US20080289784A1 - Method For Treating A Fibrous Web Downstream Of Slitting - Google Patents

Method For Treating A Fibrous Web Downstream Of Slitting Download PDF

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Publication number
US20080289784A1
US20080289784A1 US11/569,331 US56933105A US2008289784A1 US 20080289784 A1 US20080289784 A1 US 20080289784A1 US 56933105 A US56933105 A US 56933105A US 2008289784 A1 US2008289784 A1 US 2008289784A1
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US
United States
Prior art keywords
fibrous web
metal belt
finishing
printing press
treating
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.)
Abandoned
Application number
US11/569,331
Inventor
Reijo Pietikainen
Eero Suomi
Pekka Taskinen
Mika Viljanmaa
Henri Vaittinen
Risto Talja
Vilho Nissinen
Jorma Laapotti
Jari Ilomaki
Maria Lepola
Juha Lipponen
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
Original Assignee
Metso Paper Oy
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
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Assigned to METSO PAPER, INC. reassignment METSO PAPER, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TALJA, RISTO, SUOMI, EERO, PIETIKAINEN, REIJO, LEPOLA, MARIA, TASKINEN, PEKKA, NISSINEN, VILHO, LAAPOTTI, JORMA, ILOMAKI, JARI, LIPPONEN, JUHA, VAITTINEN, HENRI, VILJANMAA, MIKA
Publication of US20080289784A1 publication Critical patent/US20080289784A1/en
Assigned to VALMET TECHNOLOGIES, INC. reassignment VALMET TECHNOLOGIES, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: METSO PAPER, INC.
Abandoned 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
    • D21G1/0066—Calenders; Smoothing apparatus using a special calendering belt
    • 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 present invention relates to a method for treating a fibrous web downstream of slitting, said treatment comprising e.g. calendering, coating or various combinations thereof.
  • paper and board grades exist and can be divided according to basis weight in two classes: papers of a single ply with a basis weight of 25-300 g/m 2 and boards produced by multilayer technique with a basis weight of 150-600 g/m 2 .
  • the borderline between paper and board is floating, the boards with lowest basis weight being lighter than the heaviest papers.
  • Mechanical pulp based or wood containing printing papers include newsprint, uncoated magazine and coated magazine paper.
  • Newsprint consists either entirely of mechanical pulp or may contain a small amount of bleached softwood pulp (0-15%), and/or recycled pulp can be used for replacing some of the mechanical pulp.
  • the following values can probably be considered common for newsprint: basis weight 40-48.8 g/m 2 , ash content (SCAN-P 5:63) 0-20%, PPS s10 roughness (SCAN-P 76-95) 3.0-4.5 ⁇ m, Bendtsen roughness (SCAN-P21:67) 100-200 ml/min, density 600-750 kg/m 3 , brightness (ISO 2470:1999) 57-63%, and opacity (ISO 2470:1998) 90-96%.
  • Uncoated magazine paper generally comprises mechanical pulp at 50-70%, bleached softwood pulp at 10-25%, and fillers at 15-30%.
  • Typical values for calendered SC paper are basis weight of 40-60 g/m 2 , ash content (SCAN-P 5:63) of 0-35%, Hunter gloss (ISO/DIS8254/1) of ⁇ 20-50%, PPS s10 roughness (SCAN-P 76:95) of 1.0-2.5 ⁇ m, density of 700-1250 kg/m 3 , brightness (ISO 2470:1999) of 62-70%, and opacity (ISO 2470:1998) of 90-95%.
  • HWC can be coated even more than twice.
  • Woodfree printing papers made of chemical pulp or fine grade papers include uncoated- and coated-chemical pulp based printing papers, in which the fraction of mechanical pulp is less than 10%.
  • Uncoated printing papers based on chemical pulp contain bleached birchwood pulp at 55-80%, bleached softwood pulp at 0-30%, and fillers at 10-30%.
  • WFU shows wide fluctuation of values: basis weight 50-90 g/m 2 (even up to 240 g/m 2 ), Bendtsen roughness 250-400 ml/min, brightness 86-92%, and opacity 83-98%.
  • Coated printing papers based on chemical pulp have coatings fluctuate over a wide range according to requirements and application.
  • Board making is performed by using chemical pulp, mechanical pulp and/or recycled pulp. Board grades can be divided e.g. in the following main groups according to applications intended therefor.
  • Corrugated board including a liner and a fluting.
  • FBB folding boxboard
  • LPB liquid packaging board
  • WLC white-lined chipboard
  • SBS solid bleached sulfite
  • SUS solid unbleached sulfite).
  • a method of the invention is characterized by what is set forth in the characterizing clause of claim 1 .
  • the treatment of a fibrous web for providing desired properties is performed e.g. at a printing site, prior to passing the fibrous web to a printing press, by using one or more finishing units, at least one of which is a metal-belt equipped web processing apparatus, e.g. a metal belt calender, a coater, a dryer, a dry coater or the like.
  • a metal belt calender which allows for the use of a very extensive pressure range and application time (heat transfer time and/or treating time) in a treatment zone, one and the same apparatus being applicable for the treatment of numerous different coated and uncoated printing papers and boards, has been described in more detail e.g. in earlier applications PCT/FI03/00066, PCT/FI03/00067 and PCT/FI03/00068 of the applicant for present application, and thus it is not described further at this time.
  • the length of a treatment zone is determined by means of the disposition of belt guiding elements and/or the design and/or disposition of counter-elements, and the contact pressure applied to a web within the treatment zone can be made adjustable for example within the range of about 0.01 MPa to about 200 MPa.
  • the size of a metal belt calender can be made smaller when using it the treatment of rolled-up narrow fibrous webs adapted to the width of a printing press or some other further processing machine.
  • the use of a metal belt calender enables a rapid change of treatment conditions, allowing e.g. for the manufacture of paper and board grades for different applications on the basis of one and the same stock, said stock possibly consisting of a coated or uncoated web of paper or board.
  • a switch between grades can be implemented readily and quickly, enabling the manufacture of even small batches in a cost effective fashion.
  • the stock purchase costs of a printing house will be reduced.
  • metal belt calendering stabilizes the structure of a fibrous web, enabling the minimization of bubbling in a printing press resulting from the use of a water-soluble printing ink.
  • a method of the invention can also be accompanied by a relatively light treatment of the printed fibrous web with a metal belt calender downstream of the printing press, if such treatment is beneficial for polishing the print.
  • association with a metal belt calender can also be provided elements for coating a fibrous web, such as for example a dry coating apparatus or a separate coater, upstream or downstream of the metal belt calender.
  • elements for coating a fibrous web such as for example a dry coating apparatus or a separate coater, upstream or downstream of the metal belt calender.
  • a printing press can be provided not only metal belt calenders but also other types of calenders for enabling a versatile treatment of the fibrous web prior to passing it to the printing press.
  • a metal belt calender can also be used for drying a fibrous web, thus enabling the use of a higher rolling-up moisture on the papermaking line.

