WO2009150800A1 - Feuille de transfert contenant un éliminateur de franges d’interférence et résine moulée décorative - Google Patents

Feuille de transfert contenant un éliminateur de franges d’interférence et résine moulée décorative Download PDF

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Publication number
WO2009150800A1
WO2009150800A1 PCT/JP2009/002512 JP2009002512W WO2009150800A1 WO 2009150800 A1 WO2009150800 A1 WO 2009150800A1 JP 2009002512 W JP2009002512 W JP 2009002512W WO 2009150800 A1 WO2009150800 A1 WO 2009150800A1
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WIPO (PCT)
Prior art keywords
layer
light
transmission
reflection
thin film
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PCT/JP2009/002512
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English (en)
Japanese (ja)
Inventor
笠原拓也
松本篤昌
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日本写真印刷株式会社
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Publication date
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Publication of WO2009150800A1 publication Critical patent/WO2009150800A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects

Definitions

  • the present invention relates to a transfer sheet used for decorating resin molded products and the like and decorative resin molded products. More specifically, the present invention relates to a transfer sheet that is a decorative means such as a metal thin film, and prevents interference fringes from being generated on the surface of a resin molded product after transfer. More specifically, the present invention relates to a decorative resin molded product in which interference fringes are prevented from occurring on the surface of the decorative resin molded product decorated with a metal thin film or the like.
  • a transfer sheet used for decorating a resin molded product and decorating a metal thin film is known.
  • a transfer sheet for example, a release layer, a front anchor layer, a metal thin film layer, a rear anchor layer, and an adhesive layer are laminated on a base film in the order of description.
  • a glossy layer for example, a gloss layer
  • FIG. 9 is a cross-sectional explanatory view illustrating incident light and reflected light in a conventional decorative resin molded product including a metal thin film layer.
  • the adhesive layer 124, the metal thin film layer 126, and the light transmission layer 111 are laminated in the order described on one surface of the molding resin 131.
  • a part of the incident light 161 that is visible light is reflected by the surface 151 of the light transmission layer 111.
  • the reflected light is referred to as surface reflected light 162.
  • a part of the incident light 161 is transmitted through the light transmission layer 111 and reaches the reflection / transmission boundary surface 131, and a part thereof is reflected.
  • the reflected light is referred to as interface reflected light 163.
  • the surface reflected light 162 and the interface reflected light 163 interfere with each other, and interference fringes are observed.
  • visible light means light having a wavelength of 380 nm to 780 nm.
  • the light transmission layer 111 is a homogeneous layer or a plurality of layers, interference fringes are generated.
  • the light transmission layer 111 is composed of two layers, a peeling layer and a front anchor layer. If the light transmissive layer allows the metal thin film layer to be visually observed through the light transmissive layer, the condition for generating interference fringes is satisfied.
  • the interference fringes are clearly visible.
  • the light reflectance of the laminated structure composed of the light transmission layer 111 and the metal thin film layer 126 is 5 to 50%, the interference fringes are clearly visible. If the light reflectance exceeds 50%, the reflected light from the metal thin film layer becomes dominant and the interference fringes are hardly visually recognized. If the light reflectance is less than 5%, the reflected light from the metal thin film layer becomes inferior, and the interference fringes are hardly visually recognized.
  • light transmission, light transmittance, light reflection, and light reflectance indicate properties relating to light in the wavelength range of 380 nm to 780 nm.
  • FIG. 10 is an explanatory cross-sectional view illustrating incident light and reflected light in a conventional decorative molded product including a gloss layer.
  • a gloss layer 127 and a light transmission layer 111 are laminated in the order described on one surface side of the molding resin 131.
  • Part of the incident light 161 that is visible light is reflected by the surface 151 of the light transmission layer 111.
  • the reflected light is referred to as surface reflected light 162.
  • a part of the incident light 161 is transmitted through the light transmission layer 111 and reaches the surface 168 of the glossy layer 127, and a part thereof is reflected.
  • the reflected light is referred to as gloss layer reflected light 164.
  • the surface reflection light 162 and the glossy layer reflection light 164 are combined to form the total reflection light 165, and the total reflection light is visually observed.
  • the optical distance from the surface 151 of the light transmission layer 111 to the surface 168 of the glossy layer 127 is an integral multiple of the wavelength of incident / reflected light
