Supporting film adhesive tape as well as preparation method and application thereof

Abstract

The invention provides a support film adhesive tape as well as a preparation method and application thereof. The support film adhesive tape comprises a release film layer, an adhesive layer, a base material layer and an antistatic coating which are arranged in sequence, the antistatic coating is prepared from the following materials in parts by weight: 100 parts of an antistatic agent, 0.3 to 3.5 parts of a release agent and 0.5 to 2 parts of a curing agent; the antistatic agent comprises PEDOT (poly (3, 4-ethylenedioxythiophene)): According to the supporting film adhesive tape, printing ink is easy to transfer, residues are avoided, meanwhile, high viscous force is achieved, the adhesive property with grid glue is good, the using effect is good, and the anti-static coating is good in solvent resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesive materials, and in particular relates to a support film tape and a preparation method and application thereof. Background Art

[0002] In the packaging process of OLED thin films, support films are usually used to prevent the OLED thin films from deforming during the subsequent production, transportation, and assembly processes, which may even affect the use of the entire display screen.

[0003] The support film is an optical grade material with strict appearance requirements. It cannot have short scratches, foreign matter spots, bubbles, die-cutting debris and other appearance problems. Therefore, it is necessary to inspect the product appearance online at all times. During this inspection process, the support film needs to be die-cut into small samples, and the product appearance, performance and other information needs to be printed into a QR code on the back of the product substrate by spraying ink to facilitate product inspection. Then in the subsequent process, the ink QR code is removed and the next step is carried out, that is, bonding with the grid glue.

[0004] However, in the existing support film tape, after the ink is sprayed on the back of the support film substrate to print the QR code, in the subsequent process, when the ink QR code is removed, the ink transfer is not complete, and some ink remains on the back of the substrate, affecting the use of subsequent products. Therefore, in the prior art, the surface energy of the antistatic layer of the substrate is usually reduced to facilitate the complete transfer of the ink, but the reduction of the surface energy will greatly affect the adhesive force of the tape on the back of the support film substrate, resulting in poor adhesion between the surface of the antistatic layer and the grid glue, which is also not conducive to the use of the support film tape.

[0005] Therefore, developing a support film tape that has good bonding effect and is easy to remove ink two-dimensional codes is an urgent problem to be solved in the field. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a support film tape and a preparation method and application thereof. The support film tape is easy to transfer ink without residue, has high viscosity, good bonding performance with grid glue, and good use effect.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a support film tape, which includes a release film layer, an adhesive layer, a substrate layer and an antistatic coating arranged in sequence; the material of the antistatic coating includes 100 parts of an antistatic agent, 0.3 to 3.5 parts of a release agent and 0.5 to 2 parts of a curing agent in parts by weight; the antistatic agent includes PEDOT:PSS.

[0009] In the present invention, the support film tape and the antistatic coating adopt a specific formula, that is, a specific type of antistatic agent is compounded with a release agent and a curing agent, which can not only reduce the surface energy of the antistatic coating, so that the ink two-dimensional code on the surface of the antistatic coating is easy to remove without residue; but also ensure that the antistatic coating has high viscosity, so that the antistatic coating has good adhesion with materials such as grid glue, high peeling strength, and good moisture and heat resistance and solvent resistance.

[0010] In the present invention, 0.3 to 3.5 parts of the release agent can be, for example, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48, 0.5, 0.52, 0.54, 0.56, 0.58, 0.6, 0.62, 0.64, 0.66, 0.68, 0.7, 0. 72 parts, 0.74 parts, 0.76 parts, 0.78 parts, 0.8 parts, 0.82 parts, 0.84 parts, 0.86 parts, 0.88 parts, 0.9 parts, 0.92 parts, 0.94 parts, 0.96 parts, 0.98 parts, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, 3.2 parts, 3.4 parts, 3.5 parts, etc.

[0011] In the present invention, 0.5 to 2 parts of curing agent can be, for example, 0.5 part, 0.52 part, 0.54 part, 0.56 part, 0.58 part, 0.6 part, 0.62 part, 0.64 part, 0.66 part, 0.68 part, 0.7 part, 0.72 part, 0.74 part, 0.76 part, 0.78 part, 0.8 part, 0.82 part, 0.84 part, 0.86 part, 0.88 part, 0.9 part, 0.92 part, 0.94 part, 0.96 part, 0.98 part, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, etc.

