A method for preparing a high-performance luxury quartz slab with a natural texture

Abstract

The application discloses a preparation method of high-performance luxury quartz plate with natural texture, and belongs to the technical field of building materials. The silica sand aggregate is subjected to composite modification treatment of silane coupling agent and sodium phytate, so that the interface bonding force between the silica sand aggregate and the binder is enhanced, internal defects are reduced, and the strength of the quartz plate is improved. In addition, by adding modified unsaturated polyester resin, the stability is excellent, and the application of the quartz plate is helped to be enhanced. In addition, after optimization of the process, by extracting a pattern model and accurately filling texture color paste and supplementing dry color powder, the formation and distribution of the texture can be accurately controlled, natural texture with high-end visual feeling can be simulated, the texture is luxurious, and the aesthetic demand of high-end decoration can be met. In combination with the stage-by-stage rolling treatment process, the compactness of the quartz plate can be promoted, the quartz plate has more excellent application mechanical properties, clear texture can be better formed, production stability can be ensured, and the defective product rate can be reduced.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and more specifically, to a method for preparing a high-performance luxury quartz slab with natural texture. Background Technology

[0002] Artificial quartz slabs are widely used in the building decoration field due to their excellent properties such as high strength, wear resistance, stain resistance, and non-radioactivity. Traditional quartz slabs are mainly made by mixing quartz sand, quartz powder, and unsaturated polyester resin, and then curing them under vacuum and high pressure. However, their appearance is usually homogeneous in a single color or simple granular mixed color, with a dull texture and lack of layering. It is difficult to imitate the dynamic, deep, and varied textures of natural stones such as marble and granite, thus limiting their application in the high-end luxury decoration market.

[0003] Existing technologies, in order to improve the appearance of quartz slabs, involve layering multiple base materials of different colors and then stirring to form irregular textures. However, the textures created by this method are mostly limited to planar distribution, lacking the three-dimensional penetration and randomly interwoven veins of natural stone, resulting in a harsh visual effect. For example, Chinese patent application number CN202110681154.1 discloses a process for preparing textured quartz stone slabs through etching, including the following steps: Step 1: The quartz stone surface is treated with water-soluble amino-modified polydimethylsiloxane, the quartz stone surface is cleaned, and the quartz stone is dried; Step 2: The texture is designed, and an anti-corrosion film is engraved according to the designed texture; Step 3: The quartz stone mold is covered with adhesive to cover the areas that do not need etching; Step 4: The film is covered on the quartz stone surface that needs etching, and adhesive is applied around the edges of the film; Step 5: The etching agent is sprayed onto the quartz stone surface; Step 6: The etched texture is cleaned, wax residue is removed, and a quartz stone textured slab is obtained. For example, Chinese patent application CN202210613734.1 discloses an artificial quartz stone patterned slab with natural texture and its preparation method. In this invention, the artificial quartz stone contains patterns in the shape of natural textures. After the stone blank is installed in the mold frame, the side wall of the mold frame is tapped at regular intervals to prevent the stone blank from sticking to the side wall and to prevent damage to the stone blank during the removal process. However, the artistic quality of the texture still cannot meet the requirements of high-end customers, and the overall performance of the prepared quartz slab needs improvement. Summary of the Invention

[0004] Based on this, in order to solve one of the above-mentioned technical problems, the present invention provides a method for preparing a high-performance luxury quartz plate with natural texture, the specific technical solution of which is as follows: A method for preparing a high-performance luxury quartz slab with natural texture includes the following steps: S1. Modified quartz sand aggregates of different gradations, binders and brightening agents are stirred and treated under the first condition to obtain mixture A; S2. Carboxymethyl cellulose and polyvinyl alcohol are added to the mixture A, stirred under the second condition, then a curing agent is added, and stirring is continued to obtain mixture B; S3. Take a portion of the mixture B to prepare texture color paste, stir and process it to obtain different color pastes; S4. The remaining mixture B after step S3 is automatically laid on a flat mold frame lined with kraft paper and patterned stripes by a robotic arm and then rolled. S5. The pattern strip model from step S4 is slowly lifted out by a robotic arm, and the grooves of the original pattern strip are filled with the color paste obtained in step S3 by the robotic arm, and dry colorant is added. S6. After completing step S4, vibratory pressing is used to form the slab; S7. The slab is cured and then subjected to thickness determination, grinding and polishing to obtain a high-performance luxury quartz slab with natural texture.

