CN113791469B - Ultraviolet-proof polarizer, preparation method and application thereof - Google Patents
Ultraviolet-proof polarizer, preparation method and application thereof Download PDFInfo
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- CN113791469B CN113791469B CN202110974936.4A CN202110974936A CN113791469B CN 113791469 B CN113791469 B CN 113791469B CN 202110974936 A CN202110974936 A CN 202110974936A CN 113791469 B CN113791469 B CN 113791469B
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/868—Arrangements for polarized light emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Polarising Elements (AREA)
Abstract
The application relates to the technical field of display devices, and provides an anti-ultraviolet polarizer, which comprises a polarizing plate; a first adhesive layer adhered to a surface of the polarizing plate; the optical compensation layer is combined with the first bonding layer at a surface which faces away from the polarizing plate; a second adhesive layer bonded to the optical compensation layer and facing away from the surface of the first adhesive layer; wherein the first adhesive layer comprises a first ultraviolet absorber and the second adhesive layer comprises a second ultraviolet absorber. The two layers of the adhesive layers respectively comprising different ultraviolet absorbers have the function of superposition absorption, so that the absorption of ultraviolet wave bands can be further improved, the obtained polaroid has stronger ultraviolet interception capability, and the service life of the polaroid is prolonged.
Description
Technical Field
The application belongs to the technical field of display devices, and particularly relates to an ultraviolet-proof polarizer, a preparation method and application thereof.
Background
Polarizer is one of the indispensable components in most display devices, and is widely applied in the display field, while in recent years, OLED display screens are the development trend of the display industry, and OLED displays have the advantages of light weight, thinness, wide viewing angle, high contrast ratio and the like, and have wide application in future display markets.
The existing common display polaroid has single function, and various polaroids do not provide a technical means for preventing ultraviolet rays; some polaroids with anti-ultraviolet function have certain defects: for example, a single film layer or an adhesive layer can not completely prevent ultraviolet rays from transmitting, and the rest of ultraviolet rays still have certain damage to display components after penetrating through the polaroid; in addition, the thickness of the polaroid and the material cost are increased by additionally arranging a coating or externally attaching a protective film, and the polaroid has complex procedures, complex structure and adverse operation.
Therefore, in the display module, many fine components are easily irradiated by ultraviolet from the environment to shorten the service life, and the service life of the display screen is influenced by the fact that the probability of the display screen becoming a waste screen is greatly increased due to the fact that the display screen is disabled.
Disclosure of Invention
The application aims to provide an anti-ultraviolet polarizer, a preparation method and application thereof, and aims to solve the problem that the polarizer provided in the prior art is easy to be influenced by ultraviolet rays and has short service life.
In order to achieve the purposes of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides an anti-uv polarizer, the polarizer comprising:
A polarizing plate;
A first adhesive layer adhered to the surface of the polarizing plate;
The optical compensation layer is laminated and combined on the surface of the first bonding layer, which is away from the polarizing plate;
A second adhesive layer adhered to the optical compensation layer and facing away from the surface of the first adhesive layer;
wherein the first adhesive layer comprises a first ultraviolet absorber and the second adhesive layer comprises a second ultraviolet absorber.
In a second aspect, the present application provides a method for preparing an anti-uv polarizer, comprising the steps of:
Providing a polarizing plate;
a first adhesive layer is adhered on the surface of any side of the polarizing plate,
An optical compensation layer is arranged on the surface of the first bonding layer, which is away from the polarizing plate,
A second bonding layer is bonded on the surface of the optical compensation layer, which is away from the first bonding layer, so as to obtain a composite layer structure;
and (3) curing the composite layer structure to obtain the ultraviolet-proof polaroid.
In a third aspect, the application provides a display device, which comprises a display screen and a polaroid attached to any surface of the display screen, wherein the polaroid is an anti-ultraviolet polaroid or is prepared by a preparation method of the anti-ultraviolet polaroid.
