EP1956141B1 - Revêtement pour rouleau comprenant une charge réduisant la friction - Google Patents

Revêtement pour rouleau comprenant une charge réduisant la friction Download PDF

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Publication number
EP1956141B1
EP1956141B1 EP08150908A EP08150908A EP1956141B1 EP 1956141 B1 EP1956141 B1 EP 1956141B1 EP 08150908 A EP08150908 A EP 08150908A EP 08150908 A EP08150908 A EP 08150908A EP 1956141 B1 EP1956141 B1 EP 1956141B1
Authority
EP
European Patent Office
Prior art keywords
filler
roll
wear layer
material mixture
roll 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.)
Active
Application number
EP08150908A
Other languages
German (de)
English (en)
Other versions
EP1956141A1 (fr
Inventor
Thomas Stuebegger
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 Patent GmbH
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Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to SI200830015T priority Critical patent/SI1956141T1/sl
Publication of EP1956141A1 publication Critical patent/EP1956141A1/fr
Application granted granted Critical
Publication of EP1956141B1 publication Critical patent/EP1956141B1/fr
Active 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
    • D21G1/02—Rolls; Their bearings
    • D21G1/0233—Soft rolls
    • 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
    • D21F3/08—Pressure rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • 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
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed

Definitions

  • the invention relates to a roller according to the preamble of patent claim 1.
  • Such a roller is out of the WO-A-94/09208 known.
  • Rollers are used in many places on a web-processing machine. About such rolls either the material web is guided directly or it is the material web guided on a belt which supports the web. Furthermore, the surface of the wear layer of the roll cover of the roll is often cleaned by means of a fixed or oscillating scraper, which is in tribological contact with it.
  • scrapers are used, for example, when painting paper.
  • a scraper acting as a squeegee is in contact with the roll cover either on the entire roll length (e.g., film press), or else the dosing member contacts the roll cover only in the edge zones of the roll cover (e.g., a counter roll coater).
  • roller covers are subject to heavy wear, which manifests itself either uniformly over the entire surface of the roller cover or only in certain zones of the surface of the roller cover.
  • UHMW-PE particles which are embedded as a particulate filler in the polymeric matrix material of the wear layer.
  • the UHMW-PE particles have an increased abrasion resistance compared to the polymeric matrix material in which they are embedded. This is intended to improve the service life of the rolls.
  • the invention is achieved by a roller for a machine for processing a material web, in particular a paper, board or tissue machine, with a cylindrical roller core and with a roller cover covering the lateral surface of the roller core.
  • the roll shell of the roll according to the invention further comprises an outer wear layer of a material mixture with polymer material, i. from a material mixture comprising polymeric material.
  • a filler is embedded at least in sections, which has a higher abrasion resistance than the material mixture.
  • the filler also has a lower coefficient of adhesion and sliding friction than the material mixture.
  • the wear layer viewed in its length, has two edge regions bounding the wear layer in its length and a center region arranged between the edge regions, and the filler is embedded in the material mixture only in the two edge sections.
  • a cost-effectively produced roll is provided with a roll cover with a wear layer, which is composed of a material mixture with polymer material in which a filler is embedded, which has a higher abrasion resistance and a lower coefficient of adhesion and sliding friction than the material mixture.
