CN116180484A - Glass paperboard, paint for glass paperboard and preparation method - Google Patents
Glass paperboard, paint for glass paperboard and preparation method Download PDFInfo
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- CN116180484A CN116180484A CN202211714591.XA CN202211714591A CN116180484A CN 116180484 A CN116180484 A CN 116180484A CN 202211714591 A CN202211714591 A CN 202211714591A CN 116180484 A CN116180484 A CN 116180484A
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- calcium carbonate
- agent
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- coating
- pigment
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- 239000011521 glass Substances 0.000 title claims abstract description 66
- 239000011087 paperboard Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000003973 paint Substances 0.000 title claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 232
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 116
- 238000000576 coating method Methods 0.000 claims abstract description 83
- 239000011248 coating agent Substances 0.000 claims abstract description 82
- 239000004816 latex Substances 0.000 claims abstract description 62
- 229920000126 latex Polymers 0.000 claims abstract description 62
- 239000000049 pigment Substances 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 17
- 239000002174 Styrene-butadiene Substances 0.000 claims abstract description 7
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 7
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 7
- 239000011115 styrene butadiene Substances 0.000 claims abstract description 7
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 7
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 22
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 22
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 19
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 19
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 19
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 19
- 238000000227 grinding Methods 0.000 claims description 19
- 239000002270 dispersing agent Substances 0.000 claims description 18
- 239000000314 lubricant Substances 0.000 claims description 18
- 239000005871 repellent Substances 0.000 claims description 18
- 239000000123 paper Substances 0.000 claims description 17
- 230000002940 repellent Effects 0.000 claims description 15
- 238000012546 transfer Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 13
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- 239000013530 defoamer Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000005282 brightening Methods 0.000 claims description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 41
- 239000011148 porous material Substances 0.000 abstract description 15
- 238000011049 filling Methods 0.000 abstract description 8
- 239000002671 adjuvant Substances 0.000 abstract description 7
- 238000007639 printing Methods 0.000 abstract description 6
- -1 latexes Substances 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 9
- 239000003623 enhancer Substances 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 8
- 239000000976 ink Substances 0.000 description 7
- 239000006082 mold release agent Substances 0.000 description 7
- 238000005498 polishing Methods 0.000 description 6
- 239000011111 cardboard Substances 0.000 description 5
- 238000007641 inkjet printing Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The application discloses a glass paperboard, a coating for the glass paperboard and a preparation method, and relates to the technical field of papermaking. The present application includes pigments, latexes, and adjuvants; the pigment comprises heavy calcium carbonate and light calcium carbonate, and the mass ratio of the heavy calcium carbonate to the light calcium carbonate is 30-100:30-100; the mass ratio of the pigment to the latex is 100:20-30, and the latex comprises at least one of polyvinyl acetate latex, styrene butadiene latex and styrene acrylic latex. According to the method, the heavy calcium carbonate and the light calcium carbonate are matched, so that a good stacking effect is achieved among calcium carbonate particles, a coating with good microcosmic flatness is formed, and high gloss is further achieved; in addition, the glass paperboard has a good pore filling effect so as to meet the printing drying effect and the filling of latex, so that the microscopic flatness of the glass paperboard surface is further improved, and higher glossiness and mirror surface effect are presented.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to a glass paperboard, a coating for the glass paperboard and a preparation method.
Background
The glass paperboard can be coated with a layer of coating on a paper substrate in a cast coating or transfer coating mode, so that the paper has a high-gloss mirror effect.
With the development of post-processing technology, the demand of high-grade packages for high-gloss glass paperboard is increasing, and the packages are gradually developed from a UV code spraying mode to a more environment-friendly water code spraying mode. The coating on the prior glass paperboard cannot meet the drying requirement of high-speed water-based code spraying due to the poor pore structure.
Disclosure of Invention
An embodiment of the application provides a coating for a glass paperboard, which comprises pigment, latex and an auxiliary agent;
the pigment comprises heavy calcium carbonate and light calcium carbonate, wherein the mass ratio of the heavy calcium carbonate to the light calcium carbonate is 30-100:30-100;
the mass ratio of the pigment to the latex is 100:20-30, and the latex comprises at least one of polyvinyl acetate latex, styrene butadiene latex and styrene acrylic latex.
