Multi-coating weak-solvent matte painting material canvas and production method thereof

Abstract

The invention relates to the technical field of canvas production, in particular to a multi-coating eco-solvent matte painting material canvas and a production method thereof.The multi-coating eco-solvent matte painting material canvas comprises the following production steps that S1, dried and shaped white gray cloth is put into a drying oven to be dried and shaped, and the multi-coating eco-solvent matte painting material canvas is put into a drying oven to be dried and shaped; on special equipment for surface treatment, one surface is subjected to high-temperature surface treatment at 300 DEG C or above for the first time, and the surface is collectively called a front surface. The printing ink has the advantages that the printing color is good, the reducing performance is good, the drying speed is high, the color is full and uniform, the color gamut transition is natural, the ink absorption layer is produced through pure water-based environment-friendly emulsion polymerization, the surface of the ink absorption layer also has the stain-resistant and scratch-resistant performance in cooperation with special functional auxiliaries, the vertical stiffness is excellent, edge curling and edge warping are avoided, a base material is flexible and powerful, wrinkling marks are not prone to occurring, and the printing ink has the good application prospect. And the coating has strong bonding force with the gray cloth, and is tear-resistant and crack-resistant.

Description

Technical Field

[0001] This invention relates to the field of canvas production technology, specifically to a multi-coated, low-solvent matte inkjet canvas and its production method. Background Technology

[0002] In recent years, in the field of high-definition photo printing, whether for indoor and outdoor advertising exhibitions or home and office decoration, the market has placed higher demands on material manufacturers in terms of material style selection and output image size. Among the many printing materials, especially high-definition photo printing materials, the first problem is size. Due to the limitations of raw materials and production equipment, the width of the produced materials is relatively narrow, mostly within 1.52 meters. Extremely special materials are also within 1.8 meters in width. However, in recent years, the width of some materials has shown a significant upward trend, with some reaching around 2.2 meters. But such sizes still cannot meet market demand, nor can they completely solve the problems that exist in the practical application of the materials.

