JP3508307B2 - Manufacturing method of cast coated paper - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing cast coated paper, and more particularly to cast coated paper capable of highly efficiently producing cast coated paper having excellent white paper gloss on the surface of cast coated paper and printability. The present invention relates to a paper manufacturing method.

[0002]

2. Description of the Related Art As a method for producing strong glossy paper for printing called cast coated paper, a cast coating solution containing pigments and adhesives as main components is applied to a base paper, and then the coated layer is made wet. In the meantime, press contact with the surface of the heating drum that has been mirror-finished,
Wet cast method of drying and gloss finish, re-wet cast method of drying the wet coating layer once, then wet plasticizing with re-wetting liquid and finishing by pressing against heating drum surface, and wet on base paper A gelling casting method is generally known in which a coating layer in a state is put into a gel state and brought into pressure contact with a surface of a heating drum to give a gloss finish. All of these cast finishing methods are common in that the surface of the coating layer in the wet plastic state is pressed against the surface of the heating drum, dried, released from the surface of the heating drum, and the mirror surface is copied.

The cast coated paper thus obtained has a high white paper gloss and a high degree of surface smoothness as compared with general coated paper such as art paper or coated paper which is supercalendered, By obtaining excellent printing effect,
It is exclusively used for high-grade printed matter or high-grade paper containers.

However, according to the method for producing cast coated paper, since the coated layer is dried by contacting the surface of the heating drum, all the moisture in the coated layer or the moisture of the rewetting liquid is transferred from the coated layer to the paper. It will pass through the layer, pass through to the back surface, and evaporate and dry. Therefore, in the production of cast coated paper, it is the current situation that it is forced to operate at an extremely low speed as compared with general art paper or coated paper that is dried from both sides. Therefore, in the production of cast coated paper, it is an important subject to obtain a high quality paper surface, increase the operating speed, and improve the productivity.

As described above, in the production of cast coated paper, an attempt to improve the productivity has an influence on the quality, and there are many contradictory factors between the productivity and the quality.
There are various difficulties in improving both at the same time, and the fact is that they are forced to operate at low speeds. To date, many attempts have been proposed to improve the quality of cast coated paper. For example, various reports have been made regarding changes in pigments and adhesives, changes in the ratio of adhesives and pigments, and the like. 1
As one example, there has been proposed a method for improving productivity by using heavy calcium carbonate, light calcium carbonate or the like in combination with kaolin or alone, but this method causes a problem such as decrease in printing gloss. is there.

In view of the recent solutions, one approach is to propose improvements based on the latex composition and the type of adhesive. For example, JP-A-57-11769
No. 4 is a cast coated paper using a copolymer latex obtained by containing an acrylonitrile monomer as an adhesive, and JP-A No. 60-139762 discloses an aliphatic conjugated diene and an ethylenically unsaturated monomer. 95% of body insoluble in toluene
Cast coated papers using the above copolymer latex have been proposed. All of these methods improve the white paper gloss compared to the conventional methods, but cause a decrease in printing workability due to a decrease in ink setting properties and ink drying properties, or release properties from the cast drum surface. However, there is a problem such as a decrease in productivity.

Further, as a new adhesive, Japanese Patent Laid-Open No.
No. 88072 proposes a cast coated paper using an acrylic monomer copolymer aqueous urethane resin and a styrene-butadiene copolymer latex, and although this method also provides excellent white paper gloss, it has an ink setting property. Also, there is a decrease in productivity such as a decrease in ink drying property and a decrease in mold releasability from the surface of the cast drum.

Further, JP-A-4-146294 proposes a combination of a plastic pigment and a copolymer latex which defines a minimum film-forming temperature.
Certainly, although this method also improves the glossiness of the white paper, there is a decrease in the ink setting property and the ink drying property, and there remains a problem in the printing workability. As described above, when it is attempted to improve the glossiness of white paper on cast coated paper, the ink setting property and the ink drying property decrease, and further the productivity decreases. In addition, when a pigment such as calcium carbonate having good air permeability is blended to improve productivity, there is a problem such as decrease in printing gloss. In any case, a sufficient solution to satisfy productivity and quality at the same time. The reality is that no solution has been found.

