JP4998384B2 - Hologram thermal transfer device and method for manufacturing hologram laminate - Google Patents

Description

  The present invention relates to a hologram thermal transfer apparatus that can thermally transfer a hologram transfer foil to a transfer medium without generating burrs, and a method for manufacturing a hologram laminate.

  Currently, securities such as checks and gift certificates, passbooks, passports, ID cards and other ID cards, and forgery of banknotes are increasing, and the damage is enormous. For this reason, an image forming method using a hologram has been conventionally employed. The hologram has a feature that the appearance of the image changes depending on the viewing angle, and cannot be duplicated by a monochrome copying machine (color copying machine), and therefore has a relatively high security.

  However, in recent years, even for relief holograms, which are typical examples of holograms, the fact is that counterfeit products (imitation products) are on the market. As a hologram using a principle different from the relief type hologram, a volume type hologram can be mentioned. Volume holograms form images using a special photosensitive material using a laser, and are therefore considered to have higher security than relief holograms. In recent years, they are expected to be used as anti-counterfeiting means. .

  In general, a plurality of materials having different refractive indexes are used for the volume hologram, and usually a photopolymerizable material that can be polymerized by irradiating with specific light is used. For this reason, it is generally known that volume holograms tend to have high mechanical strength. Further, volume holograms tend to increase the thickness of the layer on which the hologram is formed due to the fact that the hologram image is recorded by the three-dimensional arrangement of the refractive index differences. For this reason, when transferring using the volume hologram transfer foil, the foil cutting property is poor compared to the relief hologram transfer foil, and the volume hologram transfer foil remains on the transfer medium beyond the transfer area range. Defects such as burrs are likely to occur.

In order to solve such a problem of burrs of the transfer foil, an image forming apparatus provided with a blade capable of cutting burrs is disclosed (see Patent Document 1). The burrs remaining on the transfer target after the transfer and peeling process are cut by a blade, and the cut burrs are swept away by a brush and cleaned up.
Japanese Patent Laid-Open No. 11-58882

  However, in the prior art disclosed in Patent Document 1, since the burrs are cut after the transfer and peeling process, a foil residue is generated. For this reason, equipment for removing the foil residue is provided. In normal transfer foils and relief hologram transfer foils, the foil residue obtained by cutting burrs is very small, so it is easy to remove the foil residue. Since it is large, it is difficult to remove the foil residue with the removal equipment disclosed in Patent Document 1. Accordingly, there is a problem that a further large scale waste removal facility is required, which complicates the configuration of the thermal transfer apparatus and increases the cost.

  The present invention has been made in consideration of the above points, and provides a hologram thermal transfer apparatus and a method for manufacturing a hologram laminate, which can easily transfer a hologram transfer layer to a transfer medium without generating burrs. The purpose is to provide.

  According to the present invention, a hologram transfer foil having a base material and a hologram transfer layer including at least a volume hologram layer and a transfer medium are sandwiched between the receiving roller and the receiving roller, and the hologram transfer layer is heated. A heating roller that is pressed and thermocompression-bonded to a transfer medium, and a hologram transfer layer that is provided on the downstream side of the receiving roller and the heating roller and peels the base material of the hologram transfer foil from the hologram transfer layer, Separated from the other hologram transfer layers, a peeling member that has a predetermined shape and includes at least a volume hologram layer is formed on the transfer medium, and is provided on the downstream side of the peeling member and is thermocompression bonded. A transfer foil take-up roll for taking up the hologram transfer foil after the hologram transfer layer is separated, and a hologram lamination provided on the downstream side of the peeling member And a control unit that controls at least one of the transfer foil winding roll and the carry-out mechanism, and the control unit includes a trailing edge of the hologram laminate in the hologram transfer foil. When the portion corresponding to the separation member reaches the peeling member, control the at least one of the transfer foil take-up roll and the carry-out mechanism to control the movement speed of the hologram transfer foil by the transfer foil take-up roll. The hologram thermal transfer apparatus is characterized in that it is faster than the speed.

  In the present invention, the carry-out mechanism conveys the transfer medium at a constant moving speed from the upstream side to the downstream side of the peeling member, and the control unit corresponds to the rear edge of the hologram laminate in the hologram transfer foil. The hologram thermal transfer apparatus is characterized in that when the transfer member reaches the peeling member, the transfer foil winding roll is controlled so that the moving speed of the hologram transfer foil by the transfer foil winding roll is faster than the moving speed of the transfer medium. is there.

  In the present invention, the transfer foil winding roll winds the hologram transfer foil from the upstream side to the downstream side of the peeling member at a constant moving speed, and the control unit is arranged at the trailing edge of the hologram laminate in the hologram transfer foil. The hologram thermal transfer apparatus is characterized in that when the corresponding portion reaches the peeling member, the unloading mechanism is controlled so that the moving speed of the medium to be transferred by the unloading mechanism is slower than the moving speed of the hologram transfer foil.

