Antistatic and anti-wrinkle treating agent for paper printing and use method of antistatic and anti-wrinkle treating agent

Abstract

The invention relates to an antistatic and anti-wrinkle treating agent for paper printing and a using method thereof, and relates to the technical field of paper printing. The antistatic and anti-wrinkle treating agent for paper printing is prepared from the following raw materials in parts by mass: 5 to 15 parts of polyvinyl alcohol, 10 to 15 parts of silicone oil, 15 to 25 parts of acrylate emulsion, 5 to 10 parts of nano silicon dioxide, 0.5 to 1 part of antioxidant, 0.5 to 1 part of mildew preventive and 40 to 60 parts of deionized water. The application ensures that the paper has multiple properties, thereby having the effect of improving the applicability of the paper.

Description

Technical Field

[0001] The present application relates to the technical field of paper printing, and in particular to an antistatic and anti-wrinkle treatment agent for paper printing and a method for using the same. Background Art

[0002] With the rapid development of the printing industry, the requirements for paper are getting higher and higher. Not only must the printing quality be guaranteed, but it is also required to have good anti-static properties, wrinkle resistance, breakage resistance, etc.

[0003] However, currently available paper processing methods usually use single-function processing agents, which are difficult to meet multiple performance requirements at the same time. Summary of the invention

[0004] In order to ensure that paper has multiple properties and improve the applicability of paper, the present application provides an antistatic and anti-wrinkle treatment agent for paper printing and a method for using the same.

[0005] In the first aspect, the present application provides an antistatic and anti-wrinkle treatment agent for paper printing, which adopts the following technical scheme: an antistatic and anti-wrinkle treatment agent for paper printing, comprising the following raw materials in parts by weight: 5-15 parts of polyvinyl alcohol, 10-15 parts of silicone oil, 15-25 parts of acrylic emulsion, 5-10 parts of nano-silicon dioxide, 0.5-1 part of antioxidant, 0.5-1 part of mildewproof agent, and 40-60 parts of deionized water.

[0006] By adopting the above technical solution, when the treatment agent prepared with polyvinyl alcohol, silicone oil and nano-silicon dioxide as main raw materials is used to treat paper, the antistatic and anti-wrinkle properties of the paper can be improved. The reasons are as follows: Silicone oil can reduce surface resistance, nano-silicon dioxide can increase the hardness and smoothness of paper, and polyvinyl alcohol has excellent film-forming properties. Therefore, paper treated with the above-mentioned treatment agents can form a dense coating on the surface of the paper, which can not only effectively reduce the accumulation of static electricity on the surface of the paper, improve the flatness and wrinkle resistance of the paper, and avoid problems such as blistering and wrinkles during the printing process, but also block the gaps between paper fibers, reduce the air permeability of the paper, and prevent the penetration of liquids such as oil and water, thereby improving the mechanical properties of the paper.

[0007] In addition, the hydroxyl groups contained in the polyvinyl alcohol molecular chain can hydrogen bond with the hydroxyl groups in the paper fibers, thereby further improving the mechanical properties of the paper.

[0008] Therefore, when paper is treated with a treatment agent prepared with polyvinyl alcohol, silicone oil and nano-silicon dioxide as main raw materials, it can be ensured that the paper has multiple properties and the applicability of the paper is improved.

[0009] Preferably, the polyvinyl alcohol is prepared by modification, and the modification preparation method of the polyvinyl alcohol comprises the following steps: Add polyvinyl alcohol into deionized water, heat and stir evenly, then cool to room temperature, then add organic acid, heat and stir evenly, then cool to room temperature to prepare modified polyvinyl alcohol.

[0010] By adopting the above technical scheme, the carboxyl group in the organic acid reacts with the hydroxyl group in the polyvinyl alcohol to form an ester bond, so that a stable structure is formed between the polyvinyl alcohol molecular chains, thereby reducing the hydrophilicity of the polyvinyl alcohol molecules, thereby improving the water resistance of the paper, improving the stability of the paper during the printing process, and effectively improving the mechanical properties of the paper.

