JP2017065193A - Image formation body and image formation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image formation body capable of selectively forming images different between front and back and seen correctly from respective directions of front and back, and an image that adorns with expression a landscape or an image that is in the back of a transparent substrate.SOLUTION: An image formation body obtained by sequentially and selectively laminating a first dye dyeing layer 2, a white hiding layer 4, a second dye dyeing layer 5, and a protective layer 7 on one surface of a transparent substrate 1, in which, by forming a first image 3 and a second image 6 respectively on the first dye dyeing layer 2 and the second dye dyeing layer 5 from a sublimable dye, a region where the first image 3 can be observed from one surface of the transparent substrate 1 and the second image 6 can be observed from the other surface of the transparent substrate 1, and a region where the first image 3 and the second image 6 are observed from one surface of the transparent substrate 1 are mixed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image forming body and an image forming method in which two different images are formed on one surface of a transparent substrate, and more particularly to an image forming body and an image forming method capable of observing different images on the front and back of a transparent substrate.

  Various media such as paper, plastic film, discs such as CD-ROM, and glass plates have come to be used as media for recording and displaying images including characters.

  When forming a color image with these media, if the paper is paper, the color of the image is reproduced using paper white. On the other hand, when the background is not white, such as a plastic film or CD-ROM, a concealing layer and a white layer are provided so that the image is not affected by the background, and an image is formed thereon.

  Thus, when an image is formed on one surface of a transparent film, there is a problem that the image cannot be correctly viewed from the back surface. For example, advertisements attached to train windows of trains and buses, product labels attached to transparent plastic bottles, and the like.

  In order to solve these problems, it has been considered to print differently on the front and back. One is a method of printing from each side of the media. However, this method of printing on both sides has a drawback that it becomes necessary to reverse the front and back at the time of printing, or to use a printing machine having a printing mechanism corresponding to each of the front and back, resulting in high cost. In addition, since printing is performed on both sides of the media, there is a problem that the friction resistance is poor and the suitability for advertisement of a car window is low.

  Therefore, as a method for forming different images from one side of the media, a thermal transfer ink layer for forming a first image is provided on a transparent support, a metal vapor deposition film is provided as a concealing layer thereon, and a second layer is formed thereon. A thermal transfer ink layer for forming a second image is provided (Patent Document 1).

  However, images created by this method can be arranged so that the printed surface is protected by the support. However, this method uses a thermal transfer method, so it lacks color gradation and is smooth and rich. It has the disadvantage that color reproduction is not possible.

  Furthermore, this method loses the characteristic that the support is transparent, obstructs visual information such as scenery and images in the background of the support, and decorates the scenery and images in the background with rich expression methods. An image cannot be formed on the support.

JP-A-10-181230

  The present invention has been made in consideration of such circumstances, and selects a different image that can be viewed correctly from the front and back directions, and an image that expresses the scenery and images on the background of the transparent substrate in an expressive manner. It is an object of the present invention to provide an image forming body that can be formed automatically and a manufacturing method thereof.

As a means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that the first dye-dyed layer, the white hiding layer, the second dye-dyed layer, and the protection are formed on one surface of the transparent substrate. An image forming body formed by sequentially laminating layers,
Forming a first image on the first dye-dyed layer and a second image on the second dye-dyed layer, respectively, with a sublimable dye;
A region where the first image can be observed from one surface of the transparent substrate, and the second image can be observed from the other surface of the transparent substrate;
An image forming body characterized in that a region where the first image and the second image can be observed simultaneously from one surface of a transparent substrate is mixed.

  The invention according to claim 2 is the image forming body according to claim 1, wherein an adhesive layer is laminated on the protective layer.

  The invention described in claim 3 is characterized in that the first dye dyeing layer and the white hiding layer are made of a binder resin, and the binder resin contains the same kind of thermoplastic resin. Or it is an image forming body of 2.

