LCD (liquid crystal display) packaging adhesive tape as well as preparation method and application thereof

Abstract

The invention provides an LCD liquid crystal display packaging adhesive tape and a preparation method and application thereof, and belongs to the technical field of liquid crystal display packaging adhesives. The packaging adhesive tape provided by the invention exists in a solid form, and is directly coated after being unfrozen, so that the early-stage preparation work is not needed, and the viscosity increasing factor does not need to be considered; meanwhile, the packaging adhesive tape provided by the invention is subjected to UV curing in advance, the UV curing process can be eliminated in the whole process, the time is saved, the productivity is increased, the solid adhesive tape exists, the pollution of liquid glue to liquid crystals is avoided, and the pollution problem of the liquid crystals can not be considered. When the packaging adhesive tape is used for packaging, the steps of spacer mixing, defoaming and filling are not needed, only the processes of coating, vacuum box alignment and thermocuring are needed, and the packaging efficiency is greatly improved. In addition, the invention does not need to consider the time for maintaining available construction performance and the problem of liquid crystal pollution, and the adhesive strength and water and oxygen barrier property of the adhesive tape can be easily improved by regulating and controlling the proportion of each resin raw material.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display encapsulation adhesive technology, specifically to an LCD liquid crystal display encapsulation tape, its preparation method, and its application. Background Technology

[0002] ODF (One Drop Fill) is a key encapsulation technology in LCD manufacturing, primarily used to replace traditional vacuum encapsulation. It achieves efficient and uniform cell encapsulation by precisely depositing liquid crystal (LC) and sealant onto a substrate in a single process, followed by bonding another substrate. ODF encapsulation adhesive is the core material of this process, directly impacting the performance and reliability of the LCD display.

[0003] ODF encapsulation adhesives require consideration of four factors: adhesive strength, water and oxygen barrier properties, storage stability, and liquid crystal contamination. Traditional ODF encapsulation adhesives exist in liquid form and need to be sprayed from a device nozzle for application. A typical encapsulation process includes multiple stages such as thawing, mixing spacers, degassing, filling, coating, vacuum alignment, UV curing, and thermal curing. The preparation stages (thawing, mixing spacers, degassing, and filling) are complex and affect production efficiency. Due to the tendency for adhesive breaks and uneven adhesive width during coating, the encapsulation process requires a high viscosity of the liquid adhesive, around 300,000 ppm; otherwise, abnormal adhesive width fluctuations will occur. Furthermore, during UV curing, incomplete curing of the liquid adhesive can occur due to metal wire obstruction, leading to liquid crystal contamination. The high thermal curing temperature (above the liquid crystal clearing point) further exacerbates liquid crystal contamination. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide an LCD encapsulation tape, its preparation method, and its application. The LCD encapsulation tape provided by this invention can significantly shorten the process steps of liquid crystal cell encapsulation and avoid liquid crystal contamination.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] This invention provides an LCD liquid crystal display encapsulation tape, comprising an adhesive film and a release film covering the upper and lower surfaces of the adhesive film;

[0007] The composition of the adhesive film, by weight percentage, includes:

[0008]

[0009]

[0010] Preferably, the acylhydrazine curing agent includes one or more of acylhydrazine curing agents VDH, UDH, MDH and ADH;

[0011] The photoinitiator includes one or more of the free radical photoinitiators OXE02, OXE03, 814, and 127.

[0012] Preferably, the inorganic filler comprises SiO2, and the particle size of the inorganic filler is 500-700 nm;

[0013] The silane coupling agent includes KH560 and / or KH570;

[0014] The spacer is made of polystyrene and / or silicon dioxide.

[0015] Preferably, the thickness of the adhesive film is 3-8 μm; the material of the release film includes PET.

[0016] This invention provides a method for preparing the above-mentioned LCD liquid crystal display encapsulation tape, comprising the following steps:

[0017] A low-boiling-point solvent, hydrazide curing agent, photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, silane coupling agent, inorganic filler, spacer and acrylic microspheres are mixed and filtered to obtain a low-viscosity adhesive.

