JPH0848558A - Antimicrobial tile and its production - Google Patents

Abstract

PURPOSE:To produce an antimicrobial tile capable of imparting an antimicrobial property to an once fired tile too, revealing a surface pattern of a tile green body, and also hardly sticking dirt, etc., on its surface and to provide its producing method. CONSTITUTION:This antimicrobial tile 1 is produced by forming a protecting layer 4 consisting of a vitreous permeating material and having <=20mum thickness on the surface of a tile and allowing an antimicrobial material 5 to coexist in this protecting layer 4. The vitreous permeating material incorporated with the antimicrobial material is applied on the surface of a green body of the tile formed by incorporating a pigment in a waste soil and burned to obtain the product tile. Moreover, a starting material for the pattern is mounted by a non-contacting method on the surface of the green body of the tile, then, the vitreous permeating material incorporated with the antimicrobial material is applied on the whole surface of the green body of the tile, and burned to obtain a patterned product tile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial tile in which a protective layer capable of protecting the tile surface and imparting antibacterial property without forming the surface pattern of the once baked tile itself is formed, and its production. It is about the method.

[0002]

As an antibacterial substance, ceramic is silver,
It is well known that copper, zinc, etc. are supported and that zeolite is supported by silver. These antibacterial substances are widely used by being dispersed, adsorbed or coated on fibers, synthetic resins, etc., and are highly safe.

However, although these antibacterial substances are expensive, they have a drawback that their antibacterial activity is relatively weak because the surface exposure of the antibacterial substance is small.

Further, in the past, there has been disclosed a technique in which particles of antibacterial zeolite are dispersed in a coating material to coat the coating material.
No. 43 publication. This conventional technique involves applying a paint to the surface of a tile or the like on which a coating is to be formed, spraying particles of the antibacterial zeolite substantially uniformly before the surface of the paint is dried, and then heating. By this, a coating film is formed on the surface of a tile or the like, and at the same time, particles of antibacterial zeolite are fixed on the coating film.

Furthermore, there is a technique applied to Japanese Patent Application No. 1-1112372 (Japanese Utility Model Application No. 3-50032) for imparting antibacterial properties to tiles. This antibacterial tile
A radioactive mineral powder, a silver mineral powder, a copper mineral powder, and a zinc oxide powder are selected individually or in plural kinds, mixed with a kneaded clay as a raw material of a tile, pressed, and fired.

Further, in this prior art, an inorganic powder selected from the group consisting of radioactive mineral powder, silver mineral powder and copper mineral powder, and a group selected from zeolite, silicon dioxide, aluminum oxide, zirconium oxide and the like. An antibacterial tile is also obtained by firing the inorganic oxide powder and the ceramic powder, and then firing. Furthermore, the antibacterial tile is also obtained by press-molding only the above-mentioned inorganic powder and then firing it. In this prior application technique, the generation of mildew is prevented by the irradiation of radiation from the inorganic powder or the antibacterial action of silver or the like.

[0007]

However, in the technique disclosed in Japanese Patent Laid-Open No. 4-33843, it is necessary to form a tile as a product and then form a coating film having an antibacterial action on the surface of the tile. However, it is necessary to go through at least two firing or drying steps, which is disadvantageous in terms of cost.

Further, the tile of this conventional example is decorated by a glaze layer applied on the surface of the tile, and a so-called once-baked kneaded tile or a tile green substrate in which the tile base itself develops a pattern. It was not possible to apply it to once-baked tiles that had a dry pattern on the surface.

On the other hand, in the prior art described in the prior application of Japanese Patent Application No. 1-1112372, an antibacterial material is mixed in the tile base material, and the tile surface must be glazed. That is, in this prior application technology, when the tile surface is glazed, the antibacterial material contained in the tile base is not exposed to the surface, and it is impossible to form a pattern by glaze the tile surface. It has been exposed, and dust and the like are likely to adhere to the fine uneven surface of the tile surface to easily stain it, which has the drawback of impairing the aesthetics of the tile and the drawback of being difficult to clean.

[0010]

SUMMARY OF THE INVENTION The present invention has been made by improving and removing the above-mentioned conventional problems, and can impart antibacterial properties even to a once-baked tile, and, moreover, the surface of the tile base material. It is intended to provide an antibacterial tile in which a pattern is revealed and at the same time, dirt or the like is unlikely to adhere to the surface and a method for producing the same.

