EP2843130A1 - Verfahren und Anordnung zur Auftragung einer Substanzschicht auf eine laufende Faserstoffbahn durch Schaumauftragung - Google Patents

Verfahren und Anordnung zur Auftragung einer Substanzschicht auf eine laufende Faserstoffbahn durch Schaumauftragung Download PDF

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Publication number
EP2843130A1
EP2843130A1 EP13181689.4A EP13181689A EP2843130A1 EP 2843130 A1 EP2843130 A1 EP 2843130A1 EP 13181689 A EP13181689 A EP 13181689A EP 2843130 A1 EP2843130 A1 EP 2843130A1
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EP
European Patent Office
Prior art keywords
fiber web
foam
substance
barrier
application
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.)
Withdrawn
Application number
EP13181689.4A
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English (en)
French (fr)
Inventor
Reijo PIETIKÄINEN
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Valmet Technologies Oy
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Valmet Technologies Oy
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Filing date
Publication date
Application filed by Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to EP13181689.4A priority Critical patent/EP2843130A1/de
Publication of EP2843130A1 publication Critical patent/EP2843130A1/de
Withdrawn legal-status Critical Current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
    • D21H19/00—Coated paper; Coating material
    • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
    • D21H19/70—Coatings characterised by a special visual effect, e.g. patterned, textured with internal voids, e.g. bubble coatings
    • 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
    • D21H21/56—Foam
    • 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
    • D21H23/30—Pretreatment of the paper
    • 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
    • D21H23/50—Spraying or projecting

Definitions

  • the invention relates to a method and to an arrangement for applying a substance layer onto a running fiber web by foam application. More especially the invention relates to a method according to the preamble of claim 1 and to an arrangement according to the preamble of claim 10.
  • fiber web making processes typically comprise an assembly formed by a number of apparatuses arranged consecutively in the process line.
  • a typical production and treatment line comprises a head box, a wire section and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise other devices and sections for finishing the fiber web, for example, a sizer, a calender, and a coating section.
  • the production and treatment line also comprises at least one winder for forming customer rolls as well as a roll packaging apparatus.
  • fiber webs are meant for example paper and board webs.
  • various substances are added onto the fiber web in order to achieve the desired end-use properties of the fiber web.
  • the strength and absorption properties of fiber webs can be improved by using surface sizing by applying sizing agents, such as starch or other glue chemicals, onto the web at the dry end of the web production line.
  • sizing agents such as starch or other glue chemicals
  • a mixture of pigment and binder, usually starch is applied onto the web usually as a single layer.
  • one or more layers of coating color i.e. mixture of pigments, binders and other additives is added on the top of the web surface.
  • the main purpose of the coating treatment is to improve the appearance and printability of the web by providing a smooth, flat and opaque surface.
  • barrier coating a relatively closed and sealed surface layer is produced, that reduces or prevents in particular the migration of fluids through the coated surface layer.
  • a coating device - In the coating of a fiber web typically a coating device - a coater - is used and in surface sizing a sizer is used.
  • different kinds of application technologies for application of the substance on the fiber web are employed, for example curtain coating technology or blade coating technology or film transfer technology or spray technology.
  • the different application technologies and methods have different operating characteristics and operation windows. In particular, different application methods set different requirements both for the physical properties and application amounts of the applied substance.
  • Surface sizing is typically performed using water based binder dispersions at 5 -15 % consistency. While in the pond sizing the consistency is rather low, about 5 %, in the film transfer and in the spray sizing the consistency is about 10-15 %. Extremely high consistencies 20-25% can be used when modified binding agents are used. Typical sizing amounts are 1- 4 g/m 2 depending on the desired strength increase and penetration depth. When the target is just to prevent web from dusting and linting, very small size amounts, about 0.5 g/m 2 , can be used.
  • a pigmenting mixture usually about 50% of pigment and 50% of binder, such as starch, is applied to the web using a size press.
  • the solids content is about 20-40% and applied amount is about 2- 4 g/m 2 .
