CN113002202A - Preparation process of hydrophilic upper cover plate - Google Patents
Preparation process of hydrophilic upper cover plate Download PDFInfo
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- CN113002202A CN113002202A CN201911313508.6A CN201911313508A CN113002202A CN 113002202 A CN113002202 A CN 113002202A CN 201911313508 A CN201911313508 A CN 201911313508A CN 113002202 A CN113002202 A CN 113002202A
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- hydrophilic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/02—Letterpress printing, e.g. book printing
- B41M1/04—Flexographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers
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- Printing Plates And Materials Therefor (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a preparation process of a hydrophilic upper cover plate, which comprises the following steps: A. printing a bridging agent on the surface of the non-hydrophilic substrate by using a first printing roller of a flexographic printing machine to form a bridging agent layer; B. printing UV ink on the bridging agent layer by utilizing at least one second printing roller of the flexographic printing machine to form a UV ink color pattern layer; C. and printing the hydrophilic coating liquid on the surface of the non-hydrophilic base material and the surface area outside the bridging agent layer by using a third printing roller of the flexographic printing machine to form a hydrophilic layer. According to the invention, the color pattern layer and the hydrophilic layer of the hydrophilic cover plate are printed by using a flexographic printing process, and the traditional process of screen printing solvent type ink on the hydrophilic film is changed into the process of printing UV ink and hydrophilic coating by using a flexographic printing plate, so that the production efficiency is improved, the environment is not polluted, and the environment is more environment-friendly; the common non-hydrophilic base material is adopted, the cost is reduced, the production is not required to be carried out in a low-humidity environment with the temperature less than 40% RH, and the requirement of the production environment is reduced.
Description
Technical Field
The invention relates to the technical field of IVD test paper, in particular to a preparation process of a hydrophilic upper cover plate.
Background
In the quick diagnosis and examination of blood sugar, hemoglobin, uric acid and the like, the IVD test paper is widely used, the hydrophilic upper cover plate is used as a functional material in the IVD test paper, and the tested body fluid can be quickly absorbed and quickly diffused to a working detection area through the hydrophilic property of the hydrophilic upper cover plate so as to ensure the rapidness and the accuracy of the test.
The production process of hydrophilic cover sheets on the market at present is to screen print solvent-based ink on the surface of a hydrophilic film to form a color pattern layer. The process has the following disadvantages: the use of hydrophilic membranes as printing substrates is costly; the storage of the hydrophilic film and the printing environment need to be controlled under a low-humidity environment with the humidity of 40% RH or below; the hydrophilic film surface has poor inking property, the printing process mainly adopts screen printing to print solvent type ink on the hydrophilic film surface, the production efficiency is low, and the environment can be polluted.
Disclosure of Invention
The invention aims to provide a preparation process of a hydrophilic upper cover plate, which solves the problems of low production efficiency, high material cost, high requirements on production and storage environments, environmental pollution and the like caused by only adopting screen printing solvent type ink on a hydrophilic film in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows: a preparation process of a hydrophilic upper cover plate comprises the following steps:
A. printing a bridging agent on the surface of the non-hydrophilic substrate by using a first printing roller of a flexographic printing machine to form a bridging agent layer;
B. printing UV ink on the bridging agent layer by utilizing at least one second printing roller of the flexographic printing machine to form a UV ink color pattern layer;
C. and printing the hydrophilic coating liquid on the surface of the non-hydrophilic base material and the surface area outside the bridging agent layer by using a third printing roller of the flexographic printing machine to form a hydrophilic layer.
In the preparation process of the invention, before the step A, the preparation process further comprises a step A0: the surface to be printed of the non-hydrophilic substrate is subjected to corona treatment.
In the preparation process, the hydrophilic coating liquid comprises the following components in parts by mass: 5-15 parts of a mixture of polyvinyl alcohol and a polyethylene glycol polylactic acid copolymer, 3-10 parts of a composite surfactant, 3-15 parts of hydrophilic metal oxide particles, 5-15 parts of a silicon compound, 0-4 parts of an auxiliary agent, 25-70 parts of water and 0-50 parts of ethanol.
