Environment-friendly flame-retardant packaging box and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, and discloses an environment-friendly flame-retardant packaging box and a preparation method thereof.The environment-friendly flame-retardant packaging box has the advantages that special grey board paper is fixed, cutting dies are formed according to the sizes of different products, shapes are cut by a die cutting indentation machine after opening, and the right angle of the edge of the packaging box is straighter by a v-groove forming technology; the side face of a grey board main body material is wrapped and hidden by automatic edge painting machine oil, so that the side face is more attractive and smoother, a box body material is formed, finally bevel edge cutting is conducted, then a lining is assembled and formed, then a triazinyl flame retardant is sprayed to the surface of the box body material, drying is conducted, and the environment-friendly flame-retardant packaging box is obtained. A boron element, a silicon element, a nitrogen element, a sulfur element, a guanidyl group, a triazinyl group and a carbon nano tube contained in the triazinyl flame retardant all have good flame retardant effects and jointly form a flame retardant system. And meanwhile, the grey board adopted by the packaging box has better environmental protection property.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to an environmentally friendly flame-retardant packaging box and a preparation method thereof. Background Art

[0002] Gray board is an environmentally friendly material made from recycled waste paper. This material has a gray or gray-brown appearance, as well as high tensile strength and wear resistance. The main components of gray board are recycled waste paper and cellulose, which are recycled to form hardboard, which has the characteristics of being strong and durable. Its thickness and hardness can not only protect items from damage, but also give people a high-level enjoyment in terms of vision and touch. However, when encountering a fire, it is easy to burn and will affect its normal use, so how to avoid this phenomenon is the key to solving the problem. For example, patent CN112940511B is a silica gel packaging box and its preparation method. The invention has good antibacterial, tensile and anti-aging effects, but its flame retardant effect has not been improved. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly flame-retardant packaging box and a preparation method thereof, which has a good flame-retardant effect.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an environmentally friendly flame-retardant packaging box, comprising the following weight components: 60-90 weight parts of grey board paper, 5-8 weight parts of triazine-based flame retardant; the grey board paper comprises the following weight components: 40-70 weight parts of waste paper and 30-50 weight parts of cellulose.

[0007] Preferably, the preparation method of the flame retardant is:

[0008] (1) adding boric acid to a toluene solvent, stirring and dispersing, then adding sulfaguanidine thereto, heating to 110-125° C., reacting for 8-12 hours, and after the reaction is completed, performing reduced pressure distillation to modify sulfaguanidine with boric acid;

[0009] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, continue to add N-hydroxyethylpiperazine, react in a water bath at 0-2°C for 3-5h, stir mechanically to allow for full reaction, filter, wash and dry to obtain intermediate 1;

[0010] (3) adding 0.3-0.5 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, heating to 85-100° C. for reaction for 6-10 hours, centrifugally separating after completion, and washing with ethanol to obtain hydroxyl-modified triazine-based carbon nanotubes;

[0011] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, adding vinyltrichlorosilane thereto, heating to 80-110° C., reacting for 6-14 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0012] (5) Adding olefin-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester, irradiating with 365 nm ultraviolet light at 20-35° C. for 2-4 h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant.

[0013] Preferably, the mass ratio of boric acid to sulfaguanidine in (1) is 1:2.2-3.5.

[0014] Preferably, the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine in (2) is 1:0.01-0.03:2.6-3.8.

[0015] Preferably, the mass ratio of the hydroxylated carbon nanotubes to the intermediate 1 in (3) is 1.2-1.4:1.

[0016] Preferably, the mass ratio of hydroxyl-modified triazine-based carbon nanotubes, boric acid-modified sulfaguanidine, and vinyltrichlorosilane in (4) is 1.1-1.3:0.8-1.2:1.

[0017] Preferably, in (5), the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator, and methyl 3-mercaptopropionate is 1:0.02-0.03:1.1-1.5.

[0018] Preferably, the preparation method of the environmentally friendly flame-retardant packaging box is as follows: a special gray board paper is fixed, a die is cut according to the size of different products, a die-cutting and creasing machine is used to cut out the shape, a V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight, and an automatic oiling machine is used to wrap the side of the hidden gray board main material to make the side more beautiful and smooth, the box body material is formed, and finally the bevel cutting is performed, and then the lining is assembled and formed, and then a triazine-based flame retardant is sprayed on its surface, and it is dried for 2-3 hours to obtain an environmentally friendly flame-retardant packaging box.