[0012] Preferably, the release agent includes polyethylene wax emulsion and / or T-738.

[0013] In the present invention, the T-738 is selected from Chukyo Oil & Fats Co., Ltd.

[0014] In the present invention, the mass concentration of the polyethylene wax emulsion is 20-40%, for example, it can be 20%, 25%, 30%, 35%, 40%, etc.

[0015] Preferably, the curing agent comprises a polymer of aziridine and / or butylated methylated formaldehyde.

[0016] Preferably, after the PEDOT:PSS is treated with an organic solvent and / or water, the surface impedance value is 104 ~10 6 , for example, it can be 10 4 , 2×10 4 , 4×10 4 , 6×10 4 , 8×10 4 , 10 5 , 2×10 5 , 4×10 5 , 6×10 5 , 8×10 5 , 10 6 wait.

[0017] In the present invention, the method for treating PEDOT:PSS with an organic solvent and / or water is as follows: coating a PEDOT:PSS solution (solid content of 0.5-10%) on the surface of a substrate (which may be a PET film, glass, etc.), drying it at 110-140° C. to form a film, then wiping the obtained film 10-30 times with an organic solvent and / or water, and measuring its surface impedance value with a Trek152 impedance meter; the organic solvent includes but is not limited to ethanol, isopropanol, etc.

[0018] Preferably, the antistatic coating further comprises 0.2 to 0.8 parts of an aqueous resin, for example, 0.2, 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48, 0.5, 0.52, 0.54, 0.56, 0.58, 0.6, 0.62, 0.64, 0.66, 0.68, 0.7, 0.72, 0.74, 0.76, 0.78, 0.8, etc.

[0019] Preferably, the water-based resin includes water-based acrylic resin and / or water-based polyurethane resin.

[0020] In the present invention, the solid content of the water-based resin is 20-50%, for example, it can be 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc.

[0021] Preferably, the thickness of the antistatic coating is 10 to 100 nm, for example, 10 nm, 15 nm, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, 95 nm, 100 nm, etc.

[0022] Preferably, the thickness of the substrate layer is 20 to 100 μm, for example, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, etc.

[0023] Preferably, the substrate layer comprises an optical substrate layer.

[0024] Preferably, the light transmittance of the substrate layer is greater than 92%, and the haze of the substrate layer is less than 2%.

[0025] Preferably, the substrate layer comprises a biaxially oriented polyethylene terephthalate (PET) film.

[0026] Preferably, the thickness of the adhesive layer is 8 to 50 μm, for example, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 28 μm, 30 μm, 32 μm, 35 μm, 38 μm, 40 μm, 42 μm, 45 μm, 48 μm, 50 μm, etc.

[0027] Preferably, the adhesive layer includes an acrylic adhesive layer.

[0028] In the present invention, the material of the adhesive layer includes but is not limited to the material used for the adhesive layer of the support film disclosed in patent CN116855187A.

[0029] Preferably, the thickness of the release film layer is 20-100 μm, for example, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, etc.

[0030] Preferably, the release film layer comprises an optical release film layer.

[0031] Preferably, the material of the release film layer includes polyethylene terephthalate.

[0032] Preferably, the surface impedance value of the release film layer is 10 4 ~10 8 , for example, it can be 10 4 , 2×10 4 , 4×10 4 , 6×10 4 , 8×10 4 , 10 5 , 2×10 5 , 4×10 5 , 6×105 , 8×10 5 , 10 6 , 2×10 6 , 4×10 6 , 6×10 6 , 8×10 6 , 10 7 , 2×10 7 , 4×10 7 , 6×10 7 , 8×10 7 , 10 8 wait.

[0033] In a second aspect, the present invention provides a method for preparing the support film tape according to the first aspect, the preparation method comprising the following steps:

[0034] The release film layer, the adhesive layer, the substrate layer and the antistatic coating layer are stacked in sequence and cured to obtain the support film tape.

[0035] Preferably, the lamination method includes: coating an antistatic coating slurry on one surface of the substrate, drying, and obtaining a substrate layer and an antistatic coating layer stacked in sequence; coating an adhesive on the release surface of the release film layer, and obtaining an adhesive layer and a release film layer stacked in sequence; and then laminating the adhesive layer with the substrate layer, and obtaining a release film layer, an adhesive layer, a substrate layer and an antistatic coating layer stacked in sequence.

