A high-performance thermal transfer resin ribbon, its preparation method and application

By designing a three-layer structure for high-performance thermal transfer resin ribbons, the problems of insufficient weather resistance and transferability of fluororesins in outdoor environments are solved, achieving high adhesion and ease of printing, making it suitable for traffic sign materials.

CN116512790BActive Publication Date: 2025-11-14HUNAN DINGYIYUAN TECH DEV CO LTD +1
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Patent Information

Application Number
CN202310371395.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-10
Publication Date
2025-11-14
Estimated Expiration
2043-04-10

AI Technical Summary

Technical Problem

Existing traffic sign materials lack sufficient weather resistance, stain resistance, and heat resistance in outdoor environments, and the cross-linked curing of fluoropolymers makes them difficult to transfer onto reflective film, affecting printing results.

Method used

A high-performance thermal transfer resin ribbon is designed, using solvent-based fluororesin as the main body, combined with a three-layer structure of adhesive layer, ink layer and release layer, to ensure the high performance and good adhesion of fluororesin, and to improve release and abrasion resistance through the release layer.

Benefits of technology

It improves the material's weather resistance, stain resistance, and heat resistance, solves the problem of difficult transfer printing after fluoropolymer cross-linking and curing, while maintaining printing convenience and high transparency, making it suitable for road reflective films.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to a high-performance thermal transfer resin ribbon, its preparation method, and its application, belonging to the field of thermal transfer printing technology. It includes, from top to bottom, an adhesive layer, an ink layer, a release layer, a substrate, and a back coating layer, all sequentially bonded together. The adhesive layer is formed by applying an adhesive layer coating. The ink layer is formed by applying an ink layer coating, which comprises 50-70 parts by weight of solvent-based fluoropolymer resin, 50-70 parts by weight of pigment, 0.025-2.1 parts by weight of light stabilizer, and 3-3.01 parts by weight of curing agent. The release layer is formed by applying a release layer coating. Compared to traditional acrylic, polyurethane, and silicone resins, solvent-based fluoropolymer resins have stronger fluorocarbon bonds, resulting in better weather resistance, stain resistance, heat resistance, and low-temperature resistance, making them more suitable for various outdoor environments. They offer superior performance compared to traditional resins while providing convenient printing.
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Description

Technical Field

[0001] This invention relates to the field of thermal transfer printing technology, specifically to a high-performance thermal transfer resin ribbon, its preparation method, and its application. Background Technology

[0002] Because traffic signs are exposed to the outdoors for extended periods and face various outdoor environments, traffic sign materials are required to have high performance, such as weather resistance, stain resistance, heat resistance, and low-temperature resistance. Currently, the industry often uses acrylic, polyurethane, and silicone systems as the main printing materials, but their performance is still limited.

[0003] From the perspective of printing methods, the commonly used printing methods on the market include screen printing, UV inkjet printing, and thermal transfer printing. Among these printing methods, thermal transfer printing has developed rapidly in recent years due to its high environmental friendliness and relatively simple process.

[0004] In view of the requirement for high performance in traffic signs, this invention provides a high-performance thermal transfer resin ribbon, its preparation method, and its application. It should be noted that the applicant has already applied for several patents, including CN202111612885.7 - A gasoline-resistant resin ribbon for traffic printing and its preparation method, and CN202111611831.9 - A rapidly printable thermal transfer resin ribbon and its preparation method. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a high-performance thermal transfer resin ribbon, its preparation method, and its application. The aim is to provide a high-performance resin ribbon based on thermal transfer printing for the transportation industry. The ink layer is mainly composed of solvent-based fluororesin, making it more adaptable to various outdoor environments. Addressing the difficulty in transferring fluororesin after cross-linking and curing onto reflective film, a three-layer resin ribbon structure consisting of an adhesive layer, an ink layer, and a release layer is designed. This effectively solves the problem of difficult transfer after fluororesin cross-linking and curing, resulting in good adhesion to the substrate without affecting the high performance of the fluororesin itself. It offers convenient printing while possessing superior performance compared to traditional resins. Furthermore, this resin ribbon has high overall transparency, minimizing the impact on the retroreflective coefficient after printing on reflective film, making it well-suited for use on road reflective films.