An embodiment of the application provides a glass paperboard, which comprises a paper substrate and a coating arranged on the paper substrate, wherein the coating of the coating adopts the coating.
An embodiment of the present application provides a method for preparing a coating for a glass cardboard, including:
grinding and dispersing heavy calcium carbonate in the pigment;
adding light calcium carbonate into the pigment in the grinding and dispersing process, wherein the mass ratio of the heavy calcium carbonate to the light calcium carbonate is 30-100:30-100;
after the grinding and dispersing process is finished, adding an auxiliary agent and latex, stirring and uniformly mixing, wherein the mass ratio of the pigment to the latex is 100:20-30, and the latex comprises at least one of polyvinyl acetate latex, styrene butadiene latex and styrene acrylic latex.
An embodiment of the present application provides a method for preparing a glass paperboard, including:
coating the paint on a transfer film, wherein the wet coating amount is 8-12gsm;
compounding the transfer film coated with the coating with a paper substrate;
and then drying and stripping the transfer film.
According to the method, the heavy calcium carbonate and the light calcium carbonate are matched, so that a good stacking effect is achieved among calcium carbonate particles, a coating with good microcosmic flatness is formed, and high gloss is further achieved; in addition, the glass paperboard has a good pore filling effect so as to meet the printing drying effect and the filling of latex, so that the microscopic flatness of the glass paperboard surface is further improved, and higher glossiness and mirror surface effect are presented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a glass jam according to some embodiments of the present application;
FIG. 2 is a graph showing the effect of 0.5s after aqueous code spraying on the glass paperboard in control 1;
FIG. 3 is a graph showing the effect of 1s of the glass paperboard in control 1 after being subjected to water-based code spraying;
FIG. 4 is a graph showing the effect of 0.5s after aqueous code spraying on the glass paperboard in control 2;
FIG. 5 is a graph showing the effect of 1s after water-based code spraying on the glass paperboard in control 2;
FIG. 6 is a graph showing the effect of 0.5s after the aqueous inkjet printing of the glass paperboard in example 1;
FIG. 7 is a graph showing the effect of 1s of the glass paperboard in example 1 after being subjected to water-based code spraying;
FIG. 8 is a graph showing the effect of 0.5s after the aqueous inkjet printing of the glass paperboard in example 2;
FIG. 9 is a graph showing the effect of 1s of the glass paperboard in example 2 after being subjected to water-based code spraying;
FIG. 10 is a graph showing the effect of 0.5s after the aqueous inkjet printing of the glass paperboard in example 3;
FIG. 11 is a graph showing the effect of 1s of the glass paperboard in example 3 after being subjected to water-based code spraying;
FIG. 12 is a graph showing the effect of 0.5s after the aqueous inkjet printing of the glass paperboard in example 4;
FIG. 13 is a graph showing the effect of 1s of the glass paperboard in example 4 after being subjected to water-based code spraying;
FIG. 14 is a flow chart of a method of preparing a coating in an embodiment of the present application;
fig. 15 is a flowchart of a method for preparing a glass paperboard according to an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustration of the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some, but not all, of the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Next, a glass jam will be described. The glass paperboard is a printing paperboard with a smooth and flat surface like glass. The glass cardboard can be used for occasions such as advanced packaging boxes, advanced cigarette packaging boxes, film coatings, medicine and cosmetic packages and the like, and will not be described in detail.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a glass paperboard according to some embodiments of the present application. The glazing 100 may include a paper substrate 10 and a coating 20 disposed in a stack with the paper substrate 10. The paper substrate 10 may be cardboard or coated paper, but may be other types of paper, and will not be described in detail. The coating 20 may be formed on the paper substrate 10 by a paint cast, transfer film coating, or the like, such that the glazing 100 exhibits a glossy specular effect, and printable functions such as aqueous inkjet.
The paint of the coating 20 may include pigments, latex, and adjuvants. The coating 20 may be fine in micro-flatness by packing and pore filling of particles in the pigment to exhibit high gloss. The coating 20 utilizes latex to fill small voids between pigment particles, while providing better micro-planarity, high gloss and specular effects. In the coating 20, the pigment and latex cooperate to form a greater and more uniform porosity. Furthermore, the pore structure of the coating 20 is more suitable for drying printing actions such as aqueous inkjet printing.
