CN113075759A - Polarizing plate, manufacturing method thereof and display panel - Google Patents
Polarizing plate, manufacturing method thereof and display panel Download PDFInfo
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- CN113075759A CN113075759A CN202110334001.XA CN202110334001A CN113075759A CN 113075759 A CN113075759 A CN 113075759A CN 202110334001 A CN202110334001 A CN 202110334001A CN 113075759 A CN113075759 A CN 113075759A
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Images
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
- G02B5/305—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 including organic materials, e.g. polymeric layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
The application provides a polarizing plate, a manufacturing method of the polarizing plate and a display panel. The first hardened coating is disposed on the polarizing sublayer. The pressure-sensitive adhesive layer is arranged on one side of the polarizing sublayer far away from the first hardening coating. The polarizing plate provided by the application has a simple structure, the manufacturing process is effectively simplified, and the production cost is saved.
Description
Technical Field
The application relates to the technical field of display, in particular to a polarizing plate, a manufacturing method of the polarizing plate and a display panel.
Background
The flat display device has many advantages of thin body, power saving, no radiation, etc., and is widely used. The conventional flat panel Display device mainly includes a Liquid Crystal Display (LCD) and an Organic Light Emitting Diode (OLED) Display.
The LCD device generally includes a liquid crystal panel and polarizing plates disposed on upper and lower sides of the liquid crystal panel, the lower polarizing plate is used to convert light beams generated by the backlight source into polarized light, and the upper polarizing plate is used to analyze the polarized light after electrical modulation of the liquid crystal to generate light-dark contrast, thereby generating a display image. The light-emitting surface of the OLED display device is usually provided with a polarizer to prevent the display screen from reflecting light.
However, the structure of the polarizing plate in the prior art is complex, which is not favorable for realizing lightness and thinness.
Disclosure of Invention
The application provides a polarizing plate, a manufacturing method of the polarizing plate and a display panel, which are used for solving the technical problems that the film layer structure of the polarizing plate is complex and is not beneficial to realizing lightness and thinness in the prior art.
The present application provides a polarizing plate, comprising:
a polarizing sublayer;
a first hardened coating disposed on the polarizing sublayer; and
and the pressure-sensitive adhesive layer is arranged on one side of the polarizing sublayer, which is far away from the first hardening coating.
Optionally, in the polarizing plate provided in the present application, the polarizing plate further includes:
the first adhesive layer is arranged on one side, close to the pressure-sensitive adhesive layer, of the polarizing sublayer;
the first protective layer is arranged on one side, close to the pressure-sensitive adhesive layer, of the first adhesive layer.
Optionally, in the polarizing plate provided in the present application, the polarizing plate further includes a second hardening coating layer, and the second hardening coating layer is disposed between the polarizing sublayer and the pressure-sensitive adhesive layer.
Optionally, in the polarizing plate provided in the present application, the first hard coating layer includes at least one sub hard coating layer, and each of the sub hard coating layers has a corresponding reflectivity.
Optionally, in the polarizing plate provided by the present application, a surface of the first hard coating layer, which is away from the polarizing sublayer, is a concave-convex surface.
Optionally, in the polarizing plate provided in the present application, the thickness of the first hardening coating is 5 to 50 micrometers.
Alternatively, in the polarizing plate provided by the present application, the first hardening coating layer includes one or more particles of silicon dioxide, acryl, or acrylonitrile-butadiene-styrene plastic.
Optionally, in the polarizing plate provided by the present application, the particle size of the particles is 5 to 20 micrometers.
The present application also provides a method for manufacturing a polarizing plate, which includes:
providing a polarizing sublayer;
forming a pressure-sensitive adhesive layer on the polarizing sublayer;
and forming a first hardening coating on one side of the polarizing sublayer far away from the pressure-sensitive adhesive layer.
Optionally, in the manufacturing method of the polarizing plate provided by the present application, the first hardening coating layer is formed on a side of the polarizing sublayer away from the pressure-sensitive adhesive layer while the pressure-sensitive adhesive layer is formed on the polarizing sublayer.