  • the use of the filler according to the invention which has both a higher abrasion resistance and a lower coefficient of adhesion and sliding friction than the material mixture in which it is embedded, has over a roll cover in which a first filler with higher abrasion resistance and a second filler with a lower adhesive and sliding friction coefficients embedded in the material mixture has the advantage that in the roll cover according to the invention the friction-reducing filler is not removed due to its increased abrasion resistance, whereas in the roll cover with two fillers, the first filler due to its higher frictional resistance and the second filler due to its lower abrasion resistance stronger than that Filler of the invention is removed.
  • Abrasion resistance in the sense of the present invention should be understood to mean the abrasion resistance, as determined according to DIN standard 53516.
  • a particularly advantageous embodiment of the invention provides that the filler is particulate.
  • Particles generally have isotropic properties, which is why particles can be easily and inexpensively mixed with the material mixture to provide a specific property, without having to pay attention to their orientation in the mixture.
  • fluorine-containing polymeric materials combine the properties of a high abrasion resistance coupled with low coefficient of adhesion and sliding friction. Therefore, it proves to be particularly advantageous if the filler is formed from a fluorine-containing polymeric material.
  • exemplary is the polymeric fluorine-containing material PTFE, PVDF or FEP.
  • PTFE has a coefficient of sliding friction against steel in the dry state of about 0.2 or less
  • PE or rubber based material mixes against steel in the dry state have sliding friction coefficients of 0.3-0.6 (for PE) and 0.3-1.0 (for rubber) have.
  • the material mixture itself comprises one or more fillers.
  • the filler or fillers may be particulate or fibrous in this case. Also mixtures of particulate and fibrous fillers are conceivable.
  • 100 to 100 parts by weight of polymer material is from 1 to 100 parts, preferably from 2 to 50 parts by weight, of the polymeric fluorine-containing filler.
  • good results are achieved with roller coverings having a wear layer of a material mixture with polymer material in which PTFE particles are embedded in an amount of 1 to 100 phr.
  • the polymeric fluorine-containing filler particles preferably have a size in the range from 1 ⁇ m to 2 mm, preferably in the range from 1 ⁇ m to 500 ⁇ m, particularly preferably in the range from 5 ⁇ m to 100 ⁇ m. In the specified size range, the best results are achieved with respect to the service life of the rolls according to the invention.
  • a suitable combination of materials to the above-mentioned filler proves to be when the polymer material of the material mixture is an elastomer, a thermoplastic or a thermoset or a mixture thereof.
  • the elastomer used here is, for example, NBR (acrylonitrile-butadiene rubber), CSM (chlorine sulfonated polyethylene), NR (natural rubber), PU (polyurethane), HNBR (hydrogenated nitriles), SBR (styrene-butadiene rubber), CR (chlorine). Butadiene rubber) or a mixture thereof.
  • PA polyamide
  • PES polyethersulfone
  • PEEK polyetheretherketone
  • the thermoset one or more epoxy resin (s) is preferably used.
  • the filler (viewed in the radial direction of the roller shell) is embedded in the material mixture over the entire thickness of the wear layer or if the filler is only in a portion of the thickness of the wear layer in the material mixture is embedded.
  • the filler in the areas where it is embedded in the material mixture may be evenly or irregularly distributed.
  • evenly distributed means that in the region in which the filler is embedded, locally the same filler concentration prevails everywhere.
  • evenly distributed in this context means that in the region in which the filler is embedded is a locally varying filler concentration.
