KR101261571B1 - Transcription insert molding film, method of manufacturing the transcription insert molding film and injection molding method using the transcription insert molding film - Google Patents

Abstract

The transfer in-mold film includes a base film, an ultraviolet pattern layer, a hard coating layer, an inkjet printing layer, and an adhesive layer. The ultraviolet pattern layer is formed on the upper surface of the base film, and includes a plurality of first patterns having different heights and widths so as to express a three-dimensional effect according to a predesigned target design. The hard coat layer is formed on the upper surface of the ultraviolet pattern layer. The inkjet printed layer is formed on the lower surface of the base film and includes a plurality of second patterns printed in a roll-to-roll manner using an inkjet printing apparatus having a 1440 dpi resolution according to the target design. do. An adhesive layer is formed on the bottom surface of the inkjet print layer and adheres to the surface of the injection molded product.

Description

TRANSCRIPTION INSERT MOLDING FILM, METHOD OF MANUFACTURING THE TRANSCRIPTION INSERT MOLDING FILM AND INJECTION MOLDING METHOD USING THE TRANSCRIPTION INSERT MOLDING FILM}

The present invention relates to a surface treatment technology of an injection molding, and more particularly, to a transfer in mold film used for surface treatment of an injection molding, a method of manufacturing the transfer in mold film, and a method of manufacturing an injection molding using the transfer in mold film. will be.

In general, a case constituting the surface of an electronic device such as a notebook, a computer, and a communication device such as a mobile phone is made of an injection molding of synthetic resin such as plastic, and may be surface treated by various methods such as plating, vacuum deposition, and painting. . The surface treatment as described above may be performed on all or a part of the surface of the injection molding to improve surface strength, and may prevent wear or scratch of the surface of the injection molding due to external friction. In addition, the electromagnetic wave shielding function may be provided or various patterns may be expressed on the surface to improve aesthetics of electronic and communication devices.

Recently, a method of treating the surface of an injection molded product using a film printed with a pattern has been widely used. The surface treatment method using the film as described above can be largely divided into In Molding Decoration (IMD) and Insert Molding Labeling (IML). In the molding method, only the pattern printed on the film during the injection is transferred to the surface of the injection molding, and the insert molding method is a method in which the film is coated on the surface of the injection molding under a predetermined temperature and pressure. On the other hand, the method of printing the pattern on the film can be largely divided into the gravure printing method and the screen printing method, both of the above methods had a problem that the print quality is poor and it is difficult to express a three-dimensional feeling.

One object of the present invention is to provide a transfer in-mold film that can effectively express the target design for the injection molding by having an improved three-dimensional and aesthetic sense.

Another object of the present invention is to provide a method for producing the transfer in-mold film and a method for producing an injection molded product using the transfer-in-mold film.

In order to achieve the above object, the transfer in-mold film according to an embodiment of the present invention includes a base film, an ultraviolet pattern layer, a hard coating layer, an inkjet printing layer and an adhesive layer. The base film has a transparent material. The ultraviolet pattern layer is formed on an upper surface of the base film, and includes a plurality of first patterns having different heights and widths so as to express a three-dimensional effect according to a predesigned target design. The hard coating layer is formed on the upper surface of the ultraviolet pattern layer. The inkjet print layer is formed on the bottom surface of the base film, and a plurality of second printed in a roll-to-roll method using an inkjet printing device of 1440dpi resolution according to the target design Include patterns. The adhesive layer is formed on the bottom surface of the inkjet print layer and adheres to the surface of the injection molded product.

The ultraviolet pattern layer may be molded by using an ultraviolet pattern mold, and the ultraviolet pattern mold may be manufactured using a photolithography method.

The plurality of first patterns may have a width of 10 μm to 500 μm, and the plurality of first patterns may include high stereoscopic patterns having a width of 10 μm to 300 μm and low stereoscopic patterns having a width of 300 μm to 500 μm. It may include.

The transfer in-molded film may further include a metal deposition layer formed between the base film and the ultraviolet pattern layer and having light reflectivity.

