EP2090692A1 - Procédé et dispositif d'application et de séchage d'un support - Google Patents

Procédé et dispositif d'application et de séchage d'un support Download PDF

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Publication number
EP2090692A1
EP2090692A1 EP09150821A EP09150821A EP2090692A1 EP 2090692 A1 EP2090692 A1 EP 2090692A1 EP 09150821 A EP09150821 A EP 09150821A EP 09150821 A EP09150821 A EP 09150821A EP 2090692 A1 EP2090692 A1 EP 2090692A1
Authority
EP
European Patent Office
Prior art keywords
material web
drying cylinder
medium
web
application medium
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Withdrawn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
EP09150821A
Other languages
German (de)
English (en)
Inventor
Günter HALMSCHLAGER
Rudolf Estermann
Manfred Feichtinger
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 EP2090692A1 publication Critical patent/EP2090692A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/009—Apparatus for glaze-coating paper webs
    • 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
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper
    • D21H23/28—Addition before the dryer section, e.g. at the wet end or press section

Definitions

  • the invention relates to a method for applying a medium to a moving material web, in particular paper or board web, and for drying the medium applied to the material web.
  • a method and a device are known in which a polymer layer is applied to the material web and the polymer layer applied to the material web, while still wet, is brought into contact with a hot surface in order to cause the water contained in it to boil and thereby cavities arise below the surface, but the outer surface of the layer is smooth.
  • the application medium is applied to the material web and the material web is then fed to a smooth heatable drying cylinder, wherein the material web is fed to the drying cylinder via a press roll.
  • the invention has for its object to provide an improved method and an improved device of the type mentioned, with which in particular the strength and / or smoothness of the web is further increased.
  • this object is achieved in that the application medium is transferred to the material web, which is guided with the still moist coating medium material web together with at least one support band formed by a press roll and a heated smooth drying cylinder press nip in which the Material web comes with its the application medium having side with the drying cylinder in contact, and the material web is guided after the press nip together with the at least one support band around at least a portion of the circumference of the drying cylinder, the case via an associated him overpressure hood with a pressurized standing liquid or gaseous medium is applied.
  • the material web is smoothed in the press nip and dried at the same time on the drying cylinder with associated overpressure hood. By pressing the material web to the drying cylinder, the surface of the drying cylinder is imaged on the web, resulting in a particularly high smoothness and thus a very good printability.
  • the application medium is preferably transferred to the material web via an applicator roll.
  • the application medium is advantageously transferred from the application roller to the material web in the region of the press roller looped around by the material web.
  • the application medium can also be transferred to the material web via a free jet.
  • the metering of the order of the application medium is advantageously carried out via a blade, a squeegee bar and / or the like.
  • a release agent can be applied to the drying cylinder.
  • a sealing strip in particular consisting of metal, is guided around the drying cylinder, wherein the sealing strip is arranged on the side of the support belt facing away from the material web.
  • the material web provided with the application medium is guided through at least two units each comprising a commissioned unit and a drying cylinder with an associated overpressure hood.
  • the strength of the material web on the contact pressure of the press roll against the drying cylinder is controlled and / or regulated.
  • the above-mentioned object is achieved according to the invention by comprising a commissioned unit for transferring the application medium to the material web, a heatable smooth drying cylinder and an overpressure hood assigned thereto, the material web provided with the still moist application medium together with at least one support band is guided by a press nip formed between a press roll and the heated smooth drying cylinder, in which the material web comes with its the application medium having side with the drying cylinder in contact, and the web following the press nip together with the at least one support band around at least a part the scope of the Dry cylinder is guided, which can be acted upon by its associated overpressure hood with a pressurized liquid or gaseous medium.
  • the method according to the invention or the device according to the invention for applying and drying a medium results in a strength and / or smoothness increase or printability improvement.
  • the inventive combination of a commissioned work with a drying cylinder with associated overpressure hood a more compact overall structure is achieved.
  • a plurality of units each comprising an application unit, a drying cylinder and an overpressure hood associated therewith can be connected in series.
  • the applicator combined with the pressing cylinder which can be pressed against the drying cylinder can be configured variably, wherein optionally also a laterally reversed arrangement of the commissioned unit and drying cylinder with associated overpressure hood or a rotated drying cylinder with associated overpressure hood are conceivable.
  • the order of the medium concerned can be done via a roller or a free jet.
  • the dosage of the job is done for example via a blade, a squeegee and / or the like.
  • a device for applying a release agent (“release agent”) can be provided.
  • the application medium can therefore be transferred to the web by means of suitable devices.
  • the web is then smoothed in the press nip and dried, including the applied medium at the same time on the cylinder with associated overpressure hood.
  • the surface of the drying cylinder imaged on the web resulting in a particularly high smoothness and thus a very good printability.
  • the strength of the material web can be influenced.
  • the temperature of the pressurized liquid or gaseous medium, with which the drying cylinder is acted upon, is expediently lower than the temperature on the outside of the part of the drying cylinder wound around the material web and the support belt, whereby a high liquid discharge from the material web is achieved.
  • the support belt and the voltage applied to the support side of the web are cooled by the preferably liquid medium, so that sets a temperature gradient of the heated drying cylinder in the direction of the support belt. As a result, both the heat flow is increased and the discharge of the partially emerging as a vapor from the web liquid.
  • the liquid therefore preferably exits the material web on the side lying against the support band.
  • Fig. 1 shows a schematic representation of an exemplary embodiment of a device 10 for applying a medium to a moving material web 12 and for drying the applied to the material web 12 medium.
  • the material web 12 may in particular be a paper or board web.
  • the device 10 comprises a commissioned work 14, via which the application medium is transferred to the material web 12, a heatable smooth drying cylinder 16 and an overpressure hood 18 associated therewith.
  • the material web 12 provided with the still moist application medium is guided together with at least one in particular porous support belt 20 by a press nip 24 formed between a press roll 22 and the heated smooth drying cylinder 16, in which the material web 12 with its drying medium having the application medium side 16 comes into contact.
  • the material web 12 is guided together with the at least one support band 20 around at least part of the circumference of the drying cylinder 16.
  • this drying cylinder 16 is acted upon by its associated overpressure hood 18 with a pressurized liquid or gaseous medium.
  • the application medium is transferred to the material web 12 via an applicator roll 26.
  • the application medium as shown, in particular in the region of the looped by the material web Press roll 22 are transferred from the applicator roll 26 to the web 12.
  • dosing means 28 for metering the application of the application medium, dosing means 28, in particular a blade, a doctor bar and / or the like, may be provided.
  • the material web 12 is finally separated again from the drying cylinder 16 together with the support belt 20 in the region of a roller 32.
  • Means 30 can be provided in order to apply a release agent to the drying cylinder 16 in the area of the drying cylinder 16 which is not wrapped by the material web 12 and the support belt 20.
  • a sealing strip (not shown), in particular made of metal, can also be guided around the drying cylinder 16, wherein the sealing strip is arranged on the side of the support band 20 facing away from the material web 12.
  • At least two in each case one applicator 14 and a drying cylinder 16 with associated overpressure hood 18 comprehensive units 16, 18 may be provided through which provided with the application medium material web 12 is passed.
  • the overpressure hood 18 is arranged above the drying cylinder 16.
  • the material web 12 and the support band 20 are guided in a clockwise direction over the drying cylinder 16.
  • Fig. 2 shows a schematic representation of another exemplary embodiment of the device 10, in which the overpressure hood 18 is arranged below the drying cylinder 16 and the material web 12 is guided together with the support belt 20 in the counterclockwise direction about the drying cylinder 16.
  • the commissioned work 14 also does not include an applicator roll. Rather, in the present case, the application medium is transferred to the material web 12 via a free jet, which in particular forms a kind of curtain.
  • the device 10 has according to Fig. 2 at least again the same structure as that of Fig. 1 , wherein like reference numerals are assigned to corresponding parts.

