EP0957202A2 - Procédé et dispositif pour la fabrication de papier SC-A online - Google Patents

Procédé et dispositif pour la fabrication de papier SC-A online Download PDF

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Publication number
EP0957202A2
EP0957202A2 EP99100989A EP99100989A EP0957202A2 EP 0957202 A2 EP0957202 A2 EP 0957202A2 EP 99100989 A EP99100989 A EP 99100989A EP 99100989 A EP99100989 A EP 99100989A EP 0957202 A2 EP0957202 A2 EP 0957202A2
Authority
EP
European Patent Office
Prior art keywords
paper web
steam
supercalender
paper
nip
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
EP99100989A
Other languages
German (de)
English (en)
Other versions
EP0957202B1 (fr
EP0957202A3 (fr
Inventor
Stefan Winheim
Rudolf Dr. Mann
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.)
VIB Apparatebau GmbH
Original Assignee
VIB Apparatebau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19826899A external-priority patent/DE19826899B4/de
Application filed by VIB Apparatebau GmbH filed Critical VIB Apparatebau GmbH
Publication of EP0957202A2 publication Critical patent/EP0957202A2/fr
Publication of EP0957202A3 publication Critical patent/EP0957202A3/fr
Application granted granted Critical
Publication of EP0957202B1 publication Critical patent/EP0957202B1/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
    • D21G1/0073—Accessories for calenders
    • D21G1/0093—Web conditioning devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/008—Steam showers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G7/00—Damping devices

