JP4865374B2 - Coated paper for printing and method for producing the same - Google Patents

Coated paper for printing and method for producing the same Download PDF

Info

Publication number
JP4865374B2
JP4865374B2 JP2006081753A JP2006081753A JP4865374B2 JP 4865374 B2 JP4865374 B2 JP 4865374B2 JP 2006081753 A JP2006081753 A JP 2006081753A JP 2006081753 A JP2006081753 A JP 2006081753A JP 4865374 B2 JP4865374 B2 JP 4865374B2
Authority
JP
Japan
Prior art keywords
paper
filler
printing
weight
inorganic filler
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2006081753A
Other languages
Japanese (ja)
Other versions
JP2007254922A (en
Inventor
克正 小野
誠幸 渡邊
明伸 茶谷
文就 野々村
Original Assignee
日本製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本製紙株式会社 filed Critical 日本製紙株式会社
Priority to JP2006081753A priority Critical patent/JP4865374B2/en
Publication of JP2007254922A publication Critical patent/JP2007254922A/en
Application granted granted Critical
Publication of JP4865374B2 publication Critical patent/JP4865374B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Description

  The present invention has a high ash yield at the time of papermaking, and in particular, printing on an offset printing press has no trouble with paper dust and blisters (interlaminar peeling), and has excellent printing runnability, and further has excellent print surface quality with little show-through. It relates to industrial paper.

  In recent years, printing paper has a low ash yield at the time of paper making due to the high speed of paper machines and double-sided dewatering in addition to high fillers and high recycled paper pulp.

  On the other hand, in terms of quality, the most important quality is that it can withstand use in a printing press, and in coated paper for printing, requirements for interlayer strength and surface strength related to troubles with blisters and paper dust are extremely severe. In recent years, in addition to the quality related to the running property, double-sided printing is often performed in color, and therefore, a phenomenon in which an image can be seen through from the opposite side, that is, a so-called show-through, has been increasing year by year.

  It is known that increasing the opacity of the paper is the most effective way to reduce back-through of the coated coated paper for printing. As a method for increasing the opacity of paper, it is effective to increase the ash content in the paper by blending a filler having a high specific scattering coefficient and a large effect of increasing opacity. The increase in ash content in the paper also produces the uniformity of the coating layer by improving the smoothness of the base paper, but in the case of printing coated paper, if the ash content in the base paper is increased, the ash content during papermaking The yield is greatly reduced and stable operation becomes difficult. In addition, due to high ash differentiation, more paper dust accumulates on the blanket in the offset printing press, and due to the decrease in interlayer strength, blistering troubles increase in heat-set type offset rotary presses that dry ink by heat. There is a problem.

  For this reason, it is conceivable to use a yield improver at the time of papermaking, but a cationic or anionic polyacrylamide type yield having a weight average molecular weight of about 10 million at the maximum by the intrinsic viscosity method, which is a conventional yield improver. Maintaining good quality such as 1-component retention formulation with an improver or 2-component retention formulation with the addition of a cationic or anionic polyacrylamide retention improver after the addition of a cationic polyelectrolyte In such a case, a sufficient yield of fine components could not be obtained. Due to this decrease in yield, the concentration of fine components contained in white water that has passed through the wire has increased, and the load on white water treatment equipment such as polydisc filters and flotation separators has increased, resulting in a situation where white water cannot be treated. there were. In addition, as a result of the gradual accumulation of fine components that have passed through the wire in the stock, the solids concentration of the stock supplied to the paper machine stock inlet becomes gradually higher, making the paper unstable, and in the worst case, finally the paper Occasionally, it became impossible. The economic losses due to these paper interruptions can be very significant and extremely serious. In addition, white water discharged as wastewater outside the papermaking system contains a large amount of fine particles, which are valuable resources, and there is a problem that this economic loss is large and the load on the wastewater treatment facility is further increased. .

  If the yield improver is added at a high rate in the one-liquid yield formulation or the two-liquid yield formulation, the yield of fine particles is improved to some extent, but the yield improvement reaches a peak, so that a satisfactory yield cannot be obtained, and the papermaking still remains. There is a problem that it is unstable and the formation of paper obtained by papermaking deteriorates.

