Antistatic corrugated carton and method for manufacturing the same

Abstract

The application discloses an antistatic corrugated carton and a preparation method thereof, and relates to the technical field of packaging materials.The application discloses a preparation method of an antistatic corrugated carton, which comprises the following steps: coating antistatic paint on the surface of the corrugated carton, and hot-pressing and drying to obtain the antistatic corrugated carton; the antistatic paint comprises the following raw materials in percentage by weight: 60-80% of conductive filler crosslinked matrix resin, 0.2-0.4% of auxiliary film-forming material, 0.5-1% of functional additives, and the balance of solvent; the sum of the percentage by weight of the raw materials is 100%; the graphene oxide is modified organically, and the modified graphene oxide is crosslinked with water-soluble acrylic resin by chemical modification to serve as the base material of the paint; the paint prepared by the application not only has the antistatic effect, but also has the characteristics of good wear resistance and moisture resistance.

Description

Technical Field

[0001] This invention relates to the field of packaging materials technology, specifically to an antistatic corrugated cardboard box and its preparation method. Background Technology

[0002] With the rapid development of the electronics industry, electronic instruments and equipment are becoming increasingly miniaturized, multifunctional, and intelligent. Semiconductors, large-scale and very large-scale integrated circuits, and high-density integrated circuits have become widely used devices in the electronics industry. The high degree of product integration leads to increasingly higher electromagnetic induction sensitivity, making them highly susceptible to electromagnetic and electrostatic interference. For example, electron tubes, integrated circuit boards, and electronic connectors are highly vulnerable to electrostatic voltage generated during production, transportation, storage, and use due to friction, impact, contact, and separation. This electrostatic voltage can significantly affect product technical parameters, reduce stability, and even cause product failure. Therefore, electrostatic protective packaging is of paramount importance.

[0003] Static electricity protective packaging uses packaging materials that do not generate triboelectric charges to reduce or eliminate the triboelectric charges generated during handling and use, preventing damage to static-sensitive products from electrostatic discharge, thus achieving the purpose of packaging protection. Currently, most anti-static corrugated boxes on the market are made by printing a functional coating on the surface of the box using a printing press. However, the adhesion between the coating and the box surface is poor, the printing layer is uneven, and the thickness is difficult to control. Moreover, the main conductive component of these coatings is carbon particles, which easily detach from the box surface after printing, affecting not only the conductivity of the coating but also polluting the environment. Summary of the Invention

[0004] The purpose of this invention is to provide an antistatic corrugated cardboard box and its preparation method, thereby solving the following technical problems:

[0005] In the prior art, conductive carbon particles are added to the coating to apply an antistatic effect to the surface of corrugated cardboard boxes. However, the carbon particles in the coating are very easy to fall off the surface of the cardboard box, which not only affects the conductivity of the coating, but also pollutes the environment.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A method for preparing an antistatic corrugated cardboard box includes the following steps: coating the surface of the corrugated cardboard box with an antistatic coating, hot-pressing and drying to obtain the antistatic corrugated cardboard box;

[0008] The antistatic coating comprises the following raw materials by weight percentage: 60-80% conductive filler crosslinked matrix resin, 0.2-0.4% auxiliary film-forming agent, 0.5-1% functional additives, and the balance being solvent, with the sum of the weight percentages of the raw materials being 100%.

[0009] The preparation method of the conductive filler crosslinked matrix resin includes the following steps:

[0010] S1: Add some deionized water, some ammonium persulfate, and water-soluble acrylic resin to a reactor, control the temperature at 70-80℃, and react until blue light appears. Add methyl methacrylate, butyl acrylate, methacrylic acid, the remaining deionized water, and the remaining ammonium persulfate. Keep the reaction at this temperature for 2-4 hours. Add γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 1-2 hours. Filter to obtain water-soluble organosilicon-modified acrylic resin.

