KR20220083107A - Manufacturing method of mobile phone decoration film containing heat dissipation material and mobile phone decoration film manufactured through the same - Google Patents

Abstract

The present invention in a cell phone decoration film containing a heat dissipation material, in the manufacturing method of the cell phone decoration film, comprising the steps of: preparing a base film layer; forming a tint printing layer by MDD (Micro Dry Process Decoration) using an ink containing a heat dissipation material on the lower side of the base film layer; forming a UV pattern printing layer under the tint printing layer; forming a deposition layer under the UV pattern printing layer; And it discloses a method for manufacturing a mobile phone decoration film comprising the step of forming a silk printing layer disposed below the deposition layer, and a mobile phone decoration film manufactured through this method.

Description

Manufacturing method of a mobile phone decoration film containing a heat dissipation material, and a mobile phone decoration film manufactured through the same

The present invention relates to a method for manufacturing a mobile phone decoration film containing a heat-dissipating material and a mobile phone decoration film manufactured through the same.

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

Such a mobile phone is composed of a case constituting the exterior and various circuit components mounted inside the case to perform the original function of the mobile phone. Among them, since the mobile phone case is usually made of synthetic resin and has low hardness, scratches such as scratches easily occur due to external impact.

Accordingly, in recent years, technology development for a mobile phone film for improving aesthetics as well as protecting mobile phone products has been actively carried out. Cell phone film is a situation in which the color, gloss, and pattern (ie, pattern) of the film are variously required to suit the tastes of modern people with various personalities.

Korean Patent Application Laid-Open No. 2013-0052430 discloses an epoxy protective film for mobile phones and a manufacturing method thereof. The manufacturing method of the epoxy protective film for mobile phone includes the steps of preparing a transparent sticker fabric used as a conventional transparent film for mobile phones, performing a conventional UV coating after conventional UV offset printing on the transparent sticker fabric, and the transparent film applying an epoxy resin to one side of , after cooling the epoxy protective film at room temperature for 4 to 6 hours, taking it out of the dryer to complete the epoxy protective film, and individually packaging the epoxy protective film.

However, in the case of the prior art described above, as the UV coating is performed after UV offset printing, the ink image from the printing plate side is transferred to the blanket and printed on the adherend again, and a separate UV irradiation device is essential, and a separate UV irradiation device is required. Since it includes a heat treatment and drying process, the process is complicated and the process time is long.

In addition, the epoxy protective film for mobile phones according to the prior art has a disadvantage of low aesthetics. In addition, in the case of the prior art, the pattern formed during the UV curing process or the heat treatment process may be damaged, so it is difficult to uniformly transfer the pattern during the transfer process.

In addition, there is a disadvantage in that it is difficult to dissipate the heat generated by the product during the process or during use.

Patent Literature: Republic of Korea Patent Publication No. 2013-0052430 (published on May 22, 2013)

The present invention devised to solve the problems of the prior art as described above, it is an object to provide a mobile phone decoration film and a manufacturing method thereof, which can improve the sharpness and gradation effect of the pattern formed on the decoration film.

In addition, an object of the present invention is to provide a mobile phone decoration film having excellent heat dissipation properties and a manufacturing method thereof.

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 for manufacturing a mobile phone decoration film containing a heat dissipation material according to an embodiment of the present invention comprises: preparing a base film layer; forming a tint printing layer by MDD (Micro Dry Process Decoration) using an ink containing a heat dissipation material on the lower side of the base film layer; forming a UV pattern printing layer under the tint printing layer; forming a deposition layer under the UV pattern printing layer; and forming a silk printing layer disposed below the deposition layer.

It may further include a scattering prevention layer disposed between the tint printing layer and the UV pattern printing layer.

The heat dissipation material is selected from the group consisting of alumina, graphite, silicon nitride, silica, carbon magnesia, and mixtures thereof, and the heat dissipation material may have 40 to 50 parts by weight relative to the tint printing layer.

On the other hand, the cell phone decoration film containing a heat dissipation material according to an embodiment of the present invention in the cell phone decoration film, the base film layer; a tint printing layer disposed below the base film layer; UV pattern printing layer disposed below the tint printing layer; a deposition layer disposed below the UV pattern printing layer; and a silk printing layer disposed below the deposition layer, wherein the tint printing layer may include a heat dissipation material.

