An environmentally friendly flame-retardant packaging box and its preparation method

Abstract

This invention relates to the field of polymer materials technology and discloses an environmentally friendly flame-retardant packaging box and its preparation method. The invention uses a special grey board paper as the template, and cuts a die according to the size of different products. After cutting, a die-cutting and creasing machine is used to cut the shape. V-groove forming technology ensures that the edges of the box are more straight and right-angled. An automatic edge-oiling machine is used to wrap and hide the sides of the grey board material, making the sides more aesthetically pleasing and flat. After the box body is formed, it is beveled and then the inner lining is assembled. Finally, a triazine-based flame retardant is sprayed onto the surface and dried to obtain the environmentally friendly flame-retardant packaging box. The triazine-based flame retardant contains boron, silicon, nitrogen, sulfur, guanidine, triazine, and carbon nanotubes, all of which have good flame-retardant effects and together constitute a flame-retardant system. At the same time, the grey board paper used in the packaging box has good environmental friendliness.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to an environmentally friendly flame-retardant packaging box and its preparation method. Background Technology

[0002] Grey cardboard is an environmentally friendly material made from recycled waste paper. This material has a grey or greyish-brown appearance and high tensile strength and abrasion resistance. The main components of grey cardboard are recycled waste paper and cellulose, which, after recycling, form rigid cardboard with strong and durable properties. Its thickness and hardness not only protect items from damage but also provide a premium visual and tactile experience. However, its flammability in a fire can affect its normal use; therefore, avoiding this flammability is key to solving the problem. For example, patent CN112940511B describes a silicone packaging box and its preparation method. This invention has good antibacterial, tensile, and anti-aging effects, but its flame-retardant effect is not improved. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides an environmentally friendly flame-retardant packaging box and its preparation method, which has a good flame-retardant effect.

[0005] (II) Technical Solution

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

[0007] Preferably, the flame retardant is prepared by:

[0008] (1) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, heat to 110-125℃, react for 8-12h, after the reaction is completed, distill under reduced pressure, and sulfanilamide guanidine modified with boric acid;

[0009] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor, stir evenly, continue to add N-hydroxyethylpiperazine, react in a water bath at 0-2℃ for 3-5h, mechanically stir to make the reaction complete, filter, wash and dry to obtain intermediate 1.

[0010] (3) Add 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; add hydroxylated carbon nanotubes to N,N-dimethylformamide solvent, disperse by ultrasonication, continue to add intermediate 1, heat to 85-100℃ and react for 6-10 h, centrifuge after the reaction, wash with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0011] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide guanidine were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added. The temperature was raised to 80-110℃ and the reaction was carried out for 6-14 hours. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0012] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, irradiate with 365nm ultraviolet light at 20-35℃ for 2-4h, centrifuge, wash with deionized water to obtain triazine flame retardant.

[0013] Preferably, the mass ratio of boric acid to sulfanilamide 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 hydroxylated carbon nanotubes to intermediate 1 in (3) is 1.2-1.4:1.

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

[0017] Preferably, the mass ratio of alkenyl modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator, and methyl 3-mercaptopropionate in (5) 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 used as the template, and a die-cutting mold is made according to the size of different products. After the die-cutting is completed, the shape is cut out using a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the paper box edge is straighter. An automatic edge-oiling machine is used to wrap and hide the side of the gray board main material, making the side more beautiful and flat. The box body material is formed, and finally, the beveled edge is cut. Then, the inner lining is assembled and formed. Then, a triazine-based flame retardant is sprayed on its surface and dried for 2-3 hours to obtain the environmentally friendly flame-retardant packaging box.

[0019] (III) Beneficial Technical Effects

[0020] This invention uses a special grey board paper as the template. According to the size of different products, a die-cutting and creasing machine is used to cut out the shape. V-groove forming technology is used to ensure that the right angle of the paper box edge is straighter. An automatic edge-oiling machine is used to wrap and hide the side of the grey board material, making the side more beautiful and flat. After the box material is formed, the beveled edge is cut. Then the inner lining is assembled and formed. Finally, a triazine-based flame retardant is sprayed on the surface and dried to obtain an environmentally friendly flame-retardant packaging box.

