EP2765237A1 - Procédé de production de bandes de fibres et ligne de fabrication de bandes de fibres - Google Patents

Procédé de production de bandes de fibres et ligne de fabrication de bandes de fibres Download PDF

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Publication number
EP2765237A1
EP2765237A1 EP13154162.5A EP13154162A EP2765237A1 EP 2765237 A1 EP2765237 A1 EP 2765237A1 EP 13154162 A EP13154162 A EP 13154162A EP 2765237 A1 EP2765237 A1 EP 2765237A1
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EP
European Patent Office
Prior art keywords
fiber web
web
cooling
calender
calendering
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.)
Granted
Application number
EP13154162.5A
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German (de)
English (en)
Other versions
EP2765237B1 (fr
Inventor
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
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Valmet Technologies Oy
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Application filed by Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to EP13154162.5A priority Critical patent/EP2765237B1/fr
Priority to DE201320011389 priority patent/DE202013011389U1/de
Publication of EP2765237A1 publication Critical patent/EP2765237A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/0073—Accessories for calenders
    • D21G1/0093—Web conditioning devices

Definitions

  • present invention relates to producing fiber webs in a fiber web production line. More especially the present invention relates to a method according to preamble part of claim 1 and to a production line according to preamble part of claim 9.
  • a typical production and treatment line comprises a head box, a wire section and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise other devices and/or sections for finishing the fiber web, for example a sizer, a pre-calender, a coating section, a final-calender and a reel-up.
  • the production and treatment line also comprises at least one slitter-winder for forming customer rolls as well as a roll packaging apparatus.
  • Pre-calendering is typically used for creating required surface properties for further treatment, for example for coating and final-calendering, which are generally carried out in order to improve the properties, like smoothness and gloss, of a web-like material such as a paper or board web.
  • a nip i.e. calendering nip
  • the web is passed into a nip, i.e. calendering nip, formed between rolls that are pressed against each other, in which nip the web becomes deformed as by the action of temperature, moisture and nip pressure.
  • the nips are formed between a smooth-surfaced press roll such as a metal roll and a roll coated with resilient material such as a polymer roll or between two smooth-surfaced rolls.
  • the resilient-surfaced roll adjusts itself to the forms of the web surface and presses the opposite side of the web evenly against the smooth-surfaced press roll.
  • the nips can be formed also by using instead one of roll a belt or a shoe as known from prior art.
  • Many different kinds of calenders to be used as a pre-calender and/or as an final-calender are known, for example hard nip calenders, soft nip calenders, supercalenders, metal belt calenders, shoe calenders, long nip calenders, multinip calenders etc.
  • the fiber web is guided from the drying section to a precalender, when the temperature of the fiber web is about 80 - 90 °C.
  • the middle layers of the web are hot and near plastic state, whereby during calendering the fiber web will compact also in the middle layers, which leads to unnecessary bulk loss.
  • a reel-up of the fiber web production line as a continuous web produced fiber web is reeled up into the form of a roll, a parent (machine, jumbo) roll.
  • the reeling is generally a first process part, wherein a continuous process is discontinued to be continued in sequences.
  • One problem in reeling after calendering is that the fiber web is still rather warm, typically in temperature range of 50 - 80 °C, and during reeling of warm fiber web reeling faults may occur, coating defects may be caused and brightness of the fiber web may reduce, which leads to the need of cooling devices located after calendering, for example as disclosed in WO publication 2006/000630 .
  • a method for drying a surface-treated paper web or equivalent in an after-dryer of a paper machine as well as a dryer section of a paper machine for applying the method, wherein, in view of compensating for a tendency of curl of the paper web, in the after-dryer the paper web is dried in a dryer group/groups making use of a normal single-wire draw, and that, in connection with or after the drying, the paper web is treated by means of a device/devices in order to compensate for a tendency of curl of the paper web, which devices are, for example, a steam box, a blower unit, a moisturizing device, and/or a soft calender.
  • devices are, for example, a steam box, a blower unit, a moisturizing device, and/or a soft calender.
  • WO 98/27273 is disclosed a method for drying of paper, which method the paper web to be dried is passed from the press section into a pre-dryer section and from the forward dryer section the paper web is passed into a finishing section, in which the paper web is coated/surface-sized by means of a coating/surface-sizing equipment, dried in an after-dryer section, after which the paper web is calendered in a calender and passed to a reeling station.
  • the curl of the paper web is controlled by means of elements and/or by means of assemblies and combinations formed out of said elements at least in the area of the finishing section.
  • a steam box located between the dryer section and a calender and that in order to intensify the condensation in connection with the steam feed a cooling cylinder with adjustable temperature is employed.
  • the object of the present invention is further development of the earlier solutions described above so that the curl of the fiber web can be controlled more efficiently with increased drying capacity and simultaneously provide a method for effectively calendering fiber webs in which high bulkiness is received with less raw stock and a production line for carrying out the method.
