比較的低温で実施可能であり、例えば下記の（１）又は
（２）を採用することにより、ガラスの製造ライン又は
加熱加工工程で簡便に抗菌化を行うことができる。[0010] Such a method of the present invention can be carried out at a relatively low temperature of 100 ° C or higher and a glass strain point or lower, preferably 150 to 350 ° C. For example, the following (1) or (2) is employed. By doing so, antibacterialization can be easily performed in a glass production line or a heat processing step.
【００１１】（１） ガラスを溶融、成形及び徐冷して
製品ガラスを製造するに当り、該徐冷工程のガラスの表
面に銀を含む液又は粉体を接触させる。 （２） ガラスの加熱加工工程において、ガラスの表面
に銀を含む液又は粉体を接触させる。(1) In producing a product glass by melting, shaping and gradually cooling the glass, a liquid or powder containing silver is brought into contact with the surface of the glass in the slow cooling step. (2) In the glass heating process, a liquid or powder containing silver is brought into contact with the surface of the glass.
【００１２】即ち、上記（１）の方法では、ガラスの通
常の工業的製造ラインにおける溶融−成形−徐冷−加工
の一連の流れにおいて、徐冷工程中にそのガラスが持つ
熱エネルギーを利用して、単にガラス表面に銀を含む液
又は粉体をスプレーするなどして接触させることによ
り、簡便にかつ瞬時に抗菌ガラスを製造することができ
る。That is, in the above method (1), the thermal energy of the glass is utilized during the slow cooling step in a series of melt-forming-slow-cooling-processing flows in a normal industrial production line for glass. The antibacterial glass can be easily and instantaneously manufactured by simply contacting the glass surface with a liquid or powder containing silver by spraying or the like.
【００１３】また、上記（２）の方法では、ガラスの通
常の工業的製造ラインにおける曲げ強化、合わせガラス
製造工程等のガラスの加熱加工工程において、ガラスが
持つ熱エネルギーを利用して、単にガラス表面に銀を含
む液又は粉体をスプレーするなどして接触させることに
より、簡便にかつ瞬時に抗菌ガラスを製造することがで
きる。In the above method (2), in the glass heating process such as a bending strengthening process and a laminated glass manufacturing process in a general industrial production line of glass, the glass is simply utilized by utilizing the heat energy of the glass. An antibacterial glass can be easily and instantaneously manufactured by spraying a liquid or powder containing silver on the surface, for example.
【００１４】本発明の抗菌ガラスの製造方法では、上記
処理により、銀イオンの拡散深さが、ガラス表面から
０．０５〜１０ミクロン、特に０．０５〜２ミクロンの
範囲となるように銀イオンを拡散させるのが好ましい。In the method for producing an antibacterial glass of the present invention, the silver ion is diffused by the above treatment so that the silver ion has a diffusion depth of 0.05 to 10 μm, particularly 0.05 to 2 μm from the glass surface. Is preferably diffused.
【００１５】[0015]
【発明の実施の形態】以下に本発明の抗菌ガラスの製造
方法の実施の形態を詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method for producing an antibacterial glass of the present invention will be described below in detail.
【００１６】本発明において、抗菌化処理に用いる銀を
含む液又は粉体としては、銀、銀・銅合金等の銀合金、
クエン酸銀等の有機銀化合物、塩化銀、硫化銀、酸化
銀、硫酸銀等の無機銀化合物等（以下、これらを「銀系
材料」と称す。）が挙げられ、これらのうちの１種を単
独で或いは２種以上を併用して用いることができる。In the present invention, the liquid or powder containing silver used for the antibacterial treatment includes silver, silver alloys such as silver-copper alloy, and the like.
Organic silver compounds such as silver citrate; and inorganic silver compounds such as silver chloride, silver sulfide, silver oxide, and silver sulfate (hereinafter, these are referred to as “silver-based materials”). Can be used alone or in combination of two or more.
