KR101240027B1 - Insert mold transcription film including three-dimentional pattern of metal texture and method for fabricating the same - Google Patents

Abstract

The present invention relates to an insert mold transfer film including a three-dimensional pattern of a metal texture and a method of manufacturing the same, forming a release layer on the base film, and forming a semi-curable UV coating layer on the release layer; Forming a printing layer on the semi-curable UV coating layer, forming a three-dimensional pattern layer using transparent ink on the printing layer, depositing a metal layer on the surface of the three-dimensional pattern layer, and By performing the step of forming the adhesive layer, the present invention relates to a hairline pattern and various types of high-quality metal texture can be expressed.

Description

INSERT MOLD TRANSCRIPTION FILM INCLUDING THREE-DIMENTION PATTERN OF METAL TEXTURE AND METHOD FOR FABRICATING THE SAME}

The present invention relates to an insert mold transfer film including a three-dimensional pattern of a metal texture and a method of manufacturing the same. More particularly, by forming a three-dimensional pattern under the printed layer based on the transferred state, various forms of high-grade metal It's about a technology that allows you to express texture.

In general, a case of a small electronic product such as a mobile phone is manufactured by injection molding by using a synthetic resin material, the injection molding such as a mobile phone case is coated with UV to protect the surface or beautiful.

On the other hand, in recent years, the keypad of the mobile terminal or the window surrounding the LCD liquid crystal is made of metal (metal) with excellent durability, and fine hair on the surface to give decorative beauty to the surface of the metal keypad or metal window. By forming a line, the decorative effect is exerted.

Conventionally, in order to form a hairline on the surface of a metal keypad or a metal window, a hairline was formed by scraping the surface a plurality of times with a steel brush. However, the method of forming the hairline with a steel brush has a problem in that workability is very cumbersome since the surface of the product must be scratched with a steel brush, as well as the workability of the metal layer is not easily worn using a steel brush. In addition, the dust generated during wear cling to the surface of the product is increasing the probability of failure. Therefore, since the work is additionally required, such as having to remove them one by one, the process was increased and the productivity was lowered.

Therefore, a method of printing the metal layer on one surface but insert-molding the synthetic resin transfer film provided with the hairline printing layer to transfer the printed layer on the surface of the injection molded product is used. As described above, the metallic surface is reproduced on the surface of the injection molded product, but also the hairline is reproduced.

Conventionally, in order to form a printed layer having a hairline formed on the transfer film, a computer graphic program forms a hairline and prints it on a light-transmissive mask film, and then evenly spreads the photoresist on a silk screen. The printed mask film is placed on a silk screen and developed so that only the hairline portion is fixed to the photoresist. Then, the screen is first screen-printed in metallic color so that a hairline is formed on the transfer film, and then the second hair is transferred to the transfer film. After screen printing with a metal color having different saturation so as to cover the line part, the transfer film on which the print layer was formed was insert injection molded to reproduce the metallic lines as well as the hairline on the surface of the injection molded product.

However, in the above method, since the operator manually forms the hairline and prints it on the mask film, and then prints the transfer film on the transfer film, that is, the hairline pattern is formed by the computer program. The hairline is formed on the surface of the simple and regular has a problem that the natural feeling falls.

In addition, the transfer film as described above is inferior in elongation, there is a limit to the implementation of a luxurious metal effect, such as various logos, patterns in addition to the hairline.

Therefore, the present invention has been proposed to solve the fundamental problems of the prior art as described above, based on the transfer film formed from the lower base film to the upper layer using a transparent ink on the upper part of the printing layer pattern or various patterns By forming a three-dimensional pattern having a, and a method of depositing a metal layer on the top, to obtain a high-quality metal texture, but also to provide an excellent elongation to be easily applied to various types of injection molding, after insert transfer An insert mold transfer film having a new metal texture and a method of manufacturing the same, which improves productivity and prevents defective products from being generated by neatly separating the transfer printing portion that is not transferred to the injection molding without a separate post-process. For that purpose to provide .

