JP2014043049A - Method for manufacturing transcript and the transcript - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method in which, firstly, transcription is carried out of a desired design without using a transfer mold, and secondly, a foil stamping position is prevented from deviating from a desired position, and which thirdly is applicable to metal deposition foil such as vacuum deposition.SOLUTION: There is provided a method for manufacturing a transcript, that uses transcript foil provided with a transfer layer composed from at least a release layer and a vapor deposition layer on a base material surface, and that uses a transferred object having an adhesion printing part, and in which the transfer foil is transcribed only to the adhesion printing part of the transferred object.

Description

  The present invention relates to a transfer material provided with a release layer, a vapor deposition layer, and an adhesive layer, and in particular, a method for producing a vapor deposition transfer material used for so-called foil stamping and hot stamping, in which a design having a metallic feeling is thermally transferred to a printed material. About.

  Foil stamping is widely used in various printed materials such as books and packages. Foil stamping using a transfer foil having a glossy metal vapor-deposited layer can be expressed with difficulty in normal printing. The foil stamping is mainly useful for decorating various printed materials.

  In the conventional method, the so-called hot stamping method, it is necessary to prepare a transfer die 40 made of a metal such as brass or copper for each desired pattern at the time of foil stamping. More specifically, in the transfer using the conventional transfer foil, the transfer foil 13 includes the transfer layer 12 and the substrate 1 as shown in FIG. The transfer layer 12 includes a release layer 2, a vapor deposition layer 3, and an adhesive layer 4. In the actual transfer state, as shown in FIG. 5, only the portion heated and pressed by the transfer mold 40 is transferred to the transfer target 5.

  In this method, since it is necessary to produce the transfer mold 40 for each design, even if the details are corrected or changed, it takes money and time. In addition, when foil is pressed on a printed matter, as shown in FIG. 6, there is a problem that a defective product is produced when the foil pressing position is deviated from a predetermined position due to the relationship between the print portion 31 and the pattern of the foil pressing portion 32. It was. In particular, the metal foil is not light transmissive and the opposite side is transparent and cannot be seen. Therefore, the work while confirming the position cannot be performed, and it is difficult to prevent defects.

In order to solve such a problem, in Reference 1, a hot melt-containing W / O emulsion ink serving as an adhesive layer and a stencil sheet having an image portion are used to form an adhesive on a substrate to be transferred by a stencil printing method. A foil transfer method is proposed in which a layer is printed and a transfer foil composed of a base film / adhesive layer / foil layer is superposed on the adhesive layer and transferred by thermocompression bonding.
In this method, the transfer position is transferred only to the stencil printing position printed on the transfer substrate. However, this method can be transferred only to a substrate to be transferred that is a material that can be in close contact with the W / O emulsion ink containing hot melt and has a flat surface. Therefore, there is a problem that it is difficult to use other than paper having permeability. In addition, there is a problem that the emulsion is not stable due to emulsification with a surfactant or the like, and is altered by long-term storage. Furthermore, when a hot melt-containing W / O emulsion ink serving as an adhesive layer is used for the adhesive layer, a foil such as a metal-deposited foil whose surface properties greatly affect the appearance is included in the emulsion due to heat during transfer. Since water evaporates and begins to foam, there is a problem that the smoothness of the smooth metal deposition surface cannot be maintained and the metallic luster is lost.

Japanese Patent No. 3115402

  A first object of the present invention is to enable a desired design to be transferred without using a transfer mold. A second problem is to prevent the foil pressing position from deviating from a desired position. A third problem is to adopt a method that can be employed for metal-deposited foils such as vacuum deposition.

  In order to achieve the above object, the invention according to claim 1 uses a transfer foil provided with a transfer layer comprising at least a release layer and a vapor deposition layer on the surface of a substrate, and a transfer object having an adhesive printing portion. A transfer material manufacturing method characterized in that a transfer foil is transferred only to an adhesive printing portion of an object.

  The invention according to claim 2 is a method for producing a transfer product using a thermoplastic non-aqueous adhesive resin as an adhesive used for an adhesive printed portion.

  The invention according to claim 3 is a method for producing a transfer product using a vinyl chloride-vinyl acetate copolymer / polyester resin as a thermoplastic non-aqueous adhesive resin.

  The invention according to claim 4 uses a transfer foil in which a transfer layer comprising at least a release layer and a vapor deposition layer is provided on the surface of a base material and a transfer object having an adhesive print part, and is used only on the adhesive print part of the transfer object. A transfer product obtained by transferring a transfer foil.

  The invention according to claim 5 is a transfer product using a thermoplastic non-aqueous adhesive resin as an adhesive used for the adhesive printed portion.

  The invention according to claim 5 is a transfer product using a vinyl chloride-vinyl acetate copolymer / polyester resin as a thermoplastic non-aqueous adhesive resin.

