Preparation device and preparation method of paper printing ink quick-drying coating

Abstract

The invention discloses a preparation device and method of a paper ink quick-drying coating, and aims to improve the drying speed and printing quality of ink. The device comprises a stirring kettle, a filter and a coating device, the stirring kettle is used for mixing coating raw materials, the filter removes particles which are not completely dispersed, the coating device evenly coats a base material with the coating, and rapid curing is achieved through hot air and ultraviolet drying. The coating adopts a high-solid-content hydrated large-specific-surface-area porous layered compound pigment, and has the characteristics of quick drying, environment friendliness, reusability and the like. The invention is suitable for offset printing, water-based ink, ink jet, flexible printing and thermal sublimation printing, and has the advantages of high efficiency and environmental protection.

Description

Technical Field

[0001] The invention relates to the technical field of printing, and in particular to a preparation device and a preparation method for quick-drying paper ink coating. Background Art

[0002] In traditional printing technology, the drying speed and quality of ink have always been one of the key factors affecting the printing effect. Existing quick-drying ink coatings often have problems such as slow drying speed, poor adhesion, and low resolution of printed images when used in offset printing, water-based inks, inkjet and flexible printing. These defects lead to frequent occurrence of phenomena such as print-through, blurring, and paper smearing and sticking during the printing process, which seriously affects the quality and efficiency of printed products.

[0003] Especially in high-precision printing applications such as digital printing and thermal sublimation printing, fast drying and stable curing of inks are particularly important. However, in the existing technology, the drying of inks usually relies on natural evaporation or heating drying, which is not only time-consuming, but also consumes a lot of energy, and cannot effectively meet the requirements of modern printing industry for high efficiency, environmental protection and energy saving.

[0004] In addition, the pigments used in traditional ink drying coatings are mostly ordinary calcium carbonate, silicon dioxide, etc. These pigments have low specific surface area and porosity, and are difficult to effectively absorb the solvent in the ink, resulting in prolonged drying time and poor image quality after drying. Therefore, how to provide a coating with high specific surface area, porosity and excellent drying performance has become an urgent problem to be solved in the technical field.

[0005] The present invention aims to solve the above technical problems and provide a preparation device and method for quick-drying paper ink coating. The high-solid content hydrated large specific surface area porous layered compound used as pigment can significantly improve the drying speed and printing quality of ink, reduce energy consumption, and meet the requirements of modern printing industry for environmental protection and high efficiency. Summary of the invention

[0006] The present invention relates to a preparation device and a preparation method for a quick-drying coating for paper ink, aiming to solve the problems of slow ink drying speed and poor printing quality in the existing printing process. By using the high-solid content hydrated large specific surface area porous layered compound provided by the present invention as the main pigment, the drying speed of the ink can be significantly improved, thereby reducing printing defects such as print-through, blurring, and hollowing, and improving the printing quality.

[0007] The preparation device of the present invention comprises a stirring kettle, a filter and a coating device. The stirring kettle is used to fully mix the coating raw materials, and the temperature of the mixture is accurately controlled by a heating and cooling system to ensure that the pigment and the binder are fully dispersed. The filter is used to remove incompletely dispersed particles and impurities to ensure the fineness of the coating. The coating device is used to evenly coat the coating on the surface of the substrate, and dry it by combining hot air drying and ultraviolet drying to achieve rapid curing of the coating.

[0008] The preparation method of the present invention comprises the steps of raw material preparation, mixing process, filtering and blending, coating and drying. First, the pigment, binder and additive are put into a stirred tank in proportion for mixing, and heated and cooled at a specific temperature to obtain a uniform mixture. Then, the mixture is filtered through a filter to remove impurities, and the solid content of the coating is blended to a suitable range. Finally, the coating is evenly coated on the surface of the substrate through a coating device, and dried through a drying system to ensure rapid curing and excellent adhesion of the coating.

[0009] The prepared quick-drying paper ink coating has the following advantages:

[0010] Fast drying: Through the high specific surface area and the exchangeability of interlayer anions, the ink can be dried and solidified quickly, effectively improving the printing efficiency.

[0011] High-quality printing: reduces the phenomena of show-through, blurring and blurring, and improves the resolution and color vividness of printed images.

[0012] Environmental protection: The use of water-based solvents reduces the use of organic solvents and reduces pollution to the environment.

[0013] Recycling: Pigments have a memory effect and can be recycled through high-temperature treatment, reducing the cost of use.