  The present invention provides a step of preparing a hologram transfer foil having a base material and a hologram transfer layer including at least a volume hologram layer, and the hologram transfer foil is directed to a transfer medium so that the hologram transfer layer faces the transfer medium. A step of stacking, a step of heat-pressing the hologram transfer foil to the transfer medium between the receiving roller and the heating roller, and thermocompression bonding the hologram transfer layer to the transfer medium; The hologram transfer layer peeled off from the transfer layer and thermally bonded is separated from the other hologram transfer layers to form a hologram laminate having a predetermined shape and including at least a volume hologram layer on the transfer medium. The process and the process of winding the hologram transfer foil after the thermocompression-bonded hologram transfer layer is separated by a transfer foil winding roll And a step of carrying out the medium to be transferred on which the hologram laminate is formed by a carry-out mechanism, and when the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, the transfer foil is wound up. A method for manufacturing a hologram laminate, comprising: controlling at least one of a roll and a carry-out mechanism to make a moving speed of a hologram transfer foil by a transfer foil winding roll faster than a moving speed of a medium to be transferred by a carry-out mechanism. is there.

  According to the present invention, in the step of carrying out the medium to be transferred by the carry-out mechanism, the carry-out mechanism conveys the medium to be transferred at a constant moving speed from the upstream side to the downstream side of the peeling member, and the hologram lamination of the hologram transfer foils When the portion corresponding to the rear edge of the body reaches the peeling member, the transfer foil winding roll is controlled so that the moving speed of the hologram transfer foil by the transfer foil winding roll is faster than the moving speed of the transfer medium. A method for producing a hologram laminate, characterized in that

  In the present invention, in the step of winding the hologram transfer foil by the transfer foil winding roll, the transfer foil winding roll winds the hologram transfer foil from the upstream side to the downstream side of the peeling member at a constant moving speed, When the portion of the transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, the transfer mechanism is controlled so that the moving speed of the medium to be transferred by the unloading mechanism is slower than the moving speed of the hologram transfer foil. A method for producing a hologram laminate, characterized in that

  According to the present invention, when the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, the transfer foil winding is controlled by controlling at least one of the transfer foil winding roll and the carry-out mechanism. The moving speed of the hologram transfer foil by the roll is made faster than the moving speed of the transfer medium by the carry-out mechanism. As a result, the portion of the hologram transfer layer that is not thermocompression-bonded to the transfer medium moves vigorously with the substrate in the direction away from the transfer medium. Therefore, stress concentrates on a portion of the hologram transfer layer corresponding to the rear edge of the hologram laminate, and the thermocompression-bonded hologram transfer layer can be accurately separated from the other hologram transfer layers. For this reason, it is possible to form a hologram stack with good accuracy without burrs on the transfer medium.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a diagram illustrating a configuration of a transfer medium (hologram product) on which a hologram laminate is formed, and FIG. 2 is a diagram illustrating a configuration of a hologram transfer foil. FIG. 3 is a diagram showing a hologram thermal transfer apparatus according to an embodiment of the present invention, and FIGS. 4 and 5 show a process of thermally transferring a hologram transfer layer to a transfer medium in the embodiment of the present invention. FIG. FIG. 6 is a diagram showing a hologram laminate formed on a transfer medium in one embodiment of the present invention. FIG. 7 is a schematic view showing the vicinity of the peeling bar when separating the thermocompression-bonded hologram transfer layer from the other hologram transfer layers. FIG. 8 is a view showing a comparative example in which burrs are generated on the transfer medium, and FIG. 9 is a view showing a configuration of a hologram transfer foil in a modified example of the present embodiment.

Hologram Laminate and Hologram Transfer Foil First, referring to FIGS. 1 and 2, a hologram laminate formed by a hologram laminate production method and a hologram thermal transfer apparatus according to the present invention, and a hologram transfer foil used for forming a hologram laminate Will be described.

  First, with reference to FIG. 1, the structure of the hologram laminate 40 formed by the hologram laminate manufacturing method and the hologram thermal transfer apparatus according to the present embodiment will be described. As shown in FIG. 1, the hologram product 40 includes (after completion) securities such as banknotes, stock certificates, checks, and identification documents such as passbooks, passports, and ID cards. 14 and a hologram laminate 22 provided on the transfer medium 14.

  Among these, the transfer medium 14 includes, for example, paper such as banknotes, stock certificates, and checks, booklets made of paper such as plastic film, passbook, and passport, and plastic, ID cards, cards such as bank cards, and the like. In particular, when the transfer medium 14 is relatively thin, such as paper or plastic film, the volume hologram stack can be formed without damaging the transfer medium 14 by using the volume hologram laminate manufacturing method and the hologram thermal transfer apparatus according to the present invention. Since the body 22 can be formed on the transfer medium 14, the present invention is effective. In particular, when the transfer medium is a booklet, even if a page is bent or distorted, the product value is lost. However, according to the present invention, the booklet can be effectively prevented from being deformed or damaged. is there.

