EP2160496A2 - Verfahren und vorrichtung zur herstellung einer zumindest im wesentlichen holzfreien gestrichenen papierbahn - Google Patents
Verfahren und vorrichtung zur herstellung einer zumindest im wesentlichen holzfreien gestrichenen papierbahnInfo
- Publication number
- EP2160496A2 EP2160496A2 EP08760881A EP08760881A EP2160496A2 EP 2160496 A2 EP2160496 A2 EP 2160496A2 EP 08760881 A EP08760881 A EP 08760881A EP 08760881 A EP08760881 A EP 08760881A EP 2160496 A2 EP2160496 A2 EP 2160496A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper web
- calender
- application
- guided
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
-
- 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
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
- D21F3/045—Arrangements thereof including at least one extended press nip
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/24—Addition to the formed paper during paper manufacture
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
- D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod
- D21H25/14—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod the body being a casting drum, a heated roll or a calender
Definitions
- the invention relates to a method and an apparatus for producing an at least substantially wood-free or a wood-free similar coated paper web.
- Pre-drying section Pre-calender with soft nip, hard nip or extended nip in the web running direction
- MSP metered size press
- the furnish for the woodfree or nearly woodfree dual level grades comprises:
- NBKP needle bleached kraft pulp, long fiber
- the fiber content of the substance input consists of at least 85% pulp fibers (NBKP (needle bleached kraft pulp, long fiber), LBKP (leaf bleached kraft pulp, short fiber)).
- the paper web is painted after at least one side by means of at least one device for applying liquid or pasty application medium and then dried by means of at least one drying device.
- the paper web is simply painted on a first side before its Vorkalandr réelle by means of a film or a curtain applicator.
- the invention has for its object to provide an improved method and an improved device of the type mentioned, with which for a double stroke on at least one web page, the time efficiency potential of the papermaking process is substantially improved.
- An important aspect of the invention is the avoidance of direct application coating application systems which operate with stationary doctoring elements such as, for example, so-called blade coaters.
- the resulting load on the web due to the relative speed between doctor and web increases the number of breaks. Therefore, according to the invention, at least the last application device operates without contact.
- the last coating application is preferably applied by means of a curtain application device and / or by means of a spray application device.
- the fiber content of the substance input from less than 85% pulp fibers (NBKP (needle bleached kraft pulp, long fiber), LBKP (leaf bleached kraft pulp, short fiber)), preferably from less than 75%, in particular from less than 60% pulp fibers exist.
- the remainder may consist of wood-containing fibers (e.g., groundwood, BCTMP-SF (bleached chemmomechanical pulp, short fiber)).
- substantially wood-free paper web A paper web from this substance entry, which contains a proportion of pulp fibers of more than 55%, is referred to below as "substantially wood-free paper web.”
- the solution according to the invention allows the entry of expensive fibers, with the same or better results better quality of the line, be reduced.
- the fiber content in the paper web essentially corresponds to that of the substance input, whereby differences in the fiber proportion between the substance input and the paper web can arise due to the retention.
- a preferred practical embodiment of the method according to the invention is characterized in that the precoat is applied by means of a film applicator and / or by means of a contactless application method.
- the application is applied by means of a surface moving with the web, as is the case, for example, with a film applicator. This reduces the load on the web compared to the blade application process.
- the paper web is expediently passed through a Vorglätttechnik before the application of the color precoat.
- the paper web is preferably passed through a calender after application of the glue application.
- the consistency may be> 12%, preferably> 15% and in particular> 20%.
- a closed web guide is provided in the press part, in which the web is supported in particular by means of a covering and / or a felt, transfer belt, etc. provided in the press.
- the paper web is guided in the press section by only one shoe press with only one nip.
- the paper web in the press section can also be guided by a plurality of shoe presses arranged one behind the other, each with a wide nip.
- the paper web is also guided by at least one calender.
- the paper web can be guided, for example, by at least one calender with a soft nip which is formed between two calender rolls, of which at least one is provided with a soft plastic cover, in particular in comparison to steel rolls or chill rolls.
- the paper web can also be guided through at least one calender with a hard nip which is formed between two calender rolls, in particular steel rolls and / or chill rolls, each of which has a hard roll surface, in particular in comparison to a plastic cover.
