KR101973521B1 - Decoration film for cellular phone and manufacturing method thereof - Google Patents

Abstract

A mobile phone decoration film and a manufacturing method thereof are provided. A cell phone decoration film and a method of manufacturing the same according to an embodiment of the present invention include a step of preparing a first film, a gravure printing process using a gravure roll whose surface is smooth on the base film, and a color tint layer Forming a color tint layer by printing a forming composition, forming a pattern layer by a gravure printing process using a gravure roll having formed on the color tint layer an intaglio groove of predetermined shape or shape on the surface, Forming a metal decorating layer by printing a composition for forming a metal decorating layer including a metal particle in a gravure printing process using a gravure roll having a smooth surface and producing a thermoelectric converting film; And thermo-compression bonding the thermoelectric conversion film on the thermosetting film. According to this, it is possible to simplify the film manufacturing process for the cellular phone decoration, reduce the processing time, and improve the aesthetics.

Description

Technical Field [0001] The present invention relates to a film for cellular phone decoration and a manufacturing method thereof,

The present invention relates to a film, and more particularly, to a film for cell phone decorating and a method of manufacturing the same.

Recently, various designs of mobile phones and smart phones (hereinafter referred to collectively as "mobile phones") have been released with the development of mobile phone and smartphone technologies.

Such a cellular phone is constituted by a case constituting an external appearance and various circuit components mounted inside the case to perform the function of the cellular phone. Among them, the cellular phone case is usually made of synthetic resin and has a low hardness, so scratches such as scratches easily occur due to an external impact.

Accordingly, in recent years, not only the protection of the mobile phone product but also the technology of the mobile phone film for improving the aesthetics have been actively developed. Cell phone films are demanded variously for color, luster, and pattern (ie, pattern) of film to suit the taste of the modern person with various personality.

Korean Patent Laid-Open Publication No. 2013-0052430 discloses an epoxy protective film for mobile phones and a method for producing the same. The method for manufacturing an epoxy protective film for mobile phones comprises the steps of preparing a transparent sticker fabric used as a normal transparent film of a mobile phone, performing a normal UV coating on the transparent sticker fabric after normal UV offset printing, Applying the epoxy resin to one side of the transparent film, transferring the transparent film coated with the epoxy resin to a heat drier, and heat-treating the film at 30 to 45 캜 for 8 to 12 hours to produce an epoxy protective film by bonding an epoxy resin to the transparent film , Cooling the epoxy protective film at room temperature for 4 to 6 hours, removing the epoxy protective film from the dryer to complete an epoxy protective film, and separately packaging the epoxy protective film.

However, in the case of the above-described conventional technique, a UV coating is performed after the UV offset printing, the ink image is transferred onto the blanket on the printing plate surface, the printing is performed again on the adherend, and a separate UV irradiation device is indispensably required. In addition, since the process includes a separate heat treatment and drying process, the process is complicated and takes a long time. In addition, the conventional epoxy protective film for mobile phones has a disadvantage of low esthetics.

Patent Document: Korean Patent Publication No. 2013-0052430

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a film for cell phone decoration and a method for manufacturing the same, which can simplify the process, reduce the process time and improve the aesthetics.

According to an aspect of the present invention, there is provided a method of manufacturing a film for cell phone decoration, the method comprising: preparing a first film; Printing a color tint layer forming composition including a dye and a binder in a gravure printing process using a gravure roll having a smooth surface on the base film to form a color tint layer; Forming a pattern layer by a gravure printing process using a gravure roll having formed on the color tint layer a depression groove of predetermined shape or shape on the surface; Printing a metal decorating layer-forming composition including metal particles by a gravure printing process using a gravure roll having a smooth surface on the pattern layer to form a metal decorating layer to produce a thermoelectric conversion film; And thermally pressing the thermoelectric conversion film on the second film by performing a thermal transfer process.

