A novel wood grain heat transfer paper and a preparation method thereof

Abstract

The application relates to the field of heat transfer printing, and mainly relates to a novel wood grain heat transfer printing paper and a preparation method thereof, the preparation method comprising the following steps: introducing water-based heat sublimation ink and solvent-based heat sublimation ink in color sections of a gravure printing machine, at least one section using the water-based heat sublimation ink, and at least one section using the solvent-based heat sublimation ink; and taking paper as a printing substrate to perform continuous gravure overprint production. The wood grain heat transfer printing paper prepared through the method has regions with different glossiness at the same time, effectively solving the problem that the glossiness of the wood grain heat transfer printing paper is single after being transferred on a metal profile surface, and further achieving a surface effect which is more rich in levels and more beautiful.

Description

Technical Field

[0001] This application relates to the field of heat transfer printing, and mainly to a novel wood grain heat transfer paper and its preparation method. Background Technology

[0002] Heat transfer printing is a surface decoration technique commonly used on materials such as wood, plastic, and metal. It involves printing patterns such as textures or text onto a carrier material such as printing paper or film, and then transferring the pattern to the surface of the target object through heat pressing, thereby achieving decorative logos and personalized effects. Due to its advantages such as simple and quick operation, large-scale production can be achieved with simple process adjustments, economical production equipment, and no volatile organic compound pollution, heat transfer printing has been widely used in many fields such as home decoration, electronic products, and textiles.

[0003] In home decoration materials, wood building materials suffer from drawbacks such as susceptibility to water damage, fading, and poor wear resistance, significantly reducing their lifespan and decorative effect. Currently, most imitation solid wood furniture and boards on the market achieve their wood grain effect through thin wood veneer. However, this process is not only cumbersome but also prone to damage, peeling, or cracking, resulting in less than ideal actual performance. Using wood grain heat transfer paper for heat transfer printing allows for the rapid transfer of wood grain patterns to the surface of materials, achieving both decorative and simulated wood grain effects. It also allows for personalized customization of more wood grain patterns. However, with rising living standards and evolving home decoration needs, people are demanding materials with both glossy and matte finishes. This places higher demands on the gloss variation and layering of the transferred wood grain patterns, requirements that current processes cannot meet. Therefore, traditional wood grain heat transfer paper generally suffers from insufficient sense of layering when directly transferred to smooth profile surfaces, especially on metal profiles. After being transferred to metal profiles, the surface of the metal profiles often exhibits a single gloss level, failing to achieve the texture and layering of real wood grain materials and failing to meet consumers' diverse needs for architectural decoration.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a new type of wood grain heat transfer paper and its preparation method, which aims to solve the problem that the existing wood grain heat transfer paper has a single gloss level after heat transfer to the surface of metal profiles.

[0006] The technical solution of this application is as follows:

[0007] This application provides a method for preparing a novel wood grain heat transfer paper, comprising the following steps:

[0008] In the color segments of a gravure printing press, water-based sublimation inks and solvent-based sublimation inks are introduced, with at least one print using water-based sublimation inks and at least one print using solvent-based sublimation inks;

[0009] Continuous gravure printing is carried out using paper as the printing substrate.

[0010] This method is simple and efficient. By using solvent-based and water-based sublimation inks in different order of printing plates, the gloss adjustment operation can be simplified. This method can prepare wood grain heat transfer paper with different gloss areas at the same time, effectively solving the problem of uniform gloss after wood grain heat transfer paper is transferred to the surface of metal profiles, thereby achieving a richer and more beautiful surface effect.

[0011] Furthermore, the solvent-based thermal sublimation ink comprises the following components by weight percentage:

[0012] First connecting material 0-15%;

[0013] Disperse dyes 0-25%;

[0014] First adjuvant: 0-10%;

[0015] The first dispersion is 65-100%.

[0016] Furthermore, the first binder is one or both of ethyl cellulose and polyvinyl butyral.