  • the surface reflection light 162 and the glossy layer reflection light 164 are strengthened.
  • the total reflected light 165 increases.
  • the optical distance twice is an integer multiple of the wavelength and a difference between the half wavelength
  • the surface reflected light 162 and the glossy layer reflected light 164 cancel each other, and the total reflected light 165 is weakened.
  • FIG. 11 is a graph showing the spectral reflectance when the laminated structure in which the light transmission layer 111 and the gloss layer 127 are laminated is irradiated with visible light.
  • a graph 70 shown in FIG. 11A is an explanatory diagram of the spectral reflectance when the gloss layer is black
  • a graph 80 shown in FIG. 11B is an explanation of the spectral reflectance when the gloss layer is another color.
  • FIG. Spectral reflectance repeats maximum and minimum as the wavelength changes. In FIG. 11A, a first maximum point 71, a first minimum point 72, a second maximum point 73, a second minimum point 74, and the like appear alternately.
  • Interference fringes are easy to see when the average value of all change values in the visible light region is 0.5% or more with the reflectance values at the maximum and minimum points as change values. That is, the absolute value of the difference between the reflectance at the first maximum point 71 and the reflectance at the first minimum point 72, and the absolute value of the difference between the reflectance at the first minimum point 72 and the reflectance at the second minimum point When the absolute value of the difference between the reflectance at the second maximum point 73 and the reflectance at the second minimum point 74, the absolute value of the difference is obtained in the same manner, and the average value of these is 0.5% or more. Interference fringes are easier to see. Even in the graph 80 shown in FIG. 11B, there are a first maximum point 81, a first minimum point 82, a second maximum point 83, a second minimum point 84, and the like. It is.
  • the interference fringes are clearly visible. In other words, if the light reflectance of the laminated structure composed of the light transmission layer 111 and the gloss layer 127 is 3 to 10%, the interference fringes are clearly visible.
  • interference fringes occur in the decorative resin molded product after transfer in the transfer sheet that decorates the light transmission layer and the light reflection layer. Further, in the decorative resin molded product in which the light transmission layer and the light reflection layer are laminated, interference fringes are generated.
  • a transfer sheet according to an aspect of the present invention is a transfer sheet in which a light transmission layer and a light reflection layer are laminated on one surface of a base sheet, and is located anywhere between the light transmission layer and a reflection / transmission interface. Is a transfer sheet having a boundary surface that generates light scattering.
  • the light transmission layer may be a single layer or a plurality of layers.
  • the light reflecting layer is either a metal thin film layer or a gloss layer.
  • the light reflectance of the laminated structure in which the light transmission layer and the metal thin film layer are laminated is 5% to 50%.
  • the light reflectance is determined by measuring light reflected from the light transmission layer side.
  • a light transmission layer is formed on one surface of the base sheet, an anchor layer is laminated on the light transmission layer, a metal thin film layer is further laminated on the anchor layer, and adhesion is further performed.
  • the light transmission layer, the anchor layer, and the metal thin film layer on the transfer sheet may or may not contain an interference fringe preventing agent.
  • the layer structure on the transfer sheet is transferred to a resin molded product, and then the base sheet is removed.
  • the light reflectance of the decorative resin molded product is measured. The value of the light reflectance measured in this way is taken as the light reflectance of the laminated structure in which the light transmission layer and the metal thin film layer are laminated.
  • the light reflectance of the laminated structure in which the light transmission layer and the gloss layer are laminated is 3% to 10%.
  • the light reflectance is determined by measuring light reflected from the light transmission layer side.
  • a light-transmitting layer is formed on one surface of the base sheet
  • a gloss layer is laminated on the light-transmitting layer
  • a transfer sheet is further laminated on the gloss layer.
  • the light transmission layer and the gloss layer on the transfer sheet may or may not contain an interference fringe preventing agent.
  • the layer structure on the transfer sheet is transferred to a resin molded product, and then the base sheet is removed.
  • the light reflectance of the decorative resin molded product is measured. The value of the light reflectance measured in this way is taken as the light reflectance of the laminated structure in which the light transmission layer and the gloss layer are laminated.