[0021] The triazine-based flame retardant contains boron, silicon, nitrogen, sulfur, guanidine, triazine, and carbon nanotubes, all of which possess good flame-retardant properties and together constitute the flame-retardant system. Boron melts at high temperatures, forming a glassy coating that covers the surface of the burning material, isolating it from oxygen and heat, thus achieving a flame-retardant effect. Silicon, when heated, produces a glassy substance on the material surface, isolating material transport and energy transfer. Nitrogen, when heated, produces a flame-retardant gas, which not only dilutes the concentration of flammable gases but also carries away some heat, further limiting combustion. The sulfur it contains accelerates char formation during combustion, promoting the formation of a dense carbon layer on the material surface. Guanidine, triazine, and carbon nanotubes themselves possess good flame-retardant properties; furthermore, the reaction of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide guanidine, and vinyltrichlorosilane yields alkenyl-modified triazine carbon nanotubes, increasing the substitution degree of guanidine, triazine, and carbon nanotubes, further enhancing their flame-retardant effect. Meanwhile, the grey board paper used in the packaging box has good environmental protection properties. The main components of the grey board paper in the packaging box are recycled waste paper and cellulose. After recycling, it forms rigid cardboard, realizing the recycling of resources and having good application prospects. Attached Figure Description

[0022] Figure 1 It's a product image;

[0023] 101: Hypotenuse. Detailed Implementation

[0024] Example 1

[0025] (1) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, wherein the mass ratio of boric acid to sulfanilamide guanidine is 1:2.2, heat to 110℃, react for 8 hours, after the reaction is completed, distill under reduced pressure to modify sulfanilamide guanidine with boric acid;

[0026] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor and stir evenly. 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 3 hours. Stir mechanically to ensure that the reaction is complete. After the reaction is complete, filter, wash and dry to obtain intermediate 1.

[0027] (3) 0.3 parts by weight of carbon nanotubes were added to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; hydroxylated carbon nanotubes were added to N,N-dimethylformamide solvent and ultrasonically dispersed; intermediate 1 was added to it, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 was 1.2:1; the temperature was raised to 85℃ and reacted for 6 hours; after the reaction was completed, the mixture was centrifuged and washed with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0028] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added to it. The mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide, and vinyltrichlorosilane was 1.1:0.8:1. The temperature was raised to 80℃ and the reaction was carried out for 6 hours. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0029] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, wherein the mass ratio of alkenyl-modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate is 1:0.02:1.1, irradiate with 365nm ultraviolet light at 20℃ for 2h, centrifuge, wash with deionized water to obtain triazine flame retardant;

[0030] (6) 60 parts by weight of special grey board paper are used to make a die-cutting mold according to the size of different products. After the die-cutting is completed, the shape is cut out by a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the paper box edge is straighter. The side of the grey board material is wrapped and hidden by an automatic edge-oiling machine to make the side more beautiful and flat. The box material is formed and then the bevel is cut. The inner lining is then assembled and formed. Then, 5 parts by weight of triazine flame retardant is sprayed on the 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) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, wherein the mass ratio of boric acid to sulfanilamide guanidine is 1:3.5, heat to 125℃, react for 12h, after the reaction is completed, distill under reduced pressure to modify sulfanilamide guanidine with boric acid;

[0033] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor and stir evenly. 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 hours. Stir mechanically to ensure that the reaction is complete. After the reaction is complete, filter, wash and dry to obtain intermediate 1.

