CN111907130A - Flame-retardant corrugated paper and preparation method thereof - Google Patents
Flame-retardant corrugated paper and preparation method thereof Download PDFInfo
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- CN111907130A CN111907130A CN201910384098.8A CN201910384098A CN111907130A CN 111907130 A CN111907130 A CN 111907130A CN 201910384098 A CN201910384098 A CN 201910384098A CN 111907130 A CN111907130 A CN 111907130A
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- 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
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
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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
- 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
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- 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
-
- 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
-
- 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
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
- D21H17/51—Triazines, e.g. melamine
-
- 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
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of corrugated paper, in particular to flame-retardant corrugated paper and a preparation method thereof. Fire-retardant corrugated paper is including first facial tissue layer, wave form core paper layer and the second facial tissue that from top to bottom sets gradually, first facial tissue layer and second facial tissue all pass through gluing agent and the bonding of wave form core paper layer, the upper surface on first facial tissue layer and the lower surface on second facial tissue layer have fire-retardant layer all coated. The corrugated paper has excellent flame retardant property, mechanical property and ageing resistance, each layer is bonded stably, the phenomenon of interlayer separation is avoided, the service life is long, the preparation method is convenient to operate and control, the production efficiency is high, the production cost is low, the corrugated paper is suitable for large-scale industrial production, and the quality of the prepared corrugated paper is stable.
Description
Technical Field
The invention relates to the technical field of corrugated paper, in particular to flame-retardant corrugated paper and a preparation method thereof.
Background
Corrugated cardboard generally comprises a corrugated paper core layer and a cardboard, and corrugated cardboard has good mechanical strength, can withstand the collision and fall in the process of goods transportation, and has been widely used in the aspects of packaging, furniture, decoration, exhibition, etc.
At present, corrugated boards are mainly made of fiber base paper and are easily influenced by external environmental factors such as humidity, temperature and the like. In a high-temperature environment, the corrugated board is easy to conduct absorbed heat to packaged articles, so that the quality of the articles is indirectly reduced; the existing corrugated board has poor flame retardant property, is easy to burn when directly exposed to open fire, damages packaged articles, causes property loss and even life safety threat to people, and is limited in use, so that the flame retardant property and the use safety of the corrugated board are improved, and the corrugated board has very important significance.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the flame-retardant corrugated paper which has excellent flame-retardant performance and mechanical performance, is stable in bonding of layers, free of interlayer separation and long in service life.
The invention also aims to provide a preparation method of the flame-retardant corrugated paper, which has the advantages of convenient operation and control, high production efficiency, low production cost and suitability for large-scale industrial production, and the prepared corrugated paper has excellent flame retardant property and stable quality.
The purpose of the invention is realized by the following technical scheme: the utility model provides a fire-retardant corrugated paper, includes first face ply, wavy core ply and the second face ply that from top to bottom sets gradually, first face ply and second face ply all pass through gluing agent and the bonding of wavy core ply, the upper surface on first face ply and the lower surface on second face ply have flame retardant coating all coated.
Further, the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material comprises the following raw materials in parts by weight: 50-65 parts of phenolic resin, 11-15 parts of styrene-butadiene rubber, 6-12 parts of ethylene propylene diene monomer, 5-10 parts of methyl vinyl polysiloxane resin, 5-10 parts of nano silicon dioxide, 10-16 parts of first composite flame retardant, 2-4 parts of alkyl sodium sulfonate, 4-8 parts of melamine, 2-4 parts of sucrose ricinoleate, 3-5 parts of curing agent and 15-20 parts of ethanol.