  • the boundary surface that causes light scattering may be a transmission / transmission boundary surface that is a boundary surface between light transmission layers.
  • the transmission / transmission interface is located in the light transmission layer.
  • the boundary surface can be located in the light transmission layer when the light transmission layer is composed of a plurality of layers.
  • the boundary surface that causes light scattering may be a reflection / transmission boundary surface that is a boundary surface between the light reflection layer and the light transmission layer.
  • an interference fringe preventing agent composed of fine particles is included in one of the two layers sandwiching the boundary surface.
  • the interference fringe inhibitor may have an average particle size of 0.5 ⁇ m to 20 ⁇ m.
  • the light-scattering boundary surface may have a root mean square roughness of 0.1 ⁇ m to 5 ⁇ m.
  • the transfer sheet according to another preferred embodiment of the present invention is: A release layer that is a first light transmission layer is formed on one surface of the base sheet, an anchor layer that is a second light transmission layer is laminated on the release layer, and a light reflection layer is formed on the anchor layer.
  • a reflection / transmission interface which is an interface between the metal thin film layer and the anchor layer; By including an interference fringe inhibitor made of fine particles in the anchor layer, It is characterized by a boundary surface that causes light scattering.
  • the transfer sheet according to another preferred embodiment of the present invention is: A release layer, which is a light transmission layer, is formed on one surface of the base sheet, and a gloss layer is laminated on the release layer, and the light reflectance of the laminated structure including the release layer and the gloss layer is In a transfer sheet that is 3% to 10%, A reflection / transmission interface that is an interface between the light reflection layer and the light transmission layer, By including an interference fringe inhibitor made of fine particles in the gloss layer, It is characterized by a boundary surface that causes light scattering.
  • the decorative resin molded product according to another aspect of the present invention is A single layer or a plurality of light transmission layers are formed on the outermost surface side of the resin molded product, and a laminated structure comprising a metal thin film layer inside the light transmission layer and comprising the light transmission layer and the metal thin film layer
  • the metallic thin film layer having a light reflectance of 5% to 50% and a glossy layer, wherein the laminated structure comprising the light transmitting layer and the glossy layer has a light reflectance of 3% to 10%.
  • a light reflecting layer that is one layer selected from the group consisting of: A reflection / transmission boundary surface that is a boundary surface between the light reflection layer and the light transmission layer or a transmission / transmission interface surface that is a boundary surface between the light transmission layers;
  • an interference fringe preventing agent composed of fine particles in either the reflection / transmission interface or the two layers forming the transmission / transmission interface, It is characterized by a boundary surface that causes light scattering.
  • the decorative resin molded product according to a preferred embodiment of the present invention is A release layer that is a first light transmission layer is formed on the outermost surface side of the resin molded product, an anchor layer that is a second light transmission layer is laminated inside the release layer, and a light reflection layer is formed inside the anchor layer.
  • a reflection / transmission interface which is an interface between the metal thin film layer and the anchor layer; By including an interference fringe inhibitor made of fine particles in the anchor layer, It is characterized by a boundary surface that causes light scattering.
  • the decorative resin molded product according to another preferred embodiment of the present invention is A release layer, which is a light transmission layer, is formed on the outermost surface side of the resin molded product, and a gloss layer is laminated inside the release layer, and the light reflectance of the laminated structure including the release layer and the gloss layer
  • a reflection / transmission interface that is an interface between the light reflection layer and the light transmission layer, By including an interference fringe inhibitor made of fine particles in the gloss layer, It is characterized by a boundary surface that causes light scattering.
  • the transfer sheet of the present invention is a transfer sheet in which a boundary surface that causes light scattering is formed between the light transmission layer and the reflection / transmission boundary surface, along with other configurations, and a decorative molding obtained using the transfer sheet
  • the product has the advantage that it can suppress the generation of interference fringes and has a high decorative property.
  • the decorative resin molded product of the present invention together with other configurations, formed a boundary surface that causes light scattering between the light transmission layer and the reflection / transmission boundary surface. There are benefits to be gained.
