JPH06343690A - Manufacture of anti-bacterial rubber - Google Patents

Manufacture of anti-bacterial rubber

Info

Publication number
JPH06343690A
JPH06343690A JP5160000A JP16000093A JPH06343690A JP H06343690 A JPH06343690 A JP H06343690A JP 5160000 A JP5160000 A JP 5160000A JP 16000093 A JP16000093 A JP 16000093A JP H06343690 A JPH06343690 A JP H06343690A
Authority
JP
Japan
Prior art keywords
rubber
solution
silver
antibacterial
catheter
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
Application number
JP5160000A
Other languages
Japanese (ja)
Inventor
Yasuo Kuroda
泰男 黒田
Hiroyoshi Soto
裕義 埜渡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Kayaku Co Ltd
Original Assignee
Nippon Kayaku Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Kayaku Co Ltd filed Critical Nippon Kayaku Co Ltd
Priority to JP5160000A priority Critical patent/JPH06343690A/en
Publication of JPH06343690A publication Critical patent/JPH06343690A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide a method to impart anti-bacterial property to a rubber for use as different types of medical material by forming a metallic silver film having a uniform and flat surface on the rubber strongly and stably by the chemical plating method without impairing the softness of the rubber. CONSTITUTION:A surface washing process is applied to a rubber material by the use of a solution with reducing agent, followed by treatment with glyoxal and then a treatment with ammoniac silver nitrate solution, and further a treatment is made if necessary with an aqueous solution of a metal chloride, and thereby an anti-bacterial rubber covered with silver lining is manufactured.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、銀被覆による抗菌性ゴ
ムの製造方法に関する。
FIELD OF THE INVENTION The present invention relates to a method for producing an antibacterial rubber by silver coating.

【0002】[0002]

【従来の技術】アンモニア性硝酸銀溶液とグリオキサー
ルを作用させて、ゴム表面を銀で被覆する方法は、特開
平2−200269号公報に記載の通り、既に公知であ
る。
2. Description of the Related Art A method of reacting an ammoniacal silver nitrate solution and glyoxal to coat the rubber surface with silver is already known, as described in JP-A-2-200269.

【0003】しかしながら、従来の方法では銀被膜で被
覆されない部分が一部できる場合や、被覆された銀の一
部が黒色を呈する場合があり、銀被膜で被覆されない部
分や黒色化した銀被膜は、抗菌効果を示さないため、抗
菌性ゴムとしては実用上問題がある。また、銀被膜の不
均一性は、傷つき易い粘膜組織などに長時間接触する必
要のある尿路カテーテルなどとして用いる場合には、粘
膜組織を傷つける恐れがある他、粘膜組織等に接触しな
い微小部分が生じ、希望する抗菌効果が得られないなど
の恐れがある。
However, in the conventional method, there are cases where a part not covered with the silver film is formed, or a part of the silver covered is black, and the part not covered with the silver film and the blackened silver film are not formed. However, since it does not show an antibacterial effect, it is practically problematic as an antibacterial rubber. In addition, the nonuniformity of the silver coating may damage the mucosal tissue when used as a urinary tract catheter that requires long-term contact with vulnerable mucosal tissue, etc. May occur and the desired antibacterial effect may not be obtained.

【0004】また、従来の方法により被覆処理を行った
場合には、銀被膜表面が曇色を呈し易く、いわゆる金属
光沢を示す平滑面を形成しない場合がある。上記のよう
に尿路カテーテルなどの用途に用いられる場合には、粘
膜障害が起こりにくいように、できるだけ平滑な銀表面
の形成が必要と考えられており、その点でも従来の方法
には問題がある。
Further, when the coating treatment is carried out by the conventional method, the surface of the silver coating is likely to have a cloudy color, and a smooth surface showing a so-called metallic luster may not be formed. When used for applications such as urinary tract catheters as described above, it is considered necessary to form a silver surface as smooth as possible so that mucosal damage is unlikely to occur, and in that respect also the conventional method has a problem. is there.

【0005】[0005]

【発明が解決しようとする課題】上記のようにゴムの表
面に抗菌性を付与するためには、表面全体を黒色化して
いない清浄な銀被膜によって均一に被覆する必要があ
る。この為には、従来の方法では被覆銀量を多くして全
体の被覆を行うか、あるいは銀被覆処理を数回繰り返し
て行う必要があった。しかしながら、被覆銀量を多くす
ると銀被膜が厚くなり、ゴムの変形時や他のものとの接
触時に、銀被膜が欠け落ち易くなるという欠点が生じ
る。特に尿路カテーテルとして使用する場合には、これ
は致命的な欠点となる恐れがある。また、処理を繰り返
して行う事は、工業生産上実際的な方法ではない。
As described above, in order to impart antibacterial properties to the surface of rubber, it is necessary to uniformly coat the entire surface with a clean silver coating which is not blackened. For this purpose, in the conventional method, it was necessary to increase the amount of coated silver to perform the entire coating, or to repeat the silver coating treatment several times. However, if the amount of coated silver is increased, the silver coating becomes thicker, and the silver coating is liable to chip off when the rubber is deformed or comes into contact with another object. This can be a fatal drawback, especially when used as a urinary catheter. Further, repeating the treatment is not a practical method in industrial production.