[0014] The present invention provides a device and method for preparing a quick-drying coating for paper ink which is efficient, environmentally friendly and applicable to a variety of printing processes, and is particularly applicable to the fields of offset printing, water-based ink, inkjet, flexible printing and thermal sublimation printing, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a schematic diagram of the structure of a device according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the pigment action mechanism of an embodiment of the present invention;

[0018] Figure 3 Schematic diagram of interlayer exchange of pigments in an embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the microscopic morphology of the pigment according to the embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0021] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0022] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0023] The present invention relates to a preparation device and a preparation method of a quick-drying coating for paper ink, and in particular to a quick-drying coating for offset printing, water-based ink, inkjet, flexible printing and thermal sublimation printing. The coating uses a novel high-solid content hydrated large specific surface area porous layered compound as a main pigment, thereby achieving quick drying of the ink and excellent printing effect.

[0024] See also Figures 1 to 4

[0025] 1. Composition of the preparation device

[0026] Stirring tank:

[0027] Main body: The stirring kettle is made of stainless steel, which has excellent corrosion resistance and mechanical stability. It is used to mix various pigments, binders and additives to make the prepared coating uniform.

[0028] Mixing system: Equipped with a double-blade agitator with adjustable speed, suitable for mixing materials of different viscosities.

[0029] Heating system: The stirred tank is equipped with a jacket heating system, which can control the heating temperature between 30℃ and 100℃ to ensure that the materials are mixed at the appropriate temperature.

[0030] Cooling system: The stirred tank is also equipped with a cooling system to ensure that the prepared paint is cooled at a suitable temperature to avoid pigment deterioration.

[0031] Filters:

[0032] Structure: The filter uses a stainless steel mesh with a pore size of 80-150 mesh, which can effectively remove large particles of impurities and ensure the fineness of the paint.

[0033] Function: Used to filter out impurities that may be generated during the mixing process to ensure that the prepared coating has good uniformity and fineness.

[0034] Coating device:

[0035] Coating roller system: adopts roller coating device, and achieves uniform coating thickness by adjusting the roller spacing and pressure. The coating amount can be adjusted between 1-100g / m 2 To meet different printing needs.

[0036] Drying system: Equipped with hot air drying and ultraviolet drying systems to achieve rapid drying after coating and improve production efficiency.

[0037] Solvent recovery device:

[0038] Recovery system: The solvent recovery device is used to recover the organic solvent volatilized during the coating process to avoid environmental pollution and improve resource utilization.

[0039] 2. Preparation method

[0040] Raw materials preparation:

[0041] Main pigments: High solid content, hydrated, large specific surface area porous layered compounds are used as pigments, with the chemical formula M2+1-XM3+(OH-)2x / n·mH2O, where M2+ is a divalent metal ion (such as Mg2+, Fe2+, Zn2+, etc.), M3+ is a trivalent metal ion (such as Al3+, Fe3+, etc.), and An- is an interlayer anion (such as Cl-, NO3-, etc.).

[0042] Auxiliary materials: including binder, dispersant, defoamer, lubricant, water retaining agent, etc. Among them, the binder is oxidized starch or styrene-butadiene latex to improve the adhesion of the coating.

[0043] Mixing process:

[0044] Preliminary mixing: Add pigment, binder and additive into the stirring kettle according to the proportion, start the stirring system for preliminary mixing, control the speed at 200-300rpm, and the time is 30 minutes.

[0045] Heating and mixing: Start the heating system, control the temperature at 60℃, and continue stirring for 60 minutes to promote the dispersion of pigments and the uniformity of coating.

[0046] Cooling and conditioning: After stopping heating, start the cooling system, cool the mixture to 30°C, add water retaining agent and lubricant, and stir for 15 minutes to improve the rheological properties of the coating.

[0047] Filtration and blending:

[0048] Filtration: Filter the mixed paint through a stainless steel filter to remove incompletely dispersed particles and impurities.

[0049] Adjust the solid content: Test the solid content of the coating. If the solid content is insufficient, add an appropriate amount of pigment slurry; if the solid content is too high, add an appropriate amount of solvent (water or ethylene glycol) to dilute it, and finally control the solid content between 30% and 50%.

[0050] Coating and drying:

[0051] Coating: Use a roller coating device to evenly coat the coating on the surface of paper or other substrates. The coating amount can be adjusted between 1-50g / m 2 , to meet different printing requirements.

[0052] Drying: The coated paper is dried by a combination of hot air drying and ultraviolet drying. The drying temperature is controlled at 100℃ to 150℃ to ensure rapid curing of the coating and avoid penetration and diffusion of ink on the paper.

[0053] Product testing:

[0054] Drying speed test: The coated substrate needs to pass the drying speed test to ensure that the ink is completely dry within the specified time, generally requiring surface drying within 30 seconds.

[0055] Adhesion test: Conduct adhesion test on the dried coating layer to ensure that it adheres firmly to the paper surface without powdering or hair loss.

[0056] Gloss test: Test the glossiness of the coating layer to ensure that the printed image has a high visual effect.

