JP2010006031A - Decorative molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative molding 100 which has high adhesion between a resin molding 3 and an adhesive layer 2 formed in a decorative sheet 110 and is high in durability to be used for a long time. <P>SOLUTION: In the decorative molding 100 in which at least a pattern layer 1 and the adhesive layer 2 are formed on the resin molding 3, the resin molding 3 contains cellulose microfibrils 4 in order to prevent the occurrence of, for example, delamination between the pattern layer 1 and the adhesive layer 2 even when the decorative molding 100 is used for a long time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a decorative molded product used in electronic equipment such as home appliances, automobile products, and mobile phones, and the surface thereof is formed by a simultaneous molding transfer method, a simultaneous molding decoration method, a transfer method, and a decoration method. The present invention relates to a decorated molded product.

  Conventionally, there are a decoration method and a transfer method as a method for decorating the surface of home appliances, cosmetic containers, miscellaneous goods and the like. The decoration method is a method in which a decoration sheet made of a release layer, a pattern layer, an adhesive layer, or the like is used on a base sheet, and the decoration sheet is decorated by adhering the decoration sheet to an object to be transferred. The transfer method uses a transfer sheet composed of a release layer, a design layer, an adhesive layer, etc. on a substrate sheet having releasability. In this method, the material to be transferred is decorated by peeling. In addition, when the object to be decorated is a resin molded product, there are a simultaneous molding decoration method and a simultaneous molding transfer method as a more rational method for the decoration method and the transfer method. The simultaneous molding decoration method is a method in which a decorative sheet is sandwiched in a molding die, a resin is injected and filled in the die, and cooled to obtain a resin molded product. It is a way to decorate. The simultaneous molding 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.

Japanese Patent Laid-Open No. 06-135197

  However, the decorative molded product created by the above method is not the one in which the surface of the resin molded product is decorated directly like spray coating, but the decorative sheet and the resin molded product in which the pattern desired to be decorated is formed on the design layer The pattern layer is formed on the resin molded product via an adhesive layer. Therefore, if the adhesiveness between the adhesive layer and the resin molded product is poor, the adhesive layer is displaced from a predetermined position of the resin molded product or peeled off while the decorative molded product is used for a long time. As a result, the pattern layer formed on the adhesive layer also has a problem that it is displaced or peeled off from the resin molded product.

  Therefore, the present invention eliminates the above problems, has high adhesion between the resin molded product and the adhesive layer formed in the decorative sheet, and has high durability that can withstand long-term use. An object is to provide a decorative molded product.

  The decorative molded product of the present invention is configured as follows in order to achieve the above object.

  That is, the decorative molded product of the present invention is configured such that the resin molded product contains cellulose microfibrils in the decorative molded product in which the design layer and the adhesive layer are formed at least on the resin molded product.

  In addition, as a second aspect of the present invention, the decorative molded product of the present invention is configured such that cellulose microfibrils are contained in an amount of 20 to 80% by weight in the resin molded product.

  As a third aspect of the present invention, the decorative molded product of the present invention is configured such that the resin molded product is transparent.

  The decorative molded product of the present invention is a decorative molded product in which at least an adhesive layer and a design layer are formed on the resin molded product, and the resin molded product is formed so as to contain cellulose microfibrils. The decorative molded product has high adhesion between the resin molded product and the adhesive layer formed in the decorative sheet, and is less likely to be displaced or peeled between the adhesive layer and the resin molded product even when used for a long time.

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

  FIG. 1 is a cross-sectional view of a decorative molded product 100 of the present invention. In the figure, 1 is a design layer, 2 is an adhesive layer, 3 is a resin molded product, and 4 is cellulose microfibril. In addition, the same code | symbol is attached | subjected about the same component in each figure.

  The decorative molded product 100 of the present invention is such that the resin molded product 3 contains the cellulose microfibril 4 in the decorative molded product 100 in which the design layer 1 and the adhesive layer 2 are formed at least on the resin molded product 3. (See FIG. 1).

  The design layer 1 is a layer for decorating and decorating a molded product. As a material of the pattern layer 1, a resin such as a polyvinyl resin, a polyamide resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, and an alkyd resin is used as a binder. Colored inks containing various color pigments or dyes as colorants may be used. In the case of forming a metal color, a pearl pigment in which titanium oxide is coated on metal particles such as aluminum, titanium, bronze, or mica can be used. As a method for forming the pattern layer 1, a normal printing method such as an offset printing method, a gravure printing method, or a screen 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 pattern layer 1 may be made of a metal thin film or a combination of a printed film and a metal thin film. The metal thin film is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like. 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. As a forming method when a metal thin film is formed in a part, a celite method and a paster method can be mentioned.

