CN116836582B - Silk screen printing ink and glass cover plate silk screen printing method - Google Patents
Silk screen printing ink and glass cover plate silk screen printing method Download PDFInfo
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- CN116836582B CN116836582B CN202310472333.3A CN202310472333A CN116836582B CN 116836582 B CN116836582 B CN 116836582B CN 202310472333 A CN202310472333 A CN 202310472333A CN 116836582 B CN116836582 B CN 116836582B
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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
- B41M1/12—Stencil printing; Silk-screen printing
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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
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/34—Printing on other surfaces than ordinary paper on glass or ceramic surfaces
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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
- C09D11/023—Emulsion inks
- C09D11/0235—Duplicating inks, e.g. for stencil printing
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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
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- Life Sciences & Earth Sciences (AREA)
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- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention provides silk-screen printing ink for solving the problems of complex operation and insufficient wear resistance of the existing glass cover plate silk-screen printing ink and anti-fingerprint coating, which comprises, by weight, 25-47 parts of a prepolymer, 16-35 parts of a monomer, 0.1-2 parts of a pigment, 3-7 parts of a photoinitiator, 1-5 parts of a compound shown in a structural formula 1 and 2-7 parts of a compound shown in a structural formula 2, wherein the monomer comprises, by weight, 10-15 parts of a first monomer and 6-20 parts of a second monomer, the first monomer is selected from perfluorohexyl epoxypropane, and the prepolymer comprises 10-35 parts of epoxy acrylate and 15-27 parts of aliphatic polyurethane acrylate. The silk-screen printing ink provided by the invention has excellent anti-fouling and anti-oil properties and wear resistance.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to screen printing ink and a glass cover plate screen printing method.
Background
The existing intelligent electronic products are often provided with glass cover plates to protect the internal electronic structures, for example, the outer surfaces of mobile phone cameras are usually provided with glass cover plates, or glass cover plates of some mobile phone shells are usually provided with shielding ink or patterns on non-transparent surfaces or decorative surfaces of the glass cover plates, however, different from the conventional glass surfaces, oil stains and the like are extremely easy to be stained on some shielding ink, such as fingerprints and the like, so as to influence the appearance, the existing scheme for solving the problem is that an anti-fingerprint coating is formed on the surface of the shielding ink in a vapor deposition or vapor deposition mode, however, the scheme has the problems of complex operation flow and high difficulty, and on the other hand, the abrasion resistance of the whole coating can be influenced due to the fact that the shielding ink and the anti-fingerprint coating have surface stress difference, and abrasion and falling risks exist when the whole coating is used for a long time or impacted.
Disclosure of Invention
Aiming at the problems of complex operation and insufficient wear resistance of the existing glass cover plate screen printing ink and anti-fingerprint coating, the invention provides a screen printing ink and a glass cover plate screen printing method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
in one aspect, the invention provides silk-screen printing ink, which comprises the following components in parts by weight:
25-47 parts of prepolymer, 16-35 parts of monomer, 0.1-2 parts of pigment, 3-7 parts of photoinitiator, 1-5 parts of compound shown in structural formula 1 and 2-7 parts of compound shown in structural formula 2;
Structure 1
Structure 2
The monomer comprises the following components in parts by weight:
10-15 parts of a first monomer and 6-20 parts of a second monomer;
The first monomer is selected from perfluorohexyl propylene oxide;
Wherein the prepolymer comprises 10-35 parts of epoxy acrylate and 15-27 parts of aliphatic polyurethane acrylate.
Optionally, the second monomer is selected from one or more of isobornyl (meth) acrylate, tricyclodecane dimethanol diacrylate, neopentyl glycol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, ethylene glycol diglycidyl ether diacrylate.
Optionally, the pigment comprises one or more of chrome green, titanium white, carbon black, lithopone, silver aluminum paste or cobalt oxide, and the median particle size of the pigment is less than 5 microns.
Optionally, the silk-screen printing ink further comprises the following components in parts by weight:
1-3 parts of filler;
The filler is selected from one or more of calcium carbonate, barium sulfate, aluminum hydroxide, silicon dioxide, talcum powder and glycidyl methacrylate grafted modified polyvinylidene fluoride powder.
Optionally, the filler is selected from glycidyl methacrylate graft modified polyvinylidene fluoride powder having a median particle size of less than 5 microns.
Optionally, the photoinitiator comprises one or more of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide, 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin diethyl ether and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide.