[0011] S2: Add epoxy-based hyperbranched polysiloxane, modified graphene oxide, and anhydrous ethanol to a reaction vessel and disperse them evenly. Control the temperature at 70-80℃ and keep it at this temperature for 24-30 hours under stirring. Filter, wash, and dry to obtain the modified conductive filler.

[0012] S3: In an argon atmosphere, water-soluble organosilicon-modified acrylic resin and modified conductive filler are added to a reactor and mixed evenly. The temperature is controlled at 65-75℃, and the reaction is carried out under stirring conditions for 1-2 hours to obtain conductive filler crosslinked matrix resin.

[0013] As a further aspect of the present invention: the mass ratio of ammonium persulfate added twice in S1 is 3-4.2:1; the mass ratio of deionized water added twice in S1 is 3.5-5.5:1; the addition ratio of deionized water, ammonium persulfate, water-soluble acrylic resin, methyl methacrylate, butyl acrylate, methacrylic acid, and γ-methacryloyloxypropyltrimethoxysilane in S1 is 40-50mL:0.6-1g:10-20g:8-10g:10g:2.5-3.5g:1-2g.

[0014] As a further embodiment of the present invention: the addition ratio of epoxy hyperbranched polysiloxane, modified graphene oxide and anhydrous ethanol in S2 is 3-6g:10g:50-100mL.

[0015] As a further aspect of the present invention: the mass ratio of water-soluble organosilicon-modified acrylic resin and modified conductive filler in S3 is 50-70:5-10.

[0016] As a further embodiment of the present invention, the preparation method of epoxy hyperbranched polysiloxane includes the following steps: adding γ-glycidyl etheroxypropyltrimethoxysilane and deionized water into a reaction vessel and dispersing them evenly, controlling the temperature at 45-55℃, keeping the reaction at this temperature for 0.5-1h, adjusting the pH to 5-6, keeping the reaction at this temperature for 3-6h, adjusting the pH to neutral, and drying to obtain epoxy hyperbranched polysiloxane.

[0017] As a further aspect of the present invention: the addition ratio of γ-glycidyl etheroxypropyltrimethoxysilane and deionized water is 10g:10-20mL.

[0018] As a further aspect of the present invention, the preparation method of modified graphene oxide includes the following steps:

[0019] A1: Graphene oxide, N,N-dimethylformamide, ethylenediamine, and dicycloethylcarboimide were added to a reaction flask and dispersed evenly. The temperature was controlled at 100-110℃ and kept at this temperature for 12-24 hours under stirring. After centrifugation, the solid was dispersed in methanol by ultrasonic dispersion, washed, and dried to obtain amination-modified graphene oxide.

[0020] A2: Amination-modified graphene oxide and deionized water are added to a reaction vessel and dispersed evenly. Aniline and hydrochloric acid solution component one are mixed and added to the reaction vessel and dispersed evenly. Ammonium persulfate and hydrochloric acid solution component two are mixed and added to the reaction vessel. The temperature is controlled at 0-5℃, and the reaction is carried out under stirring for 12-15 hours. The mixture is washed with water until neutral and dried to obtain modified graphene oxide.

[0021] As a further embodiment of the present invention: the addition ratio of graphene oxide, N,N-dimethylformamide, ethylenediamine and dicycloethylcarboimide in A1 is 10g:100-200mL:10-25g:2-4g.

[0022] As a further aspect of the present invention: in A2, hydrochloric acid solution component one is a 2 mol / L hydrochloric acid aqueous solution, and hydrochloric acid solution component two is a 1 mol / L hydrochloric acid aqueous solution; the addition ratio of amino-modified graphene oxide, deionized water, aniline, hydrochloric acid solution component one, ammonium persulfate, and hydrochloric acid solution component two is 10g: 100-200mL: 10-12g: 100-150mL: 15-20g: 10-20mL.

[0023] As a further aspect of the present invention: the auxiliary film-forming agent is carboxymethyl cellulose; the solvent is a mixture of water and ethanol in a mass ratio of 3:1-2.

