WO2018074604A1 - Carton blanc revêtu - Google Patents

Carton blanc revêtu Download PDF

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Publication number
WO2018074604A1
WO2018074604A1 PCT/JP2017/038076 JP2017038076W WO2018074604A1 WO 2018074604 A1 WO2018074604 A1 WO 2018074604A1 JP 2017038076 W JP2017038076 W JP 2017038076W WO 2018074604 A1 WO2018074604 A1 WO 2018074604A1
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WO
WIPO (PCT)
Prior art keywords
coating
coating layer
weight
pigment
paper
Prior art date
Application number
PCT/JP2017/038076
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English (en)
Japanese (ja)
Inventor
周平 稲田
宗信 神代
吉松　丈博
大典 大庭
和也 ▲高▼橋
Original Assignee
日本製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 日本製紙株式会社 filed Critical 日本製紙株式会社
Priority to JP2018545779A priority Critical patent/JPWO2018074604A1/ja
Publication of WO2018074604A1 publication Critical patent/WO2018074604A1/fr

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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
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/18—Paper- or board-based structures for surface covering

Definitions

  • the present invention relates to a coated white paperboard having a contour coating layer.
  • White paperboard is often used as a container for foodstuffs, pharmaceuticals, cosmetics, and the like, especially for coated whiteboard paper, there is an increasing demand for improvement in appearance and printability from the viewpoint of visualization.
  • Coated white paperboard is processed by stamping after printing, but the paper often overlaps in the post-processing process, etc., and so-called ink scuffing occurs that causes the prints to rub and contaminate the printing surface. Is a problem.
  • a method of protecting the printed surface by varnishing is generally used, but there is a problem that work efficiency deteriorates due to an increase in the number of processes. Therefore, there is a demand for measures that do not increase the work load at the printing shop.
  • Patent Documents 1 and 2 a coating layer containing a plate-like pigment having a specific average particle diameter in a proportion exceeding 65% by weight with respect to the total pigment is applied by blade coating.
  • White paperboard provided is proposed.
  • white unevenness is an example of quality required for appearance.
  • White unevenness is defined as the standard deviation of whiteness in a minute area. Even if the whiteness is high, if the white unevenness is inferior, the surface feel is poor, and the unevenness is further emphasized particularly in the halftone dot portion of the printed material, so that the value as the printed material is inferior. When the difference between the whiteness of the base paper and the whiteness of the coating layer is large, the whiteness unevenness is particularly remarkable when the coating unevenness of the coating layer is inferior.
  • the opacity of the pigment coating layer provided by the curtain coating method is set to 50% or more, and the outermost layer of the multilayer base paper and its direct A method of increasing the whiteness difference of the lower layer to more than 12% or a method of adding a black dye to the coating pigment to make the whiteness of the base paper and the whiteness of the coating layer within 6% are proposed. (Patent Documents 3 and 4).
  • an object of the present invention is to provide a coated white paperboard with reduced whiteness unevenness with reduced ink rubbing.
  • a coated white board with less white unevenness with reduced ink rubbing can be provided.
  • X to Y includes its end values, that is, X and Y.
  • X or Y means either X or Y, or both.
  • Coated white paperboard (1) base paper
  • the base paper used in the present invention is not limited as long as it is generally used in the field of coated white paperboard, but it is preferable that used paper pulp or chemical pulp is blended.
  • Used paper pulp includes high-quality paper, medium-quality paper, newspapers, leaflets, magazines, and other sorted waste paper, corrugated wastepaper, and undeinked wastepaper pulp made from unsorted wastepaper mixed with these.
  • Kraft pulp, sulfite pulp, etc. can be used as chemical pulp.
  • Pulp other than waste paper pulp or chemical pulp is not particularly limited, and mechanical pulp such as thermomechanical pulp and pressurized groundwood pulp; semi-chemical pulp such as chemical thermomechanical pulp can be used.
  • the amount of the used paper pulp is 50% by weight or more, preferably 80% by weight or more based on the total pulp.
  • the base paper is preferably a multi-layer base paper.
  • the outermost layer on the side on which the pigment is applied is referred to as the surface layer
  • the second layer from the coated surface toward the opposite side is referred to as the lower layer
  • the other layers are referred to as other layers.
  • the outermost surface is also called the back layer
  • the middle layer is also called the layer which comprises an intermediate
  • the base paper with three or more layers
  • a plurality of layers can be stacked.
  • the chemical pulp is used as the surface pulp
  • the whiteness and white unevenness are excellent, and when the used paper pulp is used, it is advantageous in terms of cost, but is not limited thereto.
  • the base paper can be uniformly coated with the contour coating layer, and therefore, the coated white paperboard with reduced whiteness unevenness Can be obtained.
  • the lower layer and the middle layer are mainly composed of waste paper pulp.
  • ⁇ Filler may be added to the base paper.
