Variable hue gloss film

Abstract

The present invention relates to a hue-variable gloss film, and more specifically, the film comprises a sheet-like base film 100, a hue printing layer 200 formed on the upper surface of the base film 100, a pattern printing layer 300 formed on the upper surface of the hue printing layer 200 and having a plurality of pattern grooves 310, a pattern groove printing layer 400 printed to fill the inside of the pattern grooves 310, and an auxiliary hue portion 900 formed on the upper surface of the pattern printing layer 300, wherein the auxiliary hue portion 900 includes an auxiliary hue printing layer 800, and the hue printing layer 200, pattern printing layer 300, pattern groove printing layer 400 and auxiliary hue printing layer 800 have different refraction angles from each other.

Description

[Technical Field]

[0001] The present invention relates to a hue-variable glossy film, and more particularly to a hue-variable glossy film that can express various hues depending on the viewing angle and has excellent durability. [Background technology]

[0002] BACKGROUND ART Surface protection films have been used to protect and decorate the surfaces of automobiles, housings for electrical appliances, furniture, building materials, and the like.

[0003] Glossy films are used as such surface protection films, and they can be surface printed and specially treated to achieve a wide variety of colors and patterns and effectively maintain their glossiness. However, such glossy films have relatively poor physical properties such as elasticity and tensile strength, making them susceptible to damage even by small impacts.

[0004] In addition, most conventional glossy films are composed of only a single color or pattern, which not only fails to fully meet the diverse needs of consumers, but also has the drawback of being easily tired of when used for a long period of time. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been devised to solve the above-mentioned problems, and aims to provide a hue-variable glossy film that has a base film with a patterned printed layer having pattern grooves as well as multiple multi-colored printed layers, so that the hue can be perceived as different hues depending on the viewing angle, thereby meeting a wide variety of consumer needs.

[0006] Another object of the present invention is to provide a color-variable gloss film that is highly durable. [Means for solving the problem]

[0007] To achieve the above-mentioned objectives, the color-variable glossy film according to the present invention comprises a sheet-shaped base film 100, a color printing layer 200 formed on the upper surface of the base film 100, a pattern printing layer 300 formed on the upper surface of the color printing layer 200 and having a plurality of pattern grooves 310, a pattern groove printing layer 400 printed to fill the inside of the pattern grooves 310, and an auxiliary color portion 900 formed on the upper surface of the pattern printing layer 300, wherein the auxiliary color portion 900 includes an auxiliary color printing layer 800 that imparts color and gloss to the glossy film, and the color printing layer 200, pattern printing layer 300, pattern groove printing layer 400 and auxiliary color printing layer 800 have different refraction angles from each other.

[0008] A color printed layer 200 is further formed between the base film 100 and the pattern printed layer 300.

[0009] The auxiliary color part 900 is characterized by including an auxiliary film 700 and the auxiliary color printed layer 800 formed on the upper or lower surface of the auxiliary film 700 .

[0010] A primer layer 600 and an adhesive layer 650 are interposed between the pattern-printed layer 300 and the auxiliary color part 900 .

[0011] The color printing layer 200 has a larger refraction angle than the pattern printing layer 300, the pattern printing layer 300 has a larger refraction angle than the pattern groove printing layer 400, and the pattern groove printing layer 400 has a larger refraction angle than the auxiliary color printing layer 800.

[0012] A number of concave-convex portions 312 are formed on the sidewalls of the pattern groove 310, and the concave-convex portions 312 are characterized by being sawtooth-shaped.

[0013] A number of uneven portions 812 are also formed on the surface of the auxiliary color portion 900, but the uneven portions 812 are formed at positions that do not correspond to the pattern grooves 310 in the vertical direction.

[0014] The color-variable glossy film further includes a rear print layer 500 formed on the rear surface of the base film 100 . [Effects of the Invention]

[0015] The color-variable gloss film according to the present invention has the advantages of being able to display a wide variety of colors depending on the viewing angle and having excellent durability. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a cross-sectional view of a glossy film according to the present invention. [Figure 2] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 3] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 4] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 5] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 6] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 7] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 8] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 9] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 10] FIG. 2 is a cross-sectional view of another embodiment of a glossy film according to the present invention. [Figure 11] 1 is a photograph of a glossy film according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The color-variable glossy film according to the present invention comprises a sheet-shaped base film 100, a color printing layer 200 formed on the upper surface of the base film 100, a pattern printing layer 300 formed on the upper surface of the color printing layer 200 and having a plurality of pattern grooves 310, a pattern groove printing layer 400 printed to fill the inside of the pattern grooves 310, and an auxiliary color portion 900 formed on the upper surface of the pattern printing layer 300, wherein the auxiliary color portion 900 includes an auxiliary color printing layer 800 that imparts color and gloss to the glossy film, and the color printing layer 200, pattern printing layer 300, pattern groove printing layer 400 and auxiliary color printing layer 800 have different refraction angles from one another.

[0018] A color printed layer 200 is further formed between the base film 100 and the pattern printed layer 300.

[0019] The auxiliary color part 900 is characterized by including an auxiliary film 700 and the auxiliary color printed layer 800 formed on the upper or lower surface of the auxiliary film 700 .

[0020] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0021] FIG. 1 is a cross-sectional view of a glossy film according to the present invention.

[0022] The glossy film of the present invention, whose hue changes depending on the viewing angle, i.e., the viewing angle, is attached to the surfaces of buildings, automobiles, furniture, home appliances, and mobile phones. That is, the color printing layer, pattern printing layer, pattern groove printing layer, and auxiliary color portion are used to realize a wider variety of colors, ensuring durability, and enabling efficient refraction and reflection of light at the viewing angle, thereby making it possible to express a wide variety of colors.

[0023] That is, as shown in FIG. 1, the glossy film according to the present invention comprises a sheet-shaped base film 100, a color printing layer 200 formed on the upper surface of the base film 100, a pattern printing layer 300 formed on the upper surface of the color printing layer 200 and having a plurality of pattern grooves 310, a pattern groove printing layer 400 printed to fill the inside of the pattern grooves 310, and an auxiliary color portion 900 formed on the upper surface of the pattern printing layer 300, wherein the auxiliary color portion 900 includes an auxiliary color printing layer 800 that imparts color and gloss to the glossy film, and the color printing layer 200, pattern printing layer 300, pattern groove printing layer 400 and auxiliary color printing layer 800 have different refraction angles from each other.

[0024] The base film 100 is made of any one of a PET film, a PC film, a PP film, and a PVC film, and may be transparent or may have a color.

[0025] A color printed layer 200 is formed on the upper surface of the base film 100. The color printed layer 200 formed on the upper surface of the base film 100 may be made of any ink as long as it has a different refraction angle and hue from the pattern printed layer 300, pattern groove printed layer 400, and auxiliary color printed layer 800, which are formed on the upper surface of the base film 100 in this order. For example, transparent UV ink, color UV ink, and even solvent ink may be used.

[0026] A pattern printed layer 300 and a pattern groove printed layer 400 are formed on the upper surface of the color printed layer 200. That is, the pattern printed layer 300 has a number of pattern grooves 310, and the pattern groove printed layer 400 is printed inside the pattern grooves 310. The pattern printed layer 300 and the pattern grooves 310 are formed using a single printing process. This printing method is well known in the art, so further detailed description will be omitted. For example, transparent UV ink, color UV ink, and even solvent ink can be used.

[0027] As shown in FIG. 1, the pattern groove 310 may be formed to have a V-shaped cross section, but the present invention is not limited thereto.

[0028] A large number of the pattern grooves 310 are formed side by side in the width direction, and the pattern groove printing layer 400 that fills the pattern grooves 310 is printed with a material having a different refractive index from the pattern printing layer 300 and the hue printing layer 200. For example, transparent UV ink, hue UV ink, and even solvent ink can be used.

[0029] An auxiliary color portion 900 is formed on the upper surface of the pattern printed layer 300. The auxiliary color portion 900 includes an auxiliary color printed layer 800 and has a different refraction angle from the color printed layer 200, the pattern printed layer 300, and the pattern groove printed layer 400. The auxiliary color printed layer 800 not only imparts color and gloss to the glossy film, but also has a different refraction angle from the color printed layer 200, the pattern printed layer 300, and the pattern groove printed layer 400, thereby enabling a wide variety of colors to be expressed depending on the viewing angle. In this case, the auxiliary color printed layer 800 can be printed with UV ink, regular ink, or ink containing metal powder.

[0030] Therefore, as shown in Figure 1, when the viewing direction is perpendicular to the surface of the glossy film, the viewing angle is not refracted and is perceived as the original printed hue, but when the viewing direction is oblique, the viewing angle is refracted several times and interference occurs with the hue of the pattern groove 310, making it appear as if it is a different hue.

[0031] In addition, to further improve durability, the auxiliary color part 900 may be formed only from an auxiliary color printed layer 800 obtained by printing ink on the pattern printed layer 300 as shown in Fig. 1, or may be formed from an auxiliary film 700 made of one or more of PET, PP, PVC, PC, and PMMA and an auxiliary color printed layer 800 formed on the upper or lower surface of the auxiliary film 700 as shown in Figs. 2 and 3. When the auxiliary film 700 is further provided, the pattern printed layer 300 and the pattern groove printed layer 400 can be protected more stably, thereby increasing durability.

[0032] In addition, in order to prevent the auxiliary color portion 900 from being easily separated from the base film 100 and the pattern-printed layer 300, it is more preferable that a primer layer 600 and an adhesive layer 650 are interposed between the auxiliary color portion 900 and the pattern-printed layer 300, as shown in Figures 4 and 5. That is, the auxiliary color portion 900 and the pattern-printed layer 300 are bonded together by the primer layer 600 and the adhesive layer 650, and in this case, the durability of the film can be significantly improved.

[0033] The adhesive layer 650 may be made of one or more adhesives or pressure-sensitive adhesives selected from PVC, PVA, PVB, EVA, PAI, PP, PE, urethane, acrylic, rubber urea, phenol, silicone, alkyl resin, polyamide, polyimide, and polyester. For stronger adhesive strength, a material containing sulfone polyester and melamine-formaldehyde resin in a weight ratio of 1 to 10:1 may also be used, but the present invention is not necessarily limited thereto.

[0034] Additionally, any common material within this technology can be used as the primer layer 600, and the present invention is not limited to this.

[0035] The present invention expresses a wide variety of colors through refraction in the color printing layer 200, pattern printing layer 300, and pattern groove printing layer 400 depending on the viewing angle, and by using the auxiliary film color part 900, the wide variety of colors of the glossy film can be realized more clearly.

[0036] Meanwhile, the color printed layer 200 can be configured to have a larger refraction angle than the pattern printed layer 300, which can have a larger refraction angle than the pattern groove printed layer 400, which can have a larger refraction angle than the auxiliary color printed layer 800. If the refraction angle gradually increases downward, the refraction angle gradually increases as the light passes through each layer when the viewing angle is oblique. Therefore, when the light reaches the base film 100, the viewing angle becomes nearly horizontal, allowing for the expression of dark colors that are almost black. As the viewing angle becomes more vertical, the light gradually becomes brighter and more vivid. Furthermore, when the light reaches the base film 100 using these printing layers, almost no light passes through.

[0037] 6, the glossy film according to the present invention may further include a rear printing layer 500 formed on the rear surface of the base film 100. In this case, the rear printing layer 500 may be the same color as the pattern groove printing layer 400, or may be a different color from the pattern groove printing layer 400 according to the designer's choice, but it is preferable that the rear printing layer 500 be composed of different colors in order to express a wide variety of colors.

[0038] In this way, if the rear print layer 500 is further formed on the rear surface of the base film 100, it is possible to realize a wider variety of colors according to the viewing angle of the glossy film.

[0039] Additionally, the glossy film according to the present invention may be configured so that the light beam is irregularly refracted as it passes through the pattern grooves 310, as shown in FIG.

[0040] For example, the glossy film according to the present invention may have a number of concave-convex portions 312 formed on the side walls of the pattern grooves 310 formed on the upper surface of the pattern printed layer 300. When a number of concave-convex portions 312 are formed on the side walls of the pattern grooves 310 in this manner, light passing through the pattern groove printed layer 400 is refracted in irregular directions as it passes through the side walls of the pattern grooves 310, and this diffracted refraction makes it possible to express a wide variety of colors and glosses.

[0041] At this time, the size and pattern of the uneven portion 312 can be selected in various ways depending on various conditions, such as the size of the pattern groove 310 and the inclination of the sidewall of the pattern groove 310. For example, as shown in Fig. 8, the uneven portion 312 may have a sawtooth shape, in which case various refraction angles are formed according to the viewing angle, and the irregularity increases, making it possible to realize various colors at oblique viewing angles.

[0042] 9, a number of uneven portions 812 are also formed on the surface of the auxiliary color portion 900 (the surface of the auxiliary color printed layer 800 or the auxiliary film 700), thereby inducing diffuse refraction. However, it is preferable that the uneven portions 812 formed on the auxiliary color portion 900 are formed at a position that does not correspond to the pattern groove 310 in the vertical direction. This is because if the uneven portions 312, 812 are formed at a position that corresponds to the vertical direction, it may be difficult to produce a vivid color, even if the viewing angle is perpendicular to the glossy film.

[0043] Meanwhile, the glossy film of the present invention may not include the color printed layer 200, as shown in Fig. 10. If the color printed layer 200 is not included, the glossy film of the present invention includes a sheet-like base film 100, a pattern printed layer 300 formed on the upper surface of the base film 100 and having a number of pattern grooves 310, a pattern groove printed layer 400 printed to fill the interior of the pattern grooves 310, and an auxiliary color portion 900 formed on the upper surface of the pattern printed layer 300, the auxiliary color portion 900 including an auxiliary color printed layer 800, and the pattern printed layer 300, the pattern groove printed layer 400, and the auxiliary color printed layer 800 have different refraction angles.

[0044] In other words, even if the color printing layer 200 is not provided, it goes without saying that a wide variety of colors can be expressed by using the different refraction angles of the pattern printing layer 300, the pattern groove printing layer 400, and the auxiliary color printing layer 800.

[0045] Figure 11 shows photographs of the glossy film of the present invention. The photograph on the left was taken at a shooting angle close to vertical, and the photograph on the right was taken at a shooting angle of approximately 45°. It can be seen that the hue expression differs depending on the shooting angle.

[0046] The method for producing a glossy film according to the present invention will now be described.

[0047] When manufacturing the glossy film according to the present invention, first, a color print layer 200 is formed on the upper surface of a base film 100, and then a pattern print layer 300 and a pattern groove 310 are formed.

[0048] At this time, the pattern groove 310 and the pattern printing layer 300 are formed by UV printing, but the printing method of the pattern printing layer 300 and the pattern groove 310 is not limited to the mold method and can be changed and applied in a variety of ways.

[0049] After the printing of the pattern printed layer 300 and the pattern grooves 310 is completed, the pattern groove printed layer 400 is printed on the upper surface of the pattern printed layer 300 so that the pattern grooves 310 are filled.

[0050] Then, the auxiliary color part 900 is formed on the pattern groove printed layer 400 .

[0051] In addition, when the auxiliary color part 900 includes an auxiliary film 700, after forming the pattern printed layer 300, a primer is applied to form a primer layer 600, and an adhesive or pressure-sensitive adhesive is further applied thereto to form an adhesive layer 650, and then the auxiliary color part 900 can be attached.

[0052] Meanwhile, if a rear printing layer 500 needs to be printed on the rear surface of the base film 100 , the printing process of the rear printing layer 500 may be performed in the step of printing the color printing layer 200 on the upper surface of the base film 100 .

[0053] Although the present invention has been described in detail with reference to the preferred embodiments, the scope of the present invention should not be limited to the specific embodiments but should be interpreted by the appended claims. It should be understood that those skilled in the art can make many modifications and variations without departing from the scope of the present invention.

Claims

1. A sheet-like base film (100), A color print layer (200) formed on the upper surface of the base film (100); a pattern printing layer (300) formed on the upper surface of the color printing layer (200) and having a number of pattern grooves (310); A pattern groove printing layer (400) printed so as to fill the inside of the pattern groove (310); and an auxiliary color portion (900) formed on the upper surface of the pattern printed layer (300), the auxiliary color portion (900) comprising an auxiliary color printed layer (800) that imparts color and gloss to the glossy film; The color-variable gloss film is characterized in that the color-printed layer (200), the pattern-printed layer (300), the pattern-groove-printed layer (400) and the auxiliary color-printed layer (800) have different refraction angles.

2. The color-variable gloss film according to claim 1, further comprising a color-printed layer (200) formed between the base film (100) and the pattern-printed layer (300).

3. The color-variable gloss film according to claim 1 or 2, characterized in that the auxiliary color portion (900) is composed of an auxiliary film (700) and the auxiliary color printing layer (800) formed on the upper or lower surface of the auxiliary film (700).

4. The color-variable gloss film according to claim 3, wherein a primer layer (600) and an adhesive layer (650) are interposed between the pattern-printed layer (300) and the auxiliary color portion (900).

5. 5. The color-variable gloss film of claim 4, wherein the color-printed layer (200) has a larger refraction angle than the pattern-printed layer (300), the pattern-printed layer (300) has a larger refraction angle than the pattern-groove-printed layer (400), and the pattern-groove-printed layer (400) has a larger refraction angle than the auxiliary color-printed layer (800).

6. A number of uneven portions (312) are formed on the sidewalls of the pattern groove (310), 6. The color-variable gloss film according to claim 5, wherein the uneven portion (312) is sawtooth-shaped.

7. The color-variable gloss film according to claim 6, wherein a number of uneven portions (812) are also formed on the surface of the auxiliary color portion (900), but the uneven portions (812) are formed in a portion that is not in a position that corresponds vertically to the pattern groove (310).

8. The hue-variable gloss film according to any one of claims 1 to 7, further comprising a rear print layer (500) formed on the rear surface of the base film (100).

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