JP2020028981A - Decoration film and method for producing the same - Google Patents

Abstract

To provide a decoration film excellent in design.SOLUTION: A decoration film has a substrate S, wherein: a plurality of metal points M arranged in a halftone dot are formed on one surface of the substrate S; a space exists among adjacent metal points M, the space forming a metal film having semi-transparency. An interval among the adjacent metal points M is 0.1 mm or more. The substrate S is a transparent plate. A metal of the metal plate M is aluminum. The metal plate M constitutes hologram.SELECTED DRAWING: Figure 1

Description

  An embodiment of the present invention relates to a decorative film used for decoration of a resin molded product or the like, and a method for manufacturing the same.

  BACKGROUND ART Conventionally, surface decoration of a resin molded product has been performed using a decorative film having a metal layer on one surface of a base material. Such surface decoration with a decorative film is also used in the exterior and interior of motorcycles and automobiles. The metal layer of the decorative film is a film formed of a metal such as aluminum, chromium, copper, nickel, indium, tin, and silicon oxide. By decorating the surface of a resin molded product using a decorative film having a metal layer, the resin molded product can be given a metallic appearance having a desired texture such as gloss or mat.

  The decorative film is integrally formed with a resin molded product in a mold by film insert molding or in-mold molding. Therefore, heating and pressurization are performed also on the decorative film, and the resin molded product is formed into a shape along the mold including the decorative film.

JP 2014-156008 A

  As a conventional decorative film, a film obtained by vapor-depositing aluminum, chromium, or the like on a base material is generally used. However, since aluminum and chromium have low stretchability, there is a possibility that cracks may occur in the vapor deposited layer after integral molding. Therefore, a decorative film having a highly stretchable tin or indium metal layer may be used. However, tin and indium have lower luminance than aluminum and may not be able to obtain a desired appearance.

  The present invention has been proposed to solve the above problems. An object of the present invention is to provide a decorative film having excellent design properties.

The decorative film according to the embodiment of the present invention has the following configuration.
(1) The substrate has a substrate, and a plurality of metal points arranged in a halftone dot pattern are formed on one surface of the substrate, and there is a space between adjacent metal points, and the space provides translucency. Is formed.

(2) The distance between adjacent metal points may be 0.1 mm or more.
(3) The substrate may be a transparent substrate.
(4) The metal at the metal point may be aluminum.
(5) The metal point may be a hologram.
(6) The substrate may be a resin having thermoplasticity.

The method for manufacturing a decorative film according to the embodiment of the present invention includes the following steps.
(A) a mounting step of mounting a metal film on a substrate;
(B) a hot stamping step of heating and pressing the substrate on which the metal film is mounted using a plate having a plurality of projections arranged in a halftone dot;
(C) There is a space between the top surfaces of the plurality of projections, and the space forms a translucent metal film.

In addition, a method for manufacturing a decorative film according to another embodiment of the present invention includes the following steps.
(A) a printing step of printing a plurality of dots arranged in a halftone dot pattern on a substrate with an ultraviolet curable ink;
(B) a pressure bonding step of pressing a metal film on a substrate on which the ultraviolet curable ink is printed,
(C) an ultraviolet irradiation step of irradiating the substrate on which the metal film is pressed with ultraviolet light,
(D) There is a space between the plurality of points, and the space forms a metal film having translucency.

In addition, a method for manufacturing a decorative film according to another embodiment of the present invention includes the following steps.
(A) a deposition step of depositing a metal film on a substrate;
(B) a printing step of printing a plurality of dots arranged in a halftone dot with an alkali-resistant ink on the metal film deposited on the substrate;
(C) immersing the substrate on which the alkali-resistant ink is printed in an alkaline solution,
(D) There is a space between the plurality of points, and the space forms a metal film having translucency.

In addition, a method for manufacturing a decorative film according to another embodiment of the present invention includes the following steps.
(A) a printing step of printing an aqueous ink on the substrate so as to leave a plurality of dots arranged in a halftone dot;
(B) a deposition step of depositing a metal film on the substrate on which the aqueous ink is printed,
(C) immersing the substrate on which the metal film is deposited in water,
(D) There is a space between the plurality of points, and the space forms a metal film having translucency.

(E) The space between the spaces may be 0.1 mm or more.

  ADVANTAGE OF THE INVENTION According to this invention, the crack of a metal layer can be prevented and the decorative film excellent in the design property can be provided.