[0034] (3) 0.5 parts by weight of carbon nanotubes were added to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; hydroxylated carbon nanotubes were added to N,N-dimethylformamide solvent and ultrasonically dispersed; intermediate 1 was added to it, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 was 1.4:1; the temperature was raised to 100℃ and reacted for 10 h; after the reaction was completed, the mixture was centrifuged and washed with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0035] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added to it. The mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide, and vinyltrichlorosilane was 1.3:1.2:1. The temperature was raised to 110℃ and the reaction was carried out for 14 h. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0036] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, wherein the mass ratio of alkenyl-modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate is 1:0.03:1.5. Irradiate with 365nm ultraviolet light at 35℃ for 4h, centrifuge, wash with deionized water to obtain triazine flame retardant;

[0037] (6) 90 parts by weight of special grey board paper are used to make a die-cutting mold according to the size of different products. After the die-cutting is completed, the shape is cut out by a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the paper box edge is straighter. An automatic edge-oiling machine is used to wrap and hide the side of the grey board material, making the side more beautiful and flat. The box material is formed and then the bevel is cut. The inner lining is then assembled and formed. Then, 8 parts by weight of triazine flame retardant is sprayed on the 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) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, wherein the mass ratio of boric acid to sulfanilamide guanidine is 1:2.8, heat to 116℃, react for 10h, after the reaction is completed, distill under reduced pressure to modify sulfanilamide guanidine with boric acid;

[0040] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor and stir evenly. 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 ensure that the reaction is complete. After the reaction is complete, filter, wash and dry to obtain intermediate 1.

[0041] (3) 0.4 parts by weight of carbon nanotubes were added to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; hydroxylated carbon nanotubes were added to N,N-dimethylformamide solvent and ultrasonically dispersed; intermediate 1 was added to it, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 was 1.3:1; the temperature was raised to 92℃ and reacted for 8 hours; after the reaction was completed, the mixture was centrifuged and washed with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0042] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added to it. The mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide, and vinyltrichlorosilane was 1.2:1.0:1. The temperature was raised to 95℃ and the reaction was carried out for 10 h. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0043] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, wherein the mass ratio of alkenyl-modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate is 1:0.025:1.3. Irradiate with 365nm ultraviolet light at 30℃ for 3h, centrifuge, wash with deionized water to obtain triazine flame retardant;

[0044] (6) 75 parts by weight of special grey board paper are used to make a die-cutting mold according to the size of different products. After the die-cutting is completed, the shape is cut out by a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the edge of the paper box is straighter. The side of the grey board material is wrapped and hidden by an automatic edge-oiling machine to make the side more beautiful and flat. The box material is formed and then beveled. The inner lining is then assembled and formed. Then, 6.5 parts by weight of triazine flame retardant is sprayed on the 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) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, wherein the mass ratio of boric acid to sulfanilamide guanidine is 1:2.2, heat to 110℃, react for 8 hours, after the reaction is completed, distill under reduced pressure to modify sulfanilamide guanidine with boric acid;

[0047] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor and stir evenly. 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 3 hours. Stir mechanically to ensure that the reaction is complete. After the reaction is complete, filter, wash and dry to obtain intermediate 1.

[0048] (3) 0.5 parts by weight of carbon nanotubes were added to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; hydroxylated carbon nanotubes were added to N,N-dimethylformamide solvent and ultrasonically dispersed; intermediate 1 was added to it, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 was 1.4:1; the temperature was raised to 100℃ and reacted for 10 h; after the reaction was completed, the mixture was centrifuged and washed with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0049] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added to it. The mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide, and vinyltrichlorosilane was 1.3:1.2:1. The temperature was raised to 110℃ and the reaction was carried out for 14 h. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0050] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, wherein the mass ratio of alkenyl-modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate is 1:0.025:1.3. Irradiate with 365nm ultraviolet light at 30℃ for 3h, centrifuge, wash with deionized water to obtain triazine flame retardant;

[0051] (6) 75 parts by weight of special grey board paper are used to make a die-cutting mold according to the size of different products. After the die-cutting is completed, the shape is cut out by a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the edge of the paper box is straighter. The side of the grey board material is wrapped and hidden by an automatic edge-oiling machine to make the side more beautiful and flat. The box material is formed and then the bevel is cut. The inner lining is then assembled and formed. Then, 6.5 parts by weight of triazine flame retardant is sprayed on the 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) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, wherein the mass ratio of boric acid to sulfanilamide guanidine is 1:3.5, heat to 125℃, react for 12h, after the reaction is completed, distill under reduced pressure to modify sulfanilamide guanidine with boric acid;

[0054] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor and stir evenly. 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 hours. Stir mechanically to ensure that the reaction is complete. After the reaction is complete, filter, wash and dry to obtain intermediate 1.

