Bottom penetration prevention water-based ink for decorative paper and manufacturing process of bottom penetration prevention water-based ink

Abstract

The invention relates to the technical field of printing ink, and discloses anti-bottom-penetration water-based ink for decorative paper and a manufacturing process, the anti-bottom-penetration water-based ink comprises a component A which is coated on the surface of a base material and forms a pretreatment layer, and a component B which is coated on the surface of the pretreatment layer and forms a printing layer; wherein the component A is prepared from the following components in percentage by weight: 5 to 20 percent of titanium dioxide, 20 to 35 percent of water-based acrylic resin, 5 to 15 percent of auxiliary agent, and the auxiliary agent contains attapulgite and the balance of water. According to the present invention, the water-based ink with the two-component system is adopted, and the pretreatment layer is formed between the base material and the printing layer through the respective use, such that the excellent inhibition effect on the bottom penetration problem of the low-gram-weight facing base paper is provided.

Description

Technical Field

[0001] The present application relates to the technical field of printing inks, and in particular to an anti-see-through water-based ink for decorative paper and a manufacturing process. Background Art

[0002] Veneer decorative panels have become a highly common material in current architectural decoration, developed to replace logs and reduce ecological damage. Veneer decorative panels are made from a composite of decorative paper and wood-based panels. Reducing the grammage of the veneer base paper can lower the unit price and improve price competitiveness. However, low-weight veneer base paper often suffers from poor coverage of the base color during the lamination process, resulting in "show-through" of the veneer panels, unclear patterns, and dull colors.

[0003] Existing technologies address the "show-through" phenomenon by adjusting the ink components and adding large doses of titanium dioxide to utilize its hiding properties. However, titanium dioxide, as an additive, does not cause obvious color cast when the ink itself is light-colored. However, due to its excellent hiding properties in dark colors, it can cause obvious color cast in the final printed pattern. Summary of the Invention

[0004] In order to overcome the problem of the base color showing through during the pressing process after the low-weight decorative paper is printed with a pattern, the present application provides an anti-show-through water-based ink and a manufacturing process for decorative paper.

[0005] In a first aspect, the present application provides an anti-see-through water-based ink for decorative paper, which adopts the following technical solution: The invention discloses an anti-see-through water-based ink for decorative paper, comprising: a component A coated on the surface of a substrate to form a pretreatment layer, and a component B coated on the surface of the pretreatment layer to form a printing layer; wherein the component A comprises 5-20 wt% of titanium dioxide, 20-35 wt% of a water-based acrylic resin, and 5-15 wt% of an additive containing attapulgite, with the balance being water.

[0006] The water-based ink of the present application is divided into two separate components, both of which are also used separately. Usually, component A is first used to form a pretreatment layer on the surface of the substrate (decorating base paper). The pretreatment layer only requires uniformity and does not require full coverage of the substrate. Component A can be used to form the pretreatment layer by spraying or printing; component B can be used after component A is used.

[0007] In this application, the additives include at least dispersants, defoamers, wetting agents, pH regulators, rheological additives, preservatives and cosolvents. One or more of them can be selected for use at the same time, or none of them can be selected. In addition, the additives also include the required attapulgite, the particle size of the attapulgite does not exceed 5 μm, and the amount of attapulgite used is correspondingly less than that of titanium dioxide.

[0008] By adopting the above technical solution, a small amount of component A is used to form a pretreatment layer before printing. When a smaller amount of titanium dioxide is used, it is coordinated with attapulgite to significantly overcome the problem of ink printing showing through.

[0009] Optionally, the mass ratio of attapulgite to titanium dioxide is 1:(5-15). Within this range, the mass ratio of attapulgite to titanium dioxide can be any value, such as 1:5, 1:8, 1:12, 1:12.5, and 1:15.

[0010] By adopting the above technical solution, it is possible to ensure that the adhesion performance of the printing layer is relatively stable while overcoming the problem of ink printing showing through.

[0011] Optionally, the mass ratio of the attapulgite to titanium dioxide is 1:10.

