JPH0737919Y2 - Transfer foil - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a transfer foil. More specifically, a transfer foil with excellent suitability for transfer printing that does not cause the so-called foil burr phenomenon that the transfer layer remains in areas where transfer printing is not required, such as holes, grooves, and outer edges of the surface of the transferred material. It is about.

[Prior art]

As a conventional transfer foil, a peeling layer /
It is known that a transfer layer is formed by sequentially laminating a picture layer and an adhesive layer. In this conventional transfer foil, the interface between the base film and the transfer layer is a part of the surface of the transfer target that requires transfer of the transfer layer (hereinafter referred to as a transfer necessary part) or the surface of the transfer target. Regardless of which part of the transfer layer was not required to be transferred (hereinafter, referred to as a transfer-unnecessary part), excellent releasability was uniformly imparted to the entire surface.

[Problems to be solved by the device]

As a result, the conventional transfer foil has excellent releasability evenly over the entire surface, so that when the transfer layer and the base film are separated, which is one step of the transfer printing process, the transfer film and the transfer film are not separated. Even at the interface between the transfer layer on the unnecessary portion and the transfer layer on the transfer-required portion, the peeling has been performed due to the peeling at the interface.
Therefore, the so-called foil burr phenomenon in which the transfer layer remains as "foil burr" on the transfer unnecessary portion is unavoidable. As a result, the conventional transfer foil has the following problems due to the foil burr phenomenon. One is the problem that the foil burrs must be removed after the base film is peeled off, and the other is that the foil burrs are liable to scatter and tear, so the fragments can be transferred. This is one of the causes of dents during processing, which impairs design and functionality.

[Means for Solving the Problems]

As a result of various studies and devising by analyzing the foil burr phenomenon, the present invention was able to devise a transfer foil having a structure in which the foil burr phenomenon does not occur, and was able to solve the problems caused by the foil burr phenomenon. That is, according to the present invention, a foil burr prevention layer that cannot be peeled from the base film is provided on one surface of the base film in the same pattern as the pattern of the transfer-unnecessary portion of the transferred material, and at least the foil burr prevention layer is formed thereon. A peeling layer that can be peeled from the base film is provided so as to cover a portion that is not formed, and a pattern layer and an adhesive layer are sequentially provided on the peeling layer, which are layers provided on the foil burr prevention layer. The feature is that the pattern layer and the adhesive layer cannot be separated from the foil burr prevention layer. Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the transfer foil of the present invention. FIG. 2 is a cross-sectional view showing an object to which the transfer layer of the transfer foil of the present invention is transferred. Reference numeral 1 is a base film, 2 is a release layer, 3 is a pattern layer, 4 is an adhesive layer, 5 is a transfer layer, 6 is a foil burr prevention layer, and 7 is a transfer target. As the base film 1, a plastic film such as polyethylene terephthalate / polypropylene / polyethylene / nylon / cellophane that can be usually used as a base film of a transfer foil is used.
These films may be used alone or as a composite film of two or more kinds. Alternatively,
You may use as a composite film with paper etc. In addition, the base film 1 may be one whose surface is subjected to a release treatment using an appropriate resin in order to enhance the releasability, or an uneven surface may be used in order to enhance the design of the transfer layer. A processed product may be used. First, the foil burr prevention layer 6 is provided on the base film 1 in the same pattern as the pattern of the transfer unnecessary portion of the transferred body 7. The foil burr prevention layer 6 includes a base film 1, a peeling layer 2 and
It is formed of an ink that does not easily delaminate from each of the pattern layer 3 and the adhesive layer 4. As the ink used for forming the foil burr prevention layer 6, for example, the base film 1 made of polyethylene terephthalate having an untreated surface is used as the base film 1 such that the ink having polyethylene terephthalate as a resin binder is used. Use an ink that uses a resin binder of the same type that has a good affinity with the existing resin. Alternatively, for the base film 1 which has been subjected to a mold release treatment by coating with an appropriate resin, an ink using a resin binder having a good affinity with the resin used for the mold release treatment is used. As described above, a resin having an affinity and an excellent adhesive strength is selected and used depending on the material of the base film 1 used or the treatment state of the surface. By doing so, the adhesive force between the foil burr prevention layer 6 and the base film 1 is
Compared with the adhesive force between the release layer 2 and the base film 1,
It becomes much larger, and the foil burr prevention layer 6 and the base film 1 cannot be separated. Foil burr prevention layer 6
Is provided by an ordinary printing method such as a gravure printing method or a screen printing method. The peeling layer 2 is provided on at least a portion of the base film 1 where the foil burr prevention layer 6 is not formed. Since the peeling layer 2 can be peeled off from the base film 1 after transfer and becomes the surface of the transferred body 7, it is required to be physically and chemically strong. As the ink used for forming the peeling layer 2, there are resins such as acrylic resins, hydrocarbon resins, olefin chloride resins, and waxes such as paraffin wax and synthetic wax. By using the ink containing these as the main components, good releasability can be obtained between the material of the base film 1 and the resin applied for the release treatment. Release layer 2
Is provided by an ordinary printing method such as a gravure printing method or a screen printing method. The pattern layer 3 is formed of an ink containing a dye and pigment of an appropriate color and a resin binder. As a resin binder,
Generally, a thermoplastic resin is suitable, for example, a vinyl chloride-vinyl acetate copolymer / polyamide / polyester / polyacryl / polyurethane / polyvinyl acetal / polyester urethane / chlorinated rubber resin binder that is used for inks for ordinary pattern layers is used. These may be used alone or as a mixture of two or more kinds. Also, the pattern layer 3
In order to strengthen the resin, a thermosetting resin or an ultraviolet curable resin may be used. The pattern layer 3 is formed by an ordinary printing method such as a gravure printing method or a screen printing method.
Alternatively, a metal vapor deposition layer may be used as the pattern layer 3. The metal vapor deposition layer is formed by a vacuum vapor deposition method, a sputtering method, an ion plating method or the like, and examples of the metal used include aluminum, nickel and chromium. Further, in order to improve the adhesion strength of the metal vapor deposition layer, a vapor deposition anchor layer may be provided before and after the metal vapor deposition layer, if necessary. The vapor deposition anchor layer contains the above-mentioned thermoplastic resin / thermosetting resin or a mixture thereof as a main component, and may optionally be mixed with a face wash. The adhesive layer 4 is for fixing the transfer material to the surface of the transferred material 7 by heating and pressing, and the ink is appropriately selected according to the material of the transferred material 7. For example, when the transferred material 7 is an AS resin, an acrylic resin or a vinyl resin may be used, and when the transferred material 7 is a polypropylene, an ink containing a chlorinated polypropylene resin or an ethylene vinyl acetate copolymer resin as a main component may be used. The adhesive layer 4 is usually formed by a printing method such as a gravure printing method, a screen printing method, a gravure coater method, a roll coater method, and a reverse coater method.