[0003] Existing canvas substrates inevitably have seams when spliced ​​together, causing misalignment of the image. Furthermore, their surfaces are too flat, failing to reproduce the original image in a more three-dimensional and realistic way. Besides the inherent advantages and disadvantages of the substrate itself, the most crucial factor is its printing performance, specifically the accuracy of color reproduction. Poor color reproduction, coupled with poor drape leading to curling and warping, and substrate instability, makes improving and refining these aspects a pressing issue. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-coated, low-solvent matte inkjet printing material canvas and its production method, in order to solve the problems mentioned in the background art. Existing canvas substrates will inevitably have seams when spliced, causing misalignment of the image. At the same time, their surfaces are too flat, making it impossible to reproduce the original image in a more three-dimensional and realistic way. In addition to the advantages and disadvantages of the substrate itself, the most important indicator is its printing performance, that is, the reproduction of various colors in the image. The quality of color reproduction varies. In addition, poor drape will cause curling and warping, and the substrate is unstable.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-coated, low-solvent matte inkjet canvas, comprising the multi-coated, low-solvent matte inkjet canvas, and the production steps of the multi-coated, low-solvent matte inkjet canvas are as follows: S1. Take the dried and shaped white fabric and put it on a special surface treatment equipment. First, perform a high-temperature surface treatment of more than 300 degrees on one side. This side is referred to as the front side. The untreated side is referred to as the back side. After the high-temperature treatment, the surface of the front side of the fabric will become flat and smooth, and the surface of the finished product will be smoother. S2. For the white fabric front side, apply the first coat of whitening agent. Roll up the white fabric that has already been treated on the front side and place it face up on the roll-up station of the intelligent coating machine. When the temperature in the oven reaches the preset temperature, start the acceleration button. The substrate will move smoothly towards the direction of the squeegee application under the action of multiple parallel guide rollers. The substrate will arrive at the coating table of the precision coating head at a speed of 25 meters per minute. As the substrate continues to move forward, the paint added to the front side of the substrate will be continuously carried away by the substrate. After passing through the 4.0 special squeegee, the squeegee will squeeze and smooth the paint on the surface of the substrate. At the same time, the excess paint will be scraped off by the squeegee and blocked in front of the squeegee for reuse. S3. After being scraped, the substrate surface has been coated with a uniform layer of wet adhesive. The next step is to directly enter the high-temperature oven for dehumidification and drying. The substrate will be dried at a high temperature of 50-150 degrees Celsius for 30 seconds in the 27-meter-long oven. After drying, the substrate will have a certain degree of flexibility, a snow-white and smooth surface, and clear texture. At the same time, the substrate will no longer be translucent or breathable. S4. After exiting the oven, the substrate surface has been dried. The coating surface needs to undergo a special surface treatment to improve the substrate's flexibility and make the surface texture more uniform. Then, a rapid surface cooling treatment is performed. After that, the substrate will be slowly rolled onto the spindle, ready for the next coating process. S5. Apply a second base coat to the front of the substrate. The purpose of this coat is to increase the weight, stiffness, and opacity of the product. If the weight of the adhesive applied is insufficient, the fabric will arch during printing, which will seriously damage the printer head. This process of applying the second base coat to the front of the substrate results in a low-solvent matte finish product, which is more suitable for wide-format decorative paintings and framed oil paintings. This is because the surface of the product will be smoother and more suitable for high-definition inkjet printing. It also helps with the ink absorption coating on the surface, resulting in better color reproduction. S6. Apply the second layer of base coat to the back of the substrate. This process produces a mild solvent matte finish product, which is suitable for wide-format seamless wall coverings, wide-format personalized printed curtains, and wide-format printing consumables for indoor and outdoor exhibitions. Whether the base coat is applied to the front as the second coat or to the back as the first coat, the coating formula and coating process are the same. S7. Coating the substrate with the front side facing up is equivalent to the second cut of the front coating. If the customer is making seamless wall coverings or wide-width personalized printed curtains, coating the substrate with the front side facing down is equivalent to the first cut of the back coating. Place the roll of substrate on the coating machine station, making sure it is placed with the front side facing up. After starting the machine, press the acceleration button, and the entire substrate will move horizontally towards the precision coating head. S8. After the substrate enters the material trough of the coating station, the coating will quickly wet the surface of the substrate. Affected by the movement of the substrate, the coating will continuously roll backward and continuously wet the new substrate surface. When the substrate surface passes the bottom of the 4.0 scraper, it will be coated with a uniform and thin layer of wet glue due to the squeezing and scraping effect of the scraper. The substrate with wet glue on the surface will directly enter the 50-170 degree high temperature oven. After 40 seconds of high temperature drying, the substrate will exit the 27-meter long intelligent temperature-controlled oven. Under the action of the main winding power traction, after the substrate passes through the guide roller, it will first undergo a 4-meter long rapid cooling treatment, and then be directly wound into a large roll by the power shaft core, waiting for the next process coating. S9. Applying a mild solvent-based matte ink-absorbing layer to the front of the substrate is the most crucial step in the entire coating process, whether producing wide-format wallcoverings and large-format custom curtains with back coating, or mild solvent-based matte canvases for handicrafts and decorative paintings without back coating. It is also the final coating layer for the entire product. The semi-finished substrate, which has already undergone multiple coating processes, is placed face up at the designated station. Following the normal startup procedure, the coating process begins. As usual, the substrate gradually moves forward at a constant speed along the balance guide roller, entering the feeding area of ​​the precision coating head for application of adhesive. The substrate enters the precision coating head and the coating station's material tank. A specially formulated weak-solvent matte ink-absorbing coating layer continuously tumbles backward as the substrate moves forward, rapidly covering its surface. After being scraped by a 4.0mm doctor blade, the substrate surface is coated with a uniform layer of the weak-solvent matte ink-absorbing layer. It then enters a 27-meter-long high-temperature oven where it undergoes 50 seconds of intelligent high-temperature drying at 150-180 degrees Celsius. After exiting the oven, the substrate undergoes two rapid surface cooling treatments before being automatically rolled into large rolls, then individually packaged and sold.

[0006] A method for producing a multi-coated, low-solvent matte inkjet canvas: including a base whitening layer coating, a base weighting layer coating, and a low-solvent matte ink-absorbing layer coating, wherein the base whitening layer coating is applied sequentially to the outer surface of the substrate.

[0007] Preferably, the formulation of the primer whitening layer coating is as follows: Water: 10-15 kg Natural stone powder A (titanium dioxide): 5-8 kg Dispersant: 0.3-0.5 kg Defoamer: 0.2-0.5 kg PVA adhesive: 5-8 kg Natural stone powder E (light calcium carbonate): 12-16 kg Natural stone powder D (1250 mesh heavy calcium carbonate): 12-18 kg Natural stone powder C (600 mesh heavy calcium carbonate): 10-18 kg Natural stone powder B (400 mesh heavy calcium carbonate): 5-15 kg VAE Emulsion A: 20-30 kg VAE Emulsion B: 18-28 kg Acrylic emulsion: 3-8 kg Whitening agent: 0.15-0.45 kg Plasticizer: 1.5-2.5 kg Surfactant: 0.3-0.4 kg.

