CN113047081A - High-glossiness coated paper and production process thereof - Google Patents

High-glossiness coated paper and production process thereof Download PDF

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Publication number
CN113047081A
CN113047081A CN202110361931.4A CN202110361931A CN113047081A CN 113047081 A CN113047081 A CN 113047081A CN 202110361931 A CN202110361931 A CN 202110361931A CN 113047081 A CN113047081 A CN 113047081A
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China
Prior art keywords
paper
coated paper
parts
coating
fiber pulp
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CN202110361931.4A
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Chinese (zh)
Inventor
陈军
王申良
诸士林
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Zhejiang Hangxing New Material Co ltd
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Zhejiang Hangxing New Material Co ltd
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Priority to CN202110361931.4A priority Critical patent/CN113047081A/en
Publication of CN113047081A publication Critical patent/CN113047081A/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
    • 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
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • 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
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D21H15/06—Long fibres, i.e. fibres exceeding the upper length limit of conventional paper-making fibres; Filaments
    • 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
    • D21H17/17—Ketenes, e.g. ketene dimers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—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
    • D21H17/66—Salts, e.g. alums
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/64—Inorganic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/828—Paper comprising more than one coating superposed two superposed coatings, the first applied being non-pigmented and the second applied being pigmented
    • 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

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)

Abstract

The invention relates to the technical field of papermaking, in particular to high-gloss coated paper and a production process thereof; according to the invention, long fiber pulp and short fiber pulp are used as raw materials for preparing the coated paper, and pigments, adhesives and organic additives made of calcium hydroxide, barium sulfate, porcelain clay, organic silicon, AKD, corn starch and the like are coated on the base paper and matched with the high beating degree, the proper mesh number and the coating amount of the base paper, so that the glossiness of the prepared coated paper can be greatly improved; meanwhile, a scraper coating mode is selected, the organic additive is added into the mixed slurry, and the uniform coating amount and the specific material of a coating cutter head are matched, so that the coating layer has good covering capacity, and the glossiness and the smoothness of the product are further improved; compared with common coated paper, the process for preparing the coated paper has the advantages of high whiteness, strong water resistance, strong printing ink resistance and the like.

Description

High-glossiness coated paper and production process thereof
Technical Field
The invention relates to the technical field of papermaking, in particular to high-glossiness coated paper and a production process thereof.
Background
The coated paper is made by coating a layer of coating on the base paper, so that the paper has good optical properties, printing performance and the like. The main applications are as follows: the ratio of the printing paper for printing magazines, books and other publishing paper to the printing paper for brands, packages, catalogs and other printing paper is about 1: 3. the coated paper can be divided into: coated paper, lightweight coated paper, and special coated paper such as calendered coated paper.
Coated paper is one of the commonly used printing materials in flexographic printing, and in order to meet the printability requirements of the flexographic printing process, it is mainly controlled from three aspects of ink absorbency, surface strength and sensitivity of the coating layer.
Coated paper produced using the prior art generally has a lower gloss. Furthermore, the coated paper itself has the disadvantages of low surface water resistance, low whiteness, low smoothness, and poor oil and printing ink resistance.
Based on this, the invention provides high-gloss coated paper and a production process thereof to solve the above problems.
