WO2019118175A1 - Presse encolleuse pour pigments et couchage de surface pour papier couché et carton - Google Patents

Presse encolleuse pour pigments et couchage de surface pour papier couché et carton Download PDF

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Publication number
WO2019118175A1
WO2019118175A1 PCT/US2018/062743 US2018062743W WO2019118175A1 WO 2019118175 A1 WO2019118175 A1 WO 2019118175A1 US 2018062743 W US2018062743 W US 2018062743W WO 2019118175 A1 WO2019118175 A1 WO 2019118175A1
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WO
WIPO (PCT)
Prior art keywords
starch
size press
binder
pigment
paperboard
Prior art date
Application number
PCT/US2018/062743
Other languages
English (en)
Inventor
Michael Francis KOENING
Original Assignee
Graphic Packaging International, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Graphic Packaging International, Llc filed Critical Graphic Packaging International, Llc
Publication of WO2019118175A1 publication Critical patent/WO2019118175A1/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
    • 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
    • D21H21/14—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 function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/822—Paper comprising more than one coating superposed two superposed coatings, both being pigmented
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/08—Impregnated or coated fibreboard

Definitions

  • the present inventor has observed that in papemiaking, one normally sees a Sot of dewatering of the coating at the first coating station . This is more pronounced as the paper/ paperboard basis weight increases, as more fibers are available to absorb the water out of the coating. This can cause loss of coating binder into the sheet with the water, so that higher latex levels are required to compensate for this loss. This can also cause premature immobilization of the coating solids, which makes it difficult to control the coatweight at the blade coater.
  • the dewatering also limits the solids content of the coating that can be used. The inventor has found that it is possible to increase the solids content of the coatings used at both coating heads.
  • Increased solids content of the coatings means that less water is present for a given coatweight, so higher machine speeds ar possible if the machine speed is limited by drying capability of the paper machine.
  • Paperboard can also be rougher than a lightweight paper, especially as the thickness of the paperboard increases,
  • Synthetic surface sizing agents such as styrene acrylic emulsions (S AE), ScripSet 1M styrene maleic anhydride (SMA), or alkyl ketene dimer (AK.D) are commonly used to improve printability of the paper surface. These synthetic surface sizing agents can improve toner adhesion for electrophotographic printing, and reduce ink bleed for ink jet and flexographic printing.
  • Starch / GCC mixtures have been used al the size press to make pigmented paper for premium ink jet and laser paper. These papers are uncoated, and are not subsequently coated, but are pigmented at the size press as a replacement for coated paper
  • a size press composition for paper or paperboard comprising: binder;
  • binder and pigment are present in a binder : pigment weight ratio of about 10:1 to about 1: 10;
  • synthetic surface sizing is present in a synthetic surface sizing agen : (binder and pigment) weight ratio of about 2:100 to about 10:100.
  • Another embodiment provides a size web, for paper or paperboard, comprising:
  • the size press composition on one or both sides of the dried web.
  • Another embodiment provides a coated or imeoated paper or paperboard, comprising the sized web,
  • Another embodiment provides a paper or paperboard, comprising:
  • a sized web comprising:
  • the size press composition comprising:
  • binder and pigment are present m a hinder : pigment weight ratio of about 10:1 to about 1; 10; and
  • synthetic surface sizing is present in a synthetic surface sitting agent : (binder and pigment) weig t ratio of about 2:100 to about 10: 100.
  • Another embodiment provides an article, comprising the paper or paperboard.
  • Another embodiment provides a method, comprising contacting, on a papermaking machine; a dried web comprising cellulosic fibers; and
  • a size press composition for paper or paperboard which includes:
  • binder and pigment are present in a binder : pigment weight ratio of about 10:1 to about 1:10;
  • synthetic surface sizing is present in a synthetic surface sizing agent : (binder and pigment) weight ratio of about 2:100 to about 10: 100
  • the size press composition may be in the form of an aqueous solution, slurry, emulsion, dispersion, suspension, mixture, thixotropic composition, or colloidal composition.
