KR100237167B1 - Ink-transfer film - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer film in which only a printing ink layer is transferred to an adherend. In the transfer film printed with a gravure printing method, a printing pattern (3) having a predetermined pattern or pattern is printed on the support (1). The printing ink layer 3 is formed with the ink whose adhesive force with respect to the to-be-adhered object of (3) becomes stronger than the adhesive force with the support body 1, and also between the said support body 1 and the printing ink layer 3 is carried out. An ink separation layer 2 is formed on the printing ink layer 3, and the printing ink layer 3 is formed of ink such that the adhesion force of the printing ink layer 3 to the adherend is stronger than that of the ink separation layer 2 and the support 1. It is formed.

In the transfer film of the present invention, the printing ink layer 3 is formed on the support 1, or the ink separation layer 2 is formed on the support 1, and then the printing ink layer 3 is formed to produce the transfer film. By forming a stronger adhesion with the adherend of the printing ink layer 3, only the printing ink layer 3 is adhered to the adherend when transferring to the adherend, thereby providing a clear transfer, thereby improving the quality of the product. have.

Description

The transfer film transfers only the printing ink layer to the adherend

The present invention relates to a transfer film in which only a printing ink layer is transferred to an adherend, and in particular, a printing ink layer in which a predetermined pattern and pattern are printed by a gravure printing method has stronger adhesion to the adherend than adhesion to a support or an ink separation layer. The present invention relates to a transfer film in which only a printing ink layer is transferred to an adherend to be adhered to an adherend with a printing ink layer itself by using an adhesive force of the printing ink layer without using an adhesive layer unlike an existing transfer paper.

Conventional printing methods for printing on flat or circular adherends include screen printing, pad printing, paper transfer printing, film transfer printing, and the like. In addition, screen printing and pad printing methods are widely used for transfer printing methods due to problems such as reproducibility of patterns or patterns, productivity according to drying time for each color, and in particular, printing pints in the case of circular adherends. The characteristics of transcription printing are well represented in the call.

However, in the conventional transfer printing, when transferring using a transfer paper having a release agent layer, a printing ink layer, and an adhesive layer formed on a supporting layer such as paper or film, the release layer is separated or transferred to transfer to a deposit. In the case of the transparent ink for the space other than the printing ink layer, the temperature resistance and weather resistance are deteriorated even if the transparency is maintained, and in the case of a baby bottle, in particular, it becomes opaque during sterilization and disinfection by hot water. Even in the case of partial transfer, the quality of the product is remarkably degraded because the release film layer is visible. In the case of paper transfer, the material used as the release agent layer is a wax, which has a disadvantage in that the release agent layer is separated even by nails or a small force.

In the past, many efforts have been made to solve such problems, but in some cases, the transfer method by screen printing using a support body and the partial printing of the release agent layer and the adhesive layer can be used to reduce the release agent layer and the adhesive layer transfer part as much as possible. It is the situation that employs a transfer film. This works by taking into consideration unnecessary things such as color reproduction and work process, which are disadvantages of the screen.

The present invention was devised to solve the above-mentioned defects and problems of the above-mentioned release agent layer and the decrease in transparency caused by the adhesive layer, and based on the film transfer method excellent in the reproducibility and workability of printed matters, more convenient workability and release agent. An object of the present invention is to provide a transfer film in which only a printing ink layer is transferred to an adherend which can solve the problem of layer transition. In other words, the transfer film is obtained by removing the adhesive layer and obtaining the effect of printing directly on the adherend by using the adhesive strength of the ink itself.

1 is a cross-sectional view of the transfer film according to an embodiment of the present invention.

2 is a cross-sectional view of a transfer film according to another embodiment of the present invention.

3 and 4 are explanatory views of transfer operations using the transfer films of FIGS. 1 and 2.

5 and 6 are plan views and transfer operation explanatory diagrams of a general hot stamping transfer film.

* Explanation of symbols for main parts of the drawings

1 support 2 ink separation layer

3: printing ink layer 4: adherend

5: release agent layer 6: adhesive layer

Hereinafter, described in detail by the accompanying drawings of the present invention as follows.

1 is a cross-sectional view of the transfer film according to the present invention, and as shown therein, a printing ink layer 3 is formed on a support 1 such as a film.

