CN114108386A - Preparation process of environment-friendly waterproof corrugated carton - Google Patents
Preparation process of environment-friendly waterproof corrugated carton Download PDFInfo
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- CN114108386A CN114108386A CN202111465143.6A CN202111465143A CN114108386A CN 114108386 A CN114108386 A CN 114108386A CN 202111465143 A CN202111465143 A CN 202111465143A CN 114108386 A CN114108386 A CN 114108386A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
- B31F5/04—Attaching together sheets, strips or webs; Reinforcing edges by exclusive use of adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/08—Corrugated paper or cardboard
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/28—Di-epoxy compounds containing acyclic nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/25—Cellulose
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/26—All layers being made of paper or paperboard
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2170/00—Compositions for adhesives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention provides a preparation process of an environment-friendly waterproof corrugated carton, belonging to the field of packaging materials and comprising the following steps: the method comprises the steps of pulping by taking recycled waste paper as a raw material, carrying out coprecipitation on amino cellulose and paper pulp by using an alkali-urea water system to obtain modified paper pulp, carrying out dehydration, pulp distribution and drying on the modified paper pulp to obtain corrugated base paper, carrying out rolling and glue spraying reinforcement on the corrugated base paper, drying the corrugated base paper together with the corrugated base paper, bonding the corrugated base paper by using a bonding agent to obtain the corrugated board, and bonding a waterproof layer on the surface of the corrugated base paper to obtain the corrugated carton. According to the invention, the amino cellulose is added by a coprecipitation method, so that the amino cellulose and the pulp fiber are fully entangled and interpenetrated, the strength and the wear resistance of the product are improved, and the waterproof performance of the product is ensured by arranging a waterproof layer.
Description
Technical Field
The invention relates to the field of packaging materials, in particular to a preparation process of an environment-friendly waterproof corrugated carton.
Background
Corrugated paper is a common packaging paper, and has the advantages of reasonable structure, simple processing, light weight, low cost, convenient storage and transportation and the like, so the corrugated paper becomes the most extensive paper container package and is widely used in the field of transportation and packaging. Corrugated paper is a plate-like object formed by bonding liner paper and corrugated paper formed by processing with a corrugating roll, and is generally classified into single corrugated board and double corrugated board.
With the wide application of corrugated paper boxes, the quality requirements of the packaging industry for corrugated paper are also higher and higher: the corrugated paper is required to have stronger bursting index and ring crush index; the corrugated case is mainly composed of paper fibers, can be prepared from waste paper, and has the characteristics of environmental protection and sustainability, but the corrugated paper prepared from the waste paper has weak bursting index and ring crush index, so that the corrugated case is extremely easy to rot in the packaging or transportation process.
On the other hand, the adhesive is used as an important material in the production process of corrugated cartons, various quality indexes of the paperboard and the cartons are almost related to the adhesive, meanwhile, the use of the adhesive also causes certain resistance for the post-recycling treatment of the cartons, and the existing adhesive is difficult to meet the requirements of high performance and environment-friendly recycling at the same time. Meanwhile, the main component of the corrugated case is paper fiber with strong water absorption, so that the corrugated case is easily affected with damp, the damage of the corrugated case is further caused, a large amount of paper cases are easily wasted, and the use cost of a user is seriously improved.
Disclosure of Invention
Aiming at the problems, the invention provides a preparation process of an environment-friendly waterproof corrugated case.
