CN114960296A - Packaging paperboard with high surface strength and preparation method thereof - Google Patents

Packaging paperboard with high surface strength and preparation method thereof Download PDF

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Publication number
CN114960296A
CN114960296A CN202210431872.8A CN202210431872A CN114960296A CN 114960296 A CN114960296 A CN 114960296A CN 202210431872 A CN202210431872 A CN 202210431872A CN 114960296 A CN114960296 A CN 114960296A
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CN
China
Prior art keywords
parts
layer
packaging paperboard
paperboard
raw materials
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Application number
CN202210431872.8A
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Chinese (zh)
Inventor
徐天平
王朝晖
王银磊
闫继芳
周甜
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Beijing Jinyinlian International Supply Chain Management Co ltd
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Beijing Jinyinlian International Supply Chain Management Co ltd
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Priority to CN202210431872.8A priority Critical patent/CN114960296A/en
Publication of CN114960296A publication Critical patent/CN114960296A/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • 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
    • 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
    • D21H17/29—Starch cationic
    • 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
    • D21H17/47—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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • 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
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/24—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H21/18—Reinforcing agents
    • D21H21/20—Wet strength 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/26—All layers being made of paper or paperboard
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

The application relates to the technical field of papermaking, and particularly discloses a high-surface-strength packaging paperboard and a preparation method thereof, wherein the high-surface-strength packaging paperboard consists of a surface layer, a core layer and a bottom layer from top to bottom, and the outer surfaces of the surface layer and the bottom layer are coated with a sizing layer; the surface layer comprises the following raw materials in parts by weight: 60-70 parts of bleached hardwood pulp, 20-30 parts of calcium carbonate, 0.5-1.5 parts of cationic starch, 0.1-0.5 part of carboxymethyl cellulose, 0.3-0.5 part of melamine formaldehyde resin and 1-2 parts of polyacrylamide. The tensile strength, the bursting index, the ring crush strength and the stiffness of the packaging paperboard are respectively 52.3N.m/g, 3.94 KPa.m 2/g, 12.90N.m/g and 5.65mN.m at most, so that the surface strength of the packaging paperboard is improved.

Description

Packaging paperboard with high surface strength and preparation method thereof
Technical Field
The application relates to the technical field of papermaking, in particular to a packaging paperboard with high surface strength and a preparation method thereof.
Background
The packaging paperboard is a general name of thick paper with the constant weight of more than 120g per square meter and between paper and paperboard, has fine and smooth paper surface, is stiff and wear-resistant, and is widely applied to the field of packaging of postcards, cards, album paper and the like.
Along with the social development and the continuous improvement of the living standard of people, the performance requirement of people on the packaging paperboard is gradually improved, in order to ensure that the packaging paperboard has good printing effect and vivid patterns, the surface of the packaging paperboard is generally glued, oxidized starch is used as a sizing agent, but the oxidized starch is negative, the affinity of the oxidized starch with fibers is poor, the surface strength of the packaging paperboard is low, and the surface of the packaging paperboard is easy to generate indentation or burst in the using process.
Disclosure of Invention
In order to improve the surface strength of the packaging paperboard, the application provides the packaging paperboard with high surface strength and a preparation method thereof.
In a first aspect, the present application provides a packaging paperboard with high surface strength, which adopts the following technical scheme:
the packaging paperboard with high surface strength comprises a surface layer, a core layer and a bottom layer from top to bottom, wherein the outer surfaces of the surface layer and the bottom layer are coated with sizing layers; the surface layer comprises the following raw materials in parts by weight: 60-70 parts of bleached hardwood pulp, 20-30 parts of calcium carbonate, 0.5-1.5 parts of cationic starch, 0.1-0.5 part of carboxymethyl cellulose, 0.3-0.5 part of melamine formaldehyde resin and 1-2 parts of polyacrylamide.
The surface layer raw materials of the packaging paperboard are 60-70 parts of bleached hardwood pulp, 20-30 parts of calcium carbonate, 0.5-1.5 parts of cationic starch, 0.1-0.5 part of carboxymethyl cellulose, 0.3-0.5 part of melamine formaldehyde resin and 1-2 parts of polyacrylamide, all performances of the packaging paperboard can be expected, and the packaging paperboard is optimal in effect due to the fact that 65 parts of bleached hardwood pulp, 25 parts of calcium carbonate, 1 part of cationic starch, 0.8 part of carboxymethyl cellulose, 0.4 part of melamine formaldehyde resin and 1.5 parts of polyacrylamide are selected.
Through adopting above-mentioned technical scheme, by the packaging card paper that surface course, sandwich layer and bottom constitute, and at surface coating glueing layer, improve packaging card paper's surface strength.