  • Such filler is not particularly limited, for example, diatomaceous earth, talc, kaolin, calcined kaolin, delaminated kaolin, heavy calcium carbonate, light calcium carbonate, magnesium carbonate, barium carbonate, titanium dioxide, zinc oxide, silicon oxide, Amorphous silica, calcium sulfite, gypsum, white carbon, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, paper sludge, inorganic fillers such as regenerated inorganic particles from deinking floss, urea-formalin resin, Organic fillers such as polystyrene resin, vinyl chloride resin, melamine resin, phenol resin, and plastic hollow particles, and fillers contained in waste paper and broke can be used alone or in combination of two or more.
  • the content of the filler in the base paper is not limited and is appropriately selected.
  • coagulation aids paper strength enhancers, tinting dyes or pigments, and sizing agents can be used in the base paper layer according to the desired quality.
  • a yield improver in order to improve the operability at the time of papermaking, a yield improver, a drainage improver, and an antifoaming agent can be used as appropriate.
  • the paper making method of the base paper is not particularly limited, and a long paper machine including a top wire, an on-top former, a gap former, a round paper machine, a paperboard machine using both a long paper machine and a round paper machine, It can be performed using a Yankee dryer machine, a hybrid type paper machine combining these, or the like, and two or more layers may be combined to form a base paper.
  • the pH during papermaking may be acidic, neutral or alkaline, but neutral or alkaline is preferred.
  • the paper making speed is not particularly limited.
  • the basis weight of the base paper is preferably 150 to 700 g / m 2 .
  • the base paper when the coated paper is produced according to the present invention, the base paper may be smoothed in advance by a soft calendar, a chilled calendar or the like before the coating process. According to the contour coating method of the present invention, even if the base paper is pre-smoothed, the fine unevenness on the surface of the base paper can be reflected in the unevenness of the pigment coating layer, and thus obtained by the present invention.
  • the coated white paperboard is a coated whiteboard paper that has less ink rub than the contact-type coating method even if the base paper is smoothed.
  • the coated white paperboard of the present invention comprises a pigment coating layer.
  • the pigment coating layer is a coating layer containing a so-called white pigment.
  • the number of the pigment coating layers is not limited and may be a single layer or two layers, three layers, or four layers. The effects of the present invention can be obtained, but in consideration of concealability, cost, etc., two layers or three layers It is preferable that there are two layers.
  • Known pigments can be used. Specifically, heavy calcium carbonate, light calcium carbonate, diatomaceous earth, talc, kaolin, calcined kaolin, delaminated kaolin, heavy calcium carbonate, light calcium carbonate, magnesium carbonate From barium carbonate, titanium dioxide, zinc oxide, silicon oxide, amorphous silica, calcium sulfite, gypsum, white carbon, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, paper sludge, deinking floss
  • Inorganic fillers such as regenerated inorganic particles, organic fillers such as urea-formalin resin, polystyrene resin, vinyl chloride resin, melamine resin, phenol resin, and plastic micro hollow particles can be used.
  • the total amount of kaolin or clay in the total amount of pigment of 100 parts by weight is preferably 25 parts by weight or less, more preferably 20 parts by weight or less, and even more preferably 15 parts by weight or less. That is, in the total amount of pigment, the total amount of kaolin or clay is preferably 25% by weight or less, more preferably 20% by weight or less, and further preferably 15% by weight or less.
  • the total amount of pigment is the total amount of pigment contained in each pigment coating layer.
  • Kaolin or clay has a high aspect ratio and is sometimes referred to as a high aspect ratio pigment. Examples of the high aspect ratio pigment include plate pigments such as talc, clay, kaolin, calcined kaolin, and delaminated kaolin.
  • the pigment coating layer containing a lot of high aspect ratio pigments may crack
  • the blend ratio of high aspect ratio pigments, especially kaolin or clay is also used to suppress cracking of the pigment coating layer.
  • it is low.
  • calcium carbonate with high whiteness is preferably used, and light calcium carbonate or heavy calcium carbonate can be used as calcium carbonate.
  • the amount of kaolin or clay is the same in the surface layer and the lower layer. It may be different or different.
  • the amount of kaolin or clay in the surface layer can be larger than that of the lower layer, for example, the proportion of kaolin or clay in the surface layer is 30% by weight or less and the proportion of kaolin or clay in the lower layer is 5% by weight or less.
  • the pigment coating layer may contain a known adhesive.
  • the adhesive those conventionally used for coated paper can be used.
  • adhesives include styrene / butadiene, styrene / acrylic, ethylene / vinyl acetate, butadiene / methyl methacrylate, vinyl acetate / butyl acrylate, and other copolymers, polyvinyl alcohol, maleic anhydride copolymer Synthetic adhesives such as coalescence and acrylic acid / methyl methacrylate copolymers; proteins such as casein, soy protein, synthetic protein; oxidized starch, positive starch, urea phosphated starch, enzyme-modified starch, hydroxyethyl ether Examples thereof include ordinary coated paper adhesives such as etherified starch such as modified starch, starches such as dextrin; cellulose derivatives such as carboxymethylcellulose, hydroxyethylcellulose, and hydroxymethylcellulose.
