CN111040512A - Water-based flexographic printing ink for thin film printing and preparation method thereof - Google Patents
Water-based flexographic printing ink for thin film printing and preparation method thereof Download PDFInfo
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- CN111040512A CN111040512A CN201911370333.2A CN201911370333A CN111040512A CN 111040512 A CN111040512 A CN 111040512A CN 201911370333 A CN201911370333 A CN 201911370333A CN 111040512 A CN111040512 A CN 111040512A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
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- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention relates to the technical field of water-based ink for flexible plates, and discloses water-based flexible plate ink for film printing, which comprises the following components in percentage by mass: 25-40% of soft film-forming water-based acrylic resin emulsion; 10-25% of quick-drying alkali-soluble acrylic resin liquid; 2-5% of polyethylene wax; 1-2% of an adhesion promoter; 1-3% of a cross-linking agent; 2-5% of water; 0.1-0.5% of defoaming agent; the semi-finished product A20-50%; wherein the semi-finished product A comprises the following components in percentage by mass: 25-40% of quick-drying alkali-soluble acrylic resin liquid; 30-40% of pigment; 0.1-0.5% of defoaming agent; 1-3% of a dispersant; 15-30% of water. The preparation method of the water-based flexographic ink is simple and environment-friendly; the printing ink has good adhesiveness and wear resistance, solvent resistance and weather resistance, good scratch resistance and high printing and drying speed, can partially replace and be applied to the field of film surface printing of gravure-to-flexography, and has wide market application space prospect.
Description
Technical Field
The invention relates to the technical field of water-based ink for flexible plates, in particular to water-based flexible plate ink for film printing and a preparation method thereof.
Background
At present, most of the printing of films (flexible packages) in China is mainly gravure solvent type ink due to the requirements on printing effect, ink adhesion, printing speed and the like in film printing. The gravure solvent-based ink inevitably uses toluene or ester solvent which is not environment-friendly, toxic and harmful. On one hand, the method not only has influence on physical and psychological health of workers, but also brings challenges to safety production of enterprises; on the other hand, the method is not suitable for new environmental protection laws and policies, and can generate larger residual peculiar smell of the solvent on the printed product to pollute packaged goods. After the new discharge standard of the VOCs is released, the industry needs to be upgraded, and the discharge of the VOCs is reduced or controlled.
Therefore, there is a trend to transfer solvent gravure to water gravure in the printing of films (flexible packages). In the field of paper printing, the water-based ink currently occupies a dominant position, but in the field of film printing, because the water absorption of a film is poorer than that of paper, the drying speed of the water-based ink is slow, and in addition, the defects of poor overprinting effect, low printing efficiency, weak adhesive force and the like exist, so that the application and popularization of the water-based ink in the film printing are influenced.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the water-based flexographic ink for the film printing, which has the advantages of high drying speed, good overprinting effect, good printing effect and strong adhesive force, and can assist the development of the flexographic printing in the field of flexible packaging.
In order to achieve the purpose, the invention adopts the following technical scheme:
the water-based flexographic ink for film printing comprises the following components in percentage by mass: 25-40% of soft film-forming water-based acrylic resin emulsion; 10-25% of quick-drying alkali-soluble acrylic resin liquid; 2-5% of polyethylene wax; 1-2% of an adhesion promoter; 1-3% of a cross-linking agent; 2-5% of water; 0.1-0.5% of defoaming agent; the semi-finished product A20-50%; wherein the semi-finished product A comprises the following components in percentage by mass: 25-40% of quick-drying alkali-soluble acrylic resin liquid; 30-40% of pigment; 0.1-0.5% of defoaming agent; 1-3% of a dispersant; 15-30% of water.
Preferably, the quick-drying alkali-soluble acrylic resin liquid has a molecular weight of 15000-17000 Mw and a solid content of 30-40%.
Preferably, the Tg of the soft film-forming water-based acrylic emulsion is-30 to-10 ℃, and the solid content is 30 to 40 percent.
Preferably, the polyethylene wax is an aqueous dispersion of wax powder, and the solid content is 40-50%.
Preferably, the adhesion promoter is a surfactant, such as tego 6020.
Preferably, the crosslinking agent is an ammonium salt compound.
Preferably, the water is purified water passing through a reverse osmosis filter device, and the pH value is: 6.5 to 7.5.
Preferably, the defoaming agent is a silicone defoaming agent.
Preferably, the dispersant is a non-ionic high-efficiency dispersant.
Preferably, the pigment is organic pigment and part of inorganic pigment (such as phthalocyanine blue, carbon black and titanium pigment).
