JPH1046089A - Printing ink composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a new printing ink composition for intaglio printing, excellent in workability and profitability, good for environments, and having a beautiful color. SOLUTION: This printing ink composition uses a glycolic solvent containing water or an aqueous emulsion in an amount of 5-50% as a solvent vehicle. The printing ink composition can solve troubles where a conventional water-soluble printing ink is left in the cells of a printing machine and where the cleaning of the left printing ink is difficult. The troubles are the defects of the conventional water-soluble printing ink used for intaglio printing. The acid value of the printing ink composition can be changed to adjust workability and drying property, thus enabling to improve air pollution, the deterioration of working environments, the generation of static electricity, etc. The printing ink composition can further be mixed with a metal powder pigment or a pearl pigment to impart a new beautiful color. The printing ink composition can be recycled without requiring a vacuum-deposited film, an aluminum foil, etc., thereby useful for preventing the generation of environmental problems due to wastes and the increase of refuses.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ink composition for intaglio printing, and an object thereof is to provide a novel printing ink composition having excellent workability, good environment, and beautiful colors.

[0002]

2. Description of the Related Art Intaglio printing, generally gravure printing, can give a great change in the thickness of a printed coating film as compared to letterpress printing. A variety of prints can be made. The inks used are toluene, xylene, IPA,
The so-called solvent type ink mainly containing a solvent such as MEK is the mainstream.

[0003]

However, the solvent type ink has problems such as air pollution due to evaporation of the solvent and a residual solvent in the printed matter. In addition, high flammability,
Since the ink is mainly composed of a non-polar solvent, static electricity is easily generated and there is a high risk of ignition. Static electricity charges printed matter with the danger of ignition. The charged prints attract each other and significantly reduce the workability. Due to such a problem, the use of aqueous ink has been studied.

[0004] However, attempts have been made to make water-based, but many problems have occurred, such as poor transfer of the ink that has entered the recesses (in the cells) of the plate to the printed matter, and the solidification of the ink that has accumulated in the cells, which is difficult to remove. Challenges exist. SUMMARY OF THE INVENTION An object of the present invention is to provide an intaglio ink composition that has good ink removal and cleaning properties, has good transfer to printed matter, generates little static electricity, and is environmentally friendly. The present invention is intended to provide an ink that is particularly effective as a printing ink for paper.Furthermore, an ink mixed with a metal powder pigment, a pearl pigment, and the like, is used for a vapor-deposited film that cannot be recycled conventionally. It is another object of the present invention to provide a recyclable printed material as an alternative to a bonded product.

[0005]

Means for Solving the Problems The present invention uses a glycol-based solvent containing water or an aqueous emulsion in an amount of 5% to 50% as a solvent for a vehicle, thereby reducing the drawbacks of the water-soluble ink used in conventional intaglio printing. This solves the problem of remaining ink in the cell and the difficulty of cleaning.

Alternatively, the workability and the drying property can be adjusted by using less than an equivalent amount of alkali relative to the vehicle resin of the ink composition and the compound having an acid value of the glycol-based solvent. By using the above ink composition, it is possible to overcome the disadvantages of the conventional solvent type, such as air pollution and deterioration of the working environment, the danger of ignition, and the generation of static electricity. It is intended to improve the decrease in metastatic property. Furthermore, a new and beautiful color can be provided by mixing a metal powder pigment and a pearl pigment.

[0007] Conventionally, there are paper containers and the like having aesthetic properties by laminating a vapor-deposited film or aluminum foil. However, since they cannot be recycled, resources are wasted and environmental problems occur due to increased dust. Intaglio printed matter made of ink mixed with metal powder pigments and pearl pigments can be used as a substitute for those using vapor-deposited films and the like, and can contribute to solving resource and environmental problems. In addition, unlike in the case of laminating a vapor-deposited film, in intaglio printing, an arbitrary pattern can be printed, and a printed matter excellent in aesthetics can be obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION 【Example】

Example 1 Marquid 32 60 parts (Rosin maleic acid resin manufactured by Arakawa Chemical Co., Ltd.) Ethylene glycol 30 parts Triethanolamine 10 parts 100 parts By the above blending, varnish A was dissolved in a reaction vessel at 160 ° C. .