  The hologram laminate 22 has a predetermined planar shape, and includes an adhesive layer 27 disposed on the transfer medium 14, a volume hologram layer 26 disposed on the adhesive layer 27, and a volume type. And a peelable protective layer 25 disposed on the hologram layer 26.

  Among these, the peelable protective layer 25 is made of, for example, acrylic and methacrylic resins such as polymethyl acrylate and polymethyl methacrylate, polyvinyl chloride resin, cellulose resin, silicone resin, chlorinated rubber, casein, various surfactants, metal oxides It consists of one kind or a mixture of two or more of things. As will be described later, the peelable protective layer 25 is peeled off by heat applied from the heating roller 11, whereby the hologram transfer layer 24 is peeled from the base material 23 of the hologram transfer foil 18. The thickness of the peelable protective layer 25 is, for example, about 1 micrometer (1 μm).

  The constituent material of the volume hologram layer 26 is not particularly limited as long as it can record a volume hologram, and any material generally used for a volume hologram can be arbitrarily used. Examples of such materials include known volume hologram recording materials such as silver salt materials, dichromated gelatin emulsions, photopolymerizable resins, and photocrosslinkable resins. Since the volume hologram layer 26 is manufactured by recording laser interference fringes on such a material, the volume hologram layer 26 is made of a volume hologram that is difficult to replicate and is unlikely to be counterfeited. The thickness of the volume hologram layer 26 can be adjusted as appropriate, but is usually in the range of about 1 micrometer (1 μm) to 50 micrometers (50 μm), preferably the lower limit is 3 micrometers (3 μm). The upper limit is 25 micrometers (25 μm) or less.

  The adhesive layer 27 has a function of bonding the transfer medium 14 and the volume hologram layer 26. The adhesive layer 27 may be formed of any material, but is preferably heat-adhesive, and for example, a thermoplastic resin is used. Examples of the thermoplastic resin include maleic acid-modified vinyl chloride-vinyl acetate copolymer resin, ethylene-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate copolymer resin, polyamide resin, polyester resin, polyethylene resin, ethylene-isobutyl acrylate. Copolymer resin, butyral resin, polyvinyl acetate and its copolymer resin, ionomer resin, acid-modified polyolefin resin, acrylic / methacrylic (meth) acrylic resin, acrylic ester resin, ethylene ) Acrylic acid copolymer, ethylene / (meth) acrylic acid ester copolymer, polymethyl methacrylate resin, cellulose resin, polyvinyl ether resin, polyurethane resin, polycarbonate resin, polypropylene resin, epoxy resin, phenol resin , Vinyl resin, maleic resin, alkyd resin, polyethylene oxide resin, urea resin, melamine resin, melamine alkyd resin, silicone resin, rubber resin, styrene butadiene styrene block copolymer (SBS), styrene isoprene styrene block co One type or two or more types of polymers (SIS), styrene ethylene butylene styrene block copolymers (SEBS), styrene ethylene propylene styrene block copolymers (SEPS) and the like can be mentioned.

  In the adhesive layer 27, it is possible to add a dispersant, a filler, a plasticizer, an antistatic agent, or the like as an additive. The thickness of the adhesive layer 27 is not particularly limited and can be set as appropriate, but is usually in the range of about 0.3 micrometers (0.3 μm) to 50 micrometers (50 μm), Preferably, the lower limit is 0.5 micrometers (0.5 μm) or more, and the upper limit is 25 micrometers (25 μm) or less. When the thickness is within the above range, the adhesiveness of the adhesive layer 27 is improved and the heating time can be shortened.

  By the way, as shown in FIG. 1, the hologram laminate 22 includes a front edge 37 located at the front portion of the hologram laminate 22 and a rear edge located at the rear portion of the hologram laminate 22 with respect to the transport direction of the transfer medium 14. 28. On the other hand, the transfer medium 14 has a front edge 43 located at the front part of the transfer medium 14 and a rear edge 44 located at the rear part of the transfer medium 14 with respect to the transport direction of the transfer medium 14. Yes.

  Further, as shown in FIG. 1, the front edge 37 of the hologram laminate 22 is positioned on substantially the same vertical line as the front edge 43 of the transfer medium 14. Similarly, the rear edge 28 of the hologram laminate 22 is positioned on substantially the same vertical line as the rear edge 44 of the transfer medium 14. Note that “substantially the same” means a range that does not lose the spirit of the present invention and includes a range close to the same. However, the present invention is not limited to this, and the front edge 37 of the hologram laminate 22 may be located on the inner side of the front edge 43 of the transfer medium 14, and the rear edge 28 of the hologram laminate 22 is transferred to the transfer medium 14. It may be located inside the rear edge 44.

  Next, the hologram transfer foil 18 used for forming the hologram laminate 22 will be described with reference to FIG.

  The hologram transfer foil 18 includes a base material 23 and a hologram transfer layer 24 as shown in FIG.

  Among these, the base material 23 consists of polyethylene terephthalate, for example, The thickness is about 25 micrometers (25 micrometers), for example.

