CN117741851B - High-contrast total-color reflective polarizer and preparation method thereof - Google Patents
High-contrast total-color reflective polarizer and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 35
- 238000009792 diffusion process Methods 0.000 claims abstract description 8
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- 239000000178 monomer Substances 0.000 claims description 54
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- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 7
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- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 claims description 6
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 6
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- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 claims description 6
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Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides a high-contrast full-color reflective polarizer and a preparation method thereof, wherein the high-contrast full-color reflective polarizer sequentially comprises the following components: the protective film, HCMR TAC, PVA film, TAC film, 1/2 inlet plate, 1/4 inlet plate and release film; the diffusion glue between the 1/4 inlet plate and the release film, the PSA glue between the 1/2 inlet plate and the 1/4 inlet plate and between the TAC and the 1/2 inlet plate are respectively arranged; the invention also provides a preparation method of the PSA glue. The high-contrast full-color reflective polarizer prepared by the invention has better performance, compared with the original product, has new breakthrough, and can be applied to the surface of the reflective LCD, thereby realizing full-color reflective effect and thoroughly changing the current situation that the original product can only be used on the LCD of the traditional IPS.
Description
Technical Field
The invention belongs to the technical field of reflective polarizers, and particularly relates to a high-contrast full-color reflective polarizer and a preparation method thereof.
Background
The polaroid is an indispensable material in the liquid crystal display industry, and the polaroid is required to be attached to the front and back sides of each liquid crystal display LCD glass panel. The polaroid is manufactured according to the polarization principle of light rays and has a special function of effectively eliminating glare. The current reflective polarizer has a simple layer structure, and the common full-view polarizer structure is shown in fig. 1, and can only be used on a traditional full-view LCD (liquid crystal display), and the purpose of the research is to provide a high-contrast full-color reflective polarizer which can be applied to the surface of the reflective LCD, so that the full-color reflective effect is realized.
Disclosure of Invention
The invention aims to provide a high-contrast full-color reflection polaroid and a preparation method thereof, and the prepared reflection polaroid has better polarization degree and contrast and can be applied to the surface of a reflective LCD (liquid crystal display) screen so as to realize the full-color reflection effect.
In order to achieve the above object, the present invention provides the following technical solutions:
A high-contrast full-color reflection polaroid sequentially comprises a protective film, HCMRTAC, a PVA film, a TAC film, a 1/2 plate, a 1/4 plate and a release film; and PSA glue is arranged between the 1/4 inlet plate and the release film, between the 1/2 inlet plate and the 1/4 inlet plate and between the TAC film and the 1/2 inlet plate.
Further, the preparation method of the PSA glue comprises the following steps: the weight portions of the components are calculated according to the weight portions,
(1) Uniformly mixing 20-30 parts of soft monomer, 15-25 parts of hard monomer, 4-6 parts of methacrylic acid and 1-1.2 parts of azodiisobutyronitrile to obtain preset liquid; wherein the soft monomer is prepared from the following components in percentage by weight: 1-2:0.3 to 0.8 of ethyl acrylate, butyl acrylate and isooctyl acrylate; the mass ratio of the hard monomer is 1:2-4:5-7, compounding methyl methacrylate, acrylonitrile and vinyl acetate;
(2) Mixing 50-60 parts of ethyl acetate and 1/5 of preset liquid, and reacting for 20-30min at 80 ℃ in a reactor;
(3) Mixing 1-2 parts of compound monomer, 100-120 parts of ethyl acetate and the rest of preset liquid uniformly, adding the mixture into a reactor, reacting for 2-3 hours at 80 ℃, cooling to 50-60 ℃, adding 3-5 parts of modified nano aluminum oxide, 1-2 parts of antistatic agent and 0.1-0.3 part of light stabilizer, and reacting for 20-25 minutes at a temperature of heat preservation to obtain the PSA glue.
Further, the compound monomer has a mass ratio of 1.5-2:0.2-0.6:5.3-7.6:1, an aromatic acrylate monomer, propoxylated trimethylolpropane triacrylate and beta-carboxyethyl acrylate.