The invention also discloses a preparation method of the water-based flexographic ink, which comprises the following steps:
(1) putting the components in the formula of the semi-finished product A into a proportioning cylinder, stirring and mixing uniformly, and grinding until the fineness is less than or equal to 10um to obtain a semi-finished product A;
(2) and mixing other components in the formula of the water-based flexographic ink with the semi-finished product A, and uniformly stirring to obtain the water-based flexographic ink for film printing.
Compared with the prior art, the invention has the following beneficial effects:
1. the formula of the invention adopts the high molecular weight quick-drying alkali soluble acrylic resin liquid and the high-efficiency dispersant to grind into the semi-finished product A color paste, which can improve the dispersibility and stability of the grinding pigment. The color paste is dried quickly, and a compact film layer is formed on the surface after the surface is dried, so that the waterproof effect is improved.
2. According to the formula, the soft film-forming water-based acrylic emulsion with a lower glass temperature (Tg) and functional auxiliaries such as an adhesion promoter and a self-crosslinking agent are properly matched, so that the water resistance, the adhesion and the scratch resistance of the ink are integrally improved. The water-based flexible printing ink is quick to dry and can be suitable for high-speed printing; the film has good film forming property, smooth surface and strong adhesiveness, is not easy to generate adhesion after printing, and can achieve better adhesion and scratch resistant effect on film substrates such as PE, OPP, PET and the like which are subjected to surface corona treatment.
3. The flexographic plate water-based ink takes water as a solvent, is safe and environment-friendly, has extremely low VOC emission, meets the requirements of national VOC emission standards, and has a large market development space for printing on a film by replacing gravure solvent-based ink with a flexographic plate printing mode in the future.
Detailed Description
The present invention will be further described with reference to the following examples.
It should be noted that the raw materials used in the technical scheme provided by the present invention, except for the specific description, are prepared by conventional means or purchased through commercial channels.
Example 1
The specific formula of the water-based flexographic ink for film printing is shown in the following table:
wherein, the formula of the semi-finished product A is shown in the following table:
| formulation components | Ratio (%) |
| Quick-drying alkali-soluble acrylic resin liquid HPD96 | 37.8 |
| Phthalocyanine blue pigment (15:3) | 35 |
| Silicone antifoamers (DC-65) | 0.2 |
| Dispersing agent (LY-5761) | 2 |
| Purified water | 25 |
| Total up to | 100 |
In the formula, the molecular weight of the quick-drying alkali-soluble acrylic resin liquid is 15000-17000 Mw, and the solid content is 30-40%. The Tg of the soft film-forming water-based acrylic emulsion is-30 to-10 ℃, and the solid content is 30 to 40 percent. The polyethylene wax is an aqueous dispersion of wax powder, and the solid content is 40-50%. The water is purified water passing through a reverse osmosis filter device, and the pH value is as follows: 6.5 to 7.5.
The preparation method of the water-based flexographic ink comprises the following steps:
(1) putting the components in the formula of the semi-finished product A into a batching cylinder, using a high-speed dispersion stirrer for 1h, uniformly mixing, and grinding by using a sand mill until the fineness is less than or equal to 10um to obtain a semi-finished product A;
(2) and mixing other components in the formula of the water-based flexographic ink with the semi-finished product A, dispersing and stirring uniformly at a high speed by a dispersion machine, and detecting that all detection indexes are qualified to obtain the water-based flexographic ink for film printing.
Example 2
The specific formula of the water-based flexographic ink for film printing is shown in the following table:
| formulation components | Mass percent (%) |
| Soft film-forming waterborne acrylic resin emulsion (J624) | 35 |
| Quick-drying alkali soluble acrylic resin liquid (HPD96) | 12.4 |
| Polyethylene wax (LB-6340) | 3 |
| Adhesion promoter (tego6020) | 1.5 |
| Crosslinking agent (Zinc oxide solution) | 1.0 |
| Purified water | 2 |
| Silicone antifoamers (DC-65) | 0.1 |
| Semi-finished product A | 45 |
| Total up to | 100 |
Wherein, the formula of the semi-finished product A is shown in the following table:
| formulation components | Ratio (%) |
| Quick-drying alkali soluble acrylic resin liquid (HPD96) | 37.8 |
| Magenta pigment (57:1) | 35 |
| Silicone antifoamers (DC-65) | 0.2 |
| Dispersing agent (LY-5761) | 2 |
| Purified water | 25 |
| Total up to | 100 |
In the formula, the molecular weight of the quick-drying alkali-soluble acrylic resin liquid is 15000-17000 Mw, and the solid content is 30-40%. The Tg of the soft film-forming water-based acrylic emulsion is-30 to-10 ℃, and the solid content is 30 to 40 percent. The polyethylene wax is an aqueous dispersion of wax powder, and the solid content is 40-50%. The water is purified water passing through a reverse osmosis filter device, and the pH value is as follows: 6.5 to 7.5.
