KR101617868B1 - A colored film having holograms for adhering to glasses and manufacturing method thereof - Google Patents

Abstract

The present invention provides a colored film having a hologram for attaching to a glass window and a manufacturing method thereof, providing a decorative function to a film for attaching to the glass window and manufactured using a method different from a previous patent application by the present applicant. In addition, the objective of the present invention is to provide a security authentication function of a product in addition to the decorative function. To achieve the objective in accordance with the present invention, a colored film for attaching to the glass window is a colored film to be attached to an interior surface of a glass window of a vehicle, a building, or the like, comprising: a base film, a hologram layer, a colored layer film, and an adhered layer. The hologram layer is formed on a further inner side when compared to the base film, and the colored layer film is formed on a further inner side when compared to the hologram layer. The colored layer film is formed on the further inner side when compared to the hologram layer and is colored with visible light transmittance of 50% or less to block light passing through the hologram layer. The adhered layer is formed on a further outer side when compared to the base film to be attached to the interior surface of the glass window.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color film for attaching a window to a hologram,

The present invention relates to a colored film for attaching a window to a window having a hologram and a method for manufacturing the same, and more particularly, to a hologram having a unique shape and color that is externally exposed to enhance esthetics, The present invention relates to a colored film and a method of manufacturing the same.

Conventionally, a variety of functional films have been attached to glass windows of vehicles or buildings. The functions provided by these films include, for example, a function of intercepting ultraviolet rays that may cause skin aging of indoor users, decolorization of indoor articles, discoloration, etc., a function of blocking infrared rays to maintain room temperature, A safety function to prevent the glass from being broken due to an external impact or to prevent scattered glass from scattering, and a function to protect the privacy of the indoor living space using proper coloration. Such a functional film generally has a laminated structure in which various materials are coated between the multilayer films.

As an example of a conventional window-attaching film, Korean Patent Laid-open Publication No. 10-2008-0094307 discloses a film having a substrate layer formed with a heat shielding layer for shielding radiant heat flowing into and out of the room and an adhesive layer capable of adhering to the heat shielding layer Layer, wherein the heat shielding layer and the adhesive layer are dried with a microwave wave. As another example, Korean Patent Laid-Open Publication No. 10-2014-0103461 discloses a film which is attached to a window to block visible light and near-infrared rays, and more particularly to a film which is formed on one surface of a support layer and a support layer, And the shielding layer is a film formed by coating a coating liquid in which inorganic compound particles containing nitrogen are dispersed on one surface of the support layer ".

The above-mentioned conventional functional films provide various functionalities, but they have limitations in providing decorative functions due to the need for ensuring visibility of the window glass itself. The present applicant has proposed a film for attaching a window pane and a method for manufacturing the same, which can provide a decorative effect to the exterior of a vehicle or a building while overcoming the limitations of conventional functional films, -0018279.

Korean Patent Publication No. 10-2008-0094307 Korean Patent Publication No. 10-2014-0103461

The present invention is to provide a decorative film for a window-attaching film, and is intended to provide a colored film for attaching a window pane and a method of manufacturing the same, in a manner different from the previous patent application of the present applicant. Further, the present invention is intended to additionally provide a security authentication function of the product in addition to the decorative function.

In order to achieve the above object, the present invention provides a colored film for attaching to a window pane of a vehicle or a building, the colored film comprising a base film, a hologram layer formed on the inner side of the base film, A coloring layer film formed on an inner side of the hologram layer and colored with a visible light transmittance of 50% or less so as to block light transmitted through the hologram layer; and a coloring layer film formed on an outdoor side of the base film, And an adhesive layer for adhering to the substrate.

The hologram layer may include a hologram pattern layer having an embossment formed of unevenness to form a hologram pattern, a metal deposition layer formed on the hologram pattern layer,

And an adhesive layer formed on the metal deposition layer, wherein the colored layer film is laminated on the adhesive layer.

According to an aspect of the present invention, there is provided a color film for attaching a window pane, including a base film, a hologram layer formed on one side of the base film, and a hologram layer formed on the hologram layer, And a coloring layer colored with a visible light transmittance of 50% or less so as to block light transmitted through the layer.

The colored film for attachment to a window pane is formed on the opposite side of the hologram layer with respect to the base film, and further includes an adhesive layer for adhering to the surface of the window pane and a release paper to be laminated on the surface of the adhesive layer.

The visible light transmittance of the colored layer is 20% to 50%.

According to another aspect of the present invention, there is provided a method of manufacturing a color film for attaching a window pane, including the steps of: forming a hologram layer on one side of a base film; laminating a colored layer film having a visible light transmittance of 50% or less on the hologram layer; Forming an adhesive layer on the other surface of the base film; and bonding the releasing sheet to the adhesive layer, wherein the hologram layer forming step includes the steps of: forming a hologram pattern layer having an embossed pattern; Depositing a metal on the layer, and forming an adhesive layer for adhesion to the colored layer film on the metal deposition layer.

According to the color film for attaching a window pane and the manufacturing method thereof having the hologram of the present invention, it is possible to provide a decorative effect that the conventional functional film can not provide. The hologram exhibited by the colored film for attaching a window pane of the present invention not only provides a decorative effect of a brilliant shape and color to the outside, but also can provide a security authentication function by a hologram. Further, since the effect of the hologram is blocked by the colored layer film laminated on the inner side, visibility in the room can be ensured.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view showing a colored film for attaching a window pane according to a preferred embodiment of the present invention; Fig.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coloring film for a window pane,
FIGS. 3A to 3G are cross-sectional views of a colored film for attaching a window pane in a manufacturing process according to the process flow chart of FIG. 2;
4A to 4D are photographs showing the result of observation of the colored layer film applied to the colored film for attaching a window pane of the present invention with different visible light transmittances.

Hereinafter, a colored film for attaching a window pane and a method of manufacturing the same according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing the structure of a colored film for attaching a window according to a preferred embodiment of the present invention, FIG. 2 is a process flow diagram showing a method of manufacturing a colored film for attaching a window according to a preferred embodiment of the present invention, 3a to 3g are cross-sectional views of a colored film for attaching a window pane in a manufacturing process according to the process flow chart of FIG.

Hereinafter, with reference to these drawings, the structure of the colored film 10 for attaching a window pane of the present invention will be described in the order of its manufacturing process.

The colored film (10) for attaching a window pane of the present invention has a base film (11). The base film 11 is a film made of various plastic materials having transparency, and may be, for example, a PET (polyethylene terephthalate) film. (Meth) acrylic resin, polyvinyl chloride (PVA) resin, polyether sulfone resin, polycarbonate resin, polyamide resin, polyimide resin, polyolefin resin, Based resin, a polyvinylidene chloride-based resin, a polystyrene-based resin, a polyvinyl alcohol-based resin, a polyallylate-based resin, and a polyphenylene sulfide-based resin.

A hologram layer 12 is formed on one surface of the base film 11, which is placed on the both sides of the base film 11 in the indoor direction, to form a hologram having a brilliant shape and color (S10). The hologram is a brilliant image that is realized by optical phenomena such as diffraction of light and interference, and it has been used as a product security and authentication means since it can not be duplicated or imitated. Holograms for such authentication purposes are widely used in credit cards, passports, and ID cards. In addition to security and authentication purposes, it is also used for labels and product packaging to enhance the brand image of high-end products. The hologram of the present invention is embodied in a film for attaching a window so that the film for attaching a window can have a brilliant appearance. In addition, the hologram embodied in a film for attaching a window can be provided with a product security authentication function like a conventional hologram label.

The hologram layer 12 includes a hologram pattern layer 12a formed on one surface of the base film 11 (S11) (see Fig. 3A). The hologram pattern layer 12a may be formed of a vinyl-based, acrylic-based, melamine-based, epoxy-based resin, or photopolymerizable resin. The layer may be formed of a polycarbonate resin, A thermoplastic resin such as a polystyrene resin and a polyvinyl chloride resin or a thermoplastic resin such as an unsaturated polyester resin, a melamine resin, an epoxy resin, a urethane acrylate, a polystyrene acrylate, an epoxy acrylate, a polyacrylate, a melamine acrylate and a triazine acrylate A thermosetting resin and a thermoformable resin having a radical polymerization unsaturated radical, and may be coated by a general printing method such as direct gravure, reverse gravure, offset, or the like.

A hologram-shaped embossing is formed in the hologram pattern layer 12a (S12) (see Fig. 3B). In the embossing process, an embossing roll is formed by winding a shim engraved with a hologram pattern on a roll, and the hologram shape is recorded by contacting the original plate with heat and pressure on the hologram pattern layer 12a.

On the other hand, in order to be embossed into a resin material such as a vinyl, acrylic, melamine, epoxy or photopolymer resin which is a material of the holographic pattern layer 12a, considerably high temperature and high pressure conditions are required. Accordingly, a deviation may occur in the process of embossing. In order to solve this problem, a sensing mark can be inserted into the hologram original plate used in the embossing process. The sensing mark may include a method of photographing and inscribing a white pattern using laser light, and a method of making a specific position white by etching a hologram nickel plate with strong base or strong acid such as ferric chloride. The sensing marks are embossed in the hologram pattern layer 12a to form identification patterns, and the identification patterns are provided for each patch of the hologram, thereby serving as a reference point for determining a specific position.

A metal deposition layer 12b is formed on the holographic pattern layer 12a (S13) (see Fig. 3C). As the deposited metal, any one selected from the group consisting of Al, Cu, Ag, Au, Ni, Ti, Cr, and Fe may be used. The metal deposition layer 12b is preferably made of aluminum (Al) having a low cost and high reflectance.

The metal deposition layer 12b is left with only the portion where the hologram is formed and the other portion is removed (S14). For this purpose, an etching mask M for patterning the metal deposition layer 12b is formed (see FIG. 3D). The etching mask M is formed on the portion where the hologram is formed and opened in the portion to be removed. The metal deposition layer 12b under the open portion of the etching mask M is etched away to become the patterned metal deposition layer 12b '(see FIG. 3E). The patterned metal deposition layer 12b 'may have a product brand or logo shape. Or may have a certification mark for product certification. Unlike the present embodiment, when the metal deposition layer 12b is not patterned, a hologram effect can be given over the entire surface of the windowpane attaching film 10. When the metal deposition layer 12b is made of aluminum (Al), aluminum is easily etched into an aqueous alkali solution, so that an alkaline aqueous solution is preferable as the etching solution. Specifically, aluminum reacts in an alkali solution such as KOH or NaOH as follows to release hydrogen.

2Al + 2NaOH + 6H2O2Na [Al (OH) 4] + 3H2

2Al + 2KOH + 6H2O2K [Al (OH) 4] + 3H2

Thus, an appropriate etching solution can be selected according to the components of the metal deposition layer 12b. The etching mask M can select a material which has not reacted with the etching liquid. In the case of aluminum applied to an alkali reaction, the etching mask M may be a ceramic or a polymer material having a high etching resistance to the alkali aqueous solution.

An adhesive layer 12c is formed on the patterned metal deposition layer 12b 'and the holographic pattern layer 12a exposed thereby (S15) (see FIG. 3F). The adhesive layer 12c is a layer containing a binder resin. As the binder resin, any of a thermoplastic resin, a thermosetting resin, a photo-curable resin, and an ultraviolet curable resin may be used. As the thermoplastic resin, a polyethylene resin, a polypropylene resin, a polycarbonate resin, an acrylic resin, a polystyrol resin, or the like can be used. As the thermosetting resin, an unsaturated polyester resin, a phenol resin, an epoxy resin, an acrylic resin, a urethane resin, a melamine resin, a urea resin, a polycarbonate resin and the like can be used. Examples of the photo-curing resin or the ultraviolet-curing resin include at least one selected from a urethane acrylate resin, a polyester acrylate resin, an unsaturated polyester resin, a silicone acrylate resin and an epoxy acrylate resin, A photoinitiator and the like may be used. If necessary, a curing agent, a curing accelerator, a binder, a surface conditioner, a dye, a plasticizer, an ultraviolet absorber, and a light stabilizer may be mixed with the resin. These resins may be copolymers or may be heterogeneous resin mixtures.

The colored layer film 13 is laminated on the adhesive layer 12c (S20) (see Fig. 3F). The colored layer film 13 functions to block strong light incident from the outside and to transmit only a part thereof. The detailed function will be described later. The colored layer film 13 may be a film made of various plastic materials, for example, a PET (polyethylene terephthalate) film. In addition to the above, it is possible to use a polyester resin such as polyethylene naphthalate, an acetate resin, a polyether sulfone resin, a polycarbonate resin, a polyamide resin, a polyimide resin, a polyolefin resin, a (meth) Based resin, a polyvinylidene chloride-based resin, a polystyrene-based resin, a polyvinyl alcohol-based resin, a polyallylate-based resin, and a polyphenylene sulfide-based resin.

A protective layer 14 is formed on the other surface of the colored layer film 13 (S30) (see FIG. 3F). The protective layer 14 is a layer formed to protect the surface from external impact or scratches. Examples of the material that can be used for the protective layer 14 include a thermosetting resin, a thermoplastic resin, a photocurable resin, and an ultraviolet ray curable resin. As the thermosetting resin, for example, a polycarbonate resin, an acrylic resin, a polyester resin, a phenoxy resin, an epoxy resin, a polyolefin resin and the like can be used. As the thermoplastic resin, a polyethylene resin, a polypropylene resin, a polycarbonate resin, an acrylic resin, a polystyrol resin, or the like can be used. Examples of the photo-curable resin or the ultraviolet-curing resin include at least one selected from a urethane acrylate resin, a polyester acrylate resin, an unsaturated polyester resin, a silicone acrylate resin, and an epoxy acrylate resin, A photoinitiator thereof and the like may be used. These resins may optionally contain a curing agent, a curing accelerator, a binder, a surface conditioner, a pigment, a plasticizer, an ultraviolet absorber, a light stabilizer, and the like. The resin may be a copolymer or a mixture of different resins. Further, when a photo-curing resin or an ultraviolet-curable resin is used, it is preferable to perform the curing treatment after molding since better moldability can be ensured.

The adhesive layer 15 is formed on the other surface of the base film 11 (S40) (see Fig. 3G). As the material of the adhesive layer 15, any material having transparency can be used without particular limitation. Specific examples thereof include a rubber such as an acrylic polymer, a silicone polymer, a polyester, a polyurethane, a polyamide, a polyvinyl ether, a vinyl acetate / vinyl chloride copolymer, a modified polyolefin, an epoxy, a fluorine, a natural rubber, Can be appropriately selected and used as the base polymer. In particular, an acrylic pressure-sensitive adhesive is preferable in that it has excellent optical transparency, exhibits adhesive properties such as appropriate wettability, cohesiveness and adhesiveness, and is also excellent in weather resistance and heat resistance. The adhesive layer 15 may contain a crosslinking agent depending on the base polymer. The adhesive layer 15 is usually formed of a base polymer or a pressure sensitive adhesive solution in which the composition is dissolved or dispersed in a solvent. As the solvent, it is preferable to select an appropriate solvent according to the type of the pressure-sensitive adhesive such as an organic solvent such as toluene or ethyl acetate.

On the other surface of the adhesive layer 15, a release film 16 for protecting the release film 15 is attached (S50) (see FIG. 3G). The release film 16 provides the function of protecting the adhesive layer 15 during the transportation process before attaching the window pane attachment film of the present invention to the window pane. That is, the film for attaching the windshield is used by removing the release film 16 and attaching the adhesive layer 15 to a window to be used. The release film 16 may be made of a synthetic resin or the like. The synthetic resin may be a polyolefin resin, a polyester resin, a vinyl chloride resin, or the like. The releasing film 16 may be coated with a release treating agent. As the peeling treatment agent, a silicone resin, an alkyd resin, or the like can be used.

The colored film 10 for attaching a window pane, which is completed by the above-described process, is attached to one side of the room side of the glass window G to be used. That is, the release film 16 is removed and attached to the glass window G through the adhesive layer 15 (see FIG. 1). When a glass window G is observed outdoors, a hologram shining in a brilliant color and a shape represented by the hologram layer 12 can be seen. On the other hand, when observed in a room, scattered diffracted light in the hologram layer 12 is reflected on a colored layer film 13), so that the effect of the hologram does not appear and the outside is clearly visible.

Little if more detail, the light L incident from outside is a patterned metallization layer that some L _r1 from (12b ') is reflected back to the outside represents a hologram, a different part of L _r2 is diffracted, scattered transmitted toward the interior However, the coloring layer film 13 is blocked to a considerable extent and the hologram is not visible in the room. It is preferable that the colored layer film 13 is colored so as to block most light diffracted and scattered in the patterned metal vapor deposition layer 12b '.

Table 1 shows the results of experiments on the degree of blocking of the hologram in the room according to the visible light transmittance (VLT) of the colored layer film 13.

VLT 70% 50% 35% 20% Number of hologram spots Outdoor side Indoor side Blocking rate Outdoor side Indoor side Blocking rate Outdoor side Indoor side Blocking rate Outdoor side Indoor side Blocking rate 500 200-300 40 to 60% 500 100 to 150 70 to 80% 500 20 ~ 30 94 to 96% 500 0 100%

In this experiment, two films of 500 hologram spots were prepared in a square of 50 mm in width and 50 mm in length. One film was placed at the outer side and the other was placed at the side of the film to show the inside of the film. The number of hologram spots observed in each of the three-wavelength lamps when irradiated from a distance of about 30 cm is recorded. In addition, the number of hologram spots blocked on the indoor side is compared with the number of hologram spots observed on the outdoor side, and the percentage (blocking rate) is recorded. This experiment was repeated while changing the visible light transmittance (VLT) of the colored layer film 13 to 70%, 50%, 35% and 20%.