  • a coating color i.e. water based dispersion containing pigments, binders and additives, is applied to the web. Consistency of coating color is typically 45 - 75%, depending of the used coating method. Coating can be performed in one or several sequential phases, producing one or several coating layers, each layer being typically 5-15 g/m 2 and the total coating weight being about 5-40 g/m 2 .It is clear, that substantial amount of water is transferred to the fiber web and drier units must be utilized after the coating stations.
  • the application amount can be metered in number of ways.
  • the metering is done by controlling by the blade angle and blade load.
  • a clear limitation is that the blade can be loaded up to the certain limit only, after which the coat weight cannot be reduced further by increasing the blade load.
  • the minimum coat weight is in the blade coating is about 6 g/m 2 when reasonably high consistencies are used.
  • the minimum coat weight is limited to about 4 g/m 2 when using soft nip rolls and reasonably high consistencies to achieve reasonable cd- and md -profiles.
  • Other limitations and restrictions of the film transfer coating are fogging and orange peel effect in the coating layer.
  • Spray coating is a contactless coating method, where the coating color is sprayed to the web typically at about 55-60% consistency using high pressure (about 100 bar) nozzles. Coating color must have low viscosity (50-100 mPas). Since the consistency is somewhat lower than with other coating methods, more drying capacity is needed.
  • the coat weight can be well controlled well above the coat weight 2 g/m 2 to achieve reasonable spreading of the sprayed liquid, in the other words, reasonable cd- and md-profiles.
  • curtain coating a continuous stream of falling coating color film or curtain is extruded to the fiber web from narrow nozzle slot. Since the process is based on gravity, the process is restricted to be one-sided in the upper side position. Curtain coating is particularly used for special papers, like thermal paper. In the typical curtain coating applications the used consistency is about 50-70 % and coat weight 5-30 g/m 2 . Severe restriction in curtain coating results from maintaining strong and continuous curtain film, which requires about 0.1 l/s per meter volumetric flow from the slit nozzle. This requirement prevents from applying small coat weights at slow speeds and at reasonable consistencies.
  • the minimum achieved coat weight is about 20 g/m 2 ; in order to reach coat weight 5 g/m 2 one needs to dilute the consistency down to 20%, which means relatively much more water applied to the web.
  • FBB folding box board
  • WLC white line cup
  • boundary layer air trapping between the applied coating layer and fiber web. This is the case particularly in applications with small coat weights, light coating substance and high speeds. From the prior art, it is known to remove boundary layer air by various methods, like suction and vacuum devices, blowing devices, rolls, scraping by doctoring blades and even applying lighter density gas like steam that aims to displace the boundary air layer.
  • Barrier coated fiber web products typically have one or more layers with barrier function such as water barrier, water vapor barrier, grease/oil/solvent barrier, gas and aroma barrier. These barrier layers are aimed against the penetration of gases (odor, aroma, oxygen, nitrogen, carbon dioxide, water vapor etc.), against the penetration of liquids and solvents either polar (f. ex. water) or non-polar (f. ex. grease, oil), against the penetration of solids and contamination of particles (nano-particles, dust, fumes, dirt etc.) and of germs, bacteria, fungi etc., and against the penetration of radiation (electromagnetic, f. ex.
  • barrier coatings in fiber products refer to the use of extremely thin and tight layers of polymers on the base board.
  • a barrier product may have one or more barrier layers with one or more different barrier functions. The most important requirements to the barrier coatings are: evenness of coating layer, free of pinholes and low coat weights (2-5 g/m 2 , but even up to 10-15 g/m 2 with PE extrusion).
  • Barrier coatings are usually produced by extrusion coating process using as coating substance polymers like polyethylene (PE), polypropylene (PP), polyethylene terephthalate) PET or polyolefins.
  • coating substance polymers like polyethylene (PE), polypropylene (PP), polyethylene terephthalate) PET or polyolefins.
  • PE polyethylene
  • PP polypropylene
  • PET polyethylene terephthalate
  • One disadvantage of extrusion coating is that it is a separate off-line process.
  • barrier coating layers Another common production method for barrier coating layers is laminating.
  • juice or beverage containers have a laminated aluminum foil, which provides good barrier properties.
  • the aluminum foil can be protected for example against corrosive or dissolving effect by coating it with a foil of for example polyethylene (PE).