【0006】また、平滑な銀被覆表面を製造する為の簡
便で実際的な方法に付いては、従来知られていなかっ
た。この為、ゴムを、均一で黒色部分を含まず且つ平滑
な表面を有する銀被膜で被覆し抗菌性を付与する簡便な
方法の開発が待ち望まれていた。
Further, a simple and practical method for producing a smooth silver-coated surface has not heretofore been known. Therefore, it has been desired to develop a simple method for coating rubber with a silver coating that is uniform and does not include a black portion and has a smooth surface to impart antibacterial properties.

【0007】[0007]

【課題を解決するための手段】本発明者らは鋭意検討の
結果、ゴムに還元剤溶液を用いて表面洗浄処理を行った
後に、グリオキサールで処理し、次いでアンモニア性硝
酸銀溶液で処理してゴム表面を銀で被覆することによ
り、均一で黒色部分を含まない銀被膜で被覆された抗菌
性ゴムを製造できることを見いだした。
Means for Solving the Problems As a result of intensive investigations by the present inventors, the rubber was treated with glyoxal and then with an ammoniacal silver nitrate solution after surface-cleaning the rubber with a reducing agent solution. It has been found that by coating the surface with silver, an antibacterial rubber coated with a silver coating that is uniform and does not contain black portions can be produced.

【0008】更に本発明者らは、ゴム表面を銀で被覆し
た後、金属の塩化物水溶液で処理することにより、より
優れた金属光沢を持った銀被膜で被覆された抗菌性ゴム
が製造できることを見いだした。
Furthermore, the present inventors can produce an antibacterial rubber coated with a silver coating having a more excellent metallic luster by coating the surface of the rubber with silver and then treating it with an aqueous solution of a metal chloride. I found it.

【0009】本発明は以上の知見を基に完成されたもの
である。即ち本発明は、 (1)ゴムに還元剤溶液を用いて表面洗浄処理を行った
後に、グリオキサールで処理し、次いでアンモニア性硝
酸銀溶液で処理してゴム表面を銀で被覆することを特徴
とする抗菌性ゴムの製造方法、
The present invention has been completed based on the above findings. That is, the present invention is characterized in that (1) a rubber is subjected to a surface cleaning treatment using a reducing agent solution, then treated with glyoxal, and then treated with an ammoniacal silver nitrate solution to coat the rubber surface with silver. Antibacterial rubber manufacturing method,

【0010】(2)ゴム表面を銀で被覆した後、金属の
塩化物水溶液で処理する請求項1記載の抗菌性ゴムの製
造方法、に関するものである。
(2) A method for producing an antibacterial rubber according to claim 1, wherein the rubber surface is coated with silver and then treated with a metal chloride aqueous solution.

【0011】本発明の方法によれば、天然ゴムのほかク
ロロプレンゴム、ニトリルブタジエンゴム、ブチルゴ
ム、アクリルゴム、シリコンゴムなども同様に処理を行
う事ができる。
According to the method of the present invention, not only natural rubber but also chloroprene rubber, nitrile butadiene rubber, butyl rubber, acrylic rubber, silicone rubber and the like can be treated in the same manner.

【0012】また、本発明の方法によれば、ゴムを、均
一で黒色部分を含まず、且つ金属光沢を持った平滑な表
面を呈する銀被膜で被覆する事ができる。銀被覆を行う
ゴムは、その形状を問わず、板、紐、チューブ状ゴム等
全てのゴム製品の銀被覆を行う事ができる。また、本発
明の方法による銀被膜層はゴムに充分強固に結合してい
るので、折り曲げなどの変形や軽度の摩擦に対し、充分
な耐久性を有する。
Further, according to the method of the present invention, it is possible to coat the rubber with a silver coating which is uniform and does not contain a black portion and which has a smooth surface having a metallic luster. Regardless of the shape of the rubber coated with silver, all rubber products such as plates, strings, and tube-shaped rubber can be coated with silver. Further, since the silver coating layer according to the method of the present invention is sufficiently firmly bonded to rubber, it has sufficient durability against deformation such as bending and slight friction.

