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WO2019213242A1 - Carton, compositions de carton et leurs procédés de production - Google Patents

Carton, compositions de carton et leurs procédés de production Download PDF

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Publication number
WO2019213242A1
WO2019213242A1 PCT/US2019/030181 US2019030181W WO2019213242A1 WO 2019213242 A1 WO2019213242 A1 WO 2019213242A1 US 2019030181 W US2019030181 W US 2019030181W WO 2019213242 A1 WO2019213242 A1 WO 2019213242A1
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WO
WIPO (PCT)
Prior art keywords
paperboard
starch
composition
swollen starch
swollen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2019/030181
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English (en)
Inventor
Guy Robert DELFRANCO
Thomas Ott
Ari-Pekka Juhani LAAKSO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Specialty Minerals Michigan Inc
Original Assignee
Specialty Minerals Michigan Inc
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 Specialty Minerals Michigan Inc filed Critical Specialty Minerals Michigan Inc
Publication of WO2019213242A1 publication Critical patent/WO2019213242A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • D21H21/22—Agents rendering paper porous, absorbent or bulky
    • 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
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • 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
    • D21H27/30—Multi-ply

Definitions

  • the disclosure generally relates to paperboard and paperboard compositions including swollen starch, and methods of making and using same.
  • a paperboard can include one or more primary layers and one or more secondary layers.
  • Each primary layer includes a network of fibers having a plurality of gelatinized swollen starch granules interdispersed between the fibers.
  • the one or more primary layers have a higher bulk than a primary layer including a network of fibers without the plurality of gelatinized swollen starch granules.
  • the paperboard is substantially free of added filler.
  • a paperboard composition can include a network of fiber material and a plurality of gelatinized swollen starch granules interdispersed among the network of fibers, wherein the paperboard composition (a) is substantially free of added filler, (b) has a mean grammage of at least 150 g/m 2 ; and (c) has a volumetric bulk that is at least 0.5% higher than a volumetric bulk of a paperboard composition free of gelatinized swollen starch granules.
  • a paperboard can include a plurality of layers. In embodiments, each of the plurality of layers can include a paperboard composition described herein.
  • a method of making a paperboard composition can include admixing a starch material with an aqueous solution under conditions sufficient to swell the starch, thereby forming a swollen starch solution comprising a plurality of swollen starch granules having an average diameter of about 30 pm to about 150 pm;
  • swollen starch solution with a paperboard furnish including a fiber matrix under conditions sufficient to disperse the plurality of swollen starch granules within the fiber matrix thereby forming a swollen starch furnish mixture, wherein the swollen starch furnish mixture is substantially free of filler; feeding the swollen starch furnish mixture into a headbox for spreading into a mat; and, drying the mat to provide a paperboard composition having a volumetric bulk, wherein upon drying, the swollen starch granules gelatinize and the volumetric bulk of the paperboard composition is increased relative to a volumetric bulk of a paperboard composition having no gelatinized swollen starch.
  • Figure 1 is a graph showing the board bulk as a function of swollen starch content for uncalendered and calendered 184-200 gsm unfilled paperboard.
  • the paperboard compositions are substantially free of added filler.
  • fillers are added to paperboard compositions to increase opacity, brightness, feel, and print definition of the paperboard.
  • addition of filler to the sheet results in cost savings due to the replacement of the fiber by filler.
  • PCC precipitated calcium carbonate
  • filled paper is much easier to dry than paper with no filler and, as a result, the paper-machine can run faster with less steam consumption, which reduces costs and improves productivity. Therefore, the addition of high levels of PCC to the sheet would drastically reduce the cost of fine paper manufacture.
  • the addition of fillers can compromise the wet and dry strength of the paperboard, and do not improve the bulk ot the paperboard. The amount of tiller added during the paperboard making process typically represents the best compromise between improving optical properties, print performance, drainage and manufacturing cost on one hand, while still maintaining strength properties and machine runnability on the other.
  • the term“paperboard composition” refers to the combination of components, as described herein, that come together to form at least one layer of a paperboard.
