WO2014057944A1 - 産業用インクジェット印刷機による印刷物製造方法 - Google Patents
産業用インクジェット印刷機による印刷物製造方法 Download PDFInfo
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- WO2014057944A1 WO2014057944A1 PCT/JP2013/077367 JP2013077367W WO2014057944A1 WO 2014057944 A1 WO2014057944 A1 WO 2014057944A1 JP 2013077367 W JP2013077367 W JP 2013077367W WO 2014057944 A1 WO2014057944 A1 WO 2014057944A1
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- particle size
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- calcium carbonate
- heavy calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
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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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
Definitions
- the present invention relates to a method for producing printed matter using an industrial inkjet printer.
- Industrial inkjet printers that use an inkjet recording method are well known as industrial or commercial printers for producing a large number of commercial prints because of rapid advances in inkjet recording technology (for example, patents) References 1 and 2, Non-Patent References 1 and 2).
- Industrial inkjet printers are sold under the names such as Truepress Jet from Dainippon Screen Mfg. Co., Ltd., MJP series from Miyakoshi Co., Prosper and VERSAMARK from Kodak, and JetPress from Fuji Film.
- Such an industrial inkjet printing machine although depending on printing conditions, has a color printing speed of 10 times to several tens of times faster than that for general household and SOHO inkjet printers and large-format inkjet printers, and a printing speed of 15 m. / Min., More than 60 m / min at higher speeds. For this reason, industrial inkjet printers are distinguished from general household and SOHO inkjet printers and large format inkjet printers.
- Industrial inkjet printers can handle variable information and can adapt to on-demand printing.
- Printers print fixed information on conventional printing machines such as gravure, offset, letterpress, flexographic, thermal transfer or toner printers, and variable information on industrial inkjet printers. In many cases, such a form is adopted.
- conventional printing coated paper such as offset printing coated paper is insufficient in printability in terms of ink fixing or ink absorption capacity with respect to industrial inkjet printers. For this reason, the image is contaminated, and the image quality sufficient for the product cannot be obtained.
- Conventional ink jet printer paper is insufficient in printability in terms of the coating layer strength of conventional printers such as offset printers. For this reason, a printing defect such as blanket piling occurs in the offset printing machine, and a sufficient image quality as a product cannot be obtained.
- conventional inkjet printer paper does not assume the printing speed of an industrial inkjet printer, it has printability in terms of ink absorption speed or dot diffusion of ink droplets for an industrial inkjet printer. It is insufficient.
- the dot diffusion is a quality in which ink droplets that have landed on the coated paper are sufficiently diffused to fill the gaps between the ink droplets.
- JP2011-251231A Japanese Patent Laying-Open No. 2005-088525
- a method for producing printed matter that can be commercialized using an industrial inkjet printer has not been sufficiently established. Furthermore, a method for producing a printed matter that has a sufficient image quality as a product by an industrial inkjet printer and a sufficient image quality as a product by a conventional printing machine and can be a product has not been sufficiently established. In particular, it has not been sufficiently established in a method for producing printed matter that can be a product such as a booklet, a catalog, or a pamphlet that requires image quality compared to leaflets that are not related to image quality.
- a first object of the present invention is to provide a method for producing a printed matter that can be a product using an industrial inkjet printer.
- the second object of the present invention is to provide a method for producing a printed matter that can be commercialized by printing using a conventional printer before or after printing using an industrial inkjet printer.
- the first problem of the present invention is that Including printing on coated paper for printing using an industrial inkjet printer,
- the industrial inkjet printer has a printing speed of 60 m / min or more
- the printing coated paper includes a support and a coating layer, and the coating layer has a volume-based particle size distribution with a cumulative frequency of a particle size of 1.0 ⁇ m or less of 95% by volume or more and an average particle size of It is achieved by a printed matter production method using an industrial inkjet printer, characterized by containing 60% by mass or more of heavy calcium carbonate of 0.1 ⁇ m or more and 0.28 ⁇ m or less in the total pigment of the coating layer.
- the printed matter which can be printed using an industrial inkjet printer and can become a product can be manufactured.
- the second object of the present invention is to provide a gravure printing machine, an offset printing machine, a letterpress printing machine, a flexographic printing machine, and a thermal transfer printing machine before or after the step of printing on a coated paper for printing using the industrial inkjet printing machine.
- a printing method using the industrial inkjet printer further comprising a step of printing using a printer other than the industrial inkjet printer selected from the toner printer.
- the particle size distribution map of the heavy calcium carbonate corresponding to "heavy calcium carbonate 1b" of an Example is shown.
- the particle size distribution figure of the commercial heavy calcium carbonate corresponding to "heavy calcium carbonate 13" of an Example is shown.
- Industrial inkjet printers are classified into continuous paper type and cut paper type depending on the paper conveyance.
- Ink types to be mounted include an aqueous dye ink whose color material is a dye and an aqueous pigment ink whose color material is a pigment.
- any paper conveyance or ink type of the industrial inkjet printing machine may be used.
- variable information and fixed information exist in the image to be printed, a part or all of the fixed information can be transferred from conventional methods such as gravure printers, offset printers, letterpress printers, flexographic printers, thermal transfer printers or toner printers. It is preferable to print using a printing machine. In particular, an offset printing machine is preferable in terms of manufacturing cost and printing quality.
- Conventional printing with a printing press may be before or after the step of printing using an industrial inkjet printing press. If the image area of the variable information and the fixed information overlap, the industrial inkjet printing part may be covered with the ink of a conventional printing machine, making it difficult to see. Preferably it is done.
- the coating layer of the coated paper is covered with the ink of the conventional printing machine. Ink absorption capacity may be insufficient. Therefore, the coated paper needs to further increase the ink absorption capacity for an industrial inkjet printer.
- a conventional printing machine is, for example, a gravure printing machine, an offset printing machine, a letterpress printing machine, a flexographic printing machine, a thermal transfer printing machine, or a toner printing machine.
