WO2005068718A1 - 紙塗工液及びそれを用いた塗工紙 - Google Patents
紙塗工液及びそれを用いた塗工紙 Download PDFInfo
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- WO2005068718A1 WO2005068718A1 PCT/JP2005/000710 JP2005000710W WO2005068718A1 WO 2005068718 A1 WO2005068718 A1 WO 2005068718A1 JP 2005000710 W JP2005000710 W JP 2005000710W WO 2005068718 A1 WO2005068718 A1 WO 2005068718A1
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- coating liquid
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
Definitions
- the present invention relates to a paper coating liquid and a coated paper using the same, and more particularly, to a paper coating liquid capable of high-speed coating with improved water retention and fluidity, and the same.
- the present invention relates to a coated paper coated with a paper coating liquid and having good surface characteristics.
- printing paper is provided with a coating layer formed by applying a predetermined paper coating liquid on its surface in order to improve smoothness, glossiness, and printability.
- This paper coating liquid is usually prepared as a slurry in which a white pigment such as clay and heavy calcium carbonate and a binder such as latex and starch are dispersed in water, and used after diluting the slurry to an appropriate concentration. It is something that can be done.
- This paper coating liquid is supplied from a regulating tank to a coating machine (coater), and then continuously applied on the surface of a paper base material running at high speed. Excess is removed by a coating head such as a blade. Therefore, since a thin film-like coating liquid layer is formed on the paper substrate, the coating layer having a desired film thickness is formed on the surface of the paper substrate by drying. Coated paper can be obtained.
- the excess of the paper coating liquid removed from the paper base is generally returned to the adjustment tank, mixed with a new paper coating liquid, and reused.
- the paper coating liquid is required to have sufficient water retention. If the water retention is insufficient, the water in the coating liquid will readily penetrate and migrate into the paper substrate, and the layer composed of the thin film coating liquid formed on the paper substrate In contact with paper substrate In some cases, an increase in the concentration may be caused, and there is a problem that the coated paper obtained has a defect in quality or a problem in operation.
- a water retention agent a paper coating composition using an acrylamide-based copolymer that is a water-soluble polymer (for example, see Patent Documents 11 to 13), a water retention agent composed of a sulfonidro aromatic polymer And a paper coating composition using the same (see, for example, Patent Document 4), a paper coating solution using a water-soluble Aone-Dani modified polyvinyl alcohol (see, for example, Patent Document 5), and the like.
- a paper coating liquids using a carboxylic acid-based copolymer as a water retention agent for example, see Patent Documents 6 to 8).
- the water retention agents used in paper coating liquids and the like disclosed in the above-mentioned patent documents exerted a force that could not be said to have sufficient effects of improving water retention.
- the amount of these water retention agents is increased to improve water retention, the viscosity of the paper coating liquid (especially at high shear rates) may become too high to make coating difficult. is there. That is, fluidity must be sacrificed to some extent in order to ensure sufficient water retention of the paper coating liquid, while water retention tends to be insufficient to improve fluidity. Therefore, it was extremely difficult to achieve these characteristics at the same time.
- Patent Document 1 JP-A-53-74117
- Patent Document 2 JP-A-5-222696
- Patent Document 3 JP-A-8-170298
- Patent document 4 JP-A-2-289196
- Patent Document 5 JP-A-3-124899
- Patent Document 6 JP-A-2-53996
- Patent Document 7 JP-A-9-268496
- Patent Document 8 JP-A-2002-13096
- the present invention has been made in view of such problems of the related art, and an object of the present invention is to improve fluidity despite improved water retention and increased viscosity.
- An object of the present invention is to provide an improved paper coating solution capable of high-speed coating and a coated paper coated with the paper coating solution and having good surface properties.
- the present inventors have conducted intensive studies to develop a paper coating solution having excellent water retention and fluidity and capable of high-speed coating. It has been found that these objects can be achieved by including the agent in the paper coating solution, and the present invention has been completed.
- a paper coating liquid containing at least a pigment, a binder, and a fluidity modifier, wherein the fluidity modifier comprises the following components (a) and (b): And a paper coating liquid containing two or more components selected from the group consisting of the following components (c) and (always including the component (a) or the component (b)): You.