The ultraviolet-proof polarizer provided by the first aspect of the application comprises a polarizing plate, a first bonding layer, an optical compensation layer and a second bonding layer, wherein the first bonding layer comprises a first ultraviolet absorber, and the second bonding layer comprises a second ultraviolet absorber. Wherein, the polaroid interval sets up two-layer tie coat, and two-layer tie coat has included different ultraviolet absorbent respectively, on the one hand, make two-layer tie coat all have the effect of preventing ultraviolet transmission, and owing to add different ultraviolet absorbent respectively, can ensure to enlarge the absorption effect to the ultraviolet band, guarantee to absorb the ultraviolet band as wide as possible, on the other hand, two-layer tie coat that includes different ultraviolet absorbent respectively has superimposed absorbing effect, can further improve the absorption to the ultraviolet band, make the polaroid that obtains have stronger ultraviolet interception ability, improved the life of polaroid.
According to the preparation method of the ultraviolet-resistant polaroid, provided by the second aspect of the application, each layer of structure is sequentially arranged on the surface of the polarizing plate, and the polaroid can be obtained by curing treatment, and the obtained polaroid is provided with two layers of bonding layers respectively comprising different ultraviolet absorbers, so that the ultraviolet-resistant polaroid can absorb as wide ultraviolet bands as possible, has the function of superposition absorption, has strong ultraviolet light interception capability, is simple in preparation process, does not need to use large instruments and equipment, is simple and easy to operate, and is beneficial to wide application.
According to the display device provided by the third aspect of the application, the display device comprises the display screen and the polaroid attached to any surface of the display screen, and the provided polaroid can be superposed and absorbed as wide ultraviolet band as possible, so that the obtained display device is not easy to be influenced by ultraviolet rays, and the service life of the display device is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an anti-UV polarizer according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an optical compensation layer according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an anti-UV polarizer (including an encapsulation film) according to an embodiment of the present application;
FIG. 4 is a graph showing an analysis of performance test of an anti-UV polarizer according to an embodiment of the present application.
Wherein, each reference sign in the figure:
1-polarizing plate, 2-first adhesive layer, 3-optical compensation layer, 4-second adhesive layer and 5-packaging film layer; 301-first optical compensation film, 302-water glue layer, 303-second optical compensation film.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the present application, the term "and/or" describes an association relationship of an association object, which means that three relationships may exist, for example, a and/or B may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.
It should be understood that, in various embodiments of the present application, the sequence number of each process described above does not mean that the execution sequence of some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weights of the relevant components mentioned in the description of the embodiments of the present application may refer not only to the specific contents of the components, but also to the proportional relationship between the weights of the components, so long as the contents of the relevant components in the description of the embodiments of the present application are scaled up or down within the scope of the disclosure of the embodiments of the present application. Specifically, the mass in the specification of the embodiment of the application can be a mass unit which is known in the chemical industry field such as mu g, mg, g, kg.
The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated for distinguishing between objects such as substances from each other. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In a first aspect, an embodiment of the present application provides an anti-ultraviolet polarizer, as shown in fig. 1, the polarizer includes:
A polarizing plate 1;
a first adhesive layer 2, the first adhesive layer 2 being adhered to the surface of the polarizing plate 1;
An optical compensation layer 3, wherein the optical compensation layer 3 is laminated and combined on the surface of the first adhesive layer 2, which is away from the polarizing plate 1;
A second adhesive layer 4, the second adhesive layer 4 being adhered to the optical compensation layer 3 and facing away from the surface of the first adhesive layer 2;
wherein the first adhesive layer comprises a first ultraviolet absorber and the second adhesive layer comprises a second ultraviolet absorber.
The ultraviolet-proof polarizer provided by the first aspect of the application comprises a polarizing plate 1, a first bonding layer 2, an optical compensation layer 3 and a second bonding layer 4, wherein the first bonding layer 2 comprises a first ultraviolet absorber, and the second bonding layer 4 comprises a second ultraviolet absorber. Wherein, the interval sets up two-layer tie coat, and two-layer tie coat has included different ultraviolet absorbent respectively, on the one hand, make two-layer tie coat all have the effect of preventing ultraviolet transmission, and owing to add different ultraviolet absorbent respectively, can ensure to enlarge the absorption effect to the ultraviolet band, guarantee to absorb the ultraviolet band as wide as possible, on the other hand, two-layer tie coat that includes different ultraviolet absorbent respectively has the effect of stack absorption, can further improve the absorption to the ultraviolet band, make the polaroid that obtains have stronger ultraviolet interception ability, improved the life of polaroid.
Specifically, the polarizer includes a polarizing plate 1, and the polarizing plate 1 is provided to transmit light through the polarizing plate 1 to form polarized light.