[0055] (3) 0.4 parts by weight of carbon nanotubes were added to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; hydroxylated carbon nanotubes were added to N,N-dimethylformamide solvent and ultrasonically dispersed; intermediate 1 was added to it, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 was 1.3:1; the temperature was raised to 92℃ and reacted for 8 hours; after the reaction was completed, the mixture was centrifuged and washed with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0056] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added to it. The mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide, and vinyltrichlorosilane was 1.2:1.0:1. The temperature was raised to 95℃ and the reaction was carried out for 10 h. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0057] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, wherein the mass ratio of alkenyl-modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate is 1:0.02:1.1, irradiate with 365nm ultraviolet light at 20℃ for 2h, centrifuge, wash with deionized water to obtain triazine flame retardant;

[0058] (6) 60 parts by weight of special grey board paper are used to make a die-cutting mold according to the size of different products. After the die-cutting is completed, the shape is cut out by a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the paper box edge is straighter. The side of the grey board material is wrapped and hidden by an automatic edge-oiling machine to make the side more beautiful and flat. The box material is formed and then the bevel is cut. The inner lining is then assembled and formed. Then, 5 parts by weight of triazine flame retardant is sprayed on the 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) Add boric acid to toluene solvent, stir and disperse, then add sulfanilamide guanidine, wherein the mass ratio of boric acid to sulfanilamide guanidine is 1:2.8, heat to 116℃, react for 10h, after the reaction is completed, distill under reduced pressure to modify sulfanilamide guanidine with boric acid;

[0061] (2) Add cyanuric chloride, triethylamine and acetone solvent to the reactor and stir evenly. 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 ensure that the reaction is complete. After the reaction is complete, filter, wash and dry to obtain intermediate 1.

[0062] (3) 0.3 parts by weight of carbon nanotubes were added to concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1 for acidification to obtain hydroxylated carbon nanotubes; hydroxylated carbon nanotubes were added to N,N-dimethylformamide solvent and ultrasonically dispersed; intermediate 1 was added to it, wherein the mass ratio of hydroxylated carbon nanotubes to intermediate 1 was 1.2:1; the temperature was raised to 85℃ and reacted for 6 hours; after the reaction was completed, the mixture was centrifuged and washed with ethanol to obtain hydroxylated triazine carbon nanotubes;

[0063] (4) Hydroxyl-modified triazine carbon nanotubes and boric acid-modified sulfanilamide were added to N,N-dimethylformamide solvent, stirred and dispersed, and then vinyltrichlorosilane was added to it. The mass ratio of hydroxyl-modified triazine carbon nanotubes, boric acid-modified sulfanilamide, and vinyltrichlorosilane was 1.1:0.8:1. The temperature was raised to 80℃ and the reaction was carried out for 6 hours. The mixture was filtered, the filtrate was distilled under reduced pressure, washed with deionized water, and dried to obtain alkenyl-modified triazine carbon nanotubes.