  • the term“paperboard” refers to the final, dried and processed paperboard product that can include one or more layers, wherein each layer can be prepared from a paperboard composition that is the same or different than the paperboard composition disclosed herein.
  • a paperboard can include a number of layers where any one or more of those layers are prepared from the paperboard composition described herein.
  • a paperboard can further include a coating layer.
  • a“paperboard” can refer to a paper product having a basis weight of at least about 150 g/m 2 .
  • the disclosure provides a paperboard composition.
  • the paperboard composition includes a network of fiber material and a plurality of gelatinized swollen starch granules interdispersed among the network of fibers.
  • the fiber material is present in the composition in an amount ranging from about 70 wt% to about 99 wt%, about 75 wt% to about 95 wt%, or about 80 wt% to about 90 wt%, for example, about 70, 71 , 72, 73, 74, 75, 76, 77, 78, 79, 80, 81 , 82, 83, 84, 85, 86, 87, 88, 89, 90, 91 , 92, 93, 94, or 95 wt%.
  • the paperboard composition is substantially free of added filler.
  • compositions described herein suitably contain less than 5 wt%, 2 wt%, 1 wt%, 0.5 wt%, 0.1 wt%, or 0.01 wt% and/or up to 0.1 wt%, 0.5 wt%, 1 wt%, 2 wt%, or 5 wt% of added filler.
  • added filler refers to an intentionally and/or purposely added filler material, such as, an inorganic particulate mineral.
  • fillers examples include, for example, ground calcium carbonate (GCC), chalk, precipitated calcium carbonate (PCC), talc, precipitated calcium sulphate (PCS), clay, titanium dioxide, and blends thereof.
  • GCC ground calcium carbonate
  • PCC precipitated calcium carbonate
  • PCS precipitated calcium sulphate
  • the fiber materials used herein may include filler contaminants.
  • the term“filler contaminant” refers to any filler material that is present in the composition as a result of the source and/or selection of the fiber material.
  • some fiber materials, such as recycled fibers may include low levels of filler materials, which would generally be considered as present in trace amounts of amounts similar to those of a contaminant.
  • the composition includes a filler contaminant
  • said filler contaminant is present in an amount no greater than about 3 wt%, 2 wt%, 1 wt%, 0.5 wt%, 0.1 wt% or 0.01 wt%, based on the total weight of the composition.
  • the paperboard and/or paperboard composition has a mean grammage (or basis weight) of at least 150 g/m 2 .
  • the paperboard and/or paperboard composition has a mean grammage ranging from about 150 g/m 2 to about 500 g/m 2 , about 180 g/m 2 to about 450 g/m 2 , about 200 g/m 2 to about 400 g/m 2 , or about 250 g/m 2 , to about 350 g/m 2 , for example about 150, 175, 180, 190, 200, 210, 225, 250, 275,
  • the paperboard and/or paperboard composition has a volumetric bulk that is at least 0.5% higher than a bulk of a paperboard composition free of swollen starch granules.
  • the volumetric bulk is up to about 5% higher than the volumetric bulk of a paperboard composition free of swollen starch granules.
  • the volumetric bulk of the paperboard composition is about 0.5% to about 5%, about 1 % to about 4%, about 1% to about 3%, or about 1.5% to about 2.5%, for example about 0.5, 0.6, 0.7, 0.8, 0.9.
  • the paperboard composition consists essentially of a network of fiber materials and a plurality of gelatinized swollen starch granules, and optionally includes one or more of cooked wet-end starch, sizing agent, optical brightening agent, retention aid, fixative, biocide, alum, or dispersant.
  • the paperboard composition consists of the network of fiber materials and the plurality of gelatinized swollen starch granules, and optionally includes one or more of cooked wet-end starch, sizing agent, optical brightening agent, retention aid, fixative, biocide, alum, or dispersant.
  • the disclosure further provides a paperboard.
  • the paperboard includes a plurality of layers.
  • each layer of the plurality of layers includes a paperboard composition as described herein.
  • the paperboard includes one or more primary layers.
  • Each primary layer can include a network of fibers and a plurality of gelatinized swollen starch granules interdispersed between the fibers.
  • the primary layer includes no added filler.
  • the primary layer consists of a network of fibers having a plurality of gelatinized swollen starch granules interdispersed between the fibers.
  • the primary layer has a higher bulk than a primary layer having a network of fibers without the plurality of gelatinized swollen starch granules.
  • the primary layer can have a bulk that is about 0.5% to about 5%, about 1% to about 4%, about 1% to about 3%, or about 1.5% to about 2.5%, for example about 0.5, 0.6, 0.7, 0.8,
  • the paperboard further includes one or more secondary layers.