  The hologram transfer layer 24 includes a peelable protective layer 25, a volume hologram layer 26, and an adhesive layer 27 that are sequentially arranged from the substrate 23 side. Since each material of the peelable protective layer 25, the volume hologram layer 26, and the adhesive layer 27 is the same as that of the hologram laminate 22, detailed description thereof is omitted.

Hologram Thermal Transfer Device Next, the hologram thermal transfer device 50 will be described with reference to FIG. The hologram thermal transfer device 50 is provided facing the receiving roller 10 and the receiving roller 10. The hologram transfer foil 18 and the transfer medium 14 are sandwiched between the receiving roller 10 and the hologram on the hologram transfer foil 18. A heating roller 11 is provided that heat-presses the transfer layer 24 and thermocompression-bonds to the transfer medium 14.

  Further, on the downstream side of the receiving roller 10 and the heating roller 11, the base material 23 of the hologram transfer foil 18 is peeled from the hologram transfer layer 24, and the hologram transfer layer 24 thermocompression bonded to the transfer medium 14 is transferred to other holograms. A peeling bar (peeling member) 16 that separates from the transfer layer 24 is provided. In the release bar 16, a hologram laminate 22 having a predetermined planar shape and including an adhesive layer 27, a volume hologram layer 26, and a peelable protective layer 25 is formed on the transfer medium 14. The

  A transfer foil supply roll 15 for supplying the hologram transfer foil 18 is provided on the upstream side of the receiving roller 10 and the heating roller 11. The hologram transfer foil 18 supplied from the transfer foil supply roll 15 is conveyed to the receiving roller 10 and the heating roller 11 via the transfer foil guide roller 35.

  On the other hand, on the upstream side of the receiving roller 10 and the heating roller 11, a pair of opposed transfer medium delivery rollers 12 and 12 that send out the transfer medium 14 are provided. Further, on the downstream side of the peeling bar 16, a carry-out mechanism 19 that carries out the hologram product 40 that is the transfer medium 14 on which the hologram laminate 22 is formed is provided.

  In FIG. 3, the carry-out mechanism 19 has a pair of carry-out rollers 13 and 13 that sandwich the hologram product 40. However, the present invention is not limited to this, and the carry-out mechanism 19 is not limited to one having a roller as long as it has a function of carrying out the hologram product 40 from the receiving roller 10 and the heating roller 11.

  Further, on the downstream side of the peeling bar 16 and above the peeling bar 16, the base material 23 separated by the peeling bar 16 in the hologram transfer foil 18 and a part of the hologram transfer layer 24 remaining on the base material 23. A transfer foil winding roll 17 is provided.

  The hologram transfer foil 18 and the transfer medium 14 are conveyed toward the peeling bar 16 after passing between the receiving roller 10 and the heating roller 11. The hologram transfer foil 18 conveyed in the horizontal direction from between the receiving roller 10 and the heating roller 11 changes its direction at the position of the peeling bar 16 and moves upward from the peeling bar 16 in the vertical direction. On the other hand, the transfer medium 14 conveyed in the horizontal direction from between the receiving roller 10 and the heating roller 11 is conveyed in the horizontal direction from the peeling bar 16 as it is.

  Furthermore, the hologram thermal transfer device 50 includes a control unit 60 that controls and drives the receiving roller 10, the heating roller 11, the transfer medium delivery roller 12, the transfer foil supply roll 15, the transfer foil winding roll 17, and the carry-out mechanism 19. is doing.

  The heating roller 11 can also move in the vertical direction. As a result, the front edge 37 of the hologram laminate 22 can be formed inside the front edge 43 of the transfer medium 14. Similarly, the trailing edge 28 of the hologram laminate 22 can be formed inside the trailing edge 44 of the transfer medium 14.

The control unit 60 controls the transfer foil take-up roll 17 and the carry-out mechanism 19, respectively, so that the winding speed (movement speed) V ₁ of the hologram transfer foil 18 by the transfer foil take-up roll 17 and the object to be covered by the carry-out mechanism 19 it can be changed freely and the moving speed V ₂ of the transfer medium 14 independently.

Method for Manufacturing Hologram Laminate Next, a thermal transfer method for the hologram transfer layer 24 will be described with reference to FIGS.

  First, as shown in FIG. 3, a transfer foil supply roll 15 around which a hologram transfer foil 18 is wound is prepared, and a tip portion (not shown) of the hologram transfer foil 18 is placed on a transfer foil guide roller 35, a receiving roller 10 and a heating roller 11. And the peeling bar 16 are sequentially fed to the transfer foil winding roll 17, and the leading end of the hologram transfer foil 18 is fixed to the transfer foil winding roll 17. On the other hand, a transfer medium 14 is prepared, and the transfer medium 14 is sent between the heating roller 11 and the receiving roller 10 from a pair of transfer medium delivery rollers 12 and 12 facing each other.

  In this way, as shown in FIGS. 3 and 4, the hologram transfer foil 18 and the transfer medium 14 are sent to between the heating roller 11 and the receiving roller 10. In the heating roller 11 and the receiving roller 10, the hologram transfer foil 18 is superposed on the transfer medium 14 so that the hologram transfer layer 24 faces the transfer medium 14.