  In the celite method, a water-soluble resin layer is partially formed before forming a metal thin film, and after vapor deposition, the water-soluble resin layer and unnecessary metal thin film portions formed thereon are removed by washing with water. In this method, a metal thin film is formed. Here, examples of the material for the water-soluble resin layer include inks containing a water-soluble resin typified by polyvinyl alcohol, starch, algide, epoxy, polyurethane and the like as a binder. Examples of the forming method include a gravure printing method, a flexographic printing method, and a screen printing method.

  The paster method is a method in which after forming a metal thin film, an alkali-resistant resin layer is partially formed on the metal thin film, and the metal thin film is partially formed by subsequent alkali cleaning. Here, the material of the alkali-resistant resin layer includes vinyl chloride-vinyl acetate copolymer. Examples of the method for forming the alkali-resistant resin layer include coating methods such as gravure coating, roll coating, and comma coating, printing methods such as gravure printing, and screen printing.

  The adhesive layer 2 is a layer formed on the design layer 1 and adheres a resin molded product 3 described later and each of the above layers. Further, the adhesive layer 2 is formed on a portion to be bonded. That is, when the part to be bonded is the entire surface, the adhesive layer 2 is formed on the entire surface. As the adhesive layer 2, a heat-sensitive or pressure-sensitive resin suitable for the material to be decorated is used as appropriate. For example, when the material to be decorated is an acrylic resin, an acrylic resin may be used. If the material to be decorated 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. Furthermore, when the material to be decorated 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 3 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.

  The resin molded product 3 is decorated with the above-described pattern layer and the like. The resin molded product 3 may be transparent, translucent, or opaque, but is particularly preferably transparent. That is, when the resin molded product 3 is transparent, the transparent cellulose microfibril 4 described later can be mixed with the resin molded product 3 to produce a transparent and strong resin molded product 3. This is because the decorative molded product made of the resin molded product 3 is used as a decorative molded product having a transparent portion in a display unit of an electronic device or the like and becomes useful. Further, the resin molded product 3 may be colored or may not be colored. Examples of the resin molded product 3 include general-purpose resins such as polystyrene resins, polyolefin resins, ABS resins, AS resins, and AN resins. 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. Furthermore, composite resins to which reinforcing materials such as glass fibers and inorganic fillers are added can also be used.

  Cellulose microfibril 4 is contained and used in resin molded product 3. When the cellulose microfibril 4 is contained and used in the resin molded product 3, the cellulose microfibril 4 forms a three-dimensional network structure by the entanglement of the microfibers. Therefore, the resin molded product 3 containing the cellulose microfibril 4 is made of carbon fiber or glass. It has the same mechanical strength and bending properties as those containing fibers. Furthermore, since the resin molded product 3 contains the cellulose microfibril 4, the cellulose microfibril 4 appears on the surface thereof, and the surface area of the resin molded product 3 is increased, so that the adhesive area between the adhesive layer 2 and the resin molded product 3 is increased. As a result, the adhesiveness between the adhesive layer 2 and the resin molded product 3 is excellent (see FIG. 1). In addition, the wavy line described at the interface between the adhesive layer 2 and the resin molded product 3 in FIG. 1 indicates that the surface area of the resin molded product 3 is increased because the resin molded product 3 contains the cellulose microfibrils 4. In each of the following drawings, the wavy line indicates that the surface area of the resin molded product 3 is increased by containing the cellulose microfibrils 4. Here, the cellulose microfibril 4 is a microfibrillated cellulose fiber. Microfibrillation is a phenomenon in which microfibrils (microfibers) in fibers appear on the surface due to friction and become fuzzy. Specifically, when a strong mechanical shearing force is applied to the cellulose fiber to form a microfibril, the cellulose fiber is torn into tens of thousands and subdivided into a fiber diameter of 0.1 to 0.01 μm. The The raw material of the cellulose microfibril 4 is not particularly limited in the type of cellulose fiber, and may be a fiber derived from microorganisms or animals such as bacteria, squirt sac, and the like, in addition to plants such as trees.