According to a fourth aspect of the present invention, there is provided a sublimable dye receptor having a first dye-dyed layer formed on one side of a transparent substrate, and a first image formed on one side of a support. A thermal head using a dye layer for image forming, a laminate of a second dye dyeing layer and a white hiding layer, a second image forming dye layer, and an image forming medium in which a protective layer is formed in a surface sequential manner. An image forming method for forming an image by heating, comprising: an upper surface of a first dye-dyed layer of the sublimable dye receiver; and an upper surface of a first image-forming dye layer of the image-forming medium. Overlapping and facing, heated with a thermal head from the support side to transfer the sublimation dye to the first dye dyeing layer to form the first image,
The laminate of the second dye dye layer and the white hiding layer is selectively transferred onto the first image by heating with a thermal head,
Next, the upper surface of the first dye-dyed layer or the second dye-dyed layer and the upper surface of the second image-forming dye layer of the image-forming medium are overlapped to face each other, from the support side. A second image is formed by transferring the sublimation dye to the first dye dye layer or the second dye dye layer by heating with a thermal head,
Furthermore, the protective layer of the image forming medium is superposed on the entire surface of the first dye dyeing layer or the second dye dyeing layer, and the protective layer is laminated by heating with a thermal head. An image forming method.

  According to the first aspect of the present invention, since the first and second images are respectively provided on the upper and lower sides of the transparent base material on the one surface of the transparent base material, the other side of the transparent base material is provided. The first image can be observed from the surface side, and the second image can be observed from the one surface side. Further, by forming the first and second images differently, different images can be observed on the front and back of the transparent substrate, and an image forming body having a new design can be provided.

  Alternatively, by providing a region where the white hiding layer is not selectively applied, the first or second image and the image in the background can be superimposed and observed. Furthermore, by using a sublimable dye for image formation, gradation expression can be imparted to the image, and an image forming body having excellent design properties with more expressive power can be provided.

Further, according to claim 2, by providing an adhesive layer on the protective layer, it can be easily bonded to a transparent transfer object. For example, the transparent transfer object has a curved surface. Even different images can be displayed on the front and back.

  According to a third aspect of the present invention, the binder resin constituting the first dye dyeing layer and the white hiding layer contains the same kind of thermoplastic resin, so that the first dye dyeing is performed by heat transfer with a thermal head. Compatibility between the layer and the white hiding layer is increased, and adhesion between the two layers is improved. Thereby, an image forming body having high reliability can be provided.

  Further, according to claim 4, a sublimable dye receiver having a first dye-dyed layer formed on one surface of a transparent substrate, and a first image-forming dye on one surface of a support. Layer, a laminate of a second dye dyeing layer and a white hiding layer, a second image forming dye layer, and an image forming medium in which a protective layer is formed in a surface sequential manner, whereby the first dye is used. Thermally, from forming an image on the dyed layer, selectively forming a white hiding layer, forming an image on the second dye dyed layer or on the first dye dyed layer, and even forming a protective layer All these steps can be easily performed by the head.

  As described above, according to the present invention, the images formed on the front and back of the transparent substrate can be viewed correctly from the front and back directions, and the background and the background can be decorated with a rich expression method. An image forming body capable of selectively forming an image and a manufacturing method thereof can be provided.

1 is a schematic cross-sectional view showing an embodiment of an image forming body of the present invention. 1 is a schematic cross-sectional view showing an embodiment of an image forming body of the present invention. (A) It is a section schematic diagram showing one embodiment of a sublimation dye receiver concerning the present invention, and (b) It is a section schematic diagram showing one embodiment of an image forming medium concerning the present invention. It is a cross-sectional schematic diagram showing one embodiment of a manufacturing process of an image forming body of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of an image-forming body of the present invention. On one side of a transparent substrate 1, a first dye-dyed layer 2, a white hiding layer 4, and a second dye-dyed An image forming body in which a layer 5 and a protective layer 7 are selectively and sequentially laminated, the first image 3 on the first dye-dyed layer 2 and the second dye-dyed layer 5 The second images 6 are each formed from a sublimable dye, and the second image 6 is observed from one surface side of the transparent substrate 1 and the first image 3 is observed from the other surface side.