According to the experimental results, when the visible light transmittance (VLT) of the colored layer film 13 is 70%, 500 hologram spots are observed on the outdoor side, and 200 to 300 hologram spots are observed on the indoor side 4a). A considerable number of hologram spots are still observed in the room, and the visibility in the room is poor due to the glare caused by the shiny hologram.

When the visible light transmittance (VLT) of the colored layer film 13 is 50%, 500 hologram spots are observed on the outdoor side, and 100 to 150 hologram spots are observed on the indoor side (see Fig. 4B). A large part of the hologram spot is blocked and the visibility is improved.

When the visible light transmittance (VLT) of the colored layer film 13 is 35%, 500 hologram spots are observed on the outdoor side, and 20 to 30 hologram spots are observed on the indoor side (see Fig. Almost all hologram spots are blocked and only a few hologram spots are visible when viewed indoors.

When the visible light transmittance (VLT) of the colored layer film 13 is 20%, 500 hologram spots are observed on the outdoor side, whereas no hologram spots are visible in the room (see Fig. 4D).

According to these experimental results, it is preferable that the visible light transmittance (VLT) of the colored layer film 13 is 50% or less in order to prevent the indoor user's view from being disturbed due to the sparkling of the hologram or the like. However, if the visible light transmittance (VLT) is significantly low, all the incident light from the outside is blocked and the outside is not visible at all. According to the experimental results, if the visible light transmittance (VLT) of the colored layer film (13) is 20%, all the hologram spots are blocked, and the visible light transmittance (VLT) of the colored layer film (13) It is preferable to select an appropriate value according to the necessity of the use environment or use.

On the other hand, the same effect as that of the present embodiment can be obtained by using a transparent film instead of the colored layer film 13 and adding a colored pigment to the adhesive layer 12c and the protective layer 14, unlike the present embodiment. In other words, any other type of colored layer capable of blocking light incident into the room through the hologram layer 12 may be formed on the inner side of the patterned metal vapor deposition layer 12b ' Bar can be achieved.

The colored film for attaching a window pane having the hologram of the present invention can provide a decorative effect that the conventional functional film can not provide. The hologram exhibited by the colored film for attaching a window pane of the present invention not only provides a decorative effect of a brilliant shape and color to the outside, but also can provide a security authentication function by a hologram. In addition, the effect of the hologram is blocked by the coloring layer film laminated on the inside of the room, and is not visible in the room, thus ensuring visibility in the room.

10: colored film for glass window
11: base film
12: Hologram layer
13: colored layer film
14: Protective layer
15: Adhesive layer
16: release film
M: Etching mask
G: Windshield

Claims (7)

BACKGROUND ART [0002] As a colored film to be used by being attached to a side surface of a glass window in a vehicle or a building,
A base film,
A hologram layer formed on the inner side of the base film,
A coloring layer film formed on the hologram layer side of the hologram layer and colored to have a visible light transmittance of 50% or less so as to block light transmitted through the hologram layer;
And an adhesive layer formed on the outdoor side of the base film and for adhering to the indoor side surface of the window pane,
Wherein the hologram layer comprises a hologram pattern layer having an embossment formed of unevenness to form a hologram pattern, a metal deposition layer formed on the hologram pattern layer, and an adhesive layer formed on the metal deposition layer. delete A base film,
A hologram pattern layer formed on the inner side of the base film and having an embossed concavity and convexity to form a hologram pattern;
A metal deposition layer formed on the holographic pattern layer,
An adhesive layer formed on the metal deposition layer,
A transparent film laminated on the adhesive layer,
A protective layer formed on the transparent film,
And a coloring layer formed by adding a coloring pigment to the adhesive layer or the protective layer so as to block light transmitted through the metal deposition layer. delete The method of claim 3,
Wherein the colored layer has a visible light transmittance of 20% to 50%. Forming a holographic pattern layer having embossed on one side of the base film,
Depositing a metal on the holographic pattern layer;
Forming an adhesive layer on the metal deposition layer;
Forming a colored layer film colored with a visible light transmittance of 50% or less on the adhesive layer;
Forming an adhesive layer on the other surface of the base film,
And a step of laminating a release paper to the pressure-sensitive adhesive layer.
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