[0018] The low-tack adhesive is applied to a release film, and then solvent removal, UV curing, cutting, and packaging are performed sequentially to obtain an LCD liquid crystal display encapsulation tape.

[0019] Preferably, the low-boiling-point solvent includes ethyl acetate, and the mass content of the low-boiling-point solvent in the low-viscosity adhesive is 60-80%.

[0020] Preferably, the coating method is microgravure coating;

[0021] The solvent removal temperature is 40–80°C, and the time is 2–5 minutes.

[0022] Preferably, the UV curing wavelength is 330–395 nm, the energy density is 3000–5000 mJ, and the time is ≤1 min.

[0023] This invention provides the application of the above-mentioned LCD liquid crystal display encapsulation tape in LCD liquid crystal display encapsulation.

[0024] This invention provides an LCD liquid crystal display packaging method, comprising the following steps:

[0025] After thawing, the LCD display encapsulation tape is sequentially applied, vacuum-fitted, and heat-cured.

[0026] The LCD liquid crystal display encapsulation tape is the aforementioned LCD liquid crystal display encapsulation tape.

[0027] This invention provides an LCD encapsulation tape, comprising an adhesive film and a release film covering the upper and lower surfaces of the adhesive film. The adhesive film, by weight percentage, comprises: 15-30% bisphenol A epoxy resin; 10-20% acrylic resin; 15-40% epoxy acrylic resin; 10-15% hydrazide curing agent; 0.5-1.5% photoinitiator; 15-25% inorganic filler; 5-10% acrylic microspheres; 0.5-1% silane coupling agent; and 0.5-1% spacers. The encapsulation tape provided by this invention exists in solid form and can be directly coated after thawing, requiring no prior preparation and eliminating the need to consider viscosity growth factors. Furthermore, the encapsulation tape provided by this invention is pre-cured by UV, eliminating the need for a UV curing process, saving time, and increasing production capacity. The presence of the solid tape avoids liquid adhesive contamination of the liquid crystal, thus eliminating concerns about liquid crystal contamination. The LCD encapsulation tape provided by this invention eliminates the need for steps such as mixing spacers, degassing, and filling during encapsulation. It only requires coating, vacuum alignment, and heat curing, which greatly improves encapsulation efficiency.

[0028] Furthermore, traditional liquid adhesives cannot increase their viscosity by more than 1.2 times the initial viscosity within 7 days of maintaining their workability (Potlife); otherwise, coating abnormalities will occur. If the adhesive is mixed with liquid crystal, to achieve a voltage retention rate (VHR) greater than 99%, the adhesive components should be dissolved as little as possible. Due to the limitations of the workability retention time and liquid crystal contamination, the resin ratio adjustment of the encapsulating adhesive is severely restricted, resulting in poor overall performance. However, the LCD encapsulation tape provided by this invention does not need to consider the workability retention time and liquid crystal contamination issues. It is easy to improve the tape's adhesive strength and water / oxygen barrier properties by adjusting the ratio of each resin raw material. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the LCD liquid crystal display encapsulation tape. Detailed Implementation

[0030] This invention provides an LCD liquid crystal display encapsulation tape, comprising an adhesive film and a release film covering the upper and lower surfaces of the adhesive film;

[0031] The composition of the adhesive film, by weight percentage, includes:

[0032]

[0033] In this invention, the adhesive film comprises 15-30% bisphenol A epoxy resin, preferably 20-25%, and specifically 15%, 18%, 20%, 22%, 25%, 28%, or 30% by mass percentage. In this invention, the epoxy equivalent is preferably 160-200, and the viscosity is preferably 10000-3000 Cp. In this invention, the bisphenol A epoxy resin serves to improve adhesive strength and increase formulation rigidity. By controlling the high content of bisphenol A epoxy resin, this invention can provide stronger adhesive strength and water and oxygen barrier properties.

[0034] The film comprises 10-20% acrylic resin, preferably 12-18%, by weight percentage, specifically 10%, 12%, 15%, 18%, or 20%. In this invention, the molecular weight of the acrylic resin is preferably 300,000 to 1,000,000. In this invention, the acrylic resin enables rapid UV curing, avoiding liquid crystal contamination.

