CN113005819A - High-stiffness coated paper and production process thereof - Google Patents

High-stiffness coated paper and production process thereof Download PDF

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Publication number
CN113005819A
CN113005819A CN202110363336.4A CN202110363336A CN113005819A CN 113005819 A CN113005819 A CN 113005819A CN 202110363336 A CN202110363336 A CN 202110363336A CN 113005819 A CN113005819 A CN 113005819A
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Prior art keywords
paper
coating
layer
coated
coating layer
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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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Publication of CN113005819A publication Critical patent/CN113005819A/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material

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  • Paper (AREA)

Abstract

The invention relates to the technical field of papermaking, in particular to high-stiffness coated paper and a production process thereof; the surface paper, the core paper and the base paper adopted by the base paper are all pressed by four times through a pressing part of a paper machine, so that the stiffness of the paper is improved, the base paper adopts a three-layer pressing design, the strength and the service life of the paper are improved, the components of a stiffening agent and a high polymer are selected for further reforming the coating liquid, the related strength of the paper is convenient to improve, the coating layer comprises a surface coating layer, a pre-coating layer and a back coating layer, the surface coating layer is coated on the surface layer of the pre-coating layer, the pre-coating layer is coated on the surface layer of the surface paper, and the back coating layer is coated on the surface of the base paper, so that the surface of the paper is ensured to be provided with an even coating layer to realize the improvement of the.

Description

High-stiffness coated paper and production process thereof
Technical Field
The invention relates to the technical field of papermaking, in particular to high-stiffness coated paper and a production process thereof.
Background
With the continuous improvement of living standard of people, paper occupies more and more specific gravity in life, the paper is used for multiple functions such as writing and packaging, with the continuous improvement of the demand for the paper, the quality requirement for the paper also continuously rises, and the demand for the paper on the current market not only requires the color of the paper, but also the water resistance of the paper, the color of the paper and the stiffness of the paper.
The stiffness of paper is directly determined by the properties of the coating, and the coating of the existing paper is generally prepared by mixing conventional starch and other substances, can improve the stiffness of the paper after being coated on the paper, but is influenced by the coating formula.
Based on the technical scheme, the invention provides high-stiffness coated paper and a production process thereof, and aims to solve the problems.
Disclosure of Invention
The invention aims to provide high-stiffness coated paper and a production process thereof, and the engineering base paper prepared by the invention not only has the advantages that the stiffness of the paper is improved by changing the base paper; in addition, the invention improves the stiffness of the coated paper by changing the self formula of the coating liquid.
In order to achieve the purpose, the invention provides the following technical scheme:
the high-stiffness coated paper comprises base paper and a coating layer, wherein the base paper comprises surface paper, core paper and bottom paper, the weight ratio of the surface paper to the total weight ratio of the paper is 20-40%, the weight ratio of the core paper to the total weight ratio of the paper is 30-55%, the weight ratio of the bottom paper to the total weight ratio of the paper is 10-25%, and the weight ratio of the coating layer to the total weight ratio of the paper is 8-18%, and the production process comprises the following steps:
I. respectively pulping and mixing the surface paper pulp, the core paper pulp and the bottom paper pulp by a pulper, screening and pulping by a pulping machine, and then feeding the mixture into a head box of a three-paper-folded net forming paper machine;
II. Papermaking and compounding in the wire part of a paper machine to produce paper with a three-layer structure of surface paper, core paper and bottom paper; the pulp-net speed ratios of the three-layer forming net of the surface paper, the core paper and the bottom paper are respectively as follows: 0.964 to 0.984, 0.923 to 0.965 and 0.905 to 0.960;
