Printing ink, high-simulation paintfeel decorative paper and production process

Abstract

The invention discloses ink, high-simulation paintfeel decorative paper and a production process, and relates to the field of decorative paper ink, the ink comprises a pre-coating layer and an ink coating layer, the pre-coating layer comprises the following components in parts by weight: 15-20 parts of polyvinyl alcohol, 10-13 parts of wax emulsion, 30-35 parts of a slow solvent, 10-15 parts of titanium dioxide and 30-40 parts of deionized water; the ink coating layer comprises the following components in parts by weight: 20-30 parts of acrylate resin, 5-7 parts of a UV photoinitiator, 3-5 parts of a double-layer slow-release quick-drying agent, 15-20 parts of titanium dioxide and 50-60 parts of deionized water. The method has the advantages that the drying uniformity and stability of the printing ink are improved, so that the decorative paper with better adhesive force and better color expressive force is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of decorative paper, and in particular to ink, highly simulated paint-feel decorative paper and a production process. Background Art

[0002] As the market demand for highly realistic paint-like decorative paper increases, existing ink coatings and production processes face many technical bottlenecks and difficulties, making it difficult to simultaneously meet high standards for appearance, durability and production efficiency. These problems not only restrict the innovation and development of the decorative paper industry, but also increase production costs and complexity, affecting market competitiveness.

[0003] Traditional ink coating technology often faces the problem of uneven drying speed during the drying process after coating, which is manifested in the asynchronous drying process of the outer layer and the deep layer. Generally speaking, the outer layer will dry faster than the inner layer, which will cause the surface layer to form a solidified film in a short time, while the inner layer has not yet completely volatilized the solvents or components it contains, resulting in a limited subsequent drying process. Due to this uneven drying behavior, stress will accumulate inside the coating, causing cracking or blistering. The structural stability of the coating is impaired, which not only affects the visual and user experience of the product, but also reduces its reliability in actual use. The fast-drying surface layer in the existing coating process will inhibit the normal volatilization of the deep-layer solvent, thereby affecting the overall structural stability and adhesion performance. The difficulty in discharging the deep-layer solvent will form voids or bubbles in the coating, affecting the uniformity and durability of the coating. This not only causes the coating to easily bubble after application, but also increases the risk of the coating falling off or peeling off when the use environment changes. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an ink, a highly simulated paint-like decorative paper and a production process.

[0005] The above object of the present invention is achieved through the following technical solutions: An ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 15-20 parts of polyvinyl alcohol; 10-13 parts wax emulsion; 30-35 parts of slow solvent; 10-15 parts of titanium dioxide; 30-40 parts of deionized water The ink coating layer comprises the following components in parts by weight: 20-30 parts of acrylate resin; 5-7 parts of UV photoinitiator; 3-5 parts of double-layer slow-release quick-drying agent; 15-20 parts of titanium dioxide; 50-60 parts of deionized water.

[0006] Furthermore, the double-layer sustained-release quick-drying agent comprises inner-layer particles and an outer covering layer, wherein the inner-layer particles are sustained-release particles with ethanol as the core solvent and hydroxypropyl methylcellulose as the coating material, and the outer covering layer is selected from polyvinyl alcohol or polyethylene glycol.

[0007] Further, the inner layer particles are prepared by comprising the following components in parts by weight; 5-8 parts of ethanol; Polylactic acid 5-10 parts; Polyvinyl alcohol 0.5-2 parts 100-120 parts of dichloromethane; 100-130 parts of deionized water.

[0008] Furthermore, the preparation method of the inner layer particles is as follows: Step A: dissolving polylactic acid in dichloromethane to obtain solution A, and adding ethanol to solution A and stirring to obtain solution B; Step B: polyvinyl alcohol and deionized water are uniformly mixed to obtain solution C, solution B is added dropwise to solution C and emulsified using a high-speed stirrer or ultrasonic dispersing equipment; Step C: at 10-15° C., slowly evaporate dichloromethane and filter to obtain inner layer particles.

[0009] Furthermore, the preparation steps of the double-layer slow-release quick-drying agent are as follows: Step 1: preparing inner layer particles; Step 2: Use a casting method or a spraying method to cover the outer covering layer material on the surface of the inner layer particles.