  • each secondary layer can include a network of fibers, a plurality of gelatinized swollen starch granules, cooked wet-end starch, a sizing agent, an optical brightening agent, a retention aid, a fixative, a biocide, an alum, a dispersant, or any combination thereof.
  • Each of the secondary layers can have a composition that is the same as or different from the paperboard composition described herein. For example, in some cases, at least one secondary layer is free of gelatinized swollen starch granules.
  • “free of gelatinized swollen starch granules” means that no swollen starch granules are intentionally or purposely added to the secondary layer.
  • “free of gelatinized swollen starch granules” can mean that the secondary layer suitably contains less than 5 wt%, 2 wt%, 1 wt%, 0.5 wt%, 0.1 wt%, or 0.01 wt% and/or up to 0.1 wt%, 0.5 wt%, 1 wt%, 2 wt%, or 5 wt% of gelatinized swollen starch granules, based on the total weight of the secondary layer.
  • at least one secondary layer has the same composition as the one or more primary layers, as described above.
  • the number of layers in the paperboard is not particularly limited, and will depend on the application and use of the resulting paperboard.
  • the paperboard of the disclosure can include at least 1 , 3, 5, 7, 9 and/or up to 2, 4, 6, 8, or 10 layers, inclusive of primary, secondary, and coating layers.
  • the paperboard includes between 2 and 6 secondary layers.
  • the paperboard includes one or more coating layers.
  • the coating layer can include one or more of a clay, calcium carbonate, titanium dioxide, a plastic pigment, latex, a starch, polyvinyl alcohol, carboxymethylcellulose, a rheology modifier, an optical brightening agent, a dye, or a dispersant.
  • the paperboard is substantially free of added filler.
  • the paperboard includes a plurality of layers wherein any one or more of the layers is formed from a paperboard composition in accordance with embodiments of the disclosure and is substantially free of added filler. For example, in embodiments, each of the plurality of layers is substantially free of added filler.
  • the paperboard can further include one or more layers, such as a coating layer.
  • the one or more additional layers can include filler as is commonly known.
  • a colorant layer can have up to about 15 wt%, or up to about 20 wt% filler, based on the total weight of the layer.
  • This filler can include bleached chemical pulp, which can help provide opacity to the layer, thereby hiding the darker layers underneath which can include unbleached pulp.
  • the starch material can originate from corn, waxy corn or maize, potato, wheat, tapioca, sago, sorghum, waxy sorghum, manioc, tapioca, barley, rice, or combinations thereof. Any known commercially available starches can be used.
  • the starch material is cationic, anionic, amphoteric, or non-ionic.
  • the average particular size of the raw starch granules can range from about 5 pm to about 45 pm.
  • a "swollen" starch refers to starch in which raw starch granules have absorbed water and have expanded. In embodiments, the swelling is performed to a state in which no further water can be absorbed without rupturing the swollen granules.
  • Any known methods of swelling starch can be used herein, which can include controlled conditions of temperature, slurry pH, consistency, mixing, and time. These parameters can differ from starch type to starch type and are conventionally determined empirically for each type of starch.
  • the swelling can include suspending raw starch in cold water and then heating the suspension until the starch is swollen.
  • the raw starch material selection can be used to tailor the ultimate particle size or diameter of the swollen starch material.
  • the average diameter of the swollen starch granules can be from about 25 pm to about 150 pm, about 30 pm to about 150 pm, about 40 pm to about 125 pm, about 50 pm to about 100 pm, or about 75 pm to about 85 pm, for example, about 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 1 10, 1 15, 120, 125, 130, 135, 140, 145 or 150 pm.
  • swollen starches suitable for use in compositions described herein include, but are not limited to, those disclosed in U.S. Pat. Nos. 7,074,845; 7,625,962; and 8,354,004, each of which is incorporated by reference in its entirety herein.
  • Swollen starch granules are distinct from cooked starch. Cooked starch results when swollen starch granules rupture at temperatures above the gel temperature and thereby release amylose and amylopectin, which dissolve in the aqueous medium.
  • Each variety of starch has its own gel temperature. The gel temperature for many starches is available in extant literature or it can be readily empirically determined by heating a given starch suspension while monitoring viscosity.
  • swelling of starch granules is carefully controlled so as to form a swollen starch in which a minimal amount of swollen granule rupture has taken place.
  • the swollen starch of the disclosure is substantially free of cooked starch.