[0036] Preferably, the method for preparing the antistatic coating slurry comprises: mixing an antistatic agent, a release agent, a curing agent and a solvent to obtain the antistatic coating slurry.

[0037] Preferably, the solid content of the antistatic coating slurry is 0.5-10%, for example, 0.5%, 1%, 2%, 4%, 6%, 8%, 10%, etc.

[0038] Preferably, the solvent includes water and / or an alcohol solvent.

[0039] Preferably, the alcohol solvent includes at least one of methanol, ethanol and isopropanol.

[0040] Preferably, the solvent includes water and an alcohol solvent, and the mass ratio of water to the alcohol solvent is (0.5-1.5):1, wherein the specific value of (0.5-1.5) can be, for example, 0.5, 0.6, 0.8, 1, 1.2, 1.4, 1.5, etc.

[0041] Preferably, the drying temperature is 110-140°C, for example, 110°C, 115°C, 120°C, 125°C, 130°C, 135°C, 140°C, etc.

[0042] Preferably, the aging temperature is 40-60°C, for example, 40°C, 42°C, 44°C, 46°C, 48°C, 50°C, 52°C, 54°C, 56°C, 58°C, 60°C, etc.

[0043] Preferably, the aging time is 3 to 7 days, for example, 3 days, 4 days, 5 days, 6 days, 7 days, etc.

[0044] In a third aspect, the present invention provides a use of the support film tape according to the first aspect in an OLED thin film encapsulation process.

[0045] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The support film tape provided by the present invention has an antistatic coating with a specific formula, that is, a specific type of antistatic agent is compounded with a release agent and a curing agent, which can not only reduce the surface energy of the antistatic coating, so that the ink two-dimensional code on the surface of the antistatic coating is easy to remove without residue; but also ensure that the antistatic coating has high viscosity, so that the antistatic coating has good adhesion with materials such as grid glue, high peeling strength, and good solvent resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of the structure of the support film tape provided in Example 1 of the present invention;

[0049] Among them, 40 is a release film layer; 30 is an adhesive layer; 20 is a substrate layer; and 10 is an antistatic coating layer. DETAILED DESCRIPTION

[0050] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0051] The materials used in the present invention can be obtained by commercially available or conventional methods. Unless otherwise specified, the materials used in the present invention are as follows:

[0052] Release film layer: surface impedance value is 10 4 -10 7 Optical PET release film with a thickness of 50μm; R503T from Shenzhen Ruihua Technology Co., Ltd.

[0053] Adhesive layer: The material is selected from the support film adhesive provided in Example 1 of CN116855187A.

[0054] Substrate layer: optical PET biaxially oriented film with light transmittance > 92%, haze < 2%, thickness 75 μm; YM32 from Sichuan Dongcai Technology Group Co., Ltd.

[0055] Antistatic coating

[0056] Antistatic agent 1: PEDOT:PSS, wiped with ethanol, the surface impedance value of the antistatic coating is 10 5 ; HBT-206A from Hubei Shengsaino New Materials Co., Ltd.

[0057] Antistatic agent 2: PEDOT:PSS, wiped with ethanol, the surface impedance value of the antistatic coating is 10 7 ; WT311 from Shandong Juli Antistatic Technology Co., Ltd.

[0058] Antistatic agent 3: PEDOT:PSS, wiped with ethanol, the surface impedance of the antistatic coating is 10 4 ; Weifang Haitong New Material Technology Co., Ltd. HT-A.

[0059] In the present invention, the wiping times of antistatic agents 1 to 3 are the same. It should be noted that the surface impedance value remains substantially unchanged with the wiping times within the range defined in the present invention.

[0060] Example 1

[0061] This embodiment provides a support film tape, the structural schematic diagram of the support film tape is as follows Figure 1 As shown, it includes a release film layer 40, an adhesive layer 30, a substrate layer 20 and an antistatic coating 10 arranged in sequence; the thickness of the adhesive layer is 13μm; the thickness of the antistatic coating is 50nm; in parts by weight, the material of the antistatic coating includes 100 parts of antistatic agent 1, 0.5 parts of polyethylene wax emulsion (mass concentration of 30%, Shanghai Wengkaier CT1389) and 0.8 parts of aziridine.

