Resin thermal transfer ribbon for thermal transfer printing outdoor identification and preparation method of resin thermal transfer ribbon

Abstract

The invention relates to a resin thermal transfer ribbon for thermal transfer outdoor identification and a preparation method of the resin thermal transfer ribbon, and relates to the technical field of thermal transfer printing. The resin thermal transfer ribbon for the thermal transfer printing outdoor identification comprises a back coating layer, a base body, a stripping layer and a pigment layer which are sequentially arranged from top to bottom. The stripping layer is prepared from the following raw materials in parts by weight: 5 to 20 parts of ethylene-vinyl acetate copolymer and 80 to 95 parts of wax; the pigment layer is prepared from the following raw materials in parts by weight: 7 to 8.8 parts of vinyl chloride-vinyl acetate resin, 1.2 to 2.5 parts of methacrylic acid copolymer, 10 to 11 parts of pigment and 0.05 to 0.2 part of plasticizer. The resin thermal transfer ribbon for the thermal transfer printing outdoor identification can realize digital printing, has excellent light resistance and weather resistance, does not release pollutants in the printing process, and is good in environmental protection property.

Description

Technical Field

[0001] The invention relates to the technical field of thermal transfer printing, and in particular to a resin carbon ribbon for thermal transfer outdoor marking and a preparation method thereof. Background Art

[0002] Existing outdoor signs generally use enamel signboards and metal signboards. Such signs consume a lot of energy and generate a lot of pollution during the production process. As environmental protection requirements become increasingly stringent, the use of such signs will gradually decrease in the future. Along with this, various new types of sign preparation processes have emerged. Among them, the preparation of signs by digital printing has gradually become the main preparation process for signs due to its convenience and large operating space. In digital printing, UV inkjet printing and thermal transfer are the two most representative digital printing methods. The logo pattern is formed on the PVC tape by UV inkjet printing or thermal transfer. Since UV inkjet printing signboards release a large amount of unpolymerized monomer small molecules during the production process, it is impossible to fundamentally solve the pollution problem. Therefore, thermal transfer printing for outdoor signs will become the main process for outdoor sign preparation in the future. However, in the existing thermal transfer signs, the reliability of thermal transfer carbon ribbons is poor, resulting in insufficient reliability of outdoor signs when used. In view of the problem of poor reliability of thermal transfer signs when used outdoors, the present invention provides a resin carbon ribbon for thermal transfer outdoor signs and a preparation method thereof. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a resin carbon ribbon for thermal transfer outdoor marking and a preparation method thereof. The purpose is to realize digital printing, and to have excellent light resistance and weather resistance, and to release no pollutants during the printing process, and to have a resin carbon ribbon for thermal transfer outdoor marking with good environmental protection.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] In a first aspect, a resin carbon ribbon for thermal transfer outdoor marking comprises a back coating layer, a substrate, a peeling layer and a pigment layer arranged in sequence from top to bottom;

[0006] The peeling layer comprises the following raw materials in parts by weight: 5-20 parts of ethylene-vinyl acetate copolymer and 80-95 parts of wax;

[0007] The pigment layer comprises the following raw materials in parts by weight: 7-8.8 parts of chloroacetic acid resin, 1.2-2.5 parts of methacrylic acid copolymer, 10-11 parts of pigment, and 0.05-0.2 parts of plasticizer.

[0008] The beneficial effects of the present invention are as follows: the ethylene-vinyl acetate copolymer in the peeling layer of the present invention provides good film-forming property, ensures good adhesion to the substrate, and has good compatibility with the wax, ensuring uniform distribution and coating property of the wax in the peeling layer; the wax in the peeling layer of the present invention provides good peeling property and resolution of the printed pattern during printing, as well as excellent wear resistance of the pattern after printing; the methacrylic acid copolymer in the pigment layer of the present invention has good light transmittance, good light resistance and weather resistance, and good peeling transfer property, which can ensure that the carbon ribbon has good transfer ability, but if the content of the methacrylic acid copolymer is too low, the adhesion and solvent resistance will be reduced, and if it is too high, it will lead to The resolution is insufficient during transfer, and the temperature required for transfer is too high; the chloroacetic acid resin in the pigment layer of the present invention has excellent pigment dispersibility and film-forming properties, which provides good help for the coating and film-forming of the carbon ribbon, and at the same time has good adhesion to the substrate, ensuring the good foil retention of the carbon ribbon ink. The high polar groups contained in it have good transfer adaptability, adhesion and alcohol resistance on the tape after transfer, but the chloroacetic acid resin content in the pigment layer is too high, which will lead to uneven peeling during transfer and incomplete transfer; in short, the resin carbon ribbon for thermal transfer outdoor marking of the present invention can realize digital printing, and has excellent light resistance and weather resistance, and no pollutants are released during printing, which is environmentally friendly.