[0005] Further, by weight, the quartz plate comprises the following raw materials in parts by weight: 80 to 90 parts modified quartz sand aggregate, 5 to 8 parts binder, 0.03 to 1 part brightening agent, 7 to 12 parts carboxymethyl cellulose, 1 to 3 parts polyvinyl alcohol, and 0.03 to 1 part curing agent.

[0006] Furthermore, the modified quartz sand aggregate is prepared by adding quartz sand aggregate to a silane coupling agent precursor solution, stirring for 15 min to 30 min, then adding sodium phytate, and stirring at a speed of 50 r / min to 300 r / min for 1 h to 3 h to obtain the modified quartz sand aggregate.

[0007] Furthermore, the adhesive is a modified unsaturated polyester resin, and the viscosity of the unsaturated polyester resin is 2.7 Pa·s to 2.8 Pa·s.

[0008] Furthermore, the method for preparing the modified unsaturated polyester resin is as follows: 2-Hydroxy-4-n-octyloxybenzophenone and dibutylhydroxytoluene were added to an unsaturated polyester resin, along with dimethyl itaconic acid. The mixture was stirred at 80℃~100℃ for 40min~120min, and then polyvinyl butyral was added. The mixture was stirred for another 20min~30min to obtain the modified unsaturated polyester resin.

[0009] Furthermore, the brightening agent is a rare earth polishing powder.

[0010] Further, in step S1, the gradations of the modified quartz sand aggregates with different gradations are as follows: the weight ratio of modified quartz sand aggregate 100~120 mesh, modified quartz sand aggregate 121~150 mesh, modified quartz sand aggregate 151~200 mesh, modified quartz sand aggregate 201~300 mesh, and modified quartz sand aggregate 301~400 mesh is (1~3):(1~5):(3~5):(7~12):(5~15).

[0011] Furthermore, in step S3, the different color pastes include color paste A with added black powder and color paste B with added yellow powder.

[0012] Further, in step S4, the process parameters for the rolling process are as follows: the first stage is processed at a frequency of 35Hz~37Hz for 10s~15s, the second stage is processed at a frequency of 39Hz~40Hz for 8s~10s, the third stage is processed at a frequency of 41Hz~42Hz for 8s~10s, and the fourth stage is processed at a frequency of 42Hz for 40s~50s.

[0013] Further, the curing process in step S5 is as follows: the temperature is increased to 60℃~90℃ at a rate of 3℃ / min~5℃ / min, and held for 10min~20min, then the temperature is increased to 100℃~110℃ at a rate of 1℃ / min~3℃ / min, and held for 30min~50min.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention enhances the interfacial bonding between quartz sand aggregate and binder by performing composite modification treatment with silane coupling agent and sodium phytate, reducing internal defects and improving the strength of quartz slabs. In addition, by adding modified unsaturated polyester resin as a binder, which has antioxidant and ultraviolet absorption properties, it has more stable applicability. Furthermore, the crosslinking and toughening treatments help to enhance the mechanical strength of quartz slabs.

[0015] 2. Through process optimization, this invention extracts the pattern model and precisely fills it with texture pigments and adds dry pigment powder, thereby accurately controlling the formation and distribution of the texture, simulating a natural texture with a high-end visual feel, possessing a luxurious texture, and meeting the aesthetic needs of high-end decoration.

[0016] 3. This invention, through a staged rolling process, not only promotes the density of quartz slabs, giving them superior mechanical properties, but also helps to create clearer textures, ensuring stable production and reducing the defect rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the high-performance luxury quartz plate prepared in Example 1 of the present invention. Detailed Implementation