- the paper web can also be passed through at least one calender, in particular shoe calender or metal belt calender, with a long nip extended in the running running direction.
- the device according to the invention is accordingly characterized in that means are provided for applying a double line to at least one side of the web, a contactless application device being provided for applying the last coating application.
- Preferred embodiments of the device according to the invention are specified in the subclaims.
- the additional advantage associated with the curtain coating method is that even at low application weights, a significantly higher application weight coverage can be achieved. This results in a significant improvement in the ability to shift ash from the coating layer to the filler, resulting in significant cost savings for the papermaker.
- Paper quality can be optimized by adequately precalendering the paper prior to application using the curtain applicator or applicator units.
- the optimum quality range for the total on-line concept is the range of about 60 to about 200 g / m 2 , especially in the range of about 80 to about 150 g / m 2 .
- the final calendering of the paper can advantageously be done online or, if necessary, offline.
- the main advantage of the curtain coating method compared to a conventional blade coating method is that the efficiency of calendering is much higher, while reducing the risk of deposits on the calender rolls.
- the method according to the invention and the device according to the invention are advantageous in particular for producing an at least substantially wood-free coated paper web having a filler content of> 8%, in particular> 10% and preferably> 12% with a basis weight ⁇ 90 g / m 2 and / or with one Filler content> 12%, preferably> 14% with a weight per unit area> 90 g / m 2 and / or with a coat weight of the top coat ⁇ 10, in particular ⁇ 9 and preferably ⁇ 8 g / (m 2 'side) at a basis weight ⁇ 90 g / m 2 and / or with a stroke weight of the top coat ⁇ 16 in particular ⁇ 14 and preferably ⁇ 12 g / (m 2 ' side) at a basis weight> 90 g / m 2 usable.
- FIG. 1 is a schematic representation of an exemplary embodiment of a device for the production of an at least substantially wood-free coated paper web
- FIGS. 2a and 2b show a simplified partial schematic representation of another exemplary embodiment of the device with a high-performance dryer
- Applicators comprehensive arrangement for the application of coating color on both sides of the web in the non-contact method and 4 is a diagram in which the covering behavior of a curtain
- Application device is the Abdeckverhaiten a squeegee coating device faced.
- FIG. 1 shows a schematic illustration of an exemplary embodiment of an apparatus 10 for producing an at least substantially wood-free coated paper web with a wire section 12, a press section 14 of a pre-blank section 16, a device 18 for applying a glue application, a post-dryer section 20, a smooth or Vorglätttechnik 22, a device 24 for applying an inking, a drying device 26 and annenrolier 28th
- the device 18 for applying a glue application and the device 24 for applying an ink application can each be, for example, a film applicator.
- two contactless application devices 30, 32 are preferably provided for a double-sided application as the last application means.
- these last application devices 30, 32 can be designed in particular as a curtain application device.
- the optimum quality range for the overall online concept is the range between 60 to about 200 g / m 2 , in particular in the range of about 80 and 150 g / m 2 .
- the final calendering of the paper web can advantageously take place online or, if necessary, also offline.
- the advantages of a curtain application process compared to a conventional rake coating process This is because the calendering efficiency is much higher, while the risk of deposits on the calender rolls is reduced.
- the device may thus comprise means for applying at least one double line to at least one web side, wherein a contactless application device 32 is provided for applying the last coating application.
- a curtain application device and / or a spray application device is preferably provided for applying the last coating application.
- a film application device and / or a contactless application device are advantageously provided.
- the device 25 can be provided for applying a color precoating, wherein the Vorglätttechnik 22 is preferably provided in front of this device 24
- the device 18 for applying a glue application is arranged between the pre-drying section 16 and the after-drying section 20.
- the calender 22 is provided following the pre-drying section 20.
- the paper web is preferably guided in a closed train through the press section 14.
- the paper web can be guided in the press section by only one shoe press with only one shoe press nip or by a plurality of successively arranged shoe presses, each with a shoe press nip.
- the device 10 preferably further comprises at least one calender 34, which in the present case is located, for example, between the means 24 for bringing gene of the paint application or the drying device 26 and the reel 28 is arranged.
- At least one calender can be provided with a soft nip which is formed between two calender rolls, of which at least one is provided with a soft plastic cover, for example, in comparison to steel wafers.