  As a technology to improve the yield of fine components at the time of papermaking, for example, when making paper with neutral to weak alkali using a papermaking raw material containing a filler mainly composed of calcium carbonate, it is polymerized into a papermaking raw material in newsprint paper A method of making paper by adding an anionic water-soluble polymer after adding a cationic water-soluble polymer and / or a polycondensation cationic substance is disclosed (see Patent Document 1). In addition, a pulp containing 30 to 100% by weight of mechanical pulp and / or deinked pulp for the purpose of improving the yield and drainage in neutral to alkaline papermaking containing a large amount of mechanical pulp and / or deinked pulp Disclosed is a technology in which a cationic polyelectrolyte, an anionic polymer substance and bentonite are added in this order to a paper material having a solid content concentration of 0.1 to 1.5% by weight and a pH of 6 to 10 comprising a filler and a filler. (See Patent Document 2). In addition, mechanical pulp and / or deinked pulp is used as a total pulp component for the purpose of improving the yield and drainage when making a paper system containing a large amount of mechanical pulp and / or deinked pulp in the neutral to alkaline region. Containing 30 to 100% by weight of pulp and filler, solid content of 0.1 to 1.5% by weight, and pH = 6 to 10 paper, cationic coagulant, phenolic compound, nonion A technique is disclosed in which the coagulant is added in this order and the ratio of the cationic coagulant to the phenolic compound ranges from 25:75 to 75:25 (see Patent Document 3). Although these techniques slightly improve the yield of fine components at the time of paper making, it is still not a sufficient effect.

JP 2002-227093 A Japanese Patent Laid-Open No. 9-250095 Japanese Patent Laid-Open No. 11-247089

  The problem to be solved by the present invention is to provide a coated paper for printing that has a high ash yield at the time of papermaking, a small amount of blisters and paper dust at the time of printing, a high opacity, a low back-through, and an excellent print quality. It is to provide.

  As a result of diligent research, the present inventors have found that a filler treated with a cationic polymer compound containing as a component a homopolymer of diallyldimethylammonium chloride or a copolymer of diallyldimethylammonium chloride and (meth) acrylamide. The present invention has been achieved by obtaining a coated paper for printing which is contained in the base paper and has an ash content in the paper of 3 to 40% by weight. The filler preferably contains calcium carbonate. Moreover, it is preferable that the addition rate with respect to the filler of a cationic high molecular compound is 0.05-2.0 solid content weight% with respect to a filler.

  To obtain coated paper with good printing quality with high filler yield during paper making, low blistering and paper dust generation when used on a printing press, high opacity and low back-through during double-sided printing. Can do.

  The pulp raw material used for the base paper of the coated paper for printing according to the present invention is not particularly limited, and it is hardwood kraft pulp (LKP), softwood kraft pulp (NKP), deinked pulp (DIP), ground pulp. (GP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), etc., as long as they are generally used as a papermaking raw material for paper.

  The filler used for the base paper of the coated paper for printing of the present invention can be any of those usually used. For example, calcium carbonate, clay, silica, kaolin, talc, magnesium carbonate, barium carbonate, barium sulfate, hydroxide Inorganic fillers such as aluminum, zinc oxide and titanium oxide, and organic fillers such as urea-formalin resin, melamine resin, polystyrene resin and phenol resin can be used alone or in combination. Preferred fillers are those containing calcium carbonate. As the calcium carbonate, either heavy calcium carbonate or light calcium carbonate can be used, but light calcium carbonate is preferably used from the viewpoint of wire wear of a paper machine and quality of coated printing paper. Among the light calcium carbonates, it is more preferable that primary particles aggregate to form secondary particles. Among the light calcium carbonates in which primary particles are aggregated to form secondary particles, rosetta type light calcium carbonate is most preferable.

  In the present invention, prior to addition to the stock, the filler is premixed with a homopolymer of diallyldimethylammonium chloride (hereinafter referred to as DADMAC) or a copolymer of DADMAC and (meth) acrylamide. . Details will be described below.

The DADMAC homopolymer used in the present invention or the cationic polymer compound containing a copolymer of DADMAC and (meth) acrylamide as a component can be appropriately selected and used.
(Meth) acrylamide to be copolymerized with DADMAC has a linear or branched alkyl group, specifically, ethylhexyl (meth) acrylamide, diethylaminopropyl (meth) acrylamide, dimethylaminohydroxypropyl. (meth) acrylamide, N- isopropyl (meth) acrylamide, N- tert-butyl - (meth) acrylamides, C 1 ~C 10 N- alkyl (meth) acrylamide, N- allyl alkylamides, N- isopropyl (meth) Examples include acrylamide, N, N-dimethylacrylamide, C 1 to C 10 N, N-dialkylmethacrylamide, N, N-diallyl (meth) acrylamide, N, N-diallylalkyl (meth) acrylamide and the like.

