JP2002264461A - Method for forming laminating pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for laminating fine patterns, improving productivity, without necessity of registering by printing. SOLUTION: The method for forming laminating patterns comprises a first step of printing a part except a predetermined pattern with an ink composition containing an aqueous solvent type resin on a base, a second step of laminating two or more layers of a coating agent composition permeable in an aqueous solvent with a component different from the ink composition, and a third step of removing the composition with the solvent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing method using an ink that can be removed later, and to a method for forming a laminated pattern having a fine structure without requiring complicated registration.

[0002]

2. Description of the Related Art Conventionally, in the field of manufacturing a display shadow mask, a conductive circuit, and the like, in order to laminate a fine structure by printing, a second print layer is formed on a first print layer. Further, in order to sequentially stack the third printing layer thereon, it is necessary to repeatedly perform a highly accurate registering operation on a printing press as a method for preventing printing misalignment. It is said that the printing accuracy of a normal gravure printing machine in consideration of the expansion and contraction of a film is limited to 40 μm. For this reason, it is actually impossible to produce a laminated pattern by printing registration.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for laminating a fine pattern, which does not require registration while printing and has improved productivity.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies and as a result,
The present inventors have found that the above problem is solved by applying a printing method using an ink that can be removed later, and have reached the present invention. That is, the present invention is a first step of printing a portion other than a predetermined pattern with an ink composition containing an aqueous solvent-soluble resin on a substrate, on the printed surface, an aqueous solvent having a composition different from that of the ink. There is provided a method for forming a laminated pattern, comprising a second step of laminating two or more layers of a permeable coating agent composition and a third step of removing an ink composition with an aqueous solvent in this order. By this method, two or more coating agent composition layers, which are stacked in the second step, are stacked without requiring registration at the position of the predetermined pattern.

[0005]

DETAILED DESCRIPTION OF THE INVENTION As described above, the present invention comprises a first step of printing a portion other than a predetermined pattern on a substrate with an ink composition containing an aqueous solvent-soluble resin, Above, a second step of laminating two or more layers of a coating agent permeable to an aqueous solvent with a resin composition different from the ink, and a third step of removing the ink composition with the aqueous solvent are in this order. The present invention relates to a method for forming a laminated pattern. Hereinafter, each component requirement will be described in detail.

The substrate used in the present invention may be either transparent or opaque. For applications to be observed from the side of the substrate opposite to the printing surface, a colorless transparent, colored transparent or translucent substrate is preferred. After forming a pattern on an opaque substrate, the pattern can be transferred to another substrate, and the transparency of the substrate is not necessarily required for such an application or.

As the material of the base material, any material can be used as long as it has the necessary durability for the solvents used in the present invention. Specifically, films such as a polyester film, a polyethylene film, and a polypropylene film are preferably used. Depending on the application, physical properties such as flexibility and rigidity can be selected.

The ink composition used in the present invention only needs to have a resin component soluble in an aqueous solvent. The aqueous solvent is a solvent containing water as a main component, and refers to a solvent that may contain an alcohol component and an alkali component. As the resin component, if it is an alkali-soluble resin, natural products such as polyvinyl alcohol, glucan mannan, and starch paste are used. An aqueous UV resin or the like may be used as long as it is soluble in an aqueous solvent.

Examples of additives that can be added to the resin for the purpose of improving printability and visibility are various organic pigments, calcium carbonate, barium sulfate, polyethylene compounds, thyroids and the like. Examples of the coloring agent include phthalocyanine blue, phthalocyanine green, carbon black, crystal violet, methyl violet, and triphenylmethane acid dyes. The amount of this type of coloring agent is from 0 to 5% by weight, preferably from about 1 to 3% by weight, based on the total weight of the ink. Other additives include defoamers, leveling agents,
Wax and the like.

[0010] Printing a portion other than the fine structure requires the ink composition and printing technique to have the same fine line reproducibility as printing the fine structure itself. Accordingly, the ink composition preferably has a thixotropic coefficient of 1.4 or more.

Examples of the printing method for leaving a fine pattern include gravure, flexo, and offset. From the viewpoint of fine line reproducibility, flexo corresponding to letterpress is preferable. Gravure is preferred for durability.

After the above-described printing is performed on a portion other than the predetermined pattern, two or more layers of a coating agent composition which is insoluble in an aqueous solvent and has permeability are laminated. Examples of the resin forming such a coating composition include a resin having a polar group such as an acrylic acid group, an amino group, and an imino group in the resin. In addition, as a resin system that can be mixed, an acrylic emulsion, a urethane emulsion, a polyester emulsion or a mixture thereof is preferably used.

The coating composition may contain various coloring agents such as pigments. When viewed from the transparent substrate side, the color of the first coating composition is observed, and when viewed from the opposite side, the color of the second coating composition is observed.

As a coating method, there are a gravure coater, a knife coater, and a roll coater.
μm is preferred.

The aqueous solvent used in the third step of removing the ink composition with an aqueous solvent may be a 1 to 4% aqueous solution of sodium hydroxide or a 1 to 6% by weight aqueous solution of potassium hydroxide.
Use at a liquid temperature of 0-60 ° C. Normal peel time is 10
A peeling speed of 90 seconds, preferably 10 to 30 seconds may be used.

After removing the ink composition, the laminated predetermined pattern can be further cured by applying a solvent containing an isocyanate component.

[0017]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.

Example 1 As a substrate, a thickness of 100 μm
Using a polyester film of the above, an aqueous solvent (in this example, hot water) soluble ink composition containing a polyvinyl alcohol resin as a main component and an addition of 3% by weight of thyroid was used. Was printed with a gap of 30 μm and a dry coating thickness of 1 μm. Then, as a first coating composition,
A mixture of an acrylic emulsion (45% solids) and 10% of carbon black was coated with a gravure coater. Next, as a second coating agent composition, the same resin system in which 30% of titanium oxide was dispersed was similarly coated to a thickness of 2 μm. After drying, the printed portion was dissolved and removed with warm water at 40 ° C. Thereafter, by heating and drying, the formed laminated grid pattern has a line width of 29 μm and a pitch of 100 μm.
μm. The grid pattern was white when viewed from the front and black when viewed from behind.

[0019]

According to the present invention, it is possible to provide a method for laminating a fine pattern suitable for mass production, which does not require registration while being printed.

Claims (4)

[Claims] 1. A first step of printing a portion other than a predetermined pattern on a substrate with an ink composition containing an aqueous solvent-soluble resin, on the printing surface, a component different from the ink composition. A method for forming a laminated pattern, comprising, in this order, a second step of laminating two or more layers of a coating agent composition permeable to an aqueous solvent, and a third step of removing the ink composition with an aqueous solvent. 2. The method according to claim 1, wherein the aqueous solvent is an alkaline agent, and the ink composition is an ink composition containing an alkali-soluble resin. 3. The substrate according to claim 1, wherein the substrate is a transparent substrate.
3. The method for forming a laminated pattern according to item 1. 4. The ink composition according to claim 1, wherein the ink composition has a thixotropic coefficient of 1.4 or more.
The method for forming a laminated pattern according to any one of the above.