JP2001073435A - Sanitary ware and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent adhesion of dirt to sanitary ware so as to suppress deterio ration of gloss on its surface by preparing a glaze material by mixing a transpar ent glaze material including no pigment nor opacifier with a coloring constituent including SnO2 at a specific ratio to the total of both constituents, applying the glazing material to sanitary ware forming base material for forming a glazed body, and burning the glazed body at a specific temperature. SOLUTION: A glaze including of the glaze material composed of SnO2 as an opacifier and other pigments is applied to a sanitary ware forming base material, and the glazed base material is burnt at 800-1300 deg.C. Alternatively, a glaze including a glazing material composed of an amorphous glaze, SnO2 as an opacifier and other pigments is applied to a ware base material, and the glazed base material is burnt at 800-1300 deg.C. Especially, SnO2 has no characteristic to shift to the glaze surface and the like during the burning process, so that an uneven part forming constituent based on corrosion of glass under an alkaline environment can be reduced. Especially, if a ratio of SnO2 to the whole metal constituents in the glaze is set 5.0 wt.% or higher, sufficient effect can be exhibited. Consequently, sanitary ware hardly affected by sticking dirt and provided with durable gloss can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sanitary ware such as toilets, urinals, hand washers, washbasins, and the like, having a surface to which dirt does not easily adhere over a long period of time, and a method for producing the same.

[0002]

2. Description of the Related Art In general, an emulsifier or a pigment is added as a coloring agent to a glaze material used for sanitary ware such as sanitary ware in order to conceal the color of the base material and to impart a color with a design. ing. In particular, zircon is generally used as an emulsifier because of problems such as cost.

[0003]

In sanitary ware, for example, in a toilet bowl, it is used in an environment based on ammonia because it is used in an environment where urine is applied, and in a wash basin, it is used in an environment where hands are washed with soap. Also used in alkaline environment. These conventional sanitary wares have a problem that the surface roughness Ra gradually increases in an alkaline environment, so that dirt easily accumulates on the unevenness, and the gloss deteriorates. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sanitary ware having a surface on which dirt does not easily adhere and gloss does not easily deteriorate, and a method for manufacturing the sanitary ware.

[0004]

The above-mentioned unevenness is caused by the erosion of the glass portion on the glaze surface due to an alkaline environment, which is caused by an emulsifier near the glaze surface or crystalline during the firing process. It is presumed that the silica particles were not sufficiently vitrified and the remaining silica particles formed convex portions. In particular, zircon, which is generally used as an emulsifier, has the property of moving to the glaze surface during the firing process. Therefore, more irregularities are created in the alkaline environment. In the present invention, a glaze coating is formed by applying a glaze material obtained by mixing a transparent glaze raw material containing no pigment and emulsifier and a coloring component containing SnO2 to a sanitary ware molding base. Process and its glaze coating 800 ~ 13
Baking at a temperature of 00 ° C .. By using SnO2 instead of zircon as a coloring component, SnO2 does not have the property of migrating particularly to the glaze surface during the sintering process. As a result, the amount of the emulsifier near the glaze surface and the alkaline environment do not depend on the use of zircon. The number of projections formed by erosion of glass can be reduced. It is also expected that the antifouling property is exhibited by the effect of SnO2 itself present on the glaze surface. The SnO2 has a sufficient effect as an emulsifier, and in order to obtain a sufficient effect of reducing unevenness due to an alkaline environment, 5.0% by weight or more as an oxide with respect to all metal components in the glaze layer. It is preferably contained.

In a preferred embodiment of the present invention, the glaze material has a 50% particle size of 5 μm or less. Thereby, the silica particles which are crystalline and are not sufficiently vitrified in the firing process for forming the convex portions can be reduced.

[0006] In a preferred embodiment of the present invention, an amorphous glaze raw material obtained by previously melting a transparent glaze raw material at a high temperature is contained. As a result, the silica particles that are crystalline and are not sufficiently vitrified during the firing process for forming the convex portions can be reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a glaze raw material is
A mixture of natural mineral particles such as silica sand, feldspar, and clay.
In addition, the amorphous glaze refers to a glaze obtained by melting a glaze raw material composed of a mixture of natural mineral particles and the like at a high temperature and vitrifying as described above. For example, frit glaze can be suitably used.

[0008] Manufacturing of sanitary ware according to an embodiment of the present invention 1
In one method, for example, a glaze made of SnO2 or another pigment as an emulsifier is applied to a ceramic molding substrate and fired at a temperature of 1100 to 1300 degrees. In this case, it is preferable that the glaze has a 50% particle size of 5 μm or less. Another method of manufacturing the sanitary ware according to the embodiment of the present invention is, for example, applying a glaze composed of a glaze raw material and an amorphous glaze, SnO2 as an emulsifier, or another pigment to a ceramic molding substrate, Baking at a temperature of 1300 degrees.

