CN114181419A - Film coating process - Google Patents
Film coating process Download PDFInfo
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- CN114181419A CN114181419A CN202111392160.1A CN202111392160A CN114181419A CN 114181419 A CN114181419 A CN 114181419A CN 202111392160 A CN202111392160 A CN 202111392160A CN 114181419 A CN114181419 A CN 114181419A
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- Prior art keywords
- liquid crystal
- coating
- colloidal solution
- crystal polymer
- mass ratio
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007888 film coating Substances 0.000 title description 4
- 238000009501 film coating Methods 0.000 title description 4
- 238000000576 coating method Methods 0.000 claims abstract description 51
- 239000011248 coating agent Substances 0.000 claims abstract description 41
- 229920000106 Liquid crystal polymer Polymers 0.000 claims abstract description 39
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 230000007062 hydrolysis Effects 0.000 claims abstract description 10
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000006068 polycondensation reaction Methods 0.000 claims abstract description 10
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 40
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 20
- DMLAVOWQYNRWNQ-UHFFFAOYSA-N azobenzene Chemical compound C1=CC=CC=C1N=NC1=CC=CC=C1 DMLAVOWQYNRWNQ-UHFFFAOYSA-N 0.000 claims description 10
- 229920000058 polyacrylate Polymers 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 8
- 239000005264 High molar mass liquid crystal Substances 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- 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
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/12—Polymers characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a coating process, which comprises the following steps: 1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution; 2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and a water bath, fully stirring and standing to form gel; 3) coating the gel on a PET sheet by using a coating machine; 4) and coating a protective film after coating, then baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet. This application utilizes the coating machine coating with polymer gel on the PET sheet again through forming polymer liquid crystal gel, and its simple process.
Description
Technical Field
The invention relates to the technical field of film coating, in particular to a film coating process.
Background
At present, the traditional plating film adopts an electroplating mode, and in recent years, with the wide application of high polymer materials, some polymer liquid crystal films are also appeared, wherein liquid crystal photochromic polymers are used as materials, and the polymers combine the optical property of liquid crystal and the mechanical property of the polymers. They can rapidly change the molecular direction under the influence of an external field to form a coating or film. When light affects such polymers, the optical properties of the polymers change, and different colors are displayed by reflecting light of different wavelengths. The existing polymer liquid crystal film generally adopts a chemical synthesis method, and the process is complex.
Disclosure of Invention
The present invention is directed to a coating process to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and a water bath, fully stirring and standing to form gel;
3) coating the gel on a PET sheet by using a coating machine;
4) and coating a protective film after coating, then baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet.
Preferably, the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.3-0.5: 1-1.1.
Preferably, the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.3-0.4: 1-1.1.
Preferably, the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.3: 1.
preferably, the liquid crystal polymer liquid is formed by dissolving azobenzene cross-linked liquid crystal polymer in tetrahydrofuran;
or, the polyacrylate azo polymer is dissolved in tetrahydrofuran.
Preferably, the mass ratio of the azobenzene crosslinked liquid crystal polymer to tetrahydrofuran is 1: 1-1.5;
or the mass ratio of the polyacrylate azo polymer to the tetrahydrofuran is 1: 1-1.5.
Preferably, in the step 4), the baking temperature of the tunnel furnace is 90-105 ℃ and the baking time is 5-15S.
Preferably, in step 4), the thickness of the liquid crystal film is 1.5 to 3 nm.
This application utilizes the coating machine coating with polymer gel on the PET sheet again through forming polymer liquid crystal gel, and its simple process.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
Example 1:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and in a water bath (the temperature is controlled at 120 ℃), wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.1: 1. fully stirring and standing to form gel; the liquid crystal polymer liquid is formed by dissolving azobenzene cross-linked liquid crystal polymer in tetrahydrofuran; the mass ratio of the azobenzene crosslinked liquid crystal polymer to tetrahydrofuran is 1: 1.3;
3) coating the gel on a PET sheet by using a coating machine;
4) coating a protective film after coating, baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet, wherein the baking temperature in the tunnel furnace is 90 ℃ and the baking time is 5S; the thickness of the liquid crystal film is 1.5 nm.
Example 2:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and in a water bath (the temperature is controlled at 130 ℃), wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.1: 1.1. fully stirring and standing to form gel; the liquid crystal polymer liquid is formed by dissolving azobenzene cross-linked liquid crystal polymer in tetrahydrofuran; the mass ratio of the azobenzene crosslinked liquid crystal polymer to tetrahydrofuran is 1: 1.4;
3) coating the gel on a PET sheet by using a coating machine;
4) coating a protective film after coating, baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet, wherein the baking temperature in the tunnel furnace is 100 ℃ and the baking time is 10S; the thickness of the liquid crystal film is 2 nm.
Example 3:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and in a water bath (the temperature is controlled at 140 ℃), wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.15: 1. fully stirring and standing to form gel; the liquid crystal polymer liquid is formed by dissolving azobenzene cross-linked liquid crystal polymer in tetrahydrofuran; the mass ratio of the azobenzene crosslinked liquid crystal polymer to tetrahydrofuran is 1: 1.5;
3) coating the gel on a PET sheet by using a coating machine;
4) coating a protective film after coating, baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet, wherein the baking temperature in the tunnel furnace is 120 ℃ and the baking time is 15S; the thickness of the liquid crystal film is 3 nm.
Example 4:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and in a water bath (the temperature is controlled at 120 ℃), wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.1: 1. fully stirring and standing to form gel; the liquid crystal polymer liquid is formed by dissolving polyacrylate azo polymer in tetrahydrofuran; the mass ratio of the polyacrylate azo polymer to the tetrahydrofuran is 1: 1.3;
3) coating the gel on a PET sheet by using a coating machine;
4) coating a protective film after coating, baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet, wherein the baking temperature in the tunnel furnace is 90 ℃ and the baking time is 5S; the thickness of the liquid crystal film is 1.5 nm.