Further, the preparation method of the aromatic acrylate monomer comprises the following steps: mixing hydroxyethyl acrylate, methyl tetrahydrophthalic anhydride and triethylamine catalyst, reacting for 4-5 hours at 90 ℃, continuously adding glycidyl methacrylate, reacting for 4-5 hours at 90 ℃, and drying to obtain the aromatic acrylate monomer.
Further, the molar ratio of the hydroxyethyl acrylate, the methyltetrahydrophthalic anhydride, the glycidyl methacrylate and the triethylamine is 1:1:1:0.2.
The inventor finds that with the increase of the polarizer film layer of the invention, the thickness of the PSA glue is 24 mu m respectively, and at the thickness, the adhesive force of the existing PSA glue cannot meet the requirement of the polarizer of the invention, and the adhesive force of the PSA glue cannot be kept relatively good for 1/2 plate entering, 1/4 plate entering and TAC film. The self-made PSA glue is used, so that the adhesive force is more suitable for the structure of the polaroid. The inventors have also unexpectedly found that when the specific compositions and ratios of the soft monomer, hard monomer, and formulated monomer of the present invention are used, the light transmittance of the PSA gel is also improved.
The preparation method of the modified nano aluminum oxide comprises the following steps: 3-4 parts by weight of gamma-glycidoxy trimethoxy silane is added into 150-200 parts by weight of dimethylbenzene to react for 1.5-2.5 hours at the temperature of 30-35 ℃, 100 parts by weight of nano aluminum oxide is continuously added, stirring reaction is carried out for 5-6 hours at the temperature of 80-85 ℃ under the condition, and the solvent is removed, so that the modified nano aluminum oxide is obtained.
The grain diameter of the nano aluminum oxide is 1-10 mu m, and the specific surface area is 340m 2/g. Purchased from Zhejiang Zhi Titania micro new material Co., ltd., 6N high purity alumina, ZT-L300N.
The self-made PSA glue can improve the viscosity of the PSA glue to three film layers, but the high temperature resistance of the PSA glue is not ideal. Through a large number of experiments, the temperature resistance of the PSA glue can be improved by adding the modified nano aluminum oxide, and the phenomenon that the surface of the PSA glue is uneven after being heated due to poor temperature resistance and the performance of the polaroid is influenced is avoided. The inventors have also unexpectedly found that by using specific parameters of nano-alumina, the tensile strength of the PSA glue is also improved.
The antistatic agent was purchased from the company of Murnisen (Nanjing) technology, inc., and was optically clear antistatic agent I I2110.
The light stabilizer is a mixture of bis (1, 2, 6-pentamethyl-4-piperidine) sebacate and 1- (methyl) -8- (1, 2, 6-pentamethyl-4-piperidine) sebacate, and is purchased from Hua Longde chemical industry Co., ltd, model number of Xinxiang city: light stabilizer 292.
Further, the thickness of the PSA glue between the TAC film and the 1/2 inlet plate, between the 1/2 inlet plate and the 1/4 inlet plate, respectively, was 24. Mu.m.
Further, the thickness of the diffusion adhesive is 26 μm, and the diffusion adhesive is cured in an oven at 55 ℃ for 45 minutes after being adhered to the release film.
Further, HCMRTAC had a thickness of 80 μm, the PVA film had a thickness of 15 μm, the TAC film had a thickness of 80 μm, the 1/2 inlet plate had a thickness of 43 μm, and the 1/4 inlet plate had a thickness of 43 μm.
The HCMRTAC material is TAC, the high temperature and high humidity resistance and high light transmittance of COP (cycloolefin polymer film) can increase the environmental stability and optical light transmittance of the material, the PVA material plays a role in polarized light and high light transmittance, and the chemical property of the TAC is stable, so that the PVA layer with unstable chemical property can be effectively protected.
Further, the PVA stretching axis is 14.8 degrees; ro=267 nm,28.7 degrees for 1/2 plate in; ro=107 nm,90.9 degrees for 1/4 plate in.