【0013】これにより、例えば尿路カテーテルとして
使用しても銀被膜が剥離する事はなく、充分使用に耐え
るものである。尿路カテーテルの使用に当たって、しば
しば「上行性感染」が発生するという問題があり、抗菌
効果を有するカテーテルの開発が待ち望まれていた。ま
た、尿路カテーテル表面に細菌が付着して形成するいわ
ゆるバイオフィルムは、尿路結石がカテーテル表面に付
着する原因の一つとして考えられているが、カテーテル
表面に付着した結石は、尿路カテーテル脱着時に尿路粘
膜を傷つける恐れが高く、この理由からも抗菌効果を有
するカテーテルの開発が待ち望まれていた。本発明の方
法によれば、尿路カテーテル外表面のみならず、内管表
面も銀で被覆することができるので、蓄尿バックからの
細菌の遡行を防ぐ事もできる。なお、尿路用フォーリー
カテーテルは、一般に全長が42cm程度であるが、こ
の全部を銀で被覆する必要はなく、男子の長い尿路を考
慮しても、カテーテルの排尿口から20〜25cmを銀
で被覆すれば、微生物による感染を防ぐ事ができる。
As a result, even when used as a urinary tract catheter, the silver coating is not peeled off, and it is sufficiently durable for use. When using a urinary tract catheter, there is a problem that "ascending infection" often occurs, and development of a catheter having an antibacterial effect has been long awaited. A so-called biofilm formed by bacteria adhering to the urinary tract catheter surface is considered as one of the causes of urinary tract stones adhering to the catheter surface. There is a high risk of damaging the urinary tract mucosa during desorption, and for this reason also the development of a catheter having an antibacterial effect has been long awaited. According to the method of the present invention, not only the outer surface of the urinary tract catheter but also the surface of the inner tube can be coated with silver, so that the retrograde of bacteria from the urine storage bag can be prevented. The total length of the urinary tract Foley catheter is generally about 42 cm, but it is not necessary to cover the entire length with silver. By coating with, it is possible to prevent infection by microorganisms.

【0014】本発明の方法で製造した抗菌性ゴムは、上
記のような特性を有しているので、尿路カテーテルなど
医療器具としての用途の他にも、食品製造工程で使用さ
れるゴムチューブや、水道蛇口の先に取り付けるゴムホ
ースなど各種の用途で使用可能である。
Since the antibacterial rubber produced by the method of the present invention has the above-mentioned characteristics, it can be used as a medical instrument such as a urinary tract catheter as well as a rubber tube used in a food production process. It can also be used for various purposes such as a rubber hose attached to the end of a water faucet.

【0015】以下、本発明について詳細に説明する。ゴ
ムとしては、天然ゴム、クロロプレンゴム、ニトリルブ
タジエンゴム、ブチルゴム、アクリルゴム、シリコンゴ
ム等各種のゴムが使用できる。ゴムは、アセトンなどの
有機溶剤などにより脱脂した後に還元剤溶液を用いて表
面洗浄処理するのが好ましい。この際使用する還元剤と
しては、ヒドラジン、ホルマリン(アルカリ水溶液)な
どが使用できるが、ヒドラジンが好ましい。残留物の除
去などの点から、ヒドラジンはヒドラジンヒドラート水
溶液の形で使用するのが好ましい。還元剤溶液としては
還元剤の水溶液が好ましい。
The present invention will be described in detail below. As the rubber, various kinds of rubber such as natural rubber, chloroprene rubber, nitrile butadiene rubber, butyl rubber, acrylic rubber and silicone rubber can be used. The rubber is preferably degreased with an organic solvent such as acetone and then subjected to a surface cleaning treatment with a reducing agent solution. As the reducing agent used at this time, hydrazine, formalin (alkaline aqueous solution) and the like can be used, but hydrazine is preferable. It is preferable to use hydrazine in the form of an aqueous solution of hydrazine hydrate from the viewpoint of removing the residue. The reducing agent solution is preferably an aqueous solution of a reducing agent.

【0016】還元剤溶液の濃度、還元剤溶液による処理
温度、処理時間などは、使用するゴムの種類、還元剤の
種類によってそれぞれ異なるが、通常0.5〜5重量%
の濃度の還元剤溶液を使用し、好ましくは処理温度0〜
35℃で1〜30分間特に好ましくは5〜15分間、処
理を行うゴムを還元剤溶液中浸漬して、反応させる。使
用する還元剤溶液の量は、特に限定されないが、ゴムの
処理面が溶液を入れた容器壁、あるいは他のゴムと接触
しないように浸漬する必要があり、処理を行うゴム表面
が、そのような状態で充分溶液に浸るに足りる液量が必
要である。還元剤溶液による処理が終了したら、ゴムを
溶液から引き上げ充分に水洗を行ってから乾燥する。
The concentration of the reducing agent solution, the treating temperature with the reducing agent solution, the treating time, etc. differ depending on the type of rubber used and the type of reducing agent, but are usually 0.5 to 5% by weight.
A reducing agent solution having a concentration of
The rubber to be treated is immersed in the reducing agent solution at 35 ° C. for 1 to 30 minutes, particularly preferably 5 to 15 minutes, to react. The amount of the reducing agent solution used is not particularly limited, but it is necessary to immerse the rubber so that the treated surface of the rubber does not come into contact with the container wall containing the solution or other rubber, and the rubber surface to be treated is A sufficient amount of liquid is required to fully immerse the solution in this state. When the treatment with the reducing agent solution is completed, the rubber is pulled out of the solution, thoroughly washed with water, and then dried.

