A high grayscale solid color brick inkjet process

Abstract

The present invention relates to the field of building materials and specifically discloses a high-grayscale plain brick inkjet process. The process comprises the following steps: S1, applying a base glaze to the surface of the brick and firing; S2, spraying a color paste on the base glaze and firing; S3, applying ink of the same color as the color paste to the surface of the color paste by screen printing to form a base color; S4, spraying ink on the brick surface using a digital inkjet; S5, firing; the specific gravity of the color paste is 2.20-2.30 g / cm 3 The color paste has a particle size of 1.5-2.5 μm and a solid content of 74.5-75.5%. By sequentially applying a base glaze, color paste, base color, and inkjet printing to the surface of the green body, the grayscale of the plain brick surface is reduced, preventing the color development of the plain brick surface caused by nozzle stringing during inkjet printing, thereby improving the quality of the plain brick. The color paste, as a base color, can neutralize the original color of the green body and improve the color development of the plain brick. Inkjet printing on the color paste can effectively reduce the grayscale of the plain brick and avoid the uneven color development of the plain brick surface caused by nozzle stringing during inkjet printing.

Description

Technical Field

[0001] The invention relates to the field of building materials, and in particular to an inkjet process for high-grayscale solid-color bricks. Background Art

[0002] At present, people pay more attention to quality requirements when decorating their homes. Most people will choose plain bricks. Plain bricks are favored by consumers for their simple, bright, comfortable, intellectual and elegant decorative effects and superior performance.

[0003] In the relevant technology, plain bricks refer to a type of ceramic tile products with black, white and gray as the main colors. They pay attention to plain color aesthetics, not only focusing on texture, but also on grayscale, light sensitivity, anti-slip, touch and other aspects. Plain bricks are made by spraying black, white or gray color paste on the surface of the blank and then firing it. Since it is easy to leave nozzle marks on the surface of the nozzle when inkjet, there is a problem of nozzle print wire drawing, which causes the surface color of the plain bricks to be uneven, affecting the quality of the plain bricks.

[0004] The technical problem to be solved by this application is: how to improve the quality of plain bricks. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention aims to provide an inkjet process for high-grayscale solid-color bricks.

[0006] The technical solution adopted in the present invention is:

[0007] A high-grayscale solid-color brick inkjet process comprises the following steps:

[0008] S1. Applying base glaze on the surface of the blank and firing;

[0009] S2, spraying color paste on the base glaze and firing;

[0010] S3, applying a base color ink of the same color as the color paste to the surface of the color paste by screen printing to form a base color;

[0011] S4, using digital inkjet to spray ink on the brick surface;

[0012] S5, firing;

[0013] The specific gravity of the color paste is 2.20-2.30 g / cm 3 The particle size of the color paste is 1.5-2.5 μm, and the solid content of the color paste is 74.5-75.5%.

[0014] By applying base glaze, color paste, base color and inkjet to the surface of the blank in sequence, the grayscale of the surface of the plain brick is reduced, and the problem of affecting the color of the plain brick surface due to nozzle drawing during inkjet is avoided, which improves the quality of the plain brick. The color paste serves as the base color and can neutralize the original color of the blank and improve the color of the plain brick. If the specific gravity of the color paste is too large and the coating amount is large, the uniformity of the color paste is reduced. If the specific gravity of the color paste is too small, it cannot effectively cover the color of the blank. Inkjet printing on the color paste can effectively reduce the grayscale of the plain brick, making the color of the plain brick more natural and realistic, and avoiding the phenomenon of uneven color on the surface of the plain brick caused by nozzle drawing.

[0015] In some embodiments, the coating amount of the base glaze is 125g / m 2 -170g / m 2 .

[0016] Applying base glaze on the body can improve the color rendering of plain bricks while reducing the influence of the body color on the color rendering of plain bricks, further reducing the amount of color paste applied.

[0017] In some embodiments, the coating amount of the color paste is 7g / m 2 -13g / m 2 .

[0018] Through the color paste parameters set in this application and the coordination with the base glaze, the amount of color paste applied is greatly reduced, and the color rendering is better, which can well cover the original color of the body and further improve the quality of plain bricks.

[0019] In some embodiments, in step S3, the coating amount of the base color ink is 90g / m 2 -110g / m -2 .

[0020] In some embodiments, in step S4, the coating amount of the ink is 20 g / m 2 -40g / m 2 .

