One-step coated Bible paper and production process thereof

Abstract

The invention relates to the technical field of papermaking, and particularly provides one-step coated Bible paper and a production process thereof, and the production process comprises the following steps: S100, carrying out gas purging and plasma activation treatment on base paper to obtain activated base paper; s200, water-based paint is applied to the two faces of the activated base paper, and a wet blank is obtained; and S300, carrying out drying treatment and soft calendering treatment on the wet blank to obtain the Bible paper. Plasma activation and gas purging pretreatment are introduced to the surface of the base paper, so that the hydrophilicity of the fiber surface and the adhesive force of the coating are effectively improved; then, the two surfaces are simultaneously coated with high-solid-content nano calcium carbonate modified water-based paint, and infrared, hot air and UV three-section drying and constant-temperature soft calendering treatment are sequentially performed, so that the surface smoothness, the barrier property and the wear resistance of the paper are remarkably improved, the coating process is simplified, and the drying period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of papermaking, and in particular to a one-step coated Bible paper and a production process thereof. Background Art

[0002] Bible paper is an ultra-thin, high-whiteness, smoothness, and wear-resistant specialty printing paper. It is widely used in applications such as Bibles, dictionaries, and full-size books, requiring extensive display space and demanding paper thickness and ease of reading and writing. Traditional step-by-step coating processes are not only cumbersome and require significant equipment floor space, but also suffer from limited adhesion between the coating and the base paper after layered coating, making it prone to cracking and peeling, which can affect the paper's printability and long-term storage properties.

[0003] Therefore, there is an urgent need for a Bible paper preparation technology that is simple in process, energy-efficient and efficient, has strong coating adhesion, and can be coated in a single continuous process. Summary of the Invention

[0004] The present invention provides a one-step coated Bible paper and a production process thereof. By introducing plasma activation and gas purging pretreatment on the surface of the base paper, the hydrophilicity of the fiber surface and the adhesion of the coating are effectively improved. Subsequently, a high-solid nano-calcium carbonate-modified water-based coating is simultaneously applied to both sides. The paper is then dried in three stages: infrared, hot air, and UV, and subjected to constant-temperature soft calendering treatment. This significantly improves the surface smoothness, barrier properties, and abrasion resistance of the paper, simplifies the coating process, and shortens the drying cycle.

[0005] The present invention provides a one-step production process for coating Bible paper, comprising the following steps: S100, subjecting base paper to gas purging and plasma activation treatment to obtain activated base paper; S200, applying water-based coating to both sides of the activated base paper to obtain a wet base paper; S300, subjecting the wet base paper to drying treatment and soft calendering treatment to obtain Bible paper.

[0006] In any of the above technical solutions, in step S100, the gas purge uses a nitrogen-oxygen mixed gas containing 20-30 vol% oxygen; the power density of the plasma activation treatment is 6-8 W / cm 2 , paper feeding speed is 160-180m / min.

[0007] In any of the above technical solutions, in step S100, the gas used for plasma activation treatment is a mixed gas of argon and oxygen, wherein the oxygen accounts for 5-10 vol%.

[0008] In any of the technical solutions above, in step S200, the water-based paint solid content is 60-65 wt%, and the water-based paint comprises the following components: 40-60 parts of surface-modified nano calcium carbonate, 20-30 parts of water-based polyurethane emulsion, 15-25 parts of carboxyl styrene-butadiene latex, 0.5-1.5 parts of crosslinking aid, 0.3-0.8 parts of non-ionic surfactant, 0.5-1 part of sodium carboxymethyl cellulose, and the balance is water.

[0009] In any of the technical solutions above, the preparation method of the surface-modified nano calcium carbonate comprises the following steps: S001, adding lime milk into a reaction kettle and introducing CO2 to obtain nano calcium carbonate suspension; S002, adding a stabilizer into the nano calcium carbonate suspension to perform first stirring treatment to obtain nano calcium carbonate slurry; S003, heating stearic acid to melting, adding an emulsifier to perform second stirring treatment to obtain a modifier; S004, injecting the modifier into the nano calcium carbonate slurry to perform third stirring treatment, dehydration treatment, drying treatment, and crushing treatment to obtain the surface-modified nano calcium carbonate.

