EP0451449B1 - Verfahren zum Glätten einer beidseitig gestrichenen Papier- oder Kartonbahn - Google Patents

Verfahren zum Glätten einer beidseitig gestrichenen Papier- oder Kartonbahn Download PDF

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Publication number
EP0451449B1
EP0451449B1 EP91101319A EP91101319A EP0451449B1 EP 0451449 B1 EP0451449 B1 EP 0451449B1 EP 91101319 A EP91101319 A EP 91101319A EP 91101319 A EP91101319 A EP 91101319A EP 0451449 B1 EP0451449 B1 EP 0451449B1
Authority
EP
European Patent Office
Prior art keywords
web
gap
treatment
sides
gloss
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.)
Expired - Lifetime
Application number
EP91101319A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0451449A1 (de
Inventor
Harald Hess
Rüdiger Dr. Kurtz
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.)
Sulzer Escher Wyss GmbH
Original Assignee
Sulzer Escher Wyss GmbH
Escher Wyss 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
Application filed by Sulzer Escher Wyss GmbH, Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Publication of EP0451449A1 publication Critical patent/EP0451449A1/de
Application granted granted Critical
Publication of EP0451449B1 publication Critical patent/EP0451449B1/de
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
    • D21G1/006—Calenders; Smoothing apparatus with extended nips