[0008] Preferably, the formulation process for the base whitening coating is as follows: S1. In the dispersion tank of the high-speed mixer, first add the required amount of water. After starting the motor, slowly increase the speed to 1440 rpm. Then, add the dispersant, defoamer, and surfactant using a streamlined addition method. After each addition, stir at high speed for 5 minutes before adding another additive. S2. After the dispersion time of the last additive is reached, slowly add natural stone powder A (titanium dioxide), and after high-speed dispersion for 40 minutes, slowly add natural stone powder E (light calcium carbonate), and then disperse at high speed for 30 minutes. After that, reduce the motor speed to 800 rpm. S3. Next, pour the PVA glue into the bucket. After mixing at medium speed for 10 minutes, increase the speed to 1440 rpm. Then, slowly add natural stone powder B (400 mesh heavy calcium carbonate). After dispersing at high speed for 10 minutes, reduce the speed to 800 rpm. Then, slowly pour the prepared VAE emulsions A and B, as well as the acrylic emulsion, into the bucket. After all three emulsions are added, continue mixing for 10 minutes. Then, increase the motor speed to 1440 rpm and slowly add natural stone powder C (600 mesh heavy calcium carbonate) and natural stone powder D (1250 mesh heavy calcium carbonate). Then, continue dispersing at high speed for 90 minutes. S4. Then reduce the motor speed to 800 rpm, add the plasticizer and stir for 10 minutes, then add the whitening agent and continue mixing for 20 minutes. Then filter with a special filter screen and put it directly into a small bucket for use on the machine.

[0009] Preferably, the formulation of the base layer coating is as follows: Water: 11-15 kg Dispersant (5040): 0.2-0.4 kg Defoamer (NXZ): 0.3-0.5 kg PVA adhesive (1799): 16-28 kg Natural stone powder A (titanium dioxide): 5-8 kg Natural stone powder B (600 mesh heavy calcium carbonate): 26-35 kg Natural stone powder C (talc): 10-15 kg VAE Emulsion A (707): 22-25 kg VAE Emulsion B (709): 10-15 kg Crosslinked emulsion (305): 1-2 kg Anti-shrinkage agent (stiffening agent): 0.3-0.4 kg.

[0010] Preferably, the formulation process for the base layer weight-adding coating is as follows: S1. In the dispersion tank of the high-speed mixer, first pour in a certain amount of water, start the motor, and then increase the motor speed to 1440 rpm. Then add the dispersant in a streamlined manner. After 5 minutes, add the defoamer in the same way. S2. After the defoamer is dispersed at high speed for 5 minutes, slowly add natural stone powder A (titanium dioxide). After adding, disperse at high speed for 40 minutes, then reduce the motor speed to 800 rpm, pour PVA glue into the bucket, stir for 10 minutes, then increase the motor speed to 1440 rpm, and slowly add natural stone powder B (600 mesh heavy calcium carbonate), and continue to disperse at high speed for 40 minutes. S3. Then reduce the motor speed to 800 rpm, add VAE emulsion A (707) first, stir for 20 minutes, then increase the speed to 1440 rpm, slowly add natural stone powder C (talc), disperse at high speed for 30 minutes, then reduce the speed to 800 rpm, then pour in VAE emulsion B (709), and stir at medium speed for 20 minutes; After 20 minutes, add the cross-linked emulsion (305) and stir for 10 minutes. Finally, add the anti-shrinkage agent (stiffening agent) slowly in a streamlined manner and stir continuously for 60 minutes. Then, filter with a special filter screen and directly put it into a small bucket for use in the machine.

[0011] The preferred formulation and process for the nano-dispersion are as follows; Water: 70-100 kg Dispersant: 0.3-0.5 kg Silica: 10-20 kg Silica: 10-20 kg Nano-adsorbent: 10-20 kg; Nano-dispersion preparation process: After putting water into the tank, turn on the mixer and slowly increase the speed to 1440 rpm. Then, add the dispersant in a streamlined manner. After all the dispersant has been added, continue to stir at high speed for 15 minutes. Then, slowly add the silica, silica, and nano-adsorbent in sequence. After all the dispersant has been added, continue to disperse at high speed for 60 minutes before stopping the machine and waiting for the next step of coating preparation.

[0012] Preferably, the weak solvent matte ink-absorbing layer has the following formulation: Acrylic emulsion A (401): 50-80 kg Acrylic emulsion B: (5065) 20-30 kg Nano-dispersion: 30-50 kg Surfactant A (955): 0.3-0.5 kg Surfactant B (K5): 0.3-0.5 kg Defoamer: 0.3-0.5 kg Thickener: 0.3-0.5 kg Crosslinking agent: 0.2-0.5 kg.

[0013] Preferably, the formulation process for the weak solvent matte ink-absorbing layer coating is as follows: S1. First, pour acrylic emulsion A (401) into the bucket, then increase the speed of the mixer to 800 rpm, and then slowly pour in acrylic emulsion B (5065). After that, add the defoamer in a streamlined manner. After adding, continue to mix and stir for 10 minutes. S2. Then slowly add surfactant A (955), and after 10 minutes slowly add surfactant B (K5). Then increase the motor speed to 1440 rpm, and slowly pour in the pre-prepared nano dispersion, and continue high-speed dispersion for 60 minutes. S3. Then reduce the motor speed to 800 rpm, and slowly add the crosslinking agent in a streamlined manner. After stirring for 10 minutes, slowly add the thickener. After all the thickener has been added, continue stirring for another 30 minutes. Then stop the machine and filter, ready for use.