[0011] Preferably, the mass ratio of the polyvinyl alcohol to the organic acid is 1:(0.4-0.6).

[0012] By adopting the above technical solution and controlling the mass ratio of polyvinyl alcohol to organic acid within the above range, the hydrophilicity of polyvinyl alcohol molecules can be effectively reduced.

[0013] Preferably, the organic acid is one or both of succinic acid and citric acid.

[0014] Preferably, the nano silicon dioxide is prepared by modification, and the modification preparation method of the nano silicon dioxide comprises the following steps: Add nano-silica to anhydrous ethanol, stir evenly to obtain a silica dispersion, then add Tris solution and deionized water, stir evenly, add dopamine hydrochloride, continue stirring, then add copper sulfate and hydrogen peroxide aqueous solution, after the reaction is completed, centrifuge and wash to obtain modified nano-silica.

[0015] By adopting the above technical solution, dopamine hydrochloride reacts to form polydopamine, and the polydopamine wraps the nano-silicon dioxide, thereby improving the dispersibility of the nano-silicon dioxide, effectively improving the reinforcing effect of the nano-silicon dioxide on the hardness and smoothness of the paper, and then improving the mechanical properties and wrinkle resistance of the paper.

[0016] Preferably, the mass ratio of the nano-silicon dioxide to dopamine hydrochloride is 1:(0.07-0.11).

[0017] By adopting the above technical solution, the mass ratio of nano silicon dioxide to dopamine hydrochloride is controlled within the above range, which can effectively improve the dispersibility of nano silicon dioxide.

[0018] Preferably, 0.4-0.8 parts of KH-550 are also included.

[0019] By adopting the above technical solution, KH-550 is grafted onto the polyvinyl alcohol molecular chain, so that the polyvinyl alcohol contains a large number of highly active silanol groups, which can be chemically cross-linked with the hydroxyl groups of paper fibers to form stable and high-strength covalent bonds, thereby improving the adhesion of the treatment agent on the paper and further improving the mechanical properties of the paper.

[0020] Moreover, the amino group in KH-550 can react with the hydroxyl group in polyvinyl alcohol to form an ester bond, and the silane group in KH-550 can react with the silicon-oxygen bond in silicone oil to form a silicon-oxygen-carbon bond, thereby establishing a cross-link between polyvinyl alcohol and silicone oil, thereby improving the stability of the treating agent and enhancing the adhesion between the treating agent and paper.

[0021] Preferably, the antioxidant is vitamin E.

[0022] Preferably, the mildew inhibitor is benzisothiazolinone.

[0023] In a second aspect, the present application provides a method for using the antistatic and anti-wrinkle treatment agent for paper printing as in the first aspect, which adopts the following technical solution: A method for using an antistatic and anti-wrinkle treatment agent for paper printing, comprising the following steps: S1, adding polyvinyl alcohol to deionized water, stirring evenly, then adding silicone oil, acrylic emulsion and nano-silicon dioxide, continuing to stir, and finally adding antioxidant and mildew inhibitor to prepare a treatment agent; S2. Applying the treatment agent to the paper surface by coating or dipping.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. Silicone oil can reduce surface resistance, nano-silicon dioxide can increase the hardness and smoothness of paper, and polyvinyl alcohol has excellent film-forming properties. Therefore, the paper treated with the above-mentioned treatment agents can form a dense coating on the surface of the paper, which can not only effectively reduce the accumulation of static electricity on the surface of the paper, improve the flatness and wrinkle resistance of the paper, and avoid problems such as bubbling and wrinkles during the printing process, but also block the gaps between paper fibers, reduce the air permeability of the paper, and prevent the penetration of liquids such as grease and water, thereby improving the mechanical properties of the paper.