Compared with the prior art, the invention has the advantages that: the PVA stretching axis of the reflective polarizer prepared by the invention needs to meet 14.8 degrees, 1/2 plate entering needs RO=267 NM,28.7 degrees, 1/4 plate entering needs RO=107 nm,90.9 degrees, the angles of the three belong to specific angles, the original product can only be used on the LCD of the traditional IPS, and the high-contrast full-color reflective polarizer can be applied on the surface of the reflective LCD, so that the full-color reflective effect is realized.
Drawings
FIG. 1 is a schematic diagram of a common full view polarizer;
FIG. 2 is a schematic diagram of a high contrast total color reflective polarizer according to the present invention.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. 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.
Example 1
The embodiment provides a high-contrast full-color reflective polarizer, which sequentially comprises a protective film, HCMRTAC, a PVA film, a TAC film, a 1/2 plate, a 1/4 plate and a release film; and PSA glue is arranged between the 1/4 inlet plate and the release film, between the 1/2 inlet plate and the 1/4 inlet plate and between the TAC film and the 1/2 inlet plate.
The preparation method of the PSA glue comprises the following steps: the weight portions of the components are calculated according to the weight portions,
(1) Uniformly mixing 26 parts of soft monomer, 21 parts of hard monomer, 5 parts of methacrylic acid and 1.1 parts of azodiisobutyronitrile to obtain preset liquid; wherein the soft monomer is prepared from the following components in percentage by weight: 1.5: ethyl acrylate, butyl acrylate, and isooctyl acrylate of 0.5; the mass ratio of the hard monomer is 1:3:6, compounding methyl methacrylate, acrylonitrile and vinyl acetate;
(2) 54 parts of ethyl acetate and 1/5 of preset liquid are mixed and reacted for 25 minutes at 80 ℃ in a reactor;
(3) And (3) uniformly mixing 2 parts of compound monomer, 110 parts of ethyl acetate and the rest preset liquid, adding the mixture into a reactor, reacting for 2.5 hours at 80 ℃, cooling to 55 ℃, adding 4 parts of modified nano aluminum oxide, 1.5 parts of antistatic agent and 0.2 part of light stabilizer, and reacting for 25 minutes at the temperature of the mixture to obtain the PSA glue.
The mass ratio of the compound monomer is 1.7:0.4:6:1, an aromatic acrylate monomer, propoxylated trimethylolpropane triacrylate and beta-carboxyethyl acrylate.
The preparation method of the aromatic acrylate monomer comprises the following steps: mixing hydroxyethyl acrylate, methyl tetrahydrophthalic anhydride and a triethylamine catalyst, reacting for 4.5 hours at 90 ℃, continuously adding glycidyl methacrylate, reacting for 4.5 hours at 90 ℃, and drying to obtain the aromatic acrylate monomer.
The molar ratio of the hydroxyethyl acrylate to the methyltetrahydrophthalic anhydride to the glycidyl methacrylate to the triethylamine is 1:1:1:0.2.
The preparation method of the modified nano aluminum oxide comprises the following steps: adding 3.5 parts by weight of gamma-glycidoxy trimethoxy silane into 160 parts by weight of dimethylbenzene to react for 2 hours at the temperature of 33 ℃, continuously adding 100 parts by weight of nano aluminum oxide, stirring and reacting for 5.5 hours at the temperature of 82 ℃ and removing the solvent to obtain the modified nano aluminum oxide.
The grain diameter of the nano aluminum oxide is 1-10 mu m, and the specific surface area is 340m 2/g. Purchased from Zhejiang Zhi Titania micro new material Co., ltd., 6N high purity alumina, ZT-L300N.
The antistatic agent was purchased from the company of Murnisen (Nanjing) technology, inc., and was optically clear antistatic agent I I2110.
The light stabilizer is a mixture of bis (1, 2, 6-pentamethyl-4-piperidine) sebacate and 1- (methyl) -8- (1, 2, 6-pentamethyl-4-piperidine) sebacate, and is purchased from Hua Longde chemical industry Co., ltd, model number of Xinxiang city: light stabilizer 292.