In addition, in the step of thermocompression bonding, when the thermoelectric conversion film is subjected to heat and pressure only at a predetermined pattern portion, the thermoelectric conversion film may be formed on the second film with a pattern have.

In addition, the metal decorating layer forming composition may include core-shell particles including a spherical metal core and a transparent insulating layer shell disposed around the metal core.

Further, the thermal transfer step may be performed at a pressure of 260 kgf / mm ² or less and a temperature of 60 to 110 ° C at a rate of 0.1 to 2.0 inch / sec.

Another aspect of the present invention provides a film for cell phone decoration. The film for decorating a cell phone is manufactured by a method for manufacturing a film for decorating a cell phone of the present invention.

INDUSTRIAL APPLICABILITY According to the film for decorating a cellular phone and the method of manufacturing the same of the present invention, it is possible to simplify the manufacturing process of a film for cell phone decoration, reduce the processing time, and improve the esthetics.

1 is a flowchart showing a method of manufacturing a film for cell phone decoration according to an embodiment of the present invention.
2 is an image showing a gravure printing apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of a core-shell particle according to an embodiment of the present invention.
FIG. 4 is a perspective view illustrating a configuration of a thermal transfer printing apparatus according to an exemplary embodiment of the present invention.
5 is a cross-sectional view of a film for cell phone decoration according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

1 is a flowchart showing a method of manufacturing a film for cell phone decoration according to an embodiment of the present invention.

Referring to FIG. 1, a method for manufacturing a cell phone decoration film according to an embodiment of the present invention includes preparing a first film (S100), forming a color tint layer on the first film (S200) Forming a patterned layer on the color tint layer (S300); forming a metal decoration layer on the patterned layer to manufacture a thermoelectric conversion film (S400); and performing a thermal transfer process on the second film And thermo-compression bonding the thermoelectric conversion film (S500).

The step of preparing the first film (S100) will be described.

The first film can be used as an adherend of a gravure printing process, and can be used without limitation as long as it is a conventional film having a function of protecting a cellular phone. Further, in contrast to the thermal transfer process described below, it is preferable that the first film is made of a material having excellent heat resistance. For example, the first film may be formed of at least one selected from the group consisting of polypropylene (PP), polyethylene (PE), polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), polyoxymethylene (PA), polypropylene oxide (PPO), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethylmethacrylate (PMMA), polytetrafluoroethylene At least one selected from the group consisting of polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polyimide (PI), polyamide- imide (PAI), and polyethyleneimine , And most preferably PET.

Next, a step S200 of forming a color tint layer on the first film will be described.

The color tint layer may be formed through a gravure printing process using a gravure roll whose surface is smooth on the first film. The color tint layer forming composition used herein includes a dye and a binder. Since the color tint layer is formed by the gravure printing process, there is no need for a separate heat treatment and drying process, so that the process can be simplified and the process time can be reduced.

The dye may include at least one red dye of the group selected from the group consisting of Magenta VP, MS Red G, Macrolex Red Violet R, and MS Magenta HM-1450, and Waxoline Yellow GFW, Kayaset Yellow GN, Brillinat Yellow 6GL, and may further comprise at least one blue dye selected from the group consisting of Kayaset Blue 714, Waxoline Blue AP-FW, and MS Cyan HM-1238. Based dye. However, the dyes usable as the dyes are not limited, and dyes capable of exhibiting a predetermined hue in a mobile phone film can be used without limitation.

The binder may be a resin material having a predetermined adhesion property. By using the material having adhesiveness, the bonding force between the first film and the pattern layer or the metal decorating layer described later can be improved without using a separate adhesive layer. Wherein the binder is selected from the group consisting of an epoxy resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyester resin, a polyvinyl chloride resin, a polyvinyl acetate resin, a petroleum resin, a polystyrene resin, And a resin.

Next, the step of forming a pattern layer (S300) on the color tint layer will be described. The pattern layer may be formed by printing a pattern layer forming composition using a gravure printing process using a gravure roll having a predetermined concave or convex shape on the surface thereof. The pattern layer thus formed has a predetermined pattern and has a concavo-convex cross section. When the pattern layer is formed as described above, a variety of design expressions are possible, thereby improving the aesthetics.

The pattern layer forming composition may comprise a binder material. Wherein the binder material is selected from the group consisting of an epoxy resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyester resin, a polyvinyl chloride resin, a polyvinyl acetate resin, a petroleum resin, a phenol resin, Based resin, and a urethane-based resin. A pattern layer forming composition containing a binder material is filled in a gravure roll having a depressed groove formed on the surface thereof to perform a gravure printing process. Accordingly, the pattern layer can be formed immediately without any additional curing process, thereby simplifying the process and reducing the processing time.

At this time, if the pattern layer forming composition contains the same material as the binder material used for the color tint layer, the interface characteristics between the color tint layer and the pattern layer can be improved to prevent the layer separation phenomenon.

2 is an image showing a gravure printing apparatus according to an embodiment of the present invention.

Referring to FIG. 2, a gravure printing apparatus according to an embodiment of the present invention includes a gravure roll 10, an ink filling unit 20, a doctor blade 30, and a pressure roll 40.

The gravure roll 10 has a cylindrical shape, and a predetermined pattern or shape pattern engraved groove 1 is formed on the surface.

The ink filling portion 20 has a predetermined shape in which an upper surface is opened and a liquid can be contained. The pattern layer forming composition (2) is filled in the ink filling part (20).

The doctor blade 30 is located at an end portion of the gravure roll 10 in contact with a portion of the surface of the gravure roll 10 to remove the pattern layer forming composition 2 applied to the surface of the gravure roll 10.

The pressure roll 40 has a cylindrical shape and has a predetermined weight so as to apply pressure to the release film 2 together with the gravure roll 10.

2, when the gravure roll 10 is rotated, a portion of the pattern layer forming composition 2 filled in the ink filling portion 20 is partially transferred to the engraved groove 1 of the gravure roll 20, . Thereafter, the rotation of the gravure roll 10 proceeds in a state where the doctor blade 30 is in contact with the surface of the gravure roll 10. Accordingly, the pattern layer forming composition is filled in the intaglio groove 1 by the rotation of the gravure roll 10, and at the same time, the pattern layer forming composition remaining on the surface of the gravure roll 10 is removed. Thereafter, the pattern layer forming composition filled in the intaglio groove 1 of the gravure roll 10 is transferred onto the release film 3 by the pressure of the pressure roll 40. Thus, a pattern layer having a concavo-convex shape in a predetermined pattern is formed on the color tint layer.

Next, a step S400 of forming a thermoelectric conversion film by forming a metal decoration layer on the pattern layer will be described.

The metal decorating layer is a layer that improves the aesthetics of the film for cell phone decoration by adjusting transmittance or reflectance as containing the metal. The reflectance of the metal decorating layer may be 30% or more, and may have a thickness of 400 Å or less. If the reflectance of the metal decoration layer is less than 30%, the aesthetics of the decoration film for a mobile phone may be deteriorated. If the thickness of the metal decorating layer is more than 400 ANGSTROM, the thickness of the film may become thick and the reflectance may be deteriorated to deteriorate the aesthetics.

The metal decorating layer is formed through a gravure printing process using a gravure roll whose surface is smooth on the color tint layer. At this time, the composition used in the gravure printing process is a metal decorating layer-forming composition including metal particles. The metal decorating layer forming composition may include metal particles and a binder material.

The metal particles may include at least one selected from the group consisting of Al, Cu, and Ti, and most preferably Al.

The binder material may be at least one selected from the group consisting of an epoxy resin, an acrylic resin, a polyolefin resin, a polyamide resin, a polyester resin, a polyvinyl chloride resin, a polyvinyl acetate resin, a petroleum resin, , And a urethane-based resin.

In this case, the binder material contained in the composition for forming a metal decorating layer may be a binder material included in the color tint layer forming composition or the pattern layer forming composition described above. In this case, the color tint layer or the interfacial property between the pattern layer and the metal decorating layer can be improved.

In the metal decorating layer-forming composition, the metal particles may be in the form of a core-shell particle comprising a spherical metal core and a transparent insulating layer shell disposed around the metal core.

3 is a cross-sectional view of a core-shell particle according to an embodiment of the present invention.

Referring to FIG. 3, the core-shell particle according to an embodiment of the present invention includes a spherical metal core 2 and a transparent insulating layer shell 1 disposed around the metal core 2.

In the case of incorporating a metal material into a conventional mobile phone film, the film is made conductive by the metal material, and the electric wave is not passed. Which may affect antenna signal reception or static transmission, and may further cause failure of the electronic device.

The metal decorating layer of the film for cell phone decoration according to an embodiment of the present invention includes a spherical metal core 2 and a transparent insulating layer shell 1 disposed around the metal core 2, . Thus, by controlling the transmittance or the reflectance as well as the conventional metal particles, it is possible to pass a radio signal such as an antenna signal of a cellular phone by improving the stability of the mobile phone by extending the lifetime.

The spherical metal core 2 may include at least one selected from the group consisting of Al, Cu, and Ti, and most preferably Al.

The transparent insulating layer shell 1 may be formed by applying a transparent insulating liquid onto the core 2 and coating the same. The transparent insulating layer may include at least one selected from the group consisting of photoacrylic, propylene glycol, transformer oil, SiN _x , and SiO ₂ , and the conductive layer is a non-conductive layer having a conductivity value of 0. The light transmittance of the transparent insulating layer shell may be 90% or more. When the light transmittance is 90% or more, the transmittance or reflectance of the metal can be controlled. In addition, when the light transmittance is less than 90%, the transmittance or reflectance control effect of the metal may be deteriorated, so that the improvement of the aesthetics of the film may be limited.

The metal-transparent insulating layer core shell particles may include 50 to 90% by weight of the core and 10 to 50% by weight of the shell. When the weight of the core is less than 50 wt%, the light transmittance is lowered and the improvement of the aesthetic property is limited. When the weight of the core is less than 90 wt%, the weight ratio of the transparent insulating coating layer is relatively small The insulation effect may be deteriorated.

If the total weight of the metal-transparent insulating layer core shell particles is less than 10% by weight, the insulating effect may be deteriorated. When the weight of the core is less than 50% by weight, Improvement may be limited.

As the metal decorating layer is formed, a thermoelectric conversion film is produced.

Next, a description will be given of a step (S500) of thermally pressing the thermoelectric conversion film on the second film by performing a thermal transfer process.

The second film may be at least one selected from the group consisting of ABS, PP, PS, SAN, PE, PET, nylon, and PVC.

The second film may be a form in which a releasing material is coated on one side or an adhesive material is contained in the film so that the second film can be easily separated when applied to an electronic apparatus. Thus, after the step of thermocompression described later, the second film can be easily removed. The adhesive material used in this case can be used without limitation as long as it is an adhesive material used in a conventional release film.

The thermoelectric conversion film may be positioned such that the surface on which the decoration layer is formed faces the second film during the thermal transfer process.

FIG. 4 is a perspective view illustrating a configuration of a thermal transfer printing apparatus according to an exemplary embodiment of the present invention.

4, a thermal transfer printing apparatus according to an embodiment of the present invention includes a thermal transfer head 10, a thermal transfer head nozzle 11, a platen roller 12, and a transfer unit 13, The conveying unit 13 may include a motor 14, a driving roller 15, a driven roller 16, and a second film sensor 17.

The thermal transfer head (10) applies heat to the second film and the thermoelectric conversion film transferred by the transfer section (13). The platen roller 12 supports the second film so that the second film and the thermoelectric conversion film are opposed to the thermal transfer head 10 so that the second film and the thermoelectric conversion film can be thermocompression bonded, .