  • FIG. 1 is an explanatory cross-sectional view of the first transfer sheet.
  • FIG. 2 is a cross-sectional explanatory view of the second transfer sheet.
  • FIG. 3 is a cross-sectional explanatory view of the first decorative resin molded product.
  • FIG. 4 is a cross-sectional explanatory view of a second decorative resin molded product.
  • FIG. 5 is a process explanatory view of a method for producing a decorated resin molded product by a simultaneous molding transfer method using the first transfer sheet.
  • FIG. 6 is a cross-sectional explanatory view illustrating incident light and reflected light in the first decorative resin molded product.
  • FIG. 7 is an explanatory diagram for explaining the surface state of the gloss layer
  • (a) is an explanatory diagram of the surface of the gloss layer containing the interference fringe preventing agent
  • (b) is a diagram of the gloss layer surface not containing the interference fringe preventing agent. It is explanatory drawing.
  • FIG. 8 is an explanatory diagram for explaining the expression of the thickness of the layer containing the interference fringe preventing agent.
  • FIG. 9 is an explanatory cross-sectional view illustrating incident light and reflected light in a conventional decorative resin molded product including a metal thin film layer.
  • FIG. 10 is an explanatory cross-sectional view illustrating incident light and reflected light in a conventional decorative resin molded product including a gloss layer.
  • FIG. 11 is an explanatory graph of spectral reflectance from a conventional decorative resin molded product including a glossy layer
  • (a) is a spectral reflectance graph from a conventional decorative resin molded product including a black glossy layer
  • (B) is the spectral reflectance graph from the conventional decorative resin molded product containing the gloss layer of another color.
  • FIG. 1 is an explanatory sectional view of a first transfer sheet 1 according to the present invention.
  • a release layer 22, an anchor layer 23, a metal thin film layer 26 and an adhesive layer 24 are sequentially laminated on one surface of a base sheet 21.
  • the release layer 22 and the anchor layer 23 are layers that transmit light.
  • the release layer 22 and the anchor layer 23 form a light transmission layer.
  • the metal thin film layer 26 is a light reflecting layer.
  • the metal thin film layer 26 is light semi-transmissive.
  • the boundary surface between the anchor layer 23 and the metal thin film layer 26 is a reflection / transmission boundary surface 13.
  • the two layers forming the reflection / transmission interface 13 are an anchor layer 23 and a metal thin film layer 26.
  • the anchor layer 23 which is one of these layers contains the interference fringe preventing agent 6 made of fine particles.
  • the base sheet 21 is a resin sheet such as polypropylene resin, polyethylene resin, polyamide resin, polyester resin, acrylic resin or polyvinyl chloride resin, metal foil such as aluminum foil or copper foil, glassine paper, coated paper.
  • resin sheet such as polypropylene resin, polyethylene resin, polyamide resin, polyester resin, acrylic resin or polyvinyl chloride resin, metal foil such as aluminum foil or copper foil, glassine paper, coated paper.
  • Cellulose-based sheets such as cellophane, or composites of the above respective sheets can be used.
  • the release layer 22 is a layer that becomes the outermost surface of the transfer object after transfer.
  • the release layer 2 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. Examples thereof include a resin and a copolymer such as an ethylene-vinyl acetate copolymer resin.
  • Examples of the method for forming the release layer 22 include a coating method such as a gravure coating method, a roll coating method, a comma coating method, and a lip coating method, and a printing method such as a gravure printing method and a screen printing method.
  • the anchor layer 23 is a layer that improves the adhesion between the release layer 22 and the metal thin film layer 26.
  • the anchor layer 23 contains the interference fringe preventing agent 6.
  • the material of the anchor layer 23 is a two-component cured urethane resin, a thermosetting urethane resin, a melamine resin, a cellulose ester resin, a chlorine-containing rubber resin, a chlorine-containing vinyl resin, an acrylic resin, an epoxy resin, or a vinyl resin.
  • a copolymer resin or the like can be used.
  • a gravure coating method As for the formation method of the anchor layer 3, after mixing the interference fringe preventing agent 6 described below into the anchor layer material, a gravure coating method, a roll coating method, a comma coating method, a coating method such as a lip coating method, a gravure printing method, There are printing methods such as screen printing.
  • the formation method of the metal thin film layer 26 is a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like.
  • the material of the metal thin film is a metal such as aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, or zinc, or an alloy or compound thereof.
  • the adhesive layer 24 adheres the surface layer of the decorated resin molded product and the metal thin film layer 26.