[0010] Traditional ink coatings usually use only a single-layer design, resulting in inaccurate control of drying speed and adhesion. The present invention achieves optimization of the double-layer structure through the combination of a pre-coating layer and an ink coating layer. The pre-coating layer is composed of components such as polyvinyl alcohol, wax emulsion, slow solvent, titanium dioxide and deionized water. Its function is to form a stable and controllable bottom layer, which helps to regulate the drying process of the inner layer and the surface layer. The pre-coating layer can provide a good adhesion foundation and durability after coating, providing ideal physical support for the subsequent ink coating layer.

[0011] The ink coating layer uses a combination of acrylate resin and UV photoinitiator to make the surface layer cure quickly under light. This design helps to form a solid protective layer to prevent the outer ink from diffusing. The combination of the double-layer structure improves the overall drying performance and stability of the ink, thus overcoming the problem of uneven drying of the inner and outer layers in the prior art.

[0012] The double-layer slow-release quick-drying agent consists of an inner layer of particles and an outer layer of covering layer. The inner layer of particles uses ethanol as the core solvent and polylactic acid as the coating material, which ensures that the ethanol can be gradually released; the outer layer of covering layer is made of polyvinyl alcohol or polyethylene glycol, which further controls the release rate of the solvent. Through the double-layer slow-release structure, the release rate of the inner layer of ethanol is protected and regulated by the outer layer material. Compared with the traditional single-layer structure where the drying speed is difficult to control due to the rapid volatilization of the solvent, the double-layer structure can achieve a smoother and more controllable solvent release, avoiding surface cracking and insufficient adhesion caused by too fast drying. The outer layer of polyvinyl alcohol or polyethylene glycol covering layer not only controls the release of the inner layer of ethanol, but also works with the acrylic resin under light to quickly form a protective film. This dual mechanism ensures that the surface layer can be cured in a short time, while providing conditions for the slow release of the inner layer.

[0013] Secondly, titanium dioxide is widely used as the main pigment to improve the whiteness and hiding power of the coating. This technical solution ensures the fullness and uniformity of the printing effect by evenly distributing titanium dioxide in the pre-coating layer and the ink coating layer. The introduction of a double-layer slow-release quick-drying agent further enhances the effect of titanium dioxide and avoids pigment aggregation and color unevenness by controlling the drying process.

[0014] Furthermore, the pre-coating layer also includes 5 to 8 parts by weight of talc.

[0015] The scaly structure of talcum powder can form a fine "shielding layer" in the inner layer, which prevents the solvent from being released too quickly during the drying and curing process, and promotes the slow release effect of the temperature control material. This design innovatively enhances the controlled release function of the inner layer, making it have a more stable drying characteristic when the temperature changes.

[0016] Furthermore, since talc improves the overall stability and surface fineness of the inner coating, it can provide a better adhesion basis for the outer layer, helping to enhance the adhesion between the outer coating and the inner layer.

[0017] Furthermore, the D50 particle size of the titanium dioxide is 0.2-0.5 μm.

[0018] Furthermore, the slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2-3.

[0019] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2-3, and has an innovative drying adjustment function. The use of slow solvent prolongs the drying time in the pre-coating layer, making the solvent evaporation rate more uniform, ensuring that the pre-coating layer maintains a stable condensation state during the natural drying process. This design avoids the cracking and surface unevenness caused by the rapid evaporation of solvents in traditional processes. By selecting a combination of solvents in an appropriate proportion, the solution ensures that the pre-coating layer has enough time to self-adjust and cure, thereby making the structural stability of the inner coating higher and providing a smooth and solid foundation for the subsequent ink coating layer.

[0020] A decorative paper prepared according to the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer sequentially coated on the fiber base paper.

[0021] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 10 to 20 microns, and dry naturally for 30 minutes.

[0022] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to be 5 to 10 microns; use UV lamp to irradiate intermittently for 5 to 10 seconds; S3: Preliminarily dry the decorative paper coated with two layers at 40° C. for 20 to 30 minutes, and then increase the temperature to 80 to 100° C. for deep drying for 30 to 40 minutes.

[0023] The production process includes a combination of natural drying and staged temperature increase, which reflects the innovation of drying control. Step S1 forms a stable foundation on the fiber base paper by initially consolidating the pre-coating thickness through natural drying. Step S2 uses intermittent irradiation of UV lamps to ensure the rapid curing of the surface layer of the ink coating while protecting the slow-release process of the inner layer. The multi-stage temperature control of step S3 (initial drying at 40°C and deep drying at 80-100°C) ensures the stability and adhesion of the overall coating structure. This multi-stage drying method avoids the problems of uneven coating and cracks caused by temperature fluctuations or single heating conditions in traditional processes, making the product have better resistance to environmental stress and long-term performance.