It is a photograph of the decoration film concerning a 1st embodiment of the present invention, (a) is a perspective view and (b) is a partial enlarged view. It is a figure showing an arrangement pattern of a metal point of a decorative film concerning a 1st embodiment of the present invention. It is a figure showing an arrangement pattern of a metal point of a decorative film concerning a 1st embodiment of the present invention. It is a figure for explaining the manufacturing method of the decorative film concerning a 1st embodiment of the present invention. It is a figure for explaining other manufacturing methods of the decorative film concerning a 1st embodiment of the present invention. It is a figure for explaining other manufacturing methods of the decorative film concerning a 1st embodiment of the present invention. It is a figure for explaining other manufacturing methods of the decorative film concerning a 1st embodiment of the present invention.

[1. Constitution]
Hereinafter, the decorative film F according to the embodiment of the present invention will be described with reference to the drawings. The decorative film F has a substrate S and a plurality of metal points M formed on the substrate S. The plurality of metal points M are arranged on one surface of the substrate S in a halftone dot shape. The halftone dot means that the metal points M are arranged so as to be regularly arranged. Further, in the decorative film F, there is a space between adjacent metal points M, and a metal film having translucency is formed by this space. The interval between adjacent metal points M is preferably 0.1 mm or more.

  The form in which the metal points M having the same shape and the same size are arranged at regular intervals includes the form in which the metal points M are arranged regularly. In addition, the rule is also applied to the case where the metal points M are arranged according to a predetermined rule, for example, when the large and small metal points M are alternately arranged, or when the size of the metal points M gradually decreases in each row. Included. Also, the case where the metal points M are arranged with regularly different intervals between the metal points M is included in a mode in which the metal points M are regularly arranged.

  1A and 1B are photographs showing an example of the decorative film F of the present embodiment. FIG. 1A is a photograph taken by placing the decorative film F on a blank sheet printed with “SAMPLE”. FIG. 1B is an enlarged photograph taken by placing the decorative film F on black paper. In the decorative film F of FIG. 1, the metal points of the hologram are formed as the metal points M.

  The substrate S is a film-shaped substrate. It is preferable to use a transparent substrate as the substrate S. The substrate S is made of a vinyl polymer such as acrylic resin, urethane resin, polycarbonate (PC), polyvinyl alcohol (PVA), polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), and polyvinyl chloride (PVC). It can be made into a film formed. Alternatively, a linear polymer such as polyester or polyamide, a fluororesin, an ABS resin, a COP resin, or the like may be formed into a film and used. The substrate S is a film formed using at least one of these materials. The substrate S may be a single-layer film, or may be composed of a plurality of layers formed using a plurality of materials.

  The substrate S can be a transparent substrate having transparency to visible light. However, it is not necessary to have a uniform transmittance for all visible light wavelengths, and predetermined visible light may be absorbed. That is, a colored transparent film may be used as the substrate S. The term “transparent” refers to a degree of transparency such that, when the substrate S is placed on paper on which characters or the like are written, characters written on the paper can be seen through. Note that the substrate S may be an opaque substrate. For example, a mode in which a plurality of metal points M arranged in a halftone dot pattern are formed on one surface of a colored substrate having low transparency is also included.

  The decorative film F can be manufactured by a plurality of manufacturing methods. When the manufacturing method includes a heating step, it is preferable to use a film having heat resistance. When the decorative film F is integrally formed with a resin molded product by using film insert molding or in-mold molding, the substrate S is a thermoplastic film.

  Further, patterns, characters, and the like may be printed on the substrate S in advance using ink or the like. The thickness of the substrate S is not particularly limited, but is preferably 10 to 500 μm. When the decorative film F is integrally formed with a resin molded product by using film insert molding or in-mold molding, the thickness of the substrate S is preferably set to 100 to 500 μm in consideration of workability.

  The metal point M is a metal film formed on one surface of the substrate S. Examples of the metal included in the metal point M include aluminum, chromium, copper, nickel, indium, tin, and silicon oxide. A hologram may be formed as the metal point M. The thickness of the metal point M is 100 to 600 °. As the thickness of the metal point M increases, the texture of the metal can be reproduced.

  2 (a) to 2 (c) and FIGS. 3 (a) and 3 (b) are explanatory diagrams showing arrangement patterns of metal points M arranged in a halftone dot shape. FIG. 2 is intended to explain only the arrangement pattern of the metal points M. Therefore, the illustration of the substrate S is omitted, and only the minimum metal points M necessary for describing the arrangement pattern are shown. 2A to 2C show examples of arrangement patterns of the decorative film F manufactured by a hot stamping method described later. FIGS. 3A and 3B show examples of arrangement patterns of a decorative film F manufactured by a cold stamping method described later.

