TWI737442B - Thermal transfer film device - Google Patents

Abstract

The invention discloses a thermal transfer film device including a weather-resistant pattern layer. The composition of the weather-resistant pattern layer includes, in parts by weight, 1.0 to 2.0 parts by weight of an acrylic resin, 2.0 to 4.0 parts by weight of a polyvinylidene fluoride resin or a fluorovinyl resin copolymer, 1.0 to 5.0 parts by weight of an inorganic pigments, and 0.1 to 1.0 parts by weight of an additives. The thickness of the weather-resistant pattern layer is equal to or greater than 3 μm. The inorganic pigments exhibits a pattern. The thermal transfer film device of the invention is attached to a workpiece, and the weather-resistant pattern layer is baked and then cured at a baking temperature. The abrasion coefficient of the cured weather-resistant pattern layer is equal to or greater than 40.

Description

Thermal transfer film element

The present invention relates to a thermal transfer film element, and more particularly to a thermal transfer film element attached to a workpiece and having a weather-resistant graphic layer having excellent wear resistance and weather resistance after curing.

Building materials and other workpieces are generally decorated with a coating process. Take the aluminum plate used for building exterior walls as an example. The outer surface of the aluminum plate is cleaned and the aluminum plate is immersed in a chromic acid solution to cover the outer surface of the aluminum plate in sequence. Formation of chromate film and other pre-treatment processes. Some building materials that need to be modified on the surface, such as calcium silicate boards, bakelite boards, etc., will first clean the outer surfaces of these building materials and other workpieces in order, and then coat the outer surfaces of these building materials and other workpieces, and Pre-treatment procedures such as drying the next layer. All building materials and other workpieces are then coated with a primer coating, followed by a drying process, and then a graphic layer (for example, a stone-like layer) is coated on the primer coating, then a drying process is performed, and then a transparent protection is applied Layer on the graphics layer, and finally perform the drying process. Obviously, the prior art of the coating process for decorative building materials and other workpieces is quite complicated and labor intensive.

Thermal transfer film is a mature technology. The prior art discloses the use of transfer film to decorate the outer surface of a workpiece such as building materials, which only covers the release layer on the base layer, and then the graphics layer is covered on the release layer. Regarding the use of the prior art thermal transfer film, the adhesive layer is first coated on the outer surface of the building materials and other workpieces. The prior art thermal transfer film is attached to the adhesive layer with a graphic layer, and then the base layer is followed by the release layer. At the same time, it is removed from the outer surface of the building material and other workpieces, and finally the graphic layer is dried and cured. Although the thermal transfer film of the prior art also takes into account the requirements for weather resistance of building materials and other workpieces, its graphic layer adopts fluorine resin. However, the quantitative data on the weather resistance properties of the prior art thermal transfer film transferred to work pieces such as building materials are lacking, and its wear resistance properties are also worrying. In fact, there is no commercial thermal transfer film element for decorative building materials and other workpieces on the market.

In addition, as stated above, using the thermal transfer film of the prior art, only the adhesive layer is coated on the outer surface of the workpiece such as building materials, and the primer coating is not coated. However, the prior art thermal transfer film only relies on work pieces such as decorative building materials with a graphic layer, and does not take into account the influence of the color of the outer surface of the work piece such as building materials. For example, the outer surface of the aluminum plate forms a chromate film. Obviously, the performance color contrast of the heat transfer film of the prior art is limited.

In addition, in practice, the vast majority of manufacturers of decorative building materials and other workpieces are not manufacturers of thermal transfer film. Different manufacturers of decorative building materials and other workpieces will execute different procedures. For example, some manufacturers may only execute the coating procedure of the subsequent layer. Some manufacturers can perform the coating process of the adhesive layer and the coating process of the primer coating, some manufacturers can perform the coating process of the adhesive layer and the coating process of the transparent protective layer, and some manufacturers can perform the coating process of the adhesive layer, The coating procedure of the primer coating and the coating procedure of the transparent protective layer. At present, the thermal transfer film elements required by different manufacturers have not been developed.

Therefore, one of the technical problems to be solved by the present invention is to provide a thermal transfer film element that is attached to a workpiece and has a weather-resistant graphic layer having excellent wear resistance and weather resistance after curing. In addition, the thermal transfer film elements according to different preferred embodiments of the present invention can meet the needs of different manufacturers of decorative building materials and other workpieces.

The thermal transfer film element according to the first preferred embodiment of the present invention is used to decorate the outer surface of a workpiece. The thermal transfer film element according to the first preferred embodiment of the present invention includes a primer coating, a weather-resistant graphic layer, a transparent protective layer, a release layer, and a base layer. The primer coating contains 1.0 to 2.0 parts by weight of the first acrylic resin (acrylic resin), 1.0 to 2.0 parts by weight of the first polyvinylidene difluoride (PVDF) or first Fluoroethylene vinylether (FEVE), 1.0 to 3.0 parts by weight of the first inorganic colorant, and 0.1 to 0.5 parts by weight of the first additive. The first thickness of the primer coating is equal to or greater than 20 μm. The weather-resistant graphic layer is covered on the primer coating. The weather-resistant graphic layer contains 1.0 to 2.0 parts by weight of the second acrylic resin, 2.0 to 4.0 parts by weight of the second polyvinylidene fluoride resin or the second fluoroolefin-vinyl ether copolymer, and 1.0 to 2.0 parts by weight. 5.0 parts by weight of the second inorganic colorant and 0.1 to 1.0 parts by weight of the second additive. The second thickness of the weather-resistant pattern layer is equal to or greater than 3 μm. The second inorganic color material presents a pattern. The transparent protective layer is coated on the weather-resistant pattern layer, and is formed of a third polyvinylidene fluoride resin or a third fluoroolefin-vinyl ether copolymer. The third thickness of the transparent protective layer is equal to or greater than 20 μm. The release layer is covered on the transparent protective layer. The base layer is bonded to the release layer. The outer surface of the workpiece is first selectively coated with an adhesive layer. The thermal transfer film element is attached to the outer surface of the workpiece with a primer coating. When the release layer is separated from the transparent protective layer, the base layer is simultaneously removed from the outer surface of the workpiece along with the release layer. The primer coating, weather-resistant graphic layer and transparent protective layer are dried at the drying temperature and then cured. When the thermal transfer film element is formed by the first polyvinylidene fluoride resin, the second polyvinylidene fluoride resin and the third polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C . When the thermal transfer film element is formed by the first fluoroolefin-vinyl ether copolymer, the second fluoroolefin-vinyl ether copolymer and the third fluoroolefin-vinyl ether copolymer, the temperature range of the drying temperature It is 160°C to 180°C. In particular, the abrasion coefficient of the transparent protective layer and the weather-resistant graphic layer is equal to or greater than 40.

In a specific embodiment, following the ASTM G154 test standard and according to the first preferred embodiment of the present invention,  outer surface coating, bonding adhesive layer, primer coating, weather-resistant graphic layer and transparent protective layer of the workpiece After 4000 hours of exposure, the color change (ΔE) of the weather-resistant graphic layer and the transparent protective layer is equal to or less than 5, and the gloss retention of the weather-resistant graphic layer and the transparent protective layer is equal to or greater than 50%.

The thermal transfer film element according to the second preferred embodiment of the present invention is used to decorate the outer surface of a workpiece. The thermal transfer film element according to the second preferred embodiment of the present invention includes a weather-resistant graphic layer, a transparent protective layer, a release layer and a base layer. The weather-resistant graphic layer contains 1.0 to 2.0 parts by weight of the first acrylic resin, 2.0 to 4.0 parts by weight of the first polyvinylidene fluoride resin (PVDF) or the first fluoroolefin-vinyl ether copolymer. (FEVE), 1.0 to 5.0 parts by weight of inorganic pigments and 0.1 to 1.0 parts by weight of additives. The first thickness of the weather-resistant pattern layer is equal to or greater than 3 μm. The inorganic colorant presents a pattern. The transparent protective layer is coated on the weather-resistant pattern layer and is formed of a second polyvinylidene fluoride resin or a second fluoroolefin-vinyl ether copolymer. The second thickness of the transparent protective layer is equal to or greater than 20 μm. The release layer is covered on the transparent protective layer. The base layer is bonded to the release layer. The outer surface of the workpiece is first selectively coated with an adhesive layer and coated with a primer coating. The thermal transfer film element is attached to the primer coating with a weather-resistant graphic layer. When the release layer is separated from the transparent protective layer, the base layer is simultaneously removed from the outer surface of the workpiece along with the release layer. The weather-resistant graphic layer and the transparent protective layer are dried and cured at a drying temperature. When the thermal transfer film element is formed of the first polyvinylidene fluoride resin and the second polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C. When the thermal transfer film element is formed of the first fluoroolefin-vinyl ether copolymer and the second fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160°C to 180°C. In particular, the abrasion coefficient of the transparent protective layer and the weather-resistant graphic layer is equal to or greater than 40.

In a specific embodiment, following the ASTM G154 test standard and according to the second preferred embodiment of the present invention,  outer surface coating, bonding adhesive layer, primer coating, weathering pattern layer and transparent protective layer After 4000 hours of exposure, the color change (ΔE) of the weather-resistant graphic layer and the transparent protective layer is equal to or less than 5, and the gloss retention of the weather-resistant graphic layer and the transparent protective layer is equal to or greater than 50%.

The thermal transfer film element according to the third preferred embodiment of the present invention is used to decorate the outer surface of a workpiece. The thermal transfer film element according to the third preferred embodiment of the present invention includes a primer coating, a weather-resistant graphic layer, a release layer and a base layer. The primer coating contains 1.0 to 2.0 parts by weight of the first acrylic resin, 1.0 to 2.0 parts by weight of the first polyvinylidene fluoride resin (PVDF) or the first fluoroolefin-vinyl ether copolymer. (FEVE), 1.0 to 3.0 parts by weight of the first inorganic colorant, and 0.1 to 0.5 parts by weight of the first additive. The first thickness of the primer coating is equal to or greater than 20 μm. The weather-resistant graphic layer is covered on the primer coating. The weather-resistant graphic layer contains 1.0 to 2.0 parts by weight of the second acrylic resin, 2.0 to 4.0 parts by weight of the second polyvinylidene fluoride resin or the second fluoroolefin-vinyl ether copolymer, and 1.0 to 2.0 parts by weight. 5.0 parts by weight of the second inorganic colorant and 0.1 to 1.0 parts by weight of the second additive. The second thickness of the weather-resistant pattern layer is equal to or greater than 3 μm. The second inorganic color material presents a pattern. The release layer is covered on the weather-resistant graphic layer. The base layer is bonded to the release layer. The outer surface of the workpiece is first selectively coated with an adhesive layer. The thermal transfer film element is attached to the outer surface of the workpiece with a primer coating. When the release layer is separated from the transparent protective layer, the base layer is simultaneously removed from the outer surface of the workpiece along with the release layer. The primer coating and the weather-resistant graphic layer are dried at the drying temperature and then cured. When the thermal transfer film element is formed of the first polyvinylidene fluoride resin and the second polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C. When the thermal transfer film element is formed of the first fluoroolefin-vinyl ether copolymer and the second fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160°C to 180°C. In particular, the wear coefficient of the weather-resistant pattern layer is equal to or greater than 40.

In a specific embodiment, following the ASTM G154 test standard and according to the third preferred embodiment of the present invention,  workpieces with outer surface coating, bonding adhesive layer, primer coating and weathering pattern layer are exposed to 4000 hours The color change (ΔE) of the weather-resistant graphic layer and the transparent protective layer is equal to or less than 5, and the gloss retention of the weather-resistant graphic layer is equal to or greater than 50%.

The thermal transfer film element according to the fourth preferred embodiment of the present invention is used to decorate the outer surface of a workpiece. The thermal transfer film element according to the fourth preferred embodiment of the present invention includes a weather-resistant pattern layer, a release layer and a base layer. The weather-resistant graphic layer contains 1.0 to 2.0 parts by weight of acrylic resin, 2.0 to 4.0 parts by weight of polyvinylidene fluoride resin (PVDF) or fluoroolefin-vinyl ether copolymer (FEVE), 1.0 to 2.0 parts by weight, 5.0 parts by weight of inorganic pigments and 0.1 to 1.0 parts by weight of additives. The thickness of the weather-resistant pattern layer is equal to or greater than 3 μm. The inorganic colorant presents a pattern. The release layer is covered on the weather-resistant graphic layer. The base layer is bonded to the release layer. The outer surface of the workpiece is first selectively coated with an adhesive layer and coated with a primer coating. The thermal transfer film element is attached to the primer coating with a weather-resistant graphic layer. When the release layer is separated from the transparent protective layer, the base layer is simultaneously removed from the outer surface of the workpiece along with the release layer. The weather-resistant graphic layer is dried and cured at a drying temperature. When the thermal transfer film element is formed of polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C. When the thermal transfer film element is formed of a fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160°C to 180°C. In particular, the wear coefficient of the weather-resistant pattern layer is equal to or greater than 40.

In a specific embodiment, following the ASTM G154 test standard and according to the fourth preferred embodiment of the present invention,  workpieces with outer surface coating, bonding adhesive layer, primer coating and weathering pattern layer are exposed to 4000 hours , The color change (ΔE) of the weather-resistant graphic layer is equal to or less than 5, and the gloss retention of the weather-resistant graphic layer is equal to or greater than 50%.

Different from the prior art, the thermal transfer film element according to the present invention is used to transfer to the workpiece and the cured weather-resistant graphic layer has excellent abrasion resistance and weather-resistant thermal transfer film elements. In addition, the thermal transfer film elements according to different preferred embodiments of the present invention can meet the needs of different manufacturers of decorative building materials and other workpieces.

The advantages and spirit of the present invention can be further understood from the following detailed description of the invention and the accompanying drawings.

Please refer to Figure 1, Figure 2 and Figure 3. Fig. 1 is a partial cross-sectional view schematically showing a thermal transfer film element 1 and a work piece 2 attached thereto according to a first preferred embodiment of the present invention. 2 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element 1 according to the first preferred embodiment of the present invention from the workpiece 2 to which it is attached. 3 is a partial cross-sectional view schematically showing the structure of the thermal transfer film element 1 according to the first preferred embodiment of the present invention in which part of the elements are transferred to the workpiece 2 to which it is attached and cured . The work 2 may be building materials, but is not limited to this. The building materials can be metal plates such as steel plates and aluminum plates for building exterior walls, steel or metal profiles, organic material plates or inorganic material plates, and the like. The organic material board must be a board made of materials with a temperature of more than 160 degrees, for example, bakelite, glass fiber board, carbon fiber board, etc. The inorganic material board can be cement board or calcium silicate board.

As shown in FIG. 1, the thermal transfer film element 1 according to the first preferred embodiment of the present invention is used to decorate the outer surface 20 of the workpiece 2. The thermal transfer film element 1 according to the first preferred embodiment of the present invention includes a primer coating 10, a weather-resistant graphic layer 12, a transparent protective layer 14, a release layer 16 and a base layer 18.

The primer coating layer 10 contains 1.0 to 2.0 parts by weight of the first acrylic resin, 1.0 to 2.0 parts by weight of the first polyvinylidene fluoride resin (PVDF) or the first fluoroolefin-vinyl ether. Copolymer (FEVE), 1.0 to 3.0 parts by weight of the first inorganic colorant, and 0.1 to 0.5 parts by weight of the first additive. The first thickness of the primer coating 10 is equal to or greater than 20 μm. In a specific embodiment, the first additive may include a hardening agent, an adhesion agent, or a leveling agent. The above-mentioned components of the primer coating layer 10 can be diluted with a diluent, which volatilizes after coating the primer coating layer 10 to form a film of the coated primer coating layer 10. The diluent may be benzene, ketone, or a mixture of benzene and ketone, and the like.

The weather-resistant graphic layer 12 is coated on the primer coating 10. The weather-resistant graphic layer 12 contains 1.0 to 2.0 parts by weight of the second acrylic resin, 2.0 to 4.0 parts by weight of the second polyvinylidene fluoride resin or second fluoroolefin-vinyl ether copolymer, and 1.0 parts by weight. To 5.0 parts by weight of the second inorganic colorant and 0.1 to 1.0 parts by weight of the second additive. The second thickness of the weather-resistant pattern layer 12 is equal to or greater than 3 μm. The second inorganic color material presents a pattern. The primer coating 10 containing the first inorganic colorant can improve the color performance and color contrast of the graphics of the weather-resistant graphics layer 12. In a specific embodiment, the second additive may include a hardening agent, an adhesion agent, or a leveling agent. The components of the weather-resistant graphic layer 12 can be diluted with a diluent, and the diluent volatilizes after the weather-resistant graphic layer 12 to form a film of the coated weather-resistant graphic layer 12. The diluent may be benzene, ketone, or a mixture of benzene and ketone, and the like.

The transparent protective layer 14 is coated on the weather-resistant pattern layer 12, and is formed of a third polyvinylidene fluoride resin or a third fluoroolefin-vinyl ether copolymer. The third thickness of the transparent protective layer 14 is equal to or greater than 20 μm. As shown in FIG. 1, the upper surface 140 of the transparent protective layer 14 may have uneven textures to increase the decorative effect of the thermal transfer film element 1 on the outer surface 20 of the workpiece 2 according to the first preferred embodiment of the present invention. Concave-convex patterns may also be formed on the top surface 120 of the weather-resistant pattern layer 12.

The release layer 16 is covered on the transparent protective layer 14. In a specific embodiment, the release layer 16 may be formed of silicone, fluorine resin, melamine, cellulose acetate, acrylic resin, or other resins.

The base layer 18 is bonded to the release layer 16. In a specific embodiment, the base layer 18 may be made of polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) resin, polyimide (PI) resin, polyolefin ( PO) resin, acrylonitrile-butadiene-styrene copolymer (ABS) resin, polypropylene (PP), and other resins.

Also as shown in FIG. 1, using the thermal transfer film element 1 according to the first preferred embodiment of the present invention, the outer surface 20 of the workpiece 2 is first selectively coated with an adhesive layer 22. For example, the workpiece 2 is an aluminum plate, and its outer surface 20 does not need to be coated with the adhesive layer 22. For workpieces 2 such as building materials whose surfaces need to be modified, for example, calcium silicate boards, bakelite boards, etc., the outer surface 20 of such workpieces 2 must be coated with an adhesive layer 22 first. The thermal transfer film element 1 is attached to the outer surface 20 of the workpiece 2 with a primer coating 10. In a specific embodiment, the adhesive layer 22 may be formed of resin such as fluorine resin. The exemplary examples depicted in FIGS. 1, 2 and 3 are examples in which the outer surface 20 of the workpiece 2 is coated with the adhesive layer 22 in advance.

As shown in FIG. 2, when the release layer 16 is separated from the transparent protective layer 14, the base layer 18 is simultaneously removed from the outer surface 20 of the workpiece 2 along with the release layer 16.

As shown in FIG. 3, the primer coating 10, the weather-resistant graphic layer 12, and the transparent protective layer 14 are dried and cured at a drying temperature. When the thermal transfer film element 1 is formed of the first polyvinylidene fluoride resin, the second polyvinylidene fluoride resin, and the third polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250 ℃. When the thermal transfer film element 1 is formed by the first fluoroolefin-vinyl ether copolymer, the second fluoroolefin-vinyl ether copolymer, and the third fluoroolefin-vinyl ether copolymer, the drying temperature is The range is from 160°C to 180°C. In particular, the abrasion coefficient of the transparent protective layer 14 and the weather-resistant graphic layer 12 is equal to or greater than 40.

In a specific embodiment, following the ASTM G154 test standard and in accordance with the first preferred embodiment of the present invention,  outer surface 20 is coated, laminated with adhesive layer, primer coating 10, weather-resistant graphic layer 12 and transparent protective layer The workpiece 2 of 14 is placed in the QUV accelerated weathering tester. After 4000 hours of exposure, the color change (ΔE) of the weathering patterned layer 12 and the transparent protective layer 14 is equal to or less than 5, and the weathering patterned layer 12 and the transparent protective layer The gloss retention of 14 is equal to or greater than 50%.

Please refer to Figure 4, Figure 5 and Figure 6. FIG. 4 is a partial cross-sectional view schematically showing the thermal transfer film element 3 and the attached workpiece 4 according to the second preferred embodiment of the present invention. 5 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element 3 from the work piece 4 to which it is attached according to the second preferred embodiment of the present invention. 6 is a partial cross-sectional view schematically showing the structure of the thermal transfer film element 3 according to the second preferred embodiment of the present invention in which part of the elements are transferred to the workpiece 4 to which it is attached and cured . The workpiece 4 may be building materials, but is not limited to this. The building materials can be metal plates such as steel plates and aluminum plates for building exterior walls, steel or metal profiles, organic material plates or inorganic material plates, and the like. The organic material board must be a board made of materials with a temperature of more than 160 degrees, for example, bakelite, glass fiber board, carbon fiber board, etc. The inorganic material board can be cement board or calcium silicate board.

As shown in FIG. 3, the thermal transfer film element 3 according to the second preferred embodiment of the present invention is used to decorate the outer surface 40 of the workpiece 4. The thermal transfer film element 3 according to the second preferred embodiment of the present invention includes a weather-resistant graphic layer 32, a transparent protective layer 34, a release layer 36, and a base layer 38.

The weather-resistant graphic layer 32 includes 1.0 to 2.0 parts by weight of the first acrylic resin, 2.0 to 4.0 parts by weight of the first polyvinylidene fluoride resin (PVDF) or the first fluoroolefin-vinyl ether copolymer. (FEVE), 1.0 to 5.0 parts by weight of inorganic pigments and 0.1 to 1.0 parts by weight of additives. The first thickness of the weather-resistant pattern layer 32 is equal to or greater than 3 μm. The inorganic colorant presents a pattern. In a specific embodiment, the additives may include hardeners, adhesion agents, or leveling agents. The components of the weather-resistant graphic layer 32 can be diluted with a diluent, and the diluent volatilizes after the weather-resistant graphic layer 32 to form a film of the coated weather-resistant graphic layer 32. The diluent may be benzene, ketone, or a mixture of benzene and ketone, and the like.

The transparent protective layer 34 is coated on the weather-resistant pattern layer 32, and is formed of a second polyvinylidene fluoride resin or a second fluoroolefin-vinyl ether copolymer. The second thickness of the transparent protective layer 34 is equal to or greater than 20 μm. As shown in FIG. 1, the upper surface 340 of the transparent protective layer 34 may have uneven textures to increase the decorative effect of the thermal transfer film element 3 on the outer surface 40 of the workpiece 4 according to the second preferred embodiment of the present invention. Concave-convex patterns may also be formed on the top surface 320 of the weather-resistant pattern layer 32.

The release layer 36 is covered on the transparent protective layer 34. In a specific embodiment, the release layer 36 may be formed of silicone, fluorine resin, melamine, cellulose acetate, acrylic resin, or other resins.

The base layer 38 is bonded to the release layer 36. In a specific embodiment, the base layer 38 may be made of polyethylene terephthalate resin, polyethylene naphthalate resin, polyimide resin, polyolefin resin, acrylonitrile-butadiene-benzene. Ethylene copolymer resin, polypropylene, and other resins are formed.

Also as shown in FIG. 4, using the thermal transfer film element 3 according to the second preferred embodiment of the present invention, the outer surface 40 of the workpiece 4 is first selectively coated with an adhesive layer 42 and coated with a primer coating 44. For example, the workpiece 4 is an aluminum plate, and its outer surface 40 does not need to be coated with the adhesive layer 42. For work pieces 4 such as building materials whose surfaces need to be modified, for example, calcium silicate boards, bakelite boards, etc., the outer surface 40 of such work pieces 4 must be coated with an adhesive layer 42 first. If the outer surface 40 of the workpiece 4 is coated with the adhesive layer 42 first, the primer coating 44 is coated on the adhesive layer 42. The thermal transfer film element 3 is attached to the primer coating 44 with a weather-resistant graphic layer 32. In a specific embodiment, the adhesive layer 42 may be formed of resin such as fluorine resin. The primer coating layer 44 may be formed of resin such as fluorine resin, and contains an inorganic colorant. The primer coating 44 containing inorganic colorants can improve the color performance and color contrast of the graphics of the weather-resistant graphics layer 32. The examples shown in FIGS. 4, 5 and 6 are examples in which the outer surface 40 of the workpiece 4 is coated with the adhesive layer 42 and the primer coating 44 in advance.

As shown in FIG. 5, when the release layer 36 is separated from the transparent protective layer 34, the base layer 38 is simultaneously removed from the outer surface 40 of the workpiece 4 along with the release layer 36.

As shown in FIG. 6, the weather-resistant graphic layer 32 and the transparent protective layer 34 are dried and cured at a drying temperature. When the thermal transfer film element 3 is formed of the first polyvinylidene fluoride resin and the second polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C. When the thermal transfer film element 3 is formed of the first fluoroolefin-vinyl ether copolymer and the second fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160°C to 180°C. In particular, the abrasion coefficient of the transparent protective layer 34 and the weather-resistant pattern layer 32 is equal to or greater than 40.

In a specific embodiment, following the ASTM G154 test standard and according to the second preferred embodiment of the present invention,  outer surface 40 is coated, bonded with adhesive layer 42, primer coating 44, weather-resistant graphic layer 32 and transparent protection The workpiece 4 of the layer 34 is placed in the QUV accelerated weathering tester. After 4000 hours of exposure, the color change (ΔE) of the weathering pattern layer 32 and the transparent protective layer 34 is equal to or less than 5, and the weathering pattern layer 32 and the transparent protective layer The gloss retention of the layer 34 is equal to or greater than 50%.

Please refer to Figure 7, Figure 8, and Figure 9. FIG. 7 schematically illustrates a thermal transfer film element 5 and the attached workpiece 6 according to the third preferred embodiment of the present invention in a partial cross-sectional view. 8 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element 5 according to the third preferred embodiment of the present invention from the work piece 6 to which it is attached. 9 is a partial cross-sectional view schematically illustrates the structure of the thermal transfer film element 5 according to the third preferred embodiment of the present invention, part of which is transferred to the workpiece 6 to which it is attached and cured . The work 6 may be building materials, but is not limited to this. The building materials can be metal plates such as steel plates and aluminum plates for building exterior walls, steel or metal profiles, organic material plates or inorganic material plates, and the like. The organic material board must be a board made of materials with a temperature of more than 160 degrees, for example, bakelite, glass fiber board, carbon fiber board, etc. The inorganic material board can be cement board or calcium silicate board.

As shown in FIG. 7, the thermal transfer film element 5 according to the third preferred embodiment of the present invention is used to decorate the outer surface 60 of the workpiece 6. The thermal transfer film element 5 according to the third preferred embodiment of the present invention includes a primer coating 50, a weather-resistant graphic layer 52, a release layer 56 and a base layer 58.

The primer coating layer 50 contains 1.0 to 2.0 parts by weight of the first acrylic resin, 1.0 to 2.0 parts by weight of the first polyvinylidene fluoride resin (PVDF) or the first fluoroolefin-vinyl ether. Copolymer (FEVE), 1.0 to 3.0 parts by weight of the first inorganic colorant, and 0.1 to 0.5 parts by weight of the first additive. The first thickness of the primer coating layer 50 is equal to or greater than 20 μm. The weather-resistant graphic layer 52 is coated on the primer coating 50. In a specific embodiment, the first additive may include a hardening agent, an adhesion agent, or a leveling agent. The components of the primer coating 50 can be diluted with a diluent, and the diluent volatilizes after coating the primer coating 50 to form a film of the coated primer coating 50. The diluent may be benzene, ketone, or a mixture of benzene and ketone, and the like.

The weather-resistant graphic layer 52 includes 1.0 to 2.0 parts by weight of the second acrylic resin, 2.0 to 4.0 parts by weight of the second polyvinylidene fluoride resin or second fluoroolefin-vinyl ether copolymer, and 1.0 parts by weight. To 5.0 parts by weight of the second inorganic colorant and 0.1 to 1.0 parts by weight of the second additive. The second thickness of the weather-resistant pattern layer 52 is equal to or greater than 3 μm. The second inorganic color material presents a pattern. The primer coating 50 containing the first inorganic colorant can improve the color performance and color contrast of the graphics of the weather-resistant graphic layer 52. In a specific embodiment, the second additive may include a hardening agent, an adhesion agent, or a leveling agent. The components of the weather-resistant graphic layer 52 can be diluted with a diluent, and the diluent volatilizes after the weather-resistant graphic layer 52 to form a film of the coated weather-resistant graphic layer 52. The diluent may be benzene, ketone, or a mixture of benzene and ketone, and the like.

The release layer 56 is coated on the weather-resistant pattern layer 52. In a specific embodiment, the release layer 56 may be formed of silicone, fluorine resin, melamine, cellulose acetate, acrylic resin, or other resins.

The base layer 58 is bonded to the release layer 56. In a specific embodiment, the base layer 58 may be made of polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) resin, polyimide (PI) resin, polyolefin ( PO) resin, acrylonitrile-butadiene-styrene copolymer (ABS) resin, polypropylene (PP), and other resins.

Also as shown in FIG. 7, using the thermal transfer film element 5 according to the third preferred embodiment of the present invention, the outer surface 60 of the workpiece 6 is first selectively coated with an adhesive layer 62. For example, the workpiece 6 is an aluminum plate, and its outer surface 60 does not need to be coated with the adhesive layer 62. Workpieces 6 such as building materials whose surfaces need to be modified, such as calcium silicate boards, bakelite boards, etc. The outer surface 60 of such work pieces 6 must be coated with an adhesive layer 62 first. The thermal transfer film element 5 is attached to the outer surface 60 of the workpiece 6 with a primer coating 50. In a specific embodiment, the adhesive layer 62 may be formed of resin such as fluorine resin. The examples shown in FIGS. 7, 8 and 9 are examples in which the outer surface 60 of the workpiece 6 is coated with the adhesive layer 62 in advance.

As shown in FIG. 8, when the release layer 56 is separated from the transparent protective layer, the base layer 58 is simultaneously removed from the outer surface 60 of the workpiece 6 along with the release layer 56.

As shown in FIG. 9, the primer coating 50 and the weather-resistant graphic layer 52 are dried and cured at a drying temperature. When the thermal transfer film element 5 is formed of the first polyvinylidene fluoride resin and the second polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C. When the thermal transfer film element 5 is formed of the first fluoroolefin-vinyl ether copolymer and the second fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160°C to 180°C. In particular, the wear coefficient of the weather-resistant pattern layer 52 is equal to or greater than 40. In practical applications, further, the transparent protective layer 64 is coated on the weather-resistant graphic layer 52. In a specific embodiment, the transparent protective layer 64 may be formed of resin such as fluororesin. As shown in FIG. 7, the top surface 520 of the weather-resistant graphic layer 52 may have uneven textures to increase the decorative effect of the thermal transfer film element 5 on the outer surface 60 of the workpiece 6 according to the third preferred embodiment of the present invention. Concavo-convex lines can also be formed on the upper surface 640 of the transparent protective layer 64.

In a specific embodiment, according to the ASTM G154 test standard and according to the third preferred embodiment of the present invention, the outer surface 60 is coated with, the bonding layer 62, the primer coating 50 and the weather resistant pattern layer 52 are coated on the workpiece 6 Placed in a QUV accelerated weathering tester, after 4000 hours of exposure, the color change (ΔE) of the weathering graphic layer 52 and the transparent protective layer is equal to or less than 5, and the gloss retention of the weathering graphic layer 52 is equal to or greater than 50 %.

Please refer to Figure 10, Figure 11 and Figure 12. FIG. 10 schematically illustrates a thermal transfer film element 7 and a work piece 8 attached thereto according to a fourth preferred embodiment of the present invention in a partial cross-sectional view. 11 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element 7 according to the fourth preferred embodiment of the present invention from the workpiece 8 to which it is attached. 12 is a partial cross-sectional view schematically illustrates the structure of the thermal transfer film element 7 according to the fourth preferred embodiment of the present invention in which part of the elements are transferred to the workpiece 8 to which it is attached and cured . The workpiece 8 may be building materials, but is not limited to this. The building materials can be metal plates such as steel plates and aluminum plates for building exterior walls, steel or metal profiles, organic material plates or inorganic material plates, and the like. The organic material board must be a board made of materials with a temperature of more than 160 degrees, for example, bakelite, glass fiber board, carbon fiber board, etc. The inorganic material board can be cement board or calcium silicate board.

As shown in FIG. 10, the thermal transfer film element 7 according to the fourth preferred embodiment of the present invention is used to decorate the outer surface 80 of the workpiece 8. The thermal transfer film element 7 according to the fourth preferred embodiment of the present invention includes a weather-resistant pattern layer 72, a release layer 76 and a base layer 78.

The weather-resistant graphic layer 72 contains 1.0 to 2.0 parts by weight of acrylic resin, 2.0 to 4.0 parts by weight of polyvinylidene fluoride resin (PVDF) or fluoroolefin-vinyl ether copolymer (FEVE), 1.0 to 2.0 parts by weight. To 5.0 parts by weight of inorganic pigments and 0.1 to 1.0 parts by weight of additives. The thickness of the weather-resistant pattern layer 72 is equal to or greater than 3 μm. The inorganic colorant presents a pattern. In a specific embodiment, the additives may include hardeners, adhesion agents, or leveling agents. The components of the weather-resistant graphic layer 72 can be diluted with a diluent, and the diluent volatilizes after the weather-resistant graphic layer 72 to form a film of the coated weather-resistant graphic layer 72. The diluent may be benzene, ketone, or a mixture of benzene and ketone, and the like.

The release layer 76 is coated on the weather-resistant pattern layer 72. In a specific embodiment, the release layer 36 may be formed of silicone, fluorine resin, melamine, cellulose acetate, acrylic resin, or other resins.

The base layer 78 is bonded to the release layer 76. In a specific embodiment, the base layer 78 may be made of polyethylene terephthalate resin, polyethylene naphthalate resin, polyimide resin, polyolefin resin, acrylonitrile-butadiene-benzene. Ethylene copolymer resin, polypropylene, and other resins are formed.

Also as shown in FIG. 10, using the thermal transfer film element 7 according to the fourth preferred embodiment of the present invention, the outer surface 80 of the workpiece 8 is first selectively coated with an adhesive layer 82 and coated with a primer coating 84. For example, the workpiece 8 is an aluminum plate, and its outer surface 80 does not need to be coated with the adhesive layer 82. For workpieces 8 such as building materials whose surfaces need to be modified, for example, calcium silicate boards, bakelite boards, etc., the outer surface 80 of such workpieces 8 must be coated with an adhesive layer 82 first. If the outer surface 80 of the workpiece 8 is coated with the adhesive layer 82 first, the primer coating 84 is coated on the adhesive layer 82. The thermal transfer film element 7 is attached to the primer coating 84 with a weather-resistant graphic layer 72. In a specific embodiment, the adhesive layer 82 may be formed of resin such as fluorine resin. The primer coating layer 84 may be formed of a resin such as a fluorine resin, and contains an inorganic colorant. The primer coating 84 containing inorganic colorants can improve the color performance and color contrast of the graphics of the weather-resistant graphics layer 72. The examples shown in FIGS. 10, 11, and 12 are examples where the outer surface 80 of the workpiece 8 is first selectively coated with the adhesive layer 82 and the primer coating 84.

As shown in FIG. 11, when the release layer 76 is separated from the transparent protective layer, the base layer 78 is simultaneously removed from the outer surface 80 of the workpiece 8 along with the release layer 76.

As shown in FIG. 12, the weather-resistant graphic layer 72 is dried and then cured at a drying temperature. When the thermal transfer film element 7 is formed of polyvinylidene fluoride resin, the drying temperature ranges from 230°C to 250°C. When the thermal transfer film element 7 is formed of a fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160°C to 180°C. In particular, the wear coefficient of the weather-resistant pattern layer 72 is equal to or greater than 40. In practical applications, further, the transparent protective layer 86 is coated on the weather-resistant graphic layer 72. In a specific embodiment, the transparent protective layer 86 may be formed of resin such as fluorine resin. As shown in FIG. 10, the top surface 720 of the weather-resistant graphic layer 72 may have uneven textures to increase the decorative effect of the thermal transfer film element 7 on the outer surface 80 of the workpiece 8 according to the fourth preferred embodiment of the present invention. Concave-convex lines may also be formed on the upper surface 860 of the transparent protective layer 86.

In a specific embodiment, according to the ASTM G154 test standard and according to the fourth preferred embodiment of the present invention, the outer surface 80 is coated with the workpiece 8 with the adhesive layer 82, the primer coating 84 and the weather resistant pattern layer 72 Placed in a QUV accelerated weathering tester, after 4000 hours of exposure, the color change (ΔE) of the weathering graphic layer 72 is equal to or less than 5, and the gloss retention of the weathering graphic layer 72 is equal to or greater than 50%.

From the above detailed description of the present invention, it can be clearly understood that the thermal transfer film element according to the present invention is used to transfer to the workpiece and the cured weather-resistant graphic layer has excellent abrasion resistance and weather resistance. Transfer film elements. In addition, the thermal transfer film elements according to different preferred embodiments of the present invention can meet the needs of different manufacturers of decorative building materials and other workpieces.

Based on the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, rather than limiting the aspect of the present invention by the preferred embodiments disclosed above. On the contrary, its purpose is to cover various changes and equivalent arrangements within the scope of the patent for which the present invention is intended. Therefore, the aspect of the patent scope applied for by the present invention should be interpreted in the broadest way based on the above description, so as to cover all possible changes and equivalent arrangements.

1: Thermal transfer film element 10: Primer coating 12: Weather-resistant graphics layer 120: top surface 14: Transparent protective layer 140: upper surface 16: Release layer 18: basal layer 2: Workpiece 20: Outer surface 22: Next layer 3: Thermal transfer film element 32: Weather-resistant graphics layer 320: top surface 34: Transparent protective layer 340: upper surface 36: Release layer 38: basal layer 4: Workpiece 40: outer surface 42: Next layer 44: Primer coating 5: Thermal transfer film element 50: Primer coating 52: Weather-resistant graphics layer 520: top surface 56: Release layer 58: basal layer 6: Workpiece 60: outer surface 62: Next layer 64: Transparent protective layer 640: upper surface 7: Thermal transfer film element 72: Weather-resistant graphics layer 720: top surface 76: Release layer 78: basal layer 8: Workpiece 80: outer surface 82: Subsequent layer 84: Primer coating 86: Transparent protective layer 860: upper surface

Fig. 1 is a partial cross-sectional view schematically showing a thermal transfer film element and its attached workpiece according to a first preferred embodiment of the present invention. 2 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element according to the first preferred embodiment of the present invention from the workpiece to which it is attached. 3 is a partial cross-sectional view schematically showing the structure of the thermal transfer film element according to the first preferred embodiment of the present invention in which part of the elements are transferred to the workpiece to which it is attached and cured. FIG. 4 is a partial cross-sectional view schematically showing the thermal transfer film element and the attached workpiece according to the second preferred embodiment of the present invention. 5 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element according to the second preferred embodiment of the present invention from the workpiece to which it is attached. 6 is a schematic partial cross-sectional view showing the structure of the thermal transfer film element according to the second preferred embodiment of the present invention in which part of the elements are transferred to the workpiece to which it is attached and cured. FIG. 7 is a partial cross-sectional view schematically showing the thermal transfer film element and the attached workpiece according to the third preferred embodiment of the present invention. FIG. 8 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element according to the third preferred embodiment of the present invention from the workpiece to which it is attached. 9 is a partial cross-sectional view schematically showing the structure of the thermal transfer film element according to the third preferred embodiment of the present invention, in which part of the elements are transferred to the workpiece to which it is attached and cured. Fig. 10 schematically illustrates a thermal transfer film element and its attached workpiece according to a fourth preferred embodiment of the present invention in a partial cross-sectional view. 11 is a partial cross-sectional view schematically illustrating the process of removing some of the components of the thermal transfer film element according to the fourth preferred embodiment of the present invention from the workpiece to which it is attached. 12 is a partial cross-sectional view schematically showing the structure of the thermal transfer film element according to the fourth preferred embodiment of the present invention, in which part of the elements are transferred to the workpiece to which it is attached and cured.

1: Thermal transfer film element

10: Primer coating

12: Weather-resistant graphics layer

120: top surface

14: Transparent protective layer

140: upper surface

16: Release layer

18: basal layer

2: Workpiece

20: Outer surface

22: Next layer

Claims (8)

A thermal transfer film element is used to decorate an outer surface of a workpiece. The thermal transfer film element includes: A primer coating, the composition by weight of which contains: 1.0 to 2.0 parts by weight of a first acrylic resin, 1.0 to 2.0 parts by weight of a first polyvinylidene fluoride resin (PVDF) or a first fluorine Olefin-vinyl ether copolymer (FEVE), 1.0 to 3.0 parts by weight of a first inorganic colorant, and 0.1 to 0.5 parts by weight of a first additive, and a first thickness of the primer coating is equal to or greater than 20 μm ; A weather-resistant graphics layer is coated on the primer coating, the weather-resistant graphics layer in parts by weight includes: 1.0 to 2.0 parts by weight of a second acrylic resin, 2.0 to 4.0 parts by weight of a second Polyvinylidene fluoride resin or a second fluoroolefin-vinyl ether copolymer, 1.0 to 5.0 parts by weight of a second inorganic colorant, and 0.1 to 1.0 parts by weight of a second additive. Two thicknesses are equal to or greater than 3μm, wherein the second inorganic colorant presents a pattern; a transparent protective layer is covered on the weather-resistant pattern layer, and is made of a third polyvinylidene fluoride resin or a third fluorine Olefin-vinyl ether copolymer, a third thickness of the transparent protective layer is equal to or greater than 20 μm; a release layer is coated on the transparent protective layer; and a base layer is bonded to the release layer Layer; wherein the outer surface of the workpiece is first selectively coated with an adhesive layer, the thermal transfer film element is attached to the outer surface of the workpiece with the primer coating, when the release layer When detached from the transparent protective layer, the base layer is simultaneously removed from the outer surface of the workpiece along with the release layer, and the primer coating, the weather-resistant pattern layer, and the transparent protective layer are baked at a drying temperature Dry and then cure, when the thermal transfer film element is formed by the first polyvinylidene fluoride resin, the second polyvinylidene fluoride resin, and the third polyvinylidene fluoride resin, the drying temperature One temperature range is 230°C to 250°C, when the heat transfer film element is composed of the first fluoroolefin-vinyl ether copolymer, the second fluoroolefin-vinyl ether copolymer, and the third fluoroolefin- When the vinyl ether copolymer is formed, the drying temperature ranges from 160° C. to 180° C., and one of the abrasion coefficients of the transparent protective layer and the weather-resistant pattern layer is equal to or greater than 40. The thermal transfer film element according to claim 1, which complies with  ASTM G154 test standard,  the outer surface is coated with the adhesive layer, the primer coating, the weather-resistant graphic layer and the transparent protective layer of the workpiece After being exposed for 4000 hours, the color change (ΔE) of one of the weather-resistant graphic layer and the transparent protective layer is equal to or less than 5, and the gloss retention of one of the weather-resistant graphic layer and the transparent protective layer is equal to or greater than 50%. A thermal transfer film element is used to decorate an outer surface of a workpiece. The thermal transfer film element includes: A weather-resistant graphic layer, the components of which in parts by weight include: 1.0 to 2.0 parts by weight of a first acrylic resin, 2.0 to 4.0 parts by weight of a first polyvinylidene fluoride resin or a first fluoroolefin-vinyl group Ether copolymer, 1.0 to 5.0 parts by weight of an inorganic colorant, and 0.1 to 1.0 part by weight of an additive, a first thickness of the weather-resistant pattern layer is equal to or greater than 3 μm, wherein the inorganic colorant presents a pattern; a transparent The protective layer is covered on the weather-resistant graphic layer and is formed of a second polyvinylidene fluoride resin or a second fluoroolefin-vinyl ether copolymer. A second thickness of the transparent protective layer is equal to Or greater than 20μm; a release layer is coated on the transparent protective layer; and a base layer is bonded to the release layer, wherein the outer surface of the workpiece is first selectively coated with an adhesive layer and Coat a primer coating, and the thermal transfer film element is attached to the primer coating with the weather-resistant graphic layer. When the release layer is separated from the transparent protective layer, the base layer accompanies the release The layer is removed from the outer surface of the workpiece at the same time, the weather-resistant pattern layer and the transparent protective layer are dried at a drying temperature and then cured. When the thermal transfer film element is made of the first polyvinylidene fluoride resin And when the second polyvinylidene fluoride resin is formed, one of the drying temperatures ranges from 230°C to 250°C, and when the thermal transfer film element is made of the first fluoroolefin-vinyl ether copolymer and When the second fluoroolefin-vinyl ether copolymer is formed, the drying temperature ranges from 160° C. to 180° C., and one of the abrasion coefficients of the transparent protective layer and the weather-resistant pattern layer is equal to or greater than 40. The thermal transfer film element according to claim 3, which complies with  ASTM G154 test standard,  the outer surface is coated with the adhesive layer, the primer coating, the weather-resistant graphic layer and the transparent protective layer of the workpiece After being exposed for 4000 hours, the color change (ΔE) of one of the weather-resistant graphic layer and the transparent protective layer is equal to or less than 5, and the gloss retention of one of the weather-resistant graphic layer and the transparent protective layer is equal to or greater than 50%. A thermal transfer film element is used to decorate an outer surface of a workpiece. The thermal transfer film element includes: A primer coating, the composition by weight of which contains: 1.0 to 2.0 parts by weight of a first acrylic resin, 1.0 to 2.0 parts by weight of a first polyvinylidene fluoride resin (PVDF) or a first fluorine Olefin-vinyl ether copolymer (FEVE), 1.0 to 3.0 parts by weight of a first inorganic colorant, and 0.1 to 0.5 parts by weight of a first additive, and a first thickness of the primer coating is equal to or greater than 20 μm ; A weather-resistant graphics layer is coated on the primer coating, the weather-resistant graphics layer in parts by weight includes: 1.0 to 2.0 parts by weight of a second acrylic resin, 2.0 to 4.0 parts by weight of a second Polyvinylidene fluoride resin or a second fluoroolefin-vinyl ether copolymer, 1.0 to 5.0 parts by weight of a second inorganic colorant, and 0.1 to 1.0 parts by weight of a second additive. Two thicknesses are equal to or greater than 3 μm, wherein the second inorganic pigment presents a pattern; a release layer is coated on the weather-resistant pattern layer; and a base layer is bonded to the release layer; wherein the workpiece The outer surface is first selectively coated with an adhesive layer, the thermal transfer film element is attached to the outer surface of the workpiece with the primer coating, when the release layer is separated from the weather-resistant graphic layer When the base layer along with the release layer is removed from the outer surface of the workpiece at the same time, the primer coating and the weather-resistant graphic layer are dried at a drying temperature and then cured. When the thermal transfer film element When it is formed by the first polyvinylidene fluoride resin and the second polyvinylidene fluoride resin, a temperature range of the drying temperature is 230°C to 250°C, and when the heat transfer film element is formed by the When the first fluoroolefin-vinyl ether copolymer and the second fluoroolefin-vinyl ether copolymer are formed, the drying temperature ranges from 160°C to 180°C, and one of the abrasion coefficients of the weather-resistant pattern layer is Equal to or greater than 40. The thermal transfer film element according to claim 5, which complies with  ASTM G154 test standard,  the outer surface is coated with the adhesive layer, the primer coating and the weather-resistant graphic layer are exposed to the workpiece for 4000 hours The color change (ΔE) of one of the weather-resistant graphic layers is equal to or less than 5, and the gloss retention force of one of the weather-resistant graphic layers is equal to or greater than 50%. A thermal transfer film element is used to decorate an outer surface of a workpiece. The thermal transfer film element includes: A weather-resistant graphic layer, the components by weight of which comprise: 1.0 to 2.0 parts by weight of acrylic resin, 2.0 to 4.0 parts by weight of polyvinylidene fluoride resin or monofluoroolefin-vinyl ether copolymer, 1.0 to 2.0 parts by weight 5.0 parts by weight of a first inorganic colorant and 0.1 to 1.0 part by weight of an additive, a thickness of the weather-resistant pattern layer is equal to or greater than 3μm, wherein the inorganic colorant presents a pattern; a release layer is coated on The weather-resistant graphic layer; and a base layer bonded to the release layer, wherein the outer surface of the workpiece is first selectively coated with an adhesive layer and coated with a primer coating, the thermal transfer film The element is attached to the primer coating with the weather-resistant graphic layer. When the release layer is separated from the weather-resistant graphic layer, the base layer is simultaneously removed from the outer surface of the workpiece along with the release layer. The weather-resistant graphic layer is dried and then cured at a drying temperature. When the thermal transfer film element is formed of the polyvinylidene fluoride resin, one of the drying temperatures ranges from 230°C to 250°C. When the thermal transfer film element is formed of the fluoroolefin-vinyl ether copolymer, the drying temperature ranges from 160° C. to 180° C., and a wear coefficient of the weather-resistant pattern layer is equal to or greater than 40. The thermal transfer film element according to claim 7, which complies with  ASTM G154 test standard,  the outer surface is coated with the adhesive layer, the primer coating and the weather-resistant graphic layer are exposed to the workpiece for 4000 hours The color change (ΔE) of one of the weather-resistant graphic layers is equal to or less than 5, and the gloss retention force of one of the weather-resistant graphic layers is equal to or greater than 50%.

Images