[0006] In order to solve the above-mentioned technical problems, the first objective of this invention is to provide a high-performance thermal transfer resin ribbon, comprising an adhesive layer, an ink layer, a release layer, a substrate, and a back coating layer that are sequentially bonded from top to bottom.

[0007] The adhesive layer is formed by applying an adhesive coating, which comprises the following components in parts by weight: 25-40 parts resin, 0.0125-0.8 parts organosilicon, and 0-1.2 parts light stabilizer;

[0008] The ink layer is formed by coating an ink layer coating, which comprises the following components in parts by weight: 50-70 parts solvent-based fluororesin, 50-70 parts pigment, 0.025-2.1 parts light stabilizer, and 3-3.01 parts curing agent;

[0009] The release layer is formed by applying a release layer coating, which comprises the following components in parts by weight: 50-70 parts of (meth)acrylic resin, 0.05-1.4 parts of fluorine-containing additives, 0.05-1.4 parts of light stabilizer, and 0.25-2 parts of wax powder.

[0010] The beneficial effects of this invention are as follows: The ink layer is primarily composed of solvent-based fluororesin. Compared to traditional resins such as acrylic, polyurethane, and silicone, fluororesin has stronger fluorocarbon bonds, resulting in better weather resistance, stain resistance, heat resistance, and low-temperature resistance, making it more adaptable to various outdoor environments. Furthermore, addressing the difficulty in transferring cross-linked and cured fluororesin onto reflective film, the three-layer resin ribbon structure (adhesive layer, ink layer, and release layer) effectively solves this problem. It provides good adhesion to the substrate without compromising the high performance of the fluororesin itself, offering superior performance compared to traditional resins while ensuring convenient printing. The release layer is positioned between the substrate and the ink before printing and on the side of the ink layer furthest from the traffic sign substrate after printing. Its main functions are to help the ink layer detach from the substrate and to protect the ink layer on the outermost side after printing. To enhance the release effect of the release layer, a certain amount of wax powder can be added to improve wear resistance. The ratio of the OH equivalent of the solvent-based fluororesin to the NCO equivalent of the curing agent is between 1:1 and 1:1.1.

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

[0012] Further, the adhesive layer coating comprises the following components in parts by weight: 30-35 parts resin, 0.25-0.4 parts silicone, and 0.1-1 parts light stabilizer; the ink layer coating comprises the following components in parts by weight: 55-65 parts solvent-based fluoropolymer, 55-65 parts pigment, 0.025-2.1 parts light stabilizer, and 3-3.01 parts curing agent; the release layer coating comprises the following components in parts by weight: 55-65 parts (meth)acrylic resin, 0.1-1 parts fluorinated additive, 0.1-1 parts light stabilizer, and 0.5-1 parts wax powder.

[0013] Further, the resin includes one or more of polyester resin, methacrylic resin, polyaldehyde resin, and polyurethane; the organosilicon includes one or more of methylsiloxane, polymethylphenylsiloxane, and polyphenylsiloxane; the light stabilizer includes one or more of salicylates, benzophenones, benzotriazoles, and triazines as ultraviolet absorbers; the solvent-based fluoropolymer is a fluoroalkyl ethyl ether resin; the pigment is an inorganic pigment and / or an organic pigment; the curing agent includes one or more of melamine, polyisocyanates, and their derivatives; the acrylic resin includes one or more of methyl methacrylate, acrylonitrile, ethyl acrylate, butyl acrylate, isooctyl acrylate, and isobutyl methacrylate; the fluorinated additive includes one or more of fluorosilanes, fluorinated surfactants, and fluorinated acrylic resins; and the wax powder includes one or more of carnauba wax, PE wax, and EVA wax.

