JP5482572B2 - Sanitary ware with antifouling matte surface - Google Patents

Description

  The present invention relates to sanitary ware such as toilets and washbasins, and more particularly to sanitary ware having a mat-like surface having excellent antifouling properties.

  In sanitary ware such as toilets and washbasins, a glaze layer is formed on the outermost surface in order to ensure a sanitary surface that is less likely to be contaminated with dirt and to ensure appearance design. The fact that dirt does not easily adhere does not make the user feel uncomfortable and can reduce the cleaning load on the user. Therefore, various proposals have been made for sanitary ware having a surface on which dirt is difficult to adhere.

  On the other hand, in order to ensure the appearance design of ceramics, setting the color, gloss, matte tone, etc., depending on the type of glaze. Among them, the matte surface (matte surface) has a more relaxed atmosphere than the luster surface, and therefore has a high-class surface. However, since the mat-like surface has fine irregularities on the surface, it is easy for dirt to adhere to it, and it is difficult to remove dirt that has entered the recess. Therefore, although matte surfaces are often used in tiles, forming matte surfaces on sanitary ware is not generally done.

  As a method of forming the surface of the mat-like surface, for example, a method of emulsifying a raw material to be a mat material into a glaze (for example, Japanese Patent Laid-Open No. 6-211541 (Patent Document 1)), crystals are precipitated during firing. There is a method (Japanese Patent Laid-Open No. 2-229736 (Patent Document 2)).

Japanese Patent Laid-Open No. 6-211541 JP-A-2-229736

  The present inventors have recently found a surface that is a mat-like surface and is difficult to adhere to dirt, and if this is applied to sanitary ware, it ensures a hygienic surface and has a calm and high-class feeling. I got the knowledge that sanitary ware can be realized. The present invention is based on such knowledge.

  Accordingly, an object of the present invention is to provide a sanitary ware having a matte tone and a surface exhibiting excellent antifouling properties.

In the sanitary ware according to the present invention, the surface property of the glaze layer formed on the outermost surface has an average height (Rc) defined by JIS B0601 (2001) of 2.5 μm or less, and the average height A value (Rc / RSm) obtained by dividing the length (Rc) by the average length (RSm) is greater than 9 × 10 ⁻³ .

  The sanitary ware according to the present invention has a matte-like surface, but has a property that dirt is difficult to adhere, and as a result, the sanitary surface is ensured while being calm, high-class, and therefore high in commercial value. Sanitary ware can be provided.

Definitions In the present invention, “sanitary ware” means pottery products used around toilets and toilets, specifically toilets, urinals, toilet bowl sana, toilet tanks, washbasin basins, hand-washing Means vessel. “Pottery” refers to ceramics that have a slightly baked-on base and water absorption and that have a glaze on the surface.

Surface property In the sanitary ware according to the present invention, the surface property of the glaze layer formed on the outermost surface has an average height (Rc) defined by JIS B0601 (2001) of 2.5 μm or less, preferably 0.5 μm or more and 2 .5 μm or less. At the same time, in the sanitary ware according to the present invention, the value (Rc / RSm) obtained by dividing the average height (Rc) defined by JISB0601 (2001) by the average length (RSm) is larger than 9 × 10 ^−3. , Preferably greater than 12 × 10 ⁻³ . Although the surface having such properties is matte (matte), it is difficult for dirt to adhere to it and it can be easily removed even if it adheres. The mat-like surface has a calm and high-class atmosphere, and by forming it on sanitary ware that has not previously formed a mat-like surface, it has an unprecedented commercial value. A sanitary ware can be provided.

  Although the sanitary ware according to the present invention has a matte tone, it is difficult for dirt to adhere to it and can be easily removed even if it adheres. It is contrary to the common sense that the traders have so far, and is accepted with unexpectedness. Such an effect is specifically clarified by the examples described later. There are many indicators of surface properties, especially the degree of smoothness or roughness. For example, in JIS, Ra (arithmetic average roughness (centerline average value)), Rsk (asymmetry), Run (sharpness), Rz (maximum height), Rc (average unevenness height) RSm (average wavelength of irregularities) is defined. Among these many, the above-mentioned value Rc and the value (Rc / RSm) are within a certain range, so that the matte tone and dirt are difficult to adhere and can be easily removed even if attached. Both were compatible. As shown in the examples described later, the present invention can be realized when the value Rc and the value (Rc / RSm) are within a certain range, and the effect of the present invention can be obtained even if one of the values slightly deviates. Absent.

  In the present invention, the matte tone means a surface state that is realized when the value Rc and the value (Rc / RSm) are in the above-mentioned range. A surface having a glossiness of about 40 or less, preferably 30 or less.

  According to a preferred aspect of the present invention, it is preferable that crystal particles are scattered on the surface of the glaze layer, and the crystal particles are precipitated in the firing step. That is, it is preferable that the crystal particles contained in the glaze do not remain in the glaze layer as they are, but all the crystal particles melt at the time of firing, and then the crystal particles are generated. And in the preferable aspect by this invention, the volume ratio of the said crystal grain in a glaze layer shall be 20 vol%-30 vol%.

Further, according to a preferred embodiment of the present invention, the crystal particles are crystals of a divalent alkaline earth element compound, for example, diopside (CaO—MgO-2SiO ₂ ) or anorsite (CaO—Al ₂ O _3). it is preferably -SiO _2).

  In the sanitary ware according to the present invention, the surface having the above-mentioned properties may be formed on all surfaces of the sanitary ware. Preferably, the bowl surface of the urinal and the urinal is an antifouling surface different from the present invention. In addition to the ball surface, specifically, it is preferable that the glaze layer having the above-mentioned surface property is formed on the collar part, the rim upper surface, the tank body part, the tank lid part, and the like.

