Antistatic corrugated carton and preparation method thereof

Abstract

The invention discloses an antistatic corrugated carton and a preparation method thereof, and relates to the technical field of packaging materials. The invention discloses a preparation method of an anti-static corrugated carton, which comprises the following steps: coating the surface of the corrugated carton with an anti-static coating, and hot-pressing and drying to obtain the anti-static corrugated carton, the antistatic coating comprises the following raw materials in percentage by weight: 60-80% of conductive filler crosslinking matrix resin, 0.2-0.4% of an auxiliary film forming matter, 0.5-1% of a functional aid and the balance of a solvent, and the sum of the weight percentages of the raw materials is 100%. The graphene oxide is organically modified, the modified graphene oxide and the water-soluble acrylic resin are cross-linked through chemical modification to serve as a base material of the coating, and the prepared coating has the advantages of being good in anti-static effect and good in wear resistance and humidity resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging materials, and particularly relates to an antistatic corrugated cardboard box and a preparation method thereof. Background Art

[0002] With the rapid development of the electronics industry, products such as electronic instruments and equipment are developing towards miniaturization, multi-functionality, and intelligence. Semiconductors, large-scale and ultra-large-scale integrated circuits, and high-density integrated circuits have become widely used devices in the electronics industry. The high degree of product integration has led to an increasing electromagnetic induction sensitivity, making it extremely vulnerable to electromagnetic and static electricity interference. For example, electron tubes, integrated circuit boards, and electronic connection components are likely to have their technical parameters affected by the static electricity voltage generated during production, transportation, storage, and use due to friction, impact, contact, and separation, reducing stability or even causing product failure. Therefore, electrostatic protection packaging is particularly important.

[0003] Electrostatic protection packaging uses packaging materials that do not generate frictional charges to reduce or eliminate the frictional charges generated during the handling and use of the package, preventing damage to electrostatic-sensitive products caused by electrostatic discharge, so as to achieve the purpose of packaging protection. Currently, the antistatic corrugated cardboard boxes on the market basically print a functional coating on the surface of the cardboard box through a printing machine. However, the adhesion between the coating and the surface of the cardboard box is very poor, the printed layer is uneven, and the thickness is difficult to control. Moreover, the main conductive component of these coatings is carbon particles, and the carbon particles in the coating are extremely easy to fall off from the surface of the cardboard box, not only affecting the conductivity of the coating, but also polluting the environment. Summary of the Invention

[0004] The purpose of the present invention is to provide an antistatic corrugated cardboard box and a preparation method thereof, and solve the following technical problems:

[0005] In the prior art, by adding conductive carbon particles to the coating and coating the coating on the surface of the corrugated cardboard box to endow the cardboard box with antistatic effect, but the carbon particles in the coating are extremely easy to fall off from the surface of the cardboard box, not only affecting the conductivity of the coating, but also polluting the environment.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

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

[0008] The antistatic coating includes raw materials in the following weight percentages: 60-80% conductive filler crosslinked matrix resin, 0.2-0.4% auxiliary film-forming agent, 0.5-1% functional additive, and the balance is solvent, and the sum of the weight percentages of the raw materials is 100%;

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

[0010] S1: Add part of deionized water, part of ammonium persulfate, and water-soluble acrylic resin into a reaction kettle, control the temperature at 70 - 80 °C, react until blue light appears, add methyl methacrylate, butyl acrylate, methacrylic acid, the remaining deionized water, and the remaining ammonium persulfate, keep the temperature for reaction for 2 - 4 h, add γ-methacryloxypropyltrimethoxysilane, keep the temperature for reaction for 1 - 2 h, filter to obtain water-soluble organosilicon-modified acrylic resin;

[0011] S2: Add epoxy-based hyperbranched polysiloxane, modified graphene oxide, and absolute ethanol into a reaction kettle and disperse evenly, control the temperature at 70 - 80 °C, keep the temperature for 24 - 30 h under stirring conditions, carry out suction filtration, washing, and drying to obtain modified conductive filler;

[0012] S3: In an argon atmosphere, add the water-soluble organosilicon-modified acrylic resin and the modified conductive filler into a reaction kettle and mix evenly, control the temperature at 65 - 75 °C, keep the temperature for reaction for 1 - 2 h under stirring conditions to obtain the conductive filler crosslinked matrix resin.

