Hydrophilic self-cleaning thermal transfer printing protection thermal transfer ribbon and preparation method thereof

Abstract

The invention relates to a hydrophilic self-cleaning thermal transfer protection thermal transfer ribbon and a preparation method thereof, and relates to the technical field of thermal transfer printing. The hydrophilic self-cleaning thermal transfer printing protection thermal transfer ribbon comprises a bonding layer, a protection layer, a release layer, a base material and a back coating layer which are sequentially arranged from top to bottom, the protective layer comprises the following raw materials in parts by mass: 20-30 parts of epoxy resin, 5-10 parts of a curing agent, 5-10 parts of nano filler, 15-20 parts of a modifier and 10-50 parts of a hydrophilic compound. After the hydrophilic self-cleaning thermal transfer printing protection thermal transfer ribbon is subjected to thermal transfer printing, the protection layer is printed on the outer layer of a printing stock, sufficient light resistance and weather resistance are provided for the printing stock, meanwhile, the excellent antifouling characteristic is achieved, pollution of outdoor organic oil phases, sand wind and adhesive stains can be effectively resisted, and the service life of the thermal transfer printing protection thermal transfer ribbon is prolonged. And dirt cleaning and film surface repairing can be achieved in the process of making contact with water, and the problem that the surface of the heat transfer printing mark is dirty under the extreme outdoor condition is solved.

Description

Technical Field

[0001] This invention relates to the field of thermal transfer printing technology, specifically to a hydrophilic self-cleaning thermal transfer protective ribbon and its preparation method. Background Art

[0002] Currently, using thermal transfer or inkjet printing to color road traffic reflective film is a relatively reliable and economical method. Road traffic reflective film prepared using these methods needs to be used outdoors year-round, placing high demands on its weather resistance and, more importantly, its self-cleaning function. A common approach is to add a transparent protective film over the ink. This protective film, in addition to providing some UV protection, also needs to have self-cleaning properties, preventing dirt and oil buildup, isolating moisture, and preventing dust and sand from accumulating on the reflective film surface and affecting its color and reflective performance.

[0003] The most widely used self-cleaning technology for reflective film surfaces is superhydrophobic self-cleaning, which relies on the "lotus leaf self-cleaning effect"—the micro-nano structure of the film surface increases the contact angle of water droplets, causing them to roll off. Superhydrophilic coatings, as extremely wettable surfaces, effectively isolate contaminants or dust from the reflective film surface upon contact with water in the air, allowing them to fall off naturally. This effectively achieves oil-water separation while isolating the underlying layer from the air, thus reducing surface drag and preventing fogging.

[0004] During outdoor use, superhydrophilic coatings are susceptible to environmental influences, leading to external damage and defects such as fine cracks. This results in decreased surface hydrophilicity and a shortened lifespan. Therefore, the self-healing function of superhydrophilic coatings is extremely important. By utilizing the reversibility of hydrogen bonding and electrostatic effects, surface structural damage can be effectively repaired, solving structural damage problems. However, due to environmental and external factors, the self-healing ability of reversible dynamic bonds is limited and cannot provide stable repair.

[0005] Based on this, the present invention prepares a heat transfer protective carbon ribbon with self-healing, hydrophilic and self-cleaning properties for use in the production of road traffic reflective film marking patterns by heat transfer. Summary of the Invention

[0006] To address the aforementioned technical problems, the present invention aims to provide a hydrophilic self-cleaning heat transfer protective ribbon and its preparation method. After heat transfer, the hydrophilic self-cleaning heat transfer protective ribbon of the present invention has its protective layer printed on the outer layer of the substrate, providing the substrate with sufficient light and weather resistance. It also possesses excellent anti-fouling properties, effectively resisting outdoor organic oil phases, windblown sand, and adhesive stains. Furthermore, it can clean stains and repair the film surface during contact with the aqueous phase, solving the problem of surface dirt on heat transfer markings under extreme outdoor conditions.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] The purpose of this invention is to provide a hydrophilic self-cleaning heat transfer protective ribbon, comprising, from top to bottom, an adhesive layer, a protective layer, a release layer, a substrate, and a back coating layer;

[0009] The protective layer comprises the following raw materials in parts by weight: 20-30 parts epoxy resin, 5-10 parts curing agent, 5-10 parts nanofiller, 15-20 parts modifier, and 10-50 parts hydrophilic compound.