  • substantially free of cooked starch means that the swollen starch suitably contains less than 20 wt%, 15 wt%, 10 wt%, 5 wt%, 2 wt%, 1 wt%, 0.5 wt%, 0.1 wt%, or 0.01 wt% and/or up to 0.1 wt%, 0.5 wt%, 1 wt%, 2 wt%, 5 wt% 10 wt%, 15 wt%, or 20 wt% of cooked starch.
  • the act of swelling starch granules typically follows a distribution curve, in which some of the starch granules remain unswollen, some of the starch granules become cooked or gelatinized starch, and the majority of the starch granules becomes swollen.
  • the term“substantially free of cooked starch” means that the amount of swollen starch is represented by the span from D10-D90, D20-D80, D30-D70, or D40-D60 of the distribution curve.
  • the distribution of unswollen starch, swollen starch, and cooked starch depends on the source of the starch (e.g., corn, potato, etc.), as well as the starch manufacturing processes.
  • gelatinized swollen starch granules refers to swollen starch granules that have gelled, for example, as a result of the drying process in the paperboard making process. Without intending to be bound by theory, it is believed that the swollen starch granules gel at some point in the paperboard manufacturing process, for example, in whole or in part at the drying stage. While reference is made herein to a gelatinized swollen starch granule, it should be understood that once gelled, the granular form of the swollen starch is not maintained as the granules burst when gelling.
  • the term is used to reference the origin of the gelatinized starch as being the swollen starch granule.
  • the gelatinized swollen starch granules remain distinct from cooked wet-end starch, as they are incorporated into the paperboard process as the swollen starch granule and later gelatinize due to processing conditions after the paperboard composition, or layers or sheets formed therefrom, is prepared.
  • the swollen starch remains in swollen starch granule form up to formation of the paperboard composition as a mat and gelatinizes in the drying stage.
  • the swollen starch prior to drying, when in the swollen starch granule phase, the swollen starch imparts the bulking effect, acting at least in part as spacers to spread the fibers and increase bulk.
  • This bulking effect has advantageously been found to remain even after gelatinization of the swollen starch granules, for example, during drying.
  • the paperboard and paperboard compositions described herein include a fiber material.
  • the source of fiber material is not particularly limited.
  • suitable fiber materials for use in the compositions provided herein include, but are not limited to, bleached or unbleached kraft pulp, bleached or unbleached sulphite pulp, recycled fibers, or refined cellulose fiber obtained from a chemical or mechanical pulping process.
  • the fiber materials of the disclosure can form a web or matrix.
  • the web or matrix includes a plurality of individual fibers that can entangle and intertwine to form a network of fiber material.
  • the paperboard and paperboard compositions herein may additionally include one or more conventional paperboard additives such as, without limitation, sizing agents, wet and dry strength agents, retention aids, cooked wet-end starch, optical brightening agents, fixatives, biocides, alum, and dispersants.
  • conventional paperboard additives such as, without limitation, sizing agents, wet and dry strength agents, retention aids, cooked wet-end starch, optical brightening agents, fixatives, biocides, alum, and dispersants.
  • Suitable sizing agents include, but are not limited to alkylketene dimer, alkenyl succinic anhydride and rosin.
  • Suitable wet and dry strength agents include, but are not limited to carboxymethyl cellulose, guar gum, cationic starch, anionic acrylamide copolymers, and any derivative of the foregoing.
  • retention aids include, but are not limited to colloidal silicic acid, bentonite, anionic polyacrylamide, cationic polyacrylamide, and cationic starch.
  • the compositions can include a retention aid which can be a single chemical system (e.g. a cationic polyacrylamide), a dual chemical system (e.g. colloidal silica and a cationic polyacrylamide), or a three component system (e.g. colloidal silica, a cationic
  • suitable cooked-wet end starch include those as described for the starch material, above.
  • the cooked-wet end starch includes those starch materials that result when swollen starch granules rupture at temperatures above the gel temperature and thereby release amylose and amylopectin, which dissolve in the aqueous medium.
  • optical brightening agents include, but are not limited to, tetrasulfonated and hexasulfonated diaminostilbene sulfonate derivatives.
  • fixatives include, but are not limited to, alum,
  • PEI polyethyleneimine
  • PEAm polyamines
  • poly-DADMAC poly-DADMAC
  • biocides include, but are not limited to, thiazoles,
  • thiocyanates isothiazolins, cyanobutane, dithiocarbamate, thione, and bromo-compounds.