  • the binder ay include one or more of natural product, casein, soy protein, faty acid salts and copolymers, water soluble polymer, water soluble starch co- binder, polyvinyl alcohol, poly acrylic acid, poly acrylic add salt, polyvinylpyrrolidone, polyethylene glycol, polyethylene oxide, polymer emulsion, acrylate, styrene acrylate, styrene butadiene, styrene acrylonitrile, polyurethane, polyvinyl acetate, polyethylene emulsion, polyethylene (PE) polymers; polyethylene terephthalate (PET) polymers; polyhydroxyalkanoate (PHA) polymers; polylactic acid (PLA) polymers; polyg!ycolie acid (PGA) polymers; polyvinyl acetate polymers; waxes; polyurethane polymers; or epoxy resins, starch, liigh-a ylose corn starch
  • the binder may include one or more natural products such as casein, soy protein, and fatty acid salts and copolymers, water soluble polymers such as polyvinyl alcohol, poly acrylic add and salts, polyvinylpyrrolidone, polyethylene glycol polyethylene oxide, etc, and polymer emulsions such as acrylates, styrene acrylates, styrene butadienes, polyurethanes, polyvinyl acetates, polyethylene (PE) polymers; polyethylene terephthalate (PET) polymers; poiyhydroxyalkanoate (PHA) polymers; polyiactic acid (PLA) polymers; polyglyeolic add (PGA) polymers; polyvinyl acetate polymers; waxes; polyurethane polymers; or epoxy resins, and their copolymers and derivatives. Any combination thereof may he suitabl used.
  • water soluble polymers such as polyvinyl alcohol, poly acrylic add and salts, polyviny
  • the binder may include a starch selected from the group including high-amylose com starch, waxy com starch, tapioca starch, cationic starch, ethylated starch, oxidized starch, com starch, potato starch, ri.ee starch, dent corn starch, waxy starch, modified starch, FiimKote 1M by Ingredion, PiimKote 370TM by Ingredion (modified starch), AquablocTM by Aquasol, Aquabloc 403TM by Aquasol (starch), Rex StarchTM b Tate and Lyle, Clear-Cole 640TM by Tate and Lyle (waxy starch), PG 270TM by Ingredion (ethylated starch), and a combination thereof.
  • a starch selected from the group including high-amylose com starch, waxy com starch, tapioca starch, cationic starch, ethy
  • the hinder may include a water-soluble polymer hinder selected from the group including starch binders, ceilulosic binders, polyvinyl alcohol binders,
  • polyacrylie add binders lie acid binders, polyvinylamine binders, polyacrylamide binders, polyether binders, sulfonated polystyrene binders, carbox l ated polystyrene binders, and a combination thereof.
  • the water-soluble polymer binder may be a starch binder.
  • the binder may include a polymer latex binder selected from the group including styrene butadiene rubber latexes, acrylic polymer latexes, polyvinyl acetate latexes, styrene acrylic copolymer latexes, polyurethane latexes, starch/acrylic copolymer latexes, starch/styrene acrylic copolymer latexes, polyvinyl alcohol (PVOH)/styrene acrylic copolymer latexes, PVQH/acrylic copolymer latexes, and a combination thereof.
  • the polymer latex hinder may he a stymne-aerylic latex binder.
  • the hinder may he ethylated starch.
  • any combination of binder may he suitably used.
  • the pigment may he selected from the group including ground calcium carbonate (GCC), precipitated calcium carbonate (PCC), clay, kaolin day, talc, mica, calcium sulfate, absorbent plastic pigment particles, calcined clay pigment particles, titanium dioxide pigment particles » barium sulfate pigment particles, silica pigment particles, zeolite pigment particles, fumed silica pigment particles, alumina pigment particles, bentonite clay pigment particles, HC (Hydrocarb) 90 iM by Omya (ground calcium carbonate), flC (Hydrocarb) 60TM by Omya (ground calcium carbonate), Hydrafine 90W 1M by KaMin (clay), and a mixture thereof.
  • GCC ground calcium carbonate
  • PCC precipitated calcium carbonate
  • clay kaolin day
  • talc mica
  • calcium sulfate absorbent plastic pigment particles
  • calcined clay pigment particles titanium dioxide pigment particles » barium sulfate pigment particles
  • silica pigment particles ze
  • the pigment may be ground calcium carbonate (GCC).
  • GCC ground calcium carbonate
  • any combination of pigment may he suitabl used
  • the pigment may he finel divided, e.g,, having a size range of from about 0,5 to about 5 microns. This range includes ail value and subranges therebetween » including about 0.5, 0-6, 07, 0.8, 09, 1, 2, 3, 4, and 5 microns.
  • the synthetic surface sizing agent generally refers to a non-starch surface sizing agent.
  • the synthetic surface sizing agent is not particularly limited and may be selected front the group including styrene maleic anhydride (SMA), alkyl ketene dimer (AKD), AKD (IP Size 2000)TM by Solents (alky! ketene dimer), Scripset 745 1M by Solenis (styrene maleic anhydride), styrene acrylic emulsion (SAE), polymer emulsions with a surface energy of 50 dynes or less after drying, and a combination thereof.