III, entering a pressing part of a paper machine, and performing four-pass pressing; the pressure range of the first press is as follows: 90-110 kN/m; the pressure range of the second press is as follows: 150-180 kN/m; the pressure range of the third press is as follows: 600-750 kN/m; the pressure range of the fourth pressing is as follows: 40-60 kN/m;
IV, drying, surface sizing, entering a belt press calender for belt press polishing, wherein the pressure of the belt press polishing is adjusted to 15-45 kN/m; obtaining base paper;
v, dissolving 10-12 parts by weight of sodium sulfate in water to prepare a solution with the mass concentration of 25-30%, dispersing 25-35 parts by weight of mineral fibers in the sodium sulfate solution, dispersing for 10-15 minutes at the stirring speed of 1200-2400 rpm to form slurry, then adding sulfuric acid to adjust the pH of the slurry to 2-5, slowly adding 15-20 parts by weight of barium carbonate, uniformly coating the gradually formed precipitated barium sulfate on the surface of the mineral fibers, and filtering to dry for later use;
VI, stirring the mineral fiber coated by the precipitated barium sulfate obtained in the step V, 20-40 parts by weight of stripping soil, 20-50 parts by weight of kaolin, 12-20 parts by weight of high polymer, 3-6 parts by weight of stiffening agent and 0.5-1 part by weight of lubricant in a mixer at a high speed for 30-35 minutes, and obtaining the coating after the mixing temperature is 90-110 ℃;
VII, coating a base paper by a coating machine, coating a precoating layer on the surface of the surface paper by the coating machine, coating a surface coating layer on the precoating layer, and coating a back coating layer on the bottom surface of the base paper;
VIII, coiling the paper obtained in the step VII, and then pressing the paper by using a calendaring hot press so as to enable the paper to be smooth and glossy.
Further, the facial tissue is made from bleached chemical wood pulp; the core paper is made of unbleached native wood pulp; the base paper is made of unbleached native wood pulp.
Furthermore, the preparation process of the birch pulp comprises the following steps: the coating layer comprises a top coating layer, a precoating layer and a back coating layer, wherein the top coating layer is coated on the surface layer of the precoating layer, the precoating layer is coated on the surface layer of the surface paper, and the back coating layer is coated on the surface of the backing paper.
Further, the mineral fiber is at least one of brucite fiber, fly ash fiber, wollastonite fiber, calcium carbonate fiber and sepiolite fiber.
Further, the exfoliated soil and kaolin are fine powder having a particle size of 1800 to 2500 mesh.
Further, the high molecular polymer is at least one of polyethylene terephthalate, polybutylene terephthalate and polyvinyl chloride.
Still further, the stiffening agent comprises at least one of core-shell type cationic polyacrylate, core-shell type cationic polyvinyl acetate, and core-shell type cationic polyamide polyurea resin.
Further, the lubricant is at least one of stearate and glyceryl monostearate, and the lubricant with certain polarity promotes the coating to be attached to the surface layers of the surface paper and the bottom paper and also facilitates the adhesion between the precoating layer and the surface coating.
Furthermore, the coating weight of the pre-coating layer and the back coating layer is controlled to be 2.0-3.5 g/m2The coating weight of the top coating is controlled to be 1.0-2.0 g/m2And controlling the drying temperature of the coating machine to be 140-160 ℃.
Furthermore, the adhesive among the surface paper, the core paper and the bottom paper is prepared by mixing starch, flaky calcium carbonate, polyvinyl alcohol, melamine resin and water according to the mass ratio of 7: 3: 1: 30-35.
Compared with the prior art, the invention has the beneficial effects that:
1. the surface paper, the core paper and the bottom paper adopted by the base paper are all pressed by four times through a pressing part of a paper machine, so that the stiffness of the paper is improved, and the base paper adopts a three-layer pressing design, so that the strength of the paper is improved and the service life of the paper is prolonged.
2. The components of the coating liquid are further reformed by selecting the stiffening agent and the high molecular polymer, so that the related strength of the paper is convenient to improve, and the precipitated barium sulfate is uniformly coated on the surface of the mineral fiber, so that the toughness of the paper is improved, and the stiffness of the paper is improved on the side surface.