  • Suitable alum compounds include, but are not limited to aluminum sulfate, potassium alum, sodium alum, and ammonium alum.
  • Suitable dispersants include, but are not limited to, polyacrylates.
  • the disclosure provides methods of making paperboard and/or paperboard compositions.
  • swollen starch can be prepared by admixing a starch material, as provided herein, with an aqueous solution under conditions sufficient to swell the starch, thereby forming a swollen starch solution.
  • the swollen starch solution contains a plurality of swollen starch granules. Other parameters, such as temperature, for preparing the swollen starch are described above.
  • the starch material is admixed with the aqueous solution at a temperature ranging from about 50 °C to about 95 °C, about 60 °C to about 85 °C, or about 65 °C to about 80 °C, for example about 50, 52, 55, 57, 60, 62, 65, 68, 70, 72, 75, 77, 80, 82, 85, 87, 90, 92 or 95 °C.
  • Other temperatures are also contemplated herein, as suitable temperatures can differ for various starch raw materials and can be determined empirically as known in the art.
  • the method further includes admixing the swollen starch solution with a paperboard furnish including a fiber matrix under conditions sufficient to disperse the plurality of swollen starch granules within the fiber matrix thereby forming a swollen starch furnish mixture.
  • the swollen starch furnish mixture is substantially free of filler.
  • the fiber matrix in the paperboard furnish can be selected as provided above.
  • the fiber matrix includes bleached or unbleached kraft pulp, bleached or unbleached sulphite pulp, recycled fibers, or refined cellulose fiber obtained from a chemical or mechanical pulping process.
  • the paperboard furnish consists essentially of the fiber matrix.
  • the swollen starch furnish mixture has a solids content in an amount ranging from about 2 wt% to about 5 wt%, about 2 wt% to about 4 wt%, about 3 wt% to about 5 wt%, or about 3 wt% to about 4 wt%, for example about 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, or 5.0 wt%, based on the total weight of the swollen starch furnish mixture.
  • the method further includes feeding the swollen starch furnish into a headbox for spreading into a mat, and drying the mat to provide a paperboard composition having a volumetric bulk.
  • the swollen starch granules are gelatinized in whole or in part at the drying stage resulting in gelatinized swollen starch.
  • the volumetric bulk of the paperboard composition is increased relative to a volumetric bulk of a paperboard
  • drying can occur at a temperature ranging from about 70 °C to about 150 °C, about 75 °C to about 125 °C, or about 95 °C to about 1 10 °C, for example about 70, 75, 80, 85, 90, 95, 100, 105, 1 10, 1 15, 120, 125, 130, 135, 140, 145, or 150 °C.
  • the method can include diluting the swollen starch furnish mixture with water prior to feeding into the headbox.
  • a diluted swollen starch furnish mixture can include a solids content no greater than about 1.5 wt%, for example at least about 0.1 , 0.5, 0.8, 1.0, or 1 .2 wt% and/or up to about 0.5, 0.8, 1 .0, 1.2 or 1.5 wt%, based on the total weight of the diluted swollen starch furnish mixture.
  • the method can include calendering the paperboard composition.
  • the process of calendering is well understood within the art, and generally involves the use of heat and pressure to provide a smoothed and/or thinned paperboard.
  • the relative increase in volumetric bulk of the paperboard is substantially maintained after calendering.
  • the term“substantially maintained’ means that the volumetric bulk of the paperboard decreases no greater than about 20%, about 15% or about 10% after calendering.
  • the term“substantially maintained” means that the decrease in volumetric bulk after calendering the paperboard described herein is relatively consistent with the decrease in volumetric bulk typically observed in the calendering process with a paperboard having no swollen starch.
  • the volumetric bulk of the disclosed paperboard after calendering is greater than the volumetric bulk of a calendered paperboard composition having no swollen starch.
  • a cationic industrial corn starch, Sta-Lok® 310 was swelled in water and added to a board furnish at either 0.2 or 0.5% addition rate (kg/ton of board). Swelling temperatures were either 68 or 77 °C. Hardwood pulp refined to 23 SR (550 CSF) was used. Internal Alkylketene Dimer (AKD) sizing agent was added at 0.5% (as kg per ton) along with 0.2% cooked starch. Nalco 625 Anionic Poly-Acrylamide (APAM) retention aid was added at 0.05%.
  • a cationic industrial corn starch Sta-Lok® 310 was swelled in water and added to a board furnish at either 0.2 or 0.5% addition rate (kg/ton of board). Swelling temperatures were either 68 or 77 °C. Hardwood pulp refined to 23 SR (550 CSF) was used. Internal Alkylketene Dimer (AKD) sizing agent was added at 0.5% (as kg per to
  • Handsheets were formed at nominal basis weights between 184 and 200 gsm (grams per square meter), representative of paperboard.
