WO2020192211A1

WO2020192211A1 - Polarizer and manufacture methods therefor

Info

Publication number: WO2020192211A1
Application number: PCT/CN2019/128330
Authority: WO
Inventors: 俞刚; 吴梓平; 李玎
Original assignee: 惠州市华星光电技术有限公司
Priority date: 2019-03-26
Filing date: 2019-12-25
Publication date: 2020-10-01
Also published as: CN109946783A

Abstract

Disclosed are a polarizer (20) and manufacture methods therefor. The polarizer (20) comprises: a polarizing sublayer (23), and a hardened coating (2) disposed on and in direct contact with the polarizing sublayer (23). Disclosed is a manufacture method for the polarizer (20) comprising: S10: providing a polarizing sublayer (23); S20: attaching a hardened coating material to the upper surface of the polarizing sublayer (23) so as to form a hardened coating (2); S30: providing a phase difference plate (24), and attaching the phase difference plate (24) to the lower surface of the polarizing sublayer (23) coated with the hardened coating (2) by using a glue so as to form a glue layer (23a) located between the polarizing sublayer (23) and the phase difference plate (24), thereby obtaining a polarizer (20). Disclosed is another manufacture method for the polarizer (20) comprising: S11: providing a polarizing sublayer (23); S21: providing a phase difference plate (24), and attaching the phase difference plate (24) to the lower surface of the polarizing sublayer (23) by using a glue so as to form a glue layer (23a) between the polarizing sublayer (23) and the phase difference plate (24); and S31: attaching a hardened coating material to the upper surface of the polarizing sublayer (23) attached with the phase difference plate (24) so as to form a hardened coating (2), thereby obtaining a polarizer (20).

Description

Polarizing plate and manufacturing method thereof

Technical field

The invention relates to a polarizing plate and a manufacturing method thereof, in particular to a polarizing plate with a simplified material structure and a manufacturing method thereof.

Background technique

The structure of the polarizer 10 material commonly used in the industry is shown in Figure 1, including: a surface treatment layer 11, a first protective layer 12, a first glue layer 12a, a polarizing sublayer film 13, a second glue layer 12b, and a retardation layer 14. And the pressure-sensitive adhesive layer 15. Wherein, the surface treatment layer 11 is a layer of resin material coated on the first protective layer 12, which has been processed for some specific functions, including at least one of the following: anti-glare (AG) treatment, hardening (HC) treatment, Low reflection (LR) treatment, and anti-reflection (AR) treatment, etc. The conventional first protective layer 12 is generally a resin film, including: cellulose triacetate (TAC) and/or ethylene terephthalate (PET). The commonly used polarizer film 13 is generally a processed polyvinyl alcohol (PVA) film. Currently, the retardation layer 14 commonly used in the industry is generally a resin film, including: cellulose triacetate (TAC) and/or acrylic resin (PMMA) and/or polyethylene terephthalate (PET). The pressure-sensitive adhesive layer 15 is generally acrylic resin.

Due to the limitations of the conventional process, technology, and material characteristics, the surface treatment layer in this structure needs to be coated on the surface of the first protective layer, and then attached to both sides of the polarizer together with the second protective layer to protect and coat Related functions of the layer.

Accordingly, research and development of a polarizer with a new structure to reduce material usage, simplify material structure, reduce costs, and achieve a lighter and thinner polarizer is what the industry needs.

technical problem

Technical solutions

The present invention proposes a polarizing plate in which a hardened coating is directly coated on the polarizing sub-layer to simultaneously play the role of protection and/or functional coating, eliminating the need for the surface treatment layer and a layer of the polarizing plate in the past. The glue layer reduces the use of materials and simplifies the manufacturing process to obtain a polarizing plate with a relatively simple material structure. In addition to reducing costs, it is easier to achieve lightness and thinness.

In view of this, the present invention provides a method for manufacturing a polarizing plate, including: S10 providing a polarizing sub-layer; S20 attaching a hardened coating material to the upper surface of the polarizing sub-layer to form a hardened coating; S30 A phase difference plate is provided, and the phase difference plate is attached to the lower surface of the polarizing sub-layer coated with the hard coating by using a glue to form a glue layer located on the polarizing sub-layer and the Between the phase difference plates, the polarizing plate is obtained.

The present invention also provides another method for manufacturing a polarizing plate, including: S11 provides a polarizer layer; S21 provides a phase difference plate, using a glue to attach the phase difference plate to the lower surface of the polarizer layer , Forming a glue layer between the polarizing sub-layer and the retardation plate; and S31 attaching a hardened coating material to the upper surface of the polarizing sub-layer that has been attached to the retardation plate to form a The coating is hardened to obtain the polarizing plate.