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0019] A method for preparing a high-performance luxury quartz slab with natural texture according to one embodiment of the present invention includes the following steps: S1. Modified quartz sand aggregates of different gradations, binders and brightening agents are stirred and treated under the first condition to obtain mixture A; S2. Carboxymethyl cellulose and polyvinyl alcohol are added to the mixture A, stirred under the second condition, then a curing agent is added, and stirring is continued to obtain mixture B; S3. Take a portion of the mixture B to prepare texture color paste, stir and process it to obtain different color pastes; S4. The remaining mixture B after step S3 is automatically laid on a flat mold frame lined with kraft paper and patterned stripes by a robotic arm and then rolled. S5. The pattern strip model from step S4 is slowly lifted out by a robotic arm, and the grooves of the original pattern strip are filled with the color paste obtained in step S3 by the robotic arm, and dry colorant is added. S6. After completing step S4, vibratory pressing is used to form the slab; S7. The slab is cured and then subjected to thickness determination, grinding and polishing to obtain a high-performance luxury quartz slab with natural texture.

[0020] In one embodiment, the quartz plate comprises, by weight, the following raw materials: 80 to 90 parts modified quartz sand aggregate, 5 to 8 parts binder, 0.03 to 1 part brightener, 7 to 12 parts carboxymethyl cellulose, 1 to 3 parts polyvinyl alcohol, and 0.03 to 1 part curing agent.

[0021] In one embodiment, the modified quartz sand aggregate is prepared by adding quartz sand aggregate to a silane coupling agent precursor solution, stirring for 15 min to 30 min, then adding sodium phytate, and stirring at a speed of 50 r / min to 300 r / min for 1 h to 3 h to obtain modified quartz sand aggregate.

[0022] In one embodiment, the silane coupling agent precursor solution is obtained by mixing 3-aminopropyltriethoxysilane and ethanol in a weight ratio of (3~10):(1~7).

[0023] In one embodiment, the weight ratio of the quartz sand aggregate, the silane coupling agent precursor solution, and the sodium phytate is (5~10):(8~10):(2~5).

[0024] In one embodiment, the adhesive is a modified unsaturated polyester resin, and the viscosity of the unsaturated polyester resin is 2.7 Pa·s to 2.8 Pa·s.

[0025] In one embodiment, the modified unsaturated polyester resin is prepared by: 2-Hydroxy-4-n-octyloxybenzophenone and dibutylhydroxytoluene were added to an unsaturated polyester resin, along with dimethyl itaconic acid. The mixture was stirred at 80℃~100℃ for 40min~120min, and then polyvinyl butyral was added. The mixture was stirred for another 20min~30min to obtain the modified unsaturated polyester resin.

[0026] In one embodiment, the weight ratio of 2-hydroxy-4-n-octyloxybenzophenone, butylated hydroxytoluene, unsaturated polyester resin, dimethyl itaconic acid, and polyvinyl butyral is (0.01~0.05):(0.01~0.07):(8~10):(0.01~0.03):(0.01~0.05).

[0027] In one embodiment, the brightening agent is a rare earth polishing powder.

[0028] In one embodiment, the curing agent is at least one of tert-butyl peroxide and benzoyl peroxide.

[0029] In one embodiment, in step S1, the gradation of the modified quartz sand aggregates with different gradations is as follows: the weight ratio of modified quartz sand aggregate 100~120 mesh, modified quartz sand aggregate 121~150 mesh, modified quartz sand aggregate 151~200 mesh, modified quartz sand aggregate 201~300 mesh, and modified quartz sand aggregate 301~400 mesh is (1~3):(1~5):(3~5):(7~12):(5~15). This invention optimizes the use of modified quartz sand aggregates with different gradations. The combination of different particle sizes allows for better filling and compaction. The coarse modified quartz sand aggregates act as a skeleton, providing macroscopic strength and skeletal support, while the small modified quartz sand aggregates effectively fill the voids. This ensures the excellent mechanical properties of the quartz slab, while the high density also reduces its absorption rate. Furthermore, the good gradation ensures that the mixture has good flowability and plasticity during mixing and distribution, facilitating subsequent rolling and vibratory molding.

[0030] In one embodiment, in step S1, the first condition is: stirring at a speed of 100 r / min to 500 r / min for 30 min to 60 min.

[0031] In one embodiment, in step S2, the second condition is: stirring at a speed of 100 r / min to 500 r / min for 30 min to 60 min.

[0032] In one embodiment, in step S3, the different color pastes include color paste A with added black powder and color paste B with added yellow powder.