In some embodiments, the polarizer 1 is selected from a double layer composite polarizer 1 structure or a triple layer composite polarizer 1 structure. The double-layer composite polarizing plate 1 comprises a polyvinyl alcohol film and a laminated cellulose triacetate film. The provided polyvinyl alcohol film can ensure that a polarizing effect can be achieved, and the surface of the polarizing plate 1 deviating from the first adhesive layer can be guaranteed to be the cellulose triacetate film by arranging the cellulose triacetate film, so that the polyvinyl alcohol film is protected.
In some embodiments, the three-layer composite polarizing plate 1 is in a sandwich structure, including a cellulose triacetate film-a polyvinyl alcohol film-a cellulose triacetate film, and the polyvinyl alcohol films are provided to ensure that the polarizing effect can be achieved, and the cellulose triacetate films are arranged on the polyvinyl alcohol films to protect the polyvinyl alcohol films, so that the polyvinyl alcohol films are ensured not to be affected by moisture absorption.
In some embodiments, the thickness of the polarizer is 63-66 microns, ensuring that the resulting polarizer is moderately thick, facilitating the placement of other layer structures.
Specifically, the polarizer includes a first adhesive layer 2, and the first adhesive layer 2 is adhered to the surface of the polarizing plate 1.
In some embodiments, the first adhesive layer has a thickness of 5 to 7 microns. The first bonding layer is provided with moderate thickness, which is beneficial to absorbing ultraviolet light.
In some embodiments, the first tie layer 2 comprises the following components in parts by weight:
Wherein the solid content of the first acrylic resin is 17-17.8%; the solid content of the first acrylic resin cross-linking agent is 35-55%.
The first bonding layer 2 takes the first acrylic resin as a main component, and ethyl acetate, a first acrylic resin cross-linking agent, a silane coupling agent and a first ultraviolet absorber are cooperatively added for compound use, so that the obtained first bonding layer 2 can better play a role in absorbing ultraviolet light on one hand, has a certain bonding effect on the other hand, and can better bond with different layer structure materials to form a whole.
In some embodiments, the acrylic monomer of the first acrylic resin is selected from at least one of methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, t-butyl methacrylate, cyclohexyl methacrylate. And the solid content of the first acrylic resin is controlled to be 17% -17.8%, and the fluidity of the first bonding layer 2 can be further improved by controlling the solid content of the first acrylic resin to be lower, so that the coating is facilitated.
In some embodiments, the first acrylic cross-linking agent has a solids content of 35% to 55%; wherein the first acrylic resin crosslinking agent is at least one selected from melamine-formaldehyde crosslinking agents, aziridine crosslinking agents and polycarbodiimide crosslinking agents.
In some embodiments, the first ultraviolet absorber is selected from at least one of benzotriazole compounds, salicylate compounds, benzophenone compounds, substituted acrylonitrile compounds, triazine compounds, hindered amine compounds. Since the first adhesive layer 2 includes the first ultraviolet absorber, absorption of ultraviolet light wave bands can be improved. The provided ultraviolet absorbent has higher compatibility with acrylic resin and excellent heat resistance and light stability, and can be used advantageously.
In a specific embodiment, the first ultraviolet absorbing aid is selected from the group consisting of benzotriazoles.
In some embodiments, the ultraviolet absorption peak of the first ultraviolet absorption auxiliary agent is 290nm to 400nm, and the ultraviolet absorption peak of the first ultraviolet absorption auxiliary agent is further determined to be 290nm to 400nm according to the type of the first ultraviolet absorbent, so that the first adhesive layer 2 can completely absorb the ultraviolet light with the ultraviolet absorption peak of 290nm to 400 nm.
In some embodiments, the first ultraviolet absorbing aid has an ultraviolet absorption peak with a strong absorption peak of 300nm to 380nm.
Specifically, the polarizer includes a second adhesive layer 4, and the second adhesive layer 4 is adhered to the optical compensation layer 3 and faces away from the surface of the first adhesive layer 2.
The two layers of bonding layers are arranged at intervals of the polaroid and respectively comprise different ultraviolet absorbers, on one hand, the two layers of bonding layers are enabled to have ultraviolet transmission preventing effects, and on the other hand, the two layers of bonding layers respectively comprise different ultraviolet absorbers, and can further improve the absorption of the ultraviolet light wave bands, so that the obtained polaroid has stronger ultraviolet light interception capability and the service life of the polaroid is prolonged.