- the gravure printing machine is a type of printing machine that transfers ink to a printing medium through a roll-shaped plate cylinder in which an image is engraved.
- the offset printing machine is an indirect printing type printing machine in which ink is once transferred to a blanket and then transferred again to a printing medium.
- the letterpress printing machine is a letterpress type printing machine that performs printing by applying pressure so that the ink applied to the letterpress is pressed against the printing medium.
- the flexographic printing machine is a relief printing system that uses a flexible and elastic resin plate.
- the thermal transfer printer is a printer that uses ink ribbons of various colors, and is a printer that transfers a color material from an ink ribbon to a printing medium by heat.
- the toner printing machine is an electrophotographic printing machine that transfers toner to a printing material using static electricity from toner adhering to a charging drum.
- image quality sufficient as a product means that after printing, peeling of the coating layer, smearing of the image of the printed matter due to ink fixing failure or toner fixing failure, and the printed matter due to insufficient ink absorption speed or ink absorption capacity. This means that there are no smudges or blurs in the image.
- “sufficient image quality as a product” means that white spots do not occur in printed parts due to defective dot diffusion of ink droplets that have landed on the substrate in industrial inkjet printers, and blankets in offset printers. Includes no piling.
- the “printed material that can be a product” is a printed product having “image quality sufficient as a product”.
- the printed matter manufacturing method using the industrial inkjet printer of the present invention includes a step of printing on a coated paper for printing using the industrial inkjet printer.
- the printing speed of the industrial inkjet printer is 60 m / min or more. Industrial inkjet printing is possible even at a printing speed lower than this, but the printing speed at which the effect of the present invention is remarkably recognized is 60 m / min or more.
- the printing speed is preferably 100 m / min or more, and more preferably 150 m / min or more in order to improve the production efficiency of printed matter.
- the printing speed is calculated from the paper size to be printed per minute.
- the printing coated paper includes a support and a coating layer. By having a coating layer, it is possible to obtain a texture similar to that of CWF-Paper on offset printing paper.
- the coating layer of the present invention is a heavy calcium carbonate having a volume-based particle size distribution in which the cumulative frequency of particle diameters of 1.0 ⁇ m or less is 95% by volume or more and the average particle diameter is 0.1 ⁇ m or more and 0.28 ⁇ m or less. Containing.
- the heavy calcium carbonate does not contain particles having a particle diameter of more than 1.5 ⁇ m. The reason for this is that it is possible to further suppress the occurrence of smudges on the printed image in industrial inkjet printing.
- the particle size distribution is a particle size distribution based on the volume measured by a laser diffraction / scattering particle size analyzer.
- the average particle diameter is an average particle diameter based on a particle size distribution measurement based on a volume using a laser diffraction / scattering method or a dynamic light scattering method.
- the average particle size is the average particle size of single particles in the case of single particles, and the average particle size of aggregated particles when forming aggregated particles such as secondary particles.
- the half-width of the maximum peak in the average particle diameter, cumulative frequency, and particle size distribution curve can be calculated from the obtained particle size distribution.
- the particle size distribution, average particle size, cumulative frequency, and half width of the maximum peak in the particle size distribution curve can be calculated by measuring the particle size distribution using a laser diffraction / scattering type particle size distribution measuring instrument Microtrac MT3300EXII manufactured by Nikkiso Co., Ltd. it can.
- the average particle diameter of heavy calcium carbonate, the cumulative frequency, and the half width of the maximum peak in the particle size distribution curve can also be determined from the state of the coated paper.
- a scanning electron microscope with an element analysis function such as an energy dispersive X-ray spectrometer is used to take an electron micrograph of the coated paper surface, and the area of the photographed heavy calcium carbonate particles is
- This is a method of calculating from a particle size distribution obtained by calculating a particle diameter on the assumption of an approximate spherical shape and measuring 100 particles present in a photographed image.
- a particle size distribution curve in which the vertical axis represents frequency (%) and the horizontal axis represents particle diameter ( ⁇ m) can be obtained from particle diameter data measured from 100 particles using particle image analysis software. From the obtained particle size distribution curve, the full width at half maximum can be determined as the width at the half height of the peak height of the maximum peak.
- the maximum peak means the highest peak among one or more peaks.
- the particle size distribution curve has a clear maximum peak.
- heavy calcium carbonate having a cumulative frequency of particle size of 1.0 ⁇ m or less in the volume-based particle size distribution of 95% by volume or more and an average particle size of 0.1 ⁇ m or more and 0.28 ⁇ m or less has a particle size of
- the full width at half maximum satisfies this condition, a printed matter printed using an industrial inkjet printer can have a sufficient image quality sufficient for a product. As a result, a printed matter that can be a product can be manufactured more favorably.
- FIG. 1 shows heavy calcium carbonate in which the cumulative frequency of a particle size of 1.0 ⁇ m or less in a volume-based particle size distribution is 95% by volume or more and the average particle size is 0.1 ⁇ m or more and 0.28 ⁇ m or less, and at least 1
- the particle size distribution curve of the heavy calcium carbonate which has two peaks and the half width of a maximum peak is 0.25 micrometer or less is illustrated.
- FIG. 2 illustrates a particle size distribution curve of heavy calcium carbonate conventionally known in the coated paper field. Heavy calcium carbonate is produced by grinding natural limestone. Therefore, even if the average particle size is about the same, the particle size distribution is not the same.
- heavy calcium carbonate exhibits a particle size distribution curve that does not have a distinct peak or has a broadened peak.
- the heavy calcium carbonate according to the present invention is a fine particle having an average particle size of 0.1 ⁇ m or more and 0.28 ⁇ m and a particle size of 1.0 ⁇ m or less having a cumulative frequency of 95% by volume or more. It is distinguished from conventionally known heavy calcium carbonate in that it has a peak.
- the coating layer can contain a conventionally known pigment in addition to heavy calcium carbonate.
- conventionally known pigments include various kaolins, clays, talc, light calcium carbonate, satin white, lithopone, titanium dioxide, zinc oxide, silica, colloidal silica, alumina, aluminum hydroxide, plastic pigments and the like.
