Decorative film for insert molding, method for manufacturing decorative film for insert molding, and method for manufacturing resin molded product

Abstract

The present invention provides a kind of insert molding decorative film, the size accuracy of gravure printed pattern layer and light transmission pattern layer is high, the flow of gravure printed ink of polycarbonate resin molded product can be inhibited.In the multilayer film (20) that can transmit visible light, a first polycarbonate resin layer (22) composed of polycarbonate resin is arranged between a first acrylic resin layer (21) and a second acrylic resin layer (23).The gravure printing layer (30) has a pattern layer (31) that depicts a pattern by gravure printing.The first backing film (40) is composed of ABS resin that can transmit visible light.The second backing film (50) is formed by arranging a second polycarbonate resin layer (52) composed of polycarbonate resin between a third acrylic resin layer (51) and a fourth acrylic resin layer (53).The light transmission pattern layer (32) is arranged in a manner that visible light can transmit the specified part of pattern layer.

Description

TECHNICAL FIELD

[0001] The present application relates to a decoration film for insert molding, a method for manufacturing a decoration film for insert molding, and a method for manufacturing a resin molded product, and particularly relates to a decoration film for insert molding having a pattern of gravure printing for decoration that transmits visible light, a method for manufacturing a decoration film for insert molding, and a method for manufacturing a resin molded product. BACKGROUND

[0002] In the existing decoration film for insert molding, as described in Patent Document 1 (Japanese Patent Application Publication No. 2008-80570), a PMMA (polymethyl methacrylate) film on which a pattern for decoration is printed is disposed on a surface. In addition, the existing decoration film for insert molding, in order to maintain the form of the PMMA film, sometimes integrates a cushion layer composed of an ABS-based resin with the PMMA film.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENTS

[0005] Patent Document 1: Japanese Patent Application Publication No. 2008-80570 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the case where the PMMA film is printed with a pattern by gravure printing, the film is stretched and shrunk by a drying process of the gravure printing. In particular, in the case where a pattern layer and a light-transmitting pattern layer that transmits visible light and is in the same position as the pattern layer are formed by gravure printing, the dimensional accuracy of the pattern layer and the light-transmitting pattern layer deteriorates due to the stretching and shrinking of the PMMA film by the drying process of the gravure printing.

[0008] In addition, in the manufacturing of a resin molded product made of polycarbonate, when a decoration film for insert molding having a cushion layer composed of an ABS-based resin is used, the cushion layer composed of the ABS-based resin having low heat resistance cannot sufficiently prevent heat and pressure at the time of injection molding from affecting the gravure printing layer. Therefore, ink flow of gravure ink of the gravure printing layer occurs in the decoration film for insert molding having the cushion layer composed of the ABS-based resin.

[0009] The present application has an object to provide a decoration film for insert molding in which the dimensional accuracy of a pattern layer and a light-transmitting pattern layer of gravure printing is high and ink flow of gravure printing is suppressed at the time of manufacturing a resin molded product made of polycarbonate.

[0010] MEANS FOR SOLVING THE PROBLEMS

[0011] The following describes a plurality of modes as means for solving the technical problem. These modes can be arbitrarily combined as needed.

[0012] One technical solution of the present application relates to an insert molding decoration film. The insert molding decoration film is a film that is three-dimensionally shaped before insert molding. The insert molding decoration film has a multilayer film, a gravure printing layer, a first backing film, a second backing film, and a light-transmitting pattern layer. The multilayer film has a first main surface and a second main surface, and a first polycarbonate resin layer composed of a polycarbonate resin is disposed between a first acrylic resin layer and a second acrylic resin layer composed of an acrylic resin. The multilayer film transmits visible light. The gravure printing layer is disposed on the first main surface side of the multilayer film and has a pattern layer in which a pattern of gravure printing is formed. The first backing film is disposed on the opposite side of the multilayer film across the gravure printing layer and is composed of an ABS resin that transmits visible light. The first backing film transmits visible light. The second backing film is disposed on the opposite side of the multilayer film across the first backing film and is formed by disposing a second polycarbonate resin layer composed of a polycarbonate resin between a third acrylic resin layer and a fourth acrylic resin layer composed of an acrylic resin. The second backing film transmits visible light. The light-transmitting pattern layer has a light-transmitting pattern that transmits visible light. The light-transmitting pattern of the light-transmitting pattern layer is disposed so as to pass through a prescribed portion of the pattern of the pattern layer with visible light.

[0013] In the insert molding decoration film having such a structure, the multilayer film has the first polycarbonate resin layer disposed between the first acrylic resin layer and the second acrylic resin layer, and the second backing film has the second polycarbonate resin layer disposed between the third acrylic resin layer and the fourth acrylic resin layer. By the multilayer structure of the multilayer film, shrinkage at the time of drying of printing when the gravure printing layer is formed can be suppressed, and by the multilayer structure of the multilayer film and the second backing film, shrinkage at the time of heat lamination can be suppressed, so the dimensional accuracy of the light-transmitting pattern layer and the pattern layer of the gravure printing is improved. In addition, by the multilayer structure of the second backing film, the heat resistance of the second backing film can be improved, and the flow of the ink of the gravure printing at the time of molding of a resin product made of polycarbonate can be suppressed. In addition, by the ABS resin of the first backing film, damage to the gravure ink by heat can be reduced.

[0014] Furthermore, in the present specification, polycarbonate means that a polycarbonate resin is used as a material for injection molding.

[0015] In the above-described insert molding decoration film, the first polycarbonate resin layer and the second polycarbonate resin layer can be composed of a polycarbonate resin having a glass transition temperature of 120°C or higher and 200°C or lower. The insert molding decoration film thus configured can sufficiently improve the heat resistance of the multilayer film and the second backing film.

[0016] In the above-mentioned insert molding decorative film, the specific heat of the first backing film can be 1.3 x 10 3 J / (kg·K) or more and 1.7 x 10 3 J / (kg·K) or less. The insert molding decorative film thus configured has a high specific heat of the first backing film, and can reduce damage to the gravure ink due to heat.

[0017] In the above-mentioned insert molding decorative film, the light-transmissive pattern layer can be included in the gravure printing layer. The insert molding decorative film thus configured can improve the dimensional accuracy of the light-transmissive pattern layer of the gravure printing layer.

[0018] In the above-mentioned insert molding decorative film, the light-transmissive pattern layer can be formed on the second backing film. The insert molding decorative film thus configured can prevent the light-transmissive pattern layer from being affected by heat lamination, and can improve the dimensional accuracy of the light-transmissive pattern layer.