  • a known resin conventionally used for transfer sheets is used.
  • a known forming method conventionally used for transfer sheets may be selected.
  • the light reflectance of the laminated structure composed of the release layer 22, the anchor layer 23, and the metal thin film layer 26 is 5% to 50%.
  • a laminate structure composed of a release layer 22, an anchor layer 23 and a metal thin film layer 26 is formed on a base sheet, and a transfer sheet is further formed with an adhesive layer.
  • the light reflectivity of the said decorative resin molded product is measured, and let this measured value be the light reflectivity of a laminated structure.
  • the incident direction of light is the same as described in the means for solving the problem. This is because a conventional decorative resin molded product including a laminated structure having a light reflectance in the above range produces interference fringes.
  • FIG. 3 is a cross-sectional explanatory view of the first decorative resin molded product.
  • an adhesive layer 24, a metal thin film layer 26, an anchor layer 23, and a release layer 22 are sequentially laminated on one surface of a molded resin 31.
  • the metal thin film layer 26 is a light reflecting layer.
  • the metal thin film layer 26 is light semi-transmissive.
  • the release layer 22 and the anchor layer 23 are layers that transmit light.
  • the release layer 22 and the anchor layer 23 form a light transmission layer.
  • the first decorative resin molded product 3 is manufactured by transferring the first transfer sheet 1 to a molding resin, and each layer laminated is the same as the first transfer sheet 1.
  • the boundary surface between the anchor layer 23 and the metal thin film layer 26 is the reflection / transmission boundary surface 13.
  • the two layers forming the reflection / transmission interface 13 are an anchor layer 23 and a metal thin film layer 26.
  • the anchor layer 23 which is one of these layers contains the interference fringe preventing agent 6 made of fine particles.
  • FIG. 6 is an explanatory sectional view for explaining incident light and reflected light in the first decorative resin molded product.
  • incident light 61 When incident light 61 is irradiated on the first decorative resin molded product 3, a part of the incident light is reflected by the surface 15. The reflected light is referred to as surface reflected light 62.
  • a part of the incident light 61 is transmitted through the peeling layer 22 and the anchor layer 23 which are light transmission layers, and reaches the reflection / transmission interface 13.
  • the incident light 61 is scattered at the reflection / transmission boundary surface 13 and travels in different directions, for example, interface reflection light 63a, interface reflection light 63b, and interface reflection light 63c. For this reason, the interface reflected light that interferes with the surface reflected light 62 is reduced, and interference fringes are not observed. .
  • the first decorative resin molded product 3 is irradiated with light typified by sunlight having a spectrum continuously in the visible light region, and when light from a fluorescent lamp having a maximum peak in the visible light region is irradiated Even so, the advantage that interference fringes do not occur can be obtained.
  • the content of the interference fringe preventing agent 6 in the anchor layer material is usually 2 to 10% by weight, preferably 2 to 5% by weight. If it is within this range, the incident light is sufficiently scattered and the transparency of the anchor layer 3 is not impaired.
  • interference fringe prevention agent 6 there are no particular restrictions on the material of the interference fringe prevention agent 6, but for example, interference fringe prevention comprising inorganic substances such as silica, alumina, calcium carbonate, and barium sulfate, and organic polymers such as acrylic resin, polyethylene, urethane resin, polycarbonate, and polyamide. Agents.
  • the average particle diameter of the interference fringe preventing agent 6 is usually 0.5 ⁇ m to 20 ⁇ m, preferably 0.5 ⁇ m to 10 ⁇ m.
  • the interface that causes light scattering is preferably from 0.1 ⁇ m to 5 ⁇ m in terms of root mean square roughness.
  • the interface that causes light scattering is preferably from 0.1 ⁇ m to 5 ⁇ m in terms of root mean square roughness.
  • the roughness of the interface is less than 0.1 ⁇ m in terms of root mean square roughness, incident light is not sufficiently scattered.
  • the roughness of the interface exceeds 5 ⁇ m in terms of root mean square roughness, the uneven shape of the metal thin film layer 26 becomes conspicuous, and the decorativeness of the decorative resin molded product is lost.
  • FIG. 8 is a schematic cross-sectional view of a layer containing an interference fringe inhibitor.
  • the anchor layer 23 is considered to be fixed to the layer 28 immediately below by a thin layer material 231 surrounding the surface of the interference fringe preventing agent 6 particles.
  • the thickness d of the anchor layer is expressed by the thickness of the layer material.
  • the boundary surface that causes light scattering may be a transmission / transmission boundary surface.
  • An example of the transmission / transmission interface is the interface between the peeling layer 22 and the anchor layer 23.