[0025] 2. The carboxyl group in the organic acid reacts with the hydroxyl group in the polyvinyl alcohol to form an ester bond, so that a stable structure is formed between the polyvinyl alcohol molecular chains, thereby reducing the hydrophilicity of the polyvinyl alcohol molecules, thereby improving the water resistance of the paper, improving the stability of the paper during the printing process, and effectively improving the mechanical properties of the paper. DETAILED DESCRIPTION

[0026] The present application discloses an antistatic and anti-wrinkle treatment agent for paper printing and a method of using the same. The present application is further described in detail in conjunction with the embodiments and comparative examples. The raw materials involved in the present application can all be obtained commercially, wherein polyvinyl alcohol is purchased from Shanxi Sanwei Shengtai New Material Technology Co., Ltd., and acrylate emulsion is purchased from Qingxin County Hongtu Auxiliary Agent Co., Ltd.

[0027] Example 1 The antistatic and anti-wrinkle treating agent for paper printing comprises the following raw materials by weight: 5g of polyvinyl alcohol, 10g of silicone oil, 15g of acrylic emulsion, 5g of nano silicon dioxide, 0.5g of antioxidant, 0.5g of mildewproof agent and 40g of deionized water.

[0028] The antioxidant is vitamin E and the mildew preventer is benzisothiazolinone.

[0029] Method for using antistatic and anti-wrinkle treatment agent for paper printing S1. Add polyvinyl alcohol to deionized water, heat to 60°C until completely dissolved, then add silicone oil, acrylic emulsion and nano-silicon dioxide, continue stirring for 30 minutes, finally add antioxidant and mildew inhibitor, continue stirring for 10 minutes, and prepare a treatment agent; S2. Apply the treatment agent evenly on the surface of the paper and use it after it dries.

[0030] Example 2 The antistatic and anti-wrinkle treating agent for paper printing comprises the following raw materials by weight: 15g of polyvinyl alcohol, 15g of silicone oil, 25g of acrylic emulsion, 10g of nano silicon dioxide, 1g of antioxidant, 1g of mildewproof agent and 60g of deionized water.

[0031] The antioxidant is vitamin E and the mildew preventer is benzisothiazolinone.

[0032] Method for using antistatic and anti-wrinkle treatment agent for paper printing S1. Add polyvinyl alcohol to deionized water, heat to 60°C until completely dissolved, then add silicone oil, acrylic emulsion and nano-silicon dioxide, continue stirring for 30 minutes, finally add antioxidant and mildew inhibitor, continue stirring for 10 minutes, and prepare a treatment agent; S2. Apply the treatment agent evenly on the surface of the paper and use it after it dries.

[0033] Example 3 The antistatic and anti-wrinkle treating agent for paper printing comprises the following raw materials by weight: 10g of polyvinyl alcohol, 13g of silicone oil, 20g of acrylic emulsion, 8g of nano silicon dioxide, 0.8g of antioxidant, 0.8g of mildewproof agent and 50g of deionized water.

[0034] The antioxidant is vitamin E and the mildew preventer is benzisothiazolinone.

[0035] Method for using antistatic and anti-wrinkle treatment agent for paper printing S1. Add polyvinyl alcohol to deionized water, heat to 60°C until completely dissolved, then add silicone oil, acrylic emulsion and nano-silicon dioxide, continue stirring for 30 minutes, finally add antioxidant and mildew inhibitor, continue stirring for 10 minutes, and prepare a treatment agent; S2. Soak the paper in the treatment agent for 1 minute, take out the paper, squeeze out the excess treatment agent, put it in a 70℃ oven, dry it for 1 hour and it can be used.

[0036] Example 4 The difference between Example 4 and Example 3 is that the polyvinyl alcohol is prepared by modification, and the modification preparation method of the polyvinyl alcohol comprises the following steps: Add 10g of polyvinyl alcohol to 100g of deionized water, heat to 95°C with continuous stirring and keep warm for 1h, cool to 25°C, add 0.4g of organic acid, stir and heat to 80°C, react for 2h, and cool to 25°C to obtain modified polyvinyl alcohol.

