EP1749931A2 - Bande pour machine à papier - Google Patents

Bande pour machine à papier Download PDF

Info

Publication number
EP1749931A2
EP1749931A2 EP06114203A EP06114203A EP1749931A2 EP 1749931 A2 EP1749931 A2 EP 1749931A2 EP 06114203 A EP06114203 A EP 06114203A EP 06114203 A EP06114203 A EP 06114203A EP 1749931 A2 EP1749931 A2 EP 1749931A2
Authority
EP
European Patent Office
Prior art keywords
endless belt
belt according
layer structure
hardness
polymeric layer
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.)
Withdrawn
Application number
EP06114203A
Other languages
German (de)
English (en)
Other versions
EP1749931A3 (fr
Inventor
Arved Westerkamp
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
Original Assignee
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
Publication of EP1749931A2 publication Critical patent/EP1749931A2/fr
Publication of EP1749931A3 publication Critical patent/EP1749931A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F2/00—Transferring continuous webs from wet ends to press sections
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/086—Substantially impermeable for transferring fibrous webs

Definitions

  • the invention relates to an endless belt, such as, for example, a transfer belt or center belt for transporting a fibrous web, in a paper, board or tissue machine.
  • endless belts are, for example, used to transfer a fibrous web from one machine section to another machine section.
  • endless belts may also be used to guide a fibrous web through one or more nips
  • the endless belts known from the prior art generally have, for example, a carrier structure formed from a fabric and a polymeric layer structure formed from only one polymeric material.
  • the crowning can lead to uneven pressure behavior in the nip.
  • the disadvantage of the endless belts known from the prior art is that they are not suitable for causing an uneven pressure profile in the nip, i. in the CD direction, to compensate.
  • the known endless belt has an upper side for transporting a fibrous web in a paper, board or tissue machine and a lower side, wherein the endless belt comprises a carrier structure and a polymeric layer structure and the polymeric layer structure for forming the upper and / or lower side of the endless belt the support structure covered at least on one side.
  • the endless belt according to the invention is characterized in that the polymeric layer structure comprises sections of material with different degrees of hardness, which are arranged one above the other between the top and the bottom and which overlap at least in sections.
  • sections of material having a different degree of hardness should be understood as meaning sections of the polymeric layer structure which are formed from materials having different degrees of hardness.
  • an uneven pressure profile in a nip can be at least partially compensated, since the softer material section (s) causes a damping of the pressure profile.
  • the material portions of different degrees of hardness are formed flat and extend over at least a partial width of the layer structure. If the material sections only extend over a partial width, a different pressure profile can be compensated zonally.
  • the material sections of different degrees of hardness extend over the entire width of the layer structure.
  • the polymeric layer structure forms the top of the endless belt.
  • a self-contained, non-marking paper-side surface can be created which is more optimal for the release of the paper and which also has a reduced tendency to foul.
  • the polymeric layer structure forms the underside of the endless belt as an alternative to the top, wherein the bottom is the intended machine contacting side of the endless belt.
  • the layer structure covers the support structure on both sides, i. that the polymeric layer structure forms the top and the bottom of the endless belt.
  • the layer structure completely encases the carrier structure.
  • the support structure is not only coated on both sides of the layer structure, but completely encased by this, such as. poured into this.
  • the polymeric layer structure can, for example, be sprayed or knife-coated onto the support structure.
  • the support structure can also be dipped in the still liquid polymer material.
  • films of different hardness are laminated together.