[0009]

From the actual situation as described above,
The present invention relates to a method for producing a cast coated paper, and particularly to a method for producing a cast coated paper capable of producing a highly efficient cast coated paper having excellent whiteness and whiteness on the surface of the cast coated paper. Is.

[0010]

SUMMARY OF THE INVENTION The present invention comprises:
Cast coating in which a coating composition for casting comprising an adhesive and a pigment as a main component is coated to form a coating layer, and the coating layer is pressed while being in contact with a heated mirror drum while the coating layer is in a wet state. In the method for producing paper, a hollow plastic pigment having a porosity of 45% or more is used in the coating composition for casting, and the compounding amount thereof is 2 to 20 with respect to 100 parts by weight of the pigment other than the hollow plastic pigment. A method for producing cast coated paper, characterized in that it is contained in an amount of 1 part by weight.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In order to improve the quality of cast coated paper, the present inventors have made extensive studies on a coating layer for casting. As a result, by using a hollow plastic pigment as the pigment used for the cast coating layer, there is no improvement in white paper gloss, improvement in printability such as ink setting property and ink drying property, and further deterioration in cast operability. Then, they have found that they can be produced efficiently, and have completed the present invention.

Here, the hollow plastic pigment, which is a feature of the present invention, is a hollow spherical body having a shell formed of an organic synthetic pigment, the hollow portion of which is filled with water, and the internal water when dried. Is evaporated and replaced with air to become hollow. Examples of hollow plastic pigment materials include olefin aromatic monomers such as styrene, α-methylstyrene, chlorostyrene, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, ( Mono-olefin monomers such as (meth) butyl acrylate and (meth) acrylonitrile,
Aliphatic conjugated diolefin monomers such as butadiene, isoprene and 2-chlorobutadiene, olefin unsaturated hydroxy monomers such as hydroxypropyl acrylate and hydroxypropyl methacrylate, acrylamide, methacrylamide, N-methoxymethylacrylamide, N- Examples are olefinically unsaturated amide monomers such as methoxymethylmethacrylamide. In addition, another monomer copolymerizable with these is used if necessary.

Since the hollow plastic pigment in the cast coating layer has a low specific gravity as compared with other pigments such as kaolin and calcium carbonate, the number of particles per the same weight is large and the high voids of the hollow plastic pigment itself. A bulky cast coating layer is formed in combination with the coating rate. As a result, many pores (micropores) are present in the entire cast coating layer, resulting in improved breathability and improved printability (ink workability) such as ink drying and cast operability. It is estimated that At this time, when the hollow plastic pigment having a porosity of 45% or more, preferably 52% or more of the spherical body (volume) is used, the desired effect of the present invention can be obtained. By the way, if the porosity is less than 45%, the desired effect of improving the air permeability and the ink drying property of the present invention cannot be obtained, resulting in a decrease in printing workability and a decrease in casting operation speed. The upper limit of the porosity is not particularly limited, the larger the better, the better, but it is estimated to be about 80% in practice. If it is more than that, the wall film forming the hollow is likely to be broken upon receiving a mechanical shear, and the desired effect may not be obtained.

The content of the hollow plastic pigment in the cast coating layer is 2 to 20 parts by weight based on 100 parts by weight of the pigment other than the hollow plastic pigment.
It is preferably adjusted in the range of 5 to 15 parts by weight. When the amount is less than 2 parts by weight, it is difficult to obtain the desired effects of the present invention, and the printing workability such as ink setting property and ink drying property and the cast operability cannot be sufficiently obtained. On the other hand, if it exceeds 20 parts by weight, the ratio of the hollow plastic pigment occupying in the cast coating layer becomes too large, so that the film formation on the surface of the cast coating layer is hindered and a cast coating layer surface having high gloss is obtained. It will be difficult.

The hollow plastic pigment used in the present invention preferably has a glass transition temperature of 80 ° C. or higher and a particle diameter of 0.4 to 1.1 μm. Incidentally, when the glass transition temperature is lower than 80 ° C., a film is easily formed when the coating composition for casting containing the hollow plastic pigment is pressed against a heating mirror surface drum and dried. As a result, it is difficult to obtain the desired effect of improving the air permeability and the ink drying property of the present invention, and there is a concern that the printing workability and the casting operation speed may decrease. On the other hand, if the particle size is less than 0.4 μm, it is difficult to obtain the air permeability and ink drying property desired by the present invention, while if it exceeds 1.1 μm, there is a concern that the gloss of the surface of the cast coating layer may decrease.