The purpose of the invention is realized by adopting the following technical scheme:
a preparation process of an environment-friendly waterproof corrugated case comprises the following steps:
(1) pulping, namely crushing the recycled waste paper by using a crusher, putting the crushed recycled waste paper into a stirrer, adding warm water into the stirrer, stirring to prepare slurry with uniform texture, filtering the slurry by using a filter screen, and removing large-particle impurities to obtain paper pulp;
(2) fiber compounding, namely weighing amino cellulose, dispersing the amino cellulose in a sodium hydroxide solution under an ice-water bath condition, fully stirring and mixing the amino cellulose and the sodium hydroxide solution uniformly, adding a urea solution, violently stirring the urea solution until the solution is transparent, centrifuging the solution to obtain a supernatant to prepare an amino cellulose solution, adding the amino cellulose solution into the paper pulp obtained in the step (1) for solution blending, uniformly mixing the solution, slowly adding an ethanol solution for dilution under the condition of keeping stirring, standing the solution overnight after the addition is finished, and soaking and washing the solution with deionized water after solid-liquid separation to prepare composite paper pulp;
(3) dewatering and pulp distribution, namely dewatering the composite paper pulp obtained in the step (2), and respectively distributing pulp to the dewatered paper pulp by using a pulp distributor;
(4) primary drying, namely drying the paper pulp subjected to pulp distribution in the step (3) to prepare corrugated base paper;
(5) pressing, namely rolling part of the corrugated base paper in the step (4) by using a corrugating roller to prepare corrugated paper;
(6) spraying glue, namely spraying the top and the bottom of the corrugated paper obtained in the step (5) with a strengthening glue, and spraying the top and/or the bottom of the corrugated base paper obtained in the step (4) with a strengthening glue;
(7) secondary drying, namely drying the corrugated paper and the corrugated base paper in the step (6) in drying equipment;
(8) bonding, namely combining the corrugated paper and the corrugated base paper in the step (7) according to a designed combination mode and bonding by adopting a bonding agent to obtain a corrugated board;
(9) and (4) laminating, namely absorbing dust of the corrugated board obtained in the step (8) by using an electrostatic adsorption machine, adhering a waterproof layer on the surface of the corrugated board, and then pressing and forming to obtain the environment-friendly waterproof corrugated carton.
Preferably, in the step (2), the concentration of the sodium hydroxide solution is 10-20 wt.%, the concentration of the urea solution is 20-28 wt.%, and the mass ratio of the amino cellulose to the sodium hydroxide solution and the urea solution is 1: (10-14): (10-14).
Preferably, the solid content of the pulp in the step (1) is 30%, and the mass ratio of the amino cellulose solution in the step (2) to the pulp is 1: (1-1.3).
Preferably, the ethanol solution in the step (2) is pyrenebutyric acid-ethanol solution dispersed with graphene, wherein the concentrations of the graphene and the pyrenebutyric acid are both 1-2 wt.%.
Preferably, the preparation method of the amino cellulose comprises the following steps:
weighing dry cellulose, adding the cellulose into dimethylformamide, heating to 120 ℃ at a solid-to-liquid ratio of (4-5) g/100mL, keeping the temperature and stirring for 1-2h, adding anhydrous lithium chloride while the solution is hot, continuously stirring until the solution is transparent after cooling, adding triethylamine, fully mixing, dropwise adding a dimethylformamide solution of p-toluenesulfonyl chloride under the stirring condition, continuously stirring and reacting for 24h after dropwise adding is finished, adding ice water for diluting, filtering out precipitates, washing the precipitates sequentially with deionized water and ethanol, dissolving the precipitates in dimethyl sulfoxide after vacuum drying, adding ethylenediamine, fully mixing, heating to 120 ℃ at 100 ℃, keeping the temperature and stirring for 4-6h, cooling, adding acetone for diluting, filtering out precipitates, washing the precipitates sequentially with acetone and ethanol, and drying in vacuum to obtain the amino cellulose;
wherein the mass ratio of the cellulose to the anhydrous lithium chloride, the triethylamine, the p-toluenesulfonyl chloride and the ethylenediamine is 1: 2: (2-2.2): (0.7-0.8): (2-3).
Preferably, the adhesive is a modified epoxy resin adhesive, the modified epoxy resin adhesive is composed of a component A and a component B, the component A comprises a modified epoxy resin monomer, and the component B is a curing agent.
