CN107880297A - The high abrasion button of resistance to alcohol and its processing technology - Google Patents
The high abrasion button of resistance to alcohol and its processing technology Download PDFInfo
- Publication number
- CN107880297A CN107880297A CN201711127145.8A CN201711127145A CN107880297A CN 107880297 A CN107880297 A CN 107880297A CN 201711127145 A CN201711127145 A CN 201711127145A CN 107880297 A CN107880297 A CN 107880297A
- Authority
- CN
- China
- Prior art keywords
- silica gel
- parts
- main body
- button
- protective coatings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000005299 abrasion Methods 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 title claims abstract description 17
- 238000005516 engineering process Methods 0.000 title claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000741 silica gel Substances 0.000 claims abstract description 39
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 39
- 239000011253 protective coating Substances 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 238000009500 colour coating Methods 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 8
- 239000004814 polyurethane Substances 0.000 claims description 37
- 238000005507 spraying Methods 0.000 claims description 23
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 18
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 18
- 229940043265 methyl isobutyl ketone Drugs 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 229920005749 polyurethane resin Polymers 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims 1
- 230000004224 protection Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000007493 shaping process Methods 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 description 4
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention discloses a kind of high abrasion button of resistance to alcohol and its processing technology; including silica gel main body, character coating, color coating and PU protective coatings; the character coating is at least provided with the part of the upper surface of silica gel main body; the top of the character coating is covered on the upper surface and each side of button covered with color coating, the PU protective coatings.During shaping; silica gel main body is produced in a manner of oil pressure is molded; character coating and color coating are set on the surface of silica gel main body again; and then make cutting character processing; finally spray PU protective coatings; because PU protective coatings have high abrasion, resistance to alcohol characteristic; after appearance being covered in PU protective coatings; RCA frictions are carried out to can reach 4000 times; alcohol friction is not faded up to 10000 tests; solves the problem of conventional common coating RCA rubs and alcohol friction testing can not be taken into account, and can only test 500 times or so.
Description
Technical field
The present invention relates to button art, refers in particular to a kind of high abrasion button of resistance to alcohol on intercom and its adds
Work technique.
Background technology
The use of button is very universal, and the various instruments such as mobile phone, keyboard, telephone set, intercom, which have, be unable to do without button.With
The continuous development of industry-by-industry, people are to the outward appearance of button and the requirement more and more higher of function.
According to market needs, intercom is applied to the occasions such as commander's road traffic, security administration, especially in recent years to wine
Drive investigation it is particularly severe, the button of conventional intercom adds the pre- possibility to alcohol class I liquid I, causes to spray superincumbent word
Symbol is easier to be worn away, and wearability and alcohol resistance are poor.In addition, during conventional use of, button easily by hand perspiration or
The pollution of grease and change colour, so as to have a strong impact on the appearance of button.
The content of the invention
In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of resistance to alcohol of high abrasion to the present invention
Button and its processing technology, its is extremely durable, so as to overcome the deficiencies in the prior art.
To achieve the above object, the present invention is using following technical scheme：
A kind of processing technology of the high abrasion button of resistance to alcohol, comprises the following steps
（1）Oil pressure is molded silica gel main body：Silica gel materials are put into hydraulic molding machine and produce silica gel main body；
（2）Cleaning：Silica gel main body is crossed into clear water to clean, then air-dried；
（3）Spray character color：The specific character of the surface spraying of silica gel main body, word, pattern at least one, then dry
It is dry；
（4）Spray complexion：In the surface spraying color of silica gel main body, button is assigned color, then dry；
（5）Cutting：Corresponding product character is cut out with cutting machine, then inserts in Rinsing Area and is cleaned, drying is laggard in meditation
Electric dust-removing equipment removes surface dirt, makes surface cleaning；
（6）Spray PU protective coatings：Spraying PU protective coatings is needed to realize twice, and 160 DEG C/0.5H is carried out after spraying PU for the first time
Baking, then second of spraying PU, then carry out 160 DEG C/0.5H and repeat to toast；The material of the PU protective coatings presses mass parts,
Mainly include following composition：
Polyurethane resin 35-50 parts
Silica 0-5 parts
Ethyl acetate 20-30 parts
Methyl iso-butyl ketone (MIBK) 20-30 parts
Abrasion-resistant powder 15-20 parts.