In the preparation process, the mass ratio of the polyvinyl alcohol to the polyethylene glycol polylactic acid copolymer in the mixture of the polyvinyl alcohol and the polyethylene glycol polylactic acid copolymer is 1: 5 to 15.
In the preparation process, the polylactic acid adopted in the polyethylene glycol polylactic acid copolymer is poly-racemic lactic acid formed by polymerizing D-lactic acid and L-lactic acid.
In the preparation process of the invention, the composite surfactant contains an anionic surfactant and a nonionic surfactant.
In the preparation process, the mass ratio of the anionic surfactant to the nonionic surfactant is 0.5-2: 1.
in the preparation process of the present invention, the hydrophilic metal oxide particles are nano-sized titanium dioxide particles.
In the preparation process of the invention, the silicon compound is tetraethoxysilane or silane.
In the preparation process of the invention, the auxiliary agent comprises a water-resistant accelerator and/or a defoaming agent.
The implementation of the preparation process of the hydrophilic upper cover plate has the following beneficial effects: according to the invention, the color pattern layer and the hydrophilic layer of the hydrophilic cover plate on the IVD test piece are printed by using a flexographic printing process, the traditional process of screen printing solvent type ink on the hydrophilic film is changed into a process of printing UV ink and water-based hydrophilic coating by using a flexographic printing process, compared with the screen printing process, the printing efficiency is improved by more than 5 times, the environment is not polluted, and the printing process is more environment-friendly; the cost is reduced by 90% by adopting a common non-hydrophilic base material; and the production is not needed in a low-humidity environment with the humidity less than 40% RH, the production environment requirement is reduced, and the problem that the traditional hydrophilic film needs to be stored and produced in a low-humidity environment with the humidity less than 40% RH is solved.
Detailed Description
The preparation process of the hydrophilic upper coversheet of the present invention will be further described with reference to the following examples:
the invention relates to a preparation process of a hydrophilic upper cover plate, which comprises the following steps:
s0, carrying out corona treatment on the surface to be printed of the non-hydrophilic substrate by using a corona device of a flexographic printing machine; wherein, the non-hydrophilic substrate refers to a substrate without a hydrophilic layer on the surface, and can be common plastic films (such as PET, PC, and the like), common rubber films, common paper films, and the like;
s1, printing a bridging agent on the surface of the non-hydrophilic substrate by using a first printing roller of a flexographic printing machine, and curing the bridging agent under the irradiation of UV light to form a bridging agent layer; wherein, the bridging agent is commonly used in the prior art, such as Junjie G006 bridging agent;
s2, printing UV ink on the bridging agent layer by using at least one second printing roller of the flexographic printing machine, and curing the UV ink under the irradiation of UV light to form a UV ink color pattern layer; the number of the second printing rollers is determined according to the number of colors to be printed by the UV ink, and each second printing roller is used for printing the UV ink of one color; the UV ink is formed by drying ink into a film by using ultraviolet light with different wavelengths and energies under the irradiation of ultraviolet light commonly used in the prior art;
and S3, printing a hydrophilic coating liquid on the surface of the non-hydrophilic substrate in the surface area outside the bridging agent layer by using a third printing roller of the flexographic printing machine to form a hydrophilic layer, namely printing the hydrophilic coating liquid on the surface of the non-hydrophilic substrate, printing the hydrophilic coating liquid on the area not printed with the bridging agent, and drying by hot air to form the hydrophilic layer.
And S4, die cutting and forming.
The printing substrate in the process adopts a non-hydrophilic film plastic substrate, the material cost is low, the printing substrate is only 1/8 of the traditional hydrophilic film printing substrate, the pattern printing efficiency by using the flexography is more than 5 times of that of the traditional (screen printing color pattern), and the whole process has no requirement on the environmental temperature and humidity.
It should be noted that the flexographic printing machine is an existing device in the prior art, and the detailed description of the specific structure is omitted.
