JP3239230B2 - Transfer sheet and transfer method using the transfer sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to accurately transfer a required pattern to an uneven transfer surface of an article formed of a material having a relatively unstable shape such as a hollow article. The present invention relates to a transfer sheet and a transfer method using the transfer sheet.

[0002]

2. Description of the Related Art As a method for transferring an image onto a transfer surface having irregularities, for example, as disclosed in Japanese Utility Model Publication No. 5-26605, a transparent UV ink layer, a colored ink layer, and an adhesive layer are formed on a base film. Using a transfer sheet formed by laminating sequentially each layer consisting of a predetermined pattern by screen printing,
A method is known in which a pattern consisting of an adhesive layer, an ink layer, and a UV ink layer is transferred to an uneven transfer surface by applying a pattern layer surface of the base film to a transfer surface and strongly rubbing the back surface of the base film. Have been.

On the other hand, for pachinko dolls and the like found in local folk crafts and the like, Japanese paper immersed in water is attached to the surface of a mold, dried, cut in part, and the mold is extracted to form a hollow shape. Since the shape is unstable and a large load cannot be applied from the surface, it is not possible to form a pattern such as the face of a doll by printing or the like, and these dolls have a limited skill. Because it relied on hand-drawing by those who did it, productivity could not be improved.

[0004]

In the transfer method using a transfer sheet according to the prior art described above, a resin film such as a polypropylene resin is used as a base film of the transfer sheet, and thus lacks elongation and flexibility during transfer. There has been a problem that the transfer sheet cannot be surely adapted to the transfer surface having irregularities formed on the curved surface, and the required pattern cannot be accurately transferred to the irregular surface. Furthermore,
In order to transfer the colored ink layer formed on the base film to the transfer surface, it is necessary to rub with a large load from the back side of the film toward the transfer surface. Since the shape is deformed or destroyed for an unstable product, the design cannot be transferred using the above-mentioned conventional transfer sheet.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, and has as its object to improve the unevenness of an article made of a relatively unstable material such as a hollow article. The pattern layer can be made to conform to the uneven surface without applying a large external force to the transferred surface with the pattern, and the ink layer of the required pattern can be accurately transferred to the transferred surface without applying a large pressing force. It is an object of the present invention to provide a transfer sheet that can be transferred to a transfer sheet, and to provide a transfer method using the transfer sheet.

[0006]

The object of the present invention is to provide a colored ink layer formed by printing a predetermined pattern with a colored ink on one side of a base film made of a low-density polyethylene resin mixed with acrylic having a thickness of 50 to 100 microns. A transfer sheet formed by polymerizing a pattern layer composed of a hot-melt adhesive layer printed and formed in the same pattern shape on the colored ink layer is positioned toward the transfer surface of the preheated transfer object. This can be achieved by disposing the pattern layer of the transfer sheet in close contact with the surface to be transferred, and pressing the pattern layer forming portion from the back surface of the transfer sheet by an elastic member heated to the surface to be transferred.

[0007]

A low density polyethylene sheet film mixed with acrylic is used as a base film, and the thickness of the film is relatively thin, 50 to 100 microns, so that the flexibility of the base film itself is high. Since the transfer sheet extends locally and is well adapted to and adheres to the surface to be transferred, the design layer adheres well to the surface to be transferred having irregularities. In addition, since the base film has a relatively low melting point, by preheating the transfer surface, it becomes more flexible and the design layer can be securely adhered to the transfer surface. further,
Since the hot-melt adhesive layer is formed on the colored ink layer as an adhesive to transfer the colored ink layer to the transferred surface, the heat of the preheated transferred surface and the heat from the back side of the transfer sheet The heat-meltable adhesive melts due to the heat of the elastic member, so that the ink layer can be reliably transferred to the transfer surface without applying a large pressure to the transfer surface.

[0008]

According to the present invention, it is possible to adapt a transfer sheet to a transfer target having irregularities, and to transfer a colored ink layer to a transfer transfer surface without applying a large load to the transfer transfer surface. Therefore, it is possible to accurately transfer a predetermined design pattern to a geometrically unstable article made of a geometrically weak material such as a papier doll, and to improve the productivity of these articles.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, A indicates a transfer sheet of the present invention, and the transfer sheet A is composed of a base film 1 serving as a base and a design layer 2 formed on one side surface of the base film 1. I have. The base film 1 is made of a low-density polyethylene resin mixed with acrylic and has a thickness of 50 to 100 μm, and has a very high flexibility and a moderate extension. Further, the design layer 2 is formed by printing on one side surface of the base film 1 in a predetermined design shape by a normal printing method, and a polymer pattern is formed on the upper surface of the color ink layer 3 with the same design as the color ink layer 3. Of the hot-melt adhesive layer 4.

The colored ink layer 3 is formed by, for example, turning over a design to be transferred onto one side surface of the base film 1 by a screen printing machine or the like, and printing the design. As a material of the ink for forming the colored ink layer 3, an ink that gives a sufficiently strong adhesive force to the base film 1 immediately after printing, but the adhesive force decreases over time is desired. Ink can be used. If the surface of the base film 1 is subjected to a rough surface treatment such as satin finish, the surface of the color ink layer 3 after the transfer has a semi-glossy state, and is in the same state as hand-drawn, so that the appearance can be further improved.

