High-strength compression-resistant corrugated carton and preparation process thereof

Abstract

The invention relates to the technical field of corrugated paper, in particular to a high-strength compression-resistant corrugated carton and a preparation process thereof. In order to increase the strength of the corrugated case, a multi-layer composite structure is used, and the hardboard and the corrugated medium paper layer are compounded, so that the bearing strength of corrugated paper is improved, and the pressure resistance of the corrugated case is improved; in addition, a binder used for bonding different structural layers of the corrugated paper is modified, a bacteriostatic hydrophobic intermediate with antibacterial and hydrophobic functions is added and prepared in the binder, and chitosan and fluorine with a hydrophobic function are introduced in the bacteriostatic hydrophobic intermediate, so that the prepared pressure-sensitive adhesive has antibacterial and water-resistant properties, and is suitable for being applied to the field of corrugated paper. When the adhesive is used for bonding the corrugated paper, the antibacterial property and the water resistance of the corrugated paper can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated paper, in particular to a high-strength compression-resistant corrugated paper box and a preparation process thereof. Background Art

[0002] Corrugated cardboard is a lightweight, strong, shock-resistant and inexpensive packaging material. It is widely used in fruit and vegetable transportation, commodity packaging and other fields. However, due to the limitations of the corrugated paper itself, current corrugated cardboard boxes are generally not resistant to humid environments. In humid environments, their strength is severely reduced or even damaged. Therefore, it is necessary to improve the related defects of corrugated cardboard boxes. Summary of the invention

[0003] The object of the present invention is to provide a high-strength compression-resistant corrugated paper box and a preparation process thereof, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A high-strength compression-resistant corrugated paper box, having the following technical features: The high-strength compression-resistant corrugated paper box comprises a polygonal box body composed of high-strength corrugated paper;

[0005] The high-strength corrugated paper is composed of an upper cardboard layer, an upper corrugated core paper layer, a middle cardboard layer, a lower corrugated core paper layer and a lower cardboard layer from top to bottom;

[0006] Among them, the upper cardboard layer and the upper corrugated core paper layer, the upper corrugated core paper layer and the middle cardboard layer, the middle cardboard layer and the lower corrugated core paper layer, and the lower corrugated core paper layer and the lower cardboard layer are all bonded by antibacterial hydrophobic pressure-sensitive adhesive.

[0007] Furthermore, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0008] a. Disperse chitosan in acetic acid solution, stir to dissolve, and set aside;

[0009] Mix sorbitan oleate and ether, raise the temperature to 50-60°C, add chitosan acetic acid solution, continue stirring for 30-45 minutes, then drop propyne aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2-6 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0010] b. Disperse 4-(azidosulfonyl)benzoic acid in DMAc, protect under nitrogen atmosphere, heat to 65-80°C, disperse under ultrasonic vibration for 30-45min, add 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and diethyl pyrocarbonate, keep warm for 1.5-5h, cool to room temperature, add succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55-65°C, stir for 2-8h, and remove excess solvent by rotary evaporation to obtain an azido organosilicon intermediate;

[0011] c. Disperse the acetylenic modified chitosan in DMAc, protect under nitrogen atmosphere, heat to 55-65°C, stir and disperse for 15-30 minutes, add the azide organosilicon intermediate, continue to mix and disperse for 15-40 minutes, heat to 70-80°C, stir and react for 2-8 hours, and remove excess solvent by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0012] d. Under nitrogen atmosphere protection, all the hydroxytetradecyl methacrylate and all the antibacterial hydrophobic intermediates were mixed, stirred for 5-8 minutes, 1 / 2 of acetone and 1 / 2 of azobisisobutyronitrile were added, the temperature was raised to 65-70°C, stirred for reaction for 25-40 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0013] Add all the butyl acrylate and acrylamide to the acrylate prepolymer, stir and mix for 2-3 minutes, then add the remaining acetone and azobisisobutyronitrile, heat to 75-80°C, stir and polymerize for 2-4.5 hours, and cool to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive.

[0014] Furthermore, in step a, the chitosan has a deacetylation degree of 75-99.9%.

[0015] Furthermore, in step a, the mass ratio of sorbitan oleate, chitosan and propiolic aldehyde is (2-4):1.5:(0.2-0.8).

