EP2841647A1 - Rouleau presseur présentant un revêtement en polyuréthane - Google Patents

Rouleau presseur présentant un revêtement en polyuréthane

Info

Publication number
EP2841647A1
EP2841647A1 EP13721295.7A EP13721295A EP2841647A1 EP 2841647 A1 EP2841647 A1 EP 2841647A1 EP 13721295 A EP13721295 A EP 13721295A EP 2841647 A1 EP2841647 A1 EP 2841647A1
Authority
EP
European Patent Office
Prior art keywords
roll
diisocyanate
mixture
roller according
additive
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
EP13721295.7A
Other languages
German (de)
English (en)
Other versions
EP2841647B1 (fr
Inventor
Sarah LIPPL
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 EP2841647A1 publication Critical patent/EP2841647A1/fr
Application granted granted Critical
Publication of EP2841647B1 publication Critical patent/EP2841647B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • D21F3/10—Suction rolls, e.g. couch rolls
    • D21F3/105—Covers thereof

Definitions

  • the invention relates to a roller, in particular for use in a web-processing and / or finishing machine, such as a paper, board or tissue machine according to the preamble of claim 1.
  • the press rolls or suction press rolls used are often coated with polyurethane.
  • the dewatering capacity of the press or Saugpresszenzenbezugs depends mainly on the surface design of the roll cover. Usually there are patterns of blind holes and grooves which provide an open volume into which the water squeezed out of the fibrous web can escape.
  • suction holes are still available, which pass through the roll shell.
  • suction bores for example, water is sucked out of the fibrous web by means of a suction box arranged in an inner volume of the roller.
  • a press roll according to the prior art is known, for example, from WO201 1/015386, where a combination of a press felt with a press roll cover and / or a suction roll cover for a paper machine is described.
  • the press roll cover is provided with a circumferential groove surface structure, wherein the proportion of an open surface on the entire surface of the press roll cover is in the range of 20% to 50%.
  • a suction press roll is provided which, in addition to the circumferential groove surface structure, is provided with a hole arrangement having a plurality of suction holes completely passing through the suction roll cover, the proportion of an open surface on the whole surface of the suction roll cover is in the range of 30% to 50%.
  • additional hole arrangements in the form of blind holes can be provided for both roll shapes.
  • the shape, size and arrangement of the surface forms is significantly involved in the quality of the final product.
  • a wrong choice of open area can lead to instability of the roll cover as well as to hydraulic or mechanical markings.
  • a disadvantage of the press and Saugpresswalzenbegorin known from the prior art is that they are polluted by prolonged use, whereby the surface forms are added by present in the fiber suspension fillers, fiber agglomerates and resin impurities and not more than open volume for the dewatering of the paper web To be available. As a result, the total drainage decreases. Furthermore, unwanted fluctuations in the moisture profile can occur due to uneven contamination.
  • the functional layer consists of a polymer which is a mixture of at least one prepolymer, at least one curing agent and / or at least one crosslinking agent and at least one additive.
  • the polymer which forms the roll cover therefore, an additive is added, which lowers the surface energy of the roll cover