  • At least one material section located farther away from the carrier structure has a lower degree of hardness than a material section arranged relatively closer to the carrier structure.
  • the polymeric layer structure forms the paper-contacting upper side of the endless belt
  • this may mean that a material section arranged closer to the paper-contacting side of the endless belt has a lower degree of hardness than a material section arranged relatively further to the paper-contacting side of the endless belt.
  • the support structure is load-bearing.
  • the support structure here may comprise alone or in combination: a woven fabric, a scrim, a knit, a weft knit, a nonwoven, a film, a spiral structure.
  • the polymeric layer structure may be impermeable or permeable.
  • the polymeric layer structure is impermeable, it can only be formed from impermeable or permeable and impermeable material sections.
  • At least one portion of material comprises alone or in combination: epoxy, phenol, polyurethane.
  • At least one material section comprises an elastomeric polymer material, in particular rubber.
  • the elastomeric polymer material may, for example, comprise a thermoplastic elastomer, in particular ethylene vinyl acetate or thermoplastic polyurethane.
  • the abrasion resistance of the machine side of the endless belt or the paper removal properties of the paper-contacting side it may be useful if at least in sections in the polymeric layer structure Particulate and / or fibrous filler is embedded.
  • the support structure may be connected to the polymeric layer structure.
  • the carrier structure is at least partially embedded in the polymeric layer structure. This can be achieved, for example, if the support structure has an open surface, as is the case, for example, with a nonwoven and the polymeric layer structure is cast onto the nonwoven.
  • the endless belt is a transfer belt or a center belt.
  • a center belt is a belt which closes open draws in the paper machine, and which itself passes through the functional elements of the paper machine, e.g. Press, goes through.
  • a paper, board or tissue machine in which at least one machine section comprises an endless belt according to any one of the preceding claims, wherein the machine section is preferably the press section or the dryer section.
  • the endless belt is preferably guided through at least one nip.
  • the press section can comprise a central roller and two mating rollers forming a nip with the central roller, wherein the endless belt wraps around the central roller in such a way that it passes through the two nips.
  • An endless belt used in this way is, for example, a center belt.
  • FIG. 1 shows in section in the CD direction a first embodiment of an endless belt 1 according to the invention designed as a transfer belt.
  • the transfer belt 1 has a top 2 for the transport of a fibrous web and a bottom 3, which can be brought into contact with the paper machine.
  • the illustrated transfer belt 1 is formed by a support structure 4 and by a polymeric layer structure 5, the polymeric layer structure 5 covering the support structure 4 on both sides to form the upper side 2 and the lower side 3 of the transfer belt 1.
  • the polymeric layer structure 5 comprises a first layer 6 forming the upper side 2 of the transfer belt 1, a second layer 7 arranged between the first layer 6 and the support structure 4 and a third layer 8 forming the underside 3 of the transfer belt 1.
  • the first layer 6 is formed by a flat material section 6, the flat material section 6 comprising thermoplastic polyurethane and fibers 11 embedded therein, the free ends of which protrude in sections from the layer 6 and thus partially extend on the upper side 2 of the transfer belt 1. As a result, the paper transfer properties of the conveyor belt 1 are improved.
  • the layer 6 has a hardness of 75 Shore A.
  • the second layer 7 is formed by a flat material portion 7 of polyurethane formed, which extends over the entire width of the polymeric layer structure 5.
  • the layer 7 forming material portion 7 also has a hardness of 95 Shore A.
  • the third layer 8 is formed by a flat material section 8.
  • the material portion 8 comprises a polymeric material, such as phenol, in which particles 12 are embedded.
  • the material section 8 extends over the entire width of the polymer layer structure 5.