[0016] Furthermore, in step b, the mass ratio of 4-(azidosulfonyl)benzoic acid, 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and diethyl pyrocarbonate is 1:(1-1.45):(0.05-0.08).

[0017] Furthermore, in step b, the mass ratio of 4-(azidosulfonyl)benzoic acid to succinic acid mono-2-(2-acryloyloxy)hydroxyethanol is 1:(0.8-0.96).

[0018] Furthermore, in step c, the mass ratio of the acetylenic modified chitosan to the azide organosilicon intermediate is 1.5:

[0019] (0.1-0.3).

[0020] Furthermore, in step d, the antibacterial hydrophobic pressure-sensitive adhesive is prepared by reacting 20-30 parts of hydroxytetradecanoate methacrylate, 5-15 parts of an antibacterial hydrophobic intermediate, 15-20 parts of butyl acrylate, 5-12 parts of acrylamide, 1.5-2 parts of azobisisobutyronitrile and 80-120 parts of acetone.

[0021] Furthermore, a method for preparing a high-strength compression-resistant corrugated paper box comprises the following steps:

[0022] S1. Uniformly apply an antibacterial hydrophobic pressure-sensitive adhesive on the upper cardboard layer, the upper corrugated core paper layer, the middle cardboard layer, the lower corrugated core paper layer and the lower cardboard layer, and press and combine them, raise the temperature to 75-85°C, and dry for 3-6 hours to obtain high-strength corrugated paper;

[0023] S2. After cutting the edges of the high-strength corrugated paper, it is grooved, and the high-strength compression-resistant corrugated paper box is obtained by nailing and gluing.

[0024] Furthermore, in step S1, the coating amount of the antibacterial hydrophobic pressure-sensitive adhesive is 75-100 g / m 2 .

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] In order to increase the strength of the corrugated paper box, the present invention improves the corrugated paper, uses a multi-layer composite structure, and utilizes the composite of the cardboard and the corrugated core paper layer to improve the bearing strength of the corrugated paper and enhance the compressive strength of the corrugated paper box;

[0027] The present invention also modifies the adhesive used for bonding different structural layers of corrugated paper, and adds and prepares an antibacterial hydrophobic intermediate with antibacterial and hydrophobic function; the present invention first uses chitosan as a raw material, mixes it with propyle aldehyde, and the aldehyde group in the propyle aldehyde reacts with the amino group in the chitosan, thereby introducing an alkynyl structure into the chitosan; then on this basis, the present invention further uses 4-(azidosulfonyl)benzoic acid as a raw material, mixes it with 4,4'-bis(dimethylhydroxysilyl)diphenyl ether of terminal hydroxyl groups, utilizes the reaction between carboxyl groups and hydroxyl groups, thereby combining the azido group and hydroxyl groups on the same product, and then further uses succinic acid mono-2-(2-acryloyloxy)hydroxyethanol to react with it, and utilizes the carboxyl group contained in succinic acid mono-2-(2-acryloyloxy)hydroxyethanol to react with the hydroxyl group again, thereby finally preparing an azido silicone intermediate with an azido group and an acrylate group;

[0028] Afterwards, the azide silicone intermediate is mixed with the alkyne-modified chitosan, and the reaction between the alkyne group and the azide group is utilized to introduce hydrophobic silicon elements and acrylate groups into the chitosan. It is then cross-linked with the acrylate monomer so that the prepared pressure-sensitive adhesive has antibacterial and water-resistant properties. Using it to bond corrugated paper can effectively improve the antibacterial and water-resistant properties of the corrugated paper. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The cardboard material used in this application is 250g / m 2 The lower corrugated core paper is made of E-type fluted A2 grade boxboard with a gram weight of 200g / m 2 ; The degree of deacetylation of chitosan used in this application is 85-90%;

[0031] Embodiment 1. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0032] S1. Uniformly apply antibacterial hydrophobic pressure-sensitive adhesive on the upper cardboard layer, upper corrugated core paper layer, middle cardboard layer, lower corrugated core paper layer and lower cardboard layer, with a coating amount of 80g / m 2 After coating, press and combine, heat to 75℃, and dry for 4h to obtain high-strength corrugated paper;

