JP2007175942A - Transfer foil and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer foil which can be used to easily decorate a surface to which the foil is transferred and exhibits excellent glittering sensation on the surface, and a method for manufacturing the transfer foil. <P>SOLUTION: This transfer foil comprises: at least a glittering layer composed of a glitter obtained by coating a metal or a metal oxide to glass flake as a body material and a transparent resin; and an adhesive layer for making the glittering layer adhere to the surface to which the foil is transferred. Besides, in manufacturing the transfer foil, a coating liquid with a specified viscosity is used for forming the glittering layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transfer foil and a method for producing the same. More specifically, the present invention can be used on paper surfaces, plastic surfaces, glass surfaces, ceramic surfaces, metal surfaces, leather surfaces, and other surfaces to be transferred. In addition, the present invention relates to a transfer foil capable of providing a glittering decoration with an excellent glitter feeling and a method for producing the same.

  Conventionally, various glitter transfer foils used for glitter decoration have been proposed. For example, in a transfer film formed by including a pressure-sensitive adhesive layer, a colored layer on the front side from the pressure-sensitive adhesive layer, and a clear layer on the front side from the colored layer, the colored layer is composed of an upper layer and a back side having a thin film thickness on the front side. It has been proposed to form a two-layer structure with a thick lower layer and to contain a scaly bright agent in the upper layer (see, for example, Patent Document 1). Further, an application film may be stretched on the clear layer as necessary. The glitter pigment is a metallic pigment whose glitter is made of scaly aluminum powder or mica powder. At the time of use, it is used by being attached to, for example, an automobile which is a transfer surface through an adhesive layer.

  However, these metallic pigments are considered to have a room for improvement because they have normal luster (a shining feeling). Actually, scaly aluminum powder, mica powder, and the like require a clear layer and an application film on the transfer surface. Therefore, recently, a luster pigment (see, for example, Patent Document 2) in which the surface of glass flakes known as Metashine (trade name: Nippon Sheet Glass Co., Ltd.) is coated with titania, silver and nickel has been proposed. Pigments are used in paints, glitter sheets and the like (see Patent Documents 3 and 4).

The glitter sheet is formed by sequentially laminating a glitter layer including glitter glass flakes coated with at least one selected from the group consisting of a base material layer, an adhesive layer, a metal and a metal oxide, and the glitter layer Is made of a thermoplastic resin having a thermal shrinkage stress of 0.1 to 1 MPa in at least one of the vertical direction and the horizontal direction, and is used together with the base material layer for simultaneous injection molding. Therefore, the base material layer and the glittering layer are fixed with an adhesive layer and are not released like the transfer sheet and the transfer foil.
JP-A-5-309996 JP 2001-011340 A JP 2003-12962 A JP 2004-284019 A

  As described above, there is no transfer stamp foil that is particularly easy to decorate as a hot stamp foil, and a glittering layer containing a metallic pigment as in the past has uniformity of the pigment. From the point, there is no thickness of the layer itself, and it is not possible to give sufficient decoration.

  In view of such circumstances, the present invention is intended to provide a transfer foil that can be easily decorated on a surface to be transferred and is excellent in glitter on the surface to be transferred, and a method for manufacturing the same.

  In order to solve the above-mentioned problems, the present inventors have used glass-like flakes coated with a glittering layer, that is, metal or metal oxide, on the surface of the release film, for example, Metashine (trade name: Nippon Sheet Glass Co., Ltd.). The transfer foil, especially hot stamping foil, which can be easily decorated on the transfer surface and is excellent in the glitter on the transfer surface. It has been found out that it can be done, and has led to the present invention.

