JP5322566B2 - Coating film adhesive film, in-mold coated product manufacturing method and in-mold coated product - Google Patents

Description

  In the present invention, after injecting a thermosetting paint between the surface of a molded product molded in a mold and the mold cavity surface, the thermosetting paint is cured in the mold and the surface of the molded product is heated. The present invention relates to a coating film adhesive film that can be used for the production of an in-mold coated product in which a curable coating is closely integrated.

  As a conventional method for producing an in-mold coated product, an in-mold coating mold including a back surface forming mold 121, a surface forming mold 122, and a coating film forming mold 123 is used (see FIG. 7A), and the back surface forming is performed. After the resin molded product 102 is formed by the mold 121 and the surface forming mold 122 (see FIG. 7B), the mold facing the back surface forming mold 121 after the mold opening is switched to the coating film forming mold 123 (see FIG. 7). 7 (c), (d)), the mold is closed to form a cavity between the coating film forming mold 123 and the resin molded article 102, and then a thermosetting paint is injected into the cavity (FIG. 7 (e)). Patent Document 1 discloses a technique in which a mold is opened to obtain an in-mold coated product 101 in which a thermosetting paint layer 103 is formed on the surface of a resin molded product 102 (see FIG. 7F).

Japanese Patent No. 3998660

  In this in-mold coated product manufacturing method, when the mold facing the back surface forming mold 121 is switched to the coating film forming mold 123, the mold is once completely opened, so that the surface of the resin molded article 102 is formed. It will be cooled to near the outside temperature. Then, if the heat of the coating film forming mold 123 is not sufficiently transmitted to the interface between the thermosetting paint and the resin molded article 102, chemical bonding between the thermosetting paint and the resin molded article 102 cannot be performed, and the resin The penetration of the thermosetting paint into the molded product 102 is weakened, and as a result, the adhesion between the resin molded product 102 and the thermosetting paint layer 103 may be weakened.

  The present invention provides sufficient adhesion between the resin molded product and the thermosetting coating layer even if the surface of the resin molded product is cooled to near the outside air temperature once the mold is completely opened. An object of the present invention is to provide a method for producing an in-mold coated product and a coating film adhesive film used in this method.

  In order to achieve the above object, the present invention has the following features.

The coated film adhesive film of the present invention is a coated film adhesive film for forming an in-mold coated product in which a coated film adhesive layer is formed between a resin molded product and a thermosetting paint layer,
In this configuration, a release layer and a coating film adhesive layer are sequentially laminated on one side of the base film.

  In the above invention, an acrylic acid monomer may be mixed in the coating film adhesive layer.

  Moreover, in said invention, the reaction catalyst may be mixed in the coating-film adhesion layer.

  In the above invention, a design layer may be further laminated on the coating film adhesive layer.

The method for producing an in-mold coated product of the present invention uses an in-mold coating mold including a back surface forming mold, a surface forming mold, and a coating film forming mold.
(1) After the coating film adhesive film according to any one of the above inventions is placed in the surface forming mold so that the base film side faces the cavity surface, the back surface forming mold and the surface forming mold are closed. , Forming a molding cavity for forming a resin molded product between the back surface forming mold and the surface forming mold,
(2) Fill a molding cavity with a molding resin, solidify by cooling, and form a resin molded product integrated with the coating film adhesive film,
(3) Open the back surface forming mold and the surface forming mold in a state where the back surface forming mold holds the resin molded product,
(4) The surface forming mold facing the back surface forming mold is switched to the coating film forming mold, and the base film is peeled off from the resin molded product integrated with the coating film adhesive film before or after switching. The coating adhesive layer is exposed on the outermost surface,
(5) Coating for closing the back surface forming mold and the coating film forming mold holding the resin molded product, and coating the resin molded product with the coating film adhesive layer exposed on the outermost surface with a thermosetting paint A cavity is formed between the resin molded product and the coating film forming mold,
(6) A step of integrally coating the thermosetting paint layer on the resin molded product having the coating film adhesive layer exposed on the outermost surface by injecting and solidifying the thermosetting paint into the coating cavity.

