EP1266088B2 - Verfahren und vorrichtung zum kalandrieren von papier mit einer beheizten walze - Google Patents

Verfahren und vorrichtung zum kalandrieren von papier mit einer beheizten walze Download PDF

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Publication number
EP1266088B2
EP1266088B2 EP01909876A EP01909876A EP1266088B2 EP 1266088 B2 EP1266088 B2 EP 1266088B2 EP 01909876 A EP01909876 A EP 01909876A EP 01909876 A EP01909876 A EP 01909876A EP 1266088 B2 EP1266088 B2 EP 1266088B2
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EP
European Patent Office
Prior art keywords
nip
roll
calender
calendering
paper web
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.)
Expired - Lifetime
Application number
EP01909876A
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English (en)
French (fr)
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EP1266088A1 (de
EP1266088B1 (de
Inventor
Matti Lares
Timo Torvi
Heikki Kaarakka
Ville Tiistola
Seppo Palonen
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.)
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
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Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Publication of EP1266088A1 publication Critical patent/EP1266088A1/de
Publication of EP1266088B1 publication Critical patent/EP1266088B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0293—Provisions or constructions to facilitate the removal of the rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a method for calendering paper in a calender according to the preamble of claim 1.
  • Belt and shoe calenders i.e. more generally extended-nip calendering, provide a gloss that corresponds to that of a supercalendered quality or is at least fairly close to the gloss achieved by means of supercalendering, but it is difficult to achieve corresponding smoothness.
  • the maximum pressure in the nip of a belt and a shoe calender remains, because of a wider nip, lower than in conventional nips formed between two rolls, for which reason extended-nip calenders are most suitable for paper grades in which bulk preservation is of high significance. Extended-nip calendering has been found to be particularly good in calendering of low-gloss (under 40 % Hunter) paper grades. If clearly higher gloss is desired and required, the nip pressure provided by an extended-nip calender is not in itself sufficient to form gloss.
  • the aim of the present invention is to provide a novel method for calendering paper, by which method the drawbacks associated with the state of the art are avoided and which method provide an improved calendering result with respect to the prior art.
  • the method according to the invention is mainly characterized by the feature of the characterizing part of claim 1.
  • the invention provides a number of advantages over the prior art and of these advantages, for example, the following can be stated in this connection.
  • the properties of an extended-nip calender and a conventional calender provided with a roll nip have been combined in the invention, with the result that, in particular when an extended and low-pressure nip is used as the first nip of the calender, such an extended and low-pressure nip makes it possible to heat, plasticize and suitably mould the paper before the subsequent roll nip.
  • bulk of the paper can be preserved without compromising other quality characteristics.
  • a bulk saving of even about 7 % can be achieved as compared with conventional supercalendering.
  • the achieved benefit is based on longer nip dwell time and on higher calendering temperatures.
  • the calendering process is usually a rather "violent" operation towards the paper, but especially when a calendering nip extended in the manner according to the invention is used as the first nip of the calender in particular, it does not put so great stress on the paper as conventional roll nips, with the result that the structure of the paper does not suffer in calendering.
  • the strength properties of the paper can be kept good.
  • the arrangement according to the invention provides more forces parallel to the paper surface and, by the action of these forces parallel to the surface as well as by the action of plasticization of the web, the smoothness of the calendered paper also becomes better than that of the conventional standard.
  • the calender shown in the figure comprises two calender units 10, 110, which have been arranged one after the other with respect to the running direction of a paper web W.
