A heat transfer material for ribbon and a process for preparing the same

Abstract

The present application relates to the technical field of heat transfer printing materials, and particularly relates to a heat transfer printing material for ribbon and a preparation process thereof, the heat transfer printing material for ribbon comprises an anti-sticking layer, a base film, a light protection oil layer and a color layer, the outer side of the base film is coated with the anti-sticking layer, the inner side is coated with the light protection oil layer, and the surface of the light protection oil layer is coated with the color layer. The heat transfer printing material for ribbon prepared by the present application is clean in the demolding process, has brightness, no burr, no powder dropping and no smearing phenomenon, and has good color adhesion, can be washed by water flow, is resistant to sunlight and rubbing, can be normally used in a high-temperature and high-humidity (60 DEG C / 80%) environment, has the advantages of good universality, wide use range and the like.

Description

Technical Field

[0001] This invention relates to the field of heat transfer materials technology, and in particular to a heat transfer material for ribbons and silk ribbons and its preparation process. Background Technology

[0002] Traditionally, text and images on ribbons and silk ribbons can be printed using various methods, including handwriting, transfer printing, heat transfer printing, pad printing, and screen printing. Handwriting is inefficient, produces simple text and images, and cannot offer rich patterns and colors. Transfer printing, including water transfer and heat transfer, involves printing the image or text onto a substrate before transferring it onto the ribbon; this is relatively complex and costly. Pad printing uses a pad printing machine to transfer text or images from a mold onto the ribbon. This requires mold making, ink application, and then using a pad printing pad to press the ink onto the ribbon; the process is cumbersome and inefficient. Screen printing requires specialized equipment and technology, often using curved screen printing machines, requiring a significant investment. Furthermore, screen printing has a limited range of tonal reproduction, making it challenging to print fine products.

[0003] Traditional hot stamping methods are slow and, due to their application, can leave indentations on the product, affecting its appearance. Furthermore, the adhesion is poor, making it prone to cracking outdoors. Additionally, electroplated aluminum ribbons are mostly gold or silver, offering limited color options and a narrow range of applications. Their adhesion is also weak, making them prone to peeling off in cold weather, affecting usability.

[0004] There are many types of substrates for ribbons, such as nylon, polyester, spandex, acrylic, polypropylene, and cotton. However, existing ribbons and tassels have poor versatility, with significant differences in transfer effects on different materials, failing to meet customers' needs for a single product that can be used on various materials. But with the rapid development of domestic printer equipment and software, more domestically produced printers have emerged, leading to higher demands for the versatility of ribbons and tassels in the market.

[0005] Therefore, those skilled in the art urgently need to develop a new heat transfer material for ribbons and silk ribbons and its preparation process, so that it has good durability, heat resistance, water wash resistance, abrasion resistance, wide applicability, and rich colors in the application of ribbon and silk ribbon transfer production, thereby providing a reliable and efficient solution for ribbon and silk ribbon transfer production. Summary of the Invention

[0006] To address the aforementioned technical problems, the purpose of this invention is to propose a heat transfer material for ribbons and ribbons and its preparation process, which aims to be more suitable for domestic ribbon and ribbon printers and improve the product's performance in terms of adhesion, water resistance, sun resistance, and abrasion resistance, thereby meeting product usage requirements and further extending the product's service life. At the same time, through experiments on different ribbon and ribbon materials, the product achieves versatility on commonly used materials in the market and has a wider range of applications.

[0007] To achieve one of the above objectives, the present invention is implemented according to the following technical solution:

[0008] A heat transfer material for ribbons and silk ribbons includes an anti-adhesive layer, a base film, a protective varnish layer, and a color layer. The anti-adhesive layer is coated on the outer side of the base film, the protective varnish layer is coated on the inner side, and the color layer is coated on the surface of the protective varnish layer.

[0009] According to the above scheme, the main function of the anti-stick layer is to improve the normal use of the product in high temperature and high humidity (60℃ / 80%) environments, preventing the color layer from sticking during high-temperature storage and transportation in summer, thus affecting the normal use of the product. Simultaneously, the anti-stick layer serves as a lubricant, anti-static agent, abrasion resistant agent, protects the base film, and protects the print head, ensuring smooth tape feeding and high-speed printing during the printing process. The main function of the protective varnish layer is to prevent fading and discoloration of the color layer, while also providing good color gloss, abrasion resistance, and water resistance, improving the product's transfer effect and service life, and expanding its application range. The color layer provides the pigments needed for transferring graphic information, ensuring color vibrancy, clear and aesthetically pleasing transferred graphics, and meeting usage requirements.