- the content of heavy calcium carbonate according to the present invention in the coating layer is 60% by mass or more in the total pigment of the coating layer. If the heavy calcium carbonate in the coating layer is less than 60% by mass in the total pigment of the coating layer, the ink is not fixed properly on the industrial ink jet printer and the ink absorption speed is insufficient. The printed matter cannot have a sufficient image quality as a product.
- the heavy calcium carbonate according to the present invention can be produced, for example, by the following method.
- a pre-dispersed slurry of heavy calcium carbonate is prepared by dispersing powder obtained by dry pulverizing natural limestone in an aqueous solution to which water or a dispersant is added.
- the pre-dispersed slurry thus prepared is further wet pulverized using a bead mill or the like.
- the natural limestone can be immediately wet pulverized.
- dry pulverization is preferably performed in advance prior to wet pulverization.
- the particle diameter of limestone is preferably 40 mm or less, and preferably the average particle diameter is 2 ⁇ m or more and 2 mm or less.
- the sizing can be performed by a commercially available sizing machine.
- an organic dispersant is preferably applied to the surface of the pulverized limestone.
- this can be performed by various methods, a method of performing wet pulverization of dry-ground limestone in the presence of an organic dispersant is preferable.
- the aqueous medium is added to limestone so that the mass ratio of limestone / aqueous medium (preferably water) is in the range of 30/70 to 85/15, preferably 60/40 to 80/20. Add the organic dispersant here.
- organic dispersants include low molecular or high molecular weight water-soluble anionic surfactants having a carboxyl group, sulfate ester salt, sulfonate salt or phosphate ester salt as a functional group, polyethylene glycol type or polyvalent An alcohol type nonionic surfactant can be mentioned.
- a polyacrylic acid-based organic dispersant having a polyacrylic acid as a water-soluble anionic surfactant as an organic dispersant is particularly preferable.
- These organic dispersants are commercially available from San Nopco, Toagosei, Kao, etc., and can be used in the present invention.
- the amount of the organic dispersant to be used is not particularly limited, but is preferably used in the range of 0.3 to 3.5 parts by mass as a solid content per 100 parts by mass of heavy calcium carbonate, 0.5 parts by mass The range of 3 parts by mass or less is more preferable.
- the obtained predispersed slurry is wet-ground by a conventionally known method.
- an aqueous medium in which an organic dispersant having an amount in the above range is dissolved in advance is mixed with limestone and wet pulverized by a conventionally known method.
- the wet pulverization may be a batch type or a continuous type, and can be performed by an apparatus such as a mill using a pulverization medium such as a sand mill, an attritor, or a ball mill.
- a pulverization medium such as a sand mill, an attritor, or a ball mill.
- the method of obtaining the heavy calcium carbonate which has the cumulative frequency and average particle diameter concerning this invention is not limited to the said method.
- the coating layer of the printing paper used for the invention preferably contains a conventionally known binder used for the coated paper. This is because the strength of the coating layer is improved when the coating layer contains a binder. As a result, a better printed matter can be produced using a conventional printing machine such as an industrial inkjet printing machine and an offset printing machine.
- binders used in the coated layer of coated paper include polyacrylic acid-based polyacrylic acid such as sodium polyacrylate and polyacrylamide, polyvinyl acetate, styrene-butadiene copolymer, ethylene-vinyl acetate, etc.
- various water-soluble synthetic compounds such as polyethyleneimine, polyamide polyamine, and epichlorohydrin, such as various copolymer latexes, polyvinyl alcohol, modified polyvinyl alcohol, formalin resins such as polyethylene oxide, urea, and melamine.
- binders examples include starch purified from natural plants, hydroxyethylated starch, oxidized starch, etherified starch, phosphate esterified starch, enzyme-modified starch, cold water soluble starch obtained by flash drying them, dextrin, Examples thereof include natural polysaccharides such as mannan, chitosan, arabinogalactan, glycogen, inulin, pectin, hyaluronic acid, carboxymethylcellulose, and hydroxyethylcellulose, or oligomers thereof, and modified products thereof.
- examples of other binders include natural proteins such as casein, gelatin, soybean protein and collagen, or modified products thereof, and synthetic polymers and oligomers such as polylactic acid and peptides.
- the binder can be used after cation modification. If an excessive amount of the binder is added to the pigment, the image may be stained in industrial inkjet printing. Therefore, the content of the binder in the coating layer is 3 with respect to 100 parts by mass of the total pigment in the coating layer.
- the mass is preferably 30 parts by mass or more and more preferably 5 parts by mass or more and 20 parts by mass or less.
- a coating layer contains a conventionally well-known printability improving agent with an offset printing machine or the like. This is because the image quality of printed matter is easily stabilized in printing by an industrial inkjet printer or offset printer.
- printability improvers used in the coated layer of coated paper include melamine-formaldehyde resins, urea-formaldehyde resins, polyamine resins, polyamide polyuric acid resins, polyamide polyurea-formaldehyde resins, polyamides.
- -Formaldehyde resins polyamide-epoxy resins, polyamide epichlorohydrin resins, gliogizar resins, zirconium carbonate, glycerin diglycidyl ether, polyglycidyl ether, ketone aldehyde resins, dialdehyde starch and the like. These can be used alone or in combination.
- it is a polyamine resin.
- the content of the printability improving agent in the coating layer is preferably 0.1 parts by mass or more and 3 parts by mass or less with respect to 100 parts by mass of the total pigment in the coating layer.
- the coating layer of the coated paper used contains various conventionally known auxiliaries as necessary in addition to the heavy calcium carbonate, the binder and the printability improver according to the present invention.
- various auxiliary agents include organic pigments, ink fixing agents, pigment dispersants, thickeners, fluidity improvers, surfactants, antifoaming agents, antifoaming agents, mold release agents, foaming agents, penetrating agents, Examples thereof include coloring dyes, coloring pigments, fluorescent brighteners, ultraviolet absorbers, antioxidants, preservatives, antibacterial agents, water resistance agents, wet paper strength enhancers, and dry paper strength enhancers.
