Photosensitive tape, photosensitive thermal transfer ribbon and application thereof

Abstract

The invention belongs to the technical field of thermal printing, and particularly relates to a photosensitive tape, a photosensitive thermal transfer ribbon and application thereof. By adding the photosensitive resin, the photosensitive resin can react with the photosensitizer after exposure to form a cross-linking system, so that the transferred photosensitive layer has good stability and solvent resistance, and the service life of silk screen plate making in a solvent type ink system is ensured to the greatest extent; by combining a cross-linking system and an auxiliary material (wax or non-photosensitive resin), transfer printing of a photosensitive layer in a thermal printing mode is realized. The method is applied to silk screen plate making, the plate making process is optimized, the overall efficiency is improved, the defects that a traditional photo-sensitive resist plate making process is complex, consumed time is long, and the environment is polluted are overcome, and silk screen plate making high in adaptability to a solvent type ink system and high in stability is obtained while the efficiency is improved. According to the photosensitive thermal transfer ribbon provided by the invention, efficient transfer printing of the photosensitive layer is realized, and a pattern obtained after ultraviolet exposure has excellent solvent friction resistance and solarization resistance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of thermal printing, and particularly relates to a photosensitive tape, a photosensitive carbon tape and application thereof. BACKGROUND

[0002] The specific process of the traditional screen printing includes: manually coating a photosensitive glue on a screen printing plate, drying, then placing the screen printing plate and a film in an ultraviolet irradiation device, washing the photosensitive glue on the screen printing plate in the area not exposed to ultraviolet light with water after irradiation, drying and ultraviolet exposure of the screen printing plate again after washing, and finally obtaining the screen printing plate. The screen printing plate obtained by the above process can be printed using most inks, and the screen printing plate has stable physical and chemical properties and a long service life. However, the traditional screen printing process has the problems of complex process, long time consumption and environmental pollution.

[0003] Thermal printing mainly uses carbon tape as thermal printing consumables, and the carbon layer on the carbon tape is transferred to the surface of a substrate to be printed. With the increasing demand for different colors, people use different color fillers to replace carbon black, but the obtained tapes are collectively referred to as carbon tapes.

[0004] With the development of technology, a thermal printing plate making process is derived from thermal printing, and the specific process includes: a printhead presses a carbon film on a screen, heats the carbon film by the printhead, and then transfers the coating layer on the carbon film to the screen to finally make a screen printing plate. Compared with the traditional plate making process, the carbon film type plate making process has the advantages of simple process, high speed and low pollution. However, the screen printing plate obtained by the above thermal printing is difficult to be printed using oil-based ink, and the specific reason is that the coating layer is mainly composed of wax or resin components, and the organic solvent in the solvent-based ink will corrode and damage the screen printing plate. In actual use, the service life of the screen printing plate obtained by the traditional process under the condition of solvent-based ink printing is 8000-10000 prints, while the service life of the screen printing plate obtained by thermal printing under the condition of solvent-based ink printing is only 300-500 prints, which is far from meeting the service life requirement of the screen printing plate in the industry. SUMMARY

[0005] The present application aims to provide a photosensitive tape, a photosensitive carbon tape and application thereof. The screen printing plate obtained by the thermal printing of the photosensitive tape provided by the present application has a longer service life under the condition of solvent-based ink.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The present application provides a photosensitive tape, which comprises a back coating layer, a polymer film substrate and a photosensitive layer arranged in sequence.

[0008] The material of the photosensitive layer comprises a photosensitive resin, a photosensitive agent and an auxiliary material.

[0009] The auxiliary material includes at least one of wax and non-photosensitive resin.

[0010] Preferably, the photosensitive resin includes at least one of vinyl resin and acrylic resin.

[0011] The acrylic resin includes at least one of polyester acrylate, epoxy acrylate, polyurethane acrylate and silicone acrylate; the vinyl resin includes polyvinyl alcohol and polyvinyl acetate copolymer.

[0012] The photosensitizer includes at least one of dibenzoyl peroxide, azobisisobutyronitrile, benzoin methyl ether, 2-methylanthraquinone, benzophenone, diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide and diphenyl iodonium salt.