Abstract

The invention relates to a method for treating a fibrous web downstream of slitting. In the method, the finishing of a fibrous web for providing desired properties is performed by using one or more finishing units, at least one of which comprises a web processing apparatus provided with a metal belt.

Description

  • The present invention relates to a method for treating a fibrous web downstream of slitting, said treatment comprising e.g. calendering, coating or various combinations thereof.
  • A wide variety of paper and board grades exist and can be divided according to basis weight in two classes: papers of a single ply with a basis weight of 25-300 g/m2 and boards produced by multilayer technique with a basis weight of 150-600 g/m2. As noted, the borderline between paper and board is floating, the boards with lowest basis weight being lighter than the heaviest papers.
  • The following representative descriptions are examples of currently employed values for fibrous webs and substantial deviations from such values are possible. The main source for descriptions is the publication Papermaking Science and Technology, section Papermaking Part 3, finishing, edit. Jokio M., publ. Fapet Oy, Jyväskylä 1999, page 361.
  • Mechanical pulp based or wood containing printing papers include newsprint, uncoated magazine and coated magazine paper.
  • Newsprint consists either entirely of mechanical pulp or may contain a small amount of bleached softwood pulp (0-15%), and/or recycled pulp can be used for replacing some of the mechanical pulp. The following values can probably be considered common for newsprint: basis weight 40-48.8 g/m2, ash content (SCAN-P 5:63) 0-20%, PPS s10 roughness (SCAN-P 76-95) 3.0-4.5 μm, Bendtsen roughness (SCAN-P21:67) 100-200 ml/min, density 600-750 kg/m3, brightness (ISO 2470:1999) 57-63%, and opacity (ISO 2470:1998) 90-96%.
  • Uncoated magazine paper (SC=supercalendered) generally comprises mechanical pulp at 50-70%, bleached softwood pulp at 10-25%, and fillers at 15-30%. Typical values for calendered SC paper (including, among others, SC-C, SOB and SC-A/A+) are basis weight of 40-60 g/m2, ash content (SCAN-P 5:63) of 0-35%, Hunter gloss (ISO/DIS8254/1) of <20-50%, PPS s10 roughness (SCAN-P 76:95) of 1.0-2.5 μm, density of 700-1250 kg/m3, brightness (ISO 2470:1999) of 62-70%, and opacity (ISO 2470:1998) of 90-95%.
  • Table 1 presents typical values for mechanical pulp containing, coatable papers. (MFC=machine finished coated, FOO=film coated offset, LWC=light weight coated, MWC=medium weight coated, HWC=heavy weight coated).
  • TABLE 1
    MFC FCO LWC MWC HWC
    basis weight 50-70 40-70 40-70 70-90 100-135
    (g/m2)
    Hunter gloss 25-40 45-55 50-65 65-70
    (ISO/DIS
    8254/1), (%)
    PPS-s10 2.2-2.8 1.5-2.0 0.8-1.5 0.6-1.0
    roughness, (μm) (offset)
    (SCAN-P 76/95) 0.6-1.0
    (roto)
    density, (kg/m3) 900-950 1000-1050 1100-1250 1150-1250
    brightness (ISO 70-75 70-75 70-75 70-75
    2470: 1999), (%)
    opacity 91-95 91-95 89-94 89-94
    (ISO 2470: 1998),
    (%)
  • Coated magazine paper (LWC=light weight coated) contains mechanical pulp at 40-60%, bleached softwood pulp at 25-40%, and fillers and coating agents at 20-35%.
  • HWC can be coated even more than twice.
  • Woodfree printing papers made of chemical pulp or fine grade papers include uncoated- and coated-chemical pulp based printing papers, in which the fraction of mechanical pulp is less than 10%.
  • Uncoated printing papers based on chemical pulp (WFU) contain bleached birchwood pulp at 55-80%, bleached softwood pulp at 0-30%, and fillers at 10-30%. WFU shows wide fluctuation of values: basis weight 50-90 g/m2 (even up to 240 g/m2), Bendtsen roughness 250-400 ml/min, brightness 86-92%, and opacity 83-98%.
  • Coated printing papers based on chemical pulp (WFC) have coatings fluctuate over a wide range according to requirements and application. The following are typical values for once and twice coated printing paper based on chemical pulp: once coated basis weight 90 g/m2, Hunter gloss 65-80%, PPS s10 roughness 0.75-2.2 μm, brightness 80-88%, and opacity 91-94%, and twice coated basis weight 130 g/m2, Hunter gloss 70-80%, PPS s10 roughness 0.65-0.95 μm, brightness 83-90%, and opacity 95-97%.
