JPH09201565A - Production of stripe pattern coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop uneven stripe patterns on a surface by a simple process treating the surface of coated raw paper becoming a base material to make the same cationic and coating the cationic surface with an anionic coating soln. to coagulate the coating soln. at a boundary part. SOLUTION: In producing strip pattern coated paper good in printability, a cationic coating soln. 6 is applied to a base material 1 composed of paper or plastics as a lower layer and, after the coated base material is dried at 100-130 deg.C for 1-5sec, an anionic coating soln. 2 with wet tension of 0-16dyne/cm is applied thereon by a gravure coater or a Mayer bar coater and the upper and lower coating layers are rapidly gelled at the boundary surface part thereof. By this method, uneven stripe patterns are developed on the coated surface. At this time, as the cationic coating soln. 6, a soln. containing a cationic polymer and/or a cationic additive is used and, as an anionic coating soln. 2, a soln. containing an anionic polymer and/or an anionic additive is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating material having a beautiful streak pattern, and more particularly to a streak pattern coated paper having good printability. For example, an anionic coating solution is coated with a cationic coating layer. The present invention relates to a method for producing a coated paper in which after coating on a base material having a gravure coater or a Meyer bar coater, the coating is solidified at a boundary with a cationic coating layer to develop an uneven streak pattern on the surface.

[0002]

2. Description of the Related Art A variety of techniques have been conventionally used in the art to enhance the design of a paper by patterning it by processing the paper, and this has been actively carried out industrially. Among them, embossing in which a paper roll surface is provided with an uneven mold is often used, and coated paper is also embossed.

The embossing roll is a method in which a pattern is engraved on the roll surface in an uneven manner, and the base material is pressed by the embossing roll to develop an uneven pattern on the base material. Although the printing suitability is superior to that of the coated paper, the design is poor due to the smoothness, and thus the design is improved by embossing.

However, when embossing is performed on the coated paper, the depression becomes deep, and a corner is easily formed on the bottom of the depression. When printing is performed on the embossed paper, the ink does not sufficiently adhere to the bottom of the depression, and the printing density is low. Does not go up.

[0005]

Therefore, there is a demand for the development of a coated paper excellent in design and printability.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, the surface of a base paper for coating has been cationized, and an anionic coating solution has been applied to the upper layer. The present inventors have found a production method in which a coating liquid is solidified at a boundary by applying the liquid, thereby producing a streak pattern having irregularities on the surface, thereby completing the present invention.

That is, the coated patterned paper of the present invention is characterized by using a cationized substrate and an anionic coating liquid.

Hereinafter, the present invention will be described.

In the present invention, a cationic coating liquid is used.

As the cationic coating liquid, those used for coating ordinary paper or other base materials can be used, and typically, cationic polymers, other polymers, solvents or dispersion media, additives Etc. Instead of the cationic polymer, or together with the cationic polymer, an additive such as a cationic surfactant may be used.

Examples of the cationic polymer and other polymers include an amino resin, an acrylic resin, a styrene resin, a butadiene resin, a polyamide resin and an epoxy resin. The cationization is performed by quaternary ammonium chloride, Mannich reaction. It can be obtained by:

[0012] Cationic starch, cationic PVA, cationic latex and the like are also used as cationic polymers.

The other polymer is preferably a nonionic polymer.

In this case, it is not preferable to use an anionic binder because the anionic binder may react with the cationic resin depending on the added amount or the compatibility thereof to cause thickening or gelation.

[0015] Cationic fiber-reactive compounds used in dyeing fiber materials can also be used.

In addition to the cationic polymer, alumina hydrate using water as a dispersion medium can be used as the cationic additive. This is an alumina colloid of 5 to 200 μm, and alumina itself is strongly charged to cations, and thus has high reactivity with an anionic coating liquid.

The above cationic resin is mixed with a solvent or a dispersion medium to prepare a cationic coating liquid.

In preparing the coating solution, a filler may be used in combination. The coating filler used in combination is not particularly limited, and kaolin clay, light calcium carbonate, heavy calcium carbonate, satin white, talc, barium sulfate,
Fillers used for general coated printing paper such as aluminum hydroxide, titanium oxide, and plastic pigment can be used.