Also, in the above invention, the injection molding machine is a rotary injection molding machine with a rotating disk, and by the operation of the rotating disk,
After forming the resin molded product integrated with the coating film adhesive film between the back surface forming mold and the surface forming mold, apply the mold facing the back surface forming mold holding the resin molded product from the surface forming mold. You may switch to a film forming mold.

In the above invention, the in-mold coating mold further includes a rotation mechanism, and by the operation of the rotation mechanism,
After forming the resin molded product integrated with the coating film adhesive film between the back surface forming mold and the surface forming mold, apply the mold facing the back surface forming mold holding the resin molded product from the surface forming mold. You may switch to a film forming mold.

  In the above invention, the thermosetting paint injected almost simultaneously with the completion of injection of the thermosetting paint into the coating cavity may be pressurized.

  The in-mold coated product of the present invention has a configuration in which a coating film adhesive layer and a thermosetting paint layer are sequentially laminated on a resin molded product.

  In the above invention, an acrylic acid monomer may be mixed in the coating film adhesive layer.

  Moreover, in said invention, the reaction catalyst may be mixed in the coating-film adhesion layer.

  In the above invention, a design layer may be further laminated between the resin molded product and the coating film adhesive layer.

  The coated film adhesive film of the present invention is a coated film adhesive film for forming an in-mold coated product in which a coated film adhesive layer is formed between a resin molded product and a thermosetting coating layer, and is provided on one side of a base film. The release layer and the coating film adhesive layer are sequentially laminated. Therefore, since a coating film adhesive layer can be provided between the resin molded product and the thermosetting paint layer, the resin molded product and the thermosetting can be cured even if the space between the thermosetting paint and the resin molded product is not sufficiently heated. In-mold coated products having high adhesion to the conductive paint layer can be obtained.

  Moreover, this invention can mix an acrylic acid monomer in a coating-film adhesive layer. Therefore, since the coating layer adhesive layer can be equipped with OH groups having high radical polymerization reaction activity with the thermosetting paint layer, resin molding is possible even if the space between the thermosetting paint and the resin molded product is not sufficiently heated. An in-mold coated product having high adhesion between the product and the thermosetting paint layer can be obtained.

  In the present invention, a reaction catalyst can be mixed in the coating film adhesive layer. Therefore, since the reaction between the coating adhesive layer and the thermosetting paint layer can be promoted, the resin molded article and the thermosetting paint layer can be obtained even if the space between the thermosetting paint and the resin molded article is not sufficiently heated. In-mold coated products can be obtained with high adhesive strength.

  Moreover, this invention can laminate | stack a design layer further on a coating-film adhesive layer. Therefore, by making the thermosetting paint layer and the coating adhesive layer transparent, it is possible to form an in-mold coated product with a design layer visible on the back side of the thermosetting paint layer. In-mold coated products with a variety of designs can be obtained.

  Embodiments of the present invention will be described in detail with reference to the drawings.

  First, the coating film adhesive film of this invention is demonstrated.

  The coated film adhesive film 1 of the present invention is for forming an in-mold coated product 11 (see FIG. 3) in which a coated film adhesive layer 5 is formed between a resin molded product 12 and a thermosetting paint layer 13. In this case, at least the release layer 4 and the coating film adhesive layer 5 are sequentially laminated on one side of the base film 2 (see FIG. 1). The coating film adhesive film 1 is laminated with an easy adhesion layer 3 between the base film 2 and the release layer 4 as necessary, and a design layer 6 and a resin bonding layer 7 are sequentially laminated after the coating film adhesion layer 5 is formed. It is formed. As will be described later, the coating film adhesive film 1 peels the base film 2 (release film 8) from the resin molded product 12 integrated with the coating film adhesive film 1, thereby coating film adhesive layer 5 on the resin molded product 12 ( When the transfer layer 9) is exposed on the outermost surface (see FIG. 2C and FIG. 1), the base film 2, the easy-adhesion layer 3 and the release layer 4 are peeled and removed from the resin molded product 12 as a release film 8, The coating film adhesive layer 5, the design layer 6, and the resin adhesive layer 7 are transferred onto the resin molded product 12 as the transfer layer 9.