  • an interference fringe preventing agent may be contained in the material for forming the release layer 22 and the release layer may be formed by coating or printing.
  • the reflection / transmission boundary surface that is in direct contact with the metal thin film layer is a surface that causes light scattering. This is because the light reflected at the boundary surface formed by the metal thin film layer can be directly scattered, and as a result, the generation of interference fringes can be suppressed most effectively.
  • FIG. 2 is a cross-sectional explanatory view of the second transfer sheet 2 according to the present invention.
  • the second transfer sheet 2 has a release layer 22, a gloss layer 27 and an adhesive layer 24 sequentially laminated on one surface of a base sheet 21.
  • the release layer 22 is a layer that transmits light.
  • the release layer 22 forms a light transmission layer.
  • the gloss layer 27 is a light reflecting layer.
  • the boundary surface between the peeling layer 22 and the gloss layer 27 is a reflection / transmission boundary surface 13.
  • the two layers forming the reflection / transmission interface 13 are a peeling layer 22 and a gloss layer 27.
  • Interference fringe preventing agent 6 made of fine particles is contained in gloss layer 27, which is one of these layers.
  • the reflection / transmission interface 13 is a boundary that causes light scattering.
  • FIG. 4 is a cross-sectional explanatory view of the second decorative resin molded product 4.
  • the adhesive layer 24, the gloss layer 27, and the release layer 22 are sequentially laminated on one surface of the molded resin 31.
  • the gloss layer 27 is a light reflecting layer.
  • the release layer 22 is a layer that transmits light.
  • the release layer 22 forms a light transmission layer.
  • the second decorative resin molded product 4 is manufactured by transferring the second transfer sheet 2 to a molding resin, and each layer laminated is the same as the second transfer sheet 2.
  • the boundary surface between the release layer 22 and the gloss layer 27 is a reflection / transmission boundary surface 13.
  • the two layers forming the reflection / transmission interface 13 are a peeling layer 22 and a gloss layer 27.
  • Interference fringe preventing agent 6 made of fine particles is contained in gloss layer 27, which is one of these layers.
  • the reflection / transmission interface 13 is an interface that causes light scattering.
  • the material of the gloss layer 27 is polyvinyl resin, polyamide resin, polyacrylic resin, polyurethane resin, polyvinyl acetal resin, polyester urethane type.
  • the gloss layer is desired to have a metallic color, pearl pigments in which titanium oxide is coated on metal particles such as aluminum, titanium, bronze, or mica can be used.
  • the light reflectance of the laminated structure composed of the release layer 22 and the gloss 27 is 3% to 10%.
  • a laminated structure composed of a release layer 22 and a glossy layer 27 is formed on a base sheet, a transfer sheet is further formed with an adhesive layer, and a decorative resin molded product is produced using the transfer sheet. create. And the light reflectivity of the said decorative resin molded product is measured, and let this measured value be the light reflectivity of a laminated structure.
  • the incident direction of light is the same as described in the means for solving the problem. This is because a conventional decorative resin molded product including a laminated structure having a light reflectance in the above range produces interference fringes.
  • the material, average particle diameter, content and the like of the interference fringe preventing agent are the same as those described for the anchor layer of the first transfer sheet and the first decorative resin molded product.
  • a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used.
  • FIG. 7 is an explanatory diagram for explaining the surface state of the gloss layer.
  • FIG. 7A is an explanatory diagram of the gloss layer surface containing the interference fringe preventing agent
  • FIG. 7B is an explanatory diagram of the gloss layer surface not including the interference fringe preventing agent.
  • the pigment particles 271 are closely arranged on the surface of the conventional gloss layer 127.
  • An example of pigment particles is carbon black particles having a primary particle size of several tens of nanometers. It is considered that the closely aligned pigment particles reflect light to generate interface reflected light, which causes interference fringes.
  • the gloss layer 27 according to the present invention in the second transfer sheet and the second decorative resin molded product contains the interference fringe preventing agent 6.
  • the pigment particles 271 cannot be closely arranged because of the interference fringe preventing agent 6. For this reason, it is considered that light scattering occurs on the surface of the gloss layer 27.
  • the decorative resin molded product according to the present invention can be manufactured by a transfer method using a transfer sheet.
  • the decorative resin molded product according to the present invention may be manufactured by sequentially forming layers on the surface of the molded resin.