Pigments may include heavy calcium carbonate and light calcium carbonate. The heavy calcium carbonate can be irregularly shaped, has large particle size difference, has certain edges and corners and has rough surface. The light calcium carbonate may be prepared by controlling the shape of the calcium carbonate grains by controlling the reaction conditions in a manner well known to those skilled in the art. Further, the pigment can utilize the matching of the shape of heavy calcium carbonate and the shape of light calcium carbonate, so that the heavy calcium carbonate particles and the light calcium carbonate particles are mutually matched and stacked and the pores are filled, and the coating 20 has good microcosmic flatness so as to present high gloss.
In some embodiments, the mass ratio of heavy calcium carbonate to light calcium carbonate is 30-100:30-100.
In some embodiments, the pigment may include the following raw materials in parts by weight: 30-100 parts of heavy calcium carbonate and 30-100 parts of light calcium carbonate. In some embodiments, the weight fraction of heavy calcium carbonate is 30 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 35 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 40 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 45 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 50 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 55 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 60 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 65 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 70 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 75 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 80 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 85 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 90 parts. In some embodiments, the weight fraction of heavy calcium carbonate is 95 parts. In some embodiments, the parts by weight of heavy calcium carbonate is 100 parts. In some embodiments, the weight fraction of light calcium carbonate is 30 parts. In some embodiments, the weight fraction of light calcium carbonate is 35 parts. In some embodiments, the weight fraction of light calcium carbonate is 40 parts. In some embodiments, the weight fraction of light calcium carbonate is 45 parts. In some embodiments, the weight fraction of light calcium carbonate is 50 parts. In some embodiments, the weight fraction of light calcium carbonate is 55 parts. In some embodiments, the weight fraction of light calcium carbonate is 60 parts. In some embodiments, the weight fraction of light calcium carbonate is 65 parts. In some embodiments, the weight fraction of light calcium carbonate is 70 parts. In some embodiments, the weight fraction of light calcium carbonate is 75 parts. In some embodiments, the weight fraction of light calcium carbonate is 80 parts. In some embodiments, the weight fraction of light calcium carbonate is 85 parts. In some embodiments, the weight fraction of light calcium carbonate is 90 parts. In some embodiments, the weight fraction of light calcium carbonate is 95 parts. In some embodiments, the weight fraction of light calcium carbonate is 100 parts.
In some embodiments, the mass ratio of particles having a particle diameter of 2 μm or less in heavy calcium carbonate may be 98% or more.
In some embodiments, the mass ratio of particles having a particle size of 1 μm or less in the ground calcium carbonate is 80% or more.
In some embodiments, the light calcium carbonate may be prepared by controlling the reaction conditions in a manner well known to those skilled in the art to control the shape of the calcium carbonate grains to spindle shape to match the shape of the heavy calcium carbonate for packing and pore filling so that the coating 20 has good micro-flatness to exhibit high gloss.
In some embodiments, the light calcium carbonate particle size may be 0.5 μm to 1.0 μm to match the particle size, shape of the heavy calcium carbonate to pack and fill the pores so that the coating 20 is fine in micro-flatness to exhibit high gloss.
In some embodiments, the surface of the light calcium carbonate is rough, the specific surface area of the light calcium carbonate is larger than that of the heavy calcium carbonate, so that the oil absorption value of the light calcium carbonate is higher than that of the heavy calcium carbonate, and the light calcium carbonate is suitable for drying printing behaviors such as water-based code spraying and the like.
The latex fills the void structure between pigments such as heavy and light calcium carbonate, allowing for better micro-flatness of the coating 20, exhibiting higher gloss, and latex such as polymeric materials, more likely allows for a specular effect on the coating 20. Under the collocation of heavy calcium carbonate and light calcium carbonate, after the latex is filled, the pores formed by the coating 20 are more uniform, and the pore structure (micropore structure) of the coating 20 enables printing ink such as water-based code-spraying ink to generate certain imbibition during drying and permeation, so that the water-based code-spraying ink can be dried rapidly.