Optionally, the silk-screen printing ink further comprises 0.1-3 parts by weight of an auxiliary agent.
Optionally, the auxiliary agent comprises one or more of a leveling agent and a defoaming agent.
In another aspect, the invention provides a glass cover plate screen printing method, comprising the following steps of:
Preparing the silk-screen printing ink, and mixing the prepolymer, the monomer, the pigment, the photoinitiator, the compound shown in the structural formula 1 and the compound shown in the structural formula 2 according to the raw material ratio to obtain the silk-screen printing ink;
Providing a stainless steel wire screen plate, immersing the stainless steel wire screen plate in a perfluorohexyl epoxypropane solution, wherein the perfluorohexyl epoxypropane solution contains 2-4 parts by weight of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide and 96-98 parts by weight of perfluorohexyl epoxypropane;
Taking out the stainless steel wire screen plate, performing ultraviolet light curing on the stainless steel wire screen plate, and forming air pressure difference on two sides of the stainless steel wire screen plate while performing ultraviolet light irradiation curing so as to form air flow in meshes of the stainless steel wire screen plate;
the method comprises the steps of assembling a stainless steel wire screen printing plate after ultraviolet light curing by adopting a fixing frame, placing the stainless steel wire screen printing plate above a glass cover plate, placing silk screen printing ink above the stainless steel wire screen printing plate, and reciprocating the stainless steel wire screen printing plate for 1-4 times by adopting a scraper, wherein the silk screen printing ink forms patterns on the glass cover plate through meshes of the stainless steel wire screen printing plate;
and performing ultraviolet curing operation on the glass cover plate to obtain the glass cover plate with the silk-screen pattern.
Optionally, the operation of forming an air pressure difference on two sides of the stainless steel wire screen plate includes:
Applying positive pressure on one side of a stainless steel wire screen, or:
Negative pressure is applied to one side of the stainless steel wire screen plate.
According to the silk-screen printing ink provided by the invention, epoxy acrylate and aliphatic polyurethane acrylate are adopted as a prepolymer, perfluorohexyl epoxypropane is added into a monomer, and perfluorohexyl epoxypropane can be grafted into the prepolymer through epoxy groups thereof in the ultraviolet light curing process, so that the prepolymer is provided with fluorine-containing branched chains, the anti-fouling and oil-resistant performances of the silk-screen printing ink are improved, an additional fingerprint-resistant layer is not required to be arranged, but the silk-screen printing ink added with perfluorohexyl epoxypropane has another problem that wettability between the surface of a glass cover plate and the silk-screen printing ink is reduced, so that part of positions of the silk-screen printing ink are recessed due to shrinkage stress in the curing process, and the abrasion resistance of the silk-screen printing ink is reduced.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides silk-screen printing ink, which comprises the following components in parts by weight:
25-47 parts of prepolymer, 16-35 parts of monomer, 0.1-2 parts of pigment, 3-7 parts of photoinitiator, 1-5 parts of compound shown in structural formula 1 and 2-7 parts of compound shown in structural formula 2;
Structure 1
Structure 2
The monomer comprises the following components in parts by weight:
10-15 parts of a first monomer and 6-20 parts of a second monomer;
The first monomer is selected from perfluorohexyl propylene oxide;
Wherein the prepolymer comprises 10-35 parts of epoxy acrylate and 15-27 parts of aliphatic polyurethane acrylate.
The silk-screen printing ink adopts epoxy acrylate and aliphatic polyurethane acrylate as a prepolymer, perfluorohexyl epoxypropane is added in a monomer, perfluorohexyl epoxypropane can be grafted into the prepolymer through epoxy groups thereof in the ultraviolet light curing process, so that the prepolymer is provided with fluorine-containing branched chains, the anti-fouling and anti-oil performance of the silk-screen printing ink is improved, no additional fingerprint layer is required to be arranged, but the silk-screen printing ink added with perfluorohexyl epoxypropane has another problem that wettability between the surface of a glass cover plate and the silk-screen printing ink is reduced, partial position depression is caused by shrinkage stress of the silk-screen printing ink in the curing process, flatness after curing is insufficient, and abrasion resistance is reduced.
In some embodiments, the second monomer is selected from one or more of isobornyl (meth) acrylate, tricyclodecane dimethanol diacrylate, neopentyl glycol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, ethylene glycol diglycidyl ether diacrylate.