- the coating layer of the coated paper used preferably contains an acetylene glycol derivative.
- an acetylene glycol derivative refers to a glycol having a structure having an acetylene group in the center and an alkyl substituent and a hydroxyl group on the left and right, and is described in, for example, JP-A Nos. 2002-348500 and 2003-49394. ing.
- a printed matter produced using an industrial inkjet printer or an offset printer has a better image quality sufficient as a product. This is because the ink absorption rate is increased and the coating layer strength is increased.
- the acetylene glycol derivative is a compound represented by the following general formula (1) or (2).
- R 1 , R 2 , R 3 and R 4 in the above formula (1) each represent an alkyl group having 1 to 5 carbon atoms.
- R 1 , R 2 , R 3 and R 4 preferably have a bilaterally symmetric structure around the acetylene group.
- R 5 , R 6 , R 7 and R 8 in the above formula (2) each represent an alkyl group having 1 to 5 carbon atoms.
- m and n are each an integer of 1 to 25, and m + n is 2 to 40.
- OE is an oxyethylene chain (—O—CH 2 —CH 2 —)
- OP is an oxypropylene chain (—O—CH 2 —CH [CH 3 ] —).
- OE and OP may each be a single chain or a mixed chain.
- R 5 , R 6 , R 7 and R 8 preferably have a bilaterally symmetric structure centering on the acetylene group.
- acetylene glycol derivative according to the present invention is commercially available from Nissin Chemical Industry under the name “Surfynol” or “Olfine” and from Kawaken Fine Chemicals under the name “Acetylol”.
- preferred acetylene glycol derivatives are 2,4,7,9-tetramethyl-5-decyne-4,7-diol and 2,4,7,9-tetramethyl-5-decyne-4,7- Diol ethoxylate.
- the content of the acetylene glycol derivative in the coating layer is preferably 0.05% by mass or more and 1% by mass or less with respect to the total pigment of the coating layer. This is because within this range, the ink absorption speed and coating layer strength of the coated paper can be further increased without inducing image bleeding.
- the coated paper used can be obtained by coating and drying a coating layer coating solution on a support.
- a commonly used coating apparatus can be used and is not particularly limited.
- various coating apparatuses such as various types of blade coaters such as a roll coater, air knife coater, bar coater, rod blade coater, short dwell coater and curtain coater can be used.
- a drying method a commonly used drying apparatus can be used and is not particularly limited.
- various drying apparatuses such as a hot tunnel dryer such as a straight tunnel dryer, an arch dryer, an air loop dryer, and a sine curve air float dryer, and a dryer using infrared rays, a heated dryer, and a microwave can be used.
- a hot tunnel dryer such as a straight tunnel dryer, an arch dryer, an air loop dryer, and a sine curve air float dryer
- a dryer using infrared rays, a heated dryer, and a microwave can be used.
- the coated paper used in the present invention may be provided with at least one coating layer according to the present invention.
- the coated paper preferably has a coating layer according to the present invention on both sides.
- a coating layer other than the coating layer according to the present invention can be appropriately provided on the support side or the surface layer side of the coating layer according to the present invention.
- the coated paper support used is base paper, high-quality paper, or conventional coated paper.
- Base paper is chemical pulp such as LBKP (Leaf Bleached Kraft Pulp), NBKP (Needle Bleached Kraft Pulp), GP (Groundwood Pulp), PGW (Pressure Groundwood Pulp), RMP (Refiner Mechanical Pulp), TMP (Refiner Mechanical Pulp), TMP Based on wood pulp such as CTMP (Chemi ThermoCMPMeulical Pulp), CMP (Chemi Mechanical Pulp), CGP (Chemi Groundwood Pulp) and other waste paper pulps such as DIP (De-Inked Pulp) and conventionally known fillers , Binders, sizing agents, fixing agents, yield improvers, cationizing agents, paper strength enhancers, and other additives, if necessary, and mixed to make a long paper machine, circular paper machine, twin wire It is manufactured by various devices such as a paper machine.
- the high quality paper is obtained by providing a size press or an anchor coat layer with starch, polyvinyl alcohol or the like on the base paper.
- Conventional coated paper is art paper, coated paper, cast coated paper, baryta paper, etc., in which a coating layer is further provided on the base paper or high-quality paper.
- the coated paper for printing of the present invention can be obtained by coating a coating layer coating solution on a support and then drying it.
- a commonly used coating apparatus can be used and is not particularly limited.
- various coating apparatuses such as various types of blade coaters such as a roll coater, air knife coater, bar coater, rod blade coater, short dwell coater and curtain coater can be used.
- a drying method a commonly used drying apparatus can be used and is not particularly limited.
- various drying apparatuses such as a hot tunnel dryer such as a straight tunnel dryer, an arch dryer, an air loop dryer, and a sine curve air float dryer, and a dryer using infrared rays, a heated dryer, and a microwave can be used.
- the coated paper according to the present invention can be used as it is coated and dried, but if necessary, the surface can be smoothed by a machine calendar, soft nip calendar, super calendar, multi-stage calendar, multi-nip calendar, etc. it can.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 16 times.
- the average particle size is 0.20 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.37 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 16 times.
- the average particle size is 0.20 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.19 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 24.
- the average particle size is 0.12 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.31 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 24.
- the average particle size is 0.12 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.13 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 12 times.
- the average particle size is 0.28 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.43 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 12 times.
- the average particle size is 0.28 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.25 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 14 times.
- the average particle size is 0.23 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.41 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 14 times.
- the average particle size is 0.23 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.23 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (size of horizontal type, cylindrical type crushing chamber: diameter of about 0.5 m, length of about 1.3 m). The beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 75% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 14 times.
- the average particle size is 0.23 ⁇ m
- the content of particles larger than 1.5 ⁇ m is zero
- the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 96% by volume
- half of the maximum peak The value width was 0.39 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 75% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 14 times.