The thickness of the PSA glue between the TAC film and the 1/2 inlet plate, between the 1/2 inlet plate and the 1/4 inlet plate, respectively, was 24. Mu.m. The thickness of the diffusion adhesive is 26 mu m, and the diffusion adhesive is solidified in an oven at 55 ℃ for 45 minutes after being adhered to the release film. HCMRTAC have a thickness of 80 μm, the PVA film has a thickness of 15 μm, the TAC film has a thickness of 80 μm, the 1/2 inlet plate has a thickness of 43 μm, and the 1/4 inlet plate has a thickness of 43 μm.
The PVA stretching axis is 14.8 degrees; ro=267 nm,28.7 degrees for 1/2 plate in; ro=107 nm,90.9 degrees for 1/4 plate in.
Example 2
The differences between this embodiment and embodiment 1 are: the preparation method of the PSA glue comprises the following steps: the weight portions of the components are calculated according to the weight portions,
(1) Uniformly mixing 20 parts of soft monomer, 25 parts of hard monomer, 6 parts of methacrylic acid and1 part of azodiisobutyronitrile by weight to obtain preset liquid; wherein the soft monomer is prepared from the following components in percentage by weight: 2: ethyl acrylate, butyl acrylate, and isooctyl acrylate of 0.3; the mass ratio of the hard monomer is 1:4:5, compounding methyl methacrylate, acrylonitrile and vinyl acetate;
(2) 50 parts of ethyl acetate and 1/5 of preset liquid are mixed and reacted for 30min at 80 ℃ in a reactor;
(3) And (3) uniformly mixing 2 parts of compound monomer, 100 parts of ethyl acetate and the rest preset liquid, adding the mixture into a reactor, reacting for 2 hours at 80 ℃, cooling to 50 ℃, adding 5 parts of modified nano aluminum oxide, 2 parts of antistatic agent and 0.1 part of light stabilizer, and reacting for 25 minutes at a temperature of keeping the temperature to obtain the PSA glue.
The mass ratio of the compound monomer is 1.5:0.6:5.3:1, an aromatic acrylate monomer, propoxylated trimethylolpropane triacrylate and beta-carboxyethyl acrylate.
Comparative example 1
The difference between this comparative example and example 1 is: the preparation method of the PSA glue comprises the following steps: the weight portions of the components are calculated according to the weight portions,
(1) Uniformly mixing 40 parts of soft monomer, 10 parts of hard monomer, 8 parts of methacrylic acid and 3 parts of azodiisobutyronitrile to obtain preset liquid; wherein the soft monomer is prepared from the following components in percentage by weight: 1: ethyl acrylate, butyl acrylate and isooctyl acrylate of 1; the mass ratio of the hard monomer is 1:1:1, compounding methyl methacrylate, acrylonitrile and vinyl acetate;
(2) 45 parts of ethyl acetate and 1/5 of preset liquid are mixed and reacted for 20min at 80 ℃ in a reactor;
(3) And (3) uniformly mixing 4 parts of compound monomer, 120 parts of ethyl acetate and the rest preset liquid, adding the mixture into a reactor, reacting for 2 hours at 80 ℃, cooling to 50 ℃, adding 2 parts of modified nano aluminum oxide, 3 parts of antistatic agent and 0.5 part of light stabilizer, and reacting for 22 minutes at a temperature of keeping the temperature to obtain the PSA glue.
Comparative example 2
The difference between this comparative example and example 1 is: the preparation method of the PSA glue comprises the following steps: the weight portions of the components are calculated according to the weight portions,
(1) Uniformly mixing 15 parts of soft monomer, 35 parts of hard monomer, 3 parts of methacrylic acid and 3 parts of azodiisobutyronitrile to obtain preset liquid; wherein the soft monomer is prepared from the following components in percentage by weight: 1: ethyl acrylate, butyl acrylate and isooctyl acrylate of 1; the mass ratio of the hard monomer is 1:1:1, compounding methyl methacrylate, acrylonitrile and vinyl acetate;
(2) 45 parts of ethyl acetate and 1/5 of preset liquid are mixed and reacted for 20min at 80 ℃ in a reactor;
(3) And (3) uniformly mixing 4 parts of compound monomer, 120 parts of ethyl acetate and the rest preset liquid, adding the mixture into a reactor, reacting for 2 hours at 80 ℃, cooling to 50 ℃, adding 2 parts of modified nano aluminum oxide, 3 parts of antistatic agent and 0.5 part of light stabilizer, and reacting for 22 minutes at a temperature of keeping the temperature to obtain the PSA glue.