The bleached hardwood pulp with higher strength is used as the main raw material of the surface layer, so that the filler retention rate of the raw material of the surface layer can be improved, and the surface strength of the packaging paperboard is improved. Calcium carbonate is added as a filler, paper made of mutually interwoven fibers has a plurality of gaps, and the filler is added for color filling, so that the flexibility is improved, and the durability of the packaging paperboard can be obviously improved. The cationic starch is added as a dry strength agent, and the fibers and the fillers with negative electricity can be adsorbed by the cations with integral points and are irreversibly adsorbed, so that the fibers and the fillers are uniformly and tightly arranged, and the surface strength of the packaging paperboard can be greatly improved. The carboxymethyl cellulose has strong permeability, is easy to permeate into paper fibers, improves the pulping efficiency, promotes the refining of the fibers, shortens the pulping time, adjusts the potential in pulp, uniformly disperses the fibers, increases the bonding force among the fibers, and improves the tensile strength, the flexibility and the compression fracture resistance of the packaging paperboard.
The melamine formaldehyde resin is added as a wet strength agent, so that the wet strength of the packaging paperboard is improved, and the dry strength indexes such as the breaking length, the bursting strength, the folding strength and the like of the packaging paperboard and the sizing degree are improved while the wet strength is improved. The polyacrylamide has good adsorption performance and hydrogen bonding, can improve the bonding capacity between fibers, and further improves the surface strength of the packaging paperboard.
Preferably, the method comprises the following steps: the surface layer comprises the following raw materials in parts by weight: 64-68 parts of bleached hardwood pulp, 24-28 parts of calcium carbonate, 0.8-1.2 parts of cationic starch, 0.2-0.4 part of carboxymethyl cellulose, 0.35-0.45 part of melamine formaldehyde resin and 1.4-1.8 parts of polyacrylamide.
Preferably, the method comprises the following steps: the surface layer also comprises the following raw materials in parts by weight: 1-2 parts of rosin size and 1-2 parts of nano cellulose.
By adopting the technical scheme, the rosin size is low in viscosity and good in stability, gaps among raw materials can be filled, the contact angle of fibers to fluid is increased, and the surface strength and the internal bonding strength of the packaging paperboard are further improved. The nano-cellulose has larger specific surface area, can be tightly combined with fibers in paper pulp by adding the nano-cellulose into the surface layer, improves the binding force among the paper pulp fibers, and can obviously improve the tensile strength of the packaging paperboard.
Preferably, the method comprises the following steps: the melamine formaldehyde resin is obtained by cationic modification of acrylamide.
By adopting the technical scheme, the melamine formaldehyde resin is subjected to cationic modification through acrylamide, so that the content of free formaldehyde in the resin can be reduced, the melamine formaldehyde resin has higher water solubility and stability, and the wet strength and the wet friction resistance of the packaging paperboard are improved.
Preferably, the method comprises the following steps: the specific operation of the melamine formaldehyde resin modification is as follows: adding acrylamide and potassium persulfate into melamine formaldehyde resin, mixing, heating to 80 ℃, keeping the temperature, reacting for 1-2h, adjusting the pH value to 9.5, and cooling to obtain modified melamine formaldehyde resin; the weight ratio of the acrylamide to the melamine formaldehyde resin is 1: (7-9); the weight ratio of the potassium persulfate to the melamine formaldehyde resin is 1: (7-9).
By adopting the technical scheme, potassium persulfate is added as an initiator to initiate double bond polymerization in acrylamide, so that the length of a flexible chain is increased, the toughness and mechanical property of the melamine formaldehyde resin are improved, and the brittleness is reduced.
Preferably, the method comprises the following steps: the sizing layer comprises the following raw materials in parts by weight: 10-20 parts of chitosan, 3-5 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of styrene acrylic acid (SAE) surface sizing agent, 1-3 parts of aluminum sulfate and 0.01-0.03 part of defoaming agent.
The glue applying layer is prepared from 10-20 parts of chitosan, 3-5 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of styrene acrylic acid (SAE) surface sizing agent, 1-3 parts of aluminum sulfate and 0.01-0.03 part of defoaming agent, the performances of the packaging paperboard can be expected, and the best effect is achieved by 15 parts of chitosan, 4 parts of fatty alcohol-polyoxyethylene ether, 2 parts of styrene acrylic acid (SAE) surface sizing agent, 2 parts of aluminum sulfate and 0.02 part of defoaming agent.
By adopting the technical scheme, the chitosan has good film forming property, can be connected with paper fibers through hydrogen bonds, and can improve the surface sizing effect by adding the chitosan, enhance the surface strength of the packaging paperboard and simultaneously reduce the Cobb value of the packaging paperboard. The addition of the fatty alcohol-polyoxyethylene ether can improve the solubility of the chitosan in water, and simultaneously, the chitosan can form a hydrogen bond effect with hydroxyl of the paper surface fiber due to the large amount of polar groups, so that the surface strength of the packaging paperboard is further improved.