- the average particle size is 0.23 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 96% by volume, half of the maximum peak
- the value width was 0.24 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 79% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 17 times.
- the average particle size is 0.19 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 98% by volume, half of the maximum peak
- the value width was 0.34 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 79% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 17 times.
- the average particle size is 0.19 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 98% by volume, half of the maximum peak
- the value width was 0.19 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 78% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 12 times.
- the average particle size is 0.25 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 97% by volume, half of the maximum peak
- the value width was 0.31 ⁇ m.
- Heavy calcium carbonate 8a was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 10 times.
- the average particle size is 0.31 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.45 ⁇ m.
- Heavy calcium carbonate 8b was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 10 times.
- the average particle size is 0.31 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.33 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 70% by volume. The flow rate was about 15 liters / minute. The number of passes was six. At this time, the average particle size is 0.50 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 80% by volume, half of the maximum peak The value width was 0.51 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant are added to this and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 34.
- the average particle size is 0.07 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.26 ⁇ m.
- Heavy calcium carbonate was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant are added to this and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 83% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 34.
- the average particle size is 0.07 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 100% by volume, half of the maximum peak
- the value width was 0.08 ⁇ m.
- Heavy calcium carbonate was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 70% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 14 times.
- the average particle size is 0.26 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 93% by volume, half of the maximum peak
- the value width was 0.42 ⁇ m.
- Heavy calcium carbonate 11b was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (size of horizontal type, cylindrical type crushing chamber: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 70% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 14 times.
- the average particle size is 0.26 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 93% by volume, half of the maximum peak
- the value width was 0.27 ⁇ m.
- Heavy calcium carbonate 12a was coarsely pulverized from natural limestone to an average particle size of about 30 ⁇ m using a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was processed using a wet pulverizer manufactured by Ashizawa Finetech Co., Ltd. (horizontal and cylindrical pulverization chamber dimensions: diameter of about 0.5 m, length of about 1.3 m).
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 75% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 10 times.
- the average particle size is 0.35 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 97% by volume, half of the maximum peak
- the value width was 0.51 ⁇ m.
- Heavy calcium carbonate 12b was sized by coarsely grinding natural limestone to an average particle size of about 30 ⁇ m with a jaw crusher, hammer crusher, or roller mill. Water and a commercially available polyacrylic acid-based dispersant were added thereto and stirred to obtain a pre-dispersed slurry having a solid content of about 75% by mass. This pre-dispersed slurry was treated using a wet crusher manufactured by Ashizawa Finetech Co., Ltd. (horizontal type, cylindrical crushing chamber dimensions: diameter of about 0.5 m, length of about 1.3 m), and then sized.
- the beads used were made of zirconia having a diameter of about 0.2 mm, and the bead filling rate was 75% by volume.
- the flow rate was about 15 liters / minute.
- the number of passes was 10 times.
- the average particle size is 0.35 ⁇ m, the content of particles larger than 1.5 ⁇ m is zero, the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 97% by volume, half of the maximum peak
- the value width was 0.38 ⁇ m.
- a commercially available product FMT-OP2A, manufactured by Pimatech
- the average particle size is 0.73 ⁇ m
- the content of particles larger than 1.5 ⁇ m is 2.7% by volume
- the cumulative frequency of heavy calcium carbonate in the particle size range of 1.0 ⁇ m or less is 68% by volume
- the full width at half maximum of the maximum peak was 0.73 ⁇ m.
- Heavy calcium carbonates 1a to 6a, 1b to 6b and 7 are heavy calcium carbonates according to the present invention.
- Heavy calcium carbonates 8a, 8b, 9, 10a to 12a, 10b to 12b and 13 are heavy calcium carbonates not falling within the scope of the present invention.
- the support was produced as follows. To a pulp slurry consisting of 100 parts by mass of LBKP having a freeness of 400 mlcsf, 10 parts by weight of light calcium carbonate as a filler, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, alkyl ketene dimer type sizing agent (size pine K903, Arakawa Chemical Industries Co., Ltd.) 1.0 part by mass was added, and paper making was carried out with a long paper machine.
- a pulp slurry consisting of 100 parts by mass of LBKP having a freeness of 400 mlcsf, 10 parts by weight of light calcium carbonate as a filler, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, alkyl ketene dimer type sizing agent (size pine K903, Arakawa Chemical Industries Co., Ltd.) 1.0 part by mass was added, and paper making was carried out with
- Oxidized starch was adhered on both sides with a size press machine at 2.5 g / m 2 , machine calendering was performed to obtain a base paper produced with a basis weight of 100 g / m 2 , and this was used as a support.
- the coating layer coating solution was prepared according to the following contents. It mix
- ⁇ Preparation of silica dispersion> In water, 4 parts by weight of a cationic polymer (dimethyldiallylammonium chloride homopolymer, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Charol DC902P, average molecular weight 9000), and precipitated silica (Nipseal VN3, manufactured by Tosoh Silica Co., Ltd., average secondary particle size 23 ⁇ m) ) 100 parts by mass were mixed, and a pre-dispersed slurry was prepared using a sawtooth blade type disperser (blade peripheral speed 30 m / sec).
- a cationic polymer dimethyldiallylammonium chloride homopolymer, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Charol DC902P, average molecular weight 9000
- precipitated silica Niipseal VN3, manufactured by Tosoh Silica Co., Ltd., average secondary particle size 23
- this pre-dispersed slurry is passed once through a bead mill (zirconia beads having a diameter of 0.3 mm, bead filling rate 82 volume%, disk peripheral speed 11 m / sec) to adjust the silica concentration, A silica dispersion having a concentration of 50% by mass was prepared.
- the average particle size is 0.2 ⁇ m
- the content of particles larger than 1.5 ⁇ m is zero
- the cumulative frequency of silica in the particle size range of 1.0 ⁇ m or less is 96% by volume
- the half width of the maximum peak is 0. .23 ⁇ m.