In some embodiments, the thickness of the second adhesive layer is 15-17 micrometers, and the thickness of the second adhesive layer is thicker than that of the first adhesive layer, so that superposition absorption is facilitated, and meanwhile, ultraviolet light which is not absorbed by the first adhesive layer can be completely absorbed, and absorption efficiency is improved. In some embodiments, the second adhesive layer 4 comprises the following components in parts by weight:
wherein the solid content of the second acrylic resin is 21.6-22%, and the solid content of the second acrylic resin cross-linking agent is 50-65%.
The second bonding layer 4 uses second acrylic resin as a main component, and ethyl acetate, a second acrylic resin cross-linking agent and a second ultraviolet absorber are cooperatively added for compound use, so that the obtained second bonding layer 4 can be overlapped with the first bonding layer 2 for use on one hand, has a good effect of absorbing ultraviolet light, has a certain bonding effect on the other hand, and can be bonded with an OLED screen.
In some embodiments, the second acrylic resin is selected from at least one of benzyl methacrylate, methoxyethyl methacrylate, ethoxyethyl methacrylate, butoxymethyl methacrylate, hydroxyethyl methacrylate, and oligomers thereof. And the solid content of the second acrylic resin is controlled to be 21.6% -22%, so that the bonding with the display screen of the OLED device is facilitated.
In some embodiments, the second ultraviolet absorber is selected from at least one of benzotriazole compounds, salicylate compounds, benzophenone compounds, substituted acrylonitrile compounds, triazine compounds, hindered amine compounds. Since the second adhesive layer 4 includes the second ultraviolet absorber, absorption of ultraviolet light wave bands can be improved. The provided ultraviolet absorbent has higher compatibility with acrylic resin and excellent heat resistance and light stability, and can be used advantageously.
In some embodiments, the second ultraviolet absorbing aid has an ultraviolet absorption peak of 240nm to 340nm. According to the type of the second ultraviolet absorbent, the ultraviolet absorption peak of the second ultraviolet absorption auxiliary agent is further determined to be 240-340 nm, so that the second adhesive layer 4 can completely absorb the ultraviolet light with the ultraviolet absorption peak of 240-340 nm. In some embodiments, the second ultraviolet absorbing aid has an ultraviolet absorption peak with a strong absorption peak of 260nm to 310nm. By superposing the first bonding layer and the second bonding layer, the ultraviolet light with the wavelength range of 240-400 nm can be absorbed, the certain superposition absorption effect is ensured, the obtained polaroid has strong ultraviolet light interception capability, and the service life of the polaroid is prolonged.
In a specific embodiment, the second ultraviolet absorber is selected from the group consisting of 3:1, providing the mixture of the 2-hydroxy-4-octoxybenzophenone and the hindered amine compound as a second ultraviolet absorbent, and further superposing the mixture with a first ultraviolet absorbent of a benzotriazole compound to ensure that ultraviolet light in a wavelength range of 240-400 nm can be absorbed, so that the obtained polaroid has stronger ultraviolet light interception capability and the service life of the polaroid is prolonged.
Specifically, the polarizer comprises an optical compensation layer 3, and the optical compensation layer 3 is laminated and combined on the surface of the first adhesive layer 2, which is away from the polarizing plate 1; the optical compensation layer 3 is arranged between the first bonding layer 2 and the second bonding layer 4, and the optical compensation layer 3 is provided to compensate the transmitted light, so that the obtained light is ensured to be plump.
In some embodiments, the optical compensation layer has a thickness of 8-12 microns, providing an optical compensation layer of moderate thickness, which can facilitate light replenishment.
In some embodiments, as shown in fig. 2, along the direction from the first adhesive layer 2 to the second adhesive layer 4, the optical compensation layer 3 includes a first optical compensation film 301, a water adhesive layer 302, and a second optical compensation film 303 laminated in this order, where the first optical compensation film 301 is disposed in a manner of being adhered to the surface of the first adhesive layer 2, and the second optical compensation film 302 is disposed in a manner of being adhered to the surface of the second adhesive layer 2.
In some embodiments, the thickness of the first optical compensation film 301 and the second optical compensation film 303 is 4-6 microns.