[0021] The current ink coating amount on the surface of plain bricks is 400g / m 2 -600g / m 2 This application greatly reduces the amount of ink applied by applying base glaze, color paste, base color, inkjet and other steps and coordinating the parameters of the color paste, thereby reducing the phenomenon of drawing and uneven color on the surface of plain bricks and improving the quality of plain bricks.

[0022] In some embodiments, the base glaze is composed of the following components: Al2O3 5.99%, SiO2 57.35%, Fe2O3 0.09%, CaO 8.48%, MgO 3.45%, KO 5.12%, Na2O 0.18%, TiO2 0.02%, Zr(Hf)O2 4.38%, Li2O 0.01%, PbO 0.05, ZnO 8.95%, CdO 0.01%, SrO 0.01%, MnO 0.01%, B2O 3 5.53% and defoaming agent 0.37%.

[0023] During the firing process, the base glaze can produce intermediate products with carbon dioxide, which can make the plain bricks produce a wider gray range and ensure the stability of the color.

[0024] In some embodiments, the ground enamel has a loss on ignition of less than 0.05%.

[0025] In some embodiments, the coating amount ratio of the color paste to the base color ink is 1:(10-12).

[0026] Using a small amount of color paste can improve the color rendering effect of plain bricks, reduce the amount of ink used, and thus greatly reduce production costs.

[0027] The beneficial effects of the present invention are:

[0028] By applying base glaze, color paste, base color and inkjet to the surface of the blank in sequence, the grayscale of the surface of the plain brick is reduced, and the problem of affecting the color of the plain brick surface due to nozzle drawing during inkjet is avoided, which improves the quality of the plain brick. The color paste serves as the base color and can neutralize the original color of the blank and improve the color of the plain brick. If the specific gravity of the color paste is too large and the coating amount is large, the uniformity of the color paste is reduced. If the specific gravity of the color paste is too small, it cannot effectively cover the color of the blank. Inkjet printing on the color paste can effectively reduce the grayscale of the plain brick, making the color of the plain brick more natural and realistic, and avoiding the phenomenon of uneven color on the surface of the plain brick caused by nozzle drawing. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the appended tables in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] A high grayscale solid color brick inkjet process is prepared by the following method:

[0032] S1, apply 150g / m 2 The base glaze is prepared and fired. The base glaze consists of the following ingredients: Al2O3 5.99%, SiO2 57.35%, Fe2O3 0.09%, CaO 8.48%, MgO 3.45%, KO 5.12%, Na2O 0.18%, TiO2 0.02%, Zr(Hf)O2 4.38%, Li2O 0.01%, PbO 0.05, ZnO 8.95%, CdO 0.01%, SrO 0.01%, MnO 0.01%, B2O3 5.53% and defoaming agent 0.37%, and the loss on ignition of the base glaze is 0.05%.

[0033] S2, spray 9g / m2 on the base glaze 2 The specific gravity is 2.25g / cm 3 , a black color paste with a particle size of 2.0 μm and a solid content of 75.1% and fired;

[0034] S3, 100g / m 2 The base color ink of the same color as the color paste is applied on the surface of the black color paste by screen printing to form the base color;

[0035] S4, use digital inkjet to spray 30g / m on the brick surface 2 Ink of the same color as the color paste;

[0036] S5, firing;

[0037] Comparative Example 1

[0038] A high grayscale solid color brick inkjet process, the difference from Example 1 is that 139g / m2 is directly applied on the surface of the green body. 2 Ink of the same color as the color paste.

[0039] Comparative Example 2

[0040] A high grayscale solid color brick inkjet process, the difference from Example 1 is that the coating amount of the color paste is 3g / m 2 .

[0041] Comparative Example 3

[0042] A high grayscale solid color brick inkjet process, the difference from Example 1 is that the coating amount of the color paste is 20g / m 2 .

[0043] Comparative Example 4

[0044] A high grayscale solid color brick inkjet process, which is different from Example 1 in that in step S4, the ink coating amount is 10g / m 2 .

[0045] Comparative Example 5

[0046] A high grayscale solid color brick inkjet process, which is different from Example 1 in that in step S4, the ink coating amount is 100g / m 2 .

[0047] Comparative Example 6

[0048] A high grayscale solid color brick inkjet process, which is different from Example 1 in that in step S1, the coating amount of the base glaze is 50g / m 2 .

[0049] Comparative Example 7

[0050] A high grayscale solid color brick inkjet process, which is different from Example 1 in that in step S1, the coating amount of the base glaze is 250g / m 2 .