[0010] The beneficial effects of this invention are as follows: The thermal transfer ribbon structure of this invention consists of an adhesive layer, a protective layer, a release layer, a substrate, and a back coating layer sequentially bonded together from top to bottom. After thermal transfer, the protective layer is printed on the outer layer of the substrate, providing the substrate with sufficient light and weather resistance, while also possessing a hydrophilic self-cleaning function. The protective layer is characterized by its main components being epoxy resin and hydrophilic compounds. After curing with a curing agent, a hydrophilic coating forms on the surface. It is also combined with nanofillers to form a super-hydrophilic protective layer with a micro-nano structure, exhibiting excellent anti-fouling properties. During outdoor use, it can repair surface structural damage in situ and restore the super-hydrophilic state, effectively resisting outdoor organic oil phases, wind and sand, and adhesive stains. It can also repair cracked structural damage and restore surface wettability through in-situ pressing during contact with water phases, achieving stain removal and film repair. In addition, it has a super-hydrophilic self-cleaning function in the super-hydrophilic, dirt-resistant, oil-proof, and gas-barrier function on the surface of road traffic reflective film, solving the problem of surface dirt on heat transfer markings under extreme outdoor conditions.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the curing agent is at least one of amine curing agents and amine-modified cashew nut shell curing agents; the nanofiller is at least one of silica, graphene oxide, PMMA particles, boron nitride, and talc; the modifier is at least one of fatty amines, alkyl thiols, fatty alcohols, and fatty acids; and the hydrophilic compound is at least one of polyethyleneimine, glycidyltrimethylammonium chloride, polyaniline, silica, silver nanoparticles, and graphene oxide.

[0013] Furthermore, the amine curing agent includes at least one of polyetheramine, m-phenylenediamine, and octyldiamine.

[0014] Furthermore, the nanofiller includes at least one of silicon dioxide, graphene oxide, PMMA particles, boron nitride, and talc.

[0015] Furthermore, the nanofiller is nanoscale PMMA particles.

[0016] Furthermore, the modifier is at least one of fatty amines, alkyl thiols, fatty alcohols, and fatty acids, preferably fatty acids, and lauric acid is preferred among fatty acids.

[0017] Furthermore, the epoxy resin includes at least one of bisphenol A type epoxy resin and bisphenol F type epoxy resin.

[0018] Furthermore, the bisphenol A type epoxy resin is at least one of E51 epoxy resin and E55 epoxy resin, and the bisphenol F type epoxy resin is at least one of F51 epoxy resin and F48 epoxy resin.

[0019] Furthermore, the substrate includes at least one of polypropylene film (PP film), polyethylene naphthalate film (PEN film), polyethylene terephthalate film (PET film), polyethylene film (PE film), polyvinyl alcohol film (PVA film), and polymethyl methacrylate film (PMMA film).

[0020] Furthermore, the adhesive layer comprises the following raw materials in parts by weight: 9 to 11 parts of thermoplastic acrylic resin.

[0021] The beneficial effects of adopting the above-mentioned further solution are: in order to make the protective layer better adhere to the transfer body and adapt to a variety of different substrates, an adhesive layer is provided on the side of the protective layer away from the substrate, and the thermoplastic acrylic resin in the adhesive layer can provide good adhesion and aging resistance.

[0022] Furthermore, the back coating comprises the following raw materials in parts by weight: 2-5 parts of granules, 1-3 parts of lubricant, and 18-22 parts of resin.

[0023] Furthermore, the resin for the back coating is not particularly limited and can be acrylic resin, cellulose resin, fluorocarbon resin, silicone resin, polycarbonate resin, polyvinyl alcohol acetal resin, or polyvinyl alcohol resin, etc. Preferably, it is a resin that can be cross-linked and cured with a cross-linking agent.

[0024] Furthermore, the lubricant includes at least one of the following: silicone oil, polyethylene wax, paraffin wax, higher fatty acid esters, higher fatty amides, higher aliphatic alcohols, organopolysiloxanes, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, fluorinated surfactants, organic carboxylic acids and their derivatives, and metallic soaps. The particles include at least one of organic particles and inorganic particles. Organic particles include fluorinated particles, acrylic particles, nylon particles, PTFE (polytetrafluoroethylene) particles, styrene particles, and nylon particles; inorganic particles include silica, oxidizing agents, and talc.