[0037] The organic acid is a mixture of succinic acid and citric acid, and the mass ratio of succinic acid to citric acid is 1:0.8.

[0038] Example 5 The difference between Example 5 and Example 3 is that the polyvinyl alcohol is prepared by modification, and the modification preparation method of the polyvinyl alcohol comprises the following steps: Add 10g of polyvinyl alcohol to 100g of deionized water, heat to 95°C with continuous stirring and keep warm for 1h, cool to 25°C, add 0.6g of organic acid, stir and heat to 80°C, react for 2h, and cool to 25°C to obtain modified polyvinyl alcohol.

[0039] The organic acid is a mixture of succinic acid and citric acid, and the mass ratio of succinic acid to citric acid is 1:0.8.

[0040] Example 6 The difference between Example 6 and Example 3 is that the polyvinyl alcohol is prepared by modification, and the modification preparation method of the polyvinyl alcohol comprises the following steps: Add 10g of polyvinyl alcohol to 100g of deionized water, heat to 95°C with continuous stirring and keep warm for 1h, cool to 25°C, add 0.5g of organic acid, stir and heat to 80°C, react for 2h, and cool to 25°C to obtain modified polyvinyl alcohol.

[0041] The organic acid is succinic acid.

[0042] Example 7 The difference between Example 7 and Example 6 is that the mass ratio of polyvinyl alcohol to organic acid is 1:0.2.

[0043] Example 8 The difference between Example 8 and Example 6 is that the mass ratio of polyvinyl alcohol to organic acid is 1:0.8.

[0044] Example 9 The difference between Example 9 and Example 6 is that the nano silicon dioxide is prepared by modification, and the modification preparation method of the nano silicon dioxide comprises the following steps: 1 g of nano-silica was added to 10 g of anhydrous ethanol, stirred evenly to obtain a silica dispersion, and then 25 g of Tris solution (the pH value of the Tris solution was 8.0) and 20 g of deionized water were added, and after ultrasonic treatment for 5 minutes, 0.07 g of dopamine hydrochloride was added, and the mixture was stirred at a uniform speed for 5 minutes. Then, 0.03 g of copper sulfate and 0.01 g of aqueous hydrogen peroxide solution (the mass concentration of the aqueous hydrogen peroxide solution was 30%) were added, and the reaction was continued for 40 minutes. The mixture was centrifuged, and then ultrasonically washed with deionized water and anhydrous ethanol for 3 times to obtain modified nano-silica.

[0045] Example 10 The difference between Example 10 and Example 6 is that the nano silicon dioxide is prepared by modification, and the modification preparation method of the nano silicon dioxide comprises the following steps: 1 g of nano-silica was added to 10 g of anhydrous ethanol, stirred evenly to obtain a silica dispersion, and then 25 g of Tris solution (the pH value of the Tris solution was 8.0) and 20 g of deionized water were added, and after ultrasonic treatment for 5 minutes, 0.11 g of dopamine hydrochloride was added, and the mixture was stirred at a uniform speed for 5 minutes. Then, 0.03 g of copper sulfate and 0.01 g of aqueous hydrogen peroxide solution (the mass concentration of the aqueous hydrogen peroxide solution was 30%) were added, and the reaction was continued for 40 minutes. The mixture was centrifuged, and then ultrasonically washed with deionized water and anhydrous ethanol for 3 times to obtain modified nano-silica.

[0046] Embodiment 11 The difference between Example 11 and Example 6 is that the nano silicon dioxide is prepared by modification, and the modification preparation method of the nano silicon dioxide comprises the following steps: 1 g of nano-silica was added to 10 g of anhydrous ethanol, stirred evenly to obtain a silica dispersion, and then 25 g of Tris solution (the pH value of the Tris solution was 8.0) and 20 g of deionized water were added, and after ultrasonic treatment for 5 minutes, 0.09 g of dopamine hydrochloride was added, and the mixture was stirred at a uniform speed for 5 minutes, and then 0.03 g of copper sulfate and 0.01 g of aqueous hydrogen peroxide solution (the mass concentration of the aqueous hydrogen peroxide solution was 30%) were added, and the reaction was continued for 40 minutes, centrifuged, and ultrasonically washed 3 times with deionized water and anhydrous ethanol to obtain modified nano-silica.