  Further, the first image 3 and the second image 6 are formed from the sublimation dye on the first dye-stained layer 2, and these images and the background or image on the back surface of the transparent substrate 1 are overlapped and observed. Is done. Thus, the image forming body of the present invention can selectively form two different regions.

  FIG. 2 shows another embodiment of the image forming body of the present invention. By providing an adhesive layer 8 on the protective layer 7, it can be easily bonded to a transparent transfer body, For example, different images can be displayed on the front and back surfaces of a structure in which a transparent transfer target has a curved surface.

  FIG. 3 shows the structure of the sublimable dye receiver 10 and the image forming medium 20, and FIG. 4 shows the manufacturing process of the image forming body.

<Sublimation dye receptor>
As shown in FIG. 3A, the sublimable dye receiver 10 according to the present invention has a first dye dyeing layer 2 formed on a transparent substrate 1.

  The transparent substrate 1 used in the present invention is not particularly limited as long as it has heat resistance and mechanical strength that can withstand heat processing by a thermal head in addition to light transmittance. Examples thereof include synthetic resins such as glass, polyester, polyarylate, polyurethane, polyimide, cellulose derivative, polyethylene, and acrylic. Among these, a polyethylene terephthalate film (hereinafter referred to as PET film) is preferable.

  The first dye-dyed layer 2 includes polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymers, ethylene / acetic acid. Vinyl copolymers, vinyl polymers such as polyacrylic esters, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene and propylene and other vinyl monomers, cellulose resins such as ionomers and cellulose diacetate, Examples include a layer made of polycarbonate or the like. Particularly preferred is a vinyl chloride / vinyl acetate copolymer layer.

<Image forming medium>
As shown in FIG. 3B, the image forming medium 20 according to the present invention has a first image forming dye layer 9 a, a second dye dyeing layer 5, and a white color on one surface of the substrate 11. A laminate with the hiding layer 4, the second image forming dye layer 9b, and the protective layer 7 are formed in the surface order. In addition, sensor marks (not shown) relating to each layer for determining the image forming position are formed.

  Since the base material 11 is required to have heat resistance and strength that is not softened and deformed by heat pressure in thermal transfer, for example, polyethylene terephthalate, polyethylene naphthalate, polypropylene, cellophane, acetate, polycarbonate, polysulfone, polyimide, polyvinyl alcohol, aromatic polyamide. , Synthetic resin films such as aramid and polystyrene, and papers such as condenser paper and paraffin paper can be used alone or in combination.

  Among these, a polyethylene terephthalate film is preferable in view of physical properties, workability, cost, and the like. Further, the thickness can be in the range of 2 to 50 μm in consideration of operability and workability, but in consideration of handling properties such as transfer suitability and workability, the thickness is about 2 to 12 μm. preferable.

  Although not shown in FIG. 3, it is preferable to provide a heat-resistant layer on the other surface of the substrate 11 (opposite the surface on which the second dye dyeing layer 5 and the like are formed). The heat-resistant layer is composed of, for example, a functional additive that imparts releasability and slipperiness, and a binder, and can be cured with a curing agent as necessary. The thickness of the heat-resistant layer is preferably about 0.1 to 2 μm, although it depends on the material configuration used.

  Examples of heat-resistant layers include acrylic oligomer UV-cured products, polyesters, polyurethanes, polyacetals, polyamides, polyimides, and other synthetic resins with silicone oil and other release agents added, and silicones copolymerized. be able to.

  Moreover, even if it adds a filler as needed, there is no problem, and examples of the filler to be added include silicone powder, silica, and various resin powders.