  • PE polyethylene
  • Barrier coating can also be produced using common coating methods in an on-line or in an off-line process using above mentioned barrier polymers as water dispersions, but the limitation in common coating methods is the poor control of small coating amounts, as above is described in connection with curtain coating. Often it is desired to add on the barrier layer a wear-resistant surface layer, which is logistically easy in an on-line process.
  • the disadvantage of the commonly used barrier coating polymers is that the polymers, like PE, PP, PET, are oil-based and thus not biodegradable or recyclable. This problem has been recently tried to solve by using natural based biopolymers.
  • barrier coated products are food and liquid packages and wrappings.
  • barrier coatings are one of the most expensive coating substances, there is a need to reduce coat weight without compromising the barrier properties.
  • reduction in coat weight leads easily uneven coating, poor coverage and appearance of pinholes, which are unacceptable in barrier coatings.
  • the best starting point for material saving barrier coating is a flat and smooth surface, preferably a calendered and precoated surface. Nevertheless, there is need for economical, environment-friendly and compact on-line coating method being able to apply also small coat weights precisely.
  • a foam coating system comprises typically a mixing device, a pumping device, a foaming device, a piping system and an application unit.
  • the foaming is based on powerful mixing for adding air into the liquid-based substance with a surfactant additive, resulting substantial increase in the specific volume and thus making the handling and application of the coating substance much easier at small dry coat weights.
  • the application device comprises an application head with a slot nozzle for extruding the foam onto the web. Very shortly after the application, the foamy structure disintegrates, absorbs and spreads into the surface structure of the web, leaving a contour-like coat layer.
  • the foam phase is utilized merely as a temporary carrier phase for the coated substance. Since the foam contains large volumetric fraction gas, typically air, the density of the foam is typically low, being typically in the range 50-500 kg/m 3 . Since usually so called dry foam is used, of which typically about 85-95 % of the volume is air, the water amount is low.
  • the foaming concepts known in practice operate at the speeds below 500 m/min, in critical applications even below 250 m/min; apply substance only on one side of the web that is supported on a support roll during the application; use small substance amounts of about 1 - 2 g/m 2 dry substance.
  • DE patent application publication 19941194 is disclosed a method for coating a moving web of paper or cardboard with substance, which is applied as a foam and retains its foam structure in the finished coating and which has a covering layer of non-foamed substance.
  • the substance is foamed mechanically or chemically.
  • the foam has up to 80 % gas and the solid content of the foamed substance is 5 - 70 weight-percent.
  • the substance contains a stabilizing agent such as a tenside or stearate.
  • the substance is glue and/or starch and/or a dispersion of pigments and/or offset coating inks and/or gravure coating inks.
  • the application onto the moving web is done directly or indirectly for example by a transfer roll.
  • the fiber web production lines and their substance application devices typically operate in high running speeds of the fiber web.
  • Very high basis weight board making lines like heavy carrier board lines, operate at 300-600 m/min
  • medium basis weight board lines like FBB, , LPB (liquid packaging board) and WLC board lines operate at 500-800 m/min
  • lower weight board making lines, line liner and fluting lines operate at 800-1300 m/min.
  • Paper and tissue making lines operate typically up to 2000 m/min speeds.
  • the production is limited by the dryer capacity.
  • As a fiber web is running at high speed it creates a boundary layer air flow, which is a layer of air carried along with the running web. The boundary layer air flow disturbs the application of the substance in most coating methods, but particularly in the foam coating since the foam substance is lightweight and therefore easily affected by the aero-dynamical forces.
  • An object of the invention is to provide a method and arrangement for applying a substance layer onto a running fiber web, in particular onto a paper or a board web, advantageously producing a barrier coated web, using foam application, in which the disadvantages of prior art are eliminated or at least minimized.
  • a particular object of the invention is to provide a method and arrangement for applying a substance layer onto a running fiber web, in particular onto a paper or a board web, using foam application, in which the disadvantages and problems of the boundary layer air are eliminated and which is applicable in running at higher speeds, the speeds being typically over 250 m/min.
  • Another object is to provide a method and arrangement for applying a substance layer onto a fiber web, in which the substance is applied in form of foam, and in which the final applied substance material layer evenness and material layer weight can be controlled precisely and in which the method is applicable with small applied dry solid substance amounts.