  The amount of cellulose microfibril 4 to be contained in the resin molded product 3 is preferably 1% to 99% by weight, more preferably 20% to 80% by weight, when the cellulose microfibril 4 is in a dry state. When the content of the cellulose microfibril 4 is 20% by weight or less, the resin molded product 3 and the surface roughness are not sufficient, so that sufficient adhesion between the resin molded product 3 and the adhesive layer 2 cannot be obtained. While there is a problem, if it is 80% by weight or more, the transparency of the resin molded product 3 is lowered, and when the transparent resin molded product 3 is used, the transparency of the decorative molded product 100 is lowered. This is because problems arise.

  In addition to the above, the hard coat layer 5 may be formed on the surface of the decorative molded product 100 (see FIG. 2). The hard coat layer 5 is a layer for protecting the design decorated on the design layer 1 and is formed on the outermost surface of the resin molded product. Examples of the material of the hard coat layer 5 include ionizing radiation curable resins such as cyanoacrylate and urethane acrylate, and thermosetting resins such as acrylic and urethane, but are not particularly limited. Further, the hard coat layer 5 may contain cellulose microfibrils 4 (see FIG. 3). In this case, unlike the case where the hard coat layer 5 contains carbon particles or metal particles, the cellulose microfibril 4 itself is transparent, so that the mechanical properties of the hard coat layer 5 are maintained while maintaining a certain degree of transparency of the hard coat layer 5. The mechanical strength and bending strength can be improved.

  As content of the cellulose microfibril 4 contained in the hard-coat layer 5, it is preferable that cellulose microfibril 4 is 1 to 99 weight% in a dry state, More preferably, it is 20 to 80 weight%. is there. This is because when the content of cellulose microfibrils 4 in a dry state exceeds 80% by weight, the permeability of the hard coat layer 5 is reduced by the cellulose microfibrils 4 contained in the hard coat layer 5, and the hard coat layer On the contrary, when the content of the cellulose microfibril 4 in the dry state is less than 20% by weight, the problem that the layer 5 interferes with the decorativeness of the pattern layer 1 formed thereunder occurs. This is because the surface roughness of the hard coat layer 5 on the side in contact with the pattern layer 1 becomes small, and the adhesion between the hard coat layer 5 and the pattern layer 1 becomes worse.

  The surface roughness of the hard coat layer 5 on the side in contact with the pattern layer 1 is preferably 0.01 μm to 0.70 μm, more preferably 0.01 μm to 0.50 μm, in terms of arithmetic average roughness (Ra). . In this range, the hard coat layer 5 and the design layer 1 can improve the adhesion between the design layer 1 and the hard coat layer 5 while maintaining the decorativeness of the design layer 1. This is because when the surface roughness exceeds 0.50 μm, the design layer 1 formed on the hard coat layer 5 is damaged, and the shape of the design applied to the design layer 1 is deformed. On the contrary, when the surface roughness is less than 0.01 μm, the surface area of the hard coat layer 5 on the side in contact with the design layer 1 is reduced, so that the adhesion area between the hard coat layer 5 and the design layer 1 is reduced. It is because the problem that the adhesiveness of the hard-coat layer 5 and the pattern layer 1 worsens arises.

  Moreover, you may form the protective sheet 6 instead of the hard-coat layer 5 as needed. The protective sheet 6 is a layer that prevents the design decorated on the design layer 1 and the resin molded product 3 from being scratched, and is formed on the outermost surface of the decorative molded product 100 (see FIG. 4). As the protective sheet 6, a thermoplastic sheet such as polycarbonate, polycarbonate-polyethylene hybrid resin, or acrylic resin may be used.

  Moreover, you may form an anchor layer between the hard-coat layer 5 or the protection sheet 6, and the design layer 2 as needed, or between the design layer 2 and the contact bonding layer 3 (not shown). An anchor layer is a layer which comprises a part of decorating sheet 110, and is a layer which improves the interlayer adhesiveness of said each layer. As the material of the 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 resin, vinyl resin A copolymer resin or the like may be used. Examples of the method for forming the anchor 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.

  Next, the manufacturing method of the decorative molded product 100 of the present invention will be described. Examples of the method for producing the decorative molded product 100 of the present invention include a simultaneous molding method, a simultaneous molding transfer method, a decoration method, and a transfer method. After explaining the method of creating the decorative molded product 100 by applying the decoration method and the decorative method, the method of creating the decorative molded product 100 by applying the simultaneous molding method and the transfer method to the transfer sheet 120 is explained. To do. FIG. 5 is a flowchart according to the manufacturing process when the decorative sheet 110 is created using the simultaneous molding decoration method. This will be described below with reference to the drawings.