As the pigment used in the coating layer for casting, in addition to the above-mentioned specific hollow plastic pigment, for example, kaolin, calcium hydroxide, satin white, barium sulfate, heavy calcium carbonate, light calcium carbonate, talc, One or more pigments conventionally used in the field of producing cast coated paper, such as plastic pigments, calcined clay, and titanium dioxide, are appropriately used.

Further, as the adhesive constituting the coating layer for casting, proteins such as casein and soybean protein,
Conjugated diene polymer latex such as styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer, acrylic polymer latex such as polymer or copolymer of acrylic acid ester and methacrylic acid ester, ethylene-vinyl acetate copolymer Vinyl-based polymer latex such as polymer, or these various polymers or copolymers with functional group-containing monomer such as carboxy group, functional group-modified alkali-soluble or alkali-insoluble polymer latex, Synthetic resin adhesives such as polyvinyl alcohol, olefin-maleic anhydride resin and melamine resin, starches such as positive starch, oxidized starch and esterified starch,
Conventionally known adhesives known for general coated papers, such as cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, are used alone or in combination. The amount of the adhesive used is adjusted in the range of 5 to 50% by weight, generally 10 to 35% by weight, based on the total solid content, based on the solid content.

Further, for the purpose of improving the water resistance and blocking resistance of the coating composition, diglycerol polyglycidyl ether, glycerol polyglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, and adipic acid diglycidyl ester. Such as polyfunctional epoxy compounds, zirconium ammonium carbonate, zirconium compounds such as zirconium acetate, urea-formaldehyde type, melamine-formaldehyde type, polyamide urea-formaldehyde type, glyoxal, water-soluble polyamine type resin and water-soluble polyamide type resin Various water-proofing agents and printability-improving agents can be appropriately added, and the addition ratio of these is used in the range of 0.01 to 10 parts by weight with respect to 100 parts by weight of the pigment.

Further, a release agent is optionally added to the coating composition for casting in order to improve the releasability of the cast coating layer from the heated mirror surface drum. Examples of the release agent in that case include fatty acids such as stearic acid, oleic acid and palmitic acid, and calcium and zinc thereof,
Salts such as sodium and ammonium, amides such as stearic acid amide, ethylenebisstearic acid amide and methylenebisstearic acid amide, hydrocarbons such as microcrystalline wax, paraffin wax and polyethylene emulsion, higher grades such as cetyl alcohol and stearyl alcohol Alcohol, oils and fats such as funnel oil and lecithin, various surfactants such as fluorine-containing surfactants,
Examples thereof include fluoropolymers such as tetrafluoroethylene polymers and ethylene-tetrafluoroethylene polymers, polyethylene waxes having a melting point of 70 ° C. or higher, polyethylene emulsions, polypropylene emulsions, and the like. These release agents are based on 100 parts by weight of the pigment. It is added in the range of 0.01 to 10 parts by weight, more preferably 0.1 to 5 parts by weight.

Further, sodium chloride, ammonium chloride, zinc chloride, magnesium chloride, sodium sulfate, potassium sulfate, ammonium sulfate, zinc sulfate, magnesium sulfate, ferrous sulfate, sodium nitrate, ammonium nitrate, monobasic sodium phosphate, ammonium phosphate, phosphoric acid Calcium, sodium polyphosphate, sodium hexametaphosphate, sodium formate, ammonium formate, sodium acetate, potassium acetate, sodium monochloroacetate, sodium malonate, sodium tartrate, potassium tartrate, sodium citrate, potassium citrate, sodium lactate, sodium gluconate , Sodium adipate, sodium dioctyl sulfosuccinate, methylamine, diethanolamine, diethylenetriamine, diisopropylamine, etc. Ammonium salts and metal salts of acids and organic acids, and can be added directly or in the form of a chelate or complex amines such as glossing aid.