  The present invention is characterized in that the transfer foil is transferred only to the adhesive printing portion of the transfer object 5 formed in a desired design by printing or the like. Thus, a desired design can be transferred without using a transfer mold corresponding to the design to be transferred. In addition, by printing the adhesive layer 4 on the transfer target 5 in advance, the transfer position is not shifted. In addition, there is an advantage that even a transfer foil having a smooth vapor deposition surface with metallic luster can be transferred with metallic luster without degrading the gloss.

It is sectional drawing which represented this invention typically. It is sectional drawing which represented typically the transcription | transfer material obtained by this invention. It is a transfer result image of the present invention. 6 is a cross-sectional view schematically showing a transfer foil of Comparative Example 1. FIG. 4 is a cross-sectional view schematically showing a transfer product obtained in Comparative Example 1. FIG. 2 is a transfer result image of Comparative Example 1. It is a transfer result image of comparative example 2.

  FIG. 1 schematically shows an example of the transfer foil of the present invention. The transfer foil 11 of the present invention includes a substrate 1 and a transfer layer 10. The transfer layer 10 includes at least a release layer 2 and a vapor deposition layer 3, and is laminated so that the release layer 2 is in contact with the substrate 1. In addition, the adhesive layer 4 is formed in advance on the transfer target 5 in a desired pattern by printing.

As the base material 1, a sheet-like or film-like flexibility is preferable, and a polyethylene terephthalate film, a vinyl chloride film, a stretched polypropylene film, and the like are conceivable. Among these, from the viewpoint of surface smoothness, dimensional stability, heat resistance, workability, economy, toughness, etc., a film obtained by heat-setting a biaxially stretched polyethylene terephthalate film is most preferable.
The thickness of the substrate is preferably 10 μm or more and 30 μm or less. If it is thinner than 10 μm, there is a problem that the strength is insufficient and elongation due to tension during printing or transfer cannot be prevented. On the other hand, if it is thicker than 30 μm, there are problems such as deterioration of thermal conductivity, shape followability to the transferred material, and cost stop.
The heat setting of the base film serves to release the stress of the stretched film. Therefore, unevenness that is partially deformed or pulled does not occur even in subsequent printing or heating by coating. Also, abnormalities such as elongation of the foil during transfer are less likely to occur.

The release layer 2 is intended for smooth release between the substrate and the transfer layer. Examples of the material for the release layer include styrene copolymer resins, acrylic resins, rosin ester resins, polyamide resins, and urethane resins. Among these, acrylic resins are preferable.
The thickness of the release layer is preferably 0.5 μm or more and 2 μm or less. When the thickness is less than 0.5 μm, the peeling is not performed smoothly, and there is a problem that unevenness tends to occur in the transfer result. On the other hand, if it is thicker than 2 μm, there are problems such as deterioration of foil breakage, reduction of foil surface strength after transfer, and cost increase.
As an apparatus for coating the release layer 2, known methods such as gravure coating, roll coating, doctor blade coating, die coating, bar coating, spray coating and the like can be used. You may apply | coat only to a required range partially using a gravure printing machine.
The release layer 2 is located on the surface of the transferred material after transfer, and serves as a protective layer, and also serves as a vapor deposition anchor layer for reliably obtaining a flat gloss during vapor deposition. However, a vapor deposition anchor layer may be added individually for the role of the vapor deposition anchor. In order to color the metallic luster, the release layer or the vapor deposition anchor layer is colored. For example, if a deposition anchor layer colored orange is provided before aluminum deposition, it looks golden. Of course, printing such as a register mark indicating a printing position, or a character or a pattern may be provided as a separate print layer.

  A release layer may be provided between the substrate and the release layer so that the release layer is surely separated from the substrate. In this case, the release layer may be coated using a thermosetting resin or the like, or printed according to the pattern. After the transfer, it is preferable that the release layer expands due to heat at the time of transfer or the like and is easily peeled off.

The vapor deposition layer 3 is a layer formed on the peeling layer 2 by vapor deposition. For example, a metal vapor deposition layer provided by vapor deposition of metal can be used, and examples of the metal capable of vapor deposition include aluminum, nickel, chromium, tin, copper, silver, and gold. Moreover, inorganic substances and alloys such as silicon oxide and stainless steel can be deposited by a method such as chemical vapor deposition. Among these, aluminum vapor deposition is preferable from the viewpoint of chemical handling and cost.
The thickness of the vapor deposition layer is preferably 35 nm or more and 100 nm or less. If it is thinner than 35 nm, the problem of insufficient concealment occurs. On the other hand, if it is thicker than 100 nm, there are problems such as an increase in cost and deterioration of the foil cutting property during transfer.