  In this case, the hologram transfer foil 18 and the transfer medium 14 are sandwiched between the heating roller 11 and the receiving roller 10, and the hologram transfer layer 24 of the hologram transfer foil 18 is heated and pressed against the transfer medium 14 by the heating roller 11. The As a result, the hologram transfer layer 24 is thermocompression bonded to the transfer medium 14, and the peelable protective layer 25 of the thermocompression bonded hologram transfer layer 24 is peeled off by heat. The thermocompression bonded portion can be peeled from the base material 23.

  Next, as shown in FIGS. 3 and 5, when the hologram transfer foil 18 and the transfer medium 14 come to the position of the peeling bar 16, the hologram transfer foil 18 is separated from the transfer medium 14 at the peeling bar 16. . That is, as shown in FIG. 5, the base material 23 of the hologram transfer foil 18 is peeled from the hologram transfer layer 24, and the hologram transfer layer 24 that has been thermocompression bonded is separated from the other hologram transfer layers 24. In this way, the hologram laminate 22 including the adhesive layer 27 having a predetermined shape, the volume hologram layer 26, and the peelable protective layer 25 is formed on the transfer medium 14.

In this case, the hologram transfer foil 18 after being separated at the peeling bar 16 is sent out toward the transfer foil winding roll 17. During this time, the transfer foil winding roll 17 is controlled by the control unit 60 and winds the hologram transfer foil 18 at a constant winding speed (moving speed) V ₁ .

On the other hand, the hologram product 40 made of the transfer medium 14 on which the hologram laminate 22 is formed is carried out outward by the carry-out mechanism 19. During this time, the carry-out mechanism 19 is controlled by the control unit 60 and carries the transfer medium 14 at a constant carrying speed (moving speed) V ₂ .

Before the trailing edge 44 of the transfer medium 14 reaches the peeling bar 16, the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 is equal to the moving speed V _{2 of the} transfer medium 14 by the carry-out mechanism 19. (V ₁ = V ₂ ).

  In this way, the base material 23 of the hologram transfer foil 18 is separated from the hologram transfer layer 24 as described above, and the hologram transfer layer 24 that is thermocompression bonded to the transfer medium 14 is separated from the other hologram transfer layers 24. Is done. In this way, the hologram laminate 22 is formed on the transfer medium 14, and the hologram product 40 is manufactured (see FIGS. 5 and 6).

By the way, when the portion of the hologram transfer foil 18 corresponding to the trailing edge 28 of the hologram laminate 22 reaches the peeling bar 16 in the hologram laminate 22 forming step, the controller 60 controls the transfer foil winding roll 17 and The carry-out mechanism 19 is controlled so that the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 is faster than the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19 (V ₁ > V ₂ ). The operation at this time will be described in detail below.

  First, the controller 60 controls the receiving medium 10, the heating roller 11, the transfer medium feeding roller 12, the transfer foil supply roll 15, the transfer foil winding roll 17, and the carry-out mechanism 19 based on the driving rotation amount. The position of the trailing edge 44 is determined.

Next, when the trailing edge 44 of the transfer medium 14 reaches the peeling bar 16, the control unit 60 controls the transfer foil winding roll 17 and the carry-out mechanism 19 as described above to transfer the transfer foil winding roll 17. The moving speed V ₁ of the hologram transfer foil 18 is made faster than the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19 (V ₁ > V ₂ ).

At this time, the control unit 60 controls the transfer foil take-up roll 17 to rapidly increase the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil take-up roll 17 and to transfer the medium 14 to be transferred by the carry-out mechanism 19. the moving speed V ₂ of is rapidly lowered. In this case, for example, the conveyance of the transfer medium 14 by the carry-out mechanism 19 may be temporarily stopped (V ₂ = 0).

Alternatively, it may be held at a constant value without changing the moving speed V ₂ at which the unloading mechanism 19 moves the transfer medium 14 from the upstream side to the downstream side of the peeling bar 16. In this case, when the portion of the hologram transfer foil 18 corresponding to the trailing edge 28 of the hologram laminate 22 reaches the peeling bar 16, the control unit 60 controls only the transfer foil winding roll 17 to transfer the transfer foil winding. By rapidly increasing the moving speed V ₁ of the hologram transfer foil 18 by the take-off roll 17, the moving speed V ₁ is made faster than the moving speed V ₂ of the transfer medium 14.

On the other hand, the moving speed V ₁ for moving the hologram transfer foil 18 by the transfer foil winding roll 17 from the upstream side to the downstream side of the peeling bar 16 may be maintained at a constant value without changing. In this case, the control unit 60 controls only the carry-out mechanism 19 when the portion of the hologram transfer foil 18 corresponding to the trailing edge 28 of the hologram laminate 22 reaches the peeling bar 16, and the transferred object by the carry-out mechanism 19 is transferred. by rapidly lowering the moving speed V ₂ of the medium 14, the movement speed V ₂ of the transfer medium 14 slower than the moving speed V ₁ of the hologram transfer foil 18.

