Polishing-free simulated stone ceramic tile and preparation method thereof

Abstract

The invention belongs to the field of polishing-free ceramic tiles, and particularly discloses a polishing-free simulated stone ceramic tile and a preparation method thereof. The throwing-free simulated stone ceramic tile sequentially comprises a green body layer, a cover glaze layer, a printing layer, a functional ink layer and a skin feeling glaze layer from bottom to top, the skin-feeling glaze layer is formed by slurry containing skin-feeling glaze with specific composition, and the functional ink layer is formed by combining functional ink with a three-dimensional composition method; the cover glaze layer is formed from a slurry comprising a cover glaze of a specific composition. The ceramic tile prepared by the invention has the natural crack effect of stone, and also has better antifouling property and wear resistance, the tile surface is fine and smooth, the defects of fine miliaria, pores and the like do not exist, the glossiness is 10-20 degrees, and the glaze surface is fine, smooth, mild and moist like the skin of a human body.

Description

Technical Field

[0001] The invention belongs to the field of non-polishing ceramic tiles, and particularly relates to a non-polishing simulated stone ceramic tile and a preparation method thereof. Background Art

[0002] With the increasing improvement of living standards, the younger generation is increasingly fond of soft-gloss products, and the industry's products are constantly innovating and upgrading. In addition, the impact of industry transparency has led to the appearance of ceramic products being basically the same. In recent years, in addition to continuing to increase the number of colors and glaze effects, researchers have also continuously developed new types of glazes for architectural decoration. The fine-surface ceramic tiles on the market are roughly divided into soft-gloss series and soft-polished tile series. Soft-polished tiles achieve a delicate gloss and soft effect through post-processing methods such as polishing and waxing. However, the surface structure of the glaze is removed by brushing the module, and then waxing is used to achieve the soft surface effect. In the later use, as the wax wears off, the gloss and anti-fouling performance of the tile surface will be greatly reduced. In addition, the gloss of the glaze surface is generally between high gloss and matte. Soft light tiles are not polished but achieve a delicate effect through the formulation of glaze. However, the fine problems such as fine prickly heat, pores, wear resistance and anti-slip on the delicate tile surface produced by this process have always been a common problem in the industry, which will affect the later use effect of the product to varying degrees. In addition, due to the good melting point and low temperature characteristics of the glaze in the delicate tile surface, it is also difficult for the corresponding products to achieve the natural crack effect of stone, and the corresponding simulated stone products are very rare.

[0003] Therefore, in order to meet market demand and change the current status of the industry, it is necessary to develop new types of light-sensitive tiles with a glazed texture that are different from the existing ceramic tile glaze effects. Summary of the Invention

[0004] The present invention aims to address the deficiencies of the prior art. In this regard, a first aspect of the present invention provides a non-polished simulated stone tile, comprising, from bottom to top, a body layer, a top glaze layer, a print layer, a functional ink layer, and a skin-feeling glaze layer; the skin-feeling glaze layer is formed from a first slurry comprising skin-feeling glaze and water, the functional ink layer is formed from functional ink; the top glaze layer is formed from a second slurry comprising top glaze and water;

[0005] The raw materials of the skin-feeling glaze include, by weight: 8-15 parts of potassium feldspar, 10-20 parts of sodium feldspar, 8-15 parts of washed clay, 4-10 parts of calcined kaolin, 2-5 parts of barium carbonate, 5-15 parts of calcite, 1-8 parts of calcined zinc oxide, 0.1-0.5 parts of aluminum dihydrogen phosphate, 10-25 parts of high-calcium aluminum frit, 15-25 parts of skin-feeling frit, 2-5 parts of corundum and 3-8 parts of burned talc;

[0006] The high calcium aluminum frit comprises, by weight percentage: K2O 1.11%-2.50%, SiO2 45.12%-48.15%, Al2O3 24.02%-26.12%, CaO 18.88%-21.15%, Na2O 0.51%-1.24%, MgO 4.81%-6.83%;

[0007] The skin-feel frit comprises, by weight percentage, K2O 4.31%-6.50%, SiO2 52.12%-56.15%, Al2O3 18.02%-20.12%, CaO 7.88%-9.15%, Na2O 1.51%-2.64%, MgO 1.81%-2.83%, ZnO 2.33%-3.91%, and SrO 5.33%-6.91%.