Optionally, in the method for manufacturing a polarizing plate provided in the present application, the forming a first hardening coating on a side of the polarizing sublayer away from the pressure-sensitive adhesive layer includes:
coating a coating material on the side of the polarizing sublayer away from the pressure-sensitive adhesive layer;
photocuring the coating material to form the first hardened coating;
the coating material comprises ultraviolet curing glue, particles and a solvent, wherein the particles are made of one or more of silicon dioxide, acrylic or acrylonitrile-butadiene-styrene plastics, and the solvent is one or more of propylene glycol methyl ether acetate, propylene glycol diacetate, methylene bisacrylamide, N-methyl pyrrolidone, ethyl 3-ethoxypropionate, cyclohexanone and dichloromethane.
Optionally, in the method for manufacturing a polarizing plate provided by the present application, a mass ratio of the particles to the solvent is 0.1% to 5%.
Correspondingly, the application also provides a display panel which comprises the polarizing plate.
The application provides a polarizing plate, a manufacturing method of the polarizing plate and a display panel. The first hardened coating is disposed on the polarizing sublayer; the pressure-sensitive adhesive layer is arranged on one side of the polarizing sublayer far away from the first hardening coating. The polarizing plate is simple in structure, the light and thin polarizing plate is achieved, the manufacturing process is effectively simplified, and the production cost is saved.
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 description of the embodiments are briefly introduced 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 based on these drawings without creative efforts.
FIG. 1 is a schematic view of a prior art polarizer plate;
FIG. 2 is a schematic view of a first structure of a polarizing plate provided herein;
FIG. 3 is a schematic structural view of the first hardened coating of FIG. 2;
FIG. 4 is a schematic diagram of a second structure of the polarizing plate provided in the present application;
FIG. 5 is a schematic diagram of a third structure of a polarizer provided herein;
FIG. 6 is a schematic diagram of a fourth structure of the polarizing plate provided in the present application;
FIG. 7 is a schematic diagram of a fifth structure of a polarizing plate provided herein;
FIG. 8 is a schematic diagram of a first process of a method for manufacturing a polarizer according to the present disclosure;
fig. 9 is a second flowchart of a method for manufacturing a polarizing plate according to the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a polarizing plate 200 in the prior art. The polarizing plate 200 includes a polarizing sublayer 10, and a first adhesive layer 11, a first transparent protective layer 12 and a first pressure-sensitive adhesive layer 30 are sequentially stacked on a lower surface of the polarizing sublayer 10. The first transparent protective layer 12 is attached to the polarizing sublayer 10 through the first adhesive layer 11. The upper surface of the polarizing sublayer 10 is provided with a second adhesive layer 13, a second transparent protective layer 14, and a surface treatment layer 15 in this order. The second transparent protective layer 14 is attached to the polarizing sublayer 10 through the second adhesive layer 13. Wherein, the upper surface and the lower surface are two opposite surfaces of the polarizing sublayer 10.
Specifically, the first Adhesive layer 11 and the second Adhesive layer 13 may be liquid Clear Adhesive (OCA) or Solid Optical Adhesive (SCA). The first and second transparent protective layers 12 and 14 may be resin films such as TAC (cellulose triacetate), PET (ethylene terephthalate), PMMA (acryl), and the like. The surface treatment layer 15 includes a surface curable solvent and fine particles to improve the abrasion resistance of the polarizing plate 200.
As can be seen, the conventional polarizing plate 200 has many film layers, which makes it difficult to make the polarizing plate 200 thinner.
In this regard, the present application provides a polarizing plate 100. Specifically, referring to fig. 2, fig. 2 is a schematic view of a first structure of the polarizing plate 100 provided in the present application. The polarizing plate 100 provided herein includes a polarizing sublayer 10, a first hardening coating layer 20, and a pressure-sensitive adhesive layer 30. Wherein the first hardened coating 20 is disposed on the polarizing sublayer 10. The pressure sensitive adhesive layer 30 is disposed on the side of the polarizing sublayer 10 away from the first hardened coating 20.
In the present application, the material of the polarizing sublayer 10 is typically a polyvinyl alcohol (PVA) film subjected to stretching treatment. The PVA is prepared by using vinyl acetate monomer synthesized by ethylene, acetic acid and oxygen as a raw material through polymerization and saponification. The PVA film produced by the stretching treatment has good optical transparency, good affinity with inorganic and organic dyes such as iodine, and high orientation during stretching. The polymerization degree of the PVA film is generally 1700, 2400, 2600, 4000, etc., and the higher the polymerization degree, the higher the quality of the polarizing plate 100 produced using the same.
In the present application, the thickness of the first hardened coating 20 is 5 micrometers to 50 micrometers. For example, in some embodiments, the thickness of the first hardened coating 20 can be 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, or 50 microns.
