JP5757763B2 - Method for producing cast coated paper and pressure-sensitive adhesive sheet using the same - Google Patents

Description

  The present invention relates to cast coated paper, a method for producing the same, and an adhesive sheet using the same. In particular, the present invention relates to a cast coated paper suitable for adhesive label applications and a method for producing the same.

  High gloss coated paper called cast coated paper is coated with a water-based paint mainly composed of pigment and adhesive on the surface of the base paper to provide a cast coating layer and heat the wet cast coating layer. It is manufactured by press-contacting to a metal mirror-finished surface (drum) and drying.

  In general, there are three methods for producing cast coated paper. (1) Wet cast method (direct method) in which a wet coated layer is directly pressed against a heated mirror-finished surface to give a gloss finish. ), (2) Gelled cast method (coagulation method) in which a wet coating layer is brought into a gel (solidified) state and then pressed against a heated mirror-finished surface (coagulation method), (3) wet coating A rewetting cast method (rewetting method) is known in which a layer is once dried and then plasticized by rewetting and pressed against a heated mirror-finished surface.

  Each of these cast coated paper manufacturing methods is a coating having a high glossiness such as a mirror surface by pressing and drying the heated mirror surface while the cast coating layer is in a wet or plastic state. Common in obtaining layers. The cast coated paper having such a high glossiness is used for publishing, commercial printing, adhesive label paper, packaging and packaging.

  As described above, the cast coated paper has a high glossiness of the coated surface, and thus may be used for labeling. In particular, an adhesive layer may be provided on the surface opposite to the cast coating surface and used as an adhesive sheet.

  However, when an adhesive sheet is produced using cast coated paper as a base material, there is a technical problem that the adhesive strength of the adhesive is reduced after a long period of time, and in particular, neutral paper is used as the base paper for cast coated paper. When used, the tendency for the adhesive strength to decrease was remarkable.

  In view of such a situation, an object of the present invention is to develop a technique for suppressing a decrease in the adhesive strength of an adhesive sheet when an adhesive is provided on the surface opposite to the cast surface of cast coated paper.

  As a result of intensive studies on the above problems, the present inventors applied an adhesive strength reduction inhibitor selected from a surface sizing agent and a water-resistant agent to the surface opposite to the cast coated surface of the cast coated paper. As a result, it was found that when the pressure-sensitive adhesive sheet was formed, a decrease in adhesive strength could be suppressed, and the present invention was completed.

Although not limited thereto, the present invention includes the following inventions.
(1) A method for producing cast coated paper, wherein a coating liquid containing a pigment and an adhesive is applied to one side of a base paper, and a wet coating layer is pressed against the mirror surface of the cast drum and dried. Applying the adhesive strength reduction inhibitor selected from a surface sizing agent and a water-resistant agent to the opposite surface of the cast coating surface.
(2) The method according to (1), wherein the adhesive strength reduction inhibitor is applied while the coating layer is pressed against the mirror surface of the cast drum and dried.
(3) The method according to (1) or (2), wherein the coating amount of the adhesive strength reduction inhibitor is 0.1 to 2.0 g / m ² .
(4) The method according to any one of (1) to (3), wherein the base paper is a neutral base paper.
(5) Cast coated paper produced by any one of the methods (1) to (4).
(6) A method for producing cast coated paper by any one of the methods (1) to (4), and applying an adhesive layer to the surface of the cast coated paper coated with the adhesive strength reduction inhibitor. The manufacturing method of an adhesive sheet.
(7) The adhesive sheet manufactured by the method of (6).

  According to this invention, even if it is a case where it is a pressure sensitive adhesive sheet, the cast coated paper which can suppress the fall of the adhesive force of a pressure sensitive adhesive sheet can be obtained.

The present invention relates to a cast coated paper obtained by coating a coating liquid containing a pigment and an adhesive on one side of a base paper, and pressing and drying a wet coating layer on the mirror surface of a cast drum. This is a method of applying an adhesive strength reduction inhibitor selected from a surface sizing agent and a water-resistant agent to the opposite surface of the cast coating surface.