The second monomer has smaller molecular weight and low viscosity, is used as a solubilizer in the silk-screen printing ink, participates in reaction film formation in the ultraviolet light curing process, does not generate solvent volatilization in the process, and has better environmental protection effect, and in a preferred embodiment, the second monomer contains 30 mass percent of polyfunctional group reaction monomers, wherein the polyfunctional group reaction monomers comprise one or more of propylene glycol diacrylate and ethylene glycol diglycidyl ether diacrylate, calculated by the total mass of the second monomer as 100 percent.
In some embodiments, the pigment comprises one or more of chrome green, titanium dioxide, carbon black, lithopone, silver aluminum paste, or cobalt oxide, and the pigment has a median particle size of less than 5 microns.
The choice of pigment may be selected according to the actual color to be rendered, for example, carbon black may be selected if the silk-screen ink is ultimately rendered black, titanium dioxide may be selected if the silk-screen ink is ultimately rendered white, and so on, in some cases, multiple pigments may be used together to achieve a particular color match.
The pigment with the median particle diameter smaller than 5 microns is beneficial to ensuring the dispersibility of the pigment and the application of the obtained ink in screen printing, and when the median particle diameter of the pigment is too large, sedimentation is easy to occur or the pigment is not easy to pass through meshes in the screen printing process, so that the film forming effect is influenced.
In some embodiments, the silk screen ink further comprises the following weight components:
1-3 parts of filler;
The filler is selected from one or more of calcium carbonate, barium sulfate, aluminum hydroxide, silicon dioxide, talcum powder and glycidyl methacrylate grafted modified polyvinylidene fluoride powder.
The filler is used for enhancing the wear resistance of the silk-screen printing ink.
In some embodiments, the filler is selected from glycidyl methacrylate graft modified polyvinylidene fluoride powders having a median particle size of less than 5 microns.
The application preferably adopts the polyvinylidene fluoride powder grafted and modified by the glycidyl methacrylate as a reinforcing filler, the polyvinylidene fluoride powder has higher wear resistance and toughness, the wear resistance of the silk screen printing ink is improved by the addition of the polyvinylidene fluoride powder, the polyvinylidene fluoride powder has better toughness, the problem of increased internal stress caused by ring-opening connection of epoxy groups in the curing process of the silk screen printing ink is effectively solved, the internal stress of the film layer is further reduced, the stability and wear resistance of the cured film layer are improved, the problem that the pure polyvinylidene fluoride powder is difficult to fully disperse with other components is solved, the whole strength of the film layer is influenced, the realization of the buffer function is influenced by the influence on the interface of the pure polyvinylidene fluoride powder and other materials, the problem that the uniform dispersion of the pure polyvinylidene fluoride powder on the polyvinylidene fluoride powder is more favorable for improving the wear resistance of the epoxy groups in the film layer after the curing process is solved, and the problem that the compatibility of the epoxy groups in the film layer is better is improved is solved, and the film layer is better than the problem that the epoxy groups are fully dispersed and the film layer is better in the curing process is more favorable for the improvement of the compatibility of the epoxy groups in the film layer is further solved.
In some embodiments, the filler has a grafted glycidyl methacrylate content of 4% to 15% by mass, based on 100% by mass of the filler.
In some embodiments, the photoinitiator includes one or more of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide, 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin diethyl ether, and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide.
In some embodiments, the silk screen printing ink further comprises 0.1-3 parts by weight of an auxiliary agent.
In some embodiments, the adjuvant includes one or more of a leveling agent, an antifoaming agent.
The leveling agent is used for improving the leveling property of the silk-screen printing ink and the flatness of the film layer, and the defoaming agent is used for reducing bubbles generated in the silk-screen printing ink and avoiding the problem that the cured film layer has small bubbles.
