EP1330573B1 - Procede de calandrage d'une feuille continue et systeme associe comportant une calandre a grande longueur de contact - Google Patents

Procede de calandrage d'une feuille continue et systeme associe comportant une calandre a grande longueur de contact Download PDF

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Publication number
EP1330573B1
EP1330573B1 EP01969838A EP01969838A EP1330573B1 EP 1330573 B1 EP1330573 B1 EP 1330573B1 EP 01969838 A EP01969838 A EP 01969838A EP 01969838 A EP01969838 A EP 01969838A EP 1330573 B1 EP1330573 B1 EP 1330573B1
Authority
EP
European Patent Office
Prior art keywords
nip
roll
long
calendering
calender
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
EP01969838A
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German (de)
English (en)
Other versions
EP1330573A1 (fr
Inventor
Matti Lares
Mikko Tani
Kimmo Saharinen
Henri Vaittinen
Pekka Koivukunnas
Reijo PIETIKÄINEN
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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Filing date
Publication date
Priority claimed from FI20002170A external-priority patent/FI108556B/fi
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Publication of EP1330573A1 publication Critical patent/EP1330573A1/fr
Application granted granted Critical
Publication of EP1330573B1 publication Critical patent/EP1330573B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21G1/006—Calenders; Smoothing apparatus with extended nips

Definitions

  • the present invention relates to a method for calendering a material web and a calender arrangement for implementing the method.
  • the object of the invention is a method for calendering a material web, especially a paper or board web, in a long-nip calender, in which the backing roll of the long-nip roll is a heated, metal-surfaced roll, in which case the length of the nip in the direction of travel of the material web is within the range from approximately 10 mm to 500 mm.
  • the invention also relates to a calender arrangement for calendering a material web, especially a paper or board web, the said arrangement comprising a long-nip calender, in which the backing roll of the long-nip roll is a heated, metal-surfaced roll, the rolls of which form a long nip between them, the length of which in the direction of travel of the web is within the range from approximately 10 mm to 500 mm.
  • the effective length of the nip increases due to the initial contact and because it is possible to use much softer polymers as belt material than in roll coatings without problems arising from deformation due to heat.
  • the pressure impulse directed at the paper can be increased without the pressure peak becoming too great and the bulkiness beginning to diminish.
  • a belt calendering solution has been previously described, for example, in Finnish patent publication no. 95061 and in WO- 98 00270, in which the calendering nip is formed between a heated, hard-surfaced roll and a metal belt supported by means of a calender roll having a resilient coating.
  • One disadvantage of this solution is that the maximum nip pressure is insufficient for several paper grades requiring a high degree of calendering.
  • One aim of the present invention is to achieve a solution by means of which calendering can be carried out between two hard surfaces without the disadvantages relating to conventional machine calendering, such as relatively great variations in gloss and a decrease in bulk. These disadvantages are caused by the relatively high nip pressure used in machine calendering, which is typically of the order of approximately 100 MPa.
  • the method relating to the invention is characterised in that as a long-nip roll is used a roll, the mantle of which is made of metal, at least as concerns its calendering, longitudinal, central area; that in the method, a nip pressure within the range from about 0.1 MPa to about 50 MPa is directed at the material web W, and that the surface temperature of the rolls before the nip N is adjusted to a value from about 60°C to about 350°C.
  • the nip pressure is preferably within the range from about 0.2 MPa to about 15 MPa, and the surface temperature is preferably within the range from about 120°C to about 300°C.
  • the calender arrangement relating to the invention is in turn characterised in that the mantle of the long-nip roll is made of metal, at least as concerns its calendering, longitudinal, central area.
  • the calender arrangement relating to the invention comprises a shoe roll 15, in which on a stationary axle 16, at the nip N, is arranged a loading member 17, which comprises a shoe part 19 extending over the width of the nip (in the longitudinal direction of the roll), and the pistons 20 loading it.
  • a belt mantle 30 which is made of metal, at least in its calendering central area, as shown in Figure 2.
  • the central area of the belt mantle 30 is comprised of a steel belt 31, which extends over the length of the shoe 19, and to it are connected end sections 32 made of resilient material, which may be, for example, polymer, rubber, silicone, etc.
  • the end sections 32 are connected to the steel belt 31 in a flexible manner, for example, by glueing or curing. The connection is made at a point outside the shoe part 19 to avoid directing a fatiguing load on the steel belt.
  • the steel belt 30 can also be made completely of metal, for example, by providing the end sections of the belt mantle with elastic sealing rings, which are fitted to rotate with the said mantle, as described in Finnish patent no. 66932.
  • Figure 3 shows a solution in which a thin-walled metal cylinder 41 is fitted over the polymer belt 40 of a shoe roll 15, the cylinder being tightened in place by means of the internal air pressure of the roll.
  • the length of the cylinder 41 is the same as the width of the material web and it is not fixed to the end structures of the shoe roll, whereby loading causing fatigue in metal materials is avoided in the edge area of the shoe.
  • a long nip N Between the long-nip roll 15 and its heated, metal-surfaced backing roll 11 is formed a long nip N, through which the material web W is guided, in order to calender it.
  • a nip pressure which is within the range from about 0.1 to about 50 MPa, preferably within the range from about 0.2 to about 15 MPa, which is considerably less than the pressure used in normal machine calendering, which is of the order of 100 MPa.
  • the surface temperature of the rolls before the nip N is adjusted to a value from about 60°C to about 350°C, and preferably to a value from about 120°C to about 300°C, when the surface temperature used in conventional machine calendering is typically within the range from about 60°C to about 120°C.
  • the length of the nip N in the direction of travel of the material web is preferably within the range from about 10 mm to about 500 mm.
  • the surface roughness R a of both the steel belt 30 of the long-nip roll 15 and of the outer surface of the backing roll 11 is preferably less than 0.3 ⁇ m, whereby the material web W can be subjected to gloss treatment.
  • the solution relating to the invention is applicable to both on-line use and off-line use. It is conceivable to use the calender arrangement relating to the invention, for example, on the press section for drying the material web, for pre-calendering before the coating machine and for final calendering after the coating machine.
  • the paper machine When using the apparatus relating to the invention in the dryer section of a paper machine, the paper machine can be shortened by leaving a part of the drying cylinder out.