[0033] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0034] a. Disperse 1.5 parts of chitosan by weight into acetic acid solution, stir to dissolve, and set aside;

[0035] Mix 2 parts of sorbitan oleate with 100 parts of ether, heat to 55°C, add chitosan acetic acid solution, continue stirring for 30 minutes, then drop 0.2 parts of propyle aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0036] b. Disperse 1 part of 4-(azidosulfonyl)benzoic acid in DMAc by weight, protect under nitrogen atmosphere, heat to 70°C, disperse under ultrasonic vibration for 45 minutes, add 1 part of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 0.05 part of diethyl pyrocarbonate, keep warm for 3 hours, cool to room temperature, add 0.8 part of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55°C, stir for 4 hours, and remove excess solvent by rotary evaporation to obtain an azido silicone intermediate;

[0037] c. According to the weight percentage, 1.5 parts of acetylenic modified chitosan were dispersed in DMAc, and the temperature was raised to 55°C under nitrogen atmosphere. After stirring and dispersing for 30 minutes, 0.1 parts of azide organosilicon intermediate were added, and the mixture was mixed and dispersed for 15 minutes. The temperature was raised to 70°C, and the reaction was stirred for 6 hours. The excess solvent was removed by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0038] d. Under nitrogen atmosphere protection, 25 parts of hydroxytetradecyl methacrylate and 5 parts of an antibacterial hydrophobic intermediate were mixed, stirred for 5 minutes, 40 parts of acetone and 1 part of azobisisobutyronitrile were added, the temperature was raised to 65°C, stirred for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0039] Add 15 parts of butyl acrylate and 8 parts of acrylamide to the acrylate prepolymer, stir and mix for 2 minutes, then add 40 parts of acetone and 1 part of azobisisobutyronitrile, heat to 80°C, stir and polymerize for 2 hours, and cool to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive;

[0040] S2. After cutting the edges of the high-strength corrugated paper, it is grooved, and the high-strength compression-resistant corrugated paper box is obtained by nailing and gluing.

[0041] Embodiment 2. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0042] Compared with Example 1, this embodiment increases the coating amount of the antibacterial hydrophobic pressure-sensitive adhesive in step S1;

[0043] S1. Uniformly apply antibacterial hydrophobic pressure-sensitive adhesive on the upper cardboard layer, upper corrugated core paper layer, middle cardboard layer, lower corrugated core paper layer and lower cardboard layer, with a coating amount of 100g / m 2 After coating, press and combine, heat to 75℃, and dry for 4h to obtain high-strength corrugated paper;

[0044] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0045] a. Disperse 1.5 parts of chitosan by weight into acetic acid solution, stir to dissolve, and set aside;

[0046] Mix 2 parts of sorbitan oleate with 100 parts of ether, heat to 55°C, add chitosan acetic acid solution, continue stirring for 30 minutes, then drop 0.2 parts of propyle aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0047] b. Disperse 1 part of 4-(azidosulfonyl)benzoic acid in DMAc by weight, protect under nitrogen atmosphere, heat to 70°C, disperse under ultrasonic vibration for 45 minutes, add 1 part of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 0.05 part of diethyl pyrocarbonate, keep warm for 3 hours, cool to room temperature, add 0.8 part of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55°C, stir for 4 hours, and remove excess solvent by rotary evaporation to obtain an azido silicone intermediate;

[0048] c. According to the weight percentage, 1.5 parts of acetylenic modified chitosan were dispersed in DMAc, and the temperature was raised to 55°C under nitrogen atmosphere. After stirring and dispersing for 30 minutes, 0.1 parts of azide organosilicon intermediate were added, and the mixture was mixed and dispersed for 15 minutes. The temperature was raised to 70°C, and the reaction was stirred for 6 hours. The excess solvent was removed by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0049] d. Under nitrogen atmosphere protection, 25 parts of hydroxytetradecyl methacrylate and 5 parts of an antibacterial hydrophobic intermediate were mixed, stirred for 5 minutes, 40 parts of acetone and 1 part of azobisisobutyronitrile were added, the temperature was raised to 65°C, stirred for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0050] Add 15 parts of butyl acrylate and 8 parts of acrylamide to the acrylate prepolymer, stir and mix for 2 minutes, then add 40 parts of acetone and 1 part of azobisisobutyronitrile, heat to 80°C, stir and polymerize for 2 hours, and cool to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive;

[0051] S2. After cutting the edges of the high-strength corrugated paper, it is grooved, and the high-strength compression-resistant corrugated paper box is obtained by nailing and gluing.