Preferably, the preparation method of the modified epoxy resin monomer comprises the following steps:
s1, weighing 4-hydroxy-3-methoxybenzaldehyde, dissolving in absolute methanol, and stirring uniformly to obtain a transparent solution A; weighing p-aminophenol and dissolving the p-aminophenol in absolute methanol to obtain a solution B, slowly dripping the solution B into the solution A under the condition of rapid stirring, keeping the temperature of 50-60 ℃ after the solution B is added, stirring and reacting for 4-5 hours, and evaporating the solvent after the reaction is finished to obtain an addition product;
wherein the mixing mass ratio of the 4-hydroxy-3-methoxybenzaldehyde to the p-aminophenol is (2-2.1): 1;
s2, adding epichlorohydrin and a sodium hydroxide solution into the addition product, stirring and reacting for 3-4h at 50-60 ℃ under a reduced pressure condition, adding the sodium hydroxide solution twice after the reaction is finished, heating to 60-70 ℃, stirring and reacting for 0.5-1h, adding epichlorohydrin twice after the reaction is finished, keeping the temperature and stirring and reacting for 1-2h, adding toluene for diluting, washing an organic layer with the sodium hydroxide solution and deionized water in sequence, and evaporating to remove the solvent to obtain the modified epoxy resin monomer;
wherein the mass ratio of the addition product to the epichlorohydrin, the sodium hydroxide, the secondary epichlorohydrin and the secondary sodium hydroxide is 10: (6-6.5): (0.1-0.2): (1-1.2): (0.5-0.6).
Preferably, the curing agent is a modified polyamine curing agent, and the preparation method comprises the following steps: adding heptafluorobutyric acid into a methanol solution of polyamine drop by drop, heating to 40-50 ℃ after the addition is finished, stirring for reaction for 1h, and evaporating the solvent after the reaction is finished to obtain the modified polyamine curing agent;
wherein the polyamine is diethylenetriamine, triethylenetetramine or tetraethylenepentamine.
Preferably, the component A also comprises polytetrafluoroethylene nanoparticles and/or perfluoropolyether.
The invention has the beneficial effects that:
(1) aiming at the problem of low strength of the existing corrugated case, the method takes the amino cellulose as an external additive on the basis of pulp making of the waste paper case, and coprecipitates the amino cellulose and paper pulp through an alkali-urea water system, so that the cellulose and paper pulp fibers are fully entangled and interpenetrated, and the strength and the wear resistance of the product are improved.
(2) The corrugated case can be recycled and pulped for reuse after being discarded, and because the used adhesive cannot be recycled, the further pulping treatment of the waste paper case is influenced.
(3) The invention further improves the waterproof performance, specifically, on the basis of arranging the waterproof layer on the outer layer, the invention endows the adhesive layer with good waterproof and anti-permeability performance by modifying the curing agent with fluorinated alkyl, and further, the invention can further improve the waterproof performance of the adhesive layer by doping perfluoropolyether or polytetrafluoroethylene nano-filler.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
The embodiment relates to a preparation process of an environment-friendly waterproof corrugated board, which comprises the following steps:
(1) pulping, namely crushing the recycled waste paper by using a crusher, putting the crushed recycled waste paper into a stirrer, adding warm water into the stirrer, stirring to prepare slurry with uniform texture, filtering the slurry by using a filter screen, and removing large-particle impurities to obtain paper pulp;
the solid content of the pulp is 30%;
(2) fiber compounding, namely weighing amino cellulose, dispersing the amino cellulose in a sodium hydroxide solution under an ice-water bath condition, fully stirring and mixing the amino cellulose and the sodium hydroxide solution uniformly, adding a urea solution, violently stirring the urea solution until the solution is transparent, centrifuging the solution to obtain a supernatant to prepare an amino cellulose solution, adding the amino cellulose solution into the paper pulp obtained in the step (1) for solution blending, uniformly mixing the solution, slowly adding an ethanol solution for dilution under the condition of keeping stirring, standing the solution overnight after the addition is finished, and soaking and washing the solution with deionized water after solid-liquid separation to prepare composite paper pulp;
the concentration of the sodium hydroxide solution is 14 wt.%, the concentration of the urea solution is 24 wt.%, and the mass ratio of the amino cellulose to the sodium hydroxide solution and the urea solution is 1: 12: 12, the mass ratio of the amino cellulose solution to the pulp is 1: 1.2;
(3) dewatering and pulp distribution, namely dewatering the composite paper pulp obtained in the step (2), and respectively distributing pulp to the dewatered paper pulp by using a pulp distributor;
(4) primary drying, namely drying the paper pulp subjected to pulp distribution in the step (3) to prepare corrugated base paper;
(5) pressing, namely rolling part of the corrugated base paper in the step (4) by using a corrugating roller to prepare corrugated paper;
(6) spraying glue, namely spraying the top and the bottom of the corrugated paper obtained in the step (5) with a strengthening glue, and spraying the top and/or the bottom of the corrugated base paper obtained in the step (4) with a strengthening glue;
(7) secondary drying, namely drying the corrugated paper and the corrugated base paper in the step (6) in drying equipment;
(8) bonding, namely bonding the upper and lower surfaces of the corrugated paper in the step (7) with the corrugated base paper by using a bonding agent to obtain a corrugated board;
the adhesive is bisphenol A epoxy resin adhesive, and the curing agent is diethylenetriamine.
