CN116675441A - Front method for protecting rear cover glass of mobile phone from acid etching - Google Patents
Front method for protecting rear cover glass of mobile phone from acid etching Download PDFInfo
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- CN116675441A CN116675441A CN202310604938.3A CN202310604938A CN116675441A CN 116675441 A CN116675441 A CN 116675441A CN 202310604938 A CN202310604938 A CN 202310604938A CN 116675441 A CN116675441 A CN 116675441A
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- water
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- protective ink
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- 239000002253 acid Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000005530 etching Methods 0.000 title claims abstract description 27
- 239000006059 cover glass Substances 0.000 title claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 109
- 239000011521 glass Substances 0.000 claims abstract description 87
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 29
- 239000013530 defoamer Substances 0.000 claims abstract description 25
- 239000000080 wetting agent Substances 0.000 claims abstract description 24
- 239000008213 purified water Substances 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 18
- -1 acrylic ester Chemical class 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 9
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- 238000007639 printing Methods 0.000 claims description 9
- 238000010992 reflux Methods 0.000 claims description 9
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 8
- 229920000570 polyether Polymers 0.000 claims description 8
- 239000002761 deinking Substances 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 239000006072 paste Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000003828 vacuum filtration Methods 0.000 claims description 3
- 150000003377 silicon compounds Chemical class 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000976 ink Substances 0.000 description 106
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000002313 adhesive film Substances 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000003961 organosilicon compounds Chemical class 0.000 description 2
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 1
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- JLFNLZLINWHATN-UHFFFAOYSA-N pentaethylene glycol Chemical compound OCCOCCOCCOCCOCCO JLFNLZLINWHATN-UHFFFAOYSA-N 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- 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
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
- C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/112—Deposition methods from solutions or suspensions by spraying
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/355—Temporary coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention provides a front method for protecting the acid etching of the glass of a rear cover of a mobile phone, which is characterized in that a layer of water-soluble protective ink is sprayed on the convex surface of the 3D glass of the rear cover glass of the mobile phone, so that the defect caused by splashing of the acid-resistant protective ink on the convex surface of the 3D glass when the acid-resistant protective ink is sprayed is reduced, the whole method is simple and easy to implement, and the glass defect rate caused by splashing of the acid-resistant protective ink can be greatly reduced. The water-soluble protective ink comprises the following components in parts by mass of 100 parts: 80 to 90 parts of water-soluble acrylate oligomer, 0.1 to 0.5 part of wetting agent, 1 to 2 parts of defoamer, 0.6 to 1 part of color paste, 1 to 3 parts of sodium hydroxide and the balance of purified water. The water-soluble protective ink has good adhesion to glass and is easy to remove, and hot water is used for removing, so that the complexity of the method is greatly reduced, and the production efficiency and the implementation feasibility are improved.
Description
Technical Field
The invention relates to the technical field of processing of mobile phone rear covers, in particular to a front method for protecting mobile phone rear covers from acid etching.
Background
Common materials for the mobile phone back cover include plastics, metals, glass, ceramics and the like, and in recent years, 3D glass combined with AG frosting method is favored as the mobile phone back cover material. The AG frosting method processes glass by chemical acid etching, and temporarily protects the other surface (typically the concave surface of the 3D glass back cover) of the etched glass surface (typically the convex surface of the 3D glass back cover) during etching. The acid-resistant protective ink has extremely strong acid etching resistance, and can effectively protect the covered part during AG frosting. However, when the acid-resistant protective ink is sprayed, ink dots are often sputtered onto the convex surface of the rear cover of the 3D glass, so that the positions of the sputtered ink dots become poor points in the subsequent AG frosting process, and the AG frosting effect is affected.