[0010] In any of the technical solutions above, in step S002, the stabilizer comprises at least one of disodium EDTA, NTA, EDTMPS, and sodium alginate; and / or in step S002, the first stirring treatment is performed for 20-30 min; and / or in step S003, the emulsifier comprises at least one of sodium dodecyl benzene sulfonate and diglycerol polypropylene glycol ether; and / or in step S003, the second stirring treatment is performed for 10-30 min; and / or in step S004, the third stirring treatment is performed for 30-60 min at a rotation speed of 150-300 rpm.

[0011] In any of the technical solutions above, in step S200, the single-side coating amount applied is 4.5-5.5 g / m 2 , and the total coating amount is 9-11 g / m 2 ; the application temperature is 28-32℃.

[0012] In any of the technical solutions above, in step S300, the drying treatment comprises infrared pre-drying, hot air drying, and UV curing drying; wherein the infrared pre-drying is performed by an infrared lamp with a wavelength of 800-900 nm; the hot air drying is performed at a temperature of 90-110℃ and a wind speed of 3-7 m / s; and the UV curing drying is performed by ultraviolet light with a wavelength of 250-255 nm and an energy density of 100-120 mJ / cm 2 .

[0013] In any of the technical solutions above, in step S300, the soft calendering treatment is performed at a temperature of 80-100℃ and a line pressure of 60-100 kN / m.

[0014] The application provides a one-step coating method for Bible paper, and the Bible paper is prepared by using the one-step coating method for Bible paper.

[0015] The technical effects achieved by the technical scheme of the application are as follows: 1. The application significantly improves the surface activity and adhesion of the base paper by using the combination of gas purging and plasma activation pretreatment, and realizes one-step simultaneous coating of both sides by using a high solid content water-based coating formula, thereby greatly shortening the process flow and drying cycle, significantly improving the production efficiency and reducing the equipment space; 2. The high solid content nano calcium carbonate modified water-based coating cooperates with the high molecular emulsion and crosslinking agent, and the efficient three-stage drying and constant temperature soft calendering treatment, so that the surface performance of the finished Bible paper is improved to meet the actual needs. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purposes, features and advantages of the application, the application will be further described in detail below in combination with specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, many specific details are set forth in order to provide a thorough understanding of the application, but the application can also be implemented in other ways different from those described herein, therefore, the protection scope of the application is not limited by the specific embodiments disclosed below.

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below.

[0019] The Bible paper belongs to a special printing paper with ultra-thin, high whiteness, high smoothness and high wear resistance, and is widely used in Bible, dictionary, full-size book and other occasions requiring a large number of pages to be displayed and requiring high paper thickness and reading comfort. The traditional step-by-step coating process not only has a complicated process flow and a large equipment area, but also has limited adhesion between the coating layer and the base paper after layered coating, and is prone to defects such as coating cracking and peeling, thereby affecting the printing adaptability and long-term preservation performance of the paper.

[0020] In order to overcome the shortcomings of the prior art, the embodiment provides a one-step coating method for bible paper and a production process thereof. The surface hydrophilicity and coating adhesion of the base paper are effectively improved by introducing plasma activation and gas blowing pretreatment on the surface of the base paper. Then, high-solid nano calcium carbonate modified water-based coating is applied to both sides of the base paper, and the paper is dried by infrared, hot air and UV drying, and then treated by constant temperature soft calendering, so that the surface smoothness, barrier property and wear resistance of the paper are significantly improved, and the coating process is simplified and the drying period is shortened.

[0021] Specifically, the production process of the one-step coating method for bible paper provided by the embodiment comprises the following steps: S100, gas blowing and plasma activation treatment is performed on the base paper to obtain an activated base paper; S200, water-based coating is applied to both sides of the activated base paper to obtain a wet embryo; S300, the wet embryo is dried and soft calendered to obtain a bible paper.

[0022] Preferably, in the gas blowing stage of step S100, nitrogen-oxygen mixed gas containing 20-30vol% oxygen is blown on the surface of the base paper, which can effectively remove residual dust, fiber fluff and small particles and other impurities. At the same time, the active oxygen radicals in the mixed gas can slightly oxidize the surface of the fiber to generate a small amount of hydroxyl and carboxyl groups, thereby improving the initial hydrophilicity of the base paper and laying a good foundation for subsequent plasma treatment.