The preparation method of the amino cellulose comprises the following steps:
weighing dry cellulose, adding the cellulose into dimethylformamide, wherein the solid-to-liquid ratio is 4g/100mL, heating to 120 ℃ of 100-;
wherein the mass ratio of the cellulose to the anhydrous lithium chloride, the triethylamine, the p-toluenesulfonyl chloride and the ethylenediamine is 1: 2: 2.2: 0.7: 2.4.
example 2
The embodiment relates to a preparation process of an environment-friendly waterproof corrugated board, which has the same process steps as the embodiment 1, and is characterized in that:
the ethanol solution in the step (2) is pyrenebutyric acid-ethanol solution dispersed with graphene, wherein the concentrations of the graphene and the pyrenebutyric acid are both 1 wt.%.
Example 3
The embodiment relates to a preparation process of an environment-friendly waterproof corrugated board, which has the same process steps as the embodiment 1, and is characterized in that:
the adhesive is a modified epoxy resin adhesive, the modified epoxy resin adhesive is composed of a component A and a component B, the component A is a modified epoxy resin monomer, and the component B is diethylenetriamine.
The preparation method of the modified epoxy resin monomer comprises the following steps:
s1, weighing 4-hydroxy-3-methoxybenzaldehyde, dissolving in absolute methanol, and stirring uniformly to obtain a transparent solution A; weighing p-aminophenol and dissolving the p-aminophenol in absolute methanol to obtain a solution B, slowly dripping the solution B into the solution A under the condition of rapid stirring, keeping the temperature of 50-60 ℃ after the solution B is added, stirring and reacting for 4-5 hours, and evaporating the solvent after the reaction is finished to obtain an addition product;
wherein the mixing mass ratio of the 4-hydroxy-3-methoxybenzaldehyde to the p-aminophenol is 2.1: 1;
s2, adding epichlorohydrin and 30% sodium hydroxide solution into the addition product, carrying out stirring reaction for 3-4h at 50-60 ℃ under the condition of reduced pressure (absolute pressure is controlled to be 15-30kPa), adding 50% sodium hydroxide solution twice after the reaction is finished, heating to 60-70 ℃, carrying out stirring reaction for 0.5-1h, adding epichlorohydrin twice after the reaction is finished, carrying out stirring reaction for 1-2h at a constant temperature, adding toluene for dilution, washing an organic layer with 12% sodium hydroxide solution and deionized water in sequence, and steaming to remove the solvent to obtain the modified epoxy resin monomer;
wherein the mass ratio of the addition product to the epichlorohydrin, the sodium hydroxide, the secondary epichlorohydrin and the secondary sodium hydroxide is 10: 6.2: 0.12: 1.1: 0.55.
example 4
The embodiment relates to a preparation process of an environment-friendly waterproof corrugated board, which has the same process steps as the embodiment 3, and is characterized in that:
the curing agent is a modified diethylenetriamine curing agent, and the preparation method comprises the following steps: adding heptafluorobutyric acid dropwise into a methanol solution of diethylenetriamine, wherein the molar ratio of the diethylenetriamine to the heptafluorobutyric acid is 1: 1; after the addition, the temperature is raised to 40-50 ℃ and the reaction is stirred for 1h, and after the reaction is finished, the solvent is evaporated to obtain the modified diethylenetriamine curing agent.