[0047] Example 12 The difference between Example 12 and Example 11 is that the mass ratio of nano-silicon dioxide to dopamine hydrochloride is 1:0.03.

[0048] Example 13 The difference between Example 13 and Example 11 is that the mass ratio of nano-silicon dioxide to dopamine hydrochloride is 1:0.15.

[0049] Embodiment 14 The difference between Example 14 and Example 11 is that the treating agent further includes 0.4 g of KH-550.

[0050] That is, the paper printing antistatic and anti-wrinkle treatment agent includes the following raw materials by weight: 10g of polyvinyl alcohol, 13g of silicone oil, 20g of acrylic emulsion, 8g of nano silicon dioxide, 0.8g of antioxidant, 0.8g of mildewproof agent, 0.4g of KH-550, and 50g of deionized water.

[0051] The antioxidant is vitamin E and the mildew preventer is benzisothiazolinone.

[0052] Method for using antistatic and anti-wrinkle treatment agent for paper printing S1. Add polyvinyl alcohol to deionized water, heat to 60°C until completely dissolved, then add silicone oil, acrylic emulsion, nano-silicon dioxide and KH-550, continue stirring for 30 minutes, finally add antioxidant and mildew inhibitor, continue stirring for 10 minutes to prepare a treatment agent; S2. Soak the paper in the treatment agent for 1 minute, take out the paper, squeeze out the excess treatment agent, put it in a 70℃ oven, dry it for 1 hour and it can be used.

[0053] Embodiment 15 The difference between Example 15 and Example 14 is that the treating agent further includes 0.8 g of KH-550.

[0054] Example 16 The difference between Example 16 and Example 14 is that the treating agent further includes 0.6 g of KH-550.

[0055] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the treatment agent does not contain nano silicon dioxide.

[0056] The papers prepared in Examples 1-16 and Comparative Example 1 were cut into paper sheets of 20*80 mm in size, and the thickness of the paper sheets was 0.2 mm, and the following performance tests were performed.

[0057] (1) Tensile strength The paper sheets were tested according to GB / T12914-2008 Determination of tensile strength of paper and paperboard. The greater the tensile strength, the better the mechanical properties of the paper.

[0058] (2) Folding resistance The paper pieces were tested according to "GB / T457-2002 Determination of Folding Endurance of Paper", where the greater the folding endurance, the better the wrinkle resistance of the paper.

[0059] Table 1 sample Tensile Strength Folding resistance Example 1 1.72 70 Example 2 1.74 70 Example 3 1.77 80 Example 4 2.81 220 Example 5 2.82 220 Example 6 2.84 230 Example 7 2.78 210 Example 8 2.77 210 Example 9 3.55 310 Example 10 3.54 310 Embodiment 11 3.59 320 Example 12 3.50 300 Example 13 3.49 300 Embodiment 14 3.94 390 Embodiment 15 3.93 390 Example 16 3.96 400 Comparative Example 1 1.34 20 Data analysis Specifically combining the test results of Example 6 and Example 3, the tensile strength and folding endurance of Example 6 are better than those of Example 3. The analysis is as follows: the difference between Example 6 and Example 3 is that polyvinyl alcohol is modified by organic acid, which reduces the hydrophilicity of the polyvinyl alcohol molecules, improves the stability of the paper during printing, and effectively improves the mechanical properties and wrinkle resistance of the paper.

