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WO2019039364A1 - Papier d'impression offset pour fixation à froid - Google Patents

Papier d'impression offset pour fixation à froid Download PDF

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Publication number
WO2019039364A1
WO2019039364A1 PCT/JP2018/030360 JP2018030360W WO2019039364A1 WO 2019039364 A1 WO2019039364 A1 WO 2019039364A1 JP 2018030360 W JP2018030360 W JP 2018030360W WO 2019039364 A1 WO2019039364 A1 WO 2019039364A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
weight
offset printing
printing paper
parts
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.)
Ceased
Application number
PCT/JP2018/030360
Other languages
English (en)
Japanese (ja)
Inventor
川島　正典
遼 外岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Original Assignee
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
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 Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Priority to JP2019537580A priority Critical patent/JPWO2019039364A1/ja
Publication of WO2019039364A1 publication Critical patent/WO2019039364A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • 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
    • D21H19/72—Coated paper characterised by the paper substrate
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters

Definitions

  • the present invention relates to a coldset offset printing sheet.
  • Patent Document 1 proposes a newspaper ink-compatible finely coated paper provided with a specific pigment coating layer.
  • Patent Document 2 proposes newsprint paper provided with a pigment coated layer of 0.3 to 3.0 g / cm 2 per one side. The newsprint is said to have good ink drying properties.
  • Patent Document 3 proposes a microcoated paper provided with a pigment coated layer of 0.5 to 3.0 g / cm 2 per one side. The said finely coated paper is excellent in ink drying property, and the clearness of a printing image is also favorable.
  • each of the papers described in Patent Documents 1 to 3 has a low density because it contains a large amount of mechanical pulp and deinking pulp and a bulking agent, and thus the paper has many voids between fibers. It was found that the ink drying property was good, but the ink penetrated the inside of the base paper excessively due to the low density, so that the ink coloring property was not sufficient. Then, the inventors have found that by using a large amount of chemical pulp to improve the density, it is possible to achieve both the ink drying property and the ink coloring property. Therefore, the above-mentioned subject is solved by the following present invention.
  • a coldset offset printing paper comprising a pigment coated layer on a base paper, The basis weight is 40 to 70 g / m 2 , The coating amount of the pigment coating layer is less than 5 g / m 2 per one side, 30 parts by weight or more of chemical pulp in 100 parts by weight of pulp in the base paper Offset printing paper for cold setting.
  • the offset printing paper for cold set of (1) or (2) which contains 50 parts by weight or less of used paper pulp in 100 parts by weight of pulp in the base paper.
  • a printing method comprising printing on the coldset offset printing paper according to any one of (1) to (7) using a rotary press.
  • X to Y includes X and Y which are final values.
  • the coldset offset printing paper of the present invention (hereinafter, also simply referred to as the "printing paper of the present invention") comprises a specific amount of a pigment-coated layer on one side or both sides of a base paper.
  • the pigment coating layer is a layer containing a white pigment as a main component.
  • the printing paper of the present invention has a pigment coating layer of less than 5 g / m 2 per side.
  • the coating amount is preferably 1.5 to 4.0 g / m 2 per one side.
  • Commonly used pigments such as calcium carbonate, kaolin, clay, calcined kaolin, amorphous silica, zinc oxide, aluminum oxide, satin white, aluminum silicate, magnesium silicate, magnesium carbonate, titanium oxide, plastic pigments and the like as white pigments Can be mentioned. Above all, it is preferable to contain calcium carbonate having an average particle diameter of 0.5 to 1.0 ⁇ m from the viewpoint of improving the ink penetration property and improving the smoothness of the printing paper.
  • the average particle size can be measured by a laser diffraction type particle size distribution measuring instrument such as Mastersizer manufactured by Malvern.
  • the content of particles having a particle diameter of 2.0 ⁇ m or less is preferably 90% by volume or more, more preferably 93% by volume or more, and still more preferably 95% by volume or more.
  • Examples of calcium carbonate include ground calcium carbonate and light calcium carbonate. Alternatively, light calcium carbonate (causticized light calcium carbonate) described in Japanese Patent No. 5274077 and the like may be used as light calcium carbonate.
  • the calcium carbonate content is preferably 50 parts by weight or more, and more preferably 70 parts by weight or more in 100 parts by weight of the white pigment.
  • the upper limit of calcium carbonate content is not limited, 100 parts by weight or less is preferable, and 90 parts by weight or less is more preferable.
  • the 50% volume average particle diameter (D50) measured by the above-mentioned laser diffraction type particle size distribution measuring device or the like can be used as the average particle diameter of the pigment. By containing 50 parts by weight or more of calcium carbonate, highly white printing paper can be obtained.
  • kaolin or clay in the pigment coating layer in order to improve the ink drying property and the smoothness.
  • the kaolin or clay is preferably 10 parts by weight or more in 100 parts by weight of the white pigment.
  • the upper limit is preferably 30 parts by weight or less in 100 parts by weight of the white pigment.
  • the total amount of both is between the said upper limit and lower limit.
