JP3533601B2 - Method for producing an article having antibacterial properties - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to the production how things that have antimicrobial properties.

Due to the recent increase in awareness of environmental problems, there is a tendency to demand a clean and comfortable living environment even in general households. For example, disinfection for cleaning various products used in toilet bowls, bathrooms or kitchens. There are many effective detergents on the market, and various products have been provided that advertise that they have been subjected to antibacterial treatment.

An antibacterial processed product generally called an antibacterial product is manufactured by binding or dispersing an antibacterial active substance having an antibacterial effect to a mineral or a ceramic. In many cases, the antibacterial agent is kneaded or sprayed with the antibacterial agent.

[0004]

By the way, the antibacterial effect of the antibacterial agent is greatly influenced by the processing conditions of the product used, and the antibacterial performance and action of the antibacterial active substance do not directly become the antibacterial property of the product. In addition, the actual product should not be provided with an antibacterial active substance so as to reduce the durability or the commercial value of the product. The problem becomes very important especially for ornaments or products similar to ornaments. Further, the antibacterial agent is present on the surface of the product and exerts an antibacterial effect. However, if the antibacterial agent has poor adhesion to the product and is peeled off from the material, the product value and the antibacterial effect are reduced, and thus the product is It will reduce the durability of itself and the antibacterial effect.

[0007] Of course, similarly, daily miscellaneous goods used in kitchens such as kitchen knives that come into direct contact with foodstuffs are also provided with an antibacterial active substance, so that the value of appearance is reduced or the durability of the product itself is reduced. There should be no problems.

[0006] The inventors of the present invention is intended is excellent in appearance, is to provide a manufacturing how things that have antimicrobial properties are durable.

[0007]

In order to achieve the above-mentioned object, the method for producing an object having antibacterial properties of the present invention is a metal material other than silver (for example, copper) or a noble metal (for a metal material made of titanium). For example, sputtering is performed by using a metal containing 0.1 to 15% by weight of silver in gold, palladium, or an alloy of a noble metal) as a target to form a metal thin film made of a metal containing silver on the surface of the metal material. Characterize.

Further, in the method for producing an object having antibacterial properties of the present invention, the target is a metal comprising about 80% by weight of gold, about 12% by weight of copper, about 5% by weight of palladium and about 3% by weight of silver. And sputtering is performed to form a metal thin film made of a noble metal containing silver on the surface of the metal material.

[0009]

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below. The inventor, as an antibacterial active substance,
Precious metals other than silver, such as gold, palladium, and their alloys, that contain a small amount of silver exhibit a good antibacterial effect and do not elute organic substances, and are safe for general products. I found that there was this gold, palladium,
And antibacterial active substances containing a small amount of silver with respect to noble metals other than silver such as alloys thereof (hereinafter, silver-gold / antibacterial agent will be described as an example, but other noble metal materials are also the same).
I researched how to add it in a durable state until it was practical as a product.

In particular, as a result of research on spectacles, in order to add the silver-gold / antibacterial agent to frames and temples, which are spectacle parts, it is excellent in appearance as a decorative feature of spectacles and has durability. It was important to have certain antibacterial properties.

Therefore, in order to attach the silver-gold / antibacterial agent to the surface of the metal material of the eyeglass parts as a metal material, PVD can generally perform a very good surface treatment on the metal material. When trying to adopt ion plating, which is one of the methods, the silver-gold / antibacterial agent is in a state of mixing two kinds of metal materials of silver and gold. It turned out that it is impossible to do a ting.

Further, in the method of forming a thin film of the silver-gold / antibacterial agent on a metal material by using a vacuum evaporation method, there is a problem in durability of the formed thin film. Stable attachment of a thin film of silver-gold / antibacterial agent to a metal material maintains durable antibacterial properties.

Therefore, in order to adhere the silver-gold / antibacterial agent to the metal material, a good adhesion result can be obtained by performing a sputtering process which is a kind of PVD method, and the surface condition is also as an ornament. It was in excellent condition with no problems.

