Efficient laser heat transfer printing thermal transfer ribbon with layered structure and preparation method and application of efficient laser heat transfer printing thermal transfer ribbon

Abstract

The invention belongs to the technical field of laser heat transfer printing, and particularly relates to an efficient laser heat transfer printing thermal transfer ribbon with a layered structure and a preparation method and application of the efficient laser heat transfer printing thermal transfer ribbon. The efficient laser heat transfer printing thermal transfer ribbon with the layered structure comprises an ink layer, a transparent demolding layer, a black release layer and a transparent base material which are arranged in sequence. According to the thermal transfer ribbon, the black release layer, the transparent release layer and the ink layer are combined to form an innovative layered structure, and the performance of the thermal transfer ribbon is remarkably improved through the synergistic effect of all the layers.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser thermal transfer, and particularly relates to a high-efficiency laser thermal transfer ribbon with a hierarchical structure, a preparation method thereof, and an application thereof. Background Art

[0002] In the existing thermal transfer technology, there are many problems with the ribbon, such as the transfer efficiency needs to be improved, and there is a large energy loss during the transfer process; the pattern quality is difficult to reach an ideal state, and the line clarity, color saturation, and resolution are limited; the adaptability to the substrate is insufficient, and the transfer effects on different material surfaces are uneven.

[0003] Laser thermal transfer is a printing technology that uses laser energy to cause a specific layer on the ribbon to absorb heat, promoting a state change in the ink layer or dye layer, thereby achieving the transfer of the pattern onto the substrate. Laser thermal transfer technology has been widely used in fields such as packaging printing, label production, and personalized customization due to its precision and high efficiency. However, with the continuous improvement of market requirements for printing quality and efficiency, traditional ribbons can no longer meet the needs. Specifically, the existing ribbons have the following deficiencies:

[0004] Low transfer efficiency leads to an extended production cycle and increased production costs, especially evident in large-scale printing tasks;

[0005] Poor pattern quality limits its application in high-end printing fields (such as art printing and high-resolution image printing), and cannot meet consumers' demands for exquisite printed products;

[0006] Poor substrate adaptability makes it necessary to frequently replace or adjust the ribbon when applied in different industries, reducing production efficiency and increasing operating costs.

[0007] In commercial printing (such as label and ticket printing), the existing ribbons may not meet the high-speed printing requirements, and the printed patterns are prone to wear and fade; in personalized customization printing (such as customized gift and decorative painting printing), it is difficult to achieve printing effects with high color accuracy and rich color levels; in industrial identification printing, the adhesion and corrosion resistance to different substrate materials are insufficient.

[0008] Currently, common methods to improve the performance of the ribbon include:

[0009] 1. Improving the ink formula, by adjusting the types and proportions of pigments, resins, and additives, to improve the color development and transferability of the ink, but this may cause problems with ink stability and cost.

[0010] 2. Optimizing the ribbon substrate, selecting a higher-quality or special-performance substrate material, such as a high-strength and high-flexibility substrate, but there are challenges in the compatibility between the substrate and the coating and the overall performance balance.

[0011] 3. Adjust the laser parameters, optimize the laser wavelength, power, pulse width, etc. according to the characteristics of the carbon ribbon. However, this requires precise equipment control and complex parameter debugging, and has limited adaptability to different carbon ribbons.

[0012] However, these common improvement methods have many problems as follows, resulting in the inability to obtain a high-efficiency laser thermal transfer carbon ribbon:

[0013] 1. When optimizing the ink formula, new components may chemically react with other layers, affecting the overall performance of the carbon ribbon; the increased cost may make the product lose price competitiveness; and it cannot fundamentally solve the problems of transfer efficiency and substrate adaptability.

[0014] 2. Although improving the substrate may improve some properties, it is difficult to meet the requirements of multiple aspects simultaneously. For example, increasing the strength may reduce the flexibility, affecting the performance of the carbon ribbon during bending or winding; and the change of the substrate may require re-optimizing the entire coating process, increasing the technical difficulty and cost.