  • a further object of the present invention is to approach the above problems from a new point of view and to suggest novel solutions contrary to conventional modes of thinking.
  • a further object of the present invention is to create a compact way to combine curl control, web cooling and moisture control.
  • the production line according to the invention is mainly characterized by the features of the characterizing part of claim 9.
  • the curl of the fiber web is controlled by cooling the fiber web before calendering the fiber web in precalender and/or in another calender.
  • an optional cooling provided by additional, optional cooling means is provided before the final calender.
  • the cooling is two sided i.e. cooling is effected on both sides of the web.
  • the fiber web is cooled by cooling device before calendering of the fiber web in the precalender and/or before in another calender of the production line such that after cooling the fiber web is guided to the precalender or to the other calender and that dwell time between cooling and calendering, which is the time the fiber web run takes from the first point of the cooling or moistening device to the first calendering nip of the pre- or the other calender is at least 200 ms, preferably 200 - 5000 ms.
  • the temperature of the fiber web when entering the first calendering nip is 10 - 55°C, preferably 20 - 50 °C.
  • the temperature of the middle of the fiber web when entering the first calendering nip is 10 - 55 °C, preferably 20 - 50 °C.
  • the fiber web is moisturized by a moisturizing device before and/or after and/or during cooling in the cooling device for enhancing the cooling of the fiber web by evaporation.
  • the fiber web is reeled in a reel-up after the calendering in final calender such that the temperature of the web is not higher than 55 °C, preferably in temperature in the range of 20 - 50 °C and that if necessary the fiber web is cooled before the calendering.
  • the fiber web is cooled by contactless cooling effect by the cooling device.
  • the cooling device is for example an air borne cooling device or impingement cooling device.
  • the fiber web is cooled by contacting cooling effect by the cooling device.
  • the fiber web is cooled after drying before precalendering.
  • the cooling device provides for blowing or creating a flow of cooled gas, for example air.
  • the amount of cooling is controlled on each or on one side of the fiber web, advantageously moisturizing amount is controlled on each or on one side of the fiber web.
  • the production line comprises a board or paper machine with dryer section 10, a sizer 20 with an after dryer 30, an optional moisturizer 100, a precalender 40, a coater 50 with dryer 60, a calender 70, an optional web cooler 150 and a reel-up 80.
  • Typical speeds of fiber web production lines are for board 600 - 1000 m/min, for liner 1000 - 1400 m/min and for paper 1200 - 2000 m/min.
  • the temperature of the web coming out from dryer section 10 is typically 90 - 150 °C, often about 95 °C and its solids content is 92 - 96%.
  • curl control is typically done at dryer section 10 by running one drying cylinder row at lower temperature, which results as more or less one-sided drying. This may mean a significant capacity loss, since drying potential is not fully in use, if for example 10 - 20 drying cylinders are used at low temperature.
  • Hot fiber web is generally preferred in sizing, since it improves sizing agent penetration and rapid beginning of sizing agent drying.
  • the web temperature after drying in after dryer 30 of the sizer 20 is typically 85 - 90 °C.
  • the after dryer 30 of the sizer may optionally be followed by a moisturizer 100, where water spray is used in order to enhance gradient calendering in the precalender 40.
  • the amount of spray water added to the web is 1 - 3 g/m 2 .
  • the fiber web enters the precalender its' temperature is typically 60 - 90 °C. If in the precalendering short nip calendering is used it increases the web temperature only about 10 - 15 °C, thus the ingoing temperature of the web when entering the coater 50 is 80 - 90 °C.
  • the fiber web After coating in the coater 50 the fiber web is dried in a dryer 60, after which the temperature of the web is 70 - 120 °C. Before the reel-up 80 the web may optionally be cooled by a web cooler 150 in order to ensure low reeling temperature under 55 °C to ensure reeling quality.
  • the production line comprises a board or paper machine with dryer section 10, a sizer 20 with an after dryer 30, a cooling device, for example a web cooler 200 with optional moisturizer 100, a precalender 40, a coater 50 with dryer 60, a cooling device, for example a web cooler 200, a calender 70 and a reel-up 80.
  • the speeds of fiber web production line are for board 600 - 1000 m/min, for liner 1000 - 1400 m/min and for paper 1200 - 2000 m/min.
  • the temperature of the web coming out from dryer section 10 is 90 - 150 °C, preferably about 95 °C and the solids content of the fiber web is 92 - 96%.
  • the curl control is done by the web cooler 200 located before the precalender 40 thus at dryer section 10 all drying cylinders may be run at high drying temperature and thus fully utilizing all drying cylinders. This means a significant capacity increase, since drying potential is fully in use.
  • Hot fiber web preferred in sizing improves sizing agent penetration and rapid beginning of sizing agent drying.
  • the web temperature after drying in after dryer 30 of the sizer 20 is typically 85 - 90 °C.
  • the after dryer 30 of the sizer 20 is followed for curl control of the fiber web by a web cooler 200 with an optional moisturizer 100.
  • the fiber web is effectively cooled to temperature 35 - 55 °C.
  • the cooling is preferably evaporative cooling, which enhances the cooling.
  • a moisturizer 100 is used, in which water sprays further enhance cooling rate and to adjust web moisture before precalendering.
  • the web chilling and spray moisturizing is done on both sides of the web and two-sidedness is adjusted to control the curling.
  • the cooling effect of the web cooler 200 is 30 - 50 °C.
  • low ingoing temperature 30 - 50 °C to the precalender 40 is achieved, by which bulk savings are provided, in particular in case of short nip precalendering either hard or soft nip calendering.