[0009] Based on the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the VA (acetic acid) content of the ethylene-vinyl acetate copolymer in the peeling layer is 18-30%, preferably 28, and the melt index is 10-100, preferably 25;

[0011] The wax in the peeling layer includes at least one of PE wax, PP wax and Fischer-Tropsch wax; the particle size of the wax is 1um-10um, and the melting point of the wax is 80°C-120°C.

[0012] The beneficial effect of adopting the above further solution is that the ethylene-vinyl acetate resin under this condition further ensures the consistency of pattern transfer during transfer.

[0013] Furthermore, the vinyl chloride content of the chlorovinyl resin in the pigment layer is greater than 85%, and the degree of polymerization is greater than 15;

[0014] The methacrylic acid copolymer in the pigment layer has a molecular weight of 30000<Mn<80000, preferably Mn<40000, and a temperature of 60℃<Tg<100℃, preferably below 80℃;

[0015] The pigment in the pigment layer includes at least one of a yellow pigment (such as 110 yellow), a red pigment (such as 254 red), a blue pigment (phthalocyanine blue), a green pigment (phthalocyanine green), and a black pigment (carbon black);

[0016] The plasticizer in the pigment layer includes at least one of epoxy soybean oil, dioctyl phthalate and dibutyl phthalate.

[0017] The beneficial effects of adopting the above further scheme are: the above-mentioned type of pigment selected has good light resistance and weather resistance, which can ensure the reliability of the printed pattern for outdoor use. Insufficient pigment content in the pigment layer will lead to a decrease in light resistance and weather resistance; the use of plasticizers can improve the reliability of the printed pattern.

[0018] Furthermore, the thickness of the peeling layer is 0.2μm-0.6μm, preferably 0.2μm-0.4μm, such as 0.2μm, 0.4μm, etc.; the thickness of the pigment layer is 0.6μm-1.2μm, preferably 0.8μm-1.0μm, such as 0.6μm, 0.8μm, etc.

[0019] The beneficial effect of adopting the above further scheme is: the peeling layer of the present invention can ensure the good peeling property, wear resistance and solvent resistance of the resin carbon ribbon when peeling when it is peeled off. If it is lower than this thickness, the peeling property decreases during printing and cannot be completely transferred, and the wear resistance of the pattern after printing decreases. If it is higher than this thickness, the surface of the printed pattern will produce fogging due to the excessive thickness of the wax layer.

[0020] Furthermore, the back coating layer comprises the following raw materials in parts by weight: 5-20 parts of main resin, 0.25-1 parts of high-adhesive resin, 0.3-1.5 parts of lubricant, 0.25-1 parts of filler, 0.15-0.6 parts of antistatic agent, and 1-4 parts of crosslinking agent.

[0021] The back coating layer includes at least one of a leveling agent and a dispersant.

[0022] The beneficial effects of adopting the above further solution are: the back coating can prevent adverse effects such as stickiness or wrinkles caused by heating by the temperature-sensitive heating head during thermal transfer; and the filler has a self-cleaning effect.

[0023] Furthermore, the main resin in the back coating layer includes at least one of cellulose acetate propionate, polyvinyl acetal resin, and polyvinyl butyral resin;

[0024] The high-adhesive resin in the back coating layer includes at least one of a polyester resin and a polyurethane resin;

[0025] The lubricant in the back coating layer includes at least one of phosphate ester, zinc stearate, glyceryl dioleate, and glyceryl monooleate;

[0026] The filler in the back coating layer includes at least one of talc, kaolin, calcium carbonate, aluminum hydroxide, silicon dioxide, graphite, and boron nitride;

[0027] The cross-linking agent includes an isocyanate compound.

[0028] Furthermore, the back coating layer has a thickness of 0.1 μm-0.5 μm, preferably 0.2 μm-0.4 μm, such as 0.1 μm, 0.2, 0.5 μm, and the like.

