Preparation process of a matte modified glass

Abstract

The present invention discloses a preparation process of matte modified glass, which includes a matte layer, a light-transmitting layer and a decorative layer; the light-transmitting layer is a glass substrate, the matte layer and the decorative layer are distributed on both sides of the light-transmitting layer, the matte layer is formed by spraying at least one layer of transparent ink, the thickness of the matte layer is 50-70 μm, the decorative layer is formed by sintering at least one layer of transparent ink, and is obtained through three steps of cleaning, intaglio printing and low-temperature screen printing. By adjusting the proportion of the composite acid, controlling the residence time, the sintering temperature and the concentration of the concentrated sodium hydroxide for shallow etching, the matte glass has the advantages of high light transmittance, good privacy, strong three-dimensional sense, rich texture, good ornamental property and strong light resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of glass, and particularly relates to a matte modified glass and its process. Background Art

[0002] Glass is widely used because of its transparency, luster and considerable hardness. In daily life, common glass products belong to amorphous inorganic non-metallic materials, having good transparency and chemical stability. Glass with improved characteristics can also be applied to various other scenarios.

[0003] There are many types of glass, and the corresponding scenarios are also very broad. For example:

[0004] 1) Insulating glass is composed of two or more layers of ordinary flat glass, and its sound insulation and heat insulation effects are higher than those of single-layer glass; it is mainly used for the outer glass decoration of heating, air conditioning, and sound insulation facilities. It should be noted that the optical performance, thermal conductivity coefficient, and sound insulation coefficient of insulating glass should meet national standards.

[0005] 2) Tempered glass, also known as toughened glass, has a thickness of 2 - 5 mm. Its flexural strength and impact resistance are 3 - 5 times higher than those of ordinary flat glass. After breaking, it will not fall off directly but show a network of cracks; it is mainly used for doors and windows, partition walls, and cabinet doors.

[0006] 3) Wired glass, also known as shatterproof glass. It has excellent fire resistance, can block flames, does not crack during high-temperature combustion, and will not cause fragments to injure people when broken. In addition, it also has anti-theft performance, and the wire mesh will block when the glass is cut; it is mainly used for roof skylights and balcony windows.

[0007] 4) High-performance insulating glass, in addition to enclosing dry air between two layers of glass, also coats a special metal film with good thermal performance on the side of the middle air layer of the outer glass. It can block the energy of solar ultraviolet rays from entering the room; it is mainly used for glass houses or the outer glass decoration of heating, air conditioning, and sound insulation facilities.

[0008] 5) Laminated glass is a type of safety glass. Its main characteristic is good safety. When broken, the glass fragments do not fall off and fly around, but only produce radial cracks, which will not cause injury; it is mostly used for doors and windows in contact with the outside.

[0009] The above several scenarios only represent the appearance of glass after several of its properties have been optimized and improved. Therefore, we can still optimize other aspects of the performance of glass. The present application discloses a matte modified glass and its process. Summary of the Invention

[0010] In view of the deficiencies of the prior art, the present invention provides a matte modified glass and its process.

[0011] To achieve the above object, the present invention adopts the following technical solutions. A matte modified glass includes:

[0012] A matte layer, a light-transmitting layer, and a decorative layer. The light-transmitting layer is the original glass sheet. The matte layer and the decorative layer are distributed on both sides of the light-transmitting layer. The matte layer is formed by spraying at least one layer of transparent ink, and the thickness of the matte layer is 50 - 70 μm. The decorative layer is formed by sintering at least one layer of transparent ink.

[0013] Preferably, the preparation process includes the following steps:

[0014] S1. Cleaning: Clean the original glass sheet in a cleaning machine, remove water, and dry it for later use to obtain the light-transmitting layer.

[0015] S2. Gravure printing: Place the original glass sheet obtained in step S1 on the operating table, place a mask on one side of the original glass sheet, coat a certain thickness of composite acid paste on the entire area of the original glass sheet, and let the composite acid stay on the surface of the original glass sheet for a period of time. Crystals are formed on one side surface of the etched original glass sheet; then remove the mask, scrape off the composite acid paste, and repeatedly flush the residual composite acid on the surface of the original glass sheet with clean water and dry it; film-forming treatment, place the etched side of the original glass sheet at the operating position of the ink jet machine, spray transparent ink on the entire area of the original glass sheet, and let the ink dry to complete the film-forming to obtain the matte layer.

