EP1266088B1 - Procede de calandrage de papier et dispositif correspondant comprenant un rouleau chauffable - Google Patents

Procede de calandrage de papier et dispositif correspondant comprenant un rouleau chauffable Download PDF

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Publication number
EP1266088B1
EP1266088B1 EP01909876A EP01909876A EP1266088B1 EP 1266088 B1 EP1266088 B1 EP 1266088B1 EP 01909876 A EP01909876 A EP 01909876A EP 01909876 A EP01909876 A EP 01909876A EP 1266088 B1 EP1266088 B1 EP 1266088B1
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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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German (de)
English (en)
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EP1266088A1 (fr
EP1266088B2 (fr
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
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Publication of EP1266088B1 publication Critical patent/EP1266088B1/fr
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Publication of EP1266088B2 publication Critical patent/EP1266088B2/fr
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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.
  • the invention also relates to a device for calendering paper in a calender according to the preamble of claim 8.
  • 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 and a device for calendering paper, by which method and device the drawbacks associated with the state of the art are avoided and which method and device 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 device according to the invention is in turn characterized by the feature of the characterizing part of claim 8.
  • 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 calendering can also be performed such that a roll nip is used as the first nip and an extended nip is used only after it, if the process so requires. It is, of course, also possible to use the calender such that only one nip, either the extended nip or the soft nip, is in use.
  • the caliper profiling of the web is, however, performed by means of the roll nip.
  • 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.
  • the calendering can also be accomplished first by means of the roll nip N 2 , N 4 and only after that by means of the extended nip N 1 , N 3 , if the process demands this. In that connection, the run of the paper web W is opposite to that shown in the figure.

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  • Paper (AREA)

Claims (15)

  1. Procédé de calandrage de papier dans une calandre qui comprend au moins une unité de calandre (10; 110) dans laquelle un premier interstice de calandrage (N1:N3) est formé entre un rouleau de calandre pouvant être chauffé (16; 116) et un premier rouleau (12; 112), interstice dans lequel une bande de papier (W) est guidée de manière à circuler afin de calandrer le papier sur au moins une face, et dans lequel dans l'unité de calandre (10; 110) un second interstice de calandrage (N2:N4) est formé avec le rouleau de calandre pouvant être chauffé (16; 116) et un troisième rouleau de calandre (17; 117), lequel interstice étant un interstice entre rouleaux, et la bande de papier (W) est guidée de manière à circuler dans ledit interstice entre rouleaux (N2:N4) de telle sorte que, dans les deux interstices de calandrage (N1, N3; N2, N4), la même face de la bande de papier (W) est en contact avec le rouleau de calandre pouvant être chauffé (16; 116), caractérisé en ce que ledit premier rouleau (12; 112) est un rouleau à interstice étendu, de sorte que le premier interstice est un interstice étendu.
  2. Procédé selon la revendication 1, caractérisé en ce que le second interstice de calandrage (N2; N4) est formé entre un rouleau de calandre (17; 117) pourvu d'un revêtement souple de rouleau (18; 118) et le rouleau de calandre pouvant être chauffé (16; 116), de sorte que ledit second interstice de calandrage (N2; N4) est un interstice souple.
  3. Procédé selon la revendication 1, caractérisé en ce que le second interstice de calandrage (N2:N4) est formé entre un rouleau de calandre à surface dure (17; 117) et le rouleau de calandre pouvant être chauffé (16; 116) de telle sorte que ledit second interstice de calandrage (N2:N4) est un interstice rigide.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande de papier (W) est calandrée dans l'unité de calandre (10; 110) tout d'abord au moyen du premier interstice de calandrage (N2; N4), c'est-à-dire un interstice étendu, et après cela, au moyen du second interstice de calandrage (N2; N4), c'est-à-dire un interstice entre rouleaux (16;116) et qu'entre les interstices de calandrage, la bande de papier (W) est écarté de tout contact avec la surface du rouleau de calandre pouvant être chauffé (16; 116).
  5. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la bande de papier (W) est calandrée dans l'unité de calandre (10; 110) tout d'abord au moyen du second interstice de calandrage (N2:N4), c'est-à-dire un interstice entre rouleaux, et ensuite au moyen du premier interstice de calandrage (N1; N3), c'est-à-dire un interstice étendu, et qu'entre les interstices de calandrage, la bande de papier (W) est écartée de tout contact avec la surface du rouleau de calandrage pouvant être chauffé (16; 116).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans l'unité de calandrage (10; 110), un profilage de l'épaisseur de la bande de papier (W) est exécuté au moyen de l'interstice entre rouleaux (N2; N4).
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans la calandre, la bande de papier (W) traverse deux unités de calandre successives (10; 110) entre lesquelles la bande de papier (W) est retournée de sorte que dans les unités de calandre successives, une face différente de la bande de papier vient en contact avec le rouleau de calandre pouvant être chauffé (16; 116) de telle sorte que la bande de papier (W) est calandrée sur deux faces.
  8. Dispositif pour calandrer un papier dans une calandre qui comprend au moins une unité de calandre (10; 110) qui inclut un cadre de calandre (11; 111) et un rouleau de calandre pouvant être chauffé (16; 116) et un premier rouleau (12; 112) monté dans le cadre, lesquels rouleaux forment entre eux un premier interstice de calandrage (N1; N3), dans lequel une bande de papier (W) peut être guidée de manière à circuler afin de calandrer le papier sur au moins une face, et dans lequel un troisième rouleau de calandre (17; 117) est monté dans l'unité de calandre (10; 110), lequel rouleau forme un second interstice de calandrage (N2; N4) avec le rouleau de calandre pouvant être chauffé (16; 116), lequel interstice est un interstice entre rouleaux, auquel cas la bande de papier (W) peut être guidée de manière à circuler dans ledit interstice entre rouleaux (N2; N4) de telle sorte que dans les deux interstices de calandrage (N1, N3; N2, N4), la même face de la bande de papier (W) est en contact avec le rouleau de calandre pouvant être chauffé (16; 116), caractérisé en ce que ledit premier rouleau (12; 112) est un rouleau à interstice étendu de sorte que ledit premier interstice de calandrage est un interstice étendu.
  9. Dispositif selon la revendication 8, caractérisé en ce que le troisième interstice de calandrage(17; 117) est pourvu d'un revêtement de rouleau souple (18; 118) de telle sorte que l'interstice de calandrage (N2, N4) entre ledit troisième rouleau de calandre (17; 117) et le rouleau de calandre pouvant être chauffé (16; 116) est un interstice souple.
  10. Dispositif selon la revendication 9, caractérisé en ce que le revêtement de rouleau (18; 118) du troisième de calandre (17; 117) est un revêtement polymère.
  11. Dispositif selon la revendication 8, caractérisé en ce que le troisième rouleau de calandre (17; 117) est un rouleau de calandre à surface dure (17; 117) de sorte que l'interstice de calandrage (N2; N4) entre ledit troisième rouleau de calandre (17; 117) et le rouleau de calandre pouvant être chauffé (16; 116) est un interstice dur.
  12. Dispositif selon l'une quelconque des revendications 8 à 11, caractérisé en ce que dans l'unité de calandre (10; 110), la bande de papier (W) a été disposée de manière à pénétrer tout d'abord dans le premier interstice de calandre (N1; N3), c'est-à-dire un interstice étendu, à la suite duquel la bande de papier (W) est guidé sans contact avec la surface du rouleau de calandre pouvant être chauffé (16; 116) et ensuite pénètre dans le second interstice de calandrage (N2; N4), c'est-à-dire un interstice entre rouleaux.
  13. Dispositif selon l'une quelconque des revendications 8 à 11, caractérisé en ce que, dans l'unité de calandrage (10; 110), la bande de papier (W) est agencée de manière à pénétrer tout d'abord dans le second interstice de calandre (N2; N4), c'est-à-dire un interstice entre rouleaux, à la suite de quoi la bande de papier (W) est guidée en étant écartée de tout contact avec la surface dudit rouleau de calandre pouvant être chauffé (16; 116) et ensuite pénètre dans le premier interstice de calandre (N1; N3), c'est-à-dire un interstice étendu.
  14. Dispositif selon l'une quelconque des revendications 8 à 13, caractérisé en ce que l'unité de calandre (10; 110) est équipée de moyens pour exécuter le profilage de calibrage de la bande de papier (W) à l'aide de l'interstice entre rouleaux (N2; N4).
  15. Dispositif selon l'une quelconque des revendications 8 à 14, caractérisé en ce que la calandre comprend deux unités de calandre successives (10; 110) dans lesquelles passe la bande de papier (W) à l'état retourné de telle sorte que, dans les unités de calandre successives, une face différente de la bande de papier vient en contact avec le rouleau de calandre devant être chauffé (16; 116) de manière à calandrer la bande de papier (W) sur deux faces.
EP01909876A 2000-02-16 2001-02-16 Procede de calandrage de papier et dispositif correspondant comprenant un rouleau chauffable Expired - Lifetime EP1266088B2 (fr)