[0051] Comparative Example 8

[0052] A high grayscale solid color brick inkjet process, which is different from Example 1 in that in step S3, the coating amount of the base color ink is 50g / m 2 .

[0053] Comparative Example 9

[0054] A high grayscale solid color brick inkjet process, which is different from Example 1 in that in step S3, the coating amount of the base color ink is 200g / m 2 .

[0055] Comparative Example 10

[0056] A high grayscale solid color brick inkjet process, the difference from Example 1 is that the specific gravity of the color paste is 1g / cm 3 .

[0057] Comparative Example 11

[0058] A high grayscale solid color brick inkjet process, the difference from Example 1 is that the specific gravity of the color paste is 5g / cm 3 .

[0059] Comparative Example 12

[0060] A high-grayscale solid-color brick inkjet process, which differs from Example 1 in that the particle size of the color paste is 0.1 μm.

[0061] Comparative Example 13

[0062] A high-grayscale solid-color brick inkjet process, which differs from Example 1 in that the particle size of the color paste is 10 μm.

[0063] The remaining steps of Comparative Examples 1-13 are consistent with those of Example 1.

[0064] The surface properties and physical properties (such as surface smoothness and product quality) of the products obtained in the above embodiments and comparative examples were observed. The surface color of the plain bricks was compared with the color chart. The grayscale tester was used to test the grayscale of the surface of the plain bricks. The average of three values for each embodiment and comparative example was taken and recorded. The specific test results are shown in Table 1.

[0065] Table 1 Surface properties and physical properties of products

[0066]

[0067]

[0068] The experimental results show that the surface color of the plain bricks produced by the present application scheme is consistent with the color card, the color is uniform and the surface of the plain bricks is smooth. The quality of the plain bricks is good, the production efficiency is high, and the production cost is low.

[0069] Compared with Comparative Example 1, in Example 1, the grayscale of the plain bricks prepared in the present application is reduced by more than 80% when the ink coating amount is the same, and the surface is smooth and the color rendering is better; compared with Comparative Examples 2-3, in Example 1, the coating amount of the color paste is less, which improves the grayscale value of the plain bricks, and the coating amount of the color paste is more, which increases the processing time and production cost, and affects the smoothness of the surface of the plain bricks.

[0070] According to the comparison of the experimental results of Example 1 and Comparative Examples 10-13, when the particle size of the color paste is too small, the color of the color paste is uniform but it is easy to sediment, which increases the grayness of the plain brick. When the particle size of the color paste is too large, the color of the color paste is uneven and it is easy to show the base color of the green body, making the surface of the plain brick mottled.

[0071] According to the experimental results of Example 1 compared with Comparative Examples 8-9, when the coating amount ratio of the color paste to the base color ink is between 1:(10-12), using a small amount of color paste can improve the color rendering effect of the plain brick, reduce the amount of ink used, and greatly reduce the production cost.

[0072] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high grayscale solid color brick inkjet process, characterized in that: The steps include: S1. Applying base glaze on the surface of the body and firing; S2, spraying color paste on the base glaze and firing; S3, applying a base color ink of the same color as the color paste to the surface of the color paste by screen printing to form a base color; S4, using digital inkjet to spray ink on the brick surface; S5, firing; The specific gravity of the color paste is 2.20-2.30 g / cm 3 The particle size of the color paste is 1.5-2.5 μm, and the solid content of the color paste is 74.5-75.5%.

2. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: The coating amount of the base glaze is 125g / m 2 -170g / m 2 .

3. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: The coating amount of the color paste is 7g / m 2 -13g / m 2 .

4. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: In step S3, the coating amount of the base color ink is 90g / m 2 -110g / m 2 .

5. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: In step S4, the coating amount of the ink is 20g / m 2 -40g / m 2 .

6. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: The base glaze is composed of the following ingredients Composition: Al2O35.99%, SiO257.35%, Fe2O30.09%, CaO8.48%, MgO3.45%, KO5.12%, Na2O0.18%, TiO20.02%, Zr(Hf)O24.38%, Li2O0.01%, PbO0.05, ZnO8.95%, CdO0.01%, SrO0.01%, MnO0.01%, B2O35.53% and defoaming agent 0.37%.

7. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: The loss on ignition of the bottom glaze is less than 0.05%.

8. The high grayscale solid color brick inkjet process according to claim 1, characterized in that: The coating amount ratio of the color paste to the base color ink is 1:(10-12).

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