In an embodiment of the present application, the first hardened coating 20 includes at least one sub-hardened coating 210, and each sub-hardened coating 210 has a corresponding reflectivity. The reflectances of the adjacent sub hardened coatings 210 may be the same or different.
Specifically, referring to fig. 3, fig. 3 is a schematic structural diagram of the first hardened coating 20 in fig. 2. In the present application, the first hardened coating 20 includes three sub-hardened coatings 210. Wherein each sub-hardened coating 210 has a corresponding reflectivity, and adjacent sub-hardened coatings 210 cooperate with each other to make the first hardened coating 20 have a low reflectivity characteristic.
The first hardened coating material forming each sub-hardened coating 210 includes an ultraviolet light-curable glue. The ultraviolet light curing adhesive is also called shadowless adhesive, UV light curing adhesive or photosensitive adhesive. The ultraviolet curing adhesive is an adhesive which can be cured only by ultraviolet irradiation, and can be used as an adhesive and also can be used as a sizing material of paint, coating, ink and the like. In addition, the ultraviolet curing adhesive has the advantages of fast curing, low energy consumption, no solvent pollution and the like, and is a novel energy-saving and environment-friendly adhesive.
Wherein, the curing dominant wavelength of the ultraviolet curing adhesive is 250 to 400 nanometers. For example, in some embodiments, the curing dominant wavelength of the uv curable glue may be 250 nm, 300 nm, 350 nm, or 400 nm.
Wherein the refractive index of the ultraviolet light curing adhesive is 1.45-1.55. For example, in some embodiments, the refractive index of the uv curable glue may be 1.45, 1.48, 1.50, 1.52, or 1.55.
It will be appreciated that the reflectivity is related to the wavelength of the incident light, the thickness of the incident interface, and the material of the incident interface. Therefore, in the present application, the reflectivity of each sub-cured coating 210 can be controlled by controlling the reflectivity, the refractive index, or the thickness of each sub-cured coating 210 of the uv curable glue in the material forming each sub-cured coating 210.
It should be noted that, in other embodiments of the present application, the first hardened coating 20 may also include one sub hardened coating 210 or two sub hardened coatings 210, which may be specifically designed according to the functional requirements of the polarizing plate 100, and this embodiment is not to be construed as limiting the present application.
Further, in the embodiment of the present application, the first hardened coating material forming the first hardened coating 20 may include one or more of other photo-curable polymers, thermal-curable polymers, solvents and particles in addition to the uv curable glue.
Wherein the photo-curable polymer and the thermosetting polymerizable material comprise one or more of epoxy acrylate, urethane acrylate, polyether acrylate, polyester acrylate and acrylic resin. The photo-curable polymer and the thermosetting polymerizable substance are used for improving the crosslinking degree, improving the flexibility of the film layer, reducing the viscosity of the resin and the like.
Wherein, the solvent can be one or more of propylene glycol methyl ether acetate, propylene glycol diacetate, methylene bisacrylamide, N-methyl pyrrolidone, 3-ethoxy ethyl propionate, cyclohexanone and dichloromethane. The solvent is used to adjust the viscosity of the material of the first hardened coating 20 for ease of coating.
Wherein, the material of the particles 21 is one or more of silicon dioxide, acrylic or acrylonitrile-butadiene-styrene plastic. The particles 21 are doped in the first hard coating material for adjusting an Anti-glare (AG) effect of the first hard coating 20. Among them, glare refers to a visual condition in the visual field due to unfavorable luminance distribution or extreme luminance contrast in space or time, so as to cause visual discomfort and reduce visibility of an object. Specifically, different AG coatings can be made by adjusting the particle size and doping ratio of the particles in the first hardened coating material.
Specifically, in an embodiment of the present application, the material of the first hardened coating 20 includes an ultraviolet light-curable glue, particles and a solvent. Since silica is economical, the particles are exemplified as silica in the examples of the present application, but the present application is not limited thereto. In this embodiment, the solvent is used to adjust the viscosity of the first hardened coating material, so that on one hand, the silica is uniformly dispersed in the first hardened coating material, and further the silica is uniformly distributed in the first hardened coating 20, thereby improving the anti-glare effect of the first hardened coating 20; on the other hand, the first hard coat material is easily applied to the polarizing sublayer 10.