  Base film 2 includes polyester resin, polypropylene resin, vinyl chloride resin, polyethylene resin, polyethylene terephthalate resin, polycarbonate resin, nylon resin, vinylon resin, acetate resin, polyethylene resin, polyamide resin, polyacrylic resin, Plastic sheets such as polyvinyl chloride resins can be used. The thickness of the base film 2 may be 10 to 100 μm.

  A release layer 4 is formed on the base film 2. The release layer 4 is a layer that is peeled and removed from the coating film adhesive layer 5 together with the base film 2 in the transfer step of the coating film adhesive layer 5 onto the resin molded product 12 described later. As a material for the release layer 4, a curable resin such as a silicone resin, a melamine resin, an alkyd resin, or an epoxy resin may be used. Examples of the method for forming the release layer 4 include a coating method such as a roll coating method and a spray coating method, a printing method such as a gravure printing method and a screen printing method.

  Further, an easy-adhesion layer 3 for preventing the release layer 4 from being peeled off from the base film 2 is provided between the base film 2 and the release layer 4 as necessary. As a material of the easy-adhesion layer 3, a polyester resin, a urethane resin, or the like may be used. Examples of the method for forming the easy adhesion layer 3 include a coating method such as a roll coating method and a spray coating method, a printing method such as a gravure printing method and a screen printing method.

  A coating film adhesive layer 5 is formed on the release layer 4. The coating film adhesive layer 5 is a layer for adhering a thermosetting paint layer 13 described later to the resin molded product 12. Since the coating film adhesive layer 5 can be provided between the resin molded product 12 and the thermosetting paint layer 13 by this coating film adhesive layer 5, the space between the thermosetting paint and the resin molded product 12 is sufficiently heated. Even if not, the in-mold coated product 11 having high adhesion between the resin molded product 12 and the thermosetting paint layer 13 can be obtained. As a material for the coating film adhesive layer 5, an acrylic resin, a vinyl chloride resin, a urethane resin, an ester resin, or the like may be used. As a method for forming the coating film adhesive layer 5, a gravure coating method, a roll coating method, a comma coating method or the like, a gravure printing, a screen printing method or the like may be used. As for the dry film thickness of the coating-film adhesive layer 5, it is common to set it as 1-5 micrometers. When the design layer 6 and the resin adhesive layer 7 are not formed on the coating film adhesive layer 5, the coating film adhesive layer 5 is directly laminated on the resin molded product 12.

  It is preferable to mix an acrylic acid monomer into the coating film adhesive layer 5. In this way, since the coating film adhesive layer 5 is provided with OH groups having a high radical polymerization reaction activity with the thermosetting paint layer 13, even if the space between the thermosetting paint and the resin molded product is not sufficiently heated. An in-mold coated product 11 having high adhesion between the resin molded product 12 and the thermosetting paint layer 13 can be obtained.

  Moreover, it is preferable to mix a reaction catalyst into the coating film adhesive layer 5. In this way, the reaction between the coating film adhesive layer 5 and the thermosetting paint layer 13 is promoted, so that the resin molded article 12 and the heat can be heated even if the space between the thermosetting paint and the resin molded article 12 is not sufficiently heated. The in-mold coated product 11 having a high adhesion with the curable coating layer 13 can be obtained. As the reaction catalyst, a metal methacrylate or the like may be used.