[0017] Furthermore, the first dispersion is one or more of methanol, ethanol, isopropanol and isobutanol.

[0018] Furthermore, the dye content in the disperse dye is 30%; the first auxiliary agent includes dispersant and defoamer, but does not include matting agent.

[0019] Furthermore, the aqueous thermal sublimation ink comprises the following components by weight percentage:

[0020] Second connecting material 0-15%;

[0021] Disperse dyes 0-25%;

[0022] Second adjuvant 0-10%;

[0023] The second dispersion is 60-100%.

[0024] Furthermore, the second dispersion is deionized water.

[0025] Further, the second binder is one or two of water-soluble resin, alkali-soluble resin, and acid-soluble resin; the water-soluble resin is one or more of solid acrylic resin J-678, solid acrylate SMA1000, hydroxyethyl cellulose, hydroxypropyl cellulose, and polyacrylamide.

[0026] Furthermore, the dye content in the disperse dye is 30%; the second auxiliary agent includes dispersant and defoamer, but does not include matting agent.

[0027] This application also provides a novel wood grain heat transfer paper prepared using the method described above, wherein at least one area of ​​the novel wood grain heat transfer paper is matte, and at least one area has a higher gloss level than the matte area.

[0028] Beneficial effects: The method for preparing the novel wood grain heat transfer paper provided in this application simplifies the gloss adjustment operation by using solvent-based sublimation ink and water-based sublimation ink in different order of printing plates. After the wood grain heat transfer paper is used to heat transfer metal profiles, it can form patterns with different gloss differences on the surface of the metal profiles, effectively solving the problem of uniform gloss after the wood grain heat transfer paper is transferred to the surface of metal profiles.

[0029] This application also provides a novel wood grain heat transfer paper prepared using the method described above, wherein at least one area of ​​the prepared novel wood grain heat transfer paper is matte, and at least one area has a higher gloss level than the matte area. The prepared wood grain heat transfer paper has areas with different gloss levels on the same surface, which, after transfer, can create a richer and more aesthetically pleasing surface effect on the profile. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the pattern of the novel wood grain heat transfer paper prepared in Example 1 of this application.

[0031] Figure 2 This is a schematic diagram of the pattern of the novel wood grain heat transfer paper prepared in Example 2 of this application.

[0032] Labeling Explanation: 1. Printing substrate; 2. Striped pattern; 3. Star pattern; 4. Diamond pattern. Detailed Implementation

[0033] This application provides a novel wood grain heat transfer paper and its preparation method. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0034] This application provides a method for preparing a novel wood grain heat transfer paper, comprising the following steps:

[0035] In the color segments of a gravure printing press, water-based sublimation inks and solvent-based sublimation inks are introduced, with at least one print using water-based sublimation inks and at least one print using solvent-based sublimation inks;

[0036] Continuous gravure printing is carried out using paper as the printing substrate.

[0037] This method is simple and efficient. By using solvent-based and water-based sublimation inks in different order of printing plates, the gloss adjustment operation can be simplified. This method can prepare wood grain heat transfer paper with different gloss areas at the same time, effectively solving the problem of uniform gloss after wood grain heat transfer paper is transferred to the surface of metal profiles, thereby achieving a richer and more beautiful surface effect.

[0038] Furthermore, solvent-based thermal sublimation inks, by weight percentage, comprise the following components:

[0039] First connecting material 0-15%;

[0040] Disperse dyes 0-25%;

[0041] First adjuvant: 0-10%;

[0042] The first dispersion is 65-100%.

[0043] In this application, because the disperse dye has a certain solubility in the first dispersion, it exists simultaneously in the ink solution in both molecular and particulate states. During gravure printing, the doctor blade removes the protruding ink particles from the dots, but the disperse dye solution between the dots is difficult to separate with the doctor blade, resulting in a transitional connection between the dots. After high-temperature transfer, the gloss of the wood grain heat transfer paper formed by the printed dots and the difference in gloss between the dots are small, resulting in a smaller overall gloss difference in the base powder after transfer, and thus exhibiting a higher overall gloss.