CN106824705a discloses an ink spraying method for a 3D glass cover plate, wherein the 3D glass cover plate comprises a plane part and a cambered surface part, and the main steps are as follows: silk screen printing a strippable adhesive film on the outer side surface of the cambered surface part; drying the strippable adhesive film; sticking a plane protection film on the outer side surface of the plane part of the 3D glass cover plate; pasting a VA area protective film on the visible area of the inner side surface of the 3D glass cover plate to form a pretreated glass cover plate; placing a pretreated glass cover plate on a workbench; spraying ink to a spraying area of the pretreated glass cover plate by using a nozzle to form a pre-dried glass cover plate; heating the pre-dried glass cover plate to dry the ink layer; and tearing off the plane protection film, the VA area protection film and the strippable glue film on the 3D glass cover plate. The strippable adhesive film and the plane protective film protect the outer side surface of the 3D glass cover plate in the process of spraying ink, and the strippable adhesive film and the plane protective film are torn off after the ink is dried, so that the flying ink can be eliminated. The method effectively reduces the defective proportion of the 3D glass cover plate caused by the flying ink, but the operation steps are very complicated. Although film lamination is an effective option, film lamination tends to consume significant labor, and film lamination is cost-effective given that this step is directed to protecting the front-end of the ink. In view of the suitability for large-scale construction, it is appropriate to use a spraying operation to achieve temporary protection of the convex surface of the 3D glass back cover. However, once spraying is involved, flying ink is unavoidable, and at the same time, there are several problems to be overcome: firstly, temporary protection of the convex surface of the 3D glass back cover cannot influence subsequent frosting of the convex surface AG of the glass back cover and acid-resistant protection ink of the concave surface of the glass back cover, namely ink splashing points generated when the temporary protection of the convex surface of the 3D glass back cover is formed by spraying are also under the protection of the acid-resistant ink, and extra defects cannot be caused; secondly, the scheme cannot be excessively complicated, the feasibility needs to be improved, the subsequent glass rear cover convex AG frosting and the glass rear cover concave acid-resistant protective ink cannot be affected, that is to say, the temporary protective coating of the 3D glass rear cover convex needs to be easily removed.
In this regard, a front method for protecting the glass of the rear cover of the mobile phone from acid etching needs to be provided, so that the acid etching efficiency and the yield of the glass of the rear cover of the mobile phone after acid etching are improved.
Disclosure of Invention
The invention aims to provide a pre-method for protecting the glass etching of a mobile phone rear cover, which is simple to operate, and realizes temporary protection of the convex surface of the 3D glass rear cover by using a temporary coating, and the temporary coating is easy to remove, so that the operation efficiency is improved.
In order to achieve the above purpose, the invention provides a front method for protecting the acid etching of a back cover glass of a mobile phone, wherein the back cover glass comprises a 3D glass concave surface and a 3D glass convex surface opposite to the 3D glass concave surface, and the method comprises the following steps:
step one, preparing water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, removing the water-soluble protective ink on the convex surface of the 3D glass after the acid-resistant protective ink on the concave surface of the 3D glass is solidified.
Wherein, the water-soluble protective ink comprises the following components in parts by mass of 100 parts: 80 to 90 parts of water-soluble acrylate oligomer, 0.1 to 0.5 part of wetting agent, 1 to 2 parts of defoamer, 0.6 to 1 part of color paste, 1 to 3 parts of sodium hydroxide and the balance of purified water.
Preferably, the water-soluble acrylate oligomer comprises the following components in percentage by mass: 5-10 parts of acrylic acid, 10-20 parts of methacrylic acid, 25-45 parts of butyl acrylate, 0.6-1 part of azodiisobutyronitrile, 30-50 parts of ethanol and a proper amount of ammonia water are used for adjusting the pH value of the water-soluble acrylate oligomer to obtain the pH value.
Further preferably, the preparation method of the water-soluble acrylate oligomer comprises the following steps: adding ethanol into a reaction kettle with a condensation reflux device, a constant pressure dropwise adding device and a temperature display and stirring device, heating the ethanol to the reflux temperature of 85+/-5 ℃, dropwise adding a uniform mixture of acrylic acid, methacrylic acid, butyl acrylate and azodiisobutyronitrile into the reaction kettle in the form of broken beads after the reflux is stable, stabilizing the temperature to 90 ℃, carrying out heat preservation reaction for 4 hours to obtain an acrylic ester mixed solution, cooling the acrylic ester mixed solution to 60 ℃, adding ammonia water to neutralize the acrylic ester mixed solution to the pH value of 8.0-9.0, and finally carrying out vacuum filtration to remove most of the ethanol to obtain the water-soluble acrylic ester oligomer.