[0019] (III) Beneficial technical effects

[0020] The present invention uses a fixed special grey board paper, cuts a die according to the size of different products, uses a die-cutting and creasing machine to cut out the shape, uses V-groove forming technology to ensure that the angle of the edge of the paper box is more straight, uses an automatic oiling machine to wrap the side of the hidden grey board main material to make the side more beautiful and smooth, forms the box body material, and finally performs bevel cutting, then assembles the liner into shape, and then sprays a triazine-based flame retardant on its surface and dries it to obtain an environmentally friendly flame-retardant packaging box.

[0021] The boron, silicon, nitrogen, sulfur, guanidine, triazine and carbon nanotubes contained in the triazine flame retardant all have good flame retardant effects and together constitute a flame retardant system. Boron melts at high temperatures to form a glassy covering layer that covers the surface of the burning material, which plays a role in isolating oxygen and heat, achieving a flame retardant effect. When silicon is heated, it can produce a glassy substance on the surface of the material to isolate material transportation and energy transfer. When nitrogen is heated, it can produce a flame-retardant gas, which can not only dilute the concentration of flammable gas, but also take away some heat, further limiting the combustion of the material. The sulfur contained therein can accelerate the carbonization effect of the material when it burns, and promote the formation of a dense carbon layer on the surface of the material. Among them, guanidine, triazine and carbon nanotubes themselves have good flame retardant effects; and hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine and vinyl trichlorosilane react to obtain olefin-modified triazine carbon nanotubes, which increases the degree of substitution of guanidine, triazine and carbon nanotubes, and further improves their flame retardant effects. At the same time, the gray board paper used in the packaging box is environmentally friendly. The main components of the gray board paper in the packaging box are recycled waste paper and cellulose. After recycling, it forms hard cardboard, which realizes the recycling of resources and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a product picture;

[0023] 101: Bevel. DETAILED DESCRIPTION

[0024] Example 1

[0025] (1) adding boric acid to a toluene solvent, stirring and dispersing, and then adding sulfaguanidine thereto, wherein the mass ratio of boric acid to sulfaguanidine is 1:2.2, heating to 110° C., reacting for 8 hours, and after the reaction is completed, performing reduced pressure distillation to modify sulfaguanidine with boric acid;

[0026] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, and continue to add N-hydroxyethylpiperazine, wherein the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine is 1:0.01:2.6, react in a water bath at 0°C for 3h, stir mechanically to fully react, filter, wash and dry after completion to obtain intermediate 1;

[0027] (3) adding 0.3 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 is 1.2:1, heating to 85° C. for reaction for 6 hours, centrifugally separating after completion, and washing with ethanol to obtain hydroxyl-modified triazine carbon nanotubes;

[0028] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, and then adding vinyl trichlorosilane thereto, wherein the mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine, and vinyl trichlorosilane is 1.1:0.8:1, heating to 80° C., reacting for 6 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0029] (5) adding alkenyl-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, and then adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester thereto, wherein the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester is 1:0.02:1.1, irradiating with 365nm ultraviolet light at 20°C for 2h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant;

[0030] (6) A special grey board paper with a fixed size of 60 parts by weight is cut into molds according to the size of different products. The shape is cut out with a die-cutting and creasing machine. The V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight. The side of the grey board main material is wrapped and hidden by an automatic oiling machine to make the side more beautiful and smooth. The box body material is formed and finally beveled and assembled. Then, 5 parts by weight of a triazine-based flame retardant is sprayed on its surface and dried for 2 hours to obtain an environmentally friendly flame-retardant packaging box. The grey board paper includes the following weight components: 40 parts by weight of waste paper and 30 parts by weight of cellulose.

[0031] Example 2

[0032] (1) adding boric acid to a toluene solvent, stirring and dispersing, and then adding sulfaguanidine thereto, wherein the mass ratio of boric acid to sulfaguanidine is 1:3.5, heating to 125° C., reacting for 12 hours, and after the reaction is completed, distilling under reduced pressure to modify sulfaguanidine with boric acid;

[0033] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, and continue to add N-hydroxyethylpiperazine, wherein the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine is 1:0.03:3.8, react in a water bath at 2° C. for 5 h, stir mechanically to allow for sufficient reaction, and filter, wash and dry to obtain intermediate 1 after completion;

[0034] (3) adding 0.5 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 is 1.4:1, heating to 100° C. for reaction for 10 hours, centrifugally separating after completion, and washing with ethanol to obtain hydroxyl-modified triazine-based carbon nanotubes;