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 (fr) 2000-02-16 2001-02-16 Procede de calandrage de papier et dispositif correspondant comprenant un rouleau chauffable

Publications (3)

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

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ID=8557545

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Application Number Title Priority Date Filing Date
EP01909876A Expired - Lifetime EP1266088B2 (fr) 2000-02-16 2001-02-16 Procede de calandrage de papier et dispositif correspondant comprenant un rouleau chauffable

Country Status (7)

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

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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI62874C (fi) † 1979-10-15 1983-03-10 Valmet Oy Pappers kalander
DE3821027A1 (de) * 1988-06-22 1989-12-28 Kuesters Eduard Maschf Kalanderanordnung
DE4322876A1 (de) † 1993-07-09 1993-11-18 Voith Gmbh J M Vorrichtung zum Glätten einer Papierbahn oder Kartonbahn
DE19508353A1 (de) * 1995-03-09 1996-09-12 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Behandlung einer Papierbahn
DE29504034U1 (de) † 1995-03-09 1995-05-04 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
DE19757474A1 (de) * 1997-12-23 1999-06-24 Voith Sulzer Papiertech Patent Papierkalander

Also Published As

Publication number Publication date
DE60104996T2 (de) 2005-08-18
FI113288B (fi) 2004-03-31
FI20000341A (fi) 2001-08-16
WO2001061107A1 (fr) 2001-08-23
ATE274105T1 (de) 2004-09-15
FI20000341A0 (fi) 2000-02-16
JP2003522857A (ja) 2003-07-29
AU2001237478A1 (en) 2001-08-27
DE60104996D1 (de) 2004-09-23
EP1266088A1 (fr) 2002-12-18
EP1266088B2 (fr) 2010-03-24
DE60104996T3 (de) 2010-08-26

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