[0014] Furthermore, the substrate is a transparent flexible plastic film; the back coating includes one or more of polyurethane-modified silicone resin, acrylic-modified silicone resin, polyvinyl acetal resin, and polyvinyl butyral resin. Preferably, the ratio of polyurethane-modified silicone resin to acrylic-modified silicone resin is 1:1.

[0015] Furthermore, the polyisocyanates include hexamethylene diisocyanate (HDI), isoflurone diisocyanate (IPDI), and dicyclohexylmethane diisocyanate (HDI). 12 MDI), 2,4-toluene diisocyanate (TDI) and 2,6-toluene diisocyanate (TDI), diphenylmethane-4,4'-diisocyanate (MDI);

[0016] The inorganic pigments include one or more of the following: oxides, chromates, sulfates, silicates, borates, molybdates, phosphates, vanadates, ferrocyanates, hydroxides, sulfides, and metals.

[0017] The organic pigments include one or more of azo pigments, phthalocyanine pigments, polycyclic pigments, and arylmethane pigments; polycyclic pigments include anthraquinones, indigo compounds, quinacridones, and dioxazines; metals include aluminum powder, zinc powder, copper powder, etc.

[0018] The transparent flexible plastic film includes polypropylene (PP), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), or polymethyl methacrylate (PMMA), with PET and PEN being preferred.

[0019] Furthermore, the release coating, ink coating, adhesive coating, and back coating also include 0.1-1 parts of leveling agent and 0.1-1 parts of defoamer.

[0020] Furthermore, the thickness of the adhesive layer is 0.3-2 μm; the thickness of the ink layer is 0.5-1.5 μm; the thickness of the release layer is 0.5-2 μm; the thickness of the substrate is 4-20 μm; and the thickness of the back coating is 0.2-1.0 μm.

[0021] Furthermore, the thickness of the adhesive layer is 0.3-1.0 μm; the thickness of the ink layer is 0.8-1.2 μm; the thickness of the release layer is 0.5-1.5 μm; the thickness of the substrate is 4-7 μm; and the thickness of the back coating is 0.4-0.8 μm.

[0022] The beneficial effects of adopting the above-mentioned further solutions are: the thickness of the adhesive layer, ink layer, release layer, substrate and back coating of the present invention results in high transparency and has little impact on the retroreflection coefficient after printing on the reflective film, which can be well applied to road reflective films.

[0023] The second objective is to provide a method for preparing high-performance thermal transfer resin ribbons, comprising the following steps:

[0024] S1: Liquid preparation:

[0025] Adhesive coating: Dissolve the resin in methyl ethyl ketone and toluene solvent, then add light stabilizer and organosilicon, stir and mix to prepare adhesive coating for later use;

[0026] Ink layer coating: Solvent-based fluororesin is dissolved in methyl ethyl ketone and toluene solvent, then pigments, dispersants, and light stabilizers are added, stirred and mixed, and finally a curing agent is added to make ink layer coating for later use;

[0027] Release coating: Dissolve (meth)acrylic resin in methyl ethyl ketone and toluene solvent, then add fluorine-containing additives, light stabilizers and wax powder, stir and mix to prepare release coating for later use;

[0028] Back coating: One or more of polyurethane modified silicone resin, acrylic modified silicone resin, polyvinyl alcohol acetal resin, and polyvinyl alcohol butyral resin are dissolved in methyl ethyl ketone and toluene solvent, stirred and mixed to prepare a back coating for later use.

[0029] S2: Stun;

[0030] A substrate is provided, and corona discharge is applied to two opposite surfaces of the substrate;

[0031] S3: Coating;

[0032] The back coating obtained in step S1 is applied to one surface of the substrate in step S2, and then dried to form a back coating for later use.

[0033] The release layer coating obtained in step S1 is applied to the side of the substrate away from the back coating layer, and then dried to form a release layer for later use.

[0034] The ink layer coating obtained in step S1 is applied to the side of the release layer away from the substrate, and then dried to form an ink layer;

[0035] The adhesive coating obtained in step S1 is applied to the side of the ink layer away from the release layer, and then dried to form an adhesive layer; thus, a high-performance thermal transfer resin ribbon is obtained.

