JP2000319081A - Production of sanitary ware - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the surface roughness on the surface of a second glaze layer within a specific value and to maintain a function capable of removing stains for a long period with good reproducibility by applying a first glaze raw material containing pigments and/or an opacifier to the surface of an earthenware forming body, then applying a second glaze raw material containing molten silica, silica sand and/or feldspar as an SiO2 component thereto and firing the glaze raw materials. SOLUTION: The first glaze layer is colorable and contains the opacifier (e.g.: zircon) and the pigments. The second glaze layer is transparent and contains the SiO2 component, Al2O3 component, bivalent metal oxide components (e.g.: MgO, CaO, ZnO) and alkali metal oxides (e.g.: K2O, Na2O) as amorphous components. The glaze raw materials are respectively mixed and are pulverized at need by a ball mill, etc. After the coating application of the glaze raw materials, the glaze raw materials are fired at 800 to 1300 deg.C, by which the forming body is sintered and the two glaze layers are fixed. The surface roughness of the second glaze layer is confined to <=0.07 μm by a contact surface roughness measuring instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing sanitary ware such as a toilet, a urinal, a hand-washing machine, and a basin, which maintains a function of easily removing dirt for a long time.

[0002]

2. Description of the Related Art Conventionally, in the case of sanitary ware such as a toilet, a urinal, a hand-washing basin, and a wash basin, a glaze layer is generally applied to the surface of the porcelain body. As a glaze raw material, natural raw materials such as silica sand (quartz) and feldspar were used as main raw materials, and zircon and pigments as emulsifiers were added.

[0003]

However, in the conventional method as described above, quartz particles remain on the surface of the glaze layer without being completely vitrified and form recesses. In addition, the zircon particles and the pigment particles are exposed on the surface to form projections. Therefore, the surface roughness (Ra) is measured by a stylus type surface roughness measuring device (J
According to IS-B0651), it is 0.07 μm or more,
Dirt easily adhered to the pottery surface, and it was difficult to remove.

[0004]

The present applicant has filed Japanese Patent Application No.
No. 164177, the surface roughness (Ra) was 0.0 by a stylus type surface roughness measuring device (JIS-B0651).
A method for realizing a sanitary ware having a thickness of less than 7 μm, to which dirt hardly adheres and which is easy to remove has been proposed. The method is
The first glaze layer and the second glaze layer are provided on the sanitary ware body,
In the second glaze layer, do not add a zircon emulsifier that remains as particles after firing and forms a convex part, and minimizes the amount of residual quartz after firing that causes a concave part. In this method, an amorphous glaze raw material or a fine glaze raw material that has been previously melted is used as a glaze raw material.

The inventor of the present invention has conducted intensive studies on a method of manufacturing sanitary ware which can more reliably reduce the amount of quartz remaining in the second glaze layer after firing, and has completed the present invention. In an embodiment of the present invention, the first glaze layer of coloring is formed on the surface of the pottery substrate,
Further, a transparent second glaze layer is formed thereon, and the second glaze layer includes an amorphous component, and the amorphous component includes at least a SiO2 component, an Al2O3 component, and a divalent component. A method for producing a sanitary ware comprising a metal oxide component and an alkali metal oxide component, comprising the steps of: preparing a first glaze raw material containing a pigment and / or an emulsifier; Preparing a second glaze raw material that does not contain, applying the first glaze raw material to the surface of the pottery molding substrate, and applying the second glaze raw material;
Firing at １1300 ° C., wherein the supply material of the SiO 2 component of the second glaze material is fused silica,
A method for producing sanitary ware, characterized by using at least one selected from the group consisting of finely divided silica sand and finely divided feldspar. In a preferred aspect of the present invention, the step of preparing the second glaze raw material includes preparing a starting raw material containing silica sand and / or feldspar as a natural raw material, and pulverizing the starting raw material with a ball mill. Process and
3. A method for producing sanitary ware according to claim 1, comprising a step of pulverizing with a bead mill.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be used for sanitary ware such as toilets, urinals, washbasins, handwashers, and the like. In the case of toilet bowls, ball surfaces, traps, rim back, etc., in the case of urinals, ball surfaces, traps, sana, etc. Application is also effective.

As the glaze raw material, for example, a mixture of natural mineral particles such as silica sand, feldspar, limestone and the like or an amorphous glaze raw material can be used. Here, the amorphous glaze raw material, the glaze raw material consisting of a mixture of natural mineral particles and the like as described above is melted at a high temperature,
A vitrified glaze material, for example, frit glaze can be suitably used. The pigment is, for example, a cobalt compound, an iron compound, and the like, and the emulsifier is, for example,
Zircon, tin oxide and the like.

In the present invention, first, a first glaze raw material for forming a coloring glaze layer is prepared. To this end, the above-mentioned natural mineral particles such as silica sand, feldspar, and limestone may be mixed with a pigment and / or an emulsifier by a ball mill or the like and pulverized if necessary. A commercially available coloring glaze that has been added may be purchased.