- Component (b) a copolymer comprising the structural unit A, the structural unit B, and a structural unit represented by the following general formula (1) (structural unit C)
- R 1 is a hydrogen atom, a methyl group or a carboxyl group
- R 2 is a linear or branched alkylene group having 14 to 14 carbon atoms
- R 3 is a hydrogen atom or a carbon atom group.
- R 4 is a hydrogen atom or a carboxyl group
- Y is a carboyl group or a divalent hydrocarbon group
- M is 0 or 1
- n is an integer of 10-100 ( ⁇ and R 2 may be the same or different from each other)
- the fluidity modifier is a two-stage It is preferred to be obtained by polymerization.
- the fluidity modifier contains both the component (a) and the component (b).
- a coated paper obtained by coating at least one surface of a paper base material with any one of the above-described paper coating liquids.
- the paper coating liquid of the present invention is excellent in both water retention and fluidity, and has the effect of being capable of high-speed coating. Further, the coated paper of the present invention has an effect of having good surface characteristics.
- FIG. 1 is a graph plotting creep compliance (X 10 ′′ 3 Pa _1 ) against time (s) for the paper coating solutions of Examples 1 and 2 and Comparative Examples 14 to 14.
- FIG. 2 is a graph plotting creep compliance (X 10 ′′ 3 Pa _1 ) against time (s) for the paper coating liquid of Comparative Example 2.
- FIG. 3 is a graph plotting creep compliance (X 10 ′′ 3 Pa _1 ) against time (s) for the paper coating solutions of Example 4 and Comparative Examples 5 and 6.
- the paper coating liquid of the present invention is a paper coating liquid containing at least a pigment, a binder, and a fluidity modifier, and the fluidity modifier has a predetermined component (a) component and component (b) component. And (c) two or more components selected from the group consisting of the following components (however, the component (a) or the component (b) is necessarily included).
- the component (a) is a neutral component of an acrylic acid unit and a methacrylic acid unit, and at least one type of a structural unit selected from the group consisting of an acrylic acid ester unit and a methacrylic acid ester unit.
- the structural unit B which is one of the structural units constituting the copolymer is, for example, a structural unit derived from a compound (monomer) represented by the following general formula (2).
- R 5 and R 6 are a hydrogen atom or a methyl group, and R 7 is an alkyl group or a cycloalkyl group.
- examples of the alkyl group represented by R 7 include a methyl group, an ethyl group, a propyl group, a butyl group, an octyl group, a 2-ethylhexyl group, a dodecyl group, Examples thereof include a xadecyl group and an octadecyl group.
- examples of the cycloalkyl group include a cyclopentyl group and a cyclohexyl group.
- Examples of the monomer represented by the general formula (2) include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, Examples include cyclohexyl acrylate, dodecyl acrylate, hexadecyl acrylate, octadecyl acrylate, and the corresponding methacrylate.
- the component (b) refers to a copolymer comprising the structural unit A, the structural unit B, and the structural unit (structural unit C) represented by the general formula (1).
- the group represented by is a hydrogen atom, a methyl group or a carboxyl group.
- the group represented by R 2 is a linear or branched alkylene group having 14 to 14 carbon atoms, and examples thereof include an ethylene group, a propylene group, a trimethylene group, and a butylene group. Of these, an ethylene group is more preferred, with an ethylene group and a propylene group being preferred.
- the hydrocarbon group represented by R 3 may be any of aliphatic, alicyclic and aromatic hydrocarbon groups having 1 to 30 carbon atoms, for example, Examples thereof include a chain or branched alkyl group, cycloalkyl group, and phenyl group. Further specific examples of the alkyl group include an octyl group, a 2-ethylhexyl group, a dodecyl group, and a hexadexyl group. Examples thereof include a sil group and an octadecyl group.
- the preferred carbon number of R 3 is in the range of 8-18.
- n is an integer of 10 to 100, and is a value represented as an average number. Note that n is preferably an integer of 20-50.