[0035] The adhesive film comprises, by weight percentage, 15-40% epoxy acrylate resin, more preferably 20-30%, specifically 15%, 20%, 25%, 30%, 35%, or 40%. In this invention, the epoxy acrylate resin has the following parameters: epoxy value of 300-500 g / mol; double bond content of 5-10 mmol / g; acid value <0.3 mg KOH; and functionality ≥2. In this invention, the epoxy acrylate resin increases crosslinking density, improves adhesive strength and water / oxygen barrier properties, and reduces liquid crystal contamination.

[0036] The adhesive film comprises, by weight percentage, 9-15% of an acylhydrazine curing agent, preferably 12-14%, specifically 9%, 10%, 11%, 12%, 13%, 14%, or 15%. In this invention, the acylhydrazine curing agent includes one or more of VDH, UDH, MDH, and ADH. In this invention, the acylhydrazine curing agent VDH has a medium melting point (100°C), which can improve reactivity and curing rate, ultimately improving the overall performance of the product.

[0037] The composition of the film, by weight percentage, includes 0.5 to 1.5% photoinitiator, preferably 1%. In this invention, the photoinitiator preferably includes one or more of the free radical photoinitiators OXE02, OXE03, 814, and 127.

[0038] The film comprises 15-25% inorganic filler, preferably 20%, by mass percentage. In this invention, the inorganic filler comprises SiO2, and the particle size of the inorganic filler is preferably 500-700 nm, more preferably 700 nm. In this invention, the inorganic filler functions to adjust the thixotropic value and improve the water and oxygen barrier properties of the product.

[0039] The adhesive film comprises 5-10% acrylic microspheres, preferably 6-8%, and specifically 5%, 6%, 7%, 8%, 9%, or 10% by weight. In this invention, the particle size of the acrylic microspheres is preferably 50-100 nm, more preferably 60-80 nm. In this invention, the acrylic microspheres function as a toughening agent to improve the adhesive strength of the product.

[0040] The film comprises 0.5% to 1% silane coupling agent by weight percentage, specifically 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1%. In this invention, the silane coupling agent includes KH560 and / or KH570.

[0041] The film comprises 0.5-1% spacers by weight percentage, more preferably 0.6-0.8%. In this invention, the spacers are preferably made of polystyrene (PS) and / or silica, and the particle size is preferably 3.5 μm.

[0042] In this invention, the thickness of the adhesive film is preferably 3 to 8 μm, more preferably 5 to 6 μm.

[0043] In this invention, the release film is preferably made of PET. The thickness of the release film is preferably 50 μm.

[0044] In this invention, the structural schematic diagram of the LCD liquid crystal display encapsulation tape is as follows: Figure 1 As shown.

[0045] This invention provides a method for preparing the above-mentioned LCD liquid crystal display encapsulation tape, comprising the following steps:

[0046] A low-boiling-point solvent, hydrazide curing agent, photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, silane coupling agent, inorganic filler, spacer and acrylic microspheres are mixed and filtered to obtain a low-viscosity adhesive.

[0047] The low-tack adhesive is coated onto a release film, and then subjected to solvent removal, UV curing, cutting, and packaging to obtain an LCD liquid crystal display encapsulation tape.

[0048] This invention involves mixing a low-boiling-point solvent, an acylhydrazine curing agent, a photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, a silane coupling agent, an inorganic filler, and acrylic microspheres, followed by filtration to obtain a low-viscosity adhesive. In this invention, the low-boiling-point solvent preferably includes ethyl acetate; the mass content of the low-boiling-point solvent in the low-viscosity adhesive is preferably 60-80%, more preferably 70%.

[0049] In this invention, the preferred method is to sequentially add an acylhydrazine curing agent, a photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, a silane coupling agent, an inorganic filler, a spacer, and acrylic microspheres to a low-boiling-point solvent. In this invention, the mixing method is preferably stirring, the stirring time is preferably 45 minutes, and the temperature is preferably room temperature.

[0050] In this invention, the filter pore size used for filtration is preferably 5 μm, the filtration temperature is preferably room temperature, and the filtration is preferably completed within 1 hour. After filtration, the product is preferably filled. In this invention, the viscosity of the low-viscosity adhesive is preferably 3000–8000 cp, more preferably 5000 cp.