[0025] The beneficial effect of adopting the above-mentioned further solution is that the back coating contains lubricant and particles, which makes the back coating have good sliding properties.

[0026] Furthermore, the release layer comprises the following raw materials in parts by weight: 1 to 3 parts of adhesive resin and 7 to 9 parts of wax powder.

[0027] Furthermore, the adhesive resin includes at least one of acrylic resins, vinyl chloride-vinyl acetate resins, vinyl chloride-vinyl isobutyl ether resins, polyurethane resins, ethylene-vinyl acetate resins, rosin resins, terpene resins, and polyester resins.

[0028] Furthermore, the adhesive resin is an ethylene-vinyl acetate derivative.

[0029] Furthermore, the wax powder includes at least one of Fischer-Tropsch wax, polyethylene wax (PE wax), polytetrafluoroethylene wax, polypropylene wax (PP wax), ethylene-vinyl acetate copolymer wax (EVA wax), oxidized polyethylene wax, carnauba wax, and beeswax, as well as substances that have undergone chemical modification of the above wax powders.

[0030] Furthermore, the wax powder in the release layer is preferably polyethylene, and more preferably polytetrafluoroethylene modified polyethylene wax powder.

[0031] The beneficial effects of adopting the above-mentioned further solution are: to ensure better separation between the protective layer and the substrate during heat transfer, it is necessary to set a release layer between the protective layer and the substrate. At the same time, the release layer on the surface of the protective layer after heat transfer also provides a smoothing effect, improving the protective layer's abrasion resistance.

[0032] Furthermore, the thickness of the substrate is 4–25 μm, the thickness of the adhesive layer is 0.1–2.0 μm, the thickness of the release layer is 0.1–2.0 μm, the thickness of the protective layer is 0.5–20.0 μm, and the thickness of the back coating layer is 0.2–1.2 μm.

[0033] Furthermore, the thickness of the substrate is 4–10 μm, the thickness of the adhesive layer is 0.2–0.4 μm, the thickness of the release layer is 0.2–0.6 μm, the thickness of the protective layer is 0.5–20.0 μm, and the thickness of the back coating layer is 0.2–1.0 μm.

[0034] The second objective of this invention is to provide a method for preparing a hydrophilic self-cleaning thermal transfer protective ribbon, comprising the following steps:

[0035] S1: Liquid preparation:

[0036] Release liquid: Mix and dissolve adhesive resin and wax powder together to prepare a release liquid for later use; Protective liquid: Dissolve epoxy resin, curing agent, nanofiller, modifier, and hydrophilic compound in a solvent to prepare a protective liquid for later use; Adhesive liquid: Dissolve thermoplastic acrylic resin in a solvent to prepare an adhesive liquid for later use; Back coating liquid: Dissolve particles, lubricant, and resin in a solvent to prepare a back coating liquid for later use;

[0037] S2: Preparation of the back coating layer: The back coating liquid is applied to one side of the substrate layer and then dried to form the back coating layer; Preparation of the release layer: The release liquid is applied to one side of the substrate layer away from the back coating layer and then dried to form the release layer; Preparation of the protective layer: The protective liquid is applied to one side of the release layer away from the substrate layer and then dried to form the protective layer; Preparation of the adhesive layer: The adhesive liquid is applied to one side of the protective layer away from the substrate layer and then dried to form the adhesive layer; thereby obtaining a hydrophilic self-cleaning heat transfer protective ribbon.

[0038] Furthermore, the drying temperature is 60–80°C, and the drying time is 0.5–3 hours. Attached Figure Description

[0039] Figure 1 This is a structural diagram of the thermal transfer ribbon prepared in Example 1 of the present invention.

[0040] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0041] 1-Adhesive layer, 2-Protective layer, 3-Release layer, 4-Substrate layer, 5-Back coating layer. Detailed Implementation

[0042] The principles and features of this invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. Where specific techniques or conditions are not specified in the embodiments, they should be performed according to the techniques or conditions described in the literature in this field, or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased through legitimate channels.

