CN111910469A - High-strength corrugated paper and preparation method thereof - Google Patents

High-strength corrugated paper and preparation method thereof Download PDF

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Publication number
CN111910469A
CN111910469A CN201910384095.4A CN201910384095A CN111910469A CN 111910469 A CN111910469 A CN 111910469A CN 201910384095 A CN201910384095 A CN 201910384095A CN 111910469 A CN111910469 A CN 111910469A
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China
Prior art keywords
parts
paper
strength
corrugated paper
layer
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CN201910384095.4A
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Chinese (zh)
Inventor
刘伟锋
刘志锋
赖耀康
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Dongguan Shunyu Paper Industry Co ltd
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Dongguan Shunyu Paper Industry Co ltd
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Priority to CN201910384095.4A priority Critical patent/CN111910469A/en
Publication of CN111910469A publication Critical patent/CN111910469A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/36—Inorganic fibres or flakes
    • D21H13/38—Inorganic fibres or flakes siliceous
    • D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/11—Halides
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/12—Organo-metallic compounds
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • 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
    • D21H17/26—Ethers thereof
    • 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
    • D21H17/28—Starch
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/35—Polyalkenes, e.g. polystyrene
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/53—Polyethers; Polyesters
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/46—Non-macromolecular organic compounds
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/34—Ignifugeants
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents

Abstract

The invention relates to the technical field of corrugated paper, in particular to high-strength corrugated paper and a preparation method thereof. The corrugated paper that excels in is including inoxidizing coating, outside paper layer, the wavy flute raw paper layer of high strength, the inner face paper layer that from top to bottom sets gradually, outside paper layer and inner face paper layer all pass through gluing agent and the bonding of the wavy flute raw paper layer of high strength. The corrugated paper has high strength, excellent flame retardance, waterproofness and ring crush index, stable bonding of each layer and long service life. The preparation method of the high-strength corrugated paper has the advantages of convenient operation and control, high production efficiency, contribution to industrial mass production, realization of effective utilization of wastes by using the waste corrugated paper and the crop straws as main raw materials, low production cost, stable quality of the prepared corrugated paper and high strength.

Description

High-strength corrugated paper and preparation method thereof
Technical Field
The invention relates to the technical field of corrugated paper, in particular to high-strength corrugated paper and a preparation method thereof.
Background
Corrugated paper is a plate-like object formed by bonding liner paper and corrugated paper formed by processing corrugated sticks, and is generally divided into single corrugated board and double corrugated board, and the corrugated board is widely used for packaging and transporting various articles. However, the existing corrugated paper is often discarded arbitrarily after use, which causes environmental pollution and waste of resources, and the strength of the corrugated paper is not sufficient in the use process, and the packaged articles cannot be protected more effectively, so the strength of the corrugated paper needs to be improved.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the high-strength corrugated paper, which is provided with the protective layer, the outer paper layer, the high-strength corrugated raw paper layer and the inner paper layer from top to bottom, so that the obtained corrugated paper is high in strength, excellent in flame retardance, waterproofness and ring crush index, stable in bonding of all layers and long in service life.
The invention also aims to provide the high-strength corrugated paper and the preparation method thereof, the method has the advantages of convenient operation and control, high production efficiency, low production cost, contribution to industrial mass production, stable quality of the prepared corrugated paper and high strength.
The purpose of the invention is realized by the following technical scheme: the utility model provides a corrugated paper excels in includes inoxidizing coating, outside paper layer, the wavy flute raw paper layer of high strength, the inner face paper layer that from top to bottom sets gradually, outside paper layer and inner face paper layer all pass through gluing agent and the bonding of the wavy flute raw paper layer of high strength.
Further, the preparation method of the high-strength corrugated raw paper layer comprises the following steps:
a1, taking 50-60 parts of waste corrugated paper, 18-24 parts of crop straws, 3-5 parts of plant starch, 8-14 parts of polyester fibers, 2-4 parts of sodium alkyl succinate sulfonate and 280 parts of water, stirring and mixing uniformly, crushing, and filtering, screening and removing impurities to obtain base paper slurry; pre-crushing the waste corrugated paper and the crop straws before mixing;
a2, adding 7-13 parts of ethylene propylene diene monomer, 5-10 parts of nano silicon dioxide, 8-15 parts of glass fiber, 5-9 parts of polyacrylamide, 5-10 parts of mildew preventive, 4-6 parts of fatty alcohol-polyoxyethylene ether and 4-8 parts of carboxymethyl cellulose into base paper pulp for pulping, fully mixing uniformly, standing for 60-90min to obtain pulp liquid;
a3, dewatering and squeezing the uniformly mixed pulp liquid by a paper machine, then drying, rolling, rewinding and cutting to obtain the high-strength corrugated raw paper layer.
The high-strength corrugated raw paper layer adopts the cooperation and synergistic effect of waste corrugated paper, crop straws, polyester fibers and glass fibers, and the fibers in the four raw materials are combined with each other, so that the structural strength of the corrugated paper is obviously improved, and the ring crush index of the corrugated board is improved. Polyacrylamide can increase the retention of fines in the paper. The ethylene propylene diene monomer rubber has low density and high filling property, and improves the aging resistance, the corrosion resistance and the strength of the raw paper layer. By adding the glass fiber and the nano silicon dioxide, the nano silicon dioxide can be uniformly dispersed in the high-strength corrugated raw paper layer, so that the strength, ageing resistance, wear resistance and chemical resistance of the corrugated raw paper layer paper are improved. The fatty alcohol-polyoxyethylene ether, the hydroxypropyl methyl cellulose and the sodium sulfosuccinate have good thickening effect, can promote the combination of waste corrugated paper, crop straws, polyester fibers and glass fibers, improve the compatibility and distribution uniformity of each component, and can improve the yield of coarse pulp and the ring crush index.