  • SMA styrene maleic anhydride
  • AKD alkyl ketene dimer
  • AKD IP Size 2000TM
  • Scripset 745 1M by Solenis
  • SAE styrene acrylic emulsion
  • the synthetic surface sizing agent may be styrene maleic anhydride (SMA).
  • the synthetic surface sizing agent may be ScripsetTM.
  • any combination of synthetic surface sizing agent may be suitably used,
  • the size press composition may further include one or more water soluble salt.
  • the water soluble salt may be one or more of a multivalent cationic metal salt, an inorganic salt, an organic salt, or a combination thereof
  • the water soluble salt may be one or more multivalent cationic metal salt, inorganic salt, organic salt, or combination thereof selected from the group including calcium chloride, calcium acetate, calcium magnesium acetate, calcium nitrate, calcium hydroxide, magnesiu chloride, magnesiu sulfate, magnesium nitrate, magnesium sulfate, aluminum chloride, aluminum nitrate, aluminum ehlorohydrate, aluminum sulfate, sodium aluminum sulfate, vanadium chloride, and a combination thereof.
  • the water soluble salt may be calcium chloride.
  • the water soluble salt may be a metal drying salt, multivalent metal drying salt, monovalent metal drying salt, or a combination thereof.
  • a metal drying salt may suitably refer to those metal salts which may improve the dry time of inks deposited or printed on printable substrates by inkjet printing processes.
  • the multivalent metal drying salt may be selected from the group including calcium chloride, calcium acetate, calcium hydroxide, calcium nitrate, calcium sulfate, calcium sulfite, magnesium chloride, magnesium acetate, magnesium nitrate, magnesium sulfate, magnesium sulfite, aluminum chloride, aluminum nitrate, aluminum sulfate, aluminu
  • the monovalent metal drying salt may be selected from the group including sodium chloride, sodium acetate, sodium carbonate, sodium bicarbonate, sodium hydroxide, sodiu silicates, sodium sulfate, sodiu sulfite, sodium nitrate, sodium bromide, potassium chloride, potassium acetate, potassium carbonate, potassium bicarbonate, potassium hydroxide, potassium silicates, potassium sulfate, potassium sulfite, potassium nitrate, potassium bromide, lithium chloride, lithium acetate, lithium carbonate lithium bicarbonate, lithium hydroxide, lithium silicates, lithium sulfate, lithium sulfite, lithium nitrate, lithium bromide,, or a combination thereof.
  • any combi ation of salt may be suitably used.
  • the water soluble salt may be present in an amount of 3 to 30 parts by weight, based on the weight of the composition. This range includes all values and subranges therebetween, including 3, 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29. and 30 parts by weight, based on the weight of the composition.
  • the water soluble salt in the size press composition, may be present in a amount of 5 to 20 parts by weight, based on the weight of the composition. This range Includes all values and subranges therebetween, including 5, 6, 7, 8, , 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 parts by weight, based on the weight of the composition.
  • the water soluble salt in the size press composition, may be present in an amount such that the metal anion of the water soluble salt has the same equivalent weight as the calcium anion based on 3 to 30 parts by weight of calcium chloride, based on the weight of the composition. This range includes all values and subranges therebetween, including
  • the size press composition may have a % solids of about 1(1 30% solids by weight. This range includes ail values and subranges therebetween, including about 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30 solids by weight, based on the weight of the composition.
  • the size press composition may have a % solid of about 20-30% solids by weight
  • % solids refers to the percentage of non-volatile, non- liquid components (by weight) that are present in the sizing, coating, composition, etc.
  • one example of the size press composition may include starch / GCC (2:1 starch: GCC ratio) with Scripset (SMA) surface sizing (5 parts Scripset : 100 parts starch/ GCC) in embodiments herein, as an example, the size press formulation may be applied with a rod-metered size press
  • one example of starch is ethylated starch
  • one example of pigment is GCC
  • one example of synthetic surface sizing agent is Scripset. SMA, and one example is applying the size press composition with a rod-metered size press.
  • the hinder and pigment are suitably present in a binder : pigment weight ratio of about 10: 1 to about 1: 10. This range includes all values and subranges therebetween, including 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1:1; 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1:2; 10, 9, 8, 7,
  • the binder and pigment may be present in a binder : pigment weight ratio of about 4; 1 to about I ; 1.
  • the synthetic surface sizing is suitably present in a synthetic surface sizing agent : (binder and pigment) weight ratio of about 2:100 to about 10:100, This range includes all values and subranges therebetween, including 2, 3, 4, 5, 6, 7. 8, 9, or 10:100.
