JP2009006612A - Decorative sheet, method for producing decorative sheet, and method for producing decorative molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet free from the generation of cracks and having excellent metallic luster even in a part with a high rising shape, and simultaneously exhibiting metal luster free from light leakage even if being irradiated with back light. <P>SOLUTION: The decorative sheet in which at least a first metal film layer and a second metal film layer are formed on a substrate sheet is characterized in that the surface of the first metal film layer is provided with a lamination forming part superimposed with the second metal film layer and a non-lamination forming part not superimposed with the second metal film layer. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a decorative sheet in which a plurality of metal film layers are laminated, a method for manufacturing a decorative sheet, and a method for manufacturing a decorative molded product.

  Conventionally, a decorative sheet has been used to decorate the surface of an article. There is a transfer method as a method of decorating the surface of an object to be transferred with a decorative sheet. The transfer method uses a transfer sheet in which a transfer layer composed of a release layer, a pattern layer, an adhesive layer, and the like is formed on a base sheet. After the heat and pressure are applied to the transfer layer, the base sheet is This is a method of performing decoration by peeling and transferring only the transfer layer to the surface of the transfer object. In addition, when the material to be transferred is a resin molded product, there is a simultaneous molding transfer method as a method for performing the transfer method more rationally. The molding simultaneous transfer method is a method in which a transfer sheet is sandwiched in a molding die, a resin is injected and filled in the die, and cooled to obtain a resin molded product. In this method, the substrate sheet is peeled off and the transfer layer is transferred to the surface of the transfer object to decorate.

  And as a technique of the decoration sheet | seat in which the some metal film was laminated | stacked and formed on the base sheet, there exists a patent document 1 conventionally. In this technique, an Sn film having an island-like structure formed with a film thickness of 10 to 35% and an Al film formed with a film thickness of 30 to 40% in total light transmittance are laminated adjacently. Therefore, it is characterized in that the generation of scratches on the Sn film is prevented when removing with water.

Japanese Patent Application Laid-Open No. 2006-281591

  However, although a relatively soft Sn film alone does not easily crack, the decorative sheet has a relatively hard and crack-prone Al film laminated on it, so that the entire layer becomes hard and the film is stretched. There was a problem that cracks were likely to occur. Therefore, there is a problem that cracks occur when decorating a three-dimensional portion having a large rising shape.

  In addition, since both of the metal films have high light transmittance, there are disadvantages that they are easily transmissive and pinholes are easily generated. For this reason, if it is illuminated from behind, the defect defect becomes more conspicuous, and there is a problem that it cannot be applied to a product having an illumination window portion that is illuminated by a backlight of a liquid crystal display panel of a mobile phone, for example. . Note that this problem can be solved if the light transmittance is made lower than the above range, but there is a problem that the radio wave transmission and the like are lowered accordingly.

  The present invention solves the above-mentioned problems, exhibits an excellent metallic luster without cracks even at a large rising shape, and at the same time, an excellent metallic luster that does not leak even when illuminated by a backlight. It is an object to provide a decorative sheet for exhibiting the above, a manufacturing method thereof, and a manufacturing method of a decorative molded product.

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

  The decorative sheet of the present invention is a decorative sheet in which at least a first metal film layer and a second metal film layer are formed on a base sheet, and overlaps the second metal film layer on the first metal film layer. It is characterized by comprising a lamination formation part and a non-lamination formation part that does not overlap the second metal film layer. In the decorative sheet of the present invention, the first metal film layer may be composed of a radio wave permeable metal film layer, the second metal film layer may be composed of a radio wave shielding metal film layer, and the first metal film layer is Further, the second metal film layer may be made of aluminum. The second metal film layer may be made of one or more metals selected from the group consisting of tin, indium, zinc, and chromium.

  In the method for producing a decorative sheet according to the present invention, a first metal film layer is formed on a base sheet, a water-soluble pattern layer is formed on a part of the first metal film layer, and a second metal film layer is formed. Then, by peeling off a part of the water-soluble pattern layer and the second metal film layer by the water washing treatment, the laminated formation portion overlapping the second metal film layer and the second metal film layer do not overlap the first metal film layer And forming a non-stacked portion.

  The method for producing a decorative molded product according to the present invention is characterized in that the decorative sheet described in any of the above is placed in a mold, and then a molding simultaneous decoration method is used in which a molding resin is filled. In that case, a non-lamination formation part may be formed in an antenna built-in part, and a lamination formation part may be formed in parts other than an antenna built-in part. Further, a non-lamination forming portion may be formed at the rising end portion, and an illumination transmitting portion surrounded by the lamination forming portion may be formed at a portion other than the rising end portion.

  Since the decorative sheet of the present invention has the above-described configuration, it has the following excellent effects.

  The decorative sheet of the present invention is a decorative sheet in which a first metal film layer and a second metal film layer are formed, and the first and second metal film layers overlap with the second metal film layer and A non-lamination forming portion that does not overlap with the two metal film layers, and the second metal film layer is entirely or partially laminated on a part of the first metal film layer. Therefore, if the decorative sheet is used, a part of only the first metal film layer and a part in which the first metal film layer and the second metal film layer are laminated and formed at a desired place on the surface of the molded article are partially and There is an effect that can be decorated in parallel at the same time. The part of only the first metal film layer and the part in which the first metal film layer and the second metal film layer are laminated are partially and in parallel because each part is a part of the surface of the base sheet. It is formed in a state where they are arranged in a line without overlapping each other.