  In the present invention, by applying an adhesive strength reduction inhibitor selected from a surface sizing agent and a water-resistant agent to the opposite surface of the cast coating surface, the reason why the adhesive strength is suppressed when the adhesive sheet is obtained The details are not clear, and the present invention is not limited to the following assumptions, but by applying the adhesive strength reduction inhibitor between the cast coated paper and the adhesive layer, the base material of the adhesive sheet As a result of the interaction between the cast coated paper and the pressure-sensitive adhesive being suppressed, it is presumed that the decrease in the adhesive strength is suppressed. When the inventor manufactures an adhesive sheet using a cast coated paper as a base material, the adhesive strength is lower when the cast coated paper as a base material is neutral paper than when it is acidic paper. It has been found that the tendency is large, and it is considered that components in the paper such as a sulfuric acid band used for the production of acidic paper are involved in the decrease in adhesive strength, but the details are not clear.

  In the present invention, the surface sizing agent is a sizing agent that is used after being applied (externally added) to the paper surface, and is not limited to this, but is a styrene / maleic acid sizing agent, styrene / acrylic. Copolymer sizing agent, styrene acrylic emulsion sizing agent, acrylic copolymer sizing agent, acrylic emulsion sizing agent, olefin maleic acid resin sizing agent, urethane sizing agent, AKD / ASA sizing agent, petroleum resin sizing agent Specific examples include sizing agents and rosin ester sizing agents. The ionicity of the sizing agent may be any of cationic, anionic and nonionic.

  The waterproofing agent used in the present invention is a chemical usually used for imparting water resistance necessary for printing or use, and specifically, formaldehyde, glyoxal, dialdehyde starch, modified polyamide resin, Examples include modified amine resins, urea / formaldehyde resins, melamine / formaldehyde resins, polyamide urea formaldehyde resins, ketone resins, polyamide epichlorohydrin resins, glycerol polyglycidyl ether resins, ammonium zirconium carbonate, zinc sulfate, borax, and satin white. Can do.

In the present invention, a surface sizing agent and / or a water resistance-imparting agent is applied to the opposite surface of the cast coating surface as an adhesive strength reduction inhibitor of the pressure-sensitive adhesive sheet, but the coating amount is not particularly limited. However, from the viewpoint of adhesive strength, the coating amount is preferably 0.1 g / m ² or more, more preferably 0.3 g / m ² or more, and further preferably 0.5 g / m ² or more. preferable. From the viewpoint of adhesive strength, the coating amount is preferably 3.0 g / m ² or less, more preferably 2.5 g / m ² or less, and further preferably 2.0 g / m ² or less. preferable.

  In this invention, the application | coating system at the time of apply | coating an adhesive force fall inhibitor to the opposite surface of a cast coating surface is not specifically limited, It can be based on a well-known coating method. Specific coating methods include a blade transfer method, a rod method, an air knife method, a film transfer method such as a gate roll method, a curtain method, a spray method, a size press method, and a roll method.

  In the present invention, the application timing of the adhesive strength reduction inhibitor is not particularly limited, but while the cast coating layer is applied and pressed onto the mirror drum (cast drum) and dried, or pressed against the mirror drum. It is preferable to carry out at a stage after drying. In addition, it is not necessary to provide a separate drying device while applying pressure-sensitive adhesive lowering agent to the mirror drum (cast drum) while being pressed and dried. Is advantageous.

  In the present invention, when the above-described adhesive strength reduction inhibitor is applied, it may be applied as a solution in an appropriate solvent such as water. When the adhesive strength reduction inhibitor is a liquid, it is applied without dilution. May be. Since it is easy to adjust the viscosity of the coating solution and it is easy to add additional chemicals, in the present invention, it is possible to apply using a coating solution containing an adhesive strength-reducing inhibitor. preferable.

Adhesive Sheet The cast coated paper for an adhesive sheet of the present invention is used as an adhesive (adhesive) sheet by applying an adhesive to the surface opposite to the surface provided with the cast coating layer. There is no limitation in particular in the adhesive used in this invention, A well-known adhesive can be used. Examples of pressure-sensitive adhesives used include polyamide-based pressure-sensitive adhesives, polyimide-based pressure-sensitive adhesives, α-olefin-based pressure-sensitive adhesives, polyester-based pressure-sensitive adhesives, epoxy resin-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, and cyano. Reaction curable resin adhesives such as acrylate adhesives, acrylic adhesives, vinyl acetate adhesives, solvent adhesives such as rubber adhesives, ethylene-vinyl acetate copolymer emulsion adhesives, acrylic emulsions A water-based pressure-sensitive adhesive such as a water-based pressure-sensitive adhesive can be preferably exemplified. Moreover, the method to provide an adhesive layer to the cast coated paper for adhesive sheets of this invention is not specifically limited, It can be based on a well-known method.