Definitions

  • the invention relates to a method of the type described in the preamble of claim 1.
  • Smoothing the smoothing treatment, is usually the last stage in the manufacturing process of paper or cardboard.
  • Devices such as so-called smoothing units or super calenders are used for this. They are used for two-sided or even one-sided smoothness treatment of the paper or cardboard web.
  • smoothing units with so-called hard and soft treatment gaps, with the hard surfaces delimiting the treatment gap on both sides being practically rigid, and with the soft at least on one side of the gap a resiliently elastic surface is used. The hard surfaces are often heated.
  • a device with soft treatment gaps is, for example, the applicant's NipcoMat smoothing unit (trademark). This can be provided with one or more treatment columns.
  • the surfaces delimiting the treatment gaps are usually formed by rolling with metal-hard or resiliently coated surfaces.
  • the one roll stack has a deflection-controllable soft center roll, which can optionally interact with a soft roll or a heated hard roll, while the other roll stack has a heated hard roll, which can optionally be operated with a deflection-controllable one soft roller or can interact with a deflection-controllable hard roller.
  • the parameters are chosen so that the paper web is subjected to a matt treatment in the gap delimited on both sides by soft rollers. A smoothing treatment with heating on one side takes place in the gap delimited by hard rollers.
  • a matting treatment preceding the smoothing treatment is said to be unusual. If the paper web is passed in succession through the two gaps delimited by a soft and a hard roller, a gloss treatment is first obtained on one side and then a gloss treatment on the other side.
  • the invention is intended to provide a method for smoothing - in particular a paper or cardboard web coated on both sides - in which a smoothness increase and the highest possible level of gloss can be achieved for the finished product, in the same way on the two treated sides of the web .
  • the device provided for carrying out is intended to offer possibilities for the respective optimization of the process also during operation.
  • the first - "soft" gap In the case of two treatment gaps, a surface quality that is already remarkable is generated in the first - "soft" gap when using surfaces coated with a material having a comparatively high modulus of elasticity and using a high treatment pressure on both sides of the web both smooth and shiny.
  • the dynamic modulus of elasticity of the elastic material should advantageously be in the range between 2000 and 10,000 N / mm2 in the radial direction.
  • the smoothness and gloss values achieved in the first gap are increased considerably and are retained on the finished product.
  • the web has the same smoothness and gloss on both sides.
  • a paper or cardboard web 1 to be treated on both sides A and B and coated on both sides is passed through a first gap 2 at a corresponding running speed.
  • the gap 2 is formed between two rotatable rollers 4 and 6, which have flexible cylindrical surfaces 5 and 7, respectively. These are surfaces of an elastically flexible material layer which, in order to be able to work in the gap 2 with a correspondingly high surface pressure, has a high modulus of elasticity. For the same reason, it is advantageous if the smallest possible diameter is chosen for the rollers 4 and 6.
  • the surfaces 5 and 7 are adjustable perpendicular to the web 1 to generate the pressure in the gap 2.
  • at least one of the rollers 4 and 6 can be equipped with pressure-adjustable support elements 12, e.g. with the well-known Nipco elements.
  • the advantage of the first "soft" gap is the even compression of the paper web between the resilient, elastic coatings of the rollers. As a result, there is no overpressure at points with a higher basis weight of the web.
  • the web 1 treated in the first gap 1 is driven through a further gap 3 downstream in the running direction of the web at the same running speed as before.
  • This gap 3 is formed between two rotatable rollers 8 and 10, which are made, for example, of cast iron and have a hard cylindrical surface 8 and 11, respectively.
  • pressure and heat are applied to both sides A and B of the web.
  • the heat transfer surface is advantageously kept as large as possible by selecting the largest possible roller diameter.
  • At least one of the rollers 8 and 10 can be provided with known Nipco support elements 12.
  • the other roller could, for example, be a conventional, adjustable thermal roller.
  • the rollers 8 and 10 can thus be heated and regulated.
  • the Nipco support elements can also advantageously be used in a known manner, which are fed in a regulatable manner for the case with heat-carrying pressure medium.
  • controllability of the heating enables the method to be adapted to achieve the desired treatment results: e.g. an asymmetrical heating can reduce the smoothness and glossy two-sidedness of the two sides A and B of the web 1.
  • the second level of smoothing in the gap 3 brings about an increase in the quality of the web 1 already achieved in the previous gap 2 on the two sides A and B. After this treatment, higher values in terms of smoothness and gloss than in each case are found reached in gap 2 and remain in the end product.
  • the controllability of the heating should also offer correction options in zone-by-zone heating across the width of the web.
  • the pressure in the second gap 3 should be as low as possible in order to avoid local compression of the web. However, a relatively high temperature should be used for this. Therefore, as mentioned above, a large heat transfer area must also be provided in the gap 3. In addition to the smooth surface, large roller surfaces promote the gloss in particular.
  • the invention does not exclude the cases where more than one column of the type of column 2 or 3 described is arranged in succession. In any case, the "soft" column (type gap 2) must be arranged first, then the "hard” column (type gap 3).
  • a smoothing unit according to the invention is shown, in which the surfaces delimiting the respective gap 2 or 3 are formed by circumferential bands guided through the gap.
  • the web 1 is guided through the first gap 2 between surfaces of the belts 13 and 14 which run through the gap and rotate during operation. They are resilient, at least on their side facing the web 1. Due to the elastic flexibility of the band 13 or 14, local overpressures in the web are largely avoided.
  • Both belts 13 and 14 can be of equivalent design and can be driven at the same speed. In this gap 2, primarily pressure is acted on the web. The pressure is generated with pressure-adjustable support elements 12. The web 1 is then guided from the gap 2 through the gap 3 arranged downstream in the running direction.
  • the web 1 is guided between surfaces of the steel strips 15 and 16 which are guided through the gap 3 and have hard surfaces rotating during operation.
  • the running speed of the web 1 in the gap 3, which is given by the rotational speed of the belts 15 and 16, is the same as that of the web in the preceding gap 2.
  • the pressure is generated via adjustable support elements 12, the forces of which act on the belts.
  • the Nipco elements already mentioned are used with advantage.
  • the belts 15 and 16 are also heated via the support elements 12, which are fed with heat-carrying medium for this purpose. The heating can also be imagined with other means, e.g. with inductive heating.
  • This gap 3 can also be made longer in the running direction.
  • the "long" gap 3 results in a longer dwell time for the web 1 as it passes through the gap. This makes it possible to drive in the gap with low pressure, which further reduces the risk of local overpressures in this gap.
  • the selection of low pressures is also possible because the Heat transfer surface gives an advantageous heat transfer to the web 1, whereby the smoothness and in particular the gloss formation are favored. There is no loss of gloss in this gap 3.
  • Different treatment of the two web sides A / B is also possible here by asymmetrical heating of the belts 15 and 16.
  • FIG. 3 shows a third example of a smoothing unit for carrying out the method. It can be advantageous to have the first gap 2 between two resiliently elastically coated rollers 4 and 6, as described in FIG. 1, and the second gap 3 between two circumferential surfaces, which have a hard, practically unyielding surface, as in the case of those in FIG. 2 described tapes 15, 16 to form.
  • the first gap 2 could be formed between elastic, resiliently coated bands; the second gap 3 would - as shown in Fig. 1 - between two heated, hard rollers of large diameter. This variant was not shown in the drawing because it is easy to imagine.
  • the process is not limited to the smoothing of paper or cardboard webs coated on both sides. It is possible, according to the invention, to smooth even uncoated or unilaterally coated webs with good results.