  • Other papers include, among others, sackkraft, tissue, and wallpaper.
  • Board making is performed by using chemical pulp, mechanical pulp and/or recycled pulp. Board grades can be divided e.g. in the following main groups according to applications intended therefor.
  • Corrugated board including a liner and a fluting.
  • Boxboards used for making boxes, containers. Boxboards include, among others, liquid packaging boards (FBB=folding boxboard, LPB=liquid packaging board, WLC=white-lined chipboard, SBS=solid bleached sulfite, SUS=solid unbleached sulfite).
  • Graphic boards used for making e.g. cards, folders, files, cases, covers, etc.
  • As indicated by the foregoing, there is a huge variety of paper and board grades and machines of several different types are used for making the same.
  • It is an objective of the present invention to provide a method and apparatus for treating coated and uncoated papers and boards in an optimal manner in a process following the actual manufacturing line downstream of slitting, the webs to be treated being narrow, e.g. 0.15-4.5 m, the size of finishing machines being thus designed respectively to be substantially smaller than the processing equipment normally present in the manufacturing line.
  • In order to accomplish the objectives of the invention, a method of the invention is characterized by what is set forth in the characterizing clause of claim 1. In the method, the treatment of a fibrous web for providing desired properties is performed e.g. at a printing site, prior to passing the fibrous web to a printing press, by using one or more finishing units, at least one of which is a metal-belt equipped web processing apparatus, e.g. a metal belt calender, a coater, a dryer, a dry coater or the like.
  • A metal belt calender, which allows for the use of a very extensive pressure range and application time (heat transfer time and/or treating time) in a treatment zone, one and the same apparatus being applicable for the treatment of numerous different coated and uncoated printing papers and boards, has been described in more detail e.g. in earlier applications PCT/FI03/00066, PCT/FI03/00067 and PCT/FI03/00068 of the applicant for present application, and thus it is not described further at this time. In a metal belt calender, the length of a treatment zone is determined by means of the disposition of belt guiding elements and/or the design and/or disposition of counter-elements, and the contact pressure applied to a web within the treatment zone can be made adjustable for example within the range of about 0.01 MPa to about 200 MPa.
  • The size of a metal belt calender can be made smaller when using it the treatment of rolled-up narrow fibrous webs adapted to the width of a printing press or some other further processing machine. The use of a metal belt calender enables a rapid change of treatment conditions, allowing e.g. for the manufacture of paper and board grades for different applications on the basis of one and the same stock, said stock possibly consisting of a coated or uncoated web of paper or board. Hence, a switch between grades can be implemented readily and quickly, enabling the manufacture of even small batches in a cost effective fashion. In addition, the stock purchase costs of a printing house will be reduced.
  • Furthermore, metal belt calendering stabilizes the structure of a fibrous web, enabling the minimization of bubbling in a printing press resulting from the use of a water-soluble printing ink.
  • A method of the invention can also be accompanied by a relatively light treatment of the printed fibrous web with a metal belt calender downstream of the printing press, if such treatment is beneficial for polishing the print.
  • In association with a metal belt calender can also be provided elements for coating a fibrous web, such as for example a dry coating apparatus or a separate coater, upstream or downstream of the metal belt calender. In association with a printing press can be provided not only metal belt calenders but also other types of calenders for enabling a versatile treatment of the fibrous web prior to passing it to the printing press.
  • A metal belt calender can also be used for drying a fibrous web, thus enabling the use of a higher rolling-up moisture on the papermaking line.