  The metal points M are arranged in a halftone dot pattern on one surface of the substrate S. In the present embodiment, the halftone dot shape means that the shape and size of the metal points M are the same for all of the plurality of metal points M formed on the substrate S, and the intervals between the metal points M are equal. An example in which the components are arranged regularly will be described. 2A and 2B, the plurality of metal points M may be arranged regularly so as to form a grid-like space. Further, as shown in the right-hand diagrams of FIGS. 2A and 2B, a plurality of metal points M are provided in other rows so as to face an interval formed by two adjacent metal points M. , May be arranged regularly so that a plurality of T-shaped intervals are formed.

  In addition, as shown in FIG. 2C, in order to arrange the triangular metal points M in a halftone dot shape, one side of another metal point M is arranged so as to face the side of the metal point M, and is arranged on the same row. May be arranged at the metal point M. Then, as shown in the diagram on the left side of FIG. 2 (c), the direction of the metal points M for each column is changed so that the metal points M of the triangles in a certain row become the target of the metal points M in the other rows. They may be inverted and arranged alternately. Alternatively, as shown in the right-hand diagram of FIG. 2C, the metal points M may be arranged in the same direction in all the columns.

  Examples of the shape of the metal point M include a circle, a polygon such as a rectangle and a triangle, but are not limited thereto. For example, by setting the metal points M such as a star shape or a heart shape, it is possible to change the impression when the decorative film F is viewed from a distance and when the decorative film F is viewed from a close position, and the design is improved.

  The metal point M is 0.05 mm or more and 5 mm or less, more preferably 0.1 mm or more and 3 mm or less. For example, when forming a perfect circular metal point M, the diameter of the metal point M is set to the above numerical range. When the polygonal metal point M is formed, the maximum side length of the shape of the metal point M may be set to 0.05 mm or more and 5.0 mm or less.

  The minimum size of the metal point M that can be manufactured is 0.05 mm, but is preferably 0.1 mm or more in consideration of manufacturability. Further, by setting the metal point M to 0.1 mm or more, the texture of the metal may be reproduced more. If the size of the metal point M exceeds 5 mm, for example, when the metal point M is formed of aluminum, cracks occur in the metal point M during processing, and the texture of the metal point M may change. Therefore, by setting the metal point M to 5 mm or less, more preferably 3 mm or less, a change in the texture of the metal point M can be suppressed.

  There is a space between adjacent metal points M, and this space forms a metal film having translucency. The translucent metal film is a metal film giving an impression that the metal film is discontinuously formed by spaces between the metal points M formed in a halftone dot shape. The translucent metal film does not give an impression that the metal film is formed on one surface of the substrate S.

  The interval between the metal points M is 0.05 mm or more and 3 mm or less, more preferably 0.1 mm or more and 1 mm or less. Here, for example, the surface of the decorative film in which a plurality of metal points are formed at a narrow interval of less than 0.05 mm is similar to the metal itself, similarly to the decorative film in which the metal film is formed on one surface of the substrate S. It has a similar texture. On the other hand, in the present embodiment, by setting the distance between the metal points M to be 0.05 mm or more, a metal film having translucency is formed on the substrate S. Further, by setting the interval between the metal points M to be 0.1 mm or more, more preferably 0.2 mm or more, the interval between the metal points M can be surely recognized, and the design property is improved.

  However, when the interval exceeds 3 mm, the exposed portion of the substrate S increases, and there is a possibility that an impression that the metal points M are sparsely arranged on the substrate S may be given. Therefore, when the interval is 3 mm or less, more preferably 1 mm or less, the decorative film F that gives a metallic texture and gives a translucent impression as a whole when the substrate S is a transparent substrate is obtained. When the substrate S is an opaque substrate, a decorative film F giving an impression different from that of a substrate having a metal film formed on one surface is obtained due to the contrast between the color of the substrate S and the metal point M. When the size of the metal point M exceeds 1 mm, the interval between the metal points M is preferably set to 1 mm or less. If the size and the interval of the metal points M both exceed 1 mm, an impression that the metal points M are sparsely arranged is given.

  In addition, the transmission area of the decorative film F can be adjusted by adjusting the shape, size, and interval of the plurality of metal points M on the substrate S. For example, as shown in FIG. 2A, when rectangular 1 mm square metal points M are arranged at intervals of 0.2 mm, the transmission area is 31%. On the other hand, as shown in FIG. 2B, when circular metal points M having a diameter of 1 mm are arranged at intervals of 0.2 mm, the transmission area is 46%. Then, as shown in FIG. 3A, when the rectangular metal points M of 0.5 mm square are arranged at intervals of 0.1 mm, the transmission area becomes 31% as in FIG. 2A. By adjusting the transmission area of the substrate S, the transparency of the semi-transparent metal film can be changed. That is, it is possible to provide a decorative film F having a texture closer to that of the metal itself, and a decorative film F having a texture like a translucent metal when the substrate S is a transparent substrate.