Further, in the step a1, the plant starch is at least one of wheat starch, rice starch, corn starch and tapioca starch. The raw materials are wide in source, the crosslinking degree of each raw material can be effectively improved, and the toughness and the strength of the corrugated raw paper layer are improved.
Further, in the step a1, the crop straw is at least one of wheat straw and corn straw. Furthermore, the crop straws are composed of wheat straws and corn straws according to the mass ratio of 1.5-2: 1. The raw material source is wide, the production cost is low, and the corrugated raw paper layer is non-toxic and pollution-free, so that the prepared corrugated raw paper layer is lighter and has high strength.
Further, in the step A2, the mildew preventive is 8-hydroxyquinoline copper, diethyl-2, 3-epoxypropyl- [3- (methyldimethoxy) ] silicon propyl ammonium chloride and butyl p-hydroxybenzoate in a weight ratio (0.4-0.8): (1-1.5) and 1. When the high-strength corrugated raw paper is added into a high-strength corrugated raw paper layer system, the high-strength corrugated raw paper layer has good sterilization and bacteriostasis effects, the corrugated paper is not easy to mildew, and the service life of the corrugated paper is prolonged.
Further, in the step A2, the beating rotation speed is 150-; the treatment temperature is 80-85 ℃. Through the steps and the parameters, the raw materials are uniformly mixed, the compatibility of all components is good, and the strength and the service life of the corrugated raw paper layer are favorably improved.
Further, the protective layer is made of a protective layer material, and the protective layer material comprises the following raw materials in parts by weight: 50-60 parts of bisphenol A type epoxy resin, 8-12 parts of nitrile rubber, 6-12 parts of ethylene propylene diene monomer, 5-10 parts of methyl vinyl polysiloxane resin, 5-10 parts of nano titanium dioxide, 10-16 parts of a first composite flame retardant, 2-4 parts of alkyl sodium sulfonate, 4-8 parts of melamine, 2-4 parts of polyether silicone oil, 2-4 parts of sucrose ricinoleate, 1-2 parts of methylsilanol mannuronate, 3-6 parts of a curing agent and 15-20 parts of ethanol.
According to the invention, bisphenol A type epoxy resin, nitrile rubber, ethylene propylene diene monomer, melamine and methyl vinyl polysiloxane resin are compounded and matched with other raw materials, so that the prepared protective layer composite material has good moisture resistance and better comprehensive properties such as impact resistance and bending strength; the bisphenol A epoxy resin has good corrosion resistance, high mechanical strength, good electrical insulation and corrosion resistance, and is matched with the nitrile rubber, the ethylene propylene diene monomer and the melamine, so that the waterproof, damp-proof, oil-resistant, wear-resistant and heat-resistant properties of the composite material of the protective layer and the bonding strength of the composite material of the protective layer with the first surface paper layer and the second surface paper layer are improved; the adopted methyl vinyl polysiloxane resin has a longer main chain and large intermolecular force, and can effectively improve the mechanical properties of the composite material of the protective layer, such as strength, toughness, impact resistance and the like; the adopted polyether silicone oil is used as an oil phase, has a compact structure, can form a compact hydrophobic film on the surface of the organic silica gel, and does not influence the air permeability of an organic silica gel system; the sodium alkyl sulfonate can promote the adhesion of the composite material of the protective layer and the corrugated fiber, and improve the flame retardant effect and the mechanical property of the corrugated paper; the cane sugar ricinoleate has high bonding strength with corrugated paper, is matched with methylsilanol mannuronate, can improve the waterproof and moistureproof performance of the corrugated paper, can obviously improve the fluidity of an adhesive, and is convenient for gluing the adhesive.
Further, each part of the first composite flame retardant comprises the following raw materials in parts by weight: 5-10 parts of aluminum hydroxide, 5-10 parts of ammonium polyphosphate, 4-8 parts of magnesium sulfate whisker and 2-3 parts of melamine cyanurate.
The composite flame retardant disclosed by the invention has the advantages that the flame retardant performance and the thermal stability of the protective layer can be obviously improved by compounding and cooperating the aluminum hydroxide, the ammonium polyphosphate, the magnesium sulfate whisker and the melamine cyanuric acid; the aluminum hydroxide is an inorganic flame retardant, is environment-friendly and harmless, has stable performance in water, light and heat environments, is non-volatile, prevents fuming, does not produce drops and toxic gases, and does not pollute the environment after combustion; the ammonium polyphosphate has good compatibility with phenolic resin, nitrile rubber and polytetrafluoroethylene in the composite material of the protective layer, does not precipitate, has good thermal stability, forms a carbon foam layer during combustion, and does not generate irritant gas; the magnesium sulfate whisker has the characteristics of good flame retardant property, no toxicity and small smoke amount, can be used as a flame retardant synergist and a reinforcing material, has good appearance, excellent rigidity, impact resistance and high flexural modulus, has extremely low volume shrinkage, high dimensional accuracy and heat resistance, has good compatibility with phenolic resin, nitrile rubber and polytetrafluoroethylene in a protective layer, and can show excellent physical and mechanical properties after being mixed. The melamine cyanuric acid adopted forms a carbon foam layer when burning, plays a role in protecting the adhesive, insulating heat and oxygen, greatly reduces smoke density and toxic gas, and does not generate irritant hydrogen halide gas.
Further, the curing agent is at least one of ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylene tetramine, diethylaminopropylamine and m-phenylenediamine. By adopting the curing agent, the epoxy resin curing agent can react with epoxy resin and other substances to form a reticular three-dimensional polymer, so that the comprehensive performance of the polymer is improved.