Further, in the coating material, the mass ratio of the particles to the solvent is 0.1% to 5%. For example, when the particles are silica, the mass ratio of silica to the solvent is 0.1%, 1%, 2%, 3%, 4%, or 5%. The proportion enables the silicon dioxide to be uniformly dispersed in the first hardened coating material, so that the silicon dioxide can be conveniently coated on the polarizing sublayer 10, and the process difficulty is reduced. Wherein, the solvent can be selected according to the characteristics of the ultraviolet light curing glue.
In another embodiment of the present application, the material of the first hardened coating 20 includes uv curable glue, particles, solvent and heat curable polymer.
It will be appreciated that uv curable adhesives are a class of adhesives that must be cured by irradiation with uv light. In order to increase the hardening speed of the first hardened coating 20, a thermally curable polymer may be added to the material of the first hardened coating 20, and the hardening speed of the first hardened coating 20 may be increased by using both ultraviolet curing and thermal curing.
In the present embodiment, the material of the pressure-sensitive adhesive layer 30 is typically a polypropylene-based adhesive. Polypropylene adhesives are colorless and transparent in appearance and have excellent weatherability, and generally can give excellent pressure-sensitive adhesive properties without using additives such as tackifying resins, softeners and antioxidants. By applying pressure to the pressure-sensitive adhesive layer 30, the pressure-sensitive adhesive layer 30 can immediately achieve the purpose of adhering any adherend's smooth surface. Meanwhile, if the adherend bonding surface is damaged, the pressure-sensitive adhesive layer 30 does not contaminate the adherend surface.
The polarizing plate 100 provided in the embodiment of the present application includes a polarizing sublayer 10, a first hardening coating layer 20, and a pressure-sensitive adhesive layer 30. In the embodiment of the present application, the first hardening coating layer 20 and the pressure-sensitive adhesive layer 30 are directly coated on two opposite surfaces of the polarizing sublayer 10, so that the first hardening coating layer 20 simultaneously functions as a protective layer and a functional coating layer, and the pressure-sensitive adhesive layer 30 simultaneously functions as a protective layer and a functional coating layer for protecting the polarizing sublayer 10. Therefore, the first adhesive layer 11, the first transparent protective layer 12, the second adhesive layer 13, and the second transparent protective layer 14 in the polarizing plate 200 shown in fig. 1 are omitted. Therefore, the polarizing plate 100 provided in the embodiment of the present application has a simple structure, on one hand, the polarizing plate 100 is light and thin, and on the other hand, the consumables are reduced, thereby saving the production cost.
Referring to fig. 4, fig. 4 is a schematic diagram of a second structure of the polarizing plate 100 provided in the present application. The polarizing plate 100 provided in the embodiment of the present application further includes a second hardening coating 40, which is different from the polarizing plate 100 shown in fig. 2. The second hardened coating 40 is disposed between the polarizing sublayer 10 and the pressure sensitive adhesive layer 30.
The material composition and the physical and chemical properties of the second hardened coating 40 are the same as those of the first hardened coating 20, and please refer to the above embodiments, which are not described herein again.
The embodiment of the present application disposes the second hardening coating layer 40 between the polarizing sublayer 10 and the pressure-sensitive adhesive layer 30, and adds a film layer to the polarizing plate 100 shown in fig. 2. However, compared to the polarizing plate 200 shown in fig. 1, the first adhesive layer 11, the first transparent protection layer 12, the second adhesive layer 13, and the second transparent protection layer 14 in the polarizing plate 200 are also omitted in the embodiments of the present disclosure. Moreover, the second hard coat layer 40 can better protect the polarizer layer 10, and the polarizer 100 is fully protected, so that the polarizer is light and thin, and consumables are saved.
Referring to fig. 5, fig. 5 is a schematic diagram of a third structure of the polarizing plate 100 provided in the present application. The difference from the polarizing plate 100 shown in fig. 2 is that the polarizing plate 100 provided in the embodiment of the present application further includes a first adhesive layer 11 and a first transparent protective layer 12.
Wherein, the first adhesive layer 11 is disposed on one side of the polarizing sublayer 10 close to the pressure-sensitive adhesive layer 30. The first transparent protective layer 12 is disposed on the side of the first adhesive layer 11 adjacent to the pressure-sensitive adhesive layer 30.
The first transparent protective layer 12 is used to protect the polarizing sublayer 10. The first adhesive layer 11 is used for attaching the first transparent protective layer 12 to the polarizing sublayer 10. The first transparent protective layer 12 may be a TAC film. The TAC film is inexpensive and has high water vapor transmittance at high temperature and high humidity, and thus suppresses the formation of microbubbles and improves durability even if the polarizing plate 100 is maintained at high temperature.