  The weight average molecular weight of the homopolymer of DADMAC or the copolymer of DADMAC and (meth) acrylamide is not particularly limited. The cationic charge density is preferably 0.1 to 50 meq / g, more preferably 0.5 to 10 meq / g. The molar ratio of DADMAC to (meth) acrylamide in the copolymer is preferably set to this charge density. If it exceeds 50 meq / g, the production cost becomes high and is not practical, and if it is less than 0.1 me / g, the effect of improving the filler yield of the present invention becomes small.

  The amount of DADMAC homopolymer or DADMAC and (meth) acrylamide copolymer added to the filler is 0.05 to 2.0 parts by weight, preferably 0.10 to 1.0 parts by weight, based on 100 parts by weight of filler. 0.10 to 0.50 parts by weight are more preferable. If the amount is less than 0.05 parts by weight, the filler yield improving effect is small, and even if the amount exceeds 2.0 parts by weight, the filler yield improving effect reaches its peak.

The solid content concentration of the DADMAC homopolymer or the aqueous dispersion of the filler to which the copolymer of DADMAC and (meth) acrylamide is added is not particularly limited, but is usually 1 to 50% by weight. It is. Although the temperature at the time of mixing does not have limitation in particular, 10-60 degreeC is preferable. The apparatus used for mixing the filler and the polymer is not particularly limited as long as the apparatus can sufficiently perform mixing. For example, a general stirrer having a propeller blade, a turbine blade, a paddle blade, and a disperser High-speed rotary centrifugal type agitators such as high-speed rotary shear type agitators such as homogenizers, homomixers and ultramixers, and emulsifiers such as colloid mills and planetary mixers. In the present invention, the filler is a surface-treated filler by mixing the filler and the polymer, and the filler may be agglomerated.
The average particle size of a filler treated with a homopolymer of DADMAC or a copolymer of DADMAC and (meth) acrylamide is preferably 1.0 to 25 μm by a laser diffraction method. Moreover, the average particle diameter of the treated filler is preferably 1.0 to 3.0 times, more preferably 1.0 to 2.0 times, and still more preferably 1.0 to 1.5 times the average particle diameter of the untreated filler. If it exceeds 3.0 times, there is no problem in the filler yield improvement effect, but since the filler becomes a large aggregate and exists in the paper layer, the effect of improving opacity and whiteness tends to be small.

  The dispersion liquid that has been mixed may be temporarily stored in a tank or the like and then added to the stock. However, it is preferable to add it to the stock immediately after mixing. The effect of the present invention is improved by setting the cation requirement of the paper stock to which the filler is added to 0 μeq / l or more.

The filler rate of the pretreatment filler of the coated paper for printing of the present invention is 3 to 40% by weight as solid content. Preferably it is 3-30 solid weight%, More preferably, it is 3-20 solid weight%. If the solid content is less than 3% by weight, the yield of the filler is good and there is no problem of blisters or paper dust on the offset printing machine, but the opacity is not sufficient, so the back-through is large, and the smoothness is low, so the printing surface is not excellent. There is a problem. If the solid content exceeds 40% by weight, the pulp fiber content is low, so the yield of the filler is lowered, and the amount of paper powder is also problematic. Moreover, as ash content in paper, it is 3-40 solid content weight%. In the present invention, a filler that is not subjected to mixing treatment may be added as long as the effects of the present invention are not impaired.
In the present invention, as internal chemicals other than pulp and filler, neutral sizing agents such as alkyl ketene dimer sizing agents, alkenyl succinic anhydride sizing agents, neutral rosin sizing agents, polyacrylamide, cationization Dry paper strength agents such as starch and wet paper strength agents such as polyamidoamine epichlorohydrin can be added. In order to further increase the yield of the filler, a known inorganic flocculant (sulfuric acid band or the like) or an organic polymer flocculant can be added, and a known high yield system (for example, a hydrocoal system, a compositor system). Etc.) can be used together.