Definitions

  • the invention relates to a method for producing SC-A paper with high gloss and high smoothness, which from the Paper machine coming paper online a super calender (Multinip soft calender) is fed, in which it is used Achievement of the desired gloss and smoothness properties Variety of nips passes through, as well as a device to carry out this procedure.
  • a super calender Multinip soft calender
  • Gloss and smoothness are characteristics of a paper web that are not only their appearance, but also their further processability influence. For certain applications, gloss and / or Smoothness values are desired that are reproducible as evenly as possible should be.
  • the gloss and smoothness of the paper web are common thereby increased that the paper web following the Drying section of the paper machine consisting of a smoothing unit passes through one or more nips, the gloss and / or the smoothness of the paper web by the pressure in the Nip and the temperature of the nip forming the nip rolling is increased.
  • Supercalenders have a large number on top of each other arranged rollers and nips provided between them that are traversed by the paper web. Through the Many nips result in a high degree of coverage and a good distribution of the satin work between print and Temperature.
  • Super calenders are usually provided offline, i.e. the one coming out of the paper machine Paper web first wound up on a spool and with this is transferred to the super calender, which she then with at a significantly lower speed than the paper machine speed goes through.
  • the offline installation has the advantage that the paper web is in the Supercalender can still compensate, so that in the supercalender not with the conditions influenced by many factors must be worked from the paper machine.
  • machine or soft calenders can be connected online to a paper machine and therefore be traversed at paper machine speed.
  • Machine calenders however, have only a few nips, see above that worked with higher pressure and temperature and the Paper web is stressed accordingly.
  • More essential The disadvantage of the soft calender is that not all types of paper in high quality can be refined.
  • SC-A paper it is not possible with a high-density online soft calender Manufacture SC-A paper. It is more recent managed the printability properties of a with 11 Nips of super calendered gravure paper too to achieve with only four nips of a soft calender, however, relatively high roller temperatures and Compressive stress in the nips required.
  • the object of the invention is the online production of SC-A paper.
  • This object is essentially achieved with the invention solved that the coming out of the paper machine, online one Supercalender (multinip soft calender) fed paper web immediately before the first nip of the supercalender Steam is moistened and passed through the first nip before the steam application increased surface moisture below a predetermined value has dropped in the range of 12% to 25%.
  • Supercalender multinip soft calender
  • Paper is a voluminous fiber structure with different behavior in the thickness direction. To simplify this, one could imagine three areas (layers) arranged one above the other for SC-A paper with a material weight of approx. 50 g / m 2 .
  • the paper surface is understood here to mean the uppermost area of the paper, that is to say the upper third of the material web in the case of the SC-A paper mentioned.
  • the moisture tends to equalize across the cross-section of the material web, it being provided according to the invention that the paper web enters the first nip before the surface moisture (upper third of the material web) reaches a predetermined value of 12% to 25 % has dropped.
  • the moisture gradient between the paper web surface and the central region of the paper web allows the surface to be worked more strongly in order to achieve better gloss and smoothness properties in the nip, while the central region of the paper web ensures sufficient stability.
  • the invention makes use of the ideas that DE 43 01 023 C2 for machine calenders are known. Also there is already provision for the paper web to be in front of it to vaporize the nip and the paper web through the nip to conduct before the temperature and humidity in the Have compensated for the paper web.
  • SC-A papers are not compatible with such machine calenders possible. It has now been recognized that this is for machine calenders known methods such a gentle treatment of the Paper web allows the paper web to be used without the previously The usual strong drying is fed online to a supercalender can be, making an online production of SC-A paper is made possible.
  • the Paper web through the first nip of the supercalender performed before the one caused by the steam application Temperature increase in the middle third of the paper web 1 / e times the temperature increase at the surface reached Has.