[0044] Furthermore, the first binder can be one or both of ethyl cellulose and polyvinyl butyral. The selected first binder has good thermal stability, which is beneficial to ensuring the transfer of ink and can also improve the gloss of solvent-based thermal sublimation inks. There are no restrictions on the amount and ratio of the binder used.

[0045] Furthermore, the first dispersion can be one or more of methanol, ethanol, isopropanol, and isobutanol. The selected first dispersion has good solubility and high volatility, which can improve the printing speed. There are no restrictions on the proportion and amount used, and the only difference is in the ink cost. It can be selected according to the needs of production cost.

[0046] Furthermore, the disperse dye contains 30% dye. Disperse dyes can be used as colorants in solvent-based sublimation inks.

[0047] Furthermore, the first auxiliary agent includes one or more of dispersants, defoamers, etc., but does not include matting agents. Solvent-based sublimation inks generally do not contain matting agents. However, by adding matting agents to solvent-based sublimation inks, it is possible to achieve variations in gloss between different printing passes after transfer. However, when customer orders change or the specified pattern needs to be adjusted, the solvent-based sublimation inks with added matting agents will increase the difficulty of managing residual ink in production. Improper handling can also lead to waste. Therefore, from a production perspective, adding matting agents increases instability and is detrimental to production. Therefore, the first auxiliary agent does not contain any organic or inorganic matting agents.

[0048] The dispersant can be 1-3% by weight, the defoamer can be 0.5-3% by weight, and the first additive can also include a leveling agent at a weight percentage of 0.5-3%. The added first additive can improve the ink's fluidity and coating performance, which is beneficial for gravure printing. The leveling agent can improve the leveling properties of the ink layer and enhance its gloss.

[0049] Furthermore, this application also provides a method for preparing solvent-based thermal sublimation ink, comprising the following steps:

[0050] The first binder and the first dispersion are added to a container according to the formula and mixed evenly to obtain a mixed solution;

[0051] Disperse dye and first auxiliary agent are added to the mixed solution according to the ratio, the temperature is raised to 55~60℃, and the mixture is stirred at a speed of 1000-1200 rpm for 0.5-1 hour. Then it is filtered through a filter with a pore size of 3μm to obtain solvent-based thermal sublimation ink.

[0052] The first dispersion used is highly volatile, so maintaining the temperature at 55-60℃ accelerates dispersion efficiency and reduces losses. Additionally, when the first additive includes a leveling agent, the leveling agent is added 2 minutes before the end of dispersion stirring to avoid compromising ink stability during dispersion.

[0053] Furthermore, the water-based thermal sublimation ink comprises the following components by weight percentage:

[0054] Second connecting material 0-15%;

[0055] Disperse dyes 0-25%;

[0056] Second adjuvant 0-10%;

[0057] The second dispersion is 60-100%.

[0058] Furthermore, the second dispersion is deionized water. Since disperse dyes have extremely low solubility in deionized water, they are almost insoluble in water-based sublimation inks. After dispersion, the disperse dyes are dispersed in the water-soluble resin solution as particles of a certain size. During gravure printing, protruding ink particles in the halftone dots are scraped off, and the disperse dye particles between the dots are easily separated by the doctor blade, resulting in almost no disperse dye in the areas between the dots, and no transitional connection between the disperse dye particles. After high-temperature transfer, the gloss of the printed heat transfer paper differs greatly from the gloss between the printed dots. Correspondingly, the overall gloss of the base powder after transfer also varies greatly; therefore, the overall gloss appears matte.

[0059] Furthermore, the second binder can be one or two of water-soluble resin, alkali-soluble resin, and acid-soluble resin.

[0060] Furthermore, the water-soluble resin can be one or more of the following: solid acrylic resin J-678, solid acrylate SMA1000, hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPMC), and polyacrylamide (PAM).