That is, the present invention is characterized by the following configurations or requirements.
(1) A glitter layer comprising a glitter pigment and a transparent resin in which a metal flake is coated on at least a base material of glass flake on a film surface or a mold release film surface on which a release layer is formed. And an adhesive layer that adheres the glitter layer to the transfer surface.
(2) A vapor-deposited layer comprising a metal, a metal salt, or a metal oxide, or a colored pigment layer containing a colored pigment, between the glitter layer and the adhesive layer, or between the release layer and the glitter layer. The transfer foil according to (1) above, wherein
(3) A heating-type heating stamp foil, wherein the adhesive layer in the transfer foil according to (1) or (2) is a hot-melt adhesive layer.
(4) The transfer foil according to (1), wherein the glitter layer contains the glitter pigment in an amount of 1 to 40% by mass.
(5) In the method for producing a transfer foil as described in (1) or (2) above, a glittering layer is formed by applying a coating liquid comprising the glitter pigment and the transparent resin on the release film surface. Then, a method for producing a transfer foil in which a vapor deposition layer, a pigment layer or an adhesive layer is formed on the surface of the glitter layer.
(6) The transfer according to (5), wherein the coating liquid composed of the glitter pigment and the transparent resin has a viscosity of 100 to 15000 mPa · S (E-type viscometer: temperature 25 ° C., shear rate 76.8 S ⁻¹ ). Foil manufacturing method.

  In the present invention, the glittering layer of the transfer foil does not use aluminum powder or aluminum vapor-deposited pulverized pieces, and the glittering pigment in which the base material of the glass flake is coated with metal or metal oxide is dispersed in the transparent resin. Therefore, after the production, the glitter layer is in contact with a smooth surface such as a release film surface, and after transfer, the contact surface becomes the surface of the transfer surface, and the surface of the transfer surface The surface maintains high smoothness, and a sparkle feeling is further exhibited.

Furthermore, during the production of the glitter layer, the viscosity of the coating liquid composed of the glitter pigment and the transparent resin is set to 100 to 15000 mPa · S (E-type viscometer: temperature 25 ° C., shear rate 76.8S ^−1). ), And particularly preferably in the range of 100 to 300 mPa · S, the glitter pigment is applied in a state of being spread and dispersed almost uniformly due to the application thickness and the like. Further, the glitter pigment in this case is preferably contained in the glitter layer in an amount of 1 to 40% by mass, particularly 5 to 33% by mass.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 (a) to 1 (c) are examples of embodiments for carrying out the invention, and in the figure, the same reference numerals denote the same parts.

  As shown in FIG. 1A, the hot stamp foil 1 uses a release film 4. The release film 4 includes a polyester sheet having a thickness of 10 to 75 μm and a release layer 5. Examples of the resin sheet include olefin resins such as polypropylene, polyethylene, polymethylpentene, ethylene-propylene copolymer, and olefin thermoplastic elastomer, thermoplastic polyester resins such as polyethylene terephthalate and polybutylene terephthalate, vinyl chloride resin, and polyamide. A single layer sheet or a laminate of a resin or a resin such as a urethane-based thermoplastic elastomer can also be used. In addition to the resin sheet, paper, metal foil, or a laminate thereof can be used as the release film. For example, a support sheet having a structure in which polypropylene is laminated on high quality paper. In addition, the thickness of the film for mold release is about 10-200 micrometers normally.

  As shown in FIG. 1A, in the present embodiment, a release layer 5 is provided to adjust the peelability from the transfer layer. It may be a film. The release layer 5 is applied on the resin sheet 4 with a thickness of about 3 μm so that the surface becomes smooth with a knife coater (including a doctor blade). The release layer 5 is peeled and removed from the transfer side as a part of the release film at the time of peeling. Examples of the release layer 5 include generally available release agents, for example, silicone resins, melamine resins, polyamide resins, urethane resins, polyolefin resins, waxes and the like, or mixtures containing these. As a coating method, conventionally known methods such as gravure direct coating, gravure reverse coating, knife coating, air coating, roll coating, etc. can be employed.

  As shown in FIG. 1A, a glittering layer 6 as a transfer layer is provided on the release layer 5. The glitter layer 6 is coated on the release layer 5 of the release film 4 so that the thickness is about 0.5 to 35 μm, particularly preferably 2 to 9 μm, so that the surface becomes smooth with a knife coater. Provided. The glitter layer 6 is composed of a glitter pigment obtained by coating a metal or metal oxide on a base material of glass flake and a transparent resin. Specifically, the glitter pigment is Metashine (product number: ME2040PS manufactured by Nippon Sheet Glass Co., Ltd.). Is done. The bright pigment is a base material coated with a metal or metal oxide. As the coating metal, in addition to silver, nickel, etc., metal such as gold, platinum, palladium, copper, aluminum, chromium, brass, tin, etc. Or an alloy. Examples of the metal oxide include rutile type titanium oxide. Examples of the method for coating the glass flake as a base material with a metal or the like include electroless plating and sputtering. The glitter pigment of this embodiment is transparent with no coloring in the base material, and has a very smooth surface. The bright pigment such as metashine has an average thickness in the range of 0.5 to 20 μm and an average particle diameter in the range of 10 to 4000 μm.