  • the handsheets were made using a dynamic sheet former (DSF) followed by dynamic sheet pressing and drying at 120°C. Prior to paper testing the paper sheets were calendered under the same conditions and then conditioned at 50% relative humidity (RH) and 22°C. Calendering was done on lab hard nip calender at 200 psig. Calendering was done in 2 passes by passing the sheet through the stack, flipping it and passing it through a second time. Uncalendered and calendered sheet bulk data are shown in Figure 1 and Tables 1 -3, below.
  • the uncalendered paperboard compositions having 2 kg/ton swollen starch had an increase in bulk ranging from 0.7 % to about 2.0% as compared to uncalendered paperboard having no swollen starch.
  • the calendered paperboard e.g., Sample G
  • Table 3 shows that the uncalendered paperboard compositions having 5 kg/ton swollen starch had an increase in bulk ranging from 2.7% to about 6.1 % as compared to uncalendered paperboard having no swollen starch.
  • the calendered paperboard similarly had increased bulk relative to the calendered paperboard having no swollen starch, showing an increase in bulk ranging from 1 .6% to 4.7%.
  • any words of approximation such as and without limitation,“about,”“essentially,”“substantially,” and the like mean that the element so modified need not be exactly what is described but can vary from the description. The extent to which the description may vary will depend on how great a change can be instituted and have one of ordinary skill in the art recognize the modified version as still having the properties, characteristics and capabilities of the unmodified word or phrase.
  • a numerical value herein that is modified by a word of approximation may vary from the stated value by ⁇ 15% in some embodiments, by ⁇ 10% in some embodiments, by ⁇ 5% in some embodiments, or in some embodiments, may be within the 95% confidence interval.
  • any ranges presented are inclusive of the end-points.
  • “a temperature between 10 °C and 30 °C” or“a temperature from 10 °C to 30 °C” includes 10 °C and 30 °C, as well as any temperature in between.
  • various aspects of this invention may be presented in a range format. The description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention. Accordingly, the description of a range should be considered to have specifically disclosed all the possible subranges as well as individual numerical values within that range.
  • a description of a range such as from 1 to 6 should be considered to have specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual numbers within that range, for example, 1 , 2, 3, 4, 5, and 6.
  • a description of a range such as from 1 to 6 should be considered to have specifically disclosed subranges 1.5 to 5.5, etc., and individual values such as 3.25, etc. that is non integer individual values and ranges beginning with, ending with or both beginning with and ending with a non-integer value. This applies regardless of the breadth of the range.
  • a range may be expressed as from“about” one particular value and/or to“about” another particular value. When such a range is expressed, another embodiment is included, the embodiment being from one particular value and/or to the other particular value. Similarly when values are expressed as approximations by use of the antecedent“about,” it will be understood that the particular value forms another embodiment. As a non-limiting example, if“from about 1 to about 4” is disclosed, another embodiment is “from 1 to 4,” even if not expressly disclosed. Likewise, if one embodiment disclosed is a temperature of“about 30 °C,” then another embodiment is“30 °C,” even if not expressly disclosed.
  • any combination of followed by a list joined by the conjunction“and,” means any combination of two or more members of the group where the group members are the members of the list joined by the conjunction“and.”
  • “any combination of A, B, C, and D” encompasses the following
  • phrase“A, B, C, D, or any combination thereof” encompasses an individual member (A, B, C, D) or any combination of A, B, C, and D as outlined above.
  • particle is a piece of matter held together by physical bonding of molecules, an agglomeration of pieces of matter (“particles”) held together by colloidal forces and/or surface forces, a piece of matter which is held together by chemical bonds such as a cross-linked polymer network, a piece of matter formed by ionic interactions, or a piece of matter held together by any combination of agglomeration, surface forces, colloidal forces, ionic interactions, and chemical bonds.
  • a particle will be defined as ranging in size from less than a one tenth of a nanometer to several millimeters in size.
  • compositions, processes, or apparatus can also comprise, consist essentially of, or consist of, any combination of the recited components or materials, unless described otherwise. Combinations of components are contemplated to include