  • One or more types of adhesives can be appropriately selected and used,
  • the blending ratio of the pigment and the adhesive is appropriately adjusted within a range where a desired pigment coating solution can be obtained.
  • the solid content ratio is preferably 5 to 30 parts by weight, more preferably 8 to 20 parts by weight with respect to 100 parts by weight of the pigment.
  • the amount of the adhesive is less than 5 parts by weight, the coating layer strength is weakened, and paper dust is generated or the printing strength is inferior.
  • the amount of the adhesive is more than 30 parts by weight, the gap between the pigment particles in the coating layer is filled with the adhesive and the light scattering property of the coating layer is inferior. May be inferior, cost may increase, and the like.
  • a dispersant in addition to the pigment and the adhesive, if necessary, a dispersant, a viscosity improver, a water retention agent, an antifoaming agent, a water resistant agent, a fluorescent dye, Various auxiliaries blended into ordinary coated paper pigments such as colored dyes, colored pigments, surfactants, pH adjusters, cationic resins, anionic resins, ultraviolet absorbers and metal salts can be used as appropriate.
  • the total amount of the pigment coating layer is not limited, but is preferably about 10 to 35 g / m 2 per side, and more preferably about 15 to 30 g / m 2 .
  • the pigment coating layer is a contour coating layer.
  • the contour coating layer is a uniform coating layer provided so as to trace the contour of the base paper, and is a coating layer that substantially reproduces the irregularities on the surface of the base paper.
  • the contour coating layer is formed by a contour coating method coating apparatus, and can be formed by a coating device such as a curtain coating method, an air knife coating method, a spray coating method, or a contact type contour coating method. It is not limited to these.
  • the curtain coating in which the coating layer is provided by the curtain coating method will be described in detail later. When a plurality of pigment coating layers are present, all the pigment coating layers are preferably contour coating layers.
  • the coated white paperboard of the present invention is a clear coating layer comprising various adhesives and various auxiliaries used for the above-mentioned pigment coating layer between the base paper layer and the pigment coating layer. You may have. However, from the viewpoint of reflecting the unevenness of the surface of the base paper layer on the surface of the pigment coating layer, when a clear coating layer is provided, the coating amount is preferably small, specifically about 0.1 to 5 g / m 2. It is preferable that The clear coating layer need not be a contour coating layer.
  • the coated white paperboard of the present invention may have a pigment coating layer by contour coating on one side, but a clear coating layer on the other side (also referred to as “back side” for convenience).
  • a pigment coating layer may be provided.
  • the back coating layer is, as necessary, known pigments and binders, dispersants, viscosity improvers, water retention agents, antifoaming agents, water resistance agents, fluorescent dyes, colored dyes, colored pigments, surfactants, It may contain a pH adjuster, a cationic resin, an anionic resin, an ultraviolet absorber, a metal salt, and the like.
  • the clear or pigment coating layer on the back surface does not need to be contour coating, and may be provided by a known method such as blade coating.
  • the coating amount is not particularly limited, but is generally 0.1 to 5 g / m 2 in terms of solid content on one side.
  • the coated white paperboard of the present invention has appropriate smoothness reflecting irregularities at the base paper level.
  • Smoothness is an index of the degree of unevenness of the surface, depending on the surface distribution of the coating layer obtained by Oken-type smoothness, image processing using PPS roughness, KEYENCE one-shot 3D measurement microscope, etc. Although measured, it is not limited to these. If the smoothness is too high, the contact area between the papers becomes large and the ink rubbing deteriorates or the glossiness increases too much. Therefore, the ink rubbing reduction effect of the present invention and an appropriate white paper glossiness are obtained. It becomes difficult. On the other hand, if the smoothness is too low, there is a possibility that the printing surface feeling and the transportability are deteriorated.
  • the coated white paperboard of the present invention has a PPS roughness of more than 1.3 ⁇ m and not more than 3.0 ⁇ m under the condition of a clamp pressure of 2000 kPa.
  • the upper limit is preferably 2.5 ⁇ m or less, more preferably 2.3 ⁇ m or less.
  • the PPS roughness is an index representing the roughness of the surface of the coated white paperboard measured according to ISO8791.
  • the coated white paperboard having the PPS roughness in the above range reflects the unevenness of the fiber level on the surface of the base paper, thereby reducing ink rub. If the PPS roughness is 1.3 ⁇ m or less, the smoothness becomes high and ink scuffing may occur.
  • the PPS roughness is preferably more than 1.3 ⁇ m and 2.3 ⁇ m or less.