  • the temperature curve over the paper web can also be determine mathematically or empirically. By double Temperature and moisture gradients can be the gloss and Influencing the smoothness of the paper web surface still improve.
  • the paper web is expediently exposed to steam cooled on the supercalender to the temperature gradient to reinforce.
  • the temperature of the calender or Steel roller in the first nip of the supercalender is greater than 125 ° C and is preferably about 150 ° C to to remove the high humidity of the web surface. At the same time the temperature gradient and thus the smoothness and Enhancement of gloss increased.
  • the paper web has the dryer section of the paper machine a relatively high temperature of, for example, 125 ° C.
  • an intermediate cooling is provided with which the Web temperature is preferably reduced to about 30 ° C.
  • the paper web in Supercalender is moistened with steam.
  • the essentially steam moistening influencing the surface of the paper web enables gentle handling of the paper web and additional reinforcement. the smoothness and gloss improvement in the nip.
  • the moisture of the Paper web behind the intermediate cooling section (s) is determined, and that the steam application at Post-moistening and / or before the first nip of the Supercalender depending on the determined actual moisture values and predetermined target values is regulated.
  • the task is done with a device for online production solved by SC-A paper in that in a paper machine with a dryer section and one behind the dryer section supercalender arranged online (multinip soft calender) with a variety of nips by the paper web be run through, following the dryer section of the An intermediate cooling section is provided to paper machine to reduce the temperature of the paper web, that the Intermediate cooling section connects an evaporation device, to increase the moisture of the paper web, and that immediately before the first nip of the supercalender Steam delivery device is provided so that the through the Steam exposure causes temperature and humidity to increase the paper web is not yet balanced when the paper web passes through the nip.
  • the vaporization device follows a second cooling section to adjust the web temperature before Reduce supercalender again.
  • the web By cooling the web before applying the steam to the first nip of the supercalender there is a sufficient amount of steam for condensation brought.
  • the moisture and moisture generated by vaporization Temperature gradient is maintained until the first nip, because the Vaporization only immediately before the first nip of the supercalender takes place so that a compensation of the temperature and Moisture is not possible.
  • a measuring frame is provided with which the Moisture of the paper web is detected, the determined Measured values for controlling the vaporization device and / or the Steam delivery device can be used. This allows the Steaming always adapted to the current conditions become.
  • the measured values determined for Control of the steam delivery device can be used to undesirable changes in gloss or smoothness immediately to be able to correct.
  • the Temperature of the rollers on the basis of the measured values determined is adjusted.
  • the steaming device that follows the dryer section is provided for rewetting the paper web
  • a steam delivery device on the inlet side to which a heating duct connects, which is separated from the Paper web is traversed. This ensures that the moisture applied by the steam delivery device can even out over the cross section of the paper web.
  • This process is supported according to the invention in that warm, saturated air is provided in the heating duct is suctioned off again at the end of the heating duct.
  • the single figure shows schematically the structure of an inventive Device for online production of SC-A paper.
  • a device 1 for the online production of SC-A paper has a paper machine, of which in the Drawing only the last section of the dryer section is indicated. The detailed design of the paper machine plays no role in the invention.
  • a second cooling section 10 here two Cooling rollers 11, 11 'and a suction roller arranged between them 12 has.
  • the temperature of the Paper web 3 cooled down again to approx. 32 ° C, the Paper web 3 at the end of the cooling section 10 a moisture from 7 to 11.5%.
  • the moisture content of the paper web 3 is detected via a measuring frame 13.
  • the paper web 3 is then online a super calender 14 fed from a plurality of nips (Nips) 15 consists of one after the other from the paper web be run through. With supercalender it becomes a multinip soft calender designated.
  • Each nip 15 is replaced by a Polymer roller 16 and a steel roller 17 formed on at least 125 ° C, preferably heated up to 150 ° C.
  • pulleys 18 are provided to the paper web 3 through the corresponding nips lead.
  • a steam delivery device 19 is provided, which in particular can consist of a steam blow box, as described in DE 43 01 023 C2.