【0017】次にグリオキサールを処理を行うゴムの表
面に付着させる。付着は各種の方法によって行う事が出
来、例えばグリオキサールの溶液(例えばアセトン溶
液)をゴムの表面に塗布してもよいが、簡便にはゴムを
グリオキサールのアセトン溶液に浸漬した後、引き上げ
乾燥すれば良い。この際使用するグリオキサール溶液の
濃度は、5〜40重量%が好ましく、特に好ましくは1
5〜30重量%である。
Next, glyoxal is attached to the surface of the rubber to be treated. The adhesion can be carried out by various methods. For example, a solution of glyoxal (for example, acetone solution) may be applied to the surface of the rubber, but simply by immersing the rubber in the acetone solution of glyoxal and then pulling and drying it. good. The concentration of the glyoxal solution used at this time is preferably 5 to 40% by weight, particularly preferably 1
It is 5 to 30% by weight.

【0018】次にアンモニア性硝酸銀溶液との反応によ
り銀被膜形成を行うが、アンモニア性硝酸銀溶液は、硝
酸銀とアンモニア水から、公知の方法により調製する事
が出来る。即ち硝酸銀の水溶液にアンモニア水を徐々に
加え、初めに生成する沈澱物がちょうど溶解するところ
で、アンモニア水の添加を終了することにより調製する
ことができる。アンモニア性硝酸銀溶液の濃度は、目的
とする銀被膜の厚さ等により異なるが、硝酸銀の濃度と
して一般的には0.1〜5重量%が好ましく、特に好ま
しくは1〜3重量%である。
Next, a silver film is formed by a reaction with an ammoniacal silver nitrate solution. The ammoniacal silver nitrate solution can be prepared from silver nitrate and aqueous ammonia by a known method. That is, it can be prepared by gradually adding aqueous ammonia to an aqueous solution of silver nitrate and terminating the addition of aqueous ammonia at the point where the initially formed precipitate is just dissolved. Although the concentration of the ammoniacal silver nitrate solution varies depending on the intended thickness of the silver coating, etc., the concentration of silver nitrate is generally preferably 0.1 to 5% by weight, and particularly preferably 1 to 3% by weight.

【0019】この様にして調製したアンモニア性硝酸銀
溶液を容器に入れ、上記の様にグリオキサールで処理し
たゴムの銀被覆を行う面を、アンモニア性硝酸銀溶液に
浸す。この時には、溶液が揺れ動かないようにできるだ
け緩やかに浸す方が好ましい。
The ammoniacal silver nitrate solution thus prepared is placed in a container, and the surface of the rubber treated with glyoxal as described above on which silver is coated is dipped in the ammoniacal silver nitrate solution. At this time, it is preferable to immerse the solution as gently as possible so that the solution does not shake.

【0020】アンモニア性硝酸銀溶液の温度は、好まし
くは35℃以下、特に好ましくは0〜15℃である。浸
漬する時間は、希望する銀被膜の厚さや処理温度にもよ
るが、処理面が溶液に浸ってから5分間程度で充分であ
る。処理が終了したら、ゴムを溶液から引き上げ、アン
モニア性硝酸銀溶液の残液が無くなるまで、水でゴムを
洗浄する。
The temperature of the ammoniacal silver nitrate solution is preferably 35 ° C. or lower, particularly preferably 0 to 15 ° C. The immersion time depends on the desired thickness of the silver coating and the processing temperature, but about 5 minutes after the processed surface is immersed in the solution is sufficient. When the treatment is complete, the rubber is pulled out of the solution and washed with water until there is no residual ammoniacal silver nitrate solution.

【0021】その後ゴムを必要により金属の塩化物水溶
液に浸して処理(洗浄)し、金属光沢を有する平滑な銀
被膜を形成させる。金属の塩化物としては、塩化ナトリ
ウム、塩化カリウム、塩化マグネシウム、塩化カルシウ
ム、塩化リチウム等何れも使用可能であるが、市販の化
合物の純度、価格などから考えて塩化ナトリウム(食
塩)の使用が好ましい。
After that, the rubber is treated (washed) by immersing the rubber in an aqueous solution of metal chloride to form a smooth silver coating having a metallic luster. As the metal chloride, any of sodium chloride, potassium chloride, magnesium chloride, calcium chloride, lithium chloride and the like can be used, but it is preferable to use sodium chloride (salt) considering the purity and price of the commercially available compound. .