[0015] 3. Adjusting the laser parameters requires high equipment requirements, and in actual production, the material properties of different batches of carbon ribbon materials may have certain fluctuations, resulting in the pre-set laser parameters not always maintaining the best transfer effect, affecting production efficiency and product quality stability. Summary of the Invention

[0016] To solve the deficiencies of the prior art, the present invention provides a high-efficiency laser thermal transfer carbon ribbon with a layered structure, its preparation method and application. The present invention can significantly improve the transfer efficiency, greatly improve the pattern quality, enhance the adaptability to various substrates, while maintaining a reasonable cost and meeting diverse printing needs.

[0017] The technical solutions provided by the present invention are as follows:

[0018] A high-efficiency laser thermal transfer carbon ribbon with a layered structure, comprising an ink layer, a transparent release layer, a black release layer and a transparent substrate arranged in sequence.

[0019] In the above technical solution:

[0020] The black release layer can efficiently absorb laser energy and convert it into heat energy, providing sufficient heat for the transfer of the ink layer, and ensuring that the ink layer can smoothly detach from the black release layer after being heated, realizing the transfer;

[0021] The transparent release layer has good transparency, flexibility and adhesiveness, can effectively isolate the black release layer and the ink layer, prevent the components in the ink layer from migrating to the black release layer prematurely, and has good hardness, abrasion resistance and thermal stability, providing good support for the ink layer and helping the ink layer to remain intact during the transfer process; at the same time, the transparent release layer will be fully transferred to the substrate along with the ink layer, which can not only protect the ink, but also will not produce miscellaneous colors due to its transparent color;

[0022] The combination of the black release layer, the transparent release layer and the ink layer forms an innovative layered structure, and the synergistic effect of each layer significantly improves the performance of the carbon ribbon.

[0023] Substrate

[0024] Material selection: Select a transparent polyethylene terephthalate film, polypropylene film, polyethylene naphthalate film, polyethylene film, polyvinyl alcohol film or polymethyl methacrylate film with a thickness of 4 - 10 microns. Preferably, a polyethylene terephthalate (PET) film is used as the support layer because it has good mechanical strength, can withstand various stresses during the preparation, storage, transportation and use of the carbon ribbon, and is not easily broken or deformed; it has high chemical stability, can resist the erosion of inks, solvents and other chemicals, and ensures the stable performance of the carbon ribbon in different chemical environments; it has good dimensional stability, is not easily stretched or shrunk when the temperature and humidity change, and ensures the transfer accuracy; it has a high surface flatness, which is conducive to the uniform coating of the bottom coating and the ink layer.

[0025] Surface treatment method: The surface of the substrate is treated by corona treatment to make the surface dyne value reach 42 - 50, enhancing its adhesion to the photothermal conversion layer. The corona treatment time is 5 - 10 seconds, the power is 1 - 3 kW, and the next coating operation is carried out immediately after the treatment to prevent surface contamination from affecting the adhesion.

[0026] Black release layer

[0027] Material composition and function: It is composed of carbon black (mass fraction 15% - 25%), acrylic resin (mass fraction 65% - 75%) and silicone release agent (mass fraction 5% - 10%).

[0028] Based on the above technical solutions:

[0029] Carbon black has excellent light absorption performance, can efficiently absorb laser energy and convert it into heat energy, providing sufficient heat for the transfer of the ink layer;

[0030] The acrylic resin serves as a binder to ensure the firm adhesion of the black release layer on the PET substrate, and at the same time has good flexibility and heat resistance;

[0031] Silicone release agents reduce the adhesion between the black release layer and the ink layer, enabling the ink layer to smoothly detach from the black release layer after heating and achieving transfer printing.

[0032] The optimized combination of carbon black, acrylic resin, and silicone release agents in the black release layer achieves efficient photothermal conversion and good release effect.

[0033] Preparation and coating process:

[0034] Add carbon black to an organic solvent (such as toluene) containing an appropriate amount of dispersant (such as sodium polyacrylate, with a mass fraction of 3%-5% of the carbon black mass), and disperse it for 40-60 minutes using an ultrasonic dispersion device at an ultrasonic power of 300-500W to form a uniformly dispersed liquid. Then dissolve the acrylic resin in the above dispersed liquid, stir for 60-90 minutes, and then add the silicone release agent and continue to stir for 30-45 minutes to obtain the black release layer coating. Coating is carried out using a gravure coater at a coating speed of 100-200m / min, a drying temperature of 60-80°C, and the coating thickness is controlled at 0.3-0.8μm.