[0012] By adopting the above technical solution, the adhesion of the printing layer is optimized under the premise of overcoming the problem of ink printing showing through.

[0013] Optionally, the usage ratio of component A to component B per unit area is 1:(10~15). Within this range, the usage ratio of component A to component B can be any value, such as 1:10, 1:11, 1:12, 1:13, 1:14, and 1:15.

[0014] By adopting the above technical solution, the dosage relationship between component A and component B is controlled, thereby avoiding the occasional problem of ink printing showing through due to excessive use of component B and the problem of reduced pattern printing quality due to excessive use of component A.

[0015] In a specific preferred embodiment, component A includes 5 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 0.5 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0016] In another specific preferred embodiment, the A component includes 5 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0017] In another specific preferred embodiment, the A component includes 10 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0018] In a second aspect, the present application provides a process for manufacturing an anti-see-through water-based ink for decorative paper, which adopts the following technical solution: The invention relates to an anti-see-through water-based ink for decorative paper and a manufacturing process thereof, wherein the manufacturing process includes different processes for component A and component B, wherein the manufacturing process for component A is as follows: (1-1) After mixing deionized water and water-based acrylic resin, attapulgite and additives are added; (1-2) Grind and add titanium dioxide in stages, adding 30% and 70% of titanium dioxide in two steps; (1-3) Stir and disperse evenly to obtain component A.

[0019] The process of component B is: The water-based acrylic resin, additives, pigment and water are stirred uniformly to obtain component B.

[0020] By adopting the above technical solution, especially the process of component A, the dispersion and stability of titanium dioxide in the component system can be guaranteed, and the problem of titanium dioxide agglomeration resulting in uneven distribution of titanium dioxide in the pretreatment layer formed will not occur. In other words, it is more conducive to the pretreatment layer to prevent the ink from showing through the bottom.

[0021] Optionally, in step (1-2), a ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added; After 30% titanium dioxide is added, continue grinding for 1 hour; Reduce the linear speed to 10 m / s and grind and add the remaining titanium dioxide until the titanium dioxide is added.

[0022] By adopting the above technical solution, the grinding speed is controlled and the batch addition of titanium dioxide is coordinated. A small amount of titanium dioxide is added under high-speed grinding conditions to quickly disperse the titanium dioxide in the component system, and then the remaining titanium dioxide is added under lower-speed grinding conditions to fully disperse the titanium dioxide.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. A two-component water-based ink system is used to form a pre-treatment layer between the substrate and the printing layer. This has an excellent effect in suppressing the bottom see-through problem of low-weight finishing paper. 2. Control the mass ratio of attapulgite to titanium dioxide to ensure that the adhesion of the printed layer is relatively stable while overcoming the problem of ink printing showing through; 3. Control the dosage relationship between component A and component B to avoid occasional problems such as ink showing through due to excessive use of component B, and reduced pattern printing quality due to excessive use of component A. DETAILED DESCRIPTION

[0024] The following describes in detail the embodiments of the present application.

[0025] Throughout this specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0026] Unless otherwise specified, the components used in the following examples and comparative examples were purchased from commercial sources.

[0027] Attapulgite was purchased from Shanghai MacLean Biochemical Technology Co., Ltd., CAS No. 12174-11-7, Product No. A921976.

[0028] Titanium dioxide was purchased from Shanghai Jizhi Biochemical Technology Co., Ltd., CAS No. 13463-67-7, product No. T23304.

[0029] Example 1. The water-based ink in this example includes components A and B. Component A is first applied to the surface of the substrate in actual application to form a pretreatment layer on the surface of the substrate, and then component B is used on the pretreatment layer. Component B can be prepared using existing methods and formulas, and its components and component ratios are actually selected according to the requirements of the specific printing pattern.

