KR102594871B1 - Manufacturing method of mobile phone decoration film and mobile phone decoration film manufactured through the same - Google Patents

Abstract

The present invention provides a method for manufacturing a mobile phone decoration film, comprising the steps of preparing a base film layer; Forming a tint printing layer on the lower side of the base film layer using ink by MDD (Micro Dry process decoration); Forming a UV pattern printing layer below the tint printing layer; Forming a deposition layer below the UV pattern printing layer; and forming a silk printing layer disposed below the deposition layer, wherein the tint printing layer includes a light-emitting material. A method of manufacturing a mobile phone decoration film and a mobile phone decoration film manufactured thereby are disclosed.

Description

Manufacturing method of mobile phone decoration film and mobile phone decoration film manufactured thereby {Manufacturing method of mobile phone decoration film and mobile phone decoration film manufactured through the same}

The present invention relates to a method for manufacturing a mobile phone decoration film and a mobile phone decoration film manufactured thereby.

Recently, with the development of mobile phone and smartphone technology, mobile phones and smartphones (hereinafter collectively referred to as 'mobile phones') of various designs are being released.

These mobile phones are composed of a case that makes up the exterior, and various circuit parts mounted inside the case to perform the original functions of the mobile phone. Among these, mobile phone cases are usually made of synthetic resin and have low hardness, so scratches and other scratches easily occur due to external impacts.

Accordingly, in recent years, technology development for mobile phone films has been actively conducted to not only protect mobile phone products but also improve aesthetics. Mobile phone films are being demanded in a variety of colors, gloss, and patterns (i.e., patterns) to suit the tastes of modern people with diverse personalities.

Republic of Korea Patent Publication No. 2013-0052430 discloses an epoxy protective film for mobile phones and a method of manufacturing the same. The method of manufacturing the epoxy protective film for mobile phones includes preparing a transparent sticker fabric used as a normal transparent film for a mobile phone, performing normal UV offset printing on the transparent sticker fabric and then performing a normal UV coating, and the transparent film. Applying an epoxy resin to one side, moving the transparent film coated with the epoxy resin to a heat dryer and heat treating it at 30 to 45° C. for 8 to 12 hours to bond the epoxy resin to the transparent film to produce an epoxy protective film. , cooling the epoxy protective film at room temperature for 4 to 6 hours and then 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 above-described prior art, as UV coating is performed after UV offset printing, the ink image must be transferred from the printing plate surface to the blanket and printed again on the adherend, a separate UV irradiation device is essential, and a separate UV irradiation device is essential. Since it involves heat treatment and drying processes, the process is not only complicated but also takes a long time.

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

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

The purpose of the present invention, which was devised to solve the problems of the prior art as described above, is to provide a mobile phone decoration film and a manufacturing method thereof that can improve the clarity and gradient effect of the pattern formed on the decoration film.

In addition, the purpose of the present invention is to provide a mobile phone decoration film that can provide excellent axis/luminescence characteristics and long-term emission sustainability and a method of manufacturing the same.

Meanwhile, 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 will be clearly apparent to those skilled in the art from the description below. It will be understandable.

A method of manufacturing a mobile phone decoration film according to an embodiment of the present invention includes preparing a base film layer; Forming a tint printing layer on the lower side of the base film layer using ink by MDD (Micro Dry process decoration); Forming a UV pattern printing layer below the tint printing layer; Forming a deposition layer below the UV pattern printing layer; and forming a silk printing layer disposed below the deposition layer, wherein the tint printing layer may include a light-emitting material.

It may further include an anti-scattering layer disposed between the tint printed layer and the UV pattern printed layer.

The light-emitting material includes a strontium aluminate-based pigment, and the strontium aluminate-based pigment may include strontium carbonate, calcium carbonate, didysprosium trioxide, aluminum oxide, boric acid, and dieuropium trioxide.

The light-emitting material may have 40 to 50 parts by weight based on 100 parts by weight of the tint printed layer.

On the other hand, the mobile phone decoration film according to an embodiment of the present invention includes a base film layer; A tint printing layer disposed below the base film layer; a 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 light-emitting material.

Therefore, according to the method for manufacturing a mobile phone decoration film of the present invention and the mobile phone decoration film manufactured through the method, there is an effect of improving the clarity and gradation effect of the pattern formed on the mobile phone decoration film.

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

In addition, it has the effect of providing excellent axis/luminescence characteristics and long-term emission sustainability.