The insert mold transfer film manufacturing method according to the present invention comprises the steps of forming a release layer on the base film, forming a semi-curable UV coating layer on the release layer, and forming a printing layer on the semi-curable UV coating layer And forming a three-dimensional pattern layer using transparent ink on the printed layer, depositing a metal layer on the surface of the three-dimensional pattern layer, and forming an adhesive layer on the metal layer.

Here, the base film is characterized in that it is produced using PET (Poly Ethylene Terephthalate) or PETG (Poly Ethylene Terephthalate Glycol) resin, the release layer is characterized in that it is formed using a melamine-based release agent or a silicone-based release agent The semi-curable UV coating layer is characterized by using a material comprising 91 to 95 parts by weight of the soft oligomer acrylate and 5 to 9 parts by weight of the photoinitiator with respect to 100 parts by weight of the photocurable solid to form a semi-curable UV coating layer, The soft oligomer acrylate is one selected from urethane acrylate, urethane methacrylate, epoxy acrylate, epoxy methacrylate, ester acrylate, ester methacrylate, acrylic acrylate, polyester acrylate, and amine-modified acrylate. It is special to use the above The semi-curable UV coating layer is formed by mixing 5 to 45 parts by weight of an organic solvent based on 100 parts by weight of the photocurable solid to form the semi-curable UV coating layer.

In addition, the printing layer according to the invention is characterized in that the decoration layer (Decoration) layer using the metal layer as a background, characterized in that further forming a primer layer (Primer) between the semi-curable UV coating layer and the printing layer. do.

In addition, the three-dimensional pattern layer is formed to a thickness of 0.2 ~ 20㎛, Hairline (Hairline) pattern is formed to a thickness of 0.2 ~ 2㎛, embossed or intaglio pattern is characterized in that it is formed to a thickness of 2 ~ 20㎛ It is done.

In addition, the three-dimensional pattern layer is characterized in that it comprises a urethane resin-based two-liquid reactive ink, the metal layer is formed using at least one selected from aluminum, copper and titanium, the metal layer is 50 ~ Forming a thickness of 150 kPa, characterized in that the adhesive primer layer is further formed between the metal layer and the adhesive layer.

In addition, the insert mold transfer film according to the present invention is manufactured by the above-described method, characterized in that it comprises a three-dimensional pattern of metal texture.

As described above, the method of manufacturing an insert mold transfer film according to the present invention forms a three-dimensional pattern using a transparent ink on an upper portion of the printing layer, and deposits a metal layer on the surface of the insert mold transfer film. It can be expressed luxuriously, and provides an effect that can be easily performed.

In addition, the above-described insert mold transfer film of the present invention has a high elongation and thus has excellent moldability, so that the transfer-printed portion after the insert mold transfer process can be neatly separated from the print layer transferred to the injection molding together with the release film. This makes it possible to omit the post-process and provides the effect of convenient work and improved productivity.

In addition, there is an advantage that can significantly reduce the problem of defective products, such as the printing layer transferred to the injection molding is peeled from the injection molding.

The present invention provides an insert mold transfer film comprising a three-dimensional pattern of a metal texture capable of realizing a sharp metal texture with excellent printability, adhesion and solvent resistance, and can realize a three-dimensional three-dimensional pattern with high hardness, and a method of manufacturing the same. do.

Hereinafter, an insert mold transfer film including a three-dimensional pattern of a metal texture according to the present invention and a method of manufacturing the same will be described in more detail.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 is an exploded cross-sectional view showing a bonding process to the insert mold transfer film and the injection molding according to the present invention.

Referring to FIG. 1, the base film 100, the release layer 110, the semi-curable UV coating layer 120, and the print layer from the top to the bottom in the state shown as the insert mold transfer film 180 structure according to the present invention. The primer layer 130, the printing layer 140, the three-dimensional pattern layer 150 using the transparent ink, the metal layer 160, the adhesive layer 170 in order to increase the adhesive force is provided. Then, the injection molding 200 is provided below the adhesive layer 170, such that the insert mold transfer film 180 is transferred to the surface of the injection molding 200.

As such, after the printing layer is formed on the surface of the injection molding 200, the semi-curable UV coating layer 120 is completely cured, and the base film 100 and the release layer 110 are removed to complete the insert mold transfer process. .