2 is a cross-sectional view showing another embodiment of the transfer film according to the present invention. As shown therein, an ink separation layer 2 is formed on a support 1, and a printing ink layer (2) is formed on the ink separation layer 2. 3) has a formed configuration.

According to the present invention, the printing ink layer 3 is directly formed on the support 1 as shown in FIG. 1, or the ink separation layer 2 is formed as shown in FIG. 2, and the printing ink layer 3 is formed on the ink separation layer 2 as shown in FIG. The printing ink layer 3 is formed by a gravure printing method to complete the transfer film. This is characterized in that the adhesive layer is not formed, and the printing ink layer exerts the adhesive force, so that the effect of printing the ink directly on the adherend during transfer can be obtained.

In this case, as the synthetic resin film on the support 1 used, a film coated with polyester, polypropylene, cellophane, polyvinylidene chloride, polyvinylidene chloride, polycarbonate, polyteraflouroethylene (PTFF), poiyimide (PI), PEEK ( It is recommended to use a film that can withstand temperatures of 200 ° C during transfers such as polyyetheretherketone (PEI) and polyetherimide (PEI), but films that can withstand lower temperatures may be used depending on the working conditions.

When the ink separation layer 2 is formed on the selected support 1 as described above, the synthetic resin used as the release layer is different from the release agent layer of the transfer film, which has been used until now, in which the release agent layer of the transfer film is transferred and separated from the support. ) And the support 1 should be strong.

On the ink separation layer 2 thus formed, a printing ink layer 3 is formed by using gravure printing, using acrylic ink, vinyl chloride ink, vinyl acetate ink, initial ink, amide ink, and urethane ink. At this time, the material of the printing ink layer 3 should be weakly adhered to each other using a material that is incompatible with the support 1 of FIG. 1 or the ink separation layer 2 of FIG. 2. .

In other words, whether the ink separation layer 2 is formed or not is formed, the adhesion strength with the printing ink is in accordance with the General Test Method for Adhesive Strength KS M 3718 as defined in Korean Industrial Standards and the Test Method for Peeling Adhesive Strength KS M 3725. By 500 g / in or less.

This is evaluated by peeling the tape by the Cross Hatch method (adhesion test method which divides 100 spaces on the substrate at intervals of 1m / m or 2m / m) for both the transfer ink product and the directly printed product. The difference between the adhesion of the ink layer to be printed on the support or the ink separation layer is to be transferred to the printing ink layer and the strong adhesive force during transfer. In other words, if the adhesion between the support or the ink separation layer and the printing ink layer is 500 g / in or less, and the adhesion of the print ink layer and the adherend is stronger (at least 700 g / in or more), the part to be separated or adhered during transfer is It is to be distinguished.

Therefore, the transfer film formed as shown in FIGS. 1 and 2 has only a printing ink layer 3 separated and adhered to the adherend 4 when transferring to the adherend 4 as shown in FIGS. 3 and 4. Clear transfers, such as those printed directly on a complex, can be achieved, thereby improving quality over conventional transfer products.

Such an embodiment of the present invention is as follows.

Example 1

An ink separation layer 2 is formed by using a polyester film (processing degree; 38 dyne / cm or more) 12-25u as a support (1) film, and the ink separation layer (2) has a low density by extrusion coating method. The thickness of the polyester is 10 u. At this time, in order to increase the adhesive strength of the film and the ink separation layer (2), a urethane anchor coating (anchorcoating) agent is used. Urethane-based anchor coating agent is a two-component adhesive using a crosslinking reaction with polyisocyanate.

Theme A-310-50 part (日本 武田 藥品 (株))

Hardener A-3-6 part (日本 武田 藥品 (株))

Solvent 44 part

With the composition as described above, the coating of about 3-5 g / m ² as a solid on the support (1) in the gravure method and extrusion coating low-density polyethylene thereon. This composition consists of / support film / anchor coating adhesion / low density polyethylene / this extrusion coating process. The adhesion of is to obtain a complete film. After the film and the ink separation gap are completed, the transfer film is completed by printing the printing ink layer 3 by the gravure printing method with the ink of the following composition on the ink separation layer.

