CN113119615B - Non-sand-hole printing method for semitransparent material - Google Patents
Non-sand-hole printing method for semitransparent material Download PDFInfo
- Publication number
- CN113119615B CN113119615B CN201911415802.8A CN201911415802A CN113119615B CN 113119615 B CN113119615 B CN 113119615B CN 201911415802 A CN201911415802 A CN 201911415802A CN 113119615 B CN113119615 B CN 113119615B
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- screen
- silica sol
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- 238000007639 printing Methods 0.000 title claims abstract description 52
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007650 screen-printing Methods 0.000 claims abstract description 12
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000000839 emulsion Substances 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 12
- 239000004814 polyurethane Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 9
- 229920000178 Acrylic resin Polymers 0.000 claims description 9
- 229920001169 thermoplastic Polymers 0.000 claims description 9
- 239000004416 thermosoftening plastic Substances 0.000 claims description 9
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 6
- 150000002513 isocyanates Chemical class 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 5
- 239000000908 ammonium hydroxide Substances 0.000 claims description 5
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 201000001371 inclusion conjunctivitis Diseases 0.000 claims 1
- 206010044325 trachoma Diseases 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 7
- 239000003292 glue Substances 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C09D11/04—Printing inks based on proteins
-
- 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
- C09D11/06—Printing inks based on fatty oils
-
- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Printing Methods (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a sand-hole-free printing method of a semitransparent material, which comprises the following steps of: (1) Printing a layer of primer on the frosted surface of the semitransparent material by adopting a screen printing mode; and (2) printing the set color on the surface of the primer. Compared with the prior art, the invention has the advantages of reduced cost, no sand hole and the like.
Description
Technical Field
The invention relates to a printing process of a semitransparent material, in particular to a non-sand-hole printing method of the semitransparent material.
Background
The semitransparent material is a material with light transmittance of less than 80%, and is generally obtained by polishing one surface of a pure transparent material into a frosted surface, so that one surface of the semitransparent material is a mirror surface, and the other surface of the semitransparent material is a frosted surface.
The semitransparent material has wide application in the scientific fields of industrial production, biomedicine, information communication and the like. With the technical development and demand increase of consumer electronics products such as smart phones, LEDs, tablet computers, touch screens, smart watches and the like, because translucent materials have excellent texture and good touch feeling, and the demand of industrial markets for translucent materials is increasing day by day, translucent materials are often adopted as base materials, coatings with different colors are printed on frosted surfaces of the base materials, and materials with different colors are obtained, so that various products with touch texture, such as mobile phone shells, toys and the like, are manufactured.
However, due to the fact that the frosted surface of the semitransparent material is uneven, the printing pigment is easy to be colorless at the position of the local convex point due to the fluidity, sand holes appear on the surface, and in order to reduce or avoid the sand holes, the convex points are covered by multiple times of printing at the present stage, so that cost floating is directly caused.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a low-cost method for non-glare printing of translucent materials.
The purpose of the invention can be realized by the following technical scheme: a method of non-veining printing of translucent materials, comprising the steps of:
(1) Printing a layer of primer on the frosted surface of the semitransparent material by adopting a screen printing mode;
(2) And printing the set color on the surface of the primer.
The primer comprises the following components in parts by weight:
50-70 parts of polyurethane emulsion resin;
20-30 parts of thermoplastic acrylic resin;
10-20 parts of vinyl acetate;
20-30 parts of modified silica sol;
1-3 parts of ammonium hydroxide;
1-3 parts of a drier;
5-10 parts of a curing agent;
3-10 parts of a solvent.
The viscosity of the polyurethane emulsion resin is 50-150mPa s.
The modified silica sol is prepared by mixing silica particles and silica sol in a mass ratio of 1-6-10, wherein the particle size of the silica particles is 400-600 meshes.
The curing agent is hydrophilic isocyanate curing agent;
the drier is dibutyltin dilaurate.
The solvent is deionized water or propylene glycol methyl ether acetate.
The silk-screen printing conditions of the step (1) are as follows: the mesh number of the printing screen is 600-800 meshes, the printing thickness is 10-20 microns, the printing speed is 1.0-2.0 m/s, the distance between the printing screen and the semitransparent material is 1-2 mm, the scraping angle is 45-60 degrees, and the scraping press-in amount is 3-4 mm.
And (3) after the primer printing in the step (2) is finished, baking for 20-30 seconds at 40-60 ℃, and then printing a set color.
And (3) setting the color of the step (2) to be a commercial colored paint.
Translucent materials include commercially available translucent plastics, glass, crystals, and the like.
Compared with the prior art, the invention has the following advantages:
1. the new printing process avoids the sand hole phenomenon completely, solves the problem of sand hole and reduces the cost.
2. The invention adopts special primer, pits with different depths on the surface of the frosted surface can be filled and covered, and no sand holes can appear when the color ink is printed.