- At least one calender with a hard nip can be provided, which is formed between two calender rolls, in particular steel rolls, each having a hard surface.
- At least one calender in particular shoe calender or metal belt calender, with a wide nip extended in the web running direction.
- the wire section 12 preferably comprises a gap former.
- At least one high-performance dryer 36 can be provided after the press section 14.
- a high-performance dryer 36 may comprise, for example, at least one impingement dryer (see FIG. 2) or, for example, at least one drying cylinder whose surface temperature is> 120 ° C. and preferably 130 ° C.
- the paper web after the high-performance dryer 36 has a dry content> 63%.
- FIGS. 2 a and 2 b show a simplified schematic representation of such an exemplary embodiment of the device 10 with a high-performance dryer 36 and an adjoining single-row pre-dryer section 16.
- the wire section 12 may in particular comprise a gap former again.
- the press section 14 comprises a press 38 with a Saugpresswalze 40 and a nip, is passed through the paper web 42 together with an upper felt 44 and a lower felt 46 to the press 44 is followed by a shoe press 48, by whose broad nip the paper web 42 together with a Obergramz 50 and a lower belt 52 is guided, which may be, for example, a felt or a transfer belt.
- the high-performance dryer 36 which here comprises, for example, an impingement dryer.
- the high-performance dryer 36 comprises, for example, an impingement dryer.
- at least one drying cylinder may be provided, whose surface temperature is> 120 ° C. and preferably> 130 ° C.
- the high-performance dryer 36 is followed by the preferably single-row pre-drying section 16.
- This pre-drying section 16 is followed again by a device 18 for applying a glue application, which in the present case may in particular again comprise a film applicator.
- a drying device 54 in the web running direction L after the device 18 for applying a glue application, a drying device 54, a smoothing or pre-calendering device 22, a film-forming device are arranged one after the other. supporting device 56, a drying device 58, a curtain applicator 60 for the web underside, a curtain applicator 62 for the web top, a contactless Umienk Road 64 such as an Airturn, an Irnpingernent drying device 66, optionally a Kals 68, a cylinder group 70th such as a draft and / or cooling group and a reel 28 provided.
- a drying device 54 in the web running direction L after the device 18 for applying a glue application, a drying device 54, a smoothing or pre-calendering device 22, a film-forming device are arranged one after the other. supporting device 56, a drying device 58, a curtain applicator 60 for the web underside, a curtain applicator 62 for the web top, a contactless Umien
- an air boundary layer suction 72 or 74 can be provided for higher speeds in each case in order to ensure a good coating quality.
- Fig. 3 shows a schematic representation of an exemplary embodiment of a two-curtain applicators 30, 32 comprising arrangement for the application of coating color on both sides of the web in the contactless method.
- a drying device 76 is provided following this arrangement.
- the arrangement according to FIG. 3 can be provided, for example, in the region "X" of the device 10 according to FIG. 1.
- a drying device 76 can be provided in each case again following the curtain application devices 30, 32.
- Shaper Gapformer ⁇ twin-wire shaper
- Shoe press - draft-free, i. the railway is constantly supported, accordingly no breaks;
- the press is preferably followed by a high-speed dryer (eg impingement dryer, the drying cylinders having a high surface temperature of> 120 0 C and preferably> 13O 0 C),
- a high-speed dryer eg impingement dryer, the drying cylinders having a high surface temperature of> 120 0 C and preferably> 13O 0 C
- the web after the high-performance dryer, the web has a dry content of> 63%, resulting in a higher web strength on the first free draw,
- Coating method less doctor blade results in fewer breaks, with a curtain applicator and / or a spray applicator also results in better coverage, whereby the coating weight can be reduced, while the filler can be increased in the paper, which is cheaper and more economical.
- FIG. 4 shows a diagram in which the covering behavior of a curtain applicator is compared with the covering behavior of a knife coater.
- the coverage [%] of the coating weight [g / m 2 ] for a blade coater and a curtain applicator is shown in this diagram.
- the cover can be determined, for example, as an area fraction of the coating order for which the thickness of the coating application exceeds a certain minimum thickness of, for example, 1 micron.