  In one embodiment, the present invention is a method for producing a pressure-sensitive adhesive sheet, further comprising applying a pressure-sensitive adhesive layer to the cast coated paper produced as described above. From another viewpoint, the present invention is a pressure-sensitive adhesive sheet having a cast coating layer, a base paper layer, an adhesive strength reduction inhibitor layer, and a pressure-sensitive adhesive layer in this order.

Cast coating method In the present invention, the cast coating method is not particularly limited, and the cast coating layer is formed by any of the wet casting method (direct method), the gelled casting method (solidification method), and the rewet casting method (rewetting method). It may be provided. In general, compared with the direct method, the coagulation method and the rewet method are preferable because the temperature of the mirror drum can be increased and the operation can be performed at high speed.

  In general, the cast coating liquid contains a pigment and an adhesive, but as the pigment used in the cast coated paper of the present invention, light calcium carbonate, heavy calcium carbonate, kaolin, clay, delaminated clay, talc, One or more of general pigments for coated paper, such as aluminum hydroxide, titanium oxide, barium sulfate, zinc oxide, silica, satin white, and plastic pigment, can be used as appropriate. From the viewpoint of blank paper texture and blank paper gloss, it is preferable to use 30 parts by weight or more of calcium carbonate or kaolin with respect to 100 parts by weight of the pigment.

  The adhesive used for the cast coating layer includes starch, modified starch, casein, soybean protein, protein and other natural adhesives, styrene-butadiene copolymer latex, acrylic emulsion latex, butadiene-acrylonitrile copolymer latex. In addition, one or more of various natural and synthetic adhesives generally used in aqueous coating compositions such as synthetic adhesives such as polyvinyl alcohol can be used in appropriate combination. The amount of the adhesive used is preferably 5 to 50 parts by weight and more preferably 10 to 30 parts by weight with respect to 100 parts by weight of the pigment.

In the cast coating layer, various auxiliary agents such as a dispersant, a water-proofing agent, a preservative, a surfactant, a dye, an antifoaming agent, and a flow modifier are appropriately blended in addition to the pigment and the adhesive as necessary. You can also.
In the present invention, the cast coated paper can be produced by a general method. In order to obtain the cast coated paper of the present invention, a direct method, a coagulation method, a rewetting method, or the like can be used. From the viewpoint of blank paper feeling and blank paper glossiness, the coagulation method is preferably used. Moreover, when manufacturing cast coated paper by the rewetting method or the coagulation method, a rewetting liquid and a coagulation liquid are used, respectively. The rewetting liquid is not particularly limited, and contains, for example, about 0.01 to 3% by weight of a release agent such as polyethylene emulsion, fatty acid soap, calcium stearate, microcrystalline wax, surfactant, and funnel oil. Usual rewetting liquids such as aqueous solutions and emulsions are used. Further, phosphates such as alkali and sodium hexametaphosphate, urea, organic acids and the like can be used in combination in order to promote plasticization of the dry coating layer. Furthermore, various adjuvants, such as an antifoaming agent, a water-resistant agent, a preservative, and a printability improver, which are blended in a normal coating paper-needed coating composition can be used as appropriate. For the coagulating liquid, salts such as formic acid, boric acid, itaconic acid, malic acid, acrylic acid (calcium salt, ammonium salt, sodium salt, magnesium salt, etc.) are used. In addition, various releasing agents, surfactants, dye fixing agents and water-proofing agents can be used in combination as appropriate.

In the present invention, in order to apply the cast coating solution on the base paper, the above-described cast coating solution is applied by an appropriate coating apparatus such as an air knife coater, a blade coater, a brush coater, a roll coater, or a size press. for coating onto the base paper, but the coating weight is preferably 1 to 40 g / ^{m 2} as solids per side of the base paper, more preferably 10 to 30 g / ^{m 2,} more preferably 10 to 25 g / ^{m 2.}

  After the cast coating layer is applied to the base paper, the wet cast coating layer is pressed against a heated cast drum, which is a mirror drum, and dried to obtain a cast coated paper. In the present invention, the cast drum and other conditions can be appropriately determined.

  In the present invention, the base paper of the cast coated paper is not particularly limited, and acid paper or neutral paper generally used in the cast coated paper field can be suitably used. As described above, when the neutral paper is used as the base paper, the adhesive sheet tends to have low adhesiveness. However, according to the present invention, the adhesive deterioration can be effectively suppressed, so the neutral paper is used as the base paper. The effect of the present invention can be enjoyed more greatly, which is preferable. In the present invention, neutral paper refers to paper having a paper surface pH defined by JIS P 8133 of 6.0 to 9.0.