  A design layer 6 may be formed on the coating adhesive layer 5. As a material of the design layer 6, a resin such as a vinyl resin, an amide resin, an ester resin, an acrylic resin, a urethane resin, a vinyl acetal resin, an ester urethane resin, a cellulose ester resin, or an alkyd resin is used as a binder. And a color ink containing an appropriate color pigment or dye as a colorant may be used. As a method for forming the design layer 6, a normal printing method such as a gravure printing method, a screen printing method, or an offset printing method may be used. The thickness of the design layer 6 is preferably 1 to 30 μm. The design layer 6 is not limited to colored ink, but may form a metal vapor deposition layer or the like to express a design with metallic luster. Aluminum, chromium, copper, tin, or the like is used as the material for the metal deposition layer. The metal vapor deposition layer may be formed by using a vacuum vapor deposition method, a sputtering method, an ion plating method, or the like. When the design layer 6 is formed, the thermosetting paint layer 13 and the coating film adhesive layer 5 are made transparent so that the design layer 6 can be visually recognized from the surface of the finally formed in-mold coated product 11. By doing so, the design layer 6 can be visually recognized on the back surface of the thermosetting paint layer 13, so that an in-mold coated product 11 having a high-definition and versatile design including depth and metal tone can be obtained. it can.

  When the design layer 6 is formed, it is preferable to further form the resin adhesive layer 7 on the design layer 6. The resin adhesive layer 7 is a layer for adhering the transfer layer 9 to the resin molded product 12. When the material of the resin molded product 12 is a polyacrylic resin, a polyacrylic resin may be used as the material of the resin adhesive layer 7. In addition, when the material of the resin molded product 12 is polyphenylene oxide / polystyrene resin, polycarbonate resin, styrene copolymer resin, or polystyrene blend resin, acrylic resin or vinyl chloride resin having an affinity for these resins A chlorinated polypropylene resin, an ethylene vinyl acetate copolymer resin, an ester resin, a polyurethane resin, or the like may be used. As a method for forming the resin adhesive layer 7, a gravure coating method, a roll coating method, a comma coating method, or the like, a gravure printing, a screen printing method, or the like may be used. The dry film thickness of the resin adhesive layer 7 is generally 1 to 5 μm.

  Next, the manufacturing method of the in-mold coated product 11 of this invention using the coating-film adhesive film 1 which is said structure is demonstrated.

  For the production of the in-mold coated product 11 of the present invention, an in-mold coating mold including a back surface forming mold 21, a surface forming mold 22, and a coating film forming mold 23 is used. The back surface forming mold 21 is used to form the back surface shape of the resin molded product 12. The surface forming mold 22 is used for forming the surface shape of the resin molded product 12. The coating film forming mold 23 is used for forming the thermosetting paint layer 13 on the surface of the resin molded product 12.

  First, after the coating film adhesive film 1 is disposed in the surface forming mold 22 so that the base film 2 side (release film 8 side) faces the cavity surface, the back surface forming mold 21 and the surface forming mold 22 are formed into molds. It closes and the shaping | molding cavity for forming the resin molding 12 is formed between the back surface formation die 21 and the surface formation die 22 (refer Fig.2 (a)).

  Here, when the coating film adhesive film 1 is disposed in the surface forming mold 22, the single-layer coating film adhesive film 1 may be fed one by one, or a necessary portion of the long coating film adhesive film 1 is intermittent. May be sent in. When using the long coating-film adhesive film 1, it is good to use the feeding apparatus which has a positioning mechanism so that the registration of the coating-film adhesive film 1 and the surface formation metal mold | die 22 may correspond. Further, when the coating film adhesive film 1 is intermittently fed, the position of the coating film adhesive film 1 is detected by a sensor, and then the coating film adhesive film 1 is fixed by the back surface forming mold 21 and the surface forming mold 22. It may be. Moreover, it is preferable to arrange | position the coating-film adhesive film 1 also in the part slightly exceeded the boundary of a shaping | molding cavity so that the outer periphery of a shaping | molding cavity may be covered reliably (not shown). If it does in this way, the adhesive force of the resin molded product 12 and the thermosetting coating layer 13 will be obtained also in the outer periphery edge part of the resin molded product 12, and when the coating-film adhesive film 1 is provided with the design layer 6, an outer periphery edge part. Thus, the in-mold coated product 11 having no design leakage can be reliably obtained.