In some embodiments, the latex may include at least one of a polyvinyl acetate latex, a styrene butadiene latex, and a styrene acrylic latex. That is, at most two of the polyvinyl acetate latex, the styrene butadiene latex and the styrene acrylic latex may be omitted from the latex. In some embodiments, the latex has a particle size of 140-240nm and a Tg (glass transition temperature) of 10-30deg.C.
In some embodiments, the mass ratio of latex to pigment is 100:20-30. In some embodiments, the coating 20 may comprise the following raw materials in parts by weight: 100 parts of latex and 20-30 parts of pigment. In some embodiments, the pigment is present in 20 parts by mass. In some embodiments, the pigment is present in an amount of 22 parts by mass. In some embodiments, the pigment is present in an amount of 25 parts by mass. In some embodiments, the mass fraction of pigment is 27 parts. In some embodiments, the pigment is present in an amount of 30 parts by mass.
Adjuvants may include dispersants, defoamers, lubricants, water repellents, gloss enhancers, mold release agents, leveling agents, and the like. It will be appreciated that the adjuvant may be determined based on the preparation process of the coating 20 and the properties of the coating 20, and further, the composition of the adjuvant may be adjusted, for example, any one of a dispersant, a defoamer, a lubricant, a water-repellent agent, a gloss enhancer, a release agent, and a leveling agent may be determined to remain or be deleted based on the preparation process and the properties of the coating 20. For example, at least one of a dispersant, an antifoaming agent, a lubricant, a water repellent, a brightening agent, a releasing agent, and a leveling agent may be omitted.
In some embodiments, the mass ratio of pigment, dispersant, defoamer, lubricant, water repellent, gloss enhancer, release agent, and leveling agent is:
100:0.1-0.2:0.1-0.2:0.2-0.4:0.4-0.6:0.3-0.5:0.2-0.4:0.05-0.2。
in some embodiments, the coating 20 may comprise the following raw materials in parts by weight: 100 parts of pigment, 0.1-0.2 part of dispersing agent, 0.1-0.2 part of defoaming agent, 0.2-0.4 part of lubricant, 0.4-0.6 part of water repellent, 0.3-0.5 part of brightening agent, 0.2-0.4 part of release agent and 0.05-0.2 part of flatting agent. In some embodiments, the dispersant is 0.1 parts by mass. In some embodiments, the dispersant is 0.12 parts by mass. In some embodiments, the dispersant is 0.14 parts by mass. In some embodiments, the dispersant is 0.16 parts by mass. In some embodiments, the dispersant is 0.18 parts by mass. In some embodiments, the dispersant is 0.2 parts by mass. In some embodiments, the defoamer is 0.1 parts by mass. In some embodiments, the defoamer is 0.12 parts by mass. In some embodiments, the defoamer is 0.14 parts by mass. In some embodiments, the defoamer is 0.16 parts by mass. In some embodiments, the defoamer is 0.18 parts by mass. In some embodiments, the defoamer is 0.2 parts by mass. In some embodiments, the lubricant is 0.2 parts by mass. In some embodiments, the lubricant is 0.24 parts by mass. In some embodiments, the lubricant is 0.28 parts by mass. In some embodiments, the lubricant is 0.32 parts by mass. In some embodiments, the lubricant is 0.36 parts by mass. In some embodiments, the lubricant is 0.4 parts by mass. In some embodiments, the water repellent is 0.4 parts by mass. In some embodiments, the water repellent is 0.44 parts by mass. In some embodiments, the water repellent is 0.48 parts by mass. In some embodiments, the water repellent is 0.52 parts by mass. In some embodiments, the water repellent is 0.56 parts by mass. In some embodiments, the water repellent is 0.6 parts by mass. In some embodiments, the weight fraction of the gloss enhancer is 0.3 parts. In some embodiments, the weight fraction of the gloss enhancer is 0.34 parts. In some embodiments, the weight fraction of the gloss enhancer is 0.38 parts. In some embodiments, the weight fraction of the gloss enhancer is 0.42 parts. In some embodiments, the weight fraction of the gloss enhancer is 0.46 parts. In some embodiments, the weight fraction of the gloss enhancer is 0.5 parts. In some embodiments, the mold release agent is 0.2 parts by mass. In some embodiments, the mold release agent is 0.24 parts by mass. In some embodiments, the mold release agent is 0.28 parts by mass. In some embodiments, the mold release agent is 0.32 parts by mass. In some embodiments, the mold release agent is 0.36 parts by mass. In some embodiments, the mold release agent is 0.4 parts by mass. In some embodiments, the leveling agent is 0.05 parts by mass. In some embodiments, the leveling agent is 0.1 parts by mass. In some embodiments, the leveling agent is 0.12 parts by mass. In some embodiments, the leveling agent is 0.14 parts by mass. In some embodiments, the leveling agent is 0.16 parts by mass. In some embodiments, the leveling agent is 0.18 parts by mass. In some embodiments, the leveling agent is 0.2 parts by mass.
