EP0779393A1 - Calandre pour le traitement d'une bande de papier et application pour cette calandre - Google Patents

Calandre pour le traitement d'une bande de papier et application pour cette calandre Download PDF

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Publication number
EP0779393A1
EP0779393A1 EP96118498A EP96118498A EP0779393A1 EP 0779393 A1 EP0779393 A1 EP 0779393A1 EP 96118498 A EP96118498 A EP 96118498A EP 96118498 A EP96118498 A EP 96118498A EP 0779393 A1 EP0779393 A1 EP 0779393A1
Authority
EP
European Patent Office
Prior art keywords
elastic
roller
rollers
working
calender according
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
EP96118498A
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German (de)
English (en)
Other versions
EP0779393B1 (fr
Inventor
Franz Kayser
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.)
Voith Paper GmbH and Co KG
Original Assignee
Voith Sulzer Finishing GmbH
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Publication date
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Application filed by Voith Sulzer Finishing GmbH filed Critical Voith Sulzer Finishing GmbH
Publication of EP0779393A1 publication Critical patent/EP0779393A1/fr
Application granted granted Critical
Publication of EP0779393B1 publication Critical patent/EP0779393B1/fr
Anticipated expiration legal-status Critical
Revoked 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

Definitions

  • the invention relates to a calender for the treatment of a paper web which successively passes through first and second working nips, which are each formed between a hard roll and an elastic roll, one side of the web in the first working nips on the hard rolls and in the second working gaps on the elastic rollers, as well as on an application of this calender.
  • Calenders of the type considered here are widely known. Attempts have been made to give the paper web a high gloss or high smoothness on both sides by first pressing one surface elastically against the smooth hard rollers in the first working nips and then elastically pressing the other surface against the hard rollers in the second working nips.
  • the calender has a roll stack, which is between the first and the second working nips has an alternating gap, or it consists of two or more stacks which are successively traversed by the paper web (DE-U-295 04 034).
  • the invention has for its object to provide a calender of the type described above, with which it is possible to give the paper web approximately the same, high gloss or smoothness on both sides.
  • At least the elastic roller delimiting the last working gap has a lower surface roughness than at least one elastic roller delimiting a first working gap and this lower surface roughness R a ⁇ 0.35 ⁇ m.
  • This proposal is based on the surprising finding that the surface of the elastic roller not only forms an abutment in order to press the opposite side of the paper web against the hard roller for the purpose of gloss and smoothness and possibly due to a micro-slip between this surface and the paper web, the gloss and To promote smoothness, but that its surface texture acts on the paper in a manner similar to the hard roller. This applies in particular if the paper is easier to plasticize due to higher temperature, higher pressure load and / or higher humidity.
  • the surface roughness R a relates to the mean roughness value, that is to say the arithmetic mean of the absolute amounts of the distances between the actual profile and the central profile.
  • the elastic rollers with less surface roughness advantageously have an average roughness depth R z ⁇ 2.5 ⁇ m.
  • the ratio of the surface roughness R a of the elastic roller and the hard roller is ⁇ 7. In practice, it is never possible to match the surface roughness of the elastic roller to that of the hard roller. However, the smallest possible ratio should be striven for.
  • the hard roller has a surface layer made of a wear-resistant material such as tungsten carbide.
  • This surface layer can also be produced with a high degree of smoothness. Due to its wear resistance, it is also suitable for being able to place a scraper on it without impairing the surface quality of the roller.
  • the elastic roller For the construction of the elastic roller with low surface roughness, it is recommended that it has an elastic cover made of plastic.
  • the elastic cover can consist of a fiber-reinforced plastic base layer and a fiber-reinforced plastic cover layer.
  • the base layer can be chosen with particular attention to the elasticity and the top layer with special consideration to the high smoothness.
  • the elastic roller has a cover made of a plastic with such a large resilience that the depth of the permanent deformation after passing through an up to 1 mm thick defect through the working gap is at most 5% of the defect thickness.
  • the large resilience means that the high surface smoothness of the elastic rollers is not lost even with imperfections.
  • the first and second working gaps are arranged in a stack which is traversed by the paper web from top to bottom and are separated from one another by an alternating gap which is delimited by two elastic rollers.
  • the rolls delimiting the second working gaps are particularly heavily loaded due to the weight of the rolls located above them.
  • the compressive stresses occurring in the second working columns are correspondingly high.
  • the low roughness of the last elastic roller has a particularly favorable effect.
  • the stack consists of eight rollers and has four first working gaps and two second working gaps.
  • a very small number of rollers can be used with this construction.