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

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

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

[0016] As a further scheme of the present invention: The preparation method of the epoxy-based hyperbranched polysiloxane comprises the following steps: Add γ-glycidyletheroxypropyltrimethoxysilane and deionized water into a reaction kettle and disperse evenly, control the temperature at 45 - 55 °C, keep the temperature for reaction for 0.5 - 1 h, adjust the pH to 5 - 6, keep the temperature for reaction for 3 - 6 h, adjust the pH to neutral, and dry to obtain the epoxy-based hyperbranched polysiloxane.

[0017] As a further solution of the present invention: the addition ratio of γ-glycidoxypropyltrimethoxysilane to deionized water is 10 g: 10 - 20 mL.

[0018] As a further solution of the present invention: the preparation method of modified graphene oxide comprises the following steps:

[0019] A1: Add graphene oxide, N,N-dimethylformamide, ethylenediamine, and dicyclohexylcarbodiimide into a reaction flask and disperse them evenly. Control the temperature at 100 - 110 °C, keep warm for 12 - 24 h under stirring conditions, take the solid after centrifugation, disperse it in methanol and perform ultrasonic dispersion, wash and dry to obtain amino-functionalized graphene oxide;

[0020] A2: Add amino-functionalized graphene oxide and deionized water into a reaction kettle and disperse them evenly. Mix the aniline and hydrochloric acid solution component one and add them into the reaction kettle to disperse evenly. Mix the ammonium persulfate and hydrochloric acid solution component two and add them into the reaction kettle. Control the temperature at 0 - 5 °C, keep warm and react for 12 - 15 h under stirring conditions, wash until neutral and dry to obtain modified graphene oxide.

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

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

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

[0024] As a further solution 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; the thickener accounts for 0.1 - 0.3% of the total mass of the electrostatic coating.

[0025] As a further solution of the present invention: the defoamer is a silicone defoamer; the dispersant is an acrylate-based aqueous dispersant.

[0026] As a further solution of the present invention: the specific steps of hot pressing and drying are: adjust the pressure to 10 - 25 Kg / cm 2, control the drying temperature at 160 - 170 °C.

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

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

[0029] The beneficial effects of the present invention:

[0030] In this application, first, the condensation method is used to modify graphene oxide prepared by the Hummers method with ethylenediamine to obtain amino-functionalized graphene oxide; and the amino group of the amino-functionalized graphene oxide is polymerized with aniline to obtain modified graphene oxide. Then, the epoxy-functionalized hyperbranched polysiloxane is prepared by using the silane coupling agent γ-glycidoxypropyltrimethoxysilane. Then, methyl methacrylate, butyl acrylate, and methacrylic acid are used as the main monomers, and γ-methacryloxypropyltrimethoxysilane is added as a functional monomer to prepare a water-soluble organosilicon-modified acrylic resin by polymerization. Finally, the epoxy-functionalized hyperbranched polysiloxane is used as a bridge, and the epoxy-functionalized hyperbranched polysiloxane undergoes ring-opening crosslinking with the amino group on the surface of the modified graphene oxide through the epoxy group to obtain a modified conductive filler; finally, the silanol groups between the modified conductive filler and the water-soluble organosilicon-modified acrylic resin undergo condensation to obtain a conductive filler crosslinked matrix resin.

[0031] In this application, γ-methacryloxypropyltrimethoxysilane is used as a functional monomer to modify the water-soluble acrylic resin to obtain a water-soluble organosilicon-modified acrylic resin; γ-methacryloxypropyltrimethoxysilane contains Si - OCH 3 groups, which improve the waterproof performance of the water-soluble acrylic resin, and can also increase the crosslinking points of the water-soluble acrylic resin, improving the stability and mechanical properties of the water-soluble acrylic resin. In this application, graphene oxide is used as a raw material, and the molecular weight of polyaniline is grafted on the surface to obtain modified graphene oxide; and the epoxy-functionalized hyperbranched polysiloxane is used to crosslink the water-soluble organosilicon-modified acrylic resin and the modified graphene oxide to obtain a conductive filler crosslinked matrix resin. The conductive filler crosslinked matrix resin prepared in this application is used as the base material of the coating, and the prepared coating not only has excellent flexibility but also significantly improves the mechanical properties of the water-soluble acrylic resin.