The coating liquid used in the cationic coating layer of the present invention is prepared by mixing the above-mentioned cationic polymer, solvent, coating filler and the like. At this time, 5 to 50 parts by weight, preferably 10 to 30 parts by weight of the cationic polymer is used in 100 parts by weight of the coating liquid.
Parts by weight.

If the amount is less than 5 parts by weight, the cationicity of the coating layer is insufficient and the anionic coating solution cannot be solidified. If the amount is more than 50 parts by weight, the effect is saturated and is not economically preferable. That's why.

Coating aids such as a crosslinking agent, an antifoaming agent, a thickener, and a water-proofing agent can be used as appropriate. For preparing the coating liquid, a stirrer such as various mixers, kneaders, ball mills and the like can be appropriately used according to the composition of the coating liquid.

The substrate used in the present invention is not limited to paper but may be plastic or the like.

The raw material of the paper is not particularly limited, and various types of wood pulp, non-wood pulp, and synthetic pulp may be used alone or as a mixture, and the coated paper of the present invention may be used as a base paper. Is applied on both sides or one side of the base paper.

The cationic coating liquid can be coated by using an air knife coater, a roll coater, a bar coater, a rod coater or the like by appropriately using various known coating apparatuses.

The amount of coating on one side is 3 to 3% by dry weight.
20 g / m ^2, preferably in the range of 5 to 10 g / m ^2. If it exceeds 20 g / m ² , the effect of coating is saturated and excessive coating is not economically preferable, and if it is less than 3 g / m ² , the effect of coating cannot be obtained.

100 to 130 after applying the cationic coating solution
Dry for 1-5 seconds at ° C.

Next, an anionic coating liquid is applied to the upper layer of the substrate having the cationic coating layer obtained by the above method.

As the anionic coating liquid, those used for coating ordinary paper or other substrates can be used, and typically, anionic polymers, other polymers, solvents or dispersion media, additives Etc. Instead of the anionic polymer, or an additive such as an anionic surfactant may be used together with the anionic polymer.

Examples of the anionic polymer and other polymers include an amino resin, an acrylic resin, a styrene resin, a butadiene resin, a polyamide resin, an epoxy resin and the like. Representative.

The other polymer is preferably a nonionic polymer.

The anionic coating liquid includes fillers used for general coated papers such as kaolin clay, light calcium carbonate, heavy calcium carbonate, satin white, talc, barium sulfate, aluminum hydroxide, titanium oxide, and plastic pigment. Can be used.

Coating auxiliaries such as a crosslinking agent, an antifoaming agent, a thickener, and a waterproofing agent can be used, and can be used as appropriate. For preparing the coating liquid, a stirrer such as various mixers, kneaders, ball mills and the like can be appropriately used according to the composition of the coating liquid.

Since the higher the anionicity of the anionic coating liquid, the more easily it solidifies at the boundary with the cationic coating layer, the addition of an alkali salt such as sodium hydroxide makes the anionic coating liquid more effectively coagulated. move on.

The standard of solidification can be easily determined by previously mixing the anionic coating liquid with the cationic coating liquid.

When the anionic coating liquid is laminated on the cationic coating layer, it is preferable to use a gravure coater or a Meyer bar coater as a coating apparatus in order to develop a streak pattern having a higher designability.

The gravure coater is a coating apparatus for coating using a gravure roll in which a gravure cell is engraved on the roll. In normal gravure coating, the viscosity, water retention, and fluidity of the coating liquid are controlled to flatten the coating liquid and eliminate unevenness in the coating film.However, a gravure coater generates a gravure pattern. This is easy to become a streak.

When the base paper 1 is directly coated with a gravure coater to develop a streak pattern, the wettability of the coating liquid 2 is poor due to the size effect of the base paper used for the base material. Since the contact angle is large, the corner 3 is likely to be formed at the bottom in the concave portion, and the ink receptivity is poor. In addition, unevenness occurs at the time of printing due to the presence of the coated convex portions and the non-coated concave portions 4 (FIG. 1).

When a coated paper coated with a general anionic coating liquid is used as a substrate, the coating liquid after coating is flattened 5 due to the good wettability between the substrate and the coating liquid. No pattern appears (FIG. 2).