Another embodiment of the present invention provides a glass cover plate screen printing method, comprising the following operation steps:
Preparing the silk-screen printing ink, and mixing the prepolymer, the monomer, the pigment, the photoinitiator, the compound shown in the structural formula 1 and the compound shown in the structural formula 2 according to the raw material ratio to obtain the silk-screen printing ink;
Providing a stainless steel wire screen plate, immersing the stainless steel wire screen plate in a perfluorohexyl epoxypropane solution, wherein the perfluorohexyl epoxypropane solution contains 2-4 parts by weight of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide and 96-98 parts by weight of perfluorohexyl epoxypropane;
Taking out the stainless steel wire screen plate, performing ultraviolet light curing on the stainless steel wire screen plate, and forming air pressure difference on two sides of the stainless steel wire screen plate while performing ultraviolet light irradiation curing so as to form air flow in meshes of the stainless steel wire screen plate;
the method comprises the steps of assembling a stainless steel wire screen printing plate after ultraviolet light curing by adopting a fixing frame, placing the stainless steel wire screen printing plate above a glass cover plate, placing silk screen printing ink above the stainless steel wire screen printing plate, and reciprocating the stainless steel wire screen printing plate for 1-4 times by adopting a scraper, wherein the silk screen printing ink forms patterns on the glass cover plate through meshes of the stainless steel wire screen printing plate;
and performing ultraviolet curing operation on the glass cover plate to obtain the glass cover plate with the silk-screen pattern.
It should be noted that, the inventor finds that when the components of the silk-screen printing ink are adjusted, the problem of pattern edge burrs occurs when the original stainless steel wire screen plate is adopted for silk-screen printing, the reason is that the fluorine modified silk-screen printing ink is insufficient in wettability to the stainless steel wire screen plate, so that the surface tension at the mesh is overlarge, the transmission of the silk-screen printing ink is uneven, especially in the edge position, is more obvious, in order to solve the problem, the inventor places the stainless steel wire screen plate in perfluorohexyl epoxy propane solution, adheres a thin fluorine-containing resin layer on stainless steel wires of the stainless steel wire screen plate in a photo-curing and pressure-applying mode, and meanwhile, because continuous airflow exists between meshes on the stainless steel wire screen plate, the problem that the meshes are blocked in the curing process can be avoided, the wettability between the silk-screen printing ink and the stainless steel wire screen printing ink can be improved, and the tension of the silk-screen printing ink at the stainless steel wire screen plate is reduced, so that the problem of edge burrs occurring at the stainless steel wire screen printing pattern can be effectively solved.
In some embodiments, the operation of creating a differential air pressure across the stainless steel wire screen plate comprises:
Applying positive pressure on one side of a stainless steel wire screen, or:
Negative pressure is applied to one side of the stainless steel wire screen plate.
In some embodiments, in the "ultraviolet curing operation on a glass cover plate", the glass cover plate is placed in an air atmosphere, the glass cover plate is heated to make the temperature of the glass cover plate reach 50 ℃ to 60 ℃, the temperature is kept for 30min to 2h, and ultraviolet light is applied to the glass cover plate to perform the curing operation.
The method is characterized in that the method is cured in an air atmosphere, and meanwhile, the temperature is kept at 50-60 ℃, water contained in the air can be utilized to promote the hydrolysis of siloxane groups on the compound shown in the structural formula 1 and the compound shown in the structural formula 2 so that the compounds are combined with the surface of the glass cover plate, and the smoothness of the surface of the cured ink in the subsequent ultraviolet curing operation is ensured.
The invention is further illustrated by the following examples.
Example 1
The embodiment is used for explaining the glass cover plate silk screen printing method disclosed by the invention, and comprises the following operation steps:
mixing the raw materials according to the following weight proportion to obtain silk-screen printing ink;
23 parts of epoxy acrylate, 21 parts of aliphatic polyurethane acrylate, 13 parts of perfluorohexyl propylene oxide, 10 parts of isobornyl (meth) acrylate, 5 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of glycidyl methacrylate grafted and modified polyvinylidene fluoride powder, 2 parts of a compound shown in a structural formula 1, 4 parts of a compound shown in the structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
The median particle diameter of the glycidyl methacrylate graft modified polyvinylidene fluoride powder was 4.3 microns.
Providing a stainless steel wire screen plate, wherein a planar pattern and a CD pattern (mesh pattern) are arranged on the stainless steel wire screen plate, and the stainless steel wire screen plate is immersed in a perfluorohexyl epoxypropane solution, wherein the perfluorohexyl epoxypropane solution contains 3 parts by weight of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide and 97 parts by weight of perfluorohexyl epoxypropane;
Taking out the stainless steel wire screen plate, performing ultraviolet light curing on the stainless steel wire screen plate, and continuously sucking at one side of the stainless steel by adopting a centrifugal fan while performing ultraviolet light irradiation curing so as to form air flow in meshes of the stainless steel wire screen plate;
The method comprises the steps of assembling a stainless steel wire screen plate after ultraviolet light curing by adopting a fixed frame, placing the stainless steel wire screen plate above a glass cover plate, placing silk-screen printing ink above the stainless steel wire screen plate, and performing reciprocating motion on the stainless steel wire screen plate for 2 times by adopting a scraper, wherein the silk-screen printing ink forms patterns on the glass cover plate through meshes of the stainless steel wire screen plate;
After the silk screen printing operation, placing the glass cover plate in an air atmosphere, heating the glass cover plate to enable the temperature of the glass cover plate to reach 55 ℃, preserving heat for 1h, and then performing ultraviolet curing operation on the glass cover plate to obtain the glass cover plate with the silk screen printing pattern.