  • Another object is to provide a method and arrangement for applying a substance layer onto a fiber web, in which the substance is applied in form of foam, and in which the applied substance can be applied at high speeds, preferably in an on-line process.
  • Another object to provide a method and arrangement for applying one or more coating layer onto a fiber web, in which the coating substance is applied in form of foam and in which the coating substance forms at least one barrier layer.
  • One particular object is to provide a method and arrangement for applying at least one barrier coating layer onto a fiber web, particularly fiber webs used in packaging, which the barrier layer is aimed to prevent contamination of the packaged product from the migration of impurities contained in the fiber web, for example dirt, mineral oils, and similar and to prevent the contamination of food stuff from impurities contained in recycled fiber, like OCC (old corrugated containers) or deinked pulp, contained in boards, like WLC (white lined chip) boards.
  • OCC old corrugated containers
  • WLC white lined chip
  • Another object is to provide a method and arrangement for applying at least one coating layer onto a fiber web, in which coating layer can have functional properties, like specialty papers, such as thermal paper, carbonless papers, safety papers etc., or in which particularly thin application of expensive coating is desired, such as in chemical treatment, or in lacquering of fiber webs.
  • coating layer can have functional properties, like specialty papers, such as thermal paper, carbonless papers, safety papers etc., or in which particularly thin application of expensive coating is desired, such as in chemical treatment, or in lacquering of fiber webs.
  • a boundary layer air flow removing means are used in order to achieve undisturbed application of the substance.
  • the boundary layer air flow removing means is a mechanical device, like doctor blade or a roll or an air doctor and/or a corresponding means known as such for removing boundary layer air flow carried along a running fiber web, for example suction means or steam application means.
  • the fiber web running speed is at least 250 m/min.
  • At least one layer of the substance in form of foam is applied onto the fiber web one-sidedly or two-sidedly.
  • more than one layer of the substance in form of foam is applied at least on one side of the fiber web.
  • more than one consecutively located application devices or at least one device with a multilayer nozzle are/is used and before at least one application device, advantageously before the first application device in the running direction of the fiber web, a boundary layer air flow removal means is located.
  • boundary air removal means are located before each application device.
  • the substance is applied two-sidedly simultaneously and symmetrically.
  • total substance application amount per nozzle or applicator unit is 0.1 - 10 g/m 2 , more advantageously 0.5 - 5 g/m 2 .
  • the density of the foam is 50-500 kg/m 3 .
  • a support surface is used on the other side of the fiber web.
  • the support surface may be advantageously a roll or a cylinder or a sliding surface.
  • the support surface may also be a belt or a wire or a moving support surface or a non-moving surface.
  • the substance is applied in the finishing section of the fiber web production line as an on-line process, where the web dryness is over 70%.
  • the applied substance is foam formed from liquid-based composition forming a barrier coating, preferably applied in on-line fiber web making process.
  • the substance is applied onto a fiber web comprising recycled fiber to form a barrier layer, in particular to form a barrier layer for preventing for example residues of printing color mineral oils, or other impurities contained in the recycled fiber to contact the product inside a package produced from recycled fiber containing paper or board.
  • the from liquid-based composition foam formed applied substance can be used as pigment coating color, sizing or binding agent such as starch or latex or other natural or synthetic polymers providing a film layer.
  • the from liquid-based composition foam formed applied substance can be used as chemical additive, substance containing chemicals or particles having functional properties such as friction reducing agents, electrically conductive material, ink capsules, indicator elements, optical brighteners, UV-dyes, safety paper indicator etc.
  • the from liquid-based composition foam formed applied substance can be used for coating at least one layer in a thermal paper.
  • the from liquid-based composition foam formed applied substance can be used for coating at least one layer in a specialty paper, for example to provide a dense, thin surface layer.
  • suction means are used to improve the transfer and the absorption of the substance onto the fiber web.
  • the suction means are for example a suction roll, a suction box.
  • the substance is heated to temperatures 20 - 90°C before, simultaneously or directly after the application of the foam substance in order to lower the surface tension, to improve the foaming properties of the substance and to improve the transfer and the absorption of the foam substance into the fiber web.