Further, various auxiliaries such as a dispersant, an antifoaming agent, a colorant, a fluorescent dye, an antistatic agent and an antiseptic agent which are used in the production of general coated paper and cast coated paper are appropriately added. It

A coating composition for casting (hereinafter, simply referred to as a paint) composed of the above-mentioned materials is generally prepared so that the solid component concentration is about 40 to 65% by weight, and the weight of the rice is about 35 to 35%.
It is cast on a base paper of about 400 g / m ² and various supports such as a porous film so that the dry weight is about 1 to 40 g / m ² , more preferably about 5 to ²⁰ g / m ^2. It

As the coating device in this case, various known coating devices such as a blade coater, an air knife coater, a roll coater, a brush coater, a chanplex coater, a bar coater and a gravure coater are appropriately used. Is cast-finished by any of the wet casting method, the rewetting casting method, and the gelling casting method.

The base paper for cast coated paper is not particularly limited, and acidic paper or neutral paper generally used in the field of cast coated paper is applied. If necessary, a general pigment coating composition may be pre-coated on one side or both sides of the base paper in advance. In this case, the coating amount is preferably about 5 to 30 g / m ^{2 on a} dry basis per one side. Further, if necessary, this pre-coated paper may be subjected to smoothing treatment such as super calendering, brushing, and cast finishing in advance.

[0025]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto. Parts and% in the examples are parts by weight and% by weight, respectively, unless otherwise specified. The details of the hollow plastic pigments used in the examples are summarized in Table 1.

Example 1 As a coating material for casting, 80 parts of kaolin (trade name: Ultra White-90 / manufactured by EC), 20 parts of light calcium carbonate (trade name: PX / manufactured by Shiraishi Industry Co., Ltd.), dissolved in ammonia 10 parts of 15% casein solution (solid content),
Styrene-butadiene copolymer latex (hereinafter SBR
20 parts (solid content), and 55% porosity hollow plastic pigment A (trade name: MH-5055 /
10 parts of a particle size of 0.50 μm, glass transition temperature 105 ° C., manufactured by Nippon Zeon Co., Ltd. was added to prepare a coating composition for casting having a concentration of 54%, which was cast-finished by a wet casting method.

That is, 70 parts of kaolin (trade name: Ultra White-90 / manufactured by EC) and light calcium carbonate (trade name: TP-123CS / manufactured by Okutama Industry Co., Ltd.) in advance 3
An undercoat paint consisting of 0 part, SBR 15 parts and oxidation modified starch 4 parts was dried with a blade coater to a dry weight of 15 g / m ^2.
The above-prepared coating material for casting is coated on a base paper for casting of 145 g / m ^{2 having} a weight of 12 g / m ² by a roll coater so that the dry weight is 12 g / m ^2. Immediately thereafter, this paper was pressed against a cast drum (surface temperature: 80 ° C.) with a press roll, dried and then peeled from the cast drum to obtain a cast coated paper. The quality and operability of the obtained cast coated paper are shown in Table 1.

Example 2 In the preparation of the coating material of Example 1, instead of the hollow plastic pigment A, a hollow plastic pigment B having a porosity of 51% (trade name: HP-91 / Rohm & Haas Company,
A cast coated paper was obtained in the same manner as in Example 1 except that the particle diameter was 1.0 μm and the glass transition temperature was 95 ° C.). The quality and operability of the obtained cast coated paper are shown in Table 1.

Example 3 A cast coated paper was obtained in the same manner as in Example 1 except that in the preparation of the coating material of Example 1, the addition amount of hollow plastic pigment A was changed from 10 parts to 20 parts. The quality and operability of the obtained cast coated paper are shown in Table 1.

Example 4 A cast coated paper was obtained in the same manner as in Example 1 except that in the preparation of the coating material of Example 1, the addition amount of hollow plastic pigment A was changed from 10 parts to 3 parts. The quality and operability of the obtained cast coated paper are shown in Table 1.

Comparative Example 1 In the preparation of the coating material of Example 1, instead of the hollow plastic pigment A, a hollow plastic pigment C having a porosity of 33.2% (trade name: OP-62 / Rohm & Haas, particle size 0. A cast coated paper was obtained in the same manner as in Example 1 except that 45 μm and a glass transition temperature of 105 ° C.) were used. The quality and operability of the obtained cast coated paper are shown in Table 1.

