A method for manufacturing a heat transfer film by UV aluminum transfer process and a heat transfer film

Abstract

The application relates to a method for manufacturing a heat transfer printing film through a UV aluminum transfer process and belongs to the technical field of heat transfer printing film processing and manufacturing. The method comprises manufacturing a main film body and manufacturing a bearing film, and the manufacturing steps of the main film body comprise the following steps: providing a base film, printing a UV curing adhesive on the base film to form a UV curing adhesive layer; pressing a metal template with a texture structure on the UV curing adhesive layer to press a texture structure layer on the UV curing adhesive layer; irradiating the UV curing adhesive layer with a UV curing lamp to cure the UV curing adhesive layer, and separating the metal template from the UV curing adhesive layer; plating a metal layer on one side of the UV curing adhesive layer with the texture structure; manufacturing a printing pattern layer on the metal layer; the manufacturing of the bearing film comprises the following steps: providing a bottom film; coating a release agent on one side of the bottom film to form a release agent layer; adhering the main film body and the bearing film to form a combined film by using adhesive glue, and peeling the base film and the UV curing adhesive layer from the combined film.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat transfer film processing and manufacturing, and particularly relates to a method for manufacturing heat transfer film by UV aluminum transfer process and heat transfer film. BACKGROUND

[0002] The heat transfer film is a kind of film bearing decorative patterns, which comprises a base film, a decorative pattern layer and a hot melt adhesive layer distributed in sequence. The heat transfer film is usually heated by a heat transfer process, and the decorative patterns on the heat transfer film are transferred to the surface of the object to be decorated. In the heat transfer process, the protective layer and the pattern layer are separated from the polyester substrate by the combined action of heat and pressure, and the hot melt adhesive permanently bonds the entire decorative layer with the object to be decorated.

[0003] The common heat transfer film in daily life is mainly divided into three categories: heat transfer film printed with color images, heat transfer film printed with metal plating layer, and heat transfer film printed with color images on the metal plating layer. However, the common heat transfer film containing metal plating layer on the market usually has a flat surface layer. The film has poor ornamental value and poor decorative effect after being printed on the printed object.

[0004] In the prior art, a film with a metal plating layer having a texture structure with better ornamental value can also be manufactured, such as the manufacturing method of a transfer film and its application disclosed in the patent with the authorization announcement No. CN112521872B. The manufacturing method in the patent comprises the following steps: providing a backing paper; preparing a layer of solidified glue on the backing paper; providing a mold; pressing the mold on the solidified glue; curing the solidified glue to obtain a transfer film; preparing a plating layer on the surface of the transfer film with microstructure patterns; providing a bottom paper; coating a layer of glue on the surface of the transfer film with microstructure patterns; pressing the surface of the transfer film with microstructure pattern grooves and the bottom paper together to form; peeling off the base film on the transfer film; printing on the surface of the transfer film after peeling off the base film to obtain a packaging paper.

[0005] Although the manufacturing method provided in the above patent provides a method for manufacturing a film containing both color image layer and metal plating layer with texture structure, if the manufacturing method of the transfer paper provided in the patent is directly applied to the manufacturing of heat transfer film, a step of pasting a layer of base film coated with release agent on the printed image layer on the packaging paper, peeling off the bottom paper on the packaging paper, and then coating a layer of hot melt adhesive on the surface of the packaging paper after peeling off the backing paper needs to be added after the manufacturing steps provided in the patent. Thus, the entire manufacturing process of the heat transfer film introduces the backing paper and two base films, and two peeling steps are required in the process of manufacturing the heat transfer film, which is more complicated. SUMMARY

[0006] The application provides a method for manufacturing a thermal transfer film by using a UV aluminum transfer process, to solve the technical problem of complex operation steps in the prior art.

[0007] The application also provides a thermal transfer film manufactured by using the method for manufacturing a thermal transfer film by using a UV aluminum transfer process, to solve the technical problem of poor ornamental value of the thermal transfer film in the prior art.

[0008] To solve the above problems, the method for manufacturing a thermal transfer film by using a UV aluminum transfer process provided by the application adopts the following technical scheme:

[0009] A method for manufacturing a thermal transfer film by using a UV aluminum transfer process, comprising the following steps:

[0010] Manufacture of a main film:

[0011] S1, provide a transparent base film, perform corona treatment or apply a chemical coating on one side of the base film to increase the surface energy of the base film, and then print a UV curing adhesive to form a UV curing adhesive layer;

[0012] S2, press a metal template with a texture structure on the UV curing adhesive layer to imprint a texture structure layer on the UV curing adhesive layer;

[0013] S3, use a UV curing lamp to irradiate the UV curing adhesive layer through the base film at the same time, so as to cure the UV curing adhesive layer, and separate the metal template from the UV curing adhesive layer;

[0014] S4, plate a metal layer on the side of the UV curing adhesive layer with the texture structure;

[0015] S5, manufacture a printing pattern layer on the metal layer;

[0016] Manufacture of a carrier film:

[0017] S1, provide a bottom film;

[0018] S2, apply a release agent on one side of the bottom film to form a release agent layer;

[0019] Use adhesive to bond the side of the manufactured main film with the printing pattern layer to the side of the carrier film with the release agent layer, so that the main film and the carrier film form a combined film;

[0020] Peel the base film and the UV curing adhesive layer from the combined film;

[0021] Apply a hot melt adhesive layer on the side of the combined film away from the carrier film after peeling the base film and the UV curing adhesive layer, to form a thermal transfer film.

[0022] The beneficial effects of the above technical scheme are: the UV curing glue is coated on the base film, the texture structure is imprinted on the pliable UV curing glue layer by using the metal template, then the UV curing glue layer is cured by using the UV curing lamp, the texture structure on the UV curing glue layer is shaped, the metal layer is plated on the side surface of the UV curing glue layer with the texture structure, the prepared film has a metallic texture, the metal layer covers the texture structure, the metal layer also has the same texture structure, and the prepared film has a more three-dimensional visual effect and better ornamental value.

[0023] After the main film is prepared, the bearing film is prepared, the main film is attached to the bearing film, the combined film is formed, the base film and the UV curing glue layer are peeled off from the combined film, the peeled base film and the UV curing glue layer can be reused, which is more environmentally friendly, and when the main film is prepared subsequently, the steps of repeatedly coating the UV curing glue and imprinting the texture structure on the UV curing glue are not needed, the production efficiency is improved, the material cost is reduced, and the material consumption is reduced.

[0024] After the metal layer is plated on the UV curing glue layer, a printing pattern layer is prepared on the metal layer, which is equivalent to attaching the metal layer to the printing pattern layer, the printing pattern layer is combined with the metal layer, the prepared film has better ornamental value, meanwhile, the printing pattern layer can serve as a base layer of the metal layer, which is equivalent to strengthening the structural strength of the metal layer, the structural strength of the metal layer is higher when the base film and the UV curing glue layer are peeled off from the metal layer, partial adhesion of the metal layer to the UV curing glue layer is avoided, the metal layer is more complete, and the metal layer is separated from the UV curing glue layer.

[0025] Only two substrates, i.e., the base film and the bottom film, are introduced in the whole preparation process, and there is only one peeling process, so that the operation steps are fewer, and the preparation is simpler.

[0026] Because the main film takes away the UV glue layer when the main film and the bearing film are separated, the present application focuses on solving another difficulty, i.e., the separation of the ink layer from the aluminum plating layer caused by the UV light oil layer when the heat transfer film is prepared by using the UV printing method, and the problem that the hot melt glue cannot penetrate the UV layer after the hot melt glue is coated.

[0027] Further, in the step S2 of preparing the main film, the metal template is a nickel plate, a photoetching machine is used to engrave the texture structure on the nickel plate, and the nickel plate with the texture structure forms the metal template.

[0028] Further, the thickness of the nickel plate ranges from 37 to 50 μm.

[0029] Further, in the step S1 of preparing the main film, the base film is a PET film with a thickness ranging from 23 to 36 μm.

[0030] Further, in the step S3 of making the main body film, the UV curing adhesive layer is first irradiated by the UV LED lamp, and after the UV curing adhesive layer is preliminarily cured, the metal template is removed from the UV curing adhesive layer, and then the UV curing adhesive layer is irradiated by the UV mercury lamp to fully cure the UV curing adhesive layer.

[0031] The beneficial effects of the above technical solution are: the metal template is first pressed on the UV curing adhesive layer to preliminarily cure the UV curing adhesive layer by the UV LED lamp. Since the UV curing adhesive layer will shrink during curing, the metal template is pressed on the UV curing adhesive layer to maintain the shape of the texture structure on the UV curing adhesive layer, thereby avoiding the texture structure on the UV curing adhesive layer from being severely deformed due to shrinkage. After the UV curing adhesive layer is preliminarily cured, the metal template is removed from the UV curing adhesive layer, and the UV curing adhesive layer is irradiated by the UV mercury lamp. Since the metal template is removed, the UV curing adhesive layer can be fully irradiated, the curing speed is faster, and the release is looser.

[0032] Further, in the step S4 of making the main body film, a layer of aluminum is plated on the texture structure layer by vacuum aluminum plating to form an aluminum plating layer, and the aluminum plating layer is the metal layer.

[0033] The beneficial effects of the above technical solution are: after the aluminum is plated on the UV curing adhesive layer, the prepared film has excellent metal luster, the aluminum plating layer has conductive properties and can eliminate static electricity, and when the prepared film is used to package powdered products, the pollution to the sealing part can be reduced to ensure the sealing performance of the package.

[0034] Further, in the step S5 of making the main body film, a layer of water-based printing coating is first coated on the surface of the aluminum plating layer, and then positioning printing is performed on the surface of the water-based printing coating to form a printing pattern layer on the surface of the water-based printing coating, and the shape of the printing pattern layer is adapted to the shape of the texture structure.

[0035] The beneficial effects of the above technical solution are: the water-based coating is coated on the aluminum plating layer, and then the printing pattern layer is printed, the water-based coating and the printing pattern layer are combined to enhance the adhesion of the printing pattern layer on the aluminum plating layer, thereby protecting the printing pattern layer, and at the same time, the aluminum plating layer is attached to the water-based coating and the printing pattern layer which have higher structural strength, thereby also improving the structural strength of the aluminum plating layer.

[0036] Further, in the step S1 of making the bearing film, the bottom film is a PET film with a thickness of 18-20 μm.

[0037] Further, after the main body film and the bearing film are laminated to form a combined film, a layer of anti-sticking layer is coated on the outer surface of the bottom film in the combined film.

[0038] The beneficial effects of the above technical solution are that a layer of anti-sticking layer is coated on the surface of the base film, so that when the prepared multiple heat transfer films are stacked, the heat transfer films will not be adhered to each other, and the heat transfer films can be taken out from the stacked multiple heat transfer films in sequence.

[0039] The application also provides a heat transfer film, which comprises:

[0040] The anti-sticking layer, the base film, the release agent layer, the UV glue layer, the printed pattern layer, the water-based printed coating layer, the metal layer and the hot melt adhesive layer are arranged in sequence from top to bottom.

[0041] The beneficial effects of the above technical solution are that the heat transfer film simultaneously has a printed pattern layer and a metal layer, and the metal layer prepared by the above manufacturing method has a texture structure, so that the formed heat transfer film is more ornamental. BRIEF DESCRIPTION OF DRAWINGS

[0042] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which several embodiments of the application are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:

[0043] Figure 1 A structure diagram of a main film prepared in a method for manufacturing a heat transfer film by a UV aluminum transfer process provided by the application;

[0044] Figure 2 A structure diagram of a carrier film prepared in a method for manufacturing a heat transfer film by a UV aluminum transfer process provided by the application;

[0045] Figure 3 A structure diagram of a combined film prepared in a method for manufacturing a heat transfer film by a UV aluminum transfer process provided by the application;

[0046] Figure 4 A structure diagram of a heat transfer film prepared in a method for manufacturing a heat transfer film by a UV aluminum transfer process provided by the application.

[0047] BRIEF DESCRIPTION OF DRAWINGS

[0048] 1, base film; 2, UV curing glue layer; 201, texture structure layer; 3, aluminum plating layer; 4, water-based coating layer; 5, printed pattern layer; 6, release agent layer; 7, base film; 8, UV composite glue; 9, hot melt adhesive layer; 10, anti-sticking layer. DETAILED DESCRIPTION

[0049] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and those skilled in the art shall know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor shall fall within the scope of protection of the present application.

[0050] The following is one of the embodiments of the method for manufacturing a heat transfer film by UV aluminum transfer process provided by the present application:

[0051] A method for manufacturing a heat transfer film by UV aluminum transfer process, comprising the following steps:

[0052] Manufacturing a main film (the structure of the manufactured main film is as shown in Figure 1

[0053] S1, providing a nickel plate with a thickness of 40 μm, using a photoetching machine to etch a preset texture structure on the nickel plate, and forming a metal template by etching the texture structure on the nickel plate;

[0054] S2, providing a transparent PET film with a thickness of 23 μm, which is a base film 1, performing corona treatment on one side of the base film 1, and coating a UV curing adhesive layer 2 on the side of the base film 1 on which the corona treatment is performed;

[0055] S3, pressing the side of the metal template with the etched texture structure on the UV curing adhesive layer 2, so as to form a texture structure layer 201 on the UV curing adhesive layer 2;

[0056] S4, irradiating the UV curing adhesive layer 2 with a UV LED lamp, removing the metal template from the UV curing adhesive layer 2 after the UV curing adhesive layer 2 is preliminarily cured, completely exposing the texture structure layer 201, and irradiating the UV curing adhesive layer 2 with a UV mercury lamp so as to completely cure the UV curing adhesive layer 2;

[0057] S5, forming an aluminum plating layer 3 by plating a layer of aluminum on the texture structure layer 201 using vacuum aluminum plating, and the aluminum plating layer 3 is a metal layer;

[0058] S6, coating a water-based printing coating layer on the surface of the aluminum plating layer 3, and performing positioning printing on the surface of the water-based printing coating layer to obtain a printed pattern layer 5, the pattern shape of the printed pattern layer 5 is matched with the texture shape of the texture structure layer 201, and the matching here means that the pattern on the printed pattern layer 5 corresponds to the side of the texture structure on the aluminum plating layer 3, and the pattern shape on the printed pattern layer 5 is consistent with the shape of the texture structure on the aluminum plating layer 3;

[0059] At the same time of manufacturing the main film, a carrier film is manufactured (the structure of the manufactured carrier film is as shown in​Figure 2 The preparation of the carrier film includes the following steps:

[0060] S1, providing a PET film with a thickness of 18 μm, which is the base film 7;

[0061] S2, coating a release agent layer 6 on one surface of the base film 7;

[0062] After the preparation of the main film and the carrier film, the main film and the carrier film are pasted together using UV composite glue 8, the printed pattern layer 5 on the main film is pasted on the release agent layer 6 on the carrier film through the UV composite glue 8, and the main film and the carrier film together constitute a combined mold, and the structure of the combined mold is as shown in Figure 3 ;

[0063] The base film 1 and the UV cured glue layer 2 are peeled off from the combined mold;

[0064] A hot melt adhesive layer 9 is coated on the side of the combined mold away from the carrier film after the base film 1 and the UV cured glue layer 2 are peeled off, forming a thermal transfer film (the structure of the thermal transfer film is as shown in Figure 4 );

[0065] A release layer 10 is coated on the outer surface of the base film 7 in the thermal transfer film;

[0066] The prepared thermal transfer film is cut into blocks using a film cutting machine to obtain thermal transfer films of a specified size.

[0067] In the above step S2 of preparing the main film, after the surface of the base film 1 is coated and treated, the UV cured glue is coated, which is beneficial to improve the bonding strength of the base film 1 and the UV cured glue layer 2. The UV cured glue coated on the surface of the base film 1 includes 10%-20% of photocured resin, 11%-20% of monofunctional acrylate, 10%-12% of difunctional acrylic acid, 4%-7% of multifunctional acrylic acid, 2%-4% of photoinitiator, 0.4%-1% of auxiliary agent and 2%-4% of nano wax. The UV cured glue prepared from the above materials has the characteristics of low viscosity and fast curing rate. At the same time, the UV cured glue has selective bonding properties, that is, the adhesion between the UV cured glue and the PET film as the base film 1 is strong, while the adhesion between the UV cured glue and the metal template made of nickel plate is low, so that the metal template can be smoothly taken out from the texture structure layer 201 on the UV cured glue layer 2.

[0068] In the step S5 of manufacturing the main film, the vacuum aluminum plating method is as follows: the surface of the texture structure layer 201 on the UV curing adhesive layer 2 is cleaned to remove surface impurities and ensure the smoothness of the surface; the prepared film is placed in a vacuum chamber, and the air in the chamber is pumped out by a mechanical pump or a molecular pump to achieve a certain vacuum degree in the chamber; a heater is used to heat the prepared film to increase the surface temperature of the texture structure layer 201; the aluminum material is placed in an electron beam evaporator, and the aluminum material is evaporated into a gaseous state by the aluminum material evaporator, and the gaseous aluminum is deposited on the surface of the texture structure layer 201 in the vacuum chamber to form an aluminum film, which is the aluminum plating layer 3. The vacuum aluminum plating method is a prior art, which is only briefly described here.

[0069] In the step of peeling the base film 1 and the UV curing adhesive layer 2 from the combined mold, the adhesion between the UV curing adhesive and the base film 1 made of PET is greater than the adhesion between the UV curing adhesive and the aluminum plating layer 3 due to the selective adhesion of the UV curing adhesive, so that the base film 1 and the UV curing adhesive layer 2 can be peeled together from the aluminum plating layer 3 without the phenomenon that the base film 1 is peeled and the UV curing adhesive layer 2 remains on the aluminum plating layer 3. At the same time, the adhesion between the UV curing adhesive layer 2 and the aluminum plating layer 3 is less than the adhesion between the printed pattern layer 5 and the release agent layer 6, so that the phenomenon that the base film 7 and the release agent layer 6 are peeled can be avoided when the base film 1 and the UV curing adhesive layer 2 are peeled.

[0070] After the preparation of the heat transfer film, the peeled base film 1 and the UV curing adhesive layer 2 (including the texture structure layer 201) are collected, and in the subsequent preparation of another main film, the steps S1-S4 of manufacturing the main film can be omitted, and the aluminum plating is directly performed on the collected base film 1 and the UV curing adhesive layer 2 to realize the recycling of the base film 1 and the UV curing adhesive layer 2 and reduce the processing procedures.

[0071] In this embodiment, the metal template is a nickel plate with a thickness of 40 μm, and in other embodiments, other sizes of nickel plates with a thickness of 37-50 μm can be selected according to the depth of the texture structure.

[0072] In this embodiment, the base film is a PET film with a thickness of 23 μm, and in other embodiments, other sizes of PET films with a thickness of 23-40 μm can be selected.

[0073] In this embodiment, the vacuum aluminum plating method is used to plate an aluminum plating layer on the texture structure layer in the UV curing adhesive layer, and in other embodiments, other metals such as zinc and copper can be plated on the texture structure layer.

[0074] In the embodiment, the bottom film is a PET film with a thickness of 18 microns. In other embodiments, the bottom film can be a PET film with a thickness of 18-20 microns.

[0075] In the embodiment, the surface of the base film is subjected to corona treatment before the UV curing adhesive is applied to the surface of the base film to improve the surface properties of the base film. In other embodiments, a chemical coating layer capable of improving the surface properties of the base film is applied to the surface of the base film before the UV curing adhesive is applied to the surface of the base film.

[0076] One of the embodiments of the heat transfer film provided by the application is as follows:

[0077] As shown in Figure 4 A heat transfer film includes, from top to bottom, an anti-sticking layer, a bottom film, a release agent layer, a UV adhesive layer, a printed pattern layer, a water-based printed pattern layer, an aluminum plating layer, and a hot melt adhesive layer.

[0078] In use, the heat transfer film is prepared by placing the heat transfer film on a heat transfer machine, attaching the hot melt adhesive layer 9 of the heat transfer film to the printing material, turning on the heat transfer machine, heating the heat transfer film, and pressing the heat transfer film against the printing material. The hot melt adhesive layer 9 melts, and the heat transfer film is firmly attached to the printing material. Then, the bottom film 7 is removed from the heat transfer film, and the part of the heat transfer film with the pattern and texture structure is left on the printing material, thereby completing the printing of the printing material. The removed bottom film 7 can be collected and recycled. The heat transfer machine described above is a prior art and is generally used with the heat transfer film. Therefore, the structure of the heat transfer machine is not described in detail.

[0079] The method for manufacturing the heat transfer film by the UV aluminum transfer process provided by the application can collect and recycle the base film 1 and the UV curing adhesive layer 2 after they are peeled off. Therefore, when manufacturing another base film, the aluminum plating process can be directly performed on the side of the texture structure of the peeled-off UV curing adhesive layer 2. Thus, the process of applying the UV curing adhesive layer 2 to the base film 1 and the process of pressing the texture structure layer 201 on the UV curing adhesive layer 2 can be omitted when manufacturing another base film. The manufacturing process of the base film is simpler, and the production efficiency is improved. In addition, the base film 1 and the UV curing adhesive layer 2 can be reused, which greatly saves the consumption of the base film 1 and the UV curing adhesive, reduces the material cost, and creates greater profit space for batch production. In the method, only one peeling step is required to manufacture the heat transfer film, and the operation is more convenient.

Claims

1. A method of making a heat transfer film for UV debossing, the method comprising: The method comprises the following steps: Manufacture of the main film: S1. Provide a transparent base film, perform corona treatment or apply a chemical coating on one side of the base film to increase the surface energy of the base film, and then print a UV curing adhesive to form a UV curing adhesive layer; S2. Press a metal template with a texture structure on the UV curing adhesive layer to imprint a texture structure layer on the UV curing adhesive layer; S3. Simultaneously irradiate the UV curing adhesive layer with a UV curing lamp through the base film to cure the UV curing adhesive layer, and separate the metal template from the UV curing adhesive layer; S4. Plate a metal layer on the side of the UV curing adhesive layer with the texture structure; S5. Manufacture a printing pattern layer on the metal layer; Manufacture of the carrier film: S1. Provide a base film; S2. Apply a release agent on one side of the base film to form a release agent layer; Use adhesive to bond the side of the manufactured main film with the printing pattern layer to the side of the carrier film with the release agent layer to form a combined film; Peel the base film and the UV curing adhesive layer from the combined film; Apply a hot melt adhesive layer on the side of the combined film away from the carrier film after peeling the base film and the UV curing adhesive layer to form a heat transfer film; In step S4 of manufacturing the main film, a layer of aluminum is plated on the texture structure layer using vacuum aluminum plating to form an aluminum plating layer, which is the metal layer; In step S5 of manufacturing the main film, first apply a layer of water-based printing coating on the surface of the aluminum plating layer, and then perform positioning printing on the surface of the water-based printing coating to form a printing pattern layer on the surface of the water-based printing coating, the shape of the printing pattern layer being adapted to the shape of the texture structure; The UV curing adhesive layer comprises 10-20% photo-curing resin, 11-20% monofunctional acrylate, 10-12% bifunctional acrylate, 4-7% multifunctional acrylate, 2-4% photo initiator, 0.4-1% additive, and 2-4% nano wax; The patterns on the printing pattern layer correspond to the sides of the texture structure on the aluminum plating layer, and the shapes of the patterns on the printing pattern layer are consistent with the shapes of the texture structure on the aluminum plating layer.

2. The method of claim 1, wherein the UV aluminum transfer process is characterized by, In step S2 of manufacturing the main film, the metal template is a nickel plate, and the texture structure is engraved on the nickel plate using a photoetching machine, and the nickel plate with the engraved texture structure forms the metal template.

3. The method for producing a heat transfer film using a UV-to-aluminum process according to claim 2, characterized in that, The thickness of the nickel plate ranges from 37 to 50 μm.

4. The method of claim 1-3, wherein the method of making a heat transfer film for UV aluminum transfer printing is characterized by, In step S1 of manufacturing the main film, the base film is a PET film with a thickness ranging from 23 to 36 μm.

5. The method of claim 1-3, wherein the method of making a heat transfer film for UV aluminum transfer printing is characterized by, In step S3 of manufacturing the main film, first irradiate the UV curing adhesive layer with a UV LED lamp, remove the metal template from the UV curing adhesive layer after the UV curing adhesive layer is preliminarily cured, and then irradiate the UV curing adhesive layer with a UV mercury lamp to fully cure the UV curing adhesive layer.

6. The method of claim 1-3, wherein the method of making a heat transfer film for UV to aluminum process printing is characterized by, In step S1 of manufacturing the carrier film, the base film is a PET film with a thickness ranging from 18 to 20 μm.

7. The method for producing a heat transfer film using a UV-to-aluminum process according to claim 1, characterized in that, After the main film and the carrier film are bonded to form a combined film, apply a release layer on the outer surface of the base film in the combined film.

8. A heat transfer film characterized by, The heat transfer film is made by the method for making heat transfer film of the UV aluminum transfer process in any one of claims 1-7, and the heat transfer film comprises: The adhesive layer, the bottom film, the release agent layer, the UV glue layer, the printed pattern layer, the water-based printed coating layer, the metal layer, and the hot melt adhesive layer are arranged in sequence from top to bottom. The adhesive layer, the bottom film, the release agent layer, the UV glue layer, the printed pattern layer, the water-based printed coating layer, the metal layer, and the hot melt adhesive layer are arranged in sequence from top to bottom.

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