[0013] Preferably, the wax includes at least one of natural wax, mineral wax and synthetic wax.

[0014] The non-photosensitive resin includes at least one of terpolymer chlorovinyl resin and polyamide resin.

[0015] Preferably, the mass ratio of the photosensitive resin and photosensitizer is 50-90: 2-5.

[0016] The mass ratio of the photosensitive resin and auxiliary material is 50-90: 10-40.

[0017] Preferably, the photosensitive layer further includes an additive.

[0018] The additive includes at least one of silicon dioxide and talcum powder.

[0019] The mass ratio of the photosensitive resin and additive is 40-90: 10-60.

[0020] Preferably, the thickness of the photosensitive layer is 0.1-20 μm; the thickness of the back coating layer is 0.1-20 μm.

[0021] Preferably, a release layer is further arranged between the high polymer film matrix and the photosensitive layer, and the thickness of the release layer is 0.05-20 μm.

[0022] The application further provides a photosensitive carbon tape, which includes a back coating layer, a high polymer film matrix and a photosensitive layer arranged in sequence.

[0023] The material of the photosensitive layer includes photosensitive resin, photosensitizer, color filler and auxiliary material.

[0024] The auxiliary material includes at least one of wax and non-photosensitive resin.

[0025] The application further provides application of the photosensitive tape or the photosensitive carbon tape in thermal printing.

[0026] Preferably, the application step comprises: using the photosensitive tape or the photosensitive carbon tape as consumables, and performing exposure after thermal printing on the surface of a to-be-printed substrate.

[0027] The wavelength of the light source used in the exposure is 100-500 nm.

[0028] The application provides a photosensitive tape, which comprises a back coating layer, a polymer film substrate and a photosensitive layer arranged in sequence.

[0029] In specific thermal printing applications, the photosensitive resin can react with the photosensitive agent to form a crosslinking system after exposure, so that the transferred photosensitive layer has good stability and solvent resistance, and the service life of screen plate making in a solvent-based ink system is maximized; by combining the crosslinking system and the auxiliary material (wax or non-photosensitive resin), the photosensitive layer is transferred by thermal printing. In the process of screen plate making, the plate making process is optimized, the overall efficiency is improved, and the disadvantages of traditional photosensitive adhesive plate making, such as complex process, long time consumption, environmental pollution and the like, are avoided. Through the combination of the photosensitive tape and the thermal printing method, the screen plate making process is optimized, the efficiency is improved, and a screen plate making with strong adaptability and strong stability to the solvent-based ink system is obtained.

[0030] The application further provides a photosensitive carbon tape, which comprises a back coating layer, a polymer film substrate and a photosensitive layer arranged in sequence. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A physical picture of a screen plate made of the photosensitive tape of Example 2 after printing 10,000 times;

[0032] Figure 2 A physical picture of a screen plate after printing 500 times. DETAILED DESCRIPTION

[0033] The application provides a photosensitive tape, which comprises a back coating layer, a polymer film substrate and a photosensitive layer arranged in sequence.

[0034] The material of the photosensitive layer comprises a photosensitive resin, a photosensitizer and an auxiliary material;

[0035] The auxiliary material comprises at least one of a wax and a non-photosensitive resin.

[0036] In the present application, the photosensitive resin preferably comprises at least one of a vinyl resin and an acrylic resin; the acrylic resin preferably comprises at least one of a polyester acrylate, an epoxy acrylate, a polyurethane acrylate and a silicone acrylate; the vinyl resin preferably comprises a polyvinyl alcohol and a polyvinyl acetate copolymer; and the photosensitizer preferably comprises at least one of dibenzoyl peroxide, azobisisobutyronitrile, benzoin methyl ether, 2-methylanthraquinone, benzophenone, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide and diphenyl iodonium salt.