[0035] Transparent release layer

[0036] Material composition and function: Select polyvinyl butyral (PVB, mass fraction 80%-90%) and nano-silica (mass fraction 10%-20%) as the main components.

[0037] Based on the above technical solutions:

[0038] PVB has good transparency, flexibility, and adhesiveness, and can effectively isolate the black release layer and the ink layer, preventing the components in the ink layer from migrating to the black release layer prematurely.

[0039] Nano-silica can improve the hardness, wear resistance, and thermal stability of the transparent release layer, while enhancing its supporting effect on the ink layer, helping the ink layer to remain intact during the transfer printing process.

[0040] The combination of PVB and nano-silica not only ensures the isolation and auxiliary release functions but also enhances the overall performance.

[0041] Preparation and coating process: Dissolve PVB in a mixed solvent of ethanol and butanone (volume ratio 1:1 - 2:1) to prepare a solution with a mass fraction of 10%-15%, then add nano-silica and stir using a high-speed stirrer at 1500-2500rpm for 30-60 minutes to prepare the transparent release layer coating. Coating is carried out using a microgravure coater at a coating speed of 100-200m / min, a drying temperature of 60-100°C, and the thickness is controlled at 0.1-0.5μm.

[0042] Ink layer

[0043] Material selection and functions: The ink is composed of thermoplastic polyester resin (40%-60% by mass fraction), pigments (such as carbon black, organic pigments, 15%-30% by mass fraction), wax additives (such as microcrystalline wax, 10%-20% by mass fraction), and organic solvents (such as methyl ethyl ketone, toluene, 10%-20% by mass fraction).

[0044] Based on the above technical solution:

[0045] The thermoplastic polyester resin provides good adhesion and flexibility, enabling the ink to firmly adhere to the printing substrate;

[0046] The pigments ensure accurate color presentation, meeting different printing color requirements;

[0047] The wax additives adjust the melting point and fluidity of the ink, enabling it to be smoothly transferred at an appropriate temperature during the transfer process; the organic solvents facilitate the coating and drying of the ink, ensuring the uniformity of the ink layer.

[0048] Furthermore, additives can be added:

[0049] Adding a dispersant (such as a polymer dispersant, 3%-6% by mass fraction of the pigment mass) ensures the uniform dispersion of the pigment in the ink, preventing pigment agglomeration from affecting the printing quality;

[0050] A leveling agent (silicone leveling agent, 0.5%-1.5% by mass fraction of the total ink mass) improves the surface flatness of the ink layer, reducing defects on the surface of the printed pattern;

[0051] An antioxidant (hindered phenol antioxidant, 0.5%-1% by mass fraction of the total ink mass) improves the antioxidant performance of the ink during storage and use, extending the service life of the ink.

[0052] Coating parameters and thickness control: The ink layer is coated by gravure coating, the coating speed is 100 - 200 m / min, the drying temperature is 70 - 100 °C, and the thickness is controlled at 0.5 - 1.5 μm according to the printing requirements (for example, the thickness for ordinary text and line printing can be 0.5 - 1.0 μm, and the thickness for color image printing can be 1.0 - 1.5 μm).

[0053] The present invention also provides a method for preparing a high-efficiency laser thermal transfer carbon ribbon with a layered structure, including the following steps: corona treating the surface of the substrate, and then sequentially preparing a black release layer, a transparent release layer, and an ink layer.

[0054] The present invention also provides an application of the high-efficiency laser thermal transfer carbon ribbon with a layered structure, using ultraviolet light, visible light, or infrared light as the laser source for full transfer.

