JP2001140319A - Manufacturing method for antibacterial pottery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for antibacterial pottery generating no defect caused by the coagulation of an antibacterial agent. SOLUTION: This manufacturing method for antibacterial pottery includes a process for crushing a glaze, a process for mixing the glaze and the silver- containing antibacterial agent to form a mixture, a process for applying the mixture on a pottery forming base to form a glaze-coated object, and a process for baking the glaze-coated object. The process for grinding the glaze and the process for mixing the glaze and the silver-containing antibacterial agent to form the mixture are conducted concurrently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing antibacterial porcelain.

[0002]

2. Description of the Related Art Typical methods for imparting antibacterial and antifungal properties to ceramic surfaces such as sanitary ware include a step of pulverizing a glaze, a step of mixing a glaze and a silver-containing antibacterial agent to form a mixture, A step of preparing the glaze coating by applying the mixture on a ceramic molding substrate, there is a method comprising a step of firing the glaze coating, in the step of preparing a mixture by mixing the glaze and silver-containing antibacterial agent, The antimicrobial agent itself is wet milled with a ball mill or a slurry prepared by stirring and dispersing with a high-speed mixer is stored, and a predetermined amount of the antimicrobial slurry is added to a separately milled and prepared glaze. And further pulverized and dispersed.

[0003]

However, when the above method is adopted, the dispersion of the antibacterial agent in the mixture is often insufficient, so that the coagulated antibacterial agent remains on the glaze surface after firing.
There was a problem that the appearance became defective. Therefore, an object of the present invention is to provide a method for producing an antibacterial porcelain that does not cause a defect caused by aggregation of an antibacterial agent.

[0004]

According to the present invention, in order to solve the above-mentioned problems, a step of pulverizing a glaze, which is conventionally performed separately,
Provided is a method for producing an antibacterial porcelain, characterized by simultaneously performing a step of preparing a mixture by mixing a glaze and a silver-containing antibacterial agent. By doing so, the degree of dispersion of the antibacterial agent with respect to the glaze is improved, and it is possible to provide a product that does not generate aggregates and has no defects on the glaze surface.

In a preferred embodiment of the present invention, a ball mill is used when the step of pulverizing the glaze and the step of mixing the glaze and the silver-containing antibacterial agent to form a mixture are performed simultaneously. The reason for using a ball mill is that it is a pulverizing means suitable for the purpose of the present invention because pulverization and mixing can be performed efficiently and simultaneously due to its characteristics. The material of the ball of the ball mill is silica and alumina. It is selected from components contained in glazes such as zirconia, and the diameter is preferably 20 to 10
0 mm.

[0006]

Embodiments of the present invention will be described below. In the present invention, the glaze refers to a slurry obtained by grinding feldspar, silica stone, lime, dolomite, alumina, zinc white, zircon, barium carbonate, sodium carbonate, lithium carbonate, frit, and the like to a predetermined particle size.

[0007] The silver-containing antibacterial agent is an inorganic heat-resistant powder or silver powder or silver oxide having silver having antibacterial properties carried on the surface layer. As typical inorganic heat resistant powders, calcium phosphate, anorthite, silica, alumina, zirconia, titania and the like are selected.

In the present invention, first, the glaze raw material is prepared. The glaze raw material may be a coarsely pulverized lump produced in nature or an artificially refined powder.

Next, a silver-containing antibacterial agent is prepared. The silver-containing antibacterial agent is a powder, but in consideration of the antibacterial effect and the effect on coloration, it is desirable that the particle size be somewhat small. Preferably, the particle size of the silver-containing antibacterial agent is set not to be larger than that of the glaze raw material having the smallest particle size.

In the present invention, a glaze raw material is charged into a ball mill in the same manner as in a usual glaze crushing step. At the same time, after the silver-containing antibacterial agent is charged into the ball mill, water and a predetermined additive are charged and pulverized to a predetermined particle size. The order of charging the silver-containing antibacterial agent is not particularly limited, and may be any time when the raw materials are charged. The subsequent refining process is the same as the usual glaze refining process, and after sieving and iron removal by a magnet filter, a sizing agent is added.

Then, the glaze is applied to a ceramic molding base such as sanitary ware and fired to obtain an antibacterial ceramic.

[0012]

EXAMPLES Specific examples will be described below.

[Table 1] (Formulation content)

(Examples) In the method of the present invention, the glaze raw material, silver-containing antibacterial agent,
Pre-watered alumina balls (diameter 40-100m)
m) is about 40% of the internal volume of the ball mill in the volume including the voids.
Was placed in a ball mill having an internal volume of 3 cubic meters and crushed for 24 hours to obtain an antibacterial glaze having an average particle size of about 6 μm.

Comparative Example Conventional method In the comparative example, a glaze having an average particle size of about 6 μm was obtained by putting the above-prepared contents except for the inner silver-containing antibacterial material into the same ball mill as in the example and pulverizing for 24 hours. Keep it. At the same time, a slurry was prepared by separately stirring and dispersing a silver-containing antibacterial agent with the same amount of water using a high-speed mixer, and mixed with the glaze for 2 hours with a large-scale stirrer to obtain an antibacterial glaze.

Next, the two types of glazes of the embodiment and the comparative example were glazed on a molded body of a sanitary ware basin, and then fired at 1200 ° C.
An antibacterial ceramic was obtained.

After the appearance of the obtained ceramic was evaluated, the ceramic was broken and the antibacterial property was evaluated. The antibacterial property was evaluated by the killing rate of Escherichia coli after 24 hours by a film adhesion method. Table 2 shows the results.

[0017]

[Table 2]

In the examples, there are no defects caused by the antimicrobial agent aggregates, and it can be confirmed that the method is superior to the comparative example. Further, it was confirmed that the antibacterial property did not change even when this method was adopted.

[0019]

According to the present invention, the step of pulverizing the glaze and the step of mixing the glaze and the silver-containing antibacterial agent to prepare a mixture are performed simultaneously, whereby the antibacterial pottery which does not cause aggregation of the antibacterial agent is obtained. It is possible to provide a manufacturing method.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiro Kawakami 2-1-1, Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture Inside Totoki Kiki Co., Ltd. (72) Toru Ueno 2 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture No. 1-1, Toto Kiki Co., Ltd. (72) Yasushi Nakajima Inventor Yasushi Nakajima 2-1-1, Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Toko Kiki Co., Ltd. (72) Inventor Yukinari Matsumoto Kokura, Kitakyushu-shi, Fukuoka 2-1, 1-1 Nakajima, Kita-ku Totoki Kiki Co., Ltd. (72) Inventor Minoru Suda 2-1-1, Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Touchi Kiki Co., Ltd. (72) Inventor Shigeyuki Yamada 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term (reference) 2D039 AA01 AA04 BA00 DB08 4H011 AA02 BA01 BB18 BC18 DA01 DC02 DC03 DC05 DD07

Claims (2)

[Claims] 1. A step of grinding a glaze, a step of mixing a glaze and a silver-containing antibacterial agent to form a mixture, a step of applying the mixture to a ceramic molding substrate to form a glaze coating, A method for producing an antibacterial ceramic, comprising a step of firing the glaze, wherein the step of pulverizing the glaze and the step of mixing the glaze and the silver-containing antibacterial agent to produce a mixture are performed simultaneously. Manufacturing method. 2. When simultaneously performing the step of pulverizing the glaze and the step of mixing the glaze and the silver-containing antibacterial agent to form a mixture,
The method for producing an antibacterial ceramic according to claim 1, wherein a ball mill is used.