[0060] Specifically combining the test results of Example 11 and Example 6, the tensile strength and folding endurance of Example 11 are better than those of Example 6. The analysis is as follows: the difference between Example 11 and Example 6 is that the nano-silicon dioxide is modified by polydopamine formed by dopamine hydrochloride, which effectively improves the dispersibility of the nano-silicon dioxide, thereby improving the reinforcing effect of the nano-silicon dioxide on the hardness and smoothness of the paper, thereby improving the mechanical properties and wrinkle resistance of the paper.

[0061] Specifically combining the test results of Example 16 and Example 11, the tensile strength and folding endurance of Example 16 are better than those of Example 11. The analysis is as follows: the difference between Example 16 and Example 11 is that the treatment agent also includes KH-550, and KH-550 can promote the cross-linking reaction between polyvinyl alcohol and paper fibers and silicone oil, thereby improving the adhesion of the treatment agent on the paper, and further improving the mechanical properties and wrinkle resistance of the paper.

[0062] Specifically combining the test results of Example 1 and Comparative Example 1, the tensile strength and folding endurance of Example 1 are better than those of Comparative Example 1. The analysis is as follows: the difference between Example 1 and Comparative Example 1 is that the treatment agent contains nano-silicon dioxide, which can increase the hardness and smoothness of the paper, thereby improving the mechanical properties and wrinkle resistance of the paper.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An antistatic and anti-wrinkle treatment agent for paper printing, characterized in that: The invention comprises the following raw materials in parts by weight: 5-15 parts of polyvinyl alcohol, 10-15 parts of silicone oil, 15-25 parts of acrylic emulsion, 5-10 parts of nano silicon dioxide, 0.5-1 parts of antioxidant, 0.5-1 parts of mildewproof agent and 40-60 parts of deionized water.

2. The antistatic and anti-wrinkle treating agent for paper printing according to claim 1, characterized in that: The polyvinyl alcohol is prepared by modification, and the modification preparation method of the polyvinyl alcohol comprises the following steps: Add polyvinyl alcohol into deionized water, heat and stir evenly, then cool to room temperature, then add organic acid, heat and stir evenly, then cool to room temperature to prepare modified polyvinyl alcohol.

3. The antistatic and anti-wrinkle treating agent for paper printing according to claim 2, characterized in that: The mass ratio of the polyvinyl alcohol to the organic acid is 1:(0.4-0.6).

4. The antistatic and anti-wrinkle treating agent for paper printing according to claim 2, characterized in that: The organic acid is one or both of succinic acid and citric acid.

5. The antistatic and anti-wrinkle treating agent for paper printing according to claim 1, characterized in that: The nano silicon dioxide is prepared by modification, and the modification preparation method of the nano silicon dioxide comprises the following steps: Add nano-silica to anhydrous ethanol, stir evenly to obtain a silica dispersion, then add Tris solution and deionized water, stir evenly, add dopamine hydrochloride, continue stirring, then add copper sulfate and hydrogen peroxide aqueous solution, after the reaction is completed, centrifuge and wash to obtain modified nano-silica.

6. The antistatic and anti-wrinkle treating agent for paper printing according to claim 5, characterized in that: The mass ratio of the nano silicon dioxide to dopamine hydrochloride is 1:(0.07-0.11).

7. The antistatic and anti-wrinkle treating agent for paper printing according to claim 1, characterized in that: Also included is 0.4-0.8 parts of KH-550.

8. The antistatic and anti-wrinkle treating agent for paper printing according to claim 1, characterized in that: The antioxidant is vitamin E.

9. The antistatic and anti-wrinkle treating agent for paper printing according to claim 1, characterized in that: The mildew preventer is benzisothiazolinone.

10. A method for using the antistatic and anti-wrinkle treatment agent for paper printing as claimed in claim 1, characterized in that: The steps include: S1, adding polyvinyl alcohol to deionized water, stirring evenly, then adding silicone oil, acrylic emulsion and nano-silicon dioxide, continuing to stir, and finally adding antioxidant and mildew inhibitor to prepare a treatment agent; S2. Applying the treatment agent to the paper surface by coating or dipping.