Comparative example 3
The difference between this comparative example and example 1 is: the soft monomer is prepared from the following components in percentage by weight: ethyl acrylate and isooctyl acrylate of 1; the mass ratio of the hard monomer is 1:1, compounding methyl methacrylate and vinyl acetate; the compound monomer is prepared from the following components in percentage by mass: 1:1:1, glycidyl methacrylate, propoxylated trimethylolpropane triacrylate and tetrahydrofurane acrylate.
Comparative example 4
The difference between this comparative example and example 1 is: the soft monomer is prepared from the following components in percentage by weight: 1: ethyl acrylate, butyl acrylate and isooctyl acrylate of 1; the mass ratio of the hard monomer is 1:1:1, compounding methyl methacrylate, acrylonitrile and vinyl acetate; the compound monomer is prepared from the following components in percentage by mass: 1:1:1, an aromatic acrylate monomer, propoxylated trimethylolpropane triacrylate and beta-carboxyethyl acrylate.
Comparative example 5
The difference between this comparative example and example 1 is: the modified nano aluminum oxide is replaced by: modified talcum powder. The preparation method of the modified talcum powder comprises the following steps: mixing 0.2 parts of polyacrylic acid and 0.4 part of isopropanol according to parts by weight to obtain a mixture; (2) 100 parts of talcum powder is put into a high-speed mixer, the mixture is sprayed on the talcum powder while stirring, the spraying pressure is 0.5MPa, and the spraying flow is 1.0L/min; (3) After spraying, the mixture is transferred into a collision type jet mill, and depolymerized for 30min at 115 ℃ under the air pressure of 1.5MPa, so as to obtain the modified talcum powder. The particle size of the talcum powder is 80-100 meshes.
Comparative example 6
The difference between this comparative example and example 1 is: the grain diameter of the nano aluminum oxide is 20-30 mu m, and the specific surface area is 157m 2/g. Purchased from Zhejiang Zhi Tina micro new materials Co.
Comparative example 7
The comparative example was a commercially available pressure-sensitive adhesive LC-640 for optical films for polarizers of liquid crystal displays, sanxin chemical (Shanghai) Co., ltd.
Performance testing
1. Referring to GB13022-91, the samples are type I, 6.25mm wide, the sample reticle pitch is 25m, the stretching speed is 50mm/min, and the tensile strength of the PSA glue of the examples and comparative examples is determined;
2. initial adhesive properties:
(1) The PSA glue of examples and comparative examples was applied to a 1/4 inlet plate, and the test pieces were each attached to a 1/2 inlet plate as an adherend by 2-pass reciprocation with a 2kg roller, cut into 25mm wide pieces, and the resulting materials were used as test pieces, and after 1 hour of attachment, 180-degree peel strength 1 was measured under an atmosphere of 23 ℃ and 50% rh.
(2) The PSA glue of examples and comparative examples was applied to a 1/2 inlet plate, the test pieces were each attached to a TAC film as an adherend by 2-roll-times reciprocation at 2kg, cut into 25mm wide pieces, and the resulting materials were used as test pieces, and after 1 hour of attachment, 180-degree peel strength 2 was measured under an atmosphere of 23 ℃ and 50% rh.
3. The PSA adhesives of examples and comparative examples were left at 100 ℃ for 6 hours, cooled to room temperature, and then tested for high temperature post-adhesive properties using the initial adhesive property (1) test method. The results are shown in Table 1.
4. The light transmittance of the PSA gums of the examples and comparative examples was measured using a haze meter with reference to standard GB/T2410-2008. The results are shown in Table 1.