In an embodiment of the present invention, step S20 further includes: after the hardened coating material is attached to the upper surface of the polarizing sublayer, a curing process is performed on the hardened coating material to form a hardened coating material. Layer, wherein the curing method includes at least one of the following: UV light irradiation and heating.

In an embodiment of the present invention, step S20 further includes: doping scattering particles in the hardened coating material, or in the coating process, by at least one of imprinting, transfer, and relief printing, The hardened coating has an uneven surface.

In an embodiment of the present invention, the hardened coating material includes at least one of a photocurable polymer, a thermally cured polymer, UV glue, and silicon oxide, and the hardened coating material is undergoing the curing process. The thickness before treatment is 0.5-500um, and the thickness of the hardened coating material after the curing treatment is 0.5-150um.

Through the manufacturing method of the polarizing plate, the present invention provides a polarizing plate, including: a polarizing sub-layer; and a hardened coating layer on the polarizing sub-layer and directly in contact with the polarizing sub-layer.

In an embodiment of the present invention, the polarizing plate further includes: a glue layer located under the polarizing sublayer; a phase difference plate located under the glue layer; and a pressure-sensitive adhesive layer located under the glue layer. Under the phase difference plate.

Beneficial effect

Description of the drawings

In order to explain the embodiments or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely inventions For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the structure of a conventional polarizing plate.

2 is a structural flowchart of a method for manufacturing a polarizing plate according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a polarizing plate structure according to an embodiment of the present invention.

4 is a structural flowchart of a method for manufacturing a polarizing plate according to another embodiment of the present invention.

Embodiments of the invention

In order to make the above-mentioned content of the present invention more obvious and understandable, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

The description of the following embodiments refers to the attached drawings to illustrate specific embodiments that the present invention can be implemented. The directional terms mentioned in the present invention, such as [vertical], [horizontal], [top], [bottom], [front], [back], [left], [right], [inside], [outside], [Side], etc., only refer to the direction of the attached drawings. Therefore, the directional terms used are used to describe and understand the present invention, rather than to limit the present invention. In the figure, units with similar structures are indicated by the same reference numerals.

In this article, the terms first, second, third, etc., are used to describe various components, components, regions, layers, and/or blocks. But these components, components, regions, layers and/or blocks should not be limited by these terms. These terms are limited to identifying single components, components, regions, layers and/or blocks. Therefore, a first component, component, region, layer and/or block in the following can also be referred to as a second component, component, region, layer and/or block without departing from the intent of the present invention. As used herein, the term "and/or" includes any combination of one or more of the listed associated items. The "and/or" mentioned in the document of this case refers to any, all or any combination of at least one of the listed components.

The present invention proposes a polarizing plate. The hardened coating is directly coated on the polarizing sub-layer to simultaneously play the role of protection and functional coating, eliminating the need for the surface treatment layer and a layer of glue layer in the polarizing plate in the past , Reduce the use of materials and simplify the manufacturing process, and obtain a polarizing plate with a relatively simple material structure. In addition to reducing costs, it is easier to achieve lightness and flexibility. .

2 is a structural flowchart of a method for manufacturing a polarizer according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a structure of a polarizer according to an embodiment of the present invention. Specifically, as shown in FIGS. 2 and 3, the present invention provides a method for manufacturing a polarizing plate, including: S10 provides a polarizer layer 23; S20 attaches a hardened coating material to the polarizer layer 23 On the upper surface, a hardened coating 2 is formed; S30 provides a phase difference plate 24, and uses a glue to attach the phase difference plate 24 to the bottom of the polarizing sub-layer 23 coated with the hardened coating 21 On the surface, a glue layer 22a is formed between the polarizing sub-layer 23 and the retardation plate 24 to obtain the polarizing plate 20.

4 is a structural flowchart of a method for manufacturing a polarizing plate according to another embodiment of the present invention. Specifically, as shown in FIGS. 3 and 4, the present invention also provides another method for manufacturing a polarizing plate, including: S11 provides a polarizing sub-layer 23; S21 provides a phase difference plate 24, using a glue to The retardation plate 24 is attached to the lower surface of the polarizing sub-layer 23 to form a glue layer 23a between the polarizing sub-layer 23 and the retardation plate 24; and S31 is to attach a hardened coating material to the The upper surface of the polarizing sub-layer 23 of the phase difference plate 24 is bonded to form a hardened coating 21 to obtain the polarizing plate 20.

