Film transfer printing method for digital color hot stamping and gold stamping of textiles

Abstract

The invention discloses a film transfer printing method for digital color hot stamping and gold stamping of textiles. The film transfer printing method comprises the following steps that S1, a PET transfer printing bottom film is prepared; s2, a UV printer is used for printing color UV ink on the position, needing color hot stamping, of the PET transfer printing bottom film, and a UV lamp is used for curing; a UV printer is used for printing gold stamping gloss oil at the position, needing gold stamping, of the PET transfer printing bottom film, and a UV lamp is used for curing; s3, a UV printer is used for printing white UV ink at the position of the color UV ink on the transfer printing film, and a UV lamp is used for curing; printing imitation color UV ink at the position needing gold stamping by using a UV printer, and curing by using a UV lamp; s4, a UV printer is used for evenly scattering hot melting powder on the positions, where color hot stamping and gold stamping are needed, of the transfer printing film, and excessive hot melting powder is shaken off; and S5, the hot melting powder on the transfer printing film is heated and baked through a drying device to be melted, and air blowing cooling is carried out. The method has the advantages of being simple in process, good in effect and capable of improving the printing efficiency and reducing the production cost.

Description

Technical Field

[0001] The invention relates to the technical field of digital color hot stamping and gold stamping for textiles, and in particular to a film transfer method for digital color hot stamping and gold stamping for textiles. Background Art

[0002] Thermal transfer technology is a process widely used in the printing industry. It prints the pattern on a transfer film such as PET film, and then transfers the pattern to the textile fabric through thermal transfer equipment, thereby achieving high-precision and customizable textile printing.

[0003] In thermal transfer technology, color hot stamping and hot stamping are two common printing methods, each of which has unique advantages and limitations. Color hot stamping usually involves first printing color ink on a substrate such as a thermal transfer film, then sprinkling hot melt powder on it, heating the hot melt powder, spreading it flat on the substrate, and then using a hot stamping machine to transfer the ink layer to the substrate. Hot stamping processes mainly include hot stamping and cold stamping. The principle of hot stamping is to transfer electrochemical aluminum to the surface of printed materials or other items through a hot stamping plate. The principle of cold stamping is that offset printing or silk screen printing transfers cold stamping glue with graphic information to the substrate through pressure, bonding, and peeling, transferring the metal foil to the surface of the substrate. However, in existing technologies, these two methods often need to be performed separately. Color printing and hot stamping require secondary nesting and alignment, which is inefficient, costly, and consumes a lot of time and resources.

[0004] In addition, traditional hot stamping or flocking processes are usually performed directly on a white background, which makes the exposed white background appear particularly abrupt once the hot stamping or flocking layer falls off, thus significantly affecting the overall appearance of the product. This situation not only affects the aesthetics of the product, but may also bring negative user experience to consumers.

[0005] The present invention is made based on this situation. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a film transfer method for digital color hot stamping and hot stamping of textiles which has simple procedures, good effects, can improve printing efficiency and reduce production costs.

[0007] The present invention can be achieved through the following technical solutions:

[0008] In order to solve the above technical problems, the present invention provides a film transfer method for digital color hot stamping and hot stamping of textiles, comprising the following steps:

[0009] S1, prepare PET transfer base film;

[0010] S2, using a UV printer to print color UV ink at the position where color hot stamping is required on the PET transfer base film, and using a UV lamp to cure it; using a UV printer to print hot stamping varnish at the position where hot stamping is required on the PET transfer base film, and using a UV lamp to cure it;

[0011] S3, use a UV printer to print white UV ink at the position of the colored UV ink on the transfer film, and use a UV lamp to cure it; use a UV printer to print the imitation color UV ink at the position where hot stamping is required, and use a UV lamp to cure it;

[0012] S4, use a UV printer to evenly sprinkle hot melt powder on the transfer film where color hot stamping and hot stamping are required, and shake off the excess hot melt powder;

[0013] S5, using a drying device to heat and bake the hot melt powder on the transfer film to melt it, and blowing air to cool it.

[0014] In order to further solve the technical problem to be solved by the present invention, in a film transfer method for digital color hot stamping and hot stamping of textiles provided by the present invention, the transfer film formed after step S3 includes a color hot stamping area and a hot stamping area, and the color hot stamping area includes a PET transfer base film, a color UV ink layer, a white UV ink layer and a hot melt powder layer from bottom to top, and the hot stamping area includes a PET transfer base film, a hot stamping varnish layer, an imitation color UV ink layer and a hot melt powder layer from bottom to top, wherein the color UV ink layer, the white UV ink layer, the imitation color UV ink layer and the hot stamping varnish layer are all printed using a UV printer and cured using a UV lamp.

[0015] In order to further solve the technical problem to be solved by the present invention, in a film transfer method for digital color hot stamping and hot stamping of textiles provided by the present invention, the color of the imitation color UV ink layer is consistent with the color of the hot stamping paper that needs to be hot stamped in the hot stamping area, or the color of the flocking paper that needs to be flocked in the hot stamping area.

[0016] In order to further solve the technical problem to be solved by the present invention, in a film transfer method for digital color hot stamping and hot stamping of textiles provided by the present invention, after step S5, the following steps are also included:

[0017] S6, pressing and hot stamping: turn over the transfer film and spread it on the substrate, with the side of the transfer film with hot melt powder facing the substrate, and use a hot stamping machine to perform hot stamping. After hot stamping, tear off the PET transfer bottom film;

[0018] S7, hot stamping or flocking, take hot stamping paper or flocking paper, cover it on the color hot stamping pattern, use a hot stamping machine to hot stamp, and tear off the hot stamping paper or flocking paper after hot stamping.

[0019] In order to further solve the technical problem to be solved by the present invention, in a film transfer method for digital color hot stamping and hot stamping of textiles provided by the present invention, the PET transfer base film includes a release film layer and a base paper layer, the release film layer is composed of silicon dioxide, polyethylene terephthalate resin type B, trivinyl antimony oxide and silicone oil; the base paper layer is a PET film, and glue is provided between the base paper layer and the release film layer to bond the two.

[0020] In order to further solve the technical problem to be solved by the present invention, in a film transfer method for digital color hot stamping and hot stamping of textiles provided by the present invention, the release film layer is composed of silicon dioxide, polyethylene terephthalate resin type B, trivinyl antimony oxide and silicone oil.

[0021] In order to further solve the technical problem to be solved by the present invention, the present invention provides a film transfer method for digital color hot stamping and hot stamping of textiles, wherein the hot stamping varnish is composed of photoinitiator TPO, trimethylolpropane triacrylate, dipropylene glycol diacrylate, 2-phenoxyethyl acrylate, ethoxyethoxyethyl acrylate, propylene glycol dilaurate, and polyurethane acrylate.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention has designed the concept that the color of the imitation color UV ink layer is consistent with or similar to the color of the hot stamping paper and the flocking paper, for example, the gold hot stamping corresponds to the gold imitation color. This design effectively avoids the visual defects caused by the fall of the hot stamping, ensuring that even if the hot stamping layer falls off, the exposed imitation color can be coordinated with the original color, and almost does not affect the overall appearance. Its advantage is that it improves the durability and service life of the product, allowing consumers to always enjoy a high-quality visual experience during use.

[0024] 2. The transfer film of the present invention has the following advantages: First, it is easy to produce, the color hot stamping area and the hot stamping area are independent of each other, and can be printed in one step using a UV printer with three nozzles. Subsequently, it only needs to sprinkle hot melt powder and then press the color hot stamping and hot stamping in turn to complete the transfer, and the production process is simple; second, compared with the problem that traditional transfer films need to be separately performed for color hot stamping and hot stamping, the transfer film of the present invention can achieve color hot stamping and hot stamping at the same time, the production process is simple, the production cost is lower, the production speed is faster, and it is conducive to mass production.

[0025] 3. The method for making the digital color hot stamping gold stamping transfer film of the present invention uses UV printing technology to achieve accurate printing of gold stamping varnish and color ink, imitation color ink and white ink, and at the same time ensures that the color hot stamping area and the gold stamping area do not overlap in a step-by-step manner, thereby improving production efficiency and printing quality. By printing the imitation color ink, the visual effect after the gold stamping or flocking falls off is avoided. It has the advantages of simple process flow, simultaneous printing of color hot stamping and gold stamping areas, fast printing speed and excellent finished product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 It is a schematic diagram of the film transfer process for digital color hot stamping and hot stamping of textiles;

[0028] Figure 2 It is a flowchart of the film transfer process for digital color hot stamping and hot stamping of textiles;

[0029] Figure 3 is a schematic diagram of the structure of the transfer film after the step S3 treatment;

[0030] Figure 4 is a schematic diagram of the structure of the transfer film after being processed in step S5;

[0031] Figure 5 is a schematic diagram of step S6;

[0032] Figure 6 is a schematic diagram of step S7;

[0033] Figure 7 is a schematic diagram of the printing results. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figure 1-Figure 7 As shown, a film transfer method for digital color hot stamping and hot stamping of textiles comprises the following steps:

[0036] S1, prepare PET transfer base film 1;

[0037] S2, using a UV printer to print color UV ink at the position where color hot stamping is required on the PET transfer base film 1, and using a UV lamp to cure it while printing; at the same time, using a UV printer to print hot stamping varnish at the position where hot stamping is required on the PET transfer base film 1, and using a UV lamp to cure it while printing;

[0038] S3, use a UV printer to print white UV ink at the position of the colored UV ink on the transfer film, and use a UV lamp to cure. In this step, the main function of the white UV ink is to serve as a base color, so that the pattern displayed by the colored UV ink is clearer.

[0039] At the same time, use a UV printer to print imitation color UV ink at the location where hot stamping is required, and use a UV lamp to cure it;

[0040] S4, use a UV printer to evenly sprinkle hot melt powder on the transfer film where color hot stamping and hot stamping are required, and shake off the excess hot melt powder;

[0041] S5, using a drying device to heat and bake the hot melt powder on the transfer film to melt it, and then cooling it by blowing air. In this step, the hot melt powder is sprinkled on the printed transfer film and heated to a suitable temperature to form a hot melt adhesive layer, which can be bonded to the substrate.

[0042] The above steps can complete the basic film transfer process, and hot stamping and hot stamping can be directly performed subsequently (steps S6 and S7 below).

[0043] Furthermore, the color of the imitation color UV ink layer is consistent with the color of the hot stamping paper that needs to be hot stamped in the hot stamping area, or the color of the flocking paper that needs to be flocked in the hot stamping area.

[0044] More specifically, the color of the imitation color UV ink layer and the color of the hot stamping paper that needs to be hot stamped should be consistent or have a similar tone. In addition, this principle also applies to the color of flocking paper that needs flocking. Taking gold as an example, if the color of hot stamping is set to gold, then gold or a tone similar to gold should also be given priority in the selection of imitation colors. This design concept is intended to effectively avoid aesthetic problems caused by the falling off of hot stamping. Once the hot stamping layer falls off, the exposed imitation color is consistent with the color of the hot stamping area, and has almost no negative impact on the overall look and feel, thereby ensuring that the visual effect of the product always remains coordinated and beautiful. This design not only improves the durability of the product, but also effectively extends its service life, ensuring that consumers can always enjoy a high-quality visual experience during use.

[0045] The present invention can use a UV printing device to print out a color pattern (color UV ink, white UV ink, imitation color UV ink) and a hot stamping varnish together, and then the automatic powder spreading and shaking device automatically spreads hot melt powder on the PET transfer base film and shakes off the excess hot melt powder, and finally uses a drying device to heat and melt the hot melt powder into hot melt adhesive and cool it, thereby completing the basic process of film transfer. Therefore, the present invention can realize the simultaneous printing of the color hot stamping area and the hot stamping area, and has a fast printing speed, high efficiency and good quality.

[0046] The UV printing device is provided with a UV curing lamp and at least three independent printing heads, which are a color printing head for printing color UV ink and simulated color UV ink, a white printing head for printing white UV ink, and a varnish printing head for printing hot stamping varnish.

[0047] Furthermore, after step S5, the following steps are also included:

[0048] S6, hot stamping: The PET transfer base film 1 with the solidified color pattern layer 3 is turned over so that its coating surface (i.e., the side with the hot melt powder) faces the substrate 5. The PET transfer base film 1 is laid on the surface of the substrate 5. Hot stamping is performed using a hot stamping machine at a preset temperature and pressure, so that the color pattern layer 3 is transferred from the PET transfer base film 1 and bonded to the substrate 5. After hot stamping is completed, the PET transfer base film 1 is carefully torn off, and the desired color pattern is left on the surface of the substrate 5.

[0049] S7, hot stamping or flocking: In order to further enhance the aesthetics and texture of the pattern, hot stamping or flocking can be performed on the color hot stamping pattern completed in step S6. If hot stamping is chosen, take the hot stamping paper 6, cover it on the transferred color pattern on the substrate 5, and use a hot stamping machine to perform hot stamping at a preset temperature and pressure. After the hot stamping is completed, carefully tear off the hot stamping paper 6, and the gold (or other color) pattern will be attached to specific areas of the color pattern, such as the outline or details, thereby enhancing the visual effect of the pattern. If flocking is chosen, use flocking paper instead of hot stamping paper 6, and the operation steps are the same as hot stamping. The fluff on the flocking paper will be transferred to specific areas of the color pattern under the action of pressing, giving the pattern a unique suede texture.

[0050] Furthermore, the transfer film formed after step S3 includes a color hot stamping area 2 and a hot stamping area 3, wherein the color hot stamping area 2 includes, from bottom to top, a PET transfer base film 1, a color UV ink layer 21, a white UV ink layer 22 and a hot melt powder layer 4, and the hot stamping area 3 includes, from bottom to top, a PET transfer base film 1, a hot stamping varnish layer 31, an imitation color UV ink layer 32 and a hot melt powder layer 4, wherein the color UV ink layer 21, the white UV ink layer 22, the imitation color UV ink layer 32 and the hot stamping varnish layer 31 are all printed using a UV printer and cured using a UV lamp. The film transfer method has the following advantages: first, it is easy to produce, the color hot stamping area and the hot stamping area are independent of each other, and can be printed in one step using a UV printer. Subsequently, only hot melt powder needs to be sprinkled and the color hot stamping and hot stamping can be performed in sequence to complete the transfer, and the production process is simple; second, compared with the problem that traditional transfer films need to be performed separately for color hot stamping and hot stamping, the film transfer method of the present invention can achieve color hot stamping and hot stamping at the same time, the production process is simple, the production cost is lower, the production speed is faster, and it is conducive to mass production.

[0051] Furthermore, the color of the imitation color UV ink layer 32 is consistent with the color of the hot stamping paper 6 that needs to be hot stamped in the hot stamping area 3, or the color of the flocking paper that needs to be flocked in the hot stamping area 3.

[0052] Furthermore, the PET transfer base film 1 includes a release film layer and a base paper layer, wherein the release film layer is composed of silicon dioxide, polyethylene terephthalate resin type B, trivinyl antimony oxide and silicone oil. The release film layer is a thin release layer formed on the PET film, and its main function is to enable the coloring layer and the adhesive layer to quickly separate from the PET film and be transferred and bonded to the surface of the substrate under hot pressing conditions, so the release layer has a good release performance.

[0053] The base paper layer is a PET film, and glue is provided between the base paper layer and the release film layer to bond the two. The composition of the glue is preferably ethyl acetate and a polymer of ethyl acetate.

[0054] Furthermore, the release film layer is composed of silicon dioxide, polyethylene terephthalate resin type B, trivinyl antimony oxide and silicone oil.

[0055] Further, the hot stamping varnish is composed of resin and solvent, specifically composed of photoinitiator TPO, trimethylolpropane triacrylate, dipropylene glycol diacrylate, 2-phenoxyethyl acrylate, ethoxyethoxyethyl acrylate, propylene glycol dilaurate, and polyurethane acrylate. The hot stamping varnish can provide good adhesion and excellent hiding power, so that the hot stamping foil (hot stamping paper) can be firmly attached to the surface of the product and present obvious metallic luster. In addition, the hot stamping varnish also has the characteristics of migration resistance, scratch resistance, wear resistance, high brightness, quick drying, etc., which can improve the stability and durability of the hot stamping process.

[0056] The hot stamping varnish of the present invention can be directly printed on a transfer film by a UV printer. In addition to the simple and convenient manufacturing process, high-precision metallic texture patterns and texts can be obtained, that is, high-precision and high-quality hot stamping.

Claims

1. A film transfer method for digital color hot stamping and hot stamping of textiles, characterized in that: The following steps are involved: S1, preparing a PET transfer base film (1); S2, using a UV printer to print color UV ink at the position where color hot stamping is required on the PET transfer base film (1), and curing it using a UV lamp; Use a UV printer to print hot stamping varnish on the PET transfer base film (1) at the location where hot stamping is required, and use a UV lamp to cure it; S3, using a UV printer to print white UV ink at the position of the colored UV ink on the transfer film, and using a UV lamp to cure it; Use a UV printer to print imitation color UV ink at the location where hot stamping is required, and use a UV lamp to cure it; S4, use a UV printer to evenly sprinkle hot melt powder on the transfer film where color hot stamping and hot stamping are required, and shake off the excess hot melt powder; S5, using a drying device to heat the hot melt powder on the transfer film to melt it, and blowing air to cool it.

2. A film transfer method for digital color hot stamping and hot stamping of textiles according to claim 1, characterized in that: The transfer film formed after step S3 comprises a color hot stamping area (2) and a hot stamping area (3), wherein the color hot stamping area (2) comprises, from bottom to top, a PET transfer base film (1), a color UV ink layer (21), a white UV ink layer (22) and a hot melt powder layer (4), and the hot stamping area (3) comprises, from bottom to top, a PET transfer base film (1), a hot stamping varnish layer (31), an imitation color UV ink layer (32) and a hot melt powder layer (4), wherein the color UV ink layer (21), the white UV ink layer (22), the imitation color UV ink layer (32) and the hot stamping varnish layer (31) are all printed using a UV printer and cured using a UV lamp.

3. A film transfer method for digital color hot stamping and hot stamping of textiles according to claim 2, characterized in that: The color of the imitation color UV ink layer (32) is consistent with the color of the hot stamping paper (6) that needs to be hot stamped in the hot stamping area (3), or the color of the flocking paper that needs to be flocked in the hot stamping area (3).

4. A film transfer method for digital color hot stamping and hot stamping of textiles according to claim 1, characterized in that: After step S5, The following steps are involved: S6, pressing and hot stamping, turning over the transfer film and laying it on the substrate (5), with the side of the transfer film with hot melt powder facing the substrate (5), using a pressing and hot stamping machine to perform hot stamping, and tearing off the PET transfer base film (1) after hot stamping; S7, hot stamping or flocking, take hot stamping paper (6) or flocking paper, cover the color hot stamping pattern, use a hot stamping machine to perform hot stamping, and tear off the hot stamping paper (6) or flocking paper after hot stamping.

5. The film transfer method for digital color hot stamping and hot stamping of textiles according to claim 1, characterized in that: The PET transfer base film (1) comprises a release film layer and a base paper layer, wherein the release film layer is composed of silicon dioxide, polyethylene terephthalate resin type B, trivinyl antimony oxide and silicone oil; the base paper layer is a PET film, and glue is provided between the base paper layer and the release film layer to bond the two.

6. A film transfer method for digital color hot stamping and hot stamping of textiles according to claim 5, characterized in that: The release film layer is composed of silicon dioxide, polyethylene terephthalate resin type B, trivinyl antimony oxide and silicone oil.

7. The film transfer method for digital color hot stamping and hot stamping of textiles according to claim 1, characterized in that: The hot stamping varnish is composed of a photoinitiator TPO, trimethylolpropane triacrylate, dipropylene glycol diacrylate, 2-phenoxyethyl acrylate, ethoxyethoxyethyl acrylate, propylene glycol dilaurate, and polyurethane acrylate.

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