[0009] Marquid 3002 20 parts (Rosin maleic acid resin manufactured by Arakawa Chemical Co., Ltd.) Joncryl 67 20 parts (Acrylic resin manufactured by Johnson Wax Co.) 54 parts of diethylene glycol 6 parts of diethanolamine １００ 100 parts 180 ° C. And dissolved to prepare Varnish B. Using this varnish B, a base ink A was produced with the following composition using three rolls.

[0010] 30 parts of Lionol Blue B302 (Cyanine Blue Pigment, manufactured by Toyo Ink Co., Ltd.) Varnish B 70 parts １００ 100 parts Ink A was produced using varnish A and base ink A. Base ink A 48 parts Varnish A 48 parts Chemipearl W-400 4 parts [Wax water dispersion (solid content 40%) manufactured by Mitsui Petrochemical Co., Ltd.] Water 20 parts １２０ 120 parts Ink A has a viscosity of 52. Poise, 20 ° C.

Example 2 John Krill 67 30 parts Water 62 parts 28% ammonia water 6 parts Diethanolamine 2 parts ─────── 100 parts The above mixture was dissolved with a disperser stirrer to prepare Varnish C.

Ink B was prepared from varnish C, varnish A prepared in Example 1 and base ink A in the following composition. Base ink A 30 parts Varnish A 26 parts Varnish C 40 parts Chemipearl W-400 4 parts ─────── 100 parts Ink B had a viscosity of 45 poise and 20 ° C.

Example 3 Base ink A 10 parts Varnish C 16 parts Joncryl 74J 30 parts [Styrene acrylic emulsion (solid content: 45%) manufactured by Johnson Wax Co.] Ethylene glycol 20 parts Water 20 parts Chemipearl W-400 4 parts １００ 100 parts The above composition was stirred with a despar to produce Ink C. Ink C had a viscosity of 300 centipoise and 20 ° C.

Example 4 Ink C 100 parts Aluminum powder 10 parts 部 110 parts The above composition was dispersed and stirred to form ink D. The viscosity of the ink D was 300 centipoise and 20 ° C.

Example 5 Ink C 100 parts Iriodin 100 20 parts (Pearl Pigment Merck Co., Ltd.) 120 parts The above composition was dispersed and stirred to obtain Ink E. The viscosity of the ink E was 400 centipoise and 20 ° C. When the inks A to E were printed on a cardboard using a sheet-fed gravure printing machine (manufactured by Hirose Iron Works), good prints were obtained in all cases.

[0016]

The present invention provides a glycol solvent type ink which is excellent in workability in intaglio printing, and measures conversion from a solvent type ink to reduce air pollution, reduce the risk of ignition, and reduce the generation of static electricity. It contributes to prevention and removal, improvement of working environment, and replacement of vapor-deposited film and aluminum foil, etc., facilitates material recycling, contributes to resource protection and reduces waste.

Claims (4)

[Claims] 1. A printing ink composition comprising an intaglio printing ink, wherein a glycol-based solvent containing 5% to 50% of water or an aqueous emulsion is used as a vehicle solvent. 2. An intaglio printing ink, wherein a metal powder pigment and a pearl pigment are mixed in a printing ink composition using a glycol-based solvent containing 5% to 50% of water or an aqueous emulsion as a vehicle solvent. A printing ink composition comprising: 3. An intaglio printing ink, wherein the acid value of the vehicle resin of the printing ink composition using a glycol-based solvent containing 5% to 50% of water or an aqueous emulsion as the vehicle solvent, and the acid value of the glycol-based solvent are determined. A printing ink composition comprising less than equivalent amounts of an alkali and a pigment with respect to the blended composition. 4. The printing ink composition according to claim 3, wherein a metal powder pigment and a pearl pigment are mixed in the intaglio printing ink.