  The first image-forming dye layer 9a and the second image-forming dye layer 9b are usually made of yellow, magenta, and yellow by an ink containing a sublimation dye in order to express full color gradation. It is divided into three color areas of cyan and is formed in a surface sequential manner.

  The first dye dye layer 2 and the second dye dye layer 5 are composed of at least a sublimable dye and a binder, and a thickness of about 1 μm (dry thickness) is appropriate. Black can be represented by transferring these three colors so as to overlap each other.

  Examples of the sublimable dye used in the present invention include yellow (Y) components such as Solvent Yellow 56, 16, 30, 93, 33, Disperse Yellow 201, 231, 33, and the like. As the magenta (M) component, C.I. I. Disperse thread 60, C.I. I. Disperse violet 26, C.I. I. Solvent Red 27, or C.I. I. Solvent Red 19 etc. are mentioned.

  As the cyan (C) component, C.I. I. Disperse Blue 354, C.I. I. Solvent Blue 63, C.I. I. Solvent Blue 36, or C.I. I. Disperse Blue 24 and the like.

  Examples of the binder include cellulose resins such as ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, and cellulose acetate, and polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl pyrrolidone, and polyacrylamide. Vinyl resins, polyester resins, styrene-acrylonitrile copolymer resins, phenoxy resins, and the like can be used.

  Furthermore, reactive resins such as phenol, melamine, epoxy, isocyanate, and glyoxal resin can be used as the curable resin.

  Next, the white hiding layer 4 will be described. Although the white concealment layer 4 is not shown in FIG. 3, the concealment for preventing interference between the white layer as the base of the image and two overlapping images (the first image 3 and the second image 6 shown in FIG. 1). Composed of layers.

  The white hiding layer 4 is mainly composed of a white pigment and a binder resin. Examples of white pigments include titanium oxide and zinc oxide. Titanium oxide includes rutile type titanium oxide and anatase type titanium oxide, but either type may be used.

  In addition, a filler can be used as an additive for the white hiding layer 4, for example, inorganic fillers such as silica, alumina, clay, talc, calcium carbonate, barium sulfate, acrylic resin, epoxy resin, polyurethane resin, phenol Examples thereof include resin particles (plastic pigment) such as resin, melamine resin, benzoguanamine resin, fluorine resin, and silicone resin.

  Any resin may be used as the binder resin, and examples thereof include acrylic resins, cellulose resins, polyester resins, vinyl resins, polyurethane resins, polycarbonate resins, and partially cross-linked resins thereof. Above all, for the purpose of improving the adhesion between the first dye dye layer 2 and the second dye dye layer 5, the same vinyl chloride / vinyl acetate copolymer as the resin used for the dye dye layer is used. Coalescence is preferred.

  The concealing layer can be formed by applying a concealing pigment such as carbon black or an Al pigment and a coating liquid composed mainly of a binder.

As the pigment, Al pigments such as carbon black, aluminum oxide, and aluminum hydroxide are preferably used because of their high hiding properties. Examples include inorganic pigments such as clay, calcined kaolin, and bronze powder, and organic pigments such as styrene microballs, nylon powder, polyethylene powder, phthalocyanine, and metal salts of phthalocyanine.

  The binder resin is not particularly limited, and examples thereof include acrylic resins, cellulose resins, polyester resins, vinyl resins, polyurethane resins, and polycarbonate resins.

  In addition to the pigment and binder, an additive may be added to the coating liquid for forming the concealing layer, if necessary. As a method for coating, a conventionally known method, for example, gravure coating, gravure reverse coating, roll coating or the like can be used, and the coating amount is preferably about 2 to 30 μm at the time of drying.

  Examples of the second dye dyeing layer 5 include polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymers, and ethylene / acetic acid. Vinyl copolymers, vinyl polymers such as polyacrylic esters, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene and propylene and other vinyl monomers, cellulose resins such as ionomers and cellulose diacetate, Examples include a layer made of polycarbonate or the like. Particularly preferred is a vinyl chloride / vinyl acetate copolymer layer.