The transfer in-mold film may be cut according to the target design, and the cut-in-mold film may be inserted into an injection mold and combined with a plastic raw material to be molded to the outer surface of the plastic injection molding.

In order to achieve the above another object, in the method of manufacturing a transfer in-mold film according to an embodiment of the present invention, on the upper surface of the base film of a transparent material, different heights to express a three-dimensional feeling according to a previously produced target design An ultraviolet pattern layer including a plurality of first patterns having a width and a width is formed. A hard coating layer is formed on the upper surface of the ultraviolet pattern layer. An inkjet print layer comprising a plurality of second patterns printed on a bottom surface of the base film in a roll-to-roll manner using an inkjet printing apparatus having a resolution of 1440 dpi according to the target design. Is formed. On the lower surface of the inkjet printing layer, an adhesive layer is formed which adheres to the surface of the injection molded product.

In order to achieve the above another object, in the manufacturing method of the injection molding using the transfer in-mold film according to an embodiment of the present invention, the ultraviolet pattern layer formed on the upper surface of the base film of the transparent material and the lower surface of the base film The transfer in-mold film including the inkjet printing layer formed on the above is manufactured. The transfer in-mold film is cut according to a pre-made target design. Using the injection mold, the cut transfer in-mold film is injection molded so as to be integrally combined with the plastic raw material and molded to the outer surface of the plastic injection molded product. The injection molded plastic injection molded product is UV dried to harden the surface. The flash of the parting line of the cured plastic injection molding is removed and then processed. A protective film is attached to the surface of the post-processed plastic injection molding. In the manufacturing of the transfer in-mold film, the ultraviolet pattern layer including a plurality of first patterns having different heights and widths are formed on the upper surface of the base film to express a three-dimensional effect according to the target design. do. A hard coating layer is formed on the upper surface of the ultraviolet pattern layer. The inkjet printing including a plurality of second patterns printed on the bottom surface of the base film in a roll-to-roll manner using an inkjet printing apparatus having a resolution of 1440 dpi according to the target design. A layer is formed. On the lower surface of the inkjet printing layer, an adhesive layer is formed which adheres to the surface of the plastic injection molded product.

The transfer in-mold film according to the embodiments of the present invention as described above includes an ultraviolet pattern layer and an inkjet printing layer. The ultraviolet pattern layer may include a plurality of first patterns having different heights and widths so as to express a three-dimensional effect, thereby effectively expressing a three-dimensional texture of a pattern and / or a pattern. The inkjet printing layer may include a plurality of second patterns formed by using an inkjet printing apparatus having a 1440dpi resolution to express a clear image, and may be formed using a roll-to-roll method to improve productivity. In addition, since the ultraviolet pattern layer is formed on the upper surface of the base film and the inkjet printing layer is formed on the lower surface of the base film, the reliability of the plurality of second patterns can be improved.

1 is a cross-sectional view showing a transfer in-mold film according to an embodiment of the present invention.
2 is a cross-sectional view showing a transfer in-mold film according to another embodiment of the present invention.
3 is a cross-sectional view showing an injection molding including a transfer in-mold film according to embodiments of the present invention.
4 is a flowchart illustrating a method of manufacturing a transfer in-mold film according to embodiments of the present invention.
5 is a flowchart illustrating a method of manufacturing an injection molded product using a transfer in-mold film according to embodiments of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

As the inventive concept allows for various changes and numerous modifications, particular embodiments will be illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "neighboring to," and "directly neighboring to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the terms "comprise", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

On the other hand, when an embodiment is otherwise implemented, a function or operation specified in a specific block may occur out of the order specified in the flowchart. For example, two consecutive blocks may actually be performed substantially simultaneously, and the blocks may be performed upside down depending on the function or operation involved.

1 is a cross-sectional view showing a transfer in-mold film according to an embodiment of the present invention.

Referring to FIG. 1, the transfer in-mold film 100 may include a base film 110, an ultraviolet pattern layer 120, a hard coating layer 130, an inkjet printing layer 140, and an adhesive layer 150.