Claims (10)

  1. Procédé pour calandrer une bande de matériau (W), spécialement une bande de papier ou une bande de carton, dans une calandre à longue ligne de contact , dans lequel le rouleau d'appui (11) du rouleau à longue ligne de contact (15) est un rouleau chauffé, dans lequel cas la longueur de la ligne de contact (N) dans la direction du déplacement de la bande de matériau (W) est à l'intérieur de la plage d'approximativement de 70 mm à 270 mm, caractérisé en ce que comme rouleau à longue ligne de contact (15) est utilisé un rouleau, dont le revêtement (30) est constitué de métal au moins en ce qui concerne le calandrage, de la zone centrale longitudinale (31) ; en ce que dans le procédé, une pression de ligne de contact à l'intérieur de la plage d'environ 0,1 MPa à environ 50 MPa est dirigée vers la bande de matériau (W), et en ce que la température des rouleaux (11,15) avant la ligne de contact (N) est ajustée à une valeur d'environ 60 °C à environ 350 °C.
  2. Procédé selon la revendication 1, caractérisé en ce que la pression de la ligne de contact est à l'intérieur de la plage d'environ 0,2 Mpa à environ 15 MPa, et en ce que la température de surface des rouleaux avant la ligne de contact (N) est à l'intérieur de la plage d'environ 120 °C à environ 300 °C.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que dans le procédé sont utilisés des rouleaux (11,15), dont la rugosité en surface Ra de la surface extérieure du revêtement est inférieure à 0,3 micromètres.
  4. Procédé selon l'une quelconque des revendications ci-dessus, caractérisé en ce que dans le procédé est utilisé un rouleau à longue ligne de contact (15), dont le revêtement de la courroie (30) est totalement constitué de métal.
  5. Agencement de calandre pour calandrer une bande de matériau (W), de préférence une bande de papier ou une bande de carton, l'agencement comprenant une calandre à longue de ligne de contact, dans lequel le rouleau d'appui du rouleau à longue ligne de contact (15) et un rouleau à surface métallique chauffée (11), dont les rouleaux (11,15) forment une longue de ligne de contact (N) entre eux, la longueur de la ligne de contact dans la direction du déplacement de la bande de matériau (W) étant à l'intérieur de la plage d'approximativement de 70 mm à 270 m, caractérisé en ce que le revêtement (30) du rouleau à longue ligne de contact (15) est constitué de métal au moins en ce qui concerne le calandrage de la zone centrale longitudinale (31).
  6. Agencement de calandre selon la revendication 5, caractérisé en ce que la zone centrale du revêtement de courroie (30) est constituée d'une courroie d'acier (31), sur les bords de laquelle seront connectés de manière flexible des sections d'extrémité (32) constituées d'un matériau non-métallique résilient.
  7. Agencement de calandre selon la revendication 6, caractérisé en ce que les sections d'extrémité (32) sont connectées à la courroie d'acier par collage ou durcissement.
  8. Agencement de calandre selon la revendication 5, caractérisé en ce que le revêtement de la courroie (30) est totalement constitué de métal.
  9. Agencement de calandre pour calandrer une bande de matériau (W), de préférence une bande de papier ou une bande de carton, ledit agencement comprenant une calandre à longue de ligne de contact, dans lequel le rouleau d'appui du rouleau à longue ligne de contact (15) est un rouleau à surface métallique chauffée (11), dont les rouleaux (11,15) forment une longue de ligne de contact (N) entre eux, la longueur de la ligne de contact dans la direction du déplacement de la bande de matériau (W) étant à l'intérieur de la plage d'approximativement 10 mm à 500 mm, caractérisé en ce que le revêtement (30) du rouleau à longue ligne de contact (15) est constitué d'une courroie (40) constitué de polymère, sur laquelle est ajusté un cylindre métallique à paroi mince (41) .
  10. Agencement de calandre selon la revendication 9, caractérisé en ce que le cylindre métallique (41) est serré de manière étanche en place au moyen de la pression de l'air interne du rouleau ou connecté par collage ou durcissement à la courroie de polymère (40) de façon à tourner avec celle-ci.
EP01969838A 2000-10-02 2001-09-21 Procede de calandrage d'une feuille continue et systeme associe comportant une calandre a grande longueur de contact Expired - Lifetime EP1330573B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20002170 2000-10-02
FI20002170A FI108556B (fi) 2000-05-03 2000-10-02 Menetelmä materiaalirainan kalanteroimiseksi sekä menetelmän toteuttava kalanterijärjestely
PCT/FI2001/000827 WO2002029159A1 (fr) 2000-10-02 2001-09-21 Procede de calandrage d'une feuille continue et systeme associe comportant une calandre a grande longueur de contact