  Since the manufacturing method of the decorative molded product of the present invention has the configuration as described above, it has the following excellent effects.

  The method for producing a decorative molded product according to the present invention is such that a non-laminated forming portion consisting only of a radio wave permeable metal film layer is formed in an antenna built-in portion of the molded product, and a radio wave shielding metal film is formed in a portion other than the antenna built-in portion. Since the layer forming portion in which the layers are stacked is formed, there is an effect that it is possible to obtain a decorative molded product in which a metal film layer having good antenna transmission / reception performance is formed while having radio wave shielding properties.

  Further, the method for producing a decorative molded product according to the present invention forms a non-laminated formation portion composed of only one or more metal film layers selected from the group consisting of tin, indium, zinc, and chromium at the rising end portion of the molded product. Since the vicinity of the backlight installation location, which is a portion other than the edge portion, is surrounded by a laminate formation part where this metal film layer and aluminum metal film layer are laminated, excellent metallic luster without cracks occurring even in places where the rising shape is large At the same time, there is an effect that it is possible to obtain a decorative molded product that exhibits an excellent metallic luster without light leakage even when illuminated by a backlight.

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

  FIG. 1 is a cross-sectional view showing a decorative sheet of the present invention. FIG. 2 is a process diagram showing the method for producing a decorative sheet of the present invention. FIG. 3 is a cross-sectional view showing a state in which a built-in antenna is installed in a decorative molded product manufactured by the decorative sheet of the present invention. FIG. 4 is a cross-sectional view showing a state in which a backlight is installed on a decorative molded product manufactured by the decorative sheet of the present invention. In the figure, 1 is a base sheet, 2 is a release layer, 3 is a release layer, 4 is a pattern layer, 6 is a first metal film layer, 7 is a water-soluble pattern layer, 8 is a second metal film layer, and 9 is an adhesive. Layers, 10 is a molded resin, 11 is a built-in antenna, 12 is a backlight, 21 is a built-in antenna part, 22 is a non-laminated part, 23 is a laminated part, 31 is a rising edge part, 32 is a non-laminated part, 33 Is a laminated formation part, 34 is an illumination transmission part, 41 is a decorative molded product.

  The decorative sheet of the present invention is a decorative sheet in which at least a first metal film layer and a second metal film layer are formed on a base sheet, and overlaps the second metal film layer on the first metal film layer. And a non-lamination forming portion that does not overlap the lamination forming portion and the second metal film layer. In other words, the decorative sheet of the present invention is obtained by laminating all or part of the second metal film layer on part of the first metal film layer. The fact that the entire second metal film layer is laminated on a part of the first metal film layer means that the second metal film layer is formed only at a part of the first metal film layer (see FIG. 2 (c)). Further, a part of the second metal film layer is laminated on a part of the first metal film layer means that the first metal film layer is partially formed on the base sheet in the state where the first metal film layer is partially formed. In addition to a part of the metal film layer, the second metal film layer is also formed at a location where the first metal film layer is not formed. In addition, a state in which all of the second metal film layer is laminated on a part of the first metal film layer and a state in which a part of the second metal film layer is laminated on a part of the first metal film layer are: In both cases, it can be said that the non-lamination forming portion, which is only the first metal film layer, and the lamination formation portion in which the first metal film layer and the second metal film layer are laminated are formed partially and in parallel.

  In the method for producing a decorative sheet according to the present invention, a first metal film layer is formed on a base sheet, a water-soluble pattern layer is formed on a part of the first metal film layer, and a second metal film layer is formed. Then, by peeling off a part of the water-soluble pattern layer and the second metal film layer by the water washing treatment, the laminated formation portion overlapping the second metal film layer and the second metal film layer do not overlap the first metal film layer It consists of the process of forming a non-stacking formation part (refer to Drawing 2 (a)-(c)).

  As a material of the base sheet, a base of a normal decorative sheet such as a polypropylene resin, a polyethylene resin, a polyamide resin, a polyester resin, an acrylic resin, a polyvinyl chloride resin, or a composite of each of the above sheets What is used as a sheet can be used.

  The metal film layer refers to a film whose material is composed only of a metal or a compound thereof.

  The metal film layer is often provided in order to impart a metallic luster. Since the first metal film layer is formed on the base sheet side, that is, the appearance side, it is a beautiful metal film having a glossiness of at least 70 or more by a gloss meter with a measurement angle of 60 degrees (for example, Gloss Checker IG331 manufactured by Horiba, Ltd.). It is preferable. On the other hand, since the second metal film layer is basically covered with the first metal film layer, the metallic luster is not necessarily required. Metals such as aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, and zinc, and alloys or compounds thereof are used depending on the metallic luster color to be expressed.