3. The coating layer comprises a top coating layer, a precoating layer and a back coating layer, wherein the top coating layer is coated on the surface layer of the precoating layer, the precoating layer is coated on the surface layer of the surface paper, and the back coating layer is coated on the surface of the backing paper, so that the surface of the paper is ensured to be provided with the uniform coating layer to improve the high stiffness of the paper.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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-stiffness coated paper and a production process thereof comprise the following steps:
I. respectively pulping and mixing the surface paper pulp, the core paper pulp and the bottom paper pulp by a pulper, screening and pulping by a pulping machine, and then feeding the mixture into a head box of a three-paper-folded net forming paper machine;
II. Papermaking and compounding in the wire part of a paper machine to produce paper with a three-layer structure of surface paper, core paper and bottom paper; the pulp-net speed ratios of the three-layer forming net of the surface paper, the core paper and the bottom paper are respectively as follows: 0.967, 0.933, 0.910;
III, entering a pressing part of a paper machine, and performing four-pass pressing; the pressure range of the first press is as follows: the pressure range of the 95kN/m second press is as follows: the pressure range of the third press at 160kN/m is as follows: the pressure range of the fourth press of 600kN/m is as follows: 42kN/m
IV, drying, surface sizing, entering a belt calender for belt calendering, wherein the pressure of the belt calendering is adjusted to be 19 kN/m; obtaining base paper;
v, dissolving 10 parts by weight of sodium sulfate in water to prepare a solution with the mass concentration of 26%, dispersing 25 parts by weight of mineral fibers in the sodium sulfate solution, dispersing for 15 minutes at the stirring speed of 12005rpm to form slurry, then adding sulfuric acid to adjust the pH of the slurry to 3, slowly adding 15 parts by weight of barium carbonate, uniformly coating the surface of the mineral fibers with gradually formed precipitated barium sulfate, and filtering to dry for later use;
VI, stirring the mineral fiber coated by the precipitated barium sulfate obtained in the step V, 20 parts by weight of stripping soil, 25 parts by weight of kaolin, 15 parts by weight of high molecular polymer, 3 parts by weight of stiffening agent and 1 part by weight of lubricant in a mixer at a high speed for 30 minutes, and obtaining a coating after the mixing temperature is 90 ℃;
VII, coating a base paper by a coating machine, coating a precoating layer on the surface of the surface paper by the coating machine, coating a surface coating layer on the precoating layer, and coating a back coating layer on the bottom surface of the base paper;
VIII, coiling the paper obtained in the step VII, and then pressing the paper by using a calendaring hot press so as to enable the paper to be smooth and glossy.
The weight ratio of the surface paper to the total weight ratio of the paper is 30%, the weight ratio of the medium paper to the total weight ratio of the paper is 40%, the weight ratio of the base paper to the total weight ratio of the paper is 20%, and the weight ratio of the coating layer to the total weight ratio of the paper is 10%.
The mineral fiber is brucite fiber.
The grain size of the flaking soil and kaolin is 1800 meshes.
The high molecular polymer is polyethylene terephthalate.
The stiffening agent is core-shell type cationic polyacrylate.
The lubricant is stearate.
The coating weight of the pre-coating layer and the back coating layer is controlled to be 2.0g/m2The coating weight of the top coating is controlled to be 1.0g/m2The drying temperature of the coating machine is controlled at 150 ℃.