Here, although described in order from the top to the bottom as shown for convenience of description, in practice, the insert mold transfer film is formed by placing the base film 100 on the bottom and stacking other layers thereon. Therefore, the actual manufacturing method of the insert mold transfer film according to the present invention will be described.

First, the step of manufacturing a release layer 110 by spraying a release agent on the base film 100. In this case, the material of the base film 100 is preferably manufactured using a poly (ethylene terephthalate) or PET (poly ethylene terephthalate glycol) resin. PET or PETG has a better elongation than the general base film material, it can maximize the moldability when PET or PETG resin is used in the insert mold transfer film according to the present invention.

In addition, the release agent used in the release layer 110 is preferably a melamine-based release agent or a silicone-based release agent. Melamine-based or silicone-based release agent may be applied as a thin liquid, it is suitable as a material for bonding the base film 100 and the semi-curable UV coating layer 120, if the UV coating layer 120 is completely cured in a subsequent process, It provides properties that allow the layer to fall easily.

Next, a step of forming the semi-curable UV coating layer 120 on the release layer 110 is performed. In this case, the semi-curable UV coating layer 120 refers to a UV curable resin layer in a partially cured state by primary UV irradiation.

Therefore, the semi-curable UV coating layer 120 according to the present invention is a material containing 91 to 95 parts by weight of the soft oligomer acrylate and 5 to 9 parts by weight of the photoinitiator with respect to 100 parts by weight of the photocurable solid to form the semi-curable UV coating layer Preference is given to using. At this time, the soft oligomer acrylate is selected from urethane acrylate, urethane methacrylate, epoxy acrylate, epoxy methacrylate, ester acrylate, ester methacrylate, acrylic acrylate, polyester acrylate, amine-modified acrylate Preference is given to using one or more.

In addition, the semi-curable UV coating layer 120 is preferably formed by mixing 5 to 45 parts by weight of an organic solvent with respect to 100 parts by weight of the photocurable solid to form the semi-curable UV coating layer. When the content of the organic solvent is less than 5 parts by weight, the fluidity may be excessively lowered, thereby making it difficult to form a layer as a protective film. When the content of the organic solvent is more than 45 parts by weight, the fluidity may be excessively increased to maintain the film shape normally.

Thereafter, the printing layer 140 is formed on the semi-curable UV coating layer 120. At this time, in order to improve the adhesion of the printing layer 140, and to improve the property of absorbing ink after printing, it is preferable to form a primer layer (Primer, 130) on the semi-curable UV coating layer 120. Therefore, the primer layer 130 is preferably formed using a material made of an acrylic polyol or urethane copolymer having excellent ink absorption. In addition, the primer layer 130 is preferably formed to have a predetermined refractive index with the semi-curable UV coating layer 120, which is to prevent the rainbow (Rainbow) phenomenon. That is, the semi-curable UV coating layer 120 has a flat outer surface, whereas when the outer surface is reflected at an angle, an oil-shaped rainbow phenomenon may occur on the surface. In order to offset such rainbow phenomenon, The primer layer 130 is formed. Such primer layer 120 is preferably coated using a multi-color gravure printing machine (Multi-color Gravuer Printing Machine), is formed to have a thickness of 1.0 ~ 1.5㎛, drying proceeds for 10 seconds at 100 ℃ After drying, it is desirable to undergo a aging process for 24 hours at 40 ℃.

In addition, the print layer 140 is partially printed on the upper surface of the primer layer 130 and serves to represent various designs, characters, or trademarks in various colors. In particular, the printing layer 140 according to the present invention is preferably formed as a decoration layer using the metal layer 160 as a background.

The printing layer 140 is preferably formed of a material comprising 25 parts by weight of pigment, 15 parts by weight of synthetic resin, and 5 parts by weight of a curing agent, wherein the curing agent is made of a material consisting of synthetic resin containing about 40% of a urethane copolymer. More preferably.

