阅读说明：本技术 防紫外偏光片及其制备方法与应用 (Anti-ultraviolet polarizer and preparation method and application thereof ) 是由 赵汝齐 张建军 霍丙忠 于 2021-08-24 设计创作，主要内容包括：本申请涉及显示器件技术领域,提供了一种防紫外偏光片,所述偏光片包括偏光板；第一粘结层,所述第一粘结层粘结于所述偏光板的表面；光学补偿层,所述光学补偿层层叠结合于所述第一粘结层且背离所述偏光板的表面；第二粘结层,所述第二粘结层粘结于所述光学补偿层且背离所述第一粘结层的表面；其中,所述第一粘结层包括第一紫外吸收剂,所述第二粘结层包括第二紫外吸收剂。提供的两层分别包括不同紫外吸收剂的粘结层具有叠加吸收的作用,能够进一步提高对紫外光波段的吸收,使得到的偏光片具有较强的紫外光线的拦截能力,提高了偏光片的使用寿命。(The application relates to the technical field of display devices, and provides an ultraviolet-proof polarizer, which comprises a polarizing plate; a first adhesive layer adhered to a surface of the polarizing plate; the optical compensation layer is laminated and combined on the surface of the first bonding layer, which is far away from the polarizing plate; a second adhesive layer adhered to the optical compensation layer and facing away from a 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 provided bonding layers respectively comprising different ultraviolet absorbers have the function of superposition absorption, and can further improve the absorption of ultraviolet light wave bands, so that the obtained polaroid has stronger ultraviolet ray interception capability, and the service life of the polaroid is prolonged.)

1. An ultraviolet-proof polarizer, comprising:

a polarizing plate;

a first adhesive layer adhered to a surface of the polarizing plate;

the optical compensation layer is laminated and combined on the surface of the first bonding layer, which is far away from the polarizing plate;

a second adhesive layer adhered to the optical compensation layer and facing away from a 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.

2. The ultraviolet-resistant polarizer according to claim 1, wherein the first ultraviolet 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 presence of a gas in the gas,

the second ultraviolet absorbent is at least one selected from benzotriazole compounds, salicylate compounds, benzophenone compounds, substituted acrylonitrile compounds, triazine compounds and hindered amine compounds.

3. The ultraviolet-resistant polarizer according to claim 1, wherein the first ultraviolet absorption aid has an ultraviolet absorption peak of 290nm to 400 nm; and/or the presence of a gas in the gas,

the ultraviolet absorption peak of the second ultraviolet absorption auxiliary agent 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:

wherein 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 presence of a gas in the gas,

the second bonding layer 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 crosslinking agent is selected from 50-65%.

5. The ultraviolet-resistant polarizer according to any one of claims 1 to 3, wherein the optical compensation layer comprises a first optical compensation film, a glue layer and a second optical compensation film which are sequentially laminated and combined in the direction from the first adhesive layer to the second adhesive layer, wherein 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-ultraviolet polarizer of claim 5 wherein the first optical compensation film is selected from liquid crystal polymer films with a compensation value of 255-265; and/or the presence of a gas in the gas,

the second optical compensation film is selected from liquid crystal polymer films with the compensation value of 116-122.

7. The ultraviolet-resistant polarizer according to any one of claims 1 to 3, further comprising an encapsulating film layer laminated on the surface of the second adhesive layer facing away from the optical compensation layer.

8. The ultraviolet-resistant polarizer according to any one of claims 1 to 3, wherein the polarizer has a thickness of 63 to 66 μm; and/or the presence of a gas in the gas,

the thickness of the first bonding layer is 5-7 micrometers; and/or the presence of a gas in the gas,

the thickness of the optical compensation layer is 8-12 microns; and/or the presence of a gas in the gas,

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 adhesive layer is adhered to any one side surface of the polarizing plate,

an optical compensation layer is attached to the surface of the first bonding layer, which is deviated from the polarizing plate,

a second bonding layer is arranged on the surface, away from the first bonding layer, of the optical compensation layer in a bonding mode, so that a composite layer structure is obtained;

and curing the composite layer structure to obtain the anti-ultraviolet polarizer.