[0019] One technical solution of the present application relates to a method for manufacturing an insert molding decorative film. The method for manufacturing the insert molding decorative film has a first step of forming a gravure printing layer by gravure printing on a first main surface side of a multilayer film composed of a first acrylic resin layer composed of an acrylic resin and a second acrylic resin layer composed of an acrylic resin, and a second step of heat laminating a second backing film and the multilayer film on which the gravure printing layer is formed. In the second step, a release film is brought into contact with a first contact heating body, the second backing film is brought into contact with the release film, the first backing film is brought into contact with the second backing film, and the multilayer film on which the gravure printing layer is formed is brought into contact with the first backing film, and heat is applied from the first contact heating body to heat laminate the release film, the second backing film, the first backing film, and the multilayer film. The release strength of the release film when peeled from the first contact heating body during heat lamination is lower than the release strength of the second backing film when peeled from the first contact heating body during heat lamination.

[0020] In the manufacturing method of the insert-molding-use decorative film thus configured, in the second step, since the peeling film is in contact with the first contact heating body and the second backing film is in contact with the peeling film, the second backing film can be prevented from being directly in contact with the first contact heating body. Therefore, when the insert-molding-use decorative film is peeled from the first contact heating body by heat lamination, the force with which the insert-molding-use decorative film is stretched by the first contact heating body is weakened compared to the case where the second backing film is directly in contact with the first contact heating body. As a result, the pattern distortion in the gravure print layer due to the force with which the insert-molding-use decorative film is stretched by the first contact heating body can be suppressed.

[0021] The second step of the manufacturing method of the insert-molding-use decorative film described above can be configured to include a first heat lamination step and a second heat lamination step. In the first heat lamination step, the first backing film and the second backing film are heat laminated to form a multilayer backing film in a state where the first backing film is in contact with the second contact heating body and the second backing film is in contact with the first backing film. In the second heat lamination step, the peeling film, the multilayer backing film, and the multilayer film are heat laminated by heat applied from the first contact heating body in a state where the peeling film is in contact with the first contact heating body, the second backing film of the multilayer backing film is in contact with the peeling film, and the multilayer film in which the gravure print layer is formed is in contact with the first backing film of the multilayer backing film. In the manufacturing method of the insert-molding-use decorative film thus configured, the number of rollers required for the laminator can be reduced.

[0022] In the manufacturing method of the insert-molding-use decorative film described above, in the first step, it can be configured in such a manner that heat treatment is performed at a temperature higher than the evaporation temperature of the solvent of the gravure ink used to form the gravure print layer after printing of the gravure print layer. In the manufacturing method of the insert-molding-use decorative film thus configured, the residual solvent can be reduced, and the foaming at the time of molding can be suppressed.

[0023] The manufacturing method of the resin molded product according to one aspect of the present application includes a molding step of three-dimensionally molding the insert-molding-use decorative film described above, a trimming step of trimming and removing an unnecessary portion of the insert-molding-use decorative film to which a three-dimensional shape is imparted by the molding step, and an injection molding step of molding a resin molded product made of polycarbonate that is decorated with the insert-molding-use decorative film and transmits visible light by placing the insert-molding-use decorative film in a mold and injecting a polycarbonate-based resin into the mold.

[0024] In the manufacturing method of the resin molded product thus configured, the heat resistance of the first backing film and the second backing film can be improved by the multilayer structure of the second backing film, and the ink flow of the gravure print layer at the time of manufacturing the resin molded product made of polycarbonate that transmits visible light can be suppressed. The damage to the gravure ink of the gravure print layer due to heat can be alleviated by the ABS-based resin of the first backing film.

[0025] Inventive Effects

[0026] The insert molding decorative film according to the present application can achieve high dimensional accuracy of the gravure printed pattern layer and the light-transmissive pattern layer, and can suppress the flow of the gravure printed ink during the production of the polycarbonate resin molded article. The insert molding decorative film production method according to the present application is a production method suitable for the production of the insert molding decorative film according to the present application. In addition, the resin molded article production method according to the present application is a production method suitable for the production of the resin molded article using the insert molding decorative film according to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1A is a front view of a door of an automobile to which the insert molding decorative film of the first embodiment is applied.

[0028] FIG. 1B is a front view of a door of an automobile to which the insert molding decorative film of the first embodiment is applied.

[0029] FIG. 2 is a schematic cross-sectional view showing a state in which the insert molding decorative film is heated for molding.

[0030] FIG. 3 is a schematic cross-sectional view showing a state in which the insert molding decorative film is molded in three dimensions.

[0031] FIG. 4 is a schematic cross-sectional view showing a state in which the insert molding decorative film is trimmed.

[0032] FIG. 5 is a schematic cross-sectional view showing a state in which the insert molding decorative film is placed in a mold.

[0033] FIG. 6 is a schematic cross-sectional view showing a state in which molten resin is injected into the mold in which the insert molding decorative film is placed.

[0034] FIG. 7 is a schematic cross-sectional view showing a state in which the resin molded article integrated with the insert molding decorative film is taken out of the mold.

[0035] FIG. 8 is a schematic cross-sectional view showing an example of the structure of the insert molding decorative film of the first embodiment.

[0036] FIG. 9 is a schematic cross-sectional view showing an example of the structure of the multilayer film on which the gravure printed layer is printed.

[0037] FIG. 10 is a schematic cross-sectional view for explaining a first heat lamination step of heat laminating the first liner film and the second liner film.

[0038] FIG. 11 is a schematic cross-sectional view for illustrating a second heat lamination step of heat laminating the entire insert molding decorative film.

[0039] FIG. 12 is a schematic cross-sectional view showing a laminate of the insert molding decorative film and the PET film after heat lamination.

[0040] FIG. 13 is a schematic cross-sectional view showing another example of the structure of the multilayer film on which the gravure print layer is printed.

[0041] FIG. 14 is a schematic cross-sectional view showing another example of the structure of the multilayer film on which the gravure print layer is printed.

[0042] FIG. 15 is a schematic cross-sectional view showing an example of the structure of the insert molding decorative film of the second embodiment.

[0043] FIG. 16 is a schematic cross-sectional view showing an example of the structure of the multilayer film on which the gravure print layer is printed.

[0044] FIG. 17 is a schematic cross-sectional view for illustrating a second heat lamination step of heat laminating the entire insert molding decorative film.