[0029] Further, the substrate includes any one of polyethylene terephthalate (PET) film, 1,4-polycyclohexylene dimethylene terephthalate film, polyethylene naphthalate (PEN) film, polyphenylene sulfide film, polystyrene (PS) film, polypropylene (PP) film, polyethylene (PE) film, polyvinyl chloride film, nylon film, and polyimide film. The thickness of the substrate is 4 μm-10 μm, preferably 4 μm-6 μm.

[0030] In a second aspect, a method for preparing a resin ribbon for thermal transfer outdoor marking comprises the following steps:

[0031] S1: Prepare solution:

[0032] Prepare back coating liquid, stripping layer liquid and pigment layer liquid respectively and set aside;

[0033] S2: stunning;

[0034] Providing a substrate, and applying corona to both surfaces of the substrate;

[0035] S3: coating;

[0036] Applying the back coating liquid prepared in step S1 on one surface of the substrate in step S2, and then drying to form a back coating for standby use;

[0037] The peeling layer liquid obtained in step S1 is coated on the surface of the substrate away from the back coating layer, and then dried to form a peeling layer for standby use;

[0038] The pigment layer liquid obtained in step S1 is coated on the surface of the peeling layer away from the substrate, and then dried to form a pigment layer.

[0039] Further, in step S3, a ceramic anilox roller with a precision of 280 lines is used in the preparation of the back coating layer, and a gravure coater is used to coat the back coating liquid, the coating speed is 60-100 m / min, the drying temperature is 60° C.-100° C., and the drying time is 5s-30s;

[0040] In step S3, the peeling layer is prepared by using a ceramic anilox roller with a precision of 280 lines, and a gravure coater is used to coat the peeling layer liquid. The coating speed is 60-100 m / min, the drying temperature is 80° C.-100° C., and the drying time is 5s-30s.

[0041] In step S3, a ceramic anilox roller with a precision of 300-340 lines is used in the preparation of the pigment layer, and a gravure coater is used to coat the pigment layer liquid. The coating speed is 60-100 m / min, the drying temperature is 80° C.-100° C., and the drying time is 5s-30s. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the structure of the carbon ribbon of the present invention;

[0043] Figure 2 Figure printed for the present invention.

[0044] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0045] 1. Substrate, 2. Peeling layer, 3. Pigment layer, 4. Back coating layer. DETAILED DESCRIPTION

[0046] The principles and features of the present invention are described below, and the examples are only used to explain the present invention and are not used to limit the scope of the present invention. If no specific technology or conditions are specified in the embodiments, the technology or conditions described in the literature in this field or the product instructions are used. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased through regular channels.

[0047] Examples 1-6

[0048] The present embodiment relates to a thermal transfer outdoor marking resin ribbon, which comprises a back coating layer 4, a substrate 1, a peeling layer 2 and a pigment layer 3 arranged in sequence from top to bottom. Figure 1 ).

[0049] The present embodiment relates to a method for preparing a resin carbon ribbon for thermal transfer outdoor marking, comprising the following steps:

[0050] S1: Prepare solution:

[0051] ① Weigh the raw materials of back coating layer 4 according to the following weight parts to prepare back coating layer 4 liquid: 60 parts of 2-butanone, 25 parts of toluene, 10 parts of cellulose acetate propionate, 0.5 parts of polyester resin, 0.3 parts of zinc stearate, 0.25 parts of phosphate ester, 0.2 parts of glycerol dioleate, 2 parts of isocyanate, 0.3 parts of talc, 0.2 parts of silicon dioxide, 0.3 parts of antistatic agent,

[0052] First, cellulose acetate propylene and polyester resin are added to a mixed solvent of 2-butanone and toluene to dissolve, and then zinc stearate, phosphate ester, glycerol dioleate, talc, silica and antistatic agent are added and stirred for 2 hours, and then isocyanate is added and stirred for 0.5 hours to obtain a back coating 4 liquid.

[0053] ② The raw materials of the peeling layer 2 were weighed according to the following weight parts, as shown in Table 1, and the peeling layer 2 liquid was prepared.

[0054] Preparation of peeling layer 2 liquid:

[0055] Table 1 Raw materials for peeling layer 2 in Examples 1-6

[0056] Example 1 2 3 4 5 6 Ethylene-vinyl acetate copolymer / part 1 1 1.5 1.5 2 2 PE wax / part 9 9 8.5 8.5 8 8 2-Butanone / part 30 30 30 30 30 30 Toluene / part 60 60 60 60 60 60

[0057] Among them, the VA (acetic acid) content in ethylene-vinyl acetate copolymer is 28 and the melt index is 25.