Further, as a result of research and examination, the silver-gold
As an antibacterial agent, gold containing 0.1 to 15% by weight of silver was found to have excellent antibacterial properties (this is the same for other precious metals), and as a metal material for parts, It was also found that a titanium material is preferable, and in particular, titanium oxide is excellent in its antibacterial property when a silver-gold antibacterial agent containing 0.1 to 15% by weight of silver on gold and palladium is attached.

Therefore, in the sputtering treatment tank,
Using a metallic material containing 99% by weight of gold and 1% by weight of silver as a target, known sputtering was performed on a titanium oxide material molded into the temple shape of eyeglasses. Then, an antibacterial activity test was conducted on the completed prototype.

The results are shown in FIG. In the figure, “control” means a sample of polyester resin as a comparative example, “specimen 1”
Is a prototype, and the “specimen 3” is a temple shape molded from only titanium oxide. The test was carried out by the Japan Food Research Center by the film adhesion method (Shin-Gikyo 1998 version) with 3 measurement points for the same measurement object.

As can be seen from FIG. 1, in the "specimen 1", that is, in the prototype described in this embodiment, "<1
There was a part of "0", and the good result that Escherichia coli and Staphylococcus aureus were not substantially detected was obtained.

Further, as a prototype, a target of about 8
Using a noble metal consisting of 0% by weight of gold, about 12% by weight of copper, about 5% by weight of palladium and about 3% by weight of silver, the titanium oxide material molded into the temple shape of the eyeglasses as described above is used. Then, a known sputtering product was produced, and a so-called pink gold color was exhibited on the surface, resulting in excellent decorativeness.

When the above-mentioned antibacterial activity test was conducted on the completed prototype, as shown as "Sample 2" in FIG. 1 (however, there are two measurement points), the above "Sample 1" was obtained.
It was possible to obtain the same good result as. Further, when the prototype was compared with the normal 18K, it was found that the surface discoloration was slower than the normal 18K and the film hardness (Hv180) was higher than the normal 18K.

As described above, according to the present embodiment, the surface condition and durability of the ornamental product do not deteriorate the value of the product, and the adhesiveness of the antibacterial active substance is excellent. It is possible to provide a product with excellent durability. Therefore, not only in eyeglass parts, but also in parts such as watch cases and bands, parts for ornaments such as necklaces that are directly worn on the body, and daily sundries such as cutlery and metal tableware. By applying the present invention, it is possible to obtain a remarkable effect as having antibacterial properties.

It should be noted that ordinary daily goods such as tableware do not necessarily have to be in a state of high quality unlike glasses, watches, and ornaments, and therefore consideration is given to having only antibacterial properties. As a result, when a titanium metal material is subjected to a surface treatment in which a metal other than silver (for example, copper) containing 0.1 to 15% by weight of silver is used as a target for sputtering, the product is The antibacterial property was excellent even when compared with a product formed by performing the same surface treatment using another metal having a composition different from that described in the present embodiment as a target.

[0023]

As described above, according to the present invention, the method for producing a product having an excellent appearance such as a pink gold color on the surface and having a durable antibacterial property has the antibacterial property and is practically used. We were able to realize the provision of problem-free glasses, watches, ornaments, daily necessities, etc.

[Brief description of drawings]

FIG. 1 is a diagram showing a test result of antibacterial activity of a prototype according to an embodiment of the present invention.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI A01N 59/20 A01N 59/20 Z B08B 17/02 B08B 17/02 (58) Fields investigated (Int.Cl. ⁷ , DB name) ) A01N 1/00-65/02 A61L 2/00-2/26 C23C 14/00-14/58 G02C 1/00-13/00 G04B 1/00-49/04

Claims (2)

(57) [Claims] Respect 1. A titanium metal material performs sputtering a metal containing 0.1 to 15 wt% silver in the noble metal except silver as a target, noble metals including silver on the surface of the metallic material 1. A method for producing an article having antibacterial properties, which comprises forming a metal thin film made of 2. A metal material made of titanium is approximately 80 weights.
% Gold, 12% copper, 5% palladium
And a metal thin film made of a noble metal containing silver is formed on the surface of the metal material by sputtering using a metal of about 3% by weight of silver as a target.