In the prior art, because the surface of the hydrophilic layer of the hydrophilic film has poor ink adhesion, the manufacturing process of the hydrophilic upper cover plate mainly adopts a screen printing process to print solvent type ink on the surface of the hydrophilic film substrate. The hydrophilic coating liquid adopted in the step S3 can be used as printing ink, and the hydrophilic coating liquid and the UV ink are printed on the surface of a common non-hydrophilic substrate by a flexographic printing process to form a hydrophilic pattern and a color pattern, so that the region printed with the hydrophilic ink layer has an excellent hydrophilic effect, a hydrophilic film is not required to be used as the printing substrate, the production efficiency is improved, and the material cost is saved.
The hydrophilic coating liquid in the step S3 comprises the following components in parts by mass: 5-15 parts of a mixture of polyvinyl alcohol (PVA) and polyethylene glycol polylactic acid copolymer (PEG-PDLLA), 3-10 parts of a composite surfactant, 3-15 parts of hydrophilic metal oxide particles, 5-15 parts of a silicon compound, 0-4 parts of an auxiliary agent, 25-70 parts of water and 0-50 parts of ethanol.
Wherein in the mixture of polyvinyl alcohol (PVA) and polyethylene glycol polylactic acid copolymer (PEG-PDLLA), the mass ratio of the polyvinyl alcohol (PVA) to the polyethylene glycol polylactic acid copolymer (PEG-PDLLA) is 1: 5 to 15. Preferably, the mass ratio of the polyvinyl alcohol (PVA) to the polyethylene glycol polylactic acid copolymer (PEG-PDLLA) is 1: 10. the polylactic acid (PDLLA) used in the polyethylene glycol polylactic acid copolymer (PEG-PDLLA) is a poly-racemic lactic acid formed by polymerizing D-lactic acid and L-lactic acid. It should be noted that polyvinyl alcohol (PVA) and polyethylene glycol polylactic acid copolymer (PEG-PDLLA) are both existing products, such as polyvinyl alcohol (PVA) produced by Shanghai petrochemical company, Changchun chemical company, and the like, and polyethylene glycol polylactic acid copolymer (PEG-PDLLA) produced by sigma company.
The composite surfactant contains anionic surfactant and nonionic surfactant. The mass ratio of the anionic surfactant to the nonionic surfactant is 0.5-2: 1, preferably 1: 1. anionic surfactants include, but are not limited to, alkyl sulfonates, alkyl benzene sulfonates, fatty alcohol polyoxyethylene ether phosphate esters, alkyl phosphate ester diethanolamine salts, dilauryl phosphate sodium salt, and the like. Nonionic surfactants include, but are not limited to, hydroxyethylalkylamines, fatty amides, polyoxyethylenes, polyol esters, and the like.
The hydrophilic metal oxide particles are preferably nanoscale titanium dioxide particles.
The silicon compound is tetraethoxysilane or silane, wherein the silane is preferably monosilane.
The auxiliary agent comprises a water-resistant accelerator and/or a defoaming agent. The water-resistant accelerator may be phosphate ester, etc. Defoamers include, but are not limited to, organic polyether esters, alcohol amines, and the like.
The following is a detailed description of specific examples.
Example 1
Preparation of hydrophilic coating liquid: 25g of polyvinyl alcohol (PVA), 125g of polyethylene glycol polylactic acid copolymer (PEG-PDLLA), 34g of sodium dodecyl benzene sulfonate, 66g of polyoxyethylene lauryl ether, 150g of nano titanium dioxide particles, 150g of ethyl orthosilicate, 40g of phosphate and 700g of water are uniformly mixed to obtain the hydrophilic coating liquid.
The hydrophilic coating liquid prepared by the embodiment is arranged on a flexographic printing machine, and is smoothly transferred between printing rollers, the printing is complete, and the adhesion effect is good. The hydrophilic coating liquid prepared by the embodiment is used as the flexographic printing ink, and is printed on the surface of a common non-hydrophilic substrate by a flexographic printing process to form a hydrophilic pattern, so that the area printed with the hydrophilic layer has an excellent hydrophilic effect, a hydrophilic film is not required to be used as a printing substrate, and the adhesion of the hydrophilic layer on the substrate is good.