- the component (c) refers to a thickener and Z or a water retention agent conventionally used for imparting water retention and thickening to a paper coating solution, and the components (a) and (b) ) Means those excluding components. Specifically, carboxymethylcellulose (CMC), sodium alginate, casein, or the like can be suitably used as the component having such characteristics (component (c)).
- the fluidity modifier used in the paper coating liquid of the present invention comprises two or more components selected from the group consisting of component (a), component (b), and component (c). It comprises.
- component (a), component (b), and component (c) comprises.
- the term “comprising two or more components” as used in the present specification means that two or more components are included over different types of components, as well as the components, and that the same type of component is included. It also means that two or more components (copolymers) are included in the above. That is, for example, in the present specification, the component (a) contains two or more copolymers (a, a, a%) Having different substitution groups and different molecular weights.
- component (b) may contain two or more copolymers (b, b, b,...) Having different substituents, molecular weights, etc.
- the flow modifier always contains the component (a) or the component (b), and contains only the component (c) without including the V and deviation components. ! / ,.
- component (a), component (b) and component (c) by selecting two or more components having different characteristics from component (a), component (b) and component (c), the same properties as those of the conventional fluidity modifier can be obtained. Even when the amount is less than or equal to the used amount, the physical properties required for the paper coating liquid such as water retention and fluidity can be improved to obtain desired physical properties. Further, the surface properties of paper obtained by using the paper coating liquid of the present invention having such characteristics can also be improved.
- component (a) which has characteristics when paper coating liquid is mainly made to have fluidity and component (b) which has characteristics when paper coating liquid is mainly made to have water retention are included. It is preferable to use a fluidity modifier.
- the content ratio (mass ratio) of the structural unit A and the structural unit B constituting the component (a) contained in the fluidity modifier used in the paper coating liquid of the present invention is 5:95. — 70:30 is preferred 20: 80— 60:40 is even more preferred! If the content ratio of the structural unit A is less than this! / ⁇ , the water retention effect of the paper coating liquid may be insufficient.If it is more than this, the viscosity of the B-type rises and the copolymer becomes This is because it may become unstable.
- the content ratio of the constituent unit C is preferably 0.1 to 50% by mass, and more preferably 110 to 30% by mass, based on the entire component (b). Is more preferable.
- the amount is less than 0.1% by mass, the viscosity of the paper coating liquid may not be sufficiently improved, and when the amount is more than 50% by mass, the viscosity of the paper coating liquid may be too high and the fluidity may be reduced. Power.
- the weight average molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC) method is in the range of 100,000-10,000,000 for component (a). It is preferable that the component (b) is in the range of 10,000 to 1,000,000. If the molecular weight is lower than this, the water retention of the paper-coated paper may not be sufficiently maintained. If the molecular weight is higher than this, the viscosity of the paper coating liquid becomes too high to handle it. This is because it may be.
- the mass average molecular weight is in the range of 1,000,000 to 4,000,000 for component (a), and (b) Ingredients are more preferably in the range of 100,000 to 1,000,000.
- the addition ratio (mass ratio) of the component (a) to the component (b) is
- Component (a): Component (b) is preferably 1: 9-9: 1, more preferably 3: 7-7: 3.
- the addition ratio (mass ratio) of the component (a) and the component (b) is within this range, the balance between the water retention and the viscosity of the paper coating liquid can be more suitably maintained.
- the method for producing the copolymer of the component (a) is not particularly limited, and the copolymer can be easily produced by employing a known method. Further, the copolymer of the component (b) can be easily produced by a method commonly used in the production of ordinary acrylic copolymers.
- the copolymer of the component (b) is, for example, at least one selected from neutral acids of acrylic acid and methacrylic acid. By copolymerizing a monomer represented by the general formula (1) with at least one monomer selected from among acrylic acid esters and methacrylic acid esters. Can be manufactured.
- At least one monomer selected from acrylic acid and methacrylic acid and at least one monomer selected from acrylic acid esters and methacrylic acid esters are represented by the following general formula (3) It can also be produced by copolymerizing at least one monomer represented by the following formula and introducing a group represented by the following general formula (4).
- R 1 is a hydrogen atom, a methyl group or a carboxyl group
- R 2 is a linear or branched alkylene group having 114 carbon atoms
- R 4 is a hydrogen atom or a carboxyl group.