10. A display device is characterized by comprising a display screen and a polarizer which is attached to any surface of the display screen, wherein the polarizer is the ultraviolet-proof polarizer of any one of claims 1 to 8 or prepared by the preparation method of the ultraviolet-proof polarizer of claim 9.

Technical Field

The application belongs to the technical field of display devices, and particularly relates to an ultraviolet-proof polarizer and a preparation method and application thereof.

Background

The polarizer is one of indispensable parts in most display devices, and is widely applied in the display field, while in recent years, an OLED display screen is a development trend of the display industry, and the OLED display has the advantages of being light and thin, wide in viewing angle, high in contrast and the like, so that the OLED display is widely applied in the future display market.

The existing common display polaroid has single function, and various polaroids do not provide a technical means for preventing ultraviolet rays; some polarizers with ultraviolet-proof function also have certain defects: for example, a single film layer or an adhesive layer cannot completely prevent ultraviolet rays from transmitting, and a small part of the residual ultraviolet rays still have certain damage to the display element after penetrating through the polarizer; in addition, the extra coating or the external protective film can increase the thickness of the polarizer and the material cost, and the process is complicated, the structure is complex and the operation is not facilitated.

Therefore, in the display module assembly, many meticulous components and parts receive the ultraviolet irradiation from the environment easily and shorten life, lose the effect, make the probability that the display screen becomes useless screen will greatly increase, have influenced the life of display screen.

Disclosure of Invention

The application aims to provide an anti-ultraviolet polarizer and a preparation method and application thereof, and aims to solve the problem that the polarizer provided in the prior art is susceptible to ultraviolet rays and short in service life.

In order to achieve the purpose 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;

the first adhesive layer is adhered to the surface of the polarizing plate;

the optical compensation layer is laminated and combined on the first bonding layer and deviates from the surface of the polarizing plate;

the second bonding layer is bonded on the surface of the optical compensation layer, which is far away from the first bonding 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 ultraviolet-proof polarizer, comprising the following steps:

providing a polarizing plate;

a first adhesive layer is adhered to any one side surface of the polarizing plate,

an optical compensation layer is attached to the surface of the first bonding layer, which is opposite to the polarizing plate,

a second bonding layer is arranged on the surface, away from the first bonding layer, of the optical compensation layer in a bonding mode to obtain a composite layer structure;

and curing the composite layer structure to obtain the anti-ultraviolet polarizer.

In a third aspect, the present application provides a display device, where the display device includes a display screen and a polarizer attached to any surface of the display screen, where the polarizer is an anti-ultraviolet polarizer or prepared by a method for preparing an anti-ultraviolet polarizer.

The utility model provides an anti ultraviolet polaroid, polaroid include the polarizing plate, first tie coat, optical compensation layer and second tie coat, and, first tie coat includes first ultraviolet absorbent, and the second tie coat includes second ultraviolet absorbent. 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 anti ultraviolet seeing through, and owing to added different ultraviolet absorbent respectively, can ensure to enlarge the absorption effect to the ultraviolet wave band, guarantee to absorb as wide as possible ultraviolet wave band, on the other hand, two-layer tie coat that includes different ultraviolet absorbent respectively has the absorptive effect of stack, can further improve the absorption to the ultraviolet wave band, make the polaroid that obtains have stronger ultraviolet ray's interception ability, the life of polaroid has been improved.

According to the preparation method of the ultraviolet-proof polarizer, each layer of structure is sequentially arranged on the surface of the polarizing plate, the polarizer can be obtained through curing treatment, the obtained polarizer is provided with two bonding layers respectively comprising different ultraviolet absorbers, the ultraviolet band which is as wide as possible can be ensured to be absorbed, and the ultraviolet-proof polarizer has the function of superposition absorption, so that the obtained polarizer has strong ultraviolet ray interception capability, the preparation method is simple in process, large instruments and equipment do not need to be used, and the preparation method is simple and easy to operate and is beneficial to wide application.

