UTG composite polaroid

Abstract

The invention discloses an UTG composite polaroid, and belongs to the technical field of polaroids, the UTG composite polaroid is characterized by comprising a PET protective film layer, an UTG material layer, an adhesive layer, a polyvinyl alcohol film layer, a protective film layer, a pressure-sensitive adhesive layer and a release film layer which are sequentially stacked from top to bottom, and the thickness of the UTG material layer is 10-70 [mu] m. According to the display panel, one layer of OCA glue is reduced, the product thickness is reduced, the foldability is good, the cover plate glass and the polaroid can be directly combined in the processing procedure, the OCA glue material and the laminating procedure in the laminating process are omitted, the product cost is reduced, and the display panel has the advantages of high water vapor barrier rate, excellent RA reliability, excellent optical performance, high transmittance, good expansibility and the like. And the expansion effect of various special requirements is met.

Description

Technical Field

[0001] The present application relates to the technical field of polarizers, and more specifically to a UTG composite polarizer. Background Art

[0002] The full name of polarizer is polarizing film. The imaging of LCD must rely on polarized light. All liquid crystals have two polarizing films in the front and back attached to the liquid crystal glass, forming a liquid crystal film with a total thickness of about 1mm.

[0003] The traditional display screen includes the cover glass layer, polarizer layer, PSA adhesive layer, LCD cell layer, PSA adhesive layer, polarizer layer from top to bottom, while the polarizer structure includes triacetyl cellulose film layer, adhesive layer, polyvinyl alcohol film layer, adhesive layer, triacetyl cellulose film layer, and pressure-sensitive adhesive layer from top to bottom. Figure 1 , 2 shown.

[0004] Polaroids are trending towards thinness, lightness and non-TAC, and OLED polaroids are also trending towards thinness, lightness and non-TAC. The low localization rate and high reliance on imports in the fields of high-end IT, Mobile, and OLED polaroids are the pain points of the current domestic polaroid industry. Especially in high-end IT and Mobile products, the reliance on imports exceeds 90%; they are first used in the design of folding screens, mainly because the screen must be as thin as possible to reduce the bending radius during the bending process.

[0005] Therefore, the relatively thick polarizer has become one of the problems that need to be solved for the further development of foldable screens. In addition, the existing panel process generally involves laminating the display panel with a polarizer, and then adding a cover glass through full lamination / frame lamination to form the final panel product, which involves relatively complicated processes. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a UTG composite polarizer, which has the advantages that it can reduce a layer of TAC film in the polarizer product structure and a layer of OCA glue in the display panel, thereby reducing the product thickness and improving the foldability. In the processing step, the cover glass and the polarizer can be directly combined, eliminating the OCA glue material and the bonding step in the bonding process, thereby reducing the product cost. It also has high water vapor barrier rate, excellent RA reliability, excellent optical performance, high transmittance, good expandability, and can meet various special needs.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a UTG composite polarizer, characterized in that it includes a PET protective film layer, a UTG material layer, an adhesive layer, a polyvinyl alcohol film layer, a protective film layer, a pressure-sensitive adhesive layer, and a release film layer stacked in sequence from top to bottom, the UTG material layer has a thickness of 10-70um, and the adhesive layer has a thickness of 1-15um.

[0008] The present invention is further configured as follows: the thickness of the UTG material layer is preferably 10-30 um, and a functional layer is coated on the UTG material layer, and the functional layer is any one or more of AG, AR, LR, AS, HC, etc.

[0009] The present invention is further configured as follows: the dyeing method of the polyvinyl alcohol film layer includes one of an iodine dyeing method and a dye dyeing method.

[0010] The present invention is further configured such that: the adhesive layer includes one of PVA water-based glue and UV curing glue.

[0011] The present invention is further configured as follows: the protective film layer material includes one of a TAC film, a PMMA film, a COP film, and a photocurable resin.

[0012] The present invention is further configured as follows: the thickness of the adhesive layer is 1-5 um

[0013] In summary, the present invention has the following advantages:

[0014] Composite the UTG cover plate with the polarizer can reduce one layer of TAC film in the polarizer product structure and one layer of OCA glue in the display panel, thereby reducing the product thickness and improving the foldability. During the processing step, the cover glass and the polarizer can be directly combined, eliminating the OCA glue material and bonding steps in the bonding process, thereby reducing the product cost. It also has high water vapor barrier rate, excellent RA reliability, excellent optical performance, high transmittance, and good expandability, which can meet various special needs and expansions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a display screen in the prior art;

[0016] Figure 2 It is a schematic diagram of the structure of a polarizer in the prior art;

[0017] Figure 3 It is a schematic diagram of the structure of this embodiment.

