EB glue polaroid and curing mode thereof

Abstract

The invention discloses an EB adhesive polaroid and a curing mode thereof, and belongs to the field of polaroids, and the EB adhesive polaroid is characterized by comprising a PET protective film layer, a first protective film layer, an electron beam curing adhesive layer, a PVA layer, an electron beam curing adhesive layer, a second protective film layer, a pressure-sensitive adhesive layer and a release film layer which are sequentially stacked from top to bottom, the method has the advantages that electron beam curing is adopted as a curing mode, under the condition that the curing efficiency and the occupied space of equipment are similar to those of UV curing, the curing rate of the interlayer adhesive is increased to 99% or above, and residues are reduced.

Description

Technical Field

[0001] The present application relates to the field of polarizers, and more specifically to an EB glue polarizer and a curing method thereof. 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] At present, the interlayer glue used in conventional polarizers is thermosetting water glue, such as Figure 1 As shown, the curing method requires a long curing time, the equipment occupies a large space, and the production efficiency is low; the new generation of interlayer glue is UV curing glue, such as Figure 2 As shown, the curing efficiency is high, the equipment occupies a small space, and the production efficiency is high, but the curing rate of UV curing is generally around 70-90%, and about 10-30% of residual monomers will precipitate.

[0004] In view of this, the inventors designed a polarizer formed by curing EB glue. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an EB glue polarizer and a curing method thereof, which has the advantage of using electron beam curing as the curing method, and under the conditions that the curing efficiency and equipment space occupied are similar to those of UV curing, the curing rate of the interlayer glue is increased to more than 99%, thereby reducing residue.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an EB glue polarizer, comprising a PET protective film layer, a first protective film layer, an electron beam cured adhesive layer, a PVA layer, an electron beam cured adhesive layer, a second protective film layer, a pressure-sensitive adhesive layer and a release film layer stacked in sequence from top to bottom.

[0007] The present invention is further configured as follows: the first protective film layer material includes at least one of TAC, COP, PMMA, SRF, and UTG.

[0008] The present invention is further configured as follows: a functional layer is coated on the first protective film layer, and the material of the functional layer includes at least one of AG, AR, LR, AS, and HC.

[0009] The present invention is further configured as follows: the second protective film layer material includes one of a TAC film, a PMMA film, and a COP film.

[0010] A curing method of an EB adhesive polarizer, characterized by comprising the following specific steps:

[0011] S1, subjecting the prepared PVA film to conventional preparation processes such as washing, swelling, dyeing, stretching, correcting, and drying, and obtaining a polarizing film after drying;

[0012] S2, evenly coating the electron beam curing glue on the surface of the protective film layer, laminating it with the element film and then putting it into the electron beam curing device to complete the curing;

[0013] S3. After curing, it is laminated with the PET protective film, and then PSA glue is coated to make an EB glue polarizer.

[0014] The present invention is further configured as follows: the electron energy range of the electron beam curing is 70-300KV, and the curing energy range is 5-100kgy.

[0015] The present invention is further configured as follows: the dyeing method of the PVA layer (4) in step S1 includes one of an iodine dyeing method and a dye dyeing method.

[0016] The present invention is further configured as follows: the electron beam curing method in step S2 is to cure both sides simultaneously.

[0017] In summary, the present invention has the following advantages:

[0018] By using electron beam curing as the curing method, the curing rate of the interlayer adhesive is increased to more than 99% and the residue is reduced under the conditions that the curing efficiency and equipment space occupied are similar to those of UV curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of a polarizer in the prior art;

[0020] Figure 2 It is a schematic diagram of the structure of a polarizer in the prior art;

[0021] Figure 3 It is a structural schematic diagram of this embodiment;

[0022] Figure 4 is a comparison chart of monomer transmittance of the embodiment and the comparative example;

[0023] Figure 5 It is an orthogonal transmittance graph of the example and the comparative example.

[0024] Explanation of the accompanying drawings: 1. PET protective film layer; 2. First protective film layer; 3. Electron beam cured adhesive layer; 4. PVA layer; 5. Electron beam cured adhesive layer; 6. Second protective film layer; 7. Pressure sensitive adhesive layer; 8. Release film layer; 9. Triacetyl cellulose film; 10. Water-based adhesive; 11. Polyvinyl alcohol film; 12. Pressure sensitive adhesive; 13. UV adhesive. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0026] An EB plastic polarizer, such as Figure 3 As shown, it includes a PET protective film layer 1, a first protective film layer 2, an electron beam cured adhesive layer 3, a PVA layer 4, an electron beam cured adhesive layer 5, a second protective film layer 6, a pressure-sensitive adhesive layer 7 and a release film layer 8 which are stacked in sequence from top to bottom.

[0027] The first protective film layer 2 and the second protective film layer 6 are both made of TAC film.

[0028] Furthermore, a functional layer may be coated on the first protective film layer 2, and the material of the functional layer is AG.