[0014] Preferably, the defoamer has a composition of 0.2 kg.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This multi-coated, low-solvent matte inkjet printing material canvas and its production method produce excellent printing colors, superior color reproduction, fast drying speed, rich and uniform colors, and natural color gamut transitions. The ink-absorbing layer is produced using pure water-based environmentally friendly emulsion polymerization, combined with special functional additives. The surface also has stain and scratch resistance, excellent drape, and does not curl or warp at the edges. The substrate is flexible and strong, not prone to wrinkles, and the coating has strong adhesion to the canvas, making it tear-resistant and crack-resistant. Whether it is framed and glued or hung in the air, there will be no frame collapse, dead wrinkles, or reverse curling.

[0016] 2. This multi-coated, low-solvent matte inkjet printing canvas and its production method offer moderate matte finish and excellent weather resistance. Extensive experimentation has been conducted to study the reflection of different colors at varying gloss levels, resulting in a matte finish that best reflects the colors. This low-solvent matte synthetic fiber inkjet printing canvas is not only widely used in the traditional decorative painting industry but has also been applied to many emerging industries, such as personalized wardrobes, sofas, and clothing. Furthermore, export orders are increasing, showing a significant upward trend each year. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] One embodiment provided by the present invention: A multi-coated, low-solvent matte inkjet printing canvas, comprising the following production steps: S1. Take the dried and shaped white fabric and put it on a special surface treatment equipment. First, perform a high-temperature surface treatment of more than 300 degrees on one side. This side is referred to as the front side. The untreated side is referred to as the back side. After the high-temperature treatment, the surface of the front side of the fabric will become flat and smooth, and the surface of the finished product will be smoother. S2. For the white fabric front side, apply the first coat of whitening agent. Roll up the white fabric that has already been treated on the front side and place it face up on the roll-up station of the intelligent coating machine. When the temperature in the oven reaches the preset temperature, start the acceleration button. The substrate will move smoothly towards the direction of the squeegee application under the action of multiple parallel guide rollers. The substrate will arrive at the coating table of the precision coating head at a speed of 25 meters per minute. As the substrate continues to move forward, the paint added to the front side of the substrate will be continuously carried away by the substrate. After passing through the 4.0 special squeegee, the squeegee will squeeze and smooth the paint on the surface of the substrate. At the same time, the excess paint will be scraped off by the squeegee and blocked in front of the squeegee for reuse. S3. After being scraped, the substrate surface has been coated with a uniform layer of wet adhesive. The next step is to directly enter the high-temperature oven for dehumidification and drying. The substrate will be dried at a high temperature of 50-150 degrees Celsius for 30 seconds in the 27-meter-long oven. After drying, the substrate will have a certain degree of flexibility, a snow-white and smooth surface, and clear texture. At the same time, the substrate will no longer be translucent or breathable. S4. After exiting the oven, the substrate surface has been dried. The coating surface needs to undergo a special surface treatment to improve the substrate's flexibility and make the surface texture more uniform. Then, a rapid surface cooling treatment is performed. After that, the substrate will be slowly rolled onto the spindle, ready for the next coating process. S5. Apply a second base coat to the front of the substrate. The purpose of this coat is to increase the weight, stiffness, and opacity of the product. If the weight of the adhesive applied is insufficient, the fabric will arch during printing, which will seriously damage the printer head. This process of applying the second base coat to the front of the substrate results in a low-solvent matte finish product, which is more suitable for wide-format decorative paintings and framed oil paintings. This is because the surface of the product will be smoother and more suitable for high-definition inkjet printing. It also helps with the ink absorption coating on the surface, resulting in better color reproduction. S6. Apply the second layer of base coat to the back of the substrate. This process produces a mild solvent matte finish product, which is suitable for wide-format seamless wall coverings, wide-format personalized printed curtains, and wide-format printing consumables for indoor and outdoor exhibitions. Whether the base coat is applied to the front as the second coat or to the back as the first coat, the coating formula and coating process are the same. S7. Coating the substrate with the front side facing up is equivalent to the second cut of the front coating. If the customer is making seamless wall coverings or wide-width personalized printed curtains, coating the substrate with the front side facing down is equivalent to the first cut of the back coating. Place the roll of substrate on the coating machine station, making sure it is placed with the front side facing up. After starting the machine, press the acceleration button, and the entire substrate will move horizontally towards the precision coating head. S8. After the substrate enters the material trough of the coating station, the coating will quickly wet the surface of the substrate. Affected by the movement of the substrate, the coating will continuously roll backward and continuously wet the new substrate surface. When the substrate surface passes the bottom of the 4.0 scraper, it will be coated with a uniform and thin layer of wet glue due to the squeezing and scraping effect of the scraper. The substrate with wet glue on the surface will directly enter the 50-170 degree high temperature oven. After 40 seconds of high temperature drying, the substrate will exit the 27-meter long intelligent temperature-controlled oven. Under the action of the main winding power traction, after the substrate passes through the guide roller, it will first undergo a 4-meter long rapid cooling treatment, and then be directly wound into a large roll by the power shaft core, waiting for the next process coating. S9. Applying a mild solvent-based matte ink-absorbing layer to the front of the substrate is the most crucial step in the entire coating process, whether producing wide-format wallcoverings and large-format custom curtains with back coating, or mild solvent-based matte canvases for handicrafts and decorative paintings without back coating. It is also the final coating layer for the entire product. The semi-finished substrate, which has already undergone multiple coating processes, is placed face up at the designated station. Following the normal startup procedure, the coating process begins. As usual, the substrate gradually moves forward at a constant speed along the balance guide roller, entering the feeding area of ​​the precision coating head for application of adhesive. The substrate enters the precision coating head and the coating station's material tank. A specially formulated weak-solvent matte ink-absorbing coating layer continuously tumbles backward as the substrate moves forward, rapidly covering its surface. After being scraped by a 4.0mm doctor blade, the substrate surface is coated with a uniform layer of the weak-solvent matte ink-absorbing layer. It then enters a 27-meter-long high-temperature oven where it undergoes 50 seconds of intelligent high-temperature drying at 150-180 degrees Celsius. After exiting the oven, the substrate undergoes two rapid surface cooling treatments before being automatically rolled into large rolls, then individually packaged and sold.