In some embodiments, the adjunct can also include polyvinyl alcohol and carboxymethyl cellulose. Among them, polyvinyl alcohol has water absorption. Carboxymethyl cellulose has a relatively rigid structure and water absorption, so that the coating 20 forms a relatively good spatial three-dimensional structure. The combination of polyvinyl alcohol and carboxymethyl cellulose gives a synergistic effect. It will be appreciated that in some embodiments, one of the polyvinyl alcohol and the carboxymethyl cellulose may be omitted.
In some embodiments, the pigment to polyvinyl alcohol mass ratio is 100:0.2-0.4. In some embodiments, the coating 20 may comprise the following raw materials in parts by weight: pigment 100 parts, polyvinyl alcohol 0.2-0.4 parts. In some embodiments, the mass fraction of polyvinyl alcohol is 0.2 parts. In some embodiments, the mass fraction of polyvinyl alcohol is 0.24 parts. In some embodiments, the mass fraction of polyvinyl alcohol is 0.28 parts. In some embodiments, the mass fraction of polyvinyl alcohol is 0.32 parts. In some embodiments, the mass fraction of polyvinyl alcohol is 0.36 parts. In some embodiments, the mass fraction of polyvinyl alcohol is 0.4 parts.
In some embodiments, the mass ratio of pigment to carboxymethyl cellulose is 100:0.4-0.6. In some embodiments, the coating 20 may comprise the following raw materials in parts by weight: pigment 100 parts, carboxymethyl cellulose 0.4-0.6 parts. In some embodiments, the mass fraction of carboxymethyl cellulose is 0.4 parts. In some embodiments, the mass fraction of carboxymethyl cellulose is 0.44 parts. In some embodiments, the mass fraction of carboxymethyl cellulose is 0.48 parts. In some embodiments, the mass fraction of carboxymethyl cellulose is 0.52 parts. In some embodiments, the mass fraction of carboxymethyl cellulose is 0.56 parts. In some embodiments, the mass fraction of carboxymethyl cellulose is 0.6 parts.
In some embodiments, the alcoholysis degree of the polyvinyl alcohol is 98%, and the molecular weight is 10 ten thousand, however, the alcoholysis degree and the molecular weight of the polyvinyl alcohol can be adjusted by those skilled in the art, and the description is omitted.
In some examples, control experiments were performed and glass paper was produced as described in the examples above, and the following experimental data were only a few examples, and are specifically as follows:
referring to fig. 2-13, fig. 2 is an effect chart of 0.5s after the water-based code spraying of the glass paperboard in the control 1, fig. 3 is an effect chart of 1s after the water-based code spraying of the glass paperboard in the control 1, fig. 4 is an effect chart of 0.5s after the water-based code spraying of the glass paperboard in the control 2, fig. 5 is an effect chart of 1s after the water-based code spraying of the glass paperboard in the control 2, fig. 6 is an effect chart of 0.5s after the water-based code spraying of the glass paperboard in the embodiment 1, fig. 7 is an effect chart of 1s after the water-based code spraying of the glass paperboard in the embodiment 1, fig. 8 is an effect chart of 0.5s after the water-based code spraying of the glass paperboard in the embodiment 2, fig. 9 is an effect chart of 0.5s after the water-based code spraying of the glass paperboard in the embodiment 3, fig. 10 is an effect chart of 1s after the water-based code spraying of the glass paperboard in the embodiment 3, fig. 12 is an effect chart of 0.5s after the water-based code spraying of the glass paperboard in the embodiment 4, and fig. 13 is an effect of the water-based code spraying of the glass paperboard in the embodiment 4.