[0055] The beneficial effects of the present invention are as follows:

[0056] 1) In terms of the transfer efficiency, by optimizing the light absorption performance and heat conduction performance of the black release layer, as well as the good cooperation between layers, the carbon ribbon transfer efficiency of the present invention is increased by 30%-60% compared with the prior art, which can significantly shorten the printing time and improve the production efficiency;

[0057] 2) In terms of the pattern quality, the uniform photothermal conversion of the black release layer, the stable support of the transparent release layer for the ink layer, and the precise control of the laser energy by the protective layer make the edges of the lines sharper and the pattern details clearly distinguishable, with the clarity increased by 25%-50% compared with the prior art; the ink formula, the synergistic effect between layers, and the protection of the ink by the protective layer make the colors more vivid and bright, with the color saturation increased by 20%-30% compared with the prior art. Brief Description of the Drawings

[0058] Figure 1 is a schematic structural diagram of the high-efficiency laser thermal transfer carbon ribbon with a layered structure provided by the present invention.

[0059] Figure 2 is a comparison diagram of the printing effects of Example 1 and Comparative Example 1.

[0060] Attached Figure 1 In the figure, the list of the structures represented by each reference numeral is as follows:

[0061] 1. Substrate; 2. Black release layer; 3. Transparent release layer; 4. Ink layer. Detailed Embodiments

[0062] The principles and features of the present invention will be described below. The examples cited are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0063] Unless otherwise specified, the test methods used in the examples are all conventional methods; the materials, reagents, etc. used, unless otherwise specified, are reagents and materials that can be obtained from commercial channels.

[0064] The carbon black can be selected from the prior art, such as Cabot XP 190; the sodium polyacrylate dispersant can be selected from the prior art, such as Rohm&Haas NP-10;

[0065] The acrylic resin can be selected from the prior art, such as BASF 43-30;

[0066] The silicone release agent can be selected from the prior art, such as Shin-Etsu KF-960;

[0067] Polyvinyl butyral can be selected from the prior art, such as DuPont B-79;

[0068] Nano-silica can be selected from the prior art, such as Bayer ST 200;

[0069] Thermoplastic polyester resin can be selected from the prior art, such as BASF 250;

[0070] Microcrystalline wax can be selected from the prior art, such as Dow Corning 2-8566;

[0071] Polymer dispersant can be selected from the prior art, such as Rohm&Haas NP-10;

[0072] Silicone leveling agent can be selected from the prior art, such as Shin-Etsu KF-353S;

[0073] Hindered phenol antioxidant can be selected from the prior art, such as BASF 1010;

[0074] Fluorocarbon resin modifier can be selected from the prior art, such as Hymen F 102.

[0075] In a specific embodiment, as Figure 1 shown, the high-efficiency laser thermal transfer carbon ribbon with a layered structure includes an ink layer 4, a transparent release layer 3, a black release layer 2, and a transparent substrate 1 arranged in sequence.

[0076] Example 1

[0077] PET substrate: A 6μm PET film is selected and subjected to plasma treatment with a treatment power of 200W and a treatment time of 45 seconds.

[0078] Black release layer

[0079] 20 parts of carbon black, 0.8 parts of sodium polyacrylate dispersant, 50 parts of toluene, after ultrasonic dispersion for 50 minutes, 70 parts of acrylic resin are added, stirred for 75 minutes, and then 8 parts of silicone release agent are added and stirred for 40 minutes to obtain the coating. Coated with a gravure coater at a speed of 150m / min and dried at 90°C, with a thickness of 0.5μm.

[0080] Transparent release layer

[0081] 85 parts of polyvinyl butyral (PVB), 15 parts of nano-silica, are dissolved in a mixed solvent of ethanol and methyl ethyl ketone (1.5:1), and stirred at high speed for 50 minutes to prepare a coating. Coated with a gravure coater at a speed of 150 m / min and dried at 80 °C, with a thickness of 0.3 μm.

[0082] Ink layer

[0083] 50 parts of thermoplastic polyester resin, 20 parts of carbon black pigment, 15 parts of microcrystalline wax, 10 parts of methyl ethyl ketone, 5 parts of toluene, 1.0 part of polymer dispersant, 1.0 part of silicone leveling agent, 0.8 part of hindered phenol antioxidant, after mixing, coated by gravure at a speed of 150 m / min and dried at 90 °C, with a thickness of 1.0 μm.

[0084] Example 2

[0085] PET substrate: the same as in Example 1.

[0086] Black release layer: the same as in Example 1.

[0087] Transparent release layer: the same as in Example 1.

