UTG composite polaroid

Abstract

The utility model 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 liquid crystal displays must rely on polarized light. All liquid crystals have two polarizing films in front and back tightly attached to the liquid crystal glass, forming a liquid crystal film with a total thickness of about 1mm.

[0003] The traditional display screen consists of a cover glass layer, a polarizer layer, a PSA adhesive layer, an LCD cell layer, a PSA adhesive layer, and a polarizer layer, while the polarizer structure consists of a triacetate cellulose film layer, an adhesive layer, a polyvinyl alcohol film layer, an adhesive layer, a triacetate cellulose film layer, and a pressure-sensitive adhesive layer. Figure 1 、 2 shown.

[0004] Polarizers are trending towards thinness, lightness, and TAC-free design. OLED polarizers are also trending towards thinness, lightness, and TAC-free design. They are primarily used in foldable screen designs because the screen must be as thin as possible to minimize the bending radius.

[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 existing technology, 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 having good foldability. During the processing step, the cover glass and the polarizer can be directly combined, eliminating the OCA glue material and the bonding process in the bonding process, reducing the product cost, and having a high water vapor barrier rate, excellent RA reliability, excellent optical performance, high transmittance, and good scalability to meet various special needs and expansions.

[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 μm, 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 such that: 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 such that the protective film layer material comprises one of a TAC film, a PMMA film, a COP film, and a light-curable resin.

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

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

[0014] Combining the UTG cover plate with the polarizer 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 foldability. During the processing step, the cover glass and the polarizer can be directly combined, eliminating the OCA glue material and the bonding process, reducing product costs, and having high water vapor barrier rate, excellent RA reliability, excellent optical performance, high transmittance, and good scalability to meet various special needs and expansion. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0017] Figure 3 It is a structural diagram 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. Triacetyl 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 will be further described in detail below with reference to the accompanying drawings.

[0020] A UTG composite polarizer, such as Figure 3As 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 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] Example 1:

[0026] The surfaces of 30um UTG and 25um TAC films were respectively coated with 3um thick UV curing glue, 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 produce UTG composite polarizer.

[0027] Example 2:

[0028] The surfaces of the 30um UTG and 13um COP films were respectively coated with 3um thick UV curing glue, 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 produce the UTG composite polarizer.

[0029] Example 3:

[0030] The surface of 30um UTG is coated with 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 with a thickness of 5um. After secondary photocuring, a 20um thick PSA glue is coated on the photocurable resin layer to produce a UTG composite polarizer.

[0031] Comparative Example 1:

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

[0033] The above-mentioned PVA films were all 13 μm PVA films prepared 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 inward folds Outer fold radius Number of outward folds 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 the polarizer product structure reducing a layer of TAC film and the display panel reducing a layer of OCA glue, so that the product thickness is reduced and the foldability is good; in the processing process, the cover glass and the polarizer can be directly combined, eliminating the OCA glue material and the bonding process 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 scalability, 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 replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A UTG composite polarizer, characterized by: 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 sequentially stacked 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, wherein: 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 one of AG, AR, LR, AS, and HC.

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

5. The UTG composite polarizer according to claim 1, wherein: The material of the protective film layer (11) includes one of a TAC film, a PMMA film, a COP film, and a light-curing resin.

6. The UTG composite polarizer according to claim 1, wherein: The adhesive layer (6) has a thickness of 1-5 μm.

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