  • the synthetic surface sizing in the size press composition, may be present in a synthetic surface sizing agent ; (binder and pigment) weight ratio of about 3:100 to about 6: 100.
  • a sized web for paper or paperboard which includes: a dried web including eelMosic fibers: and
  • the size press compositio on one or both sides of the dried weh.
  • the dried web prior to being contacted with the size press composition, the dried web is slot coated, he , the dried web has a zero or Substantially zero Surface loading of a coating or sizing present on one or both sides or surfaces of the web.
  • the size press composition is considered to be distinct from coatings such as described in US Patent No. 9.670,621.
  • the sizing may be present on one side, or on both sides of the dried web, hr embodiments herein, if present on both sides of the dried web, the sizing may be the same or different on th respective sides.
  • the sizing may include starch, pigment and Scripsei. In embodiments herein, the sizing may include binders other than starch. In embodiments herein, the sizing may include a combination of starch and non -starch binders. In embodiments herein, the binders other than starch may have greater“binding strength” than starch and hi that case may be used at lower levels than that of starch and still result in coatings that are not“dusty”.
  • the size press treatment herein can result in a smoother paperboard, and if desired, can be dried and calendered, resulting in an uncoated (but sized) paperboard with enhanced smoothness and printability.
  • the paperboar can be coated after the size press treatment, so that subsequent coatings will be smoother, and perhaps can be reduced in thickness and still achieve adequate coverage.
  • holdout for subsequent coatings can be improved so that less water and water soluble binders are absorbed into the paperboard, resulting in stronger coatings and Improved barrier properties.
  • a coated or uncoaled paper or paperboard which includes the sized web.
  • a paper or paperboard which includes:
  • a sized web which includes:
  • the size press composition including:
  • binder and pigment are present in a binder : pigment weight ratio of about 10:1 to about 1:10;
  • synthetic surface sizing is present in a synthetic surface sizing agent : (binder and pigment) weight ratio of about 2:100 to about 10: 100.
  • the paper or paperboard may be coated or uncoated
  • the paper or paperboard may include one or more coatings in contact with one or both sides of the sized web.
  • the coatings e.g., base coat, lop coat, or both, may refer to those compositions which may be applied over the sized web, and do not refer to the size press composition per se.
  • the surface sizing composition may have a lower solids content than that of the coatings, and the surface sizing composition may penetrate into the dried web somewhat, in forming one embodiment of the sized web.
  • the coatings may suitably and independently contain optional additives, such as, for example, a metal salt drying agents, cationic dye fixing agents, optical brightening agents, fluorescent whitening agents, solvents, diluents, anti-scratch and mar resistance agents, dd mers, rheology modifiers, thickeners, lubricants, dispersants, surfactants, or combination thereof.
  • optional additives such as, for example, a metal salt drying agents, cationic dye fixing agents, optical brightening agents, fluorescent whitening agents, solvents, diluents, anti-scratch and mar resistance agents, dd mers, rheology modifiers, thickeners, lubricants, dispersants, surfactants, or combination thereof.
  • the coating or coatings may independently contain Aleogum L229TM y Ke ira, (styrene acrylic thickener), Berehem 4136TM by Berceii (diglyemde lubricant), Rheocarh 121TM by Coatex, SunKote 455 1M by Oumova (calcium stearate), Accu er 9300TM by Dow (acrylic homopolymer), or a combination thereof.
  • the coating compositions may be independently formulated as an aqueous solution, an aqueous slurry, a colloidal suspension, a liquid mixture, a thixotropic mixture, etc.
  • the paper or paperboard may include one or more coatings on one or both sides of the sized web, such as CI S (coated on one side), C2S (coated on both sides), coated CIS, or coated C2S
  • the paper or paperboard may include a base coat in contact with one or both sides of the sized web.
  • the paper or paperboard may include a base coat one or both sides of the sized web, such as a CIS or C2S coating in contact with sized web,
  • the base coats may he the same or different.
  • the paper or paperboard may include a top coat in contact with the base coat on one or both sides of the sized web.
  • the paper or paperboard may include a top coat, such as a CIS or C2S coating.
  • the top coats may be the same or different .
  • a dried web refers to a fibrous web that may be formed, created, produced, etc., on a moving wire of a papemiaking machine from an aqueous mixture, furnish, etc , including at least eellulosic fibers, and then dried.
  • the web may be suitably dried to contain less than or equal to 10% by weight water. This range includes all values and subranges therebetween, including 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0.5, 0.1% by weight, or less water.
  • the dried web suitably includes a plurality of eellulosic fibers.