  Here, when the substrate S is a transparent substrate and a metal film having translucency is formed, a translucent impression is given to the entire decorative film F. The state in which the decorative film F is translucent means that the decorative film F has transparency to the extent that characters and patterns arranged below the substrate S are visible. For the decorative film F, in order to obtain a translucent decorative film F as shown in FIG. 1 (a), the metal point M is adjusted so that the transmission area is 10 to 80%, more preferably 30 to 60%. It is preferable to adjust the shape, size, and spacing of the two. When the substrate S is an opaque substrate, it is preferable to set the transmission area between 10% and 80% in consideration of the balance between the color of the substrate S and the metal point M.

  When the transmission area is less than 10%, an impression is given that the metal points M are sparsely arranged. Further, since the interval is set to 0.1 mm or more, the transmission area does not exceed 80%. Further, by arranging the metal points M so that the transmission area is 30 to 60%, when the substrate S is a transparent substrate, a decorative film F giving a translucent impression can be obtained.

  After the formation of the metal points M, patterns, characters, and the like may be printed on the substrate S on which the metal points M are formed using ink or the like. Further, a protection layer (not shown) may be formed so as to cover the substrate S and the metal points M. The protective layer has a role of preventing discoloration of the metal points M and supporting adhesion between the substrate S and the metal points M.

  As the protective layer, a transparent film or a transparent varnish may be used. As the varnish, those used for OP varnish processing can be used, and oil-based varnish, aqueous varnish, UV varnish and the like can be applied. By applying and drying the varnish on the substrate S on which the metal points M are formed, the substrate S and the varnish are brought into close contact with each other, so that the metal points M are packed in the substrate S and the varnish. For example, in the cold stamping method described below, the adhesion between the substrate S and the metal point M may be insufficient. In such a case, it is effective to form a protective layer using a varnish.

[2. Manufacturing method of decorative film]
There are the following four methods for manufacturing the decorative film F of the present embodiment as described above.
(1) Hot stamping method (2) Cold stamping method (3) Paster type vapor deposition method (4) Celite type vapor deposition method Hereinafter, each manufacturing method will be individually described.

(1) Hot stamping method The method for manufacturing the decorative film F by the hot stamping method includes the following steps.
(A) A mounting step of mounting the metal film 11 on the substrate S.
(B) A hot stamping step of heating and pressing the substrate S on which the metal film 11 is mounted using a plate having a plurality of convex portions arranged in a halftone dot shape.

(A) Mounting Step As shown in FIG. 4A, in the mounting step, the metal film 11 is mounted on the substrate S. If air remains between the substrate S and the plate that presses the substrate S in a hot stamping step described later, the transfer of the foil at the center of the substrate S may be defective, and pinholes may be generated. Therefore, when a vertically movable plate is used, it is necessary to adjust the size of the substrate S so that pinholes do not occur.

  The metal film 11 is a transfer foil for hot stamping on which a desired metal is deposited in advance. Specifically, the metal film 11 is a transfer foil having at least a film layer, a release layer, a metal layer, and an adhesive layer. The film layer is a film serving as a base of the metal film 11, and for example, a polyester film can be used. The film layer is a layer that is separated without being transferred to the substrate S.

  The release layer is a layer formed using an allyl resin or a cellulose resin on the film layer. The release layer peels the film layer from the metal layer. The release layer may be peeled off together with the film layer, or may be transferred onto the substrate S together with the metal layer.

  The metal layer is a layer formed on the release layer and having a desired metal deposited thereon. For example, a metal layer on which aluminum is deposited by a vacuum deposition method can be used. When the metal film 11 has a hologram, the metal layer includes a hologram layer and a metal deposition layer. The hologram layer is a layer in which fine irregularities are formed by embossing a resin layer such as a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, and an electron beam curable resin. The metal deposition layer is a layer formed on the hologram layer and on which a desired metal is deposited.

  The adhesive layer is a layer formed on the metal layer using, for example, acrylic or PET and having an adhesive force to the substrate S. In addition, the metal film 11 may have a well-known layer applied to the transfer foil for hot stamping, such as a printing layer and a surface protection layer, if necessary, in addition to the above-described layers. The metal film 11 as described above is placed so that the adhesive layer faces the substrate S.

(B) Hot Stamping Step As shown in FIG. 4 (b), in the hot stamping step, the substrate S on which the metal film 11 is placed is placed on a table (not shown), and a plurality of projections arranged like halftone dots. The metal plate 200 having the portion 20 is pressed from above. The height of the projection 20 is about 0.5 mm, and the size of the top surface of the projection 20 is 0.1 mm or more. In addition, there is a space between the top surfaces of the adjacent protrusions 20, and a semi-transparent metal film is formed by this space. Specifically, the interval between the top surfaces of the projections 20 is 0.2 mm or more. Since the plate 200 is attached to a heat source (not shown), the plate S is heated while being pressed. The plate 200 may be configured to move up and down together with the hot plate, or may be configured to connect the roller type plate 200 to a heating source.