In order to solve the above-mentioned problems, the means of claim 1 adopted by the present invention forms a protective layer of 20 μm or less in thickness of a vitreous transparent material on the surface of a tile and protects it. The antibacterial tile is characterized in that an antibacterial material is mixed in the layer.

The means of claim 2 adopted by the present invention is
An antibacterial feature characterized by applying a glassy permeable material mixed with an antibacterial material to the surface of a tile green body formed by mixing a pigment in a kneaded clay and firing it to obtain a product tile. It is a method of manufacturing tiles.

Further, according to the means of claim 3 adopted by the present invention, the patterning raw material is placed on the surface of the tile green substrate in a non-contact manner, and thereafter, the antibacterial material is applied to the entire surface of the tile green substrate. A method for producing an antibacterial tile is characterized in that a glassy transparent material mixed in is applied and fired to obtain a product tile.

[0014]

According to the means of claim 1 adopted by the present invention,
A protective layer having a thickness of 20 μm or less made of a vitreous transparent material is formed on the surface of the tile, and an antibacterial material is mixed in the protective layer. The protective layer is a glassy transparent material, and it is possible to confirm the surface pattern of the tile base. Therefore, even if it is a so-called kneaded tile in which the entire base material of the tile exhibits a pattern, it is possible to expose the pattern of the base material itself, and moreover, the fine uneven surface of the tile surface is smoothed by the protective layer, dust etc. There is no sticking.

According to a second aspect of the present invention, a glass material obtained by mixing an antibacterial material on the surface of a green body of a so-called kneaded tile formed by mixing a pigment in a kneaded clay and molding. The product tile is obtained by applying the transparent material of No. 1 and baking. The permeation material mixed with the antibacterial material is applied to the surface of the green body of the kneading tile and fired. Since the firing process is performed only once, the production equipment, the number of production steps, and the cost are significantly increased. Reduction is possible.

Further, in the means of claim 3 adopted by the present invention, the patterning raw material is placed on the surface of the tile green substrate in a non-contact manner, and thereafter, on the entire surface of the tile green substrate, A glassy transparent material mixed with an antibacterial material is applied and fired to obtain a product tile, which is the same as the means of claim 2 except for the method of forming the surface pattern of the tile raw material. .

[0017]

The following is a description of the antibacterial tile of the present invention and the method for producing the same, based on the examples shown in the drawings. FIG. 1 is a vertical sectional view showing an antibacterial tile 1 according to the first embodiment of the present invention. As shown in the figure, in the antibacterial tile 1 of this embodiment, the pigment 2 is mixed in the substrate 2 itself, and the substrate 2 itself has a decorative pattern. Of course, the whole base material 2 may be colored, and a plurality of pigments 3 may be mixed.

A protective layer 4 made of a glassy transparent material is formed on the surface of the tile base 2. This protective layer 4
Has a thickness of 20 μm or less, preferably 5
A range of up to 15 μm is suitable. The reason why the thickness of the protective layer 4 is limited to 20 μm or less is that if the thickness is more than 20 μm, the texture (base material) is impaired. Further, an antibacterial material 5 is mixed in the protective layer 4 made of this glassy transparent material. Examples of the glassy transparent material forming the protective layer 4 include zinc-based, lime-based, and lithium-based materials containing feldspar as a main component.

The antibacterial material 5 is a material having a general antibacterial action such as metallic silver, silver oxide or a silver compound which is water-soluble or sparingly soluble in water, and which can withstand high temperatures. used. The antibacterial zeolite is an ion-exchangeable sodium ion, a calcium ion, a potassium ion, a magnesium ion, a part or all of the iron ion in the zeolite, and a metal ion such as an iron ion, a silver ion, a copper ion, and a zinc ion. It was exchanged.

Next, a method of manufacturing the antibacterial tile 1 of the first embodiment will be described. First, using a kneaded material in which a predetermined pigment is mixed into a tile raw material, a tile green body having a decorative pattern as a whole is formed. Subsequently, a vitreous transparent material mixed with the antibacterial material 5 is applied to the surface side of the tile green substrate by thinly spraying, and the whole is baked.