  The raw material used for the base paper of the cast coated paper of the present invention is not particularly limited, and known pulp raw materials, fillers, and papermaking chemicals can be used. Examples of the pulp raw material include chemical pulps such as unbleached softwood pulp (NUKP), unbleached hardwood pulp (LUKP), bleached softwood pulp (NBKP), and bleached hardwood pulp (LBKP); stone grand pulp (SGP), pressurized Stone Grand Pulp (PGW), Refiner Grand Pulp (RGP), Chemi Grand Pulp (CGP), Thermo Grand Pulp (TGP), Grand Pulp (GP), Thermo Mechanical Pulp (TMP), Chemi Thermo Mechanical Pulp (CTMP), Refiner Mechanical pulp such as mechanical pulp (RMP) can be used. It is also possible to use waste paper pulp made of waste paper, for example, disaggregation / deinking waste paper pulp, disaggregation / deinking / bleached waste paper pulp, etc. produced from magazine waste paper, flyer waste paper, office waste paper, etc. . In the present invention, one or more of these can be appropriately selected and used.

  Usually, raw material pulp is mixed to prepare a papermaking raw material (stock slurry). For the raw material pulp, for example, an internally added sizing agent, a paper strength enhancer, a paper thickness improver, a yield improver, etc. Various additives blended in the normal papermaking process can be internally added by appropriately adjusting the type and blending amount.

  Further, the paper machine for making the base paper is not particularly limited, and for example, various systems such as a long net system, a twin wire system, a gap former system, a round net system, and a Yankee system can be appropriately used.

The basis weight of the base paper is, 40~220g / ^{m 2} about the can be suitably used, more preferably about 50~180g / ^{m 2,} about 60~130g / ^{m 2} is more preferred as the pressure-sensitive adhesive sheet applications. In addition, before providing a cast coating layer on one side or both sides of the base paper, a clear coating solution such as starch or a pigment coating solution may be preliminarily applied in advance.

  The cast coated paper of the present invention is particularly suitable as a cast coated paper for pressure-sensitive adhesive sheets because when the adhesive is provided on the surface opposite to the cast coated surface, the decrease in adhesive force is effectively suppressed. is there.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples of the present invention. However, the present invention is not limited to the following examples. In the present specification, unless otherwise specified, parts and% are based on weight, and numerical ranges are described as including the end points. Parts by weight and% by weight are indicated.

<Experiment 1: Adhesive sheet using acrylic emulsion adhesive>
Production of cast coated paper [Example 1]
70 parts of primary kaolin, 30 parts of columnar calcium carbonate and 0.2 part of sodium polyacrylate dispersing agent were added and dispersed in water using a cowless disperser to prepare a pigment slurry having a solid content concentration of 60%. In this pigment slurry, 0.2 part of tributyl phosphate as an antifoaming agent, 6 parts of a casein aqueous solution (solid content concentration 18%) dissolved using ammonia as an adhesive, and a styrene / butadiene based copolymer having a butadiene content of 55% 21 parts of polymer latex is added, 2 parts of calcium stearate and 0.6 part of nonionic emulsifier are blended as a release agent, and finally water and ammonia are added to form a cast coating solution having a solid content of 48% and a pH of 10.0. Was prepared.

  Also, as a coagulation liquid, 40% zinc oxide and 41% formic acid are blended with 100% calcium formate per absolute dryness, and 0.3 part of wax emulsion and 0.2 part of nonionic emulsifier are added as a release agent. In particular, a coagulation liquid mainly composed of calcium formate having a solid concentration of 15% was prepared.

Further, stearic acid (carbon number: 17) was applied to the mirror drum and buffed.
Using the coating solution prepared by the above method, dry coating is applied to one side of a neutral base paper with a basis weight of 110 g / m ² (mixed with hardwood bleached kraft pulp alone, containing 5% calcium carbonate as a filler). The coating solution was applied with a roll coater so that the work amount was 21 g / m ^2, and then contacted with the coagulating solution to solidify the coating layer. Next, it is pressed against a press roll with a diameter of 750 mm and a mirror drum (cast drum) with a surface temperature of 105 ° C. and a diameter of 3000 mm at a press pressure of 130 kg / cm, while the coating layer is being dried. A surface sizing agent (styrene-based polymer: SS2710, manufactured by Seiko PMC) was roll-coated on the surface so that the dry coating amount was 0.7 g / m ² and dried, and then peeled off from the cast drum with a take-off roll and adhered. A cast coated paper for sheet was produced.