  • Two second working gaps are sufficient to achieve the desired gloss and smoothness value. The fact is exploited that even in the first four working gaps there is a certain smoothing of the paper web surface resting on the elastic rollers, even if elastic rollers with a usual surface roughness R a ⁇ 0.5 ⁇ m are provided there.
  • top and bottom roller of the stack is formed by a heatable hard roller.
  • the stack can consist of eight rollers, but the interchangeable nip is in the middle of the stack.
  • the invention also relates to the use of the aforementioned calender for producing coated paper with almost identical gloss on both sides of at least 75% according to Gardner and above, in particular over 80% gloss according to Gardner.
  • the calender 1 illustrated in FIG. 1 has a roll stack which, from top to bottom, has an elastic upper roll 2, a heatable hard roll 3, an elastic roll 4, a heatable hard roll 5, an elastic roll 6, an elastic roll 7, a heated hard roller 8 and an elastic lower roller 9 comprises.
  • the elastic rollers 6 and 7 form an interchangeable nip 10 between them.
  • a paper web 17 which is taken from an unwinding device 18 (off-line) or a paper machine (in-line), first passes through the first working gaps 11 to 14, one side 19 of the paper web coming into contact with the hard rollers 3 and 5, and following the changing gap 10, the second working gaps 15 and 16, in which the other side 20 of the paper web 17 comes into contact with the hard roller 8 before the web reaches a winding device 21.
  • the paper web 17 is deflected in the usual way via guide rollers 22.
  • a control unit 23 uses a signal line 24 to determine the force P with which the roll stack is loaded.
  • Top roller 2 and bottom roller 9 are deflection adjustment rollers, the degree of deflection of which is influenced by control lines 25 and 26.
  • the three heatable hard rollers 3, 5 and 8 are supplied with heating energy H, for which control lines 27, 28 and 29 are provided. If appropriate, there is also a moistening device which allows the paper web to enter the calender 1 with a predetermined moisture F.
  • the elastic roller 9 consists of a hollow jacket 30 which carries an elastic cover 31.
  • This cover preferably consists of a fiber-reinforced plastic base layer 32, which is mainly responsible for the elasticity, and a fiber-reinforced plastic cover layer 33, which is mainly responsible for the smoothness of the surface 34.
  • fibers primarily those made of plastic, such as aramid fibers ("Kevlar"), come into consideration.
  • the reference plastic is, for example, an epoxy resin.
  • the top roller 2 has the same structure.
  • the elastic rollers 4, 6 and 7 are constructed similarly, with the difference that instead of the hollow shell there is a full or filled core.
  • An example of such an elastic cover 31 is a cover from "TopTec 4" from Scapa Kern, Wimpassing / Austria.
  • the elastic roller 9 delimiting the lowest working gap 16 has a surface roughness R a ⁇ 0.35 ⁇ m, preferably 0.2 to 0.3 ⁇ m have.
  • This value R a is shown in FIG. 3 as follows: the actual profile I is delimited on the upper side by the reference profile A and on the underside by the basic profile B. The middle profile C is selected so that the sum of the material-filled areas D1 enclosed above it by the actual profile I is equal to the sum of the material-free areas D2 enclosed by the actual profile I below it. The average roughness value R a is then the arithmetic mean of the absolute values Amounts of the distances h1 of the actual profile I from the middle profile C.
  • the averaged roughness depth R z is formed as the arithmetic mean of the individual roughness depths (h2) of five adjacent individual measurement sections into which a roughness reference section is divided. This value should be 9 ⁇ 2.5 ⁇ m on the surface 34 of the elastic roller 9.
  • the upper elastic rollers 2, 4 and 6 need not have this high degree of surface quality. It is sufficient if they have a surface roughness R a ⁇ 0.5 ⁇ m in the usual way. This value can be achieved without difficulty by cutting material, for example by grinding, which is possible at relatively low cost.
  • R a ⁇ 0.35 ⁇ m an additional treatment is required in the materials known today, for example leveling the surface with the aid of a counter-roller, which is preferably in contact with low slip, with both rollers overlapping.
  • the roll stack consists of a hard upper roll 35, an elastic roll 36, a hard roll 37, an elastic roll 38, an elastic roll 39, a hard roll 40, an elastic roll 41 and a hard lower roll 42.
  • the changing nip 43 is located between the elastic rollers 38 and 39.
  • a paper web 44 runs through the first working nip in front of the changing nip 43 and second working nip behind the changing nip 43.
  • the dwell time in the working columns should be between 0.1 and 0.9 ms, preferably between 0.2 and 0.5 ms.
  • the calender was particularly suitable for coated papers with a weight of 100 to 150 g / m 2 . It made no great difference whether the screen side of the paper came into contact with the hard rollers or with the elastic rollers.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP96118498A 1995-12-16 1996-11-19 Calandre pour le traitement d'une bande de papier et application pour cette calandre Revoked EP0779393B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19547164 1995-12-16
DE19547164A DE19547164C1 (de) 1995-12-16 1995-12-16 Kalander für die Behandlung einer Papierbahn und Anwendung dieses Kalanders

Publications (2)

Publication Number Publication Date
EP0779393A1 true EP0779393A1 (fr) 1997-06-18
EP0779393B1 EP0779393B1 (fr) 2000-03-22

Family

ID=7780406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118498A Revoked EP0779393B1 (fr) 1995-12-16 1996-11-19 Calandre pour le traitement d'une bande de papier et application pour cette calandre

Country Status (6)

