CN113863047A - Aqueous inkjet coating liquid for coated paper, and preparation method and application thereof - Google Patents
Aqueous inkjet coating liquid for coated paper, and preparation method and application thereof Download PDFInfo
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- CN113863047A CN113863047A CN202111119797.3A CN202111119797A CN113863047A CN 113863047 A CN113863047 A CN 113863047A CN 202111119797 A CN202111119797 A CN 202111119797A CN 113863047 A CN113863047 A CN 113863047A
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- coating liquid
- aqueous inkjet
- inkjet coating
- coated paper
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- 239000011248 coating agent Substances 0.000 title claims abstract description 66
- 238000000576 coating method Methods 0.000 title claims abstract description 66
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 40
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 22
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 19
- 125000002091 cationic group Chemical group 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 19
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 9
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims description 5
- 229910021485 fumed silica Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 22
- 230000001070 adhesive effect Effects 0.000 abstract description 22
- 239000000843 powder Substances 0.000 abstract description 7
- 238000007641 inkjet printing Methods 0.000 abstract description 3
- 239000000976 ink Substances 0.000 description 34
- 238000012360 testing method Methods 0.000 description 12
- 238000007639 printing Methods 0.000 description 10
- 238000009775 high-speed stirring Methods 0.000 description 7
- 239000006260 foam Substances 0.000 description 6
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 238000005580 one pot reaction Methods 0.000 description 4
- 239000008234 soft water Substances 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 241000750042 Vini Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000002401 inhibitory effect 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
- 239000002932 luster Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
- B41M5/504—Backcoats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
-
- 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
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
The invention provides an aqueous inkjet coating liquid for coated paper, which comprises polyvinyl alcohol, silicon dioxide, a cationic color fixing agent, potassium hydroxide, a defoaming agent and water in a certain ratio. The application provides a water-based ink-jet coating liquid for coated paper, through adopting the above-mentioned components of specific ratio for water-based ink-jet coating liquid can impel water-based ink-jet to fix fast, dry, the adhesion is good and do not have the phenomenon of falling powder, makes it when carrying out water-based ink-jet printing, has solved the coating and has blotted poor, the weak problem of adhesive force on the substrate.
Description
Technical Field
The invention relates to the technical field of printing, in particular to an aqueous inkjet coating liquid for coated paper, and a preparation method and application thereof.
Background
With the development of society, the demand of people for living environment is gradually increased, and the market of short-cut printing is rapidly increased in order to meet the requirement of environmental protection and the diversification of market demand. For short-run printing, digital printing is rapidly developed due to the advantage of rapidness, and the development of corresponding printing paper, especially water-based ink jet, is urgently needed according to the characteristics of digital printing.
The digital printing on the market is mainly divided into electrostatic imaging and ink jet imaging, wherein the contact mode of the electrostatic imaging and the ink jet imaging with paper is similar to offset printing, and the contact mode of the ink jet imaging with non-contact type fine spray head is mostly water-based ink jet, so that the requirements on the powder falling prevention of the paper and the ink receptivity of the water-based ink are more strict.
The aqueous ink-jet ink has less coloring material and less resin content, and most of the ink is water or alcohol organic solvent, which is generally alkali. Aqueous inkjet ink relies mainly on penetration to dry and cause adhesion, requires higher ink receptivity to paper than ordinary coated paper, and requires a coating with good ink receptivity.
Coated paper is also called coated printing paper and is called as powder paper in hong Kong and other areas. It is made up by coating white paint on base paper, and is mainly used for printing the front cover and insets of high-grade books and periodicals, colour picture, various exquisite commercial advertisement, sample, commercial package and trade mark, etc.. The base material conventionally utilizes fillers such as silicon dioxide, superfine kaolin, superfine calcium carbonate and the like to increase the void ratio, so that the digital water-based ink jet is promoted to be quickly dried, but the luster and the transparency of a printed matter are reduced, and the risk of powder falling is increased.
Disclosure of Invention
The invention aims to provide the aqueous inkjet coating liquid for coated paper, which can be quickly fixed and dried, has good adhesive force and does not have the phenomenon of powder falling.
In view of the above, the present application provides an aqueous inkjet coating liquid for coated paper, comprising, based on 100 parts by weight:
preferably, the alcoholysis degree of the polyvinyl alcohol is 99%, and the polymerization degree is 1700.
Preferably, the silicon dioxide is fumed silica, the granularity is 20-60 nm, the purity is 99.5-100%, and the specific surface area is 200-600 m2/g。
Preferably, the cationic color fixing agent is selected from polydiallyl dimethyl ammonium chloride, the solid content is 30-40%, the viscosity is 1000-1500 mPa.S, and the molecular weight is 4000-6000.