In addition, the printing layer 140 is formed using a multi-color gravure printing machine, and is operated at a printing frequency determined by the multi-gravure printing machine. At this time, the print layer 140 is formed to have a thickness of 1.0 ~ 1.5㎛, drying is carried out for 10 seconds at 100 ℃ and after drying the cross-linking of the print layer 140 after aging for 24 hours at 40 ℃ To complete.

Next, the step of forming a three-dimensional pattern layer 150 using a transparent ink on the printing layer 140 is performed. At this time, it is preferable to use a urethane resin-based two-liquid reactive ink as the transparent ink. Since the urethane resin system has excellent adhesive force with the panel fabric, the adhesive force with the printed layer 140 can be improved, and the strength of the metal layer 160 formed subsequently can be improved.

Here, the three-dimensional pattern layer 150 may freely form a hairline pattern, an embossed or intaglio trademark, a logo, and the like, and may be formed by one method selected from a gravure printing method, a silkscreen printing method, and an inkjet printing method. Excellent hairline characteristics can be obtained, and an intaglio or embossed pattern excellent in three-dimensional feeling can be formed. In this case, the three-dimensional pattern layer 150 is preferably formed to a thickness of 0.2 ~ 20㎛, to provide a sufficient three-dimensional feeling and adhesive properties.

Here, when the thickness of the three-dimensional pattern layer 150 is 0.2 ~ 2㎛ can obtain a fine and very excellent hairline effect, the thickness of the three-dimensional pattern layer 150 for the other three-dimensional pattern, such as logo It is preferable to form in thickness of -20 micrometers.

When the thickness of the three-dimensional pattern layer 150 is less than 0.2 μm, a sufficient three-dimensional feeling may not be obtained, and adhesive force with the printing layer 140 or the metal layer 160 may also not be secured. In addition, when the thickness exceeds 20 μm, the thickness of the entire insert mold transfer film may be increased, and moldability may be degraded, thereby preventing a normal insert mold transfer process.

Next, the step of depositing the metal layer 160 on the surface of the three-dimensional pattern layer 150 is performed. At this time, the metal layer 160 is preferably formed using a sputtering deposition process using at least one selected from aluminum, copper, and titanium, and is formed to a thickness of 50 ~ 150Å. If the metal layer 160 is formed with a thickness of less than 50 mm, sufficient metal texture effects may not be obtained. If the metal layer 160 is formed with a thickness of more than 150 mm, a unique texture that may be obtained by the three-dimensional pattern layer 150 may be destroyed. And the thickness of the entire insert mold transfer film may be increased, resulting in a deterioration in moldability.

In addition, the metal layer 160 according to the present invention may further include a background printing layer which may have a different color in addition to the unique metal color. In this case, after the sputtering deposition process is performed only on a portion of the logo or the like to obtain the metal texture effect, the remaining area may be formed as a background printing layer according to the printing layer forming process.

Next, the adhesive layer 170 is formed on the metal layer 160, so that the insert mold transfer film according to the present invention may be smoothly adhered to the injection molding 200. At this time, the surface of the metal layer 160 exhibits an uneven surface state by the three-dimensional pattern layer 150.

Therefore, an adhesive primer layer 165 may be further formed between the metal layer 160 and the adhesive layer 170. However, the adhesive primer layer 165 is not necessarily required, and in the present invention, the adhesive layer 170 may also serve as a primer layer. Therefore, the surface of the metal layer 160 may be naturally flattened by the adhesive layer 170, and the process of bonding the injection molding 200 may also be performed smoothly.

As described above, in the present invention, an excellent metal texture can be obtained through the three-dimensional pattern layer 150, and the decorative effect can be doubled. In particular, in the case of using the three-dimensional pattern layer 150 including the hairline pattern, when the aluminum is deposited, the metallic texture by the silver hairline is expressed, and when the copper is used, the gold hairline may be expressed. In addition, when a mixture of such a hairline pattern and the logo of an embossed or intaglio pattern is used, a decoration pattern having a better effect can be obtained.

Figure 2 is a perspective view showing a three-dimensional pattern layer of the insert mold transfer film according to the present invention.

FIG. 2 illustrates an example of forming a three-dimensional pattern 150 having an intaglio logo formed on a surface of transparent ink, and implementing a hairline on the intaglio logo surface to form a pattern of a luxurious metal texture.