[0033] In one embodiment, in step S3, when adding black powder to prepare color paste A, the black powder accounts for 1% to 5% of the mass of color paste A. In step S3, when adding yellow powder to prepare color paste B, the yellow powder accounts for 1% to 5% of the mass of color paste B.

[0034] In one embodiment, in step S3, a portion of the mixture B is taken, which accounts for 10% to 20% of the total mass of the mixture B.

[0035] In one embodiment, in step S4, the process parameters for the rolling process are as follows: the first stage is processed at a frequency of 35Hz~37Hz for 10s~15s, the second stage is processed at a frequency of 39Hz~40Hz for 8s~10s, the third stage is processed at a frequency of 41Hz~42Hz for 8s~10s, and the fourth stage is processed at a frequency of 42Hz for 40s~50s.

[0036] In one embodiment, step S5 involves supplementing the dried pigment, which includes black powder, gray powder, and yellow powder. The amount of black powder, gray powder, and yellow powder added in this invention is appropriately supplemented according to the color setting of the model; the specific amounts added are not detailed here.

[0037] In one embodiment, the curing process is as follows: the temperature is increased to 60°C to 90°C at a rate of 3°C / min to 5°C / min, held for 10 to 20 minutes, and then increased to 100°C to 110°C at a rate of 1°C / min to 3°C / min, held for 30 to 50 minutes. This invention, by optimizing the curing process, helps to reduce uneven curing shrinkage, decrease internal stress, and promote the production of quartz slabs with superior surface quality.

[0038] The quartz slab obtained by the above scheme not only ensures its excellent mechanical properties, but also has significant weather resistance and texture, as well as a luxurious feel, meeting the aesthetic needs of high-end decoration.

[0039] The implementation scheme of the present invention will be described in detail below with reference to specific embodiments. The raw materials, reagents, etc. used in the embodiments that are not described in detail are all commercially available. Example 1:

[0040] A method for preparing a high-performance luxury quartz slab with natural texture includes the following steps: S1. According to the weight, 85 parts of modified quartz sand aggregate with different gradations, 7 parts of modified unsaturated polyester resin and 0.05 parts of rare earth polishing powder are stirred at 100 r / min for 60 min to obtain mixture A. The modified quartz sand aggregate is prepared as follows: 10 parts by weight of quartz sand aggregate are added to 9 parts by weight of a silane coupling agent precursor solution (obtained by mixing 3-aminopropyltriethoxysilane and ethanol in a weight ratio of 7:3), stirred for 15 minutes, filtered, and then 4 parts by weight of sodium phytate are added. The mixture is stirred at 100 r / min for 2 hours to obtain the modified quartz sand aggregate. The modified quartz sand aggregates with different gradations are as follows: the weight ratio of modified quartz sand aggregate 120 mesh, modified quartz sand aggregate 130 mesh, modified quartz sand aggregate 150 mesh, modified quartz sand aggregate 250 mesh, and modified quartz sand aggregate 350 mesh is 3:5:5:10:15. The modified unsaturated polyester resin is prepared as follows: 0.03 parts by weight of 2-hydroxy-4-n-octyloxybenzophenone and 0.02 parts by weight of dibutylhydroxytoluene are added to 10 parts of unsaturated polyester resin, and 0.02 parts by weight of dimethyl itaconic acid are added. The mixture is stirred at 95°C for 60 min, and then 0.03 parts by weight of polyvinyl butyral are added. The mixture is stirred for another 20 min to obtain the modified unsaturated polyester resin. S2. Add 8 parts of carboxymethyl cellulose and 2 parts of polyvinyl alcohol to the mixture A, stir at 100 r / min for 40 min, then add 0.07 parts of tert-butyl peroxide, and continue stirring for 15 min to obtain mixture B; S3. Take 10% of the total mass of the mixture B and divide it into two portions. Add 3% of black powder (based on the mass of color paste A) to one portion and stir to obtain color paste A. Add 2% of yellow powder (based on the mass of color paste B) to the other portion and stir evenly to obtain color paste B. S4. The remaining mixture B after step S3 is automatically laid on a flat mold frame lined with kraft paper and patterned strips by a robotic arm and rolled. The rolling process parameters are as follows: the first stage is processed at a frequency of 37Hz for 10s, the second stage is processed at a frequency of 40Hz for 10s, the third stage is processed at a frequency of 41Hz for 10s, and the fourth stage is processed at a frequency of 42Hz for 50s. S5. The pattern strip model from step S4 is slowly lifted out by a robotic arm, and the grooves of the original pattern strip are filled with color paste A and color paste B obtained in step S3, and dry pigment is sprinkled appropriately at the corresponding color positions. S6. After completing step S4, vibratory pressing is used to form the slab; S7. The slab is heated to 75°C at a rate of 3°C / min and held for 15 minutes. Then, it is heated to 100°C at a rate of 2°C / min and held for 35 minutes. After thickness determination, grinding and polishing, a high-performance luxury quartz slab with natural texture is obtained. Example 2:

[0041] A method for preparing a high-performance luxury quartz slab with natural texture includes the following steps: S1. According to the weight, 85 parts of modified quartz sand aggregate with different gradations, 8 parts of modified unsaturated polyester resin and 0.06 parts of rare earth polishing powder are stirred at 100 r / min for 60 min to obtain mixture A. The modified quartz sand aggregate is prepared as follows: 10 parts by weight of quartz sand aggregate are added to 10 parts by weight of a silane coupling agent precursor solution (obtained by mixing 3-aminopropyltriethoxysilane and ethanol in a weight ratio of 7:3), stirred for 15 minutes, filtered, and then 5 parts by weight of sodium phytate with a concentration of 10% are added. The mixture is stirred at 100 r / min for 2 hours to obtain the modified quartz sand aggregate. The modified quartz sand aggregates with different gradations are as follows: the weight ratio of modified quartz sand aggregate 120 mesh, modified quartz sand aggregate 130 mesh, modified quartz sand aggregate 150 mesh, modified quartz sand aggregate 250 mesh, and modified quartz sand aggregate 350 mesh is 3:5:5:10:15. The modified unsaturated polyester resin is prepared as follows: 0.03 parts by weight of 2-hydroxy-4-n-octyloxybenzophenone and 0.02 parts by weight of dibutylhydroxytoluene are added to 10 parts of unsaturated polyester resin, and 0.02 parts by weight of dimethyl itaconic acid are added. The mixture is stirred at 90°C for 60 min, and then 0.03 parts by weight of polyvinyl butyral are added. The mixture is stirred for another 20 min to obtain the modified unsaturated polyester resin. S2. Add 8 parts of carboxymethyl cellulose and 2 parts of polyvinyl alcohol to the mixture A, stir at 100 r / min for 40 min, then add 0.08 parts of tert-butyl peroxide, and continue stirring for 15 min to obtain mixture B; S3. Take 10% of the total mass of the mixture B and divide it into two portions. Add 3% of black powder (based on the mass of color paste A) to one portion and stir to obtain color paste A. Add 2% of yellow powder (based on the mass of color paste B) to the other portion and stir evenly to obtain color paste B. S4. The remaining mixture B after step S3 is automatically laid on a flat mold frame lined with kraft paper and patterned strips by a robotic arm and rolled. The rolling process parameters are as follows: the first stage is processed at a frequency of 37Hz for 10s, the second stage is processed at a frequency of 40Hz for 10s, the third stage is processed at a frequency of 41Hz for 10s, and the fourth stage is processed at a frequency of 42Hz for 50s. S5. The pattern strip model from step S4 is slowly lifted out by a robotic arm, and the grooves of the original pattern strip are filled with color paste A and color paste B obtained in step S3, and dry pigment is sprinkled appropriately at the corresponding color positions. S6. After completing step S4, vibratory pressing is used to form the slab; S7. The slab is heated to 80°C at a rate of 4°C / min and held for 10 min. Then, it is heated to 100°C at a rate of 2°C / min and held for 35 min. After thickness determination, grinding and polishing, a high-performance luxury quartz slab with natural texture is obtained. Example 3:

[0042] A method for preparing a high-performance luxury quartz slab with natural texture includes the following steps: S1. According to the weight, 88 parts of modified quartz sand aggregate with different gradations, 8 parts of modified unsaturated polyester resin and 0.07 parts of rare earth polishing powder are stirred at 100 r / min for 60 min to obtain mixture A. The modified quartz sand aggregate is prepared as follows: 10 parts by weight of quartz sand aggregate are added to 10 parts by weight of a silane coupling agent precursor solution (obtained by mixing 3-aminopropyltriethoxysilane and ethanol in a weight ratio of 7:3), stirred for 15 minutes, filtered, and then 5 parts by weight of sodium phytate with a concentration of 12% are added. The mixture is stirred at 100 r / min for 2 hours to obtain the modified quartz sand aggregate. The modified quartz sand aggregates with different gradations are as follows: the weight ratio of modified quartz sand aggregate 120 mesh, modified quartz sand aggregate 130 mesh, modified quartz sand aggregate 150 mesh, modified quartz sand aggregate 250 mesh, and modified quartz sand aggregate 350 mesh is 3:5:5:10:15. The modified unsaturated polyester resin is prepared as follows: 0.04 parts by weight of 2-hydroxy-4-n-octyloxybenzophenone and 0.01 parts by weight of dibutylhydroxytoluene are added to 10 parts of unsaturated polyester resin, and 0.03 parts by weight of dimethyl itaconic acid are added. The mixture is stirred at 95°C for 60 min, and then 0.03 parts by weight of polyvinyl butyral are added. The mixture is stirred for another 20 min to obtain the modified unsaturated polyester resin. S2. Add 8 parts of carboxymethyl cellulose and 2 parts of polyvinyl alcohol to the mixture A, stir at 100 r / min for 40 min, then add 0.07 parts of tert-butyl peroxide, and continue stirring for 15 min to obtain mixture B; S3. Take 10% of the total mass of the mixture B and divide it into two portions. Add 3% of black powder (based on the mass of color paste A) to one portion and stir to obtain color paste A. Add 2% of yellow powder (based on the mass of color paste B) to the other portion and stir evenly to obtain color paste B. S4. The remaining mixture B after step S3 is automatically laid on a flat mold frame lined with kraft paper and patterned strips by a robotic arm and rolled. The rolling process parameters are as follows: the first stage is processed at a frequency of 37Hz for 10s, the second stage is processed at a frequency of 40Hz for 10s, the third stage is processed at a frequency of 41Hz for 10s, and the fourth stage is processed at a frequency of 42Hz for 50s. S5. The pattern strip model from step S4 is slowly lifted out by a robotic arm, and the grooves of the original pattern strip are filled with color paste A and color paste B obtained in step S3, and dry pigment is sprinkled appropriately at the corresponding color positions. S6. After completing step S4, vibratory pressing is used to form the slab; S7. The slab is heated to 90°C at a rate of 5°C / min and held for 10 min. Then, it is heated to 100°C at a rate of 2°C / min and held for 30 min. After thickness determination, grinding and polishing, a high-performance luxury quartz slab with natural texture is obtained.

[0043] Comparative Example 1: The difference between Comparative Example 1 and Example 3 is that Comparative Example 1 uses the same batch of quartz sand aggregate, which is relatively uniform with an average particle size of 200 mesh. Otherwise, it is the same as Example 3.

[0044] Comparative Example 2: The difference between Comparative Example 2 and Example 3 is that sodium phytate was not added during the modification treatment of the quartz sand aggregate in Comparative Example 2, while the rest was the same as in Example 3.

[0045] Comparative Example 3: The difference between Comparative Example 3 and Example 3 is that the quartz sand aggregate in Comparative Example 3 was not modified, but otherwise it was the same as Example 1.

[0046] Comparative Example 4: The difference between Comparative Example 4 and Example 3 is that the unsaturated polyester resin added in Comparative Example 4 was not modified, but otherwise it was the same as Example 3.

[0047] Comparative Example 5: Compared with Example 3, Comparative Example 5 differs in that the rolling process parameters in Comparative Example 5 are 35Hz for 80s, while the rest are the same as in Example 3.

[0048] Comparative Example 6: Compared with Example 3, Comparative Example 6 differs in that the curing process in Comparative Example 6 is as follows: the temperature is increased to 100°C at a heating rate of 5°C / min, and the treatment is carried out for 40 minutes. The rest is the same as in Example 3.