According to the invention, the phenolic resin, the styrene-butadiene rubber, the ethylene propylene diene monomer, the melamine and the methyl vinyl polysiloxane resin are compounded and matched with other raw materials, so that the prepared flame-retardant composite material has good softness and toughness, can improve the softness and toughness of corrugated paper, and has better comprehensive properties such as impact resistance, bending strength and the like; the phenolic resin has good acid resistance, mechanical property and high temperature resistance, and is matched with styrene butadiene rubber, ethylene propylene diene monomer rubber and melamine, so that the wear resistance and the mechanical property of the flame-retardant composite material are improved; the methyl vinyl polysiloxane resin has a longer main chain and large intermolecular force, and can effectively improve the mechanical properties of the flame-retardant composite material, such as strength, toughness, impact resistance and the like; the styrene butadiene rubber has excellent wear resistance and low cost, and the prepared flame-retardant composite material has high strength and high flame retardance by being matched with other raw materials, and can be quickly self-extinguished after being away from fire; the sodium alkyl sulfonate can promote the flame-retardant composite material and improve the flame-retardant effect and the mechanical property of the corrugated paper; the cane sugar ricinoleic acid ester has high bonding strength with corrugated paper, can improve the moisture resistance of the corrugated paper, can obviously improve the fluidity of the adhesive, and is convenient for the gluing of the adhesive. The nano silicon dioxide has good dispersibility in the system, and can improve the ageing resistance, strength, wear resistance and chemical resistance of the flame-retardant composite material.
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 flame retardant 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, styrene butadiene rubber and ethylene propylene diene monomer in the flame-retardant composite material, 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 better flame retardant property, has the characteristics of no toxicity and small smoke generation amount, has good compatibility with phenolic resin, styrene butadiene rubber and ethylene propylene diene monomer rubber in the flame retardant 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 a mixture of dodecenyl succinic anhydride, polyazelaic anhydride and m-xylylenediamine in a weight ratio of 1 (2-3) to (1-2).
According to the curing agent disclosed by the invention, the dodecenyl succinic anhydride, the polyazelaic anhydride and the m-xylylenediamine compound are compounded and mixed according to a certain proportion, so that the curing efficiency and effect of the adhesive can be obviously improved, and the adhesive has good performances such as impact resistance and thermal stability; the dodecenyl succinic anhydride and the polyazelaic anhydride adopted have good compatibility with phenolic resin, ethylene propylene diene monomer rubber and methyl vinyl polysiloxane resin, and can improve the toughness and the thermal shock resistance of the adhesive layer, so that the prepared corrugated paper has good toughness, bending strength and impact strength; the m-xylylenediamine can enable the adhesive to have better curing efficiency at a lower temperature, so that the prepared adhesive layer has good toughness and heat resistance.
Further, the preparation method of the flame-retardant composite material comprises the following steps:
adding phenolic resin into ethanol, uniformly mixing, adding nano silicon dioxide, uniformly stirring, then adding styrene butadiene rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate, sucrose ricinoleate and melamine, stirring for 10-15min, then adding a curing agent, and uniformly stirring to obtain the flame-retardant composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 30-35 parts of oxidized starch, 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 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 wavy core paper layer, the first surface paper layer and the second surface paper layer are stably bonded, the flame-retardant corrugated paper has good adhesive strength, the corrugated paper 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 a 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 first face paper layer, the wavy core paper layer and the second face 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 purpose of the invention is realized by the following technical scheme: a preparation method of flame-retardant corrugated paper comprises the following steps:
(1) coating a flame-retardant composite material on the upper surface of the first face paper layer and the lower surface of the second face paper layer;
(2) taking a wavy core paper layer, and coating adhesives on the upper surface and the lower surface of the wavy core paper layer;
(3) and respectively pressing a first surface paper layer and a second surface paper layer on the upper surface and the lower surface of the wavy core paper layer, drying and cooling to obtain the flame-retardant corrugated paper.
Further, in the step (1), the glue application amount of the flame-retardant composite material coated on the upper surface of the first face paper layer and the lower surface of the second face paper layer is 20-30g/m2(ii) a In the step (2), the glue application amount of the adhesive coated on the upper surface and the lower surface of the wavy core paper layer is 15-20g/m2。
Further, the step (3) is specifically that the first surface paper layer and the second surface paper layer are respectively attached to the upper surface and the lower surface of the wavy core paper layer, and the first surface paper layer and the second surface paper layer are subjected to hot pressing for 15-25s under the conditions that the temperature is 120-. Further, hot air drying is adopted after hot pressing, and the drying temperature is 50-70 ℃.