[0030] In this embodiment, component A includes 5 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 0.5 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0031] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0032] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0033] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0034] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0035] Example 2. In this example, component A includes 10 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 0.5 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0036] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0037] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0038] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0039] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0040] Example 3. In this example, component A includes 15 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 0.5 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0041] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0042] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0043] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0044] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0045] Example 4. In this example, component A includes 20 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 0.5 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0046] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0047] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0048] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0049] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0050] Example 5. In this example, component A includes 5 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0051] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0052] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0053] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0054] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0055] Example 6. In this example, component A includes 10 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0056] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0057] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0058] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0059] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0060] Example 7. In this example, component A includes 15 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0061] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0062] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0063] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0064] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0065] Example 8. In this example, component A includes 20 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0066] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0067] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0068] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0069] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0070] Comparative Example 1: This comparative example contains only component B, which includes 15 wt% of phthalocyanine blue, 30 wt% of aqueous acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0071] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0072] Comparative Example 2. In this embodiment, component A includes 5 wt% of titanium dioxide, 20 wt% of aqueous acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0073] Polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are all components of the auxiliary agent.

[0074] Weigh the above components according to the required proportions and set aside for use; mix deionized water, water-based acrylic resin, and titanium dioxide and disperse them evenly to obtain component A.

[0075] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0076] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0077] Comparative Example 3. This comparative example contains only component B, which includes 20 wt% of titanium dioxide, 1 wt% of attapulgite, 15 wt% of phthalocyanine blue, 30 wt% of aqueous acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0078] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0079] In Application Example 1, the inks of Examples 1 to 8 and Comparative Example 1 were used for printing on decorative base paper, respectively. The usage (volume) ratio of component A to component B was 1:10, and the total thickness of the layer was 10 μm. The transparency after printing was observed. The results are shown in Table 1.

[0080] The base paper for facing is purchased from Zhejiang Xiawang Paper Co., Ltd., with a gram weight of 60 g / m², ash content of 25%, and white color.

[0081]

[0082] Table 1 In Table 1, “√” indicates that the bottom is visible, and “×” indicates that the bottom is not visible. The adhesion is obtained using the 100-grid test method specified in the ASTM D3359 standard.

[0083] Combined with Table 1, it can be seen that compared with Comparative Example 1, the B component used in Examples 1 to 8 of the present application to form a pretreatment layer can significantly improve the problem of bottom see-through; while in Comparative Example 2, only a small amount of titanium dioxide is added, which cannot overcome the problem of bottom see-through in ink printing. It is not clearly recorded that there is a means of increasing the titanium dioxide content alone to overcome the problem of bottom see-through in ink printing. At the same time, the titanium dioxide will agglomerate and affect the bonding strength and wear resistance of the printed layer; in Comparative Example 3, 20 wt% of titanium dioxide and 1 wt% of attapulgite were added to the conventional water-based ink component system. Although the bottom see-through phenomenon did not occur and the adhesion performance was good, the pattern color would have a more obvious color cast. Compared with Example 8 with the same addition amount, no color cast occurred.

[0084] On the other hand, in Comparative Examples 1 to 4 and Examples 5 to 8, it was found that as the mass ratio of titanium dioxide to attapulgite increased, the adhesion of the printed layer was also negatively affected, which affected the life of the printed layer. When the mass ratio of titanium dioxide to attapulgite was within the range of 1: (5 to 15), the adhesion performance of the printed layer was relatively stable, reaching at least 4B, and when the mass ratio was 1:10, the adhesion performance of the printed layer was optimal.

[0085] The surface active groups (such as -Si-OH) of attapulgite can adsorb titanium dioxide and prevent it from settling and agglomerating in the components. At the same time, the grinding and segmented addition methods adopted in the process can promote the uniform dispersion of titanium dioxide. The attapulgite itself has a microporous structure that can scatter light, and can also synergize with titanium dioxide to enhance hiding power. Therefore, adding a trace amount (0.5 wt%) of attapulgite to the comparative example 2 can significantly improve the bottom transparency. The porous structure of the attapulgite itself enables the pretreatment layer formed on the substrate to have an adsorption and retention effect, which can directly reduce the excessive penetration of ink on the paper surface. At the same time, its adsorption of moisture can quickly reduce the moisture content of the printed layer formed later, increase the drying speed of the ink, and play an auxiliary role in preventing the bottom transparency of the ink.