[0018] Explanation of the accompanying drawings: 1. cover glass layer; 2. polarizer layer; 3. PSA adhesive layer; 4. LCD cell layer; 5. triacetate cellulose film layer; 6. adhesive layer; 7. polyvinyl alcohol film layer; 8. pressure-sensitive adhesive layer; 9. PET protective film layer; 10. UTG material layer; 11. protective film layer; 12. release film layer. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0020] A UTG composite polarizer, such as Figure 3 As shown, it includes a PET protective film layer 9, a UTG material layer 10, an adhesive layer 6, a polyvinyl alcohol film layer 7, a protective film layer 11, a pressure-sensitive adhesive layer 8, and a release film layer 12 which are stacked in sequence from top to bottom. The thickness of the UTG material layer 10 is 10-70um, and the thickness of the adhesive layer 6 is 5um.

[0021] A functional layer is coated on the UTG material layer 10, and the material of the functional layer is AG.

[0022] The polyvinyl alcohol film layer 7 is dyed by dyeing.

[0023] The adhesive layer 6 is preferably PVA water glue.

[0024] The protective film layer 11 is preferably a TAC film.

[0025] Embodiment 1:

[0026] The surfaces of 30um UTG and 25um TAC films were coated with 3um thick UV curing glue respectively, and the coated UTG and TAC films were compounded with the PVA film after stretching, dyeing and curing. After UV curing, 20um thick PSA glue was coated on the TAC film side to obtain a UTG composite polarizer.

[0027] Embodiment 2:

[0028] The surfaces of the 30um UTG and 13um COP films were coated with 3um thick UV curing glue respectively, and the coated UTG and COP films were compounded with the PVA film after stretching, dyeing and curing. After UV curing, 20um thick PSA glue was coated on the COP film side to obtain the UTG composite polarizer.

[0029] Embodiment 3:

[0030] The surface of the 30um UTG is coated with a 3um thick UV curing glue, and the coated UTG is compounded with the stretched, dyed and cured PVA film. After UV curing, a photocurable resin is coated on the PVA film side. The thickness of the photocurable resin is 5um. After secondary photocuring, a 20um thick PSA glue is coated on the photocurable resin layer to obtain a UTG composite polarizer.

[0031] Comparative Example 1:

[0032] The 25um TAC film is compounded with the 25um TAC film by PVA water glue and the PVA film after stretching and dyeing. After thermal curing, 20um thick PSA glue is coated on one side of the TAC film to make a conventional polarizer. On the side of the conventional polarizer without PSA glue, 50um thick OCA glue and 30um UTG are compounded to make a traditional cover plate + polarizer structure.

[0033] The above-mentioned PVA films are all 13um PVA films made under the same conditions.

[0034] The above examples and comparative examples were compared under the same conditions, and the results are as follows:

[0035] Effective thickness Inward bending radius Number of inner folds Outer fold radius Outward fold times Example 1 94um R6 150,000 R8 150,000 Example 2 82um R5 200,000 R7 200,000 Example 3 71um R2 200,000 R5 200,000 Comparative Example 1 163um R7 100,000 R10 100,000

[0036] It can be seen from the above table that by adopting the technology of the present invention, the performance can be greatly improved, which has obvious advantages.

[0037] The working process and beneficial effects of the present invention are as follows: This technology can compound the UTG cover plate and the polarizer, resulting in a reduction of one layer of TAC film in the polarizer product structure and a reduction of one layer of OCA glue in the display panel, thereby reducing the product thickness and improving foldability; in the processing step, the cover glass and the polarizer can be directly combined, eliminating the OCA glue material and the bonding step in the bonding process, thereby reducing the product cost, and making the UTG composite polarizer have a high water vapor barrier rate, excellent RA reliability, excellent optical performance, high transmittance, and good expandability, thereby meeting various special needs and expansions.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A UTG composite polarizer, characterized in that: The invention comprises a PET protective film layer (9), a UTG material layer (10), an adhesive layer (6), a polyvinyl alcohol film layer (7), a protective film layer (11), a pressure-sensitive adhesive layer (8), and a release film layer (12) which are stacked in sequence from top to bottom. The thickness of the UTG material layer (10) is 10-70 μm, and the thickness of the adhesive layer (6) is 1-15 μm.

2. The UTG composite polarizer according to claim 1, characterized in that: The UTG material layer (10) has a thickness of 10-30 μm, and a functional layer is coated on the UTG material layer (10), wherein the material of the functional layer comprises at least one of AG, AR, LR, AS, and HC.

3. The UTG composite polarizer according to claim 1, characterized in that: The dyeing method of the polyvinyl alcohol film layer (7) includes one of an iodine dyeing method and a dye dyeing method.

4. The UTG composite polarizer according to claim 1, characterized in that: The adhesive layer (6) comprises one of PVA water glue and UV curing glue.

5. The UTG composite polarizer according to claim 1, characterized in that: The material of the protective film layer (11) comprises one of a TAC film, a PMMA film, a COP film and a photocurable resin.

6. The UTG composite polarizer according to claim 1, characterized in that: The adhesive layer (6) has a thickness of 1-5 um.

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