In comparison with the polarizing plate 200 shown in fig. 1, the polarizing plate 100 provided in the embodiment of the present disclosure uses the first hard coat layer 20 instead of the second adhesive layer 13, the second transparent protective layer 14, and the surface treatment layer 15. The first hardened coating 20 simultaneously functions as a protective layer and a functional coating, so that the polarizing plate 100 provided by the embodiment of the present application is light and thin, and consumables are saved.
Referring to fig. 6, fig. 6 is a schematic diagram of a fourth structure of the polarizing plate 100 provided in the present application, and is different from the polarizing plate 100 shown in fig. 2 in that, in the polarizing plate 100 provided in the present application, a surface of the first hard coat layer 20 away from the polarizer layer 10 is a concave-convex surface.
Specifically, the surface 201 of the first hard coat layer 20 away from the polarizing sublayer 10 may be an uneven surface by at least one of imprinting, transfer printing, and relief printing. And then the light is redistributed by utilizing the characteristics of diffuse reflection and diffuse transmission of the light by the concave-convex surface so as to generate the effect of soft and natural diffused light, so that the first hardened coating 20 has the anti-dazzle effect.
Further, referring to fig. 7, fig. 7 is a schematic diagram illustrating a fifth structure of the polarizing plate 100 provided in the present application, and is different from the polarizing plate 100 shown in fig. 6 in that in the polarizing plate 100 provided in the present embodiment, the first cured coating 20 includes one or more particles 21 of silicon dioxide, acrylic, or acrylonitrile-butadiene-styrene plastic. The surface of the first hard coating layer 20 away from the polarizing sublayer 10 has a plurality of protrusions, and each protrusion corresponds to a particle 21. That is, the particles 21 are doped in the material of the first hardened coating 20, and a part of the particles 21 are arranged on the surface 201 of the first hardened coating 20 away from the polarizing sublayer 10 in a protruding manner, so that the surface 201 of the first hardened coating 20 away from the polarizing sublayer 10 is a concave-convex surface, and the anti-glare effect of the first hardened coating 20 is further improved.
Specifically, the morphology of the surface 201 of the first hardened coating 20 away from the polarizing sublayer 10 can be controlled by controlling the particle size of the particles 21 and the coating thickness of the first hardened coating material. For example, the difference between the particle size of the particles 21 and the coating thickness of the first hard coating material may be controlled to be 0.5 to 7 micrometers, so that the surface of the first hard coating layer 20 away from the polarizing sublayer 10 has a plurality of protrusions, and each protrusion corresponds to a corresponding particle 21.
It should be noted that, in the present application, the first hardened coating 20 may be further processed by hardening (Hard Coat, HC), Low reflection (LR, Low-reflection), Anti-reflection (AR), and the like according to practical application requirements, so as to implement the first hardened coating 20 with different functions.
In addition, the second hardened coating material forming the second hardened coating in the present application is the same as the first hardened coating material, and is not described herein again.
The application also provides a manufacturing method of the polarizing plate. Specifically, referring to fig. 2 and 8, fig. 8 is a schematic view of a first process of a method for manufacturing a polarizing plate 100 according to the present application, where the method includes the following steps:
101. a polarizing sublayer 10 is provided.
Specifically, a polyvinyl alcohol film is provided, and the polyvinyl alcohol film is stretched to form the polarizing sublayer 10.
Specifically, the polyvinyl alcohol film can be stretched by adopting a casting sheet production process. The production process of the cast sheet material is that resin is melted and plasticized by an extruder, extruded by a die orifice of a slit machine head, so that a melt material is attached to a cooling roller tightly, and then the sheet material is prepared by the working procedures of stretching, trimming, coiling and the like.
102. A pressure-sensitive adhesive layer 30 is formed on the polarizing sublayer 10.
Specifically, a polypropylene-based adhesive is disposed on the polarizing sublayer 10 using an inkjet printing or coating process to form the pressure-sensitive adhesive layer 30.
103. The first hardened coating 20 is formed on the side of the polarizing sublayer 10 remote from the pressure-sensitive adhesive layer 30.