[0086] Application Example 2: The ink of Example 6 is used for printing on decorative base paper. The usage (volume) ratio of component A to component B is 1:12, the total thickness of the layer is 10 μm, and the bottom transparency after printing is observed.

[0087] Application Example 3: The ink of Example 6 is used for printing on decorative base paper, with the usage (volume) ratio of component A to component B being 1:15 and the total thickness of the layer being 10 μm. The bottom transparency after printing is observed.

[0088] Application Example 4: The ink of Example 6 is used for printing on decorative base paper, with the usage (volume) ratio of component A to component B being 1:16, and the total thickness of the layer being 10 μm. The bottom transparency after printing is observed.

[0089] The facing base paper was purchased from Zhejiang Xiawang Paper Co., Ltd., with a gram weight of 60 g / m², an ash content of 25%, and a white color. The results are shown in Table 2.

[0090]

[0091] Table 2 In Table 2, “√” indicates that the bottom is visible, and “×” indicates that the bottom is not visible. The adhesion was obtained using the 100-grid test method specified in the ASTM D3359 standard.

[0092] Combined with Table 2, it can be seen that the amount of component A and component B has a certain matching range relationship. Obviously, this application relies on forming a pretreatment layer between the substrate and the printing layer to overcome the problem of ink printing through. When component B is used in excess, it will affect the effect of component A. Therefore, in this application, when the amount of component A is 1 part (by volume), the amount of component B should generally not exceed 15 parts (by volume).

[0093] On the other hand, the ink of the present application is intended for printing to obtain a pattern, so the amount of component A should also be limited to avoid affecting the printing effect. When the amount of component A used is 1 part (by volume), the amount of component B used is generally not less than 10 parts (by volume). Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are illustrative and should not be construed as limiting the present application. Persons of ordinary skill in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

[0094] Example 9. In this example, component A includes 20 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0095] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0096] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 20% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0097] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0098] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0099] Example 10. In this example, component A includes 20 wt% of titanium dioxide, 20 wt% of aqueous acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0100] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0101] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 10% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0102] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0103] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0104] Example 11. In this example, component A includes 20 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0105] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0106] The above components are weighed and prepared in proportion. After deionized water and water-based acrylic resin are mixed, attapulgite and additives are added. A ball mill is used to grind at a linear speed of 25 m / s and 40% titanium dioxide is added. After 30% titanium dioxide is added, grinding is continued for 1 hour. The linear speed is reduced to 10 m / s and the remaining titanium dioxide is added. After the titanium dioxide is added, the mixture is stirred and dispersed evenly to obtain component A.

[0107] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0108] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0109] Comparative Example 4. In this embodiment, component A includes 20 wt% of titanium dioxide, 20 wt% of aqueous acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0110] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0111] The above components are weighed and prepared in proportion, deionized water and water-based acrylic resin are mixed, and attapulgite and additives are added; titanium dioxide is completely added by grinding at a linear speed of 25 m / s using a ball mill, and stirred and dispersed evenly to obtain component A.

[0112] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0113] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0114] Comparative Example 5. In this embodiment, component A includes 20 wt% of titanium dioxide, 20 wt% of aqueous acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0115] Attapulgite, polyacrylate, tert-butyldiethanolamine, cellulose ether and ethanol are components of the auxiliary agent.

[0116] The above components are weighed and prepared in proportion, deionized water and water-based acrylic resin are mixed, and attapulgite and additives are added; titanium dioxide is completely added by grinding at a linear speed of 10 m / s using a ball mill, and stirred and dispersed uniformly to obtain component A.

[0117] In this embodiment, component B includes 15 wt% of phthalocyanine blue, 30 wt% of water-based acrylic resin, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

[0118] After weighing the above raw materials according to the required proportion, stir the components evenly to obtain component B.