[0045] FIG. 18 is a schematic cross-sectional view showing a laminate of the insert molding decorative film and the PET film after heat lamination.

[0046] FIG. 19 is a schematic view showing a step of cutting the insert molding decorative film.

[0047] FIG. 20 is a schematic cross-sectional view showing another example of the structure of the multilayer film on which the gravure print layer is printed.

[0048] FIG. 21 is a schematic cross-sectional view showing another example of the structure of the multilayer film on which the gravure print layer is printed. DETAILED DESCRIPTION

[0049] <First Embodiment>

[0050] (1) Application of the Insert Molding Decorative Film

[0051] In FIG. 1A and FIG. 1B , a door 100 of an automobile to which the insert molding decorative film is applied is shown. According to the comparison FIG. 1A and FIG. 1BAs can be seen, the door 100 is configured so that the portion of the door trim 110 on the inner side thereof displays the three stripe pattern 120 by visible light. The door trim 110 is a resin molded product decorated with the insert molding decorative film. On the back side of the door trim 110 provided with the pattern 120, for example, an illumination device (not shown) such as an LED controlled to be turned on or off by an automobile system (not shown) is disposed. The portion of the door trim 110 in which the pattern 120 is formed is manufactured, for example, by injection molding of a polycarbonate resin. The pattern 120 of the door 100 is formed on the door trim 110 by the insert molding decorative film described later.

[0052] (2) Method for manufacturing resin molded product using insert molding decorative film

[0053] In FIGS. 2-7 , an outline of a method for manufacturing a resin molded product using an insert molding decorative film 10 is shown. The insert molding decorative film 10 is a film used for three-dimensional molding before insert molding. For example, in the case of decorating a door trim 110, the insert molding decorative film 10 is a film that is molded in conformity with the three-dimensional shape of the door trim 110 and is inserted when the door trim 110 is injection molded.

[0054] As FIG. 2 and FIG. 3 indicate, the molding step is a step of three-dimensionally molding the insert molding decorative film 10. As FIG. 2 indicates, the insert molding decorative film 10 is placed in a mold 200. The insert molding decorative film 10 is heated and softened by a heat source 210. FIG. 2 The arrow shown indicates the heat applied to the insert molding decorative film 10. Also, as FIG. 3 indicates, the insert molding decorative film 10 is shaped into a product shape by the mold 200, for example, by vacuum forming or compressed air forming. FIG. 3 The arrow shown indicates the direction of the force applied to the insert molding decorative film 10 by vacuum forming or compressed air forming.

[0055] As FIG. 4 indicates, the trimming step is a step of trimming and removing unnecessary portions of the insert molding decorative film 10 given a three-dimensional shape by the molding step. Trimming is performed, for example, using a die cutter or a laser. FIG. 4 Shown is a die head 220 of a die cutter.

[0056] An example of an injection molding step is shown in FIGS. 5-7 . The injection molding step is a step of molding a polycarbonate resin molded product 90 decorated with the insert molding decorative film 10 by placing the insert molding decorative film 10 in a mold 230 and injecting a polycarbonate resin into the mold 230. In FIG. 5The image shows the state in which a three-dimensionally shaped decorative insert film 10 is placed in the mold 230. FIG. 5 The decorative film 10 for insert molding shown is placed on the mold 230 by the robotic arm 240. FIG. 5 The arrow indicates the direction of movement of the decorative film 10 for insert molding.

[0057] exist FIG. 6 The image shows the state in which molten resin 290, formed by heating and melting polycarbonate-based resin, is injected into the cavity 235 of the mold 230. The typical molding temperature (temperature of the molten resin 290) of the resin molded article 90 containing polycarbonate-based resin is 260°C to 320°C. In the insert molding decorative film 10 of the first embodiment, molding can be performed at a molding temperature of 300°C or higher. FIG. 6 The arrows in the diagram indicate the movement of the moving mold in mold 230 during mold closing. FIG. 7 The image shows the state where the mold 230 is opened, and the resin molded article 90 made of polycarbonate resin is taken out.

[0058] When the mold 230 opens, the robotic arm 240 enters and removes the resin molded product 90 to the outside of the mold 230. FIG. 7 The arrows shown on mold 230 indicate the direction of movement of the moving mold. The arrows shown around robotic arm 240 and resin molded article 90 indicate the direction of movement of resin molded article 90. An example of this resin molded article 90 is the aforementioned door trim 110.

[0059] (3) Structure of decorative film 10 for insert molding

[0060] like FIG. 8 As shown, the decorative film 10 for insert molding has a multilayer film 20, a gravure printing layer 30, a first backing film 40, and a second backing film 50. A first pattern 36 formed on the pattern layer 31 of the gravure printing layer 30 is disposed at a predetermined position on a resin molded article having a three-dimensional shape, namely, the door trim 110. A light-transmitting pattern 37 of a light-transmitting pattern layer 32 is disposed such that visible light Li passes through the first pattern 36 or the area surrounding the first pattern 36. In other words, the light-transmitting pattern 37 is disposed such that visible light passes through a predetermined portion of the pattern of the pattern layer 31. The light-transmitting pattern 37 is the pattern of the light-transmitting portion 32a, described later. Preferably, the offset between the first pattern and the light-transmitting pattern 37 is ±0.6 mm or less.

[0061] (3-1) Multilayer film 20

[0062] The multilayer film 20 has a first main surface 20a and a second main surface 20b. The multilayer film 20 is transparent to visible light. The thickness of the multilayer film 20 is, for example, 30 μm to 150 μm. The multilayer film 20 having a thickness of 30 μm to 150 μm is suitable for gravure printing. In this first embodiment, the thickness of the multilayer film 20 is set to, for example, 50 μm. The multilayer film 20 is a layer in which the first polycarbonate resin layer 22 is disposed between the first acrylic resin layer 21 and the second acrylic resin layer 23. The exposed surface of the first acrylic resin layer 21 is the first main surface 20a, and the exposed surface of the second acrylic resin layer 23 is the second main surface 20b.

[0063] The first acrylic resin layer 21 and the second acrylic resin layer 23 are composed of an acrylic resin. As the acrylic resin used for the first acrylic resin layer 21 and the second acrylic resin layer 23, for example, PMMA is used. In the present application, in the case where the first acrylic resin layer 21 and the second acrylic resin layer 23 are composed of an acrylic resin, not only a case where these layers are composed of only an acrylic resin is included, but also a case where an additive is added to the acrylic resin is included.

