EP3164542A1 - Procédé de production de carton pour liquide, dispositif de production de carton pour liquide et carton pour liquide selon ce procédé - Google Patents

Procédé de production de carton pour liquide, dispositif de production de carton pour liquide et carton pour liquide selon ce procédé

Info

Publication number
EP3164542A1
EP3164542A1 EP15728463.9A EP15728463A EP3164542A1 EP 3164542 A1 EP3164542 A1 EP 3164542A1 EP 15728463 A EP15728463 A EP 15728463A EP 3164542 A1 EP3164542 A1 EP 3164542A1
Authority
EP
European Patent Office
Prior art keywords
application
cardboard
line
producing liquid
coat
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Withdrawn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
EP15728463.9A
Other languages
German (de)
English (en)
Inventor
Roland Scheiflinger
Michael Stern
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP3164542A1 publication Critical patent/EP3164542A1/fr
Withdrawn legal-status Critical Current

Links

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
    • D21H19/80—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
    • 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
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • 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
    • D21H19/824—Paper comprising more than one coating superposed two superposed coatings, both being non-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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper

Definitions

  • the present invention relates to a method for the production of liquid cardboard, a device for the production of liquid cardboard and liquid cardboard produced by this method.
  • a multilayer raw board is at least made of a cover and a backing layer and optionally an insert layer on a cardboard machine ne produced.
  • Each of these layers is produced by dewatering an aqueous pulp suspension and sheet formation in a wire section of the board machine and the individual layers are gassed together to obtain a multilayer board web.
  • the multilayer board web is further mechanically dewatered in a press section, for example by roller, suction and / or shoe presses, thermally dried in a dryer section, optionally smoothed in a calender and a multi-layered green board or a multi-layered board is produced .
  • the multilayer board web can obtain surface treatments in which additives, in particular dry strength agents, such as, for example, starch are applied using a size press or film press or spray application.
  • coating layers are applied to the multilayer raw board web with application units and these then dried.
  • This surface finishing is also referred to as brushing and takes place either off-line, after the board machine in an external coater or in-line with in the board machine arranged coating units. It is known to apply several coating layers. A distinction is made between one or more pre-coat (s) and top coat (s) according to the job sequence and the respective properties of the coating layer.
  • the coated liquid carton web usually still undergoes a smoothing in a calender, in particular a calender. Further processing steps of the liquid carton include printing and processing into liquid packaging such as liquid and semi-liquid foods such as milk, juices and soups.
  • Liquid carton has basis weights in the range of 150-500 g / m 2 and needs good printability properties for optimal reproduction of printed images.
  • WO201 1 / 157639A1 describes a process for producing a coated single-layer or multi-layer fibrous web, wherein the fibrous web is coated with a barrier layer.
  • the commissioned work will be a curtain commissioned work.
  • a barrier layer is applied and a surface weight of the cover layer of less than 60 g / m 2 is not known from WO 201 1 / 157639A1.
  • EP1964971 A2 describes a process for the production of a coated fibrous web, wherein one side of the fibrous web is coated with at least three application layers and the last two application layers are wet in wet, ie without a drying step between the two application steps.
  • a fibrous web with a cover ply weight of less than 60 g / m 2 is not known from EP1964971 A2.
  • DE102006040684A1 describes a method for operating a multiple application device for application to a fibrous web, wherein the application is interrupted on the fibrous web during the start-up phase and / or during a demolition.
  • a fibrous web with a cover layer weight of less than 60 g / m 2 is not known from DE102006040684A1.
  • the reduction of the cover layer basis weight should make it possible to use additional fibers in other board layers and to achieve an improved strength potential, in particular the flexural rigidity, for the same total surface weights of the liquid carton.
  • the method according to the invention for the production of liquid board has, compared to conventional methods, the provision of a cover layer with a basis weight of less than 60 g / m 2 and the application of at least first line to the surface of the cover layer is carried out as a continuous line, whereby a good coverage is achieved and thus fiber can be saved in the top layer.
  • the fiber saved in the top layer can be replaced by other fibers with other improved properties in the other board layers. This allows for improved strength potential and flexural rigidity for the same total area weights of the liquid carton.
  • the invention therefore provides a process for the production of liquid cardboard comprising the steps:
  • Another object of the invention is a device for the production of liquid cardboard according to the inventive method.
  • Another object of the invention is a device for the production of liquid cardboard, wherein the device at least for the application of the at least one first stroke in step d) and / or the at least one top coat in step e) has a coating unit, which is selected from under curtain applicators and especially a curtain coater.
  • Another object of the invention is liquid carton, which was prepared according to the inventive method and / or with the device according to the invention.