  • Advantageously web moisture is adjusted to suitable level, for example 6 - 10 %.
  • precalender 40 an effective moisture and temperature gradient precalendering takes place.
  • short nip calendering increases the web temperature only about 10 - 15 °C, thus the ingoing temperature of the web when entering the coater 50 is 45 - 60 °C.
  • the fiber web is dried in a dryer 60, after which the temperature of the web is 70 - 120 °C.
  • the fiber web is advantageously cooled by a cooling device, for example a web cooler 200.
  • the web cooler 200 is a contact cooler or air flotation cooler.
  • the ingoing temperature of the fiber web is reduced to 30 - 55 °C and further bulk savings are achieved.
  • the temperature of the fiber web after calendering is also lower 50 - 55 °C and the low temperature needed in reeling in the reel-up 80 is provided without further cooling devices as the temperature of the fiber web is 50 - 55 °C after calendering.
  • the fiber web W is guided from the paper or board machine with dryer section 10 prior to the calendering in a calender 70 to an optional moisturizing device 100 and thereafter to cooling device 200, which is followed by an optional moisturizing device 100.
  • the fiber web is guided reeling in a reel-up 80.
  • the fiber web W to be produced is uncoated and the production line is provided with two sided cooling with the cooling device 200 and the curl control of the fiber web W is done two sided by the moisturizing sprays of the moisturizing devices 100 and chilling blows of the cooling device 200.
  • the fiber web W is guided from the paper of board machine with dryer section 10 prior to the precalendering in a precalender 40 to an optional moisturizing device 100 and thereafter to cooling device 200.
  • Precalendering is followed by coating of the fiber web W in a coater 50 with dryer 60.
  • After coating the fiber web W can optionally be cooled by a cooling device 200 before the final calendering in a calender 70.
  • the calendering of the fiber web W is followed by reeling in a reel-up 80.
  • the fiber web W to be produced is coated and the curl control of the fiber web W is done two sided by the optional moisturizing sprays of the moisturizing devices 100 and by chilling blows of the cooling device 200.
  • the fiber web W is guided from the paper of board machine with dryer section 10 to be sized in a sizer 20. After sizing the fiber web is dried in a dryer 30 and prior to the calendering in a calender 70 the fiber web W is guided to an optional moisturizing device 100 and thereafter to cooling device 200. The calendering of the fiber web W is followed by reeling in a reel-up 80. In this example the fiber web W to be produced is uncoated and the curl control of the fiber web W is done two sided by the optional moisturizing sprays of the moisturizing devices 100 and by chilling blows of the cooling device 200.
  • the fiber web W is guided from the paper of board machine with dryer section 10 to be sized in a sizer 20. After sizing the fiber web is dried in a dryer 30 and prior to the precalendering in a precalender 40 the fiber web W is guided to an optional moisturizing device 100 and thereafter to cooling device 200. Precalendering is followed by coating of the fiber web W in a coater 50 with dryer 60. After coating the fiber web W can optionally be cooled by a cooling device 200 before the final calendering in a calender 70. The calendering of the fiber web W is followed by reeling in a reel-up 80. In this example the fiber web W to be produced is coated and the curl control of the fiber web W is done two sided by the optional moisturizing sprays of the moisturizing devices 100 and by chilling blows of the cooling device 200.
  • FIG 7 is schematically shown various configurations for moisturizing devices 100 and cooling devices 200 in fiber web production line examples in accordance with advantageous examples of the invention.
  • the moisturizing devices 100 are optional and can be located either separate from or in connection with the cooling devices 200.
  • the moisturizing devices 100 and the cooling devices 200 are located two sided in respect of the fiber web W so that the curl control, when needed, can be effected to both sides of the fiber web W.
  • FIGS 8 - 10 is schematically shown various configurations for moisturizing devices 100 and cooling devices 200 in fiber web production line examples in accordance with advantageous examples of the invention.
  • the moisturizing devices 100 are optional and can be located either separate from or in connection with the cooling devices 200.
  • the moisturizing devices 100 and the cooling devices 200 are located two sided in respect of the fiber web W so that the curl control, when needed, can be effected to both sides of the fiber web W.
  • FIG. 8 - 10 is also shown some configurations to provide a long influencing time for the cooling before calendering 40; 70.
  • the fiber web is guided to an extended run by guide elements 125 that guide the fiber web W to an extended run via the basement level of the fiber web production hall.
  • dashed line F is indicated the floor lever of the main fiber web production hall.
  • cooling devices 200 and optional moisturizing devices 100 can be located.
  • the fiber web is guided to an extended run by guide elements 125 that guide the fiber web W to an extended run via the upper parts above the main production line of the fiber web production hall.
  • dashed line F is indicated the floor lever of the main fiber web production hall.
  • cooling devices 200 and optional moisturizing devices 100 can be located.
  • the fiber web is guided to an extended run by guide elements 125 that guide the fiber web W to an extended run meandering via the upper parts and lower parts of the main production line in the fiber web production hall.
  • guide elements 125 that guide the fiber web W to an extended run meandering via the upper parts and lower parts of the main production line in the fiber web production hall.
  • optional moisturizing devices 100 can be located.
  • the cooling is provided by open web draws and optionally for example the first two guide elements 125 may be cooled rolls or turn elements.
  • the optional cooling devices may be located before or during the meandering extended run of the fiber web W before to the calender 40; 70.