  In the hot stamping method, the interval between the top surfaces of the adjacent projections 20 is 0.2 mm or more, that is, the interval between the metal points M is 0.2 mm or more in consideration of the processing of the plate 200. It is. Technically, it is not impossible to produce a plate 200 capable of forming a metal point M of 0.05 mm and a spacing of 0.1 mm. However, when the plate 200 made of brass or copper is used as before, the tip of the projection 20 may be crushed at the stage of foil pressing. Therefore, the strength of the plate 200 needs to be improved. For this reason, it is considered that the development cost and the material cost of the plate 200 capable of forming the metal points M of 0.05 mm and the interval of 0.1 mm will increase. By setting the interval between the top surfaces of the projections 20 to 0.2 mm or more, the board 200 can be processed using a conventionally used material, and the cost is high.

  By being pressed by the plate 200, the top surface of the projection 20 of the plate 200 comes into contact with the substrate S via the metal film 11. Then, when the metal film 11 is heated by the plate 200, the adhesive layer of the metal film 11 is heated at a position where the top surface of the projection 20 contacts, and has an adhesive force to the substrate S.

  Then, as shown in FIG. 4C, when the plate 200 is moved upward and the metal film 11 is peeled off, the film layer is peeled off via the release layer at the place where the top surface of the projection 20 is in contact. You. On the other hand, in a portion where the top surface of the convex portion 20 does not contact, the adhesive layer is not heated and thus does not adhere to the substrate S. Therefore, on the surface of the substrate S, a plurality of metal points M are formed in a halftone dot shape corresponding to the arrangement of the plurality of projections 20. That is, the interval between the adjacent metal points M of the decorative film F manufactured by the hot stamping method is 0.2 mm or more. Further, the thickness of the metal point of the decorative film F manufactured by the hot stamping method is 300 to 600 °.

(2) Cold stamping method The method for manufacturing the decorative film F by the cold stamping method includes the following steps.
(A) A printing step of printing a plurality of dots arranged in a halftone pattern on the substrate S with an ultraviolet curable ink. (B) Compression bonding of pressing a metal film on the substrate S on which the ultraviolet curable ink is printed. Step (c) An ultraviolet irradiation step of irradiating the substrate S with the metal film 12 pressed thereto with ultraviolet light.

(A) Printing Step In the printing step, as shown in FIG. 5A, a plurality of dots arranged in a dot pattern are printed on the substrate S using the ultraviolet curable ink I1. The ultraviolet curable ink I1 is an adhesive that cures when irradiated with ultraviolet light. There is a space between adjacent points of the printed ultraviolet curable ink I1, and a semitransparent metal film is formed by this space. The distance between adjacent points is at least 0.1 mm. The size of the substrate S used in the cold stamping method is limited by the printing device that prints the ultraviolet curable ink I1. However, a decorative film larger than the decorative film F that can be manufactured by the hot stamping method can be manufactured.

  Prior to the printing step, a step of forming an easy adhesion layer (not shown) on the substrate S may be provided. Depending on the material of the substrate S, the compatibility with the ultraviolet curable ink I1 may be deteriorated, and the adhesion between the substrate S and the metal spot M may be reduced. In such a case, by providing an easy-adhesion layer made of a material compatible with the ultraviolet curable ink I1 on the substrate S, the adhesiveness between the substrate S and the metal spot M can be improved.

(B) Pressure Bonding Step In the pressure bonding step, as shown in FIG. 5B, the metal film 12 is bonded to the substrate S on which the ultraviolet curable ink I1 is printed. The metal film 12 is a transfer foil for cold stamping on which a desired metal is deposited in advance. The metal film 12 has at least a film layer and a metal layer. The film layer is a film serving as a base of the metal film 12, and for example, a polyester film can be used. The film layer is a layer that is separated without being transferred to the substrate S.

  The metal layer is a layer formed on the film layer, on which a desired metal is deposited. For example, a metal layer on which aluminum is deposited by a vacuum deposition method can be used. When the metal film 12 has a hologram, the metal layer includes a hologram layer and a metal deposition layer. The hologram layer is a layer in which fine irregularities are formed by embossing a resin layer such as a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, and an electron beam curable resin. The metal deposition layer is a layer formed on the hologram layer and on which a desired metal is deposited.