[Example 2]
In Example 1, a cast coating for an adhesive sheet was used in the same manner as in Example 1 except that a water-resistant agent (modified polyamide resin: Sumire's Resin SPI-106N, manufactured by Sumitomo Chemical Co., Ltd.) was used on the opposite side of the cast coating surface. Manufactured paper was produced.

[Example 3]
In Example 1, except that the water-resistant agent (modified amine resin: Sumire's resin SPI-102A, manufactured by Sumitomo Chemical Co., Ltd.) was applied to the opposite surface of the cast coating surface so that the dry coating amount was 0.9 g / m ^2. In the same manner as in Example 1, a cast coated paper for an adhesive sheet was produced.

[Comparative Example 1]
In Example 1, cast coated paper for pressure-sensitive adhesive sheets was produced in the same manner as in Example 1 except that the chemical solution was not applied to the surface opposite to the cast coated surface.

[Comparative Example 2]
In Example 1, except that a paper strength enhancer (amphoteric acrylic resin: Polystron 678, manufactured by Arakawa Chemical Industry Co., Ltd.) was used on the opposite side of the cast coated surface, cast coating for an adhesive sheet was performed in the same manner as in Example 1. Paper was manufactured.

[Comparative Example 3]
In Example 1, the same procedure as in Example 1 was performed except that a paper strength enhancer (polyvinyl alcohol: PVA217, manufactured by Kuraray Co., Ltd.) was applied to the opposite surface of the cast coating surface so that the dry coating amount was 0.9 g / m ^2. A cast coated paper for an adhesive sheet was produced.

Production of pressure-sensitive adhesive sheet The above-mentioned cast coated paper for pressure-sensitive adhesive sheets was conditioned for 24 hours in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH. Thereafter, an acrylic emulsion pressure-sensitive adhesive layer was provided on the cast coated paper to produce a pressure-sensitive adhesive sheet. Specifically, an acrylic emulsion strong pressure-sensitive adhesive (BPW5175, manufactured by Toyo Ink Manufacturing Co., Ltd.) is provided on release paper (SP-8K, manufactured by Lintec) so that the coating amount after drying is 16 g / m ² . Furthermore, using the double-sided tape obtained by pasting another release paper (SP-8LK, manufactured by Lintec) on the adhesive side, peel off the release paper on one side of the double-sided tape, and cast the adhesive side of the double-sided tape. A pressure-sensitive adhesive sheet was produced by pasting on the back side of the paper cast surface.

Adhesive Evaluation Based on the measurement method of normal adhesive strength of JIS-Z-0237, the adhesive strength after adjusting under the following two conditions was measured (unit: N / 25 mm). That is, after conditioning the pressure-sensitive adhesive sheet for 24 hours in an atmosphere at a temperature of 23 ° C. and a humidity of 50% RH (condition 1), or after conditioning the humidity for 3 days in an atmosphere of a temperature of 60 ° C. and a humidity of 95% RH After further conditioning for 24 hours in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH (condition 2), the other release paper of the adhesive sheet is peeled off, and the adhesive surface is attached to a stainless steel plate (SUS360) or a polyethylene plate, respectively. I attached. Next, immediately after the pasting, after the pasting, the adhesive strength was measured after conditioning for 24 hours in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH, and the adhesive strengths of Condition 1 and Condition 2 were compared.

  Table 1 shows the results. The cast coated paper for pressure-sensitive adhesive sheets of Examples 1 to 3 has a good adhesive force when used as a base material of a pressure-sensitive adhesive sheet using an emulsion-based strong pressure-sensitive adhesive. In comparison, the difference between the adhesive strength in Condition 1 and the adhesive strength in Condition 2 is small, and it can be said that the decrease in adhesive strength could be suppressed. In particular, when the cast coated paper of the present invention was used, it was possible to greatly suppress a decrease in adhesiveness when left under high temperature and high humidity conditions.

<Experiment 2: Adhesive sheet using acrylic solvent-based adhesive>
Production of cast coated paper [Example 4]
In Example 1, after cast coating, a surface sizing agent (anionic styrenic resin: Polymeron 1308-20, manufactured by Arakawa Chemical Industry Co., Ltd.) was used in a blade type so that the dry coating amount was 0.9 g / m ² . Using a lab coating machine, the coated surface for the pressure-sensitive adhesive sheet was produced by coating and drying on the opposite side of the cast coated surface.