  Moreover, it is preferable that a metal film layer is equipped with a radio wave permeability or a radio wave shielding property according to the intended purpose of the decorative sheet. Radio wave transmission means that radio waves having a frequency of 1 MHz to 100 GHz can be transmitted by at least 10% or more, while radio wave shielding means that radio waves having a frequency of 1 MHz to 100 GHz can be shielded by 95% or more. In this case, if at least 10% or more of a 100 MHz radio wave can be transmitted, the radio wave is permeable, and if 100 MHz or more can be shielded by 95% or more, the radio wave is not shielded. Evaluation of radio wave permeability and radio wave shielding of the metal film layer is performed by measuring the electric field strength both when the resin molded product with the metal film layer formed near the radio wave generator is installed and when it is not installed. Good. The measurement of electric field strength shall be conducted by installing a test site and radio wave generator as defined in the method for measuring the electric field strength of radio stations that emit extremely weak radio waves as stipulated in Article 6, Paragraph 1, Item 1 of the Radio Law Enforcement Regulations. It is better to set up a measuring instrument and an antenna for measurement. Specifically, the test site is a place where there are no objects that emit radio waves in the surroundings and there are no metal objects that hinder measurement, and the radio wave generator is a 1.5 m high turntable made of wood or other insulating material. Installed above, the measuring instrument uses a spectrum analyzer that can display peak values, and the measurement antenna is a frame type antenna, half frequency resonance type dipole antenna / horn antenna depending on the frequency to be measured, and the measurement is rotated The maximum value of the electric field strength measured by rotating the table and changing the arrangement of the antenna for measurement is defined as the electric field strength of the radio wave.

  Normally, a metal film that easily forms an island-shaped structure such as tin, indium, or zinc has radio wave transmission, and a metal film that does not form an island-shaped structure such as aluminum has radio wave shielding. However, even if it is an aluminum metal film, it is included in the radio wave permeable metal film layer of the present invention when a micro hole is provided in the film and radio waves can be transmitted through the hole by a predetermined amount or more. It is. Specifically, in the case of an aluminum vapor deposition film, if the light transmittance is less than 30%, it is included in the radio wave shielding metal film layer of the present invention. However, even if the light transmittance is less than 30%, the radio wave-transmitting metal film layer of the present invention is formed when nano-order fine holes are provided by about 10% or more of the entire film surface by, for example, nanoimprint technology. Will be included. On the other hand, even if it is a metal film of a deposited film of tin or indium, if the film thickness is increased and the island-like structure is destroyed and the radio wave is shielded more than the predetermined amount, the present invention It is included in the metal film layer of radio wave shielding. Specifically, in the case of a deposited film of tin or indium, if the light transmittance is about 3 to 20%, it is included in the radio wave transmitting metal film layer of the present invention, and the light transmittance is 1%. In the case where the thickness is increased until it is less than the range, it is included in the radio wave shielding metal film layer of the present invention. That is, physical characteristics such as radio wave permeability and radio wave shielding are more dependent on the structure of the metal film than the metal material.

  The metal film layer preferably has extensibility and uniformity depending on the purpose of use of the decorative sheet. Specifically, it is extensible on a three-dimensional shape part with a large undulation change or a rising end part with a large rising shape at the end of the molded product, such that the decorative sheet is greatly stretched in the simultaneous molding method described later. It is preferable to dispose a metal film layer having excellent properties. On the other hand, for example, the decorative sheet is rarely stretched in the vicinity of the light transmission part for visually recognizing the liquid crystal display part of a mobile phone, but light leakage at the time of backlight irradiation of the liquid crystal display part is observed on the outer periphery of the light transmission part. Therefore, it is preferable to dispose a metal film layer having a strong and uniform property on the outer peripheral portion of the illumination transmitting portion. In this case, it is preferable to set the light transmittance of the metal film layer as low as less than about 5% so that the properties of the metal material itself are remarkably exhibited. Note that the illumination transmission portion may or may not have a metal film layer.

  Examples of metallic materials having excellent extensibility include tin, indium, zinc, and chromium, and metallic materials having toughness and excellent properties include aluminum. That is, physical properties such as extensibility and uniformity largely depend on the properties of the metal material itself rather than the structure of the metal film.

  As a method for forming the metal film layer, there are methods such as plating in addition to the vacuum evaporation method and the sputtering method. The film thickness varies greatly depending on the material, but about 0.01 to 0.1 μm is appropriate.

  The water-soluble pattern layer is a pattern layer that can be peeled off by washing with water. As a guide, the decorative sheet on which the layer is formed is immersed in water and a load of about 9.8 N (1 kg weight) is applied to the finger pad. A pattern layer that, when rubbed, peels off within 100 rubs. The water-soluble pattern layer is provided in a portion that does not require the metal film layer, and is peeled off together with a part of the metal film layer.

  Examples of the material include resins such as polyvinyl alcohol, water-soluble acrylic, water-soluble polyurethane, and hydroxy cellulose, and they may be formed by a general-purpose printing method such as gravure printing or screen printing. It is preferable to add additives such as extender pigments in order to improve printing suitability and peelability.

  The film thickness is preferably in the range of 0.2 μm to 10 μm.