  In the present invention, a bulking agent for paper can also be contained as an internal additive. Usually, by containing a bulking agent, paper strength and (rigidity) tend to decrease, but by using the pretreatment filler of the present invention and a bulking agent in combination, paper strength and (rigidity) imparting effect can be obtained. It is possible to suppress the generation of blisters and paper dust while being bulky. These bulking agents for paper are exemplified in the patent literature as follows. The paper bulking agent described in Japanese Patent No. 3128248, the paper bulking agent described in Japanese Patent No. 3453505, the paper bulking agent described in Japanese Patent No. 3482336, the paper bulking agent described in Japanese Patent No. 3537692, the patent No. 3 No. 3482337, a paper bulking agent described in Japanese Patent No. 2971447, a papermaking paper quality improving agent described in Japanese Patent No. 3283248, a drying efficiency improving agent described in Japanese Patent No. 3387033, and a patent No. 3387036. Smoothness and gas permeability improver described in Japanese Patent No. 3517200, additive for papermaking described in Japanese Patent No. 3517200, paper quality improver described in Japanese Patent Laid-Open No. 2001-248100, and improvement in paper quality described in Japanese Patent Laid-Open No. 2003-336196. Agent, paper opacifier described in JP-A No. 2000-273792, and used paper recycling described in JP-A No. 2002-129497 Additives, additive for recycling used paper described in JP-A-2002-275786, additive for recycling used paper described in JP-A-2002-294586, bulking agent described in JP-A-2002-294594, JP-A-2003-96692 Paper bulking agent described in JP-A-2003-96693, paper-paper recycling additive described in JP-A-2003-96694, waste-paper recycling additive described in JP-A-2003-96695, Paper thickness improver described in JP-A-2003-171897, paper bulking agent described in JP-A-2003-247197, paper bulking agent described in JP-A-2003-253588, and JP-A-2003-253589 Paper bulking agent, paper bulking agent disclosed in JP-A-2003-253590, paper density reducing agent described in JP-A-2003-328297, JP-A-2003-3137 No. 9 paper density reducing agent, paper making additive described in JP-A No. 2004-11058, paper density reducing agent described in JP-A No. 2004-27401, JP-A No. 2004-115935 described Paper densifying agent, paper bulking agent described in JP-A-2004-76244, paper modifier described in JP-A-2004-176213, paper softening agent described in JP-A-3522142, Japanese Patent Application Laid-Open No. 2002-275792, a bulky softening agent described in Japanese Patent Application Laid-Open No. 2002-275792, a paper bulking agent described in Japanese Patent Application Laid-Open No. 2003-286692, and Japanese Patent Application Laid-Open No. 2004-270074. The paper bulking agent composition described in the above, and the paper bulking agent described in JP-A-2004-285490. A bulking agent for paper described in JP-A-2004-339629, a bulking agent described in JP-A-2005-54330, and a bulking agent described in JP-A-2005-68592. Specific examples of the bulking agent for paper include oil-based nonionic surfactants, sugar alcohol-based nonionic surfactants, sugar-based nonionic surfactants, polyhydric alcohol-type nonionic surfactants, polyvalent alcohols Ester compound of alcohol and fatty acid, polyoxyalkylene adduct of higher alcohol or higher fatty acid, polyoxyalkylene adduct of higher fatty acid ester, polyoxyalkylene adduct of polyhydric alcohol and fatty acid ester compound, fatty acid polyamidoamine, straight chain And fatty acid monoamides, unsaturated fatty acid monoamides, unsaturated fatty acid diamide amines, and the like. Preferred bulking agents are polyhydric alcohol and fatty acid ester compounds, fatty acid polyamidoamines, fatty acid diamidoamines, fatty acid monoamides, and polyalkylene polyamine / fatty acid / epichlorohydrin condensates.

The bulking agent is usually added in the range of 0.2 to 20% by solid weight with respect to the raw material pulp. 0.2
If the solid content is less than% by weight, the effect of reducing the density is small, and even if it is added in excess of 20% by weight, the bulky effect reaches its peak, so it is meaningless and cannot be practically used in terms of cost.

  The bulking agent is preferably added after the raw material mixer and before the addition of the mixed slurry composed of the inorganic particles of the present invention, the cationic compound, and the starch paste, and other fillers.

The paper machine used for making the coated paper for printing of the present invention is preferably an on-top former, a gap former, etc. having a double-side dewatering mechanism in order to suppress the two-sided nature of the paper. However, the present invention is not limited to this. The press, calendar, etc. may be processed under conditions within the normal operating range. In the present invention, a surface treatment agent may be applied to the base paper that has been made.
As the surface treatment agent, a surface paper strength agent for the purpose of enhancing the surface strength can be applied. Drugs to be applied include raw starch, oxidized starch, esterified starch, cationized starch, heat-modified starch, enzyme-modified starch, aldehyde-modified starch, hydroxyethylated starch and other modified starches, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, etc. Cellulose derivatives, modified alcohols such as polyvinyl alcohol and carboxyl-modified polyvinyl alcohol, styrene butadiene copolymer, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polyacrylate, polyacrylamide Etc. alone or in combination. Of these, the application of hydroxyethylated starch, which is excellent in surface strength improvement effect, is most preferable.