As a kind of preferred scheme, the material of the PU protective coatings presses mass parts, mainly including following composition：
42 parts of polyurethane resin
2 parts of silica
25 parts of ethyl acetate
25 parts of methyl iso-butyl ketone (MIBK)
17 parts of abrasion-resistant powder.
As a kind of preferred scheme, the step（3）And step（4）In, drying is at 165 DEG C -195 DEG C using infrared ray
At a temperature of, dry 25min..
A kind of high abrasion button of resistance to alcohol, is made of the processing technology of the high abrasion button of resistance to alcohol, the high abrasion button of resistance to alcohol
Structure include silica gel main body, character coating, color coating and PU protective coatings, the character coating is at least provided with silica gel main body
Upper surface part, the top of the character coating is covered in the upper table of button covered with color coating, the PU protective coatings
On face and each side.
As a kind of preferred scheme, the silica gel main body is tetragonal body structure.
As a kind of preferred scheme, the PU protective coatings include being covered in the Part I of top surface and are covered in side
Part II, the thickness of the Part I are more than the thickness of Part II.
The present invention has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technical proposal
Understanding, it mainly devises a kind of high abrasion button of resistance to alcohol, and silica gel main body is produced in a manner of oil pressure is molded, then in silica gel
The surface of main body sets character coating and color coating, and then makees cutting character processing, PU protective coatings is finally sprayed, due to PU
Protective coating has high abrasion, resistance to alcohol characteristic, after being covered in appearance with PU protective coatings, carries out RCA frictions and can reach 4000 times,
Alcohol friction is not faded up to 10000 tests, solves conventional common coating RCA frictions and alcohol friction testing can not be simultaneous
Care for, the problem of 500 times or so can only be tested.
More clearly to illustrate the architectural feature and effect of the present invention, come below in conjunction with the accompanying drawings with specific embodiment to this hair
It is bright to be described in detail.
Brief description of the drawings
Fig. 1 is the schematic diagram after the entire row button shaping of embodiments of the present invention.
Fig. 2 is the sectional view of the simple grain button finished product of embodiments of the present invention.
Accompanying drawing identifier declaration：
10th, silica gel main body 20, character coating
30th, color coating 40, PU protective coatings
41st, Part I 42, Part II.
Embodiment
It refer to shown in Fig. 1 and Fig. 2, that show the concrete structure of the preferred embodiments of the invention, is a kind of high resistance to
The button of resistance to alcohol and its processing technology are ground, wherein, processing technology comprises the following steps
（1）Oil pressure is molded silica gel main body：Silica gel materials are put into hydraulic molding machine and produce silica gel main body；
（2）Cleaning：Silica gel main body is crossed into clear water to clean, then air-dried；
（3）Spray character color：The specific character of the surface spraying of silica gel main body, word, pattern at least one, then dry
It is dry；
（4）Spray complexion：In the surface spraying color of silica gel main body, button is assigned color, then dry；
（5）Cutting：Corresponding product character is cut out with cutting machine, then inserts in Rinsing Area and is cleaned, drying is laggard in meditation
Electric dust-removing equipment removes surface dirt, makes surface cleaning；
（6）Spray PU protective coatings：Spraying PU protective coatings is needed to realize twice, and 160 DEG C/0.5H is carried out after spraying PU for the first time
Baking, then second of spraying PU, then carry out 160 DEG C/0.5H and repeat to toast；The material of the PU protective coatings presses mass parts,
Mainly include following composition：
Polyurethane resin 35-50 parts
Silica 0-5 parts
Ethyl acetate 20-30 parts
Methyl iso-butyl ketone (MIBK) 20-30 parts
Abrasion-resistant powder 15-20 parts
Preparation method is：Polyurethane resin, silica, ethyl acetate, methyl iso-butyl ketone (MIBK), abrasion-resistant powder are heated to 90-100
DEG C, stirring 30-40 minutes produce.