[0061] Preferably, the second binder is solid acrylic resin J-678 and solid acrylate SMA1000. The preferred solid acrylic resin J-678 and solid acrylate SMA1000 can improve the dispersibility, color development, and film-forming properties of disperse dyes, thereby improving the color rendering effect of the transferred pattern.

[0062] Furthermore, the disperse dye contains 30% dye. Disperse dyes can be used as colorants in water-based sublimation inks.

[0063] Furthermore, the second auxiliary agent includes one or more of dispersants, defoamers, etc., but excludes matting agents. Existing water-based sublimation inks typically do not contain matting agents; however, based on the same production considerations as solvent-based sublimation inks, the second auxiliary agent of water-based sublimation inks also does not contain any organic or inorganic matting agents.

[0064] Furthermore, the second auxiliary agent may also include an emulsifier or a leveling agent to improve the dispersion performance of the water-based sublimation ink. Specifically, the weight percentage of the dispersant can be 2%–5%, the weight percentage of the defoamer can be 0.1%–3%, the weight percentage of the emulsifier can be 0.1%–3%, and the weight percentage of the leveling agent can be 0.1%–3%. Water-based sublimation inks often have poor resin compatibility, so a relatively high amount of dispersant is used to reduce the aggregation of disperse dyes and improve the pad printing effect. The addition of an emulsifier further enhances the dispersion performance of the water-based sublimation ink.

[0065] Furthermore, this application also provides a method for preparing water-based thermal sublimation ink, comprising the following steps:

[0066] Add the second binder, the second dispersion, the disperse dye, and the second auxiliary agent to a container according to the formula, heat to 70~80℃, maintain the temperature at a speed of 1000-1200 rpm and stir for 0.5-2 hours, and then filter through a filter with a pore size of 3μm to obtain water-based thermal sublimation ink.

[0067] Maintaining the temperature at 70-80℃ can accelerate dispersion efficiency. Additionally, when the second additive includes a leveling agent, the leveling agent should be added 2 minutes before the end of dispersion mixing to avoid compromising ink stability during the dispersion process.

[0068] Before transferring the image onto the surface of a metal profile, a base powder or a powder coating is typically applied, with the thickness of this intermediate layer generally exceeding 60 μm. However, without adjustments, the intermediate layer's ability to cover the metal profile surface is relatively limited. Therefore, after heat transfer, the gloss of the metal profile surface itself significantly affects the gloss of the transferred pattern.

[0069] To address this issue, in addition to adding a filler with hiding power to the intermediate layer coating, this application further includes 6-8% by weight of polyethylene wax in both the first additive of solvent-based sublimation inks and the second additive of water-based sublimation inks. The added polyethylene wax possesses unique thixotropic properties, ensuring stable compatibility in the ink. It also acts as a lubricant, further improving the ink's dispersion performance and enhancing its stability and transferability. Furthermore, after the ink stabilizes, the polyethylene wax floats on the ink layer surface, providing a degree of protection. During the heated and pressurized transfer process, the ink layer of the wood grain heat transfer paper is applied to the intermediate layer on the surface of the metal profile. The wax film originally located on the surface of the ink layer melts, and the ink can then transfer the wood grain pattern to the surface of the profile. The transfer temperature is generally around 200℃. This application adds a large amount of polyethylene wax. When the transfer temperature is high, some of the polyethylene wax remaining on the surface of the intermediate layer will decompose, thus forming a certain amount of coverage between the intermediate layer and the ink layer. This helps to further reduce the influence of the surface gloss of the metal profile on the gloss of the transferred pattern.

[0070] Furthermore, after the transfer process, the gloss levels of water-based and solvent-based sublimation inks generally differ by 20-60 degrees, showing a significant difference. Moreover, by adding binders with different gloss levels or fillers, the gloss range of either water-based or solvent-based sublimation inks can be altered. Specifically, the gloss range of water-based sublimation inks is 5-25 degrees, while that of solvent-based sublimation inks is 40-85 degrees.