[0016] S3 Low-temperature screen printing: Place the unetched side of the original glass sheet at the operating position of the screen printing machine, cover a mask that coincides with the part of the back of the glass with etched texture, perform screen printing on the blank area without the mask covering using the screen printing machine, perform shallow etching on the blank area with concentrated sodium hydroxide to form a concave texture, repeatedly flush with clean water, collect the flushing liquid into the collection pool, and finally spray and stack transparent ink in the concave texture and sinter at low temperature until the ink dries to obtain the decorative layer.

[0017] Preferably, the thickness of the composite acid paste coated in step S2 is 0.03 - 0.05 mm, the residence time is 2 - 3 min, and the flushing times are at least 3 times.

[0018] Preferably, the composite acid paste in step S2 is composed of composite acid, binder, and shaping agent. The composite acid is fluoroantimonic acid, fluoroantimonosulfonic acid, and ammonium bifluoride, m fluoroantimonic acid:m fluoroantimonosulfonic acid:m ammonium bifluoride = 0.5:1:8 - 1:1:9; by weight, 80% composite acid paste, 10% binder, and 10% shaping agent.

[0019] The transparent ink in step S2, by weight, includes 78% resinous high polymer, 20% organic solvent, and 2% film-forming agent.

[0020] Preferably, the process rate of the screen printer in step S3 is 10 s to 1 min per sheet, and the process parameters of the shallow etching are D 纹理 (depth of the concave texture) = 0.02 to 0.05 mm, W 纹理 (width of the concave texture) = 0.02 to 0.05 mm, and the number of flushing times is at least 5 times.

[0021] The superimposed spraying parameters of the ink in step S3 satisfy: D 纹理 (depth of the ink sprayed on the concave texture) = 0.02 to 0.05 mm, W 纹理 (width of the ink sprayed on the concave texture) = 0.02 to 0.05 mm.

[0022] Preferably, the temperature of the low-temperature sintering in step S3 is 160 to 220 °C.

[0023] Preferably, the concentration of the concentrated sodium hydroxide in step S3 is 36 to 40%.

[0024] Advantages of the present invention:

[0025] First, the transparent ink does not affect the light transmittance of the glass itself and is a protection for the crystallized body with a matte effect after etching; the color of the transparent ink itself can also be adjusted, and on the premise of ensuring the light transmittance, the ornamental property of the matte glass is improved;

[0026] Second, the combination of the shallow depth and low-temperature screen printing process of the transparent ink to a certain extent avoids fingerprint marks on the surface of the matte glass;

[0027] Third, the use of the composite acid paste, abandoning the commonly used hydrofluoric acid, and adopting fluoroantimonic acid, fluoroantimonosulfonic acid and ammonium bifluoride that meet the process purpose, reduces the harm to the human body during the process operation; the usage amount of the acid paste is reflected as the thickness in this application, and under the appropriate thickness, the flash effect of the crystallized body is the best, and at the same time, the mask will not be damaged.

[0028] In summary, the matte modified glass and its process of this application have: 1) high light transmittance of the light-transmitting layer; 2) good privacy of the matte layer; 3) strong three-dimensional sense, rich texture, good ornamental property and strong light resistance of the decorative layer; 4) simple process and excellent process effect achieved. Description of the Drawings

[0029] Figure 1 It is the layout diagram of each layer of the matte glass of the present invention, in which the texture, size and position are only for illustrative purposes and do not serve as spatial and style limitations.

[0030] Reference numerals: 1, matte layer; 2, light-transmitting layer; 3, decorative layer. Detailed Embodiments

[0031] The present invention will be further described below through specific embodiments, but it does not limit the scope of the present invention.

[0032] Embodiment 1:

[0033] S1. Cleaning: Clean the original glass sheet in a cleaning machine, remove water, and dry it for standby to obtain the light-transmitting layer 2;

[0034] Among them, the cleaning uses the SY-500 ultra-thin glass cleaning machine of Anhui Ruilong Glass Machinery Co., Ltd.

[0035] S2. Gravure printing: Place the original glass sheet obtained in step S1 on the operating table, place a mask on one side of the original glass sheet, coat a certain thickness of composite acid paste on the entire area of the original glass sheet, and let the composite acid stay on the surface of the original glass sheet for a period of time. Crystals are formed on one side surface of the etched original glass sheet; then remove the mask, scrape off the composite acid paste, repeatedly wash the residual composite acid paste on the surface of the original glass sheet with clean water, and dry it; perform film-forming treatment. Place the etched side of the original glass sheet at the operating position of the inkjet printer, spray transparent ink on the entire area of the original glass sheet, and let the ink dry to complete the film-forming, obtaining the fog layer 1;

[0036] Among them, the thickness of the coated composite acid paste is 0.03 - 0.05 mm, the residence time is 2 - 3 min, and the number of flushing times is at least 3 times.