Preferably, the potassium hydroxide is a potassium hydroxide solution of 3 mol/L-5 mol/L, and the defoaming agent is an organic silicon defoaming agent.
Preferably, the content of the polyvinyl alcohol is 32 to 38 parts by weight.
Preferably, the content of the silica is 12 to 14 parts by weight.
The application also provides a preparation method of the aqueous inkjet coating liquid, which comprises the following steps:
stirring and mixing polyvinyl alcohol and water according to the raw material ratio, adding silicon dioxide, stirring again, and adding a cationic color fixing agent, potassium hydroxide and a defoaming agent to obtain the aqueous inkjet coating liquid.
Preferably, the stirring speed is 2000-3000 r/min, the re-stirring speed is 500-1000 r/min, and the time is 20-30 min.
The application also provides composite coated paper which comprises a coated paper substrate and a coating, wherein the coating is formed by the aqueous ink-jet coating liquid or the aqueous ink-jet coating liquid prepared by the preparation method.
The application provides an aqueous inkjet coating liquid for coated paper, which comprises polyvinyl alcohol, silicon dioxide, a cationic color fixing agent, potassium hydroxide, a defoaming agent and water; the polyvinyl alcohol has high binding power to the pigment in the ink-jet ink, the film forming capability is strong, excellent adhesive force can be given to the coating, and the silicon dioxide can form a microporous structure on the surface of paper, inhibit the migration of the ink to the X and Y directions and also play roles in fixing the ink and quickly drying; the cationic color fixing agent can change the electrification of the coating, so that the coating has the electric property opposite to that of the ink, and the cationic color fixing agent reacts with anionic dye in the ink by utilizing the electric charge attraction to form a water-insoluble complex compound, thereby achieving the ink fixing effect. Therefore, the aqueous inkjet coating solution for coated paper provided by the application can promote aqueous inkjet to be fast fixed, dry and have good adhesiveness and no powder falling phenomenon, so that the problems of poor ink absorption capacity and weak adhesive force of a coating on a substrate are solved when the aqueous inkjet printing is carried out.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
In view of the problems of poor adhesion and poor ink absorption of aqueous inkjet in the prior art, the application provides an aqueous coating liquid which can promote the rapid fixation and drying of aqueous inkjet and has good adhesion and no powder falling phenomenon, and also provides a preparation method of the aqueous coating liquid, so that the problems of poor ink absorption and poor adhesion of a coating on a substrate are solved when the aqueous inkjet printing is carried out. Specifically, the embodiment of the invention discloses an aqueous inkjet coating liquid for coated paper, which comprises the following components in parts by weight based on 100 parts by weight:
in the aqueous inkjet coating liquid provided by the present application, the polyvinyl alcohol (PVA1799) has an alcoholysis degree of 99% and a polymerization degree of 1700, and is specifically provided by the national petrifaction group, sichuan vini industries. The polyvinyl alcohol is a polyhydroxy alcohol with secondary hydroxyl groups at intervals of carbon atoms in the chemical structure, has high binding power to the pigment in the ink-jet ink and strong film forming capability, is used as an adhesive in a coating liquid, has the strongest binding power, and can endow a coating with excellent adhesive force. The content of the polyvinyl alcohol is 30-40 parts by weight, and more specifically, the content of the polyvinyl alcohol is 32-38 parts by weight.
The silica is particularlySelected from fumed silica, the particle size is 20-60 nm, the purity is 99.5-100%, and the specific surface area is 200-600 m2(ii) in terms of/g. The gas-phase silicon dioxide is silicon dioxide which is obtained by decomposing silicon in oxyhydrogen gas flow and has extremely high specific surface area and fluffy feeling; it has the advantages of small particle size, high purity, good dispersibility, etc. Meanwhile, the silicon dioxide can form a microporous structure on the surface of paper, can inhibit ink from migrating in the X and Y directions, and can also play a role in fixing the ink and quickly drying. The content of the silica is 10 to 15 parts by weight, and more specifically, the content of the silica is 12 to 14 parts by weight.
The cationic color fixing agent is poly diallyl dimethyl ammonium chloride (PDADMAC), the solid content is 40%, the viscosity is 1500mPa & S, the molecular weight is 4000-6000, and the cationic color fixing agent is specifically provided by Nanjing fine chemical industry Co., Ltd. The cationic color fixing agent can change the electrification of the coating, so that the coating has the electric property opposite to that of the ink, and forms a water-insoluble complex by utilizing the action of the electric attraction and the anionic dye in the ink, thereby achieving the ink fixing effect, preventing the permeation and diffusion of the ink, and greatly reducing the color mixing phenomenon among inks with different colors by adding the PDADMAC. The content of the cationic color fixing agent is 1-5 parts by weight, and more specifically, the content of the cationic color fixing agent is 1-3 parts by weight.