  • the polymeric layer structure 5 comprises material sections 6, 7 and 8, wherein the material sections 6 and 7 have a degree of hardness different from one another and these are arranged one above the other between the top side 2 and the bottom side 3 and overlap at least in sections.
  • the material section 6 arranged further away from the carrier structure 4 has a lower degree of hardness than the material section 7 arranged relatively closer to the carrier structure 6.
  • the upper side 2 of the transfer belt 1 forms its intended paper-contacting side.
  • the layer structure 5 was doctored onto the support structure 4.
  • the layers 6 and 7 are firmly connected. Furthermore, the support structure 4 is embedded in each case at least in sections in the layers 7 and 8, so that as a result the support structure 4 is at least partially embedded in the polymeric layer structure 5.
  • the polymeric layer structure 5 is formed impermeable on the whole, in the present embodiment, all layers 6,7 and 8 are impermeable.
  • the support structure 4 load receiving and formed as a fabric with weft yarns 9 and warp threads 10.
  • FIG. 2 shows in section in the CD direction a second embodiment of an endless belt 13 according to the invention designed as a center belt.
  • the center belt 13 has an upper side 14 for transporting a fibrous web and a lower side 15.
  • the shown center belt 13 is formed by a carrier structure 16 and by a polymeric layer structure 17, the polymeric layer structure 17 forming the upper side 14 and the lower side 15 of the center belt 1, the support structure 16 covered on both sides.
  • the polymeric layer structure 17 comprises a first layer 18 forming the upper side 14, a second layer 19 arranged between the first layer 18 and the support structure 16 and a third layer 20 forming the underside 15.
  • the first layer 18 comprises a middle flat material portion 21 made of thermoplastic polyurethane and two material portions 21 flanking the middle material portion 21 on both sides and 23, which comprise a thermoplastic elastomer, such as, for example, ethylene vinyl acetate.
  • the material sections 21, 22 and 23 each extend over a partial width of the polymeric layer structure 17.
  • the two material sections 22 and 23 forming the edge region of the layer 18 have a hardness of 80 Shore A.
  • the material section 21 forming the center region of the layer 18 has a degree of hardness of 100 Shore A.
  • the second layer 19 is formed by a flat material portion 19 of thermoplastic polyurethane, which extends over the entire width of the polymeric layer structure 17.
  • the layer 19 forming material portion 19 also has a hardness of 100 Shore A.
  • the third layer 20 is formed by a flat material portion 20.
  • the material portion 20 comprises a polymeric material, such as phenol, in which particles 24 are embedded.
  • the material section 20 extends over the entire width of the polymer layer structure 17. By embedding the particles 24 in the phenol, the abrasion resistance of the center belt 13 is improved.
  • the polymeric layer structure 17 accordingly comprises sections of material 22, 23 and 19 which have a degree of hardness different from one another and which are arranged one above the other between the upper side 14 and the lower side 15 and overlap at least in sections.
  • the material section 22 and 23 located farther away from the carrier structure 16 has a lower degree of hardness than the material section 19 arranged relatively closer to the carrier structure 16.
  • the upper side 14 of the center belt 14 forms its intended paper-contacting side.
  • the layer structure 17 was poured onto the support structure 16.
  • the layers 18 and 19 are firmly connected. Furthermore, the support structure 16 is in each case at least partially embedded in the layers 19 and 20, so that as a result the support structure 16 is at least partially embedded in the polymeric layer structure 17.
  • the polymeric layer structure 17 is impermeable on the whole, with all the layers 18, 19 and 20 being impermeable in the present exemplary embodiment.
  • the support structure 16 is load-receiving in the machine direction (MD direction) and formed transversely to the machine direction (CD direction).
  • the support structure 16 comprises a nonwoven layer 25 in which a scrim is embedded with yarns oriented in the MD direction 27 and with yarns 26 oriented in the CD direction.