3 the special primer adopted by the invention adopts polyurethane emulsion resin, thermoplastic acrylic resin and vinyl acetate as core resin components, wherein the main chain of the polyurethane emulsion resin contains urethane bonds, the appearance is white and semitransparent, the volatile components of the polyurethane emulsion resin are 30-35 wt%, the pH value is 8-10, and the polyurethane emulsion resin is compounded with the thermoplastic acrylic resin and the vinyl acetate, so that the generation of static electricity of the primer can be prevented, and the adhesive force of the primer is increased.
The thermoplastic acrylic resin can be softened by heating and solidified by cooling repeatedly, is generally a linear macromolecular compound, can be a homopolymer or a copolymer, has good physical and mechanical properties, excellent weather resistance, chemical resistance and water resistance and high gloss and color retention.
The vinyl acetate is colorless liquid and has sweet ether taste; slightly soluble in water, and soluble in alcohol, acetone, benzene, and chloroform. Can be copolymerized, grafted and blocked with polyurethane emulsion resin and thermoplastic acrylic resin to prepare polymer synthetic materials with different properties.
Meanwhile, the surface of the hydrophilic isocyanate curing agent contains a large amount of hydroxyl groups which can be subjected to cross-linking curing reaction with the matrix resin, and in addition, the modified silica sol is added to provide a microporous structure for the primer, so that the density of the primer is reduced, the permeability and the adhesive force of the primer are greatly improved, the curing strength can be improved together with the drier, and the curing time is shortened. The modified silica sol contains silica particles, so that the heat resistance, the scratch resistance and the adhesive strength can be improved, on one hand, the modified silica sol can be well filled and adhered with a semitransparent material, on the other hand, the modified silica sol is firmly combined with a colored paint, and the modified silica sol cannot fade or corrode due to long-term stroking or contact.
4. The invention adopts the screen printing mode to better control the problems of bad sand holes and bad chromatic aberration.
Drawings
FIG. 1 shows a colored paint-bearing material obtained by the method of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
A method of non-trachomatis printing of a translucent material, the method comprising the steps of:
(1) Preparation of the primer
60 parts of polyurethane emulsion resin with the viscosity of 100 mPas; 25 parts of thermoplastic acrylic resin; 15 parts of vinyl acetate; 25 parts of modified silica sol; 2 parts of ammonium hydroxide; 2 parts of dibutyltin dilaurate; 8 parts of hydrophilic isocyanate curing agent; 6 parts of deionized water, and stirring and mixing at normal temperature for 20min to obtain the primer.
The modified silica sol is prepared by mixing silica particles and silica sol in a mass ratio of 1.
(2) Printing a layer of primer on the frosted surface of the translucent glass in a screen printing mode; the conditions of screen printing were: the mesh number of the printing screen plate is 600 meshes, the printing thickness is 15 micrometers, the printing speed is 1.5 m/s, the distance between the printing screen plate and the semitransparent material is 1.5 millimeters, the glue scraping angle is 45 degrees, and the glue scraping press-in amount is 3mm.
(3) After the primer printing is finished, baking is carried out for 30 seconds at 40 ℃, and then the set color is printed on the surface of the primer. The color was set to commercial red paint.
The structure of the obtained product is shown in fig. 1, and comprises three layers from bottom to top: semi-permeable membrane glass 1, primer 2 and colored paint 3.
Example 2
A method of non-trachomatis printing of a translucent material, the method comprising the steps of:
(1) Preparation of the primer
70 parts of polyurethane emulsion resin with the viscosity of 50 mPas; 30 parts of thermoplastic acrylic resin; 10 parts of vinyl acetate; 20 parts of modified silica sol; 1 part of ammonium hydroxide; 1 part of dibutyltin dilaurate; 5 parts of hydrophilic isocyanate curing agent; 3 parts of deionized water, and stirring and mixing for 10min at normal temperature to obtain the primer.
The modified silica sol is prepared by mixing silica particles and silica sol in a mass ratio of 1.
(2) Printing a layer of primer on the frosted surface of the semitransparent crystal by adopting a screen printing mode; the conditions of the screen printing are as follows: the mesh number of the printing screen plate is 600 meshes, the printing thickness is 10 micrometers, the printing speed is 1.0 m/s, the distance between the printing screen plate and the semitransparent material is 1 mm, the glue scraping angle is 45 degrees, and the glue scraping press-in amount is 3mm.
(3) After the primer printing is finished, baking is carried out for 30 seconds at 40 ℃, and then the set color is printed on the surface of the primer. The color was set as a commercial blue paint.
Example 3
A method of non-trachomatis printing of a translucent material, the method comprising the steps of:
(1) Preparation of the primer
50 parts of polyurethane emulsion resin with the viscosity of 150 mPas; 20 parts of thermoplastic acrylic resin; 20 parts of vinyl acetate; 30 parts of modified silica sol; 3 parts of ammonium hydroxide; 3 parts of dibutyltin dilaurate; 10 parts of hydrophilic isocyanate curing agent; 10 parts of propylene glycol methyl ether acetate, and stirring and mixing at normal temperature for 30min to obtain the primer.