Therefore, according to the method for manufacturing a mobile phone decoration film containing the heat dissipating material of the present invention and the mobile phone decoration film manufactured through the same, there is an effect that can improve the sharpness and gradation effect of the pattern formed on the mobile phone decoration film.

In addition, due to the use of PC PMMA material instead of the existing PMMA material, cracks and cracks are suppressed when implementing the three-dimensional shape of the back cover, and the pattern is not exposed to the outside during processing according to the thickness.

In addition, there is an effect that the heat dissipation characteristic is improved.

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 following description. will be able

1 is a cross-sectional view showing the configuration of a mobile phone decoration film containing a heat dissipation material according to an embodiment of the present invention,
2 is a flowchart showing a method of manufacturing a mobile phone decoration film containing a heat dissipation material according to an embodiment of the present invention,
3 and 4 are images showing a perspective view of a configuration of a printing apparatus for an MDD thermal transfer process 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 a cross-sectional view showing the configuration of a decorative film for a mobile phone including a heat dissipation material according to an embodiment of the present invention. The mobile phone decoration film of the present invention is a PC PMMA layer 110 as a base film, and an adhesive layer 120 is formed on the lower side of the PC PMMA layer 110, and the PC layer or PMMA layer ( 130) is formed, the tint printed layer 140 is formed on the lower side of the PC layer or the PMMA layer 130, and the UV pattern printed layer 150 and the metal thin film type deposition layer are formed on the lower side of the tint printed layer 140. (160), and the silk printing layer 170 is formed.

That is, the mobile phone decoration film of the present invention is, as shown in FIG. 1, an adhesive layer 120, a PC layer or a PMMA layer 130, a tint printing layer ( 140), the UV pattern printing layer 150, the deposition layer 160, and the silk printing layer 170 have a structure in which they are sequentially stacked.

The PC PMMA layer 110, which is a base film, is formed by compressing PC (Polycarbonate) and PMMA (Polymethyl methacrylate) into a composite sheet, and the thickness thereof is preferably 0.5 mm.

PC is a kind of thermoplastic plastic. It has characteristics such as impact resistance, heat resistance, weather resistance, self-extinguishing properties, and transparency, and has an impact degree of 150 times higher than that of tempered glass, so it has excellent flexibility and processability. It is often used as a substitute for acrylic, which is easily broken and deformed, and as a complement to general glass.

PMMA is a kind of special resin. It is a polymer (polymer) component of methyl methacrylate. It has excellent optical properties, weather resistance, surface strength, hardness, and moldability.

As a back layer film laminated to the PC PMMA layer 110 , the PC layer or the PMMA layer 130 may be selectively applied, and the thickness thereof is preferably 0.07 to 0.125 mm.

As a material of the adhesive layer 120 used to adhere the base film 110 and the back layer film 130 to each other, a transparent liquid type optically clear resin (OCR) or liquid optically clear adhesive (LOCA)) this is used

Optical adhesive resin is applied as a means to solve problems such as the possibility of bubble formation when applying the substrate of a transparent double-sided tape-type optically clear adhesive (OCA), or a decrease in the step filling ability due to the printing of the cover window. .

The tint printing layer 140 is formed on the PC layer or the PMMA layer 130 , and may be formed through a gravure printing process using a gravure printing roll having a smooth surface. The composition for forming the tint printing layer 140 used at this time includes a dye and a binder. As the tint printing layer 140 is formed by the gravure printing process, a separate heat treatment and drying process is not required, thereby simplifying the process and reducing the process time.

The dye may include at least one red dye selected from the group consisting of Magenta VP, MS Red G, Macrolex Red Violet R, and MS Magenta HM-1450, Waxoline Yellow GFW, Kayaset Yellow GN, and Foron It may include at least one yellow dye selected from the group consisting of Brillinat Yellow 6GL, and also at least one blue selected from the group consisting of Kayaset Blue 714, Waxoline Blue AP-FW, and MS Cyan HM-1238. It may include a series dye. However, the dye that can be used as the dye is not limited, and any dye capable of exhibiting a predetermined color in the cell phone film can be used without limitation.

