JP2737857B2 - Manufacturing method of non-slip ceramic products - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing non-slip ceramic products such as tiles and non-slip road rugs having anti-slip irregularities on the surface.

[Prior art] Conventionally, as a treatment method for forming a non-slip on the surface of such ceramic products, a method of forming irregularities on the surface by pressing at the stage of green body, as described in JP-A-60-208554 In addition, a method of forming irregularities during glaze baking by mixing fine particles having a melting point higher than the glaze baking temperature in the glaze, and further, as described in JP-A-61-242256, There is a method of forming an uneven surface and the like.

Also, in Japanese Utility Model Laid-Open No. 1-110238, a coarse-grained silicon carbide abrasive is mixed into a glaze obtained by mixing and decomposing ultra-hard particles made of ceramics such as alumina, and the surface of the tile base is glazed and fired. Stop tiles are known.

[Problems to be solved by the invention]

However, the method of forming unevenness by pressing has a disadvantage that the unevenness is too simple to form a fine unevenness.

In addition, in the method of mixing fine particles in the glaze, the uneven surface is covered with the glaze, and since the fine particles must be used, the anti-slip effect cannot be expected much. Has the disadvantage of not being permanent.

Furthermore, the formation of unevenness by thermal spraying has a problem in adhesion between the base material and the sprayed material, and has a disadvantage that the sprayed layer is easily peeled off from the surface of the base material.

The superhard glaze baked with silicon carbide abrasive is glazed and baked, but it is only a planar bond and the bonding force that links the particles is weak. However, there is a drawback that dust easily accumulates and dirt easily adheres.

An object of the present invention is to provide a method for manufacturing a ceramic product having permanent anti-slip irregularities formed on a surface thereof by a relatively simple process by overcoming such disadvantages.

[Means for solving the problem]

The present invention, a ceramic material having a melting point higher than the firing temperature, and a ceramic material having a lower melting point than the firing temperature, on the base surface of the ceramic product, were each granulated and mixed, and coated and pressed to a certain thickness. Thereafter, a method of manufacturing a ceramic product to be fired, wherein the content of the ceramic material particles having a melting point higher than the firing temperature is set to such an extent that the surface of the base material is not visible after firing, of the total amount of the ceramic material particles coated with the press. This is a method for producing a non-slip ceramic product.

The firing temperature of the coating material for forming unevenness varies depending on the ceramic product, but in the case of a normal tile, a temperature of 1150 to 1300 ° C is usually used from the viewpoint of reducing the water absorption.

In firing at the same temperature, from the viewpoint of the adhesion of the coating material to the substrate and the strength, it is desirable that the low melting point material be a bright glaze at the firing temperature and have a melting point of about 1100 ° C.

As the high melting point material, a raw material having the same composition as the raw material having a melting point higher than the firing temperature is used.

When granulating such a mixture, a granulated material having a melting point of about 0.1 to 5 mm is particularly desirable as a high melting point material from the viewpoint of a non-slip effect due to a height difference (fall) of unevenness.

[Action]

By heating and firing the granulated mixture coated on the ceramic product substrate surface to a temperature at which only low melting point materials are melted,
The low-melting material that has melted surrounds the high-melting particles due to surface tension, or enters the gaps between the particles, leaving the high-melting material and depressing the portion of the low-melting material. In addition, irregularities having a sufficient drop to exhibit a slip prevention function are formed.

By using a mixture of granulated low melting point and high melting point powder materials, unlike the case of simply using a powder mixture, by adjusting the particle size of each granulated material, it is possible to arbitrarily change the unevenness state of the base surface Can be adjusted.

Also, unlike the case where high melting point fine powder is used in the glaze, each particle of the high melting point material is wrapped in the low melting point material, so that there are few fine depressions and corners and a smooth surface can be obtained. In addition, there is an effect that dirt hardly accumulates and dirt and the like hardly adhere.