[0064] The first polycarbonate resin layer 22 is composed of a polycarbonate resin. As the polycarbonate resin used for the first polycarbonate resin layer 22, for example, polycarbonate resin is used. In the present application, in the case where the first polycarbonate resin layer 22 is composed of a polycarbonate resin, not only a case where this layer is composed of only a polycarbonate resin is included, but also a case where an additive is added to the polycarbonate resin is included. In order to suppress the shrinkage rate at the time of gravure printing, the thickness of the first polycarbonate resin layer 22 must be smaller than the thickness of the multilayer film 20, and is preferably 10 μm to 105 μm. In addition, the glass transition temperature (Tg) of the first polycarbonate resin layer 22 is, for example, 120°C to 200°C. In order to obtain high heat resistance, it is preferable that the glass transition temperature (Tg) be high, and it is preferable that the glass transition temperature (Tg) be 150°C to 200°C, and it is further preferable that the glass transition temperature (Tg) be 170°C to 200°C. Furthermore, the glass transition temperature (Tg) is measured in accordance with JIS 7121.

[0065] In the multilayer film 20, it is preferable that the shrinkage rates at the time of gravure printing in the feeding direction and the width direction of the multilayer film 20 are each suppressed to a range of -0.20% to +0.20%, and it is further preferable that the shrinkage rates are each suppressed to a range of -0.15% to +0.15%.

[0066] (3-2) Gravure printing layer 30

[0067] The gravure printed layer 30 is provided on the first main surface 20a side of the multilayer film 20. More specifically, the gravure printed layer 30 is formed by printing on the first main surface 20a (exposed surface of the first acrylic resin layer 21) of the multilayer film 20. The gravure printed layer 30 has a pattern layer 31, a light-transmissive pattern layer 32, and an adhesive layer 33. The pattern layer 31 and the light-transmissive pattern layer 32 are formed using a conventional gravure ink. The gravure ink contains a binder resin, a solvent, and a coloring agent. As the binder resin, for example, there are a vinyl chloride-vinyl acetate copolymer resin, an acrylic resin, a polyester resin, and a polyurethane resin. The solvent is used to dissolve the resin, and is selected depending on the resin. The solvent of the gravure ink has, for example, toluene, methyl ethyl ketone, ethyl acetate, and isopropyl alcohol.

[0068] In the light-transmissive pattern layer 32, a light-shielding portion 32b that shields visible light is formed by gravure printing, and a portion where the light-shielding portion 32b is not printed becomes a light-transmissive portion 32a.

[0069] The light-transmissive pattern layer 32 is aligned with the pattern layer 31 at the time of printing. By such alignment, visible light that has passed through the light-transmissive pattern layer 32 can pass through a prescribed portion of the pattern layer 31. As shown in FIG. 1, since the pattern 120 that transmits visible light is provided at a prescribed place of a decorative object such as a door 100, high dimensional accuracy is required. The adhesive layer 33 is a layer for adhesion to the first gasket film 40. The adhesive layer 33 is a layer that transmits visible light. The adhesive that constitutes the adhesive layer 33 uses, for example, a vinyl chloride-vinyl acetate copolymer resin, an acrylic resin, a polyester resin, and a polyurethane resin. FIG. 1B

[0070] (3-3) First gasket film 40 and second gasket film 50

[0071] The multilayer gasket film is constituted by heat-laminating the first gasket film 40 and the second gasket film 50.

[0072] The first gasket film 40 is constituted by a visible light-transmissive ABS resin. The visible light-transmissive ABS resin has, for example, a visible light-transmissive ABS resin and a visible light-transmissive MABS (methyl methacrylate-acrylonitrile-butadiene-styrene) resin. In the present application, in the case where the first gasket film 40 is constituted by a visible light-transmissive ABS resin, not only a case where the film is constituted only by an ABS resin, but also a case where an additive is added to the ABS resin is included.

[0073] The specific heat of the first gasket film 40 is 1.3 x 10 3 J / (kg·K) or more and 1.7 x 10 3 ​J / (kg-K) or less. The specific heat measurement method is in accordance with JIS K7123. Since the specific heat of the first backing film 40 is high, the temperature rise of the gravure printed layer 30 can be suppressed, and thus it is preferable. When the specific heat is too high, the material is not easily heated and softened, and it can be difficult to ensure adhesion between layers.

[0074] The thickness of the first backing film 40 is, for example, 100 μm to 250 μm. Since the thickness of the first backing film 40 is thick, thermal damage can be reduced, and thus it is preferable that the thickness be 150 μm to 250 μm, and further preferable that the thickness be 200 μm to 250 μm.

[0075] The second backing film 50 is disposed on the opposite side of the multilayer film 20 from the first backing film 40. The thickness of the second backing film 50 is, for example, 200 μm to 500 μm. The second backing film 50 is formed by disposing a second polycarbonate resin layer 52 between a third acrylic resin layer 51 and a fourth acrylic resin layer 53. The third acrylic resin layer 51 and the fourth acrylic resin layer 53 are composed of an acrylic resin. As the acrylic resin used for the third acrylic resin layer 51 and the fourth acrylic resin layer 53, for example, PMMA is used. In the present application, in the case where the third acrylic resin layer 51 and the fourth acrylic resin layer 53 are composed of an acrylic resin, not only the case where these layers are composed of only an acrylic resin is included, but also the case where an additive is added to the acrylic resin is included.

[0076] The second polycarbonate resin layer 52 is composed of a polycarbonate resin. As the polycarbonate resin used for the second polycarbonate resin layer 52, for example, a polycarbonate resin is used. In the present application, in the case where the second polycarbonate resin layer 52 is composed of a polycarbonate resin, not only the case where this layer is composed of only a polycarbonate resin is included, but also the case where an additive is added to the polycarbonate resin is included. The thickness of the second polycarbonate resin layer 52 must be smaller than the thickness of the second backing film 50, and is, for example, 70 μm to 350 μm. In order to balance heat resistance and moldability, the thickness of the second polycarbonate resin layer 52 is preferably 105 μm to 280 μm, and further preferably 140 μm to 210 μm. In addition, the glass transition temperature (Tg) of the first polycarbonate resin layer 22 is, for example, 120°C to 200°C. In order to obtain high heat resistance, it is preferable that the glass transition temperature (Tg) be high, and it is preferable that the glass transition temperature (Tg) be 150°C to 200°C, and further preferable that the glass transition temperature (Tg) be 170°C to 200°C.