Specifically, first, the pressure-sensitive adhesive layer 30 is coated on the polarizing sublayer 10. Then, the polarizing sublayer 10 to which the pressure-sensitive adhesive layer 30 is attached is formed into a semi-finished product at a stretching station. Finally, the semi-finished product is transferred to a coating station, and a first hardened coating 20 is formed on the side of the polarizing sublayer 10 remote from the pressure-sensitive adhesive layer 30, according to the product requirements.
Wherein the thickness of the first hardened coating 20 after curing is 5 to 50 micrometers. The thickness of the first hardened coating 20 before curing can be set according to the actual practice.
Wherein, the step of forming the first hardened coating 20 on the side of the polarizing sublayer 10 away from the pressure-sensitive adhesive layer 30 may comprise: coating a first hardening coating material on the side of the polarizing sublayer 10 away from the pressure-sensitive adhesive layer 30; the first hardened coating material is photo-cured to form a first hardened coating 20. For example, the first hardened coating material is cured by UV light irradiation and/or heating. The cured first hard coat layer 20 has a good surface hardness, and can achieve scratch-proof and waterproof effects to protect the polarizing sublayer 10.
In one embodiment of the present application, the first hardened coating material includes an ultraviolet light-curable glue, particles, and a solvent. The particles are made of one or more of silicon dioxide, acrylic or acrylonitrile-butadiene-styrene plastics, and the solvent is one or more of propylene glycol methyl ether acetate, propylene glycol diacetate, methylene bisacrylamide, N-methyl pyrrolidone, ethyl 3-ethoxypropionate, cyclohexanone and dichloromethane.
Furthermore, in the process of coating the first hardened coating material, the surface of the first hardened coating 20 away from the polarizing sublayer 10 can be a concave-convex surface in at least one mode of imprinting, transfer printing and relief printing, so that the anti-glare effect of the first hardened coating 20 is improved. The imprinting, transferring, and letterpress printing processes are well known to those skilled in the art and will not be described herein.
In an embodiment of the present application, referring also to FIG. 3, the first hardened coating 20 includes a plurality of sub-hardened coatings 210. Specifically, the first hardening coating material may be applied to the side of the polarizing sublayer 10 away from the pressure-sensitive adhesive layer 30 in steps and multiple times to form the multi-layered sub-hardening coating 210.
Wherein each sub-hardened coating 210 has a corresponding reflectivity such that the first hardened coating 20 has a low reflectivity.
The thickness of each sub-hardened coating 210 may be the same or different.
The polarizing plate 100 manufactured by the present application only comprises the polarizing sublayer 10, and the first hardening coating 20 and the pressure sensitive adhesive layer 30 disposed on the two opposite sides of the polarizing sublayer 10, and the film structure is simple. Therefore, the process of manufacturing the polarizing plate 100 is simple, thereby improving the production efficiency.
In another embodiment of the present application, please refer to fig. 2 and 9, fig. 9 is a second flowchart of a method for manufacturing a polarizer 100 according to the present application, the method includes the following steps:
201. a polarizing sublayer 10 is provided.
Specifically, a polyvinyl alcohol film is provided, and the polyvinyl alcohol film is stretched to form the polarizing sublayer 10.
202. The first hardening coating layer 20 is formed on the side of the polarizing sublayer 10 away from the pressure-sensitive adhesive layer 30, while the pressure-sensitive adhesive layer 30 is formed on the polarizing sublayer 10.
It is understood that, referring to fig. 1 as well, the conventional polarizing plate 200 is produced by three-layer-laminating the first transparent protective layer 12, the second transparent protective layer 14, and the polarizing sublayer 10 at a stretching station to form a semi-finished product. The semi-finished product is then transferred to a coating station where a pressure sensitive adhesive layer 30 is coated on the side of the second transparent protective layer 14 remote from the polarizing sublayer 10 to produce a finished product.
In the present embodiment, the stretching station and the coating station are combined together, and the first hardened coating 20 is formed directly on the polarizing sublayer 10 or the first hardened coating 20 is formed on the release film on the existing production path of the second transparent protective layer 14; the pressure sensitive adhesive layer 30 is formed on another release film on the existing manufacturing path of the first transparent protective layer 12. Then, the first hardening coating 20, the pressure-sensitive adhesive layer 30 and the polarizing sublayer 10 are subjected to three-layer composite integral molding at a stretching station to form a finished product, so that the process steps are further reduced.
It should be noted that, in the present application, the process of forming the second hardened coating is the same as the process of forming the first hardened coating, and is not described herein again. In addition, the second hardened coating material forming the second hardened coating is the same as the first hardened coating material, and is not described herein again.