【００１７】銀を含む液としては、具体的には、銀コロ
イドや、銀合金、上記有機銀化合物又は無機銀化合物等
の銀系材料の水分散液、アルコール水溶液分散液、アル
コール分散液、他の有機溶媒分散液等が挙げられ、この
ような分散液中の銀系材料の粒子径は１０ミクロン以
下、特に０．１ミクロン以下の微粒子であることが、ガ
ラス表面上への拡散固定化の面で好ましい。また、これ
らの分散液中の銀系材料の濃度は０．０１〜３重量％で
あることが好ましい。この濃度が０．０１重量％未満で
は抗菌化処理を行っても十分な抗菌性を得ることができ
ず３重量％よりも高濃度であるとガラス表面に銀系材料
粒子が付着し、銀イオンがガラス表面に拡散固定化され
なくなる。Examples of the liquid containing silver include a silver colloid, a silver alloy, an aqueous dispersion of a silver-based material such as the organic silver compound or the inorganic silver compound, an aqueous alcohol solution, an alcohol dispersion, and the like. Organic solvent dispersion, etc., and the particle diameter of the silver-based material in such a dispersion is 10 μm or less, particularly 0.1 μm or less, for the diffusion fixation on the glass surface. Preferred in terms of surface. The concentration of the silver-based material in these dispersions is preferably 0.01 to 3% by weight. If the concentration is less than 0.01% by weight, sufficient antibacterial properties cannot be obtained even if antibacterial treatment is performed. If the concentration is higher than 3% by weight, silver-based material particles adhere to the glass surface, and Is not fixed to the glass surface by diffusion.
【００１８】また、銀を含む粉体としては、上記銀系材
料の粒子とセルロース等の上記銀系材料粒子と反応しな
い粒子等の混合粉体を用いることができ、この粉体にお
いても、上記と同様の理由から銀系材料の粒子の粒子径
は１０ミクロン以下、特に０．１ミクロン以下で、その
濃度は０．０１〜３重量％であることが好ましい。As the powder containing silver, a mixed powder of particles of the silver-based material and particles that do not react with the silver-based material particles such as cellulose can be used. For the same reason as described above, the particle diameter of the silver-based material particles is preferably 10 μm or less, particularly 0.1 μm or less, and the concentration is preferably 0.01 to 3% by weight.
【００１９】このような銀を含む液又は粉体を熱したガ
ラス表面に接触させる方法としては特に制限はないが、
熱割れを防ぐ目的から接触面積を小さくするために、ス
プレー法、パイロゾル法等の霧化方法が好ましい。ただ
し、接触式のロールコート、フローコーター等の方法で
も熱割れを防げれば採用することができる。The method of bringing the liquid or powder containing silver into contact with the heated glass surface is not particularly limited.
In order to reduce the contact area for the purpose of preventing thermal cracking, atomization methods such as a spray method and a pyrosol method are preferable. However, a method such as a contact-type roll coat or a flow coater can be adopted as long as it can prevent thermal cracking.
【００２０】なお、銀を含む液又は粉体のガラスへの供
給量は、用いる液又は粉体の銀系材料濃度等によっても
異なるが、通常の場合５〜３００ｇ／ｍ2程度とされ
る。The amount of the liquid or powder containing silver to be supplied to the glass varies depending on the concentration of the silver-based material in the liquid or powder to be used, but is usually about 5 to 300 g / m 2 .
【００２１】本発明においては、銀を含む液又は粉体を
熱したガラス表面に接触させて銀イオンをガラスの表面
層に拡散固定化するが、この銀イオンの拡散距離は、ガ
ラス表面から０．０５〜１０ミクロン、特に０．０５〜
２ミクロンであることが好ましい。この拡散距離が０．
０５ミクロンより少ないと、抗菌性の均質性、長期持続
性等に問題を生じる恐れがある。逆に、この拡散距離が
１０ミクロンを超えると、無駄な銀イオン量が多くなっ
て不経済であり、また、ガラス中で銀イオンがコロイド
化して黄色に着色する可能性がある。ガラス表面に均一
に銀イオンを固定化すると共に、効率良く抗菌性能を発
現させるためには、この拡散距離は特に０．０５〜２ミ
クロンであることが好ましい。In the present invention, a silver-containing liquid or powder is brought into contact with the heated glass surface to diffuse and fix silver ions to the surface layer of the glass. 0.05 to 10 microns, especially 0.05 to
Preferably it is 2 microns. If this diffusion distance is 0.