Landscapes

  • Paper (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP91101319A 1990-04-09 1991-02-01 Verfahren zum Glätten einer beidseitig gestrichenen Papier- oder Kartonbahn Expired - Lifetime EP0451449B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011394A DE4011394C1 (fi) 1990-04-09 1990-04-09
DE4011394 1990-04-09

Publications (2)

Publication Number Publication Date
EP0451449A1 EP0451449A1 (de) 1991-10-16
EP0451449B1 true EP0451449B1 (de) 1994-09-14

Family

ID=6404035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101319A Expired - Lifetime EP0451449B1 (de) 1990-04-09 1991-02-01 Verfahren zum Glätten einer beidseitig gestrichenen Papier- oder Kartonbahn

Country Status (6)

Country Link
US (1) US5137678A (fi)
EP (1) EP0451449B1 (fi)
AT (1) ATE111542T1 (fi)
CA (1) CA2039956C (fi)
DE (2) DE4011394C1 (fi)
FI (1) FI97400C (fi)

Families Citing this family (20)

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Publication number Priority date Publication date Assignee Title
DE4030537C1 (fi) * 1990-09-27 1991-10-10 Kleinewefers Gmbh, 4150 Krefeld, De
DE4124560A1 (de) * 1991-07-24 1993-01-28 Wacker Chemie Gmbh Beschichtungsmittel zur herstellung von wasserdichten, dampfdurchlaessigen und flammverzoegernden beschichtungen
DE4322644C1 (de) * 1993-07-07 1994-09-29 Billhofer Maschf Gmbh Vorrichtung zum Auftragen wachshaltiger Dispersionen
US5435957A (en) * 1993-09-03 1995-07-25 Pall Corporation Method of preparing a support material for use with a filtration medium
FI95062C (fi) * 1993-12-29 1995-12-11 Valmet Paper Machinery Inc Kalanteri
SE503580C2 (sv) * 1995-03-16 1996-07-08 Korsnaes Ab Bestruken kartong för formade artiklar, produktionslinje för produktion av bestruken kartong, förfarande för framställning av bestruken kartong samt sätt att minska sprickbildningsbenägenheten vid vikning av en bestruken kartong
FI102304B1 (fi) 1997-04-02 1998-11-13 Valmet Corp Kalanterointimenetelmä ja menetelmää soveltava kalanteri
SE509440C2 (sv) * 1997-05-14 1999-01-25 Tetra Laval Holdings & Finance Sätt att framställa ett tryckfärgsdekorerat förpackningmaterial, speciellt för aseptiska förpackningar, samt förpackningsbehållare därav
US6036909A (en) * 1997-11-25 2000-03-14 Kimberly-Clark Worldwide, Inc. Method for embossing web material using an extended nip
DE19757474A1 (de) * 1997-12-23 1999-06-24 Voith Sulzer Papiertech Patent Papierkalander
DE19821820A1 (de) * 1998-05-15 1999-11-18 Voith Sulzer Papiertech Patent Vorrichtung zur Oberflächenbehandlung einer laufenden Materialbahn, insbesondere aus Karton
DE19828156A1 (de) * 1998-06-24 1999-12-30 Voith Sulzer Papiertech Patent Vorrichtung zum Glätten einer Materialbahn
US6183601B1 (en) * 1999-02-03 2001-02-06 Kimberly-Clark Worldwide, Inc. Method of calendering a sheet material web carried by a fabric
FI112965B (fi) * 1999-11-05 2004-02-13 Metso Paper Inc Kalanterointisovitelma paperikonetta varten
DE10101182C1 (de) * 2001-01-12 2002-01-24 Voith Paper Patent Gmbh Verfahren zum Behandeln einer Materialbahn und Kalander
FI116402B (fi) * 2001-04-17 2005-11-15 Metso Paper Inc Kalanterointimenetelmä
EP1304413A3 (de) 2001-10-18 2004-05-12 Voith Paper Patent GmbH Trockenpartie sowie Glättvorrichtung für eine solche Trockenpartie
FI110883B (fi) * 2001-12-12 2003-04-15 Metso Paper Inc Menetelmä kartonkirainan esikalanteroimiseksi
DE10206333C1 (de) 2002-02-14 2003-07-31 Voith Paper Patent Gmbh Breitnip-Kalander-Anordnung und Verfahren zum Satinieren einer Papier- oder Karrtonbahn
DE10255422B4 (de) * 2002-11-28 2004-10-28 Voith Paper Patent Gmbh Verfahren und Vorrichtung zum Behandeln einer Papier- oder Kartonbahn