When the actual three-dimensional pattern is formed, the intaglio logo is printed in the reverse direction, and then the hairline is expressed. When the insert mold transfer film including the pattern is applied to the injection molding, the embossed logo appears.

As described above, the insert mold transfer film manufacturing method according to the present invention forms a three-dimensional pattern using a transparent ink on an upper portion of the printing layer, and deposits a metal layer on the surface thereof, thereby providing various types of patterns, trademarks, and hairlines. The logo can be expressed luxuriously and can be easily done.

In addition, the insert mold transfer film of the present invention described above has a high elongation by using a semi-curable UV coating layer, and thus has excellent moldability, and after the insert mold transfer process, the transfer layer is transferred to an injection-molded product along with the release film. It can be neatly separated from, thereby eliminating the post-process, it is convenient and can improve the productivity.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments and can be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative and non-restrictive in all respects.

1 is an exploded cross-sectional view showing a bonding process to the insert mold transfer film and the injection molding according to the present invention.

Figure 2 is a perspective view showing a three-dimensional pattern layer of the insert mold transfer film according to the present invention.

Claims (16)

Forming a release layer on the base film; Forming a semi-curable UV coating layer on the release layer; Forming a printing layer on the semi-curable UV coating layer; Forming a three-dimensional pattern layer using transparent ink on the printed layer; Depositing a metal layer on a surface of the three-dimensional pattern layer; And Forming an adhesive layer on the metal layer; Insert mold transfer film manufacturing method comprising a. The method of claim 1, The base film is a PET (Poly Ethylene Terephthalate) or PETG (Poly Ethylene Terephthalate Glycol) resin insert manufacturing method characterized in that the manufacturing using a resin. The method of claim 1, The release layer is a method of manufacturing an insert mold transfer film, characterized in that formed using a melamine-based release agent or a silicone-based release agent. The method of claim 1, The semi-curable UV coating layer is an insert mold using a material comprising 91 to 95 parts by weight of the soft oligomer acrylate and 5 to 9 parts by weight of the photoinitiator based on 100 parts by weight of the photocurable solid to form the semi-curable UV coating layer Transfer film production method. 5. The method of claim 4, The soft oligomer acrylate is one selected from urethane acrylate, urethane methacrylate, epoxy acrylate, epoxy methacrylate, ester acrylate, ester methacrylate, acrylic acrylate, polyester acrylate, and amine-modified acrylate. An insert mold transfer film manufacturing method characterized by using the above. The method of claim 1, The semi-curable UV coating layer is an insert mold transfer film manufacturing method, characterized in that formed by mixing 5 to 45 parts by weight of an organic solvent with respect to 100 parts by weight of the photocurable solid to form a semi-curable UV coating layer. The method of claim 1, And the printing layer is a decoration layer using the metal layer as a background. The method of claim 1, An insert mold transfer film manufacturing method according to claim 1, further comprising forming a primer layer between the semi-curable UV coating layer and the printing layer. The method of claim 1, Insert pattern transfer film manufacturing method characterized in that the three-dimensional pattern layer is formed to a thickness of 0.2 ~ 20㎛. The method of claim 9, Hairline (Hairline) pattern of the three-dimensional pattern layer insert mold transfer film manufacturing method, characterized in that formed in a thickness of 0.2 ~ 2㎛. The method of claim 9, The embossed or intaglio pattern of the three-dimensional pattern layer is formed to a thickness of 2 ~ 20㎛ insert mold transfer film manufacturing method. The method of claim 1, The three-dimensional pattern layer comprises a urethane resin-based two-component reactive ink manufacturing method. The method of claim 1, And the metal layer is formed using at least one selected from aluminum, copper and titanium. The method of claim 1, Insert metal transfer film manufacturing method characterized in that the metal layer is formed to a thickness of 50 ~ 150Å. The method of claim 1, An adhesive primer layer is further formed between the metal layer and the adhesive layer. An insert mold transfer film prepared by the method of any one of claims 1 to 15, comprising a three-dimensional pattern of metal texture.

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