[0032] In the present application, graphene oxide crosslinks with the base material through molecular chains, which can increase the crosslinking points between water-soluble acrylic resin and polyaniline, and improve the strength of the modified acrylic resin; it can also effectively improve the water resistance of the resin and extend the service life of the coating. The antistatic coating prepared in the present application is coated on the surface of corrugated paper. The antistatic coating can effectively penetrate into the shallow surface layer of the base paper, combine with the paper fibers, and form a dense and continuous coating film on the surface, forming a new material layer; the antistatic coating prepared in the present application has the functions of conduction and electrolysis, and can effectively protect electronic components from the hazards of static electricity and other charges. Using cartons or cartons coated with antistatic coating to package electronic components can save the operation steps in the packaging process. Detailed implementation mode

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

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

[0035] A1: Add 10 g of natural graphite, 200 mL of concentrated sulfuric acid, and 5 g of sodium nitrate into a reaction flask and disperse evenly. Control the temperature at 1 °C, add 20 g of potassium permanganate, control the temperature at 35 °C, and keep the reaction for 1 h; add 200 mL of distilled water, control the temperature at 90 °C, keep the temperature for 30 min under stirring conditions, add 20 mL of hydrogen peroxide, cool naturally to room temperature, stand still at room temperature for 24 h, remove the supernatant, and wash with 5% dilute hydrochloric acid and distilled water until neutral and dry to obtain graphene oxide;

[0036] A2: Add 10 g of graphene oxide, 200 mL of N,N-dimethylformamide, 25 g of ethylenediamine, and 3 g of dicyclohexylcarbodiimide into a reaction flask and disperse evenly. Control the temperature at 100 °C, keep the reaction for 18 h under stirring conditions, centrifuge, take the solid matter, disperse it in methanol, perform ultrasonic dispersion, wash and dry to obtain amino-functionalized graphene oxide;

[0037] A3: Add 10 g of amino-functionalized graphene oxide and 200 mL of deionized water into a reaction kettle and disperse evenly. Mix 12 g of aniline and 100 mL of 2 mol / L hydrochloric acid aqueous solution and add them into the reaction kettle to disperse evenly. Mix 15 g of ammonium persulfate and 10 mL of 1 mol / L hydrochloric acid aqueous solution and add them into the reaction kettle. Control the temperature at 0 °C, keep the reaction for 12 h under stirring conditions, wash until neutral and dry to obtain modified graphene oxide.

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

[0039] Disperse 45 g of isopropanol, 7.5 g of methyl methacrylate, 9.5 g of butyl acrylate, and 1 g of acrylic acid evenly in a reaction kettle, heat up to reflux, add 0.25 g of azobisisobutyronitrile, control the temperature at 80 °C, add 36 g of monomer mixture and 0.75 g of azobisisobutyronitrile, keep the temperature for reaction for 6 h, control the temperature at 50 °C, dropwise add ammonia water to adjust the pH to 8 to obtain a water-soluble acrylic resin.

[0040] The preparation method of epoxy group hyperbranched polysiloxane comprises the following steps:

[0041] Add 10 g of γ-glycidoxypropyltrimethoxysilane and 10 mL of deionized water into a reaction kettle and disperse evenly, control the temperature at 50 °C, keep the temperature for reaction for 0.5 h, add 0.1 mol / L hydrochloric acid aqueous solution to adjust the pH to 5, keep the temperature for reaction for 3 h, add sodium bicarbonate to adjust the pH to neutral, and dry to obtain epoxy group hyperbranched polysiloxane.

[0042] The preparation method of the conductive filler crosslinked matrix resin in Example 2 comprises 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 into a reaction kettle, control the temperature at 70 °C, 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 temperature for reaction for 2 h, add 1 g of γ-methacryloxypropyltrimethoxysilane, keep the temperature for reaction for 1 h, and filter to obtain a water-soluble organosilicon-modified acrylic resin;

[0044] S2: Add 3 g of the epoxy group hyperbranched polysiloxane prepared in Example 1, 10 g of the modified graphene oxide prepared in Example 1, and 50 mL of absolute ethanol into a reaction kettle and disperse evenly, control the temperature at 70 °C, keep the temperature for 24 h under stirring conditions, carry out suction filtration, washing, and drying to obtain a modified conductive filler;

[0045] S3: In an argon atmosphere, add 60 g of the water-soluble organosilicon-modified acrylic resin and 7 g of the modified conductive filler into a reaction kettle and mix evenly, control the temperature at 65 °C, keep the temperature for reaction for h under stirring conditions to obtain a conductive filler crosslinked matrix resin.