The potassium hydroxide is specifically a potassium hydroxide solution with the molar concentration of 3-5 mol/L. Most of the water-based ink-jet ink is anionic, and the fixation of the fumed silica to the dye in the ink can be enhanced by adding the fixed metal cations, so that the ink absorption performance of the ink-jet ink is improved. The content of the potassium hydroxide is 0.3 to 1 part by weight, and more specifically, the content of the potassium hydroxide is 0.5 to 0.8 part by weight.
The defoaming agent is specifically selected from silicone defoaming agents, which can eliminate bubbles generated in the preparation process of the coating and prevent the bubbles from influencing the rheological property of the coating; the surfactant has good spreading performance on a foam liquid film, can be quickly spread and unfolded on the surface of foam, and can discharge surfactant molecules with the stabilizing effect on the surface of the foam liquid film to break the foam, thereby achieving the effects of eliminating the foam and inhibiting the foam. The content of the defoaming agent is 0.01-0.1 weight part, specifically 0.05-0.1 weight part, more specifically 0.06-0.08 weight part.
The application also provides a preparation method of the aqueous inkjet coating liquid, which comprises the following steps:
stirring and mixing polyvinyl alcohol and water according to the raw material ratio, adding silicon dioxide, stirring again, and adding a cationic color fixing agent, potassium hydroxide and a defoaming agent to obtain the aqueous inkjet coating liquid.
The preparation of the aqueous ink-jet coating liquid adopts a one-pot boiling method, the stirring speed is 2000-3000 r/min, the re-stirring speed is 500-1000 r/min, and the time is 20-30 min.
More specifically, the method for preparing the aqueous inkjet coating liquid includes:
the method comprises the steps of putting polyvinyl alcohol and soft water into a container of a high-speed stirrer, starting normal-temperature high-speed stirring at the speed of 2500 revolutions per minute, adding silicon dioxide under the high-speed stirring condition, continuously stirring for 20 minutes, then reducing the stirring speed to 800 revolutions per minute, and sequentially adding a cationic color fixing agent, a potassium hydroxide solution and an antifoaming agent to obtain the aqueous ink-jet coating liquid.
The application also provides composite coated paper which comprises a coated paper substrate and a coating, wherein the coating is formed by the aqueous ink-jet coating liquid.
The coating liquid provided by the application is coated on a machine, the dry film thickness of the coating is 5 g/square meter, and a finished product with full color and good adhesive force can be obtained after printing.
For further understanding of the present invention, the following examples are given to illustrate the aqueous inkjet coating liquid, its preparation method and application, and the scope of the present invention is not limited by the following examples.
Example 1
The coating liquid is prepared by the method of 'one-pot boiling', placing 30 parts of polyvinyl alcohol and 58.65 parts of soft water in a container of a high-speed stirrer, starting normal-temperature high-speed stirring at the speed of 2500 revolutions per minute, adding 10 parts of silicon dioxide under the condition of high-speed stirring, continuously stirring for 20min, then reducing the stirring speed to 800 revolutions per minute, and sequentially adding 1 part of cationic color fixing agent, 0.3 part of potassium hydroxide solution and 0.05 part of defoaming agent.
The coating liquid is coated on a machine, the dry film thickness of the coating is 5 g/square meter, the color density and the adhesive force of a printed finished product are tested, the color density is tested by a color difference meter, and the color difference value is 0.62 delta E; the test standard of the adhesive force is GB/T5210-1985, and the test result is the adhesive force 0 grade.
Example 2
The coating liquid is prepared by the method of 'one-pot boiling', wherein 35 parts of polyvinyl alcohol and 50.42 parts of soft water are placed in a container of a high-speed stirrer, the container is started to be stirred at normal temperature and high speed, the speed is 2500 revolutions per minute, 12 parts of silicon dioxide are added under the condition of high-speed stirring, the stirring is continued for 20 minutes, then the stirring speed is reduced to 800 revolutions per minute, and 2 parts of cationic color fixing agent, 0.5 part of potassium hydroxide solution and 0.08 part of defoaming agent are sequentially added to obtain the coating liquid.
The coating liquid is coated on a machine, the dry film thickness of the coating is 5 g/square meter, the color density and the adhesive force of a printed finished product are tested, the color density is tested by a color difference meter, and the color difference value is 0.56 delta E; the test standard of the adhesive force is GB/T5210-1985, and the test result is the adhesive force 0 grade.