- the coating layer coating liquid was coated on both sides with a blade coater and dried. Thereafter, calendar treatment was performed to prepare coated papers 1 to 40 used in the printed matter manufacturing methods of Examples 1 to 28 and Comparative Examples 1 to 20.
- the coating amount was 10 g / m 2 per side as a solid content.
- a printed matter manufacturing method uses each coated paper obtained by the above-described procedure, prints with an industrial ink jet printer, or prints with an offset printer before or after printing with an industrial ink jet printer. It was set as the printed matter manufacturing method of the comparative example.
- Offset printing press printing Before or after printing with the above industrial inkjet printer, using an offset form rotary press manufactured by Miyakoshi as an offset printer, printing speed: 150 m / min, ink used: T & K TOKA UV Best Cure Black and Gold Red ( Bronze Red), UV irradiation amount: 6000 m, a predetermined evaluation image was repeatedly printed under the condition of 2 kW.
- evaluation of printed matter Sensory evaluation was performed on the image quality of the printed matter obtained as described above. Evaluation was performed with respect to the printed matter finally obtained. In offset printing, the degree of deterioration in image quality due to defective printing due to the occurrence of blanket piling. Were visually observed, and sensory evaluation was performed in the following four stages. In this invention, if it is either evaluation AA or A, it shall be a printed matter which can become a goods. AA: There is no deterioration in image quality, and the image quality is sufficient as a product. A: Degradation of image quality is slight and the image quality is sufficient as a product. B: Although the image quality is slightly lowered, the image quality is not sufficient as a product depending on the application. C: Deterioration in image quality is recognized and the image quality is not sufficient as a product.
- Table 2 shows the evaluation results of Examples 1 to 28 and Comparative Examples 1 to 20.
- Examples 1 to 28 corresponding to the method for producing a printed matter by the industrial inkjet printer of the present invention can produce a printed matter that has a sufficient image quality as a product and can be a product.
- the image quality sufficient as a product can be obtained by printing before or after printing by an industrial inkjet printer by a conventional printer other than an industrial inkjet printer such as offset printing. It turns out that the printed matter which can become a product can be manufactured.
- the particle size is 1.0 ⁇ m in the volume-based particle size distribution.
- Heavy calcium carbonate having a cumulative frequency of 95% by volume or more and an average particle size of 0.1 ⁇ m or more and 0.28 ⁇ m or less has at least one peak and half of the maximum peak in the particle size distribution curve. It can be seen that when the value width is 0.25 ⁇ m or less, a printed matter can be produced more satisfactorily.
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Description
なお、ドット拡散とは、塗工紙に着弾したインク滴同士が十分拡散して、インク滴間の隙間を埋める品質である。
本発明の第2課題は、産業用インクジェット印刷機を用いて印刷する前または後に従来からの印刷機を用いて印刷し、商品となり得る印刷物を製造する方法を提供することである。
産業用インクジェット印刷機を用いて印刷用塗工紙に印刷する工程を含み、
該産業用インクジェット印刷機の印刷速度が60m/分以上であり、
該印刷用塗工紙が支持体および塗工層を含み、該塗工層が、体積基準の粒度分布において、粒子径1.0μm以下の累積頻度が95体積%以上であり且つ平均粒子径が0.1μm以上0.28μm以下である重質炭酸カルシウムを、塗工層の総顔料中の60質量%以上含有することを特徴とする、産業用インクジェット印刷機による印刷物製造方法によって達成される。
これにより、産業用インクジェット印刷機を用いて印刷して商品となり得る印刷物を製造することができる。
これにより、グラビア印刷機、オフセット印刷機、活版印刷機、フレキソ印刷機、熱転写印刷機またはトナー印刷機など従来からの印刷機を用いて固定情報を印刷し、および産業用インクジェット印刷機を用いて可変情報を印刷して商品となり得る印刷物を製造することができる。
グラビア印刷機は、画像が彫り込まれたロール状の版胴を介してインクを被印刷体に転写する方式の印刷機である。
オフセット印刷機は、インクを一度ブランケットに移してから被印刷体に再び転移する間接印刷方式の印刷機である。
活版印刷機は、凸版に付与されたインクを被印刷体に押しつけるように圧をかけて印刷する凸版印刷方式の印刷機である。
フレキソ印刷機は、柔軟な弾性のある樹脂版を使用する凸版印刷方式である。
熱転写印刷機は、各色のインクリボンを用いる印刷機であって、熱によってインクリボンから色材を被印刷体に転写する方式の印刷機である。
トナー印刷機は、帯電ドラムに付着したトナーを、静電気を利用して被印刷体にトナーを転写させる電子写真方式の印刷機である。
本発明において、産業用インクジェット印刷機の印刷速度は、60m/分以上である。これ未満の印刷速度であっても産業用インクジェット印刷が可能であるが、本発明の効果が顕著に認められる印刷速度は60m/分以上である。印刷速度は、印刷物の生産効率を向上させるために100m/分以上が好ましく、150m/分以上がより好ましい。カット紙タイプの場合は、印刷速度は、毎分当たりの印刷される用紙サイズから算出する。