[0071] The method for preparing the novel wood grain heat transfer paper provided in this application simplifies the gloss adjustment operation by using solvent-based sublimation ink and water-based sublimation ink in different order of printing plates. After the wood grain heat transfer paper is used to heat transfer metal profiles, it can form patterns with different gloss differences on the surface of the metal profiles, effectively solving the problem of uniform gloss after the wood grain heat transfer paper is transferred to the surface of metal profiles.

[0072] In some specific embodiments, paper is used as the printing substrate. The preparation method of the novel wood grain heat transfer paper specifically includes the following steps:

[0073] (1) Prepare solvent-based and water-based sublimation inks, and prepare paper and doctor blades;

[0074] (2) The paper is mounted on the feeding rack of the gravure printing machine as the printing substrate;

[0075] (3) Introduce water-based sublimation ink and solvent-based sublimation ink into the color segments of the gravure printing press, wherein at least one plate uses water-based sublimation ink and at least one plate uses solvent-based sublimation ink;

[0076] (4) Perform continuous gravure overprinting production;

[0077] (5) The finished product is rolled up and the printing is completed.

[0078] Furthermore, after introducing water-based and solvent-based sublimation inks into the gravure printing press, the following steps are also included: adjusting the ink viscosity, the air box temperature of the printing press, and the production speed of the printing press. The air box temperature of the printing press is between 120℃ and 160℃, and the production speed of the printing press is between 50 m / min and 200 m / min.

[0079] Furthermore, in step (3), the viscosity of the solvent-based sublimation ink is controlled to be 30-42 seconds, and the viscosity of the water-based sublimation ink is controlled to be 25-32 seconds. The doctor blade needs to apply a certain pressure to scrape away the ink outside the dots, and the ink viscosity will also affect the scraping effect and the ink layer thickness, thus affecting the gloss effect. By adjusting the ink viscosity, the fluidity of the ink during the printing process can be controlled, which can affect the gloss difference between the solvent-based and water-based sublimation inks. Under the premise of ensuring that the printing process is not affected, by controlling the water-based sublimation ink with lower viscosity and better wetting properties to form a thinner ink layer, the gloss is reduced; when the doctor blade cannot completely scrape away the dispersed dye between the dots, by controlling the viscosity of the solvent-based sublimation ink to be higher, a thicker ink layer can be formed, which can further improve the gloss and increase the gloss difference with the water-based sublimation ink.

[0080] This application also provides a novel wood grain heat transfer paper prepared using the method described above, wherein at least one area of ​​the prepared novel wood grain heat transfer paper is matte, and at least one area has a higher gloss level than the matte area. The prepared wood grain heat transfer paper has areas with different gloss levels on the same surface, which, after transfer, can create a richer and more aesthetically pleasing surface effect on the metal profile.

[0081] Furthermore, the transfer process involves first powder coating or spraying the metal profile, then wrapping the surface of the metal profile with wood grain heat transfer paper. After vacuum heating and heat transfer, the paper is removed, resulting in a pattern with different gloss levels on the metal profile surface. Metal profiles are relatively smooth, and the adhesion of ink directly to the metal profile surface is weak, leading to poor transfer results. However, by powder coating or spraying the metal profile, during the heat transfer process, the sublimation ink sublimates at high temperatures, forming a pattern. The ink can also penetrate into the coating or powder coating on the metal profile surface, resulting in good adhesion between the ink and the coating layer, a strong three-dimensional effect, and a consistently good decorative effect. Preferably, this application uses spraying, employing the existing electrostatic powder spraying process. By using spraying, a layer of highly adhesive base powder is prepared on the metal profile surface before wood grain heat transfer. This results in good color transfer and a very low probability of color difference, which is beneficial for achieving different gloss levels.

[0082] The present application will be further described below through specific embodiments.

[0083] In this application, paper is used as the printing substrate, and solvent-based sublimation ink and water-based sublimation ink are prepared for use.

