KR100877184B1 - Manufacturing method of frinting film for insert molding - Google Patents

Abstract

A method for preparing a print film for insert molding is provided to improve adhesion velocity and to omit drying process, thereby enhancing productivity. A method for preparing a print film for insert molding comprises the steps of coating a coating agent comprising a silicon dioxide nanoparticle and a siloxane compound on the base film and irradiating UV rays to cure, thereby forming a UV hard coating layer; forming a printing primer layer on the upper surface of the UV hard coating layer; forming a printing layer on the upper surface of the printing primer layer by partial printing; forming a hydrophilic cleaning primer layer on the upper surface of the printing layer by partial printing; forming a vapor deposition layer on the upper surface of the printing layer by the vacuum vapor deposition of metal or metal compounds; cleaning the cleaning primer layer with water to remove it; and forming a hot-melt adhesive layer on the upper surface of the printing primer layer, the printing layer and the vapor deposition layer.

Description

Manufacturing Method of Print Film for Insert Molding {MANUFACTURING METHOD OF FRINTING FILM FOR INSERT MOLDING}

Figure 1a and 1b is a cross-sectional view showing a manufacturing process of a manufacturing method of an insert molding printing film and a process for manufacturing an insert molding printing film according to the present invention.

Figure 2a and Figure 2b is a cross-sectional view showing a manufacturing process and a manufacturing process of the insert molding printing film for another embodiment of the manufacturing method of the insert molding printing film according to the present invention.

Figure 3a and Figure 3b is a cross-sectional view showing a manufacturing process and a manufacturing process of the insert molding printing film for another embodiment of the manufacturing method of the insert molding printing film according to the present invention.

Figure 4 is a view showing the structural formula of the coating used in the UV hard coating process in the manufacturing method of the insert molding printing film of Figures 1a to 3c.

Figures 5a and 5b is a cross-sectional view showing a manufacturing process and a manufacturing process of the insert molding printing film for another embodiment of the manufacturing method of the insert molding printing film according to the present invention.

※ Explanation of codes for main parts of drawing

11: base film 12: release agent layer

13, 13 ': UV hard coating layer 14: printing primer layer

15: printed layer 16: vapor deposition primer layer

17: deposited layer 18: antioxidant layer

19: hot melt adhesive 21: washing primer layer

The present invention relates to a manufacturing method of a printing film for insert molding, and more particularly, cracks do not occur even when transferred simultaneously with injection molding of a molded article through the use of a completely curable and highly flexible resin, and deposition and printability. It relates to a manufacturing method of a printing film for insert molding excellent and excellent surface strength.

In general, an in-mold film is used to manufacture keypads or LCD windows installed in various windows and decoration panels, including a name plate of a mobile phone, a washing machine, or a home appliance, and the in-mold film has various printed layers on the back of the base film. It is inserted into the mold during injection of various products, and is attached to the surface of various panels through press heating and compression.

The method of attaching the in-mold film to the surface of the resin molded article used in the related art as described above is called a molding simultaneous transfer method. That is, in the simultaneous molding method, a transfer film in which a transfer layer composed of a release layer, a print layer, and an adhesive layer is sequentially stacked on a base film is sandwiched in a molding die, and resin is injected into and filled with a cavity. After cooling, a resin molded article is obtained and the in-mold film is adhered to the surface thereof, and then the base film is peeled off, thereby transferring the transfer film onto the resin molded article surface to perform decoration. The in-mold film used in the molding simultaneous transfer method is formed by printing each layer on a long length base film in accordance with the roll width of the printing press, cutting it to an appropriate width in accordance with the size of the transfer object, and transferring the same. do.

However, in the above case, there is a drawback that the slit portion of the in-mold film causes the peeling phenomenon that the surface is peeled off by the chuck that the blade touches upon slit. This is because, between the base film and the transfer layer of the in-mold film, the peelability of not only the portion provided for the transfer but also the portion not provided for the transfer is excellent. The peeling phenomenon is transferred when there are many printed layers as a transfer layer, or when it is necessary to form a deposited layer as a printed layer, when a peeling layer must be thickened like a hard coating in-mold film, or when there are many functional layers. The thicker the layer, the more pronounced it occurs.

As a result, there was a problem that the ink coated piece is again attached to the in-mold film and enters between the transfer object and the transfer layer during transfer, and if the ink coated piece is attached to the back surface of the in-mold film or the transfer is performed simultaneously with the molding, the ink coated piece is There was a problem in that it was adhered to the cavity surface of the mold, and thus, nicks were formed on the surface of the molded article due to ink coating pieces.

On the other hand, as a manufacturing method of a molded article excellent in wear resistance and chemical resistance, conventionally providing a protective printed layer made of an active energy ray-curable resin composition on the emission surface of the base film, a photo printing layer, adhesive printing layer, etc. The transfer material obtained by providing an additional layer of the adhesive is adhered on the surface of the molded article, and the protective film layer made of the active energy ray-curable resin composition is provided on one side without release of the base film or the base film, and the base film The surface protection sheet obtained by providing an additional layer, such as a photographic printing layer and an adhesive printing layer, on the other side of the method, etc. are adhere | attached on the surface of a molded article.

However, in the method for producing a molded article having excellent wear resistance and chemical resistance, the active energy ray-curable resin composition and the surface protective sheet of the base film such as in-mold film are crosslinked and cured by being irradiated with active energy ray before use (preliminary curing). In this case, when the base film is attached to the molded article, there is a problem that a crack easily occurs in the protective printed layer located on the curved portion of the molded article.