[0036] The beneficial effect of adopting the above scheme is that high-performance thermal transfer resin ribbons can be prepared efficiently through the preparation method of the present invention.

[0037] Further, in step S3, a gravure coating or slotted-slot coating is used for the back coating layer, with a drying temperature of 50-100℃ and a drying time of 40-60s; a gravure coating or slotted-slot coating is used for the release layer, with a drying temperature of 60-100℃ and a drying time of 30-60s; a gravure coating or slotted-slot coating is used for the ink layer, with a drying temperature of 80-140℃ and a drying time of 30-120min; and a gravure coating or slotted-slot coating is used for the adhesive layer, with a drying temperature of 50-100℃ and a drying time of 30-60s.

[0038] The third objective is to provide an application of a high-performance thermal transfer resin ribbon for thermal transfer onto transportation substrates.

[0039] The layer structure after printing on the surface of the transportation substrate using the above-mentioned high-performance thermal transfer resin ribbon is as follows: a white reflective film, an adhesive layer on the surface of the white reflective film, an ink layer on the side of the adhesive layer away from the white reflective film, and a release layer on the side of the ink layer away from the adhesive layer. Attached Figure Description

[0040] Figure 1 This is a structural diagram of the high-performance thermal transfer resin ribbon of the present invention.

[0041] The attached diagram lists the components represented by each number as follows:

[0042] 1-Adhesive layer, 2-Ink layer, 3-Release layer, 4-Substrate, 5-Back coating layer. Detailed Implementation

[0043] The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. In the examples, the polyester resin has a relative molecular weight M of 5000-20000, the methacrylic acid resin has a relative molecular weight M of 20000-80000, the polyaldehyde resin has a relative molecular weight M of 20000-50000, the polyurethane has a relative molecular weight M of 2000-20000, the fluoroalkyl ethyl ether resin (PFEVE) has a relative molecular weight M of 10000-30000, the polyurethane-modified silicone resin has a relative molecular weight M of 3000-50000, the acrylic acid-modified silicone resin has a relative molecular weight M of 3000-50000, the polyvinyl alcohol acetal resin has a relative molecular weight M of 20000-60000, and the polyvinyl alcohol butyral resin is a polyvinyl alcohol butyral resin or a polyvinyl alcohol butyral resin with a relative molecular weight M of 30000-50000.

[0044] Example 1

[0045] This embodiment of a high-performance thermal transfer resin ribbon includes, from top to bottom, an adhesive layer, an ink layer, a release layer, a substrate, and a back coating layer; see Table 1 for details.

[0046] The adhesive layer is formed by applying an adhesive coating, wherein the resin in the adhesive layer is polyester resin, the organosilicon is methylsiloxane, and the light stabilizer is salicylic acid ester.

[0047] The ink layer is formed by coating with ink layer paint. The solvent-based fluororesin is fluoroalkyl ethyl ether resin (PFEVE), the pigment is azo pigment, the light stabilizer is benzophenone, and the curing agent is a polyisocyanate such as hexamethylene diisocyanate (HDI).

[0048] The release layer is formed by applying a release layer coating, wherein the acrylic resin is methyl methacrylate, the fluorinated additive is fluorosilane, the light stabilizer is benzotriazole, and the wax powder is carnauba wax.

[0049] The substrate is a transparent flexible plastic film, specifically PET.

[0050] The back coating is a polyurethane-modified silicone resin and an acrylic-modified silicone resin, with a weight ratio of 1:1.