Example 3
The coating liquid is prepared by the method of 'one-pot boiling', 40 parts of polyvinyl alcohol and 40.9 parts of soft water are placed in a container of a high-speed stirrer, the normal-temperature high-speed stirring is started, the speed is 2500 revolutions per minute, 15 parts of silicon dioxide are added under the condition of the high-speed stirring, the stirring is continued for 20 minutes, then the stirring speed is reduced to 800 revolutions per minute, and 3 parts of cationic color fixing agent, 1 part of potassium hydroxide solution and 0.1 part of defoaming agent are sequentially added.
The coating liquid is coated on a machine, the dry film thickness of the coating is 5 g/square meter, the color density and the adhesive force of a printed finished product are tested, the color density is tested by a color difference meter, and the color difference value is 0.4 delta E; the test standard of the adhesive force is GB/T5210-1985, and the test result is the adhesive force 0 grade.
Comparative example 1
The preparation process provided in example 3 was used with the difference that: no cationic color fixing agent is added; the color density is tested by a color difference meter, and the color difference value is 1.5 delta E; the test standard of the adhesive force is GB/T5210-1985, and the test result is adhesive force grade 1.
Comparative example 2
The preparation process provided in example 3 was used with the difference that: potassium hydroxide is not added; the color density is tested by a color difference meter, and the color difference value is 1.2 delta E; the test standard of the adhesive force is GB/T5210-1985, and the test result is adhesive force grade 1.
Comparative example 3
The preparation process provided in example 3 was used with the difference that: changing the content of the silicon dioxide to 20 parts, and reducing the content of water to 35.9 parts; the color density is tested by a color difference meter, and the color difference value is 0.4 delta E; the test standard of the adhesive force is GB/T5210-1985, and the test result is adhesive force grade 1.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An aqueous inkjet coating liquid for coated paper, comprising, based on 100 parts by weight:
2. the aqueous inkjet coating liquid according to claim 1, wherein the degree of alcoholysis of the polyvinyl alcohol is 99% and the degree of polymerization is 1700.
3. The aqueous inkjet coating liquid according to claim 1, wherein the silica is fumed silica, has a particle size of 20 to 60nm, a purity of 99.5 to 100%, and a specific surface area of 200 to 600m2/g。
4. The aqueous inkjet coating liquid according to claim 1, wherein the cationic fixing agent is selected from polydiallyldimethylammonium chloride, has a solid content of 30 to 40%, a viscosity of 1000 to 1500 mPa-S, and a molecular weight of 4000 to 6000.
5. The aqueous inkjet coating liquid according to claim 1, wherein the potassium hydroxide is a potassium hydroxide solution of 3 to 5mol/L, and the defoaming agent is a silicone defoaming agent.
6. The aqueous inkjet coating liquid according to claim 1, wherein the polyvinyl alcohol is contained in an amount of 32 to 38 parts by weight.
7. The aqueous inkjet coating liquid according to claim 1, wherein the content of the silica is 12 to 14 parts by weight.
8. The method for preparing an aqueous inkjet coating liquid according to any one of claims 1 to 7, comprising the steps of:
stirring and mixing polyvinyl alcohol and water according to the raw material ratio, adding silicon dioxide, stirring again, and adding a cationic color fixing agent, potassium hydroxide and a defoaming agent to obtain the aqueous inkjet coating liquid.
9. The method according to claim 8, wherein the stirring speed is 2000-3000 r/min, the re-stirring speed is 500-1000 r/min, and the time is 20-30 min.
10. A composite coated paper comprising a coated paper substrate and a coating layer formed from the aqueous inkjet coating liquid according to any one of claims 1 to 7 or the aqueous inkjet coating liquid prepared by the preparation method according to any one of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111119797.3A CN113863047A (en) | 2021-09-24 | 2021-09-24 | Aqueous inkjet coating liquid for coated paper, and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111119797.3A CN113863047A (en) | 2021-09-24 | 2021-09-24 | Aqueous inkjet coating liquid for coated paper, and preparation method and application thereof |
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| CN113863047A true CN113863047A (en) | 2021-12-31 |
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| CN202111119797.3A Pending CN113863047A (en) | 2021-09-24 | 2021-09-24 | Aqueous inkjet coating liquid for coated paper, and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| EP4421133A1 (en) * | 2023-02-27 | 2024-08-28 | Evonik Operations GmbH | Aqueous preparation containing at least one aqueous hydrophobing agent for producing aqueous coating agents with improved early rain resistance |
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| CN114855502A (en) * | 2022-05-11 | 2022-08-05 | 北京山川物语科技有限公司 | Aqueous coating liquid for ink-jet digital printing paper and preparation method thereof |
| EP4421133A1 (en) * | 2023-02-27 | 2024-08-28 | Evonik Operations GmbH | Aqueous preparation containing at least one aqueous hydrophobing agent for producing aqueous coating agents with improved early rain resistance |
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