  • the dimensioning of the edge regions can be designed such that viewed in the longitudinal extent of the roller, the two edge zones each extend under the material web when the roller is used as intended, ie the material web overlaps with each of the two edge zones or the two edge zones each with the material web close exactly, ie that no overlap between the edge zones and the material web is given. Furthermore, it is possible that viewed in the longitudinal extent of the roller when used as intended, the roller between the material web and the edge zones in each case a distance remains.
  • the roll cover is formed only from the wear layer or that the roll cover is formed by the wear layer and one or more intermediate layers, which is or are arranged between the roll core and the wear layer and usually have a higher hardness as the wear layer.
  • the one or more intermediate layer (s) may in this case be formed by a hard rubber material or a mixture thereof.
  • the two edge regions may also be useful if the two edge regions have a different hardness, in particular a greater hardness than the middle region.
  • Typical hardness values for the wear layer are in the range between 10 and 300 P & J, preferably 10 to 100 P & J.
  • the edge regions 10 to 60P & J are harder than the middle region of the wear layer.
  • a higher hardness results in higher breaking strength of the roll cover.
  • the coating of paper works only with a soft roll cover.
  • a roll cover with harder edge zones than the central area for example, a roll cover with increased breaking strength is provided, which is suitable for painting paper.
  • the surface of the wear layer can be brought into contact with the material web and / or with a belt and / or with a scraper. This use is given, for example, in almost every machine for refining a fibrous web or machine for producing a fibrous web.
  • the FIG. 1 shows a roll 1 according to the invention for a paper, board or tissue machine in cross-section in the region of an edge zone 2 (see FIG. 2 ).
  • the roller 1 has a cylindrical roller core 3 and a roller cover 4 covering the lateral surface of the roller core 3.
  • the roller cover 4 is connected to the roller core 3 with an adhesive layer 5.
  • the roll cover has an intermediate layer 6 formed from hard rubber and an outer wear layer 7, which can be brought into tribological contact with a doctor in the intended use of the roll 1.
  • the wear layer 7 comprises a material mixture 8 with an elastomeric polymer material such as NBR, in which in the two edge regions (see FIG. 2 ) is embedded a particulate fluorine-containing filler 9, which has a higher abrasion resistance and a lower coefficient of adhesion and sliding friction than the material mixture 8.
  • the polymeric fluorine-containing filler 9 is formed from the material PTFE and is present in the wear layer 7 in an amount of 1 to 100 phr, preferably 2 to 50 phr (parts per hundred parts rubber).
  • the PTFE particles 9 furthermore have a size in the range from 1 ⁇ m to 2 mm, preferably in the range from 1 ⁇ m to 500 ⁇ m, particularly preferably in the range from 5 ⁇ m to 100 ⁇ m.
  • the filler 9 is in this case embedded over the entire thickness of the wear layer 7 in the material mixture 8.
  • the wear layer 7 in the middle region 10 is identical to the wear layer in the edge zones 2 except for the PTFE particles, the wear layer 7 has no PTFE particles in the center region 10.
  • FIG. 2 shows the roller 1 of FIG. 1 in perspective view.
  • the wear layer 7 of the roll 1 has, seen in its length, two edge regions 2 delimiting the wear layer 7 and a center region 10 arranged between the edge regions 2, wherein the filler 9 is introduced into the material mixture 8 only in the two edge sections 2 is embedded.
  • the wear layer 7 has a greater hardness in the two edge regions 2 than in the middle region 10.
  • the wear layer 7 has a hardness between 10 and 100 P & J in the middle region 10, the two edge regions 2 having a hardness greater by 10 to 60 P & J ,

