EP1609906B1 - Procédé pour le satinage d'une bande de papier - Google Patents

Procédé pour le satinage d'une bande de papier Download PDF

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Publication number
EP1609906B1
EP1609906B1 EP05100484A EP05100484A EP1609906B1 EP 1609906 B1 EP1609906 B1 EP 1609906B1 EP 05100484 A EP05100484 A EP 05100484A EP 05100484 A EP05100484 A EP 05100484A EP 1609906 B1 EP1609906 B1 EP 1609906B1
Authority
EP
European Patent Office
Prior art keywords
paper web
calender
roller
calendering
hard
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 - Fee Related
Application number
EP05100484A
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German (de)
English (en)
Other versions
EP1609906A1 (fr
Inventor
Dirk Cramer
Josef Kohnen
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
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Filing date
Publication date
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Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1609906A1 publication Critical patent/EP1609906A1/fr
Application granted granted Critical
Publication of EP1609906B1 publication Critical patent/EP1609906B1/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

Definitions

  • the invention relates to a method for calendering a paper web, which is rolled up after drying taking place at the end of a production section, transported to an off-line calender, unwound there and fed through the calender.
  • Such a method is used in particular in the production of higher quality papers, namely SC-A papers or even SC-A-Plus papers, where the quality of the surface high demands are made.
  • SC-A papers or even SC-A-Plus papers where the quality of the surface high demands are made.
  • SC-A-Plus papers where the quality of the surface high demands are made.
  • off-line calenders with a relatively large number of rolls of at least ten rolls are still used today. Since the off-line calenders usually work somewhat slower than the paper machine supplying them, in many cases two off-line calenders are provided for a paper machine. In contrast, SC-B papers are usually produced on-line, ie the paper web is driven through a 2 ⁇ 2-roll soft calender before being rolled up. With such a procedure, however, the desired surface quality for SC-A or SC-A-Plus papers can not be achieved.
  • the off-line calenders must be adjusted accordingly to follow production. As a rule, one also tries to increase their production speed. However, an increase in speed results in reaching the quality goals, e.g. Smoothness, the line load and / or the surface temperature of the heated rolls must be increased. However, this change in operating parameters can have negative effects. For example, a higher black satin result.
  • Another measure is to increase the number of rolls to, for example, 12 rolls. This increases the cost of manufacturing and operating the calender.
  • the WO 01/32982 A describes a papermaking process in a paper machine in which the web after one-sided drying first passes through a one-sided acting inline calender and then another, one-sided calender, which can also stand off-line. Only one side of the web comes into contact with the hard roller.
  • the EP-A-0726353 describes the treatment of a paper web online with a double-acting SoftKalander or alternatively with a multi-roll calender following an off-line coating machine.
  • the invention has for its object to adjust the calendering in an off-line calender to increasing paper machine speeds.
  • the object is achieved in the method of the type mentioned in that the paper web between the drying and the rolling in a at least two limited by a respective hard roll nips calendering unit is prescreened, wherein one and then the other side of the paper web on the hard roll and wherein the off-line calender has a Komnip.
  • the paper web is calendered on-line before being rolled up, so that it already has a certain degree of smoothness.
  • This smoothness is no longer lost in the intermediate storage of the paper web on the spool, ie the web enters with an increased smoothness in the off-line calender. Accordingly, even with production parameters of the off-line calender intended for a lower calender speed, one can achieve a satisfactory end result of the calender.
  • the speed of the off-line calender can be increased by pre-calendering in the on-line calendering unit and thus adapted to an increasing speed of the paper machine, without having to accept a deterioration of the surface quality or other disadvantages, such as black satin , Ideally, even a quality improvement is possible.
  • At least one nip-limiting roller is heated to a surface temperature in the range of 60 to 300 ° C.
  • the heating has the advantage that the paper web can be smoothed more easily in the calendering unit. Despite the relatively high temperatures, an excessively large supply of energy at this point is not necessary because the paper web already has a relatively high temperature due to the pre-dying drying. The pre-inking is thus energy-saving.
  • the paper web is loaded in the nip with a line load of a maximum of 1,000 N / mm.
  • the line load is of course chosen depending on the desired result.
  • the paper web is moistened after passing through the calendering device and before rolling up. If the paper web in the calendering unit is subjected not only to increased pressure but also to elevated temperature, then it loses moisture. This moisture loss is compensated by the humidification, so that a sufficiently moist paper web can be rolled up.
  • the moistening does not even have to be overly uniform.
  • the paper web is rolled up on a spool and remains there temporarily for at least a time required to transport the full spool from the exit of the paper machine to the off-line calender. This time is sufficient for a certain moisture balance of the rolled-up paper web. It can not be ruled out that the railway after that they described in the Were moistened in the pre-calender unit, even in the offline calender is moistened again, if it should be necessary.