[0058] First, ethylene-vinyl acetate is added to toluene, and then heated to dissolve, and then PE wax powder is added, stirred evenly, and then ground and dispersed using a sand mill to a particle size D50 < 0.3 um to obtain a peeling layer 2 coating liquid;

[0059] ③ Weigh the raw materials of pigment layer 3 according to the following weight parts, as shown in Table 2, and prepare pigment layer 3 liquid.

[0060] Table 2 Raw materials and dosage of pigment layer 3 in Examples 1-6

[0061]

[0062]

[0063] The vinyl chloride content in the chlorovinyl resin is 87%, the degree of polymerization is greater than 15, the molecular weight of the methacrylic acid copolymer is 30000<Mn<80000, and the Tg is 60℃<Tg<100℃. The plasticizer is epoxidized soybean oil.

[0064] S2: stunning;

[0065] Providing a substrate 1, and applying corona on both surfaces of the substrate 1;

[0066] S3: coating;

[0067] The back coating layer 4 liquid prepared in step S1 is coated on one surface of the substrate 1 in step S2, and then dried to form the back coating layer 4 for standby use;

[0068] The peeling layer 2 liquid obtained in step S1 is coated on the surface of the substrate away from the back coating layer 4, and then dried to form a peeling layer 2 for standby use;

[0069] The pigment layer 3 liquid obtained in step S1 is coated on the surface of the peeling layer 2 away from the substrate 1, and then dried to form the pigment layer 3.

[0070] Wherein, in step S3, the back coating layer 4 is prepared by using a ceramic anilox roller with a precision of 280 lines, and a gravure coater is used to coat the back coating layer 4 liquid, the coating speed is 80m / min, the drying temperature is 60℃-100℃, and the drying time is 10s;

[0071] In step S3, the peeling layer 2 is prepared by using a ceramic anilox roller with a precision of 280 lines, and a gravure coater is used to apply the protective layer liquid. The coating speed is 80 m / min, the drying temperature is 80° C.-100° C., and the drying time is 10 s.

[0072] In step S3, a ceramic anilox roller with a precision of 330 lines is used in the preparation of the pigment layer 3, and a gravure coater is used to coat the pigment layer 3 liquid. The coating speed is 80m / min, the drying temperature is 80°C-100°C, and the drying time is 10s.

[0073] Comparative Examples 1-3

[0074] Compared with Example 1, except for the raw materials and the amount of the pigment layer 3, the rest are the same as Example 1.

[0075] Table 3 Raw materials and dosage of pigment layer 3 in comparative examples 1-3

[0076] Comparative Example 1 2 3 Vinyl chloride resin / part 9 10 8 Methacrylic acid copolymer / part 1 4 4 Pigment / part 10 6 6 Plasticizer / part 0.1 0.1 0.1 2-Butanone / part 40 40 40 Toluene / part 39.9 39.9 39.9

[0077] Among them, the vinyl chloride content in the chloroacetic acid resin in Comparative Example 2 is 75%, and the degree of polymerization is 10; the molecular weight M of the methacrylic acid copolymer in the pigment layer 3 of Comparative Example 3 is 100000, and Tg is 110°C; the plasticizer is epoxidized soybean oil.

[0078] Test example

[0079] The transfer integrity, pattern adhesion after printing, pattern solvent resistance after printing, and accelerated aging test of the resin carbon ribbons of Examples 1-6 and Comparative Examples 1-3 were tested according to the following method;

[0080] (1) Transfer integrity test

[0081] Use a thermal transfer traffic sign printer (manufactured by Hunan Dingyi Intelligent Manufacturing Co., Ltd., model DTP-265E) to print on Dingyi PVC tape. Figure 2 The pattern shown;

[0082] The formed images were visually checked and evaluated according to the following evaluation criteria:

[0083] A: No untransferred pattern area was observed in the image;

[0084] B: <0.1% of the untransferred pattern was observed in the image;

[0085] C: <1% of the untransferred pattern was observed in the image;

[0086] NG: >1% of the non-transferred pattern was observed in the image.