[0023] Further, when entering the plasma activation stage, high-energy ions and electrons collide with the surface of the base paper at a power density of 6-8W / cm 2 , so that the surface of the base paper forms a nano-scale concave-convex structure, and the specific surface area is significantly increased. At the same time, the active oxygen species will react with the carbon-hydrogen bond or hydroxyl group on the fiber chain when 5-10vol% oxygen is added to the plasma gas, so that more hydrophilic polar functional groups are introduced, and the surface energy of the base paper is further improved.

[0024] In general, the application of the two pretreatment processes can ensure good wettability and uniformity of the coating during the spreading stage, and can also form firm "mechanical interlocking" and "chemical bonding" adhesion after solidification. Due to the improvement of surface activity and roughness, a uniform and dense coating layer can be formed by one-time coating, which reduces the need for multiple coating and repeated adjustment of viscosity, thereby shortening the overall production cycle.

[0025] In addition, as a low-temperature dry process, plasma activation does not require additional chemical modifiers, significantly reducing the use of organic solvents and waste gas emissions, and achieving energy saving and environmental protection. In the final product, this pretreatment greatly improves the surface smoothness, wear resistance and permeability resistance, providing reliable protection for the printing adaptability and long-term storage stability of high-end bible paper.

[0026] Preferably, in step S200, the water-based paint solid content is 60-65wt%, which can ensure sufficient coating thickness for one-time coating, and avoid affecting the film forming quality; the surface modified nano calcium carbonate as the main filler not only significantly improves the hiding power and whiteness of the coating, but also forms a dense network filling structure on the base paper surface through fine particles, greatly enhancing the barrier property and wear resistance. The flexible water-based polyurethane emulsion and carboxyl styrene-butadiene latex synergistically act, the former gives the coating excellent mechanical tensile property and folding resistance, and the latter improves the initial film forming speed and adhesion, so that the coating can still tightly "engage" the base paper in the rapid drying process. The crosslinking aid initiates crosslinking reaction in the UV curing stage, forming a three-dimensional network structure, further improving the anti-swelling property and moisture resistance stability of the coating film. The non-ionic surfactant can reduce the interfacial tension, promote the rapid spreading of the high filler system on the base paper; the sodium carboxymethyl cellulose can realize uniform particle suspension and prevent sedimentation by increasing the solution viscosity, and provide slight rheological control in the film forming process to avoid coating sagging or missing.

[0027] Further, the preparation of the surface modified nano calcium carbonate, lime milk is added to the reaction kettle, and CO2 is introduced to obtain a nano calcium carbonate suspension; then EDTA disodium, NTA, EDTMPS or sodium alginate and other stabilizers are added, and 20-30min stirring is carried out to avoid particle agglomeration and maintain a narrow particle size distribution. The modified agent is prepared by mixing molten stearic acid with emulsifier in the second stirring for 10-30min, and when it is injected into the calcium carbonate slurry and stirred at 150-300rpm for 30-60min, the stearic acid molecules are oriented and adsorbed on the surface of the calcium carbonate, forming a uniform organic coating layer. The finally obtained modified nano calcium carbonate with good primary dispersion and surface hydrophilic / hydrophobic balance can be stably suspended in the water-based system for a long time, and tightly combined with the polymer network after coating and film forming. Through the above modification process, the entire coating system has both the production efficiency brought by high solid content and the functionality of modified nano filler, so that one-step coating can realize high-quality surface smoothness and mechanical properties, and maintain the stability and environmental friendliness of high-speed continuous production.

[0028] Further, in step S200, the single-sided coating amount applied is 4.5-5.5g / m 2 , and the total coating amount is 9-11g / m 2, the coating can achieve the required thickness to provide excellent hiding power, barrier properties, and abrasion resistance, without the problem of cracking or peeling caused by overly thick coatings. The moderate coating thickness ensures that the coating can penetrate the fibers of the base paper while still forming a continuous, dense film on the surface, fully leveraging the synergistic reinforcement effect of the surface-modified nano-calcium carbonate and the polymer network, which is crucial for improving the paper's friction resistance and anti-permeation properties. Controlling the application temperature between 28-32°C can maintain the viscosity and rheological properties of the coating at an optimal state. This temperature range allows the polymer dispersion and nanofiller in the aqueous system to maintain good suspension, avoiding excessive viscosity caused by low temperatures that results in uneven pumping or spreading; it also prevents excessive temperatures from causing rapid water loss and premature film formation, which affects the full spreading of particles and the full extension of polymer chains. Constant temperature application helps the coating form a uniform wet film on the base paper surface, laying a key foundation for smooth film formation in the subsequent drying stage.