If it is less than 05 microns, problems may occur in the antimicrobial homogeneity, long-term durability and the like. Conversely, if the diffusion distance exceeds 10 microns, the amount of useless silver ions increases, which is uneconomical, and silver ions may become colloidal in the glass and become yellow. In order to uniformly immobilize silver ions on the glass surface and efficiently exhibit antibacterial performance, the diffusion distance is particularly preferably 0.05 to 2 microns.
【００２２】また、銀を含む液又は粉体を接触させると
きのガラスの温度については、ガラス表面に銀イオンを
固定化するために一般的には１００℃以上であることが
必要とされ、また、後工程の切断加工に影響を及ぼさな
いように、ガラスの歪み点以下（板硝子の場合約５００
℃）であることが好ましい。切断加工や抗菌性付与の面
からは、特に、このガラス温度は１５０〜３５０℃であ
ることが望ましい。この温度が３５０℃を超えるとガラ
ス中への銀イオンの拡散距離が長くなり、無駄になる銀
イオン量が増える。また、ガラスの製造工程で変形等の
可能性が増加し、切断等に影響を及ぼす。更には、熱衝
撃によるガラス冷却割れ等が生じ、工業的に不利であ
る。逆に、１５０℃未満であると、部分的に即ち不均質
に銀イオンがガラス表面に固定化する。或いは拡散距離
が短く、抗菌性能が不均質となり、抗菌性の耐久性に問
題を生じる。The temperature of the glass when the liquid or powder containing silver is brought into contact is generally required to be 100 ° C. or higher in order to fix silver ions on the glass surface. Below the strain point of the glass (approximately 500
C). From the viewpoint of cutting and imparting antibacterial properties, it is particularly desirable that the glass temperature is 150 to 350 ° C. If this temperature exceeds 350 ° C., the diffusion distance of silver ions into the glass becomes long, and the amount of waste silver ions increases. Further, the possibility of deformation and the like in the glass manufacturing process increases, which affects cutting and the like. Further, glass cooling cracks and the like due to thermal shock occur, which is industrially disadvantageous. Conversely, when the temperature is lower than 150 ° C., silver ions are partially or heterogeneously immobilized on the glass surface. Alternatively, the diffusion distance is short, the antibacterial performance becomes heterogeneous, and a problem occurs in the durability of the antibacterial property.
【００２３】本発明の方法は、例えば、下記（１）又は
（２）の方法で、一連のガラス製造工程或いは加熱加工
工程の熱を利用して実施することができる。The method of the present invention can be carried out, for example, by the following method (1) or (2), utilizing the heat of a series of glass manufacturing steps or heat processing steps.
【００２４】（１） ガラスを溶融、成形及び徐冷して
製品ガラスを製造するに当り、該徐冷工程のガラスの表
面に銀を含む液又は粉体を接触させる。 （２） ガラスの加熱加工工程において、ガラスの表面
に銀を含む液又は粉体を接触させる。(1) In producing a product glass by melting, shaping and slowly cooling the glass, a liquid or powder containing silver is brought into contact with the surface of the glass in the slow cooling step. (2) In the glass heating process, a liquid or powder containing silver is brought into contact with the surface of the glass.
【００２５】本発明において、処理対象となるガラスの
ガラス組成に特に制限はなく、また、ガラス表面にはコ
ーティング膜が形成されていても良い。即ち、例えば、
珪酸塩ガラスではアルカリイオンとイオン交換すること
により銀イオン拡散すると考えられているが、本発明で
はそれ以外のガラス、例えば、ＴｉＯ2−ＳｉＯ2膜のよ
うにガラス表面にアルカリを含まないコーティング層が
数百ｎｍの膜厚で形成されているものであっても良い。In the present invention, the glass composition of the glass to be treated is not particularly limited, and a coating film may be formed on the glass surface. That is, for example,
In silicate glass, it is considered that silver ions are diffused by ion exchange with alkali ions. However, in the present invention, other glass, for example, a coating layer containing no alkali on the glass surface such as a TiO 2 —SiO 2 film. May be formed with a thickness of several hundred nm.