[0046] The preparation method of the conductive filler crosslinked matrix resin in Example 3 comprises 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 into a reaction kettle. Control the temperature at 75 °C and react until blue light appears. Then 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 temperature for reaction for 2 - 4 h, add 1.5 g of γ-methacryloxypropyltrimethoxysilane, and keep the temperature for reaction for 1.5 h. Filter to obtain the water-soluble organosilicon-modified acrylic resin;

[0048] S2: Add 4.5 g of the epoxy group hyperbranched polysiloxane prepared in Example 1, 10 g of the modified graphene oxide prepared in Example 1, and 70 mL of absolute ethanol into a reaction kettle and disperse evenly. Control the temperature at 75 °C and keep the temperature for 24 h under stirring conditions. Filter with suction, wash, and dry to obtain the modified conductive filler;

[0049] S3: In an argon atmosphere, add 60 g of the water-soluble organosilicon-modified acrylic resin and 7 g of the modified conductive filler into a reaction kettle and mix evenly. Control the temperature at 70 °C and keep the temperature for reaction for 1.5 h under stirring conditions to obtain the conductive filler cross-linked matrix resin.

[0050] The preparation method of the conductive filler cross-linked matrix resin in Example 4 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 into a reaction kettle. Control the temperature at 80 °C and react until blue light appears. Then 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 temperature for reaction for 4 h, add 2 g of γ-methacryloxypropyltrimethoxysilane, and keep the temperature for reaction for 2 h. Filter to obtain the water-soluble organosilicon-modified acrylic resin;

[0052] S2: Add 6 g of the epoxy group hyperbranched polysiloxane prepared in Example 1, 10 g of the modified graphene oxide prepared in Example 1, and 100 mL of absolute ethanol into a reaction kettle and disperse evenly. Control the temperature at 80 °C and keep the temperature for 30 h under stirring conditions. Filter with suction, wash, and dry to obtain the modified conductive filler;

[0053] S3: In an argon atmosphere, add 60 g of the water-soluble organosilicon-modified acrylic resin and 7 g of the modified conductive filler into a reaction kettle and mix evenly. Control the temperature at 75 °C and keep the temperature for reaction for 2 h under stirring conditions to obtain the conductive filler cross-linked matrix resin.

[0054] Example 5 The preparation method of an antistatic corrugated cardboard box includes the following steps:

[0055] B1: Mix 80 g of the conductive filler crosslinked matrix resin prepared in Example 2, 0.3 g of carboxymethyl cellulose, 0.2 g of defoamer YCK-700, 0.2 g of dispersant Al cosperse 602N, 0.1 g of thickener TT-935, 14.4 mL of water, and 4.8 g of ethanol to obtain an antistatic coating;

[0056] B2: Coat the antistatic coating on the surface of the corrugated cardboard box using a coating roller. The coating amount of the antistatic ink is 10 g / m 2 , adjust the pressure to 20 Kg / cm 2 , and control the temperature at 160 °C for drying to obtain an antistatic corrugated cardboard box.

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

[0058] B1: Mix 80 g of the conductive filler crosslinked matrix resin prepared in Example 3, 0.3 g of carboxymethyl cellulose, 0.2 g of defoamer YCK-700, 0.2 g of dispersant Al cosperse 602N, 0.1 g of thickener TT-935, 14.4 mL of water, and 4.8 g of ethanol to obtain an antistatic coating;

[0059] B2: Coat the antistatic coating on the surface of the corrugated cardboard box using a coating roller. The coating amount of the antistatic ink is 10 g / m 2 , adjust the pressure to 20 Kg / cm 2 , and control the temperature at 160 °C for drying to obtain an antistatic corrugated cardboard box.

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

[0061] B1: Mix 80 g of the conductive filler crosslinked matrix resin prepared in Example 4, 0.3 g of carboxymethyl cellulose, 0.2 g of defoamer YCK-700, 0.2 g of dispersant Al cosperse 602N, 0.1 g of thickener TT-935, 14.4 mL of water, and 4.8 g of ethanol to obtain an antistatic coating;

[0062] B2: Coat the antistatic coating on the surface of the corrugated cardboard box using a coating roller. The coating amount of the antistatic ink is 10 g / m 2 , adjust the pressure to 20 Kg / cm 2 , and control the temperature at 160 °C for drying to obtain an antistatic corrugated cardboard box.