The comparison example and the embodiment and the effect diagram are combined, so that the following can be seen:
in comparative examples 1 and 2, the pigment bodies in comparative example 1 were different from those in comparative example 2, heavy calcium carbonate was used in comparative example 1, porcelain clay was used in comparative example 2, and the gloss of the coating on the glass cardboard in comparative example 1 was high. The aqueous code spraying effect on the coating on both the glass paperboard in comparative example 1 and comparative example 1 is very poor.
In comparative example 1 and example 1, the amount of latex in example 1 was reduced, and thus the filling of pigment voids by the latex was insufficient, but the porosity of the coating on the glass cardboard was increased, and thus the drying speed of the aqueous inkjet ink was increased, and in addition the mirror effect of the latex polymer material was reduced, so that the coating gloss was low.
In examples 1 and 2, examples 1 and 2 are different from the pigment main body in example 2, heavy calcium carbonate is used in example 1, light calcium carbonate is used in example 2, and the coating layer on the glass paperboard has higher glossiness due to the irregular particle morphology and small specific surface area of the heavy calcium carbonate in example 1, but the drying effect of the water-based code spraying is poor. In the embodiment 2, the light calcium carbonate is spindle-shaped and has a large specific surface area, so that the water-based code spraying effect on the glass paperboard is good, but the shape of the light calcium carbonate ensures that the coating formed after the particles are piled up has poor microcosmic flatness, so that the glossiness is low.
In examples 3 and 4, the heavy calcium carbonate and the light calcium carbonate are matched, the light calcium carbonate can effectively fill the pores of the heavy calcium carbonate to improve the micro flatness of the coating surface on the glass paperboard, and the glossiness of the coating can be improved to 85 degrees. Compared with the embodiment 1, the high specific surface area of the light calcium carbonate in the embodiment 3 and the embodiment 4 improves the porosity of the coating on the glass paperboard, so that the water-based code spraying and drying speed of the wake-up glass paperboard can be improved to 0.5s.
The paint in the application uses heavy calcium carbonate and light calcium carbonate as a main pigment body, and has better stacking and pore filling among calcium carbonate particles through reasonable collocation of the heavy calcium carbonate and the light calcium carbonate, so that a coating 20 with good micro flatness is formed and high gloss is presented. In addition, the latex with proper proportion fills small pores among calcium carbonate particles, so that the coating 20 has better microcosmic flatness and higher glossiness, and the latex polymer material has a mirror effect on the coating 20. The specific surface area of the small-particle-size calcium carbonate such as heavy calcium carbonate and light calcium carbonate is large, the pores formed by the coating 20 are more and more uniform after the latex is filled, and the micropore (pore) structure of the coating 20 ensures that ink such as water-based code-spraying ink generates certain imbibition during drying and permeation. For example, aqueous inkjet inks can dry rapidly.
In some embodiments, the solids content of the coating is 45-55% and the viscosity of the coating is 150-300cps.
Next, a method for preparing a coating material, which can be used for preparing the coating material for a glass paperboard as described above, will be described. Referring to fig. 14, fig. 14 is a flowchart of a method for preparing a coating according to an embodiment of the present application. The method may include:
step S1401: grinding and dispersing the heavy calcium carbonate in the pigment.
The heavy calcium carbonate in the present application can be referred to in the above examples. The instant application may employ a mill or grind dispenser or a paint mill or other form of milling equipment to grind and disperse the ground calcium carbonate. In some embodiments, the mill apparatus may have a mill dispersion speed of 1000rpm, although the mill dispersion speed may be adjusted according to mill dispersion processes known to those skilled in the art.
Step S1402: light calcium carbonate is added to the pigment during the milling and dispersing process.
In the grinding and dispersing process of the heavy calcium carbonate, the light calcium carbonate can be continuously and quantitatively added, other components of the pigment can also be added according to the composition of the pigment, and then the grinding and dispersing are continuously carried out until the pigment is uniformly mixed. That is, the pigment such as light calcium carbonate may be directly and entirely added to the grinding apparatus for grinding and dispersing, or the rate and timing of addition of the pigment such as light calcium carbonate may be determined by a grinding and dispersing process known to those skilled in the art. It will be appreciated that after the milling dispersion is completed, the individual components of the pigment will be mixed evenly.