The adhesive layer 4 is a layer that adheres the transfer layer 10 and the transfer target 5. As a material for such an adhesive layer, a thermoplastic non-aqueous adhesive resin is preferable. The thermoplastic non-aqueous adhesive resin is a mixed resin in which a tacky thermoplastic resin and an organic solvent adhesive are combined. This is because the adhesive layer needs to be completely dry and free from any water that evaporates and boils with the heat of transfer. Therefore, a solvent system that is easily scattered and evaporated by normal heating and drying is preferable. It is necessary to have thermoplasticity at a temperature sufficiently lower than the heat resistance of the transfer object. Among these, when a vinyl chloride-vinyl acetate copolymer / polyester resin or the like is used, transfer can be performed stably. In the present invention, the adhesive layer is formed on the transfer target 5 in a desired design by printing. The thickness of the adhesive layer is preferably 1.5 μm or more and 3 μm or less. If it is thinner than 1.5 μm, there is a problem that sufficient adhesive force cannot be obtained, and if it is thicker than 3 μm, there is a problem that the foil cutting property deteriorates.
When printing the adhesive layer 4 on the transfer object, a gravure printing machine, an intaglio offset printing machine, a silk printing machine, or the like can be used. By printing, an adhesive layer is formed at a desired position with a desired design.

As the material to be transferred 5 onto which the transfer layer 10 is transferred, an object to which an adhesive layer can be attached and can withstand heat during transfer is preferable. Examples of such a member to be transferred include plastic, leather, and film, and paper is particularly preferable.
As shown in FIG. 2, the transfer uses a roll transfer machine or an up-down transfer machine. The transfer roll 41 shown in the figure is a metal cylinder on the inner side, but the front side is made of heat-resistant rubber such as silicon rubber. The opposite side of the transfer roll 41 is heated by the heater 42, and the heated transfer roll rotates to the transfer side, and pressure is applied to the transfer foil 11 and the adhesive layer 4 formed on the transfer target 5. Only the portion where heat is transferred and the adhesive layer 4 is present is transferred. The surface temperature of the transfer roll 41 is always measured by a surface thermometer, and is kept at a constant temperature by turning on / off the heater so that stable transfer can be performed. Of course, the heating method is not limited to the above-described transfer roll, and any other heat transfer roll or flat transfer plate may be used as long as heat and pressure can be applied. In the case of a flat plate-like transfer plate, the tip is generally made of silicon rubber, and a hot plate that is heated by a cartridge heater or the like is attached to the back side thereof.
The transfer temperature can be selected according to the material of the transfer target 5 and the plasticizing temperature of the adhesive layer 4. For example, when the transfer target 5 is paper, the transfer temperature can be 100 ° C. to 130 ° C. By applying heat and pressure, a desired design is transferred only to a portion where the adhesive layer 4 has been printed in advance, that is, to a desired position. In this way, the transferred object 21 of the present invention can be obtained. FIG. 2 schematically shows a state where the transcript of the present invention is thus transferred.

  When the transfer foil 11 of the present invention is transferred, the transfer mold 40 corresponding to the design is not necessary. When transferring, the part that directly contacts the substrate 1 is not particularly limited as long as it is a material and a shape that can uniformly apply heat and pressure to the range of the design to be transferred.

<Example 1>
A release layer made of an acrylic resin was applied to a polyethylene terephthalate film having a thickness of 12 μm as a base material using a gravure printing machine. Next, aluminum vapor deposition was performed to form a vapor deposition layer having a thickness of 50 nm on the release layer, and a transfer foil corresponding to the present invention was produced.
Next, the adhesive layer 4 made of a vinyl chloride-vinyl acetate copolymer / polyester resin is transferred to the paper to which the image to be transferred is printed at a position to be transferred using a gravure printing machine. The transferred layer 20 of the present invention was produced by printing with the following design.
The transfer layer side of the transfer foil prepared above was overlapped toward the adhesive layer 4 portion of the transfer target layer 20 similarly prepared above. After transferring and applying pressure from the transfer foil base material side with a heating roll heated to 120 ° C. using an AR-100R hot stamping machine manufactured by Navitas, the base material 1 of the transfer foil was peeled off. A schematic diagram of the transcript of the present invention thus obtained is shown in FIG. An image of the transfer result is shown in FIG.

<Comparative Example 1>
A release layer made of an acrylic resin was applied to a polyethylene terephthalate film having a thickness of 12 μm as a base material using a gravure printing machine. Next, aluminum vapor deposition was performed, and a 50 nm-thickness vapor deposition layer was formed on the peeling layer. On the vapor deposition layer, an adhesive layer made of vinyl chloride-vinyl acetate copolymer / polyester resin was applied to the entire surface using a gravure printing machine. A schematic diagram of the completed transfer foil is shown in FIG. The transfer layer of the transfer foil was transferred to paper on which a pattern was printed using the design transfer mold transferred in Example 1. A schematic view of the transcript of the present invention thus obtained is shown in FIG. An image of the transfer result is shown in FIG.