重質炭酸カルシウムは、天然の石灰石を粉砕することにより製造される。従って、平均粒子径は同程度であっても、粒度分布は同じではない。一般的には、重質炭酸カルシウムは、明確なピークを有さないかあるいは広がりをもったピークを有する粒度分布曲線を示す。本発明にかかる重質炭酸カルシウムは、平均粒子径が0.1μm以上0.28μm且つ粒子径1.0μm以下の累積頻度が95体積%以上のような微粒子であること、加えて、明確な最大ピークを有する点で従来公知の重質炭酸カルシウムと区別される。
印刷適性向上剤の塗工層中の含有量は、塗工層の総顔料100質量部に対して0.1質量部以上3質量部以下が好ましい。
塗工紙の塗工層がアセチレングリコール誘導体を含有することによって、産業用インクジェット印刷機やオフセット印刷機を用いて製造される印刷物が、商品として十分なより良好な画質を有することとなる。この理由は、インク吸収速度が高められ、また、塗層強度が高められるからである。
重質炭酸カルシウム等の粒度分布は、日機装社製粒度分布測定器Microtrac MT3300EXIIを用い、以下の測定条件で測定を行った。
溶媒 :水
粒子屈折率 :1.65
粒子形状 :非球形
測定結果から、粒子径に関する体積基準の粒度分布曲線および累積頻度曲線を作成し、測定器に付属する解析手段によって、平均粒子径、粒子径1.0μm以下の累積頻度および最大ピークの半値幅を算出した。重質炭酸カルシウムおよびシリカについては、平均粒子径、累積頻度、最大ピークの半値幅を算出し、それ以外は平均粒子径を算出した。
<重質炭酸カルシウム1aの作製>
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は16回とした。このとき、平均粒子径は0.20μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.37μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は16回とした。このとき、平均粒子径は0.20μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.19μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は24回とした。このとき、平均粒子径は0.12μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.31μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は24回とした。このとき、平均粒子径は0.12μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.13μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は12回とした。このとき、平均粒子径は0.28μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.43μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は12回とした。このとき、平均粒子径は0.28μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.25μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は14回とした。このとき、平均粒子径は0.23μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.41μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は14回とした。このとき、平均粒子径は0.23μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.23μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率75体積%とした。流量は約15リットル/分とした。パス回数は14回とした。このとき、平均粒子径は0.23μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は96体積%、最大ピークの半値幅は0.39μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率75体積%とした。流量は約15リットル/分とした。パス回数は14回とした。このとき、平均粒子径は0.23μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は96体積%、最大ピークの半値幅は0.24μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いるビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率79体積%とした。流量は約15リットル/分とした。パス回数は17回とした。このとき、平均粒子径は0.19μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は98体積%、最大ピークの半値幅は0.34μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いるビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率79体積%とした。流量は約15リットル/分とした。パス回数は17回とした。このとき、平均粒子径は0.19μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は98体積%、最大ピークの半値幅は0.19μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率78体積%とした。流量は約15リットル/分とした。パス回数は12回とした。このとき、平均粒子径は0.25μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は97体積%、最大ピークの半値幅は0.31μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は10回とした。このとき、平均粒子径は0.31μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.45μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は10回とした。このとき、平均粒子径は0.31μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.33μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率70体積%とした。流量は約15リットル/分とした。パス回数は6回とした。このとき、平均粒子径は0.50μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は80体積%、最大ピークの半値幅は0.51μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとする。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は34回とした。このとき、平均粒子径は0.07μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.26μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとする。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率83体積%とした。流量は約15リットル/分とした。パス回数は34回とした。このとき、平均粒子径は0.07μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は100体積%、最大ピークの半値幅は0.08μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率70体積%とした。流量は約15リットル/分とした。パス回数は14回とした。このとき、平均粒子径は0.26μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は93体積%、最大ピークの半値幅は0.42μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率70体積%とした。流量は約15リットル/分とした。パス回数は14回とした。このとき、平均粒子径は0.26μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は93体積%、最大ピークの半値幅は0.27μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率75体積%とした。流量は約15リットル/分とした。パス回数は10回とした。このとき、平均粒子径は0.35μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は97体積%、最大ピークの半値幅は0.51μmであった。