[0037] Among them, the composite acid paste is composed of composite acid, binder, and excipient. The composite acid is fluoroantimonic acid, fluoroantimonosulfonic acid, and ammonium bifluoride, and m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride = 0.5: 1: 8.5; by weight, 80% composite acid, 10% binder, and 10% excipient.

[0038] Among them, the transparent ink, by weight, includes 78% resinous high polymer, 20% organic solvent, and 2% film-forming agent. The resinous high polymer is chlorinated polypropylene, the organic solvent is xylene, and the film-forming agent is an acrylic resin film-forming agent.

[0039] S3. Low-temperature screen printing: Place the unetched side of the original glass sheet at the operating position of the screen printer, cover it with a mask that coincides with the etched texture on the back of the glass, perform screen printing on the blank area without the mask covering using the screen printer, perform shallow etching on the blank area with concentrated sodium hydroxide to form a concave texture, repeatedly wash it with clean water, collect the washing liquid into the sump, and finally spray and stack transparent ink in the concave texture and sinter at low temperature until the ink dries to obtain the decorative layer 3.

[0040] Among them, the process rate of the screen printer is 10 s - 1 min / sheet, and the process parameters of the shallow etching are D 纹理= 0.02 - 0.05 mm, W 纹理 = 0.02 - 0.05 mm, and the number of flushing times is at least 5 times.

[0041] Among them, the superimposed spraying parameters of the ink satisfy: D 纹理 = 0.06 - 0.08 mm, W 纹理 = 0.02 - 0.05 mm.

[0042] Among them, the temperature of the low - temperature sintering is 160 - 220 °C.

[0043] Among them, the concentration of the concentrated sodium hydroxide is 36 - 40%.

[0044] Example 2:

[0045] S1. Cleaning: Clean the original glass sheet in a cleaning machine, remove water, dry it, and set it aside to obtain the light - transmitting layer 2;

[0046] Among them, the cleaning uses the SY - 500 ultra - thin glass cleaning machine of Anhui Ruilong Glass Machinery Co., Ltd.

[0047] S2. Gravure printing: Place the original glass sheet obtained in step S1 on the operating table, place a mask on one side of the original glass sheet, coat a certain thickness of composite acid paste on the entire area of the original glass sheet, and let the composite acid stay on the surface of the original glass sheet for a period of time. Crystals are formed on one side surface of the etched original glass sheet; then remove the mask, scrape off the composite acid paste, repeatedly flush the residual composite acid paste on the surface of the original glass sheet with clean water, and dry it; perform film - forming treatment. Place the etched side of the original glass sheet at the operating position of the ink jetting machine, spray transparent ink on the entire area of the original glass sheet, and let the ink dry to complete the film - forming to obtain the mist layer 1;

[0048] Among them, the thickness of the coated composite acid paste is 0.03 - 0.05 mm, the residence time is 2 min, and the number of flushing times is at least 3 times.

[0049] Among them, the composite acid paste is composed of composite acid, binder, and excipient. The composite acid is fluoroantimonic acid, fluoroantimonosulfonic acid, and ammonium bifluoride, and m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride = 0.5:1:8.5; by weight, 80% composite acid, 10% binder, and 10% excipient.

[0050] Among them, the transparent ink, by weight, includes 78% resin - type high - polymer, 20% organic solvent, and 2% film - forming agent. The resin - type high - polymer is chlorinated polypropylene, the organic solvent is xylene, and the film - forming agent is an acrylic resin film - forming agent.

[0051] S3. Low-temperature screen printing: Place the unetched side of the glass substrate on the operating position of the screen printer, cover it with a mask that coincides with the etched texture on the back of the glass, perform screen printing on the blank area without the mask using the screen printer, perform shallow etching on the blank area with concentrated sodium hydroxide to form a concave texture, rinse repeatedly with clean water, collect the rinsing liquid into the sump, and finally spray and stack transparent ink into the concave texture, and sinter at low temperature until the ink dries to obtain the decorative layer 3.

[0052] Among them, the process rate of the screen printer is 10 s to 1 min per sheet, and the process parameters of the shallow etching are D 纹理 = 0.02 to 0.05 mm, W 纹理 = 0.02 to 0.05 mm, and the number of rinsing times is at least 5 times.