  • steam delivery devices 19, 19 ' are arranged on the top and bottom of the paper web 3.
  • a suction 20 is assigned to the steam delivery device 19, 19 ', via which supersaturated air is extracted.
  • further steam delivery devices 21 are provided in front of further nips 15 2 , 15 3 , 15 4 , 15 6 , 15 7 , 15 9 , via which the paper web 3 is rewetted in order to partially compensate for the loss of moisture in the nips 15.
  • a measuring frame 22 Following the supercalender 14 is a measuring frame 22 provided the gloss and / or smoothness of the paper web 3rd determined.
  • a so-called double-stack supercalender can be used, where two groups of nips in a row are arranged, which successively pass through the paper web become. This increases the height of the calender decreased. Otherwise, the device 1 remains unchanged.
  • the method according to the invention can be used in a double-stack calender perform in the same way as in Fig. 1 shown calender.
  • the paper web 3 emerging in the usual way from the dryer section of the paper machine first passes through the intermediate cooling section 2, in which its temperature is reduced to 32 ° C.
  • the paper web 3 is moistened and heated in the subsequent vapor deposition device 7.
  • the heating channel 9 through which the paper web 3 passes ensures that the moisture is evened out over the cross section of the paper web 3.
  • the paper web 3 leaves the vapor deposition device 7 at a temperature of approximately 92 ° C., which would, however, impair the increase in gloss and smoothness in the supercalender 14, since not enough steam would condense in front of the first nip 15 1 .
  • the temperature of the paper web 3 in the second cooling section 10 is therefore reduced again to approximately 32 ° C., the paper web having a moisture content of approximately 7 to 11.5%.
  • the steam delivery device 19, 19 ' hot, droplet-free steam is now applied to the paper web surface immediately in front of the first nip 15 1 of the supercalender 14, the steam temperature in the steam blowing chamber of the steam delivery device 19, 19' being approximately in the range from 102 ° C. to 110 ° C is to prevent condensation of the steam.
  • the steam delivery device 19, 19 ' is brought as close as possible to the nip 15 1 , the distance being adjustable depending on the speed at which the paper web 3 passes through the nip 15.
  • the steam condenses, drastically increasing the temperature on the surface of the paper web 3.
  • the surface will be approximately 90 ° C. hot after the condensation of the steam.
  • the condensed steam forms a moisture film, the strength of which is, for example, in the range of a thousandth of a millimeter.
  • the condensation results in an almost sudden increase in temperature of the surface of the paper web 3, which, however, compensates for itself within a very short time via the thickness of the paper web 3, so that the paper web 3 has a uniform temperature distribution within fractions of a second.
  • the top layer in the case of SC-A paper with a fabric weight of approx. 50 g / m 2, about a third of the paper web
  • the top layer has a significantly higher relative humidity than the central region of the paper web 3.
  • the paper web 3 passes through the first nip 15 1 of the supercalender 14. Also the temperature of the paper web 3 is not yet balanced at this time, rather the temperature increase in the middle third of the paper web caused by the steam application should not yet have reached 1 / e times the temperature increase of the surface of the paper web 3 .
  • the paper web 3 is treated by smoothing the surface of the web 3, which still has the increased temperature and humidity, or is provided with an increased gloss.
  • the areas of the paper web 3 lying further inside are not significantly changed by the roller gap 15 1 .
  • the paper web 3 then runs through the further nips 15 2 to 15 11 of the supercalender 14, the paper web 3 being moistened by the steam delivery devices 21 before individual nips in order to improve the increase in gloss and smoothness.
  • the setpoint On the basis of the measured values of the measuring frame 22 and The setpoint is the steam delivery through the Steam delivery devices 19, 19 'and / or 21 and possibly the Heating of the calender rolls 17 controlled. In a similar way serve the moisture values determined by the measuring frame 6 and 13 together with the corresponding setpoints Control of the steam application in the steaming device 7 and the steam delivery device 19, 19 '.
  • SC-A paper online to produce, with gloss values of 48 to 50 Hunter gloss points (SC-A) and when performing rewetting and Intercooling 50 to 52 Hunter highlights (SC-A +) are reachable. This is essentially due to the gentle Treatment of the paper web with high humidity and temperature achieved in the surface areas that allow the Supercalender a paper web with high initial moisture feed.