Next, in order to prepare a second glaze raw material containing no pigment and no emulsifier for forming a transparent second glaze layer, natural mineral particles such as silica sand, feldspar and limestone are mixed with amorphous The ratio of the amorphous glaze to the sum of the two is preferably 50 to 99% by weight, more preferably 60 to 99% by weight.
Mix to 90%. This is mixed with a ball mill or the like and, if necessary, crushed to obtain the desired product.

Next, the first glaze raw material is applied to the surface of the sanitary ware molding base material, and the second glaze raw material is applied at least partially to the surface (glaze). Here, the term "at least a portion" refers to, for example, both application to a portion of the toilet bowl that is easily soiled, such as a ball surface, a trap portion, and a rim back, and application to the entire toilet bowl. The application method is
Well-known methods such as spray coating, flow coating, and printing can be used.

Thereafter, by firing at a temperature of 800 to 1300 ° C., the green body is sintered and the two glaze layers are fixed, and the surface roughness (Ra) is measured by a stylus type surface roughness measuring device (JIS). -B0651), less than 0.07 μm, preferably less than 0.05 μm, more preferably 0.1 μm.
It becomes a sanitary ware having excellent surface smoothness of less than 03 μm.

[0012]

【Example】

[Table 1]

(1) Preparation of First Glaze Raw Material 2 kg of glaze raw material having the composition shown in Table 1, 1 kg of water and 4 kg of sphere are placed in a 6-liter pottery pot and ball milled. Glaze raw material was obtained.

(2) Preparation of second glaze raw material Separately, a raw material having the composition shown in Table 1 except that zircon (ZrSiO ₄ ) as an emulsifier and a pigment were removed,
A glaze raw material 2 in which an amorphous glaze is adjusted such that the ratio of the amorphous glaze to the total sum of the two is 50 to 99% by weight.
Kg, 1 kg of water and 4 kg of sphere were placed in a 6-liter pottery pot and pulverized by a ball mill. here,
The diameter of the used sphere is φ20 mm to φ50 mm. Next, the glaze raw material obtained by ball milling was further subjected to bead mill pulverization to obtain a second glaze raw material. Here, beads of φ2 mm were used as beads.

(3) Preparation of Glazed Sample Next, a 70 × 150 mm plate-shaped test piece and a toilet bowl were prepared using a sanitary ware base slurry prepared from silica sand, feldspar, clay, etc. as raw materials. The thus obtained first glaze raw material slurry was applied to a plate-shaped test piece and a toilet bowl by a spray coating method, and a second glaze raw material slurry was further applied thereon by a spray coating method. At this time, the thickness of the coloring first glaze layer is 0.5 m.
m, the thickness of the transparent second glaze layer was adjusted to 0.3 mm. Then, the sample was obtained by firing at 1100 to 1200 ° C.

(4) Evaluation The glaze surface roughness (Ra) of the obtained plate-shaped test piece was measured. Surface roughness is measured by a stylus type surface roughness meter (JI
S-B0651), the center line surface roughness (Ra) was measured.

(Results) Ra was as good as about 0.04 μm.

[0018]

According to the present invention, the surface roughness of the surface of the second glaze layer can be easily reduced to less than 0.07 μm irrespective of manufacturing variations. As a result, it becomes possible to provide sanitary ware such as a toilet, a urinal, a hand-washing machine, and a wash basin that maintains a function of easily removing dirt over a long period with good reproducibility.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1. Sanitary ware base 2. First glaze layer (colorable glaze layer) 3. Second glaze layer (transparent glaze layer)

 ──────────────────────────────────────────────────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 1-1-1 Totoki Kiki Co., Ltd. (72) Inventor Hiroyuki Takada 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Tochiki 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

Claims (3)

[Claims] A first glaze layer having a coloring property is formed on a surface of a pottery substrate, and a second glaze layer having a transparency is further formed thereon. A method for producing sanitary ware, comprising an amorphous component, wherein the amorphous component includes at least a SiO2 component, an Al2O3 component, a divalent metal oxide component, and an alkali metal oxide component,
Providing a first glaze raw material containing a pigment and / or an emulsion; providing a second glaze raw material containing no pigment and / or an emulsifier; A step of applying a raw material, a step of applying the second glaze raw material, and a step of firing at 800 to 1300 ° C., wherein the supply material of the SiO 2 component of the second glaze raw material is fused silica; A method for producing sanitary ware, comprising using at least one selected from the group consisting of finely divided silica sand and finely divided feldspar. 2. The step of preparing the second glaze raw material,
2. The method according to claim 1, further comprising the steps of: preparing a starting material containing silica sand and / or feldspar as a natural raw material, crushing the starting material with a ball mill, and crushing with a bead mill. A method for producing the sanitary ware according to the above. 3. The production of sanitary ware according to claim 1, wherein the surface roughness Ra of the surface of the second glaze layer is less than 0.07 μm by a stylus type surface roughness measuring device. Method.