  The protective layer 7 is formed on the entire surface of the dye-dyed layer 5 on which the second image 6 is formed, and imparts durability from ultraviolet rays or the like. At the same time, since it needs to be formed on the transferred body by a process called a thermal transfer method, in general, it has both the original performance as a protective layer such as ultraviolet absorption and adhesiveness to the transferred body. It is necessary.

  The protective layer 7 is composed of a functional additive such as an ultraviolet absorber and a binder resin. Examples of functional additives include benzophenone, benzotriazole, benzoate, UV absorbers typified by triazines, light stabilizers typified by hindered amines, antioxidants typified by hindered phenols, and fluorescent enhancement. A white agent, an antistatic agent, etc. can be mentioned.

  The binder resin is not particularly limited as long as it has heat melting properties. For example, styrene resins such as polystyrene and poly-α-methylstyrene, acrylic resins such as polymethyl methacrylate, and polyethyl acrylate. Resin, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polyvinyl acetal and other vinyl resins, polyester resin, polyamide resin, epoxy resin, polyurethane resin, petroleum resin, ionomer, ethylene- Synthetic resins such as acrylic acid copolymer, ethylene-acrylic acid ester copolymer, cellulose derivatives such as nitrocellulose, ethyl cellulose, cellulose acetate propionate, rosin, rosin-modified maleic acid resin, ester gum, polyisobutylene rubber, butyl Beam, styrene - acrylonitrile rubbers, natural resins and derivatives of synthetic rubber polychlorinated olefins such as carnauba wax, waxes such as paraffin wax - butadiene rubber, butadiene. Among these, acrylic resins, polyesters, and epoxy resins are preferable.

  Further, the protective layer 7 can be constituted by a laminate composed of a plurality of layers, and can be provided with a peeling function for easily peeling from the substrate and transferring it to the transfer target. As a constituent material of the release layer imparting this release function, for example, a functional additive imparting releasability and slipperiness, a binder resin, and the like are used, and the thickness of the layer is about 0.3 to 3 μm (dry Thickness) is appropriate.

  Next, the manufacturing method of the image forming body according to the present invention will be described based on FIG.

  The image forming body of the present invention can be obtained by transferring a dye to a dye dyeing layer using the thermal energy of a thermal head found in a general sublimation printer.

  As shown in FIG. 4A, first, the first dye dyeing layer 2 is formed on one surface of the transparent substrate 1. As a forming method, the ink composition for forming the first dye dyeing layer 2 is applied by a known coating method, for example, by a gravure coating method, and dried to obtain a sublimable dye receptor 10. Make it.

  Next, the first image-forming dye layer 9a and the first dye-dyed layer 2 of the sublimation dye receiver 10 are opposed to each other by using the separately formed image-forming medium 20 shown in FIG. Then, the first image 3 is formed (dyed) on the first dye-dyed layer 2 of the sublimable dye receiver 10 with a thermal head.

  Next, as shown in FIG. 4C, the first dye-dyed layer 2 of the sublimable dye receiver 10 on which the first image 3 has been formed, the white hiding layer 4 of the image-forming medium 20, and the first The white dyeing layer 5 and the second dyeing layer 5 are stacked on the first dyeing layer 2 of the sublimable dye receiver 10 with a thermal head. Using the white hiding layer 4 as a lower layer, the entire surface or selectively thermal transfer is performed. At this time, a release layer may be provided between the base material 11 and the second dye dyeing layer 5 in order to facilitate peeling from the base material 11.

  The white hiding layer 4 thus formed preferably has a transmittance of 20% or less in the wavelength region of 400 to 700 nm, whereby the first image formed on the lower side of the white hiding layer 4 Becomes invisible from the upper side of the white hiding layer 4.

  Next, as shown in FIG. 4D, the second image forming dye layer 9b of the image forming medium 20 is opposed to the second dye dyeing layer 5 formed on the transparent substrate 1. Overlap, a second image 6 is formed (dyed) on the first dye dyed layer 2 and the second dye dyed layer 5 with a thermal head.