Meanwhile, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

1 is a cross-sectional view showing the configuration of a mobile phone decoration film according to an embodiment of the present invention,
Figure 2 is a procedure diagram showing a method of producing a mobile phone decoration film according to an embodiment of the invention,
Figures 3 and 4 are images showing a perspective view of the configuration of a printing device for the MDD thermal transfer process according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached 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 example is provided to more completely explain the present invention to those skilled in the art. Therefore, the shapes of elements in the drawings are exaggerated to emphasize clearer explanation.

The configuration of the invention to clarify 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 preferred embodiments of the present invention, and the reference numbers to the components in the drawings will be the same. Components are given the same reference numbers even if they are in different drawings, and it is stated in advance that components of other drawings can be cited when necessary when explaining the relevant drawings.

Figure 1 is a cross-sectional view showing the configuration of a deco film for a mobile phone according to an embodiment of the present invention. The mobile phone decor film of the present invention has a PC PMMA layer 110 as a base film, an adhesive layer 120 is formed on the lower side of the PC PMMA layer 110, and a PC layer or PMMA layer ( 130) is formed, a tint printed layer 140 is formed on the lower side of the PC layer or PMMA layer 130, and a UV pattern printed layer 150 is formed on the lower side of the tint printed layer 140, and a deposition layer in the form of a metal thin film. (160), and a silk printing layer (170) is formed.

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

The PC PMMA layer 110, which is a base film, is formed into a composite sheet by compressing PC (polycarbonate) and PMMA (polymethyl methacrylate), and its thickness is preferably 0.5 mm.

PC is a type of thermoplastic plastic. It has characteristics such as impact resistance, heat resistance, weather resistance, self-extinguishing, and transparency, and has an impact resistance of about 150 times that of tempered glass, so it has excellent flexibility and processability. It is often used as a substitute for acrylic, which is easily brittle and deformed, and as a supplement to general plate glass.

PMMA is a type of special resin and is a polymer component of methyl methacrylate, and is characterized by excellent optical properties, weather resistance, surface strength, hardness, and moldability.

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

The material of the adhesive layer 120 used to adhere the base film 110 and the back layer film 130 is transparent liquid optically adhesive resin (optically clear resin (OCR) or liquid optically clear adhesive (LOCA)). This is used.

Opto-adhesive resin is applied as a means to solve the problems of transparent double-sided tape-type optically adhesive film (optically clear adhesive, OCA), such as the possibility of creating bubbles when applying the substrate and the deterioration of the ability to fill gaps due to printing on the cover window. .

The tint printing layer 140 is formed on the PC layer or PMMA layer 130, and may be formed through a gravure printing process using a gravure printing roll with a smooth surface. The composition for forming the tint printing layer 140 used at this time includes dye and binder. As the tint printing layer 140 is formed through the gravure printing process, there is no need for separate heat treatment and drying processes, which has the effect of 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 dye selected from the group consisting of Kayaset Blue 714, Waxoline Blue AP-FW, and MS Cyan HM-1238. May contain series dyes. However, the dye that can be used as the dye is not limited, and any dye that can display a predetermined color in the mobile phone film can be used without limitation.

The binder may be a resin material having a certain adhesiveness. By using an adhesive material, the bonding strength between the film and the pattern layer or metal decoration layer described later can be improved without a separate adhesive layer. The binder is an epoxy resin, acrylic resin, polyolefin resin, polyamide resin, polyester resin, polyvinyl chloride resin, polyvinyl acetate resin, petroleum resin, phenol resin, polystyrene resin, and urethane resin. It may contain at least one of resins.

Meanwhile, the tint printing layer 140 may be formed by MDD (Micro Dry process decoration) using ink containing a light-emitting material.

In the present invention, the light-emitting material may be a phosphorescent, fluorescent, or photoluminescent material.

Here, the luminescent material includes a strontium aluminate-based pigment, and the strontium aluminate-based pigment may include strontium carbonate, calcium carbonate, didysprosium trioxide, aluminum oxide, boric acid, and dieuropium trioxide.

Meanwhile, the light-emitting material is preferably composed of particles with a particle size distribution of 1 to 3 ㎛ and an average particle diameter of 2 ㎛. If the particle size of the light-emitting material is less than 1 ㎛, the particles may be too fine and the expression of luminescent characteristics may be weak, and if it exceeds 3 ㎛, particle peeling occurs during printing, and the thickness of the tint print layer 140 increases more than necessary. There may be a problem.