【0022】使用する金属の塩化物水溶液濃度は、浸漬
時間、温度により異なるが、通常は5〜15%が好まし
い。また浸漬時間は室温で5秒〜1分間程度で充分であ
るが、金属光沢の状況を視認する事により調整する方が
好ましい。
The concentration of the aqueous chloride solution of the metal used varies depending on the immersion time and temperature, but is usually preferably 5 to 15%. Further, the immersion time is sufficient for about 5 seconds to 1 minute at room temperature, but it is preferable to adjust it by visually observing the state of metallic luster.

【0023】その後、金属の塩化物水溶液からゴムを引
き上げて、充分に水で洗浄し、乾燥して、金属光沢を有
する平滑な銀被膜で被覆された抗菌性ゴムを得る。本発
明により製造される抗菌性ゴムの各種細菌に対する抗菌
効果は、寒天培地を用いるハローテスト法、あるいは細
菌の懸濁液をフラスコに入れ、抗菌性ゴムを加えて振盪
するシェークフラスコ法等によって確認する事ができ
る。
Then, the rubber is pulled out from the aqueous metal chloride solution, thoroughly washed with water, and dried to obtain an antibacterial rubber coated with a smooth silver film having metallic luster. The antibacterial effect of the antibacterial rubber produced by the present invention against various bacteria is confirmed by a halo test method using an agar medium, or a shake flask method in which a suspension of bacteria is put in a flask and the antibacterial rubber is added and shaken. You can do it.

【0024】本発明の方法により製造される抗菌性ゴム
は、銀被膜により被覆されているので、例えば尿路留置
カテーテル等として用いる場合で、X線透視を行う時に
も、特に造影剤の必要がない。
Since the antibacterial rubber produced by the method of the present invention is coated with a silver coating, it is necessary to use a contrast agent especially when performing fluoroscopy when using it as a catheter for indwelling urinary tract. Absent.

【0025】また、本発明の方法により製造された抗菌
性ゴムは、表面被膜により電導性を有しているので、柔
軟性、変形性、弾性等の特性を有する電極としても、使
用可能である。
Since the antibacterial rubber produced by the method of the present invention has electric conductivity due to the surface coating, it can be used as an electrode having characteristics such as flexibility, deformability and elasticity. .

【0026】[0026]

【実施例】次に実施例を示して、本発明を更に具体的に
説明するが、本発明はこれらの実施例のみに限定される
ものではない。
EXAMPLES The present invention will now be described more specifically by showing examples, but the present invention is not limited to these examples.

【0027】実施例1 縦横各10cm、厚さ2mmの天然ゴム板の銀被覆処理
を行なおうとする面を、アセトンで洗浄して脱脂後、乾
燥した。このゴム板をナイロン糸で吊るして、1重量%
ヒドラジンヒドラート水溶液に10分間浸して還元洗浄
(表面洗浄処理)を行う。溶液からゴム板を引き上げ、
水洗して、ヒドラジンヒドラート水溶液を洗い落とした
後、乾燥させる。
Example 1 A surface of a natural rubber plate having a length and width of 10 cm and a thickness of 2 mm to be subjected to silver coating was washed with acetone, degreased and dried. Hang this rubber plate with nylon thread and
It is immersed in an aqueous solution of hydrazine hydrate for 10 minutes to carry out reduction cleaning (surface cleaning treatment). Pull the rubber plate out of the solution,
It is washed with water, the aqueous hydrazine hydrate solution is washed off, and then dried.

【0028】40%グリオキサール水溶液500gとア
セトン500gを混合し、溶解させる。この溶液に還元
洗浄を行ったゴム板を浸し、引き上げて通風により乾燥
する。
500 g of a 40% aqueous glyoxal solution and 500 g of acetone are mixed and dissolved. A rubber plate that has been subjected to reduction cleaning is dipped in this solution, pulled up, and dried by ventilation.

【0029】1%硝酸銀水溶液に2%アンモニア水を撹
拌しながら滴下して、初めに生成した沈澱が溶解した所
で、アンモニア水の滴下を止め、アンモニア性硝酸銀溶
液を調製する。この様にして調製したアンモニア性硝酸
銀溶液を容器に入れ、液温を5℃に保つ。上記によりグ
リオキサール処理を行ったゴム板の銀被覆が必要な面
を、この溶液に浸す。このとき銀被覆が必要な面が、容
器壁に触れないように緩やかに行い、そのまま3分間保
った後、溶液から引き上げ、アンモニア性硝酸銀溶液の
残留がなくなるまで、充分に水洗する。
2% ammonia water was added dropwise to a 1% silver nitrate aqueous solution with stirring, and when the initially formed precipitate was dissolved, the addition of ammonia water was stopped to prepare an ammoniacal silver nitrate solution. The ammoniacal silver nitrate solution thus prepared is placed in a container and the liquid temperature is kept at 5 ° C. The surface of the rubber plate which has been subjected to the glyoxal treatment as described above and which requires silver coating is immersed in this solution. At this time, the surface where silver coating is required is performed gently so as not to touch the wall of the container, and after being kept as it is for 3 minutes, it is taken out of the solution and sufficiently washed with water until the ammoniacal silver nitrate solution remains.