〔Example〕

Hereinafter, an example of forming uneven anti-slip on a tile surface as an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

(1) Preparation of coating material As a high melting point material, 40% by weight of feldspar, 30% by weight of clay, and 30% by weight of pottery stone are wet-granulated to prepare a high melting point material 1 having a diameter of 0.1 to 2 mm. As materials, feldspar 30% by weight, lime 15
5% by weight, clay 5% by weight, zinc white 5% by weight, silica stone 5% by weight
Was wet granulated to prepare a low melting point material 2 having a diameter of 0.1 to 2 mm. Then, in order to make the content of the high melting point material 1 such that it cannot be seen from the surface of the base material after firing, 80% by weight of the granulated material of the high melting point material 1 and 20% by weight of the granulated material of the low melting point material 2 are mixed. Thus, a coating material 3 was prepared.

(2) Coating on Substrate Referring to FIG. 1, the coating material 3 prepared in (1) was uniformly coated on the surface of the tile substrate 4 to a thickness of 2 mm using a press machine.

(3) Firing of the coating material The tile substrate 4 having the coating material 3 was heated in an oxidizing atmosphere at 1250 ° C for 20 hours by a tunnel furnace.

(4) Aspect of Product In this firing step, as shown in FIG. 2, the low-melting material 2 is almost completely melted and penetrates into the laminated high-melting material 1 due to its surface tension. The concave portion 5 is formed irregularly so as to cover the surface and wrap the portion of the high melting point material 1. The high-melting point 1 is laminated so that the surface of the base material cannot be seen.
Which forms an anti-slip structure.

FIG. 3 shows the surface condition of the tile 10 obtained by the same process.

Referring to the figure, the concave portion 5 exists as a vitrified irregular black portion, and the protrusion 6 exists as a white portion. A pattern was formed, and the difference between the irregularities was 0.1 to 1.0 mm.

〔The invention's effect〕

(1) Non-slip can be formed relatively easily in the firing step without requiring mechanical processing to provide an anti-slip effect.

(2) Since the non-slip product of the present invention has a smooth glass-like surface without fine dents and corners, dirt is less likely to adhere, and even if it adheres, cleaning becomes easier.

(3) By using the same base material for ceramic products such as tiles and the material having a high melting point, the familiarity of firing is better than when a completely different material is used, and the strength of the tiles can be increased.

(4) By changing the type, proportion, and the like of the granulated material of the low-melting-point material and the granulated material of the high-melting-point material, the distribution of irregularities and the state of coloring can be freely changed.

(5) The lamination of the high-melting-point material is joined and fitted together, and a stone-wall-like lamination that does not change the structure as pressed is formed. High-melting-point material particles can be bonded together, macroscopically almost uniform, partially uneven unevenness can be formed, and a non-slip product can be easily obtained. A ceramic product that can form a light and shade pattern and can use not only a simple anti-slip function but also a gloss and a delicate pattern can be obtained.

(6) The surface state of gloss, pattern, and unevenness can be maintained almost permanently.

(7) By pressing the granulated ceramic material to a certain thickness, without changing the laminated structure of the high-melting particles as pressed, the particles can be reliably bonded by melting the low-melting particles. Prevention of peeling is achieved.

[Brief description of the drawings]

The attached drawings show embodiments of the present invention. FIG. 1 is a cross-sectional view showing a state in which a coating material is formed on the tile surface, FIG. 2 is a cross-sectional view showing a state of forming irregularities after firing, and FIG. 3 is a plan view showing the surface state. 1: High melting point material, 2: Low melting point material 3: Coating material, 4: Tile base 5: Concavity, 6: Projection 10: Tile

Claims (1)

(57) [Claims] A ceramic material having a melting point higher than the firing temperature and a ceramic material having a melting point lower than the firing temperature are granulated and mixed on the surface of the ceramic product to a predetermined thickness and pressed. Then, it is a method of manufacturing a ceramic product to be fired, the content of the ceramic material particles having a melting point higher than the firing temperature, out of the total amount of the press-coated ceramic material particles, such that the surface of the base material is not visible after firing. A method for manufacturing a non-slip ceramic product, characterized by the following: