KR20220120231A - Decoration film and preparation method thereof - Google Patents

Abstract

Disclosed is a method for manufacturing a decorative film. The method for manufacturing a decorative film according to the present invention comprises the steps of: laminating a first UV pattern layer on one side of a base film; laminating a second UV pattern layer on one side of the first UV pattern layer; laminating a deposition layer on one side of the second UV pattern layer; and laminating a color ink layer on one side of the deposition layer, wherein the first UV pattern layer and the second UV pattern layer have different refractive indices.

Description

The manufacturing method of a decoration film {DECORATION FILM AND PREPARATION METHOD THEREOF}

The present invention relates to a method for manufacturing a decorative film.

In the case of a general design deco film, various optical effects are expressed depending on the shape of the pattern (prism, lens, lenticular, etc.) formed on the surface, and using this, the three-dimensional effect, luminance, depth, and texture of the design deco film are expressed. did. However, it is difficult to realize various three-dimensional patterns because patterns produced by conventional techniques such as cutting processing (ultra-precision plate processing), photolithography, etching, and electroplating methods can only implement a two-dimensional effect consisting of dots and lines.

In particular, in order to produce a design decoration film to which a multilayer UV pattern of two or more layers is applied, a first UV pattern is formed on one surface of the base film, a first deposition layer (oxide) is formed, a second UV pattern is formed, and a second UV pattern is formed. A product can be manufactured by forming a deposition layer (oxide, metal, etc.) and printing process.

However, here, the purpose of the primary oxide deposition is to add the refractive index boundary of the primary and secondary UV patterns and a process to display multi-colors, but the primary oxide deposition process takes a long process time and yields because three or more layers of multi-layered oxides are stacked. This is low and has the problem of high cost.

In addition, since the secondary UV pattern is formed on the primary oxide deposition layer, it is difficult to secure adhesion, so it is not easy to satisfy product reliability.

The present invention is capable of realizing various optical effects such as surface texture, depth and color brightness, saturation, etc., compared to the conventional digital decoration film, and can realize an improved three-dimensional effect through a complex three-dimensional overlapping effect between three-dimensional patterns. It aims to provide a manufacturing method.

In addition, an object of the present invention is to provide a method for manufacturing a decor film having a three-dimensional pattern that can implement a double three-dimensional pattern aesthetic and two or more colors through a single base film.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

A method of manufacturing a decor film according to an embodiment of the present invention comprises: laminating a first UV pattern layer on the other surface of the base film; laminating a second UV pattern layer on the other surface of the first UV pattern layer; laminating a deposition layer on the other surface of the second UV pattern layer; and laminating a color ink layer on the other surface of the deposition layer. including, wherein the first UV pattern layer and the second UV pattern layer have different refractive indices.

In addition, a difference in refractive index between the first UV pattern layer and the second UV pattern layer is 0.05 to 2.0.

In addition, the step of sequentially laminating an adhesive layer and a release film on one surface of the base film; may further include.

In addition, the first UV pattern layer and the second UV pattern layer may have different colors.

In addition, in the step of laminating the first UV pattern layer, the first UV pattern layer may include an organic polymer, nanoparticles, pigments and other additives.

In addition, in the step of laminating the second UV pattern layer, the second UV pattern layer may include an organic polymer, nanoparticles, pigments and other additives.

In addition, the first UV pattern layer comprises 40wt% to 70wt% of organic polymer, 2.5wt% to 50wt% of high refractive nanoparticles, and the second UV pattern layer is 40wt% to 70wt% of organic polymer, 5wt% to low refractive nanoparticles 45 wt % may be included.

In addition, the high refractive nanoparticles may have an average diameter of 10 nm to 50 nm, and the low refractive nanoparticles may have an average diameter of 80 nm to 90 nm.

In addition, the pigment included in the first UV pattern layer and the second UV pattern layer may have an average diameter of 5 nm to 50 nm.

According to an embodiment of the present invention, it is possible to implement various optical effects such as surface texture, depth and color brightness, saturation, etc. compared to the conventional digital decoration film, and to realize an improved three-dimensional effect through a complex three-dimensional overlapping effect between three-dimensional patterns. This is possible.

In addition, according to an embodiment of the present invention, it is possible to have a three-dimensional pattern that can implement a double three-dimensional pattern aesthetics and two or more colors through a single base film.

On the other hand, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

1 is an exemplary view schematically comparing a method for manufacturing a decorative film according to the present invention and the prior art,
Figure 2 is a flowchart showing a method of manufacturing a decorative film according to an embodiment of the present invention,
3 and 4 are exemplary views schematically showing the lamination order of the decor film manufactured according to the method for manufacturing the decor film according to an embodiment of the present invention,
5 is an exemplary view showing that a three-dimensional pattern is implemented depending on the angle of the decor film manufactured by the method for manufacturing the decor film according to an embodiment of the present invention;
6 is an exemplary view showing the difference between the refractive index and the speed according to Snell's law in the method of manufacturing a decor film according to an embodiment of the present invention;
7 is an exemplary view showing a color resin for UV pattern in the method of manufacturing a decor film according to an embodiment of the present invention,
8 is an exemplary view showing the real image and visible light band transmittance change of the primary mirror (mirror surface) pattern for each color in the method of manufacturing a decor film according to an embodiment of the present invention;
9 is an exemplary view showing the real image and visible ray band transmittance change of the primary + secondary pattern (mirror + trapezoid) for each color in the method of manufacturing a decor film according to an embodiment of the present invention;
Figure 10 shows the VK analysis image of the primary and primary + secondary pattern in the manufacturing method of the decorative film according to an embodiment of the present invention,
11 is an exemplary view showing a design deco film (mobile back cover) to which a multi-layer (laminated) pattern manufactured in the method of manufacturing a deco film according to an embodiment of the present invention is applied,
12 is an exemplary view showing the optical effect and color change for each viewing angle of the decor film manufactured in the method for manufacturing a decor film according to an embodiment of the present invention;
13 is an exemplary view showing the change in appearance according to the refractive index of the UV pattern layer of the decor film manufactured in the method of manufacturing a decor film according to an embodiment of the present invention,
14 is an exemplary view showing changes in appearance (high refractive index ↔ low refractive index) according to the combination of the refractive index of the UV pattern layer of the decoration film manufactured in the method for manufacturing a decoration film according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shapes of elements in the drawings are exaggerated to emphasize a clearer description.

The configuration of the invention for clarifying the solution to the problem to be solved by the present invention will be described in detail with reference to the accompanying drawings based on a preferred embodiment of the present invention, but the same in assigning reference numbers to the components of the drawings For the components, even if they are on different drawings, the same reference numbers are given, and it is noted in advance that the components of other drawings can be cited when necessary in the description of the drawings.

1 is an exemplary view schematically comparing a method for manufacturing a deco film according to the present invention with the prior art, FIG. 2 is a flowchart showing a method for manufacturing a deco film according to an embodiment of the present invention, FIGS. 3 and 4 are this It is an exemplary view schematically showing the lamination order of the decor film manufactured according to the manufacturing method of the decor film according to an embodiment of the present invention.

1 to 4, a method for manufacturing a decor film according to an embodiment of the present invention and a decor film prepared accordingly will be described.

First, the method of manufacturing a decor film according to an embodiment of the present invention includes a base film preparation step, a first UV pattern layer forming step, a second UV pattern layer forming step, a deposition layer forming step, and a color ink layer forming step.

Base film preparation stage

This step is a base film preparation step, and refers to a step of sequentially laminating an adhesive layer and a release film on one surface of the base film.

First, the base film 110 is prepared.

The base film 110 may be made of a PET (polyethylene terephthalate) material. In addition to PET, the base film 110 may be made of a material such as acrylic or PC (polycarbonate).

When the base film 110 of PET material is prepared, the adhesive layer 120 is formed on one surface of the base film 110 in advance.

The adhesive layer 120 may be formed by coating the OCA adhesive on one surface of the base film 110 to a set thickness. Alternatively, the adhesive layer 120 may be formed by laminating an OCA member having a set thickness, that is, an OCA tape on one surface of the base film 110 .

When the adhesive layer 120 is formed on one surface of the base film 110 , the release film 130 is formed on the adhesive layer 120 .

The release film 130 may be made of a PET (polyethylene terephthalate) material.

In this way, the adhesive layer 120 and the release film 130 sequentially stacked on the base film 110 prepared in this step may be referred to as an anti-shattering film.

Here, the hard coating layer 140 may be formed on the other surface of the base film 110 .

First UV pattern layer forming step

This step is a step of forming a first UV pattern layer, and refers to a step of laminating a first UV pattern layer on the other surface of the base film.

In this step, a first UV pattern layer 150 is laminated on the other surface of the base film 110 .

Here, the other surface of the base film 110 refers to a surface opposite to one surface of the base film 110 on which the adhesive layer 120 and the release film 130 are sequentially formed in the previous step (S110).

As a specific example, the first UV pattern layer 150 refers to a layer formed by UV molding to have a predetermined pattern shape, that is, a first pattern shape using a transparent UV pattern molding paint.

Here, the predetermined pattern shape refers to various pattern shapes including a micro lens, a lenticular, a prism, and a hologram pattern, and any UV pattern shape obvious to those skilled in the art may be applied.

Second UV pattern layer forming step

This step is a step of forming a second UV pattern layer, and refers to a step of laminating a second UV pattern layer on the first deposition layer.

After the first UV pattern layer 150 having the first pattern shape P1 is laminated on the other surface of the base film 110 through the previous step, in this step, the second UV pattern layer 150 is formed on the first UV pattern layer 150 . A UV pattern layer 160 is laminated.

As a specific example, the second UV pattern layer 160 has a configuration different from that of the first UV pattern layer 150 formed to have a first pattern shape and a pattern and refractive index.

The second UV pattern layer 160 may be formed to have a second pattern shape different from the first pattern shape.

In addition, the first and second UV pattern layers 140 and 150 are disposed on both sides of the base film 110 one by one, so that the base film 110 is interposed therebetween. 110) is stacked up and down in only one direction through the other surface. Accordingly, a three-dimensional pattern in which two different pattern shapes are stacked up may be implemented to form various three-dimensional aesthetics.

At this time, since a separate deposition layer is not formed between the first and second UV pattern layers 140 and 150, as described above, there is an advantage in that the process time is long, the yield is low, and the problems of high cost can be solved. .

In addition, since the deposition layer 170 and the color ink layer 170 can be sequentially stacked on the second UV pattern layer 160 , a continuous process is possible and productivity can be improved.

Meanwhile, as the second pattern shape, a spin, lenticular, hairline, or lattice pattern shape may be used. In addition, various UV pattern shapes obvious to those of ordinary skill in the art may be used.

Meanwhile, the first pattern shape and the second pattern shape described above may be formed into a moire pattern through moiré pattern molding.

In addition, the second UV pattern layer 160 may have a color different from that of the first UV pattern layer 150 , rather than only having a pattern shape difference from the first UV pattern layer 150 .

To this end, the second UV pattern layer 160 may use a UV molding paint having a set color different from the UV molding paint used to form the first UV pattern layer 150 .

In this way, the second UV pattern layer 160 may have a different pattern shape and a different color from the first UV pattern layer 150 , so as to realize a three-dimensional pattern due to two or more pattern shapes, and at the same time, a UV molding process Through this, even the color aesthetics can be easily realized.

On the other hand, the first UV pattern layer 150 stacked in a plurality of layers or more, the second UV pattern layer 160 has a refractive index difference of at least 0.05 or more for each layer, and is translucent based on R/G/B It is characterized by including color.

Meanwhile, the first UV pattern layer 150 may be configured to have a higher refractive index than the second UV pattern layer 160 , and the first UV pattern layer 150 may be configured to have a lower refractive index than the second UV pattern layer 160 . In the present invention, the first UV pattern layer 150 and the second UV pattern layer 160 are characterized in that the refractive indices of the layer 160 are different from each other. A configuration having a higher refractive index than the second UV pattern layer 160 will be described as an example.

That is, in the decorative film manufactured according to the present invention, the first UV pattern layer 150 is not limited to two pattern layers like the second UV pattern layer 160 , and the refractive index difference for each pattern layer is at least 0.05 or more. It goes without saying that I can be implemented with a plurality of pattern layers.

The first UV pattern layer 150 may be prepared by adding high refractive nanoparticles, pigments, and other additives to an organic polymer as a base, and the second UV pattern layer 160 is an organic polymer as a base and low refractive index. It can be prepared by adding nanoparticles, pigments and other additives. Meanwhile, other additives may include a photocuring agent.

Specifically, organic polymer materials used for UV patterns have a limited range of options regarding refractive index compared to inorganic materials, so it is not easy to make high refractive and low refractive index materials using only organic polymer materials.

On the other hand, in the present invention, in order to prepare a high refractive index and low refractive index UV resin suitable for a multi-layer UV pattern, the refractive index was adjusted through high/low refractive index nanoparticles in an organic polymer material.

First, the UV resin contains 40 wt% to 70 wt% of an organic polymer as a base, and nanoparticles for changing the refractive index, pigments for color development, and other additives may be added thereto.

First, in order to produce a high refractive index resin of 1.60 or more, ZrO ₂ having a particle diameter of 10 to 50 nm among TiO ₂ , ZrO ₂ , which is a material with a high refractive index and a very low light absorption in the visible light region, is 40wt% of the total solid solution content. was prepared by dispersing.

Meanwhile, hereinafter, the first UV pattern layer 150 having a refractive index of 1.60 or more is only a preferred embodiment, and the refractive index of the first UV pattern layer 150 is not limited thereto.

In addition, the low-refractive resin was prepared by dispersing 35wt% of hollow SiO ₂ (hollow silica) nanoparticles having a particle diameter of 80 to 90 nm in the total solid solution content to prepare a low-refractive resin of 1.45 or less.

Meanwhile, hereinafter, the second UV pattern layer 160 having a refractive index of 1.45 or less is only a preferred embodiment, and the refractive index of the second UV pattern layer 160 is not limited thereto.

In addition, a color resin for UV patterns of three primary colors (Magenta, Yellow, Cyan) with excellent color and image quality by dispersing 0.9wt% of the total solid solution content of nano-sized pigments with a diameter of 50 nm or less in common with high and low refractive resins. was able to obtain

In the most preferred embodiment, the refractive index of the high refractive resin may be 1.629, and the refractive index of the low refractive resin may be 1.434.

- Refractive index of the high refractive additive of the first UV pattern layer 150: TiO ₂ (2.54), ZrO ₂ (2.16), ZnS (2.37) -> 2.5~50wt%

- The refractive index of the low refractive additive of the second UV pattern layer 160: F (0.95), Hollow SiO ₂ (1.30 or less) -> 5~45wt%

- Nano-size pigments: diameter of 50 nm or less -> 0.15~6wt%

Deposition layer formation step

This step is a deposition layer forming step, and refers to a step of forming a deposition layer on the second UV pattern layer.

In this step, a first UV pattern layer 150 having a first pattern shape and a second UV pattern layer 160 having a second pattern shape are sequentially stacked through the other surface of the base film 110, and the deposition layer ( 170 is laminated on the second UV pattern layer 160 .

Meanwhile, the deposition layer 170 may be one of an NCVM-deposited multi-silver deposition layer, a multi-color deposition layer, and a multi-tint color deposition layer.

The deposition layer 170 may be a tint color deposition layer deposited to have a tint color using the NCVM method.

The deposition layer 170 may have a transparent or translucent color.

Accordingly, the two pattern shapes of the first and second UV pattern layers 140 and 150, and the different color aesthetics, as well as the deposition layer 170 can implement a complex color, Various and differentiated three-dimensional patterns and color effects can be realized.

Furthermore, since these various and differentiated three-dimensional patterns and color effects can be stacked up only through one side of the base film 110, there is an advantage that continuous production and mass production are possible.

Color ink layer formation step

This step is a step of forming a color ink layer, and refers to a step of forming a color ink layer by printing ink of a set color on the deposition layer 3 to 5 times.

In this step, the color ink layer 170 is formed on the deposition layer 170 .

The color ink layer 170 may be printed 3 to 5 times, and various types of colors may be selected.

For example, the color ink layer 170 may have a black color, and may be background printed using color inks having various other colors.

When the color ink layer 170 is formed through this step, the production of the decorative film 100 having a three-dimensional pattern is completed.

Meanwhile, according to an embodiment of the present invention, a glass structure having a three-dimensional pattern may be formed using the decor film having the three-dimensional pattern described above.

characterization

5 is an exemplary view showing that a three-dimensional pattern is implemented depending on the angle of the decor film manufactured by the method of manufacturing the decor film according to an embodiment of the present invention.

Referring to FIG. 5 , the decorative film according to an embodiment of the present invention can implement various optical effects such as surface texture, depth, color brightness, and saturation according to various angles, and complex three-dimensional overlap between three-dimensional patterns. It can be confirmed that an improved three-dimensional effect can be realized by the effect.

6 is an exemplary view showing the difference between the refractive index and the speed according to Snell's law in the method of manufacturing a decor film according to an embodiment of the present invention.

Referring to FIG. 6 , in the decorative film according to an embodiment of the present invention, Snell's law defines refraction among the phenomena of light occurring at the interface of multiple media having different refractive indices. In the case of this law, it is an important basis for ray tracing in geometric optics that focuses on the direction of light. Judging from this law, which is expressed by the refractive index, incidence, and refraction angles of the two media, it can be confirmed that the larger the difference in refractive index between the primary UV pattern and the secondary UV pattern, the more independent the effect of the pattern formed on each layer is.

That is, in the present invention, the difference in refractive index between the primary UV pattern and the secondary UV pattern is preferably at least 0.05. On the other hand, the larger the difference in refractive index, the better the characteristic, but it may not be easy to give a difference in refractive index of 0.2 or more. However, the maximum refractive index difference of 0.2 is only an example, and the present invention is not limited thereto.

7 is an exemplary view showing a color resin for UV pattern in the method of manufacturing a decor film according to an embodiment of the present invention.

Referring to FIG. 7 , depending on the addition of the pigment, each of the high refractive resin (hereinafter, the first UV pattern layer) and the low refractive resin (hereinafter, the second UV pattern layer) can implement various colors and implement different refractive indexes. .

8 is an exemplary view showing the real image and visible ray band transmittance change of the primary specular (mirror surface) pattern for each color in the method of manufacturing a decor film according to an embodiment of the present invention, and FIG. 9 is an embodiment of the present invention It is an exemplary view showing the real image and visible ray band transmittance change of the primary + secondary pattern (mirror surface + trapezoid) by color in the manufacturing method of the decorative film according to shows the VK analysis images of the 1st order and 1st + 2nd order patterns.

Referring to FIGS. 8 to 10 , a real image of a primary mirror (mirror surface) pattern for each color and transmittance in a visible ray band can be confirmed. In addition, you can check the real image and visible ray band transmittance of the primary + secondary pattern (mirror surface + trapezoid) for each color, and after the primary pattern (mirror surface) and 1st + secondary pattern (mirror surface + trapezoid) are applied You can check the results of VK analysis of

11 is an exemplary view showing a design deco film (mobile back cover) to which a multi-layer (laminated) pattern manufactured in the method of manufacturing a deco film according to an embodiment of the present invention is applied, and FIG. 12 is a deco according to an embodiment of the present invention It is an exemplary view showing the optical effect and color change for each viewing angle of the decor film manufactured in the film manufacturing method, and FIG. 13 is according to the refractive index of the UV pattern layer of the decor film manufactured in the method for manufacturing the decor film according to an embodiment of the present invention It is an exemplary view showing the change in appearance, and FIG. 14 is an exemplary view showing the change in appearance (high refractive index ↔ low refractive index) according to the combination of the refractive index of the UV pattern layer of the decor film manufactured in the method for manufacturing a decor film according to an embodiment of the present invention to be.

11 to 14 , it can be seen that a design deco film to which a multi-layer (laminated) pattern is applied can be seen. Referring to this, the decorative film according to an embodiment of the present invention can implement a complex color with two pattern shapes and different color aesthetics, and through a combination thereof, a very diverse and differentiated three-dimensional pattern and color effect can be implemented.

The above detailed description is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and/or within the scope of skill or knowledge in the art. The written embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed as including other embodiments.

100: deco film
110: base film
120: adhesive layer
130: release film
140: hard coating layer
150: first UV pattern layer
160: second UV pattern layer
170: deposition layer
180: color ink layer

Claims (9)

Laminating a first UV pattern layer on the other surface of the base film;
laminating a second UV pattern layer on the other surface of the first UV pattern layer;
laminating a deposition layer on the other surface of the second UV pattern layer; and
laminating a color ink layer on the other surface of the deposition layer; including,
The decor film manufacturing method, characterized in that the first UV pattern layer and the second UV pattern layer have different refractive indices.
The method of claim 1,
The difference in refractive index between the first UV pattern layer and the second UV pattern layer is a decor film manufacturing method, characterized in that 0.05 to 2.0.
3. The method of claim 2,
Deco film manufacturing method further comprising; sequentially laminating an adhesive layer and a release film on one surface of the base film.
3. The method of claim 2,
The first UV pattern layer and the second UV pattern layer is a decor film manufacturing method having a different color.
3. The method of claim 2,
In the step of laminating the first UV pattern layer,
The first UV pattern layer is a decorative film manufacturing method comprising an organic polymer, nanoparticles, pigments and other additives.
6. The method of claim 5,
In the step of laminating the second UV pattern layer,
The second UV pattern layer is a decorative film manufacturing method comprising an organic polymer, nanoparticles, pigments and other additives.
7. The method of claim 6,
The first UV pattern layer comprises 40wt% to 70wt% of organic polymer, 2.5wt% to 50wt% of high refractive nanoparticles,
The second UV pattern layer is a decorative film manufacturing method comprising 40 wt% to 70 wt% of an organic polymer, 5 wt% to 45 wt% of low-refractive nanoparticles.
8. The method of claim 7,
The high refractive nanoparticles have an average diameter of 10 nm to 50 nm,
The low-refractive nanoparticles have an average diameter of 80nm to 90nm decor film manufacturing method.
9. The method of claim 8,
The first UV pattern layer and the pigment included in the second UV pattern layer have an average diameter of 5 nm to 50 nm.

Images