The light calcium carbonate in the present application can be referred to in the above examples.
Step S1403: after the grinding and dispersing process is finished, adding the auxiliary agent and the latex, and stirring and uniformly mixing.
After the grinding and dispersing are finished, adding an auxiliary agent and latex into the pigment after the grinding and dispersing in grinding equipment or coating configuration equipment, and uniformly stirring. In some embodiments, the timing of addition of the adjuvants and latex may be in accordance with ways well known to those skilled in the art. In some embodiments, adjuvants and latexes can be found in the examples above. In some embodiments, a dispersing agent and a defoaming agent can be added to the pigment, stirred uniformly, then latex is added, stirred uniformly, then polyvinyl alcohol, carboxymethyl cellulose, a lubricant, a water repellent, a brightening agent, a release agent and a leveling agent are sequentially added, and stirred uniformly. In some embodiments, after adding the dispersant and defoamer, the dispersion may be continued until uniformly stirred. Of course, the polishing and dispersing may be carried out at a polishing and dispersing speed of 1000rpm for 2 minutes. Furthermore, the rotational speed and time of the polishing dispersion can be adjusted according to polishing processes known to those skilled in the art. In some embodiments, after the latex is added, dispersion may continue until stirring is uniform. Of course, the polishing and dispersing may be carried out at a polishing and dispersing rotation speed of 1000rpm for 5 minutes. Furthermore, the rotational speed and time of the polishing dispersion can be adjusted according to polishing processes known to those skilled in the art. In some embodiments, polyvinyl alcohol, carboxymethyl cellulose, a lubricant, a water repellent, a brightening agent, a release agent and a leveling agent are sequentially added, and grinding and dispersing in the above embodiments can be still adopted to uniformly stir, so that the preparation of the coating is completed. So that the solid content of the coating can be 45-55% and the viscosity of the coating can be 150-300cps.
A method for producing a glass paperboard is described. The method can prepare the glass paperboard shown in figure 1 by applying the coating in the embodiment. Referring to fig. 15, fig. 15 is a flowchart of a method for preparing a glass paperboard according to an embodiment of the disclosure. The method may include:
step S1501: the coating is applied to the transfer film.
The coatings in this application can be found in the examples described above. In some embodiments, the coating may be wet applied to a transfer film such as PET (Polyethylene Terephthalate ) or PP (Polypropylene) or the like. In some embodiments, the wet application amount of the coating on the transfer film is 8-12gsm.
Step S1502: the transfer film coated with the coating is compounded with the paper substrate.
The transfer film carrying the coating is compounded with the paper substrate, and the compound laminating pressure can be 2-4kg. Of course, the attaching process can be adjusted according to the knowledge of the person skilled in the art, and details are not described.
Step S1503: and then drying and stripping the transfer film.
The application is then dried/baked by a 4-stage oven, and the drying temperature can be 100 ℃, 105 ℃ and 110 ℃ in sequence. And (5) coiling after drying, and stripping the transfer film from the glass paperboard after 24 hours. The drying process of the drying box can also be adjusted according to the knowledge of the person skilled in the art, and details are not repeated.
The foregoing description is only exemplary embodiments of the present application, and is not intended to limit the scope of the patent application, but rather, the present application is intended to cover any equivalents of the structures or equivalent processes described in the specification and drawings, or any other related technical field, directly or indirectly, as may be included in the scope of the present application.
Claims (12)
1. A coating for a glass paperboard, which is characterized by comprising pigment, latex and an auxiliary agent;
the pigment comprises heavy calcium carbonate and light calcium carbonate, wherein the mass ratio of the heavy calcium carbonate to the light calcium carbonate is 30-100:30-100;
the mass ratio of the pigment to the latex is 100:20-30, and the latex comprises at least one of polyvinyl acetate latex, styrene butadiene latex and styrene acrylic latex.
2. The paint according to claim 1, wherein the heavy calcium carbonate has a particle size of not more than 2 μm and a particle size of not more than 1 μm and a particle size of not less than 80% respectively.
3. The coating according to claim 1 or 2, characterized in that the light calcium carbonate has a spindle shape and a particle size of 0.5 μm-1.0 μm.