Example 5
The embodiment relates to a preparation process of an environment-friendly waterproof corrugated board, which has the same process steps as the embodiment 3, and is characterized in that:
the component A also comprises 1% of perfluoropolyether (Krytox) or polytetrafluoroethylene nanoparticles.
Comparative example
The difference from example 1 is that: step (2) is omitted.
The mechanical strength including the edge pressure strength, the bursting strength, and the puncture strength and the waterproof performance including the water penetration time (under 1m water column pressure) of the corrugated boards of examples 1 to 5 and the comparative example were measured, and the test results were as follows:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example | |
| Edge pressure intensity (kN/m) | 48.9 | 54.8 | 48.7 | 48.5 | 47.9 | 11.2 |
| Burst Strength (kPa) | 3246 | 3650 | 3175 | 3120 | 3065 | 1740 |
| Puncture strength (J) | 22.1 | 23.4 | 22.0 | 21.4 | 21.0 | 8.9 |
| Water penetration time (h) | 0.002 | 0.002 | 0.01 | 22.4 | 23.5 | 0.002 |
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The preparation process of the environment-friendly waterproof corrugated case is characterized by comprising the following steps of:
(1) pulping, namely crushing the recycled waste paper by using a crusher, putting the crushed recycled waste paper into a stirrer, adding warm water into the stirrer, stirring to prepare slurry with uniform texture, filtering the slurry by using a filter screen, and removing large-particle impurities to obtain paper pulp;
(2) fiber compounding, namely weighing amino cellulose, dispersing the amino cellulose in a sodium hydroxide solution under an ice-water bath condition, fully stirring and mixing the amino cellulose and the sodium hydroxide solution uniformly, adding a urea solution, violently stirring the urea solution until the solution is transparent, centrifuging the solution to obtain a supernatant to prepare an amino cellulose solution, adding the amino cellulose solution into the paper pulp obtained in the step (1) for solution blending, uniformly mixing the solution, slowly adding an ethanol solution for dilution under the condition of keeping stirring, standing the solution overnight after the addition is finished, and soaking and washing the solution with deionized water after solid-liquid separation to prepare composite paper pulp;
(3) dewatering and pulp distribution, namely dewatering the composite paper pulp obtained in the step (2), and respectively distributing pulp to the dewatered paper pulp by using a pulp distributor;
(4) primary drying, namely drying the paper pulp subjected to pulp distribution in the step (3) to prepare corrugated base paper;
(5) pressing, namely rolling part of the corrugated base paper in the step (4) by using a corrugating roller to prepare corrugated paper;
(6) spraying glue, namely spraying the top and the bottom of the corrugated paper obtained in the step (5) with a strengthening glue, and spraying the top and/or the bottom of the corrugated base paper obtained in the step (4) with a strengthening glue;
(7) secondary drying, namely drying the corrugated paper and the corrugated base paper in the step (6) in drying equipment;
(8) bonding, namely combining the corrugated paper and the corrugated base paper in the step (7) according to a designed combination mode and bonding by adopting a bonding agent to obtain a corrugated board;
(9) and (4) laminating, namely absorbing dust of the corrugated board obtained in the step (8) by using an electrostatic adsorption machine, adhering a waterproof layer on the surface of the corrugated board, and then pressing and forming to obtain the environment-friendly waterproof corrugated carton.
2. The manufacturing process of the environment-friendly waterproof corrugated carton according to claim 1, wherein the concentration of the sodium hydroxide solution in the step (2) is 10-20 wt.%, the concentration of the urea solution in the step (2) is 20-28 wt.%, and the mass ratio of the amino cellulose to the sodium hydroxide solution and the urea solution is 1: (10-14): (10-14).
3. The manufacturing process of the environment-friendly waterproof corrugated carton according to claim 1, wherein the solid content of the pulp in the step (1) is 30%, and the mass ratio of the amino cellulose solution to the pulp in the step (2) is 1: (1-1.3).