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EP13154162.5A 2013-02-06 2013-02-06 Procédé de production d'une bande de fibres et ligne de fabrication d'une bande de fibres Active EP2765237B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13154162.5A EP2765237B1 (fr) 2013-02-06 2013-02-06 Procédé de production d'une bande de fibres et ligne de fabrication d'une bande de fibres
DE201320011389 DE202013011389U1 (de) 2013-02-06 2013-12-20 Herstelllinie für das Herstellen von Faserbahnen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13154162.5A EP2765237B1 (fr) 2013-02-06 2013-02-06 Procédé de production d'une bande de fibres et ligne de fabrication d'une bande de fibres

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EP2765237A1 true EP2765237A1 (fr) 2014-08-13
EP2765237B1 EP2765237B1 (fr) 2016-11-23

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DE (1) DE202013011389U1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3012371A1 (fr) * 2014-10-21 2016-04-27 Valmet Technologies, Inc. Procédé de traitement d'une bande de matière fibreuse et calandre de pour traiter une bande de matière fibreuse
EP3231937B1 (fr) * 2016-04-11 2022-08-31 Valmet Technologies Oy Ligne de production de bandes de fibres et refroidisseur
EP3577272A1 (fr) * 2017-02-03 2019-12-11 Voith Patent GmbH Traitement de bande continue
CN110446811B (zh) * 2017-03-21 2021-06-04 福伊特专利有限公司 幅面处理
DE202017103448U1 (de) * 2017-06-08 2017-07-03 Valmet Technologies Oy Vorrichtung zum Kühlen einer Faserbahn
DE102017130071A1 (de) * 2017-12-15 2019-06-19 Voith Patent Gmbh Bahnbehandlung
DE102018106322A1 (de) * 2018-03-19 2019-09-19 Voith Patent Gmbh Kühl-Behandlung