Accordingly, an object of the present invention is a print film for insert molding, which has no cracking, excellent deposition and printability, and excellent surface strength even when transferred simultaneously with injection molding of a molded article through the use of a completely curable and highly flexible resin. To provide a method of manufacturing.

The above object of the present invention,

UV hard coating process for forming a UV hard coating layer by applying a coating agent comprising nanoparticles of silicon dioxide and siloxane compound on the upper surface of the base film and then irradiating with UV light to form a UV hard coating layer, and then printing the UV hard coating layer A printing primer layer coating process of forming a printing primer layer on the entire surface of the UV hard coating layer so as to enhance adhesion between the layers, and a printing process of partially forming a printing layer on the upper surface of the printing primer layer; A coating process for forming a hydrophilic washing primer layer partially formed on the upper surface of the printing layer, and depositing a metal or metal compound by vacuum deposition except for the portion where the washing primer layer is formed on the upper surface of the printing layer. A deposition process for forming a layer, and a washing in which the washing primer layer is washed off with water Jung, is achieved by providing a method for producing the printing primer layer, a print layer and a deposited layer insert molding printed films, comprising a step of including an adhesive applying step of forming a hot-melt adhesive layer on the surface of the.

In addition, the above object of the present invention,

UV hard coating process for forming a UV hard coating layer by applying a coating agent comprising nanoparticles of silicon dioxide and siloxane compound on the upper surface of the base film and then irradiating with UV light to form a UV hard coating layer, and then printing the UV hard coating layer A printing primer layer coating process of forming a printing primer layer on the upper surface of the UV hard coating layer so as to enhance adhesion between the layers, and a printing process of partially forming a printing layer on the upper surface of the printing primer layer; A deposition primer layer coating process of forming a deposition primer layer so as to enhance adhesion of the deposition layer deposited on the upper surface of the printing layer, and partially forming a hydrophilic washing primer layer on the upper surface of the deposition primer layer Coating process of the cleaning primer layer, and the cleaning primer layer on the upper surface of the deposition primer layer A deposition process for forming a deposition layer by vacuum deposition of a metal or a metal compound except for the formed portion, a cleaning process of washing off the washing primer layer with water, and the printing primer layer, printing layer, deposition primer layer, and deposition layer. It is achieved by providing a method for producing a printing film for insert molding comprising an adhesive coating step of forming a hot melt adhesive layer on the upper surface of the.

In addition, the above object of the present invention,

UV hard coating process for forming a UV hard coating layer by applying a coating agent comprising nanoparticles of silicon dioxide and siloxane compound on the upper surface of the base film and then irradiating with UV light to form a UV hard coating layer, and then printing the UV hard coating layer A printing primer layer coating process of forming a printing primer layer on the upper surface of the UV hard coating layer so as to enhance adhesion between the layers, and a printing process of partially forming a printing layer on the upper surface of the printing primer layer; A deposition primer layer coating process of forming a deposition primer layer so as to enhance adhesion of the deposition layer deposited on the upper surface of the printing layer, and partially forming a hydrophilic washing primer layer on the upper surface of the deposition primer layer Coating process of the cleaning primer layer, and the cleaning primer layer on the upper surface of the deposition primer layer A deposition process of forming a deposition layer by vacuum depositing a metal or a metal compound except for the formed portion, a cleaning process of washing off the washing primer layer with water, and a process of preventing the oxidation of the deposition layer. An insert molding process comprising: an antioxidant treatment step of forming an antioxidant layer on an upper surface, and an adhesive coating step of forming a hot melt adhesive layer on an upper surface of the print primer layer, the print layer, the deposition primer layer, and the antioxidant layer. It is achieved by providing a method for producing a printing film for use.

According to a preferred feature of the present invention, the printing primer layer coating step is a step of applying a coating agent consisting of an acrylic polyol or urethane copolymer and drying at 100 ° C. for 10 seconds and aging at 40 ° C. for 24 hours.

According to a more preferred feature of the present invention, the printing primer layer coating process is a step of forming the printing primer layer to have a predetermined refractive index with the UV hard coating layer so that the rainbow phenomenon can be improved.

According to a further preferred feature of the present invention, the printing process is applied to the ink agent consisting of 25 parts by weight of pigment, 15 parts by weight of synthetic resin and 5 parts by weight of curing agent and then dried at 100 ℃ for 10 seconds and aged at 40 ℃ 24 hours It is a process.

According to a further preferred feature of the present invention, the deposition primer layer coating process is applied after the coating agent consisting of a curing agent containing 80% by weight of the synthetic resin and urethane copolymer, dried at 100 ℃ for 10 seconds and aged at 40 ℃ 24 hours It is a process to do it.

According to a further preferred feature of the present invention, the washing primer layer coating process is a coating of a polyacetate-based binder resin and a barium sulfate added to the binder resin and then dried at 100 ℃ for 10 seconds and at 40 ℃ It is a process of aging for 24 hours.

According to a further preferred feature of the present invention, the antioxidant treatment step is a step of applying a coating agent consisting of polyvinyl chloride-based binder resin and then drying at 100 ℃ for 30 seconds.

According to a further preferred feature of the invention, the adhesive coating step is a step of applying a polyester-based hot melt adhesive and drying for 30 seconds at 100 ℃.