  • the type of eellulosic fiber is not critical, and any such fiber known or suitable for use in paper making can be used.
  • the web can made from pulp fibers derived from hardwood trees, softwood trees, or a combination of hardwood and softwood trees.
  • the fibers may be prepared for use in a papermaking furnish by one or more known or suitable digestion, refining, and/or bleaching operations such as, for example, known mechanical, tbermpmeehanical, chemical and/or semichemical pulping and/or other well known pulping processes.
  • the term, "hardwood pulps” as tnay be used herein include fibrous pulp derived from the woody substance of deciduous trees (angiosperms) such as birch, oak, beech, maple, and eucalyptus.
  • pulps include fibrous pulps deri ved from the woody substance of coniferous tree ⁇ gymnosperms) such as varieties of fir, spruce, and pine, as for example loblolly pine, slash pine, Colorado spruce, balsam fir and Douglas fi .
  • at least a portion of the pulp fibers may be provided from non-woody herbaceous plants including, but not limited to, kenaf, hemp, jute, flax, sisal, or abaca, although legal restrictions and other considerations may make the utilization of hemp and other fiber sources impractical or impossible.
  • Either bleached or unbleached pulp fiber may be utilized.
  • Recycled pulp fibers are also suitable for use.
  • the dried web may suitably contain from 1 to 99 wt.% of cdlulosie fibers based upon the total weight of the web hi one embodiment, the dried web may contain from 5 to 95 wt% of ceilulosic fibers based upon the total weight of the web. These ranges include any and all values and subranges therebetween, for example, 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50. 55, 60, 65, 70, 75, 80, 85, 90, 5 and 99 wt%.
  • the dried web may optionally contain from 1 to 100 wt% ceilulosic fibers originating from softwood species based upon the total amount of celMosic fibers in the dried web.
  • the dried web may contain 10 to 60 wt% ceilulosic fibers originating fro softwood species based upon the total amount of ceilulosic fibers in the dried web. These ranges include 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, and 100wt% and any and all ranges and subranges therein, based upon the total amount of ceilulosic fibers in the dried web.
  • the dried web may alternatively or overlappingly contain from 0.01 to 99 wt.% fibers fro softwood species, based on the total weight of the dried web.
  • the dried web may contain from 1.0 to 6()wi% fibers from softwood species based upon the total weight of the dried web. These ranges include any and all values and subranges therein.
  • the dried web may contain not more than 001, 005, 0.1, 0.2,
  • all or part of the softwood fibers may optionally originate from softwood species having a Canadian Standard Freeness (CSF) of from 300 to 750.
  • the dried web contains fibers from a softwood species having a CSF from 400 to 550. These ranges include any and all values and subranges tfrerebetweii, for example, 300, 310, 320, 330, 340. 350, 360. 370, 380. 390, 400. 410, 420.
  • the dried web may optionally contain from 1 to 100 wt% cel!ulosic fibers originating from hardwood species based upon the total amount of DC osie fibers in the dried web.
  • the dried web may contain fro 30 to 90 wt% eelkilosic fibers originating from hardwood species, based upon the total amount of cel! ulosie fibers in the dried web. These ranges include 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60,
  • the dried web may alternatively or overlapping! ⁇ ' contain from 0.01 to 99 wt% fibers from hardwood species, based upon the total weight of the dried web. In another embodiment, the dried web ma alternatively or overlappingly contain from 60 to
  • 90wt% fibers from hardwood species based upon the total weight of the dried web
  • ranges include any and all values and subranges therebetween, including not more than 0,01, 0.05, 0.1, 0.2, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 99 and 99wt , based upon the total weight of the dried web.
  • all or part of the hardwood fibers may optionally originate from hardwood species having a Canadian Standard Freeness of from 300 to 750.
  • the dried web may contain fibers from hardwood species having CSF values of from 400 to 550. These ranges include 300, 310, 20, 330, 340, 350, 360, 370, 380, 90, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, 500, 510, 520, 530, 540, 550, 560, 570, 580, 590, 600, 610, 620, 630,
  • the dried web may optionally contain less refined fibers, for example, less refined softwood fibers, less refined hardwood, or both. Combinations of less refined and more refined fibers axe possible.
  • the dried web contains fibers that arc at least 2% less refined than that of fibers used in conventional dried webs. This ranee includes all values and subranges therebetween, including at least 2, 5, 10, 15, and 20%.
  • the dried web contains both hardwood fibers and softwood fibers
  • hardwood/softwood fiber weight ratio may optionally range from 0.001 to IQG0.