Wherein, the step（3）And step（4）In, drying is using infrared ray at a temperature of 165 DEG C -195 DEG C, is dried
Dry 25min..
Embodiment one
Spraying PU protective coatings material presses mass parts, mainly including following composition：42 parts of polyurethane resin, 2 parts of silica, second
25 parts of acetoacetic ester, 25 parts of methyl iso-butyl ketone (MIBK), 17 parts of abrasion-resistant powder.Various compositions are heated to 90 DEG C, stirring produces for 30 minutes.
Embodiment two
Spraying PU protective coatings material presses mass parts, mainly including following composition：35 parts of polyurethane resin, 5 parts of silica, second
20 parts of acetoacetic ester, 30 parts of methyl iso-butyl ketone (MIBK), 15 parts of abrasion-resistant powder.Various compositions are heated to 95 DEG C, stirring produces for 32 minutes.
Embodiment three
Spraying PU protective coatings material presses mass parts, mainly including following composition：50 parts of polyurethane resin, 0 part of silica, second
30 parts of acetoacetic ester, 20 parts of methyl iso-butyl ketone (MIBK), 20 parts of abrasion-resistant powder.Various compositions are heated to 100 DEG C, stirring produces for 40 minutes.
It refer to shown in Fig. 1 and Fig. 2, that show a kind of concrete structure of high abrasion button of resistance to alcohol of the present invention, be
It is made of above-mentioned processing technology, including silica gel main body 10, character coating 20, color coating 30 and PU protective coatings 40, the word
Coating 20 is accorded with least provided with the part of the upper surface of silica gel main body 10, the top of the character coating 20 is covered with color coating
30, the PU protective coatings 40 are covered on the upper surface and each side of button.
Wherein, PU protective coatings 40 have high abrasion, resistance to alcohol characteristic, using the strong matrix resin of frictional property, attrition resistant inorganic
Filler, improve processing procedure construction technology, be once adjusted to spraying twice by spraying, RCA (sand paper) rubs and can reach 4000 after improvement
Secondary, alcohol friction is up to 10000 times.Solving conventional common coating RCA frictions and alcohol friction testing can not take into account, and can only survey
The problem of trying 500 times or so.
In the present embodiment, the silica gel main body 10 is tetragonal body structure, is the material using the shaping of silica gel oil pressure.Silica gel master
After the shaping of the oil pressure of body 10, then character coating 20 is sprayed, then paint color coating 30, and then cut character, finally sprayed PU and protect
Protect coating 40.160 DEG C/0.5H bakings are carried out after spraying PU for the first time, then second of spraying PU of spraying, then carry out repeating baking
It is roasting.
More specifically, the PU protective coatings 40 include the Part I 41 for being covered in top surface and be covered in side the
Two parts 42, the thickness of the Part I 41 are more than the thickness of Part II 42.For example, the maximum gauge of the Part II 42
Can be 350um, the thickness of Part II 42 can be 100-120um.The thickness of the silica gel main body 10 can be 50-
60mm.The thickness of the character coating 20 can be 100-120um.The thickness of the color coating 30 can be 50-70um.
In summary, design focal point of the invention is, it mainly devises a kind of high abrasion button of resistance to alcohol, with oil pressure
The mode of shaping produces silica gel main body 10, then sets character coating 20 and color coating 30 on the surface of silica gel main body 10, enters
And make cutting character processing, and PU protective coatings 40 are finally sprayed, because PU protective coatings 40 have high abrasion, resistance to alcohol characteristic, with
After PU protective coatings 40 are covered in appearance, carry out RCA frictions and can reach 4000 times, alcohol friction is not moved back up to 10000 tests
Color, solves the problem of conventional common coating RCA rubs and alcohol friction testing can not be taken into account, and can only test 500 times or so.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore any subtle modifications, equivalent variations and modifications that every technical spirit according to the present invention is made to above example, still
Belong in the range of technical solution of the present invention.