  In addition to the above-mentioned chemicals, general surface sizing agents such as styrene acrylic acid, styrene maleic acid, and olefinic compounds can be applied in combination, but the ionicity of the sizing agent is cationic. It has been found that a very good surface strength can be obtained. The reason is that since the pre-aggregated filler in the present invention is cationic, the cationic surface sizing agent is applied with the sizing agent remaining on the surface, and the paper size is improved. If the size is improved, the penetration of the coating solution into the base paper is further suppressed.

  When the surface treatment agent comprising the surface paper strength agent and the surface sizing agent is applied to the base paper, the mixing ratio of the surface paper strength agent and the surface sizing agent may be within a known range and is not particularly limited. The apparatus for applying the surface coating agent to the coating base paper is not particularly limited as long as it is a publicly available device such as a blade coater, a gate roll coater, or a size press coater.

  In the present invention, a coating layer mainly composed of a pigment and an adhesive is provided on the base paper obtained by the above method. As the pigment used in the coating layer, those conventionally used as coating pigments for paper can be used. The types of these pigments include inorganic pigments such as clay, kaolin, heavy calcium carbonate, light calcium carbonate, talc, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicate, colloidal silica, and satin white. And organic pigments such as plastic pigments. These pigments can be used alone or in combination of two or more as required.

  The adhesive used in the present invention is conventionally used for coated paper, such as styrene / butadiene, styrene / acrylic, ethylene / vinyl acetate, butadiene / methyl methacrylate, vinyl acetate / butyl acrylate, and the like. Synthetic adhesives such as various copolymers, polyvinyl alcohol, maleic anhydride copolymer, acrylic acid / methyl methacrylate copolymer, casein, soy protein, synthetic protein and other proteins, oxidized starch, cationized starch, One or more kinds of starches such as urea phosphate esterified starch and hydroxyethyl etherified starch, and cellulose derivatives such as carboxymethyl cellulose, hydroxymethyl cellulose, and hydroxyethyl cellulose can be appropriately selected and used. These adhesives are preferably used in the range of 5 to 35 parts by weight with respect to 100 parts by weight of the pigment. When the amount exceeds 35 parts by weight, the viscosity of the coating becomes high, and disadvantages such as the problem of operability such as difficulty in passing through piping and a screen occur, which is not preferable. On the other hand, when the amount is less than 5 parts by weight, a sufficient surface strength cannot be obtained, which is not preferable.

  In the coating liquid of the present invention, various commonly used auxiliaries such as dispersants, thickeners, water retention agents, antifoaming agents, water resistance agents, dyes and fluorescent dyes can be used as auxiliaries.

In the present invention, the method for applying the adjusted coating liquid to the base paper is not particularly limited, and a known coating apparatus can be used. Examples thereof include a blade coater, a bar coater, a roll coater, an air knife coater, a reverse roll coater, a curtain coater size press coater, and a gate roll coater. Using these, one or more layers are coated on one or both sides of the base paper. Preferably the coating weight of the single-sided Atari is 3g / m 2 ~25g / m 2 , more preferably 5g / m 2 ~20g / m 2 , more preferably from 5 to 15 g / m 2. When the coating amount on one side is less than 3 g / m 2 , sufficient base paper coverage is not obtained, and the ink inking property tends to be inferior, and when it exceeds 25 g / m 2 , blisters are easily produced. Tend to be.

  As a method for drying the wet coating layer, for example, usual methods such as a steam heater, a gas heater, an infrared heater, an electric heater, a hot air heater, a microwave, and a cylinder dryer are used.

After drying, if necessary, smoothness can be imparted by finishing processes such as super calendering and high-temperature soft calendering, which are post-processing, and any calendering treatment can be performed as long as coated paper of the desired quality is obtained. Alternatively, uncalendar processing may be used. The density of coated printing paper obtained may be in the range of 0.4~1.3g / m 2.

EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, naturally this invention is not limited to these. In the examples and comparative examples, “%” represents “% by weight” unless otherwise specified.
[Quality evaluation method]
(1) Density According to JIS P 8118: 1998.
(2) Blister resistance Double-sided color printing is performed on an offset rotary press (Toshiba B2T-600) with a 880 mm width winding at a speed of 600 rpm, and a four-color overprinting section (ink density: black 1.80, indigo 1. 50, red 1.45, yellow 1.05, four-color total density 5.80, measured with X-Rite 408), and the paper surface temperature at which blistering occurred was used as an index.
(3) Paper dust After printing 20,000 copies on an offset rotary press, the amount of blanket non-image area deposited paper dust per 100 cm 2 was measured.
(4) Back-through Evaluation was performed by visually observing the four-color solid surface from the back side when printing 20,000 copies on an offset rotary press.
[Pretreatment method of filler]
(1) Pretreatment filler 1: Rosetta-type light calcium carbonate (trade name: TNC-7BY, average particle diameter: 3.0 μm, manufactured by Toyo Denka Co., Ltd.) is used as a filler, and the light calcium carbonate is 15% in terms of solid content. 60 parts by weight of slurry liquid, 75 parts by weight of 0.06 solids weight% liquid of polydiallyldimethylammonium chloride (manufactured by Ondeo Nalco, trade name: N5200, cation charge density: 3.9 meq / g) (filler solids weight) (Corresponding to 0.5%), and the mixture was stirred with a mixer. The average particle size at this time was 3.8 μm, and almost no aggregation occurred. The average particle size of the filler was measured by a laser diffraction scattering method (Mastersizer 2000 manufactured by Sysmex Corporation).
(2) Pretreatment filler 2: Rosetta-type light calcium carbonate (made by Okutama Kogyo Co., Ltd., trade name: TP-221BM, average particle size 3.5 μm) is used as the filler, and polydiallyl is added to 60 parts by weight of this 15% slurry. Added 75 parts by weight of 0.06% solids by weight of dimethylammonium chloride (made by Ondeo Nalco, trade name: N5200, cationic charge density: 3.9 meq / g) (corresponding to 0.5% of filler solids weight) And stirred with a mixer. The average particle size at this time was 21 μm, and aggregation occurred.
(3) Pretreatment filler 3: TNC-7BY was used as a filler, and 60 parts by weight of this 15% slurry liquid was added to 9 parts by weight of a polydiallyldimethylammonium chloride N5200 0.06 solids weight% liquid (filler solids weight (Corresponding to 0.06%) was added and stirred with a mixer. The average particle size at this time was 3.9 μm, and it can be said that almost no aggregation occurred.
(4) Pretreatment filler 4: TP-221BM was used as a filler, and 60 parts by weight of this 15% slurry liquid was added to 9 parts by weight of a polydiallyldimethylammonium chloride N5200 0.06 solids weight% liquid (the filler solids weight (Corresponding to 0.06%) was added and stirred with a mixer. The average particle size at this time was 4.2 μm, and it can be said that almost no aggregation occurred.
[Example 1]
Paper stock prepared by adding pretreatment filler 1 with surface treatment to raw pulp slurry with LKP / NKP = 75/25 and cation requirement of 9 μeq / l in head box at on-top type paper machine at speed of 1000 m / min. Thus, a coated base paper having a ash content of 15% and a basis weight of 50.0 g / m 2 was obtained. The coating solution was prepared as follows.
(Coating fluid 1)
After adding 25 parts of hydroxyethyl etherified starch (PG295 manufactured by Penford) to a pigment slurry consisting of 100 parts of fine heavy calcium carbonate (Fimatech FMT-90), water was added to add 50% solids. A coating liquid 1 was obtained.
(Coating fluid 2)
To 100 parts of a pigment composed of 40 parts of fine kaolin (Japangloss, manufactured by JMHuber) and 60 parts of fine heavy calcium carbonate (FMT-90, manufactured by Phimatech), sodium polyacrylate was added as a dispersant (for inorganic pigments 0 .2 parts) Dispersed with a serie mixer to prepare a pigment slurry having a solid content of 70%. 10 parts of styrene / butadiene copolymer latex (glass transition temperature 20 ° C., gel content 85%) and 6 parts of hydroxyethyl etherified starch (PG295, manufactured by Penford) are added to the pigment slurry thus obtained. After that, water was further added to obtain a coating liquid 2 having a solid concentration of 60%.
The coating base paper, coating the coating liquid 1 by a gate roll coater on-machine after 6 g / m 2 coated and dried on both sides, the coating liquid 2 on one side with a blade coater off machine 8 g / m 2 both sides Worked and dried to obtain a coated paper for printing.
1 example fee is 3 In a printing test using an offset printing machine, the amount of paper dust was measured and the evaluation of back-through was performed.