  The water-soluble pattern layer may be formed by a general printing method such as gravure printing or screen printing, or by an on-demand printing method such as an ink jet method or a toner method. In particular, when the decorative layer is formed before the metal film layer is provided and alignment with the pattern of the decorative layer is necessary, it is preferable to form the decorative layer by a digital printing method.

  In the general-purpose printing method, the base sheet expands and contracts depending on the material of the base sheet in the step before providing the water-soluble pattern. Therefore, the spacing between the decorative layers does not match the spacing between the water-soluble pattern layer forming patterns on the printing plate, and the positions of the decorative layer and the water-soluble pattern layer do not match. On the other hand, in the method by digital printing, there is no plate used for printing methods such as gravure printing and screen printing. And by changing the position of the water-soluble pattern layer, the shape of the water-soluble pattern layer and the distance between the water-soluble pattern layers correspondingly even if the decorative sheet is slightly deformed due to expansion and contraction of the base sheet, The position of a decoration layer and a water-soluble pattern layer can be match | combined. Specifically, by measuring the distance between the position detection patterns of adjacent decorative layers, how much the base sheet has expanded and contracted, the position where the water-soluble pattern layer is formed so as to match the elongation rate. The shape of the water-soluble pattern layer and the interval between the water-soluble pattern layers can be changed.

  Methods for removing by washing include a method in which the decorative sheet is immersed in water and then rubbed off with a sponge brush, a method in which the decorative sheet is removed by ultrasonic vibration, and a method in which the decorative sheet is removed by the pressure of running water.

  Not only the second metal film layer but also the first metal film layer may be partially formed. As the formation method, before forming the first metal film layer, another water-soluble pattern layer is formed on the base sheet, and after forming the first metal film layer thereon, this water-soluble pattern is formed by washing with water. There is a method of peeling a part of the layer and the first metal film layer. In that case, the water-soluble pattern layer before forming the first metal film layer and the water-soluble pattern layer after partially forming the first metal film layer are completely the same in material, formation method, film thickness, and peeling method. It may be the same or different. Further, the second metal film layer may be formed at a place where the first metal film layer is not formed.

  A protective layer may be provided on the surface of each metal film layer before the water-soluble pattern is removed by washing with water. The protective layer is a layer that prevents the metal film layer from being damaged by the washing process.

  Examples of the material for the protective layer include polyester, vinyl, water-insoluble acrylic, water-insoluble polyurethane, alkyd, and nitrocellulose resins. The protective layer may contain additives such as extender pigments, color pigments, and dyes.

  The protective layer may be formed by a general-purpose printing method such as gravure printing or screen printing, but for the same reason as the water-soluble pattern layer described above, it is formed by a digital printing method such as an inkjet method or a toner method. Is preferred.

  The thickness of the protective layer is preferably set to a thickness of 1.0 μm to 10 μm. If the film thickness is less than 1.0 μm, pinholes are likely to occur in the protective layer, and water penetrates from the pinholes through the protective layer to the metal thin film layer when washed with water. It is because it may corrode. If the film thickness is 10 μm or more, there is a problem that the step difference from the portion where the protective layer is not formed is too large, and thereafter it is difficult to uniformly apply the adhesive layer or the like over the entire surface.

  Finally, a decorative sheet is completed by providing an adhesive layer or the like as necessary (see FIG. 1).

  The adhesive layer adheres each of the above layers to the surface of the transfer object. The adhesive layer is formed on a portion to be bonded. That is, when the part to be bonded is the entire surface, the adhesive layer is formed on the entire pattern layer. If the part to be bonded is partial, an adhesive layer is partially formed on the pattern layer. As the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the material of the transfer object is appropriately used. For example, when the material of the transfer object is an acrylic resin, an acrylic resin may be used. In addition, when the material of the material to be transferred is polyphenylene oxide / polystyrene resin, polycarbonate resin, styrene copolymer resin, or polystyrene blend resin, acrylic resin, polystyrene resin, polyamide having affinity with these resins A series resin or the like may be used. Further, when the material of the transfer object is a polypropylene resin, chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, cyclized rubber, and coumarone indene resin can be used. Examples of the method for forming the adhesive layer include a coating method such as a gravure coating method, a roll coating method and a comma coating method, a printing method such as a gravure printing method and a screen printing method.

  In addition to the water-soluble pattern layer, the first metal film layer, the second metal film layer, the protective layer, and the adhesive layer, the decorative sheet of the present invention is appropriately provided with a release layer between the base sheet and the water-soluble pattern layer. , A peeling layer, a decorative layer, an anchor layer may be provided, or an anchor layer may be provided between the water-soluble pattern layer, the first metal film layer, the second metal film layer, and the protective layer. An anchor layer / adhesion layer may be provided on the metal film layer, the second metal film layer, and the protective layer.

  The decorative sheet of the present invention includes a transfer sheet from which a substrate sheet is peeled off from a transfer object, and a picture sheet in which the transfer object and the substrate sheet are integrated. In the transfer sheet, a release layer and a release layer are formed as necessary, and in the picture sheet, the release layer and the release layer are not formed.