  • the pigment coating layer contains an adhesive.
  • the adhesive include etherified starches such as oxidized starch, positive starch, urea phosphate-esterified starch, hydroxyethyl etherified starch, various starches such as dextrin, proteins such as casein, soybean protein, synthetic protein, and polyvinyl alcohol Alcohol, cellulose derivatives such as carboxymethyl cellulose and methyl cellulose, styrene-butadiene copolymer, conjugated diene polymer latex of methyl methacrylate-butadiene copolymer, vinyl polymer such as acrylic polymer latex, ethylene-vinyl acetate copolymer Polymer latex etc. are mentioned. These can be used alone or in combination of two or more.
  • the total amount of the adhesive in the pigment coating layer is preferably 1 to 15 parts by weight, more preferably 2 to 14 parts by weight, and still more preferably 3 to 13 parts by weight with respect to 100 parts by weight of the pigment. If the amount of the adhesive is less than 1 part by weight, the adhesive is insufficient and the strength of the coated layer is weakened, so that many defects such as white spots may occur during printing. On the other hand, if the amount is more than 15 parts by weight, the voids in the pigment coating layer will be insufficient, making it difficult for the penetration type cold set ink to penetrate the paper, and the drying property may be poor.
  • the pigment coating layer may contain various assistants such as dispersants, thickeners, antifoaming agents, colorants, antistatic agents, preservatives and the like used in the general paper manufacturing field.
  • the pigment coating layer can be provided by coating the coating liquid on one side or both sides of the base paper by a known method.
  • the solid content concentration in the coating liquid is preferably about 30 to 70% by weight from the viewpoint of coating suitability.
  • the pigment coating layer may be one or more layers, but is preferably one layer because the amount of coating is small.
  • the coating amount of the pigment coating layer is less than 5 g / m 2 in total per one side, and preferably 4 g / m 2 or less.
  • the lower limit is preferably 1.5 g / m 2 or more.
  • the raw material of the base paper used in the present invention is not particularly limited, and mechanical pulp such as grand pulp (GP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), waste paper pulp (deinked pulp Chemical pulps such as DIP), softwood kraft pulp (NKP), softwood kraft pulp (LKP) and the like can be used.
  • mechanical pulp such as grand pulp (GP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), waste paper pulp (deinked pulp Chemical pulps such as DIP), softwood kraft pulp (NKP), softwood kraft pulp (LKP) and the like can be used.
  • waste paper pulp classified waste paper such as high-grade paper, medium-grade paper, lower grade paper, newspaper, flyers, magazines and non-sorted waste paper derived from mixed waste paper can be used, but medium-grade paper containing mechanical pulp It is preferable that the waste paper pulp contains lower grade paper or newsprint as a raw material.
  • the printing paper of the present invention contains 30 parts by weight or more of chemical pulp in 100
  • the density of printing paper can be improved, and excessive penetration of the ink into the deep part of the base paper can be suppressed, whereby the ink coloring property can be improved.
  • the lower limit of the chemical pulp content is preferably 40 parts by weight or more, and more preferably 50 parts by weight or more.
  • the upper limit of the chemical pulp content is preferably 90 parts by weight or less, and more preferably 80 parts by weight or less.
  • the printing paper of the present invention preferably contains mechanical pulp or waste paper pulp containing mechanical pulp in an amount of 10 parts by weight or more in total, and more preferably 20 parts by weight or more in 100 parts by weight of pulp. .
  • the upper limit of the total amount is preferably 50 parts by weight or less. If the total amount exceeds this value, the density may be lowered to lower the ink color developability, and furthermore, the whiteness may be lowered and the image brightness may be lowered.
  • fillers can be added to the base paper.
  • fillers heavy calcium carbonate, light calcium carbonate, clay, silica, light calcium carbonate-silica composite, kaolin, calcined kaolin, delami kaolin, magnesium carbonate, barium carbonate, barium sulfate, aluminum hydroxide, calcium hydroxide, Inorganic fillers such as magnesium hydroxide, zinc hydroxide, zinc oxide, titanium oxide, amorphous silica produced by neutralization of sodium silicate with mineral acid, urea-formalin resin, melamine resin, polystyrene resin, phenol Organic fillers such as resins may be mentioned. These may be used alone or in combination. Among these, calcium carbonate and light calcium carbonate-silica composites, which are typical fillers in neutral paper making and alkaline paper making, and which can obtain high opacity, are preferable.
  • bulking agents dry strength improvers, wet strength improvers, freeness improvers, dyes, neutral sizing agents and the like may be used as necessary.
  • dry strength improver include polyacrylamide and cationic starch
  • wet strength improver include polyamidoamine epichlorohydrin. These chemicals are added in the range which does not have influence, such as formation and operativity.
  • the neutral sizing agent includes alkyl ketene dimer, alkenyl succinic anhydride, neutral rosin sizing agent and the like.
  • the base paper is manufactured by a known papermaking method.
  • a known papermaking method for example, although it can be carried out using a Fourdrinier paper machine, a gap former type paper machine, a hybrid former type paper machine, an on-top former type paper machine, a round net paper machine, etc., it is not limited thereto.
  • the offset printing paper for cold setting of the present invention may be manufactured by an on-machine method in which a paper making process and a pigment coating process are continuous, and manufactured by an off-machine system in which coating is performed in a pigment coating process after the paper making process. You may The paper making and coating speed is preferably 400 to 2000 m / min.