The utility model provides a display device, this display device include the display screen and laminate the polaroid that sets up at the arbitrary surface of display screen, because the polaroid that provides can superpose and absorb the ultraviolet wave band as wide as possible, the display device who consequently obtains is difficult for receiving the influence of ultraviolet ray, improves display device's life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an ultraviolet-blocking polarizer provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an optical compensation layer provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an anti-UV polarizer (including an encapsulation film layer) provided in an embodiment of the present application;

fig. 4 is a performance test analysis diagram of the ultraviolet-proof polarizer provided in the embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1-a polarizer, 2-a first bonding layer, 3-an optical compensation layer, 4-a second bonding layer, 5-a packaging film layer; 301- -first optical compensation film, 302- -glue line, 303- -second optical compensation film.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (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, and c may be single or plural, respectively.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, 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 function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of 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 weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass in the description of the embodiments of the present application may be in units of mass known in the chemical industry, such as μ g, mg, g, and kg.

The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. 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 present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

A first aspect of an embodiment of the present application provides an anti-ultraviolet polarizer, as shown in fig. 1, the polarizer includes:

a polarizing plate 1;

the first adhesive layer 2, the first adhesive layer 2 is adhered to the surface of the polarizing plate 1;

the optical compensation layer 3, the optical compensation layer 3 is laminated and combined on the first adhesive layer 2 and departs from the surface of the polarizing plate 1;

a second adhesive layer 4, wherein the second adhesive layer 4 is adhered to the surface of the optical compensation layer 3, which is far away from 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 utility model provides an anti ultraviolet polaroid, polaroid include polarizing plate 1, first tie coat 2, optical compensation layer 3 and second tie coat 4 that the first aspect of this application provided, and wherein, first tie coat 2 includes first ultraviolet absorbent, and second tie coat 4 includes second ultraviolet absorbent. 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 anti ultraviolet seeing through, and owing to added different ultraviolet absorbent respectively, can ensure to enlarge the absorption effect to the ultraviolet light wave band, guarantee to absorb as wide as possible ultraviolet wave band, on the other hand, two-layer tie coat that includes different ultraviolet absorbent respectively has the absorptive effect of stack, can further improve the absorption to the ultraviolet light wave band, the polaroid that makes and obtain has stronger ultraviolet ray's interception ability, the life of polaroid has been improved.

Specifically, the polarizer includes a polarizing plate 1, and the polarizing plate 1 is provided to form polarized light after light passes through the polarizing plate 1.

In some embodiments, the polarizer 1 is selected from a two-layer composite polarizer 1 structure or a three-layer composite polarizer 1 structure. The double-layer composite polarizing plate 1 structurally comprises a polyvinyl alcohol film and a laminated cellulose triacetate film. The polyvinyl alcohol membrane that provides ensures to play the polarisation effect, and sets up triacetate cellulose membrane and can guarantee to deviate from 1 surfaces of polarizing plate of first tie coat for triacetate cellulose membrane, plays the guard action to the polyvinyl alcohol membrane.

In some embodiments, the three-layer composite polarizer 1 is a "sandwich" structure, and includes "cellulose triacetate film-polyvinyl alcohol film-cellulose triacetate film", the polyvinyl alcohol film is provided to ensure that the polarizing effect can be achieved, and the cellulose triacetate films are disposed on the polyvinyl alcohol films to protect the polyvinyl alcohol films, so as to ensure that the polyvinyl alcohol films do not absorb water and are affected by moisture.

In some embodiments, the thickness of the polarizer is 63-66 microns, so that the obtained polarizer is moderate in thickness, and the arrangement of other layer structures is facilitated.

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 bonding layer has a thickness of 5 to 7 μm. The first bonding layer is provided with a moderate thickness, which is beneficial to absorbing ultraviolet rays.