[0087] (2) Adhesion test of transfer pattern

[0088] Use a thermal transfer traffic sign printer (manufactured by Hunan Dingyi Intelligent Manufacturing Co., Ltd., model DTP-265E) to print the following on the DTP-265E: Figure 2 The pattern shown.

[0089] The peeling test was carried out using a disc glass tester. After peeling, the exposed white area was less than 1%, and the evaluation was carried out according to the following evaluation criteria:

[0090] OK: After peeling, the exposed white area is less than 1%;

[0091] NG: After peeling, the exposed white area is greater than 1%.

[0092] Solvent resistance test of transfer pattern:

[0093] Use a thermal transfer traffic sign printer (manufactured by Hunan Dingyi Intelligent Manufacturing Co., Ltd., model DTP-265E) to print the following on the DTP-265E: Figure 2 The pattern shown.

[0094] Use an alcohol friction tester to perform an ethanol friction test, and record the number of frictions when the test pattern turns white under a load of 1kg;

[0095] (3) Accelerated aging test of transferred pattern

[0096] Use a thermal transfer traffic sign printer (manufactured by Hunan Dingyi Intelligent Manufacturing Co., Ltd., model DTP-265E) to print the following on the DTP-265E: Figure 2 The pattern shown.

[0097] According to the operation method of "GB / T 16422.2-2014 Plastics Laboratory Light Source Exposure Test Method Part 2: Xenon Arc Lamp", test cycle: 1800h:

[0098] The formed images were visually confirmed and evaluated according to the following evaluation criteria:

[0099] OK: The pattern has no obvious fading;

[0100] NG: The pattern is obviously faded.

[0101] The test results are shown in Tables 4 and 5.

[0102] Table 4 Test results of Examples 1-6

[0103] Example 1 2 3 4 5 6 Transfer integrity test A A A A A A Adhesion test OK OK OK OK OK OK Solvent resistance test 235 230 220 195 190 180 Accelerated Aging Test OK OK OK OK OK OK

[0104] Table 5 Test results of comparative examples 1-3

[0105] Comparative Example 1 2 3 Transfer integrity test NG OK OK Adhesion test OK NG NG Solvent resistance test 240 130 150 Accelerated aging test OK NG NG

[0106] It can be seen from Tables 4 and 5 that the resin carbon ribbon for thermal transfer outdoor marking of the present invention can realize digital printing, and has excellent light resistance and weather resistance, and no pollutants are released during the printing process, which is environmentally friendly.

[0107] In summary, the ethylene-vinyl acetate copolymer in the peeling layer 2 of the present invention provides good film-forming properties, ensures good adhesion to the substrate 1, and has good compatibility with the wax, ensuring the uniform distribution and coating of the wax in the peeling layer 2; the wax in the peeling layer 2 of the present invention provides good peeling properties and resolution of the printed pattern during printing, as well as excellent wear resistance of the pattern after printing; the methacrylic acid copolymer in the pigment layer 3 of the present invention has good light transmittance, good light resistance and weather resistance, and good peeling transfer properties, which can ensure that the carbon ribbon has good transfer ability, but the methacrylic acid copolymer content is too high, which will lead to poor adhesion and solvent resistance. Performance is degraded; the chloroacetic acid resin in the pigment layer 3 of the present invention has excellent pigment dispersibility and film-forming properties, which provides good help for the coating and film-forming of the carbon ribbon. At the same time, it has good adhesion to the substrate 1, ensuring the good foil retention of the carbon ribbon ink. The high polar groups it contains have good transfer adaptability, adhesion and alcohol resistance on the tape after transfer. However, the chloroacetic acid resin content in the pigment layer 3 is too high, which will lead to uneven peeling during transfer and incomplete transfer. In short, the resin carbon ribbon for thermal transfer outdoor marking of the present invention can realize digital printing, and has excellent light resistance and weather resistance. No pollutants are released during printing, and the environmental protection is good.

[0108] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A resin ribbon for thermal transfer outdoor marking, characterized in that: The resin carbon ribbon for thermal transfer outdoor marking comprises a back coating layer, a substrate, a peeling layer and a pigment layer which are arranged in sequence from top to bottom; The peeling layer comprises the following raw materials in parts by weight: 5-20 parts of ethylene-vinyl acetate copolymer and 80-95 parts of wax; The pigment layer comprises the following raw materials in parts by weight: 7-8.8 parts of chloroacetic acid resin, 1.2-2.5 parts of methacrylic acid copolymer, 10-11 parts of pigment, and 0.05-0.2 parts of plasticizer.