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  • Paper (AREA)
  • Coating Apparatus (AREA)
EP09150821A 2008-02-12 2009-01-19 Procédé et dispositif d'application et de séchage d'un support Withdrawn EP2090692A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810000282 DE102008000282A1 (de) 2008-02-12 2008-02-12 Verfahren und Vorrichtung zum Auftragen und Trocknen eines Mediums

Publications (1)

Publication Number Publication Date
EP2090692A1 true EP2090692A1 (fr) 2009-08-19

Family

ID=40627541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09150821A Withdrawn EP2090692A1 (fr) 2008-02-12 2009-01-19 Procédé et dispositif d'application et de séchage d'un support

Country Status (2)

Country Link
EP (1) EP2090692A1 (fr)
DE (1) DE102008000282A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586700A1 (fr) 2004-04-13 2005-10-19 Voith Paper Patent GmbH Machine à papier
DE102004017829A1 (de) * 2004-04-13 2005-11-03 Voith Paper Patent Gmbh Trockenanordnung
DE102004017824A1 (de) 2004-04-13 2005-11-03 Voith Paper Patent Gmbh Trockenanordnung
DE102004036276A1 (de) * 2004-07-27 2006-02-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Aufbringen eines Auftragmediums in einer Maschine zur Herstellung einer Faserstoffbahn
WO2007100667A2 (fr) 2006-02-23 2007-09-07 Meadwestvaco Corporation Procédé de traitement d'un substrat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586700A1 (fr) 2004-04-13 2005-10-19 Voith Paper Patent GmbH Machine à papier
DE102004017829A1 (de) * 2004-04-13 2005-11-03 Voith Paper Patent Gmbh Trockenanordnung
DE102004017824A1 (de) 2004-04-13 2005-11-03 Voith Paper Patent Gmbh Trockenanordnung
DE102004036276A1 (de) * 2004-07-27 2006-02-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Aufbringen eines Auftragmediums in einer Maschine zur Herstellung einer Faserstoffbahn
WO2007100667A2 (fr) 2006-02-23 2007-09-07 Meadwestvaco Corporation Procédé de traitement d'un substrat

Also Published As

Publication number Publication date
DE102008000282A1 (de) 2009-08-13

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