  ST01: First, a predetermined amount of cellulose microfibril 4 and resin material 7 are prepared. As the resin material 7, a material having a large surface area such as powder or granular material is desirable. The mixing ratio of the cellulose microfibril 4 to the resin material 7 is preferably 1% by weight or more. As a kind of the resin material 7, the same material as the resin molded product 3 described above may be used.

  ST02: The resin material 7 and the cellulose microfibril 4 are put into a mixer and mixed while maintaining the temperature at which the entire surface of the resin material 7 is softened. Thereby, the mixture 8 which the countless cellulose microfibril 4 adhered to the surface of the resin material 7 can be obtained (refer FIG. 6). The temperature at which the entire surface of the resin material 7 is softened is 160 to 170 ° C. and the heating temperature is 140 to 160 ° C. if the resin material 7 is polypropylene. If the resin material 7 is PET (polyethylene terephthalate), the melting point temperature is preferably 253 to 265 ° C, and the heating temperature is preferably 190 to 250 ° C. Originally, the cellulose microfibrils 4 and the resin material 7 having different specific gravities cannot be uniformly mixed, but only the surface portion of the resin material 7 is melted and the cellulose microfibrils 4 are fixed to the surface portion to thereby fix the resin material 7. And cellulose microfibril 4 can be mixed uniformly.

  ST03: The decorative sheet 110 is fed into the injection mold 11 composed of the movable mold 9 and the fixed mold 10 so that the protective sheet 6 is in contact with the fixed mold 10 (see FIG. 7A). The decorative sheet 110 includes the above-described symbol layer 1, the adhesive layer 2, the protective sheet 6, and an anchor layer as necessary. At this time, the single sheet of decorative sheet 110 may be fed one by one, or a necessary portion of the long decorative sheet 110 may be intermittently fed. When the long decorative sheet 110 is used, it is preferable to use a feeding device having a positioning mechanism so that the register of the design layer 1 of the decorative sheet 110 and the injection mold 11 coincide. Further, when the decorative sheet 110 is intermittently fed, if the decorative sheet 110 is fixed by the movable mold 9 and the fixed mold 10 after the position of the decorative sheet 110 is detected by a sensor, the same position is always obtained. It is convenient because the decorative sheet 110 can be fixed and the positional shift of the pattern layer 1 does not occur.

  ST04: After the injection mold 11 is closed, the mixture 8 is injected and filled into the mold from the gate provided on the movable mold 9, and the decorative sheet 110 is bonded to the surface at the same time as the mixture 8 is molded. Then, the mixture 8 and the decorative sheet 110 are integrated (see FIG. 7B).

  ST05: After the injected resin material 7 is molded and cooled, the movable mold 9 and the fixed mold 10 of the injection mold 11 are opened, and the decorative sheet 110 and the molded resin material 7 are integrated. The decorative molded product 100 is taken out. Thereby, the decorative molded product 100 in which the resin molded product 3 contains 1% by weight or more of the cellulose microfibrils 4 can be obtained (see FIG. 7C).

Next, a method for decorating the surface of the transfer object using the decoration method will be described. First, the adhesive layer 2 side of the decorative sheet 110 is brought into close contact with the surface of the transfer object. As the material of the material to be transferred, the same material as the resin molded product 3 described above can be used, and a composite resin to which cellulose microfibril 4 is added as a reinforcing material can also be used as the material to be transferred. Next, using a transfer machine such as a roll transfer machine or an up-down transfer machine equipped with a heat-resistant rubber-like elastic body 14 such as silicon rubber, the temperature is set to about 80 to 260 ° C. and the pressure is set to about 50 to 200 kg / m ^2. Heat or / and pressure is applied from the base sheet 12 side of the decorative sheet 110 through the heat-resistant rubber-like elastic body 14. By doing in this way, the contact bonding layer 2 adhere | attaches on the to-be-transferred material surface, and the decorative molded product 100 is obtained (refer FIG. 8).

  Next, the manufacturing method at the time of producing the decorative molded product 100 using the transfer sheet 120 is demonstrated. First, a manufacturing method for producing the decorative molded product 100 using the simultaneous molding transfer method will be described.