[0037] In the present application, the wax preferably comprises at least one of a natural wax, a mineral wax and a synthetic wax; the natural wax preferably comprises at least one of beeswax and palm wax; the mineral wax preferably comprises paraffin wax; and the synthetic wax preferably comprises polyethylene wax. In the present application, the non-photosensitive resin preferably comprises at least one of a terchloroacetic resin and a polyamide resin (PA). In the present application, the mass ratio of the photosensitive resin and the photosensitizer is preferably 50-90:2-5, further preferably 60-80:3-5, and more preferably 70:5; and the mass ratio of the photosensitive resin and the auxiliary material is preferably 50-90:10-40, further preferably 60-80:20-30, and specifically 70:20 or 70:25. In the present application, the thickness of the photosensitive layer is preferably 0.1-20 μm, and specifically 0.1 μm, 1 μm, 1.5 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 15 μm or 20 μm.

[0038] In the present application, the photosensitive layer further preferably comprises an additive; the additive preferably comprises at least one of silica and talc powder; the particle size of the additive is preferably micron grade; and the mass ratio of the photosensitive resin and the additive is preferably 40-90:10-60, and specifically 70:12 or 70:15. In the present application, the additive can improve the thermal printing transfer speed and printing fineness, and the talc powder is more economical.

[0039] In the present application, the material of the back coating layer preferably comprises a polyurethane resin; and the thickness of the back coating layer is preferably 0.1-20 μm, and specifically 0.1 μm, 0.2 μm, 1 μm, 5 μm, 10 μm, 15 μm or 20 μm.

[0040] In the present application, the material of the polymer film substrate preferably includes PET. In the present application, the thickness of the polymer film substrate is preferably 4.5-12 μm.

[0041] In the present application, a release layer is further preferably arranged between the polymer film substrate and the photosensitive layer, the material of the release layer preferably includes EVA resin and synthetic wax, the synthetic wax preferably includes at least one of polyethylene wax and polypropylene wax. In the present application, the mass ratio of the EVA resin and the synthetic wax is preferably 3-35:65-97, and can be specifically 15:85. In the present application, the thickness of the release layer is preferably 0.05-20 μm, and can be specifically 0.05 μm, 0.1 μm, 0.5 μm, 1 μm, 5 μm, 10 μm, 15 μm, or 20 μm.

[0042] In the present application, the preparation method of the photosensitive tape preferably includes the following steps:

[0043] providing a back coating layer solution and a photosensitive layer solution;

[0044] coating the back coating layer solution on one side of the polymer film substrate to obtain a back coating layer;

[0045] coating the photosensitive layer solution on the other side of the polymer film substrate to obtain a photosensitive layer.

[0046] The present application provides a back coating layer solution and a photosensitive layer solution.

[0047] In the present application, the preparation of the back coating layer solution preferably includes mixing polyurethane resin and organic solvent to obtain a back coating layer solution. In the present application, the organic solvent preferably includes benzene solvents, and is specifically preferably toluene, and the mass ratio of the polyurethane resin and the organic solvent is preferably 2-15:80-98.

[0048] In the present application, the photosensitive layer solution preferably includes the following components in the following mass fractions: photosensitive resin 50-90 parts, photosensitizer 2-5 parts, auxiliary material 10-40 parts, dispersant 0.001-0.5 parts, stabilizer 0.1-1 parts, and water 10-50 parts. In the present application, the dispersant preferably includes hydrophobically modified acrylic polymer or branched fatty alcohol alkoxylate, the specific model of the hydrophobically modified acrylic polymer preferably includes Dow ACUSOL 845, and the specific model of the branched fatty alcohol alkoxylate preferably includes Ecowet OX-4070. In the present application, the stabilizer preferably includes diethylene triamine pentaformyl phosphoric acid.