Claims (5)

1. A method for treating a fibrous web downstream of slitting, characterized in that the finishing of a fibrous web for providing desired properties is performed in the method by using one or more finishing units, at least one of which comprises a web processing apparatus provided with a metal belt, said metal-belt equipped web processing apparatus used in the method comprising a metal belt calender and/or a metal belt coater and/or a metal belt dryer and/or a dry coater, and that the finishing is performed at a printing site for providing the fibrous web with a desired finish prior to passing it to a printing press.
2. A method as set forth in claim 1, characterized in that the method comprises using a common stock to produce various grades for various applications by varying the running conditions of a metal belt calender.
3. A method as set forth in claim 1, characterized in that the method also comprises treating the fibrous web with a metal belt calender downstream of the printing press for polishing the print.
4. A method as set forth in any of claims 1 to 3, characterized in that said one or more finishing units are disposed on-line with respect to the printing press.
5. A method as set forth in any of claims 1 to 3, characterized in that said one or more finishing units are disposed off-line with respect to the printing press.
US11/569,331 2004-06-24 2005-05-31 Method For Treating A Fibrous Web Downstream Of Slitting Abandoned US20080289784A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20045243A FI117444B (en) 2004-06-24 2004-06-24 A method for treating a fibrous web in a post-sectional step
FI20045243 2004-06-24
PCT/FI2005/050184 WO2006000633A1 (en) 2004-06-24 2005-05-31 Method for treating a fibrous web downstream of slitting

Publications (1)

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US20080289784A1 true US20080289784A1 (en) 2008-11-27

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US (1) US20080289784A1 (en)
EP (1) EP1759056B1 (en)
JP (1) JP4927724B2 (en)
AT (1) ATE406476T1 (en)
DE (1) DE602005009359D1 (en)
FI (1) FI117444B (en)
WO (1) WO2006000633A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150136349A1 (en) * 2013-11-21 2015-05-21 Valmet Technologies, Inc. Method for Producing Fiber Webs and Production Line for Producing Fiber Webs
US20160207326A1 (en) * 2013-09-25 2016-07-21 Koenig & Bauer Ag Web-fed inkjet printing press, printing ink and method for printing a printing material
US11171586B2 (en) 2019-04-25 2021-11-09 Black & Decker Inc. Low-speed sensorless brushless motor control in a power tool