The binder may use a resin material having a predetermined adhesiveness. By using the adhesive material, it is possible to improve the bonding strength between the film and the pattern layer or metal decoration layer to be described later without a separate adhesive layer. The binder is an epoxy-based resin, an acrylic resin, a polyolefin-based resin, a polyamide-based resin, a polyester-based resin, a polyvinyl chloride-based resin, a polyvinyl acetate-based resin, a petroleum-based resin, a phenol-based resin, a polystyrene-based resin, and a urethane-based resin. It may include at least one of resins.

Meanwhile, the tint printing layer 140 may further include a heat dissipation material.

Here, the heat dissipation material is selected from the group consisting of alumina, graphite, silicon nitride, silica, carbon magnesia, and mixtures thereof, and may have 40 to 50 parts by weight based on 100 parts by weight of the tint printing layer 140 .

On the other hand, if the heat dissipation material is less than 40 parts by weight based on 100 parts by weight of the tint printing layer 140, the required heat dissipation effect cannot be expected, and if the heat dissipation material exceeds 50 parts by weight compared to 100 parts by weight of the tint printing layer 140, gravure printing There is a problem that it is difficult to perform the process, and a problem of reducing the reversibility of the decoration film may occur.

That is, the tint printing layer 140 may be formed in a film form by MDD (Micro Dry Process Decoration) using ink containing a heat dissipation material. The tint printing layer 140 can then effectively dissipate heat generated during the process of printing the UV pattern printing layer 150 and the process of forming an additional layer, and effectively dissipating the heat generated during product (mobile phone) use. There is an effect that can be done.

Meanwhile, although not shown, a scattering prevention layer (not shown) may be further included between the tint printing layer 140 and the UV pattern printing layer 150 . This shatterproof layer may be composed of one layer or a plurality of layers.

The scattering prevention layer may have a transparent adhesive layer on one side of the transparent polymer film, and a transparent adhesive layer on the other side.

Here, the transparent polymer film 22 is one of PolyEthyleneTerephthalate (PET), PolyEthyleneNaphthalate (PEN), PolyetherSulfone (PES), PolyImide (PI), PolyARylate (PAR), PolyCarbonate (PC), PolyMethylMethAcrylate (PMMA), or CycloOlefin Copolymer (COC). It may consist of any one or any one or more. The transparent adhesive layer may be made of any one selected from an adhesive in which a crosslinking agent is mixed with an acrylic resin, a silicone resin or a urethane resin, a thermosetting resin, or an ultraviolet curable resin, or a mixture thereof, or a copolymer thereof, and the transparent adhesive layer is an acrylic resin, a silicone resin, It may be made of any one of an epoxy-based resin, a urethane-based resin, or a composite resin thereof.

The UV pattern printing layer 150 is a layer on which a pattern is printed on the lower side of the tint printing layer 140 by an Ultra-Violet Printing method.

Unlike general commercial paper, which is widely used as printing paper, materials such as Ban, Silver, and PP do not have good ink permeability unlike general paper. There is a problem that the condition of the printout is not good.

The UV printing method is a method to compensate for the above problems, and it uses a dedicated liquid ink that has the property of instant curing, that is, drying immediately when exposed to UV light. It can express various colors, and it is strong against discoloration and moisture, so it can guarantee excellent durability against external weather changes.

Even if it is not a UV-type pattern layer, the pattern layer may be formed through a gravure printing process using a gravure roll in which an intaglio groove of a predetermined design or shape is formed on the surface. At this time, a pattern layer having a concave-convex cross-section may be formed by filling the engraved groove with the pattern layer-forming composition and then performing gravure printing on the tint printing layer 140 . When the pattern layer is formed in this way, it is possible to express various designs, thereby improving esthetics.

The pattern layer forming composition may include a binder material. The binder material is an epoxy-based resin, an acrylic resin, a polyolefin-based resin, a polyamide-based resin, a polyester-based resin, a polyvinyl chloride-based resin, a polyvinyl acetate-based resin, a petroleum-based resin, a phenol-based resin, a polystyrene-based resin, and It may include at least one of urethane-based resins. A gravure printing process is performed by filling a pattern layer-forming composition including a binder material in a gravure roll having intaglio grooves formed on the surface. Accordingly, the pattern layer can be directly formed without a separate curing process later, thereby simplifying the process and reducing the process time.