[0008] The functional inks include matte engraving inks and peeling inks;

[0009] The raw materials of the glaze include, by weight, 15-22 parts of potassium feldspar, 5-10 parts of air knife clay, 15-25 parts of sodium feldspar, 10-20 parts of nepheline powder, 3-10 parts of wollastonite powder, 5-15 parts of high white alumina, 12-18 parts of quartz powder, 10-15 parts of zirconium silicate, 2-5 parts of zinc oxide, and 10-20 parts of boron-containing frit.

[0010] The present invention adopts skin-feeling glaze and top glaze composed of specific formulas, and cooperates with functional ink applied by using a simulated stone effect network formed by a three-dimensional composition method to produce a simulated stone tile with natural crack effects of stone, good anti-fouling performance, good wear resistance, a fine and smooth brick surface, and no defects such as fine prickly heat and pores. The glossiness is between 10-20 degrees, and the glaze surface is delicate and smooth like human skin. Specifically, the present invention first uses the physical ink discharge characteristics of functional inks including matte carving ink and peeling ink based on a specific formula of glaze, and draws on the three-dimensional composition method to form a spider web-like surface effect structure with natural stone, which not only achieves the three-dimensional effect of the texture of simulated stone, but also solves the problem of glaze exhaust, thereby reducing the generation of prickly heat and pores; and based on this, a skin-feeling glaze with high transparency and suitable high-temperature viscosity of zinc strontium is proposed, which can use the tiny grains in the glaze layer to ensure that the glaze layer has good high-temperature resistance to thermoplastic deformation at high temperatures, thereby better maintaining the carving effect produced by the functional ink; in addition, the introduction of skin-feeling glaze with a high frit ratio can effectively reduce the problem of burn-out of raw materials, thereby reducing the problems of prickly heat, pinholes, etc. caused by poor exhaust caused by large burn-out during the later high-temperature firing; the high content of calcium and aluminum in the skin-feeling glaze can further increase the skeleton component of the glaze layer, thereby enhancing the strength of the glaze surface and reducing the glossiness of the glaze surface, and improving the wear resistance of the tiles. In addition, the introduction of skin-feeling glaze with a high frit ratio can effectively reduce the problem of burn-out of raw materials, thereby reducing the problems of prickly heat, pinholes, etc. caused by poor exhaust caused by large burn-out during the later high-temperature firing; the high content of calcium and aluminum in the skin-feeling glaze can further increase the skeleton component of the glaze layer, thereby enhancing the strength of the glaze surface and reducing the glossiness of the glaze surface, and improving the wear resistance of the tiles. The introduction of a high-density silicon-aluminum ratio can effectively establish the skin-feeling glaze under high-temperature firing for high-temperature shaping and fine carving, and the three-dimensional effect is strong. At the same time, the introduction of zinc oxide components can optimize the high-temperature viscosity of the glaze layer, effectively improve the delicate feeling of the glaze surface, and the color and transparency of the glaze layer will be greatly improved. At the same time, the introduction of high-calcium aluminum frit mainly forms an anorthite crystal phase after high-temperature firing. The anorthite content can adjust the fluidity of the high-temperature protective glaze layer. At the same time, the higher fluxing component and lower impurity component can ensure that the skin-feeling glaze layer has higher transparency and reactivity, ensuring the color effect and three-dimensional fine carving texture of the product pattern. The skin-feeling glaze of the present invention also introduces aluminum dihydrogen phosphate, which effectively reduces the sintering temperature of the ceramic, enhances the hardness and compressive strength of the ceramic surface, and can also optimize the microstructure of the ceramic, making it denser, reducing the occurrence of problems such as pores and orange peel, and can also reduce the water absorption and shrinkage of the ceramic, thereby improving the wear resistance and chemical corrosion resistance of the glaze while improving the moist feeling of the glaze. The point-line-surface combination effect formed between the surface glaze, functional ink and skin-feel glaze enables the ceramic tile of the present invention to achieve good wear resistance and anti-slip effect as well as anti-fouling, air exhaust and flatness problems without polishing.