Country Link
US (1) US5746124A (fr)
EP (1) EP0779393B1 (fr)
JP (1) JP2710611B2 (fr)
AT (1) ATE191025T1 (fr)
CA (1) CA2191274C (fr)
DE (2) DE19547164C1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19506301C2 (de) * 1995-02-23 2000-07-13 Voith Sulzer Finishing Gmbh Kalander für Papierbahnen
DE19712370C2 (de) * 1997-03-25 1999-08-05 Voith Sulzer Finishing Gmbh Kalander, insbesondere für Papierbahnen
DE19813640A1 (de) * 1998-03-27 1999-09-30 Voith Sulzer Papiertech Patent Kalander, insbesondere zur Behandlung einer Papierbahn
DE19851936B4 (de) * 1998-11-11 2005-05-12 Voith Sulzer Papiertechnik Patent Gmbh Verfahren zum Satinieren einer Papier- oder ähnlichen Materialbahn und Walze für einen Satinierkalander
DE19925420A1 (de) * 1999-06-02 2000-12-07 Voith Sulzer Papiertech Patent Elastische Walze und Verfahren zum Herstellen einer solchen
DE19928755A1 (de) * 1999-06-23 2000-12-28 Voith Sulzer Papiertech Patent Elastische Walze
US6793754B1 (en) 1999-07-28 2004-09-21 Advanced Materials Corporation Covered roll having an under-layer formed of resin infused densely packed fibers that provides increased strength and adhesion properties
US6206994B1 (en) 1999-07-28 2001-03-27 Advanced Materials Corporation Method and apparatus for covering a metal roll core with a polymeric material preferable a high performance thermoplastic material
US6776744B1 (en) * 1999-07-28 2004-08-17 Advanced Materials Corporation Method for and devices used in covering a roll core with a resin infused fiber reinforced adhesive under layer and a polymeric top layer, the method including the use of an improved mold tape
DE19951038A1 (de) * 1999-10-22 2001-04-26 Voith Paper Patent Gmbh Elastische Walze
EP1243694B1 (fr) * 2001-03-22 2004-07-07 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calandre
DE10206256B4 (de) * 2002-02-15 2006-09-21 Beiersdorf Ag Flächenkalandar und Flächenkalandrierverfahren
JP2007056409A (ja) * 2005-08-25 2007-03-08 Nippon Paper Industries Co Ltd スーパーカレンダー
FI121275B (fi) * 2007-04-12 2010-09-15 Metso Paper Inc Menetelmä kuiturainan kalanteroimiseksi

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5237915A (en) * 1992-02-04 1993-08-24 The Mead Corporation Mixed roll calender
DE29504034U1 (de) 1995-03-09 1995-05-04 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander für die zweiseitige Behandlung einer Papierbahn
EP0732443A1 (fr) * 1995-03-09 1996-09-18 Voith Sulzer Finishing GmbH Calandre pour le traitement d'une bande de papier

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951638B2 (ja) * 1975-09-18 1984-12-14 神崎製紙 （株） 均一な透明性を有する粗面化紙の製造法
US4257843A (en) * 1975-09-18 1981-03-24 Kanzaki Paper Manufacturing Co., Ltd. Method for the production of a matted transparent paper and the product thereof
JPS5817B2 (ja) * 1975-12-25 1983-01-05 カンザキセイシ カブシキガイシヤ セイデンキロクタイ
JPH01250493A (ja) * 1988-03-31 1989-10-05 Kanzaki Paper Mfg Co Ltd 両面光沢塗被紙の製造方法
JPH0214093A (ja) * 1988-06-28 1990-01-18 Kanzaki Paper Mfg Co Ltd キャスト塗被紙の製造方法
US5251551A (en) * 1988-09-29 1993-10-12 Jujo Paper Co., Ltd. Calendering apparatus for paper making process
JP2645887B2 (ja) * 1989-04-06 1997-08-25 富士写真フイルム株式会社 写真印画紙用支持体
US5252185A (en) * 1990-11-30 1993-10-12 S. D. Warren Company Method and apparatus for calendering paper and internally heated roll
JPH05279984A (ja) * 1992-03-26 1993-10-26 New Oji Paper Co Ltd 片面艶消し塗被紙
JPH07258992A (ja) * 1994-03-17 1995-10-09 Nippon Paper Ind Co Ltd 製紙用カレンダ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5237915A (en) * 1992-02-04 1993-08-24 The Mead Corporation Mixed roll calender
DE29504034U1 (de) 1995-03-09 1995-05-04 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander für die zweiseitige Behandlung einer Papierbahn
EP0732443A1 (fr) * 1995-03-09 1996-09-18 Voith Sulzer Finishing GmbH Calandre pour le traitement d'une bande de papier

Also Published As

Publication number Publication date
DE19547164C1 (de) 1997-02-06
EP0779393B1 (fr) 2000-03-22
JP2710611B2 (ja) 1998-02-10
ATE191025T1 (de) 2000-04-15
US5746124A (en) 1998-05-05
DE59604756D1 (de) 2000-04-27
CA2191274C (fr) 2002-02-19
JPH09188988A (ja) 1997-07-22
CA2191274A1 (fr) 1997-06-17

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