[0049] I. The appearance of the high-performance luxury quartz slab samples with natural textures prepared in Examples 1-3 and the high-performance luxury quartz slab samples with natural textures prepared in Comparative Examples 1-6 was evaluated. The evaluation was mainly conducted by those skilled in the art through visual observation and recording. The results are shown in Table 1 below.

[0050] Table 1: Apparent Evaluation Example 1 The texture is clear, the colors are natural, and it has a luxurious feel. Example 2 The texture is clear, the colors are natural, and it has a luxurious feel. Example 3 The texture is clear, the colors are natural, and it has a luxurious feel. Comparative Example 1 The texture boundaries are partially blurred, resulting in poor texture. Comparative Example 2 The texture boundaries are partially blurred, and the overall quality is average. Comparative Example 3 The texture is partially blurred, the colors are smudged, and the overall quality is poor. Comparative Example 4 Dull colors and mediocre texture Comparative Example 5 The texture boundaries are partially blurred, resulting in poor texture. Comparative Example 6 Local defects at texture boundaries, resulting in poor texture. As can be seen from the data analysis in Table 1, the quartz slabs prepared in Examples 1-3 of the present invention have excellent texture effects, clear textures, and natural colors, and have excellent ornamental and application value, which is in line with the positioning of "luxury quartz slabs". In Comparative Example 1, using only quartz sand and the same preparation process, the density was not as good as in Example 3, causing the color paste to penetrate and spread during the application process, resulting in localized blurring of the texture and affecting the product's appearance and overall quality. Comparative Examples 2 and 3 both involved different modification treatments of the quartz sand, leading to products with inferior appearance compared to Example 3. This indicates that modifying the quartz sand aggregate significantly affects the penetration and adhesion of the color paste. In Comparative Example 4, the unsaturated polyester resin was not modified, but due to its cross-linking and toughening effects, it significantly affected the mechanical properties and the application of the color paste, resulting in a lower appearance quality than Example 3. In Comparative Example 5, the changed rolling process parameters affected the clarity of the texture distribution, indicating that the rolling process parameters have a certain impact on the application of the color paste. In Comparative Example 6, different curing process parameters resulted in slight pinhole defects and localized blurring of the texture, demonstrating that this application, through the setting of specific process parameters, helps to obtain quartz surfaces with clearer textures and more natural color transitions.

[0051] like Figure 1 As shown, Figure 1 This is a schematic diagram of a high-performance luxury quartz slab product with natural texture prepared in Example 1 of the present invention. Figure 1 It is evident that the optimized composition and process of this invention result in a texture with a "vein-like" quality. The texture is clear, the transition is natural, and there is no blurring or smudging. It uses neutral and elegant colors such as light gray, off-white, and warm yellow as a base, balancing modern simplicity and luxury styles. The color layering is excellent and meets the requirements for high-end quartz slabs.

[0052] II. Performance tests were conducted on the high-performance luxury quartz slab samples with natural textures prepared in Examples 1-3 and the high-performance luxury quartz slab samples with natural textures prepared in Comparative Examples 1-6, referring to standards GB / T9966.1-9966.8-2001. The results are shown in Table 2 below.

[0053] Table 2: Performance Test Results Example 1 7.1 0.05 42 169 Example 2 7.2 0.04 45 170 Example 3 7.3 0.02 46 172 Comparative Example 1 6.8 0.12 36 152 Comparative Example 2 6.9 0.10 35 150 Comparative Example 3 6.5 0.18 31 143 Comparative Example 4 6.7 0.09 38 159 Comparative Example 5 7.0 0.04 40 164 Comparative Example 6 6.8 0.13 39 160 Analysis of the data in Table 2 shows that the present invention, through optimization of composition and process, can obtain quartz plates with excellent properties in all aspects. Compared with Example 3, Comparative Example 1 uses quartz sand of a single specification, which has a lower density than Example 3, resulting in a higher water absorption rate and reduced strength during the preparation process. In Comparative Examples 2 and 3, no chemical groups were introduced into the surface of the quartz sand aggregate, and there was indeed an interaction between the silane coupling agent and sodium phytate, resulting in a weaker interfacial bonding force than Example 3, leading to a decrease in mechanical properties. In Comparative Example 4, the unsaturated polyester resin was not modified and lacked crosslinking and toughening effects, which affected the mechanical properties of the quartz plate. In Comparative Examples 5 and 6, the process changes affected the density of the quartz plate, thus affecting its mechanical properties.