  Next, a molding resin is filled in the molding cavity and solidified by cooling to form a resin molded product 12 integrated with the coating film adhesive film 1 (see FIG. 2B).

  The molding resin used for the resin molded article 12 is not particularly limited, such as a normal thermoplastic injection molding resin and engineering plastic, and a thermosetting molding resin material, but it is easy to mold and adheres to a thermosetting paint. Good is preferred. Specific examples include acrylonitrile butadiene styrene resin (ABS resin), polyamide resin, polyethylene resin, polyester resin, polypropylene resin, polybutylene terephthalate resin, and polycarbonate resin. Here, when the thermosetting paint is cured at a relatively high temperature such as about 90 to 100 ° C. when the thermosetting paint layer 13 described later is formed, a so-called engineer plastic such as a polycarbonate resin is used. preferable.

  Next, the back surface forming die 21 and the surface forming die 22 are opened while the back surface forming die 21 holds the resin molded product 12, and the surface forming die 22 facing the back surface forming die 21 is coated. Switching to the forming mold 23, the base film 2 (release film 8) is peeled from the resin molded product 12 integrated with the coating film adhesive film 1 before or after switching, and the coating film adhesive layer 5 on the resin molded product 12 is removed. It is exposed on the outermost surface (see FIGS. 2C and 2D).

  Subsequently, the back surface forming mold 21 holding the resin molded product 12 and the coating film forming mold 23 are closed, and the resin molded product 12 with the coating film adhesive layer 5 exposed on the outermost surface is coated with a thermosetting paint. A coating cavity is formed between the resin molded product 12 and the coating film forming mold 23, and a thermosetting paint is injected into the coating cavity and solidified, so that the coating film adhesive layer 5 is on the outermost surface. The exposed resin molded product 12 is integrally covered with the thermosetting paint layer 13 (see FIG. 2E). The mold temperature of the coating film forming mold 23 and the back surface forming mold 21 is set to a temperature at which the thermosetting paint is cured within a few seconds depending on the material of the thermosetting paint.

  The thermosetting paint is sent from the paint tank 25 to the paint injector 24, and an accurate amount for one shot is injected from the paint injector 24 into the paint cavity with an appropriate pressure. Thermosetting paint materials include one-component paints mainly composed of binder components that can be cured by peroxide catalysts such as unsaturated polyester resins, epoxy acrylate oligomers, urethane acrylate oligomers, and epoxy resin / polyamine curing systems. And a two-component paint such as a polyol resin / polyisocyanate curing system in which a main agent / curing agent is mixed immediately before mold injection. Among them, an oligomer containing an acrylate group or an unsaturated polyester resin, or an ethylenically unsaturated monomer copolymerizable with these components and an organic peroxide initiator having a crosslinking efficiency of 8 or more are contained. Liquid paints are excellent in curability, adhesion, appearance, and weather resistance, can shorten the curing time, and can be applied to resin molding materials for which in-mold coating methods cannot be applied due to problems with adhesion, appearance, and weather resistance. It is very good in that it can be applied. These coating solutions do not contain or are very low in volatile organic solvents such as those used in conventional spraying and dipping.

  Finally, the in-mold coating in which the coating film adhesive layer 5 and the thermosetting coating layer 13 are sequentially laminated on the resin molded product 12 by opening the back surface forming mold 21 and the coating film forming mold 23. Product 11 can be obtained (see FIG. 2 (f) and FIG. 3).

  Hereinafter, several methods for switching the front surface forming mold 22 facing the back surface forming mold 21 to the coating film forming mold 23 will be exemplified.