Publications (2)

Publication Number Publication Date
EP1330573A1 EP1330573A1 (fr) 2003-07-30
EP1330573B1 true EP1330573B1 (fr) 2006-05-24

Family

ID=8559211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969838A Expired - Lifetime EP1330573B1 (fr) 2000-10-02 2001-09-21 Procede de calandrage d'une feuille continue et systeme associe comportant une calandre a grande longueur de contact

Country Status (6)

Country Link
EP (1) EP1330573B1 (fr)
JP (1) JP2004510897A (fr)
AT (1) ATE327376T1 (fr)
AU (1) AU2001289975A1 (fr)
DE (1) DE60119956T2 (fr)
WO (1) WO2002029159A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115731B (fi) * 2001-09-12 2005-06-30 Metso Paper Inc Menetelmä kuiturainan, erityisesti kartonkirainan valmistuksen yhteydessä ja konsepti kuiturainan, erityisesti kartongin valmistuksen yhteydessä
DE10232550C5 (de) * 2002-07-18 2013-02-07 Voith Patent Gmbh Vorrichtung und Verfahren zum Imprägnieren einer Papier- oder Kartonbahn
DE10239907A1 (de) * 2002-08-30 2004-03-18 Voith Paper Patent Gmbh Breitnipkalanderanordnung und Verfahren zum Satinieren einer Papier- oder Kartonbahn
FI120596B (fi) * 2003-03-07 2009-12-15 Metso Paper Inc Menetelmä paperin tai kartongin muokkaamiseksi
FI113881B (fi) * 2003-05-30 2004-06-30 Metso Paper Inc Hihnarakenne
DE10327673B4 (de) * 2003-06-20 2005-04-14 Voith Paper Patent Gmbh Verfahren zum Glätten einer Papier-oder Kartonbahn und Breitnip-Kalander
DE102004010894A1 (de) 2004-03-06 2005-09-22 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Bahn aus Papier oder Karton
DE102004062618A1 (de) 2004-12-24 2006-07-06 Voith Paper Patent Gmbh Glättanordnung
DE102006001021A1 (de) * 2006-01-07 2007-07-12 Voith Patent Gmbh Mattsatinage
DE102011007752A1 (de) 2011-04-20 2012-10-25 Voith Patent Gmbh Walze und Kalander mit dieser Walze

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204177C2 (de) * 1992-02-13 1995-07-06 Voith Gmbh J M Preßwalze
FI102305B1 (fi) * 1997-04-02 1998-11-13 Valmet Corp Kalanterointimenetelmä ja menetelmää soveltava kalanteri

Also Published As

Publication number Publication date
AU2001289975A1 (en) 2002-04-15
WO2002029159A1 (fr) 2002-04-11
EP1330573A1 (fr) 2003-07-30
DE60119956D1 (de) 2006-06-29
ATE327376T1 (de) 2006-06-15
DE60119956T2 (de) 2007-05-24
JP2004510897A (ja) 2004-04-08

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