[0049] In the present application, the preparation method of the photosensitive layer solution preferably comprises the following steps: after mixing the components included in the photosensitive layer solution, sequentially performing primary dispersion, grinding and re-dispersion. In the present application, the primary dispersion is preferably performed under the condition of stirring, the stirring speed is preferably 200-600 rpm, and specifically can be 200 rpm, 300 rpm, 400 rpm, 500 rpm or 600 rpm, and the time is preferably 0.5-3 h, and specifically can be 0.5 h, 1 h, 2 h or 3 h. In the present application, the grinding is preferably performed by using a three-roll grinder or a horizontal grinder, and the grinding time is preferably 1-5 h, and specifically can be 1 h, 2 h, 3 h, 4 h or 5 h. In the present application, the re-dispersion is preferably performed under the condition of stirring, the stirring speed is preferably 300-800 rpm, and specifically can be 300 rpm, 400 rpm, 500 rpm, 600 rpm, 700 rpm or 800 rpm, and the time is preferably 0.5-5 h, and specifically can be 0.5 h, 1 h, 2 h, 3 h, 4 h or 5 h.

[0050] After obtaining the back coating layer solution, the present application coats the back coating layer solution on one side of the polymer film substrate to obtain a back coating layer. The present application does not have special limitations on the coating process, and any process known to those skilled in the art can be used. After the coating, the present application also preferably includes drying the obtained wet film.

[0051] After obtaining the photosensitive layer solution, the present application coats the photosensitive layer solution on the other side of the polymer film substrate to obtain a photosensitive layer. The present application does not have special limitations on the coating process, and any process known to those skilled in the art can be used. After the coating, the present application also preferably includes drying the obtained wet film.

[0052] In the present application, when the photosensitive tape further includes a release layer, the release layer is prepared before the preparation of the photosensitive layer; the preparation of the release layer preferably comprises: melting the EVA resin and synthetic wax, coating the molten liquid on the other side of the polymer film substrate, and performing cooling or drying solidification.

[0053] The present application also provides a photosensitive carbon tape, which comprises a back coating layer, a polymer film substrate and a photosensitive layer arranged in sequence.

[0054] The material of the photosensitive layer includes a photosensitive resin, a photosensitive agent, a color filler and an auxiliary material.

[0055] The auxiliary material includes at least one of a wax and a non-photosensitive resin.

[0056] In the present application, the color filler preferably comprises at least one of pigments and dyes. The present application does not have special limitation on the type of the color filler, which can be adjusted according to actual needs. The pigments preferably comprise carbon black or phthalocyanine blue; and the mass ratio of the photosensitive resin and the color filler is preferably 80-98:2-20, and specifically can be 70:15.

[0057] In the present application, the photosensitive carbon tape has the same structure as the photosensitive tape in the above technical solution, except that the color filler is added in the photosensitive layer. The structure and preparation method of the photosensitive carbon tape are referred to the structure and preparation method of the photosensitive tape, which will not be described here.

[0058] The present application also provides the application of the photosensitive tape in the above technical solution or the photosensitive carbon tape in the above technical solution in thermal printing.

[0059] In the present application, the application step preferably comprises: using the photosensitive tape in the above technical solution or the photosensitive carbon tape in the above technical solution as consumables, and performing exposure after thermal printing on the surface of the to-be-printed substrate; and the wavelength of the light source used in the exposure is 100-500 nm.

[0060] The present application does not have special limitation on the process of the thermal printing, which can be performed using the process well known to those skilled in the art. In the present application, the wavelength of the light source used in the exposure is 100-500 nm, and specifically preferably is 100 nm, 200 nm, 300 nm, 395 nm, 400 nm or 500 nm.

[0061] In the present application, the thermal printing of the photosensitive tape preferably comprises preparing a screen plate using the thermal printing method. In the present application, the thermal printing of the photosensitive carbon tape preferably comprises preparing a screen plate using the thermal printing method or preparing a required pattern on the to-be-printed substrate using the thermal printing method.

[0062] Unless otherwise specified, the materials and devices used in the present application are commercially available in the art.