(C) Ultraviolet Irradiation Step In the ultraviolet irradiation step, as shown in FIG. 5C, the substrate S to which the metal film 12 is pressed is irradiated with ultraviolet rays having a wavelength for curing the ultraviolet curable ink I1 using the UV lamp 300. I do. The ultraviolet curable ink I1 is cured by the irradiation of the ultraviolet light. Then, as shown in FIG. 5D, when the metal film 12 is peeled off, the metal layer is transferred to the substrate S at the portion where the ultraviolet curable ink I1 is printed, and the film layer is peeled.

  On the other hand, the metal layer does not adhere to the substrate in a portion where the ultraviolet curable ink I1 is not printed. Therefore, on the surface of the substrate S, a plurality of metal points M are formed in a halftone dot shape corresponding to the arrangement of the printed ultraviolet curable ink I1. That is, the interval between the adjacent metal points M of the decorative film F manufactured by the cold stamping method is 0.1 mm or more. The thickness of the metal spot of the decorative film F produced by the cold stamping method is 100 to 300 °.

(3) Paster type vapor deposition method The manufacturing method of the decorative film F by the paster type vapor deposition method includes the following steps.
(A) A vapor deposition step of vapor-depositing a metal film on the substrate S. (b) Printing by printing a plurality of dots arranged in a halftone dot on the metal film vapor-deposited on the substrate S using an alkali-resistant ink. Step (c) An immersion step of immersing the substrate S in an alkaline solution

(A) Deposition Step In the deposition step, a metal film 13 is formed by vacuum depositing a metal on the substrate S as shown in FIG. When the metal point M of the decorative film F is used as a hologram, fine irregularities may be formed on the metal film 13 by vacuum embossing. Note that an embossing process may be provided before the deposition process to form fine irregularities on the substrate S in advance, and then the metal film 13 may be deposited.

(B) Printing Step In the printing step, as shown in FIG. 6B, a plurality of dots arranged in a dot pattern are printed on the metal film 13 deposited on the substrate S with the alkali-resistant ink I2. . There is a space between adjacent points of the printed alkali-resistant ink I2, and this space forms a metal film having translucency. The distance between adjacent points is at least 0.1 mm.

(C) Immersion Step In the immersion step, as shown in FIG. 6C, the substrate S on which the alkali-resistant ink I2 is printed on the metal film 13 is immersed in an alkali solution 400 such as an aqueous sodium hydroxide solution. Then, the alkali-resistant ink I2 is not printed, and the exposed portion of the metal film is dissolved. The substrate S immersed in the alkaline solution 400 is washed with water to remove the alkaline solution, and then dried.

  As shown in FIG. 6D, the metal film 13 remains deposited on the substrate S at a portion where the alkali-resistant ink I2 is printed. On the other hand, in a portion where the alkali-resistant ink I2 is not printed, the metal film 13 dissolves and does not remain on the substrate S. Therefore, on the surface of the substrate S, a plurality of metal points M are formed in a halftone dot shape corresponding to the arrangement of the printed alkali-resistant ink I2. The spacing between adjacent metal points M of the decorative film F manufactured by the paster deposition method is 0.1 mm or more. In addition, the thickness of the metal point of the decorative film F manufactured by the paster deposition method is 100 to 600 °.

(4) Sealight method vapor deposition method The manufacturing method of the decorative film F by the sealight method vapor deposition method includes the following steps.
(A) A printing step of printing a water-based ink on the substrate S so as to leave a plurality of dots arranged in a halftone pattern. (B) A metal film is deposited on the substrate S on which the water-based ink is printed. Vapor deposition step (c) Immersion step of immersing substrate S in water

(A) Printing Step In the printing step, as shown in FIG. 7A, the aqueous ink I3 is printed on the substrate S so as to leave a plurality of dots arranged in halftone dots. That is, the water-based ink I3 is not printed on the plurality of dot portions arranged in a halftone dot shape, and the substrate S is exposed. At a plurality of dots arranged in a halftone dot shape left by the printed aqueous ink I3, there is a space between adjacent points, and the space forms a metal film having translucency. The distance between adjacent points is at least 0.1 mm.

(B) Vapor Deposition Step In the vapor deposition step, as shown in FIG. 7B, a metal is vacuum-deposited on the substrate S on which the aqueous ink I3 is printed to form the metal film 13. When the metal point M of the decorative film F is used as a hologram, fine irregularities may be formed on the metal film 13 by vacuum embossing. Note that an embossing process may be provided before the deposition process to form fine irregularities on the substrate S in advance, and then the metal film 13 may be deposited.

(C) Immersion Step In the immersion step, as shown in FIG. 7C, the substrate S on which the metal film 13 is deposited on the aqueous ink I3 is immersed in water 500. Then, the metal film in the portion where the aqueous ink I2 is printed is dissolved. The substrate S immersed in the water 500 is dried.