  • the calender comprising the two calender units 10, 110 shown in the figure is used in the case where the paper web W is calendered on both sides.
  • papers of this kind to be calendered on both sides are, for example, fine papers intended for offset printing.
  • the invention can also be applied to one-sided calendering of the paper web W, in which connection only one of the calender units shown in the figure is needed.
  • papers of this kind to be calendered only on one side are, for example, label papers.
  • the first calender unit 10 comprises a calender frame 11 in which an extended-nip roll 12, a heatable calender roll, i.e. a so-called thermo roll 16, and a third calender roll 17 have been fitted to form a stack.
  • Said rolls 12, 16, 17 form with one another calendering nips N 1 , N 2 , of which the nip N 1 between the extended-nip roll 12 and the heatable calender roll 16 is an extended nip and, in a corresponding way, the nip N 2 between the heatable calender roll 16 and the third calender roll 17 is a roll nip.
  • the extended-nip roll 12 comprises a roll support 13, a belt shell 14 disposed on it, as well as a loading shoe 15 by means of which the belt shell 14 is loaded against the heatable calender roll 16 to form the extended nip N,.
  • the third calender roll 17 can be, as shown in the figure, a so-called soft roll which is provided with a soft roll cover 18, especially with a polymer cover.
  • the roll nip N 2 between the heatable calender roll 16 and the third calender roll 17 is a soft nip.
  • the third calender roll 17 may be without a soft polymer cover so that the third calender roll 17 is a hard roll, in which connection the roll nip N 2 is also a hard nip.
  • the paper web W is passed, while guided by a spreader roll 20, first into the extended nip N 1 of the calender unit 10. From the extended nip N 1 the paper web W is passed by means of a take-out roll 21 and a spreader roll 22 into the roll nip N 2 . From the second nip of the first calender unit 10, i.e. from the roll nip N 2 , the paper web W is passed, in the illustration of the figure, by means of guide and alignment rolls 23 - 27 to the second calender unit 110 of the calender.
  • the paper web W needs to be calendered only on one side, it is, of course, not passed to the second calender unit 110, but the paper web W can be passed after the second nip, i.e. the roll nip N 2 of the first calender unit 10 directly to further processing, for example, to a reel-up.
  • the calender shown in the figure of the drawing also includes the second calender unit 110, the structure and the operation of which are similar to those of the first calender unit 10.
  • the frame of the second calender unit has been denoted by the reference numeral 111, the extended-nip roll fitted in the frame by the reference numeral 112, the heatable roll by the reference numeral 116, and the third calender roll by the reference numeral 117.
  • the extended-nip roll 112 in the second calender unit 110 also comprises a roll support 113, a belt shell 114 disposed on the support, as well as a loading shoe 115 by means of which the belt shell 114 is loaded against the heatable calender roll 116 to form the first nip of the second calender unit 110, i.e. an extended nip N 3 .
  • the third calender roll 117 forms with the heatable roll 116 the second nip of the calender unit, i.e. a roll nip N 4 .
  • the third calender roll 117 may be a soft-surface roll provided with a soft roll cover, in particular with a polymer cover 118, but instead of this it is also possible to use a hard roll when the process so demands.
  • the paper web W is passed, while guided by the guide and alignment rolls already previously mentioned as well as by a guide roll 119 and a spreader roll 120, from the first calender unit 10 into the first nip of the second calender unit 110, i.e. into the extended nip N 3 .
  • the paper web W is passed, in the embodiment of the figure, by means of a take-out roll 121 and a spreader roll 122 into the second nip of the calender unit, i.e. into the roll nip N 4 . From the roll nip N 4 , the paper web W is passed to further processing, for example, to a reel-up.
  • the paper web W is thus calendered on both sides, first by the extended nip N 1 , N 3 and after that by the roll nip N 2 , N 4 , which roll nip may be either a soft or a hard nip.
  • the extended nip N 1 , N 3 as compared, for example, with traditional supercalendering, and the calendering effect is enhanced by the roll nip N 2 , N 4 in order to provide sufficient gloss.
  • the caliper profiling of the paper web is performed by means of the roll nip.