  FIG. 9 is a flowchart according to the manufacturing process when the decorative molded product 100 of the present invention is created using the simultaneous molding transfer method. This will be described below with reference to the drawings. Since ST11 and ST12 are the same as ST01 and ST02 when the decorative sheet 110 is used, the description thereof is omitted.

  ST13: The transfer sheet 120 is fed into the injection mold 11 including the movable mold 9 and the fixed mold 10 so that the base sheet 12 is in contact with the fixed mold 10 (see FIG. 10A). The transfer sheet 120 includes the pattern layer 1, the adhesive layer 2, the base sheet 12, or the hard coat layer 5 and / or the anchor layer as necessary. As the base sheet 12, resin sheets such as polypropylene resin, polyethylene resin, polyamide resin, polyester resin, acrylic resin, polyvinyl chloride resin, metal foil such as aluminum foil and copper foil, glassine paper, coat A base sheet 12 of a normal transfer sheet 120 such as paper, cellophane, or a cellulosic sheet, or a composite of each of the above sheets can be used. Moreover, when the surface of the base sheet 12 has fine irregularities, the irregularities are copied on the transfer layer, and surface shapes such as matte and hairline can be expressed. In order to improve the peelability of the base sheet 12, a release layer may be provided between the base sheet 12 and the release layer. The release layer is a layer that is released from the transfer layer together with the base sheet 12 when the base sheet 12 is peeled after transfer or after simultaneous molding transfer. As the material of the release layer, melamine resin, silicone resin, fluorine resin, cellulose derivative, urea resin, polyolefin resin, paraffin resin, and composites thereof can be used. Examples of the method for forming the release layer include coating methods such as a roll coating method and a spray coating method, and printing methods such as a gravure printing method and a screen printing method.

  At this time, the sheet-like transfer sheets 120 may be fed one by one, or necessary portions of the long decorative sheet 110 may be intermittently fed. When the long decorative sheet 110 is used, it is preferable to use a feeding device having a positioning mechanism so that the register of the design layer 1 of the decorative sheet 110 and the injection mold 11 coincide. Further, when the decorative sheet 110 is intermittently fed, if the decorative sheet 110 is fixed by the movable mold 9 and the fixed mold 10 after the position of the decorative sheet 110 is detected by a sensor, the same position is always obtained. It is convenient because the decorative sheet 110 can be fixed and the positional shift of the pattern layer 1 does not occur.

  ST14: After closing the injection mold 11, the mixture 8 is injected and filled into the mold from the gate provided in the movable mold 9, and the decorative sheet 110 is adhered to the surface at the same time as the mixture 8 is molded. Then, the injected mixture 8 and the transfer sheet 120 are integrated (see FIG. 10B). As the resin material 7 used for the mixture 8, the same material as that of the resin molded product 3 described above may be used. This process is a process in which the transfer sheet 120 and the resin material 7 are integrated by forcibly pressing the decorative sheet 110 or the transfer sheet 120 against the injection mold 11 with the injected mixture 8, so that the integration is performed. At this time, a large stress is generated on the transfer sheet 120. As a result, if the adhesion between the design layer 1 and the hard coat layer 5 constituting the transfer sheet 120 is poor, delamination occurs between these layers, and the bending strength of the hard coat layer 5 is sufficient. Otherwise, there is a problem that the hard coat layer 5 is cracked. However, since the surface area of the hard coat layer 5 is increased by using the transfer sheet 120 containing the cellulose microfibril 4 in the hard coat layer 5 as described above, the pattern layer 3 and the hard coat layer 5 are good. Can be adhered to. Further, since the cellulose microfibrils 4 are contained in the hard coat layer 5, the bending strength of the hard coat layer 5 is increased. That is, even if a large force is applied to the hard coat layer 5 in this step, the pattern layer 3 and the hard coat layer 5 are hardly separated from each other, and even if the shape of the hard coat layer 5 is greatly deformed, the hard coat layer 5 Cracks are less likely to occur.

  ST15: After the injected mixture 8 is molded and cooled, the movable mold 9 and the fixed mold 10 of the injection mold 11 are opened, and the integrally molded product 13 integrated with the transfer sheet 120 is molded at the same time. Together with taking out (see FIG. 10C), or after taking out, the base sheet 12 portion of the transfer sheet 120 is peeled off from the integrally molded product 13 (see FIG. 10D) to obtain a decorative molded product 100 (see FIG. 10). 10 (e)). Thereby, the decorative molded product 100 in which the resin molded product 3 contains 1% by weight or more of the cellulosic microfibrils 5 can be obtained.