[0052] Embodiment 3. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0053] Compared with Example 1, this example increases the amount of antibacterial hydrophobic intermediate added in step d;

[0054] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0055] a. Disperse 1.5 parts of chitosan by weight into acetic acid solution, stir to dissolve, and set aside;

[0056] Mix 2 parts of sorbitan oleate with 100 parts of ether, heat to 55°C, add chitosan acetic acid solution, continue stirring for 30 minutes, then drop 0.2 parts of propyle aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0057] b. Disperse 1 part of 4-(azidosulfonyl)benzoic acid in DMAc by weight, protect under nitrogen atmosphere, heat to 70°C, disperse under ultrasonic vibration for 45 minutes, add 1 part of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 0.05 part of diethyl pyrocarbonate, keep warm for 3 hours, cool to room temperature, add 0.8 part of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55°C, stir for 4 hours, and remove excess solvent by rotary evaporation to obtain an azido silicone intermediate;

[0058] c. According to the weight percentage, 1.5 parts of acetylenic modified chitosan were dispersed in DMAc, and the temperature was raised to 55°C under nitrogen atmosphere. After stirring and dispersing for 30 minutes, 0.1 parts of azide organosilicon intermediate were added, and the mixture was mixed and dispersed for 15 minutes. The temperature was raised to 70°C, and the reaction was stirred for 6 hours. The excess solvent was removed by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0059] d. Under nitrogen atmosphere protection, 25 parts of hydroxytetradecyl methacrylate and 15 parts of an antibacterial hydrophobic intermediate were mixed, stirred for 5 minutes, 40 parts of acetone and 1 part of azobisisobutyronitrile were added, the temperature was raised to 65°C, stirred for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0060] 15 parts of butyl acrylate and 8 parts of acrylamide were added to the acrylate prepolymer, and the mixture was stirred for 2 minutes. Then, 40 parts of acetone and 1 part of azobisisobutyronitrile were added. The temperature was raised to 80° C., and the polymerization reaction was stirred for 2 hours. The mixture was cooled to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive.

[0061] Embodiment 4. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0062] Compared with Example 1, this example increases the amount of the azide organosilicon intermediate added in step c;

[0063] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0064] a. Disperse 1.5 parts of chitosan by weight into acetic acid solution, stir to dissolve, and set aside;

[0065] Mix 2 parts of sorbitan oleate with 100 parts of ether, heat to 55°C, add chitosan acetic acid solution, continue stirring for 30 minutes, then drop 0.2 parts of propyle aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0066] b. Disperse 1 part of 4-(azidosulfonyl)benzoic acid in DMAc by weight, protect under nitrogen atmosphere, heat to 70°C, disperse under ultrasonic vibration for 45 minutes, add 1 part of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 0.05 part of diethyl pyrocarbonate, keep warm for 3 hours, cool to room temperature, add 0.8 part of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55°C, stir for 4 hours, and remove excess solvent by rotary evaporation to obtain an azido silicone intermediate;

[0067] c. According to the weight percentage, 1.5 parts of acetylenic modified chitosan were dispersed in DMAc, protected by nitrogen atmosphere, heated to 55 ° C, stirred and dispersed for 30 minutes, and then 0.3 parts of azide organosilicon intermediate were added. After mixing and dispersing for 15 minutes, the temperature was raised to 70 ° C, stirred and reacted for 6 hours, and the excess solvent was removed by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0068] d. Under nitrogen atmosphere protection, 25 parts of hydroxytetradecyl methacrylate and 5 parts of an antibacterial hydrophobic intermediate were mixed, stirred for 5 minutes, 40 parts of acetone and 1 part of azobisisobutyronitrile were added, the temperature was raised to 65°C, stirred for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0069] 15 parts of butyl acrylate and 8 parts of acrylamide were added to the acrylate prepolymer, and the mixture was stirred for 2 minutes. Then, 40 parts of acetone and 1 part of azobisisobutyronitrile were added. The temperature was raised to 80° C., and the polymerization reaction was stirred for 2 hours. The mixture was cooled to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive.