[0024] As a further aspect of the present invention: the functional additives include defoamers, dispersants, and thickeners; the defoamer accounts for 0.1-0.2% of the total mass of the antistatic coating; the dispersant accounts for 0.2-0.5% of the total mass of the antistatic coating; and the thickener accounts for 0.1-0.3% of the total mass of the antistatic coating.

[0025] As a further aspect of the present invention: the defoamer is a siloxane defoamer; the dispersant is a sodium acrylate aqueous dispersant.

[0026] As a further aspect of the present invention, the specific steps of hot-press drying are as follows: adjusting the pressure to 10-25 kg / cm². 2Drying is carried out at a controlled temperature of 160-170℃.

[0027] As a further aspect of the present invention: the coating amount of the antistatic ink is 5-15 g / m². 2 .

[0028] An antistatic corrugated cardboard box is made by any of the above preparation methods.

[0029] The beneficial effects of this invention are:

[0030] This application first utilizes a condensation method, modifying graphene oxide prepared via the Hummers method with ethylenediamine to obtain amino-modified graphene oxide; then, it polymerizes the amino groups of the amino-modified graphene oxide with aniline to obtain modified graphene oxide. Next, this application uses the silane coupling agent γ-glycidoxypropyltrimethoxysilane to prepare epoxy-modified hyperbranched polysiloxane. Then, this application uses methyl methacrylate, butyl acrylate, and methacrylic acid as main monomers, adding γ-methacryloyloxypropyltrimethoxysilane as a functional monomer, and prepares a water-soluble organosilicon-modified acrylic resin through polymerization. Finally, this application uses the epoxy-modified hyperbranched polysiloxane as a bridge, allowing the epoxy-modified polysiloxane to undergo ring-opening crosslinking with the amino groups on the surface of the modified graphene oxide through epoxy groups, obtaining a modified conductive filler; finally, the condensation of the silanoxy groups between the modified conductive filler and the water-soluble organosilicon-modified acrylic resin yields a conductive filler crosslinked matrix resin.

[0031] This application utilizes γ-methacryloxypropyltrimethoxysilane as a functional monomer to modify water-soluble acrylic resin, obtaining a water-soluble organosilicon-modified acrylic resin. The γ-methacryloxypropyltrimethoxysilane contains Si-OCH3 groups, which improves the waterproof performance of the water-soluble acrylic resin and increases its crosslinking points, thereby enhancing its stability and mechanical properties. This application uses graphene oxide as a raw material, grafting polyaniline molecular weight onto its surface to obtain modified graphene oxide; and utilizes epoxy-based hyperbranched polysiloxane to crosslink the water-soluble organosilicon-modified acrylic resin with the modified graphene oxide to obtain a conductive filler crosslinked matrix resin. Using the prepared conductive filler crosslinked matrix resin as the base material for coatings, the resulting coatings not only possess excellent flexibility but also significantly improve the mechanical properties of the water-soluble acrylic resin.

[0032] This application utilizes graphene oxide, which crosslinks with the base material via molecular chains. This increases the crosslinking points between water-soluble acrylic resin and polyaniline, modifying the strength of the acrylic resin. It also effectively improves the resin's water resistance and extends the coating's service life. The antistatic coating prepared in this application, when applied to the surface of corrugated paper, effectively penetrates the shallow layer of the base paper, combines with the paper fibers, and forms a dense, continuous film on the surface, creating a new material layer. The antistatic coating prepared in this application has both conductive and electrolytic properties, effectively protecting electronic components from the hazards of static electricity and other charges. Using cartons or boxes coated with this antistatic coating to package electronic components reduces the number of steps required in the packaging process. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: The preparation method of modified graphene oxide includes the following steps:

[0035] A1: Add 10g of natural graphite, 200mL of concentrated sulfuric acid, and 5g of sodium nitrate to a reaction flask and disperse evenly. Control the temperature at 1℃. Add 20g of potassium permanganate and control the temperature at 35℃. Keep the reaction at this temperature for 1h. Add 200mL of distilled water and control the temperature at 90℃. Keep the reaction at this temperature for 30min with stirring. Add 20mL of hydrogen peroxide and let it cool naturally to room temperature. Let it stand at room temperature for 24h. After removing the supernatant, wash with 5% dilute hydrochloric acid and distilled water until neutral and dry to obtain graphene oxide.