The corrugated paper is prepared by the steps, so that the operation and control are convenient, the production efficiency is high, the production cost is low, the corrugated paper is suitable for large-scale industrial production, the gluing amount of each layer is strictly controlled, the hot-pressing temperature and time are strictly controlled, each glue can be uniformly spread on the surface, the glue is easy to cure, each layer of the prepared corrugated paper is stably bonded, the phenomenon of interlayer separation is avoided, the quality is stable, and the corrugated paper has better toughness and ring crush strength.
The invention has the beneficial effects that: the corrugated paper has excellent flame retardant property, mechanical property and ageing resistance, each layer is bonded stably, the phenomenon of interlayer separation is avoided, and the service life is long.
The preparation method of the corrugated paper is convenient to operate and control, high in production efficiency, low in production cost and suitable for large-scale industrial production, and the prepared corrugated paper is stable in quality and has excellent flame retardant property.
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 fire-retardant corrugated paper, including first face paper layer, wavy core paper layer and the second face paper layer that from top to bottom sets gradually, first face paper layer and second face paper layer all bond with wavy core paper layer through gluing agent, the upper surface of first face paper layer and the lower surface of second face paper layer all coat and have fire-retardant layer.
Further, the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material comprises the following raw materials in parts by weight: 60 parts of phenolic resin, 13 parts of styrene-butadiene rubber, 10 parts of ethylene propylene diene monomer, 7 parts of methyl vinyl polysiloxane resin, 7 parts of nano silicon dioxide, 12 parts of first composite flame retardant, 3 parts of alkyl sodium sulfonate, 6 parts of melamine, 3 parts of sucrose ricinoleate, 4 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 curing agent is a mixture of dodecenyl succinic anhydride, polyazelaic anhydride and m-xylylenediamine in a weight ratio of 1:2.5: 1.5.
Further, the preparation method of the flame-retardant composite material comprises the following steps:
adding phenolic resin into ethanol, uniformly mixing, adding nano silicon dioxide, uniformly stirring, then adding styrene butadiene rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate, sucrose ricinoleate and melamine, stirring for 12min, adding a curing agent, and uniformly stirring to obtain the flame-retardant composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 32 parts of oxidized starch, 4 parts of 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 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.
Furthermore, the oxidized starch is prepared by oxidizing wheat starch and corn starch in a mass ratio of 1:2.
The embodiment also provides a preparation method of the flame-retardant corrugated paper, which comprises the following steps:
(1) coating a flame-retardant composite material on the upper surface of the first face paper layer and the lower surface of the second face paper layer;
(2) taking a wavy core paper layer, and coating adhesives on the upper surface and the lower surface of the wavy core paper layer;
(3) and respectively pressing a first surface paper layer and a second surface paper layer on the upper surface and the lower surface of the wavy core paper layer, drying and cooling to obtain the flame-retardant corrugated paper.
Further, in the step (1), the glue application amount of the flame-retardant composite material coated on the upper surface of the first face paper layer and the lower surface of the second face paper layer is 25g/m2(ii) a In the step (2), the glue application amount of the adhesive coated on the upper surface and the lower surface of the wavy core paper layer is 18g/m2。
Further, the step (3) is specifically that a first surface paper layer and a second surface paper layer are respectively attached to the upper surface and the lower surface of the wavy core paper layer, hot-pressing is carried out for 20s under the conditions that the temperature is 130 ℃ and the pressure is O.5MPa, and the flame-retardant corrugated paper is prepared after drying and cooling. Further, hot air drying is adopted after hot pressing, and the drying temperature is 60 ℃.
Example 2
In this embodiment, the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material includes the following raw materials in parts by weight: 50 parts of phenolic resin, 11 parts of styrene-butadiene rubber, 6 parts of ethylene propylene diene monomer, 5 parts of methyl vinyl polysiloxane resin, 5 parts of nano silicon dioxide, 10 parts of first composite flame retardant, 2 parts of alkyl sodium sulfonate, 4 parts of melamine, 2 parts of sucrose ricinoleate, 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.
Further, the preparation method of the flame-retardant composite material comprises the following steps:
adding phenolic resin into ethanol, uniformly mixing, adding nano silicon dioxide, uniformly stirring, then adding styrene butadiene rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate, sucrose ricinoleate and melamine, stirring for 10min, adding a curing agent, and uniformly stirring to obtain the flame-retardant composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 30 parts of oxidized starch, 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.