In some embodiments, the materials of the first optical compensation film 301 and the second optical compensation film 303 are both selected from liquid crystal polymer film materials.
In some embodiments, the first optical compensation film 301 is selected from liquid crystal polymer films having compensation values of 255-265; the liquid crystal film can realize the function of a half wave plate, so that the polarization direction of transmitted light is perpendicular to the original polarization direction.
In some embodiments, the second optical compensation film 303 is selected from liquid crystal polymer films having compensation values of 116-122; the liquid crystal film can realize the function of a quarter wave plate, so that transmitted light is changed into elliptical polarized light.
The transmittance of the obtained integral polaroid is 40-44% by arranging two layers of optical compensation films, and the polarization degree is more than or equal to 99.8%. The optical compensation layer 3 is beneficial to compensating the transmitted light, so that the obtained light is ensured to be plump.
In some embodiments, the polarizer further includes an encapsulation film 5, as shown in fig. 3, and the encapsulation film 5 is laminated on the surface of the second adhesive layer 4 and facing away from the optical compensation layer 3, where the encapsulation film 5 is provided to protect each film, so that each film material is not affected by air and moisture.
In some embodiments, the encapsulation film layer 5 is selected from a release film. The release film can protect each film layer, so that each film layer material cannot be influenced by air and water vapor. And in the process of attaching the polaroid to the OLED display screen, tearing off the release film, and laminating the second bonding layer and the OLED display screen in a contact mode.
The second aspect of the embodiment of the application provides a method for preparing an anti-ultraviolet polarizer, which comprises the following steps:
s01, providing a polarizing plate 1;
S02, attaching a first bonding layer 2 on any side surface of the polarizing plate 1,
S03, an optical compensation layer 3 is attached to the surface of the first bonding layer 2, which is away from the polarizing plate 1,
S04, laminating a second bonding layer 4 on the surface of the optical compensation layer 3, which is away from the first bonding layer 2, so as to obtain a composite layer structure;
S05, curing the composite layer structure to obtain the ultraviolet-proof polaroid.
According to the preparation method of the ultraviolet-resistant polaroid, provided by the second aspect of the application, each layer of structure is sequentially arranged on the surface of the polarizing plate 1, and the polaroid can be obtained by curing treatment, and the obtained polaroid is provided with two layers of bonding layers respectively comprising different ultraviolet absorbers, so that the ultraviolet-resistant polaroid can absorb ultraviolet bands as wide as possible, has the function of superposition absorption, has strong ultraviolet light interception capability, is simple in preparation process, does not need to use large instruments and equipment, is simple and easy to operate, and is beneficial to wide application.
In step S01, a polarizing plate 1 is provided, the polarizing plate 1 provided is selected from a double-layer composite polarizing plate 1 structure or a three-layer composite polarizing plate 1 structure.
In step S02, the first adhesive layer 2 is provided on one of the surfaces of the polarizing plate 1.
In some embodiments, the method of preparing the first adhesive layer 2 includes the steps of:
S021. providing a first acrylic resin, ethyl acetate, a first acrylic resin cross-linking agent, a silane coupling agent and a first ultraviolet absorber according to the formulation of the first adhesive layer 2;
s022, uniformly mixing the components to obtain the mixed material of the first adhesive layer 2.
In some embodiments, the first adhesive layer 2 is coated on the surface of any side of the polarizing plate 1 in a mixed manner to form the first adhesive layer 2; wherein, the adhesive force between the first adhesive layer 2 and the surface of the polarizing plate 1 is 200-400gf/25mm, which ensures firm adhesion.
In step S03, an optical compensation layer 3 is attached to the surface of the first adhesive layer 2 facing away from the polarizing plate 1.
In some embodiments, the optical compensation layer 3 includes a first optical compensation film 301, a water gel 302, and a second optical compensation film laminated in this order.
In some embodiments, the method of preparing the optical compensation layer 3 includes the steps of:
S031, coating a water gel 302 layer on any side of the first optical compensation film 301;
And S032, laminating a second optical compensation film on the surface of the water gel 302 layer, which is away from the first optical compensation film 301, so as to obtain an optical compensation layer 3.
In some embodiments, the optical compensation layer 3 is disposed on the surface of the first adhesive layer 2 facing away from the polarizing plate 1, where the first optical compensation film 301 is disposed on the surface of the first adhesive layer 2.