[0119] In Application Example 5, the inks of Examples 9 to 12 are used for printing on decorative base paper, with the usage (volume) ratio of component A to component B being 1:10 and the total thickness of the layer being 10 μm. The transparency after printing is observed.

[0120] The facing base paper was purchased from Zhejiang Xiawang Paper Co., Ltd., with a gram weight of 60 g / m², an ash content of 25%, and a white color. The results are shown in Table 3.

[0121]

[0122] Table 3 In Table 3, “√” indicates that the bottom is visible, and “×” indicates that the bottom is not visible. The adhesion was obtained using the 100-grid test method specified in the ASTM D3359 standard.

[0123] Combined with Table 3, it can be seen that in the process of preparing water-based ink, especially in the manufacturing process of its A component, due to the high surface energy of titanium dioxide, coupled with the intermolecular van der Waals force and hydrogen bond adsorption, when the titanium dioxide addition amount is large (generally exceeding 10 wt%), all-in addition will cause titanium dioxide agglomeration due to untimely dispersion, resulting in a negative impact on the adhesion of the printed layer. Therefore, the grade when testing adhesion is generally not higher than 3B. The method of adding in batches can avoid this problem, and the more reasonable batch ratio is 20~30% for the first time. The rest can be added at once or in two or three times.

Claims

1. Anti-see-through water-based ink for decorative paper, characterized in that: include: Component A is coated on the surface of the substrate to form a pretreatment layer, and component B is coated on the surface of the pretreatment layer to form a printing layer; wherein component A includes 5-20 wt% of titanium dioxide, 20-35 wt% of water-based acrylic resin, 5-15 wt% of an additive, the additive contains attapulgite, and the balance is water.

2. The anti-see-through water-based ink for decorative paper according to claim 1, characterized in that: The mass ratio of the attapulgite to titanium dioxide is 1: (5-15).

3. The anti-see-through water-based ink for decorative paper according to claim 1, characterized in that: The mass ratio of the attapulgite to titanium dioxide is 1:

10.

4. The anti-see-through water-based ink for decorative paper according to claim 1, characterized in that: The usage ratio of component A to component B per unit area is 1: (10~15).

5. The anti-see-through water-based ink for decorative paper according to claim 1, characterized in that: The invention comprises a dispersant, a defoaming agent, a wetting agent, a pH regulator, a rheological additive, a preservative and a solvent.

6. The anti-see-through water-based ink for decorative paper according to claim 1, characterized in that: The component A includes 5 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 0.5 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water; Or the A component includes 5 wt% titanium dioxide, 20 wt% water-based acrylic resin, 1 wt% attapulgite, 2 wt% polyacrylate as a dispersant, 1 wt% tert-butyldiethanolamine for adjusting pH, 1 wt% cellulose ether, 5 wt% ethanol, and the balance is water; Or the A component includes 10 wt% of titanium dioxide, 20 wt% of water-based acrylic resin, 1 wt% of attapulgite, 2 wt% of polyacrylate as a dispersant, 1 wt% of tert-butyldiethanolamine for adjusting pH, 1 wt% of cellulose ether, 5 wt% of ethanol, and the balance is water.

7. A process for producing an anti-see-through water-based ink for decorative paper, characterized in that: The manufacturing process is used to manufacture the water-based ink according to any one of claims 1 to 6, and the manufacturing process is: (1-1) After mixing deionized water and water-based acrylic resin, attapulgite and additives are added; (1-2) Grind and add titanium dioxide in stages, adding 30% and 70% of titanium dioxide in two steps; (1-3) Stir and disperse evenly to obtain component A; The water-based acrylic resin, additives, pigment and water are stirred uniformly to obtain component B.

8. The process for producing the anti-see-through water-based ink for decorative paper according to claim 7, characterized in that: In the step (1-2), a ball mill is used to grind at a linear speed of 25 m / s and 30% titanium dioxide is added; After 30% titanium dioxide is added, continue grinding for 1 hour; Reduce the linear speed to 10 m / s and grind and add the remaining titanium dioxide until the titanium dioxide is added.

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