  In forming the transfer sheet, if the transfer layer is peelable from the base sheet, the transfer layer may be provided directly on the base sheet. In order to improve the peelability of the transfer layer from the substrate sheet, the release layer may be formed on the entire surface before providing the transfer layer on the substrate sheet. The release layer is released from the transfer layer together with the base sheet when the base sheet is peeled off after transfer or after simultaneous molding transfer. In some cases, intra-layer release may occur, and a part may remain on the outermost surface of the transfer layer. As the material of the release layer, melamine resin release agent, silicone resin release agent, fluororesin release agent, cellulose derivative release agent, urea resin release agent, polyolefin resin release agent, Paraffin-type release agents and composite release agents thereof can be used. As a method for forming the release layer, there are 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.

  The release layer is formed entirely or partially on the base sheet or the release layer. The release layer is a layer that peels off from the base sheet or the release layer and becomes the outermost surface of the transfer object when the base sheet is peeled after transfer or after simultaneous molding transfer. The release layer can be made of acrylic resin, polyester resin, polyvinyl chloride resin, cellulose resin, rubber resin, polyurethane resin, polyvinyl acetate resin, or vinyl chloride-vinyl acetate copolymer system. A copolymer such as a resin or an ethylene-vinyl acetate copolymer resin may be used. When the release layer 3 requires hardness, a photo-curing resin such as an ultraviolet curable resin, a radiation curable resin such as an electron beam curable resin, or a thermosetting resin may be selected and used. The release layer may be colored or uncolored. As a method for forming the release layer, there are a coating method such as a gravure coating method, a roll coating method and a comma coating method, a printing method such as a gravure printing method and a screen printing method.

  The pattern layer is usually formed as a printing layer on the release layer. As a material for the printing layer, a resin such as polyvinyl resin, polyamide resin, polyester resin, acrylic resin, polyurethane resin, polyvinyl acetal resin, polyester urethane resin, cellulose ester resin, alkyd resin is used as a binder. A colored ink containing a pigment or dye of an appropriate color as a colorant may be used. As a method for forming the printing layer, a normal printing method such as a gravure printing method, a screen printing method, or an offset printing method may be used. In particular, the offset printing method and the gravure printing method are suitable for performing multicolor printing and gradation expression. In the case of a single color, a coating method such as a gravure coating method, a roll coating method, or a comma coating method may be employed. The print layer may be provided entirely or partially depending on the pattern to be expressed.

  When providing the first metal film layer or the second metal film layer, the front anchor layer or the rear anchor is used in order to improve the adhesion between the other transfer layer and the first metal film layer or the second metal film layer. A layer may be provided. As materials for the front anchor layer and the rear anchor layer, two-component cured urethane resin, thermosetting urethane resin, melamine resin, cellulose ester resin, chlorine-containing rubber resin, chlorine-containing vinyl resin, acrylic resin, epoxy It is preferable to use a vinyl resin, a vinyl copolymer resin, or the like. Examples of methods for forming the front anchor layer and the rear anchor layer include coating methods such as gravure coating, roll coating, and comma coating, printing methods such as gravure printing, and screen printing.

  One of the methods for decorating an object to be decorated using the decorating sheet of the present invention is a molding simultaneous decorating method by injection molding. With the simultaneous molding decoration method, a decorative sheet is placed in a mold, filled with molding resin, and the heat and pressure of the molding resin are used to decorate the surface of the molded article, which is the object to be decorated. It is a method to do.

  The method for using the decorative sheet produced according to the present invention will be described with reference to a transfer sheet as an example, and a method for decorating the surface of a resin molded product, which is a transfer object, using the simultaneous molding method.

  First, a transfer sheet is fed into a molding die composed of a movable die and a fixed die. At that time, a single sheet of transfer sheet may be fed one by one, or a necessary part of a long transfer sheet may be intermittently fed. In the case of using a long transfer sheet, it is preferable to use a feeding device having a positioning mechanism so that the registration of the pattern layer of the transfer sheet and the molding die coincide. In addition, when the transfer sheet is intermittently fed, if the transfer sheet is fixed by the movable mold and the fixed mold after the position of the transfer sheet is detected by the sensor, the transfer sheet can always be fixed at the same position. This is convenient because the positional deviation of the pattern layer does not occur. After the molding die is closed, the molding resin melted from the gate is injected and filled into the die, and at the same time as the transfer object is formed, the transfer sheet is adhered to the surface. After the resin molded product, which is the transfer target, is cooled, the molding die is opened and the resin molded product is taken out. Finally, the transfer is completed by removing the base sheet.

  Examples of the molding resin include general-purpose resins such as polystyrene resin, polyolefin resin, ABS resin, AS resin, and AN resin. Also, general engineering resins such as polyphenylene oxide / polystyrene resins, polycarbonate resins, polyacetal resins, acrylic resins, polycarbonate-modified polyphenylene ether resins, polybutylene terephthalate resins, ultrahigh molecular weight polyethylene resins, polysulfone resins, polyphenylene sulfide resins Super engineering resins such as polyphenylene oxide resins, polyarylate resins, polyetherimide resins, polyimide resins, liquid crystal polyester resins, and polyallyl heat-resistant resins can also be used.