[0051] This embodiment uses a method for preparing a high-performance thermal transfer resin ribbon, which includes the following steps:

[0052] S1: Liquid preparation:

[0053] Adhesive coating: Dissolve the resin in methyl ethyl ketone and toluene solvent, then add light stabilizer and organosilicon, stir and mix to prepare adhesive coating for later use;

[0054] Ink layer coating: Solvent-based fluororesin is dissolved in methyl ethyl ketone and toluene solvent, then pigments, dispersants, and light stabilizers are added, stirred and mixed, and finally a curing agent is added to make ink layer coating for later use;

[0055] Release coating: Dissolve acrylic resin in methyl ethyl ketone and toluene solvent, then add fluorine-containing additives, light stabilizers and wax powder, stir and mix to prepare release coating for later use;

[0056] Back coating: One or more of polyurethane modified silicone resin, acrylic modified silicone resin, polyvinyl alcohol acetal resin, and polyvinyl alcohol butyral resin are dissolved in methyl ethyl ketone and toluene solvent, stirred and mixed to prepare a back coating for later use.

[0057] S2: Stun;

[0058] A substrate is provided, and corona discharge is applied to two opposite surfaces of the substrate;

[0059] S3: Coating;

[0060] The back coating obtained in step S1 is applied to one surface of the substrate in step S2, and then dried to form a back coating for later use.

[0061] The release layer coating obtained in step S1 is applied to the side of the substrate away from the back coating layer, and then dried to form a release layer for later use.

[0062] The ink layer coating obtained in step S1 is applied to the side of the release layer away from the substrate, and then dried to form an ink layer;

[0063] The adhesive coating obtained in step S1 is applied to the side of the ink layer away from the release layer, and then dried to form an adhesive layer; thus, a high-performance thermal transfer resin ribbon is obtained.

[0064] In step S3, a gravure coating is used to apply the back coating layer, with a drying temperature of 100°C and a drying time of 60 seconds; a gravure coating is used to apply the release layer coating, with a drying temperature of 100°C and a drying time of 60 seconds; a gravure coating is used to apply the ink layer coating, with a drying temperature of 100°C and a drying time of 120 minutes; and a gravure coating is used to apply the adhesive layer coating, with a drying temperature of 100°C and a drying time of 60 seconds.

[0065] After obtaining the resin ribbon, a heat transfer-based printing press is used to print the adhesive layer, ink layer, and release layer onto the surface of the white reflective film, and tests are conducted on solvent resistance, printing performance, weather resistance, and scratch resistance.

[0066] Example 2

[0067] In this embodiment, compared with Example 1, the amount of wax powder in the release layer is 2 parts, and the rest is the same as in Example 1. See Table 1 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a heat transfer printing machine, and tests are performed on solvent resistance, printing, weather resistance, scratch resistance and other properties.

[0068] Example 3

[0069] In this embodiment, compared with Example 1, the amount of acrylic resin in the release layer is 70 parts, and the rest is the same as in Example 1. See Table 1 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a heat transfer printing machine, and tests are performed on solvent resistance, printing, weather resistance, scratch resistance and other properties.

[0070] Example 4

[0071] In this embodiment, compared to Example 1, the pigment in the ink layer is phthalocyanine pigment, the curing agent is polyisocyanate, and the rest is the same as in Example 1. See Table 1 for details. After obtaining the resin ribbon, the adhesive layer, ink layer, and release layer are printed onto the surface of the white reflective film using a heat transfer-based printing press, and tests are performed on solvent resistance, printing performance, weather resistance, and scratch resistance.

[0072] Example 5

[0073] In this embodiment, compared with Example 1, the solvent-based fluoropolymer in the ink layer is fluoroalkyl ethyl ether resin (PFEVE), with an amount of 70 parts; the rest is the same as in Example 1. See Table 1 for details. After obtaining the resin ribbon, the adhesive layer, ink layer, and release layer are printed onto the surface of the white reflective film using a heat transfer-based printing press, and tests are conducted on solvent resistance, printing performance, weather resistance, and scratch resistance.

[0074] Example 6

[0075] In this embodiment, compared with Example 1, the amount of curing agent in the ink layer is 4 parts, and the rest is the same as in Example 1. See Table 1 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a heat transfer printing machine, and tests are performed on solvent resistance, printing, weather resistance and scratch resistance.