Luminous materials are classified by color (e.g., Yellowish Green, Bluish Green, Sky Blue, Orange, Red, Green, Blue, Lemon Yellow, Pink, Orange Red, Rose Red, Orange Yellow, Blue Green, Yellow Green, Violet Glow, Orange Glow) , White Glow, Red Glow), it can emit light in unique colors, enabling various luminous effects suitable for the specific product to be applied.

Meanwhile, the light emitting material 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 luminescent material is less than 40 parts by weight compared to 100 parts by weight of the tint print layer (140), the required luminous effect cannot be expected, and if the luminescent material is more than 50 parts by weight compared to 100 parts by weight of the tint print layer (140), gravure printing There are problems in carrying out the process, and problems that reduce the reversibility of the decoration film may occur.

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 anti-scattering layer may be composed of one layer or multiple layers.

The anti-scattering layer may have a transparent adhesive layer applied to one side of the transparent polymer film and a transparent adhesive layer applied to the other side.

Here, the transparent polymer film 22 is made of PET (PolyEthyleneTerephthalate), PEN (PolyEthyleneNaphthalate), PES (PolyetherSulfone), PI (PolyImide), PAR (PolyARylate), PC (PolyCarbonate), PMMA (PolyMethylMethAcrylate), or COC (CycloOlefin Copolymer). It may consist of one or more than one. The transparent adhesive layer may be made of any one selected from acrylic resin, silicone resin, or urethane resin, such as heat-curable resin or UV-curable resin mixed with a crosslinker, or a mixture thereof, or a copolymer thereof. It may be made of any one of epoxy resin, urethane resin, or their composite resin.

The UV pattern printing layer 150 is a layer in which a pattern is printed on the lower side of the tint printing layer 140 using an ultra-violet printing method.

Unlike general commercial paper, which is widely used as printing paper, materials such as gold paper, silver paper, and PP do not have good ink permeability, unlike regular paper, so the drying speed of ink after printing is slow, smears occur, ink spreads, and the printed matter is damaged. There is a problem that is not in good condition.

The UV printing method is a method to compensate for the above problems. It uses a dedicated liquid ink that instantly hardens when exposed to UV light, that is, dries immediately. Since it dries instantly using ultraviolet rays, there are no restrictions on the material. It can express a variety of colors and is resistant to discoloration and moisture, ensuring excellent durability against external weather changes.

Even if it is not a UV-type pattern layer, the pattern layer can be formed through a gravure printing process using a gravure roll on which an engraved groove of a preset design or shape is formed on the surface. At this time, a pattern layer having a concavo-convex cross-section may be formed by filling the pattern layer forming composition into the intaglio groove and then gravure printing it on the tint printing layer 140. When a pattern layer is formed in this way, it is possible to improve aesthetics by enabling various design expressions.

The pattern layer forming composition may include a binder material. The binder material includes epoxy resin, acrylic resin, polyolefin resin, polyamide resin, polyester resin, polyvinyl chloride resin, polyvinyl acetate resin, petroleum resin, phenolic resin, polystyrene resin, and It may contain at least one of urethane-based resins. A gravure printing process is performed by filling a gravure roll with an engraved groove on its surface with a pattern layer forming composition containing a binder material. Accordingly, the pattern layer can be formed immediately without a separate curing process later, which has the effect of simplifying the process and reducing the process time.

At this time, when the pattern layer forming composition includes the same material as the binder material used in the tint print layer 140, the interface characteristics between the tint print layer 140 and the pattern layer can 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, which uses a chemical reaction in the manufacturing process, is an industrial method of creating a thin film of silicon, etc., on a substrate in the manufacturing process of ICs. It is used to make silicon oxide films, silicon nitrogen films, and amorphous silicon thin films. When energy is applied to a gas containing a chemical substance through heat or light, or when it is turned into a plasma using high frequency, the raw material is radicalized, greatly increasing its reactivity, and adsorbed and deposited on the substrate.

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

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

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

Meanwhile, the manufacturing method of the mobile phone decoration film of the present invention includes 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 on the lower side of the deposition layer 160; Forming an adhesive layer 120 made of 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. do.

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

Meanwhile, tint printing is performed on the lower side of the PC layer or PMMA layer 130 to form a tint printed layer 140, an adhesive layer 120 is formed on the lower side of the PC PMMA layer 110, and the PC PMMA layer 110 is formed. After laminating with the PC layer 140 or PMMA layer 130, a UV pattern printing layer 150, a deposition layer 160, and a silk printing layer 170 are sequentially placed on the lower side of the tint printing layer 140. It can also be formed.