In this case, when the same material as the binder material used for the tint printed layer 140 is included in the patterned layer forming composition, the interfacial properties between the tinted printed layer 140 and the patterned layer may be improved.

The deposition layer 160 is formed on the lower side of the UV pattern printing layer 150 , and may be formed by chemical vapor deposition (CVD) or physical vapor deposition (PVD).

Chemical vapor deposition using a chemical reaction in the manufacturing process is an industrial method for making a thin film such as silicon on a substrate in a manufacturing process such as an IC. It is used to make silicon oxide film, silicon nitrogen film, and amorphous silicon thin film. When energy is applied to a gas containing chemical substances with heat or light, or when it is subjected to plasma at high frequency, the raw material is radicalized and the reactivity is greatly increased, so that it is adsorbed and deposited on the substrate.

In the physical vapor deposition process, when an oxide semiconductor or GaAs is deposited on a substrate, compounds are melted to form a solid target, volatilized with heat or an electron beam, and deposited on the substrate. At this time, the raw material is sent in a gaseous state through heat, laser, electron beam, etc., and when the blown gaseous raw material touches the substrate, it is changed to a solid state.

The silk printing layer 170 is formed on the lower side of the deposition layer 160 by a silk screen printing method.

Here, the silk printing layer 170 may perform a shielding function.

On the other hand, the manufacturing method of the mobile phone decoration film of the present invention, forming a tint printing layer 140 on the lower side of the PC layer or PMMA layer (130); forming a UV pattern printing layer 150 on the lower side of the tint printing layer 140 ; forming a deposition layer 160 in the form of a metal thin film on the lower side of the UV pattern printing layer 150 ; forming a silk printing layer 170 under the deposition layer 160 ; Forming an adhesive layer 120 composed of a photo-adhesive resin on the upper side of the PC layer or PMMA layer 130, and laminating the PC layer or PMMA layer 130 on the lower side of the PC PMMA layer 110; including; do.

Figure 2 is a flow chart showing a method of manufacturing a decorative film for a mobile phone according to an embodiment of the present invention. As shown in FIG. 2 , a tint printing layer 140 is formed by, for example, tinting printing on one side of the PC layer or the PMMA layer 130 that is the back layer film (S10), and the tint printing layer 140 . A UV pattern printing layer 150 is formed by pattern printing on the lower side of the UV pattern printing layer 150 (S20), and a deposition layer 160, which is a metal thin film layer, is sequentially formed on the lower side of the UV pattern printing layer 150 by deposition (S30). ), to form a silk printing layer 170 on the lower side of the deposition layer 160 (S40).

Next, an optical adhesive resin (OCR) is applied to the upper side of the PC layer or the PMMA layer 130 to form the adhesive layer 120 (S50), and then laminated with the lower side of the PC PMMA layer 110, which is a base film. (S60).

Meanwhile, the adhesive layer 120 may be formed on the lower side of the PC PMMA layer 110 and then laminated with the PC layer 140 or the upper side of the PMMA layer 130 .

On the other hand, the tint printing layer 140 is formed on the lower side of the PC layer or the PMMA layer 130 by MDD (Micro Dry process Decoration) using an ink containing a heat dissipation material, and the PC PMMA layer 110 is lower side. After forming the adhesive layer 120, and laminating the PC PMMA layer 110 with the PC layer 140 or the PMMA layer 130, the UV pattern printing layer 150 on the lower side of the tint printing layer 140, The deposition layer 160 and the silk printing layer 170 may be sequentially formed.

On the other hand, a perspective view of the configuration of the printing apparatus for the MDD thermal transfer process according to an embodiment of the present invention is shown in FIGS. 3 and 4 . More specifically, the printing apparatus for the MDD thermal transfer process includes a thermal transfer head 10 , an MDD thermal transfer ribbon 11 , a platen roller 12 , and a transfer unit 13 . The transfer unit 13 may include a motor 14 , a driving roller 15 , a driven roller 16 , and a film sensor 17 .