2. The resin carbon ribbon for thermal transfer outdoor marking according to claim 1, characterized in that: The ethylene-vinyl acetate copolymer in the peeling layer has a VA content of 18-30% and a melt index of 10-100; The wax in the peeling layer includes at least one of PE wax, PP wax and Fischer-Tropsch wax; the particle size of the wax is 1um-10um, and the melting point of the wax is between 80°C and 120°C.

3. The resin carbon ribbon for thermal transfer outdoor marking according to claim 1, characterized in that: The vinyl chloride content of the chlorovinyl resin in the pigment layer is greater than 85%, and the degree of polymerization is greater than 15; The molecular weight of the methacrylic acid copolymer in the pigment layer is 30000<Mn<80000, and 60℃<Tg<100℃; The pigment in the pigment layer includes at least one of yellow pigment, red pigment, blue pigment, green pigment and black pigment; The plasticizer in the pigment layer includes at least one of epoxy soybean oil, dioctyl phthalate and dibutyl phthalate.

4. The resin carbon ribbon for thermal transfer outdoor marking according to claim 1, characterized in that: The thickness of the peeling layer is 0.2 μm-0.6 μm; the thickness of the pigment layer is 0.6 μm-1.2 μm.

5. The resin carbon ribbon for thermal transfer outdoor marking according to claim 1, characterized in that: The thickness of the pigment layer is 0.6 μm-1.2 μm.

6. The resin carbon ribbon for thermal transfer outdoor marking according to claim 5, characterized in that: The main resin in the back coating layer includes at least one of cellulose acetate propionate, polyvinyl acetal resin, and polyvinyl butyral resin; The high-adhesive resin in the back coating layer includes at least one of a polyester resin and a polyurethane resin; The lubricant in the back coating layer includes at least one of phosphate ester, zinc stearate, glyceryl dioleate, and glyceryl monooleate; The filler in the back coating layer includes at least one of talc, kaolin, calcium carbonate, aluminum hydroxide, silicon dioxide, graphite, and boron nitride; The cross-linking agent includes an isocyanate compound.

7. The resin carbon ribbon for thermal transfer outdoor marking according to claim 1, characterized in that: The back coating layer has a thickness of 0.1 μm-0.5 μm.

8. The resin carbon ribbon for thermal transfer outdoor marking according to claim 1, characterized in that: The substrate includes any one of polyethylene terephthalate film, 1,4-polycyclohexylene dimethylene terephthalate film, polyethylene naphthalate film, polyphenylene sulfide film, polystyrene film, polypropylene film, polyethylene film, polyvinyl chloride film, nylon film, and polyimide film.

9. A method for preparing a resin carbon ribbon for thermal transfer outdoor marking according to any one of claims 1 to 8, characterized in that: The steps include: S1: Prepare solution: Prepare back coating liquid, stripping layer liquid and pigment layer liquid respectively and set aside; S2: stunning; Providing a substrate, and applying corona to both surfaces of the substrate; S3: coating; Applying the back coating liquid prepared in step S1 on one surface of the substrate in step S2, and then drying to form a back coating for standby use; The peeling layer liquid obtained in step S1 is coated on the surface of the substrate away from the back coating layer, and then dried to form a peeling layer for standby use; The pigment layer liquid obtained in step S1 is coated on the surface of the peeling layer away from the substrate, and then dried to form a pigment layer.

10. The method for preparing a resin carbon ribbon for thermal transfer outdoor marking according to claim 9, characterized in that: In step S3, the back coating layer is prepared by using a ceramic anilox roller with a precision of 280 lines, and a gravure coater is used to coat the back coating liquid. The coating speed is 60-100 m / min, the drying temperature is 60° C.-100° C., and the drying time is 5s-30s. In step S3, the peeling layer is prepared by using a ceramic anilox roller with a precision of 280 lines, and a gravure coater is used to coat the peeling layer liquid. The coating speed is 60-100 m / min, the drying temperature is 80° C.-100° C., and the drying time is 5s-30s. In step S3, a ceramic anilox roller with a precision of 300-340 lines is used in the preparation of the pigment layer, and a gravure coater is used to coat the pigment layer liquid. The coating speed is 60-100 m / min, the drying temperature is 80° C.-100° C., and the drying time is 5s-30s.

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