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT216541B (de) * 1958-11-05 1961-08-10 Rupert Kraft Vorrichtung zum Behandeln flächenartiger Materialien
US3266414A (en) * 1962-05-30 1966-08-16 Karlstads Mek Ab Calenders to overcome barring
US3996328A (en) * 1970-04-01 1976-12-07 Congoleum Corporation Method for finishing resinous surface coverings
DE2230139B2 (de) * 1971-06-28 1980-01-31 Escher Wyss Ag, Zuerich (Schweiz) Walze mit Durchbiegungsausgleich für die Druckbehandlung von bahnförmigen Materialien
CH556946A (de) * 1972-10-26 1974-12-13 Escher Wyss Ag Druckwalze.
DE2815966A1 (de) * 1977-05-18 1978-11-23 Giuseppe Caminiti Maschinenkalander mit veraenderlicher walzenanzahl
DE3131799C2 (de) * 1981-08-12 1984-08-30 Kleinewefers Gmbh, 4150 Krefeld Walzenpresse für Papier- und ähnliche Bahnen, insbesondere Kalander
CA1300412C (en) * 1984-09-13 1992-05-12 Jean-Guy Racine Method and apparatus for high density paper
US4670102A (en) * 1986-01-08 1987-06-02 Westvaco Corporation Tandem calender
DE3815463A1 (de) * 1988-05-06 1989-11-16 Kuesters Eduard Maschf Verfahren zur erzeugung von glaette und glanz auf einer papierbahn und entsprechende kalanderanordnung
DE3821027A1 (de) * 1988-06-22 1989-12-28 Kuesters Eduard Maschf Kalanderanordnung
JP2819535B2 (ja) * 1988-09-29 1998-10-30 日本製紙株式会社 製紙用カレンダ装置
DE3920204A1 (de) * 1988-10-31 1990-05-10 Escher Wyss Gmbh Verfahren zum glaetten einer papier- oder kartonbahn
US4973441A (en) * 1989-07-26 1990-11-27 Beloit Corporation Method of manufacturing a compressibility gradient in paper

Also Published As

Publication number Publication date
FI911668A0 (fi) 1991-04-08
DE59102892D1 (de) 1994-10-20
FI97400B (fi) 1996-08-30
CA2039956A1 (en) 1991-10-10
US5137678A (en) 1992-08-11
ATE111542T1 (de) 1994-09-15
CA2039956C (en) 1995-04-25
FI97400C (fi) 1996-12-10
EP0451449A1 (de) 1991-10-16
FI911668A (fi) 1991-10-10
DE4011394C1 (fi) 1991-11-28

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