Further, the preparation method of the protective layer composite material comprises the following steps: adding bisphenol A epoxy resin into ethanol, uniformly mixing, adding nano titanium dioxide, uniformly stirring, then adding nitrile rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, nano titanium dioxide, a first composite flame retardant, sodium alkylsulfonate, melamine, polyether silicone oil, sucrose ricinoleate and methyl silanol mannuronate, stirring for 10-15min, adding a curing agent, and uniformly stirring to obtain the protective layer composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 30-35 parts of oxidized starch, 5-10 parts of acrylic resin, 3-6 parts of a second composite flame retardant, 6-9 parts of nano alumina particles, 2-4 parts of N, N-methylene dipropionamide, 1-2 parts of hydroxypropyl methyl cellulose, 1-2 parts of wood fiber, 0.5-1 part of potassium persulfate, 5-10 parts of vinyl acetate-ethylene copolymer emulsion and 40-50 parts of water.
The adhesive is compounded by oxidized starch, acrylic resin and vinyl acetate-ethylene copolymer emulsion and is matched with other raw materials, so that the prepared adhesive has good mechanical property and adhesive strength and good permeability, the high-strength corrugated raw paper layer, the outer paper layer and the inner paper layer are stably bonded, the high-strength corrugated paper has good adhesive strength, is not easy to degum and has good waterproofness, the bonding can be realized at the temperature of 110-130 ℃, and the practicability is good. The wood fiber has good dimensional stability and moisture transmission function, is beneficial to improving the crack resistance of the adhesive, can ensure that the hydration reaction of the adhesive and the corrugated board interfaces of the outer paper layer, the high-strength corrugated raw paper layer and the inner paper layer is sufficient, improves the bonding strength, the bonding uniformity and the moisture resistance, and can be rapidly dispersed in an adhesive system to form a spatial three-dimensional structure. Potassium persulfate may promote polymerization of the system. The N, N-methylene-bis-propionamide can promote the cross-linking of oxidized starch, improve the flexibility of the corrugated paper and improve the strength of the corrugated paper. The hydroxypropyl methyl cellulose has good compatibility with other raw materials in an adhesive system, has good thickening effect and film forming property, and is beneficial to improving the adhesive strength and the adhesive uniformity of the adhesive.
Furthermore, the oxidized starch is prepared by oxidizing at least one of wheat starch, corn starch and tapioca starch. The raw material starch is not suitable for surface sizing due to high viscosity, and the oxidized starch is prepared by oxidizing the raw material starch and performing modification treatment by degrading macromolecular chains of the raw material starch. The three raw materials of wheat starch, corn starch and cassava starch are easy to obtain, and the industrial production is facilitated.
Further, each part of the second composite flame retardant comprises the following raw materials in parts by weight: 5-10 parts of aluminum hydroxide, 5-10 parts of ammonium polyphosphate, 4-8 parts of magnesium sulfate whisker and 2-3 parts of melamine cyanurate.
The invention also provides a preparation method of the high-strength corrugated paper, which comprises the following steps:
(1) taking the prepared high-strength corrugated raw paper layer;
(2) coating adhesives on the upper surface and the lower surface of the high-strength corrugated raw paper layer;
(3) and respectively pressing an outer paper layer and an inner paper layer on the upper surface and the lower surface of the high-strength corrugated raw paper layer, drying and cooling to obtain the environment-friendly corrugated paper primary product.
(4) Coating a material for the protective layer on the upper surface of the outer paper layer, drying the corrugated paper coated with the material for the protective layer, drying and cooling to obtain the high-strength corrugated paper.
Further, in the step (2), the glue application amount of the adhesive coated on the upper and lower surfaces of the high-strength corrugated raw paper layer is 20-25g/m2。
Further, the step (3) is specifically that the outer paper layer and the inner paper layer are respectively attached to the upper surface and the lower surface of the high-strength corrugated raw paper layer, hot-pressed for 20-30s at the temperature of 120-. Further, hot air drying is adopted after hot pressing, and the drying temperature is 55-75 ℃.
Further, in the step (4), the thickness of the protective layer is 2-3 mm.
Further, in the step (4), the sizing temperature of the material for coating the protective layer is 70-80 ℃.
The high-strength corrugated paper prepared by the steps is convenient to operate and control, high in production efficiency and low in production cost, is beneficial to industrial mass production, can ensure that each colloid can be uniformly spread on the surface by strictly controlling the gluing amount of each layer and controlling the hot-pressing temperature and time, is easy to solidify, ensures that each layer of the prepared corrugated paper is stably bonded, does not have the phenomenon of interlayer separation, has stable quality, and has better toughness and ring crush index.
The invention has the beneficial effects that: according to the corrugated paper, the protective layer, the outer paper layer, the high-strength corrugated raw paper layer and the inner paper layer are arranged from top to bottom, so that the obtained corrugated paper is high in strength, excellent in flame retardance, water resistance and ring crush index, stable in bonding of all layers and long in service life.
The preparation method of the high-strength corrugated paper is convenient to operate and control, high in production efficiency and beneficial to industrial mass production, and waste corrugated paper and crop straws are used as main raw materials, so that the effective utilization of wastes is realized, and the production cost is low; the prepared corrugated paper has stable quality and high strength.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
In this embodiment, a corrugated paper excels in includes inoxidizing coating, outside paper layer, the wavy corrugated raw paper layer of excelling in, the inner face paper layer that from top to bottom set gradually, outside paper layer and inner face paper layer are all through gluing agent and the bonding of the wavy corrugated raw paper layer of excelling in. Further, the high-strength wavy corrugated base paper layer is a U-shaped corrugated base paper layer.