4. The manufacturing process of the environment-friendly waterproof corrugated case according to claim 1, wherein the ethanol solution in the step (2) is pyrenebutyric acid-ethanol solution in which graphene is dispersed, wherein the concentration of each of the graphene and the pyrenebutyric acid is 1-2 wt.%.
5. The process for preparing an environment-friendly waterproof corrugated carton according to claim 1, wherein the method for preparing the amino cellulose comprises the following steps:
weighing dry cellulose, adding the cellulose into dimethylformamide, heating to 120 ℃ at a solid-to-liquid ratio of (4-5) g/100mL, keeping the temperature and stirring for 1-2h, adding anhydrous lithium chloride while the solution is hot, continuously stirring until the solution is transparent after cooling, adding triethylamine, fully mixing, dropwise adding a dimethylformamide solution of p-toluenesulfonyl chloride under the stirring condition, continuously stirring and reacting for 24h after dropwise adding is finished, adding ice water for diluting, filtering out precipitates, washing the precipitates sequentially with deionized water and ethanol, dissolving the precipitates in dimethyl sulfoxide after vacuum drying, adding ethylenediamine, fully mixing, heating to 120 ℃ at 100 ℃, keeping the temperature and stirring for 4-6h, cooling, adding acetone for diluting, filtering out precipitates, washing the precipitates sequentially with acetone and ethanol, and drying in vacuum to obtain the amino cellulose;
wherein the mass ratio of the cellulose to the anhydrous lithium chloride, the triethylamine, the p-toluenesulfonyl chloride and the ethylenediamine is 1: 2: (2-2.2): (0.7-0.8): (2-3).
6. The process for preparing an environment-friendly waterproof corrugated carton according to claim 1, wherein the adhesive is a modified epoxy resin adhesive, the modified epoxy resin adhesive is composed of a component A and a component B, the component A comprises a modified epoxy resin monomer, and the component B is a curing agent.
7. The process for preparing an environment-friendly waterproof corrugated carton according to claim 6, wherein the preparation method of the modified epoxy resin monomer comprises the following steps:
s1, weighing 4-hydroxy-3-methoxybenzaldehyde, dissolving in absolute methanol, and stirring uniformly to obtain a transparent solution A; weighing p-aminophenol and dissolving the p-aminophenol in absolute methanol to obtain a solution B, slowly dripping the solution B into the solution A under the condition of rapid stirring, keeping the temperature of 50-60 ℃ after the solution B is added, stirring and reacting for 4-5 hours, and evaporating the solvent after the reaction is finished to obtain an addition product;
wherein the mixing mass ratio of the 4-hydroxy-3-methoxybenzaldehyde to the p-aminophenol is (2-2.1): 1;
s2, adding epichlorohydrin and a sodium hydroxide solution into the addition product, stirring and reacting for 3-4h at 50-60 ℃ under a reduced pressure condition, adding the sodium hydroxide solution twice after the reaction is finished, heating to 60-70 ℃, stirring and reacting for 0.5-1h, adding epichlorohydrin twice after the reaction is finished, keeping the temperature and stirring and reacting for 1-2h, adding toluene for diluting, washing an organic layer with the sodium hydroxide solution and deionized water in sequence, and evaporating to remove the solvent to obtain the modified epoxy resin monomer;
wherein the mass ratio of the addition product to the epichlorohydrin, the sodium hydroxide, the secondary epichlorohydrin and the secondary sodium hydroxide is 10: (6-6.5): (0.1-0.2): (1-1.2): (0.5-0.6).
8. The process for preparing an environment-friendly waterproof corrugated carton according to claim 6, wherein the curing agent is a modified polyamine curing agent, and the preparation method comprises the following steps: adding heptafluorobutyric acid into a methanol solution of polyamine drop by drop, heating to 40-50 ℃ after the addition is finished, stirring for reaction for 1h, and evaporating the solvent after the reaction is finished to obtain the modified polyamine curing agent;
wherein the polyamine is diethylenetriamine, triethylenetetramine or tetraethylenepentamine.
9. The process for preparing an environment-friendly waterproof corrugated carton according to claim 6, wherein the component A further comprises polytetrafluoroethylene nanoparticles and/or perfluoropolyether.
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