Preferably, the wetting agent is one of polyethylene glycol or polyether organosilicon compounds.
Preferably, the defoamer is BYK-054.
Preferably, the color paste is aqueous blue.
Preferably, the preparation steps of the water-soluble protective ink are as follows: adding while stirring, adding corresponding water-soluble acrylate oligomer, film forming agent, wetting agent, defoamer, color paste, sodium hydroxide and purified water into a container, and stirring until the water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water are completely dispersed uniformly to obtain the water-soluble protective ink.
Preferably, the water-soluble protective ink removing method is to keep the rear cover glass in hot water at 90 ℃ for 3-10min to finish deinking.
The invention has the beneficial effects that: the invention provides a front method for protecting the acid etching of the glass of a rear cover of a mobile phone, which is characterized in that a layer of water-soluble protective ink is sprayed on the convex surface of the 3D glass of the rear cover glass of the mobile phone, so that the defect caused by splashing of the acid-resistant protective ink on the convex surface of the 3D glass when the acid-resistant protective ink is sprayed is reduced, the whole method is simple and easy to implement, and the glass defect rate caused by splashing of the acid-resistant protective ink can be greatly reduced. Meanwhile, the water-soluble protective ink adopted by the invention has good adhesion to glass, and the water-soluble protective ink is sprayed before the acid-resistant protective ink is sprayed, so that a new bad point is not generated at the concave surface of the 3D glass.
Detailed Description
The embodiments described below are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a prepositive method for protecting the acid etching of the glass of a back cover of a mobile phone, wherein the back cover glass comprises a 3D glass concave surface and a 3D glass convex surface opposite to the concave surface, and the method comprises the following steps:
step one, preparing water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, removing the water-soluble protective ink on the convex surface of the 3D glass after the acid-resistant protective ink on the concave surface of the 3D glass is solidified.
Wherein, the water-soluble protective ink comprises the following components in parts by mass of 100 parts: 80 to 90 parts of water-soluble acrylate oligomer, 0.1 to 0.5 part of wetting agent, 1 to 2 parts of defoamer, 0.6 to 1 part of color paste, 1 to 3 parts of sodium hydroxide and the balance of purified water.
The water-soluble acrylate oligomer comprises the following components in percentage by mass: 5-10 parts of acrylic acid, 10-20 parts of methacrylic acid, 25-45 parts of butyl acrylate, 0.6-1 part of azodiisobutyronitrile, 30-50 parts of ethanol and a proper amount of ammonia water are used for adjusting the pH value of the water-soluble acrylate oligomer. Acrylic acid and methacrylic acid have excellent compatibility with water, the polarity of the former is stronger, the overall water solubility of the oligomer can be ensured, the reactivity of butyl acrylate is strong, the glass transition temperature is lower, the butyl acrylate belongs to a soft monomer, the acrylic acid and the methacrylic acid can be balanced in terms of softness, and the adhesion of the butyl acrylate and the methacrylic acid is closely related to the adhesion of the finally obtained oligomer. The azobisisobutyronitrile is selected mainly because it causes a relatively stable reaction in a certain temperature range.