Example 2
The present embodiment is used for explaining the glass cover plate screen printing method disclosed by the invention, and comprises most of the operation steps in embodiment 1, wherein the difference is that:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
31 parts of epoxy acrylate, 15 parts of aliphatic polyurethane acrylate, 15 parts of perfluorohexyl propylene oxide, 5 parts of isobornyl (meth) acrylate, 11 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of glycidyl methacrylate grafted and modified polyvinylidene fluoride powder, 4 parts of a compound shown in a structural formula 1, 2 parts of a compound shown in a structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
Example 3
The present embodiment is used for explaining the glass cover plate screen printing method disclosed by the invention, and comprises most of the operation steps in embodiment 1, wherein the difference is that:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
16 parts of epoxy acrylate, 24 parts of aliphatic polyurethane acrylate, 11 parts of perfluorohexyl propylene oxide, 10 parts of isobornyl (meth) acrylate, 6 parts of tripropylene glycol diacrylate, 0.5 part of carbon black, 2 parts of glycidyl methacrylate grafted and modified polyvinylidene fluoride powder, 4 parts of a compound shown in a structural formula 1, 2 parts of a compound shown in a structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
Example 4
The present embodiment is used for explaining the glass cover plate screen printing method disclosed by the invention, and comprises most of the operation steps in embodiment 1, wherein the difference is that:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
23 parts of epoxy acrylate, 21 parts of aliphatic polyurethane acrylate, 13 parts of perfluorohexyl propylene oxide, 10 parts of isobornyl (meth) acrylate, 5 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of polyvinylidene fluoride powder, 2 parts of a compound shown in a structural formula 1, 4 parts of a compound shown in a structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
The median particle diameter of the polyvinylidene fluoride powder was 3.8 microns.
Example 5
The present embodiment is used for explaining the glass cover plate screen printing method disclosed by the invention, and comprises most of the operation steps in embodiment 1, wherein the difference is that:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
23 parts of epoxy acrylate, 21 parts of aliphatic polyurethane acrylate, 13 parts of perfluorohexyl propylene oxide, 10 parts of isobornyl (meth) acrylate, 5 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of silicon dioxide, 2 parts of a compound shown in a structural formula 1, 4 parts of a compound shown in a structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
The median particle size of the silica was 2.1 microns.
Example 6
The present embodiment is used for explaining the glass cover plate screen printing method disclosed by the invention, and comprises most of the operation steps in embodiment 1, wherein the difference is that:
After the silk-screen printing operation, the temperature rising operation is not performed, and the ultraviolet curing operation is directly performed on the glass cover plate, so that the glass cover plate with the silk-screen printing pattern is obtained.
Comparative example 1
This comparative example is used to compare and illustrate the disclosed glass cover plate screen printing method, comprising most of the operating steps of example 1, with the following differences:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
23 parts of epoxy acrylate, 21 parts of aliphatic polyurethane acrylate, 23 parts of isobornyl (meth) acrylate, 5 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of glycidyl methacrylate grafted and modified polyvinylidene fluoride powder, 2 parts of a compound shown in a structural formula 1, 4 parts of a compound shown in the structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
Comparative example 2
This comparative example is used to compare and illustrate the disclosed glass cover plate screen printing method, comprising most of the operating steps of example 1, with the following differences:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
23 parts of epoxy acrylate, 21 parts of aliphatic polyurethane acrylate, 13 parts of perfluorohexyl propylene oxide, 10 parts of isobornyl (meth) acrylate, 5 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of glycidyl methacrylate grafted and modified polyvinylidene fluoride powder, 2 parts of a compound shown in a structural formula 1 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
Comparative example 3
This comparative example is used to compare and illustrate the disclosed glass cover plate screen printing method, comprising most of the operating steps of example 1, with the following differences:
the silk-screen printing ink is prepared by mixing the following raw materials in parts by weight:
23 parts of epoxy acrylate, 21 parts of aliphatic polyurethane acrylate, 13 parts of perfluorohexyl propylene oxide, 10 parts of isobornyl (meth) acrylate, 5 parts of propylene glycol diacrylate, 0.5 part of carbon black, 2 parts of glycidyl methacrylate grafted and modified polyvinylidene fluoride powder, 4 parts of a compound shown in a structural formula 2 and 4 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone.