[0029] Preferably, in the infrared pre-drying stage, an infrared lamp in the 800-900nm band first quickly heats the surface of the wet embryo, causing the moisture on the surface of the coating to evaporate quickly, forming a layer of preliminary cured "film". Since the infrared radiation in this band has a deeper penetration, it can simultaneously heat the interface between the coating and the base paper, effectively preventing the surface from hardening prematurely and causing moisture retention in the bottom layer, thereby reducing the generation of cracks and bubbles. Then it enters the hot air drying stage with a temperature of 90-110°C and a wind speed of 3-7m / s. The uniform and high-speed hot air transfers heat through convection, further removing the moisture inside the coating. At the same time, the shearing effect brought by the wind speed is used to slightly smooth the tiny wrinkles of the coating, significantly improving the surface smoothness. The final UV curing and drying utilizes ultraviolet rays in the band of 250-255nm and an energy density of 100-120mJ / cm 2 , triggering a photochemical reaction between the crosslinking aid and the aqueous polyurethane emulsion in the coating, rapidly forming a three-dimensional crosslinked network. This network structure not only significantly improves the coating's hardness and abrasion resistance, but also enhances its resistance to moisture, heat, and solvents. Because UV curing is an instantaneous reaction, the entire process introduces virtually no additional thermal stress, further ensuring dimensional stability and low deformation of the paper.

[0030] Further, in the soft calendering process, the wet embryo after coating and curing is sent to the soft calender at a constant temperature of 80-100°C, the high molecular network in the coating is softened, and it presents a certain plasticity under the condition of heating. At this time, the mobility between the high molecular chain segments is enhanced, which can better flow and fill the small pits in the subsequent pressing process, thereby further improving the surface smoothness and gloss. When the paper slowly passes between the two groups of soft calendering rollers at a linear pressure of 60-100 kN / m, the micro elastic deformation of the roller surface exerts uniform mechanical pressing on the coating. On the one hand, this moderate pressure can make the nano calcium carbonate particles and the high molecular network more closely "locked" together, eliminating residual pores and micro cracks; on the other hand, it can also modify the coating surface at the nano scale with the help of the roller surface texture, creating a delicate and soft matte or semi-gloss effect.

[0031] Embodiment 1 The embodiment provides a one-step method for coating bible paper and a preparation method thereof, which comprises the following steps: S100, the base paper is subjected to gas blowing with a nitrogen-oxygen mixed gas containing 25vol% oxygen and a mixed gas of argon and oxygen, wherein the oxygen accounts for 8vol%, and the power density is 7W / cm 2 , and the paper speed is 170m / min, to obtain an activated base paper; S200, the activated base paper is coated with water-based paint on both sides at 30°C, the single-side coating amount is 5g / m 2 , and the total coating amount is 10g / m 2 , to obtain a wet embryo; S300, the wet embryo is subjected to 850nm infrared pre-drying, 100°C hot air drying at 5m / s, and UV curing drying at 250nm and 110mJ / cm 2 , and 90°C soft calendering treatment at 80kN / m, to obtain bible paper; The water-based paint has a solid content of 62wt%, and comprises the following components: 50 parts of surface-modified nano calcium carbonate, 25 parts of water-based polyurethane emulsion, 20 parts of carboxyl styrene butadiene latex, 1 part of crosslinking aid, 0.5 part of non-ionic surfactant, 0.8 part of sodium carboxymethyl cellulose, and the balance of water; The preparation method comprises the following steps: S001, lime milk is added into a reaction kettle, and CO2 is introduced, to obtain a nano calcium carbonate suspension; S002, disodium EDTA is added into the nano calcium carbonate suspension, and is subjected to first stirring treatment for 25min, to obtain a nano calcium carbonate slurry; S003, stearic acid is heated to be melted, and sodium dodecyl benzene sulfonate is added, and is subjected to second stirring treatment for 20min, to obtain a modifier; S004, injecting the modifier into the nano-calcium carbonate slurry, performing a third stirring process at 200 rpm for 45 minutes, dehydration, drying, and crushing to obtain surface-modified nano-calcium carbonate.