[0043] Example 1: Preparation of a hydrophilic self-cleaning heat transfer protective ribbon

[0044] S1: Liquid preparation:

[0045] Release solution: 2 parts ethylene-vinyl acetate copolymer (Mitsui Chemicals 210W) and 8 parts PE wax powder (Angel Wax Powder PEW-0200) are dissolved together in 30 parts 2-butanone and 60 parts toluene to obtain a dispersion. This dispersion is then ground using a horizontal grinder (zirconium bead particle size 0.6mm) to achieve an average particle size D50 of 0.1–0.4 μm, thus preparing the release solution for later use. Protective solution: 20–30 parts E51 epoxy resin (Dow DER331), 5–10 parts amine curing agent (T31), 5–10 parts nanofiller (Shin-Etsu KMP590), and 15–20 parts fatty acid modifier (lauric acid) are dissolved in 600–700 parts ethyl acetate to obtain a mixed solution. Solution A: Dissolve 10-50 parts of silicone resin (Shin-Etsu KMP590) in 100-500 parts of ethanol to obtain mixed solution B. Mix mixed solution A and mixed solution B are then mixed to prepare a protective solution for later use. Adhesive solution: Dissolve 10 parts of thermoplastic acrylic resin (BR-83 Mitsubishi Chemical Co., Ltd.) in 45 parts of 2-butanone and 45 parts of toluene to prepare an adhesive solution for later use. Back coating solution: Dissolve 10 parts of polyurethane modified silicone resin (Shin-Etsu KR-500), 10 parts of acrylic modified silicone resin (Berkel UCB3310), 3 parts of zinc stearate (Maclean), and 2 parts of dioleyl ester (Maclean) in 40 parts of 2-butanone and 35 parts of toluene to prepare a back coating solution for later use.

[0046] S2: Preparation of back coating layer 5: A 4.5 μm thick PET film is used as the substrate layer 4. A 60% corona discharge is applied to one side of the substrate layer 4. The back coating liquid is then applied to the 4.5 μm thick PET film (Lumirror) using gravure coating. TM The process involves: applying a release liquid to the corona-exposed side of the substrate layer 1, then drying it at 60–80°C for 0.5–3 hours to form a 0.4 μm back coating 5; preparing the release layer 3: applying the release liquid to one side of the substrate layer 1 away from the back coating 5, then drying it at 60–80°C for 0.5–3 hours to form a 0.2 μm release layer 3; preparing the protective layer 2: applying the protective liquid to one side of the release layer 3 away from the substrate layer 4, then drying it at 60–80°C for 0.5–3 hours to form a 3 μm protective layer 2; preparing the adhesive layer 1: applying the adhesive liquid to one side of the protective layer 2 away from the substrate layer 4, then drying it at 60–80°C for 0.5–3 hours to form a 0.8 μm adhesive layer 1; thus obtaining a hydrophilic self-cleaning thermal transfer protective ribbon, such as... Figure 1 As shown.

[0047] Examples 2-4: Preparation of hydrophilic self-cleaning thermal transfer protective ribbons

[0048] Examples 2-4 are the same as Example 1, except that the epoxy resin used for the protective layer is different. All other steps and raw materials are the same as in Example 1. The specific raw materials for the protective layer are shown in Table 1.

[0049] Table 1

[0050]

[0051]

[0052] Examples 5-6: Preparation of hydrophilic self-cleaning thermal transfer protective ribbon

[0053] Examples 5 and 6 are the same as Example 1, except that the hydrophilic compound used in the protective layer is different. The other steps and raw materials are the same as in Example 1. The specific raw materials for the protective layer are shown in Table 2.

[0054] Table 2

[0055] raw material Number of copies Purchase source Example 5 Polyethyleneimine 10-50 servings Maclean Example 6 Fumed silica 20-30 servings Evonik R812

[0056] Comparative Example 1: Preparation of a hydrophilic self-cleaning thermal transfer protective ribbon

[0057] Comparative Example 1 is the same as Example 1, except that no protective layer was prepared. All other steps and raw materials are the same as in Example 1.

[0058] Comparative Example 2: Preparation of a hydrophilic self-cleaning thermal transfer protective ribbon

[0059] Comparative Example 2 is the same as Example 1, except that the raw material for the protective layer is different. All other steps and raw materials are the same as in Example 1. The specific raw materials for the protective layer are shown in Table 3.