【００２６】なお、本発明の方法では、銀イオンをガラ
ス表面に拡散させることで抗菌性を付与するものである
が、本発明の方法は、このように銀イオンを導入するこ
とにより光加工性を付与した基板の製造にも有効であ
る。In the method of the present invention, antibacterial properties are imparted by diffusing silver ions to the glass surface. However, in the method of the present invention, the photoprocessability is improved by introducing silver ions. It is also effective in the production of a substrate provided with.
【００２７】[0027]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００２８】なお、以下の実施例及び比較例において、
得られたサンプルの抗菌性の評価は次の方法で行った。In the following Examples and Comparative Examples,
The antibacterial property of the obtained sample was evaluated by the following method.
【００２９】〔抗菌性の評価方法〕抗菌製品技術協議会
提唱の抗菌力試験法Ｉ（１９９８年度版）のフィルム密
着法をガラス向けに変更して実施（フィルム無し、菌滴
下量０．１ｍＬに変更）。無加工サンプルはそれぞれの
液をスプレーしないものをブランク比較用のサンプルと
した。試験菌は黄色ブドウ球菌及び大腸菌を使用し、栄
養分は１／５００ＮＢ増殖条件、試験は３５℃で行い、
２４時間後、ブランク比較サンプルとの生菌数（Ｃｆｕ
／検体）の減菌率９９％以下で評価し、それぞれのサン
プル３検体がいずれも減菌率９９％以下の場合のみ抗菌
性有りとした。[Evaluation method of antibacterial property] The antibacterial activity test method I (1998 version) proposed by the Antibacterial Product Technology Council was implemented by changing the film adhesion method to glass (no film, the amount of bacteria dropped 0.1 mL). Change). A sample without spraying each liquid was used as a sample for blank comparison. Test bacteria use Staphylococcus aureus and Escherichia coli, nutrients are 1 / 500NB growth condition, test is performed at 35 ° C,
After 24 hours, the viable cell count (Cfu) with the blank comparison sample
/ Sample) was evaluated as having an antibacterial activity only when all three samples had a sterilization rate of 99% or less.
【００３０】実施例１，２ 板ガラスの実製造ライン（フロート法）において、ソー
ダライムガラスの温度が２５０℃の位置にスプレーノズ
ルをセットし、銀コロイドの水分散液（濃度０．１重量
％、平均粒径０．０８ミクロン）を、ガラスが割れない
条件で、５０ｇ／ｍ2（実施例１）又は８０ｇ／ｍ2（実
施例２）のスプレー量で板ガラス表面にスプレーしてサ
ンプルを得た。Examples 1 and 2 In an actual sheet glass production line (float method), a spray nozzle was set at a position where the temperature of soda lime glass was 250 ° C., and an aqueous dispersion of silver colloid (concentration: 0.1% by weight, An average particle size of 0.08 μm) was sprayed onto the surface of the glass sheet at a spray amount of 50 g / m 2 (Example 1) or 80 g / m 2 (Example 2) under the condition that the glass was not broken. .
【００３１】このときの連続ガラスの移動速度は約５ｍ
／分であり、瞬時に抗菌ガラスが得られた。At this time, the moving speed of the continuous glass is about 5 m.
/ Min, and an antibacterial glass was obtained instantaneously.
【００３２】各サンプルのガラス表面に付着している黄
色銀粒子をふき取った結果、通常のガラスと同様に透明
であり、スプレーによる着色も認められなかった。As a result of wiping off the yellow silver particles adhering to the glass surface of each sample, the sample was transparent like ordinary glass, and no coloration by spraying was observed.
【００３３】各サンプルについて、抗菌性の評価を行っ
て結果を表１に示した。The antibacterial properties of each sample were evaluated, and the results are shown in Table 1.
【００３４】また、同様のサンプルを、常温で２４時間
水に漬けた後と、抗菌ガラス表面にキセノン光（５０Ｗ
／ｍ2）を１６時間照射した後についても、それぞれ同
様に抗菌性の評価を行って結果を表１に示した。A similar sample was soaked in water at room temperature for 24 hours, and the surface of the antibacterial glass was irradiated with xenon light (50 W).