  • the fiber web is at an elevated temperature, at about 40 - 100 °C when the foam substance is applied onto the fiber web. In particular, this improves the foam adsorption by lowering the surface tension of the substance.
  • the thermal energy stored in the fiber web can be utilized in the drying of the water contained in the foam substance.
  • the fiber web is moisturized before the application of the substance to improve the transfer and the absorption of the substance onto the fiber web.
  • the substance is advantageously coating color or sizing agent, more advantageously a substance providing a barrier layer comprising PVA( polyvinyl acetate) or PVOH (polyvinyl alcohol) and advantageously nano- or micro-fibrillated cellulose. More advantageously, the barrier coating is formed from materials allowing re-cycling, re-pulping or being environmentally friendly biodegradable materials.
  • the substance may also comprise fibrous material with short or long fibers, fiber originated fine fraction (nano-pulp, NFC (nano-fibrillated cellulose), MFC (micro-fibrillated cellulose), wood fiber), mineral based pigment or filler or solids, glue- and adhesion substances (starch, latex), solvent, water, synthetic or natural polymers (starch, PVA, PVOH, PE), chemicals and/or polymers providing a film layer, substance for providing a fiber structure layer.
  • fiber originated fine fraction fiber originated fine fraction
  • NFC fiber originated fine fraction
  • MFC micro-fibrillated cellulose
  • wood fiber wood fiber
  • mineral based pigment or filler or solids mineral based pigment or filler or solids
  • glue- and adhesion substances starch, latex
  • solvent water
  • synthetic or natural polymers starch, PVA, PVOH, PE
  • chemicals and/or polymers providing a film layer, substance for providing a fiber structure layer.
  • the invention is utilized in production of a fiber web comprising at least one barrier layer, advantageously as the outermost or next outermost surface of the fiber web, which barrier layer provides an impermeable layer for fiber webs to be used for packages of foodstuffs, medicines etc.
  • the invention is utilized in production of a fiber web for package material, the fiber web comprising at least one barrier layer formed by foam coating and the fiber web consisting at least partially of recycled fiber, like OCC (old corrugated containers) or deinked pulp, the fiber web being for example WLC-board, the aim of the barrier being preventing contamination and contact of the packaged product with the impurities contained in the recycled fibers.
  • the barrier layer may also be in between of two fiber layers or under a protecting outer layer.
  • the barrier layer may also be for example an oxygen barrier layer or water barrier layer or oil barrier layer or grease barrier layer.
  • the method and the arrangement according to the invention may also be utilized in connection of applying a coating color layer of a fiber web for printing products or in connection of sizing on top of a fiber web and in connection of providing a film, a membrane or a lacquer layer for example in converting products.
  • figure 1 is a schematical example of one sided foam application of a fiber web according to an advantageous example of the invention
  • in figure 2 is a schematical example of two sided foam application of a fiber web according to an advantageous example of the invention
  • figure 3 is a schematical example of two sided foam application of a fiber web according to another advantageous example of the invention
  • in figure 4 is a schematical example of multilayer foam application of a fiber web according to an advantageous example of the invention.
  • the fiber web W is running in direction S and substance in form of foam is applied directly onto one side of the fiber web W by foam application unit 12 comprising at least one nozzle.
  • foam application unit 12 comprising at least one nozzle.
  • the fiber web W runs supported on a roll 10.
  • a substance layer C is applied onto the fiber web W.
  • a boundary layer air flow removal means 14 is located on the same side of the fiber web W as the foam application unit 12 for removing the boundary layer air flow.
  • the fiber web W is running in direction S and substance in form of foam is applied directly onto both sides of the fiber web W by foam application units 12 located on both sides of the fiber web, each application unit comprising at least one nozzle simultaneously and symmetrically.
  • foam application units 12 located on both sides of the fiber web, each application unit comprising at least one nozzle simultaneously and symmetrically.
  • the fiber web W floats between the substance foam layers C applied onto both sides of the fiber web W.
  • boundary layer air flow removal means 14 are located on both sides of the fiber web W for removing the boundary layer air flow.
  • the fiber web W is directed to run over a roll 10.