  ST16: Here, when the transfer sheet 120 having the hard coat layer 5 is used, the hard coat layer 5 transferred to the integrally molded product 13 is completely crosslinked and cured by irradiating the integrally molded product 13 with active energy rays. be able to. In addition, you may perform the process of irradiating an active energy ray before the process of peeling the base sheet 12. FIG. Examples of active energy rays include electron beams, ultraviolet rays, and γ rays. Irradiation conditions are determined according to the active energy ray-curable resin composition.

  Next, a method for decorating the surface of the transfer object using the transfer method using the transfer sheet 120 will be described. First, the adhesive layer 2 side of the transfer sheet 120 is brought into close contact with the surface of the transfer object (see FIG. 11). As a material of the material to be transferred, the same material as that constituting the resin molded product 3 can be used, and a composite resin to which cellulose microfibril 4 is added can also be used as the material to be transferred.

Next, using a transfer machine such as a roll transfer machine or an up-down transfer machine equipped with a heat-resistant rubber-like elastic body 14 such as silicon rubber, the temperature is set to about 80 to 260 ° C. and the pressure is set to about 50 to 200 kg / m ^2. Heat or / and pressure is applied from the base sheet 12 side of the transfer sheet 120 through the heat-resistant rubber-like elastic body 14. By doing in this way, the contact bonding layer 2 adhere | attaches on the to-be-transferred material surface (refer Fig.11 (a)).

  In the above method, the hard coat layer 5 and the resin molded product 3 are integrated by using the heat-resistant rubber-like elastic body 14 and forcibly pressing the transfer sheet 120 against the surface of the transfer object by applying a certain amount of heat and pressure. When integrated, a large stress is generated on the transfer sheet 120. As a result, the transfer sheet 120 using the hard coat layer 5 has a problem that delamination occurs between the hard coat layer 5 and the pattern layer 1 in this step and a problem that a crack occurs in the hard coat layer 13. However, the transfer sheet 120 of the present invention contains the cellulose microfibrils 4 in the hard coat layer 5 that is a constituent element thereof, so that the hard coat layer 5 and the design layer 3 adhere well and the hard coat layer 5 is hard. Since the bending strength of the coat layer 5 is large, in this step, the hard coat layer 5 and the pattern layer 3 are difficult to delaminate, and the hard coat layer 5 is not easily cracked even during transfer. It has become.

  Finally, when the base sheet 12 is peeled off after cooling, peeling occurs at the boundary surface between the base sheet 12 and the release layer 2 (see FIG. 11B), and the decorative molded product 100 can be obtained (FIG. 11 ( c)). Further, when the transfer sheet 120 constitutes the hard coat layer 5, the release layer 2 transferred to the resin molded product 3 is completely crosslinked and cured by irradiating active energy rays. In addition, you may perform the process of irradiating an active energy ray before the process of peeling the base sheet 12. FIG. Examples of active energy rays include electron beams, ultraviolet rays, and γ rays. Irradiation conditions are determined according to the active energy ray-curable resin composition.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used in various molded products such as communication devices such as mobile phones, automobile exterior parts, automobile internal information devices, and home appliances, and is industrially useful.

It is sectional drawing which shows one Example of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the decorative molded product which concerns on this invention. It is a flowchart which shows one Example of the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the mixture used for the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the mixture used for the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the manufacturing method of the decorative molded product which concerns on this invention. It is sectional drawing which shows one Example of the manufacturing method of the decorative molded product which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Design layer 2 Adhesive layer 3 Resin molding 4 Cellulose microfibril 5 Hard coat layer 6 Protective sheet 7 Resin material 8 Mixture 9 Movable mold 10 Fixed mold 11 Injection mold 12 Base sheet 13 Integrated molded article 14 Heat resistant rubber-like elasticity Body 100 Decorative molded product 110 Decorative sheet 120 Transfer sheet

Claims (3)

A decorative molded product in which a design layer and an adhesive layer are formed at least on a resin molded product, wherein the resin molded product contains cellulose microfibrils. The decorative molded product according to claim 1, wherein the cellulose microfibril is contained in an amount of 20 to 80% by weight in the resin molded product. The decorative molded product according to claim 1, wherein the resin molded product is transparent.

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