In addition, the above object of the present invention,

A release treatment step of forming a release agent layer on the entire surface of the base film, a UV hard coating process of forming a UV hard coating layer on the entire surface of the release agent layer, and the UV hard coating layer and a printing layer laminated thereafter A printing primer layer coating process of forming a printing primer layer on the entire surface of the UV hard coating layer so as to enhance the adhesive strength of the UV hard coating layer, a printing process of partially forming a printing layer on the upper surface of the printing primer layer, and the printing A coating process for forming a hydrophilic washing primer layer partially on an upper surface of the layer, and depositing a deposition layer by vacuum depositing a metal or a metal compound except for a portion where the cleaning primer layer is formed on the upper surface of the printing layer. A deposition step of forming and a washing step of washing off the washing primer layer with water, the printing primer layer, It is also achieved by providing a method for producing a printing film for insert molding comprising an adhesive coating step of applying a hot melt adhesive layer on the upper surface of the deposition layer.

According to a preferred feature of the invention, the deposition primer for forming a deposition primer layer on the upper surface of the printing layer after the printing process before the cleaning primer layer coating process so that the adhesion of the deposition layer formed by the deposition process can be enhanced It further comprises a layer coating process.

According to a more preferred feature of the present invention, after the cleaning step before the adhesive coating step further comprises an oxidation treatment step of forming an antioxidant layer on the upper surface of the deposition layer to prevent oxidation of the metal component of the deposition layer do.

According to a further preferred feature of the present invention, the release treatment step is a step of applying a coating agent consisting of a melamine resin-based release agent and a curing agent consisting of P-toluenesulphonic acid and then drying and curing at 100 to 160 ° C for 30 seconds.

According to a further preferred feature of the present invention, the UV hard coating step is a step of applying a coating agent consisting of an acrylic copolymer, a siloxane compound and a conductive polymer compound and then irradiating and curing ultraviolet rays.

According to a still further preferred feature of the present invention, the acrylic copolymer, siloxane compound and conductive polymer compound each have 80 to 95 parts by weight, 5 to 20 parts by weight and 0.1 to 10 parts by weight.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this is to describe in detail enough to easily practice the invention having ordinary skill in the art to which the present invention belongs, and this does not mean that the technical spirit and scope of the present invention is limited.

1A and 1B are sectional views showing a process diagram and a manufacturing process of an insert molding printing film according to an embodiment of the method of manufacturing an insert molding printing film according to the present invention. As shown in Figure 1a and 1b, the manufacturing method of the insert molding printing film according to the present invention UV coating step (S1), printing primer layer coating step (S2), printing step (S3), washing primer layer It consists of seven steps of coating process (S4), deposition process (S5), cleaning process (S6), and adhesive application process (S7).

The first step is a UV hard coating step (S1), which is a step of forming a UV hard coating layer 13 by applying a coating on the upper surface of the base film 11, and then irradiated with ultraviolet rays to cure. The UV hard coating process (S1) is a process by a micro gravure coating method, the coating is applied to the upper surface of the base film 11 and then irradiated with ultraviolet light to cure. The use of the above-mentioned complete curing method by ultraviolet absorption is because the effect of very high solvent resistance and weather resistance after curing can be obtained. That is, in the case of the uncured or semi-cured method, not by the curing method by ultraviolet light, it is highly likely to be partially mixed with the coating primer 14 coating liquid to be laminated thereafter, and when mixed, the UV hard coating layer 13 This is because the inherent flexibility and hardness are very likely to deteriorate.

In addition, the coating agent comprises a silicon dioxide and a siloxane compound of nanoparticles, which is to allow the UV hard coating layer 13 to have a predetermined release property. That is, when the UV hard coating layer 13 is formed on the upper surface of the base film 11, there is a problem that the mold release is not released during the subsequent transfer process due to the adhesion. Can be solved. Therefore, even if the UV hard coating layer 13 is formed directly on the base film 11 without forming a separate release agent layer on the base film 11, mold release is possible in a subsequent transfer process due to the characteristics of the UV hard coating layer 13. Become. The coating agent including the silicon dioxide and the siloxane compound of the nanoparticles has a structure in which the siloxane compound is bonded to the silicon of the nanoparticles as shown in FIG. 4. 4 is a view showing the structural formula of the coating agent used in the UV hard coating process. Therefore, as the UV hard coating layer 13 contains a large amount of silicon components, the UV hard coating layer 13 has a predetermined release property, so that the base film 11 and the UV hard coating layer 13 can be easily released. Since the process of forming a separate release agent layer is unnecessary, the number of processes is reduced. In addition, the elasticity and flexibility of the UV hard coating layer 13 may be increased due to the silicon component contained in the UV hard coating layer 13, and thus it may be applied to an injection molding having various bends. In addition, cracks of the cured resin may be generated in the bent portion when the hardness of the general acrylic resin is to be strengthened, and the cracks may be prevented even if the hardness is enhanced by the silicone component contained in the UV hard coating layer 13. have.

In addition, in the case of forming the UV hard coating layer 13 by the UV hard coating step (S1), it is preferable to have a thickness of 2 to 15㎛, more preferably to have a thickness of 4 to 10㎛, 5 ~ It is even more preferable to form to have a thickness of 9 μm. This is because when the UV hard coating layer 13 has a thickness of 2 μm or less, the thickness of the UV hard coating layer 13 is difficult to be realized, and when the UV hard coating layer 13 has a thickness of 15 μm or more, the UV hard coating layer 13 is too thick. This is because there is a fear that the blocking and cracking phenomenon may occur in a continuous process after being thick, and when the UV hard coating layer 13 has a thickness of 5 to 9 μm, the rainbow phenomenon may be partially improved.