[0063] The technical solutions in the present application will be described clearly and completely in the present application by combining with the embodiments in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0064] Embodiment 1

[0065] The polyurethane and toluene are mixed in a mass ratio of 2:98 to obtain a back coating solution;

[0066] The EVA resin and PE wax are melted in a mass ratio of 15:85 to obtain a release layer melt;

[0067] The polyvinyl alcohol and polyvinyl acetate copolymer 70 parts, benzophenone 5 parts, polyethylene wax 20 parts, dispersant (specifically, Dow ACUSOL845) 0.5 parts, stabilizer (specifically, diethylene triamine pentaformal phosphate) 1 part and water 30 parts are sequentially subjected to primary dispersion (500 rpm, 1.5 h), grinding (three-roll grinder, 60 min) and re-dispersion (800 rpm, 3 h);

[0068] The back coating solution is coated on one side of the PET film with a thickness of 4.5 μm, and after drying, a back coating layer with a thickness of 0.2 μm is obtained;

[0069] The release layer melt is coated on the other side of the PET film, and after drying, a release layer with a thickness of 0.5 μm is obtained;

[0070] The photosensitive layer solution is coated on the surface of the release layer, and after drying, a photosensitive layer with a thickness of 1.5 μm is obtained, i.e. a photosensitive tape is obtained.

[0071] Example 2

[0072] The polyurethane and toluene are mixed in a mass ratio of 2:98 to obtain a back coating solution;

[0073] The polyvinyl alcohol and polyvinyl acetate copolymer 70 parts, benzophenone 5 parts, polyethylene wax 20 parts, dispersant (specifically, Dow ACUSOL845) 0.5 parts, stabilizer (specifically, diethylene triamine pentaformal phosphate) 1 part and water 30 parts are sequentially subjected to primary dispersion (500 rpm, 1.5 h), grinding (three-roll grinder, 60 min) and re-dispersion (800 rpm, 3 h);

[0074] The back coating solution is coated on one side of the PET film with a thickness of 4.5 μm, and after drying, a back coating layer with a thickness of 0.2 μm is obtained;

[0075] The photosensitive layer solution is coated on the other side of the PET film, and after drying, a photosensitive layer with a thickness of 1.5 μm is obtained, i.e. a photosensitive tape is obtained.

[0076] Example 3

[0077] The polyurethane and toluene are mixed in a mass ratio of 2:98 to obtain a back coating solution;

[0078] The EVA resin and PE wax are melted in a mass ratio of 15:85 to obtain a release layer melt;

[0079] Polyvinyl alcohol and polyvinyl acetate copolymer 70 parts, benzophenone 5 parts, polyamide resin PA 25 parts, dispersant (specifically, Dow ACUSOL845) 0.5 parts, stabilizer (specifically, diethylene triamine pentaformal phosphate) 1 part and water 30 parts were sequentially subjected to primary dispersion (500 rpm for 1.5 h), grinding (three-roll grinder, 60 min) and re-dispersion (800 rpm for 3 h);

[0080] A back coating solution was coated on one side of a PET film with a thickness of 4.5 μm, and after drying, a back coating layer with a thickness of 0.2 μm was obtained;

[0081] A release layer melt solution was coated on the other side of the PET film, and after drying, a release layer with a thickness of 0.5 μm was obtained;

[0082] A photosensitive layer solution was coated on the surface of the release layer, and after drying, a photosensitive layer with a thickness of 1.5 μm was obtained, i.e., a photosensitive tape was obtained.

[0083] Example 4

[0084] Polyurethane and toluene were mixed in a mass ratio of 2:98 to obtain a back coating solution;

[0085] EVA resin and PE wax were melted in a mass ratio of 15:85 to obtain a release layer melt solution;

[0086] Polyvinyl alcohol and polyvinyl acetate copolymer 70 parts, benzophenone 5 parts, polyethylene wax 20 parts, silica 15 parts, dispersant (specifically, Dow ACUSOL845) 0.5 parts, stabilizer (specifically, diethylene triamine pentaformal phosphate) 1 part and water 40 parts were sequentially subjected to primary dispersion (500 rpm for 1.5 h), grinding (three-roll grinder, 100 min) and re-dispersion (800 rpm for 4 h);

[0087] A back coating solution was coated on one side of a PET film with a thickness of 4.5 μm, and after drying, a back coating layer with a thickness of 0.2 μm was obtained;

[0088] A release layer melt solution was coated on the other side of the PET film, and after drying, a release layer with a thickness of 0.5 μm was obtained;

[0089] A photosensitive layer solution was coated on the surface of the release layer, and after drying, a photosensitive layer with a thickness of 1.5 μm was obtained, i.e., a photosensitive tape was obtained.