/ M 2 ) for 16 hours, the antibacterial properties were similarly evaluated, and the results are shown in Table 1.
【００３５】なお、実施例１，２の各サンプルについ
て、銀イオンのガラス表面からの拡散深さをＸ線マイク
ロアナライザーで分析した結果、約０．５〜約１ミクロ
ンであった。The diffusion depth of silver ions from the glass surface of each of the samples of Examples 1 and 2 was analyzed by an X-ray microanalyzer, and as a result, it was about 0.5 to about 1 micron.
【００３６】実施例３，４ 実施例１，２において、銀コロイドの水分散液のスプレ
ーを、ソーダライムガラスの温度が１５０℃の位置にス
プレーノズルをセットして行ったこと以外は同様にして
抗菌ガラスを製造した。本実施例においても、瞬時に抗
菌ガラスを得ることができた。また、ガラス表面に付着
する黄色銀粒子をふき取った結果、通常のガラスと同様
に透明であり、スプレーによる着色も認められなかっ
た。Examples 3 and 4 The same procedure as in Examples 1 and 2 was carried out except that the aqueous dispersion of silver colloid was sprayed by setting a spray nozzle at a position where the temperature of the soda-lime glass was 150 ° C. Antibacterial glass was manufactured. Also in this example, antibacterial glass could be obtained instantaneously. Further, as a result of wiping off the yellow silver particles adhering to the glass surface, the glass was transparent as in the case of ordinary glass, and coloring by spraying was not recognized.
【００３７】各サンプルについて抗菌性の評価を行って
結果を表１に示した。The antibacterial properties of each sample were evaluated, and the results are shown in Table 1.
【００３８】比較例１ 実施例２において、銀コロイドの水分散液のスプレー
を、ソーダライムガラスの温度が９０℃の位置にスプレ
ーノズルをセットして行ったこと以外は同様にしてスプ
レーを行い、付着したガラス表面の粒子を取り除いてサ
ンプルとし、抗菌性の評価を行って、結果を表１に示し
た。COMPARATIVE EXAMPLE 1 The same procedure as in Example 2 was carried out except that the aqueous dispersion of the silver colloid was sprayed by setting a spray nozzle at a position where the temperature of the soda-lime glass was 90 ° C. Samples were obtained by removing the particles on the glass surface that had adhered, and the samples were evaluated for antibacterial properties. The results are shown in Table 1.
【００３９】実施例５ ガラス表面に公知なディピング法でシリカ−チタニア膜
を塗布し、５００℃で加熱することにより膜厚２０ｎｍ
のコーティング膜付ガラスを得た。このガラスを石鹸水
で良く洗浄し、コーティング面を上にして炉の中に入
れ、ガラスが３００℃になったところで取り出し、実施
例１で用いたものと同様の銀コロイドの分散液を８０ｇ
／ｍ2コーティング膜上に吹き付けた。その後表面の銀
粒子をふき取ってサンプルとし、抗菌性の評価を行っ
て、結果を表１に示した。Example 5 A silica-titania film was coated on a glass surface by a known dipping method and heated at 500 ° C. to form a film having a thickness of 20 nm.
Was obtained. The glass was thoroughly washed with soapy water, placed in a furnace with the coated side up, taken out when the glass reached 300 ° C., and 80 g of a dispersion of the same silver colloid as used in Example 1 was obtained.
/ M 2 sprayed onto the coating film. Thereafter, the silver particles on the surface were wiped off to obtain a sample, which was evaluated for antibacterial properties. The results are shown in Table 1.
【００４０】[0040]
【表１】 [Table 1]
【００４１】表１より、本発明によれば、簡便な処理操
作で抗菌性に優れた抗菌ガラスを製造することができる
ことがわかる。Table 1 shows that according to the present invention, an antibacterial glass having excellent antibacterial properties can be produced by a simple processing operation.