  Resin integrated with the coating film adhesive film 1 between the back surface forming mold 21 and the front surface forming mold 22 by operating the rotating disk 31 as a rotary injection molding machine with a rotating disk 31 as the injection molding machine. After forming the molded product 12, there is a method of switching the mold facing the back surface forming mold 21 holding the resin molded product 12 from the surface forming mold 22 to the coating film forming mold 23 (see FIG. 4). The back surface forming mold 21 may be fixed to the turntable 31 (see FIG. 4), and the front surface forming mold 22 and the coating film forming mold 23 may be fixed instead of the back surface forming mold 21. (Not shown). Here, if two or more back surface forming molds 21 are used, the back surface forming mold 21 for forming the resin molded product 12 is formed by closing the back surface forming mold 21 and the front surface forming mold 22. Forming between the mold 21 and the surface forming mold 22, filling a molding cavity with a molding resin and solidifying by cooling to form the resin molded article 12, and other back surface molding for holding the resin molded article 12 The mold 21 and the coating film forming mold 23 are closed, and a coating cavity for coating the resin molded product 12 with the coating film adhesive layer 5 exposed on the outermost surface with a thermosetting paint is formed with the resin molded product 12. It is possible to perform the process of forming between the coating film forming mold 23 and injecting a thermosetting paint into the coating cavity and solidifying it simultaneously. A thermosetting paint layer 13 is formed on the surface of the resin molded product 12 It is suitable for you.

  The in-mold coating mold further includes a rotation mechanism 32, and the resin molded product 12 integrated with the coating film adhesive film 1 between the back surface forming mold 21 and the front surface forming mold 22 by the operation of the rotating mechanism 32. There is also a method of switching the mold that faces the back surface forming mold 21 that holds the resin molded product 12 from the surface forming mold 22 to the coating film forming mold 23 (see FIG. 5). Here, the back surface forming die 21 is disposed between the surface forming die 22 and the coating film forming die 23, and the back surface forming die 21 has a shape in which each of the front surface and the back surface can form a cavity, The forming mold 21 may be switched by rotating so as to replace the front and back surfaces (see FIG. 5). In order to rotate the back surface forming mold 21, for example, a rotating mechanism 32 that rotates on a horizontal plane may be used. This method is also preferable because the thermosetting coating layer 13 can be formed on the surface of another resin molded product 12 while one resin molded product 12 is being molded.

  In the production of the in-mold coated product, a step of pressurizing the thermosetting paint injected almost simultaneously with the completion of the injection of the thermosetting paint into the coating cavity may be added. If this process is added, even if the thermosetting coating contracts greatly due to curing, it is possible to prevent the occurrence of sink marks on the surface of the in-mold coated product 11. In adding this process, for example, as the back surface forming mold 21, the compression block 41, the outer peripheral plate 42 positioned around the compression block 41, the mounting plate 43 to which the compression block 41 is fixed, the outer peripheral plate 42 and the mounting plate 43 For example, a member provided with an elastic body such as a coil spring 44 can be used (see FIG. 6). In addition, by using a product provided with a compression mechanism in the product portion of the cavity of the coating film forming mold 23, sink marks do not appear on the surface of the thermosetting paint layer 13 and at the same time, the coating film forming mold 23. The fine shape formed on the cavity surface can be reliably transferred to the thermosetting paint layer 13 (not shown).

  First, a coating film adhesive layer 5, a design layer 6, and a resin as a transfer layer 9 are formed on a release film 8 in which a release layer 4 is formed on one side of a base film 2 made of a polyethylene terephthalate film having a thickness of 38 μm by a gravure printing method. The coating layer adhesive film 1 was formed by sequentially laminating the adhesive layer 7 by a gravure printing method. The release layer 4 is an ink made of an epoxy resin, the coating film adhesive layer 5 is an ink made of a vinyl chloride resin, the design layer 6 is an ink made of an acrylic resin, and the resin adhesive layer 7 is made of an ethylene vinyl acetate copolymer resin. Ink was used.