The thermal transfer head 10 applies heat to the film including the film layer transferred by the transfer unit 13 and the MDD thermal transfer ribbon 11 . The platen roller 12 faces the thermal transfer head 10 with the film including the film layer and the manufactured MDD thermal transfer ribbon interposed therebetween, so that the decoration layer from the MDD thermal transfer ribbon is adsorbed onto the film layer. It supports the film including the film layer so that it can be rotated according to the transport of the film including the film layer.

The motor 14 is a driving source for supplying a film including a film layer to be printed to the thermal transfer head 10, and the driving roller 15 determines the shape of a pattern preset by a pattern input device (not shown). Accordingly, the film including the film layer is transferred while rotating in engagement with the motor 14 . The driven roller 16 transfers the film including the film layer while rotating in engagement with the driving roller 15 with the film including the film layer interposed therebetween. At this time, the film sensor 17 detects a position along the input pattern shape on the film including the film layer. Accordingly, the decoration layer may be formed on the film layer as heat and pressure are applied only to a predetermined pattern portion. Accordingly, the thermally transferred film may be wound on the winding roll 18 .

In addition, in this MDD thermal transfer process, as shown in FIG. 7 , a decoration layer having a multi-layer structure is formed on the film layer through a process of passing a plurality of thermal transfer heads 10 and MDD thermal transfer ribbon 11 . can do.

At this time, the MDD thermal transfer process uses a thermal transfer head in which a voltage of 200 to 210 V is applied at a pulse number per second (pps) of 90 to 105, a pressure in the range of 150 to 300 kgf/mm2, and a pressure in the range of 80 to 105 ° C. By performing at a rate of 0.1 to 2.0 inch/sec at a temperature, it is possible to solve the problem that a film with an uneven cross-section is produced due to poor reaction stability, or the bonding force between the film layer and the decoration layer is weakened.

In addition, the film layer 3 is to include a hard coating layer (310, 320) on any one of the upper surface or the lower surface of the film layer (3) in order to improve the adhesion with the decoration layer (5) desirable. Accordingly, as shown in Figures 4 and 5, the decoration layer is preferably formed on the hard coating layer of the film layer (3). The hard coating layer serves to improve hardness and adhesion so that the decoration layer 5 can be easily formed on the surface of the film layer 3 without defects by MDD thermal transfer. It is preferable that such a hard coating layer has a pencil hardness of 7H or more.

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 to include other embodiments.

110: PC PMMA layer
120: adhesive layer
130: PC layer, PMMA layer
140: tint printing layer
150: UV pattern printing layer
160: deposition layer
170: silk printing layer

Claims (5)

In the manufacturing method of a mobile phone decoration film,
preparing a base film layer;
forming a tint printing layer on a lower side of the base film layer by using an ink containing a heat dissipation material by MDD (Micro Dry Process Decoration);
forming a UV pattern printing layer under the tint printing layer;
forming a deposition layer under the UV pattern printing layer; and
A method of manufacturing a mobile phone decoration film containing a heat dissipation material comprising the step of forming a silk printing layer disposed below the deposition layer.
The method of claim 1,
A method of manufacturing a mobile phone decoration film containing a heat dissipation material further comprising a scattering prevention layer disposed between the tint printing layer and the UV pattern printing layer.
3. The method of claim 2,
The heat dissipation material is a method of manufacturing a mobile phone decoration film containing a heat dissipation material, characterized in that selected from the group consisting of alumina, graphite, silicon nitride, silica, carbon magnesia and mixtures thereof.
4. The method of claim 3,
The heat dissipation material is a method of manufacturing a mobile phone decoration film containing a heat dissipation material having 40 parts by weight to 50 parts by weight compared to the tint printing layer.
In the mobile phone decoration film containing a heat dissipation material,
base film layer;
a tint printing layer disposed below the base film layer;
UV pattern printing layer disposed below the tint printing layer;
a deposition layer disposed below the UV pattern printing layer; and
Including; a silk printing layer disposed below the deposition layer;
The tint printing layer is a mobile phone decoration film manufactured by MDD (Micro Dry Process Decoration) using ink containing a heat dissipation material.

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