[0053] Among them, the spray and stack parameters of the ink meet: D 纹理 = 0.06 to 0.08 mm, W 纹理 = 0.02 to 0.05 mm.

[0054] Among them, the temperature of the low-temperature sintering is 160 to 220 °C.

[0055] Among them, the concentration of the concentrated sodium hydroxide is 36 to 40%.

[0056] Example 3:

[0057] S1. Cleaning: Clean the glass substrate in a cleaning machine, remove water, and dry it for standby to obtain the light-transmitting layer;

[0058] Among them, the cleaning uses the SY-500 ultra-thin glass cleaning machine of Anhui Ruilong Glass Machinery Co., Ltd.

[0059] S2. Gravure printing: Place the glass substrate obtained in step S1 on the operating table, place a mask on one side of the glass substrate, coat a certain thickness of composite acid paste on the entire area of the glass substrate, and let the composite acid stay on the surface of the glass substrate for a period of time. Crystals are formed on one side surface of the etched glass substrate; then remove the mask, scrape off the composite acid paste, and repeatedly rinse the residual composite acid paste on the surface of the glass substrate with clean water, and dry it to obtain the mist layer (S1; film-forming treatment, place the etched side of the glass substrate at the operating position of the ink jet printer, spray transparent ink on the entire area of the glass substrate, and dry the ink to complete the film-forming to obtain the mist layer;

[0060] Among them, the thickness of the coated composite acid paste is 0.03 to 0.05 mm, the residence time is 2 to 3 min, and the number of rinsing times is at least 3 times.

[0061] Among them, the composite acid paste is composed of a composite acid, a binder, and a shaping agent. The composite acid is fluoroantimonic acid, fluoroantimonic sulfonic acid, and ammonium bifluoride, with m fluoroantimonic acid: m fluoroantimonic sulfonic acid: m ammonium bifluoride = 0.5: 1: 8.5; by weight, 80% is the composite acid, 10% is the binder, and 10% is the shaping agent.

[0062] Among them, the transparent ink, by weight, includes 78% resinous polymers, 20% organic solvents, and 2% film-forming agents. The resinous polymers are chlorinated polypropylene, the organic solvents are xylene, and the film-forming agents are acrylic resin film-forming agents.

[0063] S3. Low-temperature screen printing: Place the unetched side of the glass substrate on the operating position of the screen printing machine, cover it with a mask that coincides with the etched texture part on the back of the glass, use the screen printing machine to perform screen printing on the blank area without the mask covering, use concentrated sodium hydroxide to perform shallow etching on the blank area to form a concave texture, use clear water to rinse repeatedly, collect the rinsing liquid into the collection pool, and finally spray the transparent ink on the concave texture in layers, and sinter at low temperature until the ink dries to obtain a decorative layer.

[0064] Among them, the process rate of the screen printing machine is 10 s to 1 min per sheet, and the process parameters of the shallow etching are D 纹理 = 0.02 to 0.05 mm, W 纹理 = 0.02 to 0.05 mm, and the number of flushing times is at least 5 times.

[0065] Among them, the parameters of the ink spraying in layers satisfy: D 纹理 = 0.06 to 0.08 mm, W 纹理 = 0.02 to 0.05 mm.

[0066] Among them, the temperature of the low-temperature sintering is 160 to 220 °C.

[0067] Among them, the concentration of the concentrated sodium hydroxide is 36%.

[0068] Example 4:

[0069] S1. Cleaning: Clean the glass substrate in a cleaning machine, remove water, and dry it for standby to obtain a light-transmitting layer 2;

[0070] Among them, the cleaning uses the SY-500 ultra-thin glass cleaning machine of Anhui Ruilong Glass Machinery Co., Ltd.

[0071] S2. Gravure printing: Place the glass substrate obtained in step S1 on the operating table, place a mask on one side of the glass substrate, apply a composite acid paste with a certain thickness to the entire area of the glass substrate, and let the composite acid stay on the surface of the glass substrate for a period of time. Crystals are formed on one side surface of the etched glass substrate; then remove the mask, scrape off the composite acid paste, repeatedly rinse the residual composite acid paste on the surface of the glass substrate with clean water, and dry it; perform film-forming treatment. Place the etched side of the glass substrate at the operating position of the inkjet printer, spray transparent ink on the entire area of the glass substrate, and let the ink dry to complete the film-forming, obtaining the fog layer 1;

[0072] Among them, the thickness of the applied composite acid paste is 0.03 - 0.05 mm, the residence time is 2 - 3 min, and the number of rinsing times is at least 3 times.

