EP0979897A2 - Procédé et dispositif pour la fabrication de papier online - Google Patents

Procédé et dispositif pour la fabrication de papier online Download PDF

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Publication number
EP0979897A2
EP0979897A2 EP99110833A EP99110833A EP0979897A2 EP 0979897 A2 EP0979897 A2 EP 0979897A2 EP 99110833 A EP99110833 A EP 99110833A EP 99110833 A EP99110833 A EP 99110833A EP 0979897 A2 EP0979897 A2 EP 0979897A2
Authority
EP
European Patent Office
Prior art keywords
paper web
paper
nip
spray
moistening
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
EP99110833A
Other languages
German (de)
English (en)
Other versions
EP0979897A3 (fr
EP0979897B1 (fr
Inventor
Stefan Winheim
Manfred Diebel
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
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Application filed by VIB Apparatebau GmbH filed Critical VIB Apparatebau GmbH
Publication of EP0979897A2 publication Critical patent/EP0979897A2/fr
Publication of EP0979897A3 publication Critical patent/EP0979897A3/fr
Application granted granted Critical
Publication of EP0979897B1 publication Critical patent/EP0979897B1/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
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G7/00—Damping devices

Definitions

  • the invention relates to a method for producing Paper with high smoothness, being from the paper machine upcoming paper web online a super calender (multinip soft calender) is supplied, in order to achieve the desired smoothness properties a variety of nips passes through, and a device for performing 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 4 nips of a soft calender, yes are relatively high roller temperatures and compressive stresses required in the nips.
  • the object of the invention is therefore the online production of Allow paper with high smoothness.
  • 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 before passing through the first nip with spray is moistened and that the spray mist is about 0.6 to 1.2 s, preferably 0.8 to 1 s before the paper web the first Roll nip passes through is applied to the paper web.
  • Supercalender multinip soft calender
  • the moistening of paper webs with the help of nozzle dampers is basically known.
  • a suitable spray head for this is known for example from DE 38 19 762 C2. Since at Spray individual drops onto the paper web uneven humidification inevitably takes place the paper web. Such humidification has so far been used only used for the offline treatment of paper webs, so that the moisture has enough time to spread evenly to distribute over the paper web.
  • the online humidification will previously carried out by means of steam blow boxes, the at Spray mist by definition occurring drop formation straight should be prevented.
  • the invention recognized that the choice of an appropriate distance between the spray mist and the first nip of the Supercalender also with the online installation and with Conveyed paper web one evenly moistened paper web is accessible.
  • a period of 0.6 to 1.2 s, preferably 0.8 to 1 s is sufficient to get an evenly moistened Get paper web.
  • the location of the humidifier depends essentially on the paper machine speed from. At a normal paper machine speed of up to 1,400 m / min with a desired exposure time of 0.7 s a spatial Distance of the moistening device from the first nip of approx. 16 m. This is appropriate in paper machines Deflections of the paper web can be easily realized.
  • the education Too large drops would even out the moisture distribution prevent in the paper web, causing deterioration in quality during treatment in the nips would lead.
  • the paper web especially in the case of vapor deposition, immediately before the first nip, as in DE 43 01 023 C2 is proposed, treated gently in the calender , it is possible to use a to supply relatively high initial moisture.
  • the moisture content of the paper web is increased by approx. 5 to 7% due to the spray humidification. Based on an average humidity of 2 to 4% after leaving the paper machine, the paper web proves humidification thus a moisture of about 7 to 11%.
  • the increased moisture content makes it easier to deform the paper web on the first nip of the supercalender.
  • the Spray with water with reduced surface tension is produced. So the spray is according to the invention warm water is generated or the spray water becomes surfactants or the like added to increase the surface tension reduce.
  • the droplet size is reduced by that the spray is sprayed with air.
  • the moisture of the Paper web in front of and / or behind the humidifier determined and that the humidification depending on the determined Humidity actual values and predetermined setpoints is regulated.
  • the gloss and / or the Smoothness of the paper web measured and any gloss and / or Differences in smoothness determined over the width of the paper web.
  • the individual spray heads of the nozzle humidifier can be used individually are controlled so that the fog application in the transverse direction the paper web on the determined gloss and / or Differences in smoothness can be adjusted.
  • top and bottom of the paper web moistened so that the one to be applied to the single page
  • the amount of moisture can be reduced accordingly.
  • the task is done with a device for online production solved by paper in that with a paper machine one dryer section and one behind the dryer section online arranged super calender (multinip soft calender) with one A large number of nips passing through the paper web following the dryer section of the paper machine a moistening device with at least one nozzle moistener to apply a spray to the paper web is provided, the moistening device being of the supercalender is spaced so that the paper web first nip about 0.6 to 1.2 s, preferably 0.8 to 1 s after humidification.
  • the moistening device each has at least one one of the top and bottom of the paper web assigned nozzle humidifier.
  • the A nozzle suction is provided, with which the fog in the Unit can be kept and an even distance the paper web to the nozzles can be guaranteed.
  • the Suction creates a vacuum that compensates for the fact that the paper web is spray-moistened by the Nozzle moisture is pushed away.
  • the nozzles in particular are Moistening the top of the paper web arranged horizontally, because of a downward spray could cause drop problems.
  • a plurality of are preferably in the nozzle moistener Spray heads arranged side by side according to the invention can be controlled individually or in groups. It will enables detected differences in gloss and / or smoothness in the transverse direction of the paper web by appropriate control to compensate for the spray strength of individual spray nozzles.
  • a steam delivery device is provided so that the temperature and Moisture increase in the paper web is not yet compensated, when the paper web passes through the nip.
  • the measured values determined to control the Humidification device and / or the steam delivery device be used.