The base film 110 may be a synthetic resin film made of a transparent material such as polyethylene terephthalate (PET) or polycarbonate (PC). According to the target design manufactured in advance, the base film 110 may be a colorless transparent material or a translucent material having an arbitrary color. The base film 110 may have any thickness.

The ultraviolet pattern layer 120 is formed on the upper surface of the base film 110. The ultraviolet pattern layer 120 may include a plurality of first patterns, and the plurality of first patterns may have various heights and widths different from each other to express a three-dimensional effect according to the target design manufactured in advance. For example, as illustrated in FIG. 1, the plurality of first patterns may include patterns having a first width x1 and a first height y1, and a second width x2 and a second height y2. Branches may include patterns. In addition, the ultraviolet ray pattern layer 120 may be made of a material that can be cured by ultraviolet rays, such as a photopolymerizable resin. The UV pattern layer 120 may have a thickness of about 20 μm to about 100 μm, and when the thickness is thinner than 20 μm, it may be difficult to implement the same in terms of process conditions, and when the thickness is thicker than 100 μm, optical characteristics may deteriorate. have.

In one embodiment, the width of the plurality of first patterns may be about 10 μm to about 500 μm. If the width is smaller than 10 μm, it is difficult to implement this in terms of process conditions. If the width is larger than 500 μm, three-dimensional effects cannot be effectively exhibited. For example, the plurality of first patterns may include a high stereoscopic pattern having a width of about 10 μm to about 300 μm and a low stereoscopic pattern having a width of about 300 μm to about 500 μm. In addition, the heights of the plurality of first patterns may be about 10 μm to about 50 μm, and when the height is lower than 10 μm, it may be difficult to implement them under process conditions, and when the height is higher than 50 μm, optical characteristics may deteriorate. .

In an embodiment, the UV pattern layer 120 may be molded by using an UV pattern mold, and the UV pattern mold may be manufactured using a photolithography method. When using the photolithography method as described above, it is easy to form the plurality of first patterns having a relatively small width, and the height of the plurality of first patterns can be effectively adjusted by using an etch stop layer.

The plurality of first patterns included in the transfer in-mold film according to embodiments of the present invention may be formed to have various patterns and / or patterns, and the plurality of first patterns have irregularities having various heights and widths. By forming a pattern, it is possible to effectively express the three-dimensional texture of the pattern and / or pattern through phenomena such as interference, reflection and refraction of light. In FIG. 1, the cross-sections of the plurality of first patterns have a triangular shape, but according to an embodiment, the cross-sections of the plurality of first patterns may have a quadrangle shape as illustrated in FIG. 2. It may have a semi-circular shape as shown in the figure, or a combination thereof.

The hard coating layer 130 is formed on the upper surface of the ultraviolet pattern layer 120, it may be a material that can be cured by ultraviolet light. As will be described later with reference to FIG. 3, the hard coating layer 130 is disposed on the outermost side of the injection molding manufactured on the basis of the transfer in-mold film 100, and the plurality of first layers included in the ultraviolet pattern layer 120. It protects the patterns. Therefore, the hard coating layer 130 can improve the scratch resistance of the transfer in-mold film 100, and can also implement a unique gloss appearance.

The inkjet print layer 140 is formed on the bottom surface of the base film 110, that is, on the surface opposite to the surface on which the ultraviolet pattern layer 120 is formed. The inkjet print layer 140 includes a plurality of second patterns printed in a roll-to-roll manner by using an inkjet printing apparatus having a 1440 dpi resolution according to the previously designed target design.

The inkjet print layer 140 may be formed through a printing and deposition process. In the printing process, a film is continuously supplied by using a roll-to-roll inkjet printing apparatus to print the plurality of second patterns, and in the deposition process, the plurality of second patterns of the inkjet printing layer 140. A deposition film (not shown) may be formed on the layers to protect the plurality of second patterns.

The plurality of second patterns included in the transfer in-mold film according to the embodiments of the present invention are formed using an inkjet printing apparatus having a resolution of 1440 dpi, thereby improving image sharpness and having various and precise colors such as gradation. Images can be expressed and problems such as light leakage can be reduced. In addition, by using the roll-to-roll method, productivity can be improved. In the transfer in-mold film according to the embodiments of the present invention, the inkjet printing layer 140 including the plurality of second patterns is formed on a surface facing the ultraviolet pattern layer 120 including the plurality of first patterns. As a result, the reliability of the plurality of second patterns may be improved.