  • the paper web is calibrated in the calendering unit. This has considerable advantages when rolling up the paper web. The winding quality increases, since the paper web is not only precalendered, but also profile-corrected.
  • At least two soft nips which are each formed by a soft and a hard roller, two hard nips, which are each formed by two hard rollers, two broad nips, each by a shoe roll and a roller are formed, or a combination of at least two of these types of nip used.
  • the term "hard" roller and "soft” roller is to be understood here relative.
  • a soft roll has a surface that is softer than the surface of a hard roll.
  • a surface covering of an elastomeric plastic is used.
  • With a soft nip can be a better smoothness produce.
  • With a hard nip can produce a better profile correction.
  • a soft-nip allows smoothing with a relatively low volume loss. The person skilled in the art will be able to easily find out the appropriate nip type, taking into account the given boundary conditions.
  • the paper web is moistened before entering the calendering unit and / or when passing through the calendering unit. This is no longer dependent on the paper web after drying has exactly the target moisture required for presaturation. By adding moisture during presetting, the smoothness on the surface of the paper web can generally be increased.
  • the two-sidedness of the paper web in the calendering unit is reduced to a predetermined extent. In this case, you do not have to pay much attention to the two-sided off-line calender. In this case, for example, it may be possible to equalize the number of nips before and after the changeover tip in the off-line calender and thus reduce the number of rolls as a whole.
  • rollers of the same type as in the off-line calender in the calendering unit.
  • reserve rolls can be shared in the calendering unit and in the off-line calender, which helps to reduce inventory and thus costs.
  • a paper web 1 which is produced in a paper machine 2 shown only schematically and dried in a drying group 3, is, if it is of higher quality Paper, such as SC-A or SC-A-Plus paper, rolled in a reel 4 on a spool 5.
  • the spool 5 is then, as shown by a dashed transport path 6, transported to a settlement 7.
  • the paper web 1 is unwound from the drum 5 and passed through a calender 8, which has ten rollers 9 to 18 in the present case.
  • the upper roller 9 and the lower roller 18 are formed as elastic rollers.
  • the intermediate rollers 11, 13, 14 and 16 are formed as elastic rollers, which are also referred to as soft rollers. They have a coating 19 made of a plastic.
  • a so-called soft nip 20 is formed between each of a soft roller 9, 11, 13, 14, 16, 18 and a hard roller 10, 12, 15, 17, a so-called soft nip 20 is formed. Between the two soft rollers 13, 14, a switchover tip is formed. Before passing through the replacement tip, the underside of the paper web 1 bears against a hard roller. After passing through the switching chip 21, the upper side of the paper web 1 rests against a hard roller, so that smoothing on both sides can be achieved.
  • the calender 8 is slower than the paper machine 2, ie it operates at a lower speed. In addition, time losses are caused by the insertion of the spool in the unwinding 7 and the removal of a spool from the reel 22. Accordingly, two calenders 8 are provided for a paper machine 2 in the rule.
  • the calender 8 would not be sufficient with otherwise unchanged working speeds of the calender 8. To avoid a third calender, therefore, the operating speed of the calender 8 must be increased. However, this has the consequence that in order to achieve the quality objectives, such as roughness and smoothness, the line load and / or the surface temperature of the heated, hard rolls 10, 12, 15, 17 must be increased. However, this can result in other disadvantages, for example a higher black satin.
  • An alternative is to increase the number of rolls in calender 8 from ten to twelve.
  • a calendering unit 23 is now arranged between the drying group 3 of the paper machine 2 and the reel 4, which in the present case has two roll stacks 24, 25, each with two rolls.
  • Each roll stack has a soft roll 26, 28 and a hard, heated roll 27, 29, wherein the paper web is passed through the two roll stacks 24, 25, that first the top of the hard roll 27 and then the bottom of the hard Rolls 29 abuts.
  • the order of the rollers can be reversed.
  • the paper web 1 is subjected to line loads of 10 to 1000 N / mm. This will pre-saturate or pre-smooth.
  • the calibration can be effected especially if in one of the roll stacks 24, 25 a soft roll 26, 28 is replaced by a hard roller, not shown.
  • the hard roll, not shown, may be a Nipco or Nipcorect roll.
  • external means such as an induction heater.
  • the calendering unit 23 is followed by a Nachfeuchtungsmaschine 30, which rewet the paper web 1, if necessary.
  • the paper web usually loses some moisture in the calendering unit 23, so that for optimal conditions in the calender 8 a moisture increase should be made.
  • a moistening device 31 is arranged, which wets the paper web 1 coming from the drying group 3 of the paper machine 2 and provided with a relatively high temperature.
  • moistening devices may also be present in the calendering unit 23, even if this is not shown in detail.
  • the heated, hard rollers 27, 29 in the calendering unit can be operated at surface temperatures in the range of 60 to 300 ° C.
  • the illustrated soft nips can, as already mentioned above
  • one or more hard nips or a nip formed by a roller and a shoe roll may be used.
  • the soft rolls 26, 28 may be formed identically to the two end rolls 9, 18 of the calender 8.
  • the calendering conditions in the off-line calender 8 remain moderate or may even be reduced.
  • the correction of the two-sidedness can already take place in the calendering unit 23, that is to say on-line, so that one no longer has to pay much attention to this point when passing through the calender 8.
  • the winding quality in the reel 4 increases because the paper web 1 is already precalendered and profile corrected. Reserve rolls can be shared in the calender 8 and in the calendering unit 23.