The surface sizing agent of styrene acrylic acid (SAE) can make the surface of the packaging paperboard smooth and fine, and the surface sizing agent can permeate into gaps of paper fibers, thereby increasing the bonding strength, stiffness, tensile strength, folding resistance and surface strength among the fibers in the paper and improving the stability of the paper.
Adding aluminum sulfate to adjust the pH value, so that the sizing layer raw material is acidic, and the water resistance of the packaging paperboard is improved; on the other hand, the stiffness and the glossiness of the packaging paperboard can be improved. The addition of the defoaming agent can eliminate the air bubbles in the sizing layer and the raw materials in the processing process,
preferably, the method comprises the following steps: the sizing layer also comprises the following raw materials in parts by weight: 1-3 parts of lecithin and 0.5-1 part of sodium dodecyl benzene sulfonate.
By adopting the technical scheme, the lecithin and the sodium dodecyl benzene sulfonate are mixed and added, so that a single-layer liposome with uniform size can be formed, and the surface strength of paper is improved.
Preferably, the method comprises the following steps: the sizing layer also comprises 30-50 parts by weight of polyaluminium chloride.
By adopting the technical scheme, the polymeric aluminum oxide is added as a flocculating agent, has a large amount of positive charges and a stable form, can ensure that suspended substances in the sizing layer are neutralized by electricity to play a role in precipitation, improve the effect of the sizing layer and enhance the tensile strength and the surface smoothness of the packaging paperboard.
Preferably, the method comprises the following steps: the core layer and the bottom layer comprise the following raw materials in parts by weight: 95-100 parts of bleached hardwood pulp, 20-30 parts of bleached softwood pulp and 1-2 parts of polyacrylamide.
The core layer and the bottom layer are made of 95-100 parts of bleached hardwood pulp, 20-30 parts of bleached softwood pulp and 1-2 parts of polyacrylamide, all performances of the packaging paperboard can be expected, and the packaging paperboard is optimal in effect due to 98 parts of bleached hardwood pulp, 25 parts of bleached softwood pulp and 1.5 parts of polyacrylamide.
Through adopting above-mentioned technical scheme, the fibre of bleaching hardwood pulp is shorter, and the fibre of bleaching softwood pulp is longer, and both mix and add, improve the pliability and the deflection of packaging card paper. The polyacrylamide has good adsorption performance and hydrogen bonding, can improve the bonding capacity between fibers, and further improves the surface strength of the packaging paperboard.
In a second aspect, the present application provides a method for preparing a packaging paperboard with high surface strength, which is specifically realized by the following technical scheme:
a preparation method of a packaging paperboard with high surface strength comprises the following operation steps:
respectively mixing raw materials of a surface layer, a core layer and a bottom layer, disintegrating and grinding the raw materials into pulp to obtain pulp, spraying the pulp onto a net, dehydrating and molding the pulp, spraying starch, compounding the bottom layer on the lower surface of the core layer, and compounding the surface layer on the upper surface of the core layer to obtain base paper;
mixing the raw materials of the sizing layer, and uniformly stirring to obtain a sizing agent for later use;
and pressing and dehydrating the base paper shoe, drying, coating a sizing agent on the surface of the base paper shoe, drying, pressing and rolling to obtain the packaging paperboard.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) the tensile strength, the bursting index, the ring crush strength and the stiffness of the packaging paperboard are respectively 42.5N.m/g, 2.96 KPa.m 2/g, 8.36N.m/g and 5.47mN.m to the maximum by controlling the types and the mixing amount of various raw materials of the surface layer of the packaging paperboard, so that the surface strength of the packaging paperboard is improved.
(2) According to the application, the rosin gum and the nano-cellulose are added into the surface layer raw material, so that the tensile strength, the burst index, the ring crush strength and the stiffness of the packaging paperboard are respectively 44.0N.m/g, 3.16 KPa.m 2/g, 9.45N.m/g and 5.52mN.m at most, and the surface strength of the packaging paperboard is further improved.
(3) According to the application, the melamine formaldehyde resin in the surface layer is subjected to cation modification, so that the highest tensile strength, bursting index, ring crush strength and stiffness of the packaging paperboard are 44.2N.m/g, 3.28 KPa.m 2/g, 9.48N.m/g and 5.56mN.m respectively, and the surface strength of the packaging paperboard is improved.
(4) According to the application, the types and the mixing amount of the raw materials of the sizing layer are controlled, so that the tensile strength, the burst index, the ring crush strength and the stiffness are respectively 47.9N.m/g, 3.47 KPa.m 2/g, 9.61N.m/g and 5.60mN.m to the maximum, and the surface strength of the packaging paperboard is improved.
(5) According to the application, lecithin, sodium dodecyl benzene sulfonate and polymeric alumina are added into the sizing layer raw materials, so that the tensile strength, the burst index, the ring crush strength and the stiffness of the packaging paperboard are respectively 52.3N.m/g, 3.94 KPa.m 2/g, 12.90N.m/g and 5.65mN.m at most, and the surface strength of the packaging paperboard is further improved.