The printing primer layer coating process (S2) is a UV hard coating layer to improve the absorbency of the ink used in the printing layer 15 is subsequently laminated and to enhance the adhesion between the UV hard coating layer 13 and the printing layer 15 ( It is a step of forming the print primer layer 14 on the entire upper surface of the 13). The printing primer layer coating process (S2) is a process of applying a coating agent consisting of an acrylic polyol or urethane copolymer, drying at 100 ° C. for 10 seconds, and aging at 40 ° C. for 24 hours, and the printing primer layer 14 is multi- It is coated using a color gravure printing machine (Multi-color Gravuer Printing Machine), it is preferably formed to have a thickness of 1.0 ~ 1.5㎛.

On the other hand, during the printing primer layer coating process (S2) it is desirable to have the printing primer layer 14 has a predetermined refractive index with the UV hard coating layer 13, this is to improve the Rainbow (RainBow) phenomenon. That is, the UV hard coating layer 13 has a flat outer surface, and when the external surface is reflected at an angle, an oil-shaped rainbow phenomenon may occur on the surface, and a printing primer may be used to offset the rainbow phenomenon. A refractive index difference is provided between the layer 14 and the UV hard coat layer 13, and in some cases, small particles (100 nm to 3 μm) are mixed between the UV hard coat layer 13 and the print primer layer 14. can do. At this time, when the difference in refractive index is less than 0.003, since the rainbow manifestation is not improved, the difference in refractive index is preferably at least 0.003 or more.

The printing process S3 is a process of forming the printing layer 15 partially on the upper surface of the printing primer layer 14. Various designs, characters or trademarks are provided through the printing layer 15 formed by the printing process S3. Etc. can be represented in various colors. This printing process (S3) is a process of drying for 10 seconds at 100 ℃ and aged for 24 hours at 40 ℃ after applying the ink agent, the printing layer 15 is a multi-color gravure printing machine (Multi-color Gravuer Printing Machine) It is printed using a multi-color gravure printing printing machine is operated at a predetermined printing frequency, preferably formed to have a thickness of 1.0 ~ 1.5㎛. Here, the ink agent used in the printing process (S3) preferably comprises 25 parts by weight of pigment, 15 parts by weight of synthetic resin, 5 parts by weight of hardener, and the curing agent is a synthetic resin containing about 40% by weight of urethane copolymer. It is more preferable that it consists of.

The cleaning primer layer coating process S4 forms a hydrophilic washing primer layer 21 partially on the upper surface of the printing layer 15 formed by the printing process S3 so that the metal can be deposited only on the required portion. Process, the cleaning primer layer 21 is washed off by the cleaning process (S6) and then peeled off. The washing primer layer coating step (S4) is a coating agent consisting of a hydrophilic polyvinylacetate binder resin and barium sulfate added to the binder resin so that it can be easily peeled off when washed by water in the washing step (S6). After the coating on the upper surface of the printing layer 15 is unnecessary, the process proceeds to drying at 100 ℃ for 10 seconds and aged at 40 ℃ for 24 hours. The washing primer layer 21 is coated using a multi-color gravure printing machine, which is operated at a predetermined printing frequency in the multi-color gravure printing machine, and is formed to have a thickness of 1.0 to 1.5 μm. desirable.

The deposition process S5 is a process of forming the deposition layer 17 by vacuum depositing a metal or a metal compound on the upper surface of the printing layer 15. Here, vacuum deposition is a method of forming a thin film by evaporating a metal or a metal compound in a vacuum state, and materials that can be used for deposition include Al, Cu, Cr, Ag, and Al is generally used. On the other hand, since the cleaning primer layer 21 is formed on the portion of the upper surface of the printing layer 15 that is not required to be deposited, it can be easily deposited on the necessary portion, but in the process of vacuum deposition, the cleaning primer layer 21 The deposition layer 17 may also be formed on the top surface. However, since the portion which is vacuum-deposited on the upper surface of the cleaning primer layer 21 is washed together with the cleaning primer layer 21 in the cleaning process S6, the deposition layer (only on the portion necessary for the upper surface of the printing layer 15) 17) can be formed. On the other hand, the deposition layer 17 is preferably formed to have a thickness of 0.01 ~ 0.2㎛.

The cleaning process S6 is a process of washing and removing the cleaning primer layer 21 with water so that only the deposition layer 17 remains on the print layer 15 after the deposition process S5. At this time, since the coating agent forming the cleaning primer layer 21 is hydrophilic as described above, the coating agent is easily peeled off by washing with water, and the deposition layer 17 on the upper surface of the cleaning primer layer 21 is also peeled off. . However, the deposition layer 17 on the upper surface of the print layer 15 is left without peeling off during the cleaning process (S6) due to the adhesion to the print layer 15.

Adhesive coating process (S7) is a process of forming a hot melt adhesive layer 19 on the upper surface of the printing primer layer 14 and the deposition layer 17 to increase the adhesive strength of the insert molding printing film and the injection molding. . This adhesive coating process (S7) is a process of applying a polyester-based hot melt adhesive and then drying for 30 seconds at 100 ℃, the hot melt adhesive layer 19 is coated using a micro gravure coating method or multi-color gravure printing rotary press It is preferably formed to have a thickness of 2.0㎛ 3.5㎛.