Example 2
A high-stiffness coated paper and a production process thereof comprise the following steps:
I. respectively pulping and mixing the surface paper pulp, the core paper pulp and the bottom paper pulp by a pulper, screening and pulping by a pulping machine, and then feeding the mixture into a head box of a three-paper-folded net forming paper machine;
II. Papermaking and compounding in the wire part of a paper machine to produce paper with a three-layer structure of surface paper, core paper and bottom paper; the pulp-net speed ratios of the three-layer forming net of the surface paper, the core paper and the bottom paper are respectively as follows: 0.970, 0.960;
III, entering a pressing part of a paper machine, and performing four-pass pressing; the pressure range of the first press is as follows: 100 kN/m; the pressure range of the second press is as follows: 180 kN/m; the pressure range of the third press is as follows: 650 kN/m; the pressure range of the fourth pressing is as follows: 55 kN/m;
IV, drying, surface sizing, entering a belt calender for belt calendering, wherein the pressure of the belt calendering is adjusted to 30 kN/m; obtaining base paper;
v, dissolving 11 parts by weight of sodium sulfate in water to prepare a solution with the mass concentration of 28%, dispersing 30 parts by weight of mineral fibers in the sodium sulfate solution, dispersing for 15 minutes at the stirring speed of 2000rpm to form slurry, then adding sulfuric acid to adjust the pH of the slurry to 3, slowly adding 18 parts by weight of barium carbonate, uniformly coating the surface of the mineral fibers with gradually formed precipitated barium sulfate, and then filtering to dry for later use;
VI, stirring the mineral fiber coated by the precipitated barium sulfate obtained in the step V, 25 parts by weight of stripping soil, 30 parts by weight of kaolin, 15 parts by weight of high polymer, 5 parts by weight of stiffening agent and 1 part by weight of lubricant in a mixer at a high speed for 35 minutes, and obtaining a coating after the mixing temperature is 100 ℃;
VII, coating a base paper by a coating machine, coating a precoating layer on the surface of the surface paper by the coating machine, coating a surface coating layer on the precoating layer, and coating a back coating layer on the bottom surface of the base paper;
VIII, coiling the paper obtained in the step VII, and then pressing the paper by using a calendaring hot press so as to enable the paper to be smooth and glossy.
The weight ratio of the surface paper to the total weight ratio of the paper is 40%, the weight ratio of the medium paper to the total weight ratio of the paper is 30%, the weight ratio of the base paper to the total weight ratio of the paper is 20%, and the weight ratio of the coating layer to the total weight ratio of the paper is 10%.
The mineral fiber is wollastonite fiber.
The exfoliated soil and kaolin are fine powder with the particle size of 2000 meshes.
The high molecular polymer is polybutylene terephthalate.
The stiffening agent is core-shell type cationic polyvinyl acetate.
The lubricant is glyceryl monostearate.
The coating weight of the pre-coating layer and the back coating layer is controlled to be 2.5g/m2The coating weight of the top coating is controlled to be 1.5g/m2The drying temperature of the coating machine is controlled at 160 ℃.
Example 3
A high-stiffness coated paper and a production process thereof comprise the following steps:
I. respectively pulping and mixing the surface paper pulp, the core paper pulp and the bottom paper pulp by a pulper, screening and pulping by a pulping machine, and then feeding the mixture into a head box of a three-paper-folded net forming paper machine;
II. Papermaking and compounding in the wire part of a paper machine to produce paper with a three-layer structure of surface paper, core paper and bottom paper; the pulp-net speed ratios of the three-layer forming net of the surface paper, the core paper and the bottom paper are respectively as follows: 0.974, 0.936, 0.912;
III, entering a pressing part of a paper machine, and performing four-pass pressing; the pressure range of the first press is as follows: 110 kN/m; the pressure range of the second press is as follows: 150 kN/m; the pressure range of the third press is as follows: 750 kN/m; the pressure range of the fourth pressing is as follows: 60 kN/m;
IV, drying, surface sizing, entering a belt calender for belt calendering, wherein the pressure of the belt calendering is adjusted to 40 kN/m; obtaining base paper;
v, dissolving 12 parts by weight of sodium sulfate in water to prepare a solution with the mass concentration of 29%, dispersing 35 parts by weight of mineral fibers in the sodium sulfate solution, dispersing for 15 minutes at the stirring speed of 2400rpm to form slurry, then adding sulfuric acid to adjust the pH of the slurry to 3, slowly adding 20 parts by weight of barium carbonate, uniformly coating the surface of the mineral fibers with gradually formed precipitated barium sulfate, and filtering to dry for later use;
VI, stirring the mineral fiber coated by the precipitated barium sulfate obtained in the step V, 40 parts by weight of stripping soil, 50 parts by weight of kaolin, 15 parts by weight of high molecular polymer, 6 parts by weight of stiffening agent and 0.5 part by weight of lubricant in a mixer at a high speed for 30 minutes, and obtaining a coating after the mixing temperature is 100 ℃;
VII, coating a base paper by a coating machine, coating a precoating layer on the surface of the surface paper by the coating machine, coating a surface coating layer on the precoating layer, and coating a back coating layer on the bottom surface of the base paper;
VIII, coiling the paper obtained in the step VII, and then pressing the paper by using a calendaring hot press so as to enable the paper to be smooth and glossy.