[0024] Compared with the prior art, the present invention has the following beneficial effects: The double-layer coating design of pre-coating layer and ink coating layer realizes multi-level functionality. The pre-coating layer provides a smooth and stable foundation for the final printing surface, has good adhesion and anti-deformation ability, and provides ideal adhesion conditions and uniform drying environment for the subsequent ink layer. The ink coating layer forms a high-gloss and wear-resistant surface layer under the action of acrylic resin and UV photoinitiator, which enhances the visual effect and physical properties of the decorative paper. The double-layer design enables the decorative paper to reach higher standards in color performance, durability and gloss retention.

[0025] The double-layer slow-release quick-drying agent introduced in the ink coating layer embodies multiple drying control innovations. Its unique double-layer structure, with the inner layer being an ethanol core solvent wrapped in polylactic acid and the outer layer being covered by polyvinyl alcohol or polyethylene glycol, provides the effect of releasing ethanol in stages. This design enables the ink coating to undergo rapid surface curing at the beginning (the effect of acrylate resin under UV irradiation), followed by gradual release of the inner layer solvent to maintain deep drying of the coating and avoid defects caused by internal solvent retention after surface curing. Through slow-release technology, the ink coating can better adjust the drying speed and overcome the problem of drying too fast or too slow in traditional coatings. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with embodiments.

[0027] Embodiment 1, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 15 parts of polyvinyl alcohol; 10 parts of wax emulsion; 30 parts of slow solvent; Titanium dioxide 10 parts; 30 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 3 parts of double-layer slow-release quick-drying agent; 15 parts of titanium dioxide; 50 parts of deionized water.

[0028] The D50 particle size of the titanium dioxide is 0.5 μm.

[0029] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0030] The UV photoinitiator was UV photoinitiator 1173.

[0031] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0032] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred in proportion, and ethanol is added thereto in proportion, and stirred to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0033] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0034] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0035] A decorative paper prepared by using the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer which are sequentially coated on the fiber base paper.

[0036] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 20 microns, and dry naturally for 30 minutes.

[0037] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 20 minutes, and then the temperature was increased to 80°C for deep drying for 30 minutes.

[0038] Embodiment 2, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 20 parts of polyvinyl alcohol; 13 parts of wax emulsion; 35 parts of slow solvent; 15 parts of titanium dioxide; 40 parts of deionized water The ink coating layer comprises the following components in parts by weight: 30 parts of acrylate resin; UV photoinitiator 7 parts; 5 parts of double-layer slow-release quick-drying agent; 20 parts of titanium dioxide; 60 parts of deionized water.

[0039] The D50 particle size of the titanium dioxide is 0.5 μm.

[0040] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0041] The UV photoinitiator was UV photoinitiator 1173.

[0042] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0043] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred uniformly according to a proportion, and ethanol is added thereto according to a proportion, and stirred uniformly to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0044] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0045] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0046] A decorative paper prepared by using the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer which are sequentially coated on the fiber base paper.

[0047] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 10 microns, and dry naturally for 30 minutes.

[0048] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 15 microns; use UV lamp to irradiate intermittently for 10 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 30 minutes, and then the temperature was increased to 100°C for deep drying for 40 minutes.

[0049] Embodiment 3, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 17 parts of polyvinyl alcohol; 12 parts wax emulsion; 34 parts of slow solvent; Titanium dioxide 14 parts; 35 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 25 parts; 6 parts of UV photoinitiator; 4 parts of double-layer slow-release quick-drying agent; Titanium dioxide 16 parts; 55 parts of deionized water.

[0050] The D50 particle size of the titanium dioxide is 0.5 μm.

[0051] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0052] The UV photoinitiator was UV photoinitiator 1173.

[0053] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0054] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred uniformly according to a proportion, and ethanol is added thereto according to a proportion, and stirred uniformly to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0055] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0056] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0057] A decorative paper prepared by using the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer which are sequentially coated on the fiber base paper.

[0058] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 20 microns, and dry naturally for 30 minutes.

[0059] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 30 minutes, and then the temperature was increased to 100°C for deep drying for 30 minutes.

[0060] Embodiment 4, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 15 parts of polyvinyl alcohol; 10 parts of wax emulsion; 30 parts of slow solvent; Titanium dioxide 10 parts; 30 parts of deionized water The ink coating layer comprises the following components in parts by weight: 30 parts of acrylate resin; UV photoinitiator 7 parts; 5 parts of double-layer slow-release quick-drying agent; 20 parts of titanium dioxide; 60 parts of deionized water.