A process of manufacturing the insert molding print film by the method of manufacturing the insert molding print film of FIG. 1A will be briefly described with reference to FIG. 1B. First, the UV hard coating layer 13 is formed on the upper surface of the base film 11. Forming a (S1), to form a printing primer layer 14 on the upper surface of the UV hard coating layer (13) (S2). Then, the print layer 15 is partially formed on the print primer layer 14 (S3), and the wash primer layer 21 is formed partially on the upper surface of the print layer 15 where no deposition is required ( S4), the deposition layer 17 is formed by vacuum depositing a metal or metal compound on the upper surface of the printing layer 15 (S5). Then, when the washing primer layer 21 is washed off with water, only the deposition layer 17 remains on the upper surface of the printing layer 15 (S6), and then the hot melt adhesive layer 19 is printed primer layer 14 ), If the print layer 15 and the deposition layer 17 are formed on the upper surface (S7), the manufacturing of the insert molding print film is completed.

Figure 2a and Figure 2b is a cross-sectional view showing a manufacturing process and a manufacturing process of the insert molding printing film for another embodiment of the manufacturing method of the insert molding printing film according to the present invention. As shown in Figure 2a and 2b, the manufacturing method of the insert molding printing film according to the present invention is a UV hard coating step (S1), printing primer layer coating step (S2), printing step (S3), deposition primer layer The coating step (S3 '), the cleaning primer layer coating step (S4), the deposition step (S5), the cleaning step (S6), the adhesive coating step (S7) of the eight steps of the process. Here, the UV hard coating step (S1), the printing primer layer coating step (S2), the printing step (S3), the cleaning step (S6) is the case of the manufacturing method of the insert molding printing film of FIG. Since this is the same, a description thereof will be omitted.

The deposition primer layer coating process (S3 ′) forms a deposition primer layer 16 on the upper surface of the printing layer 15 that has undergone the printing process (S3), and then cleans by strengthening the adhesion of the metal component during the deposition process (S5). This is a step for preventing the deposition layer 17 from peeling off at the step S6. The deposition primer layer coating process (S3 ') is a process of applying a coating agent consisting of a curing agent containing 80% by weight of a synthetic resin and a urethane copolymer, drying at 100 ° C. for 10 seconds, and aging at 40 ° C. for 24 hours. The primer layer 16 is coated using a multi-color gravure printing machine, which is operated at a predetermined printing frequency in the multi-color gravure printing machine, and is preferably formed to have a thickness of 1.0 to 1.5 μm. .

The deposition primer layer 16 is formed on the upper surface of the printing layer S3 through the deposition primer layer coating process S3 ′, and then the upper surface of the deposition primer layer 16 during the cleaning primer layer coating process S4. The hydrophilic washing primer layer 21 is partially formed on the substrate, and the metal or metal compound is vacuumed except for the portion where the washing primer layer 21 is formed on the upper surface of the deposition primer layer 16 during the deposition process S5. The deposition is performed to form the deposition layer 17. In addition, the hot melt adhesive layer is formed on the upper surface of the printing primer layer 14, the printing layer 15, the deposition primer layer 16, and the deposition layer 17 in the adhesive coating process S7. On the other hand, since the general technical characteristics of the washing primer layer coating process (S4), the deposition process (S5) and the adhesive coating process (S7) is the same as the manufacturing method of the insert molding printing film of Figure 1a described above The description will be omitted.

Referring to FIG. 2B, a process of manufacturing the insert molding print film by the method of manufacturing the insert molding print film of FIG. 2A will be described first. First, the UV hard coating layer 13 on the upper surface of the base film 11 will be described. Forming a (S1), to form a printing primer layer 14 on the upper surface of the UV hard coating layer (13) (S2). Then, the print layer 15 is partially formed on the print primer layer 14 (S3), and the deposition primer layer 16 is formed on the upper surface of the print layer 15 (S3 '). Then, the cleaning primer layer 21 is partially formed on the portion of the top surface of the deposition primer layer 16 that is not required to be deposited (S4), and the cleaning primer layer 21 is formed on the top surface of the deposition primer layer 16. The deposition layer 17 is formed by vacuum depositing a metal or a metal compound on a portion except the formed portion (S5). Then, when the washing primer layer 21 is washed off with water, only the deposition layer 17 remains on the upper surface of the deposition primer layer 16 (S6), and then the hot melt adhesive layer 19 is replaced with the printing primer layer ( 14), if the printed layer 15, the deposition primer layer 16 and the upper surface of the deposition layer 17 is formed (S7) manufacturing of the insert molding printing film is completed.

Figure 3a and Figure 3b is a cross-sectional view showing a manufacturing process and a manufacturing process of the insert molding printing film for another embodiment of the manufacturing method of the insert molding printing film according to the present invention. As shown in Figure 3a and 3b, the manufacturing method of the insert molding printing film according to the present invention is UV hard coating step (S1), printing primer layer coating step (S2), printing step (S3), deposition primer layer By 9 steps of coating process (S3 '), washing primer layer coating process (S4), deposition process (S5), cleaning process (S6), antioxidant treatment process (S6'), adhesive application process (S7) Is done. Here, UV hard coating step (S1), printing primer layer coating step (S2), printing step (S3), deposition primer layer coating step (S3 '), washing primer layer coating step (S4), deposition step (S5), Since the cleaning step S6 has the same technical features as in the case of the method of manufacturing the insert molding printing film of FIG. 2A, description thereof will be omitted.

The anti-oxidation process S6 ′ is a process of forming the anti-oxidation layer 18 on the upper surface of the deposition layer 17 to prevent oxidation of the deposition layer 17 formed through the deposition process S7. . The anti-oxidation process (S6 ') is a process of applying a coating agent made of a polyvinyl chloride-based binder resin and drying at 100 ° C. for 30 seconds, and the anti-oxidation layer 18 is a micro gravure coating method or multi-color gravure printing. It is preferably coated to use a rotary press and formed to have a thickness of 1.0 μm to 1.5 μm.