The preparation method of the water-based flexographic ink is the same as that of example 1.
Example 3
The specific formula of the water-based flexographic ink for film printing is shown in the following table:
wherein, the formula of the semi-finished product A is shown in the following table:
| formulation components | Ratio (%) |
| Quick-drying alkali soluble acrylic resin liquid (HPD96) | 37.8 |
| Benzidine yellow pigment (Y14) | 35 |
| Silicone antifoamers (DC-65) | 0.2 |
| Dispersing agent (LY-5761) | 2 |
| Purified water | 25 |
| Total up to | 100 |
In the formula, the molecular weight of the quick-drying alkali-soluble acrylic resin liquid is 15000-17000 Mw, and the solid content is 30-40%. The Tg of the soft film-forming water-based acrylic emulsion is-30 to-10 ℃, and the solid content is 30 to 40 percent. The polyethylene wax is an aqueous dispersion of wax powder, and the solid content is 40-50%. The water is purified water passing through a reverse osmosis filter device, and the pH value is as follows: 6.5 to 7.5.
The preparation method of the water-based flexographic ink is the same as that of example 1.
Example 4
The specific formula of the water-based flexographic ink for film printing is shown in the following table:
wherein, the formula of the semi-finished product A is shown in the following table:
| formulation components | Ratio (%) |
| Quick-drying alkali soluble acrylic resin liquid (HPD96) | 37.8 |
| Carbon black pigment (7) | 35 |
| Defoaming agent (DC-65) | 0.2 |
| Dispersing agent (LY-5761) | 2 |
| Purified water | 25 |
| Total up to | 100 |
In the formula, the molecular weight of the quick-drying alkali-soluble acrylic resin liquid is 15000-17000 Mw, and the solid content is 30-40%. The Tg of the soft film-forming water-based acrylic emulsion is-30 to-10 ℃, and the solid content is 30 to 40 percent. The polyethylene wax is an aqueous dispersion of wax powder, and the solid content is 40-50%. The water is purified water passing through a reverse osmosis filter device, and the pH value is as follows: 6.5 to 7.5.
The preparation method of the water-based flexographic ink is the same as that of example 1.
Example 5
The specific formula of the water-based flexographic ink for film printing is shown in the following table:
wherein, the formula of the semi-finished product A is shown in the following table:
| formulation components | Ratio (%) |
| Quick-drying alkali soluble acrylic resin liquid (HPD96) | 37.8 |
| Phthalocyanine blue pigment (53:1) | 35 |
| Defoaming agent (DC-65) | 0.2 |
| Dispersing agent (LY-5761) | 2 |
| Purified water | 25 |
| Total up to | 100 |
In the formula, the molecular weight of the quick-drying alkali-soluble acrylic resin liquid is 15000-17000 Mw, and the solid content is 30-40%. The Tg of the soft film-forming water-based acrylic emulsion is-30 to-10 ℃, and the solid content is 30 to 40 percent. The polyethylene wax is an aqueous dispersion of wax powder, and the solid content is 40-50%. The water is purified water passing through a reverse osmosis filter device, and the pH value is as follows: 6.5 to 7.5.
The preparation method of the water-based flexographic ink is the same as that of example 1.
After detection, the performance indexes of the aqueous flexographic inks prepared in examples 1 to 5 are shown in the following table:
the formula of the invention adopts the high molecular weight quick-drying alkali soluble acrylic resin liquid and the high-efficiency dispersant to grind into the semi-finished product A color paste, which can improve the dispersibility and stability of the grinding pigment. The color paste is dried quickly, and a compact film layer is formed on the surface after the surface is dried, so that the waterproof effect is improved.
According to the formula, the soft film-forming water-based acrylic emulsion with a lower glass temperature (Tg) and functional auxiliaries such as an adhesion promoter and a self-crosslinking agent are properly matched, so that the water resistance, the adhesion and the scratch resistance of the ink are integrally improved. The water-based flexible printing ink is quick to dry and can be suitable for high-speed printing; the film has good film forming property, smooth surface and strong adhesiveness, is not easy to generate adhesion after printing, and can achieve better adhesion and scratch resistant effect on film substrates such as PE, OPP, PET and the like which are subjected to surface corona treatment.