Landscapes

  • Paper (AREA)

Claims (9)

  1. Procédé pour satiner une nappe de papier (1) qui est enroulée à la fin d'un séchage qui réalise un tronçon de production, est transportée sur une calandre (8) hors ligne pour y être enroulée et guidée par la calandre (8),
    caractérisé en ce que
    la nappe de papier (1) est pré-satinée entre le séchage et l'enroulement dans une unité de calandrage (23) qui présente au moins deux interstices délimités chacun par un cylindre dur (27, 29), un côté de la nappe de papier et ensuite l'autre côté de la nappe de papier reposant sur les cylindres durs (27, 29), la calandre (8) hors ligne présentant un interstice d'échange (21).
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins un cylindre (27, 29) qui délimite l'interstice est chauffé à une température de surface comprise dans la plage de 60 à 300°C.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que la nappe de papier (1) subit dans l'interstice une charge de traction d'au plus 1 000 N/mm.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la nappe de papier (1) est humidifiée après avoir traversé le dispositif de calandrage (23) et avant d'être enroulée.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que la nappe de papier (1) est pré-calibrée dans l'unité de calandrage (23).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que deux interstices mous formés chacun par un cylindre mou et un cylindre dur (26, 27; 28, 29), deux interstices durs formés par deux cylindres durs, deux interstices larges formés chacun par un cylindre de sabot et un cylindre ou une combinaison d'au moins deux de ces types d'interstices sont utilisés dans l'unité de calandrage (23).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'avant d'entrer dans l'unité de calandrage (23) et/ou pendant qu'elle traverse l'unité de calandrage (23), la nappe de papier (1) est humidifiée.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que dans l'unité de calandrage (23), la différence entre les faces de la nappe de papier (1) est diminuée à une valeur prédéterminée.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que des cylindres de même structure que dans la calandre (8) hors ligne sont utilisés dans l'unité de calandrage (23).
EP05100484A 2004-04-24 2005-01-26 Procédé pour le satinage d'une bande de papier Expired - Fee Related EP1609906B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004020069A DE102004020069C5 (de) 2004-04-24 2004-04-24 Verfahren zum Satinieren einer Papierbahn
DE102004020069 2004-04-24

Publications (2)

Publication Number Publication Date
EP1609906A1 EP1609906A1 (fr) 2005-12-28
EP1609906B1 true EP1609906B1 (fr) 2010-03-24

Family

ID=34938575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05100484A Expired - Fee Related EP1609906B1 (fr) 2004-04-24 2005-01-26 Procédé pour le satinage d'une bande de papier

