JP2001239739A - Gravure printing method to shrinkable film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing method, in which neither poor pitch nor curl develops, even when printing is executed especially with water-base gravure ink on a shrinkable film. SOLUTION: This printing 3 is executed on the surface of the shrinkable film 2 after a non-shrinkable film 1 is pasted on the shrinkable film 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for performing gravure printing on a film that expands and contracts according to a printing environment or the like (hereinafter referred to as "shrinkable film").

[0002]

2. Description of the Related Art Conventionally, when printing is performed on a shrinkable film, for example, a nylon film using oil-based gravure ink, dimensional stability is lacked due to the hygroscopicity of nylon itself, and furthermore, due to the drying heat of the printing press. Since pitch failure and curling occur, it is necessary to control the humidity of the printing environment together with the film. For this reason, there is a problem that it is costly to control the humidity of the film and the printing environment, and it is still impossible to completely remove defective pitch and curl.

[0003] In aqueous gravure inks using an aqueous solvent, the tendency is that the film is exposed to the aqueous solvent and
The method of printing directly on a shrinkable film using water-based gravure ink, because the bad heat that the drying heat of the printing press is higher than that of the oil-based gravure ink overlaps, and the above-mentioned pitch failure and curl are further promoted. Has not been put to practical use.

However, printing using water-based gravure ink is expected to become the mainstream in the future due to problems such as labor working environment and air pollution caused by using oil-based gravure ink. For this purpose, there is an urgent need to develop a printing technique that uses a water-based gravure ink even for a shrinkable film.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-described problems, and has as its object to print on a shrinkable film, particularly using an aqueous gravure ink.
An object of the present invention is to provide a printing method that does not cause pitch failure or curl.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, in the gravure printing method for a shrinkable film, after bonding a non-shrinkable film to the shrinkable film, The printing is performed on the surface of the shrinkable film.

Further, in the invention according to claim 2,
According to the first aspect of the present invention, the process is performed using an oil-based gravure ink.

Further, in the invention according to claim 3,
In the invention according to claim 1 or 2, the method is carried out by using an aqueous gravure ink.

Further, in the invention according to claim 4,
In the invention described in claim 1, 2 or 3, the shrinkable film is a plastic film.

Further, in the invention according to claim 5,
In the invention corresponding to any one of claims 1 to 4, the non-shrinkable film is a plastic film.

Further, in the invention according to claim 6,
In the invention corresponding to any one of claims 1 to 4, the non-shrinkable film is an aluminum foil film.

[0012]

The shrinkable film is a film that expands and contracts depending on the environment such as humidity and temperature. A typical example is a nylon film. When printing with a water-based gravure ink on such a shrinkable film, a water-based gravure ink is directly applied to the shrinkable film after pasting, for example, a polyethylene, polypropylene, aluminum foil film or the like that does not shrink under humidity or temperature. Print using At this time, there is no change in the printing press. In addition, the printing environment may be the same conditions as when using the conventional oil-based gravure ink, and it is rather unnecessary to pay attention to the environment as compared with the conventional conditions. The printing method of the present invention performed in this manner can be applied not only to a case using an aqueous gravure ink but also to a case using an oil-based gravure ink.

[0013]

Example 1 As a shrinkable film, a shrinkable nylon (emblem DCHT, trade name of Unitika Ltd., thickness 15)
μ) as a non-shrinkable film and polyethylene (Nimura Chemical Industry Co., Ltd., trade name LL-XMTN, thickness 20μ) as an adhesive (Dainippon Ink and Chemicals, trade name LX703)
H), and printing was performed using an aqueous gravure ink under the following conditions.

[0014]

[0015]

Example 2 Using oil-based gravure ink as a printing ink,
Printing was performed under the same film and printing conditions as in Example 1 except that the drying temperature was set to 40 ° C.

[0016]

[Comparative Example 1] An aqueous gravure ink was used for a shrinkable film (trade name: DCHT, Unitika Ltd., thickness 15μ).
Printing was performed under the same printing conditions as in Example 1.

[0017]

Comparative Example 2 Printing was performed under the same conditions as in Comparative Example 1 except that oil-based gravure ink was used for printing. Table 1 shows the printing results of Examples 1 and 2 and Comparative Examples 1 and 2.

[0018]

[Table 1]

Printing was carried out under the same conditions as in Examples 1 and 2 using the following film obtained by laminating a shrinkable film and a non-shrinkable film under the same conditions as in Example 1. Was the same as in Example 1.

Shrinkable film Shrinkable nylon Mitsubishi Chemical Kojin Pax Co., Ltd. Santo Neil S S Shrink PET PET Toyobo Co., Ltd. Space clean ・ Non-shrinkable film Polyethylene Seki Phil Co., Ltd.KF201 Polypropylene Tosero Co., Ltd. GLC, GHC Toray Gosei Co., Ltd. Product name 3901 FIG. 1 shows a cross section of a printed material printed by the printing method of Examples 1 and 2. In FIG. 1, 1 is a non-shrinkable film, 2 is a shrinkable film, and 3 is printing.

[0021]

As described above, according to the present invention, when printing is performed using a gravure ink on a shrinkable film, printing is performed after a non-shrinkable film is bonded to the shrinkable film. As a result, even if printing is performed using water-based or oil-based gravure ink while setting the printing environment as before, there is no occurrence of pitch failure and curling, and particularly, high quality printed matter using the water-based gravure ink is obtained. Obtainable.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a printed matter printed according to the present invention.

[Explanation of symbols]

 1 Non-shrinkable film 2 Shrinkable film 3 Printing

Claims (6)

[Claims] 1. A gravure printing method for a shrinkable film, comprising printing a shrinkable film surface after laminating a non-shrinkable film to the shrinkable film. 2. The method of gravure printing on a shrinkable film according to claim 1, wherein the method is performed using an oil-based gravure ink. 3. The gravure printing method for a shrinkable film according to claim 1, wherein the method is performed using an aqueous gravure ink. 4. A gravure printing method for a shrinkable film according to claim 1, wherein the shrinkable film is a plastic film. 5. A gravure printing method for a shrinkable film according to claim 1, wherein the non-shrinkable film is a plastic film. 6. A gravure printing method for a shrinkable film according to claim 1, wherein the non-shrinkable film is an aluminum foil film.