- R 3 is a hydrogen atom or a hydrocarbon group having 130 carbon atoms
- R 8 is a hydrogen atom or a methyl group
- m is 0 or 1
- Any method such as solution polymerization, emulsion polymerization, solid-phase polymerization, etc. is not particularly limited as to the method of monomer polymerization. Can be used.
- the polymerization initiator may be a water-soluble azo compound or peroxide, for example, 2,2-azobis (2-amidinopropane) dihydrochloride, hydrogen peroxide, a water-soluble inorganic peroxide, or a water-soluble inorganic peroxide.
- a combination of an aqueous reducing agent with a water-soluble inorganic peroxide or an organic peroxide is used.
- the water-soluble inorganic peroxides include potassium persulfate and ammonium persulfate.
- water-soluble reducing agent examples include reducing agents used as ordinary water-soluble radical redox polymerization catalyst components, for example, ethylenediaminetetraacetic acid or its sodium or potassium salt, or iron, copper, and copper salts.
- Complex with heavy metals such as rom, sulfinic acid or its sodium or potassium salt, L-ascorbic acid or its sodium, potassium or calcium salt, ferrous pyrophosphate, ferrous sulfate, sulfuric acid Examples include ferrous ammonium, sodium sulfate, sodium acid sulfite, sodium formaldehyde sulfoxylate, reducing sugars and the like.
- water-soluble organic peroxides examples include tamene hydroperoxide, p-cymene hydroperoxide, tert-butylisopropylbenzene hydroperoxide, diisopropylbenzene hydroperoxide, and p-menthane.
- Hydroperoxides such as hydroperoxide, decalin hydroxyoxide, tert-aminohydroperoxide, tert-butyl hydroperoxide, isopropylhydroperoxide and the like can be mentioned.
- an emulsifier is used in the emulsion polymerization.
- an a-on surfactant or a combination thereof with a no-on surfactant is usually used.
- Known surfactants commonly used in emulsion polymerization such as alkylbenzene sulfonates, alkyl sulfonates, alkyl sulfates, fatty acid metal salts, polyoxyalkyl ether sulfates, are known as the aionic surfactants. Examples thereof include polyoxyethylene alkyl phenyl ether sulfate and succinic acid dialkyl sulfonate.
- non-ionic surfactant examples include polyoxyethylene alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene alkyl ether glycerin borane.
- Substituted compounds, sorbitan fatty acid esters, glycerin fatty acid esters, pentaerythritol fatty acid esters and the like can be mentioned.
- a chain transfer agent may be used per 100 parts by mass of the monomer component in order to reduce the molecular weight.
- the chain transfer agent is not particularly limited. Examples thereof include carbon tetrachloride, halogen-substituted alkanes such as bromoform and bromotrichloroethane, n -dodecylmercaptan, tert-dodecylmercaptan, octylmercaptan, tetradecylmercaptan, and hexane.
- Alkyl mercaptans such as decyl mercaptan, Tioglyco Thioesters such as alkyl monothioglycolate such as butyl butylate, isootatyl thioglycolate and dodecyl thioglycolate; alcohols such as methanol, ethanol, and isopropanol; trimethylstyrene dimer, terpinol, terpinene, dipentene, etc. it can.
- a predetermined monomer is mixed at a predetermined ratio in an aqueous medium containing a polymerization initiator, an emulsifier, and, if necessary, a chain transfer agent.
- a temperature in the range of C an emulsion in which fine particles of the desired copolymer (component (a) and component (b)) are uniformly dispersed can be obtained.
- the monomer represented by the general formula (3) is used instead of the monomer represented by the general formula (1).
- a method of introducing a group represented by the general formula (4) after copolymerizing methyl-3-butenol to form a base copolymer and adopting a method of introducing a group represented by the general formula (4), A polyoxyalkylene compound represented by the general formula (5) or the following general formula (6), wherein the free terminal of the compound is blocked with a group capable of being substituted with a hydroxyl group, is reacted.
- R 3 is a hydrogen atom or a hydrocarbon group having 130 carbon atoms
- R 8 is a hydrogen atom or a methyl group
- m is 0 or 1
- n is an integer of 10-100.