  • the PPS roughness of the base paper under the condition of 2000 kPa is 5 to 15 ⁇ m.
  • the upper limit is preferably 14 ⁇ m or less, more preferably 12 ⁇ m or less, and the lower limit is preferably 6 ⁇ m or more, more preferably 8 ⁇ m or more.
  • the coated white board of the present invention is provided with a pigment coating layer by contour coating, the unevenness of the base paper is reflected in the unevenness of the coated white board, and ink rubbing can be reduced. Therefore, when the PPS roughness of the base paper is within the above range, it is possible to obtain a coated white paperboard in which sufficient irregularities are formed on the surface of the coated white paperboard after the contour coating layer is provided, and ink rubbing is reduced. it can.
  • the D50 value of the height distribution of the coating layer surface obtained by image processing is 5 or more and 25% or less. Is preferred.
  • the D50 is also an index representing the surface roughness of the coated white paperboard, and if the D50 is within this range, ink scuffing is reduced.
  • An apparatus for obtaining the height distribution on the surface of the coating layer by image processing includes, for example, a one-shot 3D measurement microscope (trade name: VR-3100) manufactured by KEYENCE Corporation.
  • the coated white paperboard of the present invention preferably has a DAV2 value of 50 or less.
  • the DAV2 value is an index representing the feeling of haze on the coated paper surface measured using an appearance analyzer manufactured by DuPont. The lower the value, the lower the haze.
  • the DAV2 value is higher than 50, the feeling is somewhat high, and when used as a container such as a box, there may be a problem from the viewpoint of appearance.
  • the coated white paperboard of the present invention preferably has a white paper gloss of 45 to 60%.
  • the white paper glossiness of the present invention is an index of glossiness measured according to JIS-P8142.
  • the whiteness of the coated white board of the present invention is preferably 75 to 85%, and the whiteness of the base paper is preferably 60 to 75%.
  • the whiteness of the base paper is within the above range, a coated white board with excellent whiteness can be obtained.
  • Engineered white paperboard can be obtained.
  • the whiteness is measured in accordance with JIS P8148 “Paper, paperboard and pulp—Method of measuring ISO whiteness (diffuse blue light reflectance)”.
  • Basis weight of the coated white paperboard of the present invention is not particularly limited, but is preferably about 150 to 800 g / m 2 .
  • the coated white paperboard of the present invention has excellent ink rub resistance.
  • the reason for this is not limited, but the coated white paperboard of the present invention is provided with the entire pigment coating layer by contour coating, so it is different from the coating layer provided only by the contact coating method such as blade coating.
  • the unevenness on the surface of the coated white paperboard is also reflected on the surface of the coated layer. Therefore, it is considered that the contact area between the papers when the papers are stacked is small, and even if the surface is rubbed against the print part, it is difficult to scrape the print part on the surface.
  • the contour coating layer is excellent in layer uniformity, white unevenness can also be reduced.
  • the coated white paperboard of the present invention is preferably produced by providing two or more pigment coating layers on a base paper using a contour coating type coating apparatus.
  • the contour coating is a coating method in which a coating layer having a uniform film thickness along the unevenness of a base material such as a base paper is provided.
  • the contour coating method forms a coating layer that reflects the unevenness of the fiber level, so the resulting coated paper has a high level of glossiness compared to the blade coating method.
  • Features such as low Examples of the coating method of the contour coating method include curtain coating, air knife coating, spray coating, various contact type contour coating, etc., but the contour coating of the present invention may be curtain coating. preferable.
  • curtain coating is a pre-measuring method, in which a film is formed by flowing a coating liquid whose flow rate is adjusted according to the coating amount into a curtain shape, and the base paper is passed through the film.
  • This is a coating method in which a coating layer is provided on a base paper. Therefore, the unevenness on the base paper can be easily reproduced on the surface of the coating layer.
  • curtain coating is not scraped off by a blade, and the coating layer formed as a curtain film is placed on the base paper as it is, so that there are many voids in the coating layer, which is preferable in terms of light scattering and whiteness.
  • a well-known apparatus can be used for curtain coating.
  • What is known as the shape of the curtain coating apparatus is a slot type curtain coating apparatus that directly forms a curtain film by discharging the coating liquid downward from the die, and discharging the coating liquid upward from the die,
  • a slide-type curtain coating apparatus that flows while forming a coating liquid film on a slope on a die, and then forms a curtain film by free-falling after leaving the die.
  • any apparatus may be used, but it is preferable to apply multilayer coating by simultaneously forming two or more curtain films using a slot mold.
  • the coating speed is not particularly limited, and can be about 100 to 600 m / min.