  • Another object of the invention is the use of liquid cardboard, prepared by the method according to the invention and / or with the device according to the invention, as a print carrier, in particular in the flexo preprint and -Postprint, for the offset, gravure, flexo, laser, Screen inkjet and high pressure, for the production of food packaging, in particular packaging for liquid and semi-liquid foods, in particular milk, juices and soups and combinations thereof.
  • cardboard grades which are coated under liquid cardboard are understood, which can be processed into packaging of liquids.
  • unfinished cardboard is understood to mean an uncoated cardboard consisting of at least two fiber layers co-crimped together.
  • a cover-layer composition is understood as meaning a composition comprising at least one fibrous fraction. Pulp content is selected from bleached long-fiber pulps, in particular made from softwoods and short-fiber pulps, in particular produced from hardwoods such as birch and eucalyptus, and mixtures thereof.
  • a backsize composition is understood as meaning a composition comprising at least one fibrous fraction.
  • fiber content fibers are selected from unbleached long-fiber pulps, especially made of coniferous wood and chemo-thermo-mechanical pulp (CTMP) as chemically pretreated thermo-mechanical pulp and mixtures thereof understood.
  • CMP chemo-thermo-mechanical pulp
  • surface additive is understood as meaning a chemical additive for application to the surface of a paper or board web and influencing the paper or board properties.
  • chemical additives are selected from dry strength agents, in particular starch and its derivatives, sizing agents, water repellents, in particular waxes, and mixtures thereof.
  • Smoothing in the context of the present invention is understood as meaning the reduction of the surface roughness of a paper or board web. Smoothing can be done with conven- tional smoothing units selected under Hardnip-, Softnip-, Breitnip-, Schuhglätttechniken, calenders and combinations thereof are performed.
  • a contours line is understood to mean a coat application which, like the film or cardboard surface, lays like a film on the surface structure and follows the unevenness of the paper or board surface.
  • the outline bar provides good coverage of the base paper or paperboard web since the coating film has the same thickness throughout the paper or board surface.
  • the surface of the base paper or cardboard web remains uneven.
  • commissioned works are selected from film and size presses, curtain coaters, spray coaters and combinations thereof.
  • a liner disposed between the topsheet and the backsheet is provided with a liner composition.
  • an interlining composition is understood as meaning a composition comprising at least one pulp fraction.
  • fibers are selected from bleached and unbleached long fiber pulps, in particular made from softwoods and short fiber pulps, in particular made from hardwoods such as birch and eucalyptus and chemo-thermo-mechanical pulp (CTMP) as chemically pretreated thermo-mechanical pulp and bleached chemo-thermo -Mechanical pulp (BCTMP) as a bleached chemically pretreated thermo-mechanical pulp and mixtures thereof understood.
  • CMP chemo-thermo-mechanical pulp
  • BCTMP bleached chemo-thermo -Mechanical pulp
  • the application of the first stroke in step d) is selected as a contours line under a curtain coating, a spray application, a roller application, in particular a film press application and combinations thereof.
  • at least one further line between the at least one first line in step d) and the at least one cover line in step e) is applied to the at least first line in step d).
  • the application of the at least one further line is preferably carried out as a contour line.
  • the application of the at least one further stroke is selected as a contours line under a curtain coating, a spray application, a roller coating, in particular a film press application and combinations thereof.
  • the application of the at least one topcoat in step e) is performed as a contour stroke.
  • the application of the top coat in step e) is selected as an outline under a curtain coating, a spray application, a roller coating, in particular a film press application, and combinations thereof.
  • the topsheet fabric composition in step a) is provided with a short fiber content of greater than 90%, preferably in the range of 93 to 100%, more preferably in the range of 96 to 100%, most preferably 100%, respectively based on the total pulp content of the topcoat composition.
  • fibrous materials selected from short fiber pulps are understood as meaning short fiber pulps, in particular produced from hardwoods, such as birch and eucalyptus, and mixtures thereof.
  • the top layer in step a) has an opacity to DIN 53146 of more than 70%, preferably in the range of 80 to 100%, particularly preferably in the range of 85 to 100%, very particularly preferably in the range of 90 to 100%.
  • FIGS. 1 to 2 The invention is explained in more detail below by FIGS. 1 to 2 and the examples.
  • FIG. 1 shows schematically a cross-sectional view of a liquid carton according to the prior art
  • Fig. 2 shows schematically a cross-sectional view of an inventive
  • Liquid cartons produced by the process according to the invention.
  • FIG. 1 shows schematically a cross-sectional view of a liquid carton 1 according to the prior art.
  • a blank cardboard 2 is constructed from a cover layer 3, an insert 4 and a backsheet 5.
  • the cover layer 3 and the backsheet 5 of the green cardboard 2 are coated with a surface additive 6, 6 '.
  • a first line 7 is applied as a leveling line to the surface of the cover layer 3 coated with the surface additive 6.
  • a further line 8 is applied to the first line 7 as a leveling line, and on the further line 8 is a cover line 9 as a leveling line applied.
  • FIG. 2 schematically shows a cross-sectional representation of a liquid carton according to the invention produced by the process according to the invention.
  • the structure essentially corresponds to the construction of FIG. 1 with the difference that in FIG. 2A the first line 7 is applied as a contour line and in FIG. 2B the first line 7 and the further line 8 are applied as a contour line.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)
  • Wrappers (AREA)