The overprinting effect of the traditional product is only 68-85%, the maximum overprinting effect of the four-color printing ink can reach 92%, and the screen expansion of four-color dots (50% of dots measured) can reach 74%.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (10)
1. The water-based flexographic ink for film printing is characterized by comprising the following components in percentage by mass: 25-40% of soft film-forming water-based acrylic resin emulsion; 10-25% of quick-drying alkali-soluble acrylic resin liquid; 2-5% of polyethylene wax; 1-2% of an adhesion promoter; 1-3% of a cross-linking agent; 2-5% of water; 0.1-0.5% of defoaming agent; the semi-finished product A20-50%; wherein the semi-finished product A comprises the following components in percentage by mass: 25-40% of quick-drying alkali-soluble acrylic resin liquid; 30-40% of pigment; 0.1-0.5% of defoaming agent; 1-3% of a dispersant; 15-30% of water.
2. The aqueous flexographic ink for film printing according to claim 1, characterized in that the molecular weight of the quick-drying alkali-soluble acrylic resin solution is 15000 to 17000Mw and the solid content is 30 to 40 percent.
3. The aqueous flexographic ink for film printing according to claim 1, characterized in that the Tg of the soft film-forming aqueous acrylic emulsion is-30 to-10 ℃ and the solid content is 30 to 40%.
4. The aqueous flexographic ink for film printing according to claim 1, wherein said polyethylene wax is an aqueous dispersion of wax powder having a solid content of 40 to 50%.
5. The aqueous flexographic ink for thin film printing according to claim 1, wherein said adhesion promoter is a surfactant.
6. The aqueous flexographic ink for film printing according to claim 1 wherein said crosslinking agent is an ammonium salt.
7. The aqueous flexographic ink for film printing according to claim 1, wherein said water is purified water passed through a reverse osmosis filtration device, and has a pH value: 6.5 to 7.5.
8. The aqueous flexographic ink for film printing according to claim 1, characterized in that said defoamer is a silicone defoamer.
9. The aqueous flexographic ink for thin film printing according to claim 1, characterized in that said dispersant is a non-ionic high efficiency dispersant.
10. The method for preparing the aqueous flexographic ink according to any of claims 1 to 9, characterized in that it comprises the following steps:
(1) putting the components in the formula of the semi-finished product A into a proportioning cylinder, stirring and mixing uniformly, and grinding until the fineness is less than or equal to 10um to obtain a semi-finished product A;
(2) and mixing other components in the formula of the water-based flexographic ink with the semi-finished product A, and uniformly stirring to obtain the water-based flexographic ink for film printing.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112029340A (en) * | 2020-08-27 | 2020-12-04 | 深圳市明合发纸品有限公司 | Transparent water-based ink for printing flexible plate and preparation method thereof |
| CN112358763A (en) * | 2020-11-10 | 2021-02-12 | 东莞市神乐高分子科技有限公司 | Deplasticizing film-forming oil and preparation method thereof |
| CN112592622A (en) * | 2020-11-18 | 2021-04-02 | 鄢陵彩达油墨有限公司 | Quick-drying water-based environment-friendly ink and preparation method thereof |
| CN112759978A (en) * | 2021-01-19 | 2021-05-07 | 广东英科集团股份有限公司 | Water-based gravure ink for BOPP film inner printing and preparation method thereof |
| CN114045066A (en) * | 2021-11-12 | 2022-02-15 | 杭州卡丽佛装饰材料科技有限公司 | Quick-drying water-based ink, preparation method thereof and printing method |
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| CN106497222A (en) * | 2016-10-25 | 2017-03-15 | 中国印刷科学技术研究院 | A kind of full water-based plastic flexographic ink and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112029340A (en) * | 2020-08-27 | 2020-12-04 | 深圳市明合发纸品有限公司 | Transparent water-based ink for printing flexible plate and preparation method thereof |
| CN112358763A (en) * | 2020-11-10 | 2021-02-12 | 东莞市神乐高分子科技有限公司 | Deplasticizing film-forming oil and preparation method thereof |
| CN112592622A (en) * | 2020-11-18 | 2021-04-02 | 鄢陵彩达油墨有限公司 | Quick-drying water-based environment-friendly ink and preparation method thereof |
| CN112759978A (en) * | 2021-01-19 | 2021-05-07 | 广东英科集团股份有限公司 | Water-based gravure ink for BOPP film inner printing and preparation method thereof |
| CN114045066A (en) * | 2021-11-12 | 2022-02-15 | 杭州卡丽佛装饰材料科技有限公司 | Quick-drying water-based ink, preparation method thereof and printing method |
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Application publication date: 20200421 |