Further, the curing agent is a mixture of dodecenyl succinic anhydride, polyazelaic anhydride and m-xylylenediamine in a weight ratio of 1:2: 1.
The embodiment also provides a preparation method of the flame-retardant corrugated paper, which comprises the following steps:
(1) coating a flame-retardant composite material on the upper surface of the first face paper layer and the lower surface of the second face paper layer;
(2) taking a wavy core paper layer, and coating adhesives on the upper surface and the lower surface of the wavy core paper layer;
(3) and respectively pressing a first surface paper layer and a second surface paper layer on the upper surface and the lower surface of the wavy core paper layer, drying and cooling to obtain the flame-retardant corrugated paper.
Further, in the step (1), the glue application amount of the flame-retardant composite material coated on the upper surface of the first face paper layer and the lower surface of the second face paper layer is 20g/m2(ii) a In the step (2), the glue application amount of the adhesive coated on the upper surface and the lower surface of the wavy core paper layer is 20/m2。
Further, the step (3) is specifically that a first surface paper layer and a second surface paper layer are respectively attached to the upper surface and the lower surface of the wavy core paper layer, hot pressing is carried out for 25s under the conditions that the temperature is 120 ℃ and the pressure is 0.6MPa, the flame-retardant corrugated paper is further prepared after drying and cooling, hot air drying is adopted after hot pressing, and the drying temperature is 50 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 3
In this embodiment, the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material includes the following raw materials in parts by weight: 65 parts of phenolic resin, 15 parts of styrene-butadiene rubber, 12 parts of ethylene propylene diene monomer, 10 parts of methyl vinyl polysiloxane resin, 10 parts of nano silicon dioxide, 16 parts of first composite flame retardant, 4 parts of alkyl sodium sulfonate, 8 parts of melamine, 4 parts of sucrose ricinoleate, 5 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 a mixture of dodecenyl succinic anhydride, polyazelaic anhydride and m-xylylenediamine in a weight ratio of 1:3: 2.
Further, the preparation method of the flame-retardant composite material comprises the following steps:
adding phenolic resin into ethanol, uniformly mixing, adding nano silicon dioxide, uniformly stirring, then adding styrene butadiene rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate, sucrose ricinoleate and melamine, stirring for 15min, adding a curing agent, and uniformly stirring to obtain the flame-retardant composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 35 parts of oxidized starch, 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.
The embodiment also provides a preparation method of the flame-retardant corrugated paper, which comprises the following steps:
(1) coating a flame-retardant composite material on the upper surface of the first face paper layer and the lower surface of the second face paper layer;
(2) taking a wavy core paper layer, and coating adhesives on the upper surface and the lower surface of the wavy core paper layer;
(3) and respectively pressing a first surface paper layer and a second surface paper layer on the upper surface and the lower surface of the wavy core paper layer, drying and cooling to obtain the flame-retardant corrugated paper.
Further, in the step (1), the upper surface of the first face paper layer and the lower surface of the second face paper layer are arrangedThe glue application amount of the surface coating flame-retardant composite material is 30g/m2(ii) a In the step (2), the glue application amount of the adhesive coated on the upper surface and the lower surface of the wavy core paper layer is 15g/m2。
Further, the step (3) is specifically that a first surface paper layer and a second surface paper layer are respectively attached to the upper surface and the lower surface of the wavy core paper layer, hot-pressing is carried out for 15s under the conditions that the temperature is 140 ℃ and the pressure is O.4MPa, and the flame-retardant corrugated paper is prepared after drying and cooling. Further, hot air drying is adopted after hot pressing, and the drying temperature is 70 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 4
In this embodiment, the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material includes the following raw materials in parts by weight: 55 parts of phenolic resin, 12 parts of butadiene styrene rubber, 10 parts of ethylene propylene diene monomer, 6 parts of methyl vinyl polysiloxane resin, 9 parts of nano silicon dioxide, 15 parts of first composite flame retardant, 2.5 parts of alkyl sodium sulfonate, 5 parts of melamine, 3 parts of sucrose ricinoleate, 4.5 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 a mixture of dodecenyl succinic anhydride, polyazelaic anhydride and m-xylylenediamine in a weight ratio of 1:2.5: 2.