【００４２】[0042]
【発明の効果】以上詳述した通り、本発明の抗菌ガラス
の製造方法によれば、 熱したガラスに銀を含む液又は粉体を接触させるの
みで、比較的低温で、簡便な操作で瞬時にガラスを抗菌
化できる。 ガラスの製造ラインに組み込んで抗菌化を行うこと
も可能で、特別な設備や操作が不要である。 ガラスの表面近傍のサブミクロン〜ミクロンオーダ
ーの深さに銀イオンを拡散させるのみで、無駄になる銀
イオン量が少ない。 といった効果が奏され、抗菌ガラスを安価に、容易かつ
効率的に製造することができる。As described above in detail, according to the method for producing an antibacterial glass of the present invention, only the liquid or powder containing silver is brought into contact with the heated glass, and the instantaneous operation is performed at a relatively low temperature with a simple operation. Glass can be made antibacterial. It can be incorporated into a glass production line for antimicrobial treatment, and requires no special equipment or operation. Only the silver ions are diffused to a depth on the order of submicron to micron near the surface of the glass, and the amount of wasted silver ions is small. Thus, the antibacterial glass can be easily and efficiently manufactured at low cost.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒井 靖志 大阪府大阪市中央区道修町３丁目５番11号 日本板硝子株式会社内 (72)発明者 東 洋三 大阪府大阪市中央区道修町３丁目５番11号 日本板硝子株式会社内 Ｆターム(参考） 4G059 AA01 AC30 HB05 HB17 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasushi Arai 3-5-1, Doshumachi, Chuo-ku, Osaka-shi, Osaka Inside Nippon Sheet Glass Co., Ltd. No.5-11 Nippon Sheet Glass Co., Ltd. F-term (reference) 4G059 AA01 AC30 HB05 HB17
Claims (6)
ガラスを製造する方法において、加熱されたガラスの表
面に銀を含む液又は粉体を接触させることを特徴とする
抗菌ガラスの製造方法。1. A method for producing an antibacterial glass by diffusing silver ions on the surface of a glass, wherein a liquid or powder containing silver is brought into contact with the surface of the heated glass.
０℃以上で当該ガラスの歪み点以下であることを特徴と
する抗菌ガラスの製造方法。2. The method according to claim 1, wherein the temperature of the glass is 10.
A method for producing an antibacterial glass, wherein the temperature is not lower than 0 ° C. and not higher than the strain point of the glass.
０〜３５０℃であることを特徴とする抗菌ガラスの製造
方法。3. The method according to claim 2, wherein the temperature of the glass is 15 or more.
A method for producing an antibacterial glass, wherein the temperature is 0 to 350 ° C.
て、ガラスを溶融、成形及び徐冷して製品ガラスを製造
するに当り、該徐冷工程のガラスの表面に銀を含む液又
は粉体を接触させることを特徴とする抗菌ガラスの製造
方法。4. The liquid or powder containing silver on the surface of the glass in the slow cooling step according to any one of claims 1 to 3, wherein the glass is melted, formed and slowly cooled to produce a product glass. A method for producing an antibacterial glass, comprising contacting a body.
て、ガラスの加熱加工工程において、ガラスの表面に銀
を含む液又は粉体を接触させることを特徴とする抗菌ガ
ラスの製造方法。5. The method for producing an antibacterial glass according to claim 1, wherein a liquid or powder containing silver is brought into contact with the surface of the glass in the step of heating the glass.
て、銀イオンの拡散深さが、ガラス表面から０．０５〜
１０ミクロンの範囲であることを特徴とする抗菌ガラス
の製造方法。6. The method according to claim 1, wherein the diffusion depth of the silver ion is 0.05 to 0.05 from the glass surface.
A method for producing an antimicrobial glass having a size in the range of 10 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11199567A JP2001026466A (en) | 1999-07-13 | 1999-07-13 | Manufacture of antibacterial glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11199567A JP2001026466A (en) | 1999-07-13 | 1999-07-13 | Manufacture of antibacterial glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001026466A true JP2001026466A (en) | 2001-01-30 |
Family
ID=16409987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11199567A Pending JP2001026466A (en) | 1999-07-13 | 1999-07-13 | Manufacture of antibacterial glass |
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| Country | Link |
|---|---|
| JP (1) | JP2001026466A (en) |
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