[0011] Among them, the above-mentioned skin-feel glaze includes, by weight percentage: K2O 1.51%-3.50%, SiO2 47.12%-52.15%, Al2O3 19.02%-22.12%, CaO 8.88%-11.15%, SrO 1.52%-2.63%, Na2O1.51%-3.24%, ZnO2.33%-4.51%, MgO 2.21%-4.13%, and BaO 3.42%-5.63%.

[0012] In some preferred embodiments, the boron-containing frit comprises, by weight, 4.31%-5.50% K2O, 50.12%-53.15% SiO2, 10.02%-12.12% Al2O3, 9.18%-11.15% CaO, 1.01%-1.84% Na2O, 0.81%-1.53% MgO, 3.83%-5.91% ZnO, 10.13%-13.48% BaO, and 5.33%-6.91% B2O3. Boron-containing frit can lower the onset temperature and high-temperature viscosity, inhibit the crystallization tendency of other compounds, and reduce the coefficient of expansion.

[0013] The above-mentioned glaze includes, by weight percentage: SiO2 53.23%-58.86%, Al2O3 20.12%-25.15%, CaO2.63%-4.65%, ZrO2 6.15%-8.86%, ZnO 1.62%-4.51%, BaO 0.51%-1.22%, Na2O3.15%-4.54%, K2O 1.91%-3.50%, MgO 0.21%-1.03%, and B2O3 1.33%-2.91%.

[0014] In some preferred embodiments, the first slurry further comprises a disintegrating agent. The second slurry further comprises sodium methylcellulose and sodium tripolyphosphate. The first slurry is prepared by mixing the raw materials for the skin-feel glaze with water, ball-milling the mixture, and then adding the disintegrating agent and mixing to obtain the first slurry. The second slurry is prepared by mixing the raw materials for the top glaze, water, sodium methylcellulose, and sodium tripolyphosphate, ball-milling the mixture to obtain the second slurry.

[0015] A second aspect of the present invention provides a method for preparing the above-mentioned non-polishing simulated stone tiles, comprising the following steps:

[0016] The second slurry is applied to the surface of the green body layer, and then printed, followed by printing the functional ink, and then the first slurry is applied by electrostatic method, and fired to obtain the non-polishing simulated stone tile.

[0017] The first slurry comprises the skin-feeling glaze, water and a disintegrator. The specific gravity of the first slurry is 1.45 g / mL-1.55 g / mL and the applied amount is 450 g / m 3 -470 g / m 3 ; And the electrostatic method is used for spraying glaze, which makes the glaze surface smoother. It is preferred to use a swing-arm electrostatic glaze spraying device. The angle of the nozzle used by the electrostatic swing-arm glaze spraying is 180 degrees, which is larger than the traditional nozzle and has a wider glaze spraying area. In addition, the spray gun of the swing-arm glaze spraying cabinet adopts a cross-type multi-track circulating glaze spraying, which can spray the brick surface without dead angles, and the glaze spraying effect is smoother and more uniform. The above-mentioned second slurry includes the above-mentioned glaze, water, sodium methyl cellulose and sodium tripolyphosphate. The specific gravity of the above-mentioned second slurry is 1.88g / mL-1.92g / mL, and the application amount is 470g / m 3 -490 g / m 3 , the flow rate is 33s / 100mL-38s / 100mL.

[0018] In some preferred implementations, when printing the functional ink, the printed lines have a diameter of 0.5mm-2.3mm. After firing, a peeling depth of 0.1mm-0.3mm is achieved. When the line diameter is less than the minimum value, the tile's simulated stone effect is less pronounced. When the line diameter is greater than the maximum value, the peeling effect is rough and the peeling depth is too great, which can easily lead to problems such as glaze accumulation and ink discharge. Furthermore, drawing on the three-dimensional composition method, the functional ink prints lines in a spiderweb-like pattern.

[0019] The firing temperature is 1180-1210° C. and the firing time is 45-50 minutes. In some cases, after the firing, the edges are ground to obtain the non-polishing simulated stone tiles.