  For the transparent resin of the glitter layer 6 of this embodiment, an amino-based cured resin such as urea resin or melamine resin is used. Other specific transparent resins used include cellulose resin, melamine resin, polyester resin, polyamide resin, polyolefin resin, acrylic resin, styrene resin, ethylene-vinyl acetate copolymer, styrene. -Thermoplastic elastomers such as butadiene rubber. In particular, as the hot stamp foil, amino-based cured resins such as urea resins and melamine resins, cellulose resins, and acrylic resins are preferably used in terms of heat resistance and the like.

  The glittering layer 6 of this embodiment contains a glittering pigment at a concentration of about 32% by mass. In the glittering layer, it is usually preferably contained in the range of 1 to 40% by mass, particularly 5 to 33% by mass. If the glitter pigment in the glitter layer is less than 1% by mass, sufficient glittering feeling will not occur on the transfer surface. On the other hand, when the amount of the glitter pigment in the glitter layer exceeds 40% by mass, uniform dispersion in the glitter layer cannot be achieved, and the feeling of glittering is hindered.

  The glitter layer 6 of this embodiment is formed by applying a coating liquid of a glitter pigment and a transparent resin to the release layer 5 by the method described above. A coating liquid consists of a solvent (water and / or organic solvent), the said pigment, and unreacted curable resin, or solvent soluble resin, and may contain a viscosity modifier, a dispersing agent, and other required additives as needed. The coating liquid is adjusted to the above-described viscosity in order to prevent the glittering pigment from being precipitated and separated. The particularly preferred viscosity of the coating solution is in the range of 100 to 300 mPa · S. The above-mentioned glitter pigment has a specific gravity of about 3 and the dispersion of the glitter pigment at the time of coating and layer reaction formation is sufficiently maintained as long as the viscosity of the coating liquid is within this range. The excellent glitter feeling in the transfer foil can be maintained. In addition, the solvent of a coating liquid can mention water, a lower alcohol, polyethyleneglycol, glycerol, propylene glycol, 1, 3- butylene glycol etc. as a solvent besides this.

  In addition, a viscosity modifier can be added to the coating solution for the purpose of adjusting the viscosity as described above. As the viscosity modifier, generally available polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, acrylic acid ester, poly N-vinyl acylamide, polysaccharides such as galactomannan, alginic acid, hyaluronic acid, starch, carrageenan, xanthan gum, Examples thereof include gums such as gar gum, gellan gum, rhamsan gum, and welan gum, and celluloses such as hydroxypropyl cellulose (HPC) and hydroxyethyl cellulose (HEC). Usually, the thickness of the cured and dried glitter layer 6 after application is in the range of 0.5 to 30 μm.

  In the transfer foil of this embodiment, the adhesive layer 7 is laminated on the glitter layer. The adhesive layer 7 is formed by applying a thickness of about 3 μm with a knife coater. As the adhesive for the adhesive layer 7, a polyvinyl acetate adhesive that is a heat-sensitive melting adhesive (hot melt adhesive) is used. Examples of the heat-sensitive adhesive include polyvinyl acetate resin, vinyl chloride-vinyl acetate copolymer, nylon, acrylic resin, polystyrene, thermoplastic polyester resin, thermoplastic urethane resin, and polycondensation of dimer acid and ethylenediamine. The conventionally well-known adhesive agent by the obtained polyamide resin etc. can be used. Further, rubbers such as natural rubber, chloroprene rubber, nitrile rubber, SBR, urethane rubber can be used.

  The transfer foil 1 having such a configuration is used as shown in FIG. That is, as shown in FIG. 2A, the transfer paper 13 is placed on the work table 11, and the transfer paper 13 is covered with the transfer foil 1 according to the present embodiment with the adhesive layer 7 on the lower surface. . Next, the predetermined pressing surface 12 of the hot stamper 10 of the work table 11 is heated, and the hot stamper 10 moves downward.