[0088] Ink layer

[0089] 45 parts of thermoplastic polyester resin, 25 parts of organic pigment (such as phthalocyanine blue), 18 parts of microcrystalline wax, 12 parts of methyl ethyl ketone, 8 parts of toluene, 1.2 parts of polymer dispersant, 1.2 parts of silicone leveling agent, 0.9 part of hindered phenol antioxidant, after mixing, coated by gravure at a speed of 150 m / min and dried at 95 °C, with a thickness of 1.2 μm (for color image printing).

[0090] Example 3

[0091] PET substrate: the same as in Example 1.

[0092] Black release layer: Add 10% fumed nano-silica (instead of the silicone-based release agent in the original scheme).

[0093] Transparent release layer: Add 5% fluorocarbon resin modifier.

[0094] Ink layer: Use a UV-curable ink system. The preparation method is: 45 parts of thermoplastic polyester resin, 25 parts of organic pigment, 18 parts of microcrystalline wax, 20 parts of a mixed solvent of toluene and methyl ethyl ketone (1:1), 1.2 parts of polymer dispersant, 1.2 parts of silicone leveling agent, 0.9 part of hindered phenol antioxidant, after mixing, coated by gravure at a speed of 150 m / min and dried at 95 °C, cured using a 365 nm ultraviolet wavelength light source, with a thickness of 1.2 μm.

[0095] Tests show that the transfer efficiency is increased to 16.5 ± 0.7 cm 2 / s, the weather resistance test passes the ISO 105 - B02 standard.

[0096] Comparative Example 1

[0097] Refer to Example 1, the difference is that carbon black is not added to the release layer.

[0098] Comparative Example 2

[0099] Refer to Example 1, the difference is that the transparent release layer is not provided.

[0100] Comparative Example 3

[0101] Refer to Example 1, the difference is that the material of the black release layer is different. Specifically, the acrylic resin is changed to a vinyl chloride - acetate resin, and the grade is Wacker H15 / 42.

[0102] Performance Test Plan

[0103] 1. Transfer Efficiency Test

[0104] Test Equipment and Method: Using a high - precision timer and a laser power meter, at a fixed laser wavelength (980 nm) and power (8 W), measure the time required for the carbon ribbon to transfer a specific pattern (such as a 10 cm × 10 cm all - black pattern) on standard paper. The transfer efficiency is calculated by the area transferred per unit time (cm 2 / s).

[0105] Sample Quantity and Statistical Analysis: Each example and comparative example is tested 5 times, and the average value is taken as the final result. The standard deviation is calculated to evaluate the dispersion degree of the data.

[0106] 2. Pattern Quality Test

[0107] Clarity Evaluation

[0108] Test Equipment and Method: Use a high - resolution optical microscope (magnification 500 - 1000 times) to observe the edge of the transferred pattern line and measure the line width deviation. At the same time, use professional image analysis software (such as ImageJ) to calculate the clarity parameters of the pattern, such as the edge gradient value and the modulation transfer function (MTF) value.

[0109] Quantification Standard: The line width deviation within ±5%, the edge gradient value greater than 50, and the MTF value greater than 0.4 at a specific frequency (such as 10 lp / mm) are regarded as good clarity.

[0110] Color Saturation Evaluation

[0111] Testing Equipment and Methods: Use a spectrophotometer (such as X-Rite i1Pro 2) to measure the color spectral reflectance of the transferred pattern, and calculate the color saturation parameters (such as the range of a*, b coordinate values and C value) according to the color space (such as sRGB, Adobe RGB).

[0112] Quantification Standard: When the range of a*, b coordinate values is within specific thresholds (such as a between -50 and 50, b between -50 and 50) and the C value is greater than 50, it is considered that the color saturation is high.

[0113] Evaluation of the Line Edge Regularity

[0114] Testing Equipment and Methods: Observe the line edge morphology of the transferred pattern through a scanning electron microscope (SEM), and measure the roughness and irregularity of the edge. At the same time, use image analysis software to calculate the serration parameter of the edge.

[0115] Quantification Standard: When the edge roughness is less than 0.5μm and the serration parameter is less than 0.1, it is considered that the line edge regularity is good.

[0116] Sample Quantity and Statistical Analysis: Each example and comparative example are tested 5 times, and the average value is taken as the final result, and the standard deviation is calculated to evaluate the reliability of the data.