  Paper yield and ash yield during papermaking were measured by the following methods.

  Solid stock concentration and ash concentration were measured for the stock inlet raw material and white water that had fallen under the wire (described as white water under the wire). Paper yield was measured by the following formula (1), and ash yield was measured by the following formula (2).

Paper yield = 100 x (A-B) / A ... Formula (1)
A: Solid content concentration of stock inlet raw material (g / l)
B: Solid content concentration under white wire (g / l)
Ash content yield = 100 x (C-D) / C ... Formula (2)
C: Ash content of stock inlet raw material (g / l)
D: Ash concentration of white water under wire (g / l)
Ash content measurement: The solid content of the stock inlet raw material and the white water under the wire was ashed at 525 ° C.
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Reference Example 2]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to the pretreatment filler 2. Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Example 3]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to the pretreatment filler 3.

Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Example 4]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to the pretreatment filler 4.

Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 1]
In Example 1, a paper stock obtained by separately adding the light calcium carbonate for the pretreatment filler 1 and polydiallyldimethylammonium chloride for the pretreatment filler 1 in the head box to the raw pulp slurry was made, and the ash content in the paper was 15%. A coated paper for printing was obtained in the same manner as in Example 1, except that the coated base paper was obtained. The ratio of light calcium carbonate to diallyldimethylammonium chloride was the same as that of the pre-agglomerated filler 1. Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 2]
In Example 1, a paper stock in which the light calcium carbonate for the pretreatment filler 2 and polydiallyldimethylammonium chloride were separately added in a head box was made into a slurry of raw pulp, and the ash content in the paper was 15 A coated paper for printing was obtained in the same manner as in Example 2 except that% coated base paper was obtained. Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 3]
A coated paper for printing was obtained in the same manner as in Example 1 except that the ash content in the paper was 2%.
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 4]
A coated paper for printing was obtained in the same manner as in Example 1 except that the ash content in the paper was 45%.
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 5]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to TNC-7BY.

Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 6]
A coated paper for printing was obtained in the same manner as in Example 2 except that the pretreatment filler 2 was changed to TP-221BM.

  Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.


In Examples 1 and 2, it can be seen that the filler yield, blister resistance, paper dust, and back-through are all good. From the comparison between Examples 1 and 2 and Comparative Examples 1 and 2, the method in which the filler and the treating agent are added separately from the one in which the pretreated filler is added has a lower filler yield, and blister resistance after printing. It turns out that it is inferior and paper powder is inferior. Comparative Example 3 with a small amount of ash in the paper is inferior in see-through and the like, and Comparative Example 4 with a large amount of ash in the paper is inferior in blister resistance and has a large amount of paper dust. It can be seen that Comparative Examples 5 and 6 in which the filler was not pretreated have a low filler yield, poor blister resistance, and a large amount of paper dust.

Claims (5)

  1. In a printing paper provided with a coating layer containing a pigment and an adhesive on a base paper, a homopolymer of diallyldimethylammonium chloride in an aqueous dispersion of a filler having a solid content concentration of 1 to 50% by weight, or An average particle size obtained by adding a cationic polymer compound containing as a component a copolymer of diallyldimethylammonium chloride and (meth) acrylamide and having an average particle size of 1.0 to 3. A coated paper for printing, wherein the base paper contains 0 times the inorganic filler, and the ash content of the base paper is 3 to 40% by weight in solid content.
  2. The coated paper for printing according to claim 1, wherein the inorganic filler contains calcium carbonate.
  3. 3. The printing according to claim 1, wherein the addition ratio of the cationic polymer compound to the inorganic filler is 0.05 to 2.0% by weight as a polymer solid content with respect to the inorganic filler. Coated paper.
  4. In a method for producing a coated paper for printing, in which a coating liquid containing a pigment and an adhesive is applied to a base paper obtained by making a paper mainly composed of pulp and filler, the solid content concentration is 1 to 50 wt. A cationic polymer compound containing as a component a homopolymer of diallyldimethylammonium chloride or a copolymer of diallyldimethylammonium chloride and (meth) acrylamide to an aqueous dispersion of 1% filler. The inorganic filler with an average particle size of 1.0 to 3.0 times that of the untreated filler obtained by the above process is added to the paper, and the paper is made so that the ash content in the paper is 3 to 40% by weight. A method for producing a coated paper for printing, comprising producing a base paper.
  5. 5. The printing coating according to claim 4, wherein the addition ratio of the cationic polymer compound to the inorganic filler is 0.05 to 2.0% by weight as a polymer solid content with respect to the inorganic filler. A method of manufacturing paper.
JP2006081753A 2006-03-23 2006-03-23 Coated paper for printing and method for producing the same Active JP4865374B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006081753A JP4865374B2 (en) 2006-03-23 2006-03-23 Coated paper for printing and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006081753A JP4865374B2 (en) 2006-03-23 2006-03-23 Coated paper for printing and method for producing the same