The adhesive layer 150 is formed on the lower surface of the inkjet printing layer 140 and may be made of a material such as an in-mold adhesive. As will be described later with reference to FIG. 3, the adhesive layer 150 is attached to the surface of the injection molding, and serves to firmly bond the injection molding with the transfer in-mold film 100.

2 is a cross-sectional view showing a transfer in-mold film according to another embodiment of the present invention.

Referring to FIG. 2, the transfer in-mold film 200 may include a base film 210, an ultraviolet pattern layer 220, a hard coating layer 230, an inkjet printing layer 240, an adhesive layer 250, and a metal deposition layer 260. ).

Except that the cross-section of the plurality of first patterns included in the ultraviolet pattern layer 220 has a rectangular shape and further includes a metal deposition layer 260, the transfer in-mold film 200 of FIG. Is substantially the same as the transfer in-mold film 100. That is, the UV pattern layer 220 is formed on the upper surface of the transparent base film 210, and different heights (e.g., the first height ( y3) and a second height y4) and a plurality of first patterns having a width (eg, a first width x3 and a second width x4). The inkjet print layer 240 is formed on the bottom surface of the base film 210 and includes a plurality of second patterns printed in a roll-to-roll manner using an inkjet printing apparatus having a resolution of 1440 dpi according to the target design. do. The hard coating layer 230 is formed on the upper surface of the ultraviolet pattern layer 220, and the adhesive layer 250 is formed on the lower surface of the inkjet printing layer 240.

The metal deposition layer 260 is formed between the base film 210 and the ultraviolet pattern layer 220 and has a light reflectivity. For example, the metal deposition layer 260 may be formed by depositing a metal material such as silver, aluminum, nickel, or the like, and is represented as a background of the ultraviolet pattern layer 220 to more effectively effect a three-dimensional effect of the ultraviolet pattern layer 220. Can be represented. The metal deposition layer 260 may have a thickness of about 5 μm to about 20 μm, and when the thickness is thinner than 5 μm, it may be difficult to implement it under process conditions, and when the thickness is thicker than 20 μm, optical characteristics may be degraded. have.

In the case where the metal deposition layer 260 is further included as described above, when the transfer in-mold film 200 is exposed to white light or light having mixed wavelengths, the white light and the like pass through the ultraviolet pattern layer 220 to deposit metal. Layer 260 may be reached and reflected at metal deposition layer 260. In this case, lights having different wavelengths are refracted with different refractive indices, and are diffusely reflected by the plurality of first patterns included in the ultraviolet pattern layer 220, so that they are not only expressed in different colors depending on the viewing angle, but also naturally. The optical gradation effect can be implemented to create a beautiful appearance.

3 is a cross-sectional view showing an injection molding including a transfer in-mold film according to embodiments of the present invention.

Referring to FIG. 3, the injection molding 300 includes an injection molded raw material layer 301 and a transfer in-mold film 303. The transfer in-mold film 303 includes a base film 310, an ultraviolet pattern layer 320, a hard coating layer 330, an inkjet printing layer 340, and an adhesive layer 350.

Except that the cross-section of the plurality of first patterns included in the ultraviolet pattern layer 320 has a semi-circular shape, the transfer in-mold film 303 of FIG. 3 is substantially the same as the transfer in-mold film 100 of FIG. 1. same. That is, the UV pattern layer 320 is formed on the upper surface of the transparent base film 310, and different heights (for example, the first height) y5) and a second height y6) and a width (eg, a first width x5 and a second width x6). The inkjet print layer 340 is formed on the bottom surface of the base film 310 and includes a plurality of second patterns printed in a roll-to-roll manner using an inkjet printing apparatus having a resolution of 1440 dpi according to the target design. do. The hard coating layer 330 is formed on the top surface of the ultraviolet pattern layer 320, and the adhesive layer 350 is formed on the bottom surface of the inkjet printing layer 340. On the other hand, the transfer in-mold film 303 manufactured in a roll-to-roll manner may be cut according to the target design.