Citations (9)

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Publication number Priority date Publication date Assignee Title
WO1998027273A1 (fr) 1996-12-03 1998-06-25 Valmet Corporation Procede de sechage et du papier et section seche d'une machine a papier
WO2000017446A1 (fr) * 1998-09-22 2000-03-30 International Paper Company Procede et appareil de finissage de carton pour lui donner un lisse et une densite de volume ameliores
EP1015689A1 (fr) 1996-09-20 2000-07-05 Valmet Corporation Procede de sechage d'une bande de papier ou analogue, soumis a un traitement de surface, dans une post-secherie et post-secherie permettant d'appliquer ledit procede dans une machine a papier
WO2002103109A1 (fr) * 2001-06-18 2002-12-27 Metso Paper, Inc. Procede, machine a papier et papier de base pour la fabrication de papier impression couche leger (lwc) recouvert une seule fois
EP1486610A1 (fr) * 2003-06-13 2004-12-15 Voith Paper Patent GmbH Dispositif pour la fabrication et/ou le traitement d'une bande de matériau fibreux
WO2005042837A1 (fr) * 2003-11-03 2005-05-12 Metso Paper, Inc Procede de precalandrage et chaine de traitement pour papier
EP1541759A1 (fr) * 2003-12-12 2005-06-15 Voith Paper Patent GmbH Procédé de traitement d'une bande de papier
WO2006000630A1 (fr) 2004-06-29 2006-01-05 Metso Paper, Inc. Procede et dispositif permettant de refroidir une nappe fibreuse
DE102005053968A1 (de) 2005-11-11 2007-05-16 Voith Patent Gmbh Glättung

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FI72768B (fi) 1984-11-30 1987-03-31 Waertsilae Oy Ab Nerkylning av pappersbana i superkalander.
DE3815463A1 (de) 1988-05-06 1989-11-16 Kuesters Eduard Maschf Verfahren zur erzeugung von glaette und glanz auf einer papierbahn und entsprechende kalanderanordnung
FI971301A (fi) 1997-03-27 1998-09-28 Valmet Corp Menetelmä paperin käyristymän hallitsemiseksi paperikoneen kuivatusosalla ja paperi- tai kartonkikone
CA2309656C (fr) 1997-11-14 2008-04-29 Valmet Corporation Procede de production de papier calandre
DE19826899B4 (de) 1998-05-08 2005-05-19 V.I.B. Systems Gmbh Verfahren und Vorrichtung zur Online-Kalandrierung von SC-A-Papier

Patent Citations (9)

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Publication number Priority date Publication date Assignee Title
EP1015689A1 (fr) 1996-09-20 2000-07-05 Valmet Corporation Procede de sechage d'une bande de papier ou analogue, soumis a un traitement de surface, dans une post-secherie et post-secherie permettant d'appliquer ledit procede dans une machine a papier
WO1998027273A1 (fr) 1996-12-03 1998-06-25 Valmet Corporation Procede de sechage et du papier et section seche d'une machine a papier
WO2000017446A1 (fr) * 1998-09-22 2000-03-30 International Paper Company Procede et appareil de finissage de carton pour lui donner un lisse et une densite de volume ameliores
WO2002103109A1 (fr) * 2001-06-18 2002-12-27 Metso Paper, Inc. Procede, machine a papier et papier de base pour la fabrication de papier impression couche leger (lwc) recouvert une seule fois
EP1486610A1 (fr) * 2003-06-13 2004-12-15 Voith Paper Patent GmbH Dispositif pour la fabrication et/ou le traitement d'une bande de matériau fibreux
WO2005042837A1 (fr) * 2003-11-03 2005-05-12 Metso Paper, Inc Procede de precalandrage et chaine de traitement pour papier
EP1541759A1 (fr) * 2003-12-12 2005-06-15 Voith Paper Patent GmbH Procédé de traitement d'une bande de papier
WO2006000630A1 (fr) 2004-06-29 2006-01-05 Metso Paper, Inc. Procede et dispositif permettant de refroidir une nappe fibreuse
DE102005053968A1 (de) 2005-11-11 2007-05-16 Voith Patent Gmbh Glättung

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Publication number Publication date
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