[0009] By manufacturing in accordance with the above method, it is possible to reduce unevenness caused by using in an alkaline environment,
As a result, it becomes a sanitary ware which is hardly adhered to dirt and has little deterioration in gloss.

[0010]

【Example】

[0011]

[Table 1]

Comparative Example 2 kg of a glaze raw material having the composition shown in Table 1 and 10% by weight of zircon added thereto, 1 kg of water, and 4 kg of cobblestone were put into a 6-liter pottery pot.
It was ground for about 18 hours by a ball mill. When the particle size of the glaze slurry obtained after the pulverization was measured using a laser diffraction type particle size distribution meter (Nikkiso Co., Ltd., Microtrack laser type particle size analyzer FRA), 65% and 50% were 10 μm or less.
The average particle size (D50) was 5.8 μm. Next, a 70 × 150 mm plate-shaped test piece was prepared using a sanitary ware base slurry prepared using silica sand, feldspar, clay and the like as raw materials. The glaze obtained as described above was applied on the plate-like test piece by a spray coating method, and 1100
A sample was obtained by firing at ~ 1200 ° C. The surface roughness and gloss of the obtained sample were measured before and after the alkali resistance test. The alkali resistance test was performed by preparing a 5% aqueous sodium hydroxide solution, immersing half of the sample in the aqueous solution, heating the whole to 70 ° C., and allowing it to stand for 24 hours. Thereafter, the sample was taken out of the aqueous solution, washed with running water, and various measurements were performed. The surface roughness of the sample surface is measured using a stylus type surface roughness measuring device (JIS-B0
651), the center line surface roughness Ra was measured. As a result, the surface roughness before the alkali resistance test was Ra = 0.10
μm, surface roughness after alkali resistance test is Ra = 0.25 μm
m. The gloss measurement is performed by measuring the surface of the sample before and after the alkali resistance test with a gloss meter (MINOLTA, GM-060), and maintaining the gloss (= [gloss after the alkali resistance test] / [gloss before the alkali resistance test] ]). The surface after the alkali resistance test was deteriorated in glossiness due to the influence of the silica particles and the emulsifier, and the glossiness retention ratio was 43.2%, which was less than half.

Example 1 2 kg of 10% by weight of SnO2 added to a glaze raw material having the composition shown in Table 1, 2 kg of water and 4 kg of cobblestone were placed in a 6-liter pottery pot, and were subjected to a ball mill for about 18 hours. Crushed. When the particle size of the glaze slurry obtained after the pulverization was measured using a laser diffraction type particle size distribution meter (Nikkiso Co., Ltd., Microtrack Laser Type Particle Size Analyzer FRA), 65% was found to be 10 μm or less.
The 0% average particle size (D50) was 5.8 μm. next,
Using a sanitary ware body slurry prepared using silica sand, feldspar, clay and the like as raw materials, a 70 × 150 mm plate-shaped test piece was prepared. The glaze obtained as described above was applied to the plate-like test piece by a spray coating method,
A sample was obtained by firing at 00 to 1200 ° C. The surface roughness and gloss of the obtained sample were measured before and after the alkali resistance test. The surface roughness of the sample surface is
The center line surface roughness Ra was measured using a stylus type surface roughness measuring device (JIS-B0651). As a result, the surface roughness before the alkali resistance test was Ra = 0.08 μm, and the surface roughness after the alkali resistance test was Ra = 0.16 μm. The gloss measurement is performed by measuring the surface of the sample before and after the alkali resistance test with a gloss meter (MINOLTA, GM-060), and maintaining the gloss (= [gloss after the alkali resistance test] / [gloss before the alkali resistance test] ]). On the surface after the alkali resistance test, the deterioration of the glossiness due to the effect of the emulsifier was reduced, and the glossiness maintenance ratio was 68.3%.