The preparation method of the water-soluble acrylate oligomer comprises the following steps: adding ethanol into a reaction kettle with a condensation reflux device, a constant pressure dropwise adding device and a temperature display and stirring device, heating the ethanol to the reflux temperature of 85+/-5 ℃, dropwise adding a uniform mixture of acrylic acid, methacrylic acid, butyl acrylate and azodiisobutyronitrile into the reaction kettle in the form of broken beads after the reflux is stable, stabilizing the temperature to 90 ℃, carrying out heat preservation reaction for 4 hours to obtain an acrylic ester mixed solution, cooling the acrylic ester mixed solution to 60 ℃, adding ammonia water to neutralize the acrylic ester mixed solution to the pH value of 8.0-9.0, and finally carrying out vacuum filtration to remove most of the ethanol to obtain the water-soluble acrylic ester oligomer. The wetting agent is one of nonionic fluorocarbon polymer compounds or polyether organic silicon compounds. The addition of a proper amount of wetting agent aims at improving the wetting spreadability of the ink on a substrate, preventing bad occurrence of shrinkage cavity, edge shrinkage and the like, and the excessive use amount can have bad influence on recoating. The nonionic fluorocarbon polymer compound mainly comprises four types of polyethylene glycol type, sulfoxide type, polyol type and polyether type, and mainly can be selected from polyethylene glycol type, specifically PEG200 or PEG400. The polyether organosilicon compound is prepared by using polyether modified organosilicon surfactant and connecting organosilicon chain segment and polyether chain segment through chemical bond. By adjusting the polymerization degree of polyether and organosilicon, organosilicon surfactants with different properties and different purposes can be obtained, and the organosilicon surfactant can be applied to the industries of paint industry, polyurethane, pesticide, daily chemical industry and the like. BYK-349 is preferred.
The defoamer is BYK-054. The main function of the defoamer is to inhibit and eliminate foam generated in the production and construction process of the printing ink. The defoaming effect is poor when the amount of the defoaming agent is too small, and the problem of shrinkage cavity, poor recoatability and the like can be caused when the amount of the defoaming agent is too large.
The color paste is water-based blue, can play a role in color indication, and is convenient for observing the adhesion condition and the removal condition of the water-soluble protective ink on the convex surface of the 3D glass.
The preparation method of the water-soluble protective ink comprises the following steps: adding while stirring, adding corresponding water-soluble acrylate oligomer, film forming agent, wetting agent, defoamer, color paste, sodium hydroxide and purified water into a container, and stirring until the water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water are completely dispersed uniformly to obtain the water-soluble protective ink.
The water-soluble protective ink removing method is that the rear cover glass is kept stand in hot water at 90 ℃ for 3-10min, and deinking can be completed.
Example 1
The embodiment provides water-soluble protective ink which comprises the following components in parts by mass of 100 parts: 90 parts of water-soluble acrylate oligomer, 0.2 part of wetting agent, 1 part of defoamer, 0.8 part of color paste, 1 part of sodium hydroxide and 7 parts of purified water.
The preparation method of the water-soluble protective ink comprises the following steps: and sequentially adding the corresponding water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water into a container, stirring and adding the mixture, and stirring the mixture until the mixture is completely and uniformly dispersed to obtain the water-soluble protective ink.
The water-based protective ink is used for a front method for protecting the glass of a rear cover of a mobile phone from acid etching, and the method comprises the following steps:
step one, preparing the water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, after the acid-resistant protective ink on the concave surface of the 3D glass is solidified, removing the water-soluble protective ink on the convex surface of the 3D glass by hot water.
Example 2
The embodiment improves the water-soluble protective ink, which comprises the following components in parts by mass of 100 parts: 90 parts of water-soluble acrylate oligomer, 0.2 part of wetting agent, 1 part of defoamer, 0.8 part of color paste, 3 parts of sodium hydroxide and 5 parts of purified water.
The preparation method of the water-soluble protective ink comprises the following steps: and sequentially adding the corresponding water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water into a container, stirring and adding the mixture, and stirring the mixture until the mixture is completely and uniformly dispersed to obtain the water-soluble protective ink.
The water-based protective ink is used for a front method for protecting the glass of a rear cover of a mobile phone from acid etching, and the method comprises the following steps:
step one, preparing the water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, after the acid-resistant protective ink on the concave surface of the 3D glass is solidified, removing the water-soluble protective ink on the convex surface of the 3D glass by hot water.
Example 3
The embodiment improves the water-soluble protective ink, which comprises the following components in parts by mass of 100 parts: 90 parts of water-soluble acrylate oligomer, 0.2 part of wetting agent, 2 parts of defoamer, 0.8 part of color paste, 3 parts of sodium hydroxide and 4 parts of purified water.