- R 3 is a hydrogen atom or a hydrocarbon group having 130 carbon atoms
- R 8 is a hydrogen atom or a methyl group
- n is an integer of 10-100
- Examples of the polyoxyalkylene conjugate represented by the general formula (5) include polyoxyethylene monononanoate, polyoxyethylene monodecanoate, polyoxyethylene monododecanoate, and polyoxyethylene monododecanoate.
- Examples of the compound represented by the general formula (6) include, for example, polyoxyethylene nol ether, polyoxyethylene decyl ether, polyoxyethylene dodecyl ether, polyoxyethylene octadecyl ether, polyoxyethylene butylphenyl Ether, polyoxyethylene octyl phenyl ether, polyoxyethylene decyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyoxyethylene dodecyl phenyl ether and the like can be mentioned. These monomers may be used alone or in combination of two or more.
- the compound represented by the general formula (6) easily reacts with the side chain of the base copolymer, and can be reacted as a derivative, for example, a halide or an alkali salt.
- the reaction at this time can be carried out by a known method which is usually used for introducing a polyoxyalkylene chain into a compound.
- the paper coating liquid of the present invention is selected from the group consisting of component (a), component (b), and component (c) produced by the above-described production method with respect to a material containing a pigment, a binder, and the like. It can be prepared by adding a fluidity modifier containing two or more components and uniformly mixing or dissolving it.
- the method of adding the fluidity modifier includes (1) a method of separately adding two or more components (first addition method), 2) a method of adding a fluidity modifier obtained by mixing two or more components (second addition method), and (3) a fluidity modifier obtained by two-stage polymerization of two or more components. And a third addition method.
- the paper coating liquid of the present invention is obtained by adding one of the component (a) and the component (b) to a material containing a pigment, a binder, and the like, and then adding the other. That is, the first It is preferably prepared by employing an addition method. In particular, it is preferable that the component (b) and the component (a) are added in this order from the viewpoint that it is more excellent in water retention and fluidity and can be applied at high speed. .
- the added component is mixed with a pigment, a binder, etc. until the components are sufficiently blended in, and an appropriate time. Leave it alone and then add the other component.
- the leaving time may be appropriately set according to the type of pigment, binder, and the like to be used, the amount of the prepared paper coating liquid, and the like.
- the paper coating liquid of the present invention contains a fluidity modifier in advance by mixing two or more components selected from component (a), component (b) and component (c). Prepared and added to the fluidity modifier containing pigments, binders, etc., that is, by using the second addition method, it is also necessary to improve water retention and fluidity. It is preferable because it is excellent and can be coated at high speed.
- the paper coating liquid of the present invention is also preferably prepared by employing the third addition method. Specifically, one of the components (a), (b), and (c) is prepared by polymerizing a monomer constituting the component, and then the other component is prepared.
- the fluidity modifier prepared by performing stepwise polymerization while controlling the balance of the polymerization reaction system using a predetermined surfactant or the like using a predetermined surfactant, etc. Those prepared by adding to a binder or the like are preferred because they have excellent water retention and fluidity and can be coated at high speed.
- the paper coating liquid of the present invention essentially comprises pigments, binders, and flow modifiers as its basic components, but may contain various components such as other additives as necessary. May be contained. These components can be arbitrarily selected from components used in conventional paper coating solutions, and are not particularly limited. Examples of pigments include clay, calcium carbonate (including heavy calcium carbonate and light calcium carbonate), kaolin, talc, titanium oxide, silica, zinc oxide, aluminum hydroxide, clay, lake, synthetic plastic pigments, and the like. Is used. These may be used alone, or two or more of them may be used in combination, and it is preferable to mix them in a content of 40 to 70% by mass with respect to the total amount of the paper coating solution. .
- pigments include clay, calcium carbonate (including heavy calcium carbonate and light calcium carbonate), kaolin, talc, titanium oxide, silica, zinc oxide, aluminum hydroxide, clay, lake, synthetic plastic pigments, and the like. Is used. These may be used alone, or two or more of them may
- the binder can be arbitrarily selected from solutions of synthetic or natural polymer latex and the like used in conventional paper coating solutions, and is not particularly limited.