However, the coated paper of the present invention is prepared by coating a base material with a cationic coating solution, so that the anionic coating solution applied to the upper layer solidifies and is rapidly immobilized. The working liquid does not flatten and a streak pattern appears.

Further, since the cationic coating layer and the anionic coating liquid 6 have good wettability and a small contact angle, no corners are formed at the bottom of the concave portion and ink receptivity is good, and the base material is coated on the entire surface. Since it is processed, there is no printing unevenness and there is no problem in the print finish (FIG. 3).

A Meyer bar coater can be used as well as a gravure coater. The Meyer bar is formed by spirally winding a continuous thin wire around a small-diameter cylinder. The bar is placed at a certain distance on the coating surface, and the surplus coated by the gap setting method is measured.

The coating liquid remaining on the base material has contours corresponding to the peaks and valleys of the wire, and reduces the flow of the coating liquid with fluidity. However, when fluidity is imparted, uneven streak patterns are not developed, and when fluidity of the coating liquid is deteriorated, coating aptitude falls and workability is reduced.

However, as in the case of using a gravure coater, the coated paper of the present invention solidifies the anionic coating liquid applied to the upper layer by coating the base with a cationic coating liquid. Since it is immobilized rapidly, a streak pattern appears without being affected by fluidity, and there is no problem in workability.

In order to develop an uneven streak pattern having no corners at the bottom of the recess, the wettability between the cationic coating layer of the substrate and the anionic coating liquid is important. In order to develop a streak pattern on the coating surface, it is better that the anionic coating liquid does not wet and the coating liquid does not flatten.

This means that the cationic coating layer of the substrate and the anionic coating liquid have low wettability. At this time, the contact angle (θ) of the anionic coating liquid formed on the cationic coating layer is low. ) Is large and tends to have high water repellency.

However, if the contact angle is large and the degree of water repellency is high, corners are likely to be formed at the bottom of the concave portion of the stripe pattern, and repelling occurs during coating, making it difficult to develop a continuous stripe pattern, and at the same time, coating aptitude decreases. I do.

Conversely, when the coating liquid has good wettability and the coating liquid is flattened, the unevenness of the coating film formed at the time of coating is reduced during drying, and no unevenness pattern appears.

For this reason, there is no problem in the coating, and in order to form the uneven coating layer by controlling the flattening of the coating solution, the contact angle is preferably set to 80 to 110 °.

If the contact angle is less than 80 °, the flattening proceeds and no uneven pattern can be formed. If the contact angle exceeds 110 °, a corner is easily formed at the bottom of the concave portion and the printability is poor.

In order to satisfy the above conditions, the surface tension (γ) of the anionic coating liquid is important. If the surface tension is high, streaks are likely to occur, but the coating suitability is poor. Conversely, if these are low, leveling tends to occur and no streaks are generated.

The surface tension of the anionic coating liquid is from 40 to 60 dyne /
A range of cm is preferred.

Here, the wet tension (F = γ) defined by the contact angle (θ) and the surface tension (γ) of the anionic coating liquid.
(cos θ) is preferably 0 to 16 in the present invention.

When the anionic coating liquid is applied, it solidifies and becomes immobilized at the boundary with the cationic coating layer, so that the flattening of the coating liquid is remarkably reduced, leaving streaks formed at the time of coating. A coating layer is formed as it is. The uneven pattern formed at this time is hardly formed with a corner at the bottom in the concave portion, has a high ink density at the time of printing, and is excellent in printability.

[0054]

Example 1 <Preparation of Coating Solution for Cationic Layer> Cationic resin (one company,
UX-101, 100 parts by weight of acrylic resin having quaternary polyammonium), 75 parts by weight of cationic PVA (Kuraray, CM-318), polyamide resin (Sumitomo Chemical, Sumireze Resin 636, waterproofing agent) ) 7.
A coating solution consisting of 5 parts by weight was prepared to prepare an aqueous solution having a solid content of 7.3%.