[0077] (4) Method for manufacturing the insert-molded decorative film 10 of the first embodiment

[0078] An example of the method for manufacturing the insert-molded decorative film 10 is shown in FIGS. 9-12 FIG. 9 and FIG. 10 ​In the present embodiment, a cross section of a portion of the long sheet is shown. First, as shown in FIG. 9 In the first step, a gravure printing layer 30 is formed on the first main surface 20a side of the multilayer film 20 by gravure printing. First, a pattern layer 31 is printed on the multilayer film 20 by gravure printing. Next, with respect to the pattern layer 31, alignment is performed, and a masking portion 32b is printed by gravure printing, and a light-transmitting pattern layer 32 that transmits visible light is formed at a prescribed portion of the pattern layer 31. In other words, a light-transmitting portion 32a of the light-transmitting pattern layer 32 is formed at the prescribed portion of the pattern layer 31. Furthermore, an adhesive layer 33 is formed by printing an adhesive on the light-transmitting pattern layer 32 by gravure printing.

[0079] In the first step, heat treatment is performed at a temperature higher than the evaporation temperature of the solvent of the gravure ink used to form the gravure printing layer 30 after printing of the gravure printing layer 30. By this heat treatment, it is possible to reduce the residual solvent of the gravure ink compared to before the heat treatment.

[0080] In the second step, a first heat lamination step shown in FIG. 10 and a second heat lamination step shown in FIG. 11 are performed.

[0081] In the first heat lamination step, the first liner film 40 and the second liner film 50 are heat laminated while the first liner film 40 is in contact with the heating drum 420 as the second contact heating body and the second liner film 50 is in contact with the first liner film 40, and a multilayer liner film 60 is formed (see FIG. 11 ). The temperature of the heating drum 420 is, for example, 170°C. Heat from the heating drum 420 is transmitted to the second liner film 50 via the first liner film 40. In the first heat lamination step, since the first liner film 40 is in contact with the heating drum 420, the second liner film 50 is not firmly adhered to the heating drum 420 by heat lamination.

[0082] In the second heat lamination step, the PET film 80 as a release film, the multilayer liner film 60, and the multilayer film 20 are heat laminated by heat applied from the heating drum 410 as the first contact heating body. The temperature of the heating drum 410 is, for example, 170°C. Heat lamination is performed while the PET film 80 is in contact with the heating drum 410, the second liner film 50 of the multilayer liner film 60 is in contact with the PET film, and the multilayer film 20 on which the gravure printing layer 30 is formed is in contact with the first liner film 40 of the multilayer liner film 60. The thickness of the PET film 80 is, for example, 38 μm to 75 μm. PET is an abbreviation for polyethylene terephthalate.

[0083] The heating drum 410 and the heating drum 420 can use the same drum. In addition, here, the first contact heating body uses the heating drum 410, and the second contact heating body uses the heating drum 420, but the heating bodies usable by the first contact heating body and the second contact heating body are not limited to the heating drums. As long as the first contact heating body and the second contact heating body apply heat and pressure to the laminated film in a state of contact.

[0084] The release film uses the PET film 80, but a film other than the PET film 80 can also be used. As the release film, a film of the same system as the PET film 80 can be used. As the release film, for example, a polyethylene naphthalate (PEN) film can be used. As long as the release film has a release strength from the heating drum 410 at the time of heat lamination that is smaller than the release strength of the second backing film 50 from the heating drum 410 at the time of heat lamination in which the second backing film 50 is brought into direct contact with the heating drum 410.

[0085] As shown in FIG. 1, after heat lamination, the state becomes that the PET film 80 is laminated on the insert-molding decorative film 10. By peeling the PET film 80 from the laminated body in the state of FIG. 1, the insert-molding decorative film 10 can be obtained. FIG. 12 FIG. 12 As shown in FIG. 1, after heat lamination, the state becomes that the PET film 80 is laminated on the insert-molding decorative film 10. By peeling the PET film 80 from the laminated body in the state of FIG. 1, the insert-molding decorative film 10 can be obtained.

[0086] <Second Embodiment>

[0087] (5) Application of the Insert-Molding Decorative Film

[0088] Like the insert-molding decorative film of the first embodiment, the insert-molding decorative film of the second embodiment is also applied, for example, to the door 100 of an automobile.

[0089] (6) Method for Manufacturing a Resin Molded Article Using the Insert-Molding Decorative Film

[0090] Like the first embodiment, the resin molded article using the insert-molding decorative film of the second embodiment can also be manufactured, for example, by the method for manufacturing a resin molded article shown in FIG. 6. FIGS. 2-7

[0091] (7) Structure of the Insert-Molding Decorative Film 10

[0092] As shown in FIG. 1, after heat lamination, the state becomes that the PET film 80 is laminated on the insert-molding decorative film 10. By peeling the PET film 80 from the laminated body in the state of FIG. 1, the insert-molding decorative film 10 can be obtained. FIG. 15 ​​As shown, the insert molding decorative film 10 has a multilayer film 20, a gravure printing layer 30, a first backing film 40, a second backing film 50, and a screen printing layer 70. In the insert molding decorative film 10 of the second embodiment, the first pattern 36 of the pattern layer 31 formed on the gravure printing layer 30 is also disposed at a prescribed position of the door trim 110, which is a resin molded product having a three-dimensional shape. The light-transmissive pattern 77 of the light-transmissive pattern layer 71 is disposed in such a manner that visible light L is transmitted through the first pattern 36 or the periphery of the first pattern 36. In other words, the light-transmissive pattern 77 is disposed in such a manner that visible light is transmitted through a prescribed portion of the pattern of the pattern layer 31. The light-transmissive pattern 77 is a pattern of the light-transmissive portion 71a described later. The shift between the first pattern 36 and the light-transmissive pattern 77 is preferably 5 mm or less.

[0093] (7-1) Multilayer film 20

[0094] The multilayer film 20 of the second embodiment has the same structure as the multilayer film 20 of the first embodiment. Therefore, the description of the structure of the multilayer film 20 of the second embodiment is omitted here.