  • the solid content concentration of the coating liquid is preferably 58% by weight or more, and more preferably 62% by weight or more.
  • the upper limit of the solid content concentration is not particularly limited, but is preferably 75% by weight or less and more preferably 70% by weight or less in consideration of liquid feeding properties.
  • Example 1 (Base paper 1) Using LBKP 100% by weight pulp, surface layer of 33g / m 2 basis weight, deinked waste paper pulp 80% by weight, non-deinked magazine waste paper pulp 20% by weight, basis weight 36g / m 2 surface layer, Made from 100% by weight of non-black magazine paper pulp, the 4th to 7th layers are made using the same middle and middle layer pulps with a basis weight of 44g / m 2 and combined, pressed and dried. A coated white paperboard base paper having a basis weight of 294 g / m 2 was obtained.
  • the outermost layer on the side on which the pigment is applied is referred to as the surface layer
  • the second layer from the coated surface to the opposite side is referred to as the lower layer
  • the outermost surface is referred to as the back layer
  • the other layers are referred to as the middle layer.
  • the coating liquid B was the outermost layer on one side of the base paper 1 and dried.
  • the coating liquid A layer was a pre-coating layer
  • the coating liquid B layer was a top coating layer.
  • Amount of coating is pre-coated layer weight after drying of 20 g / m 2
  • the top coating layer is 5 g / m 2
  • the basis weight of the coated white paperboard was 316.3 g / m 2.
  • the coating speed was 300 m / min, the same as the papermaking speed, since it was performed consistently with the papermaking by on-machine.
  • the coated white paperboard obtained was calendered to obtain a coated white paperboard.
  • the processing speed was 300 m / min, which was the same as the papermaking speed and the coating speed, because it was performed consistently with the papermaking and coating by on-machine.
  • Example 2 A coated white board was obtained and evaluated in the same manner as in Example 1 except that the coating liquid B was applied to one side of the base paper 1 with a slot type curtain coating apparatus.
  • the coating amount was 25 g / m 2 by weight after drying, and the basis weight of the coated white paperboard was 316.5 g / m 2 .
  • 5 parts by weight of urea phosphate starch with respect to 100 parts by weight of pigment.
  • 14.5 parts by weight of styrene / butadiene copolymer latex was added.
  • water was added to adjust the B-type viscosity at 30 ° C. and 60 rpm to 1000 mPa ⁇ s to obtain a coating liquid D having a solid content concentration of 62% by weight and a static surface tension of 30 mN / m.
  • Example 1 the base paper 1 was adjusted to have a basis weight distribution of 295 g / m 2 by adjusting the basis weight distribution of the fourth to seventh layers, and the coating liquid C was applied as a pre-coating layer by bar coating. After passing through the drying step, the coating liquid D was applied as a top coating layer by a vent blade coating method. Amount of coating is pre-coated layer weight after drying of 8 g / m 2, the top coating layer is 12 g / m 2, the basis weight of the coated white paperboard was 315.1g / m 2. A coated white paperboard was obtained in the same manner as in Example 1 except for the configuration of the coating layer.
  • Example 2 A coated white paperboard was obtained and evaluated in the same manner as in Example 1 except that the calendar process was not performed.
  • the basis weight of the coated white paperboard was 318.5g / m 2.
  • the coating liquid D was applied onto the base paper used in Comparative Example 1 by a vent blade coating method to form a pre-coating layer.
  • the coating liquids A and B were simultaneously applied to the coating liquid B by a slot type curtain coating apparatus so that the coating liquid B was the outermost layer, and dried.
  • Amount of coating is pre-coated layer is 10 g / m 2 by weight of the dry basis weight of the intermediate coating layer 10 g / m 2
  • the top coating layer is 5 g / m 2 coated white paperboard 317 0.9 g / m 2 .
  • the coated white paperboard thus prepared was evaluated as follows. The results are shown in Table 1.
  • Basis weight Measured according to JIS P 8124.
  • Paper thickness Measured according to JIS P 8118.
  • Density Determined from basis weight and paper thickness according to JIS P 8118.
  • Oken smoothness measured according to JIS P 8155.
  • PPS roughness PPS surface roughness measured according to ISO8791. Measured with soft backing.
  • Glossiness of blank paper measured based on JIS-P8142.
  • Whiteness Measured according to JIS P8148.
  • Ink rubbing Ink density of solid part at a printing speed of 8000 sheets / hr using offset sheet-fed ink (NEX-M manufactured by Toyo Ink) with an offset sheet-fed printing machine (4 colors) manufactured by Roland After printing so that the ink becomes 1.80, the humidity is adjusted for 24 hours according to JIS P8111, and a load of 500 gf is applied by the Gakushin type friction fastness tester so that the black solid printing part fits the blank paper part.
  • the ink which rubbed once and transferred to the white paper portion was visually evaluated as ink rubbing.
  • DAV2 The appearance feeling of the coated paper was evaluated using an appearance analyzer manufactured by DuPont. The larger the value is, the more slightly the surface of the coated paper is, and the lower the blank paper feel. (10) Print surface feeling Evaluated visually.
  • the coated white paperboard of the present invention has excellent ink rub resistance.