Comparative Example 2 A cast coated paper was obtained in the same manner as in Example 1 except that the hollow plastic pigment A was not added in the preparation of the coating material of Example 1. The quality and operability of the obtained cast coated paper are shown in Table 1.

Comparative Example 3 A cast coated paper was obtained in the same manner as in Example 1 except that the amount of hollow plastic pigment A added was changed from 10 parts to 30 parts in the preparation of the coating material of Example 1. The quality and operability of the obtained cast coated paper are shown in Table 1.

Example 5 80 parts of kaolin (trade name: Ultra White-90 / manufactured by EC), 20 parts of light calcium carbonate (brand name: Brilliant S-15 / manufactured by Shiraishi Industry Co., Ltd.), and 0 sodium polyacrylate 0.5 part was dispersed in water using a Choles disperser to prepare a pigment slurry having a solid content concentration of 65%.

0.5 parts of tributyl phosphate as an antifoaming agent, 1.0 part of calcium stearate as a release agent, 6 parts of a 15% aqueous casein solution (solid content) dissolved with ammonia as an adhesive and SBR were added to this slurry.
Twenty-three parts (solid content) was added, and further 10 parts of hollow plastic pigment A was added to prepare a coating material for casting having a solid content concentration of 45%, and cast finishing by a rewet casting method was performed.

[0036] That is, coated with an air knife coater so that the dry weight cast coating material prepared by the cast for base paper Beitsubo 135 g / m ² is 22 g / m ^2, and dried with an air floating dryer . Next, the coated paper is passed through a press nip formed by a press roll and a cast drum, and the rewetting liquid (sodium hexametaphosphate) (0.5% concentration) supplied from a nozzle is used to coat the surface of the coated layer. After re-wetting
Press pressure 200k on a cast drum with a surface temperature of 105 ℃
After being pressed and dried at g / cm, it was peeled from the cast drum by a take-off roll to obtain a cast coated paper. The quality and operability of the obtained cast coated paper are shown in Table 2.

Example 6 A cast coated paper was obtained in the same manner as in Example 5 except that hollow plastic pigment B was used instead of hollow plastic pigment A in the preparation of the coating material of Example 5. Table 2 shows the quality and operability of the obtained cast coated paper.
It was shown to.

Example 7 A cast coated paper was obtained in the same manner as in Example 5 except that the amount of the hollow plastic pigment A added was changed from 10 parts to 20 parts in the preparation of the coating material of Example 5. The quality and operability of the obtained cast coated paper are shown in Table 2.

Example 8 A cast coated paper was obtained in the same manner as in Example 5 except that in the preparation of the coating material of Example 5, the addition amount of hollow plastic pigment A was changed from 10 parts to 3 parts. The quality and operability of the obtained cast coated paper are shown in Table 2.

Comparative Example 4 A cast coated paper was obtained in the same manner as in Example 5 except that hollow plastic pigment C was used instead of hollow plastic pigment A in the preparation of the coating material of Example 5. Table 2 shows the quality and operability of the obtained cast coated paper.
It was shown to.

Comparative Example 5 A cast coated paper was obtained in the same manner as in Example 5 except that the hollow plastic pigment A was not added in the preparation of the coating material of Example 5. The quality and operability of the obtained cast coated paper are shown in Table 2.

Comparative Example 6 A cast coated paper was obtained in the same manner as in Example 5 except that the amount of the hollow plastic pigment A added was changed from 10 parts to 30 parts in the preparation of the coating material of Example 5. The quality and operability of the obtained cast coated paper are shown in Table 2.

Example 9 80 parts of kaolin, 20 parts of light calcium carbonate and 0.5 part of sodium polyacrylate were dispersed in water by means of Choles dispersion to prepare a pigment slurry having a solid content concentration of 65%. 0.5 parts of tributyl phosphate as an antifoaming agent and 1.0 part of calcium stearate as a releasing agent were added to this slurry.
Parts, 6 parts of 15% aqueous casein solution (solid content) dissolved with ammonia as an adhesive and 23 parts of SBR (solid content) were added, and a hollow plastic pigment A10 was added.
Parts to prepare a casting paint with a concentration of 50%,
Cast finish by gelling method was performed.