  As shown in FIG. 7D, at the portion where the aqueous ink I3 is printed, the metal film 13 is dissolved and does not remain on the substrate S. On the other hand, in a portion where the aqueous ink I3 is not printed, the metal film 13 remains deposited on the substrate S. Therefore, on the surface of the substrate S, a plurality of metal dots M are formed in a halftone dot shape corresponding to a portion where the aqueous ink I3 is not printed. The distance between adjacent metal points M of the decorative film F manufactured by the sealant deposition method is 0.1 mm or more. Further, the thickness of the metal point of the decorative film F manufactured by the sealant type vapor deposition method is 100 to 600 °.

[3. Effect]
The effects of the decorative film of the present embodiment having the above-described configuration and the manufacturing method thereof will be described below.
(1) Having a substrate S, a plurality of metal points M arranged in a halftone dot shape are formed on one surface of the substrate S, and there is a space between adjacent metal points, and the space is semi-transparent. A metal film having a property is formed.

  In the decorative film F as described above, a semi-transparent metal film is formed due to the space between the metal points M, and an impression different from that of the metal itself can be given, and the decorative film F having excellent design properties. Can be provided.

(2) The distance between adjacent metal points is 0.1 mm or more.

  When the interval between adjacent metal points is 0.1 mm or more, the interval can be visually confirmed without fail. Therefore, by adjusting the shape and size of the metal point M, it is possible to provide the decorative film F having a texture like a translucent metal. Further, when the substrate S is a colored substrate S, it is possible to give an impression different from that of a substrate having a metal film formed on one surface due to a difference between the color of the substrate S and the color or texture of the metal points M. , The design is improved.

(3) The substrate S is a transparent substrate.

  By making the substrate S a transparent substrate, it is possible to give a translucent impression more reliably, and it is possible to improve the design.

(4) The metal at metal point M is aluminum

  Conventionally, aluminum has low stretchability, and when integrally molded with a resin molded product by film insert molding or in-mold molding, whitening may occur due to cracking. Therefore, conventionally, a metal having high stretchability has been used instead. However, the decorative film F of the present embodiment has an interval between the metal points M. Since the metal film on the substrate S is divided beforehand by this interval, the occurrence of cracks at the metal points M is prevented. Accordingly, since it is possible to perform integral molding using the decorative film F on which the metal points M of aluminum having high luminance are formed, the design property is improved. Aluminum is a metal that does not have radio wave transmission. However, the space between metal points M can impart radio wave transmission even when aluminum is used for the decorative film F.

(5) The metal point M is a hologram.

  Conventionally, holograms have been used for security applications such as forgery prevention. Holograms used for security applications include, for example, a transparent hologram foil that is pasted on a seal of a bankbook. By making the metal points M of the decorative film F into a hologram, the decorative film F is improved in designability and can be used as a hologram sheet for security use.

(6) The substrate S is a thermoplastic resin.

  By making the substrate S a thermoplastic resin, the decorative film F can be integrally molded with a resin molded product by film insert molding or in-mold molding.

(7) A placing step of placing the metal film 11 on the substrate S, and a step of placing the substrate S on which the metal film 11 is placed on the plate 200 having the plurality of convex portions 20 arranged in a halftone dot shape. And a hot stamping step of heating and pressurizing, and there is a space between the top surfaces of the plurality of projections 20, and a semi-transparent metal film is formed by this space.

  In the hot stamping method, the decorative film F can be manufactured by using a conventionally used transfer foil for hot stamping. For example, a translucent metal film typified by the above-mentioned transparent hologram for security use is manufactured by forming a thin metal film on a transparent substrate. That is, the hologram foil having no transparency and the transparent hologram foil are manufactured by different manufacturing processes.

  On the other hand, when the hot stamping method of the present embodiment is used, a transparent hologram foil can be manufactured using a hologram foil having no transparency. Therefore, the decorative film F with high designability can be manufactured without separately securing equipment for manufacturing the transparent hologram foil.

(8) A printing step of printing a plurality of dots arranged in a halftone pattern with the ultraviolet curable ink I1 on the substrate S, and pressing the metal film 12 on the substrate S on which the ultraviolet curable ink I1 is printed. Pressurizing step, and an ultraviolet irradiation step of irradiating the substrate S with the metal film 12 pressed thereto with ultraviolet rays. There is a space between the plurality of points, and the metal film having translucency is formed by the space. It is formed.

  In the cold stamp method, the ultraviolet curable ink I1 is printed using a printing machine. Accordingly, the metal points M can be manufactured at intervals of 0.1 mm or more without being limited by the shape of the plate 200 as in the hot stamping method. In the hot stamping method, the transferable area is limited from the viewpoint of preventing pinholes, but the cold stamping method can provide a relatively large decorative film F according to the size of the printing device. .