[0036] A2: 10g of graphene oxide, 200mL of N,N-dimethylformamide, 25g of ethylenediamine, and 3g of dicycloethylcarboimide were added to a reaction flask and dispersed evenly. The temperature was controlled at 100℃ and kept at this temperature for 18h under stirring. After centrifugation, the solid was dispersed in methanol by ultrasonic dispersion, washed, and dried to obtain amino-modified graphene oxide.

[0037] A3: 10g of amination-modified graphene oxide and 200mL of deionized water were added to the reaction vessel and dispersed evenly. 12g of aniline and 100mL of 2mol / L hydrochloric acid aqueous solution were mixed and added to the reaction vessel and dispersed evenly. 15g of ammonium persulfate and 10mL of 1mol / L hydrochloric acid aqueous solution were mixed and added to the reaction vessel. The temperature was controlled at 0℃, and the reaction was kept at this temperature for 12h under stirring. The mixture was washed with water until neutral and dried to obtain modified graphene oxide.

[0038] The preparation method of water-soluble acrylic resin includes the following steps:

[0039] 45g isopropanol, 7.5g methyl methacrylate, 9.5g butyl acrylate, and 1g acrylic acid were added to a reaction vessel and dispersed evenly. The mixture was heated to reflux, and 0.25g azobisisobutyronitrile was added. The temperature was controlled at 80℃. Then, 36g of monomer mixture and 0.75g azobisisobutyronitrile were added. The mixture was kept at 50℃ for 6 hours. Ammonia was added dropwise to adjust the pH to 8, thus obtaining a water-soluble acrylic resin.

[0040] The preparation method of epoxy-based hyperbranched polysiloxanes includes the following steps:

[0041] 10g of γ-glycidyl etheroxypropyltrimethoxysilane and 10mL of deionized water were added to a reaction vessel and dispersed evenly. The temperature was controlled at 50℃ and the reaction was maintained for 0.5h. 0.1mol / L hydrochloric acid aqueous solution was added to adjust the pH to 5 and the reaction was maintained for 3h. Sodium bicarbonate was added to adjust the pH to neutral and the mixture was dried to obtain epoxy hyperbranched polysiloxane.

[0042] Example 2: The preparation method of the conductive filler crosslinked matrix resin includes the following steps:

[0043] S1: Add 40 mL of deionized water, 0.5 g of ammonium persulfate, and 15 g of the water-soluble acrylic resin prepared in Example 1 to a reaction vessel. Control the temperature at 70 °C and react until blue light appears. Add 8 g of methyl methacrylate, 10 g of butyl acrylate, 2.5 g of methacrylic acid, 10 mL of deionized water, and 0.1 g of ammonium persulfate. Keep the reaction at this temperature for 2 h. Add 1 g of γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 1 h. Filter to obtain water-soluble organosilicon-modified acrylic resin.

[0044] S2: 3g of epoxy hyperbranched polysiloxane prepared in Example 1, 10g of modified graphene oxide prepared in Example 1, and 50mL of anhydrous ethanol were added to the reaction vessel and dispersed evenly. The temperature was controlled at 70℃ and kept at the temperature for 24h under stirring. The mixture was then filtered, washed, and dried to obtain the modified conductive filler.

[0045] S3: In an argon atmosphere, 60g of water-soluble organosilicon-modified acrylic resin and 7g of modified conductive filler are added to a reactor and mixed evenly. The temperature is controlled at 65℃, and the reaction is carried out under stirring conditions for h to obtain the conductive filler crosslinked matrix resin.