The motor 14 is a driving source for supplying the second film to be printed with the thermal transfer film to the thermal transfer head 10. The driving roller 15 is driven by a pattern input device (not shown) And transfers the second film and the thermoelectric conversion film while rotating in engagement with the motor (14) along the shape. The driven roller 16 rotates in engagement with the driving roller 15 with the second film interposed therebetween, and feeds the second film and the thermoelectric conversion film. At this time, the second film sensor 17 detects the position along the pattern shape inputted on the second film.

The thermal transfer film may have a predetermined pattern on the second film as heat and pressure are applied to only a predetermined pattern portion.

At this time, the thermal transfer process may be performed at a pressure of 260 kgf / mm ² or less and a temperature of 60 to 110 ° C at a rate of 0.1 to 2.0 inch / sec.

When the pressure during the thermal transfer process is 260 kgf / mm < ^{2 >} , The reaction stability is deteriorated and the thermal transfer film can be thermally pressed unevenly. If the temperature during the thermal transfer is less than 60 ° C, the bonding force between the second film and the composite thermoelectric conversion film may be weakened. If the temperature exceeds 110 ° C, the thermal transfer film may be unevenly thermally pressed. In addition, if the speed of the thermal transfer process is less than 0.1 inch / sec, the process efficiency may be lowered, and if the speed is more than 2.0 inch / sec, the thermal transfer film may be unevenly thermally pressed.

The film for decorating a mobile phone manufactured by the method of manufacturing a film for decorating a mobile phone according to an embodiment of the present invention can produce a film for decorating a mobile phone having excellent aesthetic and tactile properties through a simple process. Further, a film having excellent interlayer adhesiveness can be produced without a separate adhesive layer.

5 is a cross-sectional view of a film for cell phone decoration according to an embodiment of the present invention.

Referring to FIG. 5, a cell phone decorating film produced by the method for manufacturing a cell phone decorating film of an embodiment of the present invention as described above is disposed on the first film 100, the first film 100 , A color tint layer (200) comprising a dye and a binder. The color tint layer may include a pattern layer 300 having a predetermined pattern or shape on the color tint layer, a metal decorating layer 400 disposed on the pattern layer and including metal particles, And a second film 500 disposed on the second substrate 500.

Since the film for decorating a mobile phone includes the color tint layer 200, the pattern layer 300, and the metal decorating layer 400, a variety of designs can be expressed by improving the aesthetic and tactile properties.

In addition, when applied to a mobile phone, the film for decorating a mobile phone can be cut and used in accordance with the size of a mobile phone. At this time, the second film may be released and attached to a mobile phone.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: transparent insulating layer shell 2: metal core
10: thermal transfer head 11: thermal transfer head nozzle
12: Platen roller 13: Feeder
14: motor 15: drive roller
16: driven roller 17: second film sensor
100: first film 200: colored tint layer
300: pattern layer 400: metal decorating layer
500: Second film

Claims (5)

Preparing a first film;
Printing a color tinted layer forming composition on the first film to form a color tinted layer;
Forming a pattern layer on the color tint layer;
Printing a metal decorating layer forming composition containing metal particles on the pattern layer to form a metal decorating layer to produce a thermoelectric conversion film; And
And thermo-compressing the thermoelectric conversion film on the second film by performing a thermal transfer process,
Wherein the thermoelectric converting film is formed on the second film with a pattern as heat and pressure are applied only to a predetermined pattern portion in the thermo-compression process, A method for manufacturing a film for decoration. delete The method according to claim 1,
Wherein the metal decorating layer-forming composition comprises core-shell particles comprising a spherical metal core and a transparent insulating layer shell disposed around the metal core. The method according to claim 1,
In the thermal transfer step,
A pressure of 260 kgf / mm ² or less and a temperature of 60 to 110 ° C at a rate of 0.1 to 2.0 inch / sec. A cell phone decorating film produced by the method for manufacturing a cell phone decorating film according to any one of claims 1, 3, and 4.

Images