A low-viscosity and highly wettable matte black tape and its preparation method

Abstract

The present invention relates to the technical field of low-viscosity tapes, and specifically to a low-viscosity, highly wettable matte black tape and a preparation method thereof. From top to bottom, it successively includes the following structures: a low-viscosity, highly wettable adhesive layer, a substrate, an adhesive layer, and a release layer; the low-viscosity, highly wettable adhesive layer includes the following components: butyl ester, n-heptane, acrylic resin, tackifying resin, and curing agent; the tackifying resin is prepared by reacting polymerized rosin, 12-hydroxy dodecyl methacrylate, and 1,3-divinyl-2-imidazolidinone. Compared with ordinary tapes on the existing market, the present invention has at least halved the thickness, and at the same time can meet the requirements of the adhesive surface for bonding performance, saving space to a certain extent and providing more feasibility for the development of ultra-thin electronic devices; on the other hand, the adhesive layer has the characteristics of low viscosity and high wettability, which can greatly improve the product processing yield and reduce the difficulty of rework.

Description

Technical Field

[0001] The present invention relates to the technical field of low-viscosity tapes, and particularly to a low-viscosity, highly wettable matte black tape and a preparation method thereof. Background Art

[0002] With the rapid development of the electronics industry, the demand for functional tapes is increasing day by day. In addition to bonding the internal components of electronic products, tapes can also be compounded with other functional materials and used inside electronic components as a composite structure. For example, an ultra-thin matte black single-sided tape is designed to be used together with graphite as the adherend in electronic products. Based on the development trend of thin and light electronic devices, the control of the tape thickness used inside them is becoming more and more stringent. In addition, in order to improve the processing yield, reduce the probability of rework and defect rate, requirements are also put forward for the adhesiveness of the tape itself, especially considering the need to meet the peel strength requirements of both ultra-thin steel plates and graphite in actual use. Due to production process and technical limitations, the thickness of the tapes commonly popular in the market at present is usually above 20 μm, which cannot meet the usage requirements of today's ultra-thin electronic components. Therefore, we propose a low-viscosity, highly wettable matte black tape. Summary of the Invention

[0003] The purpose of the present invention is to provide a low-viscosity, highly wettable matte black tape and a preparation method thereof, so as to solve the problems raised in the above background art.

[0004] In order to solve the above technical problems, the present invention provides the following technical solution: A low-viscosity, highly wettable matte black tape includes the following structures from top to bottom in sequence: a low-viscosity, highly wettable adhesive layer, a base material, an adhesive layer, and a release layer.

[0005] Further, the thickness of the low-viscosity, highly wettable adhesive layer is 3 - 4 μm.

[0006] Further, the base material is a PET film with a thickness of 1.5 - 1.8 μm.

[0007] Further, the release layer is a transparent PET release film with a thickness of 45 - 50 μm.

[0008] Further, the adhesive layer is an acrylic adhesive with a thickness of 1.0 - 1.5 μm.

[0009] Further, the overall thickness of the tape is controlled within 7 μm.

[0010] Further, the low-viscosity, highly wettable adhesive layer includes the following weight components: 100 parts of butyl ester, 200 parts of n-heptane, 100 parts of acrylic resin, 4 - 6 parts of tackifying resin, and 0.5 part of curing agent.

[0011] Further, the curing agent is isocyanate curing agent E21, sourced from Covestro Shanghai;

[0012] Acrylic resin: JT-207A, sourced from Foshan Juntu New Materials Co., Ltd.

[0013] Further, the relative peel force of the release layer < 6 gf / in;

[0014] The peel force of the adhesive layer ranges from 200 to 400 gf / in.

[0015] Further, the adhesive layer is obtained by coating on the substrate using a gravure reverse coating process.

[0016] Further, the low-viscosity and high-wetting glue layer is obtained by coating on the other side of the substrate using a gravure printing process.

[0017] Further, the low-viscosity and high-wetting glue layer specifically includes the following preparation method:

[0018] Take butyl ester, n-heptane, and acrylic resin and mix them, stirring for 8 - 12 min; add tackifying resin and continue stirring for 8 - 12 min; add curing agent to obtain acrylic glue;

[0019] Using a gravure printing process, coat the acrylic glue on the surface of the corona-treated substrate; dry it at a temperature of 108 - 112 °C for 10 - 30 s; place it at a temperature of 45 - 50 °C and cure for 24 h.