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  • Paper (AREA)

Claims (4)

  1. Verfahren zum Kalandrieren von Papier bei einem Kalander, der zumindest eine Kalandriereinheit (10; 110) aufweist, bei der ein erster Kalandrierspalt (N1; N3) zwischen einer erwärmbaren Kalandrierwalze (16; 116) und einer ersten Walze (12; 112) ausgebildet ist, wobei durch den Spalt eine Papierbahn (W) geführt wird, um zu laufen, damit das Papier an zumindest einer Seite kalandriert wird, wobei bei der Kalandriereinheit (10; 110) ein zweiter Kalandrierspalt (N2; N4) mit der erwärmbaren Kalandrierwalze (16; 116) und einer dritten Kalandrierwalze (17; 117) ausgebildet ist, und wobei die Papierbahn (W) so geführt wird, dass sie durch den zweiter Kalandrierspalt (N2; N4) derart läuft, dass bei beiden Kalandrierspalten (N1, N3; N2, N4) die gleiche Seite der Papierbahn (W) mit der erwärmbaren Kalandrierwalze (16; 116) in Kontakt steht, wobei die erste Walze (12; 112) eine Langspaltwalze ist, so dass der erste Spalt ein Langspalt ist, wobei die Papierbahn (W) in der Kalandriereinheit (10; 110) zunächst mittels des ersten Kalandrierspalts (N1; N3), d.h. mittels des Langspalts, und danach mittels des zweiten Kalandrierspalts (N2; N4) kalandriert wird, dadurch gekennzeichnet, dass der zweite Kalandrierspalts (N2; N4) ein Walzenspalt ist, der zwischen der erwärmbaren Kalandrierwalze (16; 116) und der dritten Kalandrierwalze (17; 117) ausgebildet ist, die entweder eine mit einer weichen Walzenbedeckung (18; 118) versehene Kalandrierwalze (17; 117) ist, so dass der zweite Kalandrierspalt (N2; N4) ein weicher Spalt ist, oder eine mit einer harten Oberfläche versehenen Kalandrierwalze (17; 117) ist, so dass der zweite Kalandrierspalt (N2; N4) ein harter Spalt ist.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass zwischen dem ersten Kalandrierspalt (N1; N3) und dem zweiten Kalandrierspalt (N2; N4) die Papierbahn (W) von dem Kontakt mit der Oberfläche der erwärmbaren Kalandrierwalze (16; 116) weg herausgenommen wird.
  3. Verfahren gemäß einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass bei der Kalandriereinheit (10; 110) ein Dickenprofilieren der Papierbahn (W) mittels des Walzenspalts (N2; N4) ausgeführt wird.
  4. Verfahren gemäß einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass bei dem Kalander die Papierbahn (W) durch zwei aufeinanderfolgende Kalandriereinheiten (10; 110) tritt, zwischen denen die Papierbahn (W) derart gedreht wird, dass bei den aufeinanderfolgenden Kalandriereinheiten eine andere Seite der Papierbahn mit der erwärmbaren Kalandrierwalze (16; 116) in Kontakt gelangt, um die Papierbahn (W) an beiden Seiten zu kalandrieren.
EP01909876A 2000-02-16 2001-02-16 Verfahren und vorrichtung zum kalandrieren von papier mit einer beheizten walze Expired - Lifetime EP1266088B2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20000341 2000-02-16
FI20000341A FI113288B (fi) 2000-02-16 2000-02-16 Menetelmä ja laite paperin kalanteroimiseksi
PCT/FI2001/000155 WO2001061107A1 (en) 2000-02-16 2001-02-16 Method and device for calendering paper, comprising a heatable roll

Publications (3)

Publication Number Publication Date
EP1266088A1 EP1266088A1 (de) 2002-12-18
EP1266088B1 EP1266088B1 (de) 2004-08-18
EP1266088B2 true EP1266088B2 (de) 2010-03-24

Family

ID=8557545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909876A Expired - Lifetime EP1266088B2 (de) 2000-02-16 2001-02-16 Verfahren und vorrichtung zum kalandrieren von papier mit einer beheizten walze

Country Status (7)