[0060] Table 3

[0061]

[0062]

[0063] Comparative Example 3: Preparation of a hydrophilic self-cleaning thermal transfer protective ribbon

[0064] Comparative Example 3 is the same as Example 1, except that the raw material for the protective layer is different. All other steps and raw materials are the same as in Example 1. The specific raw materials for the protective layer are shown in Table 4.

[0065] Table 4

[0066] raw material Number of copies Purchase source thermoplastic resin 25-40 servings MB-2660 Mitsubishi Chemical Corporation Nanofillers 5-10 servings Shin-Etsu KMP590 Lauric acid 15-20 servings Maclean Ethyl acetate 600-700 copies Maclean silicone resin 10-50 servings Shin-Etsu KMP590 ethanol 100-500 copies Maclean

[0067] Comparative Example 4: Preparation of a hydrophilic self-cleaning thermal transfer protective ribbon

[0068] Comparative Example 4 is the same as Example 1, except that the raw material for the protective layer is different. All other steps and raw materials are the same as in Example 1. The specific raw materials for the protective layer are shown in Table 5.

[0069] Table 5

[0070] raw material Number of copies Purchase source thermoplastic resin 65-120 servings MB-2660 Mitsubishi Chemical Corporation Ethyl acetate 700-1200 copies Maclean

[0071] Experimental Example: Performance Testing

[0072] Sample preparation: Using the DTP-1500 traffic printer developed by our company, the high weather-resistant yellow ribbon (Hunan Dingyi) was transferred onto 3M Class V reflective film, and then the thermal transfer ribbons of Examples 1-6 and Comparative Examples 1-4 were simultaneously transferred onto the ink layer.

[0073] (1) Transmittance of protective layer: The retroreflection coefficient before and after the transfer of protective layer was tested using a retroreflection test system (observation angle 0.2°, incident angle -4°). The transmittance was calculated using the following formula: Transmittance = Retroreflection coefficient after transfer of protective layer / Retroreflection coefficient without transfer of protective layer × 100%.

[0074] (2) Stain resistance: The test was conducted in accordance with the national standard GB-T 9780-2013 Test method for stain resistance of architectural coatings.

[0075] (3) Adhesion: The test was conducted in accordance with the national standard GB / T 9286—2021 Cross-cut test for paints and varnishes.

[0076] (4) Weather resistance: Refer to the xenon lamp aging conditions in the national standard GB / T 18833-2012 Road Traffic Reflective Film, use a xenon lamp aging test chamber to age for 1800 hours, observe whether wrinkles, bubbles, cracks or other phenomena appear on the surface; and measure the color difference value before and after 1800 hours of accelerated aging.

[0077] (5) Self-healing performance: Underwater cross-cut test is conducted. A grid of a certain size is cut on the coating surface using a cross-cutting tool. After the coating is damaged, the surface cracks are observed to recover and whether the surface wettability is restored by pressing in situ.

[0078] (6) Underwater oil contact angle: The pendant drop method is used, in which an oil droplet is suspended near the surface of a solid sample immersed in water using a syringe or similar tool. Under the influence of gravity and surface tension, the oil droplet forms a certain contact shape with the reflective film surface. The contact angle is determined by observing and analyzing the shape of the oil droplet. The Young-Laplace equation is used to calculate the contact angle by analyzing the shape of the oil droplet.

[0079] (7) Water contact angle in air: The method is the same as that for underwater oil contact angle testing. A droplet is suspended under a needle or thin tube, allowing the droplet to contact the surface of the reflective film. The contact angle is calculated by analyzing the shape of the oil droplet using the Young-Laplace equation.

[0080] (8) Solvent wiping test: For the reflective film sample obtained by DTP1500 transfer, load a 1000g weight onto the reflective film color block and wrap it with cotton cloth soaked in 0.5ml of ethanol, then rub the color block back and forth 100 times. Visually confirm the formed image and evaluate it according to the following criteria: no color fading is considered a pass. The gasoline test method is the same.

[0081] The experiment was repeated three times, and the results are shown in Table 6.