[0061] The D50 particle size of the titanium dioxide is 0.5 μm.

[0062] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0063] The UV photoinitiator was UV photoinitiator 1173.

[0064] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0065] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred uniformly according to a proportion, and ethanol is added thereto according to a proportion, and stirred uniformly to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0066] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0067] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0068] A decorative paper prepared with the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer sequentially coated on the fiber base paper.

[0069] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 100 microns, and dry naturally for 30 minutes.

[0070] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 10 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 20 minutes, and then the temperature was increased to 100°C for deep drying for 40 minutes.

[0071] Embodiment 5, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 20 parts of polyvinyl alcohol; 13 parts of wax emulsion; 35 parts of slow solvent; 15 parts of titanium dioxide; 40 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 3 parts of double-layer slow-release quick-drying agent; 15 parts of titanium dioxide; 50 parts of deionized water.

[0072] The D50 particle size of the titanium dioxide is 0.5 μm.

[0073] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:3.

[0074] The UV photoinitiator was UV photoinitiator 1173.

[0075] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0076] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred in proportion, and ethanol is added thereto in proportion, and stirred to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0077] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0078] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0079] A decorative paper prepared by using the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer which are sequentially coated on the fiber base paper.

[0080] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 15 microns, and dry naturally for 30 minutes.

[0081] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 18 microns; use UV lamp to irradiate intermittently for 10 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 30 minutes, and then the temperature was increased to 100°C for deep drying for 300 minutes.

[0082] Embodiment 6, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 20 parts of polyvinyl alcohol; 13 parts of wax emulsion; 35 parts of slow solvent; 15 parts of titanium dioxide; 7 parts of talcum powder; 40 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 3 parts of double-layer slow-release quick-drying agent; 15 parts of titanium dioxide; 50 parts of deionized water.

[0083] The D50 particle size of the titanium dioxide is 0.5 μm.

[0084] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0085] The UV photoinitiator was UV photoinitiator 1173.

[0086] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0087] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred in proportion, and ethanol is added thereto in proportion, and stirred to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0088] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0089] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0090] A decorative paper prepared by using the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer which are sequentially coated on the fiber base paper.

[0091] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide and talcum powder, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 20 microns, and dry naturally for 30 minutes.

[0092] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 20 minutes, and then the temperature was increased to 100°C for deep drying for 30 minutes.

[0093] Embodiment 7, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 20 parts of polyvinyl alcohol; 13 parts of wax emulsion; 35 parts of slow solvent; 15 parts of titanium dioxide; 6 parts of talcum powder; 40 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 3 parts of double-layer slow-release quick-drying agent; 15 parts of titanium dioxide; 50 parts of deionized water.

[0094] The D50 particle size of the titanium dioxide is 0.5 μm.

[0095] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0096] The UV photoinitiator was UV photoinitiator 1173.

[0097] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0098] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred uniformly according to a proportion, and ethanol is added thereto according to a proportion, and stirred uniformly to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0099] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0100] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0101] A decorative paper prepared with the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer sequentially coated on the fiber base paper.

[0102] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide and talcum powder, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 20 microns, and dry naturally for 30 minutes.

[0103] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 30 minutes, and then the temperature was increased to 100°C for deep drying for 30 minutes.

[0104] Embodiment 8, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 20 parts of polyvinyl alcohol; 13 parts of wax emulsion; 35 parts of slow solvent; 15 parts of titanium dioxide; 8 parts of talcum powder; 40 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 3 parts of double-layer slow-release quick-drying agent; 15 parts of titanium dioxide; 50 parts of deionized water.

[0105] The D50 particle size of the titanium dioxide is 0.5 μm.

[0106] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0107] The UV photoinitiator was UV photoinitiator 1173.

[0108] Preparation method of double-layer slow-release quick-drying agent: The double-layer slow-release quick-drying agent includes a core particle and a surface layer covering the surface of the core particle. The core particle is a slow-release particle with ethanol as the core solvent and polylactic acid as the coating material, and is prepared by the following components in parts by weight: 5 parts of ethanol, 10 parts of polylactic acid, 2 parts of polyvinyl alcohol, 100 parts of dichloromethane, and 100 parts of deionized water. The surface layer is prepared by polyvinyl alcohol.