Detailed Description
The present application will be described in further detail with reference to specific examples.
The following raw materials are all commercially available products, and are not to be construed as limiting the sources of the raw materials, as they are fully disclosed in the present application. The method comprises the following specific steps: bleached hardwood pulp with whiteness of 86, a good number of YKDHFL and fiber length of 2.5 mm; calcium carbonate with a particle size of 325 mesh; carboxymethyl cellulose, the content of active substances is 86 percent; melamine formaldehyde resin with the grain diameter of 80 meshes; polyacrylamide with molecular weight of 500-2000 ten thousand; the rosin size, the content of active substance is 40%, model number DN 312; nano-cellulose with a particle size of 10-50 nm; acrylamide with the grain diameter of 40-50 meshes; fatty alcohol polyoxyethylene ether, the model is AEP-9; the styrene acrylic acid (SAE) surface sizing agent has the dynamic viscosity of less than or equal to 50 mPa.s; a defoaming agent, namely a styrene-butadiene latex defoaming agent with the model number of 1083; bleaching softwood pulp, wherein the whiteness is 60 and the fiber length is 2.3 mm; the content of effective substances in the polyaluminum chloride is 26 percent.
Example 1
The high surface strength package paperboard of example 1 is obtained by the following steps:
according to the mixing amount shown in the table 1, mixing bleached hardwood pulp, calcium carbonate, cationic starch, carboxymethyl cellulose, melamine formaldehyde resin and polyacrylamide, disintegrating and pulping to obtain pulp, spraying to net, dehydrating and molding, and spraying starch to obtain a surface layer; mixing bleached hardwood pulp and polyacrylamide according to the mixing amount shown in the table 2, disintegrating and pulping to obtain pulp, spraying to net, dehydrating and molding, and spraying starch to obtain a core layer;
mixing bleached hardwood pulp and polyacrylamide, disintegrating and pulping to obtain pulp, spraying to net, dehydrating and molding, and spraying starch to obtain a bottom layer;
compounding the bottom layer on the lower surface of the core layer, and compounding the surface layer on the upper surface of the core layer to obtain base paper;
and pressing and dehydrating the base paper shoe, drying, coating a styrene acrylic acid (SAE) surface sizing agent on the surface, drying, pressing and rolling to obtain the packaging paperboard.
Examples 2 to 5
The preparation method and the types of the raw materials of the packaging cardboard with high surface strength of the examples 2 to 5 are the same as those of the example 1, except that the mixing amount of each raw material is different, and the details are shown in table 3.
Table 1 examples 1-5 amounts of materials for high surface strength paperboard packaging face layers
(unit: kg)
Raw materials Example 1 Example 2 Example 3 Example 4 Example 5
Bleached hardwood pulp 65 65 65 65 65
Calcium carbonate 25 25 25 25 25
Cationic starch 0.5 1 1.5 1 1
Carboxymethyl cellulose 0.1 0.1 0.1 0.3 0.5
Melamine formaldehyde resin 0.3 0.3 0.3 0.3 0.3
Polyacrylamide 1.5 1.5 1.5 1.5 1.5
Table 2 examples 1-5 blending amounts of each raw material for core and bottom layers of high surface strength packaging paperboard
(unit: kg)
Raw materials Example 1 Example 2 Example 3 Example 4 Example 5
Bleached hardwood pulp 90 90 90 90 90
Polyacrylamide 1.5 1.5 1.5 1.5 1.5
Example 6
The high surface strength packaging cardboard of example 6 was identical to the preparation method and the kinds of the raw materials of example 4, except that 25kg of bleached softwood pulp was added to the bottom and core layer raw materials, and the kinds and the blending amount of the remaining raw materials were identical to those of the example.
Examples 7 to 8
The preparation methods and the types of the raw materials of the packaging cardboard with high surface strength of the examples 7-8 are the same as those of the example 6, except that the mixing amounts of the raw materials of the surface layer are different, and the details are shown in table 3.
TABLE 3 examples 7-8 high surface Strength packaging card paper facer materials loadings
(unit: kg)
Raw materials Example 7 Example 8
Bleached hardwood pulp 65 65
Calcium carbonate 25 25
Cationic starch 1 1
Carboxymethyl cellulose 0.3 0.3
Melamine formaldehyde resin 0.4 0.5
Polyacrylamide 1.5 1.5
Examples 9 to 13
The high surface strength packaging paperboard of examples 9-13 was prepared by the same method as in example 7, except that the surface layer was further added with rosin gum and nanocellulose, and the specific amounts are shown in table 4.