TABLE 1 Performance test results
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The high-contrast full-color reflection polaroid is characterized by sequentially comprising a protective film, HCMRTAC, a PVA film, a TAC film, a 1/2 plate, a 1/4 plate and a release film; the diffusion glue between the 1/4 inlet plate and the release film, the PSA glue between the 1/2 inlet plate and the 1/4 inlet plate and between the TAC and the 1/2 inlet plate are respectively arranged;
the preparation method of the PSA glue comprises the following steps: the weight portions of the components are calculated according to the weight portions,
(1) Uniformly mixing 20-30 parts of soft monomer, 15-25 parts of hard monomer, 4-6 parts of methacrylic acid and 1-1.2 parts of azodiisobutyronitrile to obtain preset liquid; wherein the soft monomer is prepared from the following components in percentage by weight: 1-2:0.3 to 0.8 of ethyl acrylate, butyl acrylate and isooctyl acrylate; the mass ratio of the hard monomer is 1:2-4:5-7, compounding methyl methacrylate, acrylonitrile and vinyl acetate;
(2) Mixing 50-60 parts of ethyl acetate and 1/5 of preset liquid, and reacting for 20-30min at 80 ℃ in a reactor;
(3) Mixing 1-2 parts of compound monomer, 100-120 parts of ethyl acetate and the rest of preset liquid uniformly, adding the mixture into a reactor, reacting for 2-3 hours at 80 ℃, cooling to 50-60 ℃, adding 3-5 parts of modified nano aluminum oxide, 1-2 parts of antistatic agent and 0.1-0.3 part of light stabilizer, and reacting for 20-25 minutes at a temperature of heat preservation to obtain the PSA glue.
2. The high-contrast full-color reflective polarizer according to claim 1, wherein the compound monomer is in a mass ratio of 1.5-2:0.2-0.6:5.3-7.6:1, an aromatic acrylate monomer, propoxylated trimethylolpropane triacrylate and beta-carboxyethyl acrylate.
3. The high-contrast full-color reflective polarizer according to claim 2, wherein the aromatic acrylate monomer is prepared by the following steps: mixing hydroxyethyl acrylate, methyl tetrahydrophthalic anhydride and triethylamine catalyst, reacting for 4-5 hours at 90 ℃, continuously adding glycidyl methacrylate, reacting for 4-5 hours at 90 ℃, and drying to obtain the aromatic acrylate monomer.
4. A high contrast total color reflective polarizer according to claim 3, wherein the molar ratio of hydroxyethyl acrylate, methyltetrahydrophthalic anhydride, glycidyl methacrylate and triethylamine is 1:1:1:0.2.
5. The high-contrast full-color reflective polarizer according to claim 1, wherein the modified nano aluminum oxide is prepared by the following steps: 3-4 parts by weight of gamma-glycidoxy trimethoxy silane is added into 150-200 parts by weight of dimethylbenzene to react for 1.5-2.5 hours at the temperature of 30-35 ℃, 100 parts by weight of nano aluminum oxide is continuously added, stirring reaction is carried out for 5-6 hours at the temperature of 80-85 ℃ under the condition, and the solvent is removed, so that the modified nano aluminum oxide is obtained.
6. The high contrast total color reflective polarizer according to claim 5, wherein the nano aluminum oxide has a particle size of 1-10 μm and a specific surface area of 340m 2/g.
7. The high contrast full color reflective polarizer according to claim 1, wherein the PSA glue thickness between the TAC film and the 1/2 entrance plate, 1/2 entrance plate and 1/4 entrance plate is 24 μm, respectively.
8. The high contrast full color reflective polarizer according to claim 1, wherein the thickness of the diffusion paste is 26 μm, and the diffusion paste is cured for 45 minutes at an oven temperature of 55 ℃ after being attached to the release film.
9. The high contrast full color reflective polarizer according to claim 1, wherein HCMRTAC has a thickness of 80 μm, the PVA film has a thickness of 15 μm, the TAC film has a thickness of 80 μm, the 1/2 plate-in thickness is 43 μm, and the 1/4 plate-in thickness is 43 μm.
10. The method for preparing a high-contrast full-color reflective polarizer according to any one of claims 1 to 9, wherein the protective film, HCMRTAC, PVA film, TAC film, 1/2 plate, 1/4 plate and release film are bonded together according to the structure of the high-contrast full-color reflective polarizer.
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