[0073] Among them, the composite acid paste is composed of a composite acid, a binder, and a shaping agent. The composite acid is fluoroantimonic acid, fluoroantimonosulfonic acid, and ammonium bifluoride, and m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride = 0.5: 1: 8.5; by weight, 80% composite acid, 10% binder, and 10% shaping agent.

[0074] Among them, the transparent ink, by weight, includes 78% resinous polymer, 20% organic solvent, and 2% film-forming agent. The resinous polymer is chlorinated polypropylene, the organic solvent is xylene, and the film-forming agent is an acrylic resin film-forming agent.

[0075] S3. Low-temperature screen printing: Place the unetched side of the glass substrate at the operating position of the screen printer, cover it with a mask that coincides with the etched texture part on the back of the glass, perform screen printing on the blank area without the mask using the screen printer, perform shallow etching on the blank area with concentrated sodium hydroxide to form a concave texture, repeatedly rinse it with clean water, collect the rinsing liquid into the sump, and finally spray and stack transparent ink into the concave texture, and sinter at low temperature until the ink dries to obtain the decorative layer 3.

[0076] Among them, the process rate of the screen printer is 10 s - 1 min / sheet, and the process parameters of the shallow etching are D 纹理 = 0.02 - 0.05 mm, W 纹理 = 0.02 - 0.05 mm, and the number of rinsing times is at least 5 times.

[0077] Among them, the spray and stack parameters of the ink satisfy: D 纹理 = 0.06 - 0.08 mm, W 纹理 = 0.02 - 0.05 mm.

[0078] Among them, the temperature of the low-temperature sintering is 180 °C.

[0079] Among them, the concentration of the concentrated sodium hydroxide is 36 - 40%.

[0080] Example 5: On the basis of Example 1, change the ratio of m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride in step S2 to 0.5:1:8, and the rest remains unchanged.

[0081] Example 6: On the basis of Example 1, change the ratio of m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride in step S2 to 0.5:1:9, and the rest remains unchanged.

[0082] Example 7: On the basis of Example 2, change the residence time in step S2 to 3 min, and the rest remains unchanged.

[0083] Example 8: On the basis of Example 3, change the concentration of concentrated sodium hydroxide in step S3 to 38%, and the rest remains unchanged.

[0084] Example 9: On the basis of Example 3, change the concentration of concentrated sodium hydroxide in the step to 40%, and the rest remains unchanged.

[0085] Comparative Example 1: On the basis of Example 1, change the ratio of m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride in step S2 to 0.5:1:7, and the rest remains unchanged.

[0086] Comparative Example 2: On the basis of Example 1, change the ratio of m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride in step S2 to 0.5:1:9.5, and the rest remains unchanged.

[0087] Comparative Example 3: On the basis of Example 2, change the residence time in step S2 to 4 min, and the rest remains unchanged.

[0088] Comparative Example 4: On the basis of Example 3, change the concentration of concentrated sodium hydroxide in step S3 to 42%, and the rest remains unchanged.

[0089] Comparative Example 5: On the basis of Example 4, change the low-temperature sintering temperature in step S3 to 150 °C, and the rest remains unchanged.

[0090] Comparative Example 6: On the basis of Example 4, change the low-temperature sintering temperature in step S3 to 230 °C, and the rest remains unchanged.

[0091] Testing method:

[0092] Testing the performance of the matte glass mainly involves the aspect of diffuse reflection. Use a transmittance meter LS117 based on the principle of diffuse transmission; use an AT-171 transmittance tester to test the transmittance of the object to be measured. The results are shown in the following table:

[0093] Control the ratio of the composite acid at m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride = 0.5:1:8 to 1:1:9; the crystallization effect of the matte glass is the best, the transmittance and reflectance reach an equilibrium, the glass has a good privacy protection effect and does not affect the illumination of daily light.

[0094] B. For the bonding strength between the ink and the glass, use a scraper for quality inspection and observe the state of the ink.

[0095]

[0096] Control the low-temperature sintering at 160 - 220 °C, the ink is firmly bonded and not easily denatured.

[0097] C. For the adjustment of the remaining parameters, mainly observe the state of the glass as the main basis, and the method is omitted.

[0098] Regarding the change in the concentration of concentrated sodium hydroxide, by combining Example 3 with Example 8 / 9 and Comparative Example 4, it can be obtained from the phenomenon observation that when it is within the range of 36 - 40%, there are concave textures in the decorative layer. If the concentration is too low, corrosion cannot be achieved within the process time, and if the concentration is too high, the concave textures are too deep and the glass strength is affected.