[0117] 3. Substrate Adaptability Test

[0118] Testing of Different Substrate Materials: Select substrates of various materials such as paper (such as coated paper, thermal paper, and coated paper is uniformly used in the test), plastic film (such as PET film, PP film, and PET film is uniformly used in the test), leather, etc., and conduct transfer tests under the same laser thermal transfer parameters.

[0119] Adhesion Test Method

[0120] Tape Peel Test: After transfer, stick a standard tape (such as 3M tape) on the surface of the pattern, roll it 3 times with a 2kg roller, and then quickly peel the tape in a 90° direction, observe the pattern peeling situation, and calculate the percentage of the peeling area. When the peeling area is less than 5%, it is considered that the adhesion is good.

[0121] Abrasion Resistance Test: Fix the transferred substrate on a friction testing machine, use a rubber friction head, apply a pressure of 5N, and reciprocate at a speed of 100mm / s for 100 times, observe the pattern wear situation, and rate according to the wear degree (such as level 1 - 5, level 5 means no wear, level 1 means severe wear).

[0122] The test results are as follows:

[0123]

[0124] Such asFigure 2 As shown, it is a comparison diagram of the printing effects of Example 1 and Comparative Example 1. The left part corresponds to Example 1, and the right part corresponds to Comparative Example 1. Both are partial barcodes. It can be seen that Example 1 is higher than Comparative Example 1 in terms of both clarity and edge neatness, and the ink is fully transferred.

[0125] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-efficiency laser thermal transfer ribbon with a layered structure, characterized in that: The invention comprises an ink layer, a transparent demoulding layer, a black release layer and a transparent substrate which are arranged in sequence.

2. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 1, characterized in that: The black release layer comprises the following components in percentage by mass: 15%-25% carbon black, 65%-75% acrylic resin, and 5%-10% silicone release agent or fumed nano-silicon dioxide; The thickness is 0.3-0.8μm.

3. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 1, characterized in that: The transparent release layer comprises the following components in mass percentage: 80%-90% polyvinyl butyral and 10%-20% nano silicon dioxide; Alternatively, the transparent release layer comprises the following components in mass percentage: 80%-90% polyvinyl butyral, 10%-20% nano silicon dioxide, and 4%-6% fluorocarbon resin modifier; The thickness is 0.1-0.5μm.

4. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 1, characterized in that: The ink layer is prepared from an ink coating liquid, which includes the following components in mass percentage: 40%-60% thermoplastic polyester resin, 15%-30% pigment, 10%-20% wax additive, and 10%-20% organic solvent; the thickness is 0.5-1.5 μm when used for text or line printing; or, the thickness is 1.0-1.5 μm when used for color image printing.

5. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 4, characterized in that: The pigment is carbon black or an organic pigment; The wax additive is microcrystalline wax; The organic solvent includes methyl ethyl ketone and toluene.

6. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 4, characterized in that: The ink coating liquid may further include any one or more of the following additives: Dispersant, the amount of which is 3%-6% of the pigment mass; Leveling agent, the amount of which is 0.5%-1.5% of the mass of the ink coating liquid; The antioxidant is used in an amount of 0.5% to 1% of the mass of the ink coating liquid.

7. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 6, characterized in that: The dispersant is a high molecular polymer dispersant; The leveling agent is an organic silicon leveling agent; The antioxidant is a hindered phenol antioxidant.

8. The high-efficiency laser thermal transfer carbon ribbon with a layered structure according to claim 1, characterized in that: The substrate is selected from a transparent polyethylene terephthalate film, a polypropylene film, a polyethylene naphthalate film, a polyethylene film, a polyvinyl alcohol film or a polymethyl methacrylate film; The thickness of the substrate is 4-10 μm.

9. A method for preparing a high-efficiency laser thermal transfer carbon ribbon with a layered structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: The surface of the substrate is subjected to corona treatment, and then a black release layer, a transparent release layer and an ink layer are prepared in sequence.

10. An application of a high-efficiency laser thermal transfer carbon ribbon with a layered structure according to any one of claims 1 to 8, characterized in that: Ultraviolet light, visible light or infrared light is used as the laser source for full transfer.

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