[0020] The beneficial effects of the present invention are as follows: the ceramic tiles produced by the present invention have the natural crack effect of stone, and at the same time have good anti-fouling and wear-resistant properties. The tile surface is fine and smooth and does not have defects such as fine prickly heat and pores. Its glossiness is between 10-20 degrees, and the glaze surface is fine and smooth like human skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is the XRD diffraction pattern of the skin-feel glaze after high-temperature firing in Example 1;

[0022] Figure 2 The figure shows the effect of the electrostatic swing arm spray glaze brick in Example 2;

[0023] Figure 3 Shown is a physical picture of the tile obtained in Comparative Example 7;

[0024] Figure 4 Shown is a physical picture of the tile obtained in Comparative Example 5;

[0025] Figure 5 The picture shows the effect of simulated stone brick surface made by traditional smooth glaze;

[0026] Figure 6 Shown is a physical picture of the ceramic tile obtained in Example 1;

[0027] Figure 7 Shown is a physical picture of the ceramic tile obtained in Comparative Example 4. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments and drawings to clearly and completely describe the concept and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0029] Example 1

[0030] A non-polishing simulated stone tile comprises, from bottom to top, a body layer, a surface glaze layer, a printing layer, a functional ink layer and a skin-feeling glaze layer.

[0031] The skin-feeling glaze layer is formed by a first slurry, which includes skin-feeling glaze, water and TMS disintegrator;

[0032] The raw materials of the skin-feeling glaze include, by weight: 8 parts of potassium feldspar, 17 parts of sodium feldspar, 10 parts of washed clay, 6 parts of calcined kaolin, 4 parts of barium carbonate, 8 parts of calcite, 4 parts of calcined zinc oxide, 0.2 parts of aluminum dihydrogen phosphate, 25 parts of high calcium aluminum frit, 24 parts of skin-feeling frit, 2 parts of corundum and 4 parts of burned talc;

[0033] The high calcium aluminum frit includes, by weight percentage: K2O 1.48%, SiO2 46.74%, Al2O3 24.59%, CaO19.31%, Na2O 0.74%, MgO 5.73%;

[0034] The skin-feel frit includes, by weight percentage, K2O 5.32%, SiO2 54.16%, Al2O3 18.59%, CaO 8.52%, Na2O 1.68%, MgO 2.19%, ZnO 2.97%, and SrO 5.73%.

[0035] The preparation method of the first slurry includes the following steps: mixing the raw materials of the above-mentioned skin-feel glaze with water and then ball-milling, and a 325-mesh sieve has a residue of 0.6%, and then adding water to adjust the specific gravity to 1.50 g / mL, and then adding TMS disintegrator at a mass ratio of 1:500 to obtain the first slurry.

[0036] The functional ink layer is formed by functional ink; the functional ink includes matte engraving ink (Mairis Code: 131-8) and peeling ink (CIK-DP1130);

[0037] The glaze layer is formed by a second slurry; the second slurry includes glaze, water, sodium methylcellulose and sodium tripolyphosphate;

[0038] The raw materials of the glaze include, by weight: 18 parts of potassium feldspar, 6 parts of air knife clay, 20 parts of sodium feldspar, 15 parts of nepheline powder, 4 parts of wollastonite powder, 10 parts of high white alumina, 14 parts of quartz powder, 13 parts of zirconium silicate, 3 parts of zinc oxide, and 10 parts of boron-containing frit;

[0039] The boron-containing frit includes, by weight percentage, K2O 4.70%, SiO2 50.85%, Al2O3 10.22%, CaO 10.11%, Na2O 1.22%, MgO 1.15%, ZnO 4.79%, B2O3 5.89%, and BaO 10.13%.

[0040] The preparation method of the second slurry includes the following steps: mixing the above-mentioned glaze raw materials, 0.2 parts of sodium tripolyphosphate, 0.1 parts of sodium methyl cellulose and water and ball milling, with a 325-mesh sieve residue of 0.8%, and then adding water to adjust the specific gravity to 1.89 g / mL to obtain the above-mentioned second slurry.