Disclosure of Invention
The invention aims to provide high-glossiness coated paper and a production process thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-gloss coated paper and a production process thereof comprise the following steps:
i, according to the mass ratio of 1.2-1.5: 1.0 respectively weighing a proper amount of long fiber pulp and short fiber pulp, mixing the long fiber pulp and the short fiber pulp, pouring the mixed pulp into a heating container for boiling, separating fibers in the mixed pulp, purifying the mixed pulp by a pressure screen, a net front box and a net part, and sequentially performing processes such as pressing by a pressing part, drying by a drying part, reeling, slitting and the like to obtain base paper;
wherein, the moisture content of the base paper dried by the drying part is controlled to be kept between 3.0 and 4.0 percent;
II, respectively weighing 40-45 parts of calcium hydroxide, 30-43 parts of barium sulfate, 15-25 parts of china clay, 5-15 parts of high-gloss paraffin, 15-25 parts of organic silicon and 5-8 parts of organic additive in parts by weight; then putting the weighed materials into a pigment preparation barrel, mixing and stirring the materials, adding distilled water with the mass being 20-30% of the total mass of the raw materials in the barrel into the pigment preparation barrel, uniformly stirring the materials, filtering the stirred mixed materials by using a vibrating frame sieve, and obtaining mixed slurry which is a pigment finished product after filtering; and storing it for later use;
III, gluing the front and back sides of the base paper by adopting a film transfer gluing mode, drying the paper after gluing is finished, and performing hard calendering treatment on the paper by adopting a four-roller double-sided soft-dense calender after drying;
wherein, the adhesive is prepared by mixing and stirring 20-35 parts of AKD, 50-75 parts of corn starch, 1-5 parts of alum, 5-10 parts of melamine and 15-36 parts of distilled water uniformly by weight part, and then filtering by a vibrating frame sieve;
IV, uniformly coating the pigment on the paper after sizing by adopting a scraper coating mode, wherein in order to prevent the coating part of the scraper from generating scratches, the preparation material of the coating scraper is carbon steel alloy, and the alloy scraper has the advantages of better wear resistance and further improved yield on a coating workbench compared with the traditional ceramic scraper;
v, processing the coated paper by adopting a soft calendaring process; the soft calendaring process further improves the ink absorption rate and the flatness of the paper;
and VI, cutting the paper subjected to the soft calendaring treatment into paper with required specification, and rolling, sorting and packaging to obtain a finished product of the high-gloss coated paper.
Furthermore, the preparation method of the long fiber pulp in the step I comprises the following steps: and pulping the sulfate needle-leaved long fiber pulp with the fiber length of 2.6-3.0 mm through a front beating pool, a grinding disc machine and a back beating pool in sequence, wherein the pulping degree of the sulfate sisal long fiber pulp is 70-75 DEG SR.
Furthermore, the preparation method of the short fiber pulp in the step I comprises the following steps: and pulping the sulfate broad-leaved short fiber pulp with the fiber length of 0.8-1.2 mm through a front beating pool, a grinding disc machine and a back beating pool in sequence, wherein the pulping degree of the sulfate broad-leaved short fiber pulp is 70-75 DEG SR.
Furthermore, the sizing amount of the paper in the step III is 2-8 g/m2The drying temperature is 70-80 ℃, the line pressure of the hard calendering is 30-80 kN/m, and the temperature is 110-160 ℃.
Furthermore, the line pressure of the soft calendering in the step V is 20-60 kN/m, and the temperature is 85-130 ℃.
Furthermore, the pulping power during pulping is 210-230 kWh, the pulping current is controlled to be 300 +/-20A, and the pulping concentration is 5.5-6.2%.
Furthermore, the rotating speed of the rotor of the coating preparation barrel in the step II needs to reach 800-1500 r/min, and the coating preparation barrel is fully stirred for 140-160 min.
Furthermore, the mesh number of the vibrating frame screen in the step II is as follows: 100 to 120 mesh.
Further, the material of the organic additive may be one of polystyrene, hollow polystyrene, and polyvinylidene chloride copolymer.
Furthermore, the coating weight of the coating process in the step IV is 22-29 g/m2。
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the long fiber pulp and the short fiber pulp are used as raw materials for preparing the coated paper, and the pigment, the adhesive and the organic additive which are prepared from calcium hydroxide, barium sulfate, porcelain clay, organic silicon, AKD, corn starch and the like are coated on the base paper and matched with the high beating degree, the proper mesh number and the coating amount of the base paper, so that the glossiness of the prepared coated paper can be greatly improved.
2. According to the invention, a scraper coating mode is selected, and meanwhile, the organic additive is added into the mixed slurry, and the uniform coating amount and the specific material of the coating cutter head are matched, so that the coating layer has good covering capability, and the glossiness and the smoothness of the product are further improved.