[0082] Table 6

[0083]

[0084]

[0085] Table 7

[0086]

[0087]

[0088] From Tables 6 and 7, we can obtain:

[0089] Through various performance tests, the thermal transfer ribbons of Examples 1-6 showed good self-healing properties, capable of repairing scratches and restoring surface hydrophilicity in water. They also exhibited good light transmittance, stain resistance, adhesion, and weather resistance. In contrast, the ribbons of Comparative Examples 1-4 showed significant color differences before and after 1800 hours of aging, poor weather resistance, and were not resistant to staining or had poor adhesion.

[0090] In summary, the heat transfer ribbon with a protective layer prepared by this invention prints the front layer of the ribbon onto the substrate. After the protective layer comes into contact with moisture in the air, it forms a film, which functions as surface wetting, oil and dirt prevention, and water and vapor barrier. It provides excellent protection for the coating under the protective ribbon. At the same time, structural parts damaged by external environmental forces can achieve self-repair through in-situ pressing and other methods.

[0091] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydrophilic self-cleaning thermal transfer protective carbon ribbon, characterized in that: The thermal transfer protective carbon tape comprises an adhesive layer, a protective layer, a release layer, a substrate and a back coating layer which are arranged in sequence from top to bottom; The protective layer comprises the following raw materials in parts by mass: 20 to 30 parts of epoxy resin, 5 to 10 parts of curing agent, 5 to 10 parts of nano filler, 15 to 20 parts of modifier, and 10 to 50 parts of hydrophilic compound.

2. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The curing agent is at least one of an amine curing agent and an amino-modified cardanol curing agent; the nanofiller is at least one of silicon dioxide, graphene oxide, PMMA particles, boron nitride, and talc; the modifier is at least one of aliphatic amines, alkyl mercaptans, aliphatic alcohols, and fatty acids; the hydrophilic compound is at least one of polyethyleneimine, epoxypropyltrimethylammonium chloride, polyaniline, silicon dioxide, silver nanoparticles, and graphene oxide.

3. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The epoxy resin includes at least one of bisphenol A epoxy resin and bisphenol F epoxy resin.

4. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The substrate includes at least one of a polypropylene film, a polyethylene naphthalate film, a polyethylene terephthalate film, a polyethylene film, a polyvinyl alcohol film, and a polymethyl methacrylate film.

5. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The adhesive layer comprises the following raw materials in parts by weight: 9 to 11 parts of thermoplastic acrylic resin.

6. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The back coating layer comprises the following raw materials in parts by weight: 2 to 5 parts of particles, 1 to 3 parts of lubricant, and 18 to 22 parts of resin.

7. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The release layer comprises the following raw materials in parts by weight: 1 to 3 parts of adhesive resin and 7 to 9 parts of wax powder.

8. The hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 1, characterized in that: The thickness of the substrate is 4-25 μm, the thickness of the adhesive layer is 0.1-1.0 μm, the thickness of the release layer is 0.1-2.0 μm, the thickness of the protective layer is 0.5-20.0 μm, and the thickness of the back coating layer is 0.2-1.0 μm.

9. A method for preparing a hydrophilic self-cleaning thermal transfer protective carbon ribbon according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1: Prepare solution: Release liquid: Mix and dissolve the adhesive resin and wax powder together to make a release liquid for standby use; Protective liquid: Dissolve the epoxy resin, curing agent, nano filler, modifier, and hydrophilic compound in a solvent and mix and dissolve them to make a protective liquid for standby use; Adhesive liquid: Dissolve the thermoplastic acrylic resin in a solvent to make an adhesive liquid for standby use; Back coating liquid: Dissolve the particles, lubricant, and resin in a solvent to make a back coating liquid for standby use; S2: Preparation of back coating layer: coating the back coating liquid on one side of the substrate layer, and then drying to form the back coating layer; Preparation of release layer: coating the release liquid on one side of the substrate layer away from the back coating layer, and then drying to form the release layer; Preparation of protective layer: coating the protective liquid on one side of the release layer away from the substrate layer, and then drying to form the protective layer; Preparation of bonding layer: coating the bonding liquid on one side of the protective layer away from the substrate layer, and then drying to form the bonding layer; thereby obtaining a hydrophilic self-cleaning thermal transfer protective carbon tape.

10. The method for preparing a hydrophilic self-cleaning thermal transfer protective carbon ribbon according to claim 9, characterized in that: The drying temperature is 60-80° C. and the drying time is 0.5-3 h.

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