[0041] The preparation method of the above-mentioned non-polishing simulated stone tiles comprises the following steps:

[0042] (1) Apply the second slurry on the surface of the green body layer; the specific gravity of the second slurry is 1.89 g / mL, and the application amount is 480 g / m 3 , flow rate is 35s / 100mL;

[0043] (2) Printing;

[0044] (3) Printing functional ink: Using the three-dimensional composition method to print spider web-like lines, the line diameter of the printed lines is 0.5mm-2.3mm (varied within this range to enhance the natural feeling);

[0045] (4) Apply the first slurry using an electrostatic rocker-type glaze spraying device; the specific gravity of the first slurry is 1.45 g / mL, and the application amount is 450 g / m 3 ;

[0046] (5) Firing (temperature: 1185°C, time: 45 min), grinding the edges, and obtaining the above-mentioned non-polishing simulated stone tiles.

[0047] Example 2

[0048] A non-polishing simulated stone tile, which differs from Example 1 in that:

[0049] The raw materials for the top glaze, by weight, include: 15 parts potassium feldspar, 7 parts air knife clay, 20 parts sodium feldspar, 15 parts nepheline powder, 8 parts wollastonite powder, 10 parts high white alumina, 12 parts quartz powder, 13 parts zirconium silicate, 3 parts zinc oxide, and 10 parts boron-containing frit. Other ingredients are the same as in Example 1.

[0050] Example 3

[0051] A non-polishing simulated stone tile, which differs from Example 1 in that:

[0052] The raw materials for the top glaze, by weight, include: 22 parts potassium feldspar, 7 parts air knife clay, 18 parts sodium feldspar, 10 parts nepheline powder, 8 parts wollastonite powder, 10 parts high-white alumina, 12 parts quartz powder, 13 parts zirconium silicate, 3 parts zinc oxide, and 10 parts boron-containing frit. Other ingredients are the same as in Example 1.

[0053] Example 4

[0054] A non-polishing simulated stone tile, which differs from Example 1 in that:

[0055] The raw materials for the skin-feel glaze, by weight, include: 8 parts potassium feldspar, 17 parts sodium feldspar, 8 parts water-washed clay, 6 parts calcined kaolin, 4 parts barium carbonate, 8 parts calcite, 4 parts calcined zinc oxide, 0.5 parts aluminum dihydrogen phosphate, 23 parts high-calcium aluminum frit, 24 parts skin-feel frit, 2 parts corundum, and 6 parts calcined talc. Other ingredients are the same as in Example 1.

[0056] Example 5

[0057] A non-polishing simulated stone tile, which differs from Example 1 in that:

[0058] The raw materials for the skin-feel glaze, by weight, include: 15 parts potassium feldspar, 10 parts sodium feldspar, 8 parts water-washed clay, 8 parts calcined kaolin, 4 parts barium carbonate, 8 parts calcite, 5 parts calcined zinc oxide, 0.2 parts aluminum dihydrogen phosphate, 20 parts high-calcium aluminum frit, 25 parts skin-feel frit, 3 parts corundum, and 6 parts calcined talc. Other ingredients are the same as in Example 1.

[0059] Example 6

[0060] A non-polishing simulated stone tile, which differs from Example 1 in that:

[0061] The raw materials for the skin-feel glaze, by weight, include: 10 parts potassium feldspar, 15 parts sodium feldspar, 10 parts water-washed clay, 8 parts calcined kaolin, 5 parts barium carbonate, 8 parts calcite, 4 parts calcined zinc oxide, 0.2 parts aluminum dihydrogen phosphate, 17 parts high-calcium aluminum frit, 25 parts skin-feel frit, 3 parts corundum, and 4 parts calcined talc. Other ingredients are the same as in Example 1.

[0062] Comparative Example 1

[0063] A ceramic tile, which differs from Example 1 in that:

[0064] The raw materials for the glaze include, by weight, 20 parts of calcined kaolin, 8 parts of ball clay, 5 parts of calcined alumina, 16 parts of quartz, 17.5 parts of potassium feldspar, 16 parts of sodium feldspar, 14.5 parts of nepheline powder, and 3 parts of zinc oxide. Other ingredients are the same as in Example 1.

[0065] Comparative Example 2

[0066] A ceramic tile, which differs from Example 1 in that:

[0067] The raw materials for the glaze include, by weight, 21.5 parts of calcined kaolin, 6.5 parts of ball clay, 13 parts of quartz, 20 parts of potassium feldspar, 13 parts of sodium feldspar, 7 parts of barium carbonate, 6 parts of zinc oxide, and 13 parts of nepheline powder. Other ingredients are the same as in Example 1.