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  • Paper (AREA)

Abstract

L'invention concerne des cartons et des compositions de carton ayant un matériau à base d'amidon gonflé et un matériau fibreux, ainsi que des procédés de fabrication de ceux-ci.
PCT/US2019/030181 2018-05-01 2019-05-01 Carton, compositions de carton et leurs procédés de production Ceased WO2019213242A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862665118P 2018-05-01 2018-05-01
US62/665,118 2018-05-01

Publications (1)

Publication Number Publication Date
WO2019213242A1 true WO2019213242A1 (fr) 2019-11-07

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PCT/US2019/030181 Ceased WO2019213242A1 (fr) 2018-05-01 2019-05-01 Carton, compositions de carton et leurs procédés de production

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WO (1) WO2019213242A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115538211A (zh) * 2021-06-29 2022-12-30 精工爱普生株式会社 成形体的制造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105052A (en) * 1931-10-08 1938-01-11 Oltmans Johan Process for manufacturing paper
AU2006201187A1 (en) * 2002-04-09 2006-04-13 Fpinnovations Swollen starch compositions for use in papermaking
US7074845B2 (en) 2002-04-09 2006-07-11 Pulp And Paper Research Institute Of Canada Swollen starch-latex compositions for use in papermaking
US20150197890A1 (en) * 2012-10-05 2015-07-16 Specialty Minerals (Michigan) Inc. Filler suspension and its use in the manufacture of paper

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2105052A (en) * 1931-10-08 1938-01-11 Oltmans Johan Process for manufacturing paper
AU2006201187A1 (en) * 2002-04-09 2006-04-13 Fpinnovations Swollen starch compositions for use in papermaking
US7074845B2 (en) 2002-04-09 2006-07-11 Pulp And Paper Research Institute Of Canada Swollen starch-latex compositions for use in papermaking
US7625962B2 (en) 2002-04-09 2009-12-01 FI Fpinnovations Swollen starch-latex compositions for use in papermaking
US8354004B2 (en) 2002-04-09 2013-01-15 Fpinnovations Unruptured, ionic, swollen starch for use in papermaking
US20150197890A1 (en) * 2012-10-05 2015-07-16 Specialty Minerals (Michigan) Inc. Filler suspension and its use in the manufacture of paper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115538211A (zh) * 2021-06-29 2022-12-30 精工爱普生株式会社 成形体的制造方法

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