[0062] This embodiment provides a method for preparing a support film tape, which specifically includes the following steps:

[0063] The antistatic agent 1, polyethylene wax emulsion, aziridine and solvent are mixed to obtain an antistatic agent coating slurry with a solid content of 1.2%, wherein the solvent is a mixed solvent of isopropyl alcohol and water in a mass ratio of 1:1; the antistatic coating slurry is coated on one surface of the substrate layer, dried at 120° C., and rolled up with the antistatic coating surface facing outward to obtain a substrate layer and an antistatic coating layer stacked in sequence; the support film adhesive is coated on the release surface of the release film layer to obtain an adhesive layer and a release film layer stacked in sequence; then the adhesive layer is laminated to the substrate layer, and the antistatic coating surface is rolled up outward to obtain a release film layer, an adhesive layer, a substrate layer and an antistatic coating layer stacked in sequence; and then the support film tape is aged at 50° C. for 5 days to obtain the support film tape.

[0064] Example 2

[0065] The present embodiment provides a support film tape, which includes a release film layer, an adhesive layer, a substrate layer and an antistatic coating arranged in sequence; the thickness of the adhesive layer is 25 μm; the thickness of the antistatic coating is 20 nm; in parts by weight, the material of the antistatic coating includes 100 parts of antistatic agent 1, 0.3 parts of polyethylene wax emulsion (mass concentration of 30%, Shanghai Wengkaier CT1389) and 1.8 parts of aziridine.

[0066] This embodiment provides a method for preparing a support film tape, and the specific steps are the same as those in Embodiment 1.

[0067] Example 3

[0068] The present embodiment provides a support film tape, which includes a release film layer, an adhesive layer, a substrate layer and an antistatic coating arranged in sequence; the thickness of the adhesive layer is 45 μm; the thickness of the antistatic coating is 80 nm; in parts by weight, the material of the antistatic coating includes 100 parts of antistatic agent 1, 0.3 parts of polyethylene wax emulsion (mass concentration of 30%, Shanghai Wengkaier CT1389), 3 parts of release agent T-738 (Zhongjing Oil Co., Ltd.) and 1.8 parts of aziridine.

[0069] This embodiment provides a method for preparing a support film tape, and the specific steps are the same as those in Embodiment 1.

[0070] Example 4

[0071] This embodiment provides a support film tape, which differs from Example 1 only in that the polyethylene wax emulsion is replaced with an equal mass of release agent T-738 produced by Zhongjing Oil Co., Ltd. (the solid content is adjusted to be the same as that of the polyethylene wax emulsion), and the other components, dosage, structure and preparation method are the same as those in Example 1.

[0072] Example 5

[0073] This embodiment provides a support film tape, which differs from the embodiment 1 only in that the polyethylene wax emulsion is replaced with an organosilicon release agent of equal mass, purchased from Guangdong Biaomei Silicone Fluorine New Materials Co., Ltd. (Solvent type) (solid content is adjusted to be the same as that of polyethylene wax emulsion), other components, dosage, structure and preparation method are the same as those in Example 1.

[0074] Example 6

[0075] This embodiment provides a support film tape, which differs from Embodiment 1 only in that aziridine is replaced by an equal mass of a polymer of butylated methylated formaldehyde (CAS No.: 68036-97-5), and other components, amounts, structures and preparation methods are the same as those in Embodiment 1.

[0076] Example 7

[0077] This embodiment provides a support film tape, which is different from Embodiment 1 only in that the antistatic agent 1 is replaced by an antistatic agent 2 of equal mass, and other components, dosage, structure and preparation method are the same as those of Embodiment 1.

[0078] Example 8

[0079] This embodiment provides a support film tape, which is different from Embodiment 1 only in that the antistatic agent 1 is replaced by an antistatic agent 3 of equal mass, and other components, dosage, structure and preparation method are the same as those of Embodiment 1.

[0080] Example 9

[0081] This embodiment provides a support film tape, which differs from Embodiment 1 only in that, by weight, the material of the antistatic coating further includes 0.3 parts of water-based acrylic resin (Seacryl11P27, Guangdong Xidun New Materials Technology Co., Ltd.), and the other components, amounts, structures and preparation methods are the same as those in Embodiment 1.

[0082] Example 10

[0083] This embodiment provides a support film tape, which differs from Example 1 only in that, by weight, the material of the antistatic coating also includes 0.7 parts of water-based polyurethane resin (Seapur40P35, Guangdong Xidun New Materials Technology Co., Ltd.), and the other components, amounts, structures and preparation methods are the same as those in Example 1.