  • a device 1 for online production of paper with high Smoothness, especially SC-A paper has one Paper machine, of which only the one in the drawing last section of the dryer section 2 is indicated. The closer design of the paper machine plays for the Invention doesn't matter.
  • the paper web runs through 3 a moistening device 7, each with a nozzle moistener 7, 8 for the top and bottom 3a, 3b of the Paper web 3 has.
  • the structure of the nozzle dampers 8, 9 is described later. It should only be pointed out here that the the nozzle humidifier 9 assigned to the upper side 3a of the paper web 3 is arranged so that the spraying of moisture on the paper web 3 takes place essentially horizontally.
  • a super calender 11 which consists of a multiplicity of nips 12 1 - 12 9 , through which the paper web 3 passes in succession.
  • a super calender is a multinip soft calender.
  • Each nip 12 is formed by a polymer roller 13 and a steel roller 14 which is heated to at least 125 ° C, preferably up to 150 ° C.
  • deflection rollers 15 are provided in order to guide the paper web 3 through the corresponding nips 12.
  • a steam delivery device 16 is provided, which can in particular consist of a steam blow box, as described in DE 43 01 023 C2.
  • steam delivery devices 16, 16 ' are provided on the top and bottom 3a, b of the paper web 3.
  • a suction device 17 is assigned to the steam delivery device 16, 16 ', via which supersaturated air is extracted.
  • further steam delivery devices 18 are provided in front of further nips 12 2 , 12 7 , via which the paper web 3 is rewetted in order to partially compensate for the loss of moisture in the nips 12.
  • a measuring frame 19th provided the gloss and / or smoothness of the paper web 3rd determined.
  • Fig. 2 is a nozzle moistener 8, 9, with which the moistening the paper web 3 takes place in the moistening device 7, shown in more detail.
  • the nozzle moistener 8, 9 has a housing 20, on the of which Paper side facing a plurality side by side arranged spray heads 21, such as from the DE 38 19 762 C2 are known, is arranged.
  • the spray heads 21 can be controlled individually or in groups such that the Spray strength can be varied.
  • On the housing 20 is a drip pan 22 is also provided, in which condenses Can collect liquid.
  • the drip tray 22 is closed Assembly and maintenance purposes can be pivoted about a joint 23, so that the inside of the housing 20 and the spray heads 21st are accessible.
  • On the housing 20 is in the range Drip pan 22 also provided a suction 24 through which the mist is held in the unit and the paper web is open brought a uniform distance to the spray heads 21 can be.
  • the adjustable sealing strips 26th can have. Pressure compensation is achieved via perforated plates 27 reached in the spray area and the return of possibly condensing moisture in the drip pan 22 allows.
  • a so-called double-stack supercalender can be used, in which two groups of nips are arranged one behind the other, which are successively traversed by the paper web. This reduces the height of the calender. in the the rest of the device 1 remains unchanged.
  • the method can be used with a double-stack supercalender perform in the same manner as that in FIG. 1 illustrated calender.
  • the paper web 3 emerging from the dryer section 2 of the paper machine in the usual way has a moisture content of about 2 to 4% (weight percent), which is checked via the measuring frame 6.
  • the surface tension of the water used for the spray mist is reduced by heating and / or the addition of surfactants or the like.
  • the moistening device 7 the moisture of the web in the measuring frame 10 is checked again, the paper web 3 here having a moisture content of about 7 to 11%.
  • the moistening device 7 is approximately 0.6 to 1.2, preferably 0.8 to 1 s before the first nip 12 1 of the supercalender 11 arranged.
  • the moistening device 7 is arranged only 0.4 to 0.6 s before the first nip 12 1 .
  • the localization of the moistening device 7 thus depends on the paper machine speed. With a paper machine speed of approximately 1,400 m / min and a desired time interval of 0.7 s between moistening and the first nip, this results in a distance of approximately 16.3 m. When the paper machine speed changes, the moistening device 7 must be shifted accordingly.
  • the steam delivery device 16, 16 ' hot, droplet-free steam is applied to the paper web surface immediately before the first nip 12 1 of the supercalender 11, the steam temperature in the steam blowing chamber of the steam delivery device 16, 16' being approximately in the range from 102 ° C. to 110 ° C is to prevent condensation of the steam.
  • the steam delivery device 16, 16 ' is brought as close as possible to the nip 12 1 , the distance in turn being adjustable depending on the speed at which the paper web 3 passes through the nip 12.
  • the steam emerging from the steam delivery device 16, 16 ′ spreads out at a relatively uniform pressure and a uniformly high speed of, for example, 25 m / s or more.
  • 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, but this 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 equalization of the moisture distribution takes a little longer because the moisture penetrates into the paper web 3 more slowly than the temperature. (With evaporation, however, the evaporation takes place considerably faster than with spray humidification.) Therefore, the top layer (with SC-A paper with a fabric weight of approx. 50 g / m 2, about a third of the paper web) has a significantly higher relative humidity than the middle area of the paper web 3. The further the moisture penetrates into the interior of the paper web 3, the more the relative humidity decreases.
  • the paper web 3 Before the moisture in the surface (upper third or, in the case of vapor deposition, the lower third) of the paper web 3 has dropped below a predetermined value in the range from 12% to 25%, in particular from 16 to 25%, the paper web 3 passes through the first nip 12 1 of the supercalender 11. 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.
  • the paper web 3 is treated by smoothing the surface of the paper web 3, which still has the elevated temperature and humidity, or is provided with an increased gloss.
  • the areas of the paper web 3 located further inside are not significantly changed by the nip 12 1 .
  • the paper web 3 then runs through the further nips 12 2 to 12 9 of the supercalender 11, the paper web 3 being moistened by the steam delivery devices 18 before individual nips in order to improve the increase in gloss and smoothness.
  • the humidification is carried out by the Humidification device 7 and the steam output by the Steam delivery devices 16, 16 'controlled.
  • the supercalender 11 becomes a paper web 3 supplied with high initial moisture, which in connection with the gentle treatment of the paper web with high humidity and temperature in the surface areas of online production of paper with excellent smoothness enables.