Comparative example 4
This comparative example is used to compare and illustrate the disclosed glass cover plate screen printing method, comprising most of the operating steps of example 1, with the following differences:
the stainless steel wire screen plate is not subjected to additional soaking and curing operations, and is directly adopted to carry out pattern silk screen printing of silk screen printing ink.
Comparative example 5
This comparative example is used to compare and illustrate the disclosed glass cover plate screen printing method, comprising most of the operating steps of example 1, with the following differences:
And taking out the stainless steel wire screen printing plate, and directly carrying out ultraviolet curing on the stainless steel wire screen printing plate without carrying out the suction operation of the centrifugal fan.
Performance testing
The following performance tests were performed on the glass cover plates prepared in examples 1 to 6 and comparative examples 1 to 5:
1. contact angle test the contact angle of hexadecane on the bulk pattern of each example and comparative example sample was measured using a contact angle meter.
2. And friction test, namely fixing the prepared glass cover plate through a clamp, clamping steel wool on the surfaces of samples of each example and comparative example by using a manipulator, setting the same acting force by using the manipulator, pushing the steel wool back and forth to perform surface friction, and testing the contact angle of hexadecane on the samples of each example and comparative example through a contact angle measuring instrument after the steel wool is rubbed back and forth for 500 times.
3. And (3) testing the pattern forming effect, namely evaluating the CD pattern by visual inspection and recording the CD pattern forming effect.
The test results obtained are filled in Table 1.
TABLE 1
As can be seen from the test results of Table 1, compared with other screen printing inks, the glass cover plate formed by the screen printing method of the glass cover plate provided by the invention has a larger contact angle, which indicates that the screen printing ink provided by the invention has better oleophobic performance, and still maintains the better oleophobic performance after repeated friction, and has excellent abrasion resistance.
From the test results of examples 1 to 3 and examples 4 and 5, it is known that the glycidyl methacrylate grafted and modified polyvinylidene fluoride powder as a reinforcing filler can effectively improve the abrasion resistance of the ink and avoid the problem of reduced oleophobicity caused by abrasion.
From the test results of examples 1 to 6 and comparative example 4, it is known that the tension of the screen printing ink at the mesh of the stainless steel screen printing plate can be effectively reduced by performing the soaking and curing operation on the stainless steel screen printing plate, and the problem of edge burrs of the screen printing pattern can be effectively solved. From the test results of comparative example 5, it is understood that the blocking of the mesh can be avoided by the suction operation during the curing of the stainless wire screen plate, and the screen printing effect can be ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. The glass cover plate screen printing method is characterized by comprising the following operation steps:
Preparing a silk-screen printing ink, wherein the silk-screen printing ink comprises the following components in parts by weight:
25-47 parts of prepolymer, 16-35 parts of monomer, 0.1-2 parts of pigment, 3-7 parts of photoinitiator, 1-5 parts of compound shown in structural formula 1 and 2-7 parts of compound shown in structural formula 2;
Structure 1
Structure 2
The monomer comprises the following components in parts by weight:
10-15 parts of a first monomer and 6-20 parts of a second monomer;
The first monomer is selected from perfluorohexyl propylene oxide;
Wherein the prepolymer comprises 10-35 parts of epoxy acrylate and 15-27 parts of aliphatic polyurethane acrylate;
Mixing a prepolymer, a monomer, a pigment, a photoinitiator, a compound shown in a structural formula 1 and a compound shown in a structural formula 2 according to a raw material ratio to obtain silk-screen printing ink;
Providing a stainless steel wire screen plate, immersing the stainless steel wire screen plate in a perfluorohexyl epoxypropane solution, wherein the perfluorohexyl epoxypropane solution contains 2-4 parts by weight of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide and 96-98 parts by weight of perfluorohexyl epoxypropane;
Taking out the stainless steel wire screen plate, performing ultraviolet light curing on the stainless steel wire screen plate, and forming air pressure difference on two sides of the stainless steel wire screen plate while performing ultraviolet light irradiation curing so as to form air flow in meshes of the stainless steel wire screen plate;
the method comprises the steps of assembling a stainless steel wire screen printing plate after ultraviolet light curing by adopting a fixing frame, placing the stainless steel wire screen printing plate above a glass cover plate, placing silk screen printing ink above the stainless steel wire screen printing plate, and reciprocating the stainless steel wire screen printing plate for 1-4 times by adopting a scraper, wherein the silk screen printing ink forms patterns on the glass cover plate through meshes of the stainless steel wire screen printing plate;
and performing ultraviolet curing operation on the glass cover plate to obtain the glass cover plate with the silk-screen pattern.