[0020] Further, the corona value on the surface of the corona-treated substrate is 38 - 40 dynes.

[0021] Further, the tackifying resin is prepared by the following process:

[0022] Under the protection of a nitrogen atmosphere, take polymerized rosin and zinc oxide and mix them, heating and stirring until melted; raise the temperature to 210 - 230 °C, slowly add 12-hydroxydodecyl methacrylate, and react until the acid value of the system reaches 1 - 10 mgKOH / g after addition; cool to 80 °C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60 °C to obtain an esterification product;

[0023] Take the esterification product, dissolve it in toluene, and under the protection of a nitrogen atmosphere, add 1,3-divinyl-2-imidazolidinone and initiator, raise the temperature to 100 - 120 °C, and react for 6 - 10 h; rotary evaporate to remove the solvent and dry in vacuum at 60 °C to obtain the tackifying resin.

[0024] Further, the mass ratio of polymerized rosin, zinc oxide, and 12-hydroxydodecyl methacrylate is 100:(1.0 - 1.5):(80 - 90);

[0025] Polymerized rosin: softening point 141 °C, acid value 145 mg KOH / g, sourced from Guangzhou Songbao Chemical Co., Ltd.;

[0026] Furthermore, the mass ratio of the esterification product, 1,3-divinyl-2-imidazolidinone, and initiator AIBN is 100:(200 - 265):(3.0 - 3.6);

[0027] The ratio of the esterification product to toluene is (5 - 10) g / 100 mL;

[0028] The initiator is azobisisobutyronitrile.

[0029] In the above technical solution, due to the increase in relative molecular mass and the partial elimination of double bonds, polymerized rosin has the characteristics of light color, low acid value, high viscosity, non-crystallization, high softening point, good compatibility, excellent antioxidant property, and strong durability, and is suitable as the tackifying resin system in the acrylic glue of the present invention. Reacting with 12-hydroxydodecyl methacrylate, the carboxyl groups on its molecular chain are esterified with the hydroxyl groups in 12-hydroxydodecyl methacrylate to obtain an esterification product, and then the carbon-carbon double bonds in the prepared esterification product are subjected to free radical polymerization with 1,3-divinyl-2-imidazolidinone to obtain a tackifying resin. Introducing a hydrophobic alkyl long chain into the tackifying resin system can effectively improve the compatibility of the prepared tackifying resin in the acrylic glue system; improve the viscosity, flexibility, and lubricating properties of the tackifying resin, achieve the tackifying effect of the tackifying resin, improve the wettability of the prepared acrylic glue at the bonding interface, and be more conducive to its spreading at the interface. Introducing imidazoline into the tackifying resin system enhances the π-bond adsorption of the tackifying resin, and improves the surface tension of the tackifying resin through its planar structural form, further improving the wettability of the prepared acrylic glue at the bonding interface. The long-chain alkyl and the imidazoline at its end in the tackifying resin system limit the movement of the tackifying resin in the adhesive layer system. After making a tape to form a low-viscosity and high-wettability adhesive layer, it can reduce the adhesiveness of the prepared adhesive layer and is less likely to produce residual glue after use.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] The low-viscosity and high-wettability matte black tape of the present invention and its preparation method, compared with ordinary tapes on the existing market, reduce the thickness by at least half, and at the same time can meet the requirements of the adhesive surface for bonding performance, saving space to a certain extent and providing more feasibility for the development of ultra-thin electronic devices; on the other hand, the adhesive layer has the characteristics of low viscosity and high wettability, which can greatly improve the product processing yield and reduce the difficulty of rework. Detailed implementation mode

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The curing agent is isocyanate curing agent E21, sourced from Covestro Shanghai Co., Ltd.

[0034] Acrylic resin: JT-207A, sourced from Foshan Juntu New Materials Co., Ltd.

[0035] Polymerized rosin: softening point 141°C, acid value 145mgKOH / g, sourced from Guangzhou Songbao Chemical Co., Ltd.

[0036] Example 1

[0037] S1. Take acrylic adhesive, coat it on the substrate by microgravure coating process to obtain an adhesive layer, and cover a release layer on the adhesive layer.