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US2997951A (en) * 1957-11-01 1961-08-29 William F Huck Wiping and polishing device for intaglio printing presses
US3684614A (en) * 1969-08-11 1972-08-15 Jerome H Lemelson Process for the manufacture of optical display devices
US4898752A (en) * 1988-03-30 1990-02-06 Westvaco Corporation Method for making coated and printed packaging material on a printing press
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US5806432A (en) * 1995-11-13 1998-09-15 Voith Sulzer Finishing Gmbh Process for converting and printing on webs, and a printing machine for carrying out this process
US6030496A (en) * 1997-04-16 2000-02-29 Kimberly-Clark Worldwide, Inc. Making a web
US6058844A (en) * 1996-09-04 2000-05-09 Consolidated Papers, Inc. Method for minimizing web-fluting in heat-set, web-offset printing presses
US6106902A (en) * 1995-10-05 2000-08-22 Valmet Corporation Method and apparatus for coating a moving paper or cardboard web
US6418840B1 (en) * 1997-04-02 2002-07-16 Metso Paper, Inc. Calendering method and a calender that makes use of the method
US20030160382A1 (en) * 2002-02-23 2003-08-28 Rocco Luongo Sheet decurler in a sheet-processing rotary printing press
US20040035302A1 (en) * 2000-05-03 2004-02-26 Markus Laitila Belt calender
US6740200B2 (en) * 2001-12-19 2004-05-25 Kimberly-Clark Worldwide, Inc. Methods and system for manufacturing and finishing web products at high speed without reeling and unwinding
US20050251977A1 (en) * 2002-01-29 2005-11-17 Juha Lipponen Processing device and method of operating the device for processing a coated or uncoated fibrous web
US20050251976A1 (en) * 2002-01-29 2005-11-17 Juha Lipponen Processing device and method of operating the device for processing a coated or uncoated fibrous web
US20060060322A1 (en) * 2002-01-29 2006-03-23 Mika Viljanmaa Processing device for processing a coated or uncoated fibrous web
US20080044618A1 (en) * 2004-07-02 2008-02-21 Metso Paper, Inc. Method and Apparatus for Coating a Substrate and Printed Matter

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US2347047A (en) * 1940-08-31 1944-04-18 Interchem Corp Printing method and paper for use therein
US2997951A (en) * 1957-11-01 1961-08-29 William F Huck Wiping and polishing device for intaglio printing presses
US3684614A (en) * 1969-08-11 1972-08-15 Jerome H Lemelson Process for the manufacture of optical display devices
US4898752A (en) * 1988-03-30 1990-02-06 Westvaco Corporation Method for making coated and printed packaging material on a printing press
US5318670A (en) * 1991-08-08 1994-06-07 Sulzer-Escher Wyss Gmbh Method for the generation of smoothness and gloss of a paper web
US6106902A (en) * 1995-10-05 2000-08-22 Valmet Corporation Method and apparatus for coating a moving paper or cardboard web
US5806432A (en) * 1995-11-13 1998-09-15 Voith Sulzer Finishing Gmbh Process for converting and printing on webs, and a printing machine for carrying out this process
US6058844A (en) * 1996-09-04 2000-05-09 Consolidated Papers, Inc. Method for minimizing web-fluting in heat-set, web-offset printing presses
US6418840B1 (en) * 1997-04-02 2002-07-16 Metso Paper, Inc. Calendering method and a calender that makes use of the method
US6030496A (en) * 1997-04-16 2000-02-29 Kimberly-Clark Worldwide, Inc. Making a web
US20040035302A1 (en) * 2000-05-03 2004-02-26 Markus Laitila Belt calender
US6740200B2 (en) * 2001-12-19 2004-05-25 Kimberly-Clark Worldwide, Inc. Methods and system for manufacturing and finishing web products at high speed without reeling and unwinding
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160207326A1 (en) * 2013-09-25 2016-07-21 Koenig & Bauer Ag Web-fed inkjet printing press, printing ink and method for printing a printing material
US9776423B2 (en) * 2013-09-25 2017-10-03 Koenig & Bauer Ag Web-fed inkjet printing press and method for printing a printing material
US20150136349A1 (en) * 2013-11-21 2015-05-21 Valmet Technologies, Inc. Method for Producing Fiber Webs and Production Line for Producing Fiber Webs
US9322135B2 (en) * 2013-11-21 2016-04-26 Valmet Technologies, Inc. Method for producing fiber webs and production line for producing fiber webs
US11171586B2 (en) 2019-04-25 2021-11-09 Black & Decker Inc. Low-speed sensorless brushless motor control in a power tool
US11303235B2 (en) 2019-04-25 2022-04-12 Black & Decker Inc. Dual-controller system for a sensorless brushless motor control
US11374514B2 (en) 2019-04-25 2022-06-28 Black & Decker Inc. Sensorless variable conduction control for brushless motor

Also Published As

Publication number Publication date
EP1759056A1 (en) 2007-03-07
FI20045243A (en) 2005-12-25
DE602005009359D1 (en) 2008-10-09
FI117444B (en) 2006-10-13
ATE406476T1 (en) 2008-09-15
FI20045243A0 (en) 2004-06-24
WO2006000633A1 (en) 2006-01-05
EP1759056B1 (en) 2008-08-27
JP2008506043A (en) 2008-02-28
JP4927724B2 (en) 2012-05-09

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