  • the hardwood/softwood ratio may range from 90/10 to 30/60. These ranges include all values and subranges therebetween , including 0.00.1, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1.0.2, 0.5, 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, B0, 85, 90, 95, 100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000,
  • the softwood fibers, hardwood fibers, or both may be optionally modified by physical and/or chemical processes.
  • physical processes include, but are not limited to, electromagnetic and mechanical processes.
  • electrical processes include, but are not limited to, electrical and mechanical processes.
  • modifications include, but are not limited to, processes involving contacting the fibers with an electromagnetic energy source such as light and/or electrical current.
  • mechanical modifications include, hot are not limited to, processes involving contacting an inanimate object with the fibers.
  • inanimate objects include those with sharp and/or dull edges.
  • Such processes also involve, for example, cutting, kneading, pounding, Impaling, and the like, and combinations thereof.
  • Non-limiting examples of chemical modifications include conventional chemical fiber processes such as crosslinMng and/or precipitation of complexes thereon.
  • Other examples of suitable modifications of fibers include those found in U.S. Patent Nos 6,592,717, 0,592,712,
  • the dried web may optionally include“fines.”“Fines” fibers are typically those fibers with average lengths of not more than about 100 pm. Sources of“fines” may be found in Save All fibers, recirculated streams, reject streams, waste fiber streams, and combinations thereof, The amount of“fines” present in the dried web can be modified, for example, by tailoring the rate at which streams are added to the paper making process.
  • the average lengths of the fines are not more than about 5, 10, 15, 20, 5, 30, 35, 40, 45, 50, 55, 60, 65, 70, 7.5, 80, 85, 90, 95, and 100 pm, Including any and all ranges and subranges therein.
  • the“fines” fibers may be present in the dried web together with hardwood fibers, softwood fibers, or both hardwood and softwood fibers.
  • the dried web may optionally contain from 0.01 to 100 wt% fines, based on the total weight of the dried web, lit one embodiment, the dried web may contain from 0.01 to 50wt fines, based upon the total weight of the web.
  • These ranges include all values and subranges therebetween, including not more than 0,0.1, 0,05, 0,1, 0,2, 0,5, , 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65 70, 75, 80, 85, 90, 95 and 100wt% fines, based upon the total weight of the dried web.
  • the dried web may alternatively or overlapping! y contain from 0.01 to 100 wt% fines, base upon the total weight of the fibers in the dried web. This range includes all values and subranges therebetween, including not more than 0,01 , 0,05, 0.1 , 0,2, 0,5,
  • the paper or paperboard may have a basis weight of from about 8 pt to about 30 pt This range includes all values and subranges therebetween, including about 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24. 25, 6, 27, 28, 29, and 30 pt
  • the paper or paperboard may have a basis weight of from about 1 O pt to about 24 pt.
  • an article which includes the paper or paperboard.
  • the article may be suitable for one or more of inkjet, fiexo, gravure, or offset printing, or a combination of two or more thereof.
  • article may be selected from the group including packaging, ood service item, cup, plate, and a combination thereof.
  • the paper or paperboard is in the form of cupstockor platestock.
  • the sized web, paper or paperboard, or article may have improved barrier properties, improved water barrier properties, improved oil barrier properties, improved barrier layer for QGWR coating, improved water barrier for cop and/or platestock, improved (lower) dust properties, improved smoothness for llexo, gravure, and offset printing, or a combination thereof.
  • a method which includes contacting, on a papermaking achine:
  • contacting the dried web and the size press composition may be carried out at a size press selected from the group including rod-metered size press, puddle size press, blade-metered size press, curtain coaler size press, vertical size press, horizontal size press, metering size press, gated roll metering size press, doctor blade metering size press, and a combination thereof.
  • a size press selected from the group including rod-metered size press, puddle size press, blade-metered size press, curtain coaler size press, vertical size press, horizontal size press, metering size press, gated roll metering size press, doctor blade metering size press, and a combination thereof.
  • contacting the dried web and the size press composition may be carried out carried out at a rod-metered size press.
  • the base coat may he applied to one or both side of the sized web, to form a coated paper or paperboard.
  • the base coat formulation may include a standard pigment containing coating designed for flexo and offset printing.
  • the base coat may include 10 to 20 pints latex binder and 100 parts pigment; a barrier coating containing a higher proportion of binder, or a specialty coating containing onl latex,
  • the binder is not particularly limiting, Mon-limiting examples of the binder include RAP 8l0 iM by Trinseo (styrene acrylate), C ⁇ 31.669 SBTM latex by Trinseo (styrene butadiene), XU 31695 f M by Trinseo (styrene acrylonitrile), Po!yco 3960TM by Dow (poly vinyl acetate), Polyco 2160 IPATM by Dow (poly vinyl acetate), Bypod 1001 iM by Dow (polyethylene emulsion), Hypod 9105 IM by Dow
  • the pigment is not particularly limi ting.
