CN112251074A - Bank printing liquid, Bank preparation method and ink-jet printer - Google Patents
Bank printing liquid, Bank preparation method and ink-jet printer Download PDFInfo
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- CN112251074A CN112251074A CN202010987913.2A CN202010987913A CN112251074A CN 112251074 A CN112251074 A CN 112251074A CN 202010987913 A CN202010987913 A CN 202010987913A CN 112251074 A CN112251074 A CN 112251074A
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- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 claims description 3
- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 claims description 3
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Images
Classifications
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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
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
-
- 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
- C09D11/30—Inkjet printing inks
-
- 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
- C09D11/30—Inkjet printing inks
- C09D11/36—Inkjet printing inks based on non-aqueous solvents
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention relates to the technical field of ink-jet printing, and particularly discloses a printing liquid for printing a Bank, which comprises ink, wherein the ink comprises the following components: 5% -30% of absorptive filler or light reflective filler; 15-30% of optical resin; 3-10% of a dispersion matrix; 0.5 to 3 percent of photoinitiator; 5-15% of thermosetting resin; and a solvent. Further, an ink jet printer and a method for preparing a Bank using the same are disclosed. The printing liquid provided by the invention can be suitable for printing out a Bank by an ink-jet printer, the Bank printed by the printing liquid has color or light reflection property, optical crosstalk between sub-pixels can be avoided, the selection of materials can meet the requirement of mu LED display, the preparation method is realized by an ink-jet printer, the process of printing the Bank once and heating the Bank once is realized, the multi-time lamination printing and heating method can meet the preparation of the Bank with large thickness, a printing area can be selected according to actual conditions, a pixel defining layer does not need to be prepared in the whole layer, resources are saved, and the working procedure is shortened.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to a Bank printing liquid, a Bank preparation method and an ink-jet printer.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The method for manufacturing the Organic Light Emitting Device (OLED) and the quantum dot light emitting device (QLED) by adopting solution processing is an important direction for the development of the future display technology due to the advantages of low cost, high productivity, easy realization of large size and the like. Among them, inkjet printing technology is considered as the most effective way to achieve low cost and large area full color display of OLED, QLED. The ink-jet printing technology is a process capable of directly patterning and depositing a thin film, and can realize efficient patterning processing on a flexible and large-area substrate. The ink-jet printing technology also has the advantages of high resolution, high automation degree, low cost, simple manufacturing process, high material utilization rate, small environmental pollution, suitability for manufacturing large-size screens and the like. However, there are a number of technical challenges to be overcome in printing technology, including inkjet printing devices, printing inks, and printing processes.
The inventor finds that at least the following problems exist in the existing ink-jet printing technology:
in terms of brightness, efficiency, power consumption, contrast, lifetime, response time, etc., the μ LED technology is expected to provide higher performance than the similar LED technology, has the advantage of becoming the next generation display technology, and has become a hot spot pursued by the academic and industrial circles.
The mu LED color display technology remains a technical problem, involving huge transfer and its cost. Focusing on the large-scale searching display, the quantum dot + mu LED can greatly reduce the preparation cost of huge transfer and repair, and simultaneously can reduce the difficulty of driving compensation circuits and algorithms corresponding to RGB three colors.
Quantum Dots (QDs) are the best solution for the color conversion of μ LEDs: its nanoscale particle size, high quantum yield, narrow luminescence spectrum, fast response time and compatibility with conventional processes (photolithography and inkjet printing processes) are advantages. Because the mu LED packaging process is easy to cause cross color among quantum dot sub-pixels, a common light shielding wall is BM (Blackmatrix), the BM is generally prepared by adopting a photoetching process, and the BM adopts the photoetching process to perform the following steps: the negative photoresist is realized by the processes of coating, pre-baking, exposure, development and post-baking, wherein the BM photoresist covers the whole luminescent layer after the mu LED is solidified in the coating process, and is pre-baked, after exposure, alkali liquor is used for development, and in the developing process, the alkali liquor is easy to corrode a functional layer of the mu LED to cause the reduction or failure of the optical efficiency of the mu LED, so that the mu LED luminescent layer is generally protected (a chip protective layer with the thickness of 8-10 microns) by coating and curing with low-shrinkage optical glue at present, and BM is prepared on the basis, so that a formed display device is easy to propagate in the chip protective layer due to the refractive indexes of different materials, and pixel optical crosstalk is easy to form.
How to obtain a better Bank and a preparation method has important significance.
Disclosure of Invention
The first purpose of the invention is to provide a printing liquid for printing a Bank, which solves the defect that the existing Bank material is not suitable for an ink-jet printer.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a printing fluid for printing banks comprising an ink comprising the following components: 5% -30% of absorptive filler or light reflective filler; 15-30% of optical resin; 3-10% of a dispersion matrix; 0.5 to 3 percent of photoinitiator; 5-15% of thermosetting resin; and a solvent.