[0109] (1) Preparation of core particles The core particles were prepared as follows: Step A: polylactic acid and dichloromethane are mixed and stirred uniformly according to a proportion, and ethanol is added thereto according to a proportion, and stirred uniformly to obtain solution A; Step B: After polyvinyl alcohol and deionized water are uniformly mixed in proportion to obtain solution B, solution B is added dropwise to solution A, and then dispersed and emulsified by a high-speed stirrer to obtain an emulsion containing suspended emulsified particles; wherein the stirring speed of the high-speed stirrer is controlled to 6000 rpm, and the emulsification time is controlled to 10 min.

[0110] Step C: reduce the rotation speed to 300 rpm, volatilize dichloromethane at low temperature at 10°C for 6 hours, solidify the emulsified particles into solid microcapsule particles, and then filter, wash and dry to obtain core particles, the average particle size of the core particles is 3 μm.

[0111] (2) Preparation of surface layer Polyvinyl alcohol was dissolved in water to obtain a 5wt% polyvinyl alcohol solution, and the core particles were placed in a fluidized bed to allow the core particles to roll evenly, and then the polyvinyl alcohol solution was sprayed onto the surface of the core particles by a pressure sprayer; after spraying, the particles were dried at 50°C for 20 minutes; and the particles with a coating completeness of less than 60% were screened out. The D50 particle size of the core particles covering the surface layer was 10μm, that is, the D50 particle size of the double-layer slow-release quick-drying agent was 10μm.

[0112] A decorative paper prepared with the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer sequentially coated on the fiber base paper.

[0113] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide and talcum powder, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 20 microns, and dry naturally for 30 minutes.

[0114] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 to 10 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 230 minutes, and then the temperature was increased to 100°C for deep drying for 40 minutes.

[0115] Comparative Example: Comparative Example 1, an ink, comprising a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 15 parts of polyvinyl alcohol; 10 parts of wax emulsion; 30 parts of slow solvent; Titanium dioxide 10 parts; 30 parts of deionized water The ink coating layer comprises the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 15 parts of titanium dioxide; 50 parts of deionized water.

[0116] The D50 particle size of the titanium dioxide is 0.5 μm.

[0117] The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2.

[0118] The UV photoinitiator was UV photoinitiator 1173.

[0119] A decorative paper prepared with the above ink comprises a fiber base paper and a pre-coating layer and an ink coating layer sequentially coated on the fiber base paper.

[0120] A production process of the above decorative paper comprises the following steps: S1: Dissolve polyvinyl alcohol in deionized water, heat and stir at 80°C until completely dissolved, then add wax emulsion and slow-drying solvent, stir evenly, then add titanium dioxide, and continue stirring until a stable milky white pre-coating layer coating liquid is formed; apply the pre-coating layer coating liquid on the fiber base paper substrate, control the thickness to 20 microns, and dry naturally for 30 minutes.

[0121] S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 seconds; S3: The decorative paper coated with two layers was preliminarily dried at 40°C for 20 minutes, and then the temperature was increased to 80°C for deep drying for 30 minutes.

[0122] Comparative Example 2, an ink, including an ink coating layer, the ink coating layer includes the following components in parts by weight: Acrylate resin 20 parts; 5 parts of UV photoinitiator; 15 parts of titanium dioxide; 50 parts of deionized water.

[0123] The D50 particle size of the titanium dioxide is 0.5 μm.

[0124] The UV photoinitiator was UV photoinitiator 1173.

[0125] A decorative paper prepared with the above ink comprises a fiber base paper and an ink coating layer coated on the fiber base paper.

[0126] A production process of the above decorative paper comprises the following steps: S1: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to 20 microns; use UV lamp to irradiate intermittently for 5 seconds; S2: The decorative paper coated with two layers was preliminarily dried at 40°C for 20 minutes, and then the temperature was increased to 80°C for deep drying for 30 minutes.

[0127] Detection method: The following tests were performed on Examples 1 to 8 and Comparative Examples 1 to 2. The test results are shown in Table 1.

[0128] 1. Coating adhesion test Method: Use the 100-grid test method (ASTM D3359) to scratch a grid pattern on the surface of the decorative paper with a knife, then use tape to stick and tear it off, and observe the shedding of the coating.

[0129] 2. Wear resistance test Method: Use Taber abrasion tester to test, place the decorative paper on the equipment and perform a certain number of friction cycles to observe the surface wear (ASTM D4060).