- the method according to the invention and the device according to the invention are advantageous in particular for producing an at least substantially wood-free coated paper web having a filler content of> 8%, in particular> 10% and preferably> 12% with a basis weight ⁇ 90 g / m 2 and / or with one Filler content> 12%, preferably> 14% with a weight per unit area> 90 g / m 2 and / or with a coat weight of the top coat ⁇ 10 in particular ⁇ 9 and preferably ⁇ 8 g / (m 2 ⁇ side) with a basis weight ⁇ 90 g / m 2 and / or with a coating weight of the top coat ⁇ 16 in particular ⁇ 14 and preferably ⁇ 12 g / (m 2 ⁇ side) at a basis weight> 90 g / m 2 usable.
- the present invention thus relates to the production process of at least substantially woodfree coated papers, in particular to the sequences of inking methods, glue application methods and smoothing devices as well as filler contents in paper and line weights.
Landscapes
- Paper (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007029328A DE102007029328A1 (de) | 2007-06-22 | 2007-06-22 | Verfahren und Vorrichtung zur Herstellung einer zumindest im Wesentlichen holzfreien gestrichenen Papierbahn |
PCT/EP2008/057335 WO2009000656A2 (de) | 2007-06-22 | 2008-06-12 | Verfahren und vorrichtung zur herstellung einer zumindest im wesentlichen holzfreien gestrichenen papierbahn |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2160496A2 true EP2160496A2 (de) | 2010-03-10 |
EP2160496B1 EP2160496B1 (de) | 2011-08-31 |
Family
ID=40030860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08760881A Revoked EP2160496B1 (de) | 2007-06-22 | 2008-06-12 | Verfahren zur herstellung einer im wesentlichen holzfreien gestrichenen papierbahn |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100119714A1 (de) |
EP (1) | EP2160496B1 (de) |
CN (1) | CN101680181A (de) |
AT (1) | ATE522661T1 (de) |
DE (1) | DE102007029328A1 (de) |
WO (1) | WO2009000656A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011076713A1 (de) | 2011-05-30 | 2012-12-06 | Voith Patent Gmbh | Verfahren zur Herstellung einer holzfreien gestrichenen oder leichtgewichtig gestrichenen Papierbahn |
WO2016170229A1 (en) | 2015-04-20 | 2016-10-27 | Kotkamills Group Oyj | Method and system for manufacturing a coated paperboard and a coated paperboard |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI114932B (fi) * | 1997-12-18 | 2005-01-31 | Metso Paper Inc | Menetelmä ja laite paperirainan kuivatuksen optimoimiseksi |
FI991096A (fi) * | 1999-05-12 | 2000-11-13 | Valmet Corp | Menetelmä paperin, erityisesti hienopaperin, valmistamiseksi ja paperi konelinja erityisesti hienopaperin valmistamista varten |
FI20011291A (fi) * | 2001-06-18 | 2002-12-19 | Metso Paper Inc | Menetelmä ja paperikone päällystetyn paperin valmistamiseksi |
DE102004003921A1 (de) | 2004-01-27 | 2005-11-24 | Voith Paper Patent Gmbh | Verfahren und Anordnung zur Herstellung einer holzfrei gestrichenen, matten oder halbmatten Papierbahn |
-
2007
- 2007-06-22 DE DE102007029328A patent/DE102007029328A1/de not_active Withdrawn
-
2008
- 2008-06-12 CN CN200880021437A patent/CN101680181A/zh active Pending
- 2008-06-12 AT AT08760881T patent/ATE522661T1/de active
- 2008-06-12 WO PCT/EP2008/057335 patent/WO2009000656A2/de active Application Filing
- 2008-06-12 EP EP08760881A patent/EP2160496B1/de not_active Revoked
-
2009
- 2009-12-22 US US12/645,059 patent/US20100119714A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2009000656A2 * |
Also Published As
Publication number | Publication date |
---|---|
ATE522661T1 (de) | 2011-09-15 |
EP2160496B1 (de) | 2011-08-31 |
CN101680181A (zh) | 2010-03-24 |
US20100119714A1 (en) | 2010-05-13 |
WO2009000656A3 (de) | 2009-02-19 |
WO2009000656A2 (de) | 2008-12-31 |
DE102007029328A1 (de) | 2008-12-24 |
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