(9) An evaporation step of evaporating the metal film 13 on the substrate S, and printing of a plurality of dots arranged in a halftone dot on the metal film 13 evaporated on the substrate S using the alkali-resistant ink I2. And a dipping step of dipping the substrate S in the alkaline solution 400. There is a space between the plurality of points, and the space forms a translucent metal film.
(10) A printing step of printing the aqueous ink I3 on the substrate S so as to leave a plurality of dots arranged in a halftone pattern, and forming the metal film 13 on the substrate S on which the aqueous ink is printed I3. The method includes a vapor deposition step of vapor deposition and an immersion step of immersing the substrate S in water. There is a space between the plurality of points, and the space forms a metal film having translucency.

  In the paster method and the sealant method, roll-to-roll production can be performed, so that production efficiency can be improved. That is, the substrate S unwound from the roll is introduced into the metal vapor deposition furnace to perform vapor deposition, and a step of printing ink before and after the vacuum vapor deposition furnace can be provided. And by arranging the equipment for performing each immersion step, the decorative film F can be manufactured in a continuous step. Therefore, the decorative film F having a film width of more than 1000 mm can be manufactured.

[4. Other Embodiments]
In the above-described embodiment, a form in which metal points having the same shape and size are regularly arranged at regular intervals is illustrated as the metal points M arranged in a halftone dot shape. However, the size and shape of the metal point M need not always be the same. For example, the difference in shading may be expressed by arbitrarily adjusting the size of the metal point M. For example, if the interval between the halftone dots is small and the dots are large, the color looks dark. Also, if the intervals are wide and the dots are small, the color looks light. By regularly adjusting the size and interval of the halftone dots in this way, the color tone can be reproduced, for example, a photograph or the like can be reproduced by the metal dots M, and the design property of the decorative film F is improved.

  Similarly, the intervals between the metal points M need not always be the same. For example, even if the metal points M have the same size, if the size of the interval is different, a difference in shading occurs. For example, even if the sizes of the halftone dots are the same, a dark color can be reproduced by increasing the aggregation density of the halftone dots. That is, various patterns can be reproduced by the metal points M by changing the aggregation density of the halftone dots. Thereby, the design property of the decorative film F is improved.

S: Substrate M: Metal points 11, 12: Metal film 13: Metal film 200: Plate 20: Convex part 300: UV lamp 400: Alkaline solution 500: Water

Claims (11)

Having a substrate,
On one surface of the substrate, a plurality of metal dots arranged in a dot pattern are formed,
A decorative film in which there is a space between adjacent metal points, and the space forms a translucent metal film.   The decorative film according to claim 1, wherein an interval between adjacent metal points is 0.1 mm or more.   The decorative film according to claim 1, wherein the substrate is a transparent substrate.   The decorative film according to any one of claims 1 to 3, wherein the metal at the metal point is aluminum.   The decorative film according to any one of claims 1 to 4, wherein the metal point is a hologram.   The decorative film according to any one of claims 1 to 5, wherein the substrate is a resin having thermoplasticity. A mounting process of mounting a metal film on a substrate,
A hot stamping step of heating and pressing the substrate on which the metal film is mounted using a plate having a plurality of convex portions arranged in a halftone dot,
A method for manufacturing a decorative film, wherein there is a space between the top surfaces of the plurality of protrusions, and the space forms a translucent metal film. On the substrate, a printing step of printing a plurality of dots arranged in a halftone dot by ultraviolet curable ink,
A pressing step of pressing a metal film on the substrate on which the ultraviolet-curable ink is printed,
An ultraviolet irradiation step of irradiating ultraviolet light to the substrate on which the metal film is pressed,
A method for manufacturing a decorative film, wherein there is a space between the plurality of points, and the space forms a translucent metal film. On a substrate, a deposition step of depositing a metal film,
On the metal film deposited on the substrate, a printing step of printing a plurality of dots arranged in a halftone dot with an alkali-resistant ink,
An immersion step of immersing the substrate on which the alkali-resistant ink is printed in an alkaline solution,
A method for manufacturing a decorative film, wherein there is a space between the plurality of points, and the space forms a translucent metal film. On the substrate, a printing step of printing the aqueous ink so as to leave a plurality of dots arranged in a halftone,
On the substrate on which the aqueous ink is printed, a deposition step of depositing a metal film,
An immersion step of immersing the metal film-deposited substrate in water,
A method for manufacturing a decorative film, wherein there is a space between the plurality of points, and the space forms a translucent metal film.   The method for manufacturing a decorative film according to claim 7, wherein an interval between the spaces is 0.1 mm or more.