Country Status (3)

Country Link
US (1) US7655114B2 (fr)
EP (1) EP1609906B1 (fr)
DE (2) DE102004020069C5 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009028511A1 (de) * 2009-08-13 2011-02-17 Voith Patent Gmbh Verfahren und Vorrichtung zur Papierherstellung

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775300A (en) * 1954-01-27 1957-05-22 Smyth Horne Ltd Paper moistening device for paper making machines
US5251551A (en) * 1988-09-29 1993-10-12 Jujo Paper Co., Ltd. Calendering apparatus for paper making process
DE4037166C1 (en) * 1990-11-22 1991-12-19 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De Regulation of web width in paper machine - with calendering rolls comprising flexible roll and heating roll, and edge catches at sides in wire section
JPH07258992A (ja) * 1994-03-17 1995-10-09 Nippon Paper Ind Co Ltd 製紙用カレンダ装置
DE4412624C2 (de) * 1994-04-13 1998-04-09 Kleinewefers Gmbh Verfahren und Vorrichtung zur Behandlung einer Materialbahn
DE9414963U1 (de) * 1994-09-16 1994-11-03 Voith Gmbh J M Trockenpartie
FI98387C (fi) 1995-02-01 1997-06-10 Valmet Corp Menetelmä pintakäsiteltävän paperin, etenkin hienopaperin, valmistamiseksi sekä paperikoneen kuivapää
FI108061B (fi) * 1995-10-05 2001-11-15 Metso Paper Inc Menetelmä liikkuvan paperi- tai kartonkirainan päällystämiseksi
DE19715345A1 (de) * 1997-03-27 1998-10-01 Voith Sulzer Papiermasch Gmbh Verfahren zur Herstellung einer gestrichenen Warenbahn, insbesondere aus Papier oder Karton
US6038789A (en) * 1997-05-15 2000-03-21 Valmet Corporation Method for controlling the curl of paper and a paper or board machine line that applies the method
US6254725B1 (en) * 1997-06-20 2001-07-03 Consolidated Papers, Inc. High bulk paper
FI115649B (fi) * 1998-06-10 2005-06-15 Metso Paper Inc Menetelmä paperin valmistamiseksi ja paperikone
FI104745B (fi) * 1998-06-25 2000-03-31 Valmet Corp Menetelmä ja sovitelma paperin ja kartongin kalanteroimiseksi
WO2000003088A1 (fr) * 1998-07-10 2000-01-20 Valmet Corporation Procede et appareil de fabrication de papier calandre
US6500305B1 (en) * 1998-08-08 2002-12-31 V. I. B. Apparatebau Gmbh Process and apparatus for the on-line calendering of SC-A paper
FI991096A (fi) * 1999-05-12 2000-11-13 Valmet Corp Menetelmä paperin, erityisesti hienopaperin, valmistamiseksi ja paperi konelinja erityisesti hienopaperin valmistamista varten
NZ517770A (en) 1999-10-22 2003-11-28 Aventis Cropscience S Process for preparing 4- trifluoromethylsulphinylpyrazole derivative
FI112965B (fi) * 1999-11-05 2004-02-13 Metso Paper Inc Kalanterointisovitelma paperikonetta varten
FI115405B (fi) * 2000-06-20 2005-04-29 Metso Paper Inc Kalanterointimenetelmä erityisesti esikalanterointia varten ja paperin käsittelylinja
DE10110309C2 (de) * 2001-03-03 2003-01-16 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Papierbahn
DE10205220A1 (de) * 2002-02-08 2003-08-21 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Herstellung und Behandlung einer Materialbahn
DE10206333C1 (de) * 2002-02-14 2003-07-31 Voith Paper Patent Gmbh Breitnip-Kalander-Anordnung und Verfahren zum Satinieren einer Papier- oder Karrtonbahn

Also Published As

Publication number Publication date
EP1609906A1 (fr) 2005-12-28
DE102004020069A1 (de) 2005-11-17
US20050235840A1 (en) 2005-10-27
DE102004020069B4 (de) 2007-04-12
DE102004020069C5 (de) 2013-12-05
DE502005009265D1 (de) 2010-05-06
US7655114B2 (en) 2010-02-02

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