Example 2
Preparation of hydrophilic coating liquid: 3.2g of polyvinyl alcohol (PVA), 46.8g of polyethylene glycol polylactic acid copolymer (PEG-PDLLA), 20g of sodium dodecyl benzene sulfonate, 10g of polyoxyethylene lauryl ether, 30g of nano titanium dioxide particles, 50g of ethyl orthosilicate, 250g of water and 500g of ethanol are uniformly mixed to obtain the hydrophilic coating liquid.
The hydrophilic coating liquid prepared by the embodiment is arranged on a flexographic printing machine, and is smoothly transferred between printing rollers, the printing is complete, and the adhesion effect is good. The hydrophilic coating liquid prepared by the embodiment is used as the flexographic printing ink, and is printed on the surface of a common non-hydrophilic substrate by a flexographic printing process to form a hydrophilic pattern, so that the area printed with the hydrophilic layer has an excellent hydrophilic effect, a hydrophilic film is not required to be used as a printing substrate, and the adhesion of the hydrophilic layer on the substrate is good.
Example 3
Preparation of hydrophilic coating liquid: 10g of polyvinyl alcohol (PVA), 100g of polyethylene glycol polylactic acid copolymer (PEG-PDLLA), 25g of sodium dodecyl benzene sulfonate, 25g of polyoxyethylene lauryl ether, 100g of nano titanium dioxide particles, 100g of silane, 20g of phosphate, 20g of polyether ester defoaming agent, 500g of water and 250g of ethanol are uniformly mixed to obtain the hydrophilic coating liquid.
The hydrophilic coating liquid prepared by the embodiment is arranged on a flexographic printing machine, and is smoothly transferred between printing rollers, the printing is complete, and the adhesion effect is good. The hydrophilic coating liquid prepared by the embodiment is used as the flexographic printing ink, and is printed on the surface of a common non-hydrophilic substrate by a flexographic printing process to form a hydrophilic pattern, so that the area printed with the hydrophilic layer has an excellent hydrophilic effect, a hydrophilic film is not required to be used as a printing substrate, and the adhesion of the hydrophilic layer on the substrate is good.
Example 4
Preparation of hydrophilic coating liquid: 6g of polyvinyl alcohol (PVA), 60g of polyethylene glycol polylactic acid copolymer (PEG-PDLLA), 20g of sodium dodecyl benzene sulfonate, 20g of polyoxyethylene lauryl ether, 30g of nano titanium dioxide particles, 80g of silane, 2.5g of phosphate, 2.5g of polyether ester defoaming agent, 500g of water and 290g of ethanol are uniformly mixed to obtain the hydrophilic coating liquid.
The hydrophilic coating liquid prepared by the embodiment is arranged on a flexographic printing machine, and is smoothly transferred between printing rollers, the printing is complete, and the adhesion effect is good. The hydrophilic coating liquid prepared by the embodiment is used as the flexographic printing ink, and is printed on the surface of a common non-hydrophilic substrate by a flexographic printing process to form a hydrophilic pattern, so that the area printed with the hydrophilic layer has an excellent hydrophilic effect, a hydrophilic film is not required to be used as a printing substrate, and the adhesion of the hydrophilic layer on the substrate is good.
It will be appreciated that modifications and variations are possible to those skilled in the art in light of the above teachings and are within the purview of the appended claims.
Claims (10)
1. A preparation process of a hydrophilic upper cover plate is characterized by comprising the following steps:
A. printing a bridging agent on the surface of the non-hydrophilic substrate by using a first printing roller of a flexographic printing machine to form a bridging agent layer;
B. printing UV ink on the bridging agent layer by utilizing at least one second printing roller of the flexographic printing machine to form a UV ink color pattern layer;
C. and printing the hydrophilic coating liquid on the surface of the non-hydrophilic base material and the surface area outside the bridging agent layer by using a third printing roller of the flexographic printing machine to form a hydrophilic layer.