Further, the absorptive filler includes nano carbon black, and the light reflective filler includes nano TiO2。
Further, the optical resin comprises one or more of dipentaerythritol hexaacrylate, epoxy methacrylate, trimethylolpropane triacrylate, 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate.
Further, the dispersion matrix comprises one or more of aliphatic urethane acrylate or modified epoxy acrylate oligomer with a molecular weight of less than 10000.
Further, the photoinitiator comprises one or more of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-acetone, a photoinitiator 754, 2-benzyl-2-dimethylamine-1- (4-morpholine benzyl phenyl) butanone, phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone and a photoinitiator 2022.
Further, the thermosetting resin comprises one or more of modified epoxy resin and modified hydroxy acrylic resin.
Further, the solvent comprises one or more of ethyl acetate, cyclohexane, benzene, acetonitrile.
Further, the viscosity of said ink is more than 15mN/m and less than 35mN/m, and the surface tension of said ink is less than 15 mPas.
The printing liquid can be suitable for printing banks in an ink-jet printer, the banks printed by the printing liquid have color or light reflection properties, optical crosstalk between sub-pixels can be avoided, and the material selection can meet the requirements of mu LED display.
The second object of the present invention is to provide a method for preparing a Bank in a display device, comprising the steps of:
preparing the printing liquid and filling the printing liquid into an ink-jet printer;
performing ink-jet printing on a region to be printed on the substrate by using an ink-jet printer to obtain a Bank;
thermally curing or UV curing the Bank;
performing secondary printing on the solidified Bank;
performing thermal curing or UV curing on the Bank after the secondary printing;
the above steps of printing and curing are repeated until the Bank reaches a predetermined thickness.
The method can selectively prepare the region Bank, does not need to prepare the whole pixel defining layer, and can meet the Bank printing requirement with large thickness.
The third purpose of the invention is to provide an ink-jet printer for realizing the Bank preparation method, which comprises a nozzle module and a substrate bearing table, wherein the nozzle module is provided with a UV curing device or the substrate bearing table is provided with a heating device, and the volume of the liquid drop of the nozzle module is less than 15 pL.
The printer can meet the requirement of multiple printing and curing steps of a Bank, and printing of a large-thickness Bank is achieved.
The invention has the beneficial effects that:
the printing liquid provided by the invention can be suitable for printing a Bank by an ink-jet printer, the Bank printed by the printing liquid has color or light reflection property, optical crosstalk between sub-pixels can be avoided, and the selection of materials can meet the requirement of mu LED display; further, the Bank preparation method provided by the invention is realized through an ink jet printer, the ink jet printer is provided with a UV curing device or a heating device, the printed Bank can be heated in time, and the process of heating the Bank once after printing is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic view of the thermal curing of the present invention;
FIG. 3 is a schematic view of the UV cure of the present invention;
FIG. 4 is a schematic representation of the multiple printing of the present invention.
Reference numerals:
10-UV curing device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
FIG. 1 is a flow chart of the preparation method of the present invention Bank.
Referring to fig. 1, the method specifically includes the following steps:
100. preparing printing liquid
The printing liquid comprises the following component materials: 5% -30% of absorptive filler or light reflective filler; 15-30% of optical resin; 3-10% of a dispersion matrix; 0.5 to 3 percent of photoinitiator; 5-15% of thermosetting resin; and a solvent, the printing fluid being prepared and then loaded into an ink jet printer;
200. print Bank
Carrying out ink-jet printing on a region needing to be printed on the substrate by using an ink-jet printer to obtain an uncured Bank;
300. curing Bank
Thermally curing the Bank, for example, fig. 2 illustrates that the uncured Bank is cured by means of thermal curing;
400. repeat printing
As shown in fig. 3, the Bank after curing is printed again, and the Bank after re-printing is cured until the Bank reaches a predetermined thickness, and then the printing is finished.
In another embodiment, the curing method may be UV curing, and curing is performed by ultraviolet irradiation, for example, fig. 4 is a method of curing uncured Bank by UV curing, which includes a UV curing device 10.
The Bank is prepared by adopting the printing mode, the printing can be selectively carried out according to the requirement, the whole layer of pixel defining layer does not need to be printed, the Bank preparation time and procedures are greatly reduced, the cost is saved, and the requirement of preparing the Bank with large thickness can be met by printing in a mode of once curing and once printing.
In one embodiment, the absorptive filler comprises nano-carbon black having a particle size of less than 2 microns and the light reflective filler comprises nano-TiO2. The component of the absorbent filler is preferably 10-25%. The use of such fillers can avoid pixel optical crosstalk.
In one embodiment, the optical resin comprises one or more of dipentaerythritol hexaacrylate, epoxy methacrylate, trimethylolpropane triacrylate, 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate.
In one embodiment, the dispersion matrix comprises one or more of an aliphatic urethane acrylate or a modified epoxy acrylate oligomer having a molecular weight less than 10000.
In one embodiment, the photoinitiator comprises one or more of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, photoinitiator 754, 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinebenzylphenyl) butanone, phenylbis (2,4, 6-trimethylbenzoyl) phosphine oxide, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone, and photoinitiator 2022. The photoinitiator functions to initiate curing.