3. Compared with common coated paper, the process for preparing the coated paper comprises the following steps: the paper has the advantages of high whiteness, and strong water resistance, printing ink resistance and the like.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high-gloss coated paper and a production process thereof comprise the following steps:
i, mixing the raw materials in a mass ratio of 1.2: 1.0 respectively weighing a proper amount of long fiber pulp and short fiber pulp, mixing the long fiber pulp and the short fiber pulp, pouring the mixed pulp into a heating container for boiling, separating fibers in the mixed pulp, purifying the mixed pulp by a pressure screen, a net front box and a net part, and sequentially performing processes such as pressing by a pressing part, drying by a drying part, reeling, slitting and the like to obtain base paper;
wherein, the moisture content of the base paper dried by the drying part is controlled to be kept at 3.0 percent;
II, respectively weighing 40 parts of calcium hydroxide, 30 parts of barium sulfate, 15 parts of porcelain clay, 5 parts of high-gloss paraffin, 15 parts of organic silicon and 5 parts of organic additive in parts by weight; then putting the weighed materials into a pigment preparation barrel, mixing and stirring the materials, adding distilled water with the mass of 20 of the total mass of the raw materials in the barrel into the pigment preparation barrel, uniformly stirring the materials, filtering the stirred mixed materials by using a vibrating frame sieve, and obtaining mixed slurry which is a pigment finished product after filtering; and storing it for later use;
III, gluing the front and back sides of the base paper by adopting a film transfer gluing mode, drying the paper after gluing is finished, and performing hard calendering treatment on the paper by adopting a four-roller double-sided soft-dense calender after drying;
wherein, the adhesive is prepared by mixing and stirring 20 parts of AKD, 50 parts of corn starch, 1 part of alum, 5 parts of melamine and 15 parts of distilled water uniformly by weight part and then filtering the mixture by a vibrating frame sieve;
IV, uniformly coating the pigment on the paper after sizing by adopting a scraper coating mode, wherein in order to prevent the coating part of the scraper from generating scratches, the preparation material of the coating scraper is carbon steel alloy, and the alloy scraper has the advantages of better wear resistance and further improved yield on a coating workbench compared with the traditional ceramic scraper;
v, processing the coated paper by adopting a soft calendaring process; the soft calendaring process further improves the ink absorption rate and the flatness of the paper;
and VI, cutting the paper subjected to the soft calendaring treatment into paper with required specification, and rolling, sorting and packaging to obtain a finished product of the high-gloss coated paper.
The preparation method of the long fiber pulp in the step I comprises the following steps: and beating the sulfate needle-leaved long fiber pulp with the fiber length of 2.6mm in a beating front pool, a grinding disc machine and a beating back pool in sequence, wherein the beating degree of the sulfate sisal long fiber pulp is 70 degrees SR.
The preparation method of the short fiber pulp in the step I comprises the following steps: the method comprises the following steps of beating sulfate broadleaf short fiber pulp with the fiber length of 0.8mm in sequence through a beating front pool, a grinding disc machine and a beating back pool, wherein the beating degree of the sulfate broadleaf short fiber pulp is 70-degree SR.
In the step III, the sizing amount of the paper is 2g/m2, the drying temperature is 70 ℃, the line pressure of the hard calendering is 30kN/m, and the temperature is 110 ℃.
The line pressure of the soft calendering in step V is 20kN/m, and the temperature is 85 ℃.
The pulping power during pulping is 210kWh, the pulping current is controlled at 280A, and the pulping concentration is 5.5%.
And in the step II, the rotating speed of a rotor of the coating preparation barrel needs to reach 800r/min, and the coating is fully stirred for 140 min.
In the step II, the mesh number of the vibrating frame sieve is as follows: 100 to 120 mesh.
The material of the organic additive is selected to be polystyrene.