The modified silica sol is prepared by mixing silica particles and silica sol in a mass ratio of 1.
(2) Printing a layer of primer on the frosted surface of the semitransparent plastic by adopting a screen printing mode; the conditions of the screen printing are as follows: the mesh number of the printing screen is 800 meshes, the printing thickness is 20 micrometers, the printing speed is 2.0 meters per second, the distance between the printing screen and the semitransparent material is 2 millimeters, the glue scraping angle is 60 degrees, and the glue scraping press-in amount is 4mm.
(3) After the primer is printed, the mixture is baked at 60 ℃ for 20 seconds, and then the set color is printed on the surface of the primer. The color was set to commercial yellow paint.
The properties of the obtained product are shown in the table below
Claims (5)
1. A method of non-trachomatis printing of translucent materials, the method comprising the steps of:
(1) Printing a layer of primer on the frosted surface of the semitransparent material by adopting a screen printing mode;
(2) Printing a set color on the surface of the primer;
the primer comprises the following components in parts by weight:
50-70 parts of polyurethane emulsion resin;
20-30 parts of thermoplastic acrylic resin;
10-20 parts of vinyl acetate;
20-30 parts of modified silica sol;
1-3 parts of ammonium hydroxide;
1-3 parts of a drier;
5-10 parts of a curing agent;
3-10 parts of a solvent;
the modified silica sol is prepared by mixing silica particles and silica sol in a mass ratio of 1-6 to 10, wherein the particle size of the silica particles is 400-600 meshes;
the curing agent is hydrophilic isocyanate curing agent;
the drier is dibutyltin dilaurate;
the solvent is deionized water or propylene glycol methyl ether acetate.
2. The method for non-trachoma printing of a translucent material as recited in claim 1, wherein the viscosity of the polyurethane emulsion resin is 50 to 150 mPa-s.
3. A method for printing a translucent material without a pinhole according to claim 1, wherein the conditions for the screen printing in step (1) are: the mesh number of the printing screen is 600-800 meshes, the printing thickness is 10-20 microns, the printing speed is 1.0-2.0 m/s, the distance between the printing screen and the semitransparent material is 1-2 mm, the scraping angle is 45-60 degrees, and the scraping press-in amount is 3-4 mm.
4. The method for printing a translucent material according to claim 1, wherein the primer in step (1) is baked at 40-60 ℃ for 20-30 seconds after the printing is completed, and the set color is printed.
5. The method for printing a translucent material according to claim 1, wherein the set color of step (2) is a commercial paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415802.8A CN113119615B (en) | 2019-12-31 | 2019-12-31 | Non-sand-hole printing method for semitransparent material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415802.8A CN113119615B (en) | 2019-12-31 | 2019-12-31 | Non-sand-hole printing method for semitransparent material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113119615A CN113119615A (en) | 2021-07-16 |
| CN113119615B true CN113119615B (en) | 2023-02-03 |
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| CN201911415802.8A Active CN113119615B (en) | 2019-12-31 | 2019-12-31 | Non-sand-hole printing method for semitransparent material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3893508B2 (en) * | 2000-01-25 | 2007-03-14 | 平岡織染株式会社 | Surface treatment sheet capable of hot melt bonding |
| AU2012247077B2 (en) * | 2006-12-21 | 2014-01-09 | Agfa Nv | Inkjet printing methods and inkjet ink sets |
| CN101851446A (en) * | 2009-03-31 | 2010-10-06 | 日本精工油墨股份有限公司 | Ink with mirror effect and decorative print |
| CN102277057A (en) * | 2011-07-26 | 2011-12-14 | 东来涂料技术（上海）有限公司 | Conductive priming paint for plastic substrate electrostatic painting and preparation method thereof |
| CN107571654A (en) * | 2017-08-31 | 2018-01-12 | 广东星弛光电科技有限公司 | A kind of printing process of cambered surface color crystal glass |
| CN107841236A (en) * | 2017-10-30 | 2018-03-27 | 芜湖辉灿电子科技有限公司 | A kind of radioresistance mobile phone surface lacquer |
| CN108276898B (en) * | 2017-12-29 | 2020-03-13 | 湖南松井新材料股份有限公司 | Coating material, plastic part with metal effect coating and preparation process thereof |
| CN109354513B (en) * | 2018-10-31 | 2021-07-06 | 北京小米移动软件有限公司 | Ceramic material and preparation method and application thereof |
| CN110482997B (en) * | 2019-08-26 | 2021-10-22 | 安徽科昂纳米科技有限公司 | Preparation method of heat preservation and insulation ball and prepared heat preservation and insulation ball |
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Address after: 201108 the 1 story 1F101 room 2, 2059 metropolitan Road, Minhang District, Shanghai. Patentee after: Shanghai Haobai Zhizao Precision Electronics Co.,Ltd. Address before: 201108 the 1 story 1F101 room 2, 2059 metropolitan Road, Minhang District, Shanghai. Patentee before: HOPINES ELECTRONIC TECHNOLOGY (SHANGHAI) Co.,Ltd. |
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