<Comparative example 2>
The transfer foil of Example 1 was used as the transfer foil.
Next, on the paper on which the image to be transferred is printed, the adhesive layer 4 made of a modified acrylic resin is printed with a design to be transferred to the position to be transferred using a gravure printing machine, The transferred layer 20 of the present invention was produced.
The transfer layer side of the transfer foil prepared above was overlapped toward the adhesive layer 4 portion of the transfer target layer 20 similarly prepared above. After transferring and applying pressure from the transfer foil base material side with a heating roll heated to 120 ° C. using an AR-100R hot stamping machine manufactured by Navitas, the base material 1 of the transfer foil was peeled off. The schematic diagram of the transfer product of the present invention thus obtained is the same as FIG. An image of the transfer result is shown in FIG.

<Comparison result>
The materials to be transferred obtained in Example 1, Comparative Example 1, and Comparative Example 2 are compared.
In FIG. 3 showing the transfer result of Example 1, a foil stamping portion 32 was formed at the center of the pattern printing portion 31, and foil stamping was performed at a desired position on the pattern. That is, it shows a state where the alignment has been accurately performed.
In FIG. 6, which is a transfer result of Comparative Example 1, the foil pressing portion 32 is shifted from the center of the pattern printing portion 31 as compared with FIG. 3. That is, it shows a state where the pattern and the foil stamping cannot be accurately aligned.
FIG. 7 showing the transfer result of Comparative Example 2 shows that, as in Example 1, the foil stamping portion 32 was formed at the center of the pattern printing portion 31 and the foil stamping was performed at a desired position on the pattern. This shows a state where a part of the film is not transferred and remains on the transfer foil side.
Compared to Comparative Example 1 in which the foil pressing location was shifted from the desired position on the pattern, Example 1 was able to foil at the desired position on the pattern. This is an effect of forming the adhesive layer in a desired position in advance by printing. And in the comparative example 2, transferability and foil cutting property are not perfect, and it has shown that the resin system of a contact bonding layer is inferior compared with the transfer foil of this invention.

The transfer foil of the present invention can be transferred without preparing the design transfer mold.
In particular, the transfer utilizing the gloss of metal vapor deposition had problems such as misalignment. However, the method and the adhesive layer of the present invention allowed the alignment while utilizing the smooth and specular metal gloss. Became stable and mass production became possible. Furthermore, since the adhesive layer is formed in a desired design in advance, the foil pressing position does not deviate from the predetermined position.
The present invention can be used mainly to add decorativeness to papers such as various packaging materials and books, and is particularly useful for fine designs in which the positional relationship between printed patterns and foil stamping is important, and transferability And the foil cutting property is also good.
In a normal gravure printing machine, the positional accuracy can only be controlled to about plus or minus 1 mm. Even if it is combined with a TV camera and a position control device capable of aligning the X-axis and Y-axis separately, it is very difficult to adjust to 0.2 mm. However, when the method of the present invention is employed and the printed material is a molded material or a previously cut plate material, the transferred material can be fixed to the jig by silk printing or intaglio offset printing. For example, it is possible to easily print the positioning adhesive layer within 0.1 mm. Therefore, the method of the present invention has a greater merit when used for a sheet of a single sheet or a transfer product of a molded product.

1: Base material 2: Release layer 3: Deposition layer 4: Adhesive layer 5: Transfer object 10: Transfer layer 11: Transfer foil 12: Transfer layer (conventional product)
13: Transfer foil (conventional product)
20: Transfer target layer 21: Transfer object 31: Print part 32: Foil pressing part 40: Transfer mold 41: Transfer roll 42: Heating heater

Claims (6)

  The transfer foil was transferred only to the adhesive print part of the transfer object using a transfer foil provided with a transfer layer comprising at least a release layer and a vapor deposition layer on the substrate surface and the transfer object having the adhesive print part. A method for producing a transcription product.   The method for producing a transfer product according to claim 1, wherein a thermoplastic non-aqueous adhesive resin is used as an adhesive used for the adhesive printed portion.   The method for producing a transfer product according to claim 2, wherein a vinyl chloride-vinyl acetate copolymer / polyester resin is used as the thermoplastic non-aqueous adhesive resin.   The transfer foil was transferred only to the adhesive print part of the transfer object using a transfer foil provided with a transfer layer comprising at least a release layer and a vapor deposition layer on the substrate surface and the transfer object having the adhesive print part. Characteristic transcript.   The transfer product according to claim 4, wherein a thermoplastic non-aqueous adhesive resin is used as an adhesive used in the adhesive printing portion.   6. The transfer product according to claim 5, wherein a vinyl chloride-vinyl acetate copolymer / polyester resin is used as the thermoplastic non-aqueous adhesive resin.