In step S04, a second adhesive layer 4 is attached to the surface of the optical compensation layer 3 facing away from the first adhesive layer 2, so as to obtain a composite layer structure.
In some embodiments, the method of preparing the second adhesive layer 4 includes the steps of:
S041. providing a second acrylic resin, ethyl acetate, a second acrylic resin cross-linker and a second uv absorber according to the formulation of the second adhesive layer 4;
s042, uniformly mixing the components to obtain the second adhesive layer 4 mixture.
In some embodiments, the second adhesive layer 4 is applied by mixing the second adhesive layer 4 to the surface of the second optical compensation film in the optical compensation layer 3, forming the second adhesive layer 4.
In step S05, curing the composite layer structure to obtain the anti-ultraviolet polarizer.
In some embodiments, the composite layer structure is placed in an environment of 35-40 ℃ and 60RH% for curing for 120-140 hours, and then cut to obtain the ultraviolet-proof polarizer with a specific size.
In some embodiments, after the composite layer structure is cured, an encapsulation layer is attached to the surface of the second adhesive layer 4, which faces away from the optical compensation layer 3, and the 90-degree adhesive force between the attached encapsulation layer and the second adhesive layer 4 ranges from 220 gf/25mm, so that each film layer is ensured to be protected, and each film layer material is not influenced by air and moisture.
The third aspect of the embodiment of the application discloses a display device, which comprises a display screen and a polaroid attached to any surface of the display screen, wherein the polaroid is an ultraviolet-proof polaroid or is prepared by a preparation method of the ultraviolet-proof polaroid.
According to the display device provided by the third aspect of the application, the display device comprises the display screen and the polaroid attached to any surface of the display screen, and the provided polaroid can be superposed and absorbed as wide ultraviolet band as possible, so that the obtained display device is not easy to be influenced by ultraviolet rays, and the service life of the display device is prolonged.
In some embodiments, the display device includes, but is not limited to, an OLED display device, a QLED display device, an LED display device, and the like.
The following description is made with reference to specific embodiments.
Example 1
Ultraviolet-proof polarizer and preparation method thereof
(1) Ultraviolet-proof polarizer
The anti-ultraviolet polarizer includes:
A polarizing plate 1;
a first adhesive layer 2, the first adhesive layer 2 being adhered to the surface of the polarizing plate 1;
An optical compensation layer 3, wherein the optical compensation layer 3 is laminated and combined on the surface of the first adhesive layer 2, which is away from the polarizing plate 1;
A second adhesive layer 4, the second adhesive layer 4 being adhered to the optical compensation layer 3 and facing away from the surface of the first adhesive layer 2;
The polarizing plate 1 is selected from a double-layer composite polarizing plate 1 structure, wherein the double-layer composite polarizing plate 1 structure comprises a polyvinyl alcohol film and a laminated cellulose triacetate film; the thickness of the polarizing plate was 65 μm,
Along the direction from the first adhesive layer 2 to the second adhesive layer 4, the optical compensation layer 3 comprises a first optical compensation film 301, a water adhesive layer 302 and a second optical compensation film 303 which are laminated and combined in sequence, wherein the first optical compensation film 301 is adhered to the surface of the first adhesive layer 2, and the second optical compensation film 302 is adhered to the surface of the second adhesive layer 2; and the first optical compensation film is selected from liquid crystal polymer films with compensation values of 255-265 and has a thickness of 4 microns, and the second optical compensation film is selected from liquid crystal polymer films with compensation values of 116-122 and has a thickness of 4 microns; the thickness of the optical compensation layer is 9 micrometers;
the thickness of the first adhesive layer was 6 microns;
the thickness of the second adhesive layer was 16 microns;
the first adhesive layer 2 comprises the following components in parts by weight:
100 parts of a first acrylic resin;
30 parts of ethyl acetate;
0.5 part of a first acrylic resin cross-linking agent;
2 parts of silane coupling agent;
0.1 part of a first ultraviolet absorber; the first ultraviolet absorber is selected from benzotriazole compounds; controlling the ultraviolet absorption peak of the first ultraviolet absorption auxiliary agent to be 290-400 nm;
wherein the solid content of the first acrylic resin is 17% -17.8%.