[0095] (7-2) Gravure printing layer 30

[0096] The gravure printing layer 30 of the second embodiment is also disposed on the first major surface 20a side of the multilayer film 20. Further specifically, the gravure printing layer 30 is formed by printing on the first major surface 20a (exposed surface of the first acrylic resin layer 21) of the multilayer film 20. The gravure printing layer 30 has a pattern layer 31 and an adhesive layer 33. In contrast to the gravure printing layer 30 of the first embodiment, the gravure printing layer 30 of the second embodiment does not have a light-transmissive pattern layer 32. In the gravure printing layer 30 of the second embodiment, the pattern layer 31 is contiguous with the adhesive layer 33. In other words, the pattern layer 31 is formed on the multilayer film 20, and then the adhesive layer 33 is printed on the pattern layer 31. Since the pattern layer 31 and the adhesive layer 33 of the second embodiment are the same as the pattern layer 31 and the adhesive layer 33 of the first embodiment, the description of the pattern layer 31 and the adhesive layer 33 of the second embodiment is omitted here.

[0097] (7-3) First backing film 40 and second backing film 50

[0098] The insert molding decorative film 10 of the second embodiment also has a multilayer backing film 60 (see FIG. 2) configured by heat-laminating the first backing film 40 and the second backing film 50. FIG. 17 The multilayer backing film 60 configured by the first backing film 40 and the second backing film 50 of the second embodiment is the same as the multilayer backing film 60 of the first embodiment, and therefore the description of the multilayer backing film 60 of the second embodiment is omitted.

[0099] (8) Manufacturing method of insert molding decorative film 10 of second embodiment

[0100] An example of a method for manufacturing the insert molding decorative film 10 of the second embodiment is shown in FIGS. 16-19 FIG. 2. In FIG. 16 and FIG. 1, a cross section of a portion of a long sheet is shown. First, as shown in FIG. 16 , in the first step, a gravure printing layer 30 is formed on the first main surface 20a side of the multilayer film 20 by gravure printing. First, a pattern layer 31 is printed on the multilayer film 20 by gravure printing. Next, an adhesive layer 33 is formed by printing an adhesive on the pattern layer 31 by gravure printing.

[0101] In the first step, after printing of the gravure printing layer 30, heat treatment is performed at a temperature higher than the evaporation temperature of the solvent of the gravure ink used to form the gravure printing layer 30. By this heat treatment, the residual solvent of the gravure ink can be reduced compared to before the heat treatment.

[0102] In the second step, the first heat lamination step shown in FIG. 10 and the second heat lamination step shown in FIG. 17 are also included in the method for manufacturing the insert molding decorative film 10 of the second embodiment.

[0103] In the first heat lamination step, the first liner film 40 is in contact with the heating drum 420 as the second contact heating body and the second liner film 50 is in contact with the first liner film 40. In this state, the first liner film 40 and the second liner film 50 are heat laminated to form the multilayer liner film 60 (see FIG. 17 ). The temperature of the heating drum 420 is, for example, 170°C.

[0104] As shown in FIG. 17 , as with the second lamination step of the first embodiment, in the second heat lamination step of the second embodiment, the PET film 80 as the release film, the multilayer liner film 60, and the multilayer film 20 are heat laminated by heat applied from the heating drum 410 as the first contact heating body. In the second heat lamination step of the second embodiment, since only the structure of the gravure printing layer 30 is different, it is performed in the same manner as the second lamination step of the first embodiment, so the explanation is omitted here.

[0105] As shown in FIG. 18 , after heat lamination, the state becomes one in which the PET film 80 is laminated on the component 11 of the insert molding decorative film. FIG. 18 The cross-sectional structure of the component 11 of the insert molding decorative film is shown, and the component 11 after heat lamination becomes the state of the roll 500 shown in FIG. 19 . In the next step, as shown in FIG. 19As shown, a single sheet 510 of the component 11 is produced from the roll 500 of the component 11. In the production of the single sheet 510, for example, a slot processing or a cutting processing is used. In other words, the long component 11 of the roll 500 is cut into the single sheet 510 of a short strip having a prescribed length. At the production of this single sheet 510, the PET film 80 becomes in a state of being laminated to the component 11.

[0106] In the next screen printing step, the screen printed layer 70 is formed on the second backing film 50 of the component 11 of the single sheet after the PET film 80 is peeled off. First, the PET film 80 is peeled off from the component 11 of the single sheet. Next, using an ink for screen printing of the related art, the light-transmissive pattern layer 71 is printed on the second backing film 50 by screen printing. In the light-transmissive pattern layer 71, the shielding portion 71b that shields visible light is formed by screen printing, and the portion where the shielding portion 71b is not printed becomes the light-transmissive portion 71a. At the time of printing the light-transmissive pattern layer 71, the alignment of the pattern of the light-transmissive pattern layer 71 and the pattern layer 31 is performed. Further, by screen printing, the adhesive layer 72 is printed on the light-transmissive pattern layer 71. The material for forming the adhesive layer 72 has, for example, a vinyl chloride-vinyl acetate copolymer resin, a polyester-based resin, an acrylic-based resin.

[0107] (9) Modified Example

[0108] (9-1) Modified Example A

[0109] In the above first and second embodiments, the case where the surface (the second principal surface 20b) of the multilayer film 20 is exposed is described. However, a surface layer can be formed on the second principal surface 20b of the multilayer film 20. For example, as shown in FIG. 13 and FIG. 14 and FIG. 20 and FIG. 21 As shown, a single sheet 510 of the component 11 is produced from the roll 500 of the component 11. In the production of the single sheet 510, for example, a slot processing or a cutting processing is used. In other words, the long component 11 of the roll 500 is cut into the single sheet 510 of a short strip having a prescribed length. At the production of this single sheet 510, the PET film 80 becomes in a state of being laminated to the component 11.

[0110] The maximum height roughness (Rz) of the surface of the matte layer 24 (measured in accordance with JIS B0601) is less than 20 μm, and the surface mainly exhibits the unevenness visually. In contrast, the maximum height roughness (Rz) of the surface of the matte layer 25 (measured in accordance with JIS B0601) is 20 μm or more, and the surface mainly exhibits the unevenness not only visually but also by touch.

[0111] Instead of the matte layers 24, 25, other pattern layers can also be formed by gravure printing on the second main surface 2b of the multilayer film 20. In this case, it is preferable that the gravure-printed layer formed on the second main surface 2b of the multilayer film 20 be formed at the same time as the gravure-printed layer 30 formed on the first main surface 2a. In addition, it is preferable that the second pattern of the pattern layer formed on the second main surface 2b of the multilayer film 20 be arranged in reference to the first pattern 36 of the pattern layer 31 of the gravure-printed layer 30 formed on the first main surface 2a.