【0030】このようにして得られた銀被覆したゴム板
を、10%食塩水に1分間浸した後、引き上げて水洗
し、抗菌性ゴム板を得る。抗菌性ゴム板上に形成された
銀被膜の表面は、黒色部が全く認められず、優れた金属
光沢を有する平滑な銀被膜となっており、ゴムに強固に
密着している。
The silver-coated rubber plate thus obtained is immersed in a 10% saline solution for 1 minute, then pulled up and washed with water to obtain an antibacterial rubber plate. The surface of the silver coating formed on the antibacterial rubber plate is a smooth silver coating having no black portion and excellent metallic luster, and firmly adheres to the rubber.

【0031】実施例2 外径約6mmの天然ゴム製フォーリーカテーテルを、ア
セトンで洗浄して脱脂後、乾燥した。このカテーテルを
吊るして、先端から約30cmまでの部分を、1重量%
ヒドラジンヒドラート水溶液に10分間浸して還元洗浄
を行う。溶液からカテーテルを引き上げ、水洗して、ヒ
ドラジンヒドラート水溶液を洗い落とした後、乾燥させ
る。
Example 2 A natural rubber Foley catheter having an outer diameter of about 6 mm was washed with acetone, degreased, and dried. Suspend this catheter, 1% by weight from the tip to about 30 cm
It is immersed in an aqueous solution of hydrazine hydrate for 10 minutes for reduction cleaning. The catheter is pulled up from the solution, washed with water, the aqueous hydrazine hydrate solution is washed off, and then dried.

【0032】40%グリオキサール水溶液500gとア
セトン300gを混合し、溶解させる。この溶液に還元
洗浄を行ったカテーテルを浸し、引き上げて通風により
乾燥する。
500 g of 40% glyoxal aqueous solution and 300 g of acetone are mixed and dissolved. A catheter that has been subjected to reduction cleaning is dipped in this solution, pulled up, and dried by ventilation.

【0033】5%硝酸銀水溶液200gに、5%アンモ
ニア水を撹拌しながら滴下して、初めに生成した沈澱が
溶解した所で、アンモニア水の滴下を止め、最後に水を
加え全量を500gとして、アンモニア性硝酸銀溶液を
調製する。この様にして調製したアンモニア性硝酸銀溶
液を円筒形容器に入れ、液温を3℃に保つ。上記により
グリオキサール処理を行ったカテーテルを先端から25
cmまで、この溶液に浸す。このときカテーテルが、容
器壁に触れないように緩やかに行い、そのまま2分間保
った後、溶液から引き上げ、アンモニア性硝酸銀溶液の
残留がなくなるまで、充分に水洗する。
To 200 g of a 5% silver nitrate aqueous solution, 5% ammonia water was added dropwise with stirring, and when the precipitate formed first dissolved, the ammonia water addition was stopped, and finally water was added to bring the total amount to 500 g. Prepare an ammoniacal silver nitrate solution. The ammoniacal silver nitrate solution thus prepared is placed in a cylindrical container, and the liquid temperature is kept at 3 ° C. Insert the glyoxal-treated catheter from the tip 25
Immerse in this solution up to cm. At this time, the catheter is gently moved so as not to touch the container wall, kept for 2 minutes as it is, taken out of the solution, and thoroughly washed with water until the ammoniacal silver nitrate solution remains.

【0034】このようにして得られた銀被覆したカテー
テルを、10%食塩水に1分間浸した後、引き上げて水
洗し、抗菌性カテーテルを得る。抗菌性カテーテル上に
形成された銀被膜の表面は、黒色部が全く認められず、
優れた金属光沢を有する平滑な銀被膜となっており、ゴ
ムに強固に密着している。また、抗菌性カテーテル内管
の表面にも、外側表面と同様に銀被膜が形成されてい
る。
The thus obtained silver-coated catheter was immersed in 10% saline for 1 minute, then pulled up and washed with water to obtain an antibacterial catheter. The surface of the silver coating formed on the antibacterial catheter has no black part at all,
It has a smooth silver coating with excellent metallic luster and firmly adheres to rubber. Further, a silver coating is formed on the surface of the inner tube of the antibacterial catheter, like the outer surface.