[0035] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, and then adding vinyl trichlorosilane thereto, wherein the mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine, and vinyl trichlorosilane is 1.3:1.2:1, heating to 110° C., reacting for 14 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0036] (5) adding alkenyl-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, and then adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester thereto, wherein the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester is 1:0.03:1.5, irradiating with 365nm ultraviolet light at 35°C for 4h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant;

[0037] (6) A special grey board paper with a fixed size of 90 parts by weight is cut into molds according to the size of different products. The shape is cut out with a die-cutting and creasing machine. The V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight. The side of the grey board main material is wrapped and hidden by an automatic oiling machine to make the side more beautiful and smooth. The box body material is formed and finally beveled and assembled. Then, 8 parts by weight of a triazine-based flame retardant is sprayed on its surface and dried for 3 hours to obtain an environmentally friendly flame-retardant packaging box. The grey board paper includes the following weight components: 70 parts by weight of waste paper and 50 parts by weight of cellulose.

[0038] Example 3

[0039] (1) adding boric acid to a toluene solvent, stirring and dispersing, and then adding sulfaguanidine thereto, wherein the mass ratio of boric acid to sulfaguanidine is 1:2.8, heating to 116° C., reacting for 10 hours, and after the reaction is completed, performing reduced pressure distillation to modify sulfaguanidine with boric acid;

[0040] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, and continue to add N-hydroxyethylpiperazine, wherein the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine is 1:0.02:3.1, react in a water bath at 1°C for 4 hours, stir mechanically to allow for sufficient reaction, and filter, wash and dry to obtain intermediate 1 after completion;

[0041] (3) adding 0.4 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 is 1.3:1, heating to 92° C. for reaction for 8 hours, centrifuging after completion, and washing with ethanol to obtain hydroxyl-modified triazine carbon nanotubes;

[0042] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, and then adding vinyl trichlorosilane thereto, wherein the mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine, and vinyl trichlorosilane is 1.2:1.0:1, heating to 95° C., reacting for 10 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0043] (5) adding alkenyl-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, and then adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionate methyl ester thereto, wherein the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercaptopropionate is 1:0.025:1.3, irradiating with 365nm ultraviolet light at 30°C for 3h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant;

[0044] (6) A special grey board paper with a fixed weight of 75 parts by weight is cut into molds according to the sizes of different products. After cutting, a die-cutting and creasing machine is used to cut out the shape. A V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight. The side of the grey board main material is wrapped and hidden by an automatic oiling machine to make the side more beautiful and smooth. The box body material is formed and finally beveled and then the lining is assembled and formed. Then, 6.5 parts by weight of a triazine-based flame retardant is sprayed on its surface and dried for 2.5 hours to obtain an environmentally friendly flame-retardant packaging box. The grey board paper includes the following weight components: 55 parts by weight of waste paper and 40 parts by weight of cellulose.

[0045] Example 4

[0046] (1) adding boric acid to a toluene solvent, stirring and dispersing, and then adding sulfaguanidine thereto, wherein the mass ratio of boric acid to sulfaguanidine is 1:2.2, heating to 110° C., reacting for 8 hours, and after the reaction is completed, performing reduced pressure distillation to modify sulfaguanidine with boric acid;

[0047] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, and continue to add N-hydroxyethylpiperazine, wherein the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine is 1:0.01:2.6, react in a water bath at 0°C for 3h, stir mechanically to fully react, filter, wash and dry after completion to obtain intermediate 1;

[0048] (3) adding 0.5 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 is 1.4:1, heating to 100° C. for reaction for 10 hours, centrifugally separating after completion, and washing with ethanol to obtain hydroxyl-modified triazine-based carbon nanotubes;

[0049] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, and then adding vinyl trichlorosilane thereto, wherein the mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine, and vinyl trichlorosilane is 1.3:1.2:1, heating to 110° C., reacting for 14 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0050] (5) adding alkenyl-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, and then adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionate methyl ester thereto, wherein the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercaptopropionate is 1:0.025:1.3, irradiating with 365nm ultraviolet light at 30°C for 3h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant;

[0051] (6) A special grey board paper with a fixed size of 75 parts by weight is cut into molds according to the size of different products. After cutting, a die-cutting and creasing machine is used to cut out the shape. A V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight. The side of the grey board main material is wrapped and hidden by an automatic oiling machine to make the side more beautiful and smooth. The box body material is formed and finally beveled and assembled into an inner lining. Then, 6.5 parts by weight of a triazine-based flame retardant is sprayed on its surface and dried for 2.5 hours to obtain an environmentally friendly flame-retardant packaging box. The grey board paper includes the following weight components: 60 parts by weight of waste paper and 40 parts by weight of cellulose.