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

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

[0065] A2: Add 10 g of graphene oxide, 200 mL of N,N-dimethylformamide, 25 g of ethylenediamine, and 3 g of dicyclohexylcarbodiimide into a reaction flask and disperse them evenly. Control the temperature at 100 - 110 °C, keep the temperature for 18 h under stirring conditions. After centrifugation, take the solid and disperse it in methanol and perform ultrasonic dispersion, then 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 into a reaction kettle, control the temperature at 75 °C, 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 for 2 - 4 h, add 1.5 g of γ-methacryloyloxypropyltrimethoxysilane, keep the reaction for 1.5 h, and then filter to obtain the water-soluble organosilicon-modified acrylic resin;

[0068] S2: Add 4.5 g of the epoxy-group hyperbranched polysiloxane prepared in Example 1, 10 g of the modified graphene oxide prepared in Comparative Example 1, and 70 mL of absolute ethanol into a reaction kettle and disperse them evenly. Control the temperature at 75 °C, keep the temperature for 24 h under stirring conditions, then perform suction filtration, washing, and drying to obtain the modified conductive filler;

[0069] S3: In an argon atmosphere, add 60 g of the water-soluble organosilicon-modified acrylic resin and 7 g of the modified conductive filler into a reaction kettle and mix them evenly. Control the temperature at 70 °C, keep the temperature for 1.5 h under stirring conditions 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: Add 4.5 g of the epoxy-group hyperbranched polysiloxane prepared in Example 1, 10 g of the modified graphene oxide prepared in Comparative Example 2, and 70 mL of absolute ethanol into a reaction kettle and disperse them evenly. Control the temperature at 75 °C, keep the temperature for 24 h under stirring conditions, then perform suction filtration, washing, and drying to obtain the modified conductive filler;

[0072] S2: In an argon atmosphere, add 60 g of the water-soluble acrylic resin prepared in Example 1 and 7 g of the modified conductive filler into a reaction kettle, mix evenly, control the temperature at 70 °C, and keep the reaction for 1.5 h under stirring conditions to obtain a conductive filler cross-linked matrix resin.

[0073] The preparation method of the conductive filler cross-linked 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 into a reaction kettle, control the temperature at 75 °C, 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 for 2 - 4 h, add 1.5 g of γ-methacryloxypropyltrimethoxysilane, keep the reaction for 1.5 h, and filter to obtain a water-soluble organosilicon-modified acrylic resin;

[0075] S3: Add 60 g of the water-soluble organosilicon-modified acrylic resin and 7 g of the modified conductive filler prepared in Example 3 into a reaction kettle, mix evenly, control the temperature at 70 °C, and keep the reaction for 1.5 h under stirring conditions to obtain a conductive filler cross-linked matrix resin.

[0076] Compared with Example 6, in Comparative Example 5, only the conductive filler cross-linked matrix resin added in Example 6 was replaced with the conductive filler cross-linked matrix resin prepared in Comparative Example 2 in equal amount, and the other components and preparation methods were exactly the same as those in Example 6.

[0077] Compared with Example 6, in Comparative Example 6, only the conductive filler cross-linked matrix resin added in Example 6 was replaced with the conductive filler cross-linked matrix resin prepared in Comparative Example 3 in equal amount, and the other components and preparation methods were exactly the same as those in Example 6.

[0078] Compared with Example 6, in Comparative Example 7, only the conductive filler cross-linked matrix resin added in Example 6 was replaced with the conductive filler cross-linked matrix resin prepared in Comparative Example 4 in equal amount, and the other components and preparation methods were exactly the same as those in Example 6.

[0079] Performance detection

[0080] (1) Surface resistivity of the coating: Detect according to GJB2604-1996 "General Specification for Military Electromagnetic Shielding Coatings", and the detection results are shown in Table 1;

[0081] (2) Abrasion resistance of the coating: After coating the anti-static coatings prepared in Examples 5 - 7 and Comparative Examples 5 - 7 on red solid-bottom printed whiteboard paper and drying, the coating rate is 10 g / m 2, conduct friction using a friction decolorization tester with a force of 4 pounds applied. After 1000 times of friction, detect the surface resistivity of the coating again. The test results are shown in Table 1;

[0082] Table 1: Statistical table of performance test data for Examples 5 - 7 and Comparative Examples 5 - 7

[0083]

[0084] As can be seen from Table 1, the antistatic coating prepared in this application is coated on the surface of the corrugated cardboard box, endowing the corrugated cardboard box with excellent antistatic effect. Moreover, its coating has good adhesion on the surface of the cardboard box, and the conductive filler and the base material are organically compounded, greatly improving the retention rate of the antistatic effect of the coating after friction.