[0051] After obtaining the low-viscosity adhesive, the present invention performs coating, solvent removal, UV curing, cutting, and packaging on the low-viscosity adhesive to obtain LCD liquid crystal display encapsulation tape. In the present invention, the coating method is preferably microgravure coating; the solvent removal temperature is 40-80℃, more preferably 60℃; the time is preferably 2-5 min, more preferably 2 min.

[0052] In this invention, the wavelength of the UV curing is preferably 330-395nm, more preferably 365nm, the energy density is preferably 3000-5000mJ, more preferably 3000mJ, and the time is preferably ≤1min, more preferably 50s-1min.

[0053] In this invention, the cutting is preferably done by cutting into rolls. This invention does not have special requirements for the width and length of the cut; the design can be tailored to actual needs. This invention does not have special requirements for the packaging method; packaging methods well-known to those skilled in the art can be used. This invention preferably stores the tape at -20°C.

[0054] This invention provides the application of the above-mentioned LCD liquid crystal display encapsulation tape in LCD liquid crystal display encapsulation.

[0055] This invention provides an LCD liquid crystal display packaging method, comprising the following steps:

[0056] The thawed LCD encapsulation tape is sequentially coated, vacuum-assembled, and heat-cured. In this invention, the vacuum degree of the vacuum assembly is ≤10Pa; the heat-curing temperature is preferably 80-100℃, and the time is preferably 30-40min.

[0057] The following detailed description, in conjunction with embodiments, illustrates the LCD encapsulation tape, its preparation method, and its applications provided by the present invention. However, these descriptions should not be construed as limiting the scope of protection of the present invention.

[0058] Example 1

[0059] LCD liquid crystal display encapsulation tape, including an adhesive film and a release film covering the upper and lower surfaces of the adhesive film;

[0060] The composition of the adhesive film, by weight percentage, includes:

[0061] Bisphenol A epoxy resin 20%;

[0062] 10% acrylic resin;

[0063] Epoxy acrylic resin 31%;

[0064] Acylhydrazide curing agent VDH 10%;

[0065] Photoinitiator OXE02 1%;

[0066] Inorganic filler SiO2, with a particle size of 700nm, 20%;

[0067] 6% acrylic microspheres;

[0068] Silane coupling agent KH560 1%;

[0069] Spacer PS with a particle size of 3.5 μm 1%.

[0070] The method for preparing LCD liquid crystal display encapsulation tape includes the following steps:

[0071] Ethyl acetate, VDH curing agent, OXE02 photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, silane coupling agent, SiO2 inorganic filler, spacers, and acrylic microspheres were stirred and mixed for 45 minutes. The mixture was then filtered through a 5μm membrane at room temperature and filled into the final product in 1 hour to obtain a low-viscosity adhesive with an ethyl acetate concentration of 70%. The entire process, from weighing to adhesive preparation, was completed in 6 hours, using low-viscosity, room-temperature operation.

[0072] The low-viscosity adhesive is applied to the surface of a release film using a microgravure coating process, followed by solvent removal at 40–80°C for 2 minutes, UV curing, cutting, and packaging to obtain an LCD liquid crystal display encapsulation tape. The UV curing wavelength is 365 nm, the energy density is 3000 mJ, and the time is 50 seconds.

[0073] Example 2

[0074] LCD liquid crystal display encapsulation tape, including an adhesive film and a release film covering the upper and lower surfaces of the adhesive film;

[0075] The composition of the adhesive film, by weight percentage, includes:

[0076]

[0077] The method for preparing LCD liquid crystal display encapsulation tape includes the following steps:

[0078] Ethyl acetate, VDH curing agent, OXE02 photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, silane coupling agent, SiO2 inorganic filler, spacers, and acrylic microspheres were stirred and mixed for 45 minutes. The mixture was then filtered through a 5μm membrane at room temperature and filled into the final product in 1 hour to obtain a low-viscosity adhesive with an ethyl acetate concentration of 70%. The entire process, from weighing to adhesive preparation, was completed in 6 hours, using low-viscosity, room-temperature operation.