[0084] Solvent-based sublimation inks include the following components:

[0085] 15% ethyl cellulose;

[0086] Disperse dyes 15%;

[0087] Dispersant 1%;

[0088] Defoamer 0.5%;

[0089] Polyethylene wax 7%;

[0090] Isopropanol 61.5%.

[0091] The method for preparing solvent-based sublimation ink according to the embodiments of this application includes the following steps:

[0092] Add 15% ethyl cellulose and 61.5% isopropanol to a container according to the specified ratio and mix thoroughly to obtain a mixed solution;

[0093] Add 15% disperse dye, 1% dispersant, 0.5% defoamer and 7% polyethylene wax to the mixed solution according to the formula, heat to 60°C, maintain the temperature at a speed of 1200 rpm and stir for 0.5 hours, and then filter through a filter with a pore size of 3μm to obtain solvent-based thermal sublimation ink.

[0094] Water-based thermal sublimation inks include the following components:

[0095] Solid acrylic resin J-678 5%;

[0096] Solid acrylate SMA1000 5%;

[0097] Disperse dyes 10%;

[0098] Dispersant 3%;

[0099] Defoamer 0.5%;

[0100] Polyethylene wax 6.5%;

[0101] 70% deionized water.

[0102] The method for preparing the water-based thermal sublimation ink according to the embodiments of this application includes the following steps:

[0103] According to the formula, 5% solid acrylic resin J-678, 5% solid acrylate SMA1000, 70% deionized water, 10% disperse dye, 3% dispersant, 0.5% defoamer and 6.5% polyethylene wax are added to a container, heated to 75°C, and dispersed and stirred at 1200 rpm for 1 hour. Then, the mixture is filtered through a filter with a pore size of 3μm to obtain water-based thermal sublimation ink.

[0104] Example 1

[0105] (1) Prepare solvent-based and water-based sublimation inks, and prepare paper and doctor blades;

[0106] (2) The paper is mounted on the feeding rack of the gravure printing machine as the printing substrate;

[0107] (3) Water-based sublimation ink is introduced into the first strip pattern gravure color segment of the gravure printing press, and solvent-based sublimation ink is introduced into the second star pattern gravure color segment and the third diamond pattern gravure color segment.

[0108] (4) Perform continuous gravure overprinting production;

[0109] (5) The finished product is rolled up and the printing is completed.

[0110] The pattern of the heat-transfer wood grain paper prepared in Example 1 is as follows: Figure 1 As shown, it includes a printing substrate 1, a striped pattern 2, a star-shaped pattern 3, and a diamond-shaped pattern 4.

[0111] A base powder layer is prepared on the surface of the aluminum profile by spraying. The surface of the metal profile is then covered with the wood grain heat transfer paper prepared in the above steps. After vacuum heating and heat transfer, the paper is removed, and the corresponding pattern is obtained on the surface of the metal profile. Some of the polyethylene wax remaining on the surface of the base powder decomposes and forms a certain degree of coverage between the aluminum profile and the ink layer. The gloss of the aluminum profile has a very limited impact on the gloss of the transferred pattern.

[0112] After the transfer, the gloss effect on the aluminum profile surface is significantly lower in the area corresponding to the striped pattern 2 of the first version than in the star pattern 3 of the second version and the diamond pattern 4 of the third version, with obvious differences in gloss.

[0113] Example 2

[0114] (1) Prepare solvent-based and water-based sublimation inks, and prepare paper and doctor blades;

[0115] (2) The paper is mounted on the feeding rack of the gravure printing machine as the printing substrate;

[0116] (3) Solvent-based sublimation ink is introduced into the first strip pattern gravure color segment of the gravure printing press, and water-based sublimation ink is introduced into the second star pattern gravure color segment and the third diamond pattern gravure color segment.

[0117] (4) Perform continuous gravure overprinting production;

[0118] (5) The finished product is rolled up and the printing is completed.

[0119] The pattern of the heat-transfer wood grain paper prepared in Example 2 is as follows: Figure 2 As shown, it includes a printing substrate 1, a striped pattern 2, a star-shaped pattern 3, and a diamond-shaped pattern 4.