[0070] Embodiment 5. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0071] Compared with Example 1, the amount of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether added in this example is increased;

[0072] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0073] a. Disperse 1.5 parts of chitosan by weight into acetic acid solution, stir to dissolve, and set aside;

[0074] Mix 2 parts of sorbitan oleate with 100 parts of ether, heat to 55°C, add chitosan acetic acid solution, continue stirring for 30 minutes, then drop 0.2 parts of propyle aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0075] b. Disperse 1 part of 4-(azidosulfonyl)benzoic acid in DMAc by weight, protect under nitrogen atmosphere, heat to 70°C, disperse under ultrasonic vibration for 45 minutes, add 1.45 parts of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 0.05 parts of diethyl pyrocarbonate, keep warm for 3 hours, cool to room temperature, add 0.8 parts of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55°C, stir for 4 hours, and remove excess solvent by rotary evaporation to obtain an azido organosilicon intermediate;

[0076] c. According to the weight percentage, 1.5 parts of acetylenic modified chitosan were dispersed in DMAc, and the temperature was raised to 55°C under nitrogen atmosphere. After stirring and dispersing for 30 minutes, 0.1 parts of azide organosilicon intermediate were added, and the mixture was mixed and dispersed for 15 minutes. The temperature was raised to 70°C, and the reaction was stirred for 6 hours. The excess solvent was removed by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0077] d. Under nitrogen atmosphere protection, 25 parts of hydroxytetradecyl methacrylate and 5 parts of an antibacterial hydrophobic intermediate were mixed, stirred for 5 minutes, 40 parts of acetone and 1 part of azobisisobutyronitrile were added, the temperature was raised to 65°C, stirred for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0078] 15 parts of butyl acrylate and 8 parts of acrylamide were added to the acrylate prepolymer, and the mixture was stirred for 2 minutes. Then, 40 parts of acetone and 1 part of azobisisobutyronitrile were added. The temperature was raised to 80° C., and the polymerization reaction was stirred for 2 hours. The mixture was cooled to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive.

[0079] Embodiment 6. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0080] Compared with Example 1, the amount of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol added in step b is increased in this example;

[0081] S1. Uniformly apply antibacterial hydrophobic pressure-sensitive adhesive on the upper cardboard layer, upper corrugated core paper layer, middle cardboard layer, lower corrugated core paper layer and lower cardboard layer, with a coating amount of 80g / m 2 After coating, press and combine, heat to 75℃, and dry for 4h to obtain high-strength corrugated paper;

[0082] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0083] a. Disperse 1.5 parts of chitosan by weight into acetic acid solution, stir to dissolve, and set aside;

[0084] Mix 2 parts of sorbitan oleate with 100 parts of ether, heat to 55°C, add chitosan acetic acid solution, continue stirring for 30 minutes, then drop 0.2 parts of propyle aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan;

[0085] b. Disperse 1 part of 4-(azidosulfonyl)benzoic acid in DMAc by weight, protect under nitrogen atmosphere, heat to 70°C, disperse under ultrasonic vibration for 45 minutes, add 1 part of 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and 0.05 parts of diethyl pyrocarbonate, keep warm for 3 hours, cool to room temperature, add 0.96 parts of succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55°C, stir for 4 hours, and remove excess solvent by rotary evaporation to obtain an azido silicone intermediate;

[0086] c. According to the weight percentage, 1.5 parts of acetylenic modified chitosan were dispersed in DMAc, and the temperature was raised to 55°C under nitrogen atmosphere. After stirring and dispersing for 30 minutes, 0.1 parts of azide organosilicon intermediate were added, and the mixture was mixed and dispersed for 15 minutes. The temperature was raised to 70°C, and the reaction was stirred for 6 hours. The excess solvent was removed by rotary evaporation to obtain an antibacterial hydrophobic intermediate;

[0087] d. Under nitrogen atmosphere protection, 25 parts of hydroxytetradecyl methacrylate and 5 parts of an antibacterial hydrophobic intermediate were mixed, stirred for 5 minutes, 40 parts of acetone and 1 part of azobisisobutyronitrile were added, the temperature was raised to 65°C, stirred for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0088] Add 15 parts of butyl acrylate and 8 parts of acrylamide to the acrylate prepolymer, stir and mix for 2 minutes, then add 40 parts of acetone and 1 part of azobisisobutyronitrile, heat to 80°C, stir and polymerize for 2 hours, and cool to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive;

[0089] S2. After cutting the edges of the high-strength corrugated paper, it is grooved, and the high-strength compression-resistant corrugated paper box is obtained by nailing and gluing.