[0046] Example 3: The preparation method of the conductive filler crosslinked matrix resin includes the following steps:

[0047] S1: Add 40 mL of deionized water, 0.5 g of ammonium persulfate, and 15 g of the water-soluble acrylic resin prepared in Example 1 to a reaction vessel. Control the temperature at 75 °C and react until blue light appears. Add 9 g of methyl methacrylate, 10 g of butyl acrylate, 3 g of methacrylic acid, 10 mL of deionized water, and 0.1 g of ammonium persulfate. Keep the reaction at this temperature for 2-4 h. Add 1.5 g of γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 1.5 h. Filter to obtain water-soluble organosilicon-modified acrylic resin.

[0048] S2: 4.5g of epoxy hyperbranched polysiloxane prepared in Example 1, 10g of modified graphene oxide prepared in Example 1, and 70mL of anhydrous ethanol were added to the reaction vessel and dispersed evenly. The temperature was controlled at 75℃ and kept at the temperature for 24h under stirring. The mixture was then filtered, washed, and dried to obtain the modified conductive filler.

[0049] S3: In an argon atmosphere, 60g of water-soluble organosilicon-modified acrylic resin and 7g of modified conductive filler were added to a reactor and mixed evenly. The temperature was controlled at 70℃, and the reaction was carried out under stirring for 1.5h to obtain the conductive filler crosslinked matrix resin.

[0050] Example 4: The preparation method of the conductive filler crosslinked matrix resin includes the following steps:

[0051] S1: Add 40 mL of deionized water, 0.5 g of ammonium persulfate, and 15 g of the water-soluble acrylic resin prepared in Example 1 to a reaction vessel. Control the temperature at 80 °C and react until blue light appears. Add 10 g of methyl methacrylate, 10 g of butyl acrylate, 3.5 g of methacrylic acid, 10 mL of deionized water, and 0.1 g of ammonium persulfate. Keep the reaction at this temperature for 4 h. Add 2 g of γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 2 h. Filter to obtain water-soluble organosilicon-modified acrylic resin.

[0052] S2: 6g of epoxy hyperbranched polysiloxane prepared in Example 1, 10g of modified graphene oxide prepared in Example 1, and 100mL of anhydrous ethanol were added to the reaction vessel and dispersed evenly. The temperature was controlled at 80℃ and kept at the temperature for 30h under stirring. The mixture was then filtered, washed, and dried to obtain the modified conductive filler.

[0053] S3: In an argon atmosphere, 60g of water-soluble organosilicon-modified acrylic resin and 7g of modified conductive filler were added to a reactor and mixed evenly. The temperature was controlled at 75℃, and the reaction was carried out under stirring conditions for 2 hours to obtain the conductive filler crosslinked matrix resin.

[0054] Example 5: A method for preparing an antistatic corrugated cardboard box, comprising the following steps:

[0055] B1: An antistatic coating was obtained by mixing 80g of the conductive filler crosslinking matrix resin prepared in Example 2, 0.3g of carboxymethyl cellulose, 0.2g of defoamer YCK-700, 0.2g of dispersant Al cosperse 602N, 0.1g of thickener TT-935, 14.4mL of water, and 4.8g of ethanol.

[0056] B2: Apply an antistatic coating to the surface of the corrugated cardboard box using a coating roller. The coating amount of the antistatic ink is 10g / m². 2 Adjust the pressure to 20 kg / cm 2 The temperature is controlled at 160℃ for drying to obtain antistatic corrugated cardboard boxes.

[0057] Example 6: A method for preparing an antistatic corrugated cardboard box, comprising the following steps:

[0058] B1: An antistatic coating was obtained by mixing 80g of the conductive filler crosslinking matrix resin prepared in Example 3, 0.3g of carboxymethyl cellulose, 0.2g of defoamer YCK-700, 0.2g of dispersant Al cosperse 602N, 0.1g of thickener TT-935, 14.4mL of water, and 4.8g of ethanol.

[0059] B2: Apply an antistatic coating to the surface of the corrugated cardboard box using a coating roller. The coating amount of the antistatic ink is 10g / m². 2 Adjust the pressure to 20 kg / cm 2 The temperature is controlled at 160℃ for drying to obtain antistatic corrugated cardboard boxes.