【0035】試験例 次に、本発明の方法で製造された抗菌性ゴムの抗菌効果
について、試験例を示して説明する。
Test Example Next, the antibacterial effect of the antibacterial rubber produced by the method of the present invention will be described with reference to test examples.

【0036】試験例1〜2 ハローテスト法による抗菌
効果試験 実施例1〜2で製造した抗菌性ゴム板および抗菌性カテ
ーテルの一部(試験片)を、通常の寒天培地の中心に、
抗菌性ゴムの半分が埋まる様に置き、大腸菌(IFO 330
1)懸濁液を均一に塗布した。また銀被膜形成処理を行
っていない同一ゴムのほぼ同量を、対照品として試験片
と同様に、試験に用いた。そのまま35℃の培養器中
で、24時間培養したところ、抗菌性ゴムの銀被膜面周
辺には、ほぼ均一な巾で明確なハローが観察されたが、
対照品ではハローがまったく観察されなかった事から、
抗菌性ゴムには充分な抗菌効果がある事が証明された。
Test Examples 1-2 Antibacterial Effect Test by Hello Test Method A part (test piece) of the antibacterial rubber plate and the antibacterial catheter produced in Examples 1 and 2 was placed in the center of an ordinary agar medium.
Place it so that half of the antibacterial rubber is buried, and then E. coli (IFO 330
1) The suspension was applied uniformly. Further, substantially the same amount of the same rubber that had not been subjected to the silver film formation treatment was used in the test as a control product in the same manner as the test piece. After culturing for 24 hours in a 35 ° C. incubator as it was, a clear halo with a substantially uniform width was observed around the silver-coated surface of the antibacterial rubber.
Since no halo was observed in the control product,
It has been proved that the antibacterial rubber has a sufficient antibacterial effect.

【0037】試験例3〜4 シェークフラスコ法による
抗菌効果試験 上記実施例1〜2で製造した抗菌性ゴムの銀被膜の表面
積が12cm2 になるようにサンプリングし、細かく切
断して試験片として用いた。また銀被膜形成処理を行っ
ていない同一ゴムのほぼ同量を、対照品として試験片と
同様に試験に用いた。ニュートリエントブロースで、3
0℃、1日間培養した大腸菌(IFO 3301)を、リン酸緩
衝液で150倍に希釈して、試験菌液を調製した。この
ときの試験菌液中の生菌数は、4〜5×107 個/ml
であった。フラスコに、この試験菌液を75mlと上記
試験片又は対照品を加え、100回/分の速度で、1時
間水平振盪した。振盪前後の生菌数を希釈平板法で求め
て、振盪による生菌数の減少率(減菌率)を算出した。
即ち、減菌率は以下の式によって求めた。 減菌率(%)=100×(振盪前生菌数−振盪後生菌
数)/振盪前生菌数 シェークフラスコ法による試験結果を以下の表1および
表2に示す。
Test Examples 3 to 4 Antibacterial Effect Test by Shake Flask Method Sampling was performed so that the surface area of the silver coating of the antibacterial rubber produced in the above Examples 1 and 2 was 12 cm 2 , and finely cut to be used as a test piece. I was there. In addition, approximately the same amount of the same rubber that had not been subjected to the silver film formation treatment was used in the test as a control product in the same manner as the test piece. 3 with nutrient broth
Escherichia coli (IFO 3301) cultured at 0 ° C. for 1 day was diluted 150-fold with a phosphate buffer to prepare a test bacterial solution. The viable cell count in the test bacterial solution at this time is 4 to 5 × 10 7 cells / ml.
Met. 75 ml of this test bacterial solution and the above test piece or control product were added to a flask and shaken horizontally at a rate of 100 times / minute for 1 hour. The viable cell count before and after shaking was determined by the dilution plate method, and the reduction rate (bacterial reduction rate) of viable cell count due to shaking was calculated.
That is, the sterilization rate was calculated by the following formula. Sterilization rate (%) = 100 × (the number of viable cells before shaking-the number of viable cells after shaking) / the number of viable cells before shaking The test results by the shake flask method are shown in Tables 1 and 2 below.

【0038】[0038]

【表1】 表1 抗菌性ゴム板(実施例1)のシェークフラスコ法による抗菌効果試験 結果 試 料 振盪前生菌数 振盪後生菌数 減菌率 (個/ml) (個/ml) (%) 対照品 4.3×107 4.6×107 − 7 抗菌性ゴム板 4.0×107 7.1×106 82[Table 1] Table 1 Results of antibacterial effect test by shake flask method of antibacterial rubber plate (Example 1) Samples Number of viable bacteria before shaking Number of viable bacteria after shaking Sterilization rate (pieces / ml) (pieces / ml) (% ) control sample 4.3 × 10 7 4.6 × 10 7 - 7 antimicrobial rubber plate 4.0 × 10 7 7.1 × 10 6 82

【0039】[0039]