[0090] Example 5

[0091] Polyurethane and toluene were mixed in a mass ratio of 2:98 to obtain a back coating solution;

[0092] The EVA resin and PE wax were melted in a ratio of 15:85 by mass to obtain a release layer melt;

[0093] Polyvinyl alcohol and polyvinyl acetate copolymer 70 parts, benzophenone 5 parts, polyethylene wax 20 parts, talc 12 parts, dispersant (specifically, Dow Chemical's ACUSOL 845) 0.5 parts, stabilizer (specifically, diethylene triamine pentaformal phosphate) 1 part, and water 30 parts were sequentially subjected to primary dispersion (500 rpm, 1.5 h), grinding (three-roll grinder, 100 min), and re-dispersion (800 rpm, 4 h);

[0094] A back coating solution was coated on one side of a PET film having a thickness of 4.5 μm, and after drying, a back coating layer having a thickness of 0.2 μm was obtained;

[0095] A release layer melt was coated on the other side of the PET film, and after drying, a release layer having a thickness of 0.5 μm was obtained;

[0096] A photosensitive layer solution was coated on the surface of the release layer, and after drying, a photosensitive layer having a thickness of 1.5 μm was obtained, i.e., a photosensitive tape was obtained.

[0097] Example 6

[0098] A photosensitive tape was prepared in the same manner as in Example 2, except that the polyvinyl alcohol and polyvinyl acetate copolymer was replaced with polyester acrylate.

[0099] Example 7

[0100] A photosensitive tape was prepared in the same manner as in Example 2, except that the polyvinyl alcohol and polyvinyl acetate copolymer was replaced with epoxy acrylate.

[0101] Example 8

[0102] A photosensitive tape was prepared in the same manner as in Example 2, except that the polyvinyl alcohol and polyvinyl acetate copolymer was replaced with polyurethane acrylate.

[0103] Example 9

[0104] A photosensitive carbon tape was prepared in the same manner as in Example 2, except that carbon black 15 parts was added to the photosensitive layer solution.

[0105] Performance Test

[0106] Test Example 1

[0107] The photosensitive tapes obtained in Examples 1-8 were used as consumables to prepare screen plates by thermal printing, wherein the thermal printing conditions included a thermal printing head heating temperature of 100°C, a thermal printing head printing pressure on the photosensitive tape of about 120N (about 12.3kg), and after the thermal printing was completed, exposure was performed under a 395nm ultraviolet light source;

[0108] The performance of the obtained screen plates was tested; the test method was that the obtained screen plates were printed under solvent-based ink (cyclohexanone and dimethylbenzene as solvents) and the printing times were tested; a screen plate obtained by traditional thermal printing (the main component of the coating was wax) was used as a comparison, wherein Figure 1 a physical picture of the screen plate prepared from the photosensitive tape of Example 2 after 10000 times of printing, Figure 2 a physical picture of the screen plate of the comparison after 500 times of printing; the test results are shown in Table 1;

[0109] Table 1: Printing times corresponding to the photosensitive tapes obtained in Examples 1-8

[0110] Example 1 Example 2 Example 3 Example 4 Example 5 Printing times / number of times 12000 13000 11000 10000 10000 Example 6 Example 7 Example 8 Printing times / number of times 10500 10800 10600

[0111] As can be seen from Table 1, the screen plates obtained by thermal printing of the photosensitive tapes provided by the present application can all achieve a printing service life of not less than 10000 prints under the conditions of solvent-based ink; from Figures 1-2 As can be seen, the screen plate obtained by traditional thermal printing was damaged after 500 times of printing, while the screen plate prepared from the photosensitive tape of the present application was still clear and complete after 10000 times of printing.