The anti-oxidation layer 18 is formed on the upper surface of the deposition layer 17 through the anti-oxidation process (S6 ′), so that during the adhesive application process (S9), the hot melt adhesive layer 19 is printed primer layer 14. The upper surface of the printed layer 15, the deposition primer layer 16, and the antioxidant layer 18 is formed. On the other hand, since the general technical features of the adhesive coating step (S7) is the same as in the case of the manufacturing method of the insert molding printing film of Figure 1a described above, a detailed description thereof will be omitted.

The process of manufacturing the insert molding printing film by the method of manufacturing the insert molding printing film of FIG. 3A will be described with reference to FIG. 3B. First, the UV hard coating layer 13 is formed on the upper surface of the base film 11. Forming a (S1), to form a printing primer layer 14 on the upper surface of the UV hard coating layer (13) (S2). Then, the print layer 15 is partially formed on the print primer layer 14 (S3), and the deposition primer layer 16 is formed on the upper surface of the print layer 15 (S3 '). Then, the cleaning primer layer 21 is partially formed on the portion of the top surface of the deposition primer layer 16 that is not required to be deposited (S4), and the cleaning primer layer 21 is formed on the top surface of the deposition primer layer 16. The deposition layer 17 is formed by vacuum depositing a metal or a metal compound on a portion except the formed portion (S5). Then, when the cleaning primer layer 21 is washed off with water, only the deposition layer 17 remains on the upper surface of the deposition primer layer 16 (S6). Then, to prevent the oxidation of the deposition layer 17 to form an antioxidant layer 18 on the upper surface of the deposition layer 17 (S6 '), and then hot melt adhesive layer 19 to the printing primer layer 14, If the print layer 15, the deposition primer layer 16 and the anti-oxidation layer 18 is formed on the upper surface (S7) the manufacturing of the insert molding printing film is completed.

Looking at the process of attaching the injection molding printing film prepared by the manufacturing process of Figure 1a to 3b described above to the injection molded article, after the insert molding printing film to the molded article through the hot melt adhesive layer 19 When the base film 11 is peeled off, the attachment of the insert molding print film is completed. On the other hand, when the insert molding print film is to be made at the same time as the injection molding, the base film 11 is placed in the lower mold so that the insert molding printing film and lowering the upper mold so as to face the inside of the lower mold Injection molding of the molding film can be bonded to the molding molded part at the same time molding, the adhesive force of the hot melt adhesive layer 19 at this time can be more firm. Then, after lifting the upper mold and removing the molded product from the lower mold, the base film 11 is peeled off from the UV hard coating layer 13, thereby completing the attachment of the insert molding printing film to the molded product.

5a and 5b is a cross-sectional view showing a manufacturing process and a manufacturing process of the insert molding printing film for another embodiment of the manufacturing method of the insert molding printing film according to the present invention. As shown in Figure 5a and 5b, the manufacturing method of the insert molding printing film according to the present invention is a release treatment step (S10), UV hard coating step (S20), printing primer layer coating step (S30), printing process (S40), deposition primer layer coating step (S50), cleaning primer layer coating step (S60), deposition step (S70), cleaning step (S80), antioxidant treatment step (S90), adhesive coating step (S100) 10 It consists of a process of steps. Here, the printing primer layer coating process (S30), the printing process (S40), the deposition primer layer coating process (S50), the cleaning primer layer coating process (S60), the deposition process (S70), the cleaning process (S80), anti-oxidation treatment Step (S90), the adhesive coating step (S100) is the same as the technical features of the manufacturing method of the insert molding printing film of Figure 3a described above and will not be described, and will be omitted below, release process (S10), UV Only the hard coating process (S20) will be described.

The release process S10 may be performed so that the base film 11 made of PET (polyethylene terephthalate) or PC (polycarbonate) may be easily peeled off after the printing film for insert molding is transferred or simultaneously with injection molding. It is a process of forming the release agent layer 12 on the entire surface of the base film (11). That is, when a coating agent that is not provided with releasability is used in the hard coating process, a problem may not occur in a subsequent transfer process due to adhesion between the base film and the hard coating layer. 12) to form. Here, in the case of forming the release agent layer 12 on the upper surface of the base film 11, a coating agent including a melamine resin-based release agent and a curing agent composed of P-toluenesulphonic acid is applied to the entire upper surface of the base film 11. After the melamine is cured for 30 seconds at about 100 ~ 160 ℃ temperature conditions for reacting with each other, the release agent layer (2) is 1 to 2 days at 40 to 60 ℃ to remove the unreacted monomer It may be cured by aging. Meanwhile, in addition to the release agent of the melamine resin, a silicone resin release agent, a fluorine resin release agent, a cellulose-induced release agent, a polyolefin resin release agent, and a complex release agent thereof may be used. In addition, the release agent layer 12 may be made of a mixture of modified siloxane acrylate, modified siloxane acrylate and wax. The release process (S10) is a process is carried out by a micro gravure (Micro Gravuer) coating method, the release agent layer 12 is preferably formed to have a thickness of 0.1 ~ 1.0㎛. As such, the release agent layer 12 formed on the base film 11 is peeled off together with the base film 11 after the insert molding printing film is adhered to the injection molded article.