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  • Paper (AREA)
EP99100989A 1998-05-08 1999-01-21 Procédé et dispositif pour la fabrication de papier SC-A online Expired - Lifetime EP0957202B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19820606 1998-05-08
DE19820606 1998-05-08
DE19826899 1998-06-17
DE19826899A DE19826899B4 (de) 1998-05-08 1998-06-17 Verfahren und Vorrichtung zur Online-Kalandrierung von SC-A-Papier

Publications (3)

Publication Number Publication Date
EP0957202A2 true EP0957202A2 (fr) 1999-11-17
EP0957202A3 EP0957202A3 (fr) 1999-12-22
EP0957202B1 EP0957202B1 (fr) 2004-03-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100989A Expired - Lifetime EP0957202B1 (fr) 1998-05-08 1999-01-21 Procédé et dispositif pour la fabrication de papier SC-A online

Country Status (1)

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EP (1) EP0957202B1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199404A2 (fr) 2000-10-20 2002-04-24 Voith Paper Patent GmbH Procédé et dispositif de calandrage d'une bande
EP1357225A1 (fr) * 2002-04-23 2003-10-29 Voith Paper Patent GmbH Procédé pour traiter un matériau en bande et calandre
EP2682520A1 (fr) * 2012-07-03 2014-01-08 Metso Paper Inc. Procédé de production d'une bande fibreuse et ligne de production d'une bande fibreuse
DE102017106047A1 (de) 2017-03-21 2018-03-01 Voith Patent Gmbh Bahnbehandlung
WO2018141727A1 (fr) * 2017-02-03 2018-08-09 Voith Patent Gmbh Traitement de bande continue
CN108914678A (zh) * 2018-07-10 2018-11-30 温州新意特种纸业有限公司 一种超级压光机
WO2019115440A1 (fr) * 2017-12-15 2019-06-20 Voith Patent Gmbh Traitement de bande
DE102021113813A1 (de) 2021-05-28 2022-12-01 Voith Patent Gmbh Verfahren und Vorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3741680A1 (de) * 1987-12-09 1989-06-22 Pagendarm Gmbh Verfahren und vorrichtung zum glaetten der oberflaeche einer papierbahn
EP0341457A2 (fr) * 1988-05-06 1989-11-15 Eduard Küsters Maschinenfabrik GmbH & Co. KG Procédé pour produire une bande de papier lisse et brillant, et calandre pour l'application du procédé
EP0380427A2 (fr) * 1989-01-27 1990-08-01 Measurex Corporation Dispositif de contrôle du lissage dans le sens transversal et son procédé d'application
DE4301023A1 (de) * 1993-01-16 1994-07-21 Vib Apparatebau Gmbh Verfahren und Vorrichtung zum Erhöhen von Glanz und/oder Glätte einer Materialbahn
DE29813663U1 (de) * 1998-05-08 1998-11-26 V.I.B. Apparatebau Gmbh, 63477 Maintal Vorrichtung zur Online-Herstellung von SC-A-Papier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3741680A1 (de) * 1987-12-09 1989-06-22 Pagendarm Gmbh Verfahren und vorrichtung zum glaetten der oberflaeche einer papierbahn
EP0341457A2 (fr) * 1988-05-06 1989-11-15 Eduard Küsters Maschinenfabrik GmbH & Co. KG Procédé pour produire une bande de papier lisse et brillant, et calandre pour l'application du procédé
EP0380427A2 (fr) * 1989-01-27 1990-08-01 Measurex Corporation Dispositif de contrôle du lissage dans le sens transversal et son procédé d'application
DE4301023A1 (de) * 1993-01-16 1994-07-21 Vib Apparatebau Gmbh Verfahren und Vorrichtung zum Erhöhen von Glanz und/oder Glätte einer Materialbahn
DE29813663U1 (de) * 1998-05-08 1998-11-26 V.I.B. Apparatebau Gmbh, 63477 Maintal Vorrichtung zur Online-Herstellung von SC-A-Papier

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FRANZ KAYSER: 'REDEEMING OLD CALENDERS WITH NEW JANUS TECHNOLOGY' PAPER ASIA Bd. OCT.97, Seite 18,20,21 *
KARI K. HILDEN AND DAVID SAWLEY: "Calender steam showers. An effective new way of hot calendering" TAPPI JOURNAL, Bd. 70, Nr. 7, Juli 1987 (1987-07), Seiten 87-91, XP002119371 norcross, ga, usa *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199404A2 (fr) 2000-10-20 2002-04-24 Voith Paper Patent GmbH Procédé et dispositif de calandrage d'une bande
EP1199404A3 (fr) * 2000-10-20 2003-04-02 Voith Paper Patent GmbH Procédé et dispositif de calandrage d'une bande
EP1357225A1 (fr) * 2002-04-23 2003-10-29 Voith Paper Patent GmbH Procédé pour traiter un matériau en bande et calandre
EP2682520A1 (fr) * 2012-07-03 2014-01-08 Metso Paper Inc. Procédé de production d'une bande fibreuse et ligne de production d'une bande fibreuse
CN103526628A (zh) * 2012-07-03 2014-01-22 美卓造纸机械公司 生产纤维幅材的方法以及生产纤维幅材的生产线
CN103526628B (zh) * 2012-07-03 2016-05-18 维美德技术有限公司 生产纤维幅材的方法以及生产纤维幅材的生产线
EP2682520B1 (fr) 2012-07-03 2016-06-22 Valmet Technologies, Inc. Procédé de production d'une bande fibreuse et ligne de production d'une bande fibreuse
WO2018141727A1 (fr) * 2017-02-03 2018-08-09 Voith Patent Gmbh Traitement de bande continue
DE102017106047A1 (de) 2017-03-21 2018-03-01 Voith Patent Gmbh Bahnbehandlung
WO2019115440A1 (fr) * 2017-12-15 2019-06-20 Voith Patent Gmbh Traitement de bande
CN108914678A (zh) * 2018-07-10 2018-11-30 温州新意特种纸业有限公司 一种超级压光机
DE102021113813A1 (de) 2021-05-28 2022-12-01 Voith Patent Gmbh Verfahren und Vorrichtung

Also Published As

Publication number Publication date
EP0957202B1 (fr) 2004-03-31
EP0957202A3 (fr) 1999-12-22

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