[0076] Example 7

[0077] In this embodiment, compared with Example 1, the amount of pigment used in the ink layer is 70 parts, and the rest is the same as in Example 1. See Table 2 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a heat transfer-based printing press, and tests are performed on solvent resistance, printing, weather resistance, scratch resistance, etc.

[0078] Example 8

[0079] In this embodiment, compared with Example 1, the ink layer thickness is 0.4 μm, and the rest is the same as in Example 1. See Table 2 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a heat transfer-based printing press, and tests are performed on solvent resistance, printing performance, weather resistance, and scratch resistance.

[0080] Example 9

[0081] In this embodiment, compared to Example 1, the adhesive layer uses methacrylic resin and polyaldehyde resin in a 1:1 ratio, the silicone is polyphenylsiloxane, the release layer uses PE wax, and the fluorinated additive is fluorinated acrylic resin. The rest is the same as in Example 1. See Table 2 for details. After obtaining the resin ribbon, the adhesive layer, ink layer, and release layer are printed onto the surface of a white reflective film using a heat transfer printing press, and tests are performed on solvent resistance, printing performance, weather resistance, and scratch resistance.

[0082] Example 10

[0083] In this embodiment, compared with Example 1, the amount of silicone in the adhesive layer is 0.4 parts, and the rest is the same as in Example 1. See Table 2 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a thermal transfer printing press, and tests are performed on solvent resistance, printing, weather resistance, scratch resistance, etc.

[0084] Example 11

[0085] In this embodiment, compared with Example 1, the thickness of the adhesive layer is 0.15 μm, and the rest is the same as in Example 1. See Table 2 for details. After obtaining the resin ribbon, the adhesive layer, ink layer and release layer are printed onto the surface of the white reflective film using a heat transfer printing press, and tests are performed on solvent resistance, printing performance, weather resistance, scratch resistance, etc.

[0086] Table 1 shows the composition and thickness of the adhesive layer, ink layer, release layer, substrate, and back coating in Examples 1-6.

[0087]

[0088] Table 2 shows the composition and thickness of the adhesive layer, ink layer, release layer, substrate, and back coating in Examples 7-11.

[0089]

[0090]

[0091] Compare with Example 1

[0092] This comparative example uses the same back coating, pigment, coating thickness, coating method, and printing method as Example 1, but replaces the three-layer structure of release layer, ink layer, and adhesive layer with a single layer of ordinary acrylic with the same thickness.

[0093] Compare with Example 2

[0094] This comparative example uses the same back coating layer, ink layer, coating thickness, coating method, and printing method as Example 1, but does not apply a release layer and an adhesive layer.

[0095] Experimental Example

[0096] The experiment evaluates the printing effect of carbon ribbon by checking for phenomena such as flaking, sticking, and poor edge cutting during printing, in accordance with the national standard for road traffic reflective film: GB / T 18833-2012.

[0097] (1) The solvent resistance of the samples was evaluated in the following ways:

[0098] Soak it in gasoline for 10 minutes and observe whether wrinkles, bubbles, cracks, or dissolution appear on its surface;

[0099] Soak in gasoline for 10 minutes, measure the percentage of retroreflection coefficient remaining after soaking, and measure the color difference before and after soaking.

[0100] (2) The weather resistance of the samples was evaluated in the following ways:

[0101] The xenon lamp aging test chamber was used for 1800 hours to measure the percentage of retroreflection coefficient remaining after accelerated aging, and the color difference value before and after accelerated aging was measured.

[0102] (3) The scratch resistance of the samples was evaluated in the following ways:

[0103] The wear test was performed by rubbing the material 500 times with an abrasion machine, and the mass loss before and after the abrasion test was measured. The results are detailed in Tables 3 to 5.

[0104] Table 3 Experimental results of Examples 1-6

[0105]

[0106]

[0107] Table 4 Experimental results of Examples 7-11

[0108]

[0109]

[0110] Table 5 shows the experimental results compared to Examples 1-2.