[0038] S2. Under the protection of nitrogen atmosphere, take 100g of polymerized rosin and 1.0g of zinc oxide, mix and heat with stirring until melted; heat up to 210°C, slowly add 80g of 12-hydroxydodecyl methacrylate, and react until the acid value of the system reaches 10mgKOH / g after adding; cool to 80°C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60°C to obtain an esterification product.

[0039] Take 100g of the esterification product, dissolve it in toluene, add 200g of 1,3-divinyl-2-imidazolidinone and 3.0g of initiator azobisisobutyronitrile under the protection of nitrogen atmosphere, heat up to 100°C, and react for 6h; rotary evaporate to remove the solvent, and dry in vacuum at 60°C to obtain a tackifying resin.

[0040] S3. Take 100g of butyl ester, 200g of n-heptane, and 100g of acrylic resin, stir for 8min; add 4g of tackifying resin and continue to stir for 8min; add 0.5g of curing agent to obtain acrylic glue.

[0041] Adopt microgravure printing process to coat the acrylic glue on the other surface of the corona-treated substrate, with a corona value of 38 dynes; place it in an oven at 108°C and dry for 10s; place it at 45°C and cure for 24h to form a low-viscosity and high-wettability adhesive layer; obtain a tape.

[0042] The thickness of the low-viscosity and high-wettability adhesive layer is 3.5μm; the substrate is a PET film with a thickness of 1.8μm; the release layer is a transparent PET release film with a thickness of 50μm; the adhesive layer is acrylic adhesive with a thickness of 1.2μm.

[0043] Example 2

[0044] S1. Take acrylic adhesive and coat it on the substrate by microgravure coating process to obtain an adhesive layer, and cover a release layer on the adhesive layer;

[0045] S2. Under the protection of nitrogen atmosphere, take 100 g of polymerized rosin and 1.2 g of zinc oxide, mix and heat with stirring until melted; heat up to 220 °C, slowly add 85 g of 12 - hydroxydodecyl methacrylate, and react until the acid value of the system reaches 5 mgKOH / g after addition; cool to 80 °C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60 °C to obtain an esterification product;

[0046] Take 100 g of the esterification product, dissolve it in toluene, under the protection of nitrogen atmosphere, add 232 g of 1,3 - divinyl - 2 - imidazolidinone and 3.3 g of initiator azobisisobutyronitrile, heat up to 110 °C, and react for 8 h; remove the solvent by rotary evaporation and dry in vacuum at 60 °C to obtain a tackifying resin;

[0047] S3. Take 100 g of butyl ester, 200 g of n - heptane, and 100 g of acrylic resin, stir for 10 min; add 5 g of tackifying resin and continue to stir for 10 min; add 0.5 g of curing agent to obtain acrylic glue;

[0048] Adopt microgravure printing process to coat acrylic glue on the other surface of the corona - treated substrate, with a corona value of 39 dynes; place it in an oven at 110 °C and dry for 20 s; place it at 48 °C and cure for 24 h to form a low - viscosity and high - wettability adhesive layer; obtain a tape.

[0049] The thickness of the low - viscosity and high - wettability adhesive layer is 3.5 μm; the substrate is a PET film with a thickness of 1.8 μm; the release layer is a transparent PET release film with a thickness of 50 μm; the adhesive layer is acrylic adhesive with a thickness of 1.2 μm.

[0050] Example 3

[0051] S1. Take acrylic adhesive and coat it on the substrate by microgravure coating process to obtain an adhesive layer, and cover a release layer on the adhesive layer;

[0052] S2. Under the protection of nitrogen atmosphere, take 100 g of polymerized rosin and 1.5 g of zinc oxide, mix and heat with stirring until melted; heat up to 230 °C, slowly add 90 g of 12 - hydroxydodecyl methacrylate, and react until the acid value of the system reaches 1 mgKOH / g after addition; cool to 80 °C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60 °C to obtain an esterification product;

[0053] Take 100 g of the esterification product, dissolve it in toluene, and under the protection of a nitrogen atmosphere, add 265 g of 1,3-divinyl-2-imidazolidinone and 3.6 g of the initiator azobisisobutyronitrile. Heat up to 120 °C and react for 10 h; Rotate evaporate to remove the solvent and dry in vacuum at 60 °C to obtain the tackifying resin;