Further, on the upper surface side of the colored ink layer 3, a hot-melt adhesive layer 4 is formed by polymerization using a printing plate having the same pattern shape as that on which the colored ink layer 3 is printed by a method such as screen printing. I have. As the adhesive constituting the hot-melt adhesive layer 4, a hot-melt adhesive that melts at a relatively low temperature of, for example, about 70 ° C. is preferable. In addition, the colored ink layer 3 is formed by a plurality of plates using a plurality of colored inks.
Is formed by printing, a plate having the same pattern as the pattern formed by all the colored ink layers 2 may be separately used as a printing plate for the hot-melt adhesive layer 4.

FIG. 2 shows the entirety of the transfer sheet A of the present invention. In this example, the design of the eyebrow 6 and the beard 7 is applied to the face portion of the folk craft 5 shown in FIG. The pattern layer 2 is formed on one side of the base film 1 as a transfer sheet for transfer formation. Although the outer shape of the base film 1 is formed in a rectangular shape with a certain margin around the design layer 2, it can be appropriately changed according to the shape of the transfer surface M. In addition, a raised nose 8 is provided at substantially the center of the face of the Daruma 5, and a slit 9 is appropriately formed around the nose 8 so as to avoid wrinkles in the base film 1 so as to avoid the design layer 2. Further, slits 10 and 10 are also formed around the base film 1 to prevent wrinkles from being generated at the periphery of the base film 1 so that the symbol layer 2 can be accurately adhered to the transfer surface M. Instead of the slit 9 or the slit 10, an opening that avoids this may be formed in a particularly large bulge or a portion having a large curvature.

Next, the transfer method of the present invention using the transfer sheet A will be described with reference to FIGS. First, before the transfer, the transfer surface M of the transfer object is preheated. As a preheating method, for example, a method in which a transfer surface M of a transfer object is arranged in a container provided with a heater so as to face the heater and the transfer surface is heated is easy. Next, as shown in FIG. 4A, the transfer sheet A described above is placed on the transfer-receiving surface M of the transfer-receiving material preheated.
Are placed and positioned so that the surface on which the symbol layer 2 is formed faces the transfer surface M, and the entire base film 1 of the transfer sheet A is placed in close contact with the transfer surface M. Base film 1
Is made of a low-density polyethylene resin mixed with acrylic having a relatively low melting temperature, so that the pre-heated transfer surface M of the base film 1 is further increased in flexibility and the uneven transfer surface. It is easy to accurately contact M.

Thereafter, as shown in FIG. 4B, a pressing die 13 provided with an elastic member 11 on the lower surface and heated by a heater 12 installed therein is pressed against the surface M to be transferred from the back side of the base film 1. , Elastic member 11
Presses the base film 1 along the concavo-convex shape of the transfer surface M, makes the hot-melt adhesive layer 4 forming the design layer 2 adhere to the transfer surface M, and presses the heat from the transfer surface M with the die. 13
Then, the heat-meltable adhesive layer 4 is brought into a molten state by the heat from the substrate, and the colored ink layer 3 is bonded to the transfer surface M. After the pressing die 13 is separated from the transfer surface M, the base film 1 is peeled off, so that the colored ink layer 3 is peeled off from the base film 1 and adhered to the transfer surface M by the adhesive layer 4, so that the colored ink layer 3 can be accurately placed on the transfer surface. The pattern is transferred and formed (FIG. 4c).

FIG. 5 shows an example of another transfer method. In this case, an elastic material 1 such as rubber is provided on the surface instead of the pressing die 13.
The colored ink layer 3 is formed by performing a rolling operation while pressing the portion where the symbol layer 2 is formed from the back side of the base film 1 toward the transfer surface M of the transfer object by using the heating roller 15 on which the transfer roller 4 is formed. Can be accurately transferred to the transfer surface.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a part of a transfer sheet of the present invention.

FIG. 2 is a plan view showing the entire transfer sheet of the present invention.

FIG. 3 shows an example of an object to be transferred which is stored by the method of the present invention.

4A and 4B schematically show an example of a transfer method according to the present invention, wherein FIG. 4A shows a state in which a transfer sheet is arranged on a preheated transfer surface, and FIG. 4B shows a state in which a base film is heated on a transfer surface. (C) is a cross-sectional view of a state in which the design is transferred to the transfer-receiving surface by pressing and contacting with a pressing die.

FIG. 5 conceptually illustrates another example of the transfer method according to the present invention, and is a cross-sectional view in which a step of pressing a transfer sheet is performed by a heated rubber roller.

[Explanation of symbols]

 A. Transfer sheet 1. Base film 2. Pattern layer 3. Colored ink layer 4. 10. Hot-melt adhesive layer Elastic member 12. Heater 13 Stamping die 14. Elastic material 15. Heating roller

Claims (2)

(57) [Claims] 1. A colored ink layer formed by printing a predetermined pattern with a colored ink on one side of a base film made of a low-density polyethylene resin mixed with acrylic having a thickness of 50 to 100 microns. And a hot-melt adhesive layer printed and formed in the same pattern shape as described above. 2. A colored ink layer formed by printing a predetermined pattern with a colored ink on one side of a base film made of a low-density polyethylene resin mixed with acrylic having a thickness of 50 to 100 microns. A transfer sheet formed by polymerizing a pattern layer composed of a heat-fusible adhesive layer printed and formed in the same pattern shape is positioned and arranged toward the transfer-receiving surface of the preheated transfer-receiving material. The colored ink layer of the transfer sheet is transferred to the transfer surface by bringing the pattern layer into close contact with the transfer surface and pressing the design layer forming portion from the back surface of the transfer sheet with an elastic member heated to the transfer surface. how to.