[0019] A method for producing a multi-coated, low-solvent matte inkjet canvas: including a base whitening layer coating, a base weighting layer coating, and a low-solvent matte ink-absorbing layer coating, wherein the base whitening layer coating is applied sequentially to the outer surface of the substrate.

[0020] The formula for the primer whitening layer paint is as follows: Water: 12-14 kg Natural stone powder A (titanium dioxide): 6-8 kg Dispersant: 0.35-0.45 kg Defoamer: 0.25-0.45 kg PVA adhesive: 6-7 kg Natural stone powder E (light calcium carbonate): 14-15 kg Natural stone powder D (1250 mesh heavy calcium carbonate): 13-16 kg Natural stone powder C (600 mesh heavy calcium carbonate): 11-17 kg Natural stone powder B (400 mesh heavy calcium carbonate): 6-10 kg VAE Emulsion A: 25-28 kg VAE Emulsion B: 20-25 kg Acrylic emulsion: 5-6 kg Whitening agent: 0.25-0.35 kg Plasticizer: 2-2.35 kg Surfactant: 0.35-0.38 kg.

[0021] The preparation process for the base whitening coating is as follows: S1. In the dispersion tank of the high-speed mixer, first add the required amount of water. After starting the motor, slowly increase the speed to 1440 rpm. Then, add the dispersant, defoamer, and surfactant using a streamlined addition method. After each addition, stir at high speed for 5 minutes before adding another additive. S2. After the dispersion time of the last additive is reached, slowly add natural stone powder A (titanium dioxide), and after high-speed dispersion for 40 minutes, slowly add natural stone powder E (light calcium carbonate), and then disperse at high speed for 30 minutes. After that, reduce the motor speed to 800 rpm. S3. Next, pour the PVA glue into the bucket. After mixing at medium speed for 10 minutes, increase the speed to 1440 rpm. Then, slowly add natural stone powder B (400 mesh heavy calcium carbonate). After dispersing at high speed for 10 minutes, reduce the speed to 800 rpm. Then, slowly pour the prepared VAE emulsions A and B, as well as the acrylic emulsion, into the bucket. After all three emulsions are added, continue mixing for 10 minutes. Then, increase the motor speed to 1440 rpm and slowly add natural stone powder C (600 mesh heavy calcium carbonate) and natural stone powder D (1250 mesh heavy calcium carbonate). Then, continue dispersing at high speed for 90 minutes. S4. Then reduce the motor speed to 800 rpm, add the plasticizer and stir for 10 minutes, then add the whitening agent and continue mixing for 20 minutes. Then filter with a special filter screen and put it directly into a small bucket for use on the machine.

[0022] The formula for the base layer weight-adding coating is as follows: Water: 12-15 kg Dispersant (5040): 0.3-0.4 kg Defoamer (NXZ): 0.4-0.5 kg PVA adhesive (1799): 18-25 kg Natural stone powder A (titanium dioxide): 6-8 kg Natural stone powder B (600 mesh heavy calcium carbonate): 28-30 kg Natural stone powder C (talc): 11-14 kg VAE Emulsion A (707): 23-25 ​​kg VAE Emulsion B (709): 11-14 kg Crosslinked emulsion (305): 1.5-2 kg Anti-shrinkage agent (stiffening agent): 0.35-0.4 kg.