The coating weight of the coating process in the step IV is 22g/m2。
Example 2
A high-gloss coated paper and a production process thereof comprise the following steps:
i, mixing the raw materials in a mass ratio of 1.3: 1.0 respectively weighing a proper amount of long fiber pulp and short fiber pulp, mixing the long fiber pulp and the short fiber pulp, pouring the mixed pulp into a heating container for boiling, separating fibers in the mixed pulp, purifying the mixed pulp by a pressure screen, a net front box and a net part, and sequentially performing processes such as pressing by a pressing part, drying by a drying part, reeling, slitting and the like to obtain base paper;
wherein, the moisture content of the base paper dried by the drying part is controlled to be kept at 3.5 percent;
II, respectively weighing 42 parts of calcium hydroxide, 35 parts of barium sulfate, 20 parts of porcelain clay, 10 parts of high-gloss paraffin, 10 parts of organic silicon and 6 parts of organic additive in parts by weight; then putting the weighed materials into a pigment preparation barrel, mixing and stirring the materials, adding distilled water with the mass of 20 of the total mass of the raw materials in the barrel into the pigment preparation barrel, uniformly stirring the materials, filtering the stirred mixed materials by using a vibrating frame sieve, and obtaining mixed slurry which is a pigment finished product after filtering; and storing it for later use;
III, gluing the front and back sides of the base paper by adopting a film transfer gluing mode, drying the paper after gluing is finished, and performing hard calendering treatment on the paper by adopting a four-roller double-sided soft-dense calender after drying;
wherein, the adhesive is prepared by mixing and stirring uniformly 27 parts of AKD, 62 parts of corn starch, 3 parts of alum, 7 parts of melamine and 25 parts of distilled water by weight part and then filtering by a vibrating frame sieve;
IV, uniformly coating the pigment on the paper after sizing by adopting a scraper coating mode, wherein in order to prevent the coating part of the scraper from generating scratches, the preparation material of the coating scraper is carbon steel alloy, and the alloy scraper has the advantages of better wear resistance and further improved yield on a coating workbench compared with the traditional ceramic scraper;
v, processing the coated paper by adopting a soft calendaring process; the soft calendaring process further improves the ink absorption rate and the flatness of the paper;
and VI, cutting the paper subjected to the soft calendaring treatment into paper with required specification, and rolling, sorting and packaging to obtain a finished product of the high-gloss coated paper.
The preparation method of the long fiber pulp in the step I comprises the following steps: and beating the sulfate needle-leaved long fiber pulp with the fiber length of 2.8mm in a beating front pool, a grinding disc machine and a beating back pool in sequence, wherein the beating degree of the sulfate sisal long fiber pulp is 73 degrees SR.
The preparation method of the short fiber pulp in the step I comprises the following steps: the method comprises the following steps of beating sulfate broadleaf short fiber pulp with the fiber length of 1.0mm in sequence through a beating front pool, a grinding disc machine and a beating back pool, wherein the beating degree of the sulfate broadleaf short fiber pulp is 73-degree SR.
The sizing amount of the paper in the step III is 5g/m2The drying temperature is 75 ℃, and the line pressure of the hard calendering is60kN/m, temperature 130 ℃.
The line pressure of the soft calendering in step V was 40kN/m at a temperature of 105 ℃.
The pulping power during pulping is 220kWh, the pulping current is controlled at 300A, and the pulping concentration is 5.8%.
And in the step II, the rotating speed of a rotor of the coating preparation barrel needs to reach 1100r/min, and the coating preparation barrel is fully stirred for 150 min.
In the step II, the mesh number of the vibrating frame sieve is as follows: 110 meshes.
The material of the organic additive is selected from hollow polystyrene.
The coating weight of the coating process in the step IV is 25g/m2
Example 3
A high-gloss coated paper and a production process thereof comprise the following steps:
i, mixing the raw materials in a mass ratio of 1.5: 1.0 respectively weighing a proper amount of long fiber pulp and short fiber pulp, mixing the long fiber pulp and the short fiber pulp, pouring the mixed pulp into a heating container for boiling, separating fibers in the mixed pulp, purifying the mixed pulp by a pressure screen, a net front box and a net part, and sequentially performing processes such as pressing by a pressing part, drying by a drying part, reeling, slitting and the like to obtain base paper;
wherein, the moisture content of the base paper dried by the drying part is controlled to be kept at 4.0 percent;
II, respectively weighing 45 parts of calcium hydroxide, 43 parts of barium sulfate, 25 parts of porcelain clay, 15 parts of high-gloss paraffin, 25 parts of organic silicon and 8 parts of organic additive in parts by weight; then putting the weighed materials into a pigment preparation barrel, mixing and stirring the materials, adding distilled water with the mass being 30% of the total mass of the raw materials in the barrel into the pigment preparation barrel, uniformly stirring the materials, filtering the stirred mixed materials by using a vibrating frame sieve, and obtaining mixed slurry which is a pigment finished product after filtering; and storing it for later use;
III, gluing the front and back sides of the base paper by adopting a film transfer gluing mode, drying the paper after gluing is finished, and performing hard calendering treatment on the paper by adopting a four-roller double-sided soft-dense calender after drying;
wherein, the adhesive is prepared by mixing and stirring 35 parts of AKD, 75 parts of corn starch, 5 parts of alum, 10 parts of melamine and 36 parts of distilled water uniformly by weight part and then filtering the mixture by a vibrating frame sieve;
IV, uniformly coating the pigment on the paper after sizing by adopting a scraper coating mode, wherein in order to prevent the coating part of the scraper from generating scratches, the preparation material of the coating scraper is carbon steel alloy, and the alloy scraper has the advantages of better wear resistance and further improved yield on a coating workbench compared with the traditional ceramic scraper;
v, processing the coated paper by adopting a soft calendaring process; the soft calendaring process further improves the ink absorption rate and the flatness of the paper;
and VI, cutting the paper subjected to the soft calendaring treatment into paper with required specification, and rolling, sorting and packaging to obtain a finished product of the high-gloss coated paper.