In some embodiments, the first bonding 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 crosslinking agent is 35-55%.

The first bonding layer 2 uses 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 absorbent are added in a synergistic manner for complex formulation, 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 be better bonded 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 flowability 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 resin crosslinker 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, and hindered amine compounds. Since the first adhesive layer 2 includes the first ultraviolet absorber, absorption of the ultraviolet band can be improved. The provided ultraviolet absorbent has high compatibility with acrylic resin, excellent heat resistance and light stability, and can be used favorably.

In a particular embodiment, the first ultraviolet absorbing aid is selected from benzotriazoles.

In some embodiments, the first ultraviolet absorption aid has an ultraviolet absorption peak of 290nm to 400nm, and the first ultraviolet absorption aid is further determined to have an ultraviolet absorption peak of 290nm to 400nm according to the kind of the first ultraviolet absorbent, so that the first adhesive layer 2 completely absorbs ultraviolet light having an ultraviolet absorption peak of 290nm to 400 nm.

In some embodiments, the first ultraviolet absorption aid has a strong absorption peak of the ultraviolet absorption peak in the range of 300nm to 380 nm.

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.

Set up two-layer tie coat at the polaroid interval, 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 anti ultraviolet seeing through, and owing to added different ultraviolet absorbent respectively, can ensure to enlarge the absorption effect to the ultraviolet wave band, guarantee to absorb as wide as possible ultraviolet wave band, on the other hand, two-layer tie coat that includes different ultraviolet absorbent respectively has the absorptive effect of stack, can further improve the absorption to the ultraviolet wave band, the polaroid that makes and obtain has stronger ultraviolet ray's interception ability, the life of polaroid has been improved.

In some embodiments, the thickness of the second bonding layer is 15-17 microns, the thickness of the second bonding layer is thicker than that of the first bonding layer, overlapping absorption is facilitated, and meanwhile ultraviolet rays which are not absorbed by the first bonding 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 takes second acrylic resin as a main component, and ethyl acetate, a second acrylic resin cross-linking agent and a second ultraviolet absorbent are added in a synergistic manner for complex use, so that the obtained second bonding layer 4 can be superposed with the first bonding layer 2 for use, better plays a role in 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 second acrylic resin is favorably bonded with a display screen of an OLED device.

In some embodiments, the second uv absorber is selected from at least one of benzotriazole-based compounds, salicylate-based compounds, benzophenone-based compounds, substituted acrylonitrile-based compounds, triazine-based compounds, and hindered amine-based compounds. Since the second adhesive layer 4 includes the second ultraviolet absorber, absorption of the ultraviolet band can be improved. The provided ultraviolet absorbent has high compatibility with acrylic resin, excellent heat resistance and light stability, and can be used favorably.

In some embodiments, the second ultraviolet absorption aid has an ultraviolet absorption peak in the range of 240nm to 340 nm. 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 nm-340 nm, so that the second bonding layer 4 can completely absorb the ultraviolet light with the ultraviolet absorption peak of 240 nm-340 nm. In some embodiments, the second uv absorbing adjuvant has a strong absorption peak of uv absorption peak in the range of 260nm to 310 nm. Through overlapping the first bonding layer and the second bonding layer, ultraviolet light with the wavelength of 240-400 nm can be absorbed, a certain overlapping absorption effect is ensured, the obtained polaroid has strong ultraviolet light interception capability, and the service life of the polaroid is prolonged.

In a particular embodiment, the second uv absorber is selected from the group consisting of 3: the mixture of the 1 2-hydroxy-4-octyloxy benzophenone and the hindered amine compound is provided as a second ultraviolet absorbent, and is further used together with a first ultraviolet absorbent of a benzotriazole compound in an overlapping manner, so that ultraviolet light with a wavelength of 240-400 nm can be absorbed, the obtained polarizer has strong ultraviolet ray interception capability, and the service life of the polarizer is prolonged.