  • the fiber web W is running in direction S and substance in form of foam is applied indirectly onto both sides of the fiber web W by rolls 10 onto surfaces of which the substance is applied by the foam application units 12 comprising at least one nozzle to provide substance layers C on both sides of the fiber web.
  • boundary layer air flow removal means 14 are located on both sides of the fiber web W for removing the boundary layer air flow.
  • the substance is mixed in a mixing device 20 and pumped by a pumping device 22 to a foaming device 23 and then to the application devices 12 via regulator valves 24.
  • the fiber web W is running in direction S and substance is applied directly onto both sides of the fiber web W by the foam application units 12 comprising at least one nozzle to provide substance layers C on both sides of the fiber web W.
  • One side of the fiber web W in the figure the top side, is coated by two layers C of substance and thus two successive foam application units are provided.
  • boundary layer air flow removal means 14 are located on both sides of the fiber web W at least before the first foam application units 12 in the running direction S of the fiber web W for removing the boundary layer air flow.

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EP13181689.4A 2013-08-26 2013-08-26 Verfahren und Anordnung zur Auftragung einer Substanzschicht auf eine laufende Faserstoffbahn durch Schaumauftragung Withdrawn EP2843130A1 (de)

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EP13181689.4A EP2843130A1 (de) 2013-08-26 2013-08-26 Verfahren und Anordnung zur Auftragung einer Substanzschicht auf eine laufende Faserstoffbahn durch Schaumauftragung

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EP13181689.4A EP2843130A1 (de) 2013-08-26 2013-08-26 Verfahren und Anordnung zur Auftragung einer Substanzschicht auf eine laufende Faserstoffbahn durch Schaumauftragung

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018011667A1 (en) * 2016-07-11 2018-01-18 Stora Enso Oyj Process for creating a foam utilizing an antimicrobial starch within a process for manufacturing a paper or board product
DE102017130071A1 (de) * 2017-12-15 2019-06-19 Voith Patent Gmbh Bahnbehandlung
US10519606B2 (en) 2016-12-22 2019-12-31 Kimberly-Clark Wordlwide, Inc. Process and system for reorienting fibers in a foam forming process
CN111041892A (zh) * 2018-10-15 2020-04-21 维美德技术有限公司 多层片纤维幅材的施胶方法及多层片纤维幅材的成形部
CN112695419A (zh) * 2019-10-23 2021-04-23 奥特发德国科技有限公司 屏蔽装置，屏蔽方法和纤维网铺设器
US11255051B2 (en) 2017-11-29 2022-02-22 Kimberly-Clark Worldwide, Inc. Fibrous sheet with improved properties
US11313061B2 (en) 2018-07-25 2022-04-26 Kimberly-Clark Worldwide, Inc. Process for making three-dimensional foam-laid nonwovens
WO2022180307A1 (en) * 2021-02-23 2022-09-01 Metsä Board Oyj A method, a paperboard product and use of a foam coater and a subsequent high-consistency metering size press
US11591755B2 (en) 2015-11-03 2023-02-28 Kimberly-Clark Worldwide, Inc. Paper tissue with high bulk and low lint
EP4153813A4 (de) * 2020-05-20 2024-05-22 Stora Enso Oyj Verfahren zur herstellung eines schaumbeschichteten cellulosebasierten substrats

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013036A1 (en) * 1995-10-05 1997-04-10 Valmet Corporation Method and apparatus for coating a moving paper or cardboard web
DE19941194A1 (de) 1999-08-30 2001-03-01 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Beschichten einer Materialbahn, insbesondere aus Papier oder Karton; Auftragsmedium zum Beschichten einer Materialbahn, insbesondere aus Papier oder Karton
WO2001016427A1 (en) * 1999-09-01 2001-03-08 Metso Paper, Inc. Curtain coater and method for curtain coating
WO2002016689A2 (en) * 2000-08-24 2002-02-28 Kimberly-Clark Worldwide, Inc. Method of applying a foam composition onto a tissue
EP1283299A2 (de) * 2001-08-07 2003-02-12 Johns Manville International, Inc. Verfahren zur Herstellung einer schaumbeschichteten Matte, und beschichtete Matteprodukte
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