Glaze for generating a glaze layer according to glaze the present invention, as long as the above-described surface properties can be achieved, the composition is not limited. In the present invention, the glaze raw material is generally defined as a mixture of natural mineral particles such as silica sand, feldspar, limestone and the like. Examples of the pigment include a cobalt compound and an iron compound, and examples of the emulsion include zirconium silicate and tin oxide. Amorphous glaze refers to a glaze obtained by melting a glaze raw material composed of a mixture of natural mineral particles as described above at a high temperature and then rapidly cooling to vitrification. For example, a frit glaze can be suitably used. .

  According to a preferred embodiment of the present invention, preferred glaze compositions include, for example, feldspar 10 wt% to 30 wt%, silica sand 15 wt% to 40 wt%, calcium carbonate 10 wt% to 25 wt%, corundum, talc, dolomite, zinc white 10 wt% or less each, and the total amount of the emulsion and the pigment is 15 wt% or less.

Sanitary ware base The sanitary ware base of the sanitary ware according to the present invention is not particularly limited, and may be a normal sanitary ware base. Moreover, the glaze layer used as an intermediate | middle layer may be provided under the glaze layer which has the said surface property of the outermost layer.

Manufacturing Method The sanitary ware according to the present invention can be preferably manufactured by the following method. That is, first, a sanitary ware body slurry prepared from quartz sand, feldspar, clay, or the like as a raw material is formed into an appropriate shape by casting using a water-absorbing mold. Thereafter, the glaze raw material is applied to the dried surface of the molded article by appropriately selecting a general method such as spray coating, dip coating, spin coating or roll coating. Next, the obtained molded body on which the precursor layer of the surface glaze layer is formed is fired. The firing temperature is preferably a temperature of 1,000 ° C. or more and 1,300 ° C. or less at which the ceramic body is sintered and the glaze is softened.

The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples.

Examples 1-14
2 kg of natural mineral particles having the composition shown in Table 1 below, 1 kg of water, and 4 kg of cobblestone were placed in a 6 liter earthenware pot and ground by a ball mill for about 24 hours to obtain a glaze slurry. Next, a plate test piece of 70 × 70 mm was prepared using sanitary ware base slurry prepared using silica sand, feldspar, clay and the like as raw materials. On this plate-shaped test piece, the glaze was apply | coated so that it might become thickness 0.5mm by the spray coating by the wet-blow method, and the sample was obtained by baking at 1100-1200 degreeC after that. As described above, to give an example of a sanitary ware 1 to 1 2.

In addition, as Example 1, 3, glaze of sanitary ware, which is commercially available (manufactured by color part number # N11, TOTO Co., Ltd.), sanitary ware, which has been commercially available in the past as Example 1 4 (color part number # N5M, manufactured by TOTO Ltd.) utilizing, prepared same plate specimen as example 1 and 1 2, and the examples 1 3 and 1 4 of sanitary ware.

For Rc and RSm measured <br/> Example 1 to 1 4 samples, JIS B0601 in accordance with the definition and the display according to (2001), JIS B0601 (1996 years) stylus type surface roughness measuring device conforming to (LTD Measured by Mitutoyo SV-624).

Samples of glossiness measurement examples 1 to 1 4, the 60 ° gloss on the basis of JIS Z8741, was measured by a gloss meter (Konica Minolta GM-268).

The antifouling following methods evaluation was evaluated antifouling the surface of Example 1 to 1 4.
(1) The a * of the sample surface was measured with a color difference meter, and the value was defined as a0 *. Including the following, when measuring a *, a white mask with a width of 5 mm was placed on the line to prevent measurement variation due to bleeding.
(2) A 3 mm wide line was written on the sample with a red creeper, a * on the line was measured with a color difference meter, and the value was set to a1 *.
(3) Using a commercially available toilet cleaning sheet (trade name: Toilet Quickle), 30 reciprocations were wiped off with a load of 25 g / cm ² applied in a direction perpendicular to the line.
(4) The color of the sample after the sliding was measured with a color difference meter, and the value was defined as a2 *.
(5) The soil removability was calculated from the following equation.
Dirt removal property (%) = (a1 * −a2 *) / (a1 * −a0 *)
A stain removability of 90% or more can be judged to be good.

Results The results above were as shown in Table 2 below.

Claims (7)

The surface property of the glaze layer formed on the outermost surface is such that the average height (Rc) specified by JIS B0601 (2001) is 0.5 μm or more and 2.5 μm or less, and the average height (Rc) is mean divided by the length (RSm) value (Rc / RSm) is Ri Oh at greater than 9 × ^{10 -3,} and wherein the Oh Rukoto in less than 16 × ^{10 -3,} sanitary ware. The sanitary ware according to claim 1, wherein the Rc / RSm is greater than 10 × 10 ⁻³ . The sanitary ware according to claim 1, wherein the glaze layer has a 60 ° glossiness of 40 or less.   The sanitary ware according to claim 1, wherein crystal particles precipitated in the firing step are scattered on the surface of the glaze layer.   The sanitary ware according to claim 1, wherein the glaze layer includes crystal particles, and a volume ratio of the crystal particles in the glaze layer is 20 vol% to 30 vol%.   The sanitary ware according to claim 4 or 5, wherein the crystal particles are crystals of a compound of a divalent alkaline earth element. It said crystal is a Jiopusaido (CaO-MgO-2SiO ₂₎ or anorthite _{(CaO-Al 2 O 3 -SiO} 2), sanitary ware according to claim 6.