[0052] Example 5

[0053] (1) adding boric acid to a toluene solvent, stirring and dispersing, and then adding sulfaguanidine thereto, wherein the mass ratio of boric acid to sulfaguanidine is 1:3.5, heating to 125° C., reacting for 12 hours, and after the reaction is completed, distilling under reduced pressure to modify sulfaguanidine with boric acid;

[0054] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, and continue to add N-hydroxyethylpiperazine, wherein the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine is 1:0.03:3.8, react in a water bath at 2° C. for 5 h, stir mechanically to allow for sufficient reaction, and filter, wash and dry to obtain intermediate 1 after completion;

[0055] (3) adding 0.4 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 is 1.3:1, heating to 92° C. for reaction for 8 hours, centrifuging after completion, and washing with ethanol to obtain hydroxyl-modified triazine carbon nanotubes;

[0056] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, and then adding vinyl trichlorosilane thereto, wherein the mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine, and vinyl trichlorosilane is 1.2:1.0:1, heating to 95° C., reacting for 10 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0057] (5) adding alkenyl-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, and then adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester thereto, wherein the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester is 1:0.02:1.1, irradiating with 365nm ultraviolet light at 20°C for 2h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant;

[0058] (6) A special grey board paper with a fixed weight of 60 parts by weight is cut into molds according to the sizes of different products. After cutting, a die-cutting and creasing machine is used to cut out the shape. A V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight. The side of the grey board main material is wrapped and hidden by an automatic oiling machine to make the side more beautiful and smooth. The box body material is formed and finally beveled and then the lining is assembled and formed. Then, 5 parts by weight of a triazine-based flame retardant is sprayed on its surface and dried for 2 hours to obtain an environmentally friendly flame-retardant packaging box. The grey board paper includes the following weight components: 70 parts by weight of waste paper and 30 parts by weight of cellulose.

[0059] Example 6

[0060] (1) adding boric acid to a toluene solvent, stirring and dispersing, and then adding sulfaguanidine thereto, wherein the mass ratio of boric acid to sulfaguanidine is 1:2.8, heating to 116° C., reacting for 10 hours, and after the reaction is completed, performing reduced pressure distillation to modify sulfaguanidine with boric acid;

[0061] (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, and continue to add N-hydroxyethylpiperazine, wherein the mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine is 1:0.02:3.1, react in a water bath at 1°C for 4 hours, stir mechanically to allow for sufficient reaction, and filter, wash and dry to obtain intermediate 1 after completion;

[0062] (3) adding 0.3 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 is 1.2:1, heating to 85° C. for reaction for 6 hours, centrifugally separating after completion, and washing with ethanol to obtain hydroxyl-modified triazine carbon nanotubes;

[0063] (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, and then adding vinyl trichlorosilane thereto, wherein the mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfaguanidine, and vinyl trichlorosilane is 1.1:0.8:1, heating to 80° C., reacting for 6 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes;

[0064] (5) adding alkenyl-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, and then adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester thereto, wherein the mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester is 1:0.02:1.1, irradiating with 365nm ultraviolet light at 20°C for 2h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant;

[0065] (6) A special grey board paper with a fixed weight of 90 parts by weight is cut into molds according to the sizes of different products. The die is cut and shaped by a die-cutting and creasing machine. The V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight. The side of the grey board main material is wrapped and hidden by an automatic oiling machine to make the side more beautiful and smooth. The box body material is formed and finally beveled and assembled. Then, 8 parts by weight of a triazine-based flame retardant is sprayed on its surface and dried for 3 hours to obtain an environmentally friendly flame-retardant packaging box. The grey board paper includes the following weight components: 70 parts by weight of waste paper and 30 parts by weight of cellulose.

[0066] Comparative Example 1

[0067] Compared with Example 6, this comparative example does not add a triazine-based flame retardant.

[0068] Use an oxygen index meter to test the limiting oxygen index of environmentally friendly flame-retardant packaging boxes; use a horizontal and vertical combustion instrument to test the combustion level of environmentally friendly flame-retardant packaging boxes.