【表2】 表2 抗菌性カテーテル(実施例2)のシェークフラスコ法による抗菌効果 試験結果 試 料 振盪前生菌数 振盪後生菌数 減菌率 (個/ml) (個/ml) (%) 対照品 4.3×107 4.5×107 − 5 抗菌性カテーテル 4.4×107 7.6×106 83[Table 2] Table 2 Results of antibacterial effect test by shake flask method of antibacterial catheter (Example 2) Samples Viable bacteria before shaking Viable bacteria after shaking Sterilization rate (cells / ml) (cells / ml) (%) Control product 4.3 × 10 7 4.5 × 10 7 −5 Antibacterial catheter 4.4 × 10 7 7.6 × 10 6 83

【0040】上記の表1および表2から明らかなよう
に、本発明の方法で製造した抗菌性ゴムは、優れた抗菌
効果を示す。本試験では振盪時間を1時間としたが、振
盪時間を更に長くした場合には、抗菌効果はいっそう明
らかになった。抗菌性カテーテルを試料として用い、2
4時間振盪を行った場合には、減菌率は99%以上とな
った。
As is clear from Tables 1 and 2 above, the antibacterial rubber produced by the method of the present invention exhibits an excellent antibacterial effect. Although the shaking time was set to 1 hour in this test, the antibacterial effect was further clarified when the shaking time was further increased. Using an antibacterial catheter as a sample, 2
When shaken for 4 hours, the sterilization rate was 99% or higher.

【0041】[0041]

【発明の効果】本発明の方法により、金属光沢を有する
平滑で均一な銀被膜で被覆されたゴムは、優れた抗菌効
果を示し、尿路カテーテル等の医療器具として用いる事
ができるほか、食品製造工程で使用されるゴムチューブ
や、水道蛇口の先に取り付けるゴムホース等各種の用途
で使用可能である。また、銀被膜層はゴムに充分強固に
結合しているので、折り曲げなどの変形や軽度の摩擦に
対し、充分な耐久性を有する。 また、尿路留置カテー
テル等として用いる場合で、X線透視を行う時にも、特
に造影剤の必要がない。さらに、本発明の方法により製
造された、銀被膜により被覆されたゴムは、表面被膜に
より電導性を有しているので、柔軟性、変形性、弾性等
の特性を有する電極としても、使用可能である。
The rubber coated with a smooth and uniform silver film having metallic luster by the method of the present invention exhibits an excellent antibacterial effect and can be used as a medical instrument such as a urinary tract catheter and food It can be used in various applications such as rubber tubes used in the manufacturing process and rubber hoses attached to the ends of taps. Further, since the silver coating layer is firmly bonded to rubber, it has sufficient durability against deformation such as bending and slight friction. Further, when used as a catheter for indwelling the urinary tract or the like, a contrast agent is not particularly required even when performing fluoroscopy. Further, the rubber coated with the silver coating, which is produced by the method of the present invention, has electric conductivity due to the surface coating, and thus can be used as an electrode having characteristics such as flexibility, deformability and elasticity. Is.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ゴムに還元剤溶液を用いて表面洗浄処理
を行った後に、グリオキサールで処理し、次いでアンモ
ニア性硝酸銀溶液で処理してゴム表面を銀で被覆する事
を特徴ことする抗菌性ゴムの製造方法。
1. An antibacterial rubber characterized by subjecting a rubber to a surface cleaning treatment using a reducing agent solution, followed by treatment with glyoxal and then with an ammoniacal silver nitrate solution to coat the rubber surface with silver. Manufacturing method.
【請求項2】 ゴム表面を銀で被覆した後、金属の塩化
物水溶液で処理する請求項1記載の抗菌性ゴムの製造方
法。
2. The method for producing an antibacterial rubber according to claim 1, wherein the surface of the rubber is coated with silver and then treated with a metal chloride aqueous solution.
JP5160000A 1993-06-07 1993-06-07 Manufacture of anti-bacterial rubber Pending JPH06343690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5160000A JPH06343690A (en) 1993-06-07 1993-06-07 Manufacture of anti-bacterial rubber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5160000A JPH06343690A (en) 1993-06-07 1993-06-07 Manufacture of anti-bacterial rubber

Publications (1)

Publication Number Publication Date
JPH06343690A true JPH06343690A (en) 1994-12-20

Family

ID=15705814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5160000A Pending JPH06343690A (en) 1993-06-07 1993-06-07 Manufacture of anti-bacterial rubber

Country Status (1)

Country Link
JP (1) JPH06343690A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010521697A (en) * 2007-01-31 2010-06-24 ノバルティス アーゲー Antibacterial medical device containing silver nanoparticles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010521697A (en) * 2007-01-31 2010-06-24 ノバルティス アーゲー Antibacterial medical device containing silver nanoparticles

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