(Example 2) 2 kg of 10% by weight of SnO2 added to a glaze raw material having the composition shown in Table 1, 2 kg of water and 4 kg of cobblestone were put into a 6-liter pottery pot, and were subjected to a ball mill for about 24 hours. Crushed. The particle size of the glaze slurry obtained after pulverization was measured using a laser diffraction type particle size distribution meter (Nikkiso, Microtrack laser type particle sizer FRA).
The 0% average particle size (D50) was 3.9 μm. next,
Using a sanitary ware body slurry prepared using silica sand, feldspar, clay and the like as raw materials, a 70 × 150 mm plate-shaped test piece was prepared. The glaze obtained as described above was applied to the plate-like test piece by a spray coating method,
A sample was obtained by firing at 00 to 1200 ° C. The surface roughness and gloss of the obtained sample were measured before and after the alkali resistance test. The surface roughness of the sample surface is
The center line surface roughness Ra was measured using a stylus type surface roughness measuring device (JIS-B0651). As a result, the surface roughness before the alkali resistance test was Ra = 0.05 μm, and the surface roughness after the alkali resistance test was Ra = 0.07 μm. The gloss measurement is performed by measuring the surface of the sample before and after the alkali resistance test with a gloss meter (MINOLTA, GM-060), and maintaining the gloss (= [gloss after the alkali resistance test] / [gloss before the alkali resistance test] ]). The surface after the alkali resistance test has reduced gloss deterioration due to the influence of silica particles and emulsifier,
The gloss retention was 77.6%.

(Example 3) SnO2 was added to a mixture of a glaze material having the composition shown in Table 1 and an amorphous glaze at a ratio of 3: 7.
Weight 2%, water 1kg and cobblestone 4kg
The mixture was placed in a 6-liter pottery pot and ground by a ball mill for about 18 hours. The particle size of the glaze slurry obtained after the pulverization was measured using a laser diffraction type particle size distribution meter (Nikkiso Co., Ltd., Microtrack laser type particle sizer FRA).
0) was 5.8 μm. Next, a 70 × 150 mm plate-shaped test piece was prepared using a sanitary ware base slurry prepared using silica sand, feldspar, clay and the like as raw materials. The glaze obtained as described above is applied to the plate-shaped test piece by a spray coating method, and is applied at 1100 to 1200 ° C.
A sample was obtained by baking with. About the obtained sample,
The surface roughness and gloss before and after the alkali resistance test were measured. As for the surface roughness of the sample surface, the center line surface roughness Ra was measured using a stylus type surface roughness measuring device (JIS-B0651). As a result, the surface roughness before the alkali resistance test was Ra = 0.04 μm, and the surface roughness after the alkali resistance test was Ra = 0.06 μm. The gloss was measured by measuring the surface of the sample before and after the alkali resistance test with a gloss meter (MINOLTA, GM-0).
60), and expressed as a gloss retention (= [gloss after alkali resistance test] / [gloss before alkali resistance test]). On the surface after the alkali resistance test, the deterioration of glossiness due to the influence of silica particles and emulsifier is reduced, and the gloss retention rate is 79.
9%.

[0016]

[Table 2]

The results are shown in Table 2. As described above, by replacing zircon with SnO2, and by reducing silica particles remaining undissolved in addition thereto, the retention of Ra after the alkali resistance test and the improvement of the retention of glossiness are improved. , Even in actual use as sanitary ware,
It is assumed that the filth is easily removed over a long period of time.

[0018]

According to the present invention, the smoothness and glossiness of the surface can be maintained for a long period of time by using SnO2 as an emulsifier and by eliminating undissolved silica particles, and the antifouling property can be maintained. Excellent sanitary ware can be obtained.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Atsushi Yoshida, Inventor 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Tochiki Kiki Co., Ltd. (72) Masami Ando 2, Nakajima, Kitakyushu-shi, Fukuoka Prefecture No. 1-1, Toto Kiki Co., Ltd. (72) Inventor Shin Hayakawa 2-1-1, Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture Toko Kiki Co., Ltd. (72) Koichi Hayashi Kokura, Kitakyushu-shi, Fukuoka Prefecture 2-1-1 Nakajima, Kita-ku Totoki Kiki Co., Ltd. F-term (reference) 2D039 AA01 AA04 DB04

Claims (5)

[Claims] 1. A glaze coating is formed by applying a glaze material obtained by mixing a transparent glaze raw material containing no pigment and emulsifier and a coloring component containing SnO2 to a sanitary ware molding base. And the glaze coating is 800 ~
Baking at a temperature of 1300 ° C. 2. The glaze material comprises: a transparent glaze raw material not containing a pigment and an emulsifier; and a coloring component containing SnO2,
The ratio of SnO2 to the sum of these is 5.0% by weight.
The method for producing sanitary ware according to claim 1, wherein the method is a glaze material obtained by mixing as described above. 3. The method according to claim 1, wherein the glaze material is a particulate glaze material having a 50% particle size of 5 μm or less. 4. The method for producing sanitary ware according to claim 1, wherein the transparent glaze raw material contains an amorphous glaze raw material. 5. A sanitary ware which can be produced by the production method according to claim 1.