[0084] Embodiment 11

[0085] This embodiment provides a support film tape, which is different from Embodiment 9 only in that the mass of the water-based acrylic resin is 0.1 parts, and the other components, dosage, structure and preparation method are the same as those of Embodiment 9.

[0086] Example 12

[0087] This embodiment provides a support film tape, which is different from Embodiment 9 only in that the mass of the water-based acrylic resin is 1.1 parts, and the other components, dosage, structure and preparation method are the same as those of Embodiment 9.

[0088] Comparative Example 1

[0089] This comparative example provides a support film tape, which is different from Example 1 only in that the mass of the polyethylene wax emulsion is 0.1 parts, and the other components, dosage, structure and preparation method are the same as those in Example 1.

[0090] Comparative Example 2

[0091] This comparative example provides a support film tape, which is different from Example 1 only in that the mass of the polyethylene wax emulsion is 5 parts, and the other components, dosage, structure and preparation method are the same as those in Example 1.

[0092] Comparative Example 3

[0093] This comparative example provides a support film tape, which is different from Example 1 only in that the mass of the aziridine is 0.2 parts, and the other components, dosage, structure and preparation method are the same as those in Example 1.

[0094] Comparative Example 4

[0095] This comparative example provides a support film tape, which is different from Example 1 only in that the mass of the aziridine is 3 parts, and the other components, dosage, structure and preparation method are the same as those in Example 1.

[0096] Comparative Example 5

[0097] This comparative example provides a support film tape, which is different from Example 1 only in that the material of the antistatic coating does not contain aziridine, and the other components, dosage, structure and preparation method are the same as those of Example 1.

[0098] Comparative Example 6

[0099] This comparative example provides a support film tape, which is different from Example 1 only in that the antistatic coating material does not contain polyethylene wax emulsion, and other components, dosage, structure and preparation method are the same as those in Example 1.

[0100] Comparative Example 7

[0101] This comparative example provides a support film tape, which differs from Example 1 only in that the antistatic agent 1 is replaced by lithium bis(trifluoromethylsulfonyl)imide of equal mass of effective ingredient, and other components, dosage, structure and preparation method are the same as those in Example 1.

[0102] Comparative Example 8

[0103] This comparative example provides a support film tape, which is different from Example 1 only in that the material of the antistatic coating does not contain a release agent and a curing agent, and is 100 parts of antistatic agent 1, and the rest is the same as Example 1.

[0104] Performance Testing

[0105] (1) Peeling force: The antistatic coating in the support film tape provided in Examples 1 to 12 and Comparative Examples 1 to 8 was laminated with a test tape, and a peeling force tester was used to test the initial peeling force between the antistatic coating and the test tape (denoted as F0), the peeling force after being placed at room temperature for 24 hours (denoted as F1), and the peeling force after being placed at room temperature for 24 hours and then placed at 80°C for 5 minutes (denoted as F2). The test tapes were selected from commercially available Tesa7475 test tapes and Nitto31B test tapes; wherein, the initial peeling force F0 tested the peeling force between the Tesa7475 test tape and the Nitto31B test tape; and F1 and F2 tested the peeling force between the Dwell US8719B test tape.

[0106] (2) Surface energy: At a temperature of (23±2)°C and a relative humidity of (50±10)%, the surface energy of the antistatic coating in the support film tapes provided in Examples 1 to 12 and Comparative Examples 1 to 8 was tested using an Arcotest pen. The test was repeated three times in parallel and the average value was taken.

[0107] (3) Surface impedance value: Wrap a dust-free cloth with a 500 g weight, add 99% ethanol on the surface of the dust-free cloth, then wipe the surface of the antistatic coating in the support film tape provided in Examples 1 to 12 and Comparative Examples 1 to 8 about 20 times, and measure the surface impedance value using a Trek152 impedance meter.

[0108] (3) Ink transfer ratio: A two-dimensional code is printed on the surface of the antistatic coating in the support film tape provided in Examples 1 to 12 and Comparative Examples 1 to 8 (the ink is purchased from Lanyin Industrial Marking Co., Ltd. LT-Y200), and then the tape is attached. The ink two-dimensional code is transferred using the tape. The ratio of the ink two-dimensional code transferred from the antistatic coating surface to the total area of ​​the ink two-dimensional code is observed, which is the ink transfer ratio.