2. The glass cover plate screen printing method according to claim 1, wherein the second monomer is selected from one or more of isobornyl (meth) acrylate, tricyclodecane dimethanol diacrylate, neopentyl glycol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, ethylene glycol diglycidyl ether diacrylate.
3. The glass cover plate screen printing method according to claim 1, wherein the pigment comprises one or more of chrome green, titanium white, carbon black, titanium barium white, silver aluminum paste or cobalt oxide, and the median particle size of the pigment is less than 5 microns.
4. The glass cover plate screen printing method according to claim 1, wherein the screen printing ink further comprises the following components in parts by weight:
1-3 parts of filler;
The filler is selected from one or more of calcium carbonate, barium sulfate, aluminum hydroxide, silicon dioxide, talcum powder and glycidyl methacrylate grafted modified polyvinylidene fluoride powder.
5. The glass cover screen printing method according to claim 4, wherein the filler is selected from glycidyl methacrylate graft modified polyvinylidene fluoride powder with a median particle diameter of less than 5 microns.
6. The glass cover plate screen printing method according to claim 1, wherein the photoinitiator comprises one or more of diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, benzoin diethyl ether and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide.
7. The glass cover plate screen printing method according to claim 1, wherein the screen printing ink further comprises 0.1-3 parts by weight of an auxiliary agent.
8. The glass cover plate screen printing method according to claim 7, wherein the auxiliary agent comprises one or more of a leveling agent and a defoaming agent.
9. The glass cover screen printing method according to claim 1, wherein the operation of forming a differential air pressure on both sides of the stainless steel wire screen plate comprises:
Applying positive pressure on one side of a stainless steel wire screen, or:
Negative pressure is applied to one side of the stainless steel wire screen plate.
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| CN102010484A (en) * | 2009-09-08 | 2011-04-13 | 中国科学院上海应用物理研究所 | Method for preparing polyvinylidene fluoride grafted methacrylic acid glycidyl ester |
| CN106189498A (en) * | 2016-08-29 | 2016-12-07 | 苏州安洁科技股份有限公司 | A kind of ink for screen printing |
| CN108102527A (en) * | 2017-12-14 | 2018-06-01 | 湖南阳光新材料有限公司 | A kind of anti-fingerprint mobile phone protects UV coating |
| CN114539915A (en) * | 2022-02-07 | 2022-05-27 | 厦门三德信科技股份有限公司 | Low-shrinkage high-hardness flexible fingerprint hardening prevention coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1337578A (en) * | 1969-12-17 | 1973-11-14 | Du Pont | Method of decreasing the wettability of surfaces |
| EP2215171B1 (en) * | 2007-11-29 | 2013-07-03 | LG Chem, Ltd. | Coating composition and coating film having enhanced abrasion resistance and fingerprint traces removability |
| KR101422727B1 (en) * | 2012-06-29 | 2014-07-24 | 한국화학연구원 | UV curable fluorinated copolymer, a composition containing the same and their films containing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102010484A (en) * | 2009-09-08 | 2011-04-13 | 中国科学院上海应用物理研究所 | Method for preparing polyvinylidene fluoride grafted methacrylic acid glycidyl ester |
| CN106189498A (en) * | 2016-08-29 | 2016-12-07 | 苏州安洁科技股份有限公司 | A kind of ink for screen printing |
| CN108102527A (en) * | 2017-12-14 | 2018-06-01 | 湖南阳光新材料有限公司 | A kind of anti-fingerprint mobile phone protects UV coating |
| CN114539915A (en) * | 2022-02-07 | 2022-05-27 | 厦门三德信科技股份有限公司 | Low-shrinkage high-hardness flexible fingerprint hardening prevention coating and preparation method thereof |
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