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Abstract

L'invention concerne un carton blanc revêtu qui comprend un papier de base et au moins deux couches de revêtement de pigment, ladite couche de revêtement de pigment étant une couche de revêtement de contour, et la rugosité de surface d'impression Parker (PPS) dans la condition d'une pression de serrage de 200 kPa est supérieure à 1,3 µm et inférieure ou égale à 3,0 µm. Le carton blanc revêtu présente une friction d'encre réduite et une faible irrégularité de blanc.
PCT/JP2017/038076 2016-10-20 2017-10-20 Carton blanc revêtu WO2018074604A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018545779A JPWO2018074604A1 (ja) 2016-10-20 2017-10-20 塗工白板紙

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JP2016206050 2016-10-20
JP2016-206050 2016-10-20

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Publication Number Publication Date
WO2018074604A1 true WO2018074604A1 (fr) 2018-04-26

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PCT/JP2017/038076 WO2018074604A1 (fr) 2016-10-20 2017-10-20 Carton blanc revêtu

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015074860A (ja) * 2013-10-11 2015-04-20 王子ホールディングス株式会社 塗工白板紙の製造方法
JP2015193949A (ja) * 2014-03-31 2015-11-05 日本製紙株式会社 塗工白板紙
JP2015196907A (ja) * 2014-03-31 2015-11-09 日本製紙株式会社 塗工白板紙
JP2016060974A (ja) * 2014-09-16 2016-04-25 王子ホールディングス株式会社 塗工白板紙

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015074860A (ja) * 2013-10-11 2015-04-20 王子ホールディングス株式会社 塗工白板紙の製造方法
JP2015193949A (ja) * 2014-03-31 2015-11-05 日本製紙株式会社 塗工白板紙
JP2015196907A (ja) * 2014-03-31 2015-11-09 日本製紙株式会社 塗工白板紙
JP2016060974A (ja) * 2014-09-16 2016-04-25 王子ホールディングス株式会社 塗工白板紙

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