Thus, when the portion corresponding to the edge 28 after the hologram laminate 22 of the hologram transfer foil 18 has reached the peeling bar 16, the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 unloading mechanism 19 is made faster than the moving speed V _{2 of the} medium 14 to be transferred (V ₁ > V ₂ ), and the hologram transfer layer 24 thermocompression-bonded from the other hologram transfer layers 24 at the lower part of the peeling bar 16 with high accuracy. The hologram transfer layer 24 can be thermally transferred to the transfer medium 14 without generating burrs 29 (FIG. 8) described later (see FIG. 7).

In the case where thus increase the moving speed V ₁ of the hologram transfer foil 18 from moving speed V ₂ of the transfer medium 14, between the moving speed V ₂ of the moving speed V ₁ and the transfer medium 14 of the hologram transfer foil 18 It is preferable to provide a relatively large difference between the two. In particular, it is preferable that there is a relationship of V ₁ −V ₂ ≧ 1 mm / sec between the moving speed V ₁ of the hologram transfer foil 18 and the moving speed V ₂ of the transfer medium 14.

Thereafter, the hologram product 40 made of the transfer medium 14 having the hologram laminate 22 formed on the surface thereof is carried out outward by the carry-out mechanism 19. Thereafter, the control unit 60 returns the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 and the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19 to their original speeds. That is, the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 and the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19 are the same (V ₁ = V ₂ ).

Thus, according to the present embodiment, when the portion of the hologram transfer foil 18 corresponding to the rear edge 28 of the hologram laminate 22 reaches the peeling bar 16 in the hologram laminate 22 forming step, the transfer foil winding By controlling at least one of the take-off roll 17 and the carry-out mechanism 19, the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil take-up roll 17 is made faster than the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19. Yes. For this reason, the base material 23 of the hologram transfer foil 18 tries to move away rapidly from the rear edge 44 of the transfer medium 14 moving in the horizontal direction, and the rear edge of the hologram laminate 22 in the hologram transfer layer 24. A force is applied to the portion corresponding to 28. Thus, the thermocompression-bonded hologram transfer layer 24 can be accurately separated from the other hologram transfer layers 24 at the lower portion of the peeling bar 16, and the cover 29 can be covered without generating burrs 29 (FIG. 8) described later. The hologram transfer layer 24 can be thermally transferred to the transfer medium 14.

Next, the effect of the present invention will be described in comparison with a comparative example. That is, in the comparative example shown in FIG. 8, the winding speed (moving speed) V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 and the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19 are expressed as a hologram. The portion of the transfer foil 18 corresponding to the rear edge 28 of the hologram laminate 22 does not change before and after reaching the peeling bar 16 (that is, while maintaining the state of V ₁ = V ₂ ) on the transfer medium 14. The hologram transfer foil 18 is formed. In this case, the hologram transfer foil 18 includes the hologram transfer layer 24 including the volume hologram layer 26, and the foil transfer foil 18 has poor foil cutting properties. 29 remains. On the other hand, according to the present embodiment, as described above, the transfer foil winding roll 17 and the unloading mechanism 19 are controlled, and the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 is unloaded. By making the moving speed V ₂ of the transfer medium 14 by the mechanism 19 faster, the hologram transfer layer 24 can be thermally transferred to the transfer medium 14 without generating such burrs 29.

  Next, another modification of the present embodiment will be described with reference to FIG. That is, as shown in FIG. 9, the hologram transfer layer 24 includes a peelable protective layer 25, an ultraviolet absorbing layer 31, a volume hologram layer 26, an optically variable ink layer 32, The fluorescent image forming layer 33 and the adhesive layer 27 may be included.

  Among these, examples of the material of the ultraviolet absorbing layer 31 include an organic ultraviolet absorbent, a reactive ultraviolet absorbent, and an inorganic ultraviolet absorbent. The thickness of the ultraviolet absorbing layer 31 is usually in the range of about 0.1 micrometers (0.1 μm) to 10 micrometers (10 μm), and preferably has a lower limit of 0.5 micrometers (0.5 μm) or more. The upper limit is 5 micrometers (5 μm) or less. When the thickness is within the above range, both the ultraviolet absorption performance and transparency of the ultraviolet absorption layer 31 can be achieved.

  The optically variable ink layer 32 is an optically variable image forming layer in which an image is formed of an optically variable material. The optically variable material is not particularly limited as long as it can express a desired color, but in particular, when viewed from a predetermined angle, the same color as the image of the volume hologram layer 26 can be expressed. It is preferable. By using such an optically variable material, the image of the optically variable image forming layer and the image of the volume hologram layer 26 can be made the same color image when viewed from a predetermined angle. For example, by forming each layer so that the image of the optically variable image forming layer and the image of the volume hologram layer 26 overlap each other, the image of the volume hologram layer 26 is prevented from being visually recognized at a specific angle. It becomes possible, and the security can be further improved.