<Preparation of Coating Solution for Anion Layer> 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Rope Lake HP-91), esterified starch (Shikishima) Starch, Mermaid MC3000) 5.3 parts by weight,
Styrene-butadiene latex (Sumitomo Dow, SN-3
07) 19.4 parts by weight of a polyamide resin (Sumitomo Chemical,
A coating solution comprising 1 part by weight of Sumireze resin 636), 1 part by weight of sodium polycarboxylate (Sanyo Kasei, Carribbon L400) and 10 parts by weight of a 20% solution of caustic soda was prepared.
A 38.1% solids aqueous solution was made.

First, the cationic layer coating solution was weighed at 127.9 g.
/ M ² , Beck smoothness 8.1 seconds, density 0.722 g /
18 g / m ² (wet) on one side was applied to m ³ base paper and dried to prepare a coated paper.

Further, an anion layer coating solution was applied to the coated paper by using a Meyer bar so that the coating solution was laminated on one side of the cationic layer.
g / m ² (wet) was applied and dried to prepare a multi-layer coated paper.

[0058]

Example 2 <Preparation of Coating Solution for Cationic Layer> Quaternary polyammonium compound (Bayer, Levogen FWN) 150 per 100 parts by weight of light calcium carbonate (Shiraishi Kogyo, Shiraishi Hana PZ)
Parts by weight, polyvinyl alcohol (Kuraray, CM318)
A coating liquid comprising 15 parts by weight and 1 part by weight of a polyamide resin (Sumitomo Chemical, Sumirezu Resin 636) was prepared to prepare an aqueous solution having a solid content of 28.3%.

<Preparation of Coating Solution for Anion Layer> 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Rope Lake HP-91), esterified starch (Shikishima) Starch, Mermaid MC3000) 5.3 parts by weight,
Styrene-butadiene latex (Sumitomo Dow, SN-3
07) 19.4 parts by weight of a polyamide resin (Sumitomo Chemical,
A coating solution comprising 1 part by weight of Sumireze resin 636), 1 part by weight of sodium polycarboxylate (Sanyo Kasei, Carribbon L400) and 10 parts by weight of a 20% solution of caustic soda was prepared.
A 38.1% solids aqueous solution was made.

First, the cationic layer coating solution was weighed at 127.9 g.
/ M ² , Beck smoothness 8.1 seconds, density 0.722 g /
18 g / m ² (wet) on one side was applied to m ³ base paper and dried to prepare a coated paper.

Further, an anion layer coating solution was applied to the coated paper using a Meyer bar on one side of the cation layer so as to be laminated on the cation layer.
g / m ² (wet) was applied and dried to prepare a multi-layer coated paper.

[0062]

Example 3 <Preparation of Coating Solution for Cationic Layer> 100 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121) was added to a cationic resin (Daiichi Kogyo Seiyaku, Sharol DC-).
902P) 25 parts by weight, cationic PVA (Kuraray, C
M-318) was prepared as a coating liquid comprising 15 parts by weight and 1 part by weight of a polyamide resin (Sumitomo Chemical, Sumireze Resin 636) to prepare an aqueous solution having a solid content of 28.3%.

<Preparation of Coating Solution for Anion Layer> 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Rope Lake HP-91), esterified starch (Shikishima) Starch, Mermaid MC3000) 5.3 parts by weight,
Styrene-butadiene latex (Sumitomo Dow, SN-3
07) 19.4 parts by weight of a polyamide resin (Sumitomo Chemical,
A coating solution comprising 1 part by weight of Sumireze resin 636), 1 part by weight of sodium polycarboxylate (Sanyo Kasei, Carribbon L400) and 10 parts by weight of a 20% solution of caustic soda was prepared.
A 38.1% solids aqueous solution was made.

First, the cationic layer coating solution was weighed at 127.9 g.
/ M ² , Beck smoothness 8.1 seconds, density 0.722 g /
18 g / m ² (wet) on one side was applied to m ³ base paper and dried to prepare a coated paper.

Further, an anion layer coating solution was applied to this coated paper using a Meyer bar on one side such that the coating solution was laminated on the cation layer.
g / m ² (wet) was applied and dried to prepare a multi-layer coated paper.

[0066]

Example 4 <Preparation of Coating Solution for Cationic Layer> 100 parts by weight of heavy calcium carbonate (Fimatec FMT-90C), 5 parts by weight of alumina colloid (Nissan Chemical, alumina sol 200), cationic PVA (Kuraray, 117H) 12.5 weight capital,
Polyamide resin (Sumitomo Chemical, Sumireze Resin 63
6) Prepare a coating solution consisting of 1.5 parts by weight,
A 3.8% aqueous solution was made.