[0023] The preparation process for the base coat / weight-adding coating is as follows: S1. In the dispersion tank of the high-speed mixer, first pour in a certain amount of water, start the motor, and then increase the motor speed to 1440 rpm. Then add the dispersant in a streamlined manner. After 5 minutes, add the defoamer in the same way. S2. After the defoamer is dispersed at high speed for 5 minutes, slowly add natural stone powder A (titanium dioxide). After adding, disperse at high speed for 40 minutes, then reduce the motor speed to 800 rpm, pour PVA glue into the bucket, stir for 10 minutes, then increase the motor speed to 1440 rpm, and slowly add natural stone powder B (600 mesh heavy calcium carbonate), and continue to disperse at high speed for 40 minutes. S3. Then reduce the motor speed to 800 rpm, add VAE emulsion A (707) first, stir for 20 minutes, then increase the speed to 1440 rpm, slowly add natural stone powder C (talc), disperse at high speed for 30 minutes, then reduce the speed to 800 rpm, then pour in VAE emulsion B (709), and stir at medium speed for 20 minutes; After 20 minutes, add the cross-linked emulsion (305) and stir for 10 minutes. Finally, add the anti-shrinkage agent (stiffening agent) slowly in a streamlined manner and stir continuously for 60 minutes. Then, filter with a special filter screen and directly put it into a small bucket for use in the machine.

[0024] The formulation and process of the nano-dispersion are as follows; Water: 80-95 kg Dispersant: 0.35-0.45 kg Silica: 15-20 kg Silica: 15-20 kg Nano-adsorbent: 15-18 kg; Nano-dispersion preparation process: After putting water into the tank, turn on the mixer and slowly increase the speed to 1440 rpm. Then, add the dispersant in a streamlined manner. After all the dispersant has been added, continue to stir at high speed for 15 minutes. Then, slowly add the silica, silica, and nano-adsorbent in sequence. After all the dispersant has been added, continue to disperse at high speed for 60 minutes before stopping the machine and waiting for the next step of coating preparation.

[0025] The formulation of the mild solvent matte ink-absorbing layer is as follows: Acrylic emulsion A (401): 55-80 kg Acrylic emulsion B: (5065) 22-30 kg Nano-dispersion: 35-50 kg Surfactant A (955): 0.35-0.5 kg Surfactant B (K5): 0.35-0.5 kg Defoamer: 0.35-0.5 kg Thickener: 0.35-0.5 kg Crosslinking agent: 0.3-0.5 kg.

[0026] The formulation process for a mild solvent-based matte ink-absorbing coating is as follows: S1. First, pour acrylic emulsion A (401) into the bucket, then increase the speed of the mixer to 800 rpm, and then slowly pour in acrylic emulsion B (5065). After that, add the defoamer in a streamlined manner. After adding, continue to mix and stir for 10 minutes. S2. Then slowly add surfactant A (955), and after 10 minutes slowly add surfactant B (K5). Then increase the motor speed to 1440 rpm, and slowly pour in the pre-prepared nano dispersion, and continue high-speed dispersion for 60 minutes. S3. Then reduce the motor speed to 800 rpm, and slowly add the crosslinking agent in a streamlined manner. After stirring for 10 minutes, slowly add the thickener. After all the thickener has been added, continue stirring for another 30 minutes. Then stop the machine and filter, ready for use.