  A release layer, a release layer, and a pattern layer are sequentially laminated on the base sheet, and then the first water-soluble pattern layer is partially formed, and then the first metal film layer is formed. The first metal film layer is partially formed by peeling off the layer and a part of the first metal film layer, and then the part on the first metal film layer and the part where the first metal film layer is not formed are formed. After forming the second water-soluble pattern layer, the second metal film layer is laminated and part of the second water-soluble pattern layer and the second metal film layer is peeled off by washing with water, and finally the adhesive layer is formed. Thus, a decorative sheet as a transfer sheet was prepared. The decorative sheet includes a laminated formation portion that overlaps the second metal film layer and a non-laminate formation portion that does not overlap the second metal film layer on the first metal film layer, and a second portion is formed on a part of the first metal film layer. All of the metal film layers are laminated.

  A polyester film (F-55 manufactured by Toray Industries, Inc.) having a film thickness of 38 μm is used as a base sheet, and a release layer having a film thickness of 0.5 μm, acrylic ink (urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.)) is formed thereon. A release layer having a thickness of 0.5 μm was formed by LR101 manufactured by Mitsubishi Rayon Co., Ltd., and a pattern layer having a thickness of 1 μm was formed by gravure printing sequentially using urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.). Next, after forming a first water-soluble pattern layer having a film thickness of 1.5 μm by screen printing with polyvinyl alcohol ink (Emmasoft, Jujo Chemical Co., Ltd.) containing 2% extender pigment (powder silica silicia, manufactured by Fuji Silysia Chemical Co., Ltd.) The first metal film layer made of a tin metal film having a thickness of about 400 mm is formed by vacuum deposition, and then the first water-soluble pattern layer and a part of the first metal film layer are peeled off by washing with water. A first metal film layer having a transmittance of 7% and a glossiness of 90 was formed. Subsequently, after forming a second water-soluble pattern layer having a film thickness of 1.5 μm by screen printing with polyvinyl alcohol ink (Emasoft, Jujo Chemical Co., Ltd.) containing 2% extender pigment (powder silica silicia, manufactured by Fuji Silysia Chemical Co., Ltd.) A light transmittance is obtained by forming a second metal film layer made of an aluminum metal film having a thickness of about 600 mm by a vacuum vapor deposition method, and then removing a part of the second water-soluble pattern layer and the second metal film layer by washing with water. A 0.3% second metal film layer was formed. Finally, an adhesive layer having a thickness of 1 μm was formed by gravure printing using urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.).

  The decorative sheet is placed in a mold as it is long, filled with a molding resin, decorated on the surface of the molded product simultaneously with molding, and then peeled off the base sheet and the release layer to form a card A shaped decorative molded product was manufactured (see FIG. 3, except for the first metal film layer, the second metal film layer, and the molded resin). In that case, it set so that the non-lamination formation part formed only from the radio wave-permeable 1st metal film layer might be formed in the antenna built-in part of a molded article. As a test, small built-in antennas were installed at various locations under the decorative molded product, and when radio wave transmission with a frequency of 100 MHz was measured at each location of the decorative molded product, it was found that only the first metal film layer was formed. The radio wave transmitting part that covers the antenna built-in part of the molded product transmits 90%, and the radio wave is shielded because transmission cannot be confirmed in the laminated part of the first metal film layer and the second metal film layer. It was. When a small built-in antenna was installed in the antenna built-in portion of the molded product, a decorative molded product having a certain radio wave shielding property and good antenna transmission / reception performance as a whole could be obtained.

  In addition, the decorative sheet is three-dimensionally processed in advance by vacuum / pressure forming, cut to a predetermined size and placed in a mold, and then filled with a molding resin, and simultaneously decorated with the surface of the molded product. The base sheet and the release layer were peeled off to produce a three-dimensional decorative molded product (see FIG. 4, except for the first metal film layer, the second metal film layer, and the molding resin). At that time, a non-laminated formation part formed only from the first metal film layer is formed at the rising end of the molded product, and the first metal film layer and the second metal film layer are formed in the vicinity of the backlight installation location. The illumination transmission part surrounded by the part was set to be formed. As a result, it is possible to obtain a decorative molded product that exhibits an excellent metallic luster without cracking even at a large rising shape, and at the same time exhibits an excellent metallic luster that does not leak even when illuminated by a backlight. It was.

  A picture layer is laminated on a base sheet, and then a first water-soluble pattern layer is partially formed thereon, a first metal film layer is formed thereon, and a first water-soluble pattern layer and a first metal are formed by washing with water. After peeling off a part of the film layer, a second water-soluble pattern layer is formed on the entire surface excluding a part of the patterned first metal film layer, and a second metal film layer is laminated thereon. After the second water-soluble pattern layer and part of the second metal film layer were peeled off by washing with water, a decorative sheet, which is a picture sheet for inserts in which an adhesive layer was finally formed, was created. The decorative sheet includes a laminated formation portion that overlaps the second metal film layer and a non-laminate formation portion that does not overlap the second metal film layer on the first metal film layer. All of the metal film layers are laminated.