The weight ratio of the surface paper to the total weight ratio of the paper is 30%, the weight ratio of the medium paper to the total weight ratio of the paper is 30%, the weight ratio of the base paper to the total weight ratio of the paper is 25%, and the weight ratio of the coating layer to the total weight ratio of the paper is 15%.
The mineral fiber is calcium carbonate fiber.
The exfoliated soil and kaolin are fine powder with the grain size of 2500 meshes.
The high molecular polymer is polyvinyl chloride.
The stiffening agent is core-shell type cationic polyamide polyurea resin.
The lubricant is glyceryl monostearate.
The coating weight of the pre-coating layer and the back coating layer is controlled to be 3.0g/m2The coating weight of the top coating is controlled to be 1.5g/m2The drying temperature of the coating machine is controlled at 160 ℃.
Comparative example: coated paper produced by Xinzheng paper industries of Henan, Ltd.
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 BDA0003006432090000111
from the relevant data in the table, it is clear that the coated papers prepared according to the invention have very high stiffness properties. The coated paper has wide market prospect and is more suitable for popularization.
In the description herein, reference to the description of the terms "one embodiment," "an example," "a specific example," etc., means 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. A high-stiffness coated paper and a production process thereof are characterized in that: the production process comprises raw paper and a coating layer, wherein the raw paper comprises surface paper, core paper and bottom paper, the weight ratio of the surface paper to the total weight ratio of the paper is 20-40%, the weight ratio of the core paper to the total weight ratio of the paper is 30-55%, the weight ratio of the bottom paper to the total weight ratio of the paper is 10-25%, and the weight ratio of the coating layer to the total weight ratio of the paper is 8-18%, and the production process comprises the following steps:
I. respectively pulping and mixing the surface paper pulp, the core paper pulp and the bottom paper pulp by a pulper, screening and pulping by a pulping machine, and then feeding the mixture into a head box of a three-paper-folded net forming paper machine;
II. Papermaking and compounding in the wire part of a paper machine to produce paper with a three-layer structure of surface paper, core paper and bottom paper; the pulp-net speed ratios of the three-layer forming net of the surface paper, the core paper and the bottom paper are respectively as follows: 0.964 to 0.984, 0.923 to 0.965 and 0.905 to 0.960;
III, entering a pressing part of a paper machine, and performing four-pass pressing; the pressure range of the first press is as follows: 90-110 kN/m; the pressure range of the second press is as follows: 150-180 kN/m; the pressure range of the third press is as follows: 600-750 kN/m; the pressure range of the fourth pressing is as follows: 40-60 kN/m;
IV, drying, surface sizing, entering a belt press calender for belt press polishing, wherein the pressure of the belt press polishing is adjusted to 15-45 kN/m; obtaining base paper;
v, dissolving 10-12 parts by weight of sodium sulfate in water to prepare a solution with the mass concentration of 25-30%, dispersing 25-35 parts by weight of mineral fibers in the sodium sulfate solution, dispersing for 10-15 minutes at the stirring speed of 1200-2400 rpm to form slurry, adding sulfuric acid to adjust the pH of the slurry to 2-5, slowly adding 15-20 parts by weight of barium carbonate, uniformly coating the gradually formed precipitated barium sulfate on the surface of the mineral fibers, and filtering to dry for later use;
VI, stirring the mineral fiber coated by the precipitated barium sulfate obtained in the step V, 20-40 parts by weight of stripping soil, 20-50 parts by weight of kaolin, 12-20 parts by weight of high polymer, 3-6 parts by weight of stiffening agent and 0.5-1 part by weight of lubricant in a mixer at a high speed for 30-35 minutes, and obtaining the coating after the mixing temperature is 90-110 ℃;
VII, coating a base paper by a coating machine, coating a precoating layer on the surface of the surface paper by the coating machine, coating a surface coating layer on the precoating layer, and coating a back coating layer on the bottom surface of the base paper;
VIII, coiling the paper obtained in the step VII, and then pressing the paper by using a calendaring hot press so as to enable the paper to be smooth and glossy.