Further, the preparation method of the high-strength corrugated raw paper layer comprises the following steps:
a1, uniformly stirring and mixing 55 parts by weight of waste corrugated paper, 22 parts by weight of crop straws, 4 parts by weight of plant starch, 11 parts by weight of polyester fibers, 3 parts by weight of sodium alkyl succinate sulfonate and 249 parts by weight of water, crushing, and filtering and screening to remove impurities to obtain base paper pulp;
a2, adding 10 parts of ethylene propylene diene monomer, 6 parts of nano silicon dioxide, 10 parts of glass fiber, 4 parts of polyacrylamide, 8 parts of mildew preventive, 5 parts of fatty alcohol-polyoxyethylene ether and 4-8 parts of carboxymethyl cellulose into the base paper pulp for pulping, fully mixing uniformly, and standing for 75min to obtain pulp liquid;
a3, dewatering and squeezing the uniformly mixed pulp liquid by a paper machine, then drying, rolling, rewinding and cutting to obtain the high-strength corrugated raw paper layer.
Furthermore, the outer paper layer and the inner paper layer are made of the same raw material proportion as the high-strength corrugated raw paper layer.
Further, in the step a1, the plant starch is at least one of wheat starch, rice starch, corn starch and tapioca starch.
Further, in the step A1, the crop straws are wheat straws and corn straws according to the mass ratio of 1.5-2: 1.
Further, in the step A2, the mildew preventive is 8-hydroxyquinoline copper, diethyl-2, 3-epoxypropyl- [3- (methyldimethoxy) ] silicon propyl ammonium chloride and butyl p-hydroxybenzoate in a weight ratio (0.4-0.8): (1-1.5) and 1.
Further, in the step A2, the pulping rotation speed is 180r/min, the pulping treatment time is 16min, and the treatment temperature is 82 ℃. The plant starch is wheat starch and corn starch in a mass ratio of 1: 1.
Further, the protective layer is made of a protective layer composite material, and the protective layer composite material comprises the following raw materials in parts by weight: 55 parts of bisphenol A epoxy resin, 10 parts of nitrile rubber, 10 parts of ethylene propylene diene monomer, 7 parts of methyl vinyl polysiloxane resin, 7 parts of nano titanium dioxide, 12 parts of first composite flame retardant, 3 parts of alkyl sodium sulfonate, 6 parts of melamine, 3 parts of polyether silicone oil, 3 parts of sucrose ricinoleate, 1.5 parts of methyl silanol mannuronate, 5 parts of curing agent and 17 parts of ethanol.
Further, each part of the first composite flame retardant comprises the following raw materials in parts by weight: 7 parts of aluminum hydroxide, 6 parts of ammonium polyphosphate, 6 parts of magnesium sulfate whisker and 2.5 parts of melamine cyanurate.
Further, the nano titanium dioxide is nano silicon dioxide, calcium carbonate and nano titanium dioxide according to the weight ratio of 1:2, the particle size of the nano titanium dioxide is 30-60 nm.
Further, the curing agent is composed of ethylenediamine and m-xylylenediamine according to the weight ratio of 1: 1.
Further, the preparation method of the protective layer composite material comprises the following steps:
adding bisphenol A epoxy resin into ethanol, uniformly mixing, adding nano titanium dioxide, uniformly stirring, then adding nitrile rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, nano titanium dioxide, a first composite flame retardant, sodium alkylsulfonate, melamine, polyether silicone oil, sucrose ricinoleate and methyl silanol mannuronate, stirring for 12min, adding a curing agent, and uniformly stirring to obtain the protective layer composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 32 parts of oxidized starch, 7 parts of acrylic resin, 4 parts of a second composite flame retardant, 7 parts of nano alumina particles, 3 parts of N, N-methylene-bis-propionamide, 1.5 parts of hydroxypropyl methyl cellulose, 1.5 parts of wood fiber, 0.8 part of potassium persulfate, 8 parts of vinyl acetate-ethylene copolymer emulsion and 45 parts of water.
Further, each part of the second composite flame retardant comprises the following raw materials in parts by weight: 7 parts of aluminum hydroxide, 6 parts of ammonium polyphosphate, 6 parts of magnesium sulfate whisker and 2.5 parts of melamine cyanurate.
Furthermore, the oxidized starch is prepared by oxidizing wheat starch and corn starch in a mass ratio of 1: 2.
In this embodiment, the preparation method of the high-strength corrugated paper includes the following steps:
(1) taking the prepared high-strength corrugated raw paper layer;
(2) coating adhesives on the upper surface and the lower surface of the high-strength corrugated raw paper layer;
(3) and respectively pressing an outer paper layer and an inner paper layer on the upper surface and the lower surface of the high-strength corrugated raw paper layer, drying and cooling to obtain the environment-friendly corrugated paper primary product.
(4) Coating a material for the protective layer on the upper surface of the outer paper layer to form the protective layer, drying the corrugated paper coated with the material for the protective layer, drying and cooling to obtain the high-strength corrugated paper.
Further, in the step (2), the adhesive application amount of the adhesive coated on the upper and lower surfaces of the high-strength corrugated raw paper layer is 22g/m2。
Further, the step (3) is specifically that an outer paper layer and an inner paper layer are respectively attached to the upper surface and the lower surface of the high-strength corrugated raw paper layer, hot-pressing is carried out for 25s under the conditions that the temperature is 130 ℃ and the pressure is O.5MPa, and the high-strength corrugated paper is prepared after drying and cooling. Further, hot air drying is adopted after hot pressing, and the drying temperature is 60 ℃.
Further, in the step (4), the thickness of the protective layer is 2.5 mm. The sizing temperature of the material for coating the protective layer is 75 ℃.
Example 2
In this embodiment, the preparation method of the high-strength corrugated raw paper layer includes the following steps:
a1, taking 50 parts of waste corrugated paper, 18 parts of crop straws, 3 parts of plant starch, 8 parts of polyester fibers, 2 parts of succinic acid alkyl ester sodium sulfonate and 200 parts of water by weight, uniformly stirring and mixing, crushing, and filtering and screening to remove impurities to obtain base paper pulp;
a2, adding 7 parts of ethylene propylene diene monomer, 5 parts of nano silicon dioxide, 8 parts of glass fiber, 5 parts of polyacrylamide, 6 parts of mildew preventive, 4 parts of fatty alcohol-polyoxyethylene ether and 4 parts of carboxymethyl cellulose into the base paper slurry for pulping, fully mixing uniformly, and standing for 60min to obtain a pulp slurry;
a3, dewatering and squeezing the uniformly mixed pulp liquid by a paper machine, then drying, rolling, rewinding and cutting to obtain the high-strength corrugated raw paper layer.
Further, in the step a1, the plant starch is rice starch and tapioca starch according to a mass ratio of 1: 2. The crop straw is composed of wheat straw and corn straw according to a mass ratio of 1.5-2: 1.
Further, in the step a1, the crop straw is at least one of wheat straw and corn straw.
Further, in the step A2, the mildew preventive is 8-hydroxyquinoline copper, diethyl-2, 3-epoxypropyl- [3- (methyldimethoxy) ] silicon propyl ammonium chloride and butyl p-hydroxybenzoate in a weight ratio (0.4-0.8): (1-1.5) and 1.
Further, in the step A2, the pulping rotation speed is 150r/min, the pulping treatment time is 15min, and the treatment temperature is 85 ℃.
In this embodiment, the protective layer is made of a protective layer composite material, and the protective layer composite material includes the following raw materials in parts by weight: 50 parts of bisphenol A epoxy resin, 8 parts of nitrile rubber, 6 parts of ethylene propylene diene monomer, 5 parts of methyl vinyl polysiloxane resin, 5 parts of nano titanium dioxide, 10 parts of first composite flame retardant, 2 parts of alkyl sodium sulfonate, 4 parts of melamine, 2 parts of polyether silicone oil, 2 parts of sucrose ricinoleate, 1 part of methyl silanol mannuronate, 3 parts of curing agent and 15 parts of ethanol.
Further, each part of the first composite flame retardant comprises the following raw materials in parts by weight: 5 parts of aluminum hydroxide, 5 parts of ammonium polyphosphate, 4 parts of magnesium sulfate whisker and 2 parts of melamine cyanurate.
Furthermore, the particle size of the nano titanium dioxide is 30-60 nm.
Further, the curing agent is triethylene tetramine.
Further, the preparation method of the protective layer composite material comprises the following steps:
adding bisphenol A epoxy resin into ethanol, uniformly mixing, adding nano titanium dioxide, uniformly stirring, then adding nitrile rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, nano titanium dioxide, a first composite flame retardant, sodium alkylsulfonate, melamine, polyether silicone oil, sucrose ricinoleate and methyl silanol mannuronate, stirring for 10min, adding a curing agent, and uniformly stirring to obtain the protective layer composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 30 parts of oxidized starch, 5 parts of acrylic resin, 3 parts of a second composite flame retardant, 6 parts of nano alumina particles, 2 parts of N, N-methylene-bis-propionamide, 1 part of hydroxypropyl methyl cellulose, 2 parts of wood fiber, 0.5 part of potassium persulfate, 5 parts of vinyl acetate-ethylene copolymer emulsion and 40 parts of water.
Further, each part of the second composite flame retardant comprises the following raw materials in parts by weight: 5 parts of aluminum hydroxide, 5 parts of ammonium polyphosphate, 4 parts of magnesium sulfate whisker and 2 parts of melamine cyanurate.
Furthermore, the oxidized starch is prepared by oxidizing tapioca starch.
In this embodiment, the preparation method of the high-strength corrugated paper includes the following steps:
(1) taking the prepared high-strength corrugated raw paper layer;
(2) coating adhesives on the upper surface and the lower surface of the high-strength corrugated raw paper layer;
(3) and respectively pressing an outer paper layer and an inner paper layer on the upper surface and the lower surface of the high-strength corrugated raw paper layer, drying and cooling to obtain the environment-friendly corrugated paper primary product.
(4) Coating a material for the protective layer on the upper surface of the outer paper layer to form the protective layer, drying the corrugated paper coated with the material for the protective layer, drying and cooling to obtain the high-strength corrugated paper.
Further, in the step (2), the glue application amount of the adhesive coated on the upper and lower surfaces of the high-strength corrugated raw paper layer is 20g/m2。
Further, the step (3) is specifically that an outer paper layer and an inner paper layer are respectively attached to the upper surface and the lower surface of the high-strength corrugated raw paper layer, hot-pressing is carried out for 30s under the conditions that the temperature is 120 ℃ and the pressure is 0.6MPa, and the high-strength corrugated paper is prepared after drying and cooling. Further, hot air drying is adopted after hot pressing, and the drying temperature is 50 ℃.
Further, in the step (4), the thickness of the protective layer is 2 mm. The sizing temperature of the material for coating the protective layer was 70 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 3
In this embodiment, the preparation method of the high-strength corrugated raw paper layer includes the following steps:
a1, taking 60 parts of waste corrugated paper, 24 parts of crop straws, 5 parts of plant starch, 14 parts of polyester fibers, 4 parts of succinic acid alkyl ester sodium sulfonate and 280 parts of water by weight, uniformly stirring and mixing, crushing, and filtering and screening to remove impurities to obtain base paper pulp;
a2, adding 13 parts of ethylene propylene diene monomer, 10 parts of nano silicon dioxide, 15 parts of glass fiber, 9 parts of polyacrylamide, 12 parts of mildew preventive, 6 parts of fatty alcohol-polyoxyethylene ether and 8 parts of carboxymethyl cellulose into the base paper slurry for pulping, fully mixing uniformly, standing for 90min to obtain a paper pulp solution;
a3, dewatering and squeezing the uniformly mixed pulp liquid by a paper machine, then drying, rolling, rewinding and cutting to obtain the high-strength corrugated raw paper layer.
Further, in the step a1, the plant starch is rice starch, wheat starch and tapioca starch according to a mass ratio of 1:1: 2. The crop straw is composed of wheat straw and corn straw according to a mass ratio of 1.5-2: 1.
Further, in the step A2, the mildew preventive is 8-hydroxyquinoline copper, diethyl-2, 3-epoxypropyl- [3- (methyldimethoxy) ] silicon propyl ammonium chloride and butyl p-hydroxybenzoate in a weight ratio (0.4-0.8): (1-1.5) and 1.
Further, in the step A2, the beating rotation speed is 200r/min, the beating treatment time is 20min, and the treatment temperature is 80 ℃.
In this embodiment, the protective layer is made of a protective layer composite material, and the protective layer composite material includes the following raw materials in parts by weight: 60 parts of bisphenol A epoxy resin, 12 parts of nitrile rubber, 12 parts of ethylene propylene diene monomer, 10 parts of methyl vinyl polysiloxane resin, 10 parts of nano titanium dioxide, 16 parts of first composite flame retardant, 4 parts of alkyl sodium sulfonate, 8 parts of melamine, 4 parts of polyether silicone oil, 4 parts of sucrose ricinoleate, 2 parts of methyl silanol mannuronate, 6 parts of curing agent and 20 parts of ethanol.
Further, each part of the first composite flame retardant comprises the following raw materials in parts by weight: 10 parts of aluminum hydroxide, 10 parts of ammonium polyphosphate, 8 parts of magnesium sulfate whisker and 3 parts of melamine cyanurate.
Further, the curing agent is diethylaminopropylamine.
Further, the preparation method of the protective layer composite material comprises the following steps:
adding bisphenol A epoxy resin into ethanol, uniformly mixing, adding nano titanium dioxide, uniformly stirring, then adding nitrile rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, nano titanium dioxide, a first composite flame retardant, sodium alkylsulfonate, melamine, polyether silicone oil, sucrose ricinoleate and methyl silanol mannuronate, stirring for 15min, adding a curing agent, and uniformly stirring to obtain the protective layer composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 35 parts of oxidized starch, 10 parts of acrylic resin, 6 parts of a second composite flame retardant, 9 parts of nano alumina particles, 4 parts of N, N-methylene-bis-propionamide, 2 parts of hydroxypropyl methyl cellulose, 1 part of wood fiber, 1 part of potassium persulfate, 10 parts of vinyl acetate-ethylene copolymer emulsion and 50 parts of water.
Further, the oxidized starch is prepared by mixing the following components in a mass ratio of 1:1, the corn starch and the cassava starch are prepared by oxidation.
Further, in the step (2), the glue application amount of the adhesive coated on the upper and lower surfaces of the high-strength corrugated raw paper layer is 25g/m2。
Further, the step (3) is specifically that the outer paper layer and the inner paper layer are respectively attached to the upper surface and the lower surface of the high-strength corrugated raw paper layer, hot-pressed for 20-30s at the temperature of 120-. Further, hot air drying is adopted after hot pressing, and the drying temperature is 55-75 ℃.
Further, in the step (4), the thickness of the protective layer is 3 mm.
Further, in the step (4), the sizing temperature of the material for coating the protective layer is 80 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 4
In this embodiment, the preparation method of the high-strength corrugated raw paper layer includes the following steps:
a1, uniformly stirring and mixing 58 parts by weight of waste corrugated paper, 20 parts by weight of crop straws, 4 parts by weight of plant starch, 12 parts by weight of polyester fibers, 3 parts by weight of sodium alkyl succinate sulfonate and 250 parts by weight of water, crushing, and filtering and screening to remove impurities to obtain base paper pulp; pre-crushing the waste corrugated paper and the crop straws before mixing;
a2, adding 8 parts of ethylene propylene diene monomer, 7 parts of nano silicon dioxide, 12 parts of glass fiber, 4 parts of polyacrylamide, 6 parts of mildew preventive, 5 parts of fatty alcohol-polyoxyethylene ether and 5 parts of carboxymethyl cellulose into the base paper slurry for pulping, fully mixing uniformly, and standing for 75min to obtain a paper pulp solution;
a3, dewatering and squeezing the uniformly mixed pulp liquid by a paper machine, then drying, rolling, rewinding and cutting to obtain the high-strength corrugated raw paper layer.
Further, in the step A1, the plant starch is wheat starch, corn starch and cassava starch according to the mass ratio of 1:1: 1. The crop straw is composed of wheat straw and corn straw according to a mass ratio of 1.8: 1.
Further, in the step a2, the mildew preventive is 8-hydroxyquinoline copper, diethyl-2, 3-epoxypropyl- [3- (methyldimethoxy) ] silicon propyl ammonium chloride and butyl p-hydroxybenzoate in a weight ratio of 0.5: 1.2: 1.
In this embodiment, the protective layer is made of a protective layer composite material, and the protective layer composite material includes the following raw materials in parts by weight: 55 parts of bisphenol A epoxy resin, 9 parts of nitrile rubber, 10 parts of ethylene propylene diene monomer, 6 parts of methyl vinyl polysiloxane resin, 9 parts of nano titanium dioxide, 15 parts of first composite flame retardant, 2.5 parts of alkyl sodium sulfonate, 5 parts of melamine, 2.5 parts of polyether silicone oil, 3 parts of sucrose ricinoleate, 1.8 parts of methylsilanol mannuronate, 4 parts of curing agent and 16 parts of ethanol.
Further, each part of the first composite flame retardant comprises the following raw materials in parts by weight: 6 parts of aluminum hydroxide, 8 parts of ammonium polyphosphate, 5 parts of magnesium sulfate whisker and 2.5 parts of melamine cyanurate.
Further, the curing agent is hexamethylene diamine.
Further, the preparation method of the protective layer composite material comprises the following steps:
adding bisphenol A epoxy resin into ethanol, uniformly mixing, adding nano titanium dioxide, uniformly stirring, then adding nitrile rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, nano titanium dioxide, a first composite flame retardant, sodium alkylsulfonate, melamine, polyether silicone oil, sucrose ricinoleate and methyl silanol mannuronate, stirring for 14min, adding a curing agent, and uniformly stirring to obtain the protective layer composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 34 parts of oxidized starch, 6 parts of acrylic resin, 4 parts of a second composite flame retardant, 7 parts of nano alumina particles, 3 parts of N, N-methylene-bis-propionamide, 1.5 parts of hydroxypropyl methyl cellulose, 0.7 part of potassium persulfate, 1.5 parts of a curing agent, 6 parts of vinyl acetate-ethylene copolymer emulsion and 45 parts of water.
Furthermore, the oxidized starch is prepared by oxidizing corn starch.
Further, in the step (2), the glue application amount of the adhesive coated on the upper and lower surfaces of the high-strength corrugated raw paper layer is 24g/m2。
Further, the step (3) is specifically that an outer paper layer and an inner paper layer are respectively attached to the upper surface and the lower surface of the high-strength corrugated raw paper layer, hot-pressing is carried out for 28s under the conditions that the temperature is 125 ℃ and the pressure is O.45MPa, and the high-strength corrugated paper is prepared after drying and cooling. Further, hot air drying is adopted after hot pressing, and the drying temperature is 65 ℃.
Further, in the step (4), the thickness of the protective layer is 2.8 mm.
Further, in the step (4), the sizing temperature of the material for coating the protective layer is 72 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Comparative example 1
This comparative example differs from example 1 in that:
the preparation method of the corrugated raw paper layer of comparative example 1 includes the steps of:
a1, taking 66 parts of waste corrugated paper, 22 parts of crop straws, 4 parts of plant starch, 3 parts of succinic acid alkyl ester sodium sulfonate and 249 parts of water by weight, uniformly stirring and mixing, crushing, and filtering, screening and removing impurities to obtain base paper pulp;
a2, adding 10 parts of ethylene propylene diene monomer, 6 parts of nano silicon dioxide and 8 parts of mildew preventive into the base paper pulp, pulping, fully mixing uniformly, standing for 75min to obtain pulp liquid;
and A3, dewatering and squeezing the uniformly mixed pulp liquid by using a paper machine, and then drying, rolling, rewinding and slitting to obtain the wavy corrugated raw paper layer.
The remainder of this comparative example is the same as example 1 and will not be described again here.
Comparative example 2
This comparative example differs from example 1 above in that:
the protective layer is made of a protective layer composite material, and the protective layer composite material comprises the following raw materials in parts by weight: the protective layer composite material comprises the following raw materials in parts by weight: 80 parts of bisphenol A epoxy resin, 10 parts of nitrile rubber, 5 parts of curing agent and 17 parts of ethanol.
The remainder of this comparative example is the same as example 1 and will not be described again here.
Comparative example 3
This comparative example differs from example 1 above in that:
further, the adhesive comprises the following raw materials in parts by weight: 32 parts of oxidized starch, 7 parts of nano alumina particles, 0.8 part of potassium persulfate, 1.5 parts of curing agent and 45 parts of water.
The remainder of this comparative example is the same as example 1 and will not be described again here.
The corrugated paper prepared by the method of the examples 1 to 4 has the gram weight of 120g/m2And carrying out performance tests such as ring crush index, moisture resistance test, vertical combustion level, ageing resistance and the like, wherein the test results are as follows:
Figure 879036DEST_PATH_IMAGE001
the moisture resistance test method is as follows: the corrugated paper prepared in the examples 1 to 4 was sprayed with water mist every 3 hours, and the amount of water sprayed was controlled to 12g/m2And standing for 24 hours after spraying for 3 times, and testing the ring crush index of the corrugated paper.
The adhesive of examples 1-4 has an adhesive strength of 730-750N/m, measured according to GB/T6541-2011. The adhesive in comparative example 3 had an adhesive strength of less than 550N/m. Therefore, the adhesive disclosed by the invention has the advantages that the moistureproof and mildewproof corrugated paper has good adhesive strength, the edges are not easy to come unstuck and warp, and the practicability is good.
From the above, the corrugated paper prepared in the embodiments 1 to 4 of the present invention has good moisture resistance, ring crush index, flame retardancy and aging resistance, and each layer is bonded stably, and the edge is not easy to be degummed or warped, and has a long service life.
The preparation method of the high-strength corrugated paper is convenient to operate and control, high in production efficiency and beneficial to industrial mass production, and waste corrugated paper and crop straws are used as main raw materials, so that the effective utilization of wastes and the production cost are realized; the prepared corrugated paper has stable quality and high strength.
Compared with the example 1, the moisture resistance and the ring crush index of the high-strength corrugated raw paper layer are lower than those of the example 1, which shows that the high-strength corrugated raw paper layer is prepared by compounding the polyester fiber, the glass fiber, the polyacrylamide, the fatty alcohol-polyoxyethylene ether and the carboxymethyl cellulose, and mutually matching the polyester fiber, the glass fiber, the polyacrylamide, the fatty alcohol-polyoxyethylene ether and the carboxymethyl cellulose with other raw materials, so that the ring crush index of the corrugated paper is obviously improved, and the moisture resistance of the corrugated paper is improved.
Compared with the example 1, the moisture resistance and the ring crush index of the corrugated paper are lower than those of the example 1, which shows that the corrugated paper has good moisture resistance, ring crush index and flame retardant property by compounding the ethylene propylene diene monomer, the melamine, the methyl vinyl polysiloxane resin, the polyether silicone oil, the sucrose ricinoleate, the methyl silanol mannuronate and the first composite flame retardant and mutually matching with other raw materials to prepare the protective layer.
Compared with the adhesive in the embodiment 1, the adhesive in the comparative example 3 is different from the adhesive in the embodiment 1, the ring crush index and the aging resistance of the prepared corrugated paper are lower than those in the embodiment 1, and the edge of the corrugated paper is degummed, warped and deformed.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a corrugated paper excels in which: the corrugated paper that excels in is including inoxidizing coating, outside paper layer, the wavy flute raw paper layer of high strength, the inner face paper layer that from top to bottom sets gradually, outside paper layer and inner face paper layer all pass through gluing agent and the bonding of the wavy flute raw paper layer of high strength.
2. The high-strength corrugated paper as set forth in claim 1, wherein: the preparation method of the high-strength corrugated raw paper layer comprises the following steps:
a1, taking 50-60 parts of waste corrugated paper, 18-24 parts of crop straws, 3-5 parts of plant starch, 8-14 parts of polyester fibers, 2-4 parts of sodium alkyl succinate sulfonate and 280 parts of water, stirring and mixing uniformly, crushing, and filtering, screening and removing impurities to obtain base paper slurry; pre-crushing the waste corrugated paper and the crop straws before mixing;
a2, adding 7-13 parts of ethylene propylene diene monomer, 5-10 parts of nano silicon dioxide, 8-15 parts of glass fiber, 5-9 parts of polyacrylamide, 5-10 parts of mildew preventive, 4-6 parts of fatty alcohol-polyoxyethylene ether, 2-3 parts of trimethylolpropane trimethacrylate and 4-8 parts of carboxymethyl cellulose into base paper pulp, pulping, fully mixing uniformly, standing for 60-90min to obtain pulp liquid;
a3, dewatering and squeezing the uniformly mixed pulp liquid by a paper machine, then drying, rolling, rewinding and cutting to obtain the high-strength corrugated raw paper layer.
3. The high-strength corrugated paper as set forth in claim 2, wherein: in the step A1, the plant starch is at least one of wheat starch, rice starch, corn starch and cassava starch.
4. The high-strength corrugated paper as set forth in claim 2, wherein: in the step A1, the crop straw is at least one of wheat straw and corn straw.
5. The high-strength corrugated paper as set forth in claim 2, wherein: in the step A2, the mildew preventive is 8-hydroxyquinoline copper, diethyl-2, 3-epoxypropyl- [3- (methyldimethoxy) ] silicon propyl ammonium chloride and butyl p-hydroxybenzoate in a weight ratio (0.4-0.8): (1-1.5) and 1.
6. The high-strength corrugated paper as set forth in claim 2, wherein: in the step A2, the beating rotation speed is 150-200r/min, the beating treatment time is 15-20min, and the treatment temperature is 80-85 ℃.
7. The high-strength corrugated paper as set forth in claim 1, wherein: the protective layer is made of a protective layer material, and the protective layer material comprises the following raw materials in parts by weight: 50-60 parts of bisphenol A type epoxy resin, 8-12 parts of nitrile rubber, 6-12 parts of ethylene propylene diene monomer, 5-10 parts of methyl vinyl polysiloxane resin, 5-10 parts of nano titanium dioxide, 10-16 parts of a first composite flame retardant, 2-4 parts of alkyl sodium sulfonate, 4-8 parts of melamine, 2-4 parts of polyether silicone oil, 2-4 parts of sucrose ricinoleate, 1-2 parts of methylsilanol mannuronate, 3-6 parts of a curing agent and 15-20 parts of ethanol.
8. The high-strength corrugated paper as set forth in claim 7, wherein: each part of the first composite flame retardant comprises the following raw materials in parts by weight: 5-10 parts of aluminum hydroxide, 5-10 parts of ammonium polyphosphate, 4-8 parts of magnesium sulfate whisker and 2-3 parts of melamine cyanurate.
9. The high-strength corrugated paper as set forth in claim 7, wherein: the preparation method of the protective layer composite material comprises the following steps: adding bisphenol A epoxy resin into ethanol, uniformly mixing, adding nano titanium dioxide, uniformly stirring, then adding nitrile rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, nano titanium dioxide, a first composite flame retardant, sodium alkylsulfonate, melamine, polyether silicone oil, sucrose ricinoleate and methyl silanol mannuronate, stirring for 10-15min, adding a curing agent, and uniformly stirring to obtain the protective layer composite material.
10. A method of making high strength corrugated paper as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:
(1) taking the prepared high-strength corrugated raw paper layer;
(2) coating adhesives on the upper surface and the lower surface of the high-strength corrugated raw paper layer;
(3) respectively pressing an outer paper layer and an inner paper layer on the upper surface and the lower surface of the high-strength corrugated raw paper layer, drying and cooling to obtain an environment-friendly corrugated paper primary product;
(4) coating a material for the protective layer on the upper surface of the outer paper layer to form the protective layer, drying the corrugated paper coated with the material for the protective layer, drying and cooling to obtain the high-strength corrugated paper.
CN201910384095.4A 2019-05-09 2019-05-09 High-strength corrugated paper and preparation method thereof Pending CN111910469A (en)

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