Specifically, the polarizer comprises an optical compensation layer 3, wherein the optical compensation layer 3 is laminated on the first bonding layer 2 and deviates from the surface of the polarizing plate 1; the optical compensation layer 3 is arranged between the first bonding layer 2 and the second bonding layer 4, so that light transmitted by the optical compensation layer 3 can be compensated, and the light is enabled to be fuller.

In some embodiments, the thickness of the optical compensation layer is 8-12 microns, and the optical compensation layer with moderate thickness is provided, so that light can be supplemented.

In some embodiments, as shown in fig. 2, the optical compensation layer 3 includes a first optical compensation film 301, a glue layer 302, and a second optical compensation film 303 sequentially stacked and combined along a direction from the first adhesive layer 2 to the second adhesive layer 4, wherein the first optical compensation film 301 is disposed to be attached to a surface of the first adhesive layer 2, and the second optical compensation film 302 is disposed to be attached to a surface of the second adhesive layer 2.

In some embodiments, the first optical compensation film 301 and the second optical compensation film 303 have a thickness of 4 to 6 microns.

In some embodiments, the materials of the first optical compensation film 301 and the second optical compensation film 303 are selected from liquid crystal polymer film materials.

In some embodiments, the first optical compensation film 301 is selected from liquid crystal polymer films with compensation values of 255-265; the liquid crystal film can realize the function of a half wave plate, so that the polarization direction of the transmitted light is vertical to the original polarization direction.

In some embodiments, the second optical compensation film 303 is selected from the group consisting of a liquid crystal polymer film with a compensation value of 116-; the liquid crystal film can realize the function of a quarter-wave plate, so that the transmitted light becomes elliptically polarized light.

The transmittance of the obtained integral polaroid is 40-44% by arranging the two optical compensation films, and the polarization degree is more than or equal to 99.8%. The light transmitted by the optical compensation layer 3 can be compensated, and the light can be more fully obtained.

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 away from the optical compensation layer 3, so that the encapsulation film 5 can protect the films from air and moisture.

In some embodiments, the encapsulation film layer 5 is selected from release films. The release film can protect each film layer, so that each film layer material cannot be influenced by air and moisture. And in the process of attaching the polarizer and the OLED display screen, tearing off the release film, and contacting, laminating and attaching the second bonding layer and the OLED display screen.

The second aspect of the embodiments of the present application provides a method for preparing an ultraviolet-proof polarizer, including the following steps:

s01, providing a polarizing plate 1;

s02, a first bonding layer 2 is attached to the surface of any one side of a polarizing plate 1,

s03, an optical compensation layer 3 is attached to the surface, away from the polarizing plate 1, of the first bonding layer 2,

s04, attaching a second bonding layer 4 to the surface, deviating from the first bonding layer 2, of the optical compensation layer 3 to obtain a composite layer structure;

and S05, curing the composite layer structure to obtain the anti-ultraviolet polarizer.

According to the preparation method of the ultraviolet-proof polarizer, each layer structure is sequentially arranged on the surface of the polarizing plate 1, the polarizer can be obtained through curing treatment, the obtained polarizer is provided with two bonding layers respectively comprising different ultraviolet absorbers, the ultraviolet band which is as wide as possible can be ensured to be absorbed, and the ultraviolet-proof polarizer has the function of overlapped absorption, so that the obtained polarizer has strong ultraviolet ray interception capability, the preparation method is simple in process, large instruments and equipment do not need to be used, and the preparation method is simple and easy to operate and is beneficial to wide application.

In step S01, a polarizing plate 1 and a polarizing plate 1 are provided, where the polarizing plate 1 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 bonded to one surface 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 absorbent according to the formula of the first bonding layer 2;

s022, uniformly mixing the components to obtain a first bonding layer 2 mixed material.

In some embodiments, the first adhesive layer 2 mixture is coated on any one side surface of the polarizing plate 1 to form a first adhesive layer 2; wherein, the adhesion force between the first adhesive layer 2 and the surface of the polarizing plate 1 is 200-400gf/25mm, ensuring firm adhesion.