The preparation method of the water-soluble protective ink comprises the following steps: and sequentially adding the corresponding water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water into a container, stirring and adding the mixture, and stirring the mixture until the mixture is completely and uniformly dispersed to obtain the water-soluble protective ink.
The water-based protective ink is used for a front method for protecting the glass of a rear cover of a mobile phone from acid etching, and the method comprises the following steps:
step one, preparing the water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, after the acid-resistant protective ink on the concave surface of the 3D glass is solidified, removing the water-soluble protective ink on the convex surface of the 3D glass by hot water.
Comparative example 1
The comparative example provides a water-soluble protective ink, which comprises the following components in parts by mass of 100 parts: 90 parts of water-soluble acrylate oligomer, 0.2 part of wetting agent, 0.5 part of defoamer, 0.8 part of color paste, 1 part of sodium hydroxide and 7.5 parts of purified water.
The preparation method of the water-soluble protective ink comprises the following steps: and sequentially adding the corresponding water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water into a container, stirring and adding the mixture, and stirring the mixture until the mixture is completely and uniformly dispersed to obtain the water-soluble protective ink.
The water-based protective ink is used for a front method for protecting the glass of a rear cover of a mobile phone from acid etching, and the method comprises the following steps:
step one, preparing the water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, after the acid-resistant protective ink on the concave surface of the 3D glass is solidified, removing the water-soluble protective ink on the convex surface of the 3D glass by hot water.
Comparative example 2
The comparative example provides a water-soluble protective ink, which comprises the following components in parts by mass of 100 parts: 90 parts of water-soluble acrylate oligomer, 0.2 part of wetting agent, 1 part of defoamer, 0.8 part of color paste, 6 parts of sodium hydroxide and 7 parts of purified water.
The preparation method of the water-soluble protective ink comprises the following steps: and sequentially adding the corresponding water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water into a container, stirring and adding the mixture, and stirring the mixture until the mixture is completely and uniformly dispersed to obtain the water-soluble protective ink.
The water-based protective ink is used for a front method for protecting the glass of a rear cover of a mobile phone from acid etching, and the method comprises the following steps:
step one, preparing the water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
and thirdly, after the acid-resistant protective ink on the concave surface of the 3D glass is solidified, removing the water-soluble protective ink on the convex surface of the 3D glass by hot water.
The water-soluble protective inks prepared in examples 1 to 3 and comparative examples 1 and 2 were tested, and the ink adhesion effect and removal effect were tested after the water-soluble protective ink was applied to the rear cover glass of a mobile phone. The test results are shown in table 1:
table 1 shows the water-soluble protective ink test data for examples 1-3 and comparative examples 1 and 2
From the data, we can see that the water-soluble protective ink prepared in the embodiment 1-3 is clear and transparent, has moderate viscosity, good film forming effect, good adhesive force to the rear cover glass of the mobile phone, short deinking time, easy removal and no damage to the rear cover glass of the mobile phone after deinking. As can be seen from the detection data in comparative example 1, the too small amount of the defoamer can affect the film forming effect of the water-soluble protective ink on the rear cover glass of the mobile phone, so that bubbles appear in the protective film to affect the film forming effect. Although the adhesion is not affected, bubbles may increase the risk of infiltration. As can be seen from the detection data of comparative example 2, the excessive addition of sodium hydroxide causes damage to the glass of the rear cover of the mobile phone by the water-soluble protective ink, so that the dosage of the water-soluble protective ink needs to be strictly controlled. As can be seen from the data in example 1, example 2 and comparative example 2, the addition of sodium hydroxide has a great influence on the hot water removal time of the water-soluble protective ink, and too small an addition amount of sodium hydroxide prolongs the hot water deinking time, and too large an addition amount of sodium hydroxide can greatly shorten the hot water deinking time, but can damage the rear cover glass of the mobile phone.