Publications (2)

Publication Number Publication Date
JP2007254922A JP2007254922A (en) 2007-10-04
JP4865374B2 true JP4865374B2 (en) 2012-02-01

Family

ID=38629438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006081753A Active JP4865374B2 (en) 2006-03-23 2006-03-23 Coated paper for printing and method for producing the same

Country Status (1)

Country Link
JP (1) JP4865374B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5302528B2 (en) * 2007-11-07 2013-10-02 日本製紙株式会社 Coated base paper and coated paper manufacturing method
JP2010090500A (en) * 2008-10-07 2010-04-22 Daio Paper Corp Coated paper for printing and method for producing the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748340A (en) * 1980-06-30 1982-03-19 Calgon Corp Filter aid and pigment dispersant
US5755930A (en) * 1994-02-04 1998-05-26 Allied Colloids Limited Production of filled paper and compositions for use in this
US5827398A (en) * 1996-02-13 1998-10-27 Allied Colloids Limited Production of filled paper
JPH1060794A (en) * 1996-08-14 1998-03-03 Oji Paper Co Ltd Production of paper in which filler is internally added
JP2004100119A (en) * 2002-09-13 2004-04-02 Nippon Paper Industries Co Ltd Method for producing filler-containing paper by using coagulated filler particle
JP4600864B2 (en) * 2004-01-13 2010-12-22 王子製紙株式会社 Coated paper for web offset printing
JP2005299005A (en) * 2004-04-09 2005-10-27 Daio Paper Corp Coating liquid for paper and coated paper using the same
JP2006037258A (en) * 2004-07-23 2006-02-09 Daio Paper Corp Coated paper
JP2007239130A (en) * 2006-03-07 2007-09-20 Nippon Paper Industries Co Ltd Clear-coated printing paper

Also Published As

Publication number Publication date
JP2007254922A (en) 2007-10-04

Similar Documents

Publication Publication Date Title
JP2017203243A (en) Compositions
JP5351586B2 (en) Coated paper for offset printing
JP4624549B2 (en) Compositions and methods for improved ink jet printing performance
RU2311507C2 (en) Swelled starch-latex compositions used in papermaking
CA2609411C (en) Polymer-pigment hybrids for use in papermaking
CN101688371B (en) Process for producing coated-paper base and for producing coated paper
DE3017763C2 (en)
KR950007186B1 (en) Production of paper and paper board
ES2306700T3 (en) Coating process and composition for the covering of a paper band.
US4798653A (en) Retention and drainage aid for papermaking
AU2002247795B2 (en) Fibrous web and process for the preparation thereof
JP5114729B2 (en) Calcium carbonate particles and news paper for cold offset printing
JP6473493B2 (en) Pigment composition
US8404084B2 (en) Latex-treated filler slurries for use in papermaking
KR100766728B1 (en) Off-set printing paper for newspapers
US6824651B2 (en) Talc composition and use in paper products
JP5067967B2 (en) Electrophotographic transfer paper
US4913775A (en) Production of paper and paper board
EP1488040B1 (en) Paper and materials and processes for its production
CN109072551B (en) Paper and paperboard products
JP5416531B2 (en) Filler pretreatment method and paper containing pretreated filler
JP5192191B2 (en) Newspaper
JP5788013B2 (en) Paper reinforcement treatment with reduced calcium chloride
JP2016166444A (en) Paper making method of paper and paper board
KR101691029B1 (en) A method to increase dewatering, sheet wet web strength and wet strength in papermaking

Legal Events

Date Code Title Description
RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20080314

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090113

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101224

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110201

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20110324

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110324

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20110324

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110628

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20110815

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110815

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111101

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111110

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141118

Year of fee payment: 3