  • the printing paper of the present invention may further have a clear coating layer mainly composed of an adhesive on one side or both sides of the base paper.
  • the clear coating layer is preferably adjacent to the base paper layer, but may be provided on the outermost layer farthest from the base paper.
  • the adhesive used for the clear coating layer is as described above.
  • a clear coating layer is provided adjacent to the base paper, it is possible to suppress the penetration of the pigment coating liquid into the base paper and to improve the base paper coverage of the pigment coating layer, which is preferable as an adhesive to be used. Starch is preferred.
  • the strength of the base paper is improved by the penetration of the clear coating liquid into the base paper.
  • the coating amount of the clear coating layer is preferably 0.5 g / m 2 or more and 5.0 g / m 2 or less on both sides, more preferably 1.0 g / m 2 or more and 4.5 g / m 2 or less. More preferably, it is 2.0 g / m 2 or more and 4.0 g / m 2 or less.
  • the printing paper of the present invention may be subjected to surface treatment.
  • the surface treatment includes treatment with a soft calendar, a super calendar, a gloss calendar, a heat calendar, and a shoe calendar.
  • Basis Weight of the printing paper of the present invention is 40 to 70 g / m 2 . If the basis weight exceeds the upper limit, the weight per one book will be large when the printed matter is made into a book or the like, which may reduce the transport efficiency. In addition, if it is less than the lower limit, there is a possibility that problems occur in the printing and processing steps due to lack of rigidity of the paper, and furthermore, the ink is transmitted to the back side of the paper due to lack of opacity and the print quality of the back side There is a possibility of damage.
  • the density of the printing paper of the present invention is preferably 0.7 to 1.3 g / cm 3 . If the density exceeds the upper limit, paper stiffness may be reduced. If the amount is less than the lower limit, ink penetration may be excessive. Furthermore, when the density of the paper is low, the smoothness of the paper tends to be reduced, and the ink color developability may be reduced. From this viewpoint, the lower limit value of the density is preferably 0.75 g / cm 3 or more, and more preferably 0.8 g / cm 3 or more. The upper limit value of the density is preferably 1.3 g / cm 3 or less, more preferably 1.2 g / cm 3 or less, and still more preferably 1.0 g / cm 3 or less.
  • the printing paper of the present invention preferably has Oken type smoothness (JIS P8155) of 10 to 200 seconds. If this value exceeds the upper limit, the penetration speed of the ink may be slowed and the drying property may be reduced. If the value is less than the lower limit, the ink coloring property may be reduced.
  • JIS P8155 Oken type smoothness
  • the printing paper of the present invention preferably has an ISO whiteness (JIS P8148) of 70% or more, more preferably 75% or more.
  • ISO whiteness JIS P8148
  • the degree of whiteness is less than 70%, the degree of whiteness of the white paper portion may be reduced, and the brightness of the image after printing may also be reduced.
  • the printing paper of the present invention is produced through the step of providing a pigment coating layer of the coating amount by blade coating on one side or both sides of the base paper.
  • the pigment coating layer can also be provided by roll coating in addition to this, but blade coating is a coating method in which the coating liquid is scraped off with a blade after coating, so a coated surface with high smoothness should be obtained. It is possible to obtain a printing sheet with good ink colorability.
  • the printing paper of the present invention exhibits excellent ink drying properties and ink colorability in coldset offset printing, and is therefore suitable for coldset offset printing.
  • the printing paper of the present invention is most suitable as a textbook for which such characteristics are required.
  • Example 1 A stock containing 30% by weight of NBKP, 23% by weight of LBKP, 27% by weight of deinked pulp, and 12% by weight of light calcium carbonate as a filler is prepared as a base paper, and papermaking is carried out. Density 0.75 g / cm 3 , basis weight A printing paper of 61 g / m 2 was prepared.
  • the pigment coating liquid was coated by a blade coater on one side of the base paper so that the dry coating amount would be 1.0 g / m 2, and then dried to obtain printing paper.
  • the said printing paper was evaluated by the method mentioned later.
  • Example 2 and 3 Printing paper was obtained and evaluated in the same manner as in Example 1 except that the coating amount was changed to 2.9 g / m 2 and 4.5 g / m 2 , respectively.
  • Example 4 Printing paper was obtained in the same manner as in Example 1 except that the base paper pulp was changed to 25% by weight of NBKP, 5% by weight of LBKP, 55% by weight of deinked pulp, and 15% by weight of GP.
  • Comparative Examples 1 and 2 Printing paper was obtained and evaluated in the same manner as in Example 1 except that the coating amount was changed to 5.5 g / m 2 and 7.5 g / m 2 , respectively.
  • Ink drying property Offset printing (4 colors) for cold set is performed with an offset rotary press (B2T-600, manufactured by Toshiba Corporation), and the surface of the printing part is rubbed with a finger for 2 to 3 minutes after printing. The dryness was evaluated. The ink drying property was evaluated for the character part, the halftone dot part, and the solid part, and they were integrated to determine the ink drying property of the printing surface. A: The drying property is excellent without rubbing the ink. B: The ink slightly rubs but there is no problem in use. C: The ink is not dry and can not be used.