  Next, as shown in FIG. 4E, a protective layer 7 thermally transferred by a thermal head is formed on the entire surface including the second image formed above (image forming region of the transparent substrate 1). The image forming body of the invention can be manufactured.

  The image forming body produced in this manner has the first image 3 from the other surface side of the transparent substrate 1 and the second image from the one surface side by interposing the white hiding layer 4, respectively. Can be observed independently without obstructing the image.

  As described above, the present invention forms a first image 3 by dyeing a sublimable dye on the first dye-dyed layer 2 on the transparent substrate 1, and entirely or selectively concealing the white. The layer 4 and the second dye-dyed layer 5 are transferred, and the second image 6 is formed by dyeing the sublimation dye again, and the protective layer 7 is further formed so that the reflected light is reflected on the transparent substrate. It is an image forming body that can have different images on the front and back sides that are used, and an image that can be observed by superimposing a background image that makes use of the characteristics of a transparent substrate, and a method for manufacturing the same.

  This makes it possible to form different images on the front and back of the image viewed using reflected light through the white hiding layer without greatly changing the configuration of the conventional sublimation printer. As a result, it is possible to easily form a variety of printed materials and to further expand the development of designs using a transparent substrate.

The present invention can be used for interior and exterior materials having a function as a partition board having different design properties on the front and back sides, through the white hiding layer, in images viewed using reflected light. it can.

DESCRIPTION OF SYMBOLS 1 ... Transparent base material 2 ... 1st dye dyeing layer 3 ... 1st image 4 ... White hiding layer 5 ... 2nd dye dyeing layer 6 ... 2nd Image 7 ... protective layer 8 ... adhesive layer 9a ... first image forming dye layer 9b ... second image forming dye layer 10 ... sublimation dye receptor 11 ... .Base material 20 ... image forming medium

Claims (4)

An image forming body obtained by selectively laminating a first dye-dyed layer, a white hiding layer, a second dye-dyed layer, and a protective layer sequentially on one surface of a transparent substrate,
Forming a first image on the first dye-dyed layer and a second image on the second dye-dyed layer, respectively, with a sublimable dye;
A region where the first image can be observed from one side of the transparent substrate, and the second image can be observed from the other side of the transparent substrate;
An image forming body characterized in that a region in which the first image and the second image can be observed simultaneously from one side of a transparent substrate is mixed.   The image forming body according to claim 1, wherein an adhesive layer is laminated on the protective layer.   3. The image forming body according to claim 1, wherein the first dye-dyed layer and the white hiding layer are made of a binder resin, and the binder resin contains the same kind of thermoplastic resin. A sublimable dye receiver having a first dye dye layer formed on one side of a transparent substrate, and a first image forming dye layer and a second dye dye layer on one side of a support. Image forming method in which an image is formed by heating with a thermal head using an image forming medium in which a laminated body of a white hiding layer, a second image forming dye layer, and a protective layer are formed in a surface sequential manner. There,
The upper surface of the first dye-dyed layer of the sublimation dye receiver and the upper surface of the first image-forming dye layer of the image-forming medium are overlapped with each other and heated from the support side with a thermal head. A sublimable dye is transferred to the first dye-dyed layer to form a first image,
The laminate of the second dye dye layer and the white hiding layer is selectively transferred onto the first image by heating with a thermal head,
Next, the upper surface of the first dye-dyed layer or the second dye-dyed layer and the upper surface of the second image-forming dye layer of the image-forming medium are overlapped to face each other, from the support side. A second image is formed by transferring the sublimation dye to the first dye dye layer or the second dye dye layer by heating with a thermal head,
Furthermore, the protective layer of the image forming medium is superposed on the entire surface of the first dye dyeing layer or the second dye dyeing layer, and the protective layer is laminated by heating with a thermal head. Image forming method.

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