UV hard coating process (S20) is a process of forming a UV hard coating layer 13 'on the upper surface of the release agent layer 12 formed through the release process (S10), the film of the exposed to the outside of the injection molded article It is a process for preventing the occurrence of scratches and to improve the UV weather resistance to the injection after the transfer. Since the UV hard coating process (S20) is the same as the coating method and the manufacturing method of the insert molding printing film of Figure 1a described above will be omitted.

The coating agent used in the UV hard coating process (S20) preferably comprises a compound having an acrylic copolymer and a siloxane structure, where silane may be used as the compound having a siloxane structure. Since the siloxane structure used in this case generally has a structure connected to the acrylic copolymer and the reactor, the UV hard coating layer 13 'is connected to the Si structure and has excellent flexibility, thereby preventing cracking during injection. Can be. In addition, the coating agent further comprises a conductive polymer compound, more preferably made of 80 to 95 parts by weight of the acrylic copolymer, 5 to 20 parts by weight of the siloxane compound and 0.1 to 10 parts by weight of the conductive polymer compound. When the siloxane compound is 20 parts by weight or more, the flexibility of the UV hard coating layer 13 'is ensured, so that cracking of the injection molding does not occur, but the hardness of the UV hard coating layer 13' is lowered, resulting in a large amount of scratches due to external impact. When the siloxane compound is 5 parts by weight or less, the hardness of the injection molding is increased, but the flexibility during injection is reduced, causing a large amount of cracking. The conductive polymer compound has a structure that is connected to the acrylic copolymer and the reactor, through which charge can be implemented. Therefore, the chargeability is implemented in the UV hard coating layer 13 ′ exposed to the surface of the injection molded product, thereby preventing foreign matters from being mixed by static electricity prevention and contamination by changing the surface tension and the contact angle. When the conductive polymer compound is 10 parts by weight or more, the content of the conductive polymer compound to be implemented on the surface of the UV hard coating layer 13 ′ increases, so that the properties of chargeability and contact angle are excellent, but hardness is low. If the conductive polymer compound is less than 0.1 part by weight, it is very difficult to implement chargeability.

The process of manufacturing the insert molding print film by the method of manufacturing the insert molding print film of FIG. 5A is performed after the UV, except that the first process is a step (S10) of forming the release agent layer 12 on the base film. Since the hard coating layer (S20) to the adhesive coating step (S100) is the same as the manufacturing process of Figure 3b described above will be omitted a detailed description.

As described above, according to the manufacturing method of the insert molding printing film according to the present invention, by using a UV hard coating layer made of nanoparticles of silicon dioxide and siloxane compound, the UV hard coating layer is a fully hardened type, but high flexibility, injection molding In addition, when the transfer is simultaneously performed, the occurrence of cracks may be reduced, and a printing film for insert molding may be manufactured by using a highly flexible primer layer and a print layer, which may further reduce the occurrence of cracks during injection molding.

In addition, since a large amount of silicone components are included in the UV hard coating layer, the UV hard coating layer itself has a predetermined release property, and thus the base film and the UV hard coating layer can be easily released even without applying a separate release agent layer to the base film. This increase may not only be applicable to injection moldings having various bends, but also printing films for insert molding may be manufactured in which cracking may be prevented.

In addition, printability and adhesion may be improved by stacking a printing primer layer provided with functionality between the UV hard coating layer and the printing layer.

In addition, the pencil hardness of the UV hard coating layer is superior to about 4H or more, scratch generation can be prevented.

In addition, deposition may be improved by stacking a deposition primer layer on the printed layer.

In addition, by using a material having excellent flexibility in each coating layer applied to the printing film for insert molding, the adhesion to the curved portion of the injection molding can be improved.

In addition, by using a hot melt adhesive layer, there is no drying process, the working space is small and the adhesion speed is high, the production line can be automated as well as productivity can be increased.

Claims (16)