[0109] The specific test results are shown in Table 1.

[0110] Table 1

[0111]

[0112] As can be seen from Table 1, the support film tape provided by the present invention has an antistatic coating with a specific formula, that is, a specific type of antistatic agent is compounded with a release agent and a curing agent. Compared with the conventional support film tape, the surface energy of the antistatic coating can be reduced, so that the ink two-dimensional code on the surface of the antistatic coating is easy to remove without residue; and the antistatic coating can be ensured to have high adhesion, so that the antistatic coating has good adhesion with materials such as grid glue and high peel strength; the support film tape has F0≥2614gf / inch and F1≥2509gf / inch compared with the Tesa7475 test tape; and F0≥893gf / inch and F1≥767gf / inch compared with the Nitto31B test tape; the surface energy is ≤28dyne / cm, and the ink transfer ratio is greater than 90%, and can even reach 100%.

[0113] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A support film tape, characterized in that: The support film tape comprises a release film layer, an adhesive layer, a substrate layer and an antistatic coating layer which are arranged in sequence; In parts by weight, the material of the antistatic coating includes 100 parts of an antistatic agent, 0.3 to 3.5 parts of a release agent, and 0.5 to 2 parts of a curing agent; The antistatic agent includes PEDOT:PSS.

2. The support film tape according to claim 1, characterized in that: The release agent includes polyethylene wax emulsion and / or T-738; Preferably, the curing agent comprises a polymer of aziridine and / or butylated methylated formaldehyde; Preferably, after the PEDOT:PSS is treated with an organic solvent and / or water, the surface impedance value is 10 4 ~10 6 .

3. The support film tape according to claim 1 or 2, characterized in that: The antistatic coating further comprises 0.2 to 0.8 parts of water-based resin in parts by weight; Preferably, the water-based resin includes water-based acrylic resin and / or water-based polyurethane resin.

4. The support film tape according to any one of claims 1 to 3, characterized in that: The thickness of the antistatic coating is 10 to 100 nm; Preferably, the thickness of the substrate layer is 20 to 100 μm; Preferably, the substrate layer comprises an optical substrate layer; Preferably, the light transmittance of the substrate layer is greater than 92%, and the haze of the substrate layer is less than 2%; Preferably, the substrate layer comprises a biaxially oriented polyethylene terephthalate film.

5. The support film tape according to any one of claims 1 to 4, characterized in that: The thickness of the adhesive layer is 8 to 50 μm; Preferably, the adhesive layer comprises an acrylic adhesive layer; Preferably, the thickness of the release film layer is 20 to 100 μm; Preferably, the release film layer comprises an optical release film layer; Preferably, the material of the release film layer includes polyethylene terephthalate; Preferably, the surface impedance value of the release film layer is 10 4 ~10 8 .

6. A method for preparing a support film tape according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: The release film layer, the adhesive layer, the substrate layer and the antistatic coating layer are stacked in sequence and cured to obtain the support film tape.

7. The preparation method according to claim 6, characterized in that: The lamination method comprises: coating an antistatic coating slurry on one surface of a substrate, drying, and obtaining a substrate layer and an antistatic coating layer laminated in sequence; coating an adhesive on a release surface of a release film layer, and obtaining an adhesive layer and a release film layer laminated in sequence; and then laminating the adhesive layer with the substrate layer, and obtaining a release film layer, an adhesive layer, a substrate layer and an antistatic coating layer laminated in sequence.

8. The preparation method according to claim 7, characterized in that: The preparation method of the antistatic coating slurry comprises: mixing an antistatic agent, a release agent, a curing agent and a solvent to obtain the antistatic coating slurry; Preferably, the solid content of the antistatic coating slurry is 0.5-10%; Preferably, the solvent comprises water and / or an alcohol solvent; Preferably, the alcohol solvent includes at least one of methanol, ethanol and isopropanol; Preferably, the solvent comprises water and an alcohol solvent, and the mass ratio of water to the alcohol solvent is (0.5-1.5):1; Preferably, the drying temperature is 110-140°C.

9. The preparation method according to any one of claims 6 to 8, characterized in that: The aging temperature is 40-60°C; Preferably, the ripening time is 3 to 7 days.

10. Use of the support film tape according to any one of claims 1 to 5 in an OLED thin film encapsulation process.

Images