[0060] Example 7: A method for preparing an antistatic corrugated cardboard box, comprising the following steps:

[0061] B1: An antistatic coating was obtained by mixing 80g of the conductive filler crosslinking matrix resin prepared in Example 4, 0.3g of carboxymethyl cellulose, 0.2g of defoamer YCK-700, 0.2g of dispersant Al cosperse 602N, 0.1g of thickener TT-935, 14.4mL of water, and 4.8g of ethanol.

[0062] B2: Apply an antistatic coating to the surface of the corrugated cardboard box using a coating roller. The coating amount of the antistatic ink is 10g / m². 2 Adjust the pressure to 20 kg / cm 2 The temperature is controlled at 160℃ for drying to obtain antistatic corrugated cardboard boxes.

[0063] The preparation method of the modified graphene oxide in Comparative Example 1 includes the following steps:

[0064] A1: Add 10g of natural graphite, 200mL of concentrated sulfuric acid, and 5g of sodium nitrate to a reaction flask and disperse evenly. Control the temperature at 1℃. Add 20g of potassium permanganate and control the temperature at 35℃. Keep the reaction at this temperature for 1h. Add 200mL of distilled water and control the temperature at 90℃. Keep the reaction at this temperature for 30min with stirring. Add 20mL of hydrogen peroxide and let it cool naturally to room temperature. Let it stand at room temperature for 24h. After removing the supernatant, wash with 5% dilute hydrochloric acid and distilled water until neutral and dry to obtain graphene oxide.

[0065] A2: Add 10g of graphene oxide, 200mL of N,N-dimethylformamide, 25g of ethylenediamine, and 3g of dicycloethylcarboimide to a reaction flask and disperse evenly. Control the temperature at 100-110℃ and keep warm for 18h under stirring. After centrifugation, take the solid and disperse it in methanol by ultrasonic dispersion, wash and dry to obtain modified graphene oxide.

[0066] The preparation method of the conductive filler crosslinked matrix resin in Comparative Example 2 includes the following steps:

[0067] S1: Add 40 mL of deionized water, 0.5 g of ammonium persulfate, and 15 g of the water-soluble acrylic resin prepared in Example 1 to a reaction vessel. Control the temperature at 75 °C and react until blue light appears. Add 9 g of methyl methacrylate, 10 g of butyl acrylate, 3 g of methacrylic acid, 10 mL of deionized water, and 0.1 g of ammonium persulfate. Keep the reaction at this temperature for 2-4 h. Add 1.5 g of γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 1.5 h. Filter to obtain water-soluble organosilicon-modified acrylic resin.

[0068] S2: 4.5g of epoxy hyperbranched polysiloxane prepared in Example 1, 10g of modified graphene oxide prepared in Comparative Example 1, and 70mL of anhydrous ethanol were added to the reaction vessel and dispersed evenly. The temperature was controlled at 75℃ and kept at the temperature for 24h under stirring. The mixture was then filtered, washed, and dried to obtain the modified conductive filler.

[0069] S3: In an argon atmosphere, 60g of water-soluble organosilicon-modified acrylic resin and 7g of modified conductive filler were added to a reactor and mixed evenly. The temperature was controlled at 70℃, and the reaction was carried out under stirring for 1.5h to obtain the conductive filler crosslinked matrix resin.

[0070] The preparation method of the conductive filler crosslinked matrix resin in Comparative Example 3 includes the following steps:

[0071] S1: 4.5g of epoxy hyperbranched polysiloxane prepared in Example 1, 10g of modified graphene oxide prepared in Comparative Example 2, and 70mL of anhydrous ethanol were added to a reaction vessel and dispersed evenly. The temperature was controlled at 75℃ and kept at the temperature for 24h under stirring. The mixture was then filtered, washed, and dried to obtain the modified conductive filler.