In one embodiment, the thermosetting resin includes one or more of a modified epoxy resin, a modified hydroxy acrylic resin. The component is preferably 10-25%.
In one embodiment, the solvent comprises one or more of ethyl acetate, cyclohexane, benzene, acetonitrile, or a mixed solvent.
In an embodiment the viscosity of the ink is more than 15mN/m and less than 35mN/m, and the surface tension of the ink is less than 15 mPas. An ink having such properties can be suitably used for inkjet printing, and can realize multiple printing and curing.
The printing liquid can be suitable for printing banks in an ink-jet printer, the banks printed by the printing liquid have color or light reflection properties, optical crosstalk between sub-pixels can be avoided, and the material selection can meet the requirements of mu LED display.
In an embodiment, an inkjet printer is provided for implementing the Bank preparation method, and includes a nozzle module and a substrate supporting table, wherein the nozzle module is provided with a UV curing device or the substrate supporting table is provided with a heating device, and the volume of a nozzle droplet of the nozzle module is less than 15pL, preferably 1-10 pL. The ink-jet printer can meet the requirement of multiple printing and curing steps of a Bank, and realizes printing of the Bank with large thickness.
In summary, the method of the embodiment of the present invention can implement a procedure of printing a Bank once and heating the Bank once, and the method of multi-time stacked printing and heating can satisfy Bank preparation with a large thickness, and the printing area can be selected according to actual conditions, thereby saving resources and shortening processes. The printing liquid provided by the embodiment of the invention can be suitable for printing a Bank by an ink-jet printer, the Bank printed by the printing liquid has color or light reflection property, optical crosstalk among sub-pixels can be avoided, and the selection of materials can meet the requirement of mu LED display.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A printing fluid for printing banks, comprising an ink comprising the following components:
5% -30% of absorptive filler or light reflective filler;
15-30% of optical resin;
3-10% of a dispersion matrix;
0.5 to 3 percent of photoinitiator;
5-15% of thermosetting resin;
and a solvent.
2. The ink for printing banks according to claim 1, wherein the absorptive filler comprises nano carbon black and the light reflective filler comprises nano TiO2。
3. The ink for printing banks according to claim 1, wherein the optical resin comprises one or more of dipentaerythritol hexaacrylate, epoxy methacrylate, trimethylolpropane triacrylate, 1, 6-hexanediol diacrylate, tripropylene glycol diacrylate.
4. The ink for printing banks according to claim 1, wherein the dispersion matrix comprises one or more of aliphatic urethane acrylate or modified epoxy acrylate oligomer with molecular weight less than 10000.
5. The ink for printing banks according to claim 1, wherein the photoinitiator comprises one or more of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, photoinitiator 754, 2-phenylbenzyl-2-dimethylamine-1- (4-morpholine benzyl phenyl) butanone, phenylbis (2,4, 6-trimethylbenzoyl) phosphine oxide, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-propanone, and photoinitiator 2022.
6. The ink for printing banks according to claim 1, wherein the thermosetting resin comprises one or more of modified epoxy resin and modified hydroxy acrylic resin.
7. The ink for printing banks of claim 1, wherein the solvent includes one or more of ethyl acetate, cyclohexane, benzene, acetonitrile.
8. An ink for printing banks as claimed in claim 1, wherein the viscosity of said ink is more than 15mN/m and less than 35mN/m, and the surface tension of said ink is less than 15 mPas.
9. A preparation method for a Bank in a display device is characterized by comprising the following steps:
preparing a printing fluid according to any one of claims 1 to 7 for loading into an ink jet printer;
performing ink-jet printing on a region to be printed on the substrate by using an ink-jet printer to obtain a Bank;
thermally curing or UV curing the Bank;
performing secondary printing on the solidified Bank;
performing thermal curing or UV curing on the Bank after the secondary printing;
the above steps of printing and curing are repeated until the Bank reaches a predetermined thickness.
10. An inkjet printer for carrying out the method according to claim 9, comprising a nozzle module and a substrate carrier, the nozzle module being provided with a UV curing device or the substrate carrier being provided with a heating device, the nozzle module having a nozzle droplet volume of less than 15 pL.
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| Application Number | Priority Date | Filing Date | Title |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006189729A (en) * | 2005-01-07 | 2006-07-20 | Mitsubishi Pencil Co Ltd | Method for manufacturing electrophoretic display apparatus |
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- 2020-09-18 CN CN202010987913.2A patent/CN112251074A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006189729A (en) * | 2005-01-07 | 2006-07-20 | Mitsubishi Pencil Co Ltd | Method for manufacturing electrophoretic display apparatus |
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| 宋金英主编: "《油漆工快速入门》", 31 January 2009, 北京理工大学出版社 * |
| 杨铁军主编: "《产业专利分析报告 第46册 新型传感器》", 30 June 2016, 知识产权出版社 * |
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