The preparation method of the long fiber pulp in the step I comprises the following steps: and beating the sulfate needle-leaved long fiber pulp with the fiber length of 3.0mm in sequence through a beating front pool, a grinding disc machine and a beating back pool, wherein the beating degree of the sulfate sisal long fiber pulp is 75 DEG SR.
The preparation method of the short fiber pulp in the step I comprises the following steps: the method comprises the following steps of beating sulfate broad-leaved short fiber pulp with the fiber length of 1.2mm in sequence through a beating front pool, a grinding disc machine and a beating back pool, wherein the beating degree of the sulfate broad-leaved short fiber pulp is 75 DEG SR.
The sizing amount of the paper in the step III is 8g/m2The drying temperature is 80 ℃, the line pressure of the hard calendering is 80kN/m, and the temperature is 160 ℃.
The line pressure of the soft calendering in step V was 60kN/m, the temperature was 130 ℃.
The pulping power during pulping is 230kWh, the pulping current is controlled at 320A, and the pulping concentration is 6.2%.
And in the step II, the rotating speed of a rotor of the coating preparation barrel needs to reach 1500r/min, and the coating is fully stirred for 160 min.
And in the step II, the mesh number of the vibrating frame sieve is 120 meshes.
The material of the organic additive is selected from polyvinylidene chloride copolymer.
The coating weight of the coating process in the step IV is 29g/m2。
Comparative example: anhui Hefei coated paper produced by certain paper industry Co.
Performance testing
The coated papers prepared by examples 1 to 3 of the present invention were designated as experimental examples 1 to 3; the coated papers provided in examples 1-3 and comparative examples were then tested for performance and each set of test data obtained was recorded in the following table:
Figure BDA0003005936160000091
as can be seen from the relevant data in the table, the coated paper prepared according to the invention has the advantages of high glossiness, high whiteness, high smoothness, and strong water resistance, printing ink resistance and the like. Therefore, the coated paper prepared by the invention has wider market prospect and is more suitable for popularization.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (10)

1. The high-gloss coated paper and the production process thereof are characterized by comprising the following steps of:
i, according to the mass ratio of 1.2-1.5: 1.0 respectively weighing a proper amount of long fiber pulp and short fiber pulp, mixing the long fiber pulp and the short fiber pulp, pouring the mixed pulp into a heating container for boiling, separating fibers in the mixed pulp, purifying the mixed pulp by a pressure screen, a net front box and a net part, and sequentially performing processes such as pressing by a pressing part, drying by a drying part, reeling, slitting and the like to obtain base paper;
wherein, the moisture content of the base paper dried by the drying part is controlled to be kept between 3.0 and 4.0 percent;
II, respectively weighing 40-45 parts of calcium hydroxide, 30-43 parts of barium sulfate, 15-25 parts of china clay, 5-15 parts of high-gloss paraffin, 15-25 parts of organic silicon and 5-8 parts of organic additive in parts by weight; then putting the weighed materials into a pigment preparation barrel, mixing and stirring the materials, adding distilled water with the mass being 20-30% of the total mass of the raw materials in the barrel into the pigment preparation barrel, uniformly stirring the materials, filtering the stirred mixed materials by using a vibrating frame sieve, and obtaining mixed slurry which is a pigment finished product after filtering; and storing it for later use;
III, gluing the front and back sides of the base paper by adopting a film transfer gluing mode, drying the paper after gluing is finished, and performing hard calendering treatment on the paper by adopting a four-roller double-sided soft-dense calender after drying;
wherein, the adhesive is prepared by mixing and stirring 20-35 parts of AKD, 50-75 parts of corn starch, 1-5 parts of alum, 5-10 parts of melamine and 15-36 parts of distilled water uniformly by weight part, and then filtering by a vibrating frame sieve;
IV, uniformly coating the pigment on the paper after sizing by adopting a scraper coating mode, wherein in order to prevent the coating part of the scraper from generating scratches, the preparation material of the coating scraper is carbon steel alloy, and the alloy scraper has the advantages of better wear resistance and further improved yield on a coating workbench compared with the traditional ceramic scraper;
v, processing the coated paper by adopting a soft calendaring process; the soft calendaring process further improves the ink absorption rate and the flatness of the paper;
and VI, cutting the paper subjected to the soft calendaring treatment into paper with required specification, and rolling, sorting and packaging to obtain a finished product of the high-gloss coated paper.