[0130] 3. Weather resistance test Method: Use a xenon lamp weathering test chamber to conduct a comprehensive test of UV light, humidity and temperature to simulate a long-term sun and rain environment and observe color changes and coating performance (ASTM G155).

[0131] 4. Whiteness and color saturation test Method: Whiteness (ISO 2470) and color difference were measured using a whiteness meter and a colorimeter to evaluate the effect of titanium dioxide on improving the whiteness and color performance of paper surface.

[0132] 5. Determination of drying time Method: The drying time was measured using a laboratory drying instrument to observe the drying speed of the coating at different stages (ASTM D1640).

[0133] Table 1

[0134] The above test results show that the ink decorative paper prepared by the present invention has a better drying effect, and the ink coating after drying is more weather-resistant, wear-resistant and scratch-resistant, the overall drying quality is better, and the interior of the ink coating is more uniform.

[0135] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An ink, characterized in that: It comprises a pre-coating layer and an ink coating layer, wherein the pre-coating layer comprises the following components in parts by weight: 15-20 parts of polyvinyl alcohol; 10-13 parts wax emulsion; 30-35 parts of slow solvent; 10-15 parts of titanium dioxide; 30-40 parts of deionized water The ink coating layer comprises the following components in parts by weight: 20-30 parts of acrylate resin; 5-7 parts of UV photoinitiator; 3-5 parts of double-layer slow-release quick-drying agent; 15-20 parts of titanium dioxide; 50-60 parts of deionized water.

2. An ink according to claim 1, characterized in that: The double-layer sustained-release quick-drying agent comprises inner-layer particles and an outer covering layer, wherein the inner-layer particles are sustained-release particles with ethanol as a core solvent and hydroxypropyl methylcellulose as a coating material, and the outer covering layer is selected from polyvinyl alcohol or polyethylene glycol.

3. An ink according to claim 2, characterized in that: The inner layer particles are prepared by comprising the following components in parts by weight; 5-8 parts of ethanol; Polylactic acid 5-10 parts; Polyvinyl alcohol 0.5-2 parts 100-120 parts of dichloromethane; 100-130 parts of deionized water.

4. An ink according to claim 3, characterized in that: The preparation method of the inner layer particles is as follows: Step A: dissolving polylactic acid in dichloromethane to obtain solution A, and adding ethanol to solution A and stirring to obtain solution B; Step B: polyvinyl alcohol and deionized water are uniformly mixed to obtain solution C, solution B is added dropwise to solution C and emulsified using a high-speed stirrer or ultrasonic dispersing equipment; Step C: at 10-15° C., slowly evaporate dichloromethane and filter to obtain inner layer particles.

5. An ink according to claim 2, characterized in that: The preparation steps of the double-layer slow-release quick-drying agent are as follows: Step 1: preparing inner layer particles; Step 2: Use a casting method or a spraying method to cover the outer covering layer material on the surface of the inner layer particles.

6. An ink according to claim 1, characterized in that: The pre-coating layer further comprises 5 to 8 parts by weight of talc.

7. An ink according to claim 1, characterized in that: The D50 particle size of the titanium dioxide is 0.2-0.5 μm.

8. An ink according to claim 1, characterized in that: The slow solvent is a mixture of xylene and butyl acetate in a mass ratio of 1:2-3.

9. A highly simulated paint-like decorative paper prepared according to the ink according to any one of claims 1 to 8, characterized in that: The invention comprises a fiber base paper and a pre-coating layer and an ink coating layer which are sequentially coated on the fiber base paper.

10. A process for producing decorative paper according to claim 9, characterized in that: The following steps are involved: S1: dissolving polyvinyl alcohol in deionized water, heating and stirring at 80°C until completely dissolved, then adding wax emulsion and slow-drying solvent, stirring evenly, then adding titanium dioxide, and continuously stirring until a stable milky white pre-coating coating liquid is formed; coating the pre-coating coating liquid on the fiber base paper substrate, controlling the thickness to be 10 to 20 microns, and drying naturally for 30 minutes; S2: Mix acrylate resin and titanium dioxide and stir evenly; add UV photoinitiator and double-layer slow-release quick-drying agent, mix to form a uniform coating liquid; apply the coating liquid on the dried inner layer, and control the thickness to be 5 to 10 microns; use UV lamp to irradiate intermittently for 5 to 10 seconds; S3: Preliminarily dry the decorative paper coated with two layers at 40° C. for 20 to 30 minutes, and then increase the temperature to 80 to 100° C. for deep drying for 30 to 40 minutes.

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