- high molecular compounds include styrene-butadiene copolymers, styrene-acryl copolymers, vinyl acetate-acrylic copolymers, ethylene vinyl acetate copolymers, and butadiene methyl methacrylate copolymers.
- the paper coating liquid of the present invention may be modified with additives such as a dispersant, an antifoaming agent, a water-proofing agent, and a coloring agent, if necessary, as long as the objects and effects of the present invention are not impaired.
- An agent can be appropriately contained.
- the dispersant include sodium polyacrylate, sodium hexametaphosphate, sodium pyrophosphate, and a sodium salt of a maleic acid-acrylate copolymer.
- the paper coating liquid of the present invention uses the specific fluidity modifier described above, and therefore has improved water retention and fluidity. This water retention can be evaluated based on the value of the dehydration amount (pressure dehydration amount) measured by the pressure dehydration method. Specifically, using a retention meter AA-GWR (manufactured by Kaltec's Kaltec Scientific), a paper coating solution of 10 ml, a pressure of 150 kPa, a pressurization time of 15 seconds, and a temperature of 20 ° C are used. The amount of dehydration of the paper coating solution (the amount of dehydration under pressure (gZm 2 )) on the filter paper was measured, and the smaller the measured value, the better the water retention.
- the improved and high-speed coatability of the surface of preferably tool coated paper properties that pressurized ⁇ water is 50GZm 2 or less, further preferably not more 40GZm 2 or less ,.
- the fluidity of the paper coating liquid under high shear (HS) conditions can be evaluated based on the measured value of HS viscosity.
- a high shear (HS) viscometer was used to measure the HS viscosity (mPa's) at 20 ° C at a rotation speed of 8800 rpm. It can be evaluated as having high fluidity.
- a coated paper for offset printing is preferably obtained in which the HS viscosity is preferably 40 mPa's or less.
- the HS viscosity force is preferably S30 mPa ⁇ s or less!
- the viscosity of the paper coating liquid can be evaluated based on the measured value of the B-type viscosity.
- the B-type viscosity (mPa ⁇ s) at 20 ° C was measured at a rotation speed of 60 rpm, and the measured value was large! / can do.
- the B-type viscosity (60 rpm) is preferably at least 100 mPa's. Further, when used for obtaining a coated paper for gravure printing with improved ink inking property, it is preferable that the B-type viscosity (60 rpm) is 2000 mPa's or more.
- the fluidity of the paper coating liquid can be evaluated based on the measured creep compliance.
- the creep compliance (Pa ⁇ ) was measured using a rheometer DAR-100 (manufactured by Rheologica Instrument (Rheological Instrument AB)) under the conditions described in detail in “Examples” below.
- the larger the measured value the higher the fluidity can be evaluated.However, if the fluidity is too high, the paper coating liquid will flow out, and a uniform coating amount will be required. Therefore, in the paper coating liquid of the present invention, the creep compliance is more preferably from 40 to 60 Pa 1, and even more preferably from 45 to 55 Pa _1 .
- the coated paper of the present invention is obtained by coating at least one surface of a paper substrate with the above-described paper coating liquid of the present invention. That is, the coated paper of the present invention has improved water retention and fluidity, and is obtained using a paper coating solution that can be coated at high speed, and therefore, defects such as streaks and scratches are unlikely to occur.
- Glut white paper Coated paper with good surface characteristics, excellent in various properties such as gloss, print gloss, dry and topical surface strength, blister resistance, smoothness, ink acceptability, and dot reproducibility.
- Examples of the paper base material constituting the coated paper of the present invention include high quality paper, medium quality paper, and paperboard.
- the coating of the paper coating liquid is a blade coater, a roll coater, An ordinary method using an air knife coater or the like is to apply a paper coating liquid on one or both sides of a paper base material in a thin film form, and then perform a drying treatment to form a coating layer having a predetermined solid content.
- the solid content adhesion quantity of coating layer to be formed is not particularly limited, but is preferably a 2- 30gZm 2.