[0010] Preferably, the thickness of the anti-sticking layer is 0.3-0.5 μm, the thickness of the base film is 5-7 μm, the thickness of the protective varnish layer is 2-3 μm, and the thickness of the color layer is 4-6 μm.

[0011] Preferably, the anti-stick layer comprises the following raw materials in weight percentages: 54-73.5 wt% acrylic resin, 1-5 wt% methyl silicone oil, 0.5-1 wt% isocyanate, 20-30 wt% polytetrafluoroethylene wax, and 5-10 wt% silica.

[0012] In this scheme, the acrylic resin is preferably a high-TG resin. A high TG value can better improve the heat resistance of the anti-stick layer, avoiding re-adhesion in high-temperature environments. Simultaneously, the acrylic resin can improve the adhesion of the anti-stick layer to the base film, preventing the anti-stick layer from peeling off due to environmental changes and prolonged storage, thus affecting the normal use of the product. The methyl silicone oil backbone is composed of -Si-O-Si- bonds, possessing a structure similar to inorganic polymers with high bond energy, thus exhibiting excellent heat resistance and improving the product's heat resistance. Furthermore, methyl silicone oil has low surface tension, indicating high surface activity, thus possessing excellent defoaming, anti-foaming, isolating, and lubricating properties, further improving the state of the anti-stick coating, facilitating a better coating surface, and further enhancing the product's smoothness. The isocyanate mainly functions for silicone oil curing, further increasing the coating speed. The polytetrafluoroethylene wax is preferably high-melting-point, possessing excellent wear resistance, self-lubricating properties, chemical resistance, and thermal stability; it can significantly improve the product's wear resistance, surface smoothness, and scratch resistance, among other properties. The silica has relatively stable chemical properties, high heat resistance and high wear resistance, and also plays a role in preventing sedimentation and sagging in the anti-adhesion layer.

[0013] Preferably, the protective varnish layer comprises the following raw materials in weight percentages: 45-55 wt% montan wax, 10-20 wt% rice bran wax, 10-20 wt% SEBS resin, 5-10 wt% polyester resin elastomer, and 1-5 wt% trimellitic ester plasticizer.

[0014] In this solution, the montana wax is relatively hard, has a high melting point, is acid-resistant, chemically stable, has good gloss, and a high surface smoothness. It provides excellent gloss to the protective varnish layer, improving the color gloss of the transferred graphics and providing a certain level of protection. The rice bran wax is preferably high-purity food-grade rice bran wax, a pale yellow blocky substance with a melting point of 60-85℃. It is miscible with various natural waxes, possesses certain elasticity and moisture resistance, and can be used as a desiccant and release agent. It effectively ensures complete transfer and clean removal of the color layer, resulting in complete transfer of ribbon and silk ribbon lettering, improving the printing effect of the ribbon and silk ribbon lettering, and extending the product's shelf life in humid environments. The SEBS resin has excellent aging resistance, effectively improving the preservation of ribbon and silk ribbon graphic information. The graphic information fades slowly under normal light, resulting in a longer display period. Simultaneously, SEBS resin improves the film-forming properties of the protective varnish layer, further enhancing its surface smoothness, allowing the color layer to adhere more evenly to the coating surface. The polyester resin elastomer is preferably low in TG (trimethylbenzene), as a negative TG value can significantly improve coating adhesion and aid in film formation. The trimellitic ester plasticizer possesses excellent high-temperature resistance and good low-temperature flexibility at negative Celsius, improving the flexibility of the protective varnish layer and preventing embrittlement and peeling in low-temperature environments.

[0015] Preferably, the protective varnish layer comprises the following raw materials in weight percentages: 10-15 wt% low-TG polyester resin, 15-20 wt% medium-TG polyester resin, 15-20 wt% styrene-butadiene rubber, 25-30 wt% Fischer-Tropsch wax, 8-13 wt% microcrystalline wax, 1-2 wt% dispersant, and 20-25 wt% pigment. More preferably, the low-TG polyester resin has a TG value of 3-15, and the medium-TG polyester resin has a TG value of 30-50.