  Then, using an in-mold coating mold including a back surface forming mold 21, a surface forming mold 22, and a coating film forming mold 23, the mold temperature is set to 70 ° C. so that the base film 2 side faces the cavity surface. After the coating film adhesive film 1 is placed in the surface forming mold 22, the back surface forming mold 21 and the surface forming mold 22 are closed to form a molding cavity for forming the resin molded product 12. It formed between the metal mold | die 21 and the surface formation metal mold | die 22 (refer Fig.2 (a)).

  Here, a rotary injection molding machine is used as the injection molding machine, two back surface forming molds 21 are arranged on the rotating disk 31, and a surface forming mold 22 is mounted on a stationary disk (not shown) of the injection molding machine. And a coating film forming mold 23 (see FIG. 4).

  Next, a polycarbonate resin heated and melted was filled in the molding cavity and cooled and solidified for 40 seconds to form a resin molded product 12 integrated with the coating film adhesive film 1 (see FIG. 2B).

  Then, the back surface forming mold 21 and the surface forming mold 22 are opened while the back surface forming mold 21 holds the resin molded product 12 and the base film is formed from the resin molded product 12 integrated with the coating film adhesive film 1. 2 (peeling film 8) is peeled off, and a rectangular parallelepiped resin molded product 12 having a length of 100 mm, a width of 50 mm, and a height of 3 mm, where the coating film adhesive layer 5 is exposed on the outermost surface, is held by the back surface forming mold 21. (See FIG. 2 (c)).

  Subsequently, the back surface forming mold 21 holding the resin molded product 12 is rotated 180 degrees by the turntable 31 so that the surface of the back surface forming mold 21 that holds the resin molded product 12 has a cavity having a length of 100. It switched so that it might oppose with the coating-film formation metal mold | die 23 by which the mold temperature was set to 95 degreeC by 0.5 mm, width 50.5 mm, and height 3.2 mm (refer FIG.2 (d)).

  Then, the back surface forming mold 21 and the coating film forming mold 23 holding the resin molded product 12 are closed, and the resin molded product 12 with the coating film adhesive layer 5 exposed on the outermost surface is coated with a thermosetting paint. A coating cavity is formed between the resin molded product and the coating film forming mold, and a thermosetting paint (Dainippon Paint Co., Ltd., Pluglas 8000) with transparency is injected into the coating cavity. The thermosetting paint was solidified by holding for 40 seconds to solidify the thermosetting paint on the resin molded product having the coating film adhesive layer exposed on the outermost surface (see FIG. 2 (e)).

  Finally, by opening the back surface forming mold 21 and the coating film forming mold 23, the resin adhesive layer 7, the design layer 6, the coating film adhesive layer 5, and the thermosetting paint layer 13 are formed on the resin molded product 12. In this way, an in-mold coated product 11 was obtained in which layers were sequentially formed (see FIGS. 2 (f) and 4). Since the coating film adhesive layer 5 is provided between the resin molded product 12 and the thermosetting paint layer 13, the in-mold coated product 11 has an adhesive force between the resin molded product 12 and the thermosetting paint layer 13. Was expensive. In addition, the in-mold coated product 11 has a design layer 6 visible on the back side of the transparent thermosetting paint layer 13 and the coating adhesive layer 5, and a high-definition and versatile design including depth and metallic tone. It was something with.