[0029] A curing method of EB adhesive polarizer, embodiment 1:

[0030] S1, subjecting the prepared PVA film to conventional preparation processes such as washing, swelling, dyeing, stretching, correcting, and drying, and obtaining a polarizing film after drying;

[0031] S2, evenly coating the electron beam curing glue on the surface of the first protective film layer and the second protective film layer with a thickness of 3±2um, laminating with the element film and curing in the electron beam curing device; the curing method is to cure both sides at the same time, and the curing energy is set to 80Kv, 60Kgy;

[0032] S3. After curing, it is laminated with the PET protective film, and then PSA glue is coated to make an EB glue polarizer.

[0033] A curing method of EB adhesive polarizer, embodiment 2:

[0034] S1, subjecting the prepared PVA film to conventional preparation processes such as washing, swelling, dyeing, stretching, correcting, and drying, and obtaining a polarizing film after drying;

[0035] S2, evenly apply the electron beam curing glue on the surface of the first protective film layer and the second protective film layer with a thickness of 3±2um, and after laminating with the element film, complete the curing in the electron beam curing device; the curing method is to cure both sides at the same time, and the curing energy is set to 100Kv 40Kgy;

[0036] S3. After curing, it is laminated with the PET protective film, and then PSA glue is coated to make an EB glue polarizer.

[0037] Comparative Example 1:

[0038] S1, subjecting the prepared PVA film to conventional preparation processes such as washing, swelling, dyeing, stretching, correcting, and drying, and obtaining a polarizing film after drying;

[0039] S2. Evenly apply the electron beam curing glue on the surface of the first protective film layer and the second protective film layer with a thickness of 3±2um, and after laminating with the element film, cure in the electron beam curing device; the curing method is to cure both sides simultaneously, and the curing energy is set to 200KV 20KGY;

[0040] S3. After curing, it is laminated with the PET protective film, and then PSA glue is coated to make an EB glue polarizer.

[0041] Comparative Example 2:

[0042] S1, subjecting the prepared PVA film to conventional preparation processes such as washing, swelling, dyeing, stretching, correcting, and drying, and obtaining a polarizing film after drying;

[0043] S2. Apply the water glue evenly on the surface of the element with a thickness of 1um, and then laminate it with the first protective film layer and the second protective film layer and put it into the oven to complete the curing; the curing method is to cure both sides at the same time;

[0044] S3. After curing, it is laminated with the PET protective film, and then PSA glue is coated to make a conventional water-based polarizer.

[0045] The above examples and comparative examples were subjected to comparative tests under the same conditions. Figure 4 , 5 As shown in the following table:

[0046] Single transmittance Orthogonal transmittance Degree of Polarization Example 1 41.64％ 0.011％ 99.97％ Example 2 41.81％ 0.047％ 99.87％ Comparative Example 1 43.60％ 0.098％ 99.73％ Comparative Example 2 41.48％ 0.008％ 99.98％

[0047] The working process and beneficial effects of the present invention are as follows:

[0048] By adopting a structural layout of a PET protective film layer, a first protective film layer, an electron beam cured adhesive layer, a PVA layer, an electron beam cured adhesive layer, a second protective film layer, a pressure-sensitive adhesive layer and a release film layer stacked in sequence from top to bottom, and simultaneously curing both sides in an electron beam curing device, the curing rate of the interlayer adhesive can be increased to more than 99% and residue can be reduced while the curing efficiency and the equipment space occupied are similar to those of UV curing.

[0049] 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. An EB plastic polarizer, characterized in that: The invention comprises a PET protective film layer (1), a first protective film layer (2), an electron beam cured adhesive layer (3), a PVA layer (4), an electron beam cured adhesive layer (5), a second protective film layer (6), a pressure-sensitive adhesive layer (7) and a release film layer (8) which are stacked in sequence from top to bottom.

2. The EB adhesive polarizer according to claim 1, characterized in that: The material of the first protective film layer (2) includes at least one of TAC, COP, PMMA, SRF and UTG.

3. The EB adhesive polarizer according to claim 2, characterized in that: A functional layer is coated on the first protective film layer (2), and the material of the functional layer includes at least one of AG, AR, LR, AS, and HC.

4. The EB adhesive polarizer according to claim 1, characterized in that: The material of the second protective film layer (6) includes one of a TAC film, a PMMA film and a COP film.

5. A curing method for an EB adhesive polarizer according to any one of claims 1 to 4, characterized in that: The specific steps include: S1, subjecting the prepared PVA film to conventional preparation processes such as washing, swelling, dyeing, stretching, correcting, and drying, and obtaining a polarizing film after drying; S2, evenly coating the electron beam curing glue on the surface of the protective film layer, laminating it with the element film and then putting it into the electron beam curing device to complete the curing; S3. After curing, it is laminated with the PET protective film, and then PSA glue is coated to make an EB glue polarizer.

6. The curing method of the EB adhesive polarizer according to claim 5, characterized in that: The electron energy range of the electron beam curing is 70-300 KV, and the curing energy range is 5-100 kgy.

7. The curing method of the EB adhesive polarizer according to claim 5, characterized in that: The dyeing method of the PVA layer (4) in step S1 includes one of an iodine dyeing method and a dye dyeing method.

8. The curing method of the EB adhesive polarizer according to claim 5, characterized in that: The electron beam curing method in step S2 cures both sides simultaneously.

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