On the surface of the antibacterial tile 1 as a product obtained after firing, a protective layer 4 having a thickness of 20 μm or less that is permeable is formed. When the vitreous transparent material is applied to the surface of the tile green substrate by curtain or button hanging, the thickness becomes 50 to 300 μm, and the kneading pattern formed on the tile substrate itself appears as it is. The decorative effect cannot be obtained, and the effect of the kneading tile is reduced. Therefore, the protective layer 4 must be formed by spraying. The thickness of the protective layer 4 must be 20 μm or less.

Further, by spraying the glassy transparent material on the green body, the transparent material is introduced into the green body by 200 to 300 μm.
Penetrates into the pores of the green body at a depth of, and is integrated with the base material by firing. Therefore, the bonding strength with the tile of the protective layer 4 made of a glassy permeable material containing these antibacterial materials becomes incomparably superior to the case where the paint is simply applied to the surface of the product tile. .

FIG. 2 is a vertical sectional view showing an antibacterial tile 6 according to the second embodiment of the present invention. As shown in the figure, the antibacterial tile 6 of this embodiment has a two-layer structure composed of a base 7 whose base material is only a normal kneaded clay and a kneaded base material 2 in which a pigment 3 is mixed. . The formation of the two-layer structure is
The kneaded material may be filled in two times. The rest of the configuration and the operational effects are the same as in the case of the first embodiment, and the explanation here is omitted.

3 (a) to 3 (c) are vertical sectional views of the tile in each step showing the method for manufacturing the antibacterial tile 8 according to the third embodiment of the present invention. In the third embodiment, first, the tile green body 7 is pressure-molded by using an ordinary kneaded clay. Next, as shown in FIG. (B), a patterning raw material (dry powder) 9 sprinkled with a pigment and a kneaded clay is dropped and supplied to the surface of the tile green substrate by a non-contact type using a screen printing machine or the like. And form a pattern.

Then, as shown in FIG. 3C, a glassy transparent material mixed with an antibacterial material may be applied and baked. The third embodiment is different from the second and third embodiments only in that a pattern forming method is a kneading method or a dry coating method, and other configurations and operational effects are the same. Is.

By the way, the present invention is not limited to the above-mentioned embodiments, but can be appropriately modified. For example, as the antibacterial material and the vitreous transparent material, an appropriate material may be selected from the above-mentioned examples and used.

[0027]

As described above, in the antibacterial tile of the present invention, a protective layer having a thickness of 20 μm or less made of a glassy transparent material is formed on the surface of the tile, and the antibacterial material is provided in the protective layer. Since they are mixed, the surface pattern of the tile base can be confirmed through the protective layer, and the antibacterial material in the protective layer can exert an antibacterial action. In addition, since the fine uneven surface of the tile surface is smoothed by the protective layer, it is difficult for dust and the like to adhere and cleaning is easy.

Further, according to the method for producing an antibacterial tile of the present invention, the vitreous transparent material prepared by mixing the antibacterial material is applied to the tile raw material by spraying and firing, and the firing step is performed. Since there is only one process, it is possible to significantly reduce manufacturing equipment, the number of manufacturing processes, and costs.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an antibacterial tile according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of an antibacterial tile according to a second embodiment of the present invention.

FIG. 3A to FIG. 3C are vertical sectional views of tiles during a manufacturing process according to a third embodiment of the present invention.

[Explanation of symbols]

1 ... Antibacterial tile 2 ... Base material 3 ... Pigment 4 ... Protective layer 5 ... Antibacterial material 6 ... Antibacterial tile 8 ... Antibacterial tile 9 ... Patterning raw material

Claims (3)

[Claims] 1. An antibacterial tile characterized in that a protective layer of glassy transparent material having a thickness of 20 μm or less is formed on the surface of the tile, and an antibacterial material is mixed in the protective layer. 2. A product tile is obtained by applying a vitreous transparent material containing an antibacterial material to the surface of a tile green body formed by mixing a pigment in a kneaded clay and firing the product. A method for producing an antibacterial tile, characterized by: 3. A non-contact type patterning material is placed on the surface of a tile green substrate, and then a glassy transparent material mixed with an antibacterial material is applied to the entire surface of the tile green substrate. A method for producing an antibacterial tile, which comprises firing to obtain a product tile.