[0054] S3. Take 100 g of butyl ester, 200 g of n-heptane, and 100 g of acrylic resin, mix and stir for 12 min; Add 6 g of the tackifying resin and continue stirring for 12 min; Add 0.5 g of the curing agent to obtain the acrylic glue;

[0055] Adopt the microgravure printing process to coat the acrylic glue on the other surface of the corona-treated substrate, with a corona value of 40 dynes; Place it in an oven at 112 °C and dry for 30 s; Place it at 50 °C and cure for 24 h to form a low-viscosity and high-wettability adhesive layer; Obtain the tape.

[0056] The thickness of the low-viscosity and high-wettability adhesive layer is 3.5 μm; The substrate is a PET film with a thickness of 1.8 μm; The release layer is a transparent PET release film with a thickness of 50 μm; The adhesive layer is an acrylic adhesive with a thickness of 1.2 μm.

[0057] Comparative Example 1

[0058] S1. Take the acrylic adhesive, coat it on the substrate by the microgravure coating process to obtain the adhesive layer, and cover the release layer on the adhesive layer;

[0059] S2. Under the protection of a nitrogen atmosphere, take 100 g of polymerized rosin and 1.5 g of zinc oxide, mix and heat with stirring until melted; Heat up to 230 °C and slowly add 39 g of 2-hydroxyethyl methacrylate. After the addition is complete, react until the acid value of the system reaches 1 mg KOH / g; Cool to 80 °C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60 °C to obtain the esterification product;

[0060] Take 100 g of the esterification product, dissolve it in toluene, and under the protection of a nitrogen atmosphere, add 265 g of 1,3-divinyl-2-imidazolidinone and 3.6 g of the initiator azobisisobutyronitrile. Heat up to 120 °C and react for 10 h; Rotate evaporate to remove the solvent and dry in vacuum at 60 °C to obtain the tackifying resin;

[0061] S3. Take 100 g of butyl ester, 200 g of n-heptane, and 100 g of acrylic resin, mix and stir for 12 min; Add 6 g of the tackifying resin and continue stirring for 12 min; Add 0.5 g of the curing agent to obtain the acrylic glue;

[0062] Using the microgravure printing process, acrylic glue is coated on the other surface of the corona-treated substrate with a corona value of 40 dynes; it is dried at 112 °C for 30 s; it is cured at 50 °C for 24 h to form a low-viscosity and high-wettability adhesive layer; the tape is obtained.

[0063] The thickness of the low-viscosity and high-wettability adhesive layer is 3.5 μm; the substrate is a PET film with a thickness of 1.8 μm; the release layer is a transparent PET release film with a thickness of 50 μm; the adhesive layer is an acrylic adhesive with a thickness of 1.2 μm.

[0064] Comparative Example 2

[0065] S1. Take acrylic adhesive, and use the microgravure transfer coating process to coat the substrate to obtain an adhesive layer, and cover a release layer on the adhesive layer;

[0066] S2. Under the protection of a nitrogen atmosphere, take 100 g of polymerized rosin and 1.5 g of zinc oxide, heat and stir until melted; raise the temperature to 230 °C, slowly add 39 g of 2-hydroxyethyl methacrylate, and react until the acid value of the system reaches 1 mg KOH / g after addition; cool to 80 °C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60 °C to obtain an esterification product;

[0067] Take 100 g of the esterification product, dissolve it in toluene, and under the protection of a nitrogen atmosphere, add 116 g of methyl methacrylate and 3.6 g of initiator azobisisobutyronitrile, raise the temperature to 120 °C, and react for 10 h; rotary evaporate to remove the solvent, and dry in vacuum at 60 °C to obtain a tackifying resin;

[0068] S3. Take 100 g of butyl ester, 200 g of n-heptane, and 100 g of acrylic resin, and stir for 12 min; add 6 g of tackifying resin and continue to stir for 12 min; add 0.5 g of curing agent to obtain acrylic glue;

[0069] Using the microgravure printing process, acrylic glue is coated on the other surface of the corona-treated substrate with a corona value of 40 dynes; it is dried at 112 °C for 30 s; it is cured at 50 °C for 24 h to form a low-viscosity and high-wettability adhesive layer; the tape is obtained.