[0016] In this solution, the low-TG polyester resin enhances the adhesion between the color layer and the substrate, preventing it from easily peeling off after transfer. The medium-TG polyester resin strengthens the heat resistance of the color layer, preventing it from sticking back during high-temperature transportation or storage, thus reducing its transfer capability. The styrene-butadiene rubber (SBR) possesses excellent wear resistance, heat resistance, and aging resistance, improving the preservation of the transferred text and preventing pigment penetration into the substrate, which could reduce the color layer's opacity and affect aesthetics. It also further enhances the adhesion of the color layer, preventing the transferred graphics from peeling off and affecting usability. The Fischer-Tropsch wax and microcrystalline wax primarily improve the viscosity and wettability of the coating solution, facilitating better transfer of the color layer to the substrate surface and improving the integrity of the transferred text. The dispersant primarily disperses the pigment more evenly; generally, a dispersant suitable for the corresponding pigment is selected. The pigments are selected based on the required color of the product and are commonly used pigments in the industry.

[0017] According to another objective of the present invention, a preparation process based on the above-mentioned heat transfer material for ribbons and silk ribbons is proposed, comprising the following steps:

[0018] S1. Preparation of the anti-stick coating solution: First, prepare a mixed solvent by mixing toluene and methyl ethyl ketone at a volume ratio of 1:1. Then, disperse the polytetrafluoroethylene (PTFE) wax powder evenly in the mixed solvent and grind it to prepare a PTFE wax powder solution with a concentration of 15-25% and an average particle size of 0.3-0.5μm. Dissolve the acrylic resin in the mixed solvent to prepare an acrylic resin solution with a concentration of 15-20%. Then, mix and disperse the acrylic resin solution, methyl silicone oil, silica, and PTFE wax powder solution evenly according to the dry weight ratio to prepare an anti-stick coating solution with a concentration of 5%-10%. Add isocyanate curing agent and stir evenly before use.

[0019] S2. Prepare the protective varnish coating liquid: First, melt montan wax and rice bran wax at 120-140℃, then add SEBS resin and polyester resin elastomer and melt them at 150-160℃; then add trimellitic ester plasticizer and stir evenly, and keep warm to 110-120℃.

[0020] S3. Prepare the color layer coating liquid: First, melt the Fischer-Tropsch wax and microcrystalline wax at 110-130℃, then add polyester resin and styrene-butadiene rubber at 150-160℃, keep the temperature to 120-130℃, and finally add dispersant and pigment to disperse evenly and grind until the particle size is ≤2μm.

[0021] S4. Coat the outside of the PET film with an anti-sticking layer, using a 400-600 wire mesh roller, and dry at a temperature of 90-110℃;

[0022] S5. Apply a protective varnish layer to the inside of the PET film using a 300-400 wire mesh roller at a coating temperature of 105-110℃, then cool and dry.

[0023] S6. Apply a color layer to the surface of the protective varnish layer using a 200-300 mesh roller at a coating temperature of 110-115℃. After cooling and drying, roll up the material to obtain the heat transfer material for ribbons and silk ribbons.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The heat transfer material for ribbons and silk ribbons prepared by this invention exhibits clean delamination during the transfer process, has brightness, is free of burrs, powder shedding, and smudging, and has good color adhesion. It is waterproof, sun-resistant, and rub-resistant, and can be used normally in high temperature and high humidity (60℃ / 80%) environments. It has advantages such as good versatility and wide range of applications. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the layer structure of a heat transfer material for ribbons and silk ribbons in Embodiment 1 of the present invention. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0028] All raw materials used in this invention are purchased from conventional channels or prepared using existing technical methods.

[0029] Example 1

[0030] like Figure 1 As shown in the figure, this embodiment proposes a heat transfer material for ribbons and silk ribbons, including an anti-stick layer, a base film, a protective varnish layer and a color layer. An anti-stick layer is coated on the outer side of the base film, a protective varnish layer is coated on the inner side, and a color layer is coated on the surface of the protective varnish layer.

[0031] The anti-stick layer primarily enhances the product's performance in high-temperature and high-humidity environments (60℃ / 80%), preventing the color layer from sticking during high-temperature storage and transportation in summer, thus ensuring normal product use. Simultaneously, the anti-stick layer acts as a lubricant, anti-static agent, abrasion resistant layer, protects the base film, and protects the print head, enabling smooth tape feeding and high-speed printing. The protective varnish layer prevents fading and discoloration of the color layer, while also providing good gloss, abrasion resistance, and water resistance, improving the product's transfer effect and lifespan, and expanding its application range. The color layer provides the pigments needed for transferring graphic information, ensuring vibrant colors, clear and aesthetically pleasing transferred images, and meeting usage requirements.

[0032] In this embodiment, the thickness of the anti-sticking layer is 0.3-0.5 μm, the thickness of the base film is 5-7 μm, the thickness of the protective varnish layer is 2-3 μm, and the thickness of the color layer is 4-6 μm.

[0033] Specifically, the anti-stick layer comprises the following raw materials in weight percentages: 54-73.5 wt% acrylic resin, 1-5 wt% methyl silicone oil, 0.5-1 wt% isocyanate, 20-30 wt% polytetrafluoroethylene wax, and 5-10 wt% silica.

[0034] The acrylic resin is preferably a high-TG resin. A high TG value can better improve the heat resistance of the anti-stick layer, preventing it from sticking back in high-temperature environments. Simultaneously, acrylic resin can improve the adhesion of the anti-stick layer to the base film, preventing it from peeling off due to environmental changes and prolonged storage, thus ensuring the normal use of the product. The methyl silicone oil's main chain is composed of -Si-O-Si- bonds, possessing a structure similar to inorganic polymers with high bond energy, resulting in excellent heat resistance and improving the product's overall heat resistance. Furthermore, methyl silicone oil has low surface tension, indicating high surface activity. Therefore, it exhibits excellent defoaming, anti-foaming, isolating, and lubricating properties, further improving the state of the anti-stick coating, facilitating a better coating surface, and enhancing the product's smoothness. The isocyanate primarily functions to cure the silicone oil, further increasing the coating speed. The polytetrafluoroethylene wax is preferably high-melting-point, possessing excellent wear resistance, self-lubricating properties, chemical resistance, and thermal stability; it can significantly improve the product's wear resistance, provide a smooth surface feel, and enhance scratch resistance, among other properties. The silica has relatively stable chemical properties, high heat resistance and high wear resistance, and also plays a role in preventing sedimentation and sagging in the anti-adhesion layer.

[0035] In this embodiment, the protective varnish layer comprises the following raw materials in weight percentage: 45-55 wt% montan wax, 10-20 wt% rice bran wax, 10-20 wt% SEBS resin, 5-10 wt% polyester resin elastomer, and 1-5 wt% trimellitic ester plasticizer.

[0036] The montana wax is relatively hard, has a high melting point, is acid-resistant, chemically stable, has good gloss, and a high surface smoothness. It provides excellent gloss to the protective varnish layer, improving the color gloss of the transferred graphics and providing a certain level of protection. The rice bran wax is preferably high-purity food-grade rice bran wax, a pale yellow blocky substance with a melting point of 60-85℃. It is miscible with various natural waxes, has a certain degree of elasticity and moisture resistance, and can be used as a desiccant and release agent. It effectively ensures complete transfer and clean removal of the color layer, resulting in complete transfer of ribbon and silk ribbon lettering, improving the printing effect of ribbon and silk ribbon lettering, and extending the product's shelf life in humid environments. The SEBS resin has excellent aging resistance, effectively improving the preservation of ribbon and silk ribbon graphic information. The graphic information fades slowly under normal light, resulting in a longer display period. Simultaneously, SEBS resin improves the film-forming properties of the protective varnish layer, better enhancing its surface smoothness, allowing the color layer to adhere more evenly to the coating surface. The polyester resin elastomer is preferably low in TG (trimethylbenzene), as a negative TG value can significantly improve coating adhesion and aid in film formation. The trimellitic ester plasticizer possesses excellent high-temperature resistance and good low-temperature flexibility at negative Celsius, improving the flexibility of the protective varnish layer and preventing embrittlement and peeling in low-temperature environments.

[0037] In this embodiment, the protective varnish layer comprises the following raw materials in weight percentages: 10-15 wt% low-TG polyester resin, 15-20 wt% medium-TG polyester resin, 15-20 wt% styrene-butadiene rubber, 25-30 wt% Fischer-Tropsch wax, 8-13 wt% microcrystalline wax, 1-2 wt% dispersant, and 20-25 wt% pigment. More preferably, the low-TG polyester resin has a TG value of 3-15, and the medium-TG polyester resin has a TG value of 30-50.

[0038] The low-TG polyester resin enhances the adhesion between the color layer and the substrate, preventing it from easily peeling off after transfer. The medium-TG polyester resin strengthens the heat resistance of the color layer, preventing it from sticking back during high-temperature transportation or storage, thus reducing its transfer capability. The styrene-butadiene rubber (SBR) possesses excellent wear resistance, heat resistance, and aging resistance, improving the preservation of transferred text and preventing pigment penetration into the substrate, which could reduce the color layer's opacity and affect aesthetics. It also further enhances the adhesion of the color layer, preventing the transferred graphics from peeling off and affecting usability. The Fischer-Tropsch wax and microcrystalline wax primarily improve the viscosity and wettability of the coating solution, facilitating better transfer of the color layer to the substrate surface and improving the integrity of the transferred text. The dispersant primarily disperses the pigment more evenly; generally, a dispersant suitable for the corresponding pigment is selected. The pigments are selected based on the required color of the product and are commonly used pigments in the industry.

[0039] Example 2

[0040] This embodiment proposes a preparation process for the heat transfer material for ribbons and silk ribbons described in Embodiment 1, including the following steps:

[0041] S1. Preparation of the anti-stick coating solution: First, prepare a mixed solvent by mixing toluene and methyl ethyl ketone at a volume ratio of 1:1. Then, disperse the polytetrafluoroethylene (PTFE) wax powder evenly in the mixed solvent and grind it to prepare a PTFE wax powder solution with a concentration of 15-25% and an average particle size of 0.3-0.5μm. Dissolve the acrylic resin in the mixed solvent to prepare an acrylic resin solution with a concentration of 15-20%. Then, mix and disperse the acrylic resin solution, methyl silicone oil, silica, and PTFE wax powder solution evenly according to the dry weight ratio to prepare an anti-stick coating solution with a concentration of 5%-10%. Add isocyanate curing agent and stir evenly before use.

[0042] S2. Prepare the protective varnish coating liquid: First, melt montan wax and rice bran wax at 120-140℃, then add SEBS resin and polyester resin elastomer and melt them at 150-160℃; then add trimellitic ester plasticizer and stir evenly, and keep warm to 110-120℃.

[0043] S3. Prepare the color layer coating liquid: First, melt the Fischer-Tropsch wax and microcrystalline wax at 110-130℃, then add polyester resin and styrene-butadiene rubber at 150-160℃, keep the temperature to 120-130℃, and finally add dispersant and pigment to disperse evenly and grind until the particle size is ≤2μm.

[0044] S4. Coat the outside of the PET film with an anti-sticking layer, using a 400-600 wire mesh roller, and dry at a temperature of 90-110℃;

[0045] S5. Apply a protective varnish layer to the inside of the PET film using a 300-400 wire mesh roller at a coating temperature of 105-110℃, then cool and dry.

[0046] S6. Apply a color layer to the surface of the protective varnish layer using a 200-300 mesh roller at a coating temperature of 110-115℃. After cooling and drying, roll up the material to obtain the heat transfer material for ribbons and silk ribbons.

[0047] Application examples

[0048] The ribbon prepared in Example 2 was used with a heat transfer material and a dedicated printer. The print head temperature was around 180°C, which effectively transferred the various materials in the product without burrs, powdering, or smudging. The print head structure, using a flat-pressure method, provides a large contact area between the print head and the product, increasing printing speed. The specific operation method is as follows: After installing the product of this invention in a specific position, open the dedicated software to set the template. After successful setup, print with one click. The production process is environmentally friendly and odorless, producing a perfect and natural effect. The operation is simple and the product is ready immediately.

[0049] The product of this invention was tested according to the corresponding testing methods, and the test results are as follows:

[0050] 1. The heat transfer material for ribbons and silk ribbons described in this invention exhibits clean delamination during the transfer process, has brightness, is free of burrs, and does not shed powder or smudge.

[0051] 2. Excellent color adhesion: After the product is transferred to the substrate by the printer, the transferred information does not peel off after being rubbed 30 times with a non-woven fabric at 500g force using a multi-functional friction tester.

[0052] 3. Waterproofing: After the product is transferred to the substrate by the printer, it is rinsed under running water for 1 minute. The transferred information does not peel off.

[0053] 4. After being placed in high temperature and high humidity (60℃ / 80%) for 24 hours, the product did not show any deformation or loose core, and the transfer effect did not change significantly.

[0054] 5. The produced ribbons have been market-tested and are guaranteed to have no issues such as fading or peeling of the transferred information within three months.

[0055] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. A heat transfer material for ribbons and silk ribbons, characterized in that, It includes an anti-stick layer, a base film, a protective varnish layer, and a color layer. An anti-stick layer is applied to the outer side of the base film, a protective varnish layer is applied to the inner side, and a color layer is applied to the surface of the protective varnish layer. The anti-stick layer comprises the following raw materials in weight percentages: 54-73.5 wt% acrylic resin, 1-5 wt% methyl silicone oil, 0.5-1 wt% isocyanate, 20-30 wt% polytetrafluoroethylene wax, and 5-10 wt% silica. The protective varnish layer comprises the following raw materials in weight percentages: 45-55 wt% montmorillonite wax, 10-20 wt% rice bran wax, 10-20 wt% SEBS resin, 5-10 wt% polyester resin elastomer, and 1-5 wt% trimellitic ester plasticizer. The color layer comprises the following raw materials in weight percentages: 10-15 wt% low TG polyester resin, 15-20 wt% medium TG polyester resin, 15-20 wt% styrene-butadiene rubber, 25-30 wt% Fischer-Tropsch wax, 8-13 wt% microcrystalline wax, 1-2 wt% dispersant, and 20-25 wt% pigment. The low-TG polyester resin has a TG value of 3-15, and the medium-TG polyester resin has a TG value of 30-50.

2. The heat transfer material for ribbons and silk ribbons according to claim 1, characterized in that, The thickness of the anti-sticking layer is 0.3-0.5 μm, the thickness of the base film is 5-7 μm, the thickness of the protective varnish layer is 2-3 μm, and the thickness of the color layer is 4-6 μm.

3. A heat transfer material for ribbons and silk ribbons according to claim 1 or 2, characterized in that, The base film is a PET film.

4. A preparation process for a heat transfer material for ribbons and silk ribbons according to claim 3, characterized in that, Includes the following steps: S1. Preparation of the anti-stick coating solution: First, prepare a mixed solvent by mixing toluene and methyl ethyl ketone at a volume ratio of 1:

1. Then, disperse the polytetrafluoroethylene (PTFE) wax powder evenly in the mixed solvent and grind it to prepare a PTFE wax powder solution with a concentration of 15-25% and an average particle size of 0.3-0.5μm. Dissolve the acrylic resin in the mixed solvent to prepare an acrylic resin solution with a concentration of 15-20%. Then, mix and disperse the acrylic resin solution, methyl silicone oil, silica, and PTFE wax powder solution evenly according to the dry weight ratio to prepare an anti-stick coating solution with a concentration of 5%-10%. Add isocyanate curing agent and stir evenly before use. S2. Prepare the protective varnish coating liquid: First, melt montan wax and rice bran wax at 120-140℃, then add SEBS resin and polyester resin elastomer and melt them at 150-160℃; then add trimellitic ester plasticizer and stir evenly, and keep warm to 110-120℃. S3. Prepare the color layer coating liquid: First, melt the Fischer-Tropsch wax and microcrystalline wax at 110-130℃, then add polyester resin and styrene-butadiene rubber at 150-160℃, keep the temperature to 120-130℃, and finally add dispersant and pigment to disperse evenly and grind until the particle size is ≤2μm. S4. Coat the outside of the PET film with an anti-sticking layer, using a 400-600 wire roller, and dry at a temperature of 90-110℃; S5. Apply a protective varnish layer to the inside of the PET film using a 300-400 wire mesh roller at a coating temperature of 105-110℃, then cool and dry. S6. Apply a color layer to the surface of the protective varnish layer using a 200-300 mesh roller at a coating temperature of 110-115℃. After cooling and drying, roll up the material to obtain the heat transfer material for ribbons and silk ribbons.

Images