[0072] S2: In an argon atmosphere, 60g of the water-soluble acrylic resin prepared in Example 1 and 7g of the modified conductive filler were added to the reactor and mixed evenly. The temperature was controlled at 70°C, and the reaction was carried out under stirring for 1.5h to obtain the conductive filler crosslinked matrix resin.

[0073] The preparation method of the conductive filler crosslinked matrix resin in Comparative Example 4 includes the following steps:

[0074] S1: Add 40 mL of deionized water, 0.5 g of ammonium persulfate, and 15 g of the water-soluble acrylic resin prepared in Example 1 to a reaction vessel. Control the temperature at 75 °C and react until blue light appears. Add 9 g of methyl methacrylate, 10 g of butyl acrylate, 3 g of methacrylic acid, 10 mL of deionized water, and 0.1 g of ammonium persulfate. Keep the reaction at this temperature for 2-4 h. Add 1.5 g of γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 1.5 h. Filter to obtain water-soluble organosilicon-modified acrylic resin.

[0075] S3: Add 60g of water-soluble organosilicon-modified acrylic resin and 7g of the modified conductive filler prepared in Example 3 to the reaction vessel and mix evenly. Control the temperature at 70℃ and keep the reaction at this temperature for 1.5h under stirring to obtain the conductive filler crosslinked matrix resin.

[0076] Compared with Example 6, Comparative Example 5 only replaced the conductive filler crosslinking matrix resin added in Example 6 with the conductive filler crosslinking matrix resin prepared in Comparative Example 2 in an equal amount. The remaining components and preparation methods were completely the same as those in Example 6.

[0077] Compared with Example 6, Comparative Example 6 only replaced the conductive filler crosslinking matrix resin added in Example 6 with the conductive filler crosslinking matrix resin prepared in Comparative Example 3 in an equal amount. The remaining components and preparation methods were completely the same as those in Example 6.

[0078] Compared with Example 6, Comparative Example 7 only replaced the conductive filler crosslinking matrix resin added in Example 6 with the conductive filler crosslinking matrix resin prepared in Comparative Example 4 in an equal amount. The remaining components and preparation methods were completely the same as those in Example 6.

[0079] Performance testing

[0080] (1) Coating surface resistivity: The resistivity was tested according to GJB2604-1996 "General Specification for Military Electromagnetic Shielding Coatings". The test results are shown in Table 1.

[0081] (2) Coating abrasion resistance: After coating and drying the antistatic coatings prepared in Examples 5-7 and Comparative Examples 5-7 on red solid-backprinted white cardboard, the coating coverage was 10 g / m². 2The coating surface resistivity was tested again after 1000 rubs using a rubbing decolorization tester with a force of 4 pounds. The test results are shown in Table 1.

[0082] Table 1: Performance Test Data Statistics of Examples 5-7 and Comparative Examples 5-7

[0083]

[0084] As shown in Table 1, the antistatic coating prepared in this application, when applied to the surface of corrugated cardboard boxes, imparts excellent antistatic effects to the corrugated cardboard boxes. Moreover, the coating has good adhesion to the cardboard box surface, and the organic combination of conductive filler and base material greatly improves the retention rate of the antistatic effect of the coating after friction.