[0112] (9-2) Modification B

[0113] In the above-described first and second embodiments, the case where the second step is configured in a manner including a first heat lamination step (see FIG. 10 ) and a second heat lamination step (see FIG. 11 or FIG. 17 ) in the production of the insert-molding decorative film 10 is described.

[0114] However, in the case where the take-off roll is set to 4 axes, in the second step, it can also be configured that, by one heat lamination, the PET film 80 is brought into contact with the heating drum 410, the second backing film 50 is brought into contact with the PET film 80, the first backing film 40 is brought into contact with the second backing film 50, and the multilayer film 20 on which the gravure-printed layer 30 is formed is brought into contact with the first backing film 40, and, by heat applied from the heating drum 410, the PET film 80, the second backing film 50, the first backing film 40, and the multilayer film 20 are heat-laminated. The part that differs from the production method of the insert-molding decorative film 10 of the above-described first embodiment is that, until the heat lamination at which the second backing film 50 is brought into contact with the PET film 80, the first backing film 40 and the second backing film 50 are in a separated state.

[0115] (9-3) Modification C

[0116] In the above-described second embodiment, the case where the screen-printed layer 70 is formed by screen printing after the cutting into the single sheets 510 is described. However, the screen printing for forming the screen-printed layer can also be performed in a roll-to-roll manner. In the case of the roll-to-roll manner, the light-transmissive pattern layer 71 is printed on the second backing film 50 after the PET film 80 is peeled off by screen printing. Furthermore, in the roll-to-roll manner, the adhesive layer 72 is printed on the light-transmissive pattern layer 71 by screen printing.

[0117] (10) Features

[0118] (10-1)

[0119] In the above-described decoration film 10 for insert molding, the multilayer film 20 is provided with the first polycarbonate resin layer 22 between the first acrylic resin layer 21 and the second acrylic resin layer 23, and the second backing film 50 is provided with the second polycarbonate resin layer 52 between the third acrylic resin layer 51 and the fourth acrylic resin layer 53. In the decoration film 10 for insert molding, by the multilayer structure of the multilayer film 20 and the second backing film 50, the shrinkage of the member at the time of drying when forming the gravure printed layer 30 is suppressed to, for example, ±0.15%, and in addition, the shrinkage of the member at the time of heat lamination is suppressed. As a result, the dimensional accuracy of the gravure printed pattern layer 31 and the light-transmissive pattern layer 32 or the dimensional accuracy of the gravure printed pattern layer 31 and the screen-printed light-transmissive pattern layer 71 is improved. In addition, by the multilayer structure of the second backing film 50, the heat resistance of the multilayer backing film 60 is improved, and in the production of the polycarbonate resin molded product 90, for example, even if the decoration film 10 for insert molding is brought into contact with the molten resin 290 reaching around 300°C, the flow of the gravure printing ink in the decoration film 10 for insert molding is suppressed. In addition, in the decoration film 10 for insert molding, by the ABS-based resin of the first backing film 40, the damage to the gravure printing ink by heat is reduced. Furthermore, by the second polycarbonate resin layer 52, the strength of the decoration film 10 for insert molding is improved, and cracks are less likely to occur in the decoration film 10 for insert molding at the time of molding and at the time of forming.

[0120] The flow of ink refers to a phenomenon in which the resin used for printing is melted due to high temperature.

[0121] (10-2)

[0122] The glass transition temperature of the polycarbonate-based resin of the first polycarbonate resin layer 22 and the second polycarbonate resin layer 52 of the above-described decoration film 10 for insert molding is 120°C or higher and 200°C or lower. Since the glass transition temperature of the polycarbonate-based resin of the first polycarbonate resin layer 22 and the second polycarbonate resin layer 52 is high, the heat resistance of the multilayer film 20 and the multilayer backing film 60 is improved. The gravure printed layer 30 sandwiched between the multilayer film 20 and the multilayer backing film 60 in which the heat resistance is improved as such is less likely to cause the flow of ink even if it is inserted in the production of the resin molded product 90 of the molten resin 290 of the polycarbonate-based resin reaching around 300°C.

[0123] (10-3)

[0124] The specific heat of the first backing film 40 of the above-described decoration film 10 for insert molding is 1.3 x 10 3 J / (kg·K) or higher and 1.7 x 10 3 J / (kg·K) or lower. By increasing the specific heat of the first backing film 40 as such, the damage to the gravure printed layer by heat is reduced.

[0125] (10-4)

[0126] In the decorative film 10 for insert molding described in the first embodiment above, when the light-transmitting pattern layer 32 is included in the gravure printing layer 30, shrinkage of the components during the formation of the gravure printing layer 30 and during heat lamination can be suppressed. As a result, the dimensional accuracy of the light-transmitting pattern layer 32 of the gravure printing layer 30 is improved.

[0127] (10-5)

[0128] In the decorative film for insert molding described in the second embodiment above, when the light-transmitting pattern layer 71 is formed on the second backing film 50, the light-transmitting pattern layer 71 is formed after heat lamination. As a result, the light-transmitting pattern layer 71 can be prevented from being affected by heat lamination.

[0129] (10-6)

[0130] In use FIGS. 9-12 or FIGS. 16-19 In the manufacturing method of the insert molding decorative film 10 according to the first or second embodiment described above, in the second step (refer to...) FIG. 11 or FIG. 17 Since the PET film 80, which serves as the release film, is in contact with the heating drum 410, which serves as the first contact heating element, and the second pad film 50 is in contact with the PET film 80, the second pad film 50 does not directly contact the heating drum 410. Therefore, when the insert molding decorative film 10 is peeled off from the heating drum 410 via heat lamination, the force exerted by the heating drum 410 on the insert molding decorative film 10 is reduced compared to the case where the second pad film 50 directly contacts the heating drum 410. As a result, it is possible to suppress pattern deformation in the gravure printing layer 30 caused by the force exerted by the heating drum 410 on the insert molding decorative film 10.

[0131] (10-7)

[0132] use FIGS. 9-12 or FIGS. 16-19 The manufacturing method of the decorative film 10 for insert molding according to the first or second embodiment described herein includes a first thermal lamination step (see reference). FIG. 10 ) and the second thermal lamination step (refer to FIG. 11 or FIG. 17 It is constructed in a manner that, by separating the lamination steps, can reduce the number of guide rollers used in the laminator. In this case, due to the first hot lamination step (refer to...), FIG. 10 The PET film 80 is not required in the process, so even if the heat lamination step is increased, the PET film 80 can be omitted.