[0120] A base powder layer is prepared on the surface of the aluminum profile by spraying. The surface of the metal profile is then covered with the wood grain heat transfer paper prepared in the above steps. After vacuum heating and heat transfer, the paper is removed, and the corresponding pattern is obtained on the surface of the metal profile. Some of the polyethylene wax remaining on the surface of the base powder decomposes and forms a certain degree of coverage between the aluminum profile and the ink layer. The gloss of the aluminum profile has a very limited impact on the gloss of the transferred pattern.

[0121] After the transfer, the gloss effect on the aluminum profile surface is significantly lower in the corresponding areas of the star pattern 3 of the second version and the diamond pattern 4 of the third version than in the strip pattern 2 of the first version, with obvious differences in gloss.

[0122] Generally speaking, as the ink layer thickness increases, the gloss also increases. Therefore, the gloss of the overlapping parts in Examples 1 and 2 will change, but it will not have a significant impact on the gloss difference between different areas.

[0123] The novel wood grain heat transfer paper preparation method provided in this application is simple and efficient. By using solvent-based sublimation ink and water-based sublimation ink in different order of printing plates, the gloss adjustment operation can be simplified. This method can prepare wood grain heat transfer paper with different gloss areas at the same time, effectively solving the problem of uniform gloss after wood grain heat transfer paper is transferred to the surface of metal profiles, thereby achieving a richer sense of layering and a more beautiful surface effect.

[0124] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.

Claims

1. A method for preparing a novel wood grain heat transfer paper, characterized in that, The novel wood grain heat transfer paper has at least one area that is matte, and at least one area that has a higher gloss level than the matte area. The preparation method includes the following steps: In the color segments of a gravure printing press, water-based sublimation inks and solvent-based sublimation inks are introduced, with at least one print using water-based sublimation inks and at least one print using solvent-based sublimation inks; Continuous gravure printing is carried out using paper as the printing substrate. The solvent-based sublimation ink comprises the following components by weight percentage: First connecting material 0-15%; Disperse dyes 0-25%; First adjuvant: 0-10%; First dispersion: 65-100%; Disperse dyes have a certain solubility in the first dispersion. Disperse dyes exist in the ink solution in both molecular and particulate states. During gravure printing, the doctor blade scrapes off the ink particles protruding from the dots. The disperse dye solution between dots is difficult to be scraped off by the doctor blade, so that there is a disperse dye solution to connect the dots. The first binder is one or both of ethyl cellulose and polyvinyl butyral; The first dispersion is one or more of methanol, ethanol, isopropanol and isobutanol; The disperse dye has a dye content of 30%; the first auxiliary agent includes a dispersant and a defoamer, but does not include a matting agent; The water-based thermal sublimation ink comprises the following components by weight percentage: Second connecting material 0-15%; Disperse dyes 0-25%; Second adjuvant 0-10%; Second dispersion 60-100%; The second dispersion is deionized water; Disperse dyes have extremely low solubility in deionized water and are almost insoluble in water-based sublimation inks. After dispersion, dispersed dyes are dispersed in the form of particles of a certain size. When water-based sublimation inks are printed by gravure printing, the protruding ink particles in the halftone dots are scraped off and removed. The dispersed dye particles between the halftone dots are easily scraped off by the doctor blade, so that there is almost no dispersed dye in the area between the halftone dots. The disperse dye has a dye content of 30%; the second auxiliary agent includes a dispersant and a defoamer, but does not include a matting agent; The first and second additives also include polyethylene wax.

2. The method for preparing the novel wood grain heat transfer paper according to claim 1, characterized in that, The second binder is one or two of water-soluble resin, alkali-soluble resin and acid-soluble resin; the water-soluble resin is one or more of solid acrylic resin J-678, solid acrylate SMA1000, hydroxyethyl cellulose, hydroxypropyl cellulose and polyacrylamide.

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