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  • Paper (AREA)
EP99110833A 1998-08-08 1999-06-05 Procédé et dispositif pour la fabrication de papier online Expired - Lifetime EP0979897B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19835989 1998-08-08
DE19835989A DE19835989C5 (de) 1998-08-08 1998-08-08 Verfahren und Vorrichtung zur Online-Kalandrierung von Papier

Publications (3)

Publication Number Publication Date
EP0979897A2 true EP0979897A2 (fr) 2000-02-16
EP0979897A3 EP0979897A3 (fr) 2000-05-17
EP0979897B1 EP0979897B1 (fr) 2003-11-12

Family

ID=7876940

Family Applications (1)

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EP99110833A Expired - Lifetime EP0979897B1 (fr) 1998-08-08 1999-06-05 Procédé et dispositif pour la fabrication de papier online

Country Status (3)

Country Link
EP (1) EP0979897B1 (fr)
DE (3) DE19835989C5 (fr)
ES (1) ES2210899T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1213387A2 (fr) * 2000-12-08 2002-06-12 Voith Paper Patent GmbH Machine pour la fabrication d'une bande fibreuse
EP1199404A3 (fr) * 2000-10-20 2003-04-02 Voith Paper Patent GmbH Procédé et dispositif de calandrage d'une bande
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
US7387064B2 (en) 2004-03-12 2008-06-17 Metso Paper, Inc. Method and apparatus for producing calendered paper
US7407562B2 (en) 2002-06-19 2008-08-05 Metso Paper, Inc. Method, system and calendar for controlling the moisture profile and/or moisture gradient of a paper web, and a web
DE102007029763A1 (de) 2007-06-27 2009-01-08 Voith Patent Gmbh Vorrichtung und Verfahren zur Befeuchtung einer Faserstoffbahn
CN110016831A (zh) * 2019-03-04 2019-07-16 浙江哲丰新材料有限公司 纸张超压工序的速度提升方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI981594A (fi) * 1998-07-10 2000-01-11 Valmet Corp Menetelmä ja laitteisto rainan kostutuksessa
DE19835989C5 (de) * 1998-08-08 2010-04-01 V.I.B. Systems Gmbh Verfahren und Vorrichtung zur Online-Kalandrierung von Papier
FI108655B (fi) * 1999-06-17 2002-02-28 Metso Paper Inc Menetelmä rainan johtamiseksi kalanteritelanippien välillä ja kalanteri
FI117399B (fi) * 2000-02-07 2006-09-29 Metso Paper Inc Järjestely paperikoneessa
FI113793B (fi) 2002-11-12 2004-06-15 Metso Paper Inc Moninippikalanterin kostutusjärjestely
DE10255716B4 (de) * 2002-11-29 2006-08-31 Voith Paper Patent Gmbh Bahnbehandlungsvorrichtung, insbesondere Kalander
FI5722U1 (fi) * 2002-12-19 2003-03-17 Metso Paper Inc Radan kostutusyksikkö
FI121084B (fi) * 2004-12-01 2010-06-30 Metso Paper Inc Menetelmä ja sovitelma kuituradan käsittelemiseksi
DE102008023924A1 (de) 2008-05-16 2009-11-19 Voith Patent Gmbh Verfahren und Vorrichtung zum Befeuchten einer Faserstoffbahn
DE102008023925A1 (de) 2008-05-16 2009-11-19 Voith Patent Gmbh Verfahren zum Satinieren einer Faserstoffbahn und Kalanderanordnung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3819762C2 (fr) 1988-06-10 1991-04-25 V.I.B. Apparatebau Gmbh, 6457 Maintal, De
DE4301023C2 (de) 1993-01-16 1996-08-22 Vib Apparatebau Gmbh Verfahren und Vorrichtung zum Erhöhen von Glanz und/oder Glätte einer Papierbahn