The second adhesive layer 4 comprises the following components in parts by weight:
100 parts of a second acrylic resin;
35 parts of ethyl acetate;
1.6 parts of a second acrylic resin cross-linking agent;
0.3 part of a second ultraviolet absorber; the second ultraviolet absorber is selected from 2-hydroxy-4-octoxybenzophenone and hindered amine light stabilizer in a mass ratio of 3:1; controlling the ultraviolet absorption peak of the second ultraviolet absorption auxiliary agent to be 240-340 nm;
Wherein the solid content of the second acrylic resin is 21.6% -22%;
The optical compensation layer comprises a first adhesive layer 4, a second adhesive layer 4 and an optical compensation layer 3, wherein the optical compensation layer further comprises an encapsulation film layer 5 which is combined with the second adhesive layer in a layer-by-layer manner and faces away from the surface of the optical compensation layer 3; the encapsulation film layer 5 is selected from release films, and the thickness of the encapsulation film layer is 35 micrometers.
(2) Preparation method of anti-ultraviolet polarizer
The preparation method comprises the following steps:
Providing a polarizing plate 1;
the raw materials of the first bonding layer 2 are mixed to obtain a mixture of the first bonding layer 2, the first bonding layer 2 is bonded and arranged on the surface of any side of the polarizing plate 1,
An optical compensation layer 3 is attached to the surface of the first adhesive layer 2 facing away from the polarizing plate 1,
Mixing the raw materials of the second bonding layer 4 to obtain a second bonding layer 4 mixture, and bonding the second bonding layer 4 on the surface of the optical compensation layer 3, which is away from the first bonding layer 2, so as to obtain a composite layer structure;
And (3) placing the composite layer structure in an environment with the temperature of 35-40 ℃ and the RH of 60% for curing treatment for 120-140 hours, cutting to obtain the ultraviolet-proof polarizer with the specific size, and arranging the packaging layer 5 on the surface of the second bonding layer 4 of the ultraviolet-proof polarizer for protection.
Example 2
Ultraviolet-proof polarizer and preparation method thereof
In comparison with example 1, the first adhesive layer 2 includes the following components in parts by weight modified:
"first acrylic resin is 100 parts;
40 parts of ethyl acetate;
0.8 part of a first acrylic resin cross-linking agent;
2 parts of silane coupling agent;
0.2 part of first ultraviolet absorbent; the first ultraviolet absorber is selected from salicylate compounds ";
the second adhesive layer 4 comprises the following components in parts by weight:
"second acrylic resin 100 parts;
40 parts of ethyl acetate;
1.8 parts of a second acrylic resin cross-linking agent;
0.5 part of a second ultraviolet absorber; the second ultraviolet absorber is selected from the group consisting of phenones ";
Otherwise, in accordance with that provided in example 1, an anti-uv polarizer was prepared.
Example 3
Ultraviolet-proof polarizer and preparation method thereof
In comparison with example 1, the first adhesive layer 2 includes the following components in parts by weight modified:
"first acrylic resin is 100 parts;
50 parts of ethyl acetate;
1.5 parts of a first acrylic resin cross-linking agent;
2 parts of silane coupling agent;
0.5 part of first ultraviolet absorbent; the first ultraviolet absorber is selected from triazine compounds;
the second adhesive layer 4 comprises the following components in parts by weight:
"second acrylic resin 100 parts;
40 parts of ethyl acetate;
1.8 parts of a second acrylic resin cross-linking agent;
0.6 part of a second ultraviolet absorber; the second ultraviolet absorber is selected from substituted acrylonitrile compounds ";
Otherwise, in accordance with that provided in example 1, an anti-uv polarizer was prepared.
Performance testing and results analysis
As shown in FIG. 4, the transmittance of the polarizers prepared in examples 1-3 was measured by an ultraviolet spectrophotometer, the total transmittance of the polarizers prepared in examples 2 and 3 was very small in the wavelength range of 320-340nm, the absorption was omitted, the polarizer of example 1 had a good absorption effect on ultraviolet light in the whole ultraviolet band, and the anti-ultraviolet effect was stable.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. An anti-uv polarizer, the polarizer comprising:
A polarizing plate;
a first adhesive layer adhered to a surface of the polarizing plate;
The optical compensation layer is combined with the first bonding layer at a surface which faces away from the polarizing plate;
a second adhesive layer bonded to the optical compensation layer and facing away from the surface of the first adhesive layer;
Wherein the first adhesive layer comprises a first ultraviolet absorber, the second adhesive layer comprises a second ultraviolet absorber, and the first adhesive layer and the second adhesive layer respectively comprise different ultraviolet absorbers.