- B-type viscosity The B-type viscosity (mPa ⁇ s) at 20 ° C was measured at 6 rpm and 60 rpm according to TAPPI standard T648 Su-72.
- HS Viscosity HS viscosity (mPa's) at 20 ° C. was measured at 8800 rpm using a high shear viscometer (manufactured by Nippon Seiki Co., Ltd.).
- 35 parts by mass of clay, 63 parts by mass of heavy calcium carbonate, 2 parts by mass of titanium oxide, 8.5 parts by mass of styrene-butadiene copolymer latex (as solid content), and a dispersant (manufactured by Somar, SDA-40K) ) 0.1 parts by mass (as solids) were mixed, and water was added so that the total solids concentration was 64.5% by mass to prepare a coating color for offset printing.
- a copolymer consisting of 39% by mass of methacrylic acid units, 41% by mass of ethyl acrylate units, and 20% by mass of methyl methacrylate units. 0.15 parts by mass of polymer (mass average molecular weight: 2,000,000) (as solid content) was added and mixed to prepare a paper coating solution.
- a paper coating liquid was prepared by adding and mixing 0.15 parts by mass (as a solid content) of CMC as a component (c) to the above-described offset printing coating color.
- a copolymer (mass average molecular weight: 2,000, 000) comprising 39% by mass of methacrylic acid units and 61% by mass of ethyl methacrylate units
- a paper coating liquid was prepared by adding and mixing 0.15 parts by mass (as solid content).
- the paper coating liquid of Examples 13 to 13 was prepared by adding the same mass part of the fluidity modifier to the coating color. Compared with the paper coating liquids of Comparative Examples 1, 3, and 4, it is clear that the paper coating liquid has good water retention and fluidity and can be coated at high speed. It should be noted that the paper coating liquid of Example 1 in which the components (b) and (a) are added in the order of the components (a) and (b) is used. It was found that the fluidity was slightly superior to the paper coating liquid of Example 2 in which the addition was made. However, the paper coating liquid of Example 2 is superior to the paper coating liquid of Example 1 when simplicity of handling and workability are considered.
- the paper coating liquid of Example 4 was prepared by adding the same mass part of the fluidity modifier to the coating color.
- the value of creep compliance was large, that is, the fluidity was excellent. It is clear that.
- the paper coating liquid of Example 4 was prepared by adding the same mass parts of the fluidity modifier to the coating color, Compared to the paper coating liquid of No. 6, the water retention and fluidity are better and it is clear that it is a paper coating liquid that can be coated at high speed.
- the paper coating liquid of the present invention is excellent in high-speed coating properties, productivity of coated paper can be improved. Further, the coated paper of the present invention has improved productivity and good surface properties.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800089781A CN1934317B (zh) | 2004-01-20 | 2005-01-20 | 纸涂布液及使用该纸涂布液的涂布纸 |
JP2005517129A JP4768443B2 (ja) | 2004-01-20 | 2005-01-20 | 紙塗工液及びそれを用いた塗工紙 |
KR1020067015997A KR101176340B1 (ko) | 2004-01-20 | 2006-08-08 | 종이코팅액 및 이것을 사용한 코팅지 |
Applications Claiming Priority (2)
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JP2004012147 | 2004-01-20 | ||
JP2004-012147 | 2004-01-20 |
Publications (1)
Publication Number | Publication Date |
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WO2005068718A1 true WO2005068718A1 (ja) | 2005-07-28 |