[0057] Finished product packaging and storage:

[0058] Packaging: Qualified quick-drying paints are sealed and packaged using anti-static and moisture-proof packaging materials to ensure the storage stability of the paint.

[0059] Storage: The storage environment should be cool and dry, with a temperature between 5℃ and 35℃, avoid direct sunlight, and the storage period is 12 months.

[0060] 3. Usage

[0061] Substrate selection: The coating can be applied to a variety of substrates such as cultural paper, coated paper, art paper, film, etc. Users can choose the appropriate substrate for printing according to specific needs.

[0062] Coating process: Apply the coating to the substrate surface by roller coating, immersion coating or spraying to ensure uniform coating without missing or over-coating.

[0063] Note:

[0064] The coating thickness should be controlled during the coating process to avoid uneven drying due to excessive coating.

[0065] After coating, it should be dried as quickly as possible to prevent the paint from dripping or spreading.

[0066] 4. Technical Effect

[0067] The present invention realizes rapid drying and curing of ink through the coating preparation device and method, and has the following advantages:

[0068] Fast drying: The high specific surface area of ​​the pigment and the exchangeability of interlayer anions enable the ink to dry and solidify in a short time.

[0069] Improved printing quality: Reduced see-through, blurring, and blurring, and improved the resolution and color vividness of printed images.

[0070] Environmental protection: The use of water-based solvents reduces the use of organic solvents and reduces pollution to the environment.

[0071] Recycling: Pigments have a memory effect and can be recycled through high-temperature treatment, reducing the cost of use.

[0072] In summary, the present invention provides a highly efficient, environmentally friendly device and method for preparing quick-drying coating for paper ink suitable for a variety of printing processes, which solves the problems of slow ink drying speed and poor printing quality in the prior art and has high application value.

[0073] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A preparation device for quick-drying paper ink coating, comprising: A stirring kettle, which is used to mix various raw materials of the coating, and the stirring kettle comprises a stirring system, a heating system and a cooling system. The stirring system is a double-blade stirrer, the heating system is used to heat the mixture to 30-100°C, and the cooling system is used to cool the mixture to 30°C; A filter connected to the stirring tank is used to filter the mixture to remove incompletely dispersed particles and impurities, and the filter pore size is 80-150 mesh; The coating device comprises a coating roller system and a drying system. The coating roller system is used to evenly coat the coating on the surface of the substrate. The coating amount is 1-100 g / m 2 The drying system includes hot air drying and ultraviolet drying, which are used to dry the coated substrate.

2. The preparation device according to claim 1, wherein the stirring tank is made of stainless steel material and has corrosion resistance and mechanical stability.

3. The preparation device according to claim 1, wherein the drying temperature of the coating device is controlled between 100°C and 150°C to ensure rapid curing of the coating.

4. A method for preparing a quick-drying coating for paper ink, characterized in that: The following steps are involved: Raw material preparation: A high solid content hydrated large specific surface area porous layered compound is used as the pigment. The chemical formula of the pigment is M2+1-XM3+(OH-)2x / n·mH2O, where M2+ is a divalent metal ion, M3+ is a trivalent metal ion, and An- is an interlayer anion; Mixing process: put the pigment, binder and additive into the stirring kettle for preliminary mixing, the mixing temperature is controlled at 60℃, the stirring time is 60 minutes, then cool to 30℃, add the water retaining agent and lubricant and continue stirring for 15 minutes; Filtration and blending: Filter the mixed paint through a filter and blend the solid content to between 30% and 50%; Coating and drying: The coating is evenly applied on the surface of the substrate by a coating device, and dried by hot air drying and ultraviolet drying at a drying temperature of 100°C to 150°C. 5 . The preparation method according to claim 4 , wherein the pigment is a hydrated large specific surface area porous layered compound having a high specific surface area and porosity, and the molar ratio x of the compound is between 0.2 and 0.

33.

6. The preparation method according to claim 4, wherein the substrate comprises any one of cultural paper, coated paper, art paper, film, wood board, plastic, metal sheet, cloth, and rubber.

7. The preparation method according to claim 4, wherein the coating method is selected from any one of roller coating, immersion coating, spraying, blade coating, and steam knife coating.

8. A coating for quick-drying ink for paper, characterized in that: The coating comprises a high-solid-content hydrated large-specific-surface-area porous layered compound as a pigment, the chemical formula of the pigment being M2+1-XM3+(OH-)2x / n·mH2O, the pigment having the characteristics of high specific surface area, porosity, memory effect and reusability, and being suitable for offset printing, water-based ink, inkjet, flexible printing and thermal sublimation printing.

9. The coating according to claim 8, wherein the interlayer anion of the pigment can be any one of Cl-, NO3-, OH-, and SO42-, and the pigment has interlayer anion exchangeability and metal ion complexing properties, thereby achieving rapid curing of the ink.

Images