[0085] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A method for preparing an antistatic corrugated cardboard box, characterized in that, The process includes the following steps: applying an antistatic coating to the surface of the corrugated cardboard box, hot-pressing and drying to obtain an antistatic corrugated cardboard box; The antistatic coating comprises the following raw materials by weight percentage: 60-80% conductive filler crosslinked matrix resin, 0.2-0.4% auxiliary film-forming agent, 0.5-1% functional additives, and the balance being solvent, with the sum of the weight percentages of the raw materials being 100%. The preparation method of the conductive filler crosslinked matrix resin includes the following steps: S1: Add some deionized water, some ammonium persulfate, and water-soluble acrylic resin to a reactor, control the temperature at 70-80℃, and react until blue light appears. Add methyl methacrylate, butyl acrylate, methacrylic acid, the remaining deionized water, and the remaining ammonium persulfate. Keep the reaction at this temperature for 2-4 hours. Add γ-methacryloyloxypropyltrimethoxysilane and keep the reaction at this temperature for 1-2 hours. Filter to obtain water-soluble organosilicon-modified acrylic resin. S2: Add epoxy-based hyperbranched polysiloxane, modified graphene oxide, and anhydrous ethanol to a reaction vessel and disperse them evenly. Control the temperature at 70-80℃ and keep it at this temperature for 24-30 hours under stirring. Filter, wash, and dry to obtain the modified conductive filler. S3: In an argon atmosphere, water-soluble organosilicon-modified acrylic resin and modified conductive filler are added to a reaction vessel and mixed evenly. The temperature is controlled at 65-75℃, and the reaction is maintained at this temperature for 1-2 hours under stirring to obtain a conductive filler crosslinked matrix resin. The mass ratio of ammonium persulfate added in S1 before and after the two additions is 3-4.2:1; the mass ratio of deionized water added in S1 before and after the two additions is 3.5-5.5:1; the addition ratio of deionized water, ammonium persulfate, water-soluble acrylic resin, methyl methacrylate, butyl acrylate, methacrylic acid, and γ-methacryloyloxypropyltrimethoxysilane in S1 is 40-50mL:0.6-1g:10-20g:8-10g:10g:2.5-3.5g:1-2g; The addition ratio of epoxy hyperbranched polysiloxane, modified graphene oxide, and anhydrous ethanol in S2 is 3-6g:10g:50-100mL. The mass ratio of water-soluble organosilicon-modified acrylic resin to modified conductive filler in S3 is 50-70:5-10.

2. The method for preparing an antistatic corrugated cardboard box according to claim 1, characterized in that, The preparation method of the epoxy-based hyperbranched polysiloxane includes the following steps: γ-glycidoxypropyltrimethoxysilane and deionized water were added to a reaction vessel and dispersed evenly. The temperature was controlled at 45-55℃ and the reaction was maintained at this temperature for 0.5-1h. The pH was adjusted to 5-6 and the reaction was maintained at this temperature for 3-6h. The pH was then adjusted to neutral and the mixture was dried to obtain epoxy hyperbranched polysiloxane.

3. The method for preparing an antistatic corrugated cardboard box according to claim 1, characterized in that, The preparation method of the modified graphene oxide includes the following steps: A1: Graphene oxide, N,N-dimethylformamide, ethylenediamine, and dicycloethylcarboimide were added to a reaction flask and dispersed evenly. The temperature was controlled at 100-110℃ and kept at this temperature for 12-24 hours under stirring. After centrifugation, the solid was dispersed in methanol by ultrasonic dispersion, washed, and dried to obtain amination-modified graphene oxide. A2: Amination-modified graphene oxide and deionized water are added to a reaction vessel and dispersed evenly. Aniline and hydrochloric acid solution component one are mixed and added to the reaction vessel and dispersed evenly. Ammonium persulfate and hydrochloric acid solution component two are mixed and added to the reaction vessel. The temperature is controlled at 0-5℃, and the reaction is carried out under stirring for 12-15 hours. The mixture is washed with water until neutral and dried to obtain modified graphene oxide.

4. The method for preparing an antistatic corrugated cardboard box according to claim 1, characterized in that, The auxiliary film-forming agent is carboxymethyl cellulose; the solvent is a mixture of water and ethanol in a mass ratio of 3:1-2.

5. The method for preparing an antistatic corrugated cardboard box according to claim 1, characterized in that, The functional additives include defoamers, dispersants, and thickeners; the defoamers account for 0.1-0.2% of the total mass of the antistatic coating; the dispersants account for 0.2-0.5% of the total mass of the antistatic coating; and the thickeners account for 0.1-0.3% of the total mass of the antistatic coating.

6. The method for preparing an antistatic corrugated cardboard box according to claim 1, characterized in that, The coating amount of the antistatic coating is 5-15 g / m². 2 .

7. An antistatic corrugated cardboard box, characterized in that, It is prepared by the preparation method described in any one of claims 1-6.

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