Meanwhile, a perspective view of the configuration of a printing device 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 device 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 MDD thermal transfer ribbon 11 and the film including the film layer transported by the transfer unit 13. The platen roller 12 faces the heat transfer head 10 with the film including the film layer and the manufactured MDD heat transfer ribbon in between, and the decoration layer is adsorbed from the MDD heat transfer ribbon onto the film layer. It supports the film including the film layer so that it rotates as the film including the film layer is transported.

The motor 14 is a driving source for supplying the film containing the film layer to be printed to the thermal transfer head 10, and the driving roller 15 is used to create the shape of a pattern preset by a pattern input device (not shown). Accordingly, the film including the film layer is transported while rotating in engagement with the motor 14. The driven roller 16 rotates in engagement with the driving roller 15 with the film including the film layer interposed therebetween, thereby transporting the film including the film layer. At this time, the film sensor 17 detects the position along the input pattern shape on the film including the film layer. Accordingly, the decoration layer can be formed on the film layer by applying heat and pressure only to the preset pattern portion. As a result, the film on which heat transfer has been completed can be wound on the winding roll 18.

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

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

In addition, the film layer 3 includes a hard coating layer 310, 320 on either the upper or lower surface of the film layer 3 in order to improve adhesion with the decoration layer 5. desirable. Accordingly, as shown in FIGS. 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. This hard coating layer preferably has a pencil hardness of 7H or higher.

The above detailed description is illustrative of the present invention. Additionally, the foregoing is intended to illustrate 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 can be made within the scope of the inventive concept disclosed in this specification, a scope equivalent to the written disclosure, and/or within the scope of technology or knowledge in the art. The written examples illustrate the best state for implementing the technical idea of the present invention, and various changes required for specific application fields and uses of the present invention are also possible. Accordingly, the detailed description of the invention above is not intended to limit the invention to the disclosed embodiments. Additionally, the appended claims should be construed to include other embodiments as well.

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 mobile phone decoration film,
Preparing a PC PMMA layer;
Forming an adhesive layer below the PC PMMA layer;
Forming a PC layer or PMMA layer below the adhesive layer;
Forming a tint printing layer on the lower side of the PC layer or PMMA layer by MDD (Micro Dry process decoration) using ink containing a strontium aluminate-based pigment, which is a light-emitting material;
Forming a UV pattern printing layer below the tint printing layer;
Forming a deposition layer below the UV pattern printing layer; and
Comprising: forming a silk printing layer disposed below the deposition layer,
The light-emitting material includes a strontium aluminate-based pigment,
The strontium aluminate-based pigment includes strontium carbonate, calcium carbonate, didysprosium trioxide, aluminum oxide, boric acid, and dieuropium trioxide,
The light-emitting material consists of particles with a particle size distribution of 1 to 3 ㎛,
The light emitting material is characterized in that it has 40 parts by weight to 50 parts by weight based on 100 parts by weight of the tint printing layer,
A method of manufacturing a mobile phone decoration film, further comprising an anti-scattering layer disposed between the tint printed layer and the UV pattern printed layer. delete delete delete In mobile phone decoration film,
PC PMMA layer;
An adhesive layer formed on the lower side of the PC PMMA layer;
A PC layer or PMMA layer formed below the adhesive layer;
A tint printing layer disposed below the PC layer or PMMA layer;
a UV pattern printing layer disposed below the tint printing layer;
A deposition layer disposed below the UV pattern printing layer; and
It includes; a silk printing layer disposed below the deposition layer,
The tint printing layer is formed by MDD (Micro Dry process decoration) using ink containing strontium aluminate-based pigment, which is a light-emitting material,
The light-emitting material includes a strontium aluminate-based pigment,
The strontium aluminate-based pigment includes strontium carbonate, calcium carbonate, didysprosium trioxide, aluminum oxide, boric acid, and dieuropium trioxide,
The light-emitting material consists of particles with a particle size distribution of 1 to 3 ㎛,
The light emitting material is characterized in that it has 40 parts by weight to 50 parts by weight based on 100 parts by weight of the tint printing layer,
A mobile phone decoration film further comprising a shatterproof layer disposed between the tint printed layer and the UV pattern printed layer.