[0070] The thickness of the low-viscosity and high-wettability adhesive layer is 3.5 μm; the substrate is a PET film with a thickness of 1.8 μm; the release layer is a transparent PET release film with a thickness of 50 μm; the adhesive layer is an acrylic adhesive with a thickness of 1.2 μm.

[0071] Comparative Example 3

[0072] S1. Take acrylic adhesive, and use the microgravure transfer coating process to coat the substrate to obtain an adhesive layer, and cover a release layer on the adhesive layer;

[0073] S2. Under the protection of nitrogen atmosphere, take 100 g of polymerized rosin and 1.5 g of zinc oxide, mix them, and heat and stir until melted; raise the temperature to 230 °C, slowly add 23 g of butanol, and react until the acid value of the system reaches 1 mg KOH / g after addition; cool to 80 °C, dissolve in gasoline, filter to remove zinc oxide, evaporate to remove gasoline, wash with water, and dry in vacuum at 60 °C to obtain a tackifying resin.

[0074] S3. Take 100 g of butyl ester, 200 g of n-heptane, and 100 g of acrylic resin, stir for 8 min; add 4 g of tackifying resin and continue to stir for 8 min; add 0.5 g of curing agent to obtain acrylic glue.

[0075] Using the microgravure printing process, coat the acrylic glue on the other surface of the corona-treated substrate, with a corona value of 40 dynes; place it in an oven at 112 °C and dry for 30 s; place it at 50 °C and cure for 24 h to form a low-viscosity and high-wettability adhesive layer; obtain a tape.

[0076] The thickness of the low-viscosity and high-wettability adhesive layer is 3.5 μm; the substrate is a PET film with a thickness of 1.8 μm; the release layer is a transparent PET release film with a thickness of 50 μm; the adhesive layer is an acrylic adhesive with a thickness of 1.2 μm.

[0077] Comparative Example 4

[0078] S1. Take acrylic adhesive, coat it on the substrate using the microgravure transfer coating process to obtain an adhesive layer, and cover a release layer on the adhesive layer.

[0079] S2. Take polymerized rosin as the tackifying resin.

[0080] S3. Take 100 g of butyl ester, 200 g of n-heptane, and 100 g of acrylic resin, stir for 12 min; add 6 g of tackifying resin and continue to stir for 12 min; add 0.5 g of curing agent to obtain acrylic glue.

[0081] Using the microgravure printing process, coat the acrylic glue on the other surface of the corona-treated substrate, with a corona value of 40 dynes; place it in an oven at 112 °C and dry for 30 s; place it at 50 °C and cure for 24 h to form a low-viscosity and high-wettability adhesive layer; obtain a tape.

[0082] The thickness of the low-viscosity and high-wettability adhesive layer is 3.5 μm; the substrate is a PET film with a thickness of 1.8 μm; the release layer is a transparent PET release film with a thickness of 50 μm; the adhesive layer is an acrylic adhesive with a thickness of 1.2 μm.

[0083] Experiment

[0084] Take the tapes obtained in Examples 1-3 and Comparative Examples 1-4, prepare specimens, and detect their properties respectively and record the test results:

[0085] Contact angle test of acrylic glue: Use a contact angle measuring instrument to test the wettability of the specimens. In the experiment, 2 μL of acrylic glue is used, and the experimental temperature is 20 °C;

[0086] Peel strength test: Cement the tape specimens to an ultra-thin steel plate and No. 2 graphite respectively. After standing for 24 h, test the 180° peel strength of the tape.

[0087]

[0088] According to the data in the above table, the following conclusions can be clearly obtained:

[0089] The tapes obtained in Examples 1-3 are compared with the tapes obtained in Comparative Examples 1-4. From the test results,

[0090] Compared with the comparative examples, the tapes obtained in Examples 1-3 have lower peel strength data between the ultra-thin steel plate and No. 2 graphite, and lower contact angle data of the acrylic glue with the ultra-thin steel plate and No. 2 graphite. This fully shows that the present invention has achieved the improvement of the low adhesiveness and high wettability of the prepared tapes.