[Action]

The transfer foil having the above structure is used for transfer printing. First, the transfer foil of the present invention is placed by registering the pattern of the foil burr prevention layer and the pattern of the transfer-unnecessary portion on the surface of the transferred material. Then, the transfer layer is adhered and fixed on the transfer-required portion of the surface of the transfer target by heating and pressurization, and the base film is peeled off. At the transfer required portion, the base film is peeled off at the interface with the peeling layer, and the transfer layer is adhesively fixed to the surface of the transfer target. In the transfer unnecessary portion, the base film cannot be peeled off at the interface with the foil burr prevention layer, so the transfer layer is pulled upward together with the base film. At this time, a crack occurs at the boundary between the peeling layer of the transfer layer that is adhesively fixed on the transfer-required portion of the transfer target surface and the foil burr prevention layer of the transfer layer that is located on the transfer-unnecessary portion. Then, a crack spreads in the thickness direction of the transfer layer, and the transfer layer is properly sheared at the boundary between the transfer required portion and the transfer unnecessary portion. The transfer foil of the present invention can also be applied to simultaneous transfer printing with pictures by injection molding.

【Example】

On a polyester film having a thickness of 25 μm, an ink having the following composition 1 was used to form a foil burr prevention layer in a pattern corresponding to the pattern of the transfer-unnecessary portion of the transferred material, and the ink having the composition 2 was used thereon. A peeling layer is provided so as to cover at least a portion where the foil burr prevention layer is not provided, a pattern layer is provided thereon by using the ink of composition 3, and an adhesive is produced thereon by using the ink of composition 4. A layer was provided to obtain a transfer foil. (Parts by weight) Composition 1: Acrylic resin and polyester resin mixture 10 parts Toluene 45 parts Methyl ethyl ketone 45 parts Composition 2: Acrylic resin 10 parts Toluene 45 parts Methyl ethyl ketone 45 parts Composition 3: Acrylic resin and vinyl resin mixture 15 parts Pigment 30 parts Toluene 35 parts Methyl ethyl ketone 20 parts Composition 4: Acrylic resin 15 parts Toluene 40 parts Ethyl acetate 40 parts The pattern of the foil deburring layer of the transfer foil thus obtained is registered with the pattern of the transfer-unnecessary part of the transfer target surface. After transfer, the base film was peeled off, and the transfer layer in the transfer-unnecessary portion was removed cleanly and no foil burr was generated.

[Effect of device]

The transfer foil of the present invention has the following effects because it is configured as described above. In other words, when peeling the transfer layer and the base film, which is one step of the transfer printing process, the transfer layer is easily peeled at the interface with the base film in the transfer required portion on the surface of the transfer target, while the transfer layer is not peeled in the transfer unnecessary portion. Since the foil burr prevention layer is inseparable from the base film and the layers on the foil burr prevention layer, the transfer layer in the transfer-unnecessary portion is removed cleanly together with the base film, and the foil burr phenomenon does not occur. As a result, there is no need for a troublesome post-processing such as deburring of foil, and there is no fear of scattering of transfer layer fragments. Therefore, since unnecessary work can be omitted, transfer printing can be easily performed, and a transfer molded product can be obtained in which designability and functionality are not impaired.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the transfer foil of the present invention. FIG. 2 is a cross-sectional view showing an object to which the transfer layer of the transfer foil of the present invention is transferred. 1 ... Base film, 2 ... Release layer, 3 ... Design layer,
4 ... Adhesive layer, 5 ... Transfer layer, 6 ... Foil burr prevention layer,
7 ... Transferee

Claims (1)

[Scope of utility model registration request] 1. A foil burr-preventing layer which cannot be peeled from the base film is provided on one surface of the base film in the same pattern as a pattern of a transfer-unnecessary portion of a transferred body, and at least the foil burr-preventing layer is formed thereon. A peeling layer that can be peeled from the base film is provided so as to cover a portion that is not formed, and a pattern layer and an adhesive layer are sequentially provided on the peeling layer, which are layers provided on the foil burr prevention layer. A transfer foil, wherein the pattern layer and the adhesive layer cannot be separated from the foil burr prevention layer.