Further, the preparation method of the flame-retardant composite material comprises the following steps:
adding phenolic resin into ethanol, uniformly mixing, adding nano silicon dioxide, uniformly stirring, then adding styrene butadiene rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate, sucrose ricinoleate and melamine, stirring for 14min, adding a curing agent, and uniformly stirring to obtain the flame-retardant composite material.
Further, the adhesive comprises the following raw materials in parts by weight: 34 parts of oxidized starch, 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, 6 parts of vinyl acetate-ethylene copolymer emulsion and 45 parts of water.
Furthermore, the oxidized starch is prepared by oxidizing corn starch.
The invention also provides a preparation method of the flame-retardant corrugated paper, which comprises the following steps:
(1) coating a flame-retardant composite material on the upper surface of the first face paper layer and the lower surface of the second face paper layer;
(2) taking a wavy core paper layer, and coating adhesives on the upper surface and the lower surface of the wavy core paper layer;
(3) and respectively pressing a first surface paper layer and a second surface paper layer on the upper surface and the lower surface of the wavy core paper layer, drying and cooling to obtain the flame-retardant corrugated paper.
Further, in the step (1), the glue application amount of the flame-retardant composite material coated on the upper surface of the first face paper layer and the lower surface of the second face paper layer is 28g/m2(ii) a In the step (2), the glue application amount of the adhesive coated on the upper surface and the lower surface of the wavy core paper layer is 16g/m2。
Further, the step (3) is specifically that a first surface paper layer and a second surface paper layer are respectively attached to the upper surface and the lower surface of the wavy core paper layer, hot-pressing is carried out for 18s under the conditions that the temperature is 125 ℃ and the pressure is O.45MPa, and the flame-retardant corrugated paper is prepared after drying and cooling. Further, the curing temperature was 115 ℃ and the curing time was 3 min.
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 above in that:
the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material comprises the following raw materials in parts by weight: 60 parts of phenolic resin, 13 parts of styrene-butadiene rubber, 10 parts of ethylene propylene diene monomer, 7 parts of methyl vinyl polysiloxane resin, 7 parts of nano silicon dioxide, 6 parts of melamine, 3 parts of sucrose ricinoleate 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 2
This comparative example differs from example 1 above in that:
the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material comprises the following raw materials in parts by weight: 77 parts of phenolic resin, 13 parts of styrene butadiene rubber, 7 parts of nano silicon dioxide 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 and 45 parts of water.
The remainder of this comparative example is the same as example 1 and will not be described again here.
Corrugated paper was prepared using examples 1-4 and comparative examples 1-2 such that the corrugated paper had a thickness of 10mm and a grammage of 100-2And performing performance tests such as vertical burning grade, ageing resistance, ring crush strength and the like, wherein the test results are as follows:
according to the detection of the adhesive strength in GB/T6541-2011, the adhesive strength of the adhesives in the examples 1-4 is 700-. Therefore, the adhesive disclosed by the invention can ensure that the flame-retardant corrugated paper has good bonding strength, the edges are not easy to come unstuck and warp, and the practicability is good.
As can be seen from the above table, the corrugated paper prepared in the embodiments 1 to 4 of the present invention has excellent flame retardant property, mechanical property and aging resistance, each layer is bonded stably, no interlayer separation occurs, and the service life is long.
The preparation method of the corrugated paper is convenient to operate and control, high in production efficiency, low in production cost and suitable for large-scale industrial production, and the prepared corrugated paper is stable in quality and has excellent flame retardant property.
Compared with the example 1, the flame-retardant composite material does not contain the first composite flame retardant and the alkyl sodium sulfonate, and the flame-retardant effect and the ring crush strength of the prepared corrugated paper are lower than those of the example 1, which shows that the flame-retardant effect and the ring crush strength of the corrugated paper can be improved by matching the first composite flame retardant and the alkyl sodium sulfonate.