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  • Paper (AREA)

Abstract

L'invention concerne un papier d'impression permettant d'obtenir d'excellentes propriétés de séchage d'encre et d'excellentes propriétés de coloration d'encre par impression offset pour une fixation à froid. Le papier d'impression offset pour fixation à froid selon l'invention comprend une couche revêtue de pigment sur du papier de base, a un poids de base de 40 à 70 g/m2, a un volume de revêtement de couche revêtue de pigment inférieur à 5 g/m2 par côté, et comprend, dans le papier de base, au moins 30 parties en poids de pâte chimique pour 100 parties en poids de pâte.
PCT/JP2018/030360 2017-08-25 2018-08-15 Papier d'impression offset pour fixation à froid Ceased WO2019039364A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019537580A JPWO2019039364A1 (ja) 2017-08-25 2018-08-15 コールドセット用オフセット印刷用紙

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-162625 2017-08-25
JP2017162625 2017-08-25

Publications (1)

Publication Number Publication Date
WO2019039364A1 true WO2019039364A1 (fr) 2019-02-28

Family

ID=65438895

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/030360 Ceased WO2019039364A1 (fr) 2017-08-25 2018-08-15 Papier d'impression offset pour fixation à froid

Country Status (2)

Country Link
JP (1) JPWO2019039364A1 (fr)
WO (1) WO2019039364A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08276675A (ja) * 1995-04-06 1996-10-22 New Oji Paper Co Ltd 溶融型熱転写記録用受像紙
JP2006307370A (ja) * 2005-04-27 2006-11-09 Oji Paper Co Ltd コールドセット型オフセット用新聞用紙
JP2008280662A (ja) * 2007-04-12 2008-11-20 Oji Paper Co Ltd コールドオフセット印刷用新聞用紙
JP2009074202A (ja) * 2007-09-21 2009-04-09 Oji Paper Co Ltd オフセット印刷用紙製造方法およびオフセット印刷用紙
JP2012117174A (ja) * 2010-12-02 2012-06-21 Oji Paper Co Ltd コールドセット用オフセット印刷用紙
JP2015145543A (ja) * 2014-02-03 2015-08-13 三菱製紙株式会社 筆記用紙

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4508523B2 (ja) * 2001-09-10 2010-07-21 王子製紙株式会社 印刷用塗被紙
JP5047458B2 (ja) * 2004-12-02 2012-10-10 日本製紙株式会社 印刷用塗工紙
JP2007270377A (ja) * 2006-03-31 2007-10-18 Nippon Paper Industries Co Ltd 印刷用微塗工紙
JP5547421B2 (ja) * 2009-03-31 2014-07-16 日本製紙株式会社 印刷用紙の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08276675A (ja) * 1995-04-06 1996-10-22 New Oji Paper Co Ltd 溶融型熱転写記録用受像紙
JP2006307370A (ja) * 2005-04-27 2006-11-09 Oji Paper Co Ltd コールドセット型オフセット用新聞用紙
JP2008280662A (ja) * 2007-04-12 2008-11-20 Oji Paper Co Ltd コールドオフセット印刷用新聞用紙
JP2009074202A (ja) * 2007-09-21 2009-04-09 Oji Paper Co Ltd オフセット印刷用紙製造方法およびオフセット印刷用紙
JP2012117174A (ja) * 2010-12-02 2012-06-21 Oji Paper Co Ltd コールドセット用オフセット印刷用紙
JP2015145543A (ja) * 2014-02-03 2015-08-13 三菱製紙株式会社 筆記用紙

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