The present application also provides a display panel including a polarizing plate. The polarizing plate is the one described in any of the above embodiments, and will not be described herein again. Wherein the display panel may be an LCD display panel or an OLED display panel.
When the display panel is an LCD display panel, the upper and lower sides of the display panel are respectively provided with an upper polarizing plate and a lower polarizing plate. The lower polarizing plate is used for converting light beams generated by the backlight source into polarized light, and the upper polarizing plate is used for analyzing the polarized light after being electrically modulated by the liquid crystal to generate light and shade contrast, so that a display picture is generated. When the display panel is an OLED display panel, a polarizer is disposed on the light-emitting surface of the display panel to prevent the screen of the display panel from reflecting light.
The application provides a display panel, and the display panel comprises a polarizing plate, wherein the polarizing plate comprises a polarizing sublayer, a first hardening coating and a pressure-sensitive adhesive layer. The embodiment of the application directly coats first hardening coating and pressure sensitive adhesive layer on two surfaces that polarisation sublayer is relative for first hardening coating plays protective layer and function coating's effect simultaneously, and pressure sensitive adhesive layer plays the effect of protection polarisation sublayer, thereby has simplified the membranous layer structure of polaroid, does benefit to display panel's frivolousization.
The polarizing plate, the method for manufacturing the polarizing plate, and the display panel provided in the present application are described in detail above, and specific examples are applied herein to illustrate the principle and the implementation manner of the present application, and the description of the above examples is only used to help understanding the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (13)
1. A polarizing plate, comprising:
a polarizing sublayer;
a first hardened coating disposed on the polarizing sublayer; and
and the pressure-sensitive adhesive layer is arranged on one side of the polarizing sublayer, which is far away from the first hardening coating.
2. The polarizing plate of claim 1, further comprising:
the first adhesive layer is arranged on one side, close to the pressure-sensitive adhesive layer, of the polarizing sublayer;
the first protective layer is arranged on one side, close to the pressure-sensitive adhesive layer, of the first adhesive layer.
3. The polarizing plate of claim 1, further comprising a second hardening coating disposed between the polarizing sublayer and the pressure-sensitive adhesive layer.
4. The polarizing plate of claim 1, wherein the first hardening coating comprises at least one sub-hardening coating, each of the sub-hardening coatings having a corresponding reflectivity.
5. The polarizing plate of claim 1, wherein a surface of the first hardening coating layer away from the polarizer sublayer is a concave-convex surface.
6. The polarizing plate of claim 1, wherein the thickness of the first hardening coating is 5 to 50 μm.
7. The polarizing plate of claim 1, wherein the first hardening coating comprises one or more particles of silicon dioxide, acryl, or acrylonitrile-butadiene-styrene plastic.
8. The polarizing plate of claim 7, wherein the particles have a particle size of 5 to 20 μm.
9. A method for manufacturing a polarizing plate, comprising:
providing a polarizing sublayer;
forming a pressure-sensitive adhesive layer on the polarizing sublayer;
and forming a first hardening coating on one side of the polarizing sublayer far away from the pressure-sensitive adhesive layer.
10. The method of manufacturing the polarizing plate according to claim 9, wherein the first hardening coating is formed on a side of the polarizing sublayer away from the pressure-sensitive adhesive layer while the pressure-sensitive adhesive layer is formed on the polarizing sublayer.
11. The method of manufacturing a polarizing plate according to claim 9, wherein the forming of the first hardening coating on the side of the polarizing sublayer away from the pressure-sensitive adhesive layer comprises:
coating a first hardening coating material on one side of the polarizing sublayer, which is far away from the pressure-sensitive adhesive layer;
photocuring the first hardened coating material to form the first hardened coating;
the first hardening coating material comprises ultraviolet light curing glue, particles and a solvent, the particles are made of one or more of silicon dioxide, acrylic or acrylonitrile-butadiene-styrene plastics, and the solvent is one or more of propylene glycol methyl ether acetate, propylene glycol diacetate, methylene bisacrylamide, N-methyl pyrrolidone, ethyl 3-ethoxypropionate, cyclohexanone and dichloromethane.
12. The method of manufacturing a polarizing plate according to claim 11, wherein a mass ratio of the particles to the solvent is 0.1% to 5%.
13. A display panel comprising the polarizing plate according to any one of claims 1 to 8.
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Application publication date: 20210706 |