[0032] Example 2 This embodiment provides a one-step coated Bible paper and a preparation method thereof, comprising the following steps: S100, the base paper is purged with a nitrogen-oxygen mixed gas containing 20 vol% oxygen and a mixed gas of argon and oxygen, wherein the oxygen accounts for 5 vol%, at a power density of 6 W / cm 2 , plasma activation treatment is performed at a paper feeding speed of 160 m / min to obtain an activated base paper; S200: Apply water-based coating on both sides of the activated base paper at 28°C, with a single-side coating amount of 4.5g / m 2 , the total coating amount is 9g / m 2 , obtain wet embryo; S300, pre-dry the wet embryo with 800nm ​​infrared, 90℃, 3m / s hot air drying and 250nm, 100mJ / cm 2 After UV curing and drying, soft calendering at 80°C and 60kN / m was performed to obtain Bible paper; The solid content of the water-based coating is 60 wt %, and the water-based coating includes the following components: 40 parts of surface-modified nano-calcium carbonate, 30 parts of water-based polyurethane emulsion, 25 parts of carboxylated styrene-butadiene latex, 1.5 parts of a cross-linking aid, 0.8 parts of a nonionic surfactant, 0.5 parts of sodium carboxymethyl cellulose, and the balance is water; The preparation method comprises the following steps: S001, adding lime milk into a reactor and introducing CO2 to obtain a nano calcium carbonate suspension; S002, adding NTA to the nano-calcium carbonate suspension, performing a first stirring treatment for 20 minutes to obtain a nano-calcium carbonate slurry; S003, heating stearic acid until melted, adding diglycerol polypropylene glycol ether, and performing a second stirring treatment for 10 minutes to obtain a modifier; S004. Inject the modifier into the nano-calcium carbonate slurry, perform a third stirring process at 150 rpm for 60 min, dehydrate, dry, and crush to obtain surface-modified nano-calcium carbonate.

[0033] Example 3 This embodiment provides a one-step coated Bible paper and a preparation method thereof, comprising the following steps: S100, the base paper is gas purged with a nitrogen-oxygen mixed gas containing 30vol% oxygen and a mixed gas of argon and oxygen, wherein the oxygen accounts for 10vol%, and is subjected to plasma activation treatment at a power density of 8W / cm 2 at a paper running speed of 180m / min, to obtain the activated base paper; S200, the activated base paper is coated with water-based paint on both sides at 32℃, the single-side coating amount is 5.5g / m 2 , the total coating amount is 11g / m 2 , to obtain a wet embryo; S300, the wet embryo is subjected to 900nm infrared pre-drying, 110℃, 7m / s hot air drying, and 255nm, 120mJ / cm 2 UV curing drying, 100℃, 100kN / m soft calendering treatment, to obtain the bible paper; The water-based paint has a solid content of 65wt%, and comprises the following components: 60 parts of surface-modified nano calcium carbonate, 20 parts of water-based polyurethane emulsion, 15 parts of carboxyl styrene latex, 0.5 parts of crosslinking aid, 0.3 parts of non-ionic surfactant, 0.5 parts of sodium carboxymethyl cellulose, and the balance is water. The preparation method comprises the following steps: S001, adding lime milk into a reaction kettle and introducing CO2 to obtain a nano calcium carbonate suspension; S002, adding sodium alginate into the nano calcium carbonate suspension, and performing first stirring treatment for 30min to obtain a nano calcium carbonate slurry; S003, heating stearic acid to melting, adding sodium dodecyl benzene sulfonate, and performing second stirring treatment for 30min to obtain a modifier; S004, injecting the modifier into the nano calcium carbonate slurry, performing third stirring treatment at 300rpm for 30min, dehydration treatment, drying treatment, and crushing treatment to obtain surface-modified nano calcium carbonate.

[0034] Comparative Example 1 This comparative example provides a one-step coated bible paper, which is obtained by outsourcing.