TABLE 4 examples 9-13 high surface Strength packaging card paper facer materials loadings
(unit: kg)
Raw materials Example 9 Example 10 Example 11 Example 12 Example 13
Bleached hardwood pulp 65 65 65 65 65
Calcium carbonate 25 25 25 25 25
Cationic starch 1 1 1 1 1
Carboxymethyl cellulose 0.3 0.3 0.3 0.3 0.3
Melamine formaldehyde resin 0.4 0.4 0.4 0.4 0.4
Polyacrylamide 1.5 1.5 1.5 1.5 1.5
Rosin size 1 1.5 2 1.5 1.5
Nano cellulose 1 1 1 1.5 2
Example 14
The preparation method and the raw material mixing amount of the packaging cardboard with high surface strength of the example 14 are completely the same as those of the example 12, except that the melamine formaldehyde resin added in the surface layer is obtained by cationic modification through acrylamide, and the specific operation of the melamine formaldehyde resin modification is as follows: 3.2kg of acrylamide and 0.8kg of potassium persulfate were added to 0.4kg of melamine formaldehyde resin, and the mixture was heated to 80 ℃ and reacted for 2 hours while maintaining the temperature, the pH was adjusted to 9.5, and the mixture was cooled to obtain a modified melamine formaldehyde resin, and the types of other raw materials were the same as in example 12.
Examples 15 to 21
The high surface strength package paperboard of examples 15-21 was prepared exactly the same as example 14 except that the Styrene Acrylic (SAE) surface sizing agent was replaced with a compounded sizing agent prepared as follows: mixing chitosan, fatty alcohol-polyoxyethylene ether, styrene acrylic acid (SAE) surface sizing agent, aluminum sulfate and defoaming agent, and uniformly stirring to obtain the compound sizing agent, wherein the types of other raw materials are the same as those in example 11, and the specific mixing amount of each raw material of the sizing agent is shown in Table 5.
TABLE 5 examples 15-21 amounts of materials for sizing layers of high surface strength packaging card paper
(unit: kg)
Figure BDA0003611456470000071
Examples 22 to 26
The high surface strength package paperboard of examples 22-26 was prepared exactly the same as in example 20 except that the Styrene Acrylic (SAE) surface sizing agent was replaced with a compounded sizing agent prepared as follows: chitosan, fatty alcohol-polyoxyethylene ether, styrene acrylic acid (SAE) surface sizing agent, aluminum sulfate, defoaming agent, lecithin and sodium dodecyl benzene sulfonate are mixed and stirred uniformly to obtain the compound sizing agent, the types of other raw materials are the same as those in example 20, and the specific mixing amount of each raw material of the sizing agent is shown in Table 6.
TABLE 6 EXAMPLES 22-26 raw material mixing amounts of sizing layer of high surface strength packaging card paper
(unit: kg)
Figure BDA0003611456470000072
Figure BDA0003611456470000081
Examples 27 to 29
The high surface strength package paperboard of examples 27-29 was prepared exactly the same as example 25 except that the Styrene Acrylic (SAE) surface sizing agent was replaced with a compounded sizing agent prepared as follows: chitosan, fatty alcohol-polyoxyethylene ether, styrene acrylic acid (SAE) surface sizing agent, aluminum sulfate, defoaming agent, lecithin, sodium dodecyl benzene sulfonate and polymeric aluminum oxide are mixed and stirred uniformly to obtain the compound sizing agent, the types of other raw materials are the same as those in example 25, and the specific mixing amount of each raw material of the sizing agent is shown in Table 7.
TABLE 7 examples 27-29 amount of each material for sizing layer of high surface strength packaging card paper
(unit: kg)
Raw materials Example 27 Example 28 Example 29
Chitosan 15 15 15
Fatty alcohol polyoxyethylene ether 4 4 4
Styrene Acrylic (SAE) surface sizing agent 1 1 1
Aluminium sulphate 1 1 1
Defoaming agent 0.02 0.02 0.02
Lecithin 2 2 2
Sodium dodecyl benzene sulfonate 0.8 0.8 0.8
Polymeric alumina 30 40 50
Comparative example 1
The high surface strength packaging paperboard of comparative example 1 was prepared exactly the same as in example 1, except that: the surface layer material of the packaging card paper with high surface strength is not added with cationic starch, and the other materials and the mixing amount are the same as those of the embodiment 1.
Comparative example 2
The high surface strength packaging paperboard of comparative example 2 was prepared exactly the same as in example 1, except that: the surface layer material of the packaging card paper with high surface strength is not added with carboxymethyl cellulose, and the other materials and the mixing amount are the same as those of the embodiment 1.
Comparative example 3
The high surface strength packaging paperboard of comparative example 3 was prepared exactly as in example 1, except that: the melamine formaldehyde resin is replaced by urea formaldehyde resin in the same amount in the surface layer raw material of the packaging card paper with high surface strength, and the other raw materials and the mixing amount are the same as those in the embodiment 1.