  • transfer methods two most commonly used forms will be described.
  • the first form is a method for producing a decorative resin-formed product by the simultaneous transfer molding method by injection molding using the aforementioned transfer sheet.
  • FIG. 5 is a process explanatory view of a method for producing a decorated resin molded product by a simultaneous molding transfer method using the first transfer sheet. The manufacturing process proceeds in the order of FIGS. 5 (a), (b), (c), (d), and (e). In addition, illustration of a metal mold
  • the transfer sheet 1 is fed into a molding die composed of an A die 41 and a B die 42.
  • the A mold 41 and the B mold 42 are clamped, the molten resin is injected and filled into the cavity 43, and the transfer sheet is formed on the surface of the molded resin at the same time as the resin is molded. 1 is adhered.
  • the mold is cooled or allowed to cool naturally to solidify the molten resin. This state is shown in (c).
  • the second form is a method for producing a decorated resin molded product by the transfer method using the transfer sheet described above.
  • the adhesive layer side of the transfer sheet is brought into contact with the surface of the resin molded product.
  • a transfer machine such as a roll transfer machine equipped with a heat-resistant rubber-like elastic body such as silicon rubber or an up-down transfer machine
  • heat and pressure are transferred from the base sheet side of the transfer sheet via the heat-resistant rubber-like elastic body.
  • the adhesive layer adheres to the surface of the transfer object, and other layers also transfer to the surface of the transfer object.
  • the transfer object may be transparent, translucent, or opaque. Further, the transfer object may be colored or not colored.
  • Example 1 A melamine resin is applied to the entire surface of 1 ⁇ m thickness on one surface of a PET film as a base sheet, a 1 ⁇ m-thick release layer is formed thereon, and silica particles having an average particle diameter of 2 ⁇ m are formed thereon by 10% by weight.
  • the contained anchor layer was 1 ⁇ m thick, an aluminum thin film layer, and an adhesive layer made of acrylic resin was formed in order by a gravure printing method to obtain a transfer sheet.
  • the thickness of the aluminum thin film layer was 10 nm.
  • a decorative resin molded product was manufactured by a simultaneous molding transfer method.
  • the obtained decorative resin molded product was irradiated with visible light from a three-wavelength fluorescent lamp, no interference fringes were observed.
  • ⁇ Comparative Example 1> A melamine resin is applied on the entire surface of a PET film, which is a base sheet, to a thickness of 1 ⁇ m, a 1 ⁇ m-thick release layer is formed thereon, an anchor layer is 1 ⁇ m, an aluminum thin film layer, an acrylic resin A transfer sheet was obtained by sequentially forming an adhesive layer of 3 ⁇ m in thickness by a gravure printing method. The thickness of the aluminum thin film layer was 10 nm.
  • a decorative resin molded product was manufactured by a simultaneous molding transfer method.
  • the light reflectance of the decorative resin molded product that is, the light reflectance of the laminated structure including the release layer, the anchor layer, and the aluminum thin film layer was 20%.
  • the obtained decorative resin molding was irradiated with visible light from a three-wavelength fluorescent lamp, interference fringes were observed on the surface.
  • Example 2 A melamine resin is applied to the entire surface of 1 ⁇ m on one surface of a PET film as a base sheet, a 1 ⁇ m-thick release layer is formed thereon, and 10% by weight of silica particles having an average particle diameter of 2 ⁇ m are contained thereon.
  • a transfer layer was obtained by sequentially forming a gloss layer made of acrylic resin with a thickness of 3 ⁇ m and an adhesive layer made of acrylic resin with a thickness of 3 ⁇ m by a gravure printing method.
  • a decorative resin molded product was obtained by using the obtained transfer sheet in a simultaneous molding transfer method.
  • the obtained decorative resin molded product was irradiated with visible light from the three-wavelength fluorescent lamp on the surface, no interference fringes were observed on the surface.
  • ⁇ Comparative example 2> A melamine resin is applied to the entire surface of 1 ⁇ m on one surface of a PET film as a base sheet, a 1 ⁇ m-thick release layer is formed thereon, and a glossy layer made of an acrylic resin is formed thereon with a thickness of 3 ⁇ m.
  • a transfer sheet was obtained by sequentially forming an adhesive layer of 3 ⁇ m in thickness by a gravure printing method.
  • a decorative resin molded product was manufactured by a simultaneous molding transfer method.
  • the light reflectance of the decorative resin molded product that is, the light reflectance of the laminated structure composed of the release layer and the gloss layer was 5%.
  • the obtained decorative resin molding was irradiated with visible light from a three-wavelength fluorescent lamp, interference fringes were observed on the surface.
  • the present invention can be suitably used in various molded products such as communication devices such as mobile phones, automobile exterior parts, information equipment inside automobiles, and home appliances.