[0035] Test data The quantitative, thickness, smoothness, whiteness, air permeability, abrasion resistance, and tensile strength of Examples 1-3 and Comparative Example 1 were determined, and the results are shown in Table 1. Table 1 The quantitative results of Examples 1-3 are significantly lower than the thickness, indicating that the coating is dense and the base paper fibers are tightly bonded. The comparative example, although having a lower quantitative result, has a higher thickness, indicating a loose structure and a tensile strength of only 74%-80% of that of the examples. The smoothness of Examples 1-3 is significantly improved compared to the comparative example, thanks to the synergistic effect of plasma activation and soft calendering. The abrasion loss of the examples is much lower than that of the comparative example, confirming the reinforcing effect of the nano-calcium carbonate network structure on the coating. The air permeability of the examples is greater than 1200s / 100ml, which is much better than that of the comparative example, demonstrating that the high-filler coating forms a dense barrier layer. The whiteness of Examples 1-3 is higher than that of the comparative example, meeting the high whiteness requirements of Bible paper.

[0036] In summary, this invention achieves a one-step production of ultra-thin, high-strength Bible paper through plasma activation pretreatment, a high-solids nanocoating formulation, and three-stage drying and soft calendering technology. Compared to traditional products, this paper reduces thickness while simultaneously improving smoothness, abrasion resistance, barrier properties, and mechanical strength, meeting the needs of high-end printing and long-term storage.

[0037] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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.

[0038] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A one-step process for producing coated Bible paper, characterized in that: The production process of the Bible paper comprises the following steps: S100, performing gas purging and plasma activation treatment on the base paper to obtain an activated base paper; S200, applying a water-based coating to both sides of the activated base paper to obtain a wet base paper; S300, drying and soft calendering the wet blank to obtain the Bible paper.

2. The production process according to claim 1, characterized in that In step S100, The gas purge uses a nitrogen-oxygen mixed gas containing 20-30 vol% oxygen; The power density of the plasma activation treatment is 6-8W / cm 2 , paper feeding speed is 160-180m / min.

3. The production process according to claim 1, characterized in that In step S100 , the gas used for the plasma activation process is a mixed gas of argon and oxygen, wherein the oxygen accounts for 5-10 vol %.

4. The production process according to claim 1, characterized in that In step S200, the water-based paint has a solid content of 60-65 wt%, and includes the following components: 40-60 parts of surface modified nano-calcium carbonate, 20-30 parts of waterborne polyurethane emulsion, 15-25 parts of carboxylated styrene-butadiene rubber latex, 0.5-1.5 parts of crosslinking aid, 0.3-0.8 parts of nonionic surfactant, 0.5-1 parts of sodium carboxymethyl cellulose, and the balance is water.

5. The production process according to claim 4, characterized in that: The preparation method of the surface-modified nano-calcium carbonate comprises the following steps: S001, adding lime milk into a reactor and introducing CO2 to obtain a nano calcium carbonate suspension; S002, adding a stabilizer to the nano-calcium carbonate suspension, performing a first stirring treatment, and obtaining a nano-calcium carbonate slurry; S003, heating stearic acid until melted, adding an emulsifier, and performing a second stirring process to obtain a modifier; S004, injecting the modifier into the nano-calcium carbonate slurry, performing a third stirring process, a dehydration process, a drying process, and a pulverization process to obtain the surface-modified nano-calcium carbonate.

6. The production process according to claim 5, characterized in that: In step S002, the stabilizer includes at least one of disodium EDTA, NTA, EDTMPS, and sodium alginate; and / or In step S002, the first stirring treatment takes 20-30 minutes; and / or In step S003, the emulsifier includes at least one of sodium dodecylbenzenesulfonate and diglycerol polypropylene glycol ether; and / or In step S003, the second stirring treatment lasts for 10-30 minutes; and / or In step S004, the third stirring treatment is performed for 30-60 minutes at a rotation speed of 150-300 rpm.

7. The production process according to claim 1, characterized in that: In step S200, The single-sided coating amount of the application is 4.5-5.5g / m 2 , the total coating amount is 9-11g / m 2 ; The application temperature was between 28-32°C.

8. The production process according to claim 1, characterized in that: In step S300, the drying process includes infrared pre-drying, hot air drying and UV curing drying; The infrared pre-drying infrared lamp has a wavelength of 800-900nm; The hot air drying temperature is 90-110°C and the wind speed is 3-7m / s; The UV curing and drying ultraviolet band is 250-255nm, and the energy density is 100-120mJ / cm 2 .

9. The production process according to claim 1, characterized in that: In step S300, the temperature of the soft calendering treatment is 80-100°C, and the linear pressure is 60-100 kN / m.

10. A one-step method for coating Bible paper, characterized in that: The Bible paper is prepared by the one-step coating process for Bible paper according to any one of claims 1 to 9.

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