[0099] Regarding the change in the residence time, by combining Example 2 with Example 7 and Comparative Example 3, it can be obtained from the phenomenon observation that when the residence time is 2 - 3 min, the composite acid paste can complete the etching completely and does not corrode the mask, and it is convenient to wash and easy to remove; if the time is too long, over-etching occurs, and if the time is insufficient, the matte surface is not clear.

[0100] In summary, it can be seen that the present invention provides a matte glass with a high light transmittance of the light-transmitting layer, good privacy of the matte layer, strong three-dimensional sense of the decorative layer, rich texture, good ornamental property, and strong light resistance; and the process of this glass is simple and the achieved process effect is excellent.

Claims

1. A preparation process of a matte modified glass, the matte modified glass comprising a matte layer (1), a light-transmitting layer (2) and a decorative layer (3), the light-transmitting layer (2) being a glass original sheet, the matte layer (1) and the decorative layer (3) being distributed on both sides of the light-transmitting layer (2), the matte layer (1) being formed by spraying at least one layer of transparent ink, the thickness of the matte layer (1) being 50-70 μm, and the decorative layer (3) being formed by sintering at least one layer of transparent ink, characterized in that, The preparation process of the matte modified glass comprises the following steps: S1. Cleaning: Clean the glass substrate in a cleaning machine, remove water, dry it, and set it aside to obtain the light-transmitting layer (2). S2. Gravure printing: Place the glass substrate obtained in step S1 on the operating table, place a mask on one side of the glass substrate, coat a certain thickness of composite acid paste on the entire area of the glass substrate, and let the composite acid paste stay on the surface of the glass substrate for a period of time. Crystals are formed on one side surface of the etched glass substrate; then remove the mask, scrape off the composite acid paste, repeatedly wash the residual composite acid paste on the surface of the glass substrate with clean water, and dry it. Film-forming treatment: Place the etched side of the glass substrate at the operating position of the inkjet printer, spray transparent ink on the entire area of the glass substrate, let the ink dry, and complete the film-forming to obtain the matte layer (1). S3. Low-temperature screen printing: Place the unetched side of the glass substrate at the operating position of the screen printer, cover it with a mask that coincides with the part of the back of the glass with etched texture, use the screen printer to perform screen printing on the blank area without the mask covering, use concentrated sodium hydroxide to perform shallow etching on the blank area to form a concave texture, repeatedly wash it with clean water, collect the washing liquid into the sump, and finally spray and stack transparent ink in the concave texture, and sinter at low temperature until the ink dries to obtain the decorative layer (3).

2. The preparation process of a matte modified glass according to claim 1, characterized in that, In step S2, the thickness of the coated composite acid paste is 0.03 - 0.05 mm, the residence time is 2 - 3 min, and the number of flushing times is at least 3 times.

3. The preparation process of a matte modified glass according to claim 1, characterized in that, The composite acid paste in step S2 is composed of composite acid, binder and shaping agent, wherein the composite acid is fluoroantimonic acid, fluoroantimonosulfonic acid and ammonium bifluoride, m fluoroantimonic acid: m fluoroantimonosulfonic acid: m ammonium bifluoride = 0.5:1:8 - 1:1:9; by weight percentage, 80% composite acid, 10% binder and 10% shaping agent.

4. The preparation process of a matte modified glass according to claim 1, characterized in that, The transparent ink in step S2, by weight percentage, comprises 78% resinous polymer, 20% organic solvent and 2% film-forming agent.

5. The preparation process of a matte modified glass according to claim 1, characterized in that, The process rate of the screen printer in step S3 is 10 s to 1 min per piece, and the process parameters for shallow etching are: the depth D of the concave texture 纹理 = 0.02 to 0.05 mm, and the width W of the concave texture 纹理 = 0.02 to 0.05 mm, and the flushing times are at least 5 times.

6. The preparation process of a matte modified glass according to claim 1, characterized in that, The ink superposition spraying parameters in step S3 satisfy that the depth D of the ink sprayed on the concave texture 纹理 = 0.06~0.08 mm, and the width W of the ink sprayed on the concave texture 纹理 = 0.02~0.05 mm.

7. The preparation process of a matte modified glass according to claim 1, characterized in that, The temperature of the low-temperature sintering in step S3 is 160 - 220 °C.

8. The preparation process of a matte modified glass according to claim 1, characterized in that, The concentration of the concentrated sodium hydroxide in step S3 is 36 - 40%.

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