In an embodiment of the present invention, step S20 further includes: after the hardened coating material is attached to the upper surface of the polarizing sub-layer 23, a curing treatment is performed on the hardened coating material to form a hardened coating material. Coating 21, wherein the curing method includes at least one of the following: UV light irradiation and heating.

In an embodiment of the present invention, step S20 further includes: doping scattering particles in the hardened coating material, or in the coating process, by one or more of imprinting, transfer printing, and letterpress printing The combination method makes the hardened coating have an uneven surface. After curing, the hardened coating has good surface hardness, which can achieve the effects of scratch resistance and waterproofing, so as to protect the polarizing layer film; and by creating unevenness on the outer surface of the hardened coating The state of the polarizer AG is given anti-glare and scratch resistance functions.

Specifically, referring to FIG. 2, the present invention provides a polarizing plate 20 according to the manufacturing method of the polarizing plate provided in the above-mentioned embodiment, including: a polarizing sub-layer 23; and a hardened coating 21 on the polarizing plate. The sub-layer 23 is in direct contact with the polarizing sub-layer 23.

Continuing to refer to FIG. 2, in an embodiment of the present invention, the polarizing plate 20 further includes: a glue layer 23a located under the polarizing sub-layer 23; and a phase difference plate 24 located under the glue layer 23a And a pressure-sensitive adhesive layer 25, located under the phase difference plate 24.

In an embodiment of the present invention, the polarizer layer 23 includes polyvinyl alcohol (PVA).

In summary, the present invention proposes a polarizing plate in which a hardened coating is directly coated on the polarizer layer to simultaneously play the role of protection and functional coating, eliminating the need for the surface treatment layer in the polarizing plate in the past And a layer of glue, which reduces the use of materials and simplifies the manufacturing process to obtain a polarizing plate with a relatively simple material structure. In addition to reducing costs, it is easier to achieve lightness and flexibility.

Although the present invention has been described in conjunction with its specific embodiments, it should be understood that many alternatives, modifications and changes will be apparent to those skilled in the art. Therefore, it is intended to include all substitutions, modifications and changes that fall within the scope of the appended claims.

Claims

A polarizing plate, including:

A polarizing sublayer; and

A hardened coating is located on the polarizing sublayer and is in direct contact with the polarizing sublayer.
The polarizing plate according to claim 1, further comprising:

A glue layer, located under the polarizer layer;

A phase difference plate located under the glue layer; and

A pressure-sensitive adhesive layer is located under the phase difference plate.
The polarizing plate according to claim 1, wherein the material of the hardened coating layer includes at least one of a photo-curable polymer, a heat-curable polymer, UV glue, and silicon oxide.
The polarizing plate of claim 1, wherein the hardened coating layer has an uneven surface.
A manufacturing method of a polarizing plate includes:

S10 provides a polarizer layer;

S20 attaching a hardened coating material to the upper surface of the polarizer layer to form a hardened coating;

S30 provides a phase difference plate, uses a glue to attach the phase difference plate to the lower surface of the polarizing sub-layer coated with the hard coating to form a glue layer located on the polarizing sub-layer and the Between the phase difference plates, the polarizing plate is obtained.
The method of manufacturing a polarizing plate according to claim 5, wherein in step S20, the method of attaching the hardened coating material to the upper surface of the polarizing sub-layer includes at least one of the following: transfer, spraying, scraping Coating, spin coating, extrusion, embossing, and letterpress printing.
The method for manufacturing a polarizing plate according to claim 5, wherein step S20 further comprises: after the hardened coating material is attached to the upper surface of the polarizing sub-layer, a curing treatment is performed on the hardened coating material , To form a hardened coating, wherein the curing method includes at least one of the following: UV light irradiation and heating.
The method of manufacturing a polarizing plate according to claim 5, wherein step S20 further comprises:

Scattering particles are doped in the hard coating material, or during the coating process, the hard coating has an uneven surface by at least one of imprinting, transfer printing, and relief printing.
8. The method of manufacturing a polarizing plate according to claim 7, wherein the hardened coating material includes at least one of a photocurable polymer, a thermally cured polymer, UV glue, and silicon oxide, and the hardened coating material The thickness before the curing treatment is 0.5 to 500 um, and the thickness of the hardened coating material after the curing treatment is 0.5 to 150 um.
A manufacturing method of a polarizing plate includes:

S11 provides a polarizing sublayer;

S21 provides a phase difference plate, and uses a glue to attach the phase difference plate to the lower surface of the polarizer layer to form a glue layer between the polarizer layer and the phase difference plate; and

S31 Attach a hardened coating material to the upper surface of the polarizing sub-layer that has been attached to the phase difference plate to form a hardened coating to obtain the polarizing plate.