The present invention has been described in detail with reference to the embodiments, and it should be noted that the specific features described in the above embodiments may be modified in combination by any suitable means without contradiction, and the present invention will not be described in any way. Further, other modifications and combinations of the features of the invention, as well as other variations and combinations of the features of the invention, are also contemplated as being within the scope of the invention.
Claims (8)
1. The front method for protecting the acid etching of the back cover glass of the mobile phone is characterized by comprising the following steps of:
step one, preparing water-soluble protective printing ink;
spraying a layer of water-soluble protective ink on the convex surface of the 3D glass, and spraying acid-resistant protective ink on the concave surface of the 3D glass after the water-soluble protective ink is solidified;
step three, after the acid-resistant protective ink on the concave surface of the 3D glass is solidified, removing the water-soluble protective ink on the convex surface of the 3D glass;
wherein, the water-soluble protective ink comprises the following components in parts by mass of 100 parts: 80 to 90 parts of water-soluble acrylate oligomer, 0.1 to 0.5 part of wetting agent, 1 to 2 parts of defoamer, 0.6 to 1 part of color paste, 1 to 3 parts of sodium hydroxide and the balance of purified water.
2. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 1, which is characterized in that: the water-soluble acrylate oligomer comprises the following components in percentage by mass: 5-10 parts of acrylic acid, 10-20 parts of methacrylic acid, 25-45 parts of butyl acrylate, 0.6-1 part of azodiisobutyronitrile, 30-50 parts of ethanol and a proper amount of ammonia water are used for adjusting the pH value of the water-soluble acrylate oligomer to obtain the pH value.
3. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 2, which is characterized in that: the preparation method of the water-soluble acrylate oligomer comprises the following steps: adding ethanol into a reaction kettle with a condensation reflux device, a constant pressure dropwise adding device and a temperature display and stirring device, heating the ethanol to the reflux temperature of 85+/-5 ℃, dropwise adding a uniform mixture of acrylic acid, methacrylic acid, butyl acrylate and azodiisobutyronitrile into the reaction kettle in the form of broken beads after the reflux is stable, stabilizing the temperature to 90 ℃, carrying out heat preservation reaction for 4 hours to obtain an acrylic ester mixed solution, cooling the acrylic ester mixed solution to 60 ℃, adding ammonia water to neutralize the acrylic ester mixed solution to the pH value of 8.0-9.0, and finally carrying out vacuum filtration to remove most of the ethanol to obtain the water-soluble acrylic ester oligomer.
4. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 1, which is characterized in that: the wetting agent is one of nonionic fluorocarbon polymer compounds or polyether organic silicon compounds.
5. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 1, which is characterized in that: the defoamer is BYK-054.
6. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 1, which is characterized in that: the color paste is water-based blue.
7. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 1, which is characterized in that: the preparation method of the water-soluble protective ink comprises the following steps: adding while stirring, adding corresponding water-soluble acrylate oligomer, film forming agent, wetting agent, defoamer, color paste, sodium hydroxide and purified water into a container, and stirring until the water-soluble acrylate oligomer, the film forming agent, the wetting agent, the defoamer, the color paste, the sodium hydroxide and the purified water are completely dispersed uniformly to obtain the water-soluble protective ink.
8. The pre-method for protecting the rear cover glass of the mobile phone from acid etching according to claim 1, which is characterized in that: the water-soluble protective ink removing method is that the rear cover glass is kept stand in hot water at 90 ℃ for 3-10min, and deinking can be completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310604938.3A CN116675441A (en) | 2023-05-26 | 2023-05-26 | Front method for protecting rear cover glass of mobile phone from acid etching |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310604938.3A CN116675441A (en) | 2023-05-26 | 2023-05-26 | Front method for protecting rear cover glass of mobile phone from acid etching |
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| CN116675441A true CN116675441A (en) | 2023-09-01 |
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| CN202310604938.3A Pending CN116675441A (en) | 2023-05-26 | 2023-05-26 | Front method for protecting rear cover glass of mobile phone from acid etching |
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- 2023-05-26 CN CN202310604938.3A patent/CN116675441A/en active Pending
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