A UV hard coating step of applying a coating agent including nanoparticles of silicon dioxide and a siloxane compound on the upper surface of the base film, and then curing by irradiating UV light to form a UV hard coating layer; A printing primer layer coating process of forming a printing primer layer on the entire surface of the upper surface of the UV hard coating layer so as to enhance adhesion between the UV hard coating layer and the printing layer laminated thereafter; A printing step of forming a printing layer partially on an upper surface of the printing primer layer; A washing primer layer coating process of forming a hydrophilic washing primer layer partially on an upper surface of the printing layer; A deposition process of forming a deposition layer by vacuum depositing a metal or a metal compound except a portion where the cleaning primer layer is formed on an upper surface of the printing layer; A washing step of washing off the washing primer layer with water; Adhesive printing step of forming a hot melt adhesive layer on the upper surface of the printing primer layer, the printing layer and the deposition layer; manufacturing method of a printing film for insert molding comprising a. A UV hard coating step of applying a coating agent including nanoparticles of silicon dioxide and a siloxane compound on the upper surface of the base film, and then curing by irradiating UV light to form a UV hard coating layer; A printing primer layer coating process of forming a printing primer layer on the entire surface of the upper surface of the UV hard coating layer so as to enhance adhesion between the UV hard coating layer and the printing layer laminated thereafter; A printing step of forming a printing layer partially on an upper surface of the printing primer layer; A deposition primer layer coating process of forming a deposition primer layer so that adhesion of the deposition layer deposited on the upper surface of the printing layer is enhanced; A washing primer layer coating process of forming a hydrophilic washing primer layer partially on an upper surface of the deposition primer layer; A deposition process of forming a deposition layer by vacuum depositing a metal or a metal compound except a portion where the cleaning primer layer is formed on an upper surface of the deposition primer layer; A washing step of washing off the washing primer layer with water; And an adhesive coating step of forming a hot melt adhesive layer on the printed primer layer, the print layer, the deposition primer layer, and the upper surface of the deposition layer. A UV hard coating step of applying a coating agent including nanoparticles of silicon dioxide and a siloxane compound on the upper surface of the base film, and then curing by irradiating UV light to form a UV hard coating layer; A printing primer layer coating process of forming a printing primer layer on the upper surface of the UV hard coating layer so as to enhance adhesion between the UV hard coating layer and the printing layer laminated thereafter; A printing step of forming a printing layer partially on an upper surface of the printing primer layer; A deposition primer layer coating process of forming a deposition primer layer so that adhesion of the deposition layer deposited on the upper surface of the printing layer is enhanced; A washing primer layer coating process of forming a hydrophilic washing primer layer partially on an upper surface of the deposition primer layer; A deposition process of forming a deposition layer by vacuum depositing a metal or a metal compound except a portion where the cleaning primer layer is formed on an upper surface of the deposition primer layer; A washing step of washing off the washing primer layer with water; An oxidation treatment process of forming an antioxidant layer on an upper surface of the deposition layer to prevent oxidation of the deposition layer; Adhesive printing process for forming a hot melt adhesive layer on the upper surface of the printing primer layer, the printing layer, the deposition primer layer and the anti-oxidation layer; manufacturing method of a printing film for insert molding comprising a. The method according to any one of claims 1 to 3, The printing primer layer coating process is a method of manufacturing a printing film for insert molding, characterized in that the coating is made of an acrylic polyol or urethane copolymer after drying at 100 ℃ for 10 seconds and aged at 40 ℃ for 24 hours. The method according to any one of claims 1 to 3, The printing primer layer coating process is a method of manufacturing a print film for insert molding, characterized in that the printing primer layer is formed to have a predetermined refractive index with the UV hard coating layer so that the rainbow phenomenon can be improved. The method according to any one of claims 1 to 3, The printing process is an insert molding printing, characterized in that the coating is applied to the ink agent consisting of 25 parts by weight of pigment, 15 parts by weight of synthetic resin and 5 parts by weight of curing agent, and then dried at 100 ° C for 10 seconds and aged at 40 ° C for 24 hours Method for producing a film. The method according to claim 2 or 3, The deposition primer layer coating process is a step of applying a coating agent consisting of a curing agent containing 80% by weight of a synthetic resin and a urethane copolymer is dried for 10 seconds at 100 ℃ and aged for 24 hours at 40 ℃ Manufacturing method of printing film. The method according to any one of claims 1 to 3, The washing primer layer coating process is a process of applying a coating agent consisting of a polyvinyl acetate-based binder resin and barium sulfate added to the binder resin, drying at 100 ° C. for 10 seconds and aging at 40 ° C. for 24 hours. Method of manufacturing a printing film for insert molding. The method of claim 3, The anti-oxidation process is a method of manufacturing a printing film for insert molding, characterized in that the coating process consisting of a polyvinyl chloride-based binder resin and then drying at 100 ℃ for 30 seconds. The method according to any one of claims 1 to 3, The adhesive coating process is a method of manufacturing a printing film for insert molding, characterized in that the process of drying for 30 seconds at 100 ℃ after applying the polyester-based hot melt adhesive. A release treatment step of forming a release agent layer on the entire surface of the base film; UV hard coating step of forming a UV hard coating layer on the entire surface of the release agent layer; A printing primer layer coating process of forming a printing primer layer on the entire surface of the upper surface of the UV hard coating layer so as to enhance adhesion between the UV hard coating layer and the printing layer laminated thereafter; A printing step of forming a printing layer partially on an upper surface of the printing primer layer; A washing primer layer coating process of forming a hydrophilic washing primer layer partially on an upper surface of the printing layer; A deposition process of forming a deposition layer by vacuum depositing a metal or a metal compound except a portion where the cleaning primer layer is formed on an upper surface of the printing layer; A washing step of washing off the washing primer layer with water; Adhesive printing step of forming a hot melt adhesive layer on the upper surface of the printing primer layer, the printing layer and the deposition layer; manufacturing method of a printing film for insert molding comprising a. The method of claim 11, And a deposition primer layer coating process of forming a deposition primer layer on the upper surface of the printing layer after the printing process and before the cleaning primer layer coating process so that the adhesion of the deposition layer formed by the deposition process is enhanced. Method for producing a printing film for insert molding characterized in that. The method of claim 12, After the cleaning process and before the adhesive coating process, the insert molding printing, characterized in that it further comprises an antioxidant treatment step of forming an antioxidant layer on the upper surface of the deposition layer to prevent oxidation of the metal component of the deposition layer. Method for producing a film. The method according to any one of claims 11 to 13, The mold release process is to prepare a printing film for insert molding, characterized in that the coating agent consisting of a release agent of the melamine resin and a curing agent consisting of P-toluenesulphonic acid and then dried at 100 to 160 ℃ for 30 seconds to cure. Way. The method according to any one of claims 11 to 13, The UV hard coating process is a method of manufacturing a printing film for insert molding, characterized in that the coating process consisting of an acrylic copolymer, a siloxane compound and a conductive high molecular compound and then irradiated with ultraviolet light to cure. The method of claim 15, The acrylic copolymer, the siloxane compound and the conductive polymer compound are 80 to 95 parts by weight, 5 to 20 parts by weight and 0.1 to 10 parts by weight of the manufacturing method of the printing film for insert molding.

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