[0112] Test Example 2

[0113] The photosensitive carbon tape obtained in Example 9 was used as consumables to print a pattern on a polyvinyl chloride (PVC) surface by thermal printing, and after the thermal printing was completed, exposure was performed under a 395nm ultraviolet light source; the printed pattern was tested for solvent abrasion resistance and sunlight resistance;

[0114] The test process for solvent abrasion resistance was as follows: according to the GB / T 23989-2009 Coating Resistance to Solvent Wiping Test Method, the coating printed on the polyvinyl chloride surface was tested for solvent abrasion resistance by A method (manual wiping method), and the test conditions included a test plate load of 10kg±100g and a wiping frequency of 60±5 times / minute; after 60min of testing, it was found that the coating printed on the polyvinyl chloride surface was not damaged and the pattern was intact.

[0115] The test process for the lightfastness is as follows: using a xenon arc lamp with a power of 1500W; temperature and humidity: the temperature in the test room is controlled at room temperature-60℃, with a fluctuation range of ±30℃; the humidity is 20%-90%, with a fluctuation range of ±5%; a timing spraying device is provided to simulate the outdoor raining condition; the test result: after 1000 hours of test under the above test conditions, the pattern printed on the surface of the polyvinyl chloride is clear and complete, without discoloration, pattern loss or damage.

[0116] Although the above embodiments have made a detailed description of the present application, it is only a part of the embodiments of the present application, not all the embodiments, and other embodiments can be obtained according to the present embodiments without creativity, which all belong to the protection scope of the present application.

Claims

1. A photosensitive belt, characterized by, The back coating layer, the polymer film base and the photosensitive layer are arranged in sequence. The material of the photosensitive layer comprises photosensitive resin, photosensitive agent and auxiliary material. The auxiliary material comprises at least one of wax and non-photosensitive resin.

2. The photosensitive tape according to claim 1, wherein The photosensitive resin comprises at least one of vinyl resin and acrylic resin. The acrylic resin comprises at least one of polyester acrylate, epoxy acrylate, polyurethane acrylate and silicone acrylate; the vinyl resin comprises polyvinyl alcohol and polyvinyl acetate copolymer. The photosensitive agent comprises at least one of dibenzoyl peroxide, azobisisobutyronitrile, benzoin methyl ether, 2-methylanthraquinone, benzophenone, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide and diphenyl iodonium salt.

3. The photosensitive tape of claim 1, wherein, The wax comprises at least one of natural wax, mineral wax and synthetic wax. The non-photosensitive resin comprises at least one of terpolymer chlorovinyl resin and polyamide resin.

4. The photosensitive tape of claim 1, wherein, The mass ratio of the photosensitive resin and the photosensitive agent is 50-90:2-5. The mass ratio of the photosensitive resin and the auxiliary material is 50-90:10-40.

5. The photosensitive tape of claim 1, wherein The photosensitive layer further comprises additive. The additive comprises at least one of silicon dioxide and talcum powder. The mass ratio of the photosensitive resin and the additive is 40-90:10-60.

6. The photosensitive tape of claim 1, wherein, The thickness of the photosensitive layer is 0.1-20μm; the thickness of the back coating layer is 0.1-20μm.

7. The photosensitive tape of claim 1, wherein The polymer film base and the photosensitive layer are further provided with release layer, and the thickness of the release layer is 0.05-20μm.

8. A photosensitive carbon tape, characterized by, The back coating layer, the polymer film base and the photosensitive layer are arranged in sequence. The material of the photosensitive layer comprises photosensitive resin, photosensitive agent, color filler and auxiliary material. The auxiliary material comprises at least one of wax and non-photosensitive resin.

9. The photosensitive tape according to any one of claims 1-7 or the photosensitive carbon tape according to claim 8 is applied in thermal printing.

10. Use according to claim 9, characterized in that, The application comprises the following steps: using the photosensitive tape according to any one of claims 1-7 or the photosensitive carbon tape according to claim 8 as consumables, and after thermal printing on the surface of the substrate to be printed, exposing and cross-linking; The wavelength of the light source used in the exposing and cross-linking is 100-500nm.

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