Performance detection
The following test standards or methods were used to test the performance of each of examples 1-29 and comparative examples 1-3, and the results are detailed in Table 8.
Tensile strength: the tensile strength of the packaging cardboard is determined according to GB/T31110-2014 "determination of the Z-direction tensile strength of paper and board".
Burst index: the bursting index of the packaging paperboard is measured according to GB/T1539-2007 determination of paperboard bursting strength.
Ring crush strength: the ring crush strength of the packaging paperboard is tested according to GB/T2679.8-2016 "determination of ring crush strength of paper and paperboard".
Stiffness: the stiffness of the packaging paperboard is measured according to GB/T22364-2008 "measurement of bending stiffness of paper and paperboard".
Water absorption capacity: the water absorption of the packaging cardboard is determined according to GB/T1540-2002 "determination of Water absorption of paper and cardboard" Kobe method ".
TABLE 8 Performance test results for packaging paperboard of different high surface strengths
Figure BDA0003611456470000091
Figure BDA0003611456470000101
The test results in table 8 show that the package paperboard obtained in the present application has a tensile strength, a burst index, a ring crush strength and a stiffness of 52.3n.m/g, 3.94KPa m2/g, 12.90n.m/g and 5.65mn.m, respectively, at the highest; the minimum water absorption capacity of the packaging paperboard is 0.61g/m 2 And under the condition of higher waterproof performance, the surface strength of the packaging paperboard is improved.
In examples 1 to 5, the maximum tensile strength, bursting index, ring crush strength and stiffness of the packaging cardboard of example 4 were 42.4n.m/g, 2.94KPa m2/g, 8.35n.m/g and 5.45mn.m, respectively, which were higher than those of the packaging cardboards of examples 1 to 3 and 5; and the minimum water absorption capacity of the packaging paperboard in the example 6 is 0.93g/m 2 The contents of the cationic starch and the carboxymethyl cellulose in the surface layer raw materials in the embodiment 4 are more appropriate, so that the surface strength of the packaging paperboard is improved, the surface strength of the packaging paperboard is possibly related to the cationic starch which enables the fibers and the fillers to be uniformly and tightly arranged, the surface strength of the packaging paperboard can be greatly improved, the carboxymethyl cellulose is easy to permeate into the paper fibers, the pulping efficiency is improved, the fiber refining is promoted, the pulping time is shortened, the potential in pulp is adjusted, the fibers are uniformly dispersed, and the bonding force among the fibers is increased.
Combining the performance test data of example 4 and example 6, the tensile strength, bursting index, ring crush strength and stiffness of the packaging paperboard of example 6 are respectively 42.5N.m/g, 2.95 KPa.m 2/g, 8.36N.m/g and 5.46mN.m at the highest, which are higher than those of the packaging paperboard of example 4; and the minimum water absorption capacity of the packaging paperboard in the example 6 is 0.92g/m 2 The contents of the bleached softwood pulp and the bleached softwood pulp in the core layer and the bottom layer are lower than those in the packaging paperboard in example 4, which shows that the surface strength of the packaging paperboard is improved by adding the bleached softwood pulp into the core layer and the bottom layer raw materials, and the surface strength of the packaging paperboard is probably related to the fact that the bleached hardwood pulp is shorter in fiber and the bleached softwood pulp is longer in fiber.
Combining the performance test data of example 6 and examples 7-8, the bursting index and stiffness of the packaging paperboard of example 7 were found to be 2.96 KPa-m 2/g and 5.47mn.m, respectively, which are higher than those of the packaging paperboard of examples 6 and 8; and the minimum water absorption capacity of the packaging paperboard of the example 7 is 0.91g/m 2 The contents of the melamine formaldehyde resin in the surface layer raw material in example 7 are more appropriate, which indicates that the surface strength of the packaging cardboard is improved, and the surface strength of the packaging cardboard is possibly related to the wet strength of the packaging cardboard improved by the melamine formaldehyde resin, and the dry strength indexes such as the breaking length, the bursting strength and the folding strength of the packaging cardboard and the sizing degree are improved while the wet strength is improved.
Combining the performance test data of examples 9-13, the tensile strength, bursting index, ring crush strength and stiffness of the packaging paperboard of example 12 were found to be respectively 44.0N.m/g, 3.16KPa m2/g, 9.45N.m/g and 5.52mN.m at the highest, which were higher than those of the packaging paperboards of examples 9-11 and 13; and the minimum water absorption capacity of the packaging paperboard of the example 12 is 0.85g/m 2 The contents of rosin gum and nano-cellulose in the surface layer raw material are more suitable than those in the packaging paperboard of examples 9 to 11 and 13, which indicates that the surface strength of the packaging paperboard is improved, the surface layer raw material can fill the gaps between the raw materials with the rosin gum, the contact angle of the fibers to the fluid is increased, the surface strength and the internal bonding strength of the packaging paperboard are further improved, and the nano-cellulose has a larger specific surface area, can be tightly bonded with the fibers in the paper pulp and is related to the improvement of the bonding force between the paper pulp fibers when being added into the surface layer.