2. The high stiffness coated paper and the process for producing the same according to claim 1, wherein the face paper is made of bleached chemical wood pulp; the core paper is made of unbleached native wood pulp; the base paper is made of unbleached native wood pulp.
3. The high-stiffness coated paper and the production process thereof according to claim 1, wherein the preparation process of the birch pulp comprises the following steps: the coating layer comprises a top coating layer, a precoating layer and a back coating layer, wherein the top coating layer is coated on the surface layer of the precoating layer, the precoating layer is coated on the surface layer of the surface paper, and the back coating layer is coated on the surface of the backing paper.
4. The coated paper and the process for producing the same according to claim 1, wherein the mineral fiber is at least one of brucite fiber, fly ash fiber, wollastonite fiber, calcium carbonate fiber and sepiolite fiber.
5. The high-stiffness coated paper and the production process thereof according to claim 1, wherein the exfoliated soil and the kaolin are fine powder with the particle size of 1800-2500 meshes.
6. The coated paper with high stiffness and the production process thereof according to claim 1, wherein the high polymer is at least one of polyethylene terephthalate, polybutylene terephthalate and polyvinyl chloride.
7. The high stiffness coated paper and the process for producing the same according to claim 1, wherein the stiffening agent comprises at least one of core-shell type cationic polyacrylate, core-shell type cationic polyvinyl acetate, and core-shell type cationic polyamide polyurea resin.
8. The coated paper and the process for producing the same as claimed in claim 1, wherein the lubricant is at least one of stearate and glyceryl monostearate, and the lubricant having a polarity promotes the adhesion of the coating to the surface layers of the face paper and the base paper and also facilitates the adhesion between the precoat layer and the face coating layer.
9. The high-stiffness coated paper and the production process thereof as claimed in claim 1, wherein the coating weight of the precoat and the back coating is controlled to be 2.0-3.5 g/m2The coating weight of the top coating is controlled to be 1.0-2.0 g/m2And controlling the drying temperature of the coating machine to be 140-160 ℃.
10. The high-stiffness coated paper and the production process thereof as claimed in claim 1, wherein the adhesive among the face paper, the core paper and the base paper is prepared by mixing starch, flaky calcium carbonate, polyvinyl alcohol, melamine resin and water in a mass ratio of 7: 3: 1: 30-35.
CN202110363336.4A 2021-04-02 2021-04-02 High-stiffness coated paper and production process thereof Pending CN113005819A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912690A (en) * 2012-10-31 2013-02-06 珠海经济特区红塔仁恒纸业有限公司 Liquid packing paper with high stiffness and production technology thereof
CN105419500A (en) * 2015-10-30 2016-03-23 成都新柯力化工科技有限公司 Coating liquid for composite white cardboard and preparation method thereof
CN105482300A (en) * 2015-12-23 2016-04-13 成都新柯力化工科技有限公司 High-stiffness composite packaging paper and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912690A (en) * 2012-10-31 2013-02-06 珠海经济特区红塔仁恒纸业有限公司 Liquid packing paper with high stiffness and production technology thereof
CN105419500A (en) * 2015-10-30 2016-03-23 成都新柯力化工科技有限公司 Coating liquid for composite white cardboard and preparation method thereof
CN105482300A (en) * 2015-12-23 2016-04-13 成都新柯力化工科技有限公司 High-stiffness composite packaging paper and preparation method thereof

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