Printing ink

Ethylene Vinyl Acetate (VA 40%) 3-10

Copolymer Resins of Vinyl Isobutyl Ether and Vinyl Chloride 10-60

Pigment 15-20

Ethylene Wax 1-10

(3) The above numerical value defines the total mixing amount as 100, and indicates the upper and lower limits at which each component can be used, and each component should be mixed so as not to exceed the upper limit and the sum of the sums does not exceed 100. .

And, the solvent is used by mixing in the range of 60-80% of the above solid content.

In more detail, examples of the ink composition for producing a transfer film for PET bottles or SAN resin injection molding

Ethylene Vinyl Acetate (VA 40%) 5 pat

Copolymer resin of vinyl isobutyl ether and vinyl chloride 20 pat

Organic Pigment 12 pat

Ethylene wax 1.5 pat

Organic solvent 61.5 pat

Example 2

In the case of a film produced by printing the printing ink layer 3 directly on the support 1, a transfer film is manufactured by gravure printing on a polyester film (not corona treated) with an ink having the following composition.

Printing ink

Acrylic resin 10-25

Pigment 8-15

Fatty Acid Amide 2-15

Ethylene Wax 0.2-10

(3) The above numerical value defines the total mixing amount as 100, and indicates the upper and lower limits at which each component can be used, and each component should be mixed so as not to exceed the upper limit and the sum of the sums does not exceed 100. .

In addition, the solvent is used by mixing in the range of 50-75% of the above solid content.

In more detail, the ink composition used in acrylic resin injection molding, polycarbonate containers, etc.

Acrylic resin 20 part

Organic Pigments 12 part

Fatty Acid Amide 2.0 part

Ethylene wax 0.3 part

Organic Solvents 63.7 part

As in the embodiment described above, the present invention is a printing ink layer 3 is separated from the support 1 or the ink separation layer 2 during transfer by gluing ink and printing, so that only printing ink without a release agent layer or an adhesive layer is present. The effect of being transferred to the adherend and printed directly on the adherend can be obtained.

In the transfer film of the present invention as described above, the printing ink layer 3 is formed on the support 1, or the ink separation layer 2 is formed on the support 1, and then the printing ink layer 3 is formed to be transferred. While manufacturing the film, the adhesive force with the adherend is formed without forming an adhesive layer by using the adhesive force of the printing ink layer 3, so that only the printing ink layer 3 is adhered to the adherend when transferring to the adherend, thereby providing a clear transfer. Thereby, there is an advantage to improve the quality of the product.

In other words, in case of hot transfer foil (Hot-Stamping Foil), it is composed of / ① film / ② release agent layer / ③ printing ink layer / ④ adhesive layer / only the film that is the support during transfer is separated, and / release agent layer / printing on the adherend As the ink layer / adhesive layer / is transferred, the release agent layer and the adhesive layer transferred to the adherend are distributed in a wider range than the pattern or pattern of the printing ink layer, so that the transparency of the transparent container is lost and the film is formed to be visible. have. In addition, when disinfecting with boiling water in a dish container, the release agent layer and the adhesive layer are whitened by moisture, and the transparency is remarkably degraded, and sometimes the membrane is separated due to the melting point of the adhesive.

As described above, in the present invention, a release layer may be formed, but the transfer layer does not transfer at all to the adherend except for the purpose of separating the ink, and is adhered to the ink alone without the adhesive layer. Transparency can be maintained and direct printing effects can be obtained.

Although the embodiments of the present invention have been described so far, the present invention is not limited thereto, and various embodiments which can be modified and changed within the true spirit and scope of the principles described and claimed are within the protection scope of the present invention. You will have to understand.

Claims (2)

In the transfer film which printed the printing ink layer 3 of predetermined pattern or pattern on the support body 1 by the gravure printing method, the adhesive force with the to-be-adhered object of the printing ink layer 3 is stronger than the adhesive force with the support body 1 A transfer film in which only a printing ink layer is transferred to an adherend, which is formed by forming a printing ink layer (3) with the ink to be formed without an adhesive layer. An ink separation layer (2) is formed between the support (1) and the printing ink layer (3), and the adhesive force of the printing ink layer (3) with the adherend is increased. A transfer film in which only a printing ink layer is transferred to an adherend, characterized in that the printing ink layer (3) is formed with an ink that is stronger than the adhesion between the substrate and the support (1).