[Example 5]
In Example 4, the surface sizing agent (styrene resin: Polymaron NI, manufactured by Arakawa Chemical Industries, Ltd.) was applied to the surface opposite to the cast coating surface, except that the dry coating amount was 0.7 g / m ^2. In the same manner as in No. 4, a cast coated paper for an adhesive sheet was obtained.

[Comparative Example 4]
In Example 4, a cast coated paper for an adhesive sheet was obtained in the same manner as in Example 4 except that the chemical solution was not applied to the surface opposite to the cast coated surface.

[Comparative Example 5]
In Example 4, a paper strength enhancer (amphoteric acrylic resin: Polystron 678, manufactured by Arakawa Chemical Industries, Ltd.) was applied to the surface opposite to the cast coating surface except that the dry coating amount was 0.7 g / m ^2. In the same manner as in Example 4, a cast coated paper for an adhesive sheet was obtained.

[Comparative Example 6]
In Example 4, a wet paper strength enhancer (cationic epoxy resin aqueous solution: Arafix 251S, manufactured by Arakawa Chemical Industry Co., Ltd.) is applied to the opposite surface of the cast coating surface so that the dry coating amount is 1.0 g / m ^2. Except that, a cast coated paper for an adhesive sheet was obtained in the same manner as in Example 4.

Production of pressure-sensitive adhesive sheet The above-mentioned cast coated paper for pressure-sensitive adhesive sheets was conditioned for 24 hours in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH. Then, the acrylic solvent-type adhesive layer was provided in the said cast coated paper, and the adhesive sheet was manufactured. Specifically, an acrylic solvent-based strong pressure-sensitive adhesive (PA-T1, manufactured by Lintec) is provided on release paper (SP-8K, manufactured by Lintec) so that the coating amount after drying is 20 g / m ² . Furthermore, using the double-sided tape obtained by pasting another release paper (SP-8LK, manufactured by Lintec) on the adhesive side, peel off the release paper on one side of the double-sided tape, and cast the adhesive side of the double-sided tape. A pressure-sensitive adhesive sheet was produced by pasting on the back side of the paper cast surface.

The adhesive strength of the adhesive sheet was measured in the same manner as in the adhesive evaluation experiment 1, and the adhesive strengths of Condition 1 and Condition 2 were compared.

  Table 2 shows the results. The cast coated paper for pressure-sensitive adhesive sheets of Examples 4 and 5 has a good adhesive force when used as a base material of a pressure-sensitive adhesive sheet using an acrylic solvent-based strong pressure-sensitive adhesive. In comparison, the difference between the adhesive strength in Condition 1 and the adhesive strength in Condition 2 is small, and it can be said that the decrease in adhesive strength could be suppressed. In particular, when the cast coated paper of the present invention was used, it was possible to greatly suppress a decrease in adhesiveness when left under high temperature and high humidity conditions as compared with the comparative example.

Claims (6)

A method for producing cast coated paper for an adhesive sheet,
A coating solution containing pigment and adhesive is applied to one side of the base paper, and the wet coating layer is pressed against the mirror surface of the cast drum and dried, and the coating layer is pressed against the mirror surface of the cast drum and dried. while is, seen including applying the adhesive force reduction inhibitor selected from surface sizing agent and water-resisting agent to the opposite surface of the cast coated surface,
Surface sizing agent is styrene / maleic acid sizing agent, styrene / acrylic copolymer sizing agent, styrene acrylic emulsion sizing agent, acrylic copolymer sizing agent, acrylic emulsion sizing agent, olefin maleic acid resin sizing agent Selected from urethane sizing agent, AKD / ASA sizing agent, petroleum resin sizing agent or rosin ester sizing agent,
Water-proofing agents are formaldehyde, glyoxal, dialdehyde starch, modified polyamide resin, modified amine resin, urea / formaldehyde resin, melamine / formaldehyde resin, polyamide urea formaldehyde resin, ketone resin, polyamide epichlorohydrin resin, glycerol polyglycidyl ether resin, Process as described above, selected from ammonium zirconium carbonate, zinc sulfate or borax . The method of Claim 1 that the application quantity of an adhesive force fall inhibitor is 0.1-2.0 g / m < ² >.   The method according to claim 1 or 2, wherein the base paper is a neutral base paper.   The cast coated paper for adhesive sheets manufactured by the method in any one of Claims 1-3.   An adhesive comprising: producing cast coated paper for an adhesive sheet by the method according to any one of claims 1 to 3; and applying an adhesive layer to the surface of the cast coated paper coated with an adhesive strength reduction inhibitor. Sheet manufacturing method.   The adhesive sheet manufactured by the method of Claim 5.