JPH0966684A - Antibacterial treatment process for printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an antibacterial agent containing a coating material layer on a printing ink layer and increase the antibacterial effect against bacteria adhered to the surface by printing an optional design on the surface of a base of a matter to be printed by means of a printing ink and then applying further a coating material containing a powdery antibacterial agent thereon. SOLUTION: First, an optional design is printed on the surface of a base of a matter to be printed by using an ink of a given composition. Then a coating material containing an antibacterial agent is applied on a printing ink layer 2 thus formed to form an antibacterial agent containing a coating material layer 3. As for the method of applying the antibacterial agent containing coating material, the offset printing, the web offset printing, the gravure printing and the like are suitable. As for the antibacterial agent, an ion exchanged metallic substance such as silver having the antibacterial performance against hard-to- dissolve phosphate or an ion exchanged organic substance such as benzalconium is used. As the actual examples of the coating material, the transparent offset printing varnish, aquapack varnish and the like are used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for antibacterial treatment of printed matter.

[0002]

2. Description of the Related Art Bacteria such as Escherichia coli are liable to adhere to printed matter, which is not preferable for hygiene. Therefore, in order to keep them clean, antibacterial treatment is desired. By the way, when an antibacterial treatment is applied to a paper product or the like, it is generally considered that the antibacterial agent is allowed to soak into the paper. However, in the case of printed matter, there is a problem that the effect of the antibacterial agent is weak because the surface of the substrate of the printed matter is covered with the printing ink.

[0003]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a novel antibacterial treatment method for printed matter, which can enhance the antibacterial effect of the printed matter and can be extremely hygienic.

[0004]

In order to achieve the above object, the method of antibacterial treatment of a printed material of the present invention is such that an arbitrary design is printed on the surface of a substrate of a printed material with a printing ink in advance. From the above, a process in which a coating material to which a powdery antibacterial agent is added is further applied thereon is adopted.

[0005]

[Function] Since the antibacterial agent-containing paint layer is formed on the printing ink layer, the antibacterial agent easily acts on the bacteria attached to the surface.

[0006]

EXAMPLES An antibacterial treatment method for a printed matter (for example, a cover of a notebook) according to an example of the present invention will be described below. First, an arbitrary design is first printed on a base material of a printed material using a printing ink. As the printing ink, an ink having the following composition can be used. Pigment 15-25% Synthetic resin 25-30% Drying oil 20-25% Petroleum solvent 15-20% Film strengthening agent 1-3% Set-off prevention agent 0.5-2.5% Dryer and other solvents 1- 3%

Next, an antibacterial agent-containing paint is applied onto the printing ink layer. As a method of applying, offset printing, offset rotary printing, gravure printing and the like are preferable. Here, as the antibacterial agent, a sparingly soluble phosphate is intercalated (ion-exchanged) with a metal-based (eg, silver) or organic-based (eg, benzalkonium, cetylpyridinium) substance having antibacterial properties. Can be used.

As the paint, a transparent OP varnish (offset printing varnish), aqua pack varnish, or
It is preferred to use UV-OP varnish.

The OP varnish having the following composition is preferably used. Synthetic resin 10-40% Dry oil 10-30% High boiling point petroleum solvent 10-30% Wax 3-10%

Further, it is preferable to use an aqua pack varnish having the following composition. Synthetic resin 30-40% Isopropyl alcohol 4% or less Ethyl alcohol 4% or less Ammonia 1% or less Water 50-60%

Further, it is preferable to use the UV-OP varnish having the following composition. Acrylic oligomer 20-50% Acrylic monomer 20-50% Photoinitiator 5-10% Synthetic wax 2-10%

The above-mentioned antibacterial agent is used in an amount of 2.5 with respect to each of the above OP varnish, aqua pack varnish and UV-OP varnish.
It is preferable to add ˜50%. Further, it is preferable to add 5 to 10% of wood vinegar together with the antibacterial agent.

FIG. 1 shows a partial cross section of a printed matter which has been subjected to antibacterial treatment according to the above embodiment of the present invention. In the figure, reference numeral 1 is a base material of the printed material, reference numeral 2 is a printing ink layer formed on the base material 1 of the printed material, and reference numeral 3
Is an antibacterial agent-containing coating layer formed further on the printing ink layer 2.

[0014]

As described above, the method for antibacterial treatment of a printed matter of the present invention is such that an arbitrary design is first printed on the surface of a substrate of an object to be printed by using a printing ink, and then a powdered antibacterial agent is applied thereon. By taking the step of further applying the coating material containing the agent, the antibacterial agent easily acts on the bacteria adhering to the surface, so that the antibacterial effect of the printed matter is increased, and there is an effect of being extremely hygienic.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a printed material according to the present invention.

[Explanation of symbols]

 1 Base material for printing 2 Printing ink layer 3 Antibacterial agent-containing paint layer

Claims (1)

[Claims] 1. A printed matter, which comprises printing an arbitrary design on a surface of a substrate of an object to be printed with a printing ink in advance, and further applying a paint containing a powdered antibacterial agent thereon. Antibacterial treatment method.