[0068] Comparative Example 3

[0069] A ceramic tile, which differs from Example 1 in that:

[0070] The raw materials of the skin-feeling glaze include, by weight: 25 parts of albite, 6 parts of calcined kaolin, 6 parts of calcined zinc oxide, 6 parts of barium carbonate, 20 parts of high-calcium aluminum frit, 25 parts of crystal frit, 10 parts of washed soil, 4 parts of burned talc, and 8 parts of calcite;

[0071] The crystal frit comprises, by mass percentage, 8.11% K2O, 58.65% SiO2, 9.49% Al2O3, 12.18% CaO, 0.54% Na2O, 0.81% MgO, and 9.83% ZnO. Other components are the same as those in Example 1.

[0072] Comparative Example 4

[0073] A ceramic tile, which differs from Example 1 in that:

[0074] The raw materials of the skin-feeling glaze include, by weight, 25 parts of potassium feldspar, 8 parts of calcined kaolin, 5 parts of calcined zinc oxide, 4 parts of barium carbonate, 8 parts of quartz, 33 parts of skin-feeling frit, 8 parts of washed clay, 5 parts of calcined talc, and 14 parts of calcite. Other ingredients are the same as those in Example 1.

[0075] Comparative Example 5

[0076] A ceramic tile, which differs from Example 1 in that:

[0077] The raw materials for the skin-feeling glaze, by weight, include: 30 parts potassium feldspar, 8 parts calcined kaolin, 5 parts calcined zinc oxide, 6 parts barium carbonate, 26 parts skin-feeling frit, 10 parts washed clay, 5 parts calcined talc, 14 parts calcite, 3 parts calcined alumina, and 3 parts corundum. Other ingredients are the same as in Example 1.

[0078] Comparative Example 6

[0079] A ceramic tile, which differs from Example 1 in that:

[0080] The raw materials for the skin-feeling glaze include, by weight, 35 parts of albite, 8 parts of calcined kaolin, 2 parts of calcined zinc oxide, 4 parts of barium carbonate, 33 parts of skin-feeling frit, 10 parts of washed clay, 4 parts of calcined talc, 12 parts of calcite, and 2 parts of corundum. Other ingredients are the same as in Example 1.

[0081] Comparative Example 7

[0082] A ceramic tile, which differs from Example 1 in that:

[0083] The raw materials of the skin-feeling glaze include, by weight: 25 parts of albite, 6 parts of calcined kaolin, 6 parts of calcined zinc oxide, 6 parts of barium carbonate, 20 parts of quartz, 25 parts of crystal frit, 10 parts of washed clay, 4 parts of burned talc, and 8 parts of calcite;

[0084] The crystal frit comprises, by mass percentage, 8.11% K2O, 58.65% SiO2, 9.49% Al2O3, 12.18% CaO, 0.54% Na2O, 0.81% MgO, and 9.83% ZnO. Other components are the same as those in Example 1.

[0085] Comparative Example 8

[0086] A ceramic tile, which differs from Example 1 in that:

[0087] In step (4), the first slurry was applied using a conventional glaze spraying device (Xinjingtai reciprocating glaze spraying machine, model WP-2350L5-6B6) instead of an electrostatic rocker glaze spraying device (Powerland, model PL-JDPT900-1). Other steps were the same as in Example 1.

[0088] The chemical compositions of the skin-feel glazes of Example 1, Examples 4-6, and Comparative Examples 3-7 are shown in Table 1 (all units are %).

[0089] Table 1

[0090]

[0091] The chemical compositions of the glazes of Examples 1-3 and Comparative Examples 1-2 are shown in Table 2 (all units are %).

[0092] Table 2

[0093] <![CDATA[SiO2]]> <![CDATA[Al2O3]]> <![CDATA[ZrO2]]> <![CDATA[K2O]]> <![CDATA[Na2O]]> MgO CaO ZnO BaO <![CDATA[B2O3]]> Example 1 55.81 21.38 7.61 2.58 3.63 0.28 2.85 2.12 1.14 1.54 Example 2 53.75 21.45 7.61 2.48 3.41 0.35 3.23 3.50 1.15 1.43 Example 3 54.39 20.34 7.23 3.07 3.24 0.34 3.15 3.50 1.19 1.53 Comparative Example 1 58.36 25.35 0.28 2.47 3.26 0.16 1.14 2.16 3.12 0.12 Comparative Example 2 53.97 24.23 0.12 2.78 2.69 0.23 0.86 5.75 5.69 0.12

[0094] Performance Testing

[0095] (1) The stain resistance and wear resistance of the tiles prepared in Examples 1-6 and Comparative Examples 1-8 were tested. The results are shown in Table 3.