[0079] The low-viscosity adhesive is applied to the surface of a release film using a microgravure coating process, followed by solvent removal at 40–80°C for 2 minutes, UV curing, cutting, and packaging to obtain an LCD liquid crystal display encapsulation tape. The UV curing wavelength is 365 nm, the energy density is 3000 mJ, and the time is 50 seconds.

[0080] Example 3

[0081] LCD liquid crystal display encapsulation tape, including an adhesive film and a release film covering the upper and lower surfaces of the adhesive film;

[0082] The composition of the adhesive film, by weight percentage, includes:

[0083]

[0084]

[0085] The method for preparing LCD liquid crystal display encapsulation tape includes the following steps:

[0086] Ethyl acetate, VDH curing agent, OXE02 photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, silane coupling agent, SiO2 inorganic filler, spacers, and acrylic microspheres were stirred and mixed for 45 minutes. The mixture was then filtered through a 5μm membrane at room temperature and filled into the final product in 1 hour to obtain a low-viscosity adhesive with an ethyl acetate concentration of 70%. The entire process, from weighing to adhesive preparation, was completed in 6 hours, using low-viscosity, room-temperature operation.

[0087] The low-viscosity adhesive is applied to the surface of a release film using a microgravure coating process, followed by solvent removal at 40–80°C for 2 minutes, UV curing, cutting, and packaging to obtain an LCD liquid crystal display encapsulation tape. The UV curing wavelength is 365 nm, the energy density is 3000 mJ, and the time is 50 seconds.

[0088] Comparative Example 1

[0089] The ingredients in the glue formula include:

[0090]

[0091] The adhesive is prepared as follows: Bisphenol A epoxy resin is mixed with photoinitiator OXE02 and heated to 95°C for 1 hour until clear; the remaining resin and silane coupling agent are added sequentially and stirred at 60°C for 20 minutes; inorganic filler SiO2 and acrylic microspheres are added and stirred at 60°C for 30 minutes to ensure uniform mixing; the temperature is lowered to 40°C, and hydrazide curing agent ADH is added and stirred for 1 hour; the overall weighing and mixing process is completed in 5 hours to obtain the adhesive with a viscosity of 300,000 cP.

[0092] The adhesive undergoes grinding, degassing, filtration, and filling. Grinding involves five steps, adjusted by different grinding gaps and speeds, with a total time of 8 hours. Degassing uses a double planetary degassing method with a vacuum degree <1 kPa, with a single batch of 5 kg completed in four stages, for a total time of 3 hours. Filtration is carried out at 40℃ with 5 μm filter pores, under high pressure, twice, for a total filtration time of 2 hours. Filling is done in 200g / bottle batches (20 kg for 1000 bottles) using vacuum filling, for a total time of 4 hours. Comparative Example 1 shows a total process time of 2–3 days; multiple processes require heat treatment, affecting product quality.

[0093] Performance testing

[0094] (1) The viscosity (cone plate viscometer, 2.5 rpm), thixotropic properties (cone plate viscometer, 0.5 rpm / 5 rpm), viscosity growth rate at room temperature (Potlife) (cone plate viscometer, 2.5 rpm, 7d / 0d), adhesive strength (universal testing machine, pin generator), moisture permeability (constant temperature and humidity chamber and moisture permeation cup, 85℃ 85%RH), Tg, required curing temperature and time of the tapes / adhesives obtained in Example 1 and Comparative Example 1 were tested, and the results are listed in Table 1.

[0095] Table 1. Performance of the tapes / adhesives obtained in Example 1 and Comparative Example 1

[0096] performance Comparative Example 1 Example 1 Example 2 Example 3 Viscosity / cP 300,000 5000 4500 5500 thixotropic 1.0～1.2 1.02 1.01 1.03 Potlife (7d) ＜1.2 ＜1.5 ＜1.5 ＜1.5 Adhesion strength / kgf / cm 2.0 3.0 3.2 2.8 <![CDATA[Water vapor permeability / g / m 2 > 120 50 50 50 Tg / ℃ 100 140 142 135 VHR (Volume Harmfulness) 99.2 98.5 98.2 98.8 Curing temperature / ℃ 120～140 80～100 80～100 80～100 Curing time / min 40～60 30～40 30～40 30～40

[0097] Application examples

[0098] The tape obtained in Example 1 was used for LCD liquid crystal display encapsulation. The specific steps were: thawing → coating → vacuum assembly → heat curing.