The raw material layer 301 may be, for example, a plastic raw material such as a synthetic resin, and in this case, the injection material 300 may be a plastic injection material. The cut transfer in-mold film 303 is inserted into an injection mold, and the plastic raw material is inserted into the cut-in transfer mold film 303 and the plastic raw material are integrally combined through the adhesive layer 350 so that an injection molded product ( 300 may be formed. The cut transfer in-mold film 303 is molded to the outer surface of the injection molding 300, and in particular, since the hard coating layer 330 is located at the outermost side of the injection molding 300, the surface hardness of the injection molding 300 may be improved. have. In addition, the aesthetics and three-dimensional appearance of the injection molded product 300 may be improved through the plurality of first patterns included in the ultraviolet pattern layer 320 and the plurality of second patterns included in the inkjet print layer 340.

4 is a flowchart illustrating a method of manufacturing a transfer in-mold film according to an embodiment of the present invention.

Referring to FIG. 4, in the method for manufacturing a transfer in-mold film, an ultraviolet pattern layer is formed on the upper surface of the base film (step S110). For example, the ultraviolet pattern layer having a material that can be cured by ultraviolet rays may be molded on the upper surface of the base film by using an ultraviolet pattern mold.

The base film may be a synthetic resin film of a transparent material such as PET or PC. The ultraviolet pattern layer includes a plurality of first patterns having different heights and widths so as to express a three-dimensional effect according to a predesigned target design. As described above with reference to FIGS. 1 to 3, the cross-sections of the plurality of first patterns may be triangular, square, semicircular, or a combination thereof and may have various heights and widths.

A hard coating layer is formed on the upper surface of the ultraviolet pattern layer (step S120). For example, the hard coating layer for protecting the plurality of first patterns may be formed by applying a material that may be cured by ultraviolet rays on the upper surface of the ultraviolet pattern layer and drying it.

An inkjet print layer is formed on the bottom surface of the base film (step S130). For example, the inkjet printed layer may be formed by printing a plurality of second patterns in a roll-to-roll manner using an inkjet printing apparatus having a resolution of 1440 dpi according to the target design.

Specifically, the forming of the inkjet printed layer may include a printing step and a deposition step. In the printing step, printing is performed using the inkjet printing apparatus implemented by a roll-to-roll method in which a film in a sheet unit is continuously supplied, and an inkjet printing method of 1440 dpi resolution. In the deposition step, a high-purity metal is heated and evaporated in a vacuum using a roll-to-roll evaporator to be coated with a thin film on the surface of the film. When the metal particles are evaporated by placing a particle such as a metal and heating a current through a heater, the film is formed by attaching a skin to the surface of the film by condensing and adhering to the surface of the cold film as the metal particles evaporate. Will be done. After the deposition is completed, the film is detached from the evaporator to inspect the appearance of scratches, and then additionally printed patterns if necessary. The film is protected by printing and drying, and printed so that various colors can be produced.

In one embodiment, the plurality of second patterns included in the inkjet printing layer may be formed through first degree printing, or may be formed through second degree printing. When formed through the second degree printing, the plurality of second patterns may be formed through a process of first printing, first deposition, second printing, and second deposition.

An adhesive layer is formed on the lower surface of the inkjet printing layer (step S140). For example, the adhesive layer may be formed such that the transfer in-mold film is easily adhered to the raw material (for example, plastic raw material) by washing and drying the printed film to remove foreign matters and the like, and then performing binder treatment with hot melt.

Although not shown, when the transfer in-mold film further includes a metal deposition layer formed between the base film and the ultraviolet ray pattern layer as described above with reference to FIG. 2, the ultraviolet ray pattern layer is formed. Previously, the metal deposition layer may be formed on an upper surface of the base film. For example, the metal deposition layer may be formed by applying and drying a metal material such as silver, aluminum, nickel, and the like on the upper surface of the base film. In this case, the ultraviolet pattern layer may be formed on the upper surface of the metal deposition layer after the metal deposition layer is formed.