Combining the performance test data of example 12 and example 14, the tensile strength, burst index, ring crush strength and stiffness of the packaging paperboard of example 14 were found to be respectively 44.2n.m/g, 3.28 KPa-m 2/g, 9.48n.m/g and 5.56mn.m at the highest, which were higher than those of the packaging paperboard of example 12; and the minimum water absorption capacity of the packaging paperboard of example 14 is 0.81g/m 2 All of the surface materials are lower than those of the packaging paperboard of example 12, which shows that the surface strength of the packaging paperboard can be improved by cationic modification of melamine formaldehyde resin by using acrylamide in the surface layer raw material of example 14, and the surface strength of the packaging paperboard can be possibly improved by using acrylamide and the melamine formaldehyde resinBond polymerization, increase the length of flexible chain, improve the toughness and mechanical property of melamine formaldehyde resin, and reduce brittleness.
Combining the performance test data of examples 15-19, the package paperboard of example 18 was found to have a tensile strength, burst index, ring crush strength and stiffness of 47.5n.m/g, 3.45KPa m2/g, 9.57n.m/g and 5.59mn.m, respectively, which were all higher than the package paperboard of examples 15-17 and example 19; and the minimum water absorption capacity of the packaging paperboard of the example 18 is 0.74g/m 2 The content of the chitosan and the fatty alcohol-polyoxyethylene ether in the sizing layer raw material in the embodiment 18 is more appropriate, the surface strength of the packaging paperboard is improved, the chitosan-polyoxyethylene ether packaging paperboard has good film forming property and can be connected with paper fibers through hydrogen bonds, the surface sizing effect can be improved by adding the chitosan-polyoxyethylene ether packaging paperboard, the Cobb value of the packaging paperboard is reduced while the surface strength of the packaging paperboard is enhanced, the solubility of the chitosan in water can be improved by using the fatty alcohol-polyoxyethylene ether, and the chitosan-polyoxyethylene ether packaging paperboard can be related to further improvement of the surface strength of the packaging paperboard due to the fact that a large number of polar groups are contained and can form hydrogen bond with hydroxyl groups of the paper surface fibers.
Combining the performance test data of example 18 and examples 20-21, the package paperboard of example 20 was found to have a tensile strength, burst index, ring crush strength and stiffness of up to 47.9n.m/g, 3.47KPa m2/g, 9.61n.m/g and 5.60mn.m, respectively, which were all higher than the package paperboard of examples 18 and 21; and the minimum water absorption capacity of the packaging paperboard of the example 20 is 0.72g/m 2 The contents of the aluminum sulfate in the sizing layer raw material in example 20 are more suitable, so that the surface strength of the packaging paperboard is improved, which is probably related to the improvement of the water resistance of the packaging paperboard by the aluminum sulfate and the improvement of the stiffness and the glossiness of the packaging paperboard.
Combining the performance test data of examples 22-26, the package paperboard of example 25 was found to have a tensile strength, burst index, ring crush strength and stiffness of 49.4n.m/g, 3.69KPa m2/g, 11.20n.m/g and 5.63mn.m, respectively, which were all higher than the package paperboard of examples 22-24 and example 26; and the minimum water absorption capacity of the packaging paperboard of example 25 is 0.65g/m 2 The contents of lecithin and sodium dodecyl benzene sulfonate in the raw materials of the sizing layer in example 25 are more appropriate, so that the surface strength of the packaging paperboard is improved, and the surface strength of the packaging paperboard is improved by adding the lecithin and the sodium dodecyl benzene sulfonate in a mixing manner.
Combining the performance test data of examples 27-29, the package paperboard of example 28 was found to have a tensile strength, burst index, ring crush strength and stiffness of up to 52.3n.m/g, 3.94KPa m2/g, 12.90n.m/g and 5.65mn.m, respectively, which were higher than those of the package paperboard of examples 27 and 29; and the minimum water absorption of the packaging paperboard of example 28 is 0.61g/m 2 The contents of the components are lower than those of the packaging cardboard in examples 27 and 29, which shows that the surface strength of the packaging cardboard is improved by properly adding the polymeric alumina in the raw material of the sizing layer in example 28, and the surface strength of the packaging cardboard is probably related to the fact that the polymeric alumina has a large amount of positive charges and is stable in shape, suspended substances in the sizing layer can be electrically neutralized, the precipitation effect is achieved, the effect of the sizing layer is improved, and the tensile strength of the packaging cardboard is enhanced.