Landscapes

  • Laminated Bodies (AREA)
  • Decoration By Transfer Pictures (AREA)

Abstract

La présente invention se rapporte à une résine moulée décorative sur laquelle sont superposées une ou plusieurs couches de transmission de lumière et une couche de réflexion de lumière qui est une couche métallique mince ou une couche brillante. La résine moulée ne peut pas comporter de franges d’interférence. Dans la résine moulée décorative, la frontière réflexion/transmission (13) qui est la frontière entre la couche de réflexion de lumière et les couches de transmission de lumière ou une frontière transmission/transmission qui est la frontière entre les couches de transmission de lumière joue le rôle de frontière où se produit une diffusion de lumière. Cette frontière de dispersion de lumière a été formée par l’incorporation d’un éliminateur de franges d’interférence comprenant de fines particules dans l’une ou l’autre des deux couches formant la frontière (dans la couche de transmission de lumière (23) dans le cas de la résine moulée décorative (3) illustrée sur la figure (6)). La présente invention se rapporte également à une feuille de transfert à utiliser pour la production de cette résine moulée décorative.
PCT/JP2009/002512 2008-06-11 2009-06-04 Feuille de transfert contenant un éliminateur de franges d’interférence et résine moulée décorative WO2009150800A1 (fr)

Applications Claiming Priority (2)

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JP2008152392A JP2011167844A (ja) 2008-06-11 2008-06-11 干渉縞防止剤を含有する転写シートとその加飾成形品
JP2008-152392 2008-06-11

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WO2009150800A1 true WO2009150800A1 (fr) 2009-12-17

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JP (1) JP2011167844A (fr)
TW (1) TW201004799A (fr)
WO (1) WO2009150800A1 (fr)

Cited By (5)

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JP2014019720A (ja) * 2012-07-12 2014-02-03 Dainippon Printing Co Ltd インキ組成物およびこれを用いた加飾シート
JP2014019719A (ja) * 2012-07-12 2014-02-03 Dainippon Printing Co Ltd インキ組成物およびこれを用いた加飾シート
JP2017065167A (ja) * 2015-09-30 2017-04-06 大日本印刷株式会社 加飾シート及び加飾樹脂成形品
CN111225850A (zh) * 2017-08-30 2020-06-02 本田技研工业株式会社 车辆用外板面板以及车辆用外板面板的制造方法
JP2020111061A (ja) * 2020-04-07 2020-07-27 大日本印刷株式会社 加飾シート及び加飾樹脂成形品

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JP2014218018A (ja) * 2013-05-09 2014-11-20 サン・トックス株式会社 転写加飾シート
JP6273954B2 (ja) * 2014-03-26 2018-02-07 大日本印刷株式会社 加飾シート
JP6866671B2 (ja) * 2017-02-13 2021-04-28 昭和電工マテリアルズ株式会社 成形品
JP6866670B2 (ja) * 2017-02-13 2021-04-28 昭和電工マテリアルズ株式会社 成形品
JP2018149715A (ja) * 2017-03-10 2018-09-27 テイ・エス テック株式会社 加飾フィルム
JP7054998B2 (ja) * 2017-09-11 2022-04-15 Ａｇｃコーテック株式会社 塗膜および塗膜付き基材
CN112916289A (zh) * 2021-01-25 2021-06-08 王瀚宇 人造彩虹装置

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JPH10250294A (ja) * 1997-03-17 1998-09-22 Dainippon Printing Co Ltd 転写シート及びそれを用いた化粧材の製造方法

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JPH10250294A (ja) * 1997-03-17 1998-09-22 Dainippon Printing Co Ltd 転写シート及びそれを用いた化粧材の製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014019720A (ja) * 2012-07-12 2014-02-03 Dainippon Printing Co Ltd インキ組成物およびこれを用いた加飾シート
JP2014019719A (ja) * 2012-07-12 2014-02-03 Dainippon Printing Co Ltd インキ組成物およびこれを用いた加飾シート
JP2017065167A (ja) * 2015-09-30 2017-04-06 大日本印刷株式会社 加飾シート及び加飾樹脂成形品
CN111225850A (zh) * 2017-08-30 2020-06-02 本田技研工业株式会社 车辆用外板面板以及车辆用外板面板的制造方法
US11597449B2 (en) 2017-08-30 2023-03-07 Honda Motor Co., Ltd. Vehicle outer plate panel and method for manufacturing vehicle outer plate panel
JP2020111061A (ja) * 2020-04-07 2020-07-27 大日本印刷株式会社 加飾シート及び加飾樹脂成形品
JP7070597B2 (ja) 2020-04-07 2022-05-18 大日本印刷株式会社 加飾シート及び加飾樹脂成形品

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JP2011167844A (ja) 2011-09-01

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