In step S03, the optical compensation layer 3 is attached to the surface of the first adhesive layer 2 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, which are sequentially stacked and combined.

In some embodiments, the method of preparing the optical compensation layer 3 includes the steps of:

s031, coating a layer of glue 302 on any side of the first optical compensation film 301;

s032, laminating and adhering a second optical compensation film on the surface of the glue layer 302 departing from the first optical compensation film 301 to obtain an optical compensation layer 3.

In some embodiments, the optical compensation layer 3 is attached to a surface of the first adhesive layer 2 away from the polarizer 1, wherein the first optical compensation film 301 is attached to the first adhesive layer 2.

In step S04, the second adhesive layer 4 is attached to the surface of the optical compensation layer 3 away from the first adhesive layer 2, so as to obtain a composite layer structure.

In some embodiments, the method of making the second adhesive layer 4 comprises the steps of:

s041. providing a second acrylic resin, ethyl acetate, a second acrylic resin crosslinker, and a second uv absorber according to the formulation of the second tie layer 4;

s042, uniformly mixing the components to obtain a second bonding layer 4 mixed material.

In some embodiments, the second adhesive layer 4 compound is coated on the surface of the second optical compensation film in the optical compensation layer 3 to form the second adhesive layer 4.

In step S05, the composite layer structure is cured to obtain the anti-uv polarizer.

In some embodiments, the composite layer structure is placed in an environment with a temperature of 35-40 ℃ and a relative humidity of 60 RH% for curing for 120-140 hours, and then cut to obtain the anti-ultraviolet 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 bonding layer 4 away from the optical compensation layer 3, and the 90 ° adhesion force range between the attached encapsulation layer and the second bonding layer 4 is 220-260 gf/25mm, so that each film layer is protected, and the material of each film layer is not affected 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.

The utility model provides a display device, this display device include the display screen and laminate the polaroid that sets up at the arbitrary surface of display screen, because the polaroid that provides can superpose and absorb the ultraviolet wave band as wide as possible, the display device who consequently obtains is difficult for receiving the influence of ultraviolet ray, improves display device's life.

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, which are conventional display devices.

The following description will be given with reference to specific examples.

Example 1

Anti-ultraviolet polarizer and preparation method thereof

(1) Anti-ultraviolet polarizer

The anti-ultraviolet polarizer includes:

a polarizing plate 1;

the first adhesive layer 2, the first adhesive layer 2 is adhered to the surface of the polarizing plate 1;

the optical compensation layer 3, the optical compensation layer 3 is laminated and combined on the first adhesive layer 2 and departs from the surface of the polarizing plate 1;

a second adhesive layer 4, wherein the second adhesive layer 4 is adhered to the surface of the optical compensation layer 3, which is far away from the first adhesive layer 2;

the polarizing plate 1 is selected from a double-layer composite polarizing plate 1 structure, and the double-layer composite polarizing plate 1 structure comprises a polyvinyl alcohol film and a laminated cellulose triacetate film; the thickness of the polarizer plate was 65 μm,

along the direction from the first bonding layer 2 to the second bonding layer 4, the optical compensation layer 3 comprises a first optical compensation film 301, a glue layer 302 and a second optical compensation film 303 which are sequentially laminated and combined, wherein the first optical compensation film 301 is attached to the surface of the first bonding layer 2, and the second optical compensation film 302 is attached to the surface of the second bonding layer 2; the first optical compensation film is selected from the liquid crystal polymer film with the compensation value of 255-265 and the thickness of 4 microns, and the second optical compensation film is selected from the liquid crystal polymer film with the compensation value of 116-122 and the thickness of 4 microns; the thickness of the optical compensation layer was 9 μm;

the thickness of the first bonding layer is 6 microns;

the thickness of the second adhesive layer was 16 microns;

the first bonding layer 2 comprises the following components in parts by weight:

100 parts of first acrylic resin;

30 parts of ethyl acetate;