  • Non-limiting examples of pigment include HC (Hydrocarb) 90TM by Omya (ground calcium carbonate), HC (Hydrocarb) 60TM by O ya (ground calcium carbonate), Hydrafiiie 90W m by KaMin (clay), and combinations thereof, in some embodiments, the pigment is HC (Hydrocarb) 60TM by Omya (ground calcium carbonate).
  • the pigment in the base coat formulation may include one or more of clay and calcium carbonate.
  • top is used merely for convenience and is not intended to imply a particular direction.
  • a top coat may be applied to the base coat on one or both skies of the sized web, to form a coated paper or paperboard.
  • the top coat formulation may include a standard pigment containing coating designed for flexo and offset printing.
  • the top coat formulation may include 10 to 20 parts latex binder and 100 parts pigment ; a barrier coating containing a higher proportion of binder; or a specialty coating containing only latex, The hinder is not particularly limiting.
  • Non-limiting examples of the binder include RAP SI 0 iM by Trinseo (styrene acrylate), XU 31669 S B fM latex by Trinseo (styrene butadiene), XTJ 31695 JM by Trinseo (styrene acrylonitrile), Polyco 3960 m by Dow (poly vinyl acetate), Polyco 21601PA m by Dow (poly vinyl acetate), Hypod 1001 1M by Dow (polyethylene emulsion), Hypod 9105 ⁇ by Dow (polyethylene emulsion), or a combination thereof.
  • the pigment is not particularly limiting.
  • Non-limiting examples of pigment include HC (Hydrocarb) 90TM by Omya (ground calcium carbonate), HC (Hydrocarb) 60 fM by Omya (ground calcium carbonate),
  • the pigment is HC (Hydrocarb) 90 iM by Omya (ground calcium carbonate), Hydrafine 90WTM by KaMin (clay), or a combination thereof.
  • the pigment in the top coat formulation may include one or more of clay and calcium carbonate,
  • one or more of drying, coating, or calendaring the sized web, or a combination of two or more thereof may be further carded out.
  • Coated paper substrates were made on the Trinseo pilot eoater in Midland, MI (Table 1).
  • the base paperboard was a 14 point uncoated cupstock having no ske press treatment.
  • Surface size compositions (as shown in Table 1 below) were applied to both sides of this uncoated cupstock at the rate of 1300 feet per minute (fpm) using a rod metered ske press and dried using an infrared (]R) dryer, followed by a forced air oven.
  • Comparative Samples S-l and S-2 had a control surface size composition applied, consisting of a 6% sol ids solution of PG-270 ethylated corn starch, which is a size press formulation that is similar to many commercial paperboards currently available.
  • Exemplary Samples S ⁇ 3 and S ⁇ 4 had a pigmented size press composition applied in accordance with an embodiment of the present invention. Subsequently, all four Samples were coated on one side of the paperboard with a base coat and then a top coat. The base coats were applied using a blade coaler in the stiff blade mode, while the top coats were applied using a blade eoater in the bent blade mode. Both coatings were dried after coating using an infrared (1R) dryer, followed by a forced air oven. The coating formulations for the base coats and the top coats are listed in Table 1.
  • R.AP830 which is a styrene-acrylic copolymer latex.
  • Hagerty Permeability is a measure of the porosity of the coated paperboard, measuring the time in seconds for a 10 cubic centimeter volume of air to pass through the sample at a fixed pressure. The higher the number, the longer time it takes the air to pass through the coate paperboard, and hence the less porous the paperboard, Parker Print Surf is a measure of the surface roughness over a small area of the sample surface. The higher the number, the rougher the sample. Samples were also tested for flexo print mottle evaluation. The higher the number, the more mottle can be detected on the printed paperboard sample. The results of these tests are listed in Table 1.
  • Samples $-1 and S-3 have the same base coat and top coat coating compositions, hot differ that Comparative .Sample S-l has a size press composition consisting of starch only, and Exemplary Sample S-3 has a size press formulation in accordance with an embodiment of the present invention.
  • the results in Table 1 show that Exemplar Sample S-3 has a higher Hagerty Permeability value than Comparative Sample S-l, which indicates that Exemplary Sample S-3 is less porous than Comparative Sample S-l.
  • Exemplary Sample S-3 also has a significantly smoother surface than Comparative Sample S-L as indicated by the lower value for Parker Print Surf, as well as the lower llexo print mottle.