  A 200 μm-thick acrylic film (HBS-001 manufactured by Mitsubishi Rayon Co., Ltd.) was used as the base sheet, and a 1 μm-thick pattern layer was formed by gravure printing on it with urethane ink (Sakata Inx Co., Ltd. Lamiol Mark III). . Next, after forming a first water-soluble pattern layer having a film thickness of 1.5 μm by screen printing with polyvinyl alcohol ink (Emmasoft, Jujo Chemical Co., Ltd.) containing 2% extender pigment (powder silica silicia, manufactured by Fuji Silysia Chemical Co., Ltd.) The first metal film layer made of a tin metal film having a thickness of about 400 mm is formed by vacuum deposition, and then the first water-soluble pattern layer and a part of the first metal film layer are peeled off by washing with water. A first metal film layer having a transmittance of 10% and a glossiness of 80 was formed. Subsequently, a second water-soluble pattern layer having a film thickness of 0.5 μm is formed by gravure printing with an aqueous acrylic resin (T-COAT manufactured by Toyo Ink Co., Ltd.) containing 1% extender pigment (powder silica silicia manufactured by Fuji Silysia Chemical Co., Ltd.). After that, a second metal film layer made of a copper metal film having a thickness of about 1000 mm is formed by an electroless plating method, and then the second water-soluble pattern layer and a part of the second metal film layer are peeled off by a water washing treatment. As a result, a second metal film layer having a light transmittance of 0.1% was formed. Finally, an adhesive layer having a thickness of 1 μm was formed by gravure printing using urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.).

  Place the decorative sheet in the mold as it is long, fill it with molding resin, decorate the surface of the molded product at the same time as molding, cut and remove unnecessary parts of the decorative sheet to form a card (See FIG. 3, except for the first metal film layer, the second metal film layer, and the molding resin). In that case, it set so that the non-lamination formation part formed only from the radio wave-permeable 1st metal film layer might be formed in the antenna built-in part of a molded article. As a test, small built-in antennas were installed at various locations under the decorative molded product, and when radio wave transmission with a frequency of 100 MHz was measured at each location of the decorative molded product, it was found that only the first metal film layer was formed. The radio wave transmitting part that covers the antenna built-in part of the molded product transmits 95%, and the radio wave is shielded because transmission cannot be confirmed in the laminated part of the first metal film layer and the second metal film layer. It was. When a small built-in antenna was installed in the antenna built-in portion of the molded product, a decorative molded product having a certain radio wave shielding property and good antenna transmission / reception performance as a whole could be obtained.

  In addition, the decorative sheet is three-dimensionally processed in advance by vacuum / pressure forming, cut into a predetermined size and then placed in a mold, and then filled with a molding resin, and simultaneously decorated with the surface of the molded product. Thus, a three-dimensional decorative molded product integrated with the base sheet was produced (see FIG. 4, except for the first metal film layer, the second metal film layer, and the molded resin). At that time, a non-laminated formation part formed only from the first metal film layer is formed at the rising end of the molded product, and the first metal film layer and the second metal film layer are formed in the vicinity of the backlight installation location. The illumination transmission part surrounded by the part was set to be formed. As a result, it is possible to obtain a decorative molded product that exhibits an excellent metallic luster without cracking even at a large rising shape, and at the same time exhibits an excellent metallic luster that does not leak even when illuminated by a backlight. It was.

  A release layer, a release layer, and a pattern layer are sequentially laminated on the base sheet, and then a first water-soluble pattern layer is partially formed, and then a first metal film layer is formed. The first metal film layer is partially formed by peeling off the layer and a part of the first metal film layer, and then the part on the first metal film layer and the part where the first metal film layer is not formed are formed. After forming the second water-soluble pattern layer, the second metal film layer is laminated and part of the second water-soluble pattern layer and the second metal film layer is peeled off by washing with water, and finally the adhesive layer is formed. Thus, a decorative sheet as a transfer sheet was prepared. The decorative sheet includes a laminated formation portion that overlaps the second metal film layer and a non-laminate formation portion that does not overlap the second metal film layer on the first metal film layer. All of the metal film layers are laminated.

  A polyester film (F-55 manufactured by Toray Industries, Inc.) having a film thickness of 38 μm is used as a base sheet, and a release layer having a film thickness of 0.5 μm, acrylic ink (urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.)) is formed thereon. A release layer having a thickness of 0.5 μm was formed by LR101 manufactured by Mitsubishi Rayon Co., Ltd., and a pattern layer having a thickness of 1 μm was formed by gravure printing sequentially using urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.). Next, after forming a first water-soluble pattern layer having a film thickness of 1.5 μm by screen printing with polyvinyl alcohol ink (Emmasoft, Jujo Chemical Co., Ltd.) containing 2% extender pigment (powder silica silicia, manufactured by Fuji Silysia Chemical Co., Ltd.) The first metal film layer made of a tin metal film having a thickness of about 400 mm is formed by vacuum deposition, and then the first water-soluble pattern layer and a part of the first metal film layer are peeled off by washing with water. A first metal film layer having a transmittance of 7% and a glossiness of 90 was formed. Subsequently, after forming a second water-soluble pattern layer having a film thickness of 1.5 μm by screen printing with polyvinyl alcohol ink (Emasoft, Jujo Chemical Co., Ltd.) containing 2% extender pigment (powder silica silicia, manufactured by Fuji Silysia Chemical Co., Ltd.) A light transmittance is obtained by forming a second metal film layer made of a tin metal film having a thickness of about 2000 mm by a vacuum deposition method, and then peeling off a part of the second water-soluble pattern layer and the second metal film layer by washing with water. Formed a 1% second metal film layer. Finally, an adhesive layer having a thickness of 1 μm was formed by gravure printing using urethane ink (Lamiol Mark III manufactured by Sakata Inx Co., Ltd.).