  Examples of the optically variable material include pearl pigments, polarizing inks, liquid crystal inks, and retroreflective inks. In the present invention, one or more of these optically variable materials may be used. The thickness of the optically variable ink layer 32 is usually in the range of about 0.5 micrometers (0.5 μm) to 50 micrometers (50 μm), preferably 1 micrometer (1 μm) to 20 micrometers (20 μm). ) When the thickness is in the above range, a sufficient optical variable effect can be obtained.

  The fluorescent image forming layer 33 is a layer in which an image is formed by a fluorescent material that emits fluorescence by absorbing ultraviolet rays. The fluorescent material used in this modification is not particularly limited as long as it can emit fluorescence having a desired wavelength by absorbing ultraviolet rays.

  At least one type of fluorescent material is used in the present modification, but in this modification, it is preferable to use a plurality of fluorescent materials having different wavelengths of emitted fluorescence, particularly red, green, and blue. It is preferable to use fluorescent materials that emit colors. This is because it is possible to form a fluorescent full-color image on the volume hologram layer 26 used in this modification.

  Examples of the fluorescent material used in this modification include organic fluorescent dyes and inorganic fluorescent dyes. Examples of organic fluorescent dyes include diaminostilbene disulfonic acid derivatives, imidazole derivatives, coumarin derivatives, derivatives of triazole, carbazole, pyridine, naphthalic acid, imidazolone, dyes such as fluorescein and eosin, compounds having a benzene ring such as anthracene, etc. Is mentioned. Specifically, visible fluorescent colorless dyes include EB-501 (Mitsui Chemicals, Inc., emission color: blue), EG-302 (Mitsui Chemicals, Inc., emission color: yellowish green), EG-307 (Mitsui Chemicals, Inc., emission color: green), ER-120 (Mitsui Chemicals, emission color: red), ER-122 (Mitsui Chemicals, emission color: red) And Ubitex OB (manufactured by Ciba Specialty Chemicals Co., Ltd., emission color: blue), europium-thenoyl trifluoroacetone chelate (Sinloihi Co., Ltd., red-orange) and the like.

As the inorganic fluorescent dye, for example, oxides such as Ca, Ba, Mg, Sr, etc., crystals such as sulfides, silicates, phosphates, tungstates, etc. are the main components, and Eu, Mn, A pigment to which a metal element such as Pb, Fe, Mn, Zn, Ag, or Cu or a rare earth element is added as a dopant can be used. Specifically, under visible light, colorless to white G-300 series (SrAl ₂ O ₄ : Eu, Dy manufactured by Nemoto Special Chemical Co., Ltd., luminescent color: green) and V-300 series (CaAl ₂ O ₄ : Eu, Nd root) Special chemicals, luminescent color: purple).

  Examples of the fluorescent material used in this modified example include thiophene fluorescent dyes, β-quinophthalone fluorescent dyes, coumarin fluorescent dyes, bisstyrylbenzene fluorescent dyes, oxazole fluorescent dyes, and europium complex fluorescent dyes. Etc. can also be mentioned. Specific examples of these fluorescent dyes include those described in JP-A No. 2004-122690.

  In addition, it is preferable that the fluorescent image forming layer 33 used in this modification usually contains a binder resin in addition to the fluorescent material. Examples of the binder resin used in this modification include cellulose resins such as ethyl cellulose, ethyl hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, and cellulose acetate, polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinyl acetal, polyvinyl pyrrolidone, and the like. Examples thereof include acrylic resins such as vinyl resins, poly (meth) acrylates and poly (meth) acrylamides, polyurethane resins, polyamide resins, polyester resins, and mixtures of these resins. In this modification, any of these resins can be suitably used.

  The thickness of the fluorescent image forming layer 33 is, for example, about 10 micrometers (10 μm).

Also in this modified example, the transfer foil winding roll 17 and the unloading mechanism in which the portion of the hologram transfer foil 18 corresponding to the rear edge 28 of the hologram laminate 22 has reached the peeling bar 16 in the forming process of the hologram laminate 22. 19 is controlled so that the moving speed V ₁ of the hologram transfer foil 18 by the transfer foil winding roll 17 is faster than the moving speed V ₂ of the transfer medium 14 by the carry-out mechanism 19. Accordingly, the thermocompression-bonded hologram transfer layer 24 can be accurately separated from the other hologram transfer layers 24 at the lower portion of the peeling bar 16, and the transfer medium 14 can be transferred to the transfer medium 14 without generating burrs 29 described later. The hologram transfer layer 24 can be thermally transferred.