[0099] Take the roll of tape out of the -20℃ freezer and let it stand at room temperature for 2 hours. Put the roll of tape into the equipment and apply the required pattern to the colored glass according to the set program (apply, press, peel off the film). Align the TFT glass and the colored glass in a vacuum device (vacuum degree 1Pa) and put them directly into the heating furnace for heat curing.

[0100] The adhesive obtained from Comparative Example 1 was used for LCD liquid crystal display encapsulation. The specific steps were: thawing → degassing (mixing spacers) → potting → coating → vacuum assembly → UV curing → heat curing.

[0101] Remove the adhesive from the -30℃ freezer and let it stand at room temperature for 3 hours. Pour the adhesive into a degassing device, add 1% spacers, and perform planetary vacuum degassing (mix the spacers evenly to remove air bubbles). Take out the stainless steel cup containing the adhesive and place it in a vacuum filling device for bubble-free filling. Load the adhesive into a syringe, attach the syringe to a glue applicator, and apply the desired pattern to the colored glass. Align the TFT glass and the colored glass in a vacuum device (vacuum degree 1 Pa). After UV curing within 5 minutes, place it in a heating oven for heat curing.

[0102] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An LCD liquid crystal display encapsulation tape, characterized in that, Includes an adhesive film and a release film covering the upper and lower surfaces of the adhesive film; The composition of the adhesive film, by weight percentage, includes:

2. The LCD liquid crystal display encapsulation tape according to claim 1, characterized in that, The acylhydrazine curing agent includes one or more of the acylhydrazine curing agents VDH, UDH, MDH and ADH; The photoinitiator includes one or more of the free radical photoinitiators OXE02, OXE03, 814, and 127.

3. The LCD liquid crystal display encapsulation tape according to claim 1 or 2, characterized in that, The inorganic filler includes SiO2, and the particle size of the inorganic filler is 500-700 nm; The silane coupling agent includes KH560 and / or KH570; The spacer is made of polystyrene and / or silicon dioxide.

4. The LCD liquid crystal display encapsulation tape according to claim 1, characterized in that, The thickness of the adhesive film is 3-8 μm; the material of the release film includes PET.

5. The method for preparing the LCD liquid crystal display encapsulation tape according to any one of claims 1 to 4, characterized in that, Includes the following steps: A low-boiling-point solvent, hydrazide curing agent, photoinitiator, bisphenol A epoxy resin, acrylic resin, epoxy acrylic resin, silane coupling agent, inorganic filler, spacer and acrylic microspheres are mixed and filtered to obtain a low-viscosity adhesive. The low-tack adhesive is applied to a release film, and then solvent removal, UV curing, cutting, and packaging are performed sequentially to obtain an LCD liquid crystal display encapsulation tape.

6. The preparation method according to claim 5, characterized in that, The low-boiling-point solvent includes ethyl acetate, and the mass content of the low-boiling-point solvent in the low-viscosity adhesive is 60-80%.

7. The preparation method according to claim 5, characterized in that, The coating method is microgravure coating; The solvent removal temperature is 40–80°C, and the time is 2–5 minutes.

8. The preparation method according to claim 5, characterized in that, The UV curing wavelength is 330–395 nm, the energy density is 3000–5000 mJ, and the time is ≤1 min.

9. The application of the LCD encapsulation tape according to any one of claims 1 to 4 or the LCD encapsulation tape prepared by the preparation method according to any one of claims 5 to 8 in LCD encapsulation.

10. A method for packaging an LCD liquid crystal display, characterized in that, Includes the following steps: After thawing, the LCD display encapsulation tape is sequentially applied, vacuum-fitted, and heat-cured. The LCD encapsulation tape is the LCD encapsulation tape according to any one of claims 1 to 4 or the LCD encapsulation tape prepared by the preparation method according to any one of claims 5 to 8.

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