[0085] The above has described a specific embodiment of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A method for preparing an antistatic corrugated paper box, characterized in that: The method comprises the following steps: coating the surface of the corrugated paper box with antistatic coating, hot pressing and drying, so as to obtain the antistatic corrugated paper box; The antistatic coating comprises the following raw materials in weight percentage: 60-80% conductive filler cross-linked matrix resin, 0.2-0.4% auxiliary film-forming material, 0.5-1% functional additive, and the balance is solvent, and the sum of the weight percentages of the raw materials is 100%; The preparation method of the conductive filler cross-linked matrix resin comprises the following steps: S1: Add part of deionized water, part of ammonium persulfate, and water-soluble acrylic resin into a reactor, control the temperature at 70-80°C, react until blue light appears, add methyl methacrylate, butyl acrylate, methacrylic acid, remaining deionized water, and remaining ammonium persulfate, keep the temperature for reaction for 2-4 hours, add γ-methacryloxypropyltrimethoxysilane, keep the temperature for reaction for 1-2 hours, filter, and obtain a water-soluble silicone-modified acrylic resin; S2: adding epoxy hyperbranched polysiloxane, modified graphene oxide and anhydrous ethanol into a reaction kettle and dispersing them uniformly, controlling the temperature at 70-80° C., keeping the temperature under stirring for 24-30 hours, filtering, washing and drying to obtain a modified conductive filler; S3: In an argon atmosphere, add water-soluble silicone modified acrylic resin and modified conductive filler into a reaction kettle and mix them evenly. Control the temperature at 65-75° C. and keep the mixture warm for 1-2 hours under stirring to obtain a conductive filler cross-linked matrix resin.

2. The method for preparing an antistatic corrugated paper box according to claim 1, characterized in that: 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-methacryloxypropyltrimethoxysilane in S1 is 40-50mL: 0.6-1g: 10-20g: 8-10g: 10g: 2.5-3.5g: 1-2g.

3. The method for preparing an antistatic corrugated paper box according to claim 1, characterized in that: The addition ratio of epoxy hyperbranched polysiloxane, modified graphene oxide and anhydrous ethanol in S2 is 3-6 g: 10 g: 50-100 mL.

4. The method for preparing an antistatic corrugated paper box according to claim 1, characterized in that: The mass ratio of the water-soluble silicone-modified acrylic resin to the modified conductive filler in S3 is 50-70:5-10.

5. The method for preparing an antistatic corrugated paper box according to claim 1, characterized in that: The preparation method of the epoxy hyperbranched polysiloxane comprises the following steps: Add γ-glycidyloxypropyltrimethoxysilane and deionized water into a reaction kettle and disperse them evenly. Control the temperature at 45-55° C., keep the reaction warm for 0.5-1 hour, adjust the pH to 5-6, keep the reaction warm for 3-6 hours, adjust the pH to neutral, and dry to obtain epoxy hyperbranched polysiloxane.

6. The method for preparing an antistatic corrugated paper box according to claim 1, characterized in that: The preparation method of the modified graphene oxide comprises the following steps: A1: Add graphene oxide, N,N-dimethylformamide, ethylenediamine and dicyclohexylcarbodiimide into a reaction bottle and disperse them evenly. Control the temperature at 100-110°C and keep the temperature under stirring for 12-24 hours. After centrifugation, take the solid and disperse it in methanol by ultrasonic dispersion, wash and dry to obtain aminated graphene oxide. A2: Add aminated graphene oxide and deionized water into a reactor and disperse them evenly. Mix aniline and hydrochloric acid solution component 1 and add them into the reactor and disperse them evenly. Mix ammonium persulfate and hydrochloric acid solution component 2 and add them into the reactor. Control the temperature at 0-5°C, keep the reaction warm for 12-15h under stirring, wash with water until neutral, and dry to obtain modified graphene oxide.

7. The method for preparing an antistatic corrugated paper 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.

8. The method for preparing an antistatic corrugated paper 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 electrostatic coating.

9. The method for preparing an antistatic corrugated paper box according to claim 1, characterized in that: The coating amount of the antistatic ink is 5-15g / m 2 . 10.An antistatic corrugated paper box, characterized in that: Prepared by the preparation method described in any one of claims 1 to 9.

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