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Publication number Priority date Publication date Assignee Title
US3948721A (en) * 1974-09-03 1976-04-06 Winheim Karl H Method and apparatus for wetting the web in paper making machines
FI71374C (fi) * 1984-12-31 1986-12-19 Valmet Oy Foerfarande och anordning vid kalandrering av en bana
DE3735438C1 (de) * 1987-10-20 1989-05-18 Kleinewefers Gmbh Verfahren zum Betrieb eines Kalanders und Kalander zur Durchfuehrung dieses Verfahrens
DE3741680A1 (de) * 1987-12-09 1989-06-22 Pagendarm Gmbh Verfahren und vorrichtung zum glaetten der oberflaeche einer papierbahn
DE19826899B4 (de) * 1998-05-08 2005-05-19 V.I.B. Systems Gmbh Verfahren und Vorrichtung zur Online-Kalandrierung von SC-A-Papier
FI981594A (fi) * 1998-07-10 2000-01-11 Valmet Corp Menetelmä ja laitteisto rainan kostutuksessa
US6401355B1 (en) * 1998-07-10 2002-06-11 Metso Paper, Inc. Method and apparatus for manufacturing calendered paper
CA2336959C (fr) * 1998-07-10 2008-04-01 Valmet Corporation Procede et appareil servant a fabriquer un papier pour impression traite en surface
DE19835989C5 (de) * 1998-08-08 2010-04-01 V.I.B. Systems Gmbh Verfahren und Vorrichtung zur Online-Kalandrierung von Papier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3819762C2 (fr) 1988-06-10 1991-04-25 V.I.B. Apparatebau Gmbh, 6457 Maintal, De
DE4301023C2 (de) 1993-01-16 1996-08-22 Vib Apparatebau Gmbh Verfahren und Vorrichtung zum Erhöhen von Glanz und/oder Glätte einer Papierbahn

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199404A3 (fr) * 2000-10-20 2003-04-02 Voith Paper Patent GmbH Procédé et dispositif de calandrage d'une bande
EP1213387A2 (fr) * 2000-12-08 2002-06-12 Voith Paper Patent GmbH Machine pour la fabrication d'une bande fibreuse
EP1213387A3 (fr) * 2000-12-08 2003-12-03 Voith Paper Patent GmbH Machine pour la fabrication d'une bande fibreuse
US7407562B2 (en) 2002-06-19 2008-08-05 Metso Paper, Inc. Method, system and calendar for controlling the moisture profile and/or moisture gradient of a paper web, and a web
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
US7387064B2 (en) 2004-03-12 2008-06-17 Metso Paper, Inc. Method and apparatus for producing calendered paper
DE102007029763A1 (de) 2007-06-27 2009-01-08 Voith Patent Gmbh Vorrichtung und Verfahren zur Befeuchtung einer Faserstoffbahn
CN110016831A (zh) * 2019-03-04 2019-07-16 浙江哲丰新材料有限公司 纸张超压工序的速度提升方法

Also Published As

Publication number Publication date
DE19835989A1 (de) 2000-02-17
ES2210899T3 (es) 2004-07-01
DE59907691D1 (de) 2003-12-18
DE19835989C5 (de) 2010-04-01
EP0979897A3 (fr) 2000-05-17
DE29815847U1 (de) 1998-11-26
DE19835989B4 (de) 2005-06-02
EP0979897B1 (fr) 2003-11-12

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