[0111]

[0112]

[0113] In summary, this invention provides a high-performance resin ribbon for the transportation industry based on thermal transfer printing. The ink layer is mainly composed of solvent-based fluororesin, making it more adaptable to various outdoor environments. Addressing the difficulty in transferring fluororesin to reflective film after cross-linking and curing, a three-layer resin ribbon structure consisting of an adhesive layer, an ink layer, and a release layer is designed. This effectively solves the problem of difficult transfer after fluororesin cross-linking and curing, resulting in good adhesion to the substrate without affecting the high performance of the fluororesin itself. It offers convenient printing while possessing superior performance compared to traditional resins. Furthermore, this resin ribbon has high overall transparency, minimizing the impact on retroreflective coefficient after printing on reflective film, making it well-suited for use on road reflective films.

[0114] 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 high-performance thermal transfer resin ribbon, characterized in that, It includes, from top to bottom, the adhesive layer, ink layer, release layer, substrate, and back coating layer; The adhesive layer is formed by applying an adhesive coating, which comprises the following components in parts by weight: 25-40 parts resin, 0.0125-0.8 parts organosilicon, and 0-1.2 parts light stabilizer; The ink layer is formed by applying an ink coating, which comprises the following components in parts by weight: 50-70 parts solvent-based fluororesin, 50-70 parts pigment, 0.025-2.1 parts light stabilizer, and 3-3.01 parts curing agent; the solvent-based fluororesin is a fluoroalkyl ethyl ether resin; the curing agent includes one or more of melamine, polyisocyanates, and their derivatives. The release layer is formed by applying a release layer coating, which comprises the following components in parts by weight: 50-70 parts of (meth)acrylic resin, 0.05-1.4 parts of fluorinated additives, 0.05-1.4 parts of light stabilizer, and 0.25-2 parts of wax powder; the fluorinated additives include one or more of fluorosilanes, fluorinated surfactants, and fluorinated acrylic resins.

2. The high-performance thermal transfer resin ribbon according to claim 1, characterized in that, The adhesive layer coating comprises the following components in parts by weight: 30-35 parts resin, 0.25-0.4 parts silicone, and 0.1-1 parts light stabilizer; the ink layer coating comprises the following components in parts by weight: 55-65 parts solvent-based fluoropolymer, 55-65 parts pigment, 0.025-2.1 parts light stabilizer, and 3-3.01 parts curing agent; the release layer coating comprises the following components in parts by weight: 55-65 parts (meth)acrylic resin, 0.1-1 parts fluorinated additive, 0.1-1 parts light stabilizer, and 0.5-1 parts wax powder.

3. The high-performance thermal transfer resin ribbon according to claim 1 or 2, characterized in that, The resin includes one or more of polyester resin, methacrylic resin, polyaldehyde resin, and polyurethane; the organosilicon includes one or more of methylsiloxane, polymethylphenylsiloxane, and polyphenylsiloxane; the light stabilizer includes one or more of salicylates, benzophenones, benzotriazoles, and triazines as ultraviolet absorbers; the pigment is an inorganic pigment and / or an organic pigment; the (meth)acrylic resin includes one or more of methyl methacrylate, acrylonitrile, ethyl acrylate, butyl acrylate, isooctyl acrylate, and isobutyl methacrylate; the wax powder includes one or more of carnauba wax, PE wax, and EVA wax.

4. The high-performance thermal transfer resin ribbon according to claim 3, characterized in that, The substrate is a transparent flexible plastic film; The back coating includes one or more of polyurethane-modified silicone resin, acrylic-modified silicone resin, polyvinyl alcohol acetal resin, and polyvinyl alcohol butyral resin.