5 is a flowchart illustrating a method of manufacturing an injection molded product using a transfer in-mold film according to embodiments of the present invention.

Referring to FIG. 5, in the method of manufacturing an injection molding using a transfer in-mold film, the method may include an ultraviolet pattern layer formed on an upper surface of a base film of a transparent material and an inkjet printing layer formed on a lower surface of the base film. A transfer in-mold film is produced (step S210). As described above with reference to FIG. 4, on the upper surface of the base film, the ultraviolet ray pattern layer including a plurality of first patterns having different heights and widths so as to express a three-dimensional effect according to a predesigned target design. And a hard coating layer on an upper surface of the ultraviolet pattern layer, and on a lower surface of the base film, using a inkjet printing apparatus having a resolution of 1440 dpi, according to the pre-fabricated target design, forming an inkjet print layer including a plurality of second patterns printed in a roll-to-roll manner, and forming an adhesive layer adhered to a surface of the plastic injection molded product on a lower surface of the inkjet print layer; In-mold films can be made.

The transfer in-mold film is cut according to the pre-fabricated target design (step S220). For example, the transfer in-mold film manufactured in a roll-to-roll manner may be cut (slit, slitting) in a predetermined sheet unit using a cutting machine.

Using the injection mold, the cut transfer in-mold film is injection molded to be integrally combined with the plastic raw material and molded to the outer surface of the plastic injection molding (step S230). For example, the cut transfer in-mold film is inserted into the injection mold, and the plastic raw material is inserted into the cut-transfer in-mold film and the plastic raw material integrally coupled through the adhesive layer to form the plastic injection-molded product. Can be.

The injection molded plastic injection molded product is UV-dried to be surface cured (step S240), and the flash is removed from the parting line of the hardened plastic injection molded product (step S250). For example, the plastic injection molded product is detached from the injection mold to determine whether the injection process is performed smoothly, and then dried. The remaining foreign matter can be removed by inserting the prepared UV dryer into the UV dryer. In addition, the UV-dried plastic injection molding is subjected to a post-processing step of removing shapes such as a gage or a parting line flash to prepare a form. If additional decoration is required, additional deposition or painting may be performed for further processing. have.

The protective film is attached to the surface of the post-processed plastic injection molded product (step S260). When the complete form for carrying out is formed through the post-processing step, the plastic injection molding is attached with a protective film for protecting the appearance of the injection molding, and the protective film to be attached may be a PET film having a thickness of about 50 μm to 70 μm.

Transfer in-mold film according to embodiments of the present invention can be used for the surface treatment of a variety of injection moldings used as a case of any electronic device and communication device, improve the surface strength of the injection molding and the aesthetics and three-dimensional impression of the injection molding Can be effectively represented.

While the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood.

Claims (9)

delete delete delete delete delete delete delete delete As a method for producing an injection molded product using a transfer in-mold film.
Manufacturing the transfer in-mold film including an ultraviolet pattern layer formed on an upper surface of a base film of a transparent material and an inkjet printing layer formed on a lower surface of the base film;
Cutting the transfer in-mold film according to a pre-made target design;
Injection molding the cut-in transfer film to be integrally formed with a plastic raw material using an injection mold to be molded to an outer surface of the plastic injection molding product;
Surface-curing the UV-molded plastic injection-molded product;
Removing and flashing a parting line of the hardened plastic injection molding; And
Attaching a protective film to a surface of the post-processed plastic injection molding,
Preparing the transfer in-mold film,
Forming an ultraviolet pattern layer on a top surface of the base film, the ultraviolet pattern layer including a plurality of first patterns having different heights and widths to express a three-dimensional effect according to the target design;
Forming a hard coating layer on an upper surface of the ultraviolet pattern layer;
The inkjet printing comprising a plurality of second patterns printed on the bottom surface of the base film in a roll-to-roll manner using an inkjet printing apparatus having a resolution of 1440 dpi according to the target design. Forming a layer; And
Forming an adhesive layer on the bottom surface of the inkjet printed layer, the adhesive layer being attached to the surface of the plastic injection molded product.

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