  • compositions differ only in the latex: binder used.
  • Coated paper substrates were made on the Trinseo pilot coaler in Midland, MI (Table 2).
  • the base paperboard was a 14 point uncoated cupstock having no size press treatment.
  • Surface size compositions (as shown in Table 2 below) were applied to both sides of this uncoated cupstoek at the rate of 1300 feet per minute (fpm) using a rod metered size press and dried using an infrared (JR) dryer, followed by a forced air oven.
  • Comparative Samples S-5 and S ⁇ 9 had a control surface size composition applied, consisting of a 6% solids solution of PG-270 ethylated corn starch, which is a size press formulation that is similar to many commercial paperboards currently available.
  • Exemplary Samples S-6, S-7, S-S, S-10, S-1. L and S-12 had a pigmented size press composition applied in accordance with: an embodiment of the present invention:. Subsequently, all eight samples were coated on one side of the paperboard with a base coat and then a top coat. The base coats were applied using a blade coaler in the stiff blade mode, while the top coats were applied using a blade coaler In the bent blade mode. Both coatings were dried after coating using an infrared (1R) dryer, followed by a forced air oven. The coating formulations for the base coats and the top coats are listed in Table 2.
  • Hagerty Permeability is a measure of the porosity of the coated paperboard, measuring the time in seconds for a 10 cubic centimeter volume of air to pass through the sample at a fixed pressure. The higher the number, the longer time it takes the air to pass through the coated paperboard, and hence the less porous the paperboard-
  • the Hot Corn Oil test is conducted by placing a measured amount of corn oil at 60°C onto the paperboard sample. Once the paper has cooled down to room temperature, the excess corn oil is removed, and the oil- containing paperboard is left at room temperature for 24 hoars.
  • the Y- value brightness of the paperboard is then measured, and the change in Y- value brightness before and after the test is reported. The higher number, the mote corn oil was absorbed by the paperboard sample.
  • the aforementioned Hot Corn Oil test is described in more detail in the patent application W02009142739A1 in relevant part as follows: Place samples of the coated base paper (8,3 cm by 8 3 cm) with the coated side down and against a Leneta Scrub Chart Make an initial Y-value reading of the coated base paper from the middle of the sample using a spectrophotometer.
  • samples S-5 through $-8 have the same base coat an top coat coating compositions, but differ in that Comparative sample S-5 has a size press composition consisting of starch only, and Exemplary samples S-6 through S-8 have a size press formulation in accordance with an embodiment of the present invention
  • the results in Table 2 show that Exemplary samples S-6 through S-8 have a higher Hagerty Permeability value than Comparative sample S-5, which indicates that
  • Exemplary samples S-6 through S-8 are less porous than Comparative sample S-5. Exemplary Samples S-6 through S-8 also have a better oil holdout (less hot corn oil absorbed) than
  • Comparative sample S-5 This is confirmation of the lower porosity of Exemplary samples S-6 through S-8, as seen in the flagerty Permeability test. These observations also hold true for Samples S-9 through S-12, which have the same coating formulations but different size press compositions. The coating formulations between sample S-5 through S-8 and samples S-9 through S-12 differ only in the latex binder used in the base coat. All documents, patents, journal articles and other materi ls cited in the present

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Abstract

L'invention concerne une composition pour presse encolleuse pour papier ou carton, qui comprend : un liant ; un pigment ; un agent d'encollage de surface synthétique ; et de l'eau ; où le liant et le pigment sont présents dans un rapport en poids liant:pigment d'environ 10:1 à environ 1:10 ; et l'agent d'encollage de surface synthétique est présent dans un rapport en poids agent d'encollage de surface synthétique: (liant et pigment) d'environ 2:100 à environ 10:100.
PCT/US2018/062743 2017-12-11 2018-11-28 Presse encolleuse pour pigments et couchage de surface pour papier couché et carton WO2019118175A1 (fr)

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US11578462B2 (en) * 2018-04-27 2023-02-14 Westrock Mwv, Llc Anti-blocking high barrier paperboard structures
CN111851137B (zh) * 2020-07-24 2022-04-01 淄博圣泉纸业有限公司 一种低吸高效转移印花纸的制备方法
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CN113119528B (zh) * 2021-04-19 2022-08-12 福建农林大学 一种防水吸管
CN113152147A (zh) * 2021-04-22 2021-07-23 叶子包装(美国)有限公司 一种环保型吸管纸及其制备方法、纸吸管加工工艺
CN113529480A (zh) * 2021-07-15 2021-10-22 吉林中粮生化有限公司 一种用于表面施胶的谷物粉组合物
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