[0069] Table 1: Flame retardancy tests.

[0070] project Limiting oxygen index (%) Combustion level Example 1 31 V-0 Example 2 33 V-0 Example 3 32 V-0 Example 4 31 V-0 Example 5 33 V-0 Example 6 32 V-0 Comparative Example 1 21 V-1

[0071] It can be seen from Table 1 that the flame retardant effects of Examples 1-6 are better than those of Comparative Example 1, which indicates that the environmentally friendly flame retardant packaging box prepared by the present invention has good flame retardant effect.

[0072] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An environmentally friendly flame-retardant packaging box, characterized in that: The invention comprises the following components by weight: 60-90 parts by weight of grey board paper and 5-8 parts by weight of triazine-based flame retardant; the grey board paper comprises the following components by weight: 40-70 parts by weight of waste paper and 30-50 parts by weight of cellulose.

2. The environmentally friendly flame-retardant packaging box according to claim 1, characterized in that: The preparation method of the flame retardant is: (1) adding boric acid to a toluene solvent, stirring and dispersing, then adding sulfaguanidine thereto, heating to 110-125° C., reacting for 8-12 hours, and after the reaction is completed, performing reduced pressure distillation to modify sulfaguanidine with boric acid; (2) Add cyanuric chloride, triethylamine and acetone solvent into a reactor, stir evenly, continue to add N-hydroxyethylpiperazine, react in a water bath at 0-2°C for 3-5h, stir mechanically to allow for full reaction, filter, wash and dry to obtain intermediate 1; (3) adding 0.3-0.5 parts by weight of carbon nanotubes to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; adding hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, ultrasonically dispersing, and continuously adding intermediate 1 thereto, heating to 85-100° C. for reaction for 6-10 hours, centrifugally separating after completion, and washing with ethanol to obtain hydroxyl-modified triazine-based carbon nanotubes; (4) adding hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfaguanidine to N,N-dimethylformamide solvent, stirring and dispersing, adding vinyltrichlorosilane thereto, heating to 80-110° C., reacting for 6-14 hours, filtering, vacuum distilling the filtrate, washing with deionized water, and drying to obtain olefin-modified triazine carbon nanotubes; (5) Adding olefin-modified triazine-based carbon nanotubes to N,N-dimethylamide solvent, stirring and dispersing, adding benzoin dimethyl ether photoinitiator and 3-mercaptopropionic acid methyl ester, irradiating with 365 nm ultraviolet light at 20-35° C. for 2-4 h, centrifuging, and washing with deionized water to obtain a triazine-based flame retardant.

3. The environmentally friendly flame-retardant packaging box according to claim 2, characterized in that: The mass ratio of boric acid to sulfaguanidine in (1) is 1:2.2-3.

5.

4. The environmentally friendly flame-retardant packaging box according to claim 2, characterized in that: The mass ratio of cyanuric chloride, triethylamine and N-hydroxyethylpiperazine in (2) is 1:0.01-0.03:2.6-3.

8.

5. The environmentally friendly flame-retardant packaging box according to claim 2, characterized in that: The mass ratio of the hydroxylated carbon nanotubes to the intermediate 1 in (3) is 1.2-1.4:

1.

6. The environmentally friendly flame-retardant packaging box according to claim 2, characterized in that: The mass ratio of hydroxyl-modified triazine-based carbon nanotubes, boric acid-modified sulfaguanidine, and vinyltrichlorosilane in (4) is 1.1-1.3:0.8-1.2:

1.

7. The environmentally friendly flame-retardant packaging box according to claim 2, characterized in that: The mass ratio of alkenyl-modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator, and 3-mercaptopropionic acid methyl ester in (5) is 1:0.02-0.03:1.1-1.

5.

8. A method for preparing the environmentally friendly flame-retardant packaging box according to any one of claims 1 to 7, characterized in that: The preparation method of the environmentally friendly flame-retardant packaging box is as follows: a special grey board is fixed, a die is cut according to the size of different products, a die-cutting and creasing machine is used to cut out the shape, a V-groove forming technology is used to ensure that the angle of the edge of the paper box is more straight, an automatic oiling machine is used to oil the side of the hidden grey board main material to make the side more beautiful and smooth, the box body material is formed, and finally a bevel cutting is performed, and then the lining is assembled and formed, and then a triazine-based flame retardant is sprayed on its surface, and it is dried for 2-3 hours to obtain an environmentally friendly flame-retardant packaging box.

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