TWM584255U - Transfer film and article using the transfer film - Google Patents

Abstract

The present invention discloses a transfer film including a plastic film, an ultraviolet light reaction layer formed on the plastic film, and a transparent adhesive layer formed on the ultraviolet light reaction layer. The plastic film undergoes a drying operation so that the weight percentage of its average water content is less than or equal to 5%. The ultraviolet light reaction layer and the transparent adhesive layer are fabricated on the plastic film after the drying operation.

Description

Transfer film and article using the same

The present invention relates to a transfer film applicable to a vacuum transfer process and an article using the transfer film.

Forming a decorative surface on the surface of an article to provide visual effects, such as a patterned surface, a patterned surface, a color surface, or a metallic shiny surface, has been commonly found in various articles, such as mobile phones, tablet computers, home appliances, and vehicles. At present, the method of forming the decorative surface generally includes electroplating, vapor deposition, spray coating, thermal transfer, and water transfer printing. In addition, there are also environmentally friendly vacuum transfer methods.

In the vacuum transfer technology, Taiwan Patent No. I647124 discloses a transfer film that needs to be humidified. The layered structure of the humidified transfer film is a polyvinyl alcohol film (PVA film) in sequence, and is formed of an oil-soluble coating. There are five layers, such as a pattern layer, a decorative layer formed from a decorative paint, an oil-soluble fixing layer, and an ultraviolet activator layer. The ultraviolet activator layer also penetrates through the decorative layer. Wherein, the humidified transfer film is evacuated and irradiated with ultraviolet rays in an environment heated to 40 to 150 ° C., so that the humidified transfer film is covered on the surface of an article, and the ultraviolet activator layer is applied. After curing, the PVA film is peeled off so that the pattern layer remains on the surface of the article, forming a high-gloss pattern. In this way, the hierarchical structure of the article is the article itself, the pattern layer, the decorative layer, the oil-soluble fixing layer, and the cured ultraviolet activator layer from the inside to the outside. The problem is that the surface of the article using such a conventional transfer film does not show a mirror effect, and the hierarchical structure of the conventional transfer film is complicated (up to five layers), and it must be humidified to complicate the manufacturing process.

In view of the foregoing problems of the prior art, the present invention provides a new transfer film including: an ultraviolet light reaction layer, which is cured to form a transparent hardened layer after being irradiated with ultraviolet light; a plastic film provided on the ultraviolet light reaction layer An upper surface, and the ultraviolet light reaction layer can be peeled off from the upper surface, wherein the weight percentage of the average moisture content of the plastic film is less than or equal to 5%; and a transparent adhesive layer is formed on the ultraviolet light reaction layer Look at the surface. The plastic film may be a polyvinyl alcohol film. In one embodiment, the thickness of the plastic film is 30 to 100 μm, the thickness of the ultraviolet light reaction layer is 10 to 20 μm, and the thickness of the transparent adhesive layer is 20 to 30 μm.

The present invention also provides an article having a high-gloss metallic mirror surface and including the transparent adhesive layer taken from the above-mentioned transfer film and the transparent hardened layer formed by curing the ultraviolet light reaction layer, the transparent The adhesive layer is adhered to the high-gloss metal mirror surface.

The present invention also provides another transfer film, which includes an ultraviolet light reaction layer, which is cured to form a transparent hardened layer after being irradiated with ultraviolet light; a plastic film is provided on an upper surface of the ultraviolet light reaction layer, and can The ultraviolet light reaction layer is peeled from the upper surface, wherein the weight percentage of the average moisture content of the plastic film is less than or equal to 5%; a high-gloss metal mirror layer is formed on the lower surface of the ultraviolet light reaction layer; and an adhesive Layer formed on the lower surface of the high-gloss metal mirror layer. The plastic film may be a polyvinyl alcohol film. In one embodiment, the thickness of the plastic film is 30 to 100 µm, the thickness of the ultraviolet light reaction layer is 10 to 20 µm, and the thickness of the adhesive layer is 20 to 30 µm. Among them, the plastic film has the thickest thickness and the high-gloss metal mirror layer has the thinnest thickness. .

The present invention further provides another article, the article has a surface, and includes the adhesive layer, the high-gloss metal mirror layer, and the transparent layer formed by curing the ultraviolet light reaction layer taken from the other transfer film. A hardened layer, the adhesive layer is adhered to the surface.

Compared with the prior art, the articles using the above-mentioned transfer film can exhibit near-glossy, or even mirror-like effects, and solve the problem that articles using conventional transfer films do not exhibit a mirror-like effect. Furthermore, the hierarchical structure of the above-mentioned transfer film of the present invention is simple and does not require humidification, which is sufficient to solve the above-mentioned problems of the prior art.

FIG. 1 schematically shows a partial cross-sectional structure of a transfer film 1. The transfer film 1 is a preferred embodiment of the present invention. The transfer film 1 includes a plastic film 11, an ultraviolet light reaction layer 12, and a transparent adhesive layer. 13. The plastic film 11 is disposed on an upper surface of the ultraviolet light reaction layer 12, and the ultraviolet light reaction layer 12 can be peeled off from the upper surface. The transparent adhesive layer 13 is formed on a lower surface of the ultraviolet light reaction layer 12. More specifically, the plastic film 11 is the thickest layer, preferably having a thickness of about 30 to 100 μm, and preferably a polyvinyl alcohol film (PVA film), but not limited thereto. The thickness of the ultraviolet light reaction layer 12 is preferably about 10-20 μm. After being irradiated with ultraviolet light of an appropriate energy, the ultraviolet light reaction layer 12 is cured to form a transparent hardened layer 12 a in FIG. 6. The transparent adhesive layer 13 preferably has a thickness of about 20-30 μm. The transparent hardened layer 12 a is adhered to a surface 51 of an article 5 in FIG. 6 through the transparent adhesive layer 13. In this embodiment, the surface 51 is a high-gloss metal mirror surface, but is not limited thereto. The color of the glossy metallic mirror surface can be selected from gold, platinum, chrome, or silver, but it is not limited thereto. The specular metallic mirror surface may be the entire surface, or a surface composed of a plurality of points or regions with a small gap between each other. This surface appears to the naked eye as a complete surface, but in the microscopic point or between regions There are gaps. The high-gloss metal mirror surface can be formed by evaporation, non-conductive vacuum coating (NCVM), anodizing, or electroplating, but is not limited thereto.

The plastic film 11 needs to be dried first to remove the moisture of the plastic film 11 to reduce the water content of the plastic film 11. In this embodiment, the average water content of the plastic film 11 is a weight percentage. Preferably, it is less than or equal to 5%, more preferably less than or equal to 3%, and then, the above-mentioned ultraviolet light reaction layer 12 and transparent adhesive layer 13 are fabricated on the plastic film 11 after the drying operation. The aforementioned drying operation may be performed by a hot pressing method, but other methods may also be selected to perform the drying operation, so as to remove as much water as possible from the plastic film 11 so as to make the surface of the plastic film 11 as flat as possible. The non-drying plastic film 11 usually causes unevenness of its surface under the micro because of its high water content. This problem will affect the quality of the final transfer film, and the quality of the transfer film will affect the use of the transfer film. The surface of the film exhibits an effect. The surface of the plastic film 11 after the drying operation is relatively flat, and the quality of the transfer film 1 made of the substrate is relatively good. Wherein, the aforementioned hot pressing method may be as shown in FIG. 2, and the plastic film 11 is hot-pressed with one or more pairs of hot-roller rollers 10 whose flat surfaces are flat. The hot-pressing temperature is about 60 to 120 ° C. This is limited.

Furthermore, the plastic film 11 is finally torn off from the ultraviolet light reaction layer 12 (to be described later). In order to make the plastic film 11 easily torn off, the plastic film 11 is preferably provided with a releasing ability, for example, Choose a plastic material with good release characteristics to make the plastic film 11, or form a release layer (not shown) on the side of the plastic film 11 opposite to the ultraviolet light reaction layer 12. The layer is located between the plastic film 11 and the ultraviolet light reaction layer 12, and the thickness of the release layer is preferably about 10-15 μm.

Figures 3 to 5 are used to help explain the use of the new-type transfer film 1 in a vacuum transfer process. Two items 5 are shown in the figure to explain only one of the items 5. First, as shown in FIG. 3, the article 5 is fixed to a jig 32 on a lifting table 31. The article 5 may be a metal or non-metal article, such as various products made of aluminum, plastic, glass, wood, leather, cloth, fiberglass, or carbon fiber, etc. In this embodiment, the article 5 It is a mobile phone case, but not limited to this. Above the lifting table 31 is a sheet of the transfer film 1 of the present invention. The transfer film 1 has its periphery clamped by a clamp 6. The lifting table 31 has a plurality of fine holes (not shown) penetrating the upper and lower table surfaces, and the lifting table 31, the transfer film 1 and a heating device 4 located above the transfer film 1 are all located in the same vacuum. Inside the cabin 2. The heating device 4 heats the transfer film 1 so that the transfer film 1 is softened and easily stretched. In this embodiment, the transparent adhesive layer 13 is a hot-melt adhesive, so the heating device 4 can also provide the thermal energy required by the transparent adhesive layer 13 at the same time. However, the transparent adhesive layer 13 may also be selected from other types of adhesives, such as UV-curable adhesive.

Next, as shown in FIG. 4, the lifting platform 31 is raised so that the article 5 abuts against the transfer film 1, and then, as shown in FIG. 5, the lower half of the vacuum chamber 2 is evacuated (arrows in the figure). (Represents the direction of air flow during evacuation), so that the transfer film 1 is tightly adhered to the surface 51 of the article 5, at this time, the transfer film 1 has been firmly adhered by the transparent adhesive layer 13于 该 表面 51。 On the surface 51.

After that, the vacuum is stopped, and the ultraviolet light (not shown) is irradiated to the transfer film 1 on the article 5 with ultraviolet light, so that the ultraviolet light reaction layer 12 is cured to become the transparent hardened layer 12a in FIG. 6. . Then, the plastic film 11 is peeled off to obtain the article 5 having the transparent hardened layer 12a, as shown in FIG. 6.

Since the ultraviolet light reaction layer 12 and the transparent adhesive layer 13 are formed on the flat surface of the plastic film 11 subjected to the drying operation, the ultraviolet light reaction layer 12 and the adhesive layer 13 produced will be quite flat, so that After the two layers are transferred to the article 5 by the above process, the surface 51 (high-gloss metal mirror surface) of the article 5 can provide a good reflection effect though the transparent hardened layer 12a and the transparent adhesive layer 13 ( (Figures 7 to 8), that is, the surface 51 of the article 5 exhibits a high-gloss almost mirror-like effect, or even a mirror-like effect. Among them, Figs. 7 to 9 show the photos of the ultraviolet light reaction layer 12 and the transparent adhesive layer 13 of the new transfer film 1 transferred to the back of a mobile phone case. The back is a silver high-gloss metal mirror surface. The layer 12 has been cured into a transparent hardened layer, in which a part of the mobile phone case and the mapping formed on the left side of each photo show the image on the left, and the right side is the physical object corresponding to the image.

In addition, FIG. 10 shows that another transfer film 1 'of the present invention includes a plastic film 11', an ultraviolet light reaction layer 12 ', an adhesive layer 13', and a high-gloss metal mirror layer 14 '. Wherein, the plastic film 11 'is disposed on an upper surface of the ultraviolet light reaction layer 12', and the ultraviolet light reaction layer 12 'can be peeled off from the upper surface. The high-gloss metal mirror layer 14' is formed in the ultraviolet light The lower surface of the layer 12 ', and the adhesive layer 13' is formed on the lower surface of the high-gloss metal mirror layer 14 '.

The plastic film 11 'and the ultraviolet light reaction layer 12' correspond to the same plastic film 11 and the ultraviolet light reaction layer 12 as described above. The adhesive layer 13 'may be the same as the transparent adhesive layer 13, but other non-transparent adhesives may be selected. The color of the high-gloss metal mirror layer 14 'may be selected from gold, platinum, chrome, or silver, but is not limited thereto. The high-gloss metal mirror surface can be formed by evaporation, non-conductive vacuum coating (NCVM), anodizing, or electroplating, but is not limited thereto.

As shown in FIG. 11, the other transfer film 1 ′ can also transfer the ultraviolet light reaction layer 12 ′, the high-gloss metal mirror layer 14 ′, and the adhesive layer 13 ′ to an article 5 ′ through the vacuum transfer process. A surface 51 ′, wherein a transparent hardened layer 12 a ′ on the article 5 ′ is formed by curing the ultraviolet reaction layer 12 ′ after being irradiated with ultraviolet light. Since the plastic film 11 ′ is also subjected to the above-mentioned drying operation, the layers of the other transfer film 1 ′ are quite flat, so that the ultraviolet light reaction layer 12 ′, the high-gloss metal mirror layer 14 ′, and the adhesive layer 13 After 'transferring to the surface 51' of an article 5 ', the article 5' can exhibit the effect of highlighting an almost mirror-like surface, or even a mirror-like surface, through the high-gloss metal mirror layer 14 'and the transparent hardened layer 12a'.

1,1’‧‧‧transfer film

11, 11’‧‧‧ plastic film

12,12’‧‧‧UV reaction layer

12a, 12a’‧‧‧ transparent hardened layer

13, 13 ’‧‧‧ transparent adhesive layer

14’‧‧‧High-gloss metal mirror layer

10‧‧‧ Hot Roller

31‧‧‧lifting platform

32‧‧‧Jig

4‧‧‧Heating device

5, 5’‧‧‧ items

51、51’‧‧‧ surface

6‧‧‧ Fixture

FIG. 1 shows a schematic cross-sectional view of the novel transfer film.
FIG. 2 is a schematic diagram showing a plastic mold 11 of the novel transfer film during a drying operation.
Figures 3 to 5 show schematic diagrams of the new transfer film used in a vacuum transfer process.
FIG. 6 shows a schematic cross-sectional view and an enlarged view of an article 5 produced by the vacuum transfer process using the novel transfer film.
Figures 7-9 show photographs of a mobile phone case using the new transfer film to show the specular effect of the highlights obtained from the transfer film.
FIG. 10 is a schematic cross-sectional view of another transfer film of the present invention.
FIG. 11 is a schematic cross-sectional view and an enlarged view of an article 5a produced by another transfer film of the present invention in the vacuum transfer process.

Claims (10)

A transfer film includes: an ultraviolet light reaction layer that is cured to form a transparent hardened layer after being irradiated with ultraviolet light; a plastic film provided on an upper surface of the ultraviolet light reaction layer and capable of being torn from the upper surface The ultraviolet light reaction layer is separated, wherein the weight percentage of the average water content of the plastic film is less than or equal to 5%; and a transparent adhesive layer is formed on the lower surface of the ultraviolet light reaction layer. The transfer film according to claim 1, wherein the plastic film is a polyvinyl alcohol film. The transfer film according to claim 1, wherein the thickness of the plastic film is 30 to 100 μm, the thickness of the ultraviolet light reaction layer is 10 to 20 μm, and the thickness of the transparent adhesive layer is 20 to 30 μm. The transfer film according to claim 1, wherein the weight percentage of the average moisture content of the plastic film is less than or equal to 3%. An article having a transfer film, the article has a high-gloss metallic mirror surface, and includes the transparent adhesive layer taken from the transfer film according to any one of claims 1 to 4 and an ultraviolet light reaction layer. The transparent hardened layer formed by curing, and the transparent adhesive layer is adhered to the high-gloss metal mirror surface. A transfer film includes: an ultraviolet light reaction layer, which is cured to form a transparent hardened layer after being irradiated with ultraviolet light; A plastic film is disposed on an upper surface of the ultraviolet light reaction layer, and the ultraviolet light reaction layer can be peeled off from the upper surface, wherein the weight percentage of the average moisture content of the plastic film is less than or equal to 5%; a highlight A metal mirror layer is formed on the lower surface of the ultraviolet light reaction layer; and an adhesive layer is formed on the lower surface of the high-light metal mirror layer. The transfer film according to claim 6, wherein the plastic film is a polyvinyl alcohol film. The transfer film according to claim 7, wherein the thickness of the plastic film is 30 to 100 μm, the thickness of the ultraviolet light reaction layer is 10 to 20 μm, and the thickness of the adhesive layer is 20 to 30 μm; wherein the maximum thickness of the plastic film, the The glossy metal mirror layer is the thinnest. The transfer film according to claim 6, wherein the weight percentage of the average moisture content of the plastic film is less than or equal to 3%. An article having a transfer film, the article having a surface and including the adhesive layer, the high-gloss metal mirror layer, and the ultraviolet light from the transfer film according to any one of claims 6 to 9. The transparent hardened layer formed by the reaction layer is cured, and the adhesive layer is adhered to the surface.