Combining the performance test data of the packaging paperboard of comparative examples 1-3 and example 1, the cationic starch, the carboxymethyl cellulose and the melamine formaldehyde resin are added into the surface layer raw material of the packaging paperboard, so that the surface strength of the packaging paperboard is improved to different degrees.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (10)

1. The packaging paperboard with high surface strength is characterized by consisting of a surface layer, a core layer and a bottom layer from top to bottom, wherein the outer surfaces of the surface layer and the bottom layer are coated with sizing layers; the surface layer comprises the following raw materials in parts by weight: 60-70 parts of bleached hardwood pulp, 20-30 parts of calcium carbonate, 0.5-1.5 parts of cationic starch, 0.1-0.5 part of carboxymethyl cellulose, 0.3-0.5 part of melamine formaldehyde resin and 1-2 parts of polyacrylamide.
2. The high surface strength packaging paperboard as claimed in claim 1, wherein the surface layer comprises the following raw materials in parts by weight: 64-68 parts of bleached hardwood pulp, 24-28 parts of calcium carbonate, 0.8-1.2 parts of cationic starch, 0.2-0.4 part of carboxymethyl cellulose, 0.35-0.45 part of melamine formaldehyde resin and 1.4-1.8 parts of polyacrylamide.
3. The high surface strength packaging paperboard as claimed in claim 1, wherein the surface layer further comprises the following raw materials in parts by weight: 1-2 parts of rosin size and 1-2 parts of nano cellulose.
4. The high surface strength packaging paperboard of claim 1, further characterized by: the melamine formaldehyde resin is obtained by cationic modification of acrylamide.
5. The high surface strength packaging paperboard of claim 4, wherein: the specific operation of the melamine formaldehyde resin modification is as follows: adding acrylamide and potassium persulfate into melamine formaldehyde resin, mixing, heating to 80 ℃, keeping the temperature, reacting for 1-2h, adjusting the pH value to 9.5, and cooling to obtain modified melamine formaldehyde resin;
the weight ratio of the acrylamide to the melamine formaldehyde resin is 1: (7-9); the weight ratio of the potassium persulfate to the melamine formaldehyde resin is 1: (1-3).
6. The high surface strength packaging paperboard as claimed in claim 1, wherein the sizing layer comprises the following raw materials in parts by weight: 10-20 parts of chitosan, 3-5 parts of fatty alcohol-polyoxyethylene ether, 1-3 parts of styrene acrylic acid (SAE) surface sizing agent, 1-3 parts of aluminum sulfate and 0.01-0.03 part of defoaming agent.
7. The high surface strength packaging paperboard as claimed in claim 6, wherein the sizing layer further comprises the following raw materials in parts by weight: 1-3 parts of lecithin and 0.5-1 part of sodium dodecyl benzene sulfonate.
8. The high surface strength package paperboard of claim 7 wherein said size layer further comprises 30 to 50 parts by weight of polyaluminum chloride.
9. The high surface strength packaging paperboard according to claim 1, wherein the core layer and the bottom layer comprise the following raw materials in parts by weight: 60-80 parts of bleached hardwood pulp, 20-30 parts of bleached softwood pulp and 1-2 parts of polyacrylamide.
10. A method for preparing a high surface strength packaging paperboard according to any one of claims 1-9, characterised by the following steps:
respectively mixing raw materials of a surface layer, a core layer and a bottom layer, disintegrating and grinding the raw materials into pulp to obtain pulp, spraying the pulp onto a net, dehydrating and molding the pulp, spraying starch, compounding the bottom layer on the lower surface of the core layer, and compounding the surface layer on the upper surface of the core layer to obtain base paper;
mixing the raw materials of the sizing layer, and uniformly stirring to obtain a sizing agent for later use;
and pressing and dehydrating the base paper shoe, drying, coating a sizing agent on the surface of the base paper shoe, drying, pressing and rolling to obtain the packaging paperboard.
CN202210431872.8A 2022-04-23 2022-04-23 Packaging paperboard with high surface strength and preparation method thereof Pending CN114960296A (en)

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CN107949674A (en) * 2015-07-20 2018-04-20 迈尔-梅林霍夫纸板箱股份公司 Couch board material and the method for producing couch board material
CN111945468A (en) * 2020-08-10 2020-11-17 玖龙纸业(天津)有限公司 Craft paper and production method thereof
CN113073498A (en) * 2021-04-08 2021-07-06 浙江山鹰纸业有限公司 High-breakage-resistance multilayer kraft liner board paper and preparation method thereof
WO2022084835A1 (en) * 2020-10-21 2022-04-28 Stora Enso Oyj Coated paperboard for beverage container carriers and corresponding beverage container carrier

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437242A (en) * 2013-07-22 2013-12-11 吉安集团有限公司 White craft paper and production method thereof
CN107949674A (en) * 2015-07-20 2018-04-20 迈尔-梅林霍夫纸板箱股份公司 Couch board material and the method for producing couch board material
CN107354803A (en) * 2016-05-09 2017-11-17 大东全斯福特种纸业（镇江）有限公司 The production method of ink-jet transfer printing paper
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