Country Link
EP (1) EP1266088B2 (de)
JP (1) JP2003522857A (de)
AT (1) ATE274105T1 (de)
AU (1) AU2001237478A1 (de)
DE (1) DE60104996T3 (de)
FI (1) FI113288B (de)
WO (1) WO2001061107A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206333C1 (de) † 2002-02-14 2003-07-31 Voith Paper Patent Gmbh Breitnip-Kalander-Anordnung und Verfahren zum Satinieren einer Papier- oder Karrtonbahn
DE10312705B3 (de) * 2003-03-21 2004-09-30 Voith Paper Patent Gmbh Kalander und Verfahren zum Ausbauen einer Unterwalze aus einem Kalander
DE102006001021A1 (de) * 2006-01-07 2007-07-12 Voith Patent Gmbh Mattsatinage
DE102011004730A1 (de) * 2011-02-25 2012-08-30 Voith Patent Gmbh Kalander
DE102019101807A1 (de) * 2019-01-25 2020-07-30 Voith Patent Gmbh Walzenwechsel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332191A (en) † 1979-10-15 1982-06-01 Valmet Oy Calender
DE4322876A1 (de) † 1993-07-09 1993-11-18 Voith Gmbh J M Vorrichtung zum Glätten einer Papierbahn oder Kartonbahn
EP0732446A1 (de) † 1995-03-09 1996-09-18 Voith Sulzer Finishing GmbH Kalander für die zweiseitige Behandlung einer Papierbahn
DE19715345A1 (de) † 1997-03-27 1998-10-01 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung einer gestrichenen Warenbahn, insbesondere aus Papier oder Karton

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821027A1 (de) * 1988-06-22 1989-12-28 Kuesters Eduard Maschf Kalanderanordnung
DE19508353A1 (de) * 1995-03-09 1996-09-12 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Behandlung einer Papierbahn
DE19757474A1 (de) * 1997-12-23 1999-06-24 Voith Sulzer Papiertech Patent Papierkalander

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332191A (en) † 1979-10-15 1982-06-01 Valmet Oy Calender
DE4322876A1 (de) † 1993-07-09 1993-11-18 Voith Gmbh J M Vorrichtung zum Glätten einer Papierbahn oder Kartonbahn
EP0732446A1 (de) † 1995-03-09 1996-09-18 Voith Sulzer Finishing GmbH Kalander für die zweiseitige Behandlung einer Papierbahn
DE19715345A1 (de) † 1997-03-27 1998-10-01 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung einer gestrichenen Warenbahn, insbesondere aus Papier oder Karton

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
"OPTIGLOSS for high-gloss grades", VALMET PAPER MACHINERY †
KUOSA H.: "Calendering concepts for printing grades", VALMET PM DAYS 96, 1996, pages 105 - 112 †
MARLEAUX H.-P.: "Von Matt bis Hochglanz-Praxiserfahrung mit On-/Off-line-Softkalandern fuer gestrichene Papiere", WOCHENBLATT FUER PAPIERFABRIKATION, PTS-STREICHEREI SYMPOSIUM, 1993, pages 154 - 159 †
TANI M.: "OptiDwell - Der Breitnipkalander", VALMET INFORMIERT PAPIERHERSTELLER, 1999, pages 18 - 21 †
TUOMISTO M.: "VALMETs Visionen fuer das Kalandrieren", WOCHENBLATT FUER PAPIERFABRIKATION, no. 4, 1999, pages 248 - 253 †
TURTINEN P.; TANI M.: "Valmet Corp. Calenders "OptiDwell - The new bulk preserving calendering method", PITA ANNNUAL CONFERENCE, SESSION 2, PAPER 5, 1998, pages 55 - 59 †
WIKSTROEM M. ET AL: "Calendering of coated paper and board in an extended soft nip", NORDIC PULP AND PAPER RESEARCH JOURNAL, vol. 12, no. 4, 1997, pages 289 - 298 †

Also Published As

Publication number Publication date
DE60104996D1 (de) 2004-09-23
FI20000341A (fi) 2001-08-16
DE60104996T2 (de) 2005-08-18
EP1266088A1 (de) 2002-12-18
EP1266088B1 (de) 2004-08-18
DE60104996T3 (de) 2010-08-26
WO2001061107A1 (en) 2001-08-23
ATE274105T1 (de) 2004-09-15
FI20000341A0 (fi) 2000-02-16
FI113288B (fi) 2004-03-31
JP2003522857A (ja) 2003-07-29
AU2001237478A1 (en) 2001-08-27

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