[0133] (10-8)

[0134] In the above-described method for manufacturing the decorative film 10 for insert molding, the first step may include a heat treatment performed after printing the gravure printing layer 30 at a temperature higher than the evaporation temperature of the solvent used to form the gravure printing layer 30. Performing such a heat treatment reduces residual solvent in the gravure printing layer 30 and suppresses foaming during molding.

[0135] (10-9)

[0136] In use FIGS. 2-7 In the manufacturing method of the resin molded article 90 described herein, the heat resistance of the first padding film 40 and the second padding film 50 (multilayer padding film 60) is improved by the multilayer structure of the second padding film 50. As a result, ink flow in the gravure printing layer 30 can be suppressed when manufacturing a polycarbonate resin molded article 90 by injecting molten polycarbonate-based resin 290 at around 300°C. In addition, the ABS-based resin of the first padding film 40 can reduce heat-induced damage to the gravure ink in the gravure printing layer 30.

[0137] The first and second embodiments of the present invention have been described above. However, the present invention is not limited to the first and second embodiments described above, and various modifications can be made without departing from the spirit of the invention. In particular, the various embodiments and variations described in this specification can be arbitrarily combined as needed.

[0138] Explanation of reference numerals in the attached figures

[0139] 10: Decorative film for insert molding; 20: Multilayer film; 21: First acrylic resin layer; 22: First polycarbonate resin layer; 23: Second acrylic resin layer; 30: Gravure printing layer; 31: Pattern layer; 32: Translucent pattern layer; 33: Adhesive layer; 40: First backing film; 50: Second backing film; 51: Third acrylic resin layer; 52: Second polycarbonate resin layer; 53: Fourth acrylic resin layer; 60: Multilayer backing film; 70: Screen printing layer; 71: Translucent pattern; 72: Adhesive layer; 80: PET film (example of a release film); 410: Heating drum (example of a first contact heating element); 420: Heating drum (example of a second contact heating element).

Claims

1. A decoration film for insert molding, which is a film that is three-dimensionally shaped before insert molding, The decoration film for insert molding has: a multilayer film that has a first main surface and a second main surface, a first polycarbonate resin layer composed of a polycarbonate resin is disposed between a first acrylic resin layer and a second acrylic resin layer composed of an acrylic resin, and is transparent to visible light; a gravure printing layer that is disposed on the first main surface side of the multilayer film, has a pattern layer that forms a pattern of gravure printing, and is transparent to visible light; a first backing film that is disposed on the opposite side of the multilayer film from the gravure printing layer, is composed of an ABS resin that is transparent to visible light, and is transparent to visible light; a second backing film that is disposed on the opposite side of the multilayer film from the first backing film, is composed of a second polycarbonate resin layer composed of a polycarbonate resin that is disposed between a third acrylic resin layer and a fourth acrylic resin layer composed of an acrylic resin, and is transparent to visible light; and a light-transmitting pattern layer that has a light-transmitting pattern that is transparent to visible light and is included in the gravure printing layer or formed on the second backing film, the light-transmitting pattern of the light-transmitting pattern layer is disposed so as to pass through a prescribed portion of the pattern of the pattern layer with visible light, The specific heat of the first gasket film is 1.3 x 10 3 J / (kg·K) or more and 1.7 x 10 3 J / (kg·K) or less.

2. The decoration film for insert molding according to claim 1, wherein the polycarbonate resin that constitutes the first polycarbonate resin layer and the second polycarbonate resin layer has a glass transition temperature of 120°C or higher and 200°C or lower.

3. A method for manufacturing a decoration film for insert molding, which is a film that is three-dimensionally shaped before insert molding, The method for manufacturing a decoration film for insert molding has: a first step of forming a gravure printing layer that is transparent to visible light by gravure printing on the first main surface side of a multilayer film that has a first polycarbonate resin layer composed of a polycarbonate resin disposed between a first acrylic resin layer and a second acrylic resin layer composed of an acrylic resin and is transparent to visible light; a second step of thermally laminating a first backing film composed of an ABS resin that is transparent to visible light and a second backing film composed of a second polycarbonate resin layer composed of a polycarbonate resin disposed between a third acrylic resin layer and a fourth acrylic resin layer composed of an acrylic resin and transparent to visible light to the multilayer film on which the gravure printing layer is formed; and a shaping step of three-dimensionally shaping the decoration film for insert molding, in the second step, the release film, the second backing film, the first backing film, and the multilayer film on which the gravure printing layer is formed are thermally laminated by heat applied from the first contact heating body in a state in which the release film is in contact with a first contact heating body, the second backing film is in contact with the release film, the first backing film is in contact with the second backing film, and the multilayer film on which the gravure printing layer is formed is in contact with the first backing film, a light-transmitting pattern layer is included in the gravure printing layer or formed on the second backing film, The specific heat of the first gasket film is 1.3 x 10 3 J / (kg·K) or more and 1.7 x 10 3 J / (kg·K) or less, The peeling strength at which the release film peels from the first contact heating body when heat-laminated is lower than the peeling strength at which the second backing film peels from the first contact heating body when the second backing film is directly heat-laminated with the first contact heating body.

4. The method for producing a insert-molding decoration film according to claim 3, wherein The second step includes: a first heat-lamination step of heat-laminating the first backing film and the second backing film to form a multi-layer backing film in a state where the first backing film is in contact with a second contact heating body and the second backing film is in contact with the first backing film; and a second heat-lamination step of heat-laminating the release film, the multi-layer backing film, and the multi-layer film by heat applied from the first contact heating body in a state where the release film is in contact with the first contact heating body, the second backing film of the multi-layer backing film is in contact with the release film, and the multi-layer film in which the gravure printed layer is formed is in contact with the first backing film of the multi-layer backing film.

5. The method for producing a insert-molding decoration film according to claim 4, wherein In the first step, heat treatment is performed at a temperature higher than an evaporation temperature of a solvent of a gravure ink used for forming the gravure printed layer after printing of the gravure printed layer.

6. A method for producing a resin molded product, comprising: a molding step of three-dimensionally molding the insert-molding decoration film according to claim 1 or 2; a trimming step of trimming and removing an unnecessary portion of the insert-molding decoration film to which a three-dimensional shape is imparted by the molding step; and an injection molding step of molding a resin molded product made of polycarbonate and transparent to visible light by placing the insert-molding decoration film in a mold and injecting a polycarbonate resin into the mold.

Images