  As a result, as shown in FIG. 2B, the transfer portion (brightness layer) 14 is transferred to a predetermined portion of the transfer paper 13, and an excellent pattern with a glittering appearance appears (see FIG. 2B). On the paper surface, the black transfer portion 14 is used, but it is actually a portion with a sparkling feeling.)

  In this embodiment, the transfer surface is the transfer paper 13, but it is not necessary to be limited to this. For example, it can be used not only for paper such as coated paper, laminated paper, foil paper, but also for plastic films, plastic molded products, leather, and others.

  As another embodiment, a vapor deposition layer 8 may be provided between the glitter layer 6 and the adhesive layer 7 as shown in FIG. The vapor deposition layer may be an aluminum vapor deposition layer or other metal vapor deposition layer. By providing such a vapor deposition layer, it is possible to sufficiently decorate the transfer foil without being affected by the background surface of the transfer target surface.

  As another embodiment, a colored pigment layer 9 may be provided between the glitter layer 6 and the adhesive layer 7 as shown in FIG. The colorant for the colored pigment layer 9 may be an organic pigment or an inorganic pigment, and may be a natural pigment or a synthetic pigment. Examples of inorganic pigments include ultramarine blue, bitumen, cadmium yellow, bengara, chrome yellow, lead white, titanium white, carbon black, and other pigments. Examples of organic pigments include azo, triphenylmethane, quinoline, anthraquinone, phthalocyanine, and other organic pigments, and general-purpose pigments include red 202, red 226, yellow 203, yellow 401, Blue 404 etc. are mentioned. For the purpose of assisting the pigment effect, conventionally known coloring dyes can be added to the coating solution. Further, a binder resin or the like is added to the color pigment layer 9 as necessary.

  In the transfer foil 3 provided with such a colored pigment layer 9, it is possible to obtain a colorful and glittering pattern with a colored pattern and glitter.

  In the above-described embodiment, the color pigment layer 9 is provided between the glitter layer 6 and the adhesive layer 7, but may be provided between the release layer 5 and the glitter layer 6.

  Since the transfer foil of the present invention and the manufacturing method thereof are used by dispersing a glitter pigment coated with a metal or metal oxide on a base material of glass flakes in a transparent resin, the glitter layer is prepared after the production, Since it is in contact with a smooth surface such as a release film surface and after transfer, the surface to be transferred maintains high surface smoothness on the surface to be transferred, so it has excellent glitter. It has high industrial applicability.

1A to 1C are cross-sectional views of a transfer foil according to the present invention. FIG. 2A or FIG. 2B is a schematic view of an apparatus for transferring a hot stamp foil according to the present invention to a transfer surface and an object to be transferred.

Explanation of symbols

1, 2, 3 Transfer foil 4 Release film 5 Release layer 6 Bright layer 7 Adhesive layer 8 Deposition layer 9 Colored pigment layer

Claims (6)

  A glittering layer comprising a glittering pigment and a transparent resin having at least a glass flake base material coated with metal or metal oxide on a film surface or a release film surface on which a release layer is formed, and a transferred layer A transfer foil comprising an adhesive layer for sequentially adhering the glittering layer to a surface.   A vapor deposition layer made of a metal, a metal salt, or a metal oxide, or a pigment layer containing a color pigment was provided between the glitter layer and the adhesive layer, or between the release film and the glitter layer. The transfer foil according to claim 1.   The heating-type heating stamp foil, wherein the adhesive layer in the transfer foil according to claim 1 or 2 is a hot-melt adhesive layer.   The transfer foil according to claim 1, wherein the glitter layer contains a glitter pigment in a range of 1 to 40% by mass.   3. The method for producing a transfer foil according to claim 1, wherein a coating layer comprising the glitter pigment and the transparent resin is applied to the release film surface to form a glitter layer, and then the glitter layer surface. A method for producing a transfer foil comprising a vapor deposition layer, a pigment layer or an adhesive layer formed thereon. The method for producing a transfer foil according to claim 5, wherein the coating liquid comprising the glitter pigment and the transparent resin has a viscosity of 100 to 15000 mPa · S (E-type viscometer: temperature 25 ° C., shear rate 76.8 S ⁻¹ ). .

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