[0091] Moreover, when the ratios of the solvent, acrylic resin, and curing agent remain unchanged, adjusting the ratio of the tackifying resin has an obvious effect on the adhesiveness of the tape. Among them, for the tape obtained in Example 2, there is no obvious jump point phenomenon in the tensile curve relative to the ultra-thin steel plate, and there is no obvious residual glue on the outer surface of the steel plate. The peel strength relative to the graphite layer can meet the requirements of the actual application end. This formulation is more suitable for the actual application requirements.

[0092] Compared with Example 3, in Comparative Example 1, the tackifying resin replaces 12-hydroxydodecyl methacrylate with an equimolar amount of 2-hydroxyethyl methacrylate; in Comparative Example 2, the tackifying resin replaces 12-hydroxydodecyl methacrylate with an equimolar amount of 2-hydroxyethyl methacrylate and replaces 1,3-divinyl-2-imidazolidinone with an equimolar amount of methyl methacrylate; in Comparative Example 3, the tackifying resin is prepared by the reaction of polymerized rosin and butanol; in Comparative Example 4, the tackifying resin is polymerized rosin. For the tapes obtained in Comparative Examples 1-4, their contact angle and peel strength data are lower, and there is obvious residual glue on the surface of the steel plate. It can be seen that the setting of the tape components and their processes in the present invention can promote the improvement of the low adhesiveness and high wettability.

[0093] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0094] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-viscosity, highly wettable matte black tape, characterized in that: It includes the following structures from top to bottom: a low-viscosity and high-wettability adhesive layer, a substrate, an adhesive layer, and a release layer; The low-viscosity and high-wettability adhesive layer includes the following weight components: 100 parts of butyl ester, 200 parts of n-heptane, 100 parts of acrylic resin, 4 to 6 parts of tackifying resin, and 0.5 part of curing agent; The tackifying resin is prepared by reacting polymerized rosin, 12-hydroxydodecyl methacrylate, and 1,3-divinyl-2-imidazolidinone.

2. The low-viscosity and high-wetting matte black tape according to claim 1, wherein: The thickness of the low-viscosity and high-wettability adhesive layer is 3 to 4 μm.

3. A low-viscosity, highly wettable matte black tape according to claim 1, characterized in that: The substrate is a PET film with a thickness of 1.5 to 1.8 μm.

4. A low-viscosity and highly wettable matte black tape according to claim 1, characterized in that: The release layer is a transparent PET release film with a thickness of 45 to 50 μm.

5. A low-viscosity and highly wettable matte black tape according to claim 1, wherein: The adhesive layer is an acrylic adhesive with a thickness of 1.0 to 1.5 μm.

6. The low-viscosity and highly wettable matte black tape according to claim 1, characterized in that: The specific preparation method of the low-viscosity and high-wettability adhesive layer is as follows: Take butyl ester, n-heptane, and acrylic resin and mix them, stirring for 8 to 12 min; add the tackifying resin and continue stirring for 8 to 12 min; add the curing agent to obtain acrylic glue; Adopt the microgravure printing process to coat the acrylic glue on the surface of the corona-treated substrate; dry it at a temperature of 108 to 112 °C for 10 to 30 s; cure it at a temperature of 45 to 50 °C for 24 h.

7. A low-viscosity and highly wettable matte black tape according to claim 1, characterized in that: The tackifying resin is prepared by the following process: Under the protection of a nitrogen atmosphere, take polymerized rosin and zinc oxide and mix them, heating and stirring until molten; raise the temperature to 210 to 230 °C, slowly add 12-hydroxydodecyl methacrylate, and after the addition, react until the acid value of the system reaches 1 to 10 mgKOH / g to obtain an esterification product; Take the esterification product, dissolve it in toluene, under the protection of a nitrogen atmosphere, add 1,3-divinyl-2-imidazolidinone and an initiator, raise the temperature to 100 to 120 °C, and react for 6 to 10 h to obtain the tackifying resin.

8. A low-viscosity high-wetting matte black tape according to claim 1, characterized in that: The mass ratio of the polymerized rosin, zinc oxide, and 12-hydroxydodecyl methacrylate is 100∶(1.0 to 1.5)∶(80 to 90).

9. A low-viscosity, highly wettable matte black tape according to claim 7, characterized in that: The mass ratio of the esterification product, 1,3-divinyl-2-imidazolidinone, and the initiator is 100∶(200 to 265)∶(3.0 to 3.6).

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