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fixing For Electrophotography (AREA)

Claims (12)

  1. Cylindre (1) pour machine de traitement d'une nappe de matière, en particulier machine à papier, à carton ou à tissu-papier, présentant une âme cylindrique de cylindre (3) et un revêtement de cylindre (4) qui recouvre la surface d'enveloppe de l'âme de cylindre (3) et qui comprend une couche extérieure d'usure (7) en un mélange de matériaux (8) contenant un matériau polymère dans au moins certaines parties duquel est incorporée une charge (9) dont la résistance à l'abrasion est plus élevée que celle du mélange de matériaux (8) , le coefficient d'adhérence et de frottement au glissement de la charge (9) étant inférieur à celui du mélange de matériaux (8),
    la couche d'usure (7) présentant dans le sens de sa longueur deux bordures (2) qui délimitent la longueur de la couche d'usure (7) et une partie centrale (10) disposée entre les bordures (2),
    caractérisé en ce que
    la charge (9) n'est incorporée dans le mélange de matériaux (8) que dans les deux bordures (2).
  2. Cylindre selon la revendication 1, caractérisé en ce que les deux bordures (2) ont une dureté différente et en particulier une dureté supérieure à celle de la partie centrale (10) .
  3. Cylindre selon les revendications 1 ou 2,
    caractérisé en ce que la charge (9) présente la forme de particules.
  4. Cylindre selon l'une des revendications 1 à 3, caractérisé en ce que la charge (9) est formée d'un matériau polymère fluoré.
  5. Cylindre selon la revendication 4, caractérisé en ce que le matériau polymère fluoré est le PTFE, le PVDF ou le FEP.
  6. Cylindre selon l'une des revendications 1 à 5, caractérisé en ce que le mélange de matériaux contient une ou plusieurs charges.
  7. Cylindre selon l'une des revendications 4 à 6, caractérisé en ce que la charge polymère fluorée (9) est incorporée à une teneur de 1 à 100 phr, de préférence de 2 à 50 phr (parties pour cent parties de caoutchouc) dans la partie de la couche d'usure (7) dans laquelle la charge polymère fluorée (9) est incorporée dans le mélange de matériaux (8).
  8. Cylindre selon l'une des revendications 4 à 7, caractérisé en ce que les particules de charge polymère fluorée (9) ont une taille comprise dans la plage de 1 µm à 2 mm, de préférence dans la plage de 1 µm à 500 µm et de façon particulièrement préférable dans la plage de 5 µm à 100 µm.
  9. Cylindre selon l'une des revendications 1 à 8, caractérisé en ce que le matériau polymère est un élastomère, un thermoplastique, un plastique thermodurcissable ou un de leurs mélanges.
  10. Cylindre selon l'une des revendications 1 à 9, caractérisé en ce que la charge (9) est répartie dans le mélange de matériaux (8) sur toute l'épaisseur de la couche d'usure (7) .
  11. Cylindre selon l'une des revendications 1 à 9, caractérisé en ce que la charge (9) n'est incorporée dans le mélange de matériaux (8) que dans une partie de l'épaisseur de la couche d'usure (7).
  12. Cylindre selon l'une des revendications 1 à 11, caractérisé en ce que lorsque le cylindre (1) est utilisé correctement, la surface de la couche d'usure (7) peut être mise en contact avec une nappe de matière, un ruban et/ou un racloir.
EP08150908A 2007-02-07 2008-01-31 Revêtement pour rouleau comprenant une charge réduisant la friction Active EP1956141B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200830015T SI1956141T1 (sl) 2007-02-07 2008-01-31 ValjŽŤna prevleka s polnilom za zmanjšanje obrabe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007006821A DE102007006821A1 (de) 2007-02-07 2007-02-07 Walzenbezug mit reibungsverminderendem Füllstoff

Publications (2)

Publication Number Publication Date
EP1956141A1 EP1956141A1 (fr) 2008-08-13
EP1956141B1 true EP1956141B1 (fr) 2009-12-16

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ID=39433828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08150908A Active EP1956141B1 (fr) 2007-02-07 2008-01-31 Revêtement pour rouleau comprenant une charge réduisant la friction

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Country Link
EP (1) EP1956141B1 (fr)
AT (1) ATE452237T1 (fr)
DE (2) DE102007006821A1 (fr)
SI (1) SI1956141T1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011078759A1 (de) * 2011-07-06 2013-01-10 Voith Patent Gmbh Walze mit verschleissbeständiger antihaft-oberfläche

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994009208A1 (fr) * 1992-10-16 1994-04-28 Beloit Technologies, Inc. Procede de fabrication d'une enveloppe pour un rouleau exprimeur
US6328681B1 (en) 1999-01-21 2001-12-11 Stowe Woodward Inc. Elastomeric roll cover with ultra high molecular weight polyethylene filler
DE102004056318A1 (de) * 2004-11-22 2006-05-24 Voith Paper Patent Gmbh Walzenbezug

Also Published As

Publication number Publication date
ATE452237T1 (de) 2010-01-15
DE502008000246D1 (de) 2010-01-28
DE102007006821A1 (de) 2008-08-14
SI1956141T1 (sl) 2010-04-30
EP1956141A1 (fr) 2008-08-13

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