重質炭酸カルシウムは、天然の石灰石をジョークラッシャー、ハンマークラッシャー、ローラーミルによって平均粒子径30μm程度までに粗粉砕して、整粒した。これに水と市販のポリアクリル酸系分散剤を加えて攪拌し、固形分約75質量%の予備分散スラリーとした。この予備分散スラリーをアシザワ・ファインテック社製湿式粉砕機(横型、円柱型粉砕室の寸法:直径約0.5m、長さ約1.3m)を用いて処理し、その後、整粒した。用いたビーズは、直径約0.2mmのジルコニア製であり、ビーズの充填率75体積%とした。流量は約15リットル/分とした。パス回数は10回とした。このとき、平均粒子径は0.35μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は97体積%、最大ピークの半値幅は0.38μmであった。
重質炭酸カルシウムは、市販品(FMT-OP2A、ファイマテック社製)を使用した。このとき、平均粒子径は0.73μmであり、1.5μmより大きい粒子の含有量は2.7体積%、1.0μm以下の粒子径範囲の重質炭酸カルシウムの累積頻度は68体積%、最大ピークの半値幅は0.73μmであった。
支持体は、以下のように作製した。濾水度400mlcsfのLBKP100質量部からなるパルプスラリーに、填料として軽質炭酸カルシウム10質量部、両性澱粉0.8質量部、硫酸バンド0.8質量部、アルキルケテンダイマー型サイズ剤(サイズパインK903、荒川化学工業社製)1.0質量部を添加して、長網抄紙機で抄造した。サイズプレス装置で両面あたり酸化澱粉を2.5g/m2付着させ、マシンカレンダー処理をして坪量100g/m2として作製される原紙を得て、これを支持体とした。
軽質炭酸カルシウム(TP123、奥多摩工業社製、平均粒子径0.63μm)
カオリン(HG90、ヒューバー社製、平均粒子径0.19μm)
シリカ(下記のように調製されるシリカを使用)
アセチレングリコール1(Olfine E1010、日信化学工業社製、「化2」の構造)
アセチレングリコール2(Surfynol 104E、日信化学工業社製、「化1」の構造)
アセチレンアルコール(Olfine B、日信化学工業社製)
水に、カチオン性ポリマー(ジメチルジアリルアンモニウムクロライドホモポリマー、第一工業製薬製、シャロールDC902P、平均分子量9000)4質量部、および沈降法シリカ(ニップシールVN3、東ソーシリカ社製、平均二次粒径23μm)100質量部を混合し、のこぎり歯状ブレード型分散機(ブレード周速30m/秒)を使用して予備分散スラリーを調製した。次に、この予備分散スラリーをビーズミル(直径0.3mmのジルコニアビーズ、ビーズの充填率82体積%、円盤周速11m/秒)に1回通過させて、シリカ分濃度を調整し、シリカ固形分濃度50質量%のシリカ分散液を調製した。このとき、平均粒子径は0.2μmであり、1.5μmより大きい粒子の含有量はゼロ、1.0μm以下の粒子径範囲のシリカの累積頻度は96体積%、最大ピークの半値幅は0.23μmであった。
支持体に、塗工層塗工液をブレードコーターにて両面塗工し、乾燥させた。その後、カレンダー処理をして、実施例1~28および比較例1~20の印刷物製造方法に使用する塗工紙1~40を作製した。塗工量は固形分として片面当たり10g/m2とした。
産業用インクジェット印刷機としてコダック社製印刷機Prosper 5000XL Pressを用いて、印刷速度:75m/分,100m/分,150m/分、使用インク:水性顔料インク、各印刷速度で、6000m、所定の評価画像を印刷した。
上記の産業用インクジェット印刷機にて印刷する前または後に、オフセット印刷機としてミヤコシ社製オフセットフォーム輪転機を用いて、印刷速度:150m/分、使用インク:T&K TOKA UVベストキュア墨および金赤(Bronze Red)、UV照射量:8kW2基の条件で、6000m、所定の評価画像を繰り返し印刷した。
上記によって得られる印刷物の画質を官能評価した。評価は、最終的に得られる印刷物に対して行った。オフセット印刷においてはブランケットパイリングの発生による印刷不良に起因する画質の低下度合いを、産業用インクジェット印刷においてはインク定着性不足、インク吸収容量不足、インク吸収速度不足またはインク滴拡散不足による画質の低下度合いをそれぞれ目視によって観察し、下記の4段階で官能評価を行った。本発明において、評価AAまたはAのいずれかであれば、商品となり得る印刷物であるものとする。
AA:画質低下が無く、商品として十分な画質を有する。
A:画質低下が僅かで、商品として十分な画質を有する。
B:画質低下が僅かであるが、用途によって商品として十分な画質ではない。
C:画質低下が認められ、商品として十分な画質を有しない。
半値幅が0.25μmより大きい実施例1~11および18と半値幅が0.25μm以下である実施例12~17および19~28との対比により、体積基準の粒度分布において粒子径1.0μm以下の累積頻度が95体積%以上であり且つ平均粒子径が0.1μm以上0.28μm以下である重質炭酸カルシウムが、その粒度分布曲線において、少なくとも1つのピークを有し且つ最大ピークの半値幅が0.25μm以下であると、より良好に印刷物を製造できることが分かる。
実施例27および28と実施例12~17および実施例24~26との対比により、塗工紙の塗工層がアセチレングリコール誘導体を含有すると、より良好に印刷物を製造できることが分かる。
一方、本発明の産業用インクジェット印刷機による印刷物製造方法に相当しない比較例1~20は、商品として十分な画質を有さないために商品となり得る印刷物を製造することができない。
Claims (5)
- 産業用インクジェット印刷機を用いて印刷用塗工紙に印刷する工程を含み、
該産業用インクジェット印刷機の印刷速度が60m/分以上であり、
該印刷用塗工紙が支持体および塗工層を含み、該塗工層が、体積基準の粒度分布において、粒子径1.0μm以下の累積頻度が95体積%以上であり且つ平均粒子径が0.1μm以上0.28μm以下である重質炭酸カルシウムを、塗工層の総顔料中の60質量%以上含有することを特徴とする、産業用インクジェット印刷機による印刷物製造方法。 - 前記産業用インクジェット印刷機を用いて印刷用塗工紙に印刷する工程の前または後に、グラビア印刷機、オフセット印刷機、活版印刷機、フレキソ印刷機、熱転写印刷機およびトナー印刷機から選択される産業用インクジェット印刷機以外の印刷機を用いて印刷する工程をさらに含む、請求項1に記載の産業用インクジェット印刷機による印刷物製造方法。
- 産業用インクジェット印刷機以外の印刷機がオフセット印刷機である請求項2に記載の産業用インクジェット印刷機による印刷物製造方法。
- 前記体積基準の粒度分布において粒子径1.0μm以下の累積頻度が95体積%以上であり且つ平均粒子径が0.1μm以上0.28μm以下である重質炭酸カルシウムが、その粒度分布曲線において、少なくとも1つのピークを有し且つ最大ピークの半値幅が0.25μm以下である請求項1~3のいずれかに記載の産業用インクジェット印刷機による印刷物製造方法。
- 前記塗工層が、アセチレングリコール誘導体を含有する請求項1~4のいずれかに記載の産業用インクジェット印刷機による印刷物製造方法。
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| DE112013004979.1T DE112013004979T5 (de) | 2012-10-11 | 2013-10-08 | Verfahren zur Herstellung von Druckerzeugnissen unter Verwendung eines industriellen Tintenstrahldruckers |
| US14/434,822 US9205643B2 (en) | 2012-10-11 | 2013-10-08 | Method for manufacturing printed products using industrial inkjet printer |
| CN201380052913.1A CN104703806B (zh) | 2012-10-11 | 2013-10-08 | 利用工业用喷墨印刷机的印刷物制造方法 |
| JP2014515951A JP5707001B2 (ja) | 2012-10-11 | 2013-10-08 | 産業用インクジェット印刷機による印刷物製造方法 |
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| JP5285157B2 (ja) * | 2009-07-17 | 2013-09-11 | 三菱製紙株式会社 | 印刷用塗工紙 |
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| JP5707001B2 (ja) | 2015-04-22 |
| US20150273819A1 (en) | 2015-10-01 |
| DE112013004979T5 (de) | 2015-08-13 |
| US9205643B2 (en) | 2015-12-08 |
| CN104703806A (zh) | 2015-06-10 |
| CN104703806B (zh) | 2017-08-08 |
| JPWO2014057944A1 (ja) | 2016-09-05 |
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