  The decorative sheet is placed in a mold as it is long, filled with a molding resin, decorated on the surface of the molded product simultaneously with molding, and then peeled off the base sheet and the release layer to form a card A shaped decorative molded product was manufactured (see FIG. 3, except for the first metal film layer, the second metal film layer, and the molded resin). In that case, it set so that the non-lamination formation part formed only from the radio wave-permeable 1st metal film layer might be formed in the antenna built-in part of a molded article. As a test, small built-in antennas were installed at various locations under the decorative molded product, and when radio wave transmission with a frequency of 100 MHz was measured at each location of the decorative molded product, it was found that only the first metal film layer was formed. The radio wave transmission part covering the antenna built-in part of the molded product transmits 90%, and the radio wave transmission is about 2% in the lamination formation part of the first metal film layer and the second metal film layer. It was shielded. When a small built-in antenna was installed in the antenna built-in portion of the molded product, a decorative molded product having a certain radio wave shielding property and good antenna transmission / reception performance as a whole could be obtained.

  In addition, the decorative sheet is three-dimensionally processed in advance by vacuum / pressure forming, cut to a predetermined size and placed in a mold, and then filled with a molding resin, and simultaneously decorated with the surface of the molded product. The base sheet and the release layer were peeled off to produce a three-dimensional decorative molded product (see FIG. 4, except for the first metal film layer, the second metal film layer, and the molding resin). At that time, a non-laminated formation part formed only from the first metal film layer is formed at the rising end of the molded product, and the first metal film layer and the second metal film layer are formed in the vicinity of the backlight installation location. The illumination transmission part surrounded by the part was set to be formed. As a result, it is possible to obtain a decorative molded product that exhibits an excellent metallic luster without cracking even at a large rising shape, and at the same time exhibits an excellent metallic luster that does not leak even when illuminated by a backlight. It was.

It is sectional drawing which shows the decorating sheet of this invention. It is process drawing which shows the manufacturing method of the decorating sheet of this invention. It is sectional drawing which shows the state by which the built-in antenna was installed in the decorative molded product manufactured with the decorating sheet of this invention. It is sectional drawing which shows the state by which the backlight was installed in the decorative molded product manufactured with the decorating sheet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base sheet 2 Release layer 3 Peeling layer 4 Picture layer 6 First metal film layer 7 Water-soluble pattern layer 8 Second metal film layer 9 Adhesive layer 10 Molding resin 11 Built-in antenna 12 Backlight 21 Built-in antenna part 22 Non-lamination formation Part 23 Lamination forming part 31 Rising end part 32 Non-lamination forming part 33 Lamination forming part 34 Illuminating transmission part 41 Decorative molded product

Claims (7)

  A decorative sheet in which at least a first metal film layer and a second metal film layer are formed on a base sheet, wherein the laminate forming portion and the second metal film overlap the second metal film layer on the first metal film layer A decorative sheet comprising a non-laminate forming portion that does not overlap with a layer.   The decorative sheet according to claim 1, wherein the first metal film layer comprises a radio wave permeable metal film layer, and the second metal film layer comprises a radio wave shielding metal film layer.   The decorative sheet according to claim 1, wherein the first metal film layer is made of one or more metals selected from the group consisting of tin, indium, zinc, and chromium, and the second metal film layer is made of aluminum.   A first metal film layer is formed on the substrate sheet, a water-soluble pattern layer is formed on a part of the first metal film layer, a second metal film layer is formed, and the water-soluble pattern layer and the first metal film layer are washed and washed. A part of the two metal film layer is peeled to form a stacked formation part that overlaps the second metal film layer and a non-stacking part that does not overlap the second metal film layer on the first metal film layer. The manufacturing method of the decorating sheet in any one of Claims 1-3.   A method for producing a decorative molded product, wherein the decorative sheet according to any one of claims 1 to 3 is placed in a mold and then a molding simultaneous decorating method in which a molding resin is filled is used.   The decorative sheet according to claim 2 is placed in a mold, and then a non-laminated forming portion is formed in the antenna built-in portion using a molding simultaneous decorating method in which a molding resin is filled, A method for producing a decorative molded product, comprising forming a lamination forming portion in a portion.   The decorative sheet according to claim 3 is placed in a mold, and then a non-laminated forming portion is formed at a rising end portion using a molding simultaneous decoration method in which a molding resin is filled, and other than the rising end portion. A method for producing a decorative molded product, comprising: forming an illumination transmission part surrounded by a lamination forming part in a part.

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