That is, the above coating material was coated on a cast base paper having a surface area of 135 g / m ² with a roll coater so that the dry weight was 22 g / m ^2, and then 0.5% calcium formate was applied.
The coating layer was gelled by contact with a coagulating liquid consisting of The coated paper was pressure-bonded to a cast drum having a surface temperature of 98 ° C. with a press roll at a press pressure of 100 kg / cm, dried and then peeled off from the cast drum with a take-off roll to obtain a cast coated paper. The quality and operability of the obtained cast coated paper are shown in Table 3.

Example 10 A cast coated paper was obtained in the same manner as in Example 9 except that hollow plastic pigment B was used instead of hollow plastic pigment A in the preparation of the coating material of Example 9. Table 3 shows the quality and operability of the obtained cast coated paper.
It was shown to.

Example 11 A cast coated paper was obtained in the same manner as in Example 9 except that in the preparation of the coating material of Example 9, the amount of hollow plastic pigment A added was changed from 10 parts to 20 parts. The quality and operability of the obtained cast coated paper are shown in Table 3.

Example 12 A cast coated paper was obtained in the same manner as in Example 9 except that the amount of the hollow plastic pigment A added was changed from 3 parts to 10 parts in the preparation of the coating material of Example 9. The quality and operability of the obtained cast coated paper are shown in Table 3.

Comparative Example 7 A cast coated paper was obtained in the same manner as in Example 9 except that hollow plastic pigment C was used instead of hollow plastic pigment A in the preparation of the coating material of Example 9. Table 3 shows the quality and operability of the obtained cast coated paper.
It was shown to.

Comparative Example 8 A cast coated paper was obtained in the same manner as in Example 9 except that the hollow plastic pigment A was not added in the preparation of the coating material of Example 9. The quality and operability of the obtained cast coated paper are shown in Table 3.

Comparative Example 9 A cast coated paper was obtained in the same manner as in Example 9 except that in the preparation of the coating material of Example 9, the amount of hollow plastic pigment A added was changed to 30 parts. The quality and operability of the obtained cast coated paper are shown in Table 3.

The thus obtained cast coated paper was evaluated for white paper gloss, ink drying property, and maximum operable speed by the following methods, and the obtained results are shown in Tables 1 to 3.

[Glossiness of White Paper] It was measured according to JIS P8142.

[Ink Dryability] Using an RI printing tester (manufactured by Akira Seisakusho), 0.7 ml of a sheet offset ink (TRANS-G (Indigo) manufactured by Dainippon Ink and Chemicals) was used for printing. Two minutes after the printing and five minutes after the printing, a high-quality paper was superposed on the printing surface, and the ink density transferred to the high-quality paper was visually evaluated. ⊚: Ink hardly transferred after 2 minutes. Good: Ink hardly transferred after 5 minutes. Δ: The ink is transferred even after 5 minutes, which is half the density immediately after printing. X: The ink is transferred even after 5 minutes, which is almost the same as the density immediately after printing.

[Operability] When the cast coated paper is produced by the above method, the cast coated paper does not stick to the cast drum, drum picks or drum blisters do not occur, and stable production is possible. Indicates speed (unit:
m / min).

[0055]

[Table 1]

[0056]

[Table 2]

[0057]

[Table 3]

[0058]

As is clear from the results of Tables 1 to 3,
The cast coated paper obtained in the present invention had excellent white paper gloss and printability, excellent workability, and could be produced with high efficiency.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-1-111090 (JP, A) JP-A-6-93596 (JP, A) JP-A-3-90692 (JP, A) JP-A-5- 170831 (JP, A) JP-A-6-280194 (JP, A) JP-A-62-156387 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D21H 11/00-27 / 42

Claims (2)

(57) [Claims] 1. A coating layer is formed by coating a coating composition for casting comprising an adhesive and a pigment as main components on a support, and the coating layer is heated while the coating layer is in a wet state. In a method for producing a cast coated paper for finishing by pressing against a mirror surface drum, a hollow plastic pigment having a porosity of 45% or more is used in the cast coating composition, and the compounding amount of the hollow plastic pigment is other than that of the hollow plastic pigment. A method for producing cast coated paper, characterized in that the pigment is contained in an amount of 2 to 20 parts by weight based on 100 parts by weight. 2. The method for producing cast coated paper according to claim 1, wherein the particle diameter of the hollow plastic pigment is 0.4 to 1.1 μm.