Example 5:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and in a water bath (the temperature is controlled at 130 ℃), wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.1: 1.1. fully stirring and standing to form gel; the liquid crystal polymer liquid is formed by dissolving polyacrylate azo polymer in tetrahydrofuran; the mass ratio of the polyacrylate azo polymer to the tetrahydrofuran is 1: 1.4;
3) coating the gel on a PET sheet by using a coating machine;
4) coating a protective film after coating, baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet, wherein the baking temperature in the tunnel furnace is 100 ℃ and the baking time is 10S; the thickness of the liquid crystal film is 2 nm.
Example 6:
a coating process comprises the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and in a water bath (the temperature is controlled at 140 ℃), wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.15: 1. fully stirring and standing to form gel; the liquid crystal polymer liquid is formed by dissolving polyacrylate azo polymer in tetrahydrofuran; the mass ratio of the polyacrylate azo polymer to the tetrahydrofuran is 1: 1.5;
3) coating the gel on a PET sheet by using a coating machine;
4) coating a protective film after coating, baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet, wherein the baking temperature in the tunnel furnace is 120 ℃ and the baking time is 15S; the thickness of the liquid crystal film is 3 nm.
Examples 1 to 6, which employ the principle: because silicon dioxide is a commonly used material for liquid crystal materials, and an intermediate product colloidal solution (mainly the colloidal solution of silicon dioxide) can be obtained by mixing methyl orthosilicate and water for hydrolysis and polycondensation reaction, the colloidal solution of silicon dioxide can be formed into gel after water bath reaction, and by utilizing the characteristic, the colloidal solution of silicon dioxide and a high polymer liquid crystal material are fused to form gel, and the gel is coated on a PET sheet.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. A coating process is characterized by comprising the following steps:
1) mixing methyl orthosilicate and water to carry out hydrolysis and polycondensation reaction to obtain a colloidal solution;
2) putting the colloidal solution obtained in the step 1) into a beaker, adding liquid crystal polymer liquid under a shading condition and a water bath, fully stirring and standing to form gel;
3) coating the gel on a PET sheet by using a coating machine;
4) and coating a protective film after coating, then baking in a tunnel furnace, performing UV off-line curing after baking, tearing off the protective film after curing, and forming a liquid crystal film on the PET sheet.
2. The plating process according to claim 1, wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.1-0.2: 1-1.1.
3. The plating process according to claim 2, wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.15-0.2: 1-1.1.
4. The plating process according to claim 3, wherein the mass ratio of the colloidal solution to the liquid crystal polymer liquid is 0.15: 1.
5. the plating process according to claim 1, wherein the liquid crystal polymer liquid is formed by dissolving azobenzene cross-linked liquid crystal polymer in tetrahydrofuran;
or, the polyacrylate azo polymer is dissolved in tetrahydrofuran.
6. The plating process according to claim 5, wherein the mass ratio of the azobenzene crosslinked liquid crystal polymer to the tetrahydrofuran is 1: 1-1.5;
or the mass ratio of the polyacrylate azo polymer to the tetrahydrofuran is 1: 1-1.5.
7. The plating process according to claim 1, wherein in the step 4), the tunnel furnace is baked at 90-105 ℃ for 5-15S.
8. The plating process according to claim 1, wherein in the step 4), the thickness of the liquid crystal film is 1.5 to 3 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392160.1A CN114181419A (en) | 2021-11-23 | 2021-11-23 | Film coating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111392160.1A CN114181419A (en) | 2021-11-23 | 2021-11-23 | Film coating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114181419A true CN114181419A (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111392160.1A Pending CN114181419A (en) | 2021-11-23 | 2021-11-23 | Film coating process |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789130A (en) * | 2012-08-06 | 2012-11-21 | 深圳市宏瑞新材料科技有限公司 | Negative film protecting film and production method thereof |
| CN110317548A (en) * | 2019-06-28 | 2019-10-11 | 昆山博益鑫成高分子材料有限公司 | A kind of mixed nanometer high temperature resistant PET protection film and preparation method thereof |
| CN112959835A (en) * | 2021-02-02 | 2021-06-15 | 东莞正广精密科技有限公司 | Processing technology of mobile phone back shell |
| CN113183377A (en) * | 2021-05-14 | 2021-07-30 | 浙江凯信光电科技有限公司 | Liquid crystal high polymer coating transfer process based on optical lens or polarizing film |
-
2021
- 2021-11-23 CN CN202111392160.1A patent/CN114181419A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789130A (en) * | 2012-08-06 | 2012-11-21 | 深圳市宏瑞新材料科技有限公司 | Negative film protecting film and production method thereof |
| CN110317548A (en) * | 2019-06-28 | 2019-10-11 | 昆山博益鑫成高分子材料有限公司 | A kind of mixed nanometer high temperature resistant PET protection film and preparation method thereof |
| CN112959835A (en) * | 2021-02-02 | 2021-06-15 | 东莞正广精密科技有限公司 | Processing technology of mobile phone back shell |
| CN113183377A (en) * | 2021-05-14 | 2021-07-30 | 浙江凯信光电科技有限公司 | Liquid crystal high polymer coating transfer process based on optical lens or polarizing film |
Non-Patent Citations (2)
| Title |
|---|
| 夏法锋等: "《机械零件表面沉积纳米镀层及测试技术》", 31 May 2011 * |
| 李倩等: "纳米二氧化硅增强液晶复合凝胶" * |
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Application publication date: 20220315 |