2. The coated paper with high gloss and the production process thereof according to claim 1, wherein the long fiber slurry in the step I is prepared by the following steps: and pulping the sulfate needle-leaved long fiber pulp with the fiber length of 2.6-3.0 mm through a front beating pool, a grinding disc machine and a back beating pool in sequence, wherein the pulping degree of the sulfate sisal long fiber pulp is 70-75 DEG SR.
3. The high-gloss coated paper and the production process thereof according to claim 1, wherein the short fiber pulp of step I is prepared by the following steps: and pulping the sulfate broad-leaved short fiber pulp with the fiber length of 0.8-1.2 mm through a front beating pool, a grinding disc machine and a back beating pool in sequence, wherein the pulping degree of the sulfate broad-leaved short fiber pulp is 70-75 DEG SR.
4. The coated paper with high gloss and the production process thereof as claimed in claim 1, wherein the sizing amount of the paper in the step III is 2-8 g/m2The drying temperature is 70-80 ℃, the line pressure of the hard calendering is 30-80 kN/m, and the temperature is 110-160 ℃.
5. The coated paper with high gloss and the production process thereof as claimed in claim 1, wherein the line pressure of the soft calendering in the step V is 20-60 kN/m, and the temperature is 85-130 ℃.
6. The high-gloss coated paper and the production process thereof according to claim 2, wherein the beating power during beating is 210-230 kWh, the beating current is controlled at 300 +/-20A, and the beating concentration is 5.5-6.2%.
7. The high-gloss coated paper and the production process thereof as claimed in claim 1, wherein the rotor speed of the coating preparation barrel in the step II is 800-1500 r/min, and the mixture is fully stirred for 140-160 min.
8. The high-gloss coated paper and the production process thereof according to claim 1, wherein the screen mesh number of the vibrating frame screen in the step II is as follows: 100 to 120 mesh.
9. The high-gloss coated paper and the manufacturing process thereof according to claim 1, wherein the material of the organic additive is one of polystyrene, hollow polystyrene, and polyvinylidene chloride copolymer.
10. The high-gloss coated paper and the production process thereof according to claim 1, wherein the coating weight of the coating process in the step IV is 22-29 g/m2。
CN202110361931.4A 2021-04-02 2021-04-02 High-glossiness coated paper and production process thereof Pending CN113047081A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114875718A (en) * 2022-05-05 2022-08-09 湖南文睿教育印务有限公司 Nontoxic and odorless homework paper and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338531A (en) * 2008-08-07 2009-01-07 浙江永泰纸业集团股份有限公司 Method for producing coated kraft card board by home-made paper machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338531A (en) * 2008-08-07 2009-01-07 浙江永泰纸业集团股份有限公司 Method for producing coated kraft card board by home-made paper machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114875718A (en) * 2022-05-05 2022-08-09 湖南文睿教育印务有限公司 Nontoxic and odorless homework paper and preparation method thereof
CN114875718B (en) * 2022-05-05 2022-12-30 湖南文睿教育印务有限公司 Nontoxic and odorless homework paper and preparation method thereof

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