[0096] Table 3

[0097]

[0098]

[0099] (2) Appearance test

[0100] Confirm whether the tile surface is flat (using a mirror surface as a reference), observe whether there are defects such as orange peel, prickly heat, glaze shrinkage, etc., and whether the gloss of the surface is uniform. The test results are shown in Table 4.

[0101] Table 4

[0102] product Gloss (°) Touch Evaluation & Rating Appearance Example 1 14 Delicate and warm, 10 points Smooth, no appearance defects Example 2 16.5 Delicate and warm, 10 points Smooth, no appearance defects Example 3 17.5 Delicate and warm, 9.5 points Smooth, no appearance defects Example 4 18 Delicate and warm, 10 points Smooth, no appearance defects Example 5 16 Delicate and warm, 10 points Smooth, no appearance defects Example 6 17.5 Delicate and warm, 9.5 points Smooth, no appearance defects Comparative Example 1 9 Rough, 7 points A small amount of unevenness, prickly heat defects Comparative Example 2 10 Rough, 7 points A small amount of unevenness, prickly heat defects Comparative Example 3 9 Rough, 5 points Uneven, many prickly heat defects Comparative Example 4 19.5 Smooth, 6 points Uneven, many prickly heat defects Comparative Example 5 12 Rough, 7 points Smooth, no appearance defects, uneven gloss Comparative Example 6 25 Smooth, 6 points Uneven, with orange peel defects Comparative Example 7 19 Smooth, 6 points Uneven, with prickly heat defects Comparative Example 8 20 Smooth, 6 points Uneven, with orange peel defects

[0103] from Figure 2 and Figure 3 It can be seen that the electrostatic glaze spraying process uses the ionization principle to spray the charged protective glaze onto the surface of the brick. The high-speed swing-arm glazing can better solve the problems of uneven glazing and high specific gravity and high grammage. After firing, the brick surface is delicate and smooth without defects such as orange peel and pores. The traditional glaze spraying cabinet has a limited glaze spraying angle and has certain limitations for the process of high specific gravity and high glaze grammage. The glazed brick surface has large crystals and poor flatness, and is obviously prone to orange peel and fine glaze pinholes. Figure 4 This is the brick surface effect diagram of comparative example 5. It can be seen from the figure that the brick surface is relatively smooth but the glossiness is low, the glaze feels a bit rough and the glossiness is uneven. Figure 5 This is a rendering of a traditional delicate marble tile surface. From the picture, we can see that due to the insufficient skeleton component of the glaze, the texture position is peeled off and then fired at high temperature to melt the glaze, resulting in a bloated three-dimensional effect and a lack of refinement. Figure 6 This is the fired product of Example 1. From the picture, we can see that the glaze is warm and smooth, the three-dimensional effect is fine, and it highly imitates the texture of natural marble, which enhances the high-end feel of the tile. Figure 7 Under the light, it's clear that while the glaze surface is smooth and fine, it does have minor defects like concave glaze and prickly heat. The low Al₂O₃ content in Comparative Example 3 results in a lower melting temperature for the glaze, which easily produces pinhole prickly heat defects. The high quartz content and low Al₂O₃ content in Comparative Example 7 result in a low melting temperature during firing and increased viscosity at high temperatures, resulting in a high number of pinhole prickly heat defects.

[0104] It can be seen from Table 4 that the glossiness and surface effects of the tiles of the present invention are excellent, while the glazes of traditional processes and modified formulas have more or less small defects. Glazes with high glossiness are prone to problems such as orange peel and pinholes, while glazes with low glossiness may not be warm enough and the glaze surface may be rough.

[0105] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the above-described embodiments. As long as the technical effects of the present invention are achieved by the same means, they shall fall within the scope of protection of the present invention. Within the scope of protection of the present invention, various modifications and variations of the technical solutions and / or implementation methods may be made.

