An environmentally friendly transfer film and its production process

Abstract

The present invention relates to the technical field of transfer films, and discloses an environment-friendly transfer film and its production process, which solves the technical problems that harmful gases are generated during the current transfer process, causing air pollution and endangering the health of operators. It includes a carrier, and an anti-adhesive layer, a front adhesive layer, a front protective layer, a pattern printing layer, a rear protective layer and a rear adhesive layer are sequentially attached to the carrier; the front protective layer and the rear protective layer have the same structural materials; the front protective layer includes an adsorbent layer, an isolation layer and an adiabatic low specific heat capacity layer, and a metal shaping layer is arranged between the anti-adhesive layer and the front adhesive layer, and the metal shaping layer is used to prevent the deformation of the pattern printing layer after being transferred to other materials. According to the above technical solutions, the present invention uses the adiabatic low specific heat capacity layer to isolate the generated high temperature during thermal transfer, uses the adsorbent layer to adsorb gases when the pattern printing layer emits ink stains, and uses the isolation layer to isolate water vapor and oxygen during use, so as to achieve the purpose of environmental protection and high quality.

Description

Technical Field

[0001] The present invention relates to the technical field of transfer films, and more specifically, it relates to an environment-friendly transfer film and its production process. Background Art

[0002] A transfer film is a medium for the heat transfer process. The heat transfer process is to transfer the decorative pattern on the transfer film onto the surface of the decorated substrate by heating the transfer film once, forming a high-quality decorative film. Compared with the method of ordinary printed patterns, its advantage is that it can adapt to the surface shape of the substrate to be a relatively complex and changeable curved surface. Due to its high efficiency, convenience and good printing quality, the heat transfer technology is widely used in the fields of stationery, toys, bamboo and wood, hardware, glass, metal, daily necessities, cosmetics, etc.

[0003] The transfer film in the prior art mainly includes a PET film layer as the heat transfer carrier, and a release layer, a front protective layer, a rear protective layer, a printing layer, an adhesive layer, etc. sequentially coated on the PET film layer.

[0004] However, in the operation process of the transfer film in the prior art, since the heat transfer film needs to be heated to a certain temperature to achieve the transfer of the pattern during work, therefore, during the operation process of the heat transfer process, due to the heating of the material, especially the heating of the ink stains, some harmful gases will be generated on site, resulting in a relatively strong smell and a large amount of particles in the workshop. The heat transfer organic waste gas is mainly determined by the components of the used ink and organic solvent, and these components mainly refer to toluene, xylene, polycyclic aromatic hydrocarbons and their derivatives, etc. Even through the soot adsorption system for gas emission, it will cause air pollution and also harm the physical health of the operating personnel, so there is room for improvement.

[0005] There will also be a part of volatile organic compounds (VOCs). There are many types of them, such as alcohols, esters, ethers, ketones, mineral oils, etc. They will volatilize into the air along with the drying of the ink, not only polluting the air, but also threatening the physical health of the printing operators. At present, the solvent-based inks used for flexographic printing are basically aromatic hydrocarbon-free, but there are still many volatile organic solvents, which mainly affect the air quality of the printing workshop.

[0006] Thermal transfer is a new printing process that has been introduced from abroad for only over 10 years. The printing method of this process is divided into two major parts: transfer film printing and transfer processing. Transfer film printing uses dot printing (resolution up to 300 dpi) to pre-print patterns on the surface of the film. The printed patterns have rich layers, bright colors, are ever-changing, have small color differences, good reproducibility, can achieve the required effects of the pattern designers, and are suitable for mass production. Transfer processing transfers the delicate patterns on the transfer film onto the surface of the product through a thermal transfer machine in one processing step (heating and pressing). After forming, the ink layer is integrated with the product surface, looking vivid and beautiful, greatly improving the grade of the product. However, due to the relatively high technical content of this process, many materials need to be imported. Summary of the Invention

[0007] In view of the technical problem in the background art that harmful gases are generated during the operation of the transfer process, causing air pollution and endangering the health of operating personnel, the present invention uses an adiabatic low specific heat capacity layer to isolate the generated high temperature during thermal transfer, uses an adsorbent layer to adsorb gases when the pattern printing layer emits ink stains, and uses an isolation layer to isolate water vapor and oxygen during subsequent use to prevent pattern damage, so as to achieve the purpose of environmental protection and high quality.

[0008] To achieve the above object, the present invention provides the following technical solution 1:

[0009] An environment-friendly transfer film, comprising a carrier, and successively attached thereto a release layer, a front adhesive layer, a front protective layer, a pattern printing layer, a rear protective layer, and a rear adhesive layer;

[0010] The front protective layer and the rear protective layer have the same structural materials;

[0011] The front protective layer includes an adsorbent layer, an isolation layer, and an adiabatic low specific heat capacity layer. The adsorbent layer is used to adsorb gases when the pattern printing layer emits ink stains. The isolation layer is used to isolate water vapor and oxygen. The adiabatic low specific heat capacity layer is used to isolate the generated high temperature during transfer, avoiding the pattern printing layer from contacting a high-temperature environment;

[0012] A metal shaping layer is provided between the release layer and the front adhesive layer, and the metal shaping layer is used to prevent the deformation of the pattern printing layer after it is transferred onto other materials.

[0013] Through the above technical solutions, the present invention uses an adiabatic low specific heat capacity layer to isolate the high temperature generated during thermal transfer, uses an adsorbent layer to play a role in gas adsorption when the pattern printing layer emits ink stains, and uses an isolation layer to isolate water vapor and oxygen during subsequent use to prevent pattern damage, so as to achieve the purpose of environmental protection and high quality. Among them, the principle of using the adsorbent layer is thin-layer chromatography. Thin-layer chromatography is most typical in adsorption chromatography. Commonly used adsorbents are silica gel, alumina, etc. Like other chromatography methods, thin-layer chromatography can also perform chromatography based on mechanisms such as distribution, ion exchange, and molecular exclusion in addition to adsorption.

[0014] The present invention is further configured as: the adsorbent layer uses a silica gel adsorbent, or the rear protective layer can also use an activated carbon adsorbent.

[0015] The present invention is further configured as: the adiabatic low specific heat capacity layer uses low-density polyethylene, polymethyl methacrylate or polyethylene terephthalate.

[0016] The present invention is further configured as: the pattern printing layer includes a pattern carrier layer and a pattern layer. The pattern carrier layer has corresponding notches for the pattern layer, and the pattern layer is embedded and printed inside the pattern carrier layer, so that the pattern printing layer adopts an embedded printing structure.

[0017] Through the above technical solutions, by adopting different pattern printing layer structures, the pattern printing layer of this structure is an embedded pattern printing structure. The notches inside the pattern carrier can limit the deformation and damage of the pattern from expanding outwards. At the same time, during long-term use, the depth of the pattern is the depth of the notch, so that the pattern is not easily worn, ensuring the long-term use stability and high quality of the pattern.

[0018] To achieve the above object, the present invention provides the following technical solution two:

[0019] A production process of an environmentally friendly transfer film includes the following production steps:

[0020] S1. Use a laminating machine to laminate the carrier and the release layer, and coat a layer of front adhesive layer on the release layer;

[0021] S2. Laminate an adsorbent layer, an isolation layer and an adiabatic low specific heat capacity layer on the front adhesive layer in sequence to form a front protective layer;

[0022] S3. Synchronously produce the pattern printing layer on another set of equipment. First, use 3D printing to laser engrave the pattern carrier layer to form pattern notches, and then use an inkjet device to spray different amounts of pigments on the pattern notches of the pattern carrier layer to form the pattern layer, and wait for the pattern layer to dry;

[0023] S4. Laminate the printed pattern printing layer on the front protective layer on a laminating machine;

[0024] S5. Add a rear protective layer and a rear adhesive layer on the pattern printing layer;

[0025] S6. After all laminating is completed, use a winding device to wind and store the transfer film.

[0026] Through the above technical solutions, the present invention uses the adiabatic low specific heat capacity layer to isolate the high temperature generated during thermal transfer, uses the adsorbent layer to play a role in gas adsorption when the pattern printing layer emits ink stains, and uses the isolation layer to isolate water vapor and oxygen during subsequent use to prevent pattern damage, so as to achieve the purpose of environmental protection and high quality. Among them, the working principle of the adsorbent layer is thin layer chromatography. Thin layer chromatography is most typical in adsorption chromatography. Commonly used adsorbents are silica gel, alumina, etc. Like other chromatography methods, thin layer chromatography can also perform chromatography based on mechanisms such as distribution, ion exchange, and molecular exclusion in addition to adsorption.

[0027] Adopt different pattern printing layer structures. The pattern printing layer of this structure is an embedded pattern printing structure. The notch inside the pattern carrier can limit the deformation damage of the pattern expanding outward. At the same time, during long-term use, the depth of the pattern is the depth of the notch, so that the pattern is not easily worn, ensuring the long-term use stability and high quality of the pattern.

[0028] The present invention is further configured as: the adsorbent layer uses a silica gel adsorbent, or the rear protective layer can also use an activated carbon adsorbent, and the adiabatic low specific heat capacity layer uses low density polyethylene, polymethyl methacrylate or polyethylene terephthalate.

[0029] The present invention is further configured as: the pattern layer is embedded in the pattern carrier layer, so that the pigment is not easily diffused, deformed, and scratched.

[0030] The present invention is further configured as: the 3D printing process is designed by a 3D printer.

[0031] In summary, the present invention has the following beneficial effects:

[0032] (1) The present invention uses the adiabatic low specific heat capacity layer to isolate the high temperature generated during thermal transfer, uses the adsorbent layer to play a role in gas adsorption when the pattern printing layer emits ink stains, and uses the isolation layer to isolate water vapor and oxygen during subsequent use to prevent pattern damage, so as to achieve the purpose of environmental protection and high quality.;

[0033] (2) The pattern printing layer is an embedded pattern printing structure. The notch inside the pattern carrier can limit the deformation damage of the pattern expanding outward. At the same time, during long-term use, the depth of the pattern is the depth of the notch, so that the pattern is not easily worn. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the transfer film layer structure;

[0035] Figure 2 It is a schematic diagram of the front protective layer structure;

[0036] Figure 3 It is a process flow block diagram for the production of the transfer film.

[0037] Reference numerals in the drawings: 1, carrier; 2, release layer; 3, front adhesive layer; 4, front protective layer; a-1, adsorbent layer; a-2, isolation layer; a-3, adiabatic low specific heat capacity layer; 5, rear protective layer; 6, pattern printing layer; 6-1, pattern carrier layer; 6-2, pattern layer; 7, rear adhesive layer. Specific embodiments

[0038] The present invention will be further described in detail below in conjunction with the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

[0039] An environmentally friendly transfer film, combining Figure 1 and Figure 2 It can be seen that it includes a carrier 1, and a release layer 2, a front adhesive layer 3, a front protective layer 4, a pattern printing layer 6, a rear protective layer 5, and a rear adhesive layer 7 are sequentially attached to the carrier 1. The front protective layer 4 and the rear protective layer 5 have the same structural materials. The front protective layer 4 includes an adsorbent layer a-1, an isolation layer a-2, and an adiabatic low specific heat capacity layer a-3. The adsorbent layer a-1 is used to adsorb gas when the pattern printing layer 6 emits ink stains. The isolation layer a-2 is used to isolate water vapor and oxygen. The adiabatic low specific heat capacity layer a-3 is used to isolate the high temperature generated during transfer to prevent the pattern printing layer 6 from contacting a high-temperature environment.

[0040] A metal shaping layer 8 is provided between the release layer 2 and the front adhesive layer 3. The metal shaping layer 8 is used to prevent the deformation of the pattern printing layer 6 after being transferred to other materials.

[0041] Among them, the adsorbent layer a-1 uses a silica gel adsorbent, or the rear protective layer 5 can also use an activated carbon adsorbent. The adiabatic low specific heat capacity layer a-3 uses low-density polyethylene, polymethyl methacrylate, or polyethylene terephthalate.

[0042] The pattern printing layer 6 includes a pattern carrier layer 6-1 and a pattern layer 6-2. The pattern carrier layer 6-1 has corresponding notches for the pattern layer 6-2. The pattern layer 6-2 is embedded and printed inside the pattern carrier layer 6-1, so that the pattern printing layer 6 adopts an embedded printing structure.

[0043] A production process for an environmentally friendly transfer film, combining Figure 3 as shown, includes the following production steps:

[0044] S1. Use a laminating machine to laminate the carrier 1 and the release layer 2, and coat a layer of pre - adhesive layer 3 on the release layer 2;

[0045] S2. Laminate the adsorbent layer a - 1, the isolation layer a - 2 and the adiabatic low - specific - heat - capacity layer a - 3 on the pre - adhesive layer 3 in sequence to form the front protective layer 4;

[0046] S3. Synchronously produce the pattern printing layer 6 on another set of equipment. First, use 3D printing to laser engrave the pattern carrier layer 6 - 1 to form pattern notches, and then use an ink - jet device to spray different amounts of pigments into the pattern notches on the pattern carrier layer 6 - 1 to form the pattern layer 6 - 2, and wait for the pattern layer 6 - 2 to dry;

[0047] S4. Laminate the printed pattern printing layer 6 on the front protective layer 4 on the laminating machine;

[0048] S5. Add the rear protective layer 5 and the rear adhesive layer 7 on the pattern printing layer 6;

[0049] S6. After all lamination is completed, use a winding device to wind and store the transfer film.

[0050] The adsorbent layer a - 1 uses a silica gel adsorbent, or the rear protective layer 5 can also use an activated carbon adsorbent, and the adiabatic low - specific - heat - capacity layer a - 2 uses low - density polyethylene, polymethyl methacrylate or polyethylene terephthalate. If the pattern layer 6 - 2 is embedded in the pattern carrier layer 6 - 1, the pigments are not easy to spread, not easy to deform, and will not be scratched. The 3D printing process is designed by a 3D printer.

[0051] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above - mentioned embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An environmentally friendly transfer film, comprising a carrier (1), and a release layer (2), a front adhesive layer (3), a front protective layer (4), a pattern printing layer (6), a rear protective layer (5) and a rear adhesive layer (7) sequentially attached to the carrier (1). Characterized in that: The front protective layer (4) and the rear protective layer (5) have the same structural materials; the front protective layer (4) includes an adsorbent layer (a-1), an isolation layer (a-2) and an adiabatic low specific heat capacity layer (a-3). The adsorbent layer (a-1) is used to adsorb gas when the pattern printing layer (6) emits ink stains. The isolation layer (a-2) is used to isolate water vapor and oxygen. The adiabatic low specific heat capacity layer (a-3) is used to insulate the generated high temperature during transfer, so as to prevent the pattern printing layer (6) from contacting a high heat environment; a metal shaping layer (8) is arranged between the release layer (2) and the front adhesive layer (3), and the metal shaping layer (8) is used to prevent the pattern printing layer (6) from deforming after being transferred to other materials; wherein the adiabatic low specific heat capacity layer (a-3) is made of low density polyethylene, polymethyl methacrylate or polyethylene terephthalate.

2. An environmentally friendly transfer film according to claim 1, Characterized in that: The adsorbent layer (a-1) is made of silica gel adsorbent, and the rear protective layer (5) is made of activated carbon adsorbent.

3. An environmentally friendly transfer film according to claim 1, Characterized in that: The pattern printing layer (6) includes a pattern carrier layer (6-1) and a pattern layer (6-2). The pattern carrier layer (6-1) has corresponding notches for the pattern layer (6-2). The pattern layer (6-2) is embedded and printed inside the pattern carrier layer (6-1), so that the pattern printing layer (6) adopts an embedded printing structure.

4. A production process of an environmentally friendly transfer film, Characterized in that, It includes the following production steps: S1. Use a laminating machine to laminate the carrier (1) and the release layer (2), and coat a front adhesive layer (3) on the release layer (2); S2. Sequentially laminate the adsorbent layer (a-1), the isolation layer (a-2) and the adiabatic low specific heat capacity layer (a-3) on the front adhesive layer (3) to form the front protective layer (4); wherein the adsorbent layer (a-1) is made of silica gel adsorbent, and the adiabatic low specific heat capacity layer (a-3) is made of low density polyethylene, polymethyl methacrylate or polyethylene terephthalate; S3. Synchronously produce the pattern printing layer (6) on another set of equipment. First, use 3D printing to laser engrave the pattern carrier layer (6-1) to form pattern notches, and then use an inkjet device to spray different amounts of pigments into the pattern notches on the pattern carrier layer (6-1) to form the pattern layer (6-2), and wait for the pattern layer (6-2) to dry; S4. Laminate the printed pattern printing layer (6) on the front protective layer (4) on a laminating machine; S5. Add a rear protective layer (5) and a rear adhesive layer (7) to the pattern printing layer (6); wherein the rear protective layer (5) is made of activated carbon adsorbent; S6. After all lamination is completed, use a winding device to wind and store the transfer film.

5. The production process of an environmentally friendly transfer film according to claim 4, characterized in that: The pattern layer (6-2) is embedded in the pattern carrier layer (6-1), so that the pigment is not easy to diffuse, not easy to deform, and will not be scratched at the same time.

6. The production process of an environmentally friendly transfer film according to claim 4, characterized in that: The 3D printing process is designed by a 3D printer.

Images