Landscapes

  • Paper (AREA)
EP06114203A 2005-08-06 2006-05-19 Bande pour machine à papier Withdrawn EP1749931A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005037162A DE102005037162A1 (de) 2005-08-06 2005-08-06 Papiermaschinenband

Publications (2)

Publication Number Publication Date
EP1749931A2 true EP1749931A2 (fr) 2007-02-07
EP1749931A3 EP1749931A3 (fr) 2007-12-19

Family

ID=37323245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06114203A Withdrawn EP1749931A3 (fr) 2005-08-06 2006-05-19 Bande pour machine à papier

Country Status (3)

Country Link
US (1) US20070032326A1 (fr)
EP (1) EP1749931A3 (fr)
DE (1) DE102005037162A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1770205A2 (fr) * 2005-09-30 2007-04-04 Voith Patent GmbH Bande pour transferer une bande fibreuse durant la fabrication de celle-ci
WO2008131979A1 (fr) * 2007-04-27 2008-11-06 Voith Patent Gmbh Courroies de transfert

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104832595B (zh) * 2012-08-02 2017-04-12 阪东化学株式会社 传动带及其制造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978428A (en) * 1985-10-03 1990-12-18 Beloit Corporation Bearing blanket for an extended nip press having laminates of different hardnesses
EP1281808A1 (fr) * 2001-07-31 2003-02-05 Ichikawa Co.,Ltd. Bande élastique pour calandre à papier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2323601A1 (fr) * 1973-01-12 1977-04-08 Hartmann Karl Courroie transporteuse a rigidite transversale
IT1176829B (it) * 1984-09-27 1987-08-18 Pirelli Cinghia trapezoidale
DE19912495A1 (de) * 1999-03-19 2000-09-21 Voith Sulzer Papiertech Patent Presseanordnung sowie Preßwalze für eine solche Pressenanordnung
FI111471B (fi) * 1999-10-13 2003-07-31 Tamfelt Oyj Abp Siirtohihna paperikonetta varten

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978428A (en) * 1985-10-03 1990-12-18 Beloit Corporation Bearing blanket for an extended nip press having laminates of different hardnesses
EP1281808A1 (fr) * 2001-07-31 2003-02-05 Ichikawa Co.,Ltd. Bande élastique pour calandre à papier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1770205A2 (fr) * 2005-09-30 2007-04-04 Voith Patent GmbH Bande pour transferer une bande fibreuse durant la fabrication de celle-ci
EP1770205A3 (fr) * 2005-09-30 2010-04-14 Voith Patent GmbH Bande pour transferer une bande fibreuse durant la fabrication de celle-ci
WO2008131979A1 (fr) * 2007-04-27 2008-11-06 Voith Patent Gmbh Courroies de transfert

Also Published As

Publication number Publication date
EP1749931A3 (fr) 2007-12-19
US20070032326A1 (en) 2007-02-08
DE102005037162A1 (de) 2007-02-08

Similar Documents

Publication Publication Date Title
DE60319436T2 (de) Papiermacherformiergewebe
EP1770202B1 (fr) Toile pour machine à papier
DE60016699T2 (de) Transferband für eine Papiermaschine
DE69727706T2 (de) Geflochtenes grundgewebe für eines schuhpressband
EP2198085B1 (fr) Bande transporteuse à bord renforcé
DE102007055902A1 (de) Band für eine Maschine zur Herstellung von Bahnmaterial
EP1711656B1 (fr) Housse de machine a papier de structure modulaire
EP1659216A1 (fr) Rouleau pour la production d'un matériau en bande, en particulier pour l'essorage de matière cellulosique
DE60008658T2 (de) Übertragungsband für eine nasse Bahn
EP1749931A2 (fr) Bande pour machine à papier
EP1770205A2 (fr) Bande pour transferer une bande fibreuse durant la fabrication de celle-ci
EP2367976B1 (fr) Machine de production et/ou de traitement d'une bande continue de matière fibreuse
DE102008043294A1 (de) Verfahren und Vorrichtung zum Überführen der Papierbahn von einem Stützgewebe
DE102005023390A1 (de) Papiermaschinenbespannung
DE69910194T2 (de) Papiermaschine und verfahren zur herstellung von tissue-papier
AT506985B1 (de) Vorpresse, formierpartie und anlage zur herstellung einer mehrlagigen materialbahn
DE102007019960A1 (de) Verbesserungen bei Transferbändern, Hintergrund der Erfindung
EP1748105A2 (fr) Toile pour machine à papier
EP2129829A1 (fr) Bande de presse
EP1941095A2 (fr) Bande de transfert
EP1507039A1 (fr) Toile pour machine à papier
DE60119366T2 (de) Pressenpartie für eine mit einem vorpressspalt versehene kartonmaschine und verfahren zur entwässerung einer papierbahn in einer solchen pressenpartie
DE102007042201A1 (de) Band für eine Maschine zur Herstellung von Bahnmaterial, insbesondere Papier oder Karton
DE102005054509A1 (de) Papiermaschinenbespannung
DE102005033066A1 (de) Papierherstellungsstoff

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid
17P Request for examination filed

Effective date: 20081010

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090324

17Q First examination report despatched

Effective date: 20080731