Family
ID=34792367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/000710 WO2005068718A1 (ja) | 2004-01-20 | 2005-01-20 | 紙塗工液及びそれを用いた塗工紙 |
Country Status (4)
Country | Link |
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JP (1) | JP4768443B2 (ja) |
KR (1) | KR101176340B1 (ja) |
CN (1) | CN1934317B (ja) |
WO (1) | WO2005068718A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009161365A (ja) * | 2007-12-28 | 2009-07-23 | National Institute Of Advanced Industrial & Technology | 無機物質粉末ペーストの製造方法、及び無機物質粉末ペースト |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8417352B2 (en) | 2004-10-19 | 2013-04-09 | Meagan Medical, Inc. | System and method for stimulating sensory nerves |
FR2925077A1 (fr) * | 2007-12-17 | 2009-06-19 | Coatex Soc Par Actions Simplif | Epaississant acrylique a chaine hydrophobe et ramifiee pour sauce de couchage papetiere a retention d'eau amelioree |
SE534561C2 (sv) * | 2009-04-03 | 2011-10-04 | Korsnaes Ab | Pigmentbestruken kartong för förpackningar, förpackning innefattande pigmentbestruken kartong, användning av sådan kartong, och ett förfarande i en process för tillverkning av kartong |
UA110221C2 (uk) * | 2010-09-28 | 2015-12-10 | Tetra Laval Holdings & Finance | Спосіб одержання пакувального матеріалу для упаковки, що стерилізується, пакувальний матеріал та упаковка |
JP6744672B1 (ja) * | 2019-05-20 | 2020-08-19 | 株式会社Tbm | 印刷用シート及び印刷用シートの製造方法 |
KR102648309B1 (ko) * | 2021-09-03 | 2024-03-19 | 김현수 | 포장용 종이 코팅용 조성물 및 이를 포함하는 코팅된 포장지 |
Citations (6)
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JPH08188987A (ja) * | 1994-12-30 | 1996-07-23 | Sannopuko Kk | 紙塗被塗料用保水剤 |
JPH10226988A (ja) * | 1996-12-09 | 1998-08-25 | Dai Ichi Kogyo Seiyaku Co Ltd | 紙塗被剤用保水剤 |
JPH11124791A (ja) * | 1997-10-17 | 1999-05-11 | Dai Ichi Kogyo Seiyaku Co Ltd | 紙塗被剤用保水剤 |
JPH11246798A (ja) * | 1998-03-04 | 1999-09-14 | Sannopuko Kk | 水系コーティング剤用保水剤 |
JPH11246800A (ja) * | 1998-03-04 | 1999-09-14 | Sannopuko Kk | 水系コーティング剤用改質剤 |
JP2000273794A (ja) * | 1999-03-24 | 2000-10-03 | Dai Ichi Kogyo Seiyaku Co Ltd | 紙塗被剤用保水剤 |
-
2005
- 2005-01-20 WO PCT/JP2005/000710 patent/WO2005068718A1/ja active Application Filing
- 2005-01-20 CN CN2005800089781A patent/CN1934317B/zh not_active Expired - Fee Related
- 2005-01-20 JP JP2005517129A patent/JP4768443B2/ja not_active Expired - Fee Related
-
2006
- 2006-08-08 KR KR1020067015997A patent/KR101176340B1/ko not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08188987A (ja) * | 1994-12-30 | 1996-07-23 | Sannopuko Kk | 紙塗被塗料用保水剤 |
JPH10226988A (ja) * | 1996-12-09 | 1998-08-25 | Dai Ichi Kogyo Seiyaku Co Ltd | 紙塗被剤用保水剤 |
JPH11124791A (ja) * | 1997-10-17 | 1999-05-11 | Dai Ichi Kogyo Seiyaku Co Ltd | 紙塗被剤用保水剤 |
JPH11246798A (ja) * | 1998-03-04 | 1999-09-14 | Sannopuko Kk | 水系コーティング剤用保水剤 |
JPH11246800A (ja) * | 1998-03-04 | 1999-09-14 | Sannopuko Kk | 水系コーティング剤用改質剤 |
JP2000273794A (ja) * | 1999-03-24 | 2000-10-03 | Dai Ichi Kogyo Seiyaku Co Ltd | 紙塗被剤用保水剤 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009161365A (ja) * | 2007-12-28 | 2009-07-23 | National Institute Of Advanced Industrial & Technology | 無機物質粉末ペーストの製造方法、及び無機物質粉末ペースト |
Also Published As
Publication number | Publication date |
---|---|
KR101176340B1 (ko) | 2012-08-22 |
CN1934317A (zh) | 2007-03-21 |
JPWO2005068718A1 (ja) | 2007-09-06 |
KR20070001127A (ko) | 2007-01-03 |
CN1934317B (zh) | 2011-06-08 |
JP4768443B2 (ja) | 2011-09-07 |
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