2. The anti-uv polarizer according to claim 1, wherein the first uv absorber is at least one selected from the group consisting of benzotriazole-based compounds, salicylate-based compounds, benzophenone-based compounds, substituted acrylonitrile-based compounds, triazine-based compounds, and hindered amine-based compounds; and/or the number of the groups of groups,
The second ultraviolet absorber is at least one selected from benzotriazole compounds, salicylate compounds, benzophenone compounds, substituted acrylonitrile compounds, triazine compounds and hindered amine compounds.
3. The anti-ultraviolet polarizer according to claim 1, wherein the ultraviolet absorption peak of the first ultraviolet absorber is 290nm to 400nm; and/or the number of the groups of groups,
The ultraviolet absorption peak of the second ultraviolet absorber is 240 nm-340 nm.
4. The ultraviolet-resistant polarizer according to any one of claims 1 to 3, wherein the first adhesive layer comprises the following components in parts by weight:
100 parts of a first acrylic resin;
30-50 parts of ethyl acetate;
0.5-1.5 parts of a first acrylic resin cross-linking agent;
2-3 parts of a silane coupling agent;
0.1-0.5 parts of a first ultraviolet absorber;
The solid content of the first acrylic resin is 17% -17.8%, and the solid content of the first acrylic resin crosslinking agent is 35% -55%; and/or the number of the groups of groups,
The second bonding layer comprises the following components in parts by weight:
100 parts of a second acrylic resin;
30-40 parts of ethyl acetate;
1.6-2 parts of a second acrylic resin cross-linking agent;
0.3-0.6 parts of a second ultraviolet absorber;
The solid content of the second acrylic resin is 21.6% -22%, and the solid content of the second acrylic resin crosslinking agent is selected from 50% -65%.
5. The ultraviolet polarizer according to any one of claims 1 to 3, wherein, along the direction from the first adhesive layer to the second adhesive layer, the optical compensation layer comprises a first optical compensation film, a water adhesive layer and a second optical compensation film which are laminated and combined in sequence, the first optical compensation film is attached to the surface of the first adhesive layer, and the second optical compensation film is attached to the surface of the second adhesive layer.
6. The anti-uv polarizer according to claim 5, wherein the first optical compensation film is selected from the group consisting of liquid crystal polymer films having a compensation value of 255 to 265; and/or the number of the groups of groups,
The second optical compensation film is selected from liquid crystal polymer films with compensation values of 116-122.
7. The ultraviolet-proof polarizer according to any one of claims 1 to 3, further comprising an encapsulation film layer, wherein the encapsulation film layer is laminated on the surface of the second adhesive layer and is away from the optical compensation layer.
8. The ultraviolet-proof polarizer according to any one of claims 1 to 3, wherein the thickness of the polarizing plate is 63 to 66 μm; and/or the number of the groups of groups,
The thickness of the first bonding layer is 5-7 microns; and/or the number of the groups of groups,
The thickness of the optical compensation layer is 8-12 microns; and/or the number of the groups of groups,
The thickness of the second bonding layer is 15-17 microns.
9. The preparation method of the ultraviolet-proof polaroid is characterized by comprising the following steps of:
Providing a polarizing plate;
A first bonding layer is attached to the surface of any side of the polarizing plate,
An optical compensation layer is attached to the surface of the first bonding layer, which is away from the polarizing plate,
A second bonding layer is bonded on the surface, deviating from the first bonding layer, of the optical compensation layer, so that a composite layer structure is obtained; wherein the first adhesive layer comprises a first ultraviolet absorber, the second adhesive layer comprises a second ultraviolet absorber, and the first adhesive layer and the second adhesive layer respectively comprise different ultraviolet absorbers;
and curing the composite layer structure to obtain the ultraviolet-proof polaroid.
10. The display device is characterized by comprising a display screen and a polaroid attached to any surface of the display screen, wherein the polaroid is the ultraviolet-proof polaroid according to any one of claims 1-8 or prepared by the preparation method of the ultraviolet-proof polaroid according to claim 9.
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