FIG. 1 is a diagram showing a transfer medium on which a hologram laminate is formed in an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a hologram transfer foil in one embodiment of the present invention. FIG. 3 is a diagram showing a hologram thermal transfer apparatus according to an embodiment of the present invention. FIG. 4 is a diagram showing a process of thermocompression bonding a hologram transfer layer to a transfer medium in an embodiment of the present invention. FIG. 5 is a diagram showing a step of thermocompression bonding a hologram transfer layer to a transfer medium in an embodiment of the present invention. FIG. 6 is a diagram showing a hologram laminate formed on a transfer medium in one embodiment of the present invention. FIG. 7 is a schematic diagram showing the vicinity of a peeling bar when separating a thermocompression-bonded hologram transfer layer from other hologram transfer layers in an embodiment of the present invention. FIG. 8 is a diagram showing a comparative example in which burrs are generated on the transfer medium. FIG. 9 is a diagram showing a configuration of a hologram transfer foil in a modification of the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Receiving roller 11 Heating roller 12 Transfer medium sending roller 13 Unloading roller 14 Transfer medium 15 Transfer foil supply roll 16 Peeling bar (peeling member)
DESCRIPTION OF SYMBOLS 17 Transfer foil winding roll 18 Hologram transfer foil 19 Unloading mechanism 22 Hologram laminated body 23 Base material 24 Hologram transfer layer 25 Peeling protective layer 26 Volume type hologram layer 27 Adhesive layer 28 Trailing edge 35 Transfer foil guide roller 40 Hologram product 50 Hologram thermal transfer device 60 controller

Claims (6)

A receiving roller;
A hologram transfer foil having a substrate and a hologram transfer layer including at least a volume hologram layer is sandwiched between the receiving roller and the transfer medium, and the hologram transfer layer is heated and pressed to heat the transfer medium. A heating roller for crimping;
Provided on the downstream side of the receiving roller and the heating roller, the base of the hologram transfer foil is peeled off from the hologram transfer layer, and the thermocompression-bonded hologram transfer layer is separated from the other hologram transfer layers to obtain a predetermined shape. A peeling member for forming a hologram laminate including at least a volume hologram layer on a transfer medium;
A transfer foil winding roll that is provided on the downstream side of the peeling member and winds up the hologram transfer foil after the thermally bonded hologram transfer layer is separated;
A carry-out mechanism provided on the downstream side of the peeling member and carrying out the transfer medium on which the hologram laminate is formed;
A control unit that controls at least one of the transfer foil winding roll and the carry-out mechanism;
The control unit controls at least one of the transfer foil take-up roll and the carry-out mechanism when the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, and the transfer foil take-up roll A hologram thermal transfer apparatus characterized in that the moving speed of the hologram transfer foil is faster than the moving speed of the transfer medium by the carry-out mechanism. The carry-out mechanism conveys the transfer medium at a constant moving speed from the upstream side to the downstream side of the peeling member,
When the part of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, the control unit controls the transfer foil winding roll to control the moving speed of the hologram transfer foil by the transfer foil winding roll. The hologram thermal transfer apparatus according to claim 1, wherein the hologram thermal transfer apparatus is faster than a moving speed of the transfer medium. The transfer foil winding roll winds the hologram transfer foil from the upstream side to the downstream side of the peeling member at a constant moving speed,
The control unit controls the carry-out mechanism when the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, and controls the moving speed of the medium to be transferred by the carry-out mechanism. The hologram thermal transfer apparatus according to claim 1, wherein the hologram thermal transfer apparatus is slower than the speed. Preparing a hologram transfer foil having a base material and a hologram transfer layer including at least a volume hologram layer;
A step of superimposing the hologram transfer foil on the transfer medium so that the hologram transfer layer faces the transfer medium;
A step of heat-pressing the hologram transfer foil between the receiving roller and the heating roller on the transfer medium, and thermocompression bonding the hologram transfer layer to the transfer medium;
In the peeling member, the base material of the hologram transfer foil is peeled from the hologram transfer layer, and the hologram transfer layer thermocompression-bonded is separated from the other hologram transfer layers and has a predetermined shape and includes at least a volume hologram layer Forming a hologram laminate on a transfer medium;
A step of winding the hologram transfer foil after the thermally bonded hologram transfer layer is separated by a transfer foil winding roll;
A step of carrying out the transfer medium on which the hologram laminate is formed by a carry-out mechanism,
When the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, control of at least one of the transfer foil take-up roll and the carry-out mechanism, A method for manufacturing a hologram laminate, wherein the moving speed is made faster than the moving speed of a medium to be transferred by a carry-out mechanism. In the step of carrying out the transfer medium by the carry-out mechanism, the carry-out mechanism carries the transfer medium at a constant moving speed from the upstream side to the downstream side of the peeling member,
When the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, the transfer foil winding roll is controlled to control the moving speed of the hologram transfer foil by the transfer foil winding roll. The method for producing a hologram laminate according to claim 4, wherein the hologram stack is made faster than the moving speed of the hologram laminate. In the step of winding the hologram transfer foil by the transfer foil winding roll, the transfer foil winding roll winds the hologram transfer foil from the upstream side to the downstream side of the peeling member at a constant moving speed,
When the portion of the hologram transfer foil corresponding to the trailing edge of the hologram laminate reaches the peeling member, the unloading mechanism is controlled so that the moving speed of the medium to be transferred by the unloading mechanism is slower than the moving speed of the hologram transfer foil. The method for manufacturing a hologram laminate according to claim 4.

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