Claims (6)
- A kind of 1. processing technology of the high abrasion button of resistance to alcohol, it is characterised in that：Comprise the following steps（1）Oil pressure is molded silica gel main body：Silica gel materials are put into hydraulic molding machine and produce silica gel main body；（2）Cleaning：Silica gel main body is crossed into clear water to clean, then air-dried；（3）Spray character color：The specific character of the surface spraying of silica gel main body, word, pattern at least one, then dry It is dry；（4）Spray complexion：In the surface spraying color of silica gel main body, button is assigned color, then dry；（5）Cutting：Corresponding product character is cut out with cutting machine, then inserts in Rinsing Area and is cleaned, drying is laggard in meditation Electric dust-removing equipment removes surface dirt, makes surface cleaning；（6）Spray PU protective coatings：Spraying PU protective coatings is needed to realize twice, and 160 DEG C/0.5H is carried out after spraying PU for the first time Baking, then second of spraying PU, then carry out 160 DEG C/0.5H and repeat to toast；The material of the PU protective coatings presses mass parts, Mainly include following composition：Polyurethane resin 35-50 partsSilica 0-5 partsEthyl acetate 20-30 partsMethyl iso-butyl ketone (MIBK) 20-30 partsAbrasion-resistant powder 15-20 parts.
- 2. the processing technology of the high abrasion button of resistance to alcohol according to claim 1, it is characterised in that：The PU protective coatings Material presses mass parts, mainly including following composition：42 parts of polyurethane resin2 parts of silica25 parts of ethyl acetate25 parts of methyl iso-butyl ketone (MIBK)17 parts of abrasion-resistant powder.
- 3. the processing technology of the high abrasion button of resistance to alcohol according to claim 1, it is characterised in that：The step（3）And step Suddenly（4）In, drying is using infrared ray at a temperature of 165 DEG C -195 DEG C, dries 25min..
- A kind of 4. high abrasion button of resistance to alcohol, it is characterised in that：It is made of the processing technology of claim 1, the resistance to alcohol of the high abrasion The structure of button includes silica gel main body（10）, character coating（20）, color coating（30）With PU protective coatings（40）, character painting Layer is at least provided with the part of the upper surface of silica gel main body, and the top of the character coating is covered with color coating, the PU protections Coating is covered on the upper surface and each side of button.
- 5. the high abrasion button of resistance to alcohol according to claim 4, it is characterised in that：The silica gel main body（10）For tetragonal body knot Structure.
- 6. the high abrasion button of resistance to alcohol according to claim 4, it is characterised in that：The PU protective coatings（40）Including covering In the Part I of top surface（41）With the Part II for being covered in side（42）, the thickness of the Part I is more than Part II Thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127145.8A CN107880297A (en) | 2017-11-15 | 2017-11-15 | The high abrasion button of resistance to alcohol and its processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127145.8A CN107880297A (en) | 2017-11-15 | 2017-11-15 | The high abrasion button of resistance to alcohol and its processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107880297A true CN107880297A (en) | 2018-04-06 |
Family
ID=61777125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711127145.8A Pending CN107880297A (en) | 2017-11-15 | 2017-11-15 | The high abrasion button of resistance to alcohol and its processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107880297A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110358424A (en) * | 2019-06-11 | 2019-10-22 | 浙江伟星实业发展股份有限公司 | A kind of spray painting major ingredient and sand glaze paint for button |
| CN113022178A (en) * | 2021-03-12 | 2021-06-25 | 东莞万德电子制品有限公司 | Silica gel four-color printing process |
| CN113150350A (en) * | 2021-04-30 | 2021-07-23 | 蔡常勇 | Processing technology of high-wear-resistance silica gel gasket |
| CN115537145A (en) * | 2022-09-30 | 2022-12-30 | 江苏天顺印业有限公司 | Heat transfer printing protective layer, high alcohol resistance heat transfer printing film and preparation method thereof |
| CN117995586A (en) * | 2024-04-03 | 2024-05-07 | 石狮市星盛五金制品有限公司 | Mobile phone key with high durability and preparation process |
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| CN110358424A (en) * | 2019-06-11 | 2019-10-22 | 浙江伟星实业发展股份有限公司 | A kind of spray painting major ingredient and sand glaze paint for button |
| CN113022178A (en) * | 2021-03-12 | 2021-06-25 | 东莞万德电子制品有限公司 | Silica gel four-color printing process |
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