2. The process of claim 1, further comprising, before step a, step a 0: the surface to be printed of the non-hydrophilic substrate is subjected to corona treatment.
3. The preparation process according to claim 1, wherein the hydrophilic coating liquid comprises the following components in parts by mass: 5-15 parts of a mixture of polyvinyl alcohol and a polyethylene glycol polylactic acid copolymer, 3-10 parts of a composite surfactant, 3-15 parts of hydrophilic metal oxide particles, 5-15 parts of a silicon compound, 0-4 parts of an auxiliary agent, 25-70 parts of water and 0-50 parts of ethanol.
4. The preparation process according to claim 3, wherein the mass ratio of the polyvinyl alcohol to the polyethylene glycol polylactic acid copolymer in the mixture of the polyvinyl alcohol and the polyethylene glycol polylactic acid copolymer is 1: 5 to 15.
5. The preparation process according to claim 3, wherein the polylactic acid used in the polyethylene glycol polylactic acid copolymer is a poly-racemic lactic acid formed by polymerizing D-lactic acid and L-lactic acid.
6. The process according to claim 3, wherein the complex surfactant contains an anionic surfactant and a nonionic surfactant.
7. The preparation process according to claim 6, wherein the mass ratio of the anionic surfactant to the nonionic surfactant is 0.5-2: 1.
8. the process of claim 3, wherein the hydrophilic metal oxide particles are nano-sized titanium dioxide particles.
9. The process according to claim 3, wherein the silicon compound is tetraethoxysilane or silane.
10. The process of claim 3, wherein the adjuvant comprises a water-resistant accelerator and/or a defoamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313508.6A CN113002202A (en) | 2019-12-19 | 2019-12-19 | Preparation process of hydrophilic upper cover plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313508.6A CN113002202A (en) | 2019-12-19 | 2019-12-19 | Preparation process of hydrophilic upper cover plate |
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| CN113002202A true CN113002202A (en) | 2021-06-22 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009113097A2 (en) * | 2008-01-31 | 2009-09-17 | Bilcare Limited | Process for printing a plastic film with water containing inks and water containing additives |
| CN102407653A (en) * | 2011-08-02 | 2012-04-11 | 石深泉 | Environmentally-friendly lithographic printing plate base and preparation process thereof |
| CN102501676A (en) * | 2011-10-14 | 2012-06-20 | 江苏格美高科技发展有限公司 | Matte waterproof polypropylene photo paper applicable for aqueous ink |
| CN107513327A (en) * | 2017-09-13 | 2017-12-26 | 纳印（北京）技术服务有限公司 | Hydrophilic coating compositions and its application and the environment protection type sheet material for direct plate making of ink-jet printing |
| CN108752615A (en) * | 2018-06-11 | 2018-11-06 | 江苏万宝瑞达高新技术有限公司 | A kind of BOPP thermosensitive film production methods suitable for the printing of UV ink |
-
2019
- 2019-12-19 CN CN201911313508.6A patent/CN113002202A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009113097A2 (en) * | 2008-01-31 | 2009-09-17 | Bilcare Limited | Process for printing a plastic film with water containing inks and water containing additives |
| CN102407653A (en) * | 2011-08-02 | 2012-04-11 | 石深泉 | Environmentally-friendly lithographic printing plate base and preparation process thereof |
| CN102501676A (en) * | 2011-10-14 | 2012-06-20 | 江苏格美高科技发展有限公司 | Matte waterproof polypropylene photo paper applicable for aqueous ink |
| CN107513327A (en) * | 2017-09-13 | 2017-12-26 | 纳印（北京）技术服务有限公司 | Hydrophilic coating compositions and its application and the environment protection type sheet material for direct plate making of ink-jet printing |
| CN108752615A (en) * | 2018-06-11 | 2018-11-06 | 江苏万宝瑞达高新技术有限公司 | A kind of BOPP thermosensitive film production methods suitable for the printing of UV ink |
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Application publication date: 20210622 |
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