<Preparation of Coating Solution for Anion Layer> 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Rope Lake HP-91), esterified starch ( Shikishima Starch, Mermaid MC3000) 5.3 parts by weight,
Styrene-butadiene latex (Sumitomo Dow, SN-3
07) 19.4 parts by weight of a polyamide resin (Sumitomo Chemical,
A coating solution comprising 1 part by weight of Sumireze resin 636), 1 part by weight of sodium polycarboxylate (Sanyo Kasei, Carribbon L400) and 10 parts by weight of a 20% solution of caustic soda was prepared.
A 49.1% solids aqueous solution was made.

First, 127.9 g of the cation layer coating solution was weighed.
/ M^Two, Beck smoothness 8.1 seconds, density 0.722 g /
m^Three 18g / m on one side of base paper^Two(Wet) coating dry
Then, a coated paper was created.

Further, an anion layer coating solution was applied to the coated paper using a Meyer bar on one side of the coating layer so as to be laminated on the cationic layer.
g / m ² (wet) was applied and dried to prepare a multi-layer coated paper.

[0070]

Example 5 <Preparation of Coating Solution for Cationic Layer> 100 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 100 parts by weight of a cationic resin (one company, UX-101), 100 parts by weight of a cationic resin (No. Ichigo Pharmaceutical, Sharoll DC-902
P) 100 parts by weight, PVA (Kuraray, CM-318) 1
A coating solution consisting of 5 parts by weight and 1 part by weight of a polyamide resin (Sumitomo Chemical, Sumireze Resin 636) was prepared to prepare an aqueous solution having a solid content of 28.3%.

<Preparation of Coating Solution for Anion Layer> 100 parts by weight of light calcium carbonate (Shiraishi Kogyo, Shiraishihana PZ), esterified starch (Shikishima Starch, Mermaid MC3000) 4
Parts by weight, styrene-butadiene latex (Sumitomo Dow,
SN-307) 19.6 parts by weight, polyamide resin (Sumitomo Chemical, Sumireze Resin 636) 1 part by weight, sodium polycarboxylate (Sanyo Chemical, Carribbon L400) 1 part by weight, thickener (Hoechst Synthesis, Biscalex) VG-2)
A coating solution consisting of 1.5 parts by weight was prepared, and the solid content was 48.0.
% Aqueous solution was made.

First, the cationic layer coating solution was weighed at 127.9 g.
/ M ² , Beck smoothness 8.1 seconds, density 0.722 g /
18 g / m ² (wet) on one side was applied to m ³ base paper and dried to prepare a coated paper.

Further, a coating solution for the anion layer was applied to the coated paper using a Meyer bar on one side such that the coating solution was laminated on the cation layer.
g / m ² (wet) was applied and dried to prepare a multi-layer coated paper.

[0074]

[Comparative Example 1] 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Ropaek HP-91), esterified starch (Shikishima starch, Mermaid MC)
3000) 5.3 parts by weight, styrene-butadiene latex (Sumitomo Dow, SN-307) 19.4 parts by weight, polyamide resin (Sumitomo Chemical, Sumireze resin 636) 1
A coating solution consisting of 1 part by weight of sodium polycarboxylate (Sanyo Kasei Co., Ltd., Cariblon L400) and 10 parts by weight of a 20% solution of caustic soda was prepared to prepare an aqueous solution having a solid content of 38.1%.

The coating solution was weighed to 127.9 g / m.^Two, Beck
Smoothness 8.1 seconds, density 0.722 g / m^Three Piece of base paper
Surface 18g / m^Two(Wet) coated with Meyer bar and dried
Then, a coated paper was created.

[0076]

Comparative Example 2 <Preparation of Coating Solution for Cationic Layer> 100 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of cationic resin (one company, UX-101), cationic resin (Bayer, Rebogen FWN) 5 parts by weight, PVA (Kuraray, CM-318) 15 parts by weight, polyamide resin (Sumitomo Chemical, Sumireze Resin 636)
A coating solution consisting of 1 part by weight was prepared to prepare an aqueous solution having a solid content of 28.3%.