It is sectional drawing which shows the coating-film adhesive film of this invention. It is sectional drawing which shows the manufacturing method of the in-mold coating goods of this invention. It is sectional drawing which shows the in-mold coating goods of this invention. It is sectional drawing which shows the manufacturing method of the in-mold coating goods of this invention using a rotary injection molding machine. It is sectional drawing which shows the manufacturing method of the in-mold coating goods of this invention using the in-mold coating metal mold | die provided with a rotation mechanism. It is sectional drawing which shows the manufacturing method of the in-mold coating goods of this invention provided with the process of pressurizing a thermosetting coating. It is sectional drawing which shows the manufacturing method of the conventional in-mold coating goods.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating film adhesive film 2 Base film 3 Easy adhesion layer 4 Release layer 5 Coating film adhesion layer 6 Design layer 7 Resin bonding layer 8 Release film 9 Transfer layer 11 In-mold coating product 12 Resin molding product 13 Thermosetting coating layer 21 Back surface forming mold 22 Surface forming mold 23 Coating film forming mold 24 Paint injection machine 25 Paint tank 31 Rotary table of rotary injection molding machine 32 Rotating mechanism 41 Compression block 42 Outer peripheral plate 43 Mounting plate 44 Coil spring 101 In-mold coating product DESCRIPTION OF SYMBOLS 102 Resin molded product 103 Thermosetting paint layer 121 Back surface forming mold 122 Surface forming mold 123 Coating film forming mold 124 Paint injection machine 125 Paint tank

Claims (7)

A method for producing an in-mold coated product using a coating film adhesive film in which a release layer and a coating film adhesive layer are sequentially formed on a base film,
Arranging the coating film adhesive film in a surface forming mold for forming a surface shape of the resin molded product such that the base film side faces the cavity surface;
The back surface forming mold for forming the back surface shape of the resin molded product and the surface forming mold are closed to form a molding cavity for forming the resin molded product as the back surface forming mold and the surface forming mold. A step of forming between
Filling the molding cavity with a molding resin and solidifying by cooling to form the resin molded product;
Opening the back surface forming mold and the surface forming mold in a state where the back surface forming mold holds the resin molded product;
The base film is peeled off from the resin molded product integrated with the coating film adhesive film at the same time or after the mold opening of the back surface forming mold and the surface forming mold, and the coating film adhesive layer is removed from the resin molded product. Exposing to the surface;
The surface forming mold is switched to a film forming mold for forming a coating film on the surface of the resin molded product, the back surface forming mold and the coating film forming mold are closed, and the resin molding is performed. Forming a coating cavity for coating the surface of the product with a thermosetting paint between the resin molded product and the coating film forming mold,
A method for producing an in-mold coated product, comprising: injecting the thermosetting paint into the coating cavity and solidifying the surface of the resin molded product so as to integrally cover a thermosetting paint layer. The back surface forming mold is fixed to a rotating disk of an injection molding machine, or the surface forming mold and the coating film forming mold are fixed to a rotating disk of an injection molding machine, and the rotating disk is rotated to rotate the rotating disk. The method for producing an in-mold coated product according to claim 1, wherein a surface forming mold is switched to the coating film forming mold. The surface forming mold and the coating film forming mold are arranged to oppose each other,
The back surface forming mold is configured such that each of the front surface and the back surface forms the back surface shape of the resin molded product, and is disposed between the surface forming mold and the coating film forming mold,
The method for producing an in-mold coated product according to claim 1, wherein the surface forming mold is switched to the coating film forming mold by rotating the back surface forming mold so that the front and back surfaces are exchanged. The in-mold coated product according to any one of claims 1 to 3, further comprising a step of pressurizing the injected thermosetting paint substantially simultaneously with completion of injection of the thermosetting paint into the coating cavity. Manufacturing method. A coating film adhesive film used in the method for producing an in-mold coated product according to any one of claims 1 to 4,
A base film,
A release layer formed on one side of the base film;
The coating film adhesive film provided with the coating film adhesion layer containing the acrylic acid monomer formed on the said mold release layer. The coating film adhesive film according to claim 5, wherein the coating film adhesive layer contains a reaction catalyst. It further comprises a design layer formed on the coating film adhesive layer,
The coating film adhesive film according to claim 5 or 6, wherein the coating film adhesive layer is transparent.

Images