[0090] Comparative Example 1. A method for preparing a high-strength compression-resistant corrugated paper box, comprising the following steps:

[0091] Compared with Example 1, no antibacterial hydrophobic intermediate was prepared in this comparative example;

[0092] S1. Uniformly apply antibacterial hydrophobic pressure-sensitive adhesive on the upper cardboard layer, upper corrugated core paper layer, middle cardboard layer, lower corrugated core paper layer and lower cardboard layer, with a coating amount of 80g / m 2 After coating, press and combine, heat to 75℃, and dry for 4h to obtain high-strength corrugated paper;

[0093] Wherein, the preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is:

[0094] Under nitrogen atmosphere protection, 25 parts of hydroxytetradecanoate methacrylate, 40 parts of acetone and 1 part of azobisisobutyronitrile were mixed, the temperature was raised to 65°C, stirred for reaction for 25 minutes, and then cooled to room temperature to obtain an acrylate prepolymer;

[0095] Add 15 parts of butyl acrylate and 8 parts of acrylamide to the acrylate prepolymer, stir and mix for 2 minutes, then add 40 parts of acetone and 1 part of azobisisobutyronitrile, heat to 80°C, stir and polymerize for 2 hours, and cool to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive;

[0096] S2. After cutting the edges of the high-strength corrugated paper, it is grooved, and the high-strength compression-resistant corrugated paper box is obtained by nailing and gluing.

[0097] Test: Corrugated paper samples were prepared according to the preparation methods of Examples 1-6 and Comparative Example 1, and the edge compression strength of the corrugated paper samples prepared in Examples 1-6 and Comparative Example 1 was tested according to GB / T 16717; the bursting strength of the corrugated paper samples prepared in Examples 1-6 and Comparative Example 1 was tested according to GB / T 6544-2008; the puncture strength of the corrugated paper samples prepared in Examples 1-6 and Comparative Example 1 was tested according to GB / T 6544-2008;

[0098] According to the antibacterial ring method, the corrugated paper samples prepared in Examples 1-6 and Comparative Example 1 were cut into 12 mm diameter discs, respectively placed in agar medium inoculated with Escherichia coli and Staphylococcus aureus, and cultured at 37°C for 24 hours, and then the antibacterial ring diameters were measured;

[0099] The corrugated paper samples prepared in Examples 1-6 and Comparative Example 1 were placed in an environment with an air temperature of 30° C. and a humidity of 98-100%. After being placed for 72 hours, their edge compression strength was tested. The test results are shown in the following table.

[0100]

[0101]

[0102] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-strength compression-resistant corrugated paper box, characterized in that: The high-strength compression-resistant corrugated paper box comprises a polygonal box body composed of high-strength corrugated paper; The high-strength corrugated paper is composed of an upper cardboard layer, an upper corrugated core paper layer, a middle cardboard layer, a lower corrugated core paper layer and a lower cardboard layer from top to bottom; Among them, the upper cardboard layer and the upper corrugated core paper layer, the upper corrugated core paper layer and the middle cardboard layer, the middle cardboard layer and the lower corrugated core paper layer, and the lower corrugated core paper layer and the lower cardboard layer are all bonded by antibacterial hydrophobic pressure-sensitive adhesive.