[0064] (5) Add the alkenyl-modified triazine carbon nanotubes to N,N-dimethylamide solvent, stir and disperse, then add benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate, wherein the mass ratio of alkenyl-modified triazine carbon nanotubes, benzoin dimethyl ether photoinitiator and methyl 3-mercaptopropionate is 1:0.02:1.1, irradiate with 365nm ultraviolet light at 20℃ for 2h, centrifuge, wash with deionized water to obtain triazine flame retardant;

[0065] (6) 90 parts by weight of special grey board paper are used to make a die-cutting mold according to the size of different products. After the die-cutting is completed, the shape is cut out by a die-cutting and creasing machine. V-groove forming technology is used to ensure that the right angle of the paper box edge is straighter. An automatic edge-oiling machine is used to wrap and hide the side of the grey board material, making the side more beautiful and flat. The box material is formed, and finally the bevel is cut. Then the inner lining is assembled and formed. Then, 8 parts by weight of triazine 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 to Example 6, no triazine flame retardant was added to this comparative example.

[0068] The limiting oxygen index of the environmentally friendly flame-retardant packaging box was tested using an oxygen index meter; the flammability rating of the environmentally friendly flame-retardant packaging box was tested using a horizontal and vertical burner.

[0069] Table 1: Flame retardancy test.

[0070] project Limiting oxygen index (%) flammability rating 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] As shown in Table 1, Examples 1-6 have better flame retardant effects than Comparative Example 1, indicating 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 merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The 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 method comprises the following steps: 60-90 parts by weight of grey board paper, 5-8 parts by weight of triazine-based flame retardant; the grey board paper comprises the following components: 40-70 parts by weight of waste paper and 30-50 parts by weight of cellulose; The preparation method of the triazine-based flame retardant is as follows: (1) boric acid is added into toluene solvent, stirred and dispersed, then sulfanilamide guanidine is added, heated to 110-125 DEG C, reacted for 8-12 hours, after the reaction, vacuum distillation, boric acid modified sulfanilamide guanidine is obtained; (2) cyanuric chloride, triethylamine and acetone solvent are added into a reactor, stirred uniformly, then N-hydroxyethyl piperazine is added, reacted for 3-5 hours in a water bath at 0-2 DEG C, fully reacted by mechanical stirring, after the reaction, filtered, washed, dried, and an intermediate 1 is obtained; (3) 0.3-0.5 parts by weight of carbon nanotubes are added into concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1 for acidification, and hydroxylated carbon nanotubes are obtained; the hydroxylated carbon nanotubes are added into N,N-dimethylformamide solvent, ultrasonic dispersed, then the intermediate 1 is added, heated to 85-100 DEG C, reacted for 6-10 hours, after the reaction, centrifuged, washed with ethanol, and hydroxyl modified triazine-based carbon nanotubes are obtained; (4) the hydroxyl modified triazine-based carbon nanotubes and boric acid modified sulfanilamide guanidine are added into N,N-dimethylformamide solvent, stirred and dispersed, then vinyltrichlorosilane is added, heated to 80-110 DEG C, reacted for 6-14 hours, filtered, the filtrate is vacuum distilled, washed with deionized water, and dried, and alkenyl modified triazine-based carbon nanotubes are obtained; (5) the alkenyl modified triazine-based carbon nanotubes are added into N,N-dimethylformamide solvent, stirred and dispersed, then benzoin dimethyl ether photoinitiator and 3-mercapto propionic acid methyl ester are added, irradiated with 365 nm ultraviolet light for 2-4 hours at 20-35 DEG C, centrifuged, washed with deionized water, and the triazine-based flame retardant is obtained; The mass ratio of boric acid and sulfanilamide guanidine in (1) is 1:2.2-3.5; The mass ratio of cyanuric chloride, triethylamine and N-hydroxyethyl piperazine in (2) is 1:0.01-0.03:2.6-3.8; The mass ratio of hydroxylated carbon nanotubes and the intermediate 1 in (3) is 1.2-1.4:1; The mass ratio of hydroxyl modified triazine-based carbon nanotubes, boric acid modified sulfanilamide guanidine and vinyltrichlorosilane in (4) is 1.1-1.3:0.8-1.2:1; The mass ratio of alkenyl modified triazine-based carbon nanotubes, benzoin dimethyl ether photoinitiator and 3-mercapto propionic acid methyl ester in (5) is 1:0.02-0.03:1.1-1.5.

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