0.5 part of first acrylic resin crosslinking agent;

2 parts of a silane coupling agent;

0.1 part of first ultraviolet absorbent; the first ultraviolet absorbent 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 bonding layer 4 comprises the following components in parts by weight:

the second acrylic resin is 100 parts;

ethyl acetate 35 parts;

1.6 parts of a second acrylic resin crosslinking agent;

0.3 part of second ultraviolet absorbent; the second ultraviolet absorbent is selected from 2-hydroxy-4-octoxy benzophenone and hindered amine light stabilizer with the mass ratio of 3: 1; controlling the ultraviolet absorption peak of the second ultraviolet absorption auxiliary agent to be 240 nm-340 nm;

wherein the solid content of the second acrylic resin is 21.6-22%;

the optical compensation device also comprises an encapsulation film layer 5, wherein the encapsulation film layer is laminated on the surface of the second bonding layer 4 and departs from 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 microns.

(2) Preparation method of anti-ultraviolet polaroid

The preparation method comprises the following steps:

providing a polarizing plate 1;

mixing the raw materials of the first bonding layer 2 to obtain a first bonding layer 2 mixed material, attaching the first bonding layer 2 to 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, which is opposite to the surface of the polarizing plate 1,

mixing the raw materials of the second bonding layer 4 to obtain a second bonding layer 4 mixed material, and attaching the second bonding layer 4 to the surface of the optical compensation layer 3, which is far away from the first bonding layer 2, 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 for 120-140 hours, then cutting to obtain the anti-ultraviolet polarizer with a specific size, and arranging a packaging layer 5 on the surface of the second bonding layer 4 of the anti-ultraviolet polarizer for protection.

Example 2

Anti-ultraviolet polarizer and preparation method thereof

Compared with the embodiment 1, the first bonding layer 2 comprises the following components in parts by weight:

"first acrylic resin is 100 parts;

ethyl acetate 40 parts;

0.8 part of first acrylic resin crosslinking agent;

2 parts of a silane coupling agent;

0.2 part of first ultraviolet absorbent; the first ultraviolet absorbent is selected from salicylate compounds;

the second bonding layer 4 comprises the following components in parts by weight:

"second acrylic resin is 100 parts;

ethyl acetate 40 parts;

1.8 parts of a second acrylic resin crosslinking agent;

0.5 part of second ultraviolet absorbent; the second ultraviolet absorbent is selected from benzophenone compounds;

the rest were identical to those provided in example 1, and an ultraviolet-blocking polarizer was prepared.

Example 3

Anti-ultraviolet polarizer and preparation method thereof

Compared with the embodiment 1, the first bonding layer 2 comprises the following components in parts by weight:

"first acrylic resin is 100 parts;

ethyl acetate is 50 parts;

1.5 parts of a first acrylic resin crosslinking agent;

2 parts of a silane coupling agent;

0.5 part of first ultraviolet absorbent; the first ultraviolet absorber is selected from triazine compounds;

the second bonding layer 4 comprises the following components in parts by weight:

"second acrylic resin is 100 parts;

ethyl acetate 40 parts;

1.8 parts of a second acrylic resin crosslinking agent;

0.6 part of second ultraviolet absorbent; the second ultraviolet absorbent is selected from substituted acrylonitrile compounds;

the rest were identical to those provided in example 1, and an ultraviolet-blocking polarizer was prepared.

Performance testing and results analysis

As shown in fig. 4, the transmittance of the polarizers prepared in examples 1-3 is measured by an ultraviolet spectrophotometer, the polarizers obtained in examples 2 and 3 have very small absorption omission of light in the wavelength region of 320-340nm, the polarizer of example 1 has good absorption effect on the ultraviolet light in the whole ultraviolet band, and the anti-ultraviolet effect is stable, in conclusion, the best anti-ultraviolet agent matched with the polarizer of the present application is the combination of benzotriazole compounds, hindered amine light stabilizers, and 2-hydroxy-4-octyloxybenzophenone.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.