5. The high-performance thermal transfer resin ribbon according to claim 4, characterized in that, The polyisocyanates include hexamethylene diisocyanate, isoflurone diisocyanate, dicyclohexylmethane diisocyanate, 2,4-toluene diisocyanate and 2,6-toluene diisocyanate, and diphenylmethane-4,4'-diisocyanate. The inorganic pigments include one or more of the following: oxides, chromates, sulfates, silicates, borates, molybdates, phosphates, vanadates, ferrocyanates, hydroxides, sulfides, and metals. The organic pigments include one or more of azo pigments, phthalocyanine pigments, polycyclic pigments, and arylmethane pigments; The transparent flexible plastic film includes polypropylene, polyethylene naphthalate, polyethylene terephthalate, polyethylene, polyvinyl alcohol, or polymethyl methacrylate.

6. The high-performance thermal transfer resin ribbon according to claim 1, characterized in that, The thickness of the adhesive layer is 0.3-2 μm; the thickness of the ink layer is 0.5-1.5 μm; the thickness of the release layer is 0.5-2 μm; the thickness of the substrate is 4-20 μm; and the thickness of the back coating is 0.2-1.0 μm.

7. The high-performance thermal transfer resin ribbon according to claim 6, characterized in that, The thickness of the adhesive layer is 0.3-1.0 μm; the thickness of the ink layer is 0.8-1.2 μm; the thickness of the release layer is 0.5-1.5 μm; the thickness of the substrate is 4-7 μm; and the thickness of the back coating is 0.4-0.8 μm.

8. A method for preparing a high-performance thermal transfer resin ribbon according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1: Liquid preparation: Adhesive coating: Dissolve the resin in methyl ethyl ketone and toluene solvent, then add light stabilizer and organosilicon, stir and mix to prepare adhesive coating for later use; Ink layer coating: Solvent-based fluororesin is dissolved in methyl ethyl ketone and toluene solvent, then pigments, dispersants, and light stabilizers are added, stirred and mixed, and finally a curing agent is added to make ink layer coating for later use; Release coating: Dissolve (meth)acrylic resin in methyl ethyl ketone and toluene solvent, then add fluorine-containing additives, light stabilizers and wax powder, stir and mix to prepare release coating for later use; Back coating: One or more of polyurethane modified silicone resin, acrylic modified silicone resin, polyvinyl alcohol acetal resin, and polyvinyl alcohol butyral resin are dissolved in methyl ethyl ketone and toluene solvent, stirred and mixed to prepare a back coating for later use. S2: Stun; A substrate is provided, and corona discharge is applied to two opposite surfaces of the substrate; S3: Coating; The back coating obtained in step S1 is applied to one surface of the substrate in step S2, and then dried to form a back coating for later use. The release layer coating obtained in step S1 is applied to the side of the substrate away from the back coating layer, and then dried to form a release layer for later use. The ink layer coating obtained in step S1 is applied to the side of the release layer away from the substrate, and then dried to form an ink layer; The adhesive coating obtained in step S1 is applied to the side of the ink layer away from the release layer, and then dried to form an adhesive layer; thus, a high-performance thermal transfer resin ribbon is obtained.

9. The method for preparing a high-performance thermal transfer resin ribbon according to claim 8, characterized in that, In step S3, a gravure coating or slotted-slot coating is used for the back coating layer, with a drying temperature of 50-100℃ and a drying time of 40-60s; a gravure coating or slotted-slot coating is used for the release layer, with a drying temperature of 60-100℃ and a drying time of 30-60s; a gravure coating or slotted-slot coating is used for the ink layer, with a drying temperature of 80-140℃ and a drying time of 30-120min; and a gravure coating or slotted-slot coating is used for the adhesive layer, with a drying temperature of 50-100℃ and a drying time of 30-60s.

10. The application of a high-performance thermal transfer resin ribbon according to any one of claims 1 to 7, characterized in that, The resin ribbon is used for heat transfer printing on transportation substrates.

Citation Information

Patent Citations

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    CN114274683A

  • Thermal transfer printing resin thermal transfer ribbon capable of achieving rapid printing and preparation method of thermal transfer printing resin thermal transfer ribbon

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  • Recording medium for thermal transfer image formingapparatus

    KR1020070043520A

  • Thermal transfer sheet

    US6210794B1