Abstract

La présente invention concerne un procédé de production de carton pour liquide (1), comprenant les étapes suivantes consistant à : a) produire un carton brut (2) comportant au moins une couche supérieure (3) ayant une composition de couche supérieure et une couche de dos (5) ayant une composition de couche de dos, b) appliquer un additif de surface (6, 6') sur la couche supérieure (3) et/ou la couche de dos (5), c) lisser le carton de base (2), d) appliquer au moins un première couche de finition (7) sur la couche supérieure (3) du carton de base (2), e) appliquer au moins une couche de finition supérieure (9) sur l'au moins une première couche de finition (7), la couche supérieure (3) ayant un grammage inférieur à 60 g/m2 et l'application de l'au moins une première couche de finition (7) étant réalisée à l'étape d) en tant que couche de finition de contour.
EP15728463.9A 2014-07-02 2015-06-02 Procédé de production de carton pour liquide, dispositif de production de carton pour liquide et carton pour liquide selon ce procédé Withdrawn EP3164542A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014212782 2014-07-02
PCT/EP2015/062200 WO2016000892A1 (fr) 2014-07-02 2015-06-02 Procédé de production de carton pour liquide, dispositif de production de carton pour liquide et carton pour liquide selon ce procédé

Publications (1)

Publication Number Publication Date
EP3164542A1 true EP3164542A1 (fr) 2017-05-10

Family

ID=53385608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15728463.9A Withdrawn EP3164542A1 (fr) 2014-07-02 2015-06-02 Procédé de production de carton pour liquide, dispositif de production de carton pour liquide et carton pour liquide selon ce procédé

Country Status (3)

Country Link
EP (1) EP3164542A1 (fr)
CN (1) CN106471185B (fr)
WO (1) WO2016000892A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE515824C2 (sv) * 2000-01-26 2001-10-15 Tetra Laval Holdings & Finance Förfarande för tillverkning av ett flerskiktat förpackningslaminat genom våtbeläggning, samt laminat tillverkat enligt förfarandet
FI20045321A (fi) * 2004-09-02 2006-03-03 Metso Paper Inc Metallihihnakierrolla varustettu kuiturainan käsittelylaite
DE102009029625A1 (de) * 2009-09-21 2011-03-24 Voith Patent Gmbh Maschine zur Herstellung und/oder Behandlung einer Faserstoffbahn
DE102010029617A1 (de) * 2010-06-02 2011-12-08 Voith Patent Gmbh Verfahren zur Herstellung einer gestrichenen, mehrlagigen Faserstoffbahn
DE102010029615A1 (de) * 2010-06-02 2011-12-08 Voith Patent Gmbh Verfahren zur Herstellung einer gestrichenen, mehrlagigen Faserstoffbahn

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016000892A1 *

Also Published As

Publication number Publication date
CN106471185B (zh) 2019-01-18
CN106471185A (zh) 2017-03-01
WO2016000892A1 (fr) 2016-01-07

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