4. The coating of claim 1, wherein the latex has a particle size of 140-240nm and a Tg of 10-30 ℃.
5. The coating according to claim 1, wherein the auxiliary agent comprises a dispersing agent, a defoaming agent, a lubricant, a water-repellent agent, a brightening agent, a releasing agent and a leveling agent, and the mass ratio of the pigment, the dispersing agent, the defoaming agent, the lubricant, the water-repellent agent, the brightening agent, the releasing agent and the leveling agent is 100:0.1-0.2:0.1-0.2:0.2-0.4:0.4-0.6:0.3-0.5:0.2-0.4:0.05-0.2.
6. The coating according to claim 1, wherein the auxiliary agent comprises polyvinyl alcohol and carboxymethyl cellulose, and the mass ratio of the pigment, the polyvinyl alcohol and the carboxymethyl cellulose is 100:0.2-0.4:0.4-0.6.
7. The coating of claim 6, wherein the polyvinyl alcohol has an alcoholysis of 98% and a molecular weight of 10 ten thousand.
8. The coating of claim 1, wherein the solids content of the coating is 45-55% and the viscosity of the coating is 150-300cps.
9. A glazing comprising a paper substrate and a coating disposed on the paper substrate, the coating being as claimed in any one of claims 1 to 8.
10. A method for preparing a coating for a glass paperboard, comprising:
grinding and dispersing heavy calcium carbonate in the pigment;
adding light calcium carbonate into the pigment in the grinding and dispersing process, wherein the mass ratio of the heavy calcium carbonate to the light calcium carbonate is 30-100:30-100;
after the grinding and dispersing process is finished, adding an auxiliary agent and latex, stirring and uniformly mixing, wherein the mass ratio of the pigment to the latex is 100:20-30, and the latex comprises at least one of polyvinyl acetate latex, styrene butadiene latex and styrene acrylic latex.
11. The method according to claim 10, wherein the auxiliary agent comprises a dispersant, a defoamer, a lubricant, a water repellent, a brightening agent, a release agent, a leveling agent, polyvinyl alcohol, and carboxymethyl cellulose, and the mass ratio of the pigment, the dispersant, the defoaming agent, the lubricant, the water repellent, the brightening agent, the release agent, the leveling agent, the polyvinyl alcohol, and the carboxymethyl cellulose is 100:0.1-0.2:0.1-0.2:0.2:0.2-0.4:0.4-0.6:0.3-0.5:0.2-0.4:0.05-0.2:0.2-0.4:0.4-0.6;
after the grinding and dispersing process is finished, adding the auxiliary agent and the latex, and uniformly stirring and mixing the materials, wherein the steps comprise:
after the grinding and dispersing process is finished, adding the dispersing agent and the defoaming agent, uniformly stirring, then adding the latex, uniformly stirring, then sequentially adding the polyvinyl alcohol, the carboxymethyl cellulose, the lubricant, the water repellent agent, the brightening agent, the release agent and the leveling agent, and uniformly stirring.
12. The preparation method of the glass paperboard is characterized by comprising the following steps:
applying the coating of any one of claims 1-8 to a transfer film in a wet application amount of 8-12gsm;
compounding the transfer film coated with the coating with a paper substrate;
and then drying and stripping the transfer film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211714591.XA CN116180484A (en) | 2022-12-27 | 2022-12-27 | Glass paperboard, paint for glass paperboard and preparation method |
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| CN202211714591.XA CN116180484A (en) | 2022-12-27 | 2022-12-27 | Glass paperboard, paint for glass paperboard and preparation method |
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| JP2014227634A (en) * | 2013-05-24 | 2014-12-08 | 北越紀州製紙株式会社 | Coated paper for printing |
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| CN107142784A (en) * | 2017-05-22 | 2017-09-08 | 宁波亚洲浆纸业有限公司 | Coating for the coating of the aqueous coding of cardboard |
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| JP2014227634A (en) * | 2013-05-24 | 2014-12-08 | 北越紀州製紙株式会社 | Coated paper for printing |
| JP2015057316A (en) * | 2013-08-13 | 2015-03-26 | 王子ホールディングス株式会社 | Coated paper for inkjet printing |
| CN104452441A (en) * | 2014-10-28 | 2015-03-25 | 金东纸业（江苏）股份有限公司 | Coating as well as preparation method and coated paper thereof |
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