[0054] The above description is merely a preferred embodiment for explaining the present invention and is not intended to limit the present invention in any way. Therefore, any modifications or changes made to the present invention under the same inventive spirit should still be included within the scope of protection intended by the present invention.

Claims

1. A method for preparing a high-performance luxury quartz slab with natural texture, characterized in that, Includes the following steps: S1. Modified quartz sand aggregates of different gradations, binders and brightening agents are stirred and treated under the first condition to obtain mixture A; S2. Carboxymethyl cellulose and polyvinyl alcohol are added to the mixture A, stirred under the second condition, then a curing agent is added, and stirring is continued to obtain mixture B; S3. Take a portion of the mixture B to prepare texture color paste, stir and process it to obtain different color pastes; S4. The remaining mixture B after step S3 is automatically laid on a flat mold frame lined with kraft paper and patterned stripes by a robotic arm and then rolled. S5. The pattern strip model from step S4 is slowly lifted out by a robotic arm, and the grooves of the original pattern strip are filled with the color paste obtained in step S3 by the robotic arm, and dry colorant is added. S6. After completing step S4, vibratory pressing is used to form the slab; S7. The slab is cured and then subjected to thickness determination, grinding and polishing to obtain a high-performance luxury quartz slab with natural texture.

2. The preparation method according to claim 1, characterized in that, The quartz plate comprises the following raw materials in parts by weight: 80 to 90 parts modified quartz sand aggregate, 5 to 8 parts binder, 0.03 to 1 part brightening agent, 7 to 12 parts carboxymethyl cellulose, 1 to 3 parts polyvinyl alcohol, and 0.03 to 1 part curing agent.

3. The preparation method according to claim 2, characterized in that, The modified quartz sand aggregate is prepared by adding quartz sand aggregate to a silane coupling agent precursor solution and stirring for 15 min to 30 min, then adding sodium phytate and stirring at a speed of 50 r / min to 300 r / min for 1 h to 3 h to obtain the modified quartz sand aggregate.

4. The preparation method according to claim 2, characterized in that, The adhesive is a modified unsaturated polyester resin, and the viscosity of the unsaturated polyester resin is 2.7 Pa·s to 2.8 Pa·s.

5. The preparation method according to claim 4, characterized in that, The method for preparing the modified unsaturated polyester resin is as follows: 2-Hydroxy-4-n-octyloxybenzophenone and dibutylhydroxytoluene were added to an unsaturated polyester resin, along with dimethyl itaconic acid. The mixture was stirred at 80℃~100℃ for 40min~120min, and then polyvinyl butyral was added. The mixture was stirred for another 20min~30min to obtain the modified unsaturated polyester resin.

6. The preparation method according to claim 2, characterized in that, The brightening agent is a rare earth polishing powder.

7. The preparation method according to claim 2, characterized in that, In step S1, the gradations of the modified quartz sand aggregates with different gradations are as follows: the weight ratio of modified quartz sand aggregate 100~120 mesh, modified quartz sand aggregate 121~150 mesh, modified quartz sand aggregate 151~200 mesh, modified quartz sand aggregate 201~300 mesh, and modified quartz sand aggregate 301~400 mesh is (1~3):(1~5):(3~5):(7~12):(5~15).

8. The preparation method according to claim 1, characterized in that, In step S3, the different color pastes include color paste A with added black powder and color paste B with added yellow powder.

9. The preparation method according to claim 1, characterized in that, In step S4, the process parameters for the rolling process are as follows: the first stage is processed at a frequency of 35Hz~37Hz for 10s~15s, the second stage is processed at a frequency of 39Hz~40Hz for 8s~10s, the third stage is processed at a frequency of 41Hz~42Hz for 8s~10s, and the fourth stage is processed at a frequency of 42Hz for 40s~50s.

10. The preparation method according to claim 1, characterized in that, In step S5, the curing process is as follows: the temperature is increased to 60℃~90℃ at a rate of 3℃ / min~5℃ / min, and held for 10min~20min, then the temperature is increased to 100℃~110℃ at a rate of 1℃ / min~3℃ / min, and held for 30min~50min.

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