<Preparation of Coating Solution for Anion Layer> 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Rope Lake HP-91), esterified starch (Shikishima) Starch, Mermaid MC3000) 5.3 parts by weight,
Styrene-butadiene latex (Sumitomo Dow, SN-3
07) 19.4 parts by weight of a polyamide resin (Sumitomo Chemical,
A coating solution comprising 1 part by weight of Sumireze resin 636), 1 part by weight of sodium polycarboxylate (Sanyo Kasei, Carribbon L400) and 10 parts by weight of a 20% solution of caustic soda was prepared.
A 26.7% solids aqueous solution was made.

First, the cationic layer coating solution was weighed at 127.9 g.
/ M^Two , Beck smoothness 8.1 seconds, density 0.722 g /
m^Three18g / m on one side of base paper^Two(Wet) coating dry
Then, a coated paper was created.

Further, an anion layer coating solution was applied to the coated paper
Using a yaber, one side 15
g / m^Two (Wet) coated and dried, multi-layer coated paper
It was created.

[0080]

Comparative Example 3 80 parts by weight of light calcium carbonate (Okutama Kogyo, Tamapearl TP-121), 20 parts by weight of plastic pigment (Rohm & Haas, Rope Lake HP-91), esterified starch (Shikishima Starch, Mermaid MC)
3000) 5.3 parts by weight, styrene-butadiene latex (Sumitomo Dow, SN-307) 19.4 parts by weight, polyamide resin (Sumitomo Chemical, Sumireze resin 636) 1
A coating liquid consisting of 1 part by weight of sodium polycarboxylate (Sanyo Kasei Co., Ltd., Cariblon L400) and 10 parts by weight of a 20% sodium hydroxide solution was prepared to prepare an aqueous solution having a solid content of 49.1%.

The coating solution was coated on a base paper having a basis weight of 127.9 g / m ² , a Beck smoothness of 8.1 seconds, and a density of 0.722 g / m ³ at 20 g / m ² (wet) on one side, followed by drying. Made paper.

Further, one side of 20 g / m ² (wet) was coated and dried with a Meyer bar so that the same coating liquid was laminated on the coated paper to prepare a coated paper having a multilayer structure.

A quality test was performed on the coated papers obtained in Examples and Comparative Examples. Table 1 shows the results obtained for the streak pattern and printability.

[0084]

[Table 1]

[0085]

[Table 2]

The printability was evaluated by solid printing using an RI tester of Meisho Seisakusho, the surface tension and the contact angle were measured using WET-6000 manufactured by Resca, and the streak pattern was visually evaluated.

[0087]

As described above, the coated paper of the present invention has an uneven streak pattern, and no corners are formed in the concave portions, so that the coated paper is rich in ink receptivity and excellent in feel.

Therefore, according to the present invention, it has become possible to provide a pattern-coated paper having excellent printability and excellent quality.

[Brief description of drawings]

FIG. 1 is an explanatory view of a case where a base paper is directly coated.

FIG. 2 is an explanatory diagram of a case where an anionic coating liquid is applied to a coated paper coated with an anionic coating liquid.

FIG. 3 is an explanatory diagram of a case where an anionic coating liquid is applied to coated paper coated with a cationic coating liquid.

[Explanation of symbols] 1 base material 2 anionic coating liquid 3 corner portion 4 non-coating portion 5 flattening portion 6 cationic coating liquid

Claims (3)

[Claims] Claims: 1. A base material is coated with a cationic coating solution as a lower layer, and dried at 100 to 130 ° C for 1 to 5 seconds.
An anionic coating liquid having a wet tension of 0 to 16 dyne / cm is applied thereon by a gravure coater or a Meyer bar coater, and rapidly gelled at the boundary between the upper and lower coating layers, so that the coating surface has irregularities. A method for producing a coating material, characterized in that a streak pattern is developed. 2. The method according to claim 1, wherein the base material is paper or plastic. 3. The method according to claim 1, wherein the cationic coating liquid contains a cationic polymer and / or a cationic additive, and the anionic coating liquid contains an anionic polymer and / or an anionic additive. Item 3. The method according to Item 1 or 2.