[0027] The defoamer consists of 0.2 kg of ingredients.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A multi-coated, low-solvent matte inkjet canvas, comprising a multi-coated, low-solvent matte inkjet canvas, characterized in that: The production steps for multi-coated, solvent-free matte inkjet canvas are as follows: S1. Take the dried and shaped white fabric and put it on a special surface treatment equipment. First, perform a high-temperature surface treatment of more than 300 degrees on one side. This side is referred to as the front side. The untreated side is referred to as the back side. After the high-temperature treatment, the surface of the front side of the fabric will become flat and smooth, and the surface of the finished product will be smoother. S2. For the white fabric front side, apply the first coat of whitening agent. Roll up the white fabric that has already been treated on the front side and place it face up on the roll-up station of the intelligent coating machine. When the temperature in the oven reaches the preset temperature, start the acceleration button. The substrate will move smoothly towards the direction of the squeegee application under the action of multiple parallel guide rollers. The substrate will arrive at the coating table of the precision coating head at a speed of 25 meters per minute. As the substrate continues to move forward, the paint added to the front side of the substrate will be continuously carried away by the substrate. After passing through the 4.0 special squeegee, the squeegee will squeeze and smooth the paint on the surface of the substrate. At the same time, the excess paint will be scraped off by the squeegee and blocked in front of the squeegee for reuse. S3. After being scraped, the substrate surface has been coated with a uniform layer of wet adhesive. The next step is to directly enter the high-temperature oven for dehumidification and drying. The substrate will be dried at a high temperature of 50-150 degrees Celsius for 30 seconds in the 27-meter-long oven. After drying, the substrate will have a certain degree of flexibility, a snow-white and smooth surface, and clear texture. At the same time, the substrate will no longer be translucent or breathable. S4. After exiting the oven, the substrate surface has been dried. The coating surface needs to undergo a special surface treatment to improve the substrate's flexibility and make the surface texture more uniform. Then, a rapid surface cooling treatment is performed. After that, the substrate will be slowly rolled onto the spindle, ready for the next coating process. S5. Apply a second base coat to the front of the substrate. The purpose of this coat is to increase the weight, stiffness, and opacity of the product. If the weight of the adhesive applied is insufficient, the fabric will arch during printing, which will seriously damage the printer head. This process of applying the second base coat to the front of the substrate results in a low-solvent matte finish product, which is more suitable for wide-format decorative paintings and framed oil paintings. This is because the surface of the product will be smoother and more suitable for high-definition inkjet printing. It also helps with the ink absorption coating on the surface, resulting in better color reproduction. S6. Apply the second layer of base coat to the back of the substrate. This process produces a mild solvent matte finish product, which is suitable for wide-format seamless wall coverings, wide-format personalized printed curtains, and wide-format printing consumables for indoor and outdoor exhibitions. Whether the base coat is applied to the front as the second coat or to the back as the first coat, the coating formula and coating process are the same. S7. Coating the substrate with the front side facing up is equivalent to the second cut of the front coating. If the customer is making seamless wall coverings or wide-width personalized printed curtains, coating the substrate with the front side facing down is equivalent to the first cut of the back coating. Place the roll of substrate on the coating machine station, making sure it is placed with the front side facing up. After starting the machine, press the acceleration button, and the entire substrate will move horizontally towards the precision coating head. S8. After the substrate enters the material trough of the coating station, the coating will quickly wet the surface of the substrate. Affected by the movement of the substrate, the coating will continuously roll backward and continuously wet the new substrate surface. When the substrate surface passes the bottom of the 4.0 scraper, it will be coated with a uniform and thin layer of wet glue due to the squeezing and scraping effect of the scraper. The substrate with wet glue on the surface will directly enter the 50-170 degree high temperature oven. After 40 seconds of high temperature drying, the substrate will exit the 27-meter long intelligent temperature-controlled oven. Under the action of the main winding power traction, after the substrate passes through the guide roller, it will first undergo a 4-meter long rapid cooling treatment, and then be directly wound into a large roll by the power shaft core, waiting for the next process coating. S9. Applying a mild solvent-based matte ink-absorbing layer to the front of the substrate is the most crucial step in the entire coating process, whether producing wide-format wallcoverings and large-format custom curtains with back coating, or mild solvent-based matte canvases for handicrafts and decorative paintings without back coating. It is also the final coating layer for the entire product. The semi-finished substrate, which has already undergone multiple coating processes, is placed face up at the designated station. Following the normal startup procedure, the coating process begins. As usual, the substrate gradually moves forward at a constant speed along the balance guide roller, entering the feeding area of ​​the precision coating head for application of adhesive. The substrate enters the precision coating head and the coating station's material tank. A specially formulated weak-solvent matte ink-absorbing coating layer continuously tumbles backward as the substrate moves forward, rapidly covering its surface. After being scraped by a 4.0mm doctor blade, the substrate surface is coated with a uniform layer of the weak-solvent matte ink-absorbing layer. It then enters a 27-meter-long high-temperature oven where it undergoes 50 seconds of intelligent high-temperature drying at 150-180 degrees Celsius. After exiting the oven, the substrate undergoes two rapid surface cooling treatments before being automatically rolled into large rolls, then individually packaged and sold.

2. A method for producing a multi-coated, low-solvent matte inkjet canvas, characterized in that: The coatings include a base whitening layer, a base weighting layer, and a mild solvent matte ink-absorbing layer. The base whitening layer is applied sequentially to the outer surface of the substrate.

3. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formula for the primer whitening layer coating is as follows: Water: 10-20 kg Natural stone powder A (titanium dioxide): 5-10 kg Dispersant: 0.3-0.8 kg Defoamer: 0.2-0.6 kg PVA adhesive: 5-10 kg Natural stone powder E (light calcium carbonate): 12-18 kg Natural stone powder D (1250 mesh heavy calcium carbonate): 12-18 kg Natural stone powder C (600 mesh heavy calcium carbonate): 10-18 kg Natural stone powder B (400 mesh heavy calcium carbonate): 5-15 kg VAE Emulsion A: 20-30 kg VAE Emulsion B: 18-28 kg Acrylic emulsion: 3-8 kg Whitening agent: 0.15-0.45 kg Plasticizer: 1.5-3.5 kg Surfactant: 0.3-0.5 kg.

4. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formulation process for the base whitening coating is as follows: S1. In the dispersion tank of the high-speed mixer, first add the required amount of water. After starting the motor, slowly increase the speed to 1440 rpm. Then, add the dispersant, defoamer, and surfactant using a streamlined addition method. After each addition, stir at high speed for 5 minutes before adding another additive. S2. After the dispersion time of the last additive is reached, slowly add natural stone powder A (titanium dioxide), and after high-speed dispersion for 40 minutes, slowly add natural stone powder E (light calcium carbonate), and then disperse at high speed for 30 minutes. After that, reduce the motor speed to 800 rpm. S3. Next, pour the PVA glue into the bucket. After mixing at medium speed for 10 minutes, increase the speed to 1440 rpm. Then, slowly add natural stone powder B (400 mesh heavy calcium carbonate). After dispersing at high speed for 10 minutes, reduce the speed to 800 rpm. Then, slowly pour the prepared VAE emulsions A and B, as well as the acrylic emulsion, into the bucket. After all three emulsions are added, continue mixing for 10 minutes. Then, increase the motor speed to 1440 rpm and slowly add natural stone powder C (600 mesh heavy calcium carbonate) and natural stone powder D (1250 mesh heavy calcium carbonate). Then, continue dispersing at high speed for 90 minutes. S4. Then reduce the motor speed to 800 rpm, add the plasticizer and stir for 10 minutes, then add the whitening agent and continue mixing for 20 minutes. Then filter with a special filter screen and put it directly into a small bucket for use on the machine.

5. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formulation of the base layer weight-reinforcing coating is as follows: Water: 11-18 kg Dispersant (5040): 0.2-0.5 kg Defoamer (NXZ): 0.3-0.5 kg PVA adhesive (1799): 16-28 kg Natural stone powder A (titanium dioxide): 5-10 kg Natural stone powder B (600 mesh heavy calcium carbonate): 26-38 kg Natural stone powder C (talc): 10-20 kg VAE Emulsion A (707): 22-32 kg VAE Emulsion B (709): 10-20 kg Crosslinked emulsion (305): 1-3 kg Anti-shrinkage agent (stiffening agent): 0.3-0.5 kg.

6. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formulation process for the base layer weight-reinforcing coating is as follows: S1. In the dispersion tank of the high-speed mixer, first pour in a certain amount of water, start the motor, and then increase the motor speed to 1440 rpm. Then add the dispersant in a streamlined manner. After 5 minutes, add the defoamer in the same way. S2. After the defoamer is dispersed at high speed for 5 minutes, slowly add natural stone powder A (titanium dioxide). After adding, disperse at high speed for 40 minutes, then reduce the motor speed to 800 rpm, pour PVA glue into the bucket, stir for 10 minutes, then increase the motor speed to 1440 rpm, and slowly add natural stone powder B (600 mesh heavy calcium carbonate), and continue to disperse at high speed for 40 minutes. S3. Then reduce the motor speed to 800 rpm, add VAE emulsion A (707) first, stir for 20 minutes, then increase the speed to 1440 rpm, slowly add natural stone powder C (talc), disperse at high speed for 30 minutes, then reduce the speed to 800 rpm, then pour in VAE emulsion B (709), and stir at medium speed for 20 minutes; After 20 minutes, add the cross-linked emulsion (305) and stir for 10 minutes. Finally, add the anti-shrinkage agent (stiffening agent) slowly in a streamlined manner and stir continuously for 60 minutes. Then, filter with a special filter screen and directly put it into a small bucket for use in the machine.

7. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formulation and process of the nano-dispersion are as follows; Water: 70-100 kg Dispersant: 0.3-0.5 kg Silica: 10-20 kg Silica: 10-20 kg Nano-adsorbent: 10-20 kg; Nano-dispersion preparation process: After putting water into the tank, turn on the mixer and slowly increase the speed to 1440 rpm. Then, add the dispersant in a streamlined manner. After all the dispersant has been added, continue to stir at high speed for 15 minutes. Then, slowly add the silica, silica, and nano-adsorbent in sequence. After all the dispersant has been added, continue to disperse at high speed for 60 minutes before stopping the machine and waiting for the next step of coating preparation.

8. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formulation of the weak solvent matte ink-absorbing layer is as follows: Acrylic emulsion A (401): 50-80 kg Acrylic emulsion B: (5065) 20-30 kg Nano-dispersion: 30-50 kg Surfactant A (955): 0.3-0.5 kg Surfactant B (K5): 0.3-0.5 kg Defoamer: 0.3-0.5 kg Thickener: 0.3-0.5 kg Crosslinking agent: 0.1-0.5 kg.

9. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 2, characterized in that: The formulation process for the weak solvent matte ink-absorbing layer coating is as follows: S1. First, pour acrylic emulsion A (401) into the bucket, then increase the speed of the mixer to 800 rpm, and then slowly pour in acrylic emulsion B (5065). After that, add the defoamer in a streamlined manner. After adding, continue to mix and stir for 10 minutes. S2. Then slowly add surfactant A (955), and after 10 minutes slowly add surfactant B (K5). Then increase the motor speed to 1440 rpm, and slowly pour in the pre-prepared nano dispersion, and continue high-speed dispersion for 60 minutes. S3. Then reduce the motor speed to 800 rpm, and slowly add the crosslinking agent in a streamlined manner. After stirring for 10 minutes, slowly add the thickener. After all the thickener has been added, continue stirring for another 30 minutes. Then stop the machine and filter, ready for use.

10. The method for producing a multi-coated, weak-solvent matte inkjet printing material canvas according to claim 3, characterized in that: The defoamer contains 0.2 kg of ingredients.