Claims

1. A non-polishing imitation stone tile, characterized in that: The invention comprises, from bottom to top, a body layer, a top glaze layer, a printing layer, a functional ink layer and a skin-feeling glaze layer; the skin-feeling glaze layer is formed of a first slurry comprising skin-feeling glaze and water, the functional ink layer is formed of functional ink; the top glaze layer is formed of a second slurry comprising top glaze and water; The raw materials of the skin-feeling glaze include, by weight: 8-15 parts of potassium feldspar, 10-20 parts of sodium feldspar, 8-15 parts of washed clay, 4-10 parts of calcined kaolin, 2-5 parts of barium carbonate, 5-15 parts of calcite, 1-8 parts of calcined zinc oxide, 0.1-0.5 parts of aluminum dihydrogen phosphate, 10-25 parts of high-calcium aluminum frit, 15-25 parts of skin-feeling frit, 2-5 parts of corundum and 3-8 parts of burned talc; The high calcium aluminum frit comprises, by weight percentage: K2O 1.11%-2.50%, SiO2 45.12%-48.15%, Al2O3 24.02%-26.12%, CaO 18.88%-21.15%, Na2O 0.51%-1.24%, MgO 4.81%-6.83%; The skin-feel frit comprises, by weight percentage, K2O 4.31%-6.50%, SiO2 52.12%-56.15%, Al2O3 18.02%-20.12%, CaO 7.88%-9.15%, Na2O 1.51%-2.64%, MgO 1.81%-2.83%, ZnO 2.33%-3.91%, and SrO 5.33%-6.91%. The functional inks include matte engraving inks and peeling inks; The raw materials of the glaze include, by weight, 15-22 parts of potassium feldspar, 5-10 parts of air knife clay, 15-25 parts of sodium feldspar, 10-20 parts of nepheline powder, 3-10 parts of wollastonite powder, 5-15 parts of high white alumina, 12-18 parts of quartz powder, 10-15 parts of zirconium silicate, 2-5 parts of zinc oxide, and 10-20 parts of boron-containing frit.

2. The non-polishing imitation stone tile according to claim 1, characterized in that: The boron-containing frit comprises, by weight percentage, 4.31%-5.50% of K2O, 50.12%-53.15% of SiO2, 10.02%-12.12% of Al2O3, 9.18%-11.15% of CaO, 1.01%-1.84% of Na2O, 0.81%-1.53% of MgO, 3.83%-5.91% of ZnO, 10.13%-13.48% of BaO, and 5.33%-6.91% of B2O3.

3. The non-polishing simulated stone tile according to claim 1, characterized in that: The first slurry further includes a disintegrator.

4. The non-polishing simulated stone tile according to claim 1, characterized in that: The second slurry further comprises sodium methylcellulose and sodium tripolyphosphate.

5. A method for preparing the non-polishing simulated stone tile according to any one of claims 1 to 4, characterized in that: The following steps are involved: The second slurry is applied on the surface of the green body layer, and then printing is performed, followed by printing the functional ink, and then the first slurry is applied by electrostatic method, and fired to obtain the non-polishing simulated stone tile.

6. The preparation method according to claim 5, characterized in that The first slurry includes the skin-feeling glaze, water and a disintegrator. The specific gravity of the first slurry is 1.45 g / mL-1.55 g / mL and the application amount is 450 g / m 3 -470 g / m 3 .

7. The preparation method according to claim 5, characterized in that The second slurry includes the glaze, water, sodium methylcellulose and sodium tripolyphosphate, the specific gravity of the second slurry is 1.88g / mL-1.92g / mL, and the application amount is 470g / m 3 -490g / m 3 , the flow rate is 33s / 100mL-38s / 100mL.

8. The preparation method according to claim 5, characterized in that When printing the functional ink, the diameter of the printed lines is 0.5 mm to 2.3 mm.

9. The preparation method according to claim 5, characterized in that The firing temperature is 1180° C.-1210° C., and the firing time is 45 min-50 min.

10. The preparation method according to claim 5, characterized in that After the firing is completed, the edges are ground to obtain the non-polishing simulated stone tiles.

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