2. A high-strength compression-resistant corrugated paper box according to claim 1, characterized in that: The preparation method of the antibacterial hydrophobic pressure-sensitive adhesive is as follows: a. Disperse chitosan in acetic acid solution, stir to dissolve, and set aside; Mix sorbitan oleate and ether, raise the temperature to 50-60°C, add chitosan acetic acid solution, continue stirring for 30-45 minutes, then drop propyne aldehyde into the mixture, stir continuously during the dropwise addition, keep warm for 2-6 hours, and remove excess solvent by rotary evaporation to obtain alkynyl-modified chitosan; b. Disperse 4-(azidosulfonyl)benzoic acid in DMAc, protect under nitrogen atmosphere, heat to 65-80°C, disperse under ultrasonic vibration for 30-45min, add 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and diethyl pyrocarbonate, keep warm for 1.5-5h, cool to room temperature, add succinic acid mono-2-(2-acryloyloxy)hydroxyethanol, heat to 55-65°C, stir for 2-8h, and remove excess solvent by rotary evaporation to obtain an azido organosilicon intermediate; c. Disperse the acetylenic modified chitosan in DMAc, protect under nitrogen atmosphere, heat to 55-65°C, stir and disperse for 15-30 minutes, add the azide organosilicon intermediate, continue to mix and disperse for 15-40 minutes, heat to 70-80°C, stir and react for 2-8 hours, and remove excess solvent by rotary evaporation to obtain an antibacterial hydrophobic intermediate; d. Under nitrogen atmosphere protection, all the hydroxytetradecyl methacrylate and all the antibacterial hydrophobic intermediates were mixed, stirred for 5-8 minutes, 1 / 2 of acetone and 1 / 2 of azobisisobutyronitrile were added, the temperature was raised to 65-70°C, stirred for reaction for 25-40 minutes, and then cooled to room temperature to obtain an acrylate prepolymer; Add all the butyl acrylate and acrylamide to the acrylate prepolymer, stir and mix for 2-3 minutes, then add the remaining acetone and azobisisobutyronitrile, heat to 75-80°C, stir and polymerize for 2-4.5 hours, and cool to room temperature to obtain an antibacterial hydrophobic pressure-sensitive adhesive.

3. A high-strength compression-resistant corrugated paper box according to claim 2, characterized in that: In step a, the chitosan has a deacetylation degree of 75-99.9%.

4. The high-strength compression-resistant corrugated paper box according to claim 2, characterized in that: In step a, the mass ratio of sorbitan oleate, chitosan and propiolic aldehyde is (2-4):1.5:(0.2-0.8).

5. The high-strength compression-resistant corrugated paper box according to claim 2, characterized in that: In step b, the mass ratio of 4-(azidosulfonyl)benzoic acid, 4,4'-bis(dimethylhydroxysilyl)diphenyl ether and diethyl pyrocarbonate is 1:(1-1.45):(0.05-0.08).

6. The high-strength compression-resistant corrugated paper box according to claim 2, characterized in that: In step b, the mass ratio of 4-(azidosulfonyl)benzoic acid to succinic acid mono-2-(2-acryloyloxy)hydroxyethanol is 1:(0.8-0.96).

7. The high-strength compression-resistant corrugated paper box according to claim 2, characterized in that: In step c, the mass ratio of the alkynyl-modified chitosan to the azide organosilicon intermediate is 1.5:(0.1-0.3).

8. The high-strength compression-resistant corrugated paper box according to claim 2, characterized in that: In step d, the antibacterial hydrophobic pressure-sensitive adhesive is prepared by reacting 20-30 parts of hydroxytetradecanoate methacrylate, 5-15 parts of an antibacterial hydrophobic intermediate, 15-20 parts of butyl acrylate, 5-12 parts of acrylamide, 1.5-2 parts of azobisisobutyronitrile and 80-120 parts of acetone.

9. A method for preparing a high-strength compression-resistant corrugated paper box according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Uniformly apply an antibacterial hydrophobic pressure-sensitive adhesive on the upper cardboard layer, the upper corrugated core paper layer, the middle cardboard layer, the lower corrugated core paper layer and the lower cardboard layer, and press and combine them, raise the temperature to 75-85°C, and dry for 3-6 hours to obtain high-strength corrugated paper; S2. After cutting the edges of the high-strength corrugated paper, it is grooved, and the high-strength compression-resistant corrugated paper box is obtained by nailing and gluing.

10. The method for preparing a high-strength compression-resistant corrugated paper box according to claim 9, characterized in that: In step S1, the coating amount of the antibacterial hydrophobic pressure-sensitive adhesive is 75-100 g / m 2 .

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