Compared with the embodiment 1, the flame-retardant composite material does not contain ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate and sucrose ricinoleate, and the flame-retardant effect and the ring crush strength of the prepared corrugated paper are lower than those of the embodiment 1, which shows that the flame-retardant effect and the ring crush strength of the corrugated paper can be remarkably improved by compounding the ethylene propylene diene monomer, the methyl vinyl polysiloxane resin, the first composite flame retardant, the sodium alkyl sulfonate and the sucrose ricinoleate and matching with other raw materials.
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 flame retardant effect, the ring crush strength and the aging resistance of the prepared corrugated paper are all 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 flame-retardant corrugated paper is characterized in that: including first face ply, wave form core paper layer and the second face ply that from top to bottom sets gradually, first face ply and second face ply all bond with wave form core paper layer through gluing agent, the upper surface of first face ply and the lower surface of second face ply have fire-retardant layer all coated.
2. The flame-retardant corrugated paper as defined in claim 1, wherein: the flame-retardant layer is made of a flame-retardant composite material, and the flame-retardant composite material comprises the following raw materials in parts by weight: 50-65 parts of phenolic resin, 11-15 parts of styrene-butadiene rubber, 6-12 parts of ethylene propylene diene monomer, 5-10 parts of methyl vinyl polysiloxane resin, 5-10 parts of nano silicon dioxide, 10-16 parts of first composite flame retardant, 2-4 parts of alkyl sodium sulfonate, 4-8 parts of melamine, 2-4 parts of sucrose ricinoleate, 3-5 parts of curing agent and 15-20 parts of ethanol.
3. The flame-retardant corrugated paper as defined in claim 2, 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.
4. The flame-retardant corrugated paper as defined in claim 2, wherein: the curing agent is a mixture of dodecenyl succinic anhydride, polyazelaic anhydride and m-xylylenediamine in a weight ratio of 1 (2-3) to 1-2.
5. The flame-retardant corrugated paper as defined in claim 2, wherein: the preparation method of the flame-retardant composite material comprises the following steps:
adding phenolic resin into ethanol, uniformly mixing, adding nano silicon dioxide, uniformly stirring, then adding styrene butadiene rubber, ethylene propylene diene monomer, methyl vinyl polysiloxane resin, a first composite flame retardant, sodium alkyl sulfonate, sucrose ricinoleate and melamine, stirring for 10-15min, then adding a curing agent, and uniformly stirring to obtain the flame-retardant composite material.
6. The flame-retardant corrugated paper as defined in claim 1, wherein: the adhesive comprises the following raw materials in parts by weight: 30-35 parts of oxidized starch, 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.
7. The flame-retardant corrugated paper as defined in claim 6, wherein: the oxidized starch is prepared by oxidizing at least one of wheat starch, corn starch and cassava starch.
8. A method of making the flame retardant corrugated paper of any one of claims 1-7, wherein: the method comprises the following steps:
(1) coating a flame-retardant composite material on the upper surface of the first face paper layer and the lower surface of the second face paper layer;
(2) taking a wavy core paper layer, and coating adhesives on the upper surface and the lower surface of the wavy core paper layer;
(3) and respectively pressing a first surface paper layer and a second surface paper layer on the upper surface and the lower surface of the wavy core paper layer, drying and cooling to obtain the flame-retardant corrugated paper.
9. The method for preparing the flame-retardant corrugated paper as claimed in any one of claims 8, wherein: in the step (1), the glue application amount of the flame-retardant composite material coated on the upper surface of the first face paper layer and the lower surface of the second face paper layer is 20-30g/m2(ii) a In the step (2), the glue application amount of the adhesive coated on the upper surface and the lower surface of the wavy core paper layer is 15-20g/m2。
10. The method for preparing the flame-retardant corrugated paper as claimed in any one of claims 8, wherein: the step (3) is specifically that a first surface paper layer and a second surface paper layer are respectively attached to the upper surface and the lower surface of the wavy core paper layer, hot-pressing is carried out for 15-25s under the conditions that the temperature is 120-140 ℃ and the pressure is O.4-0.6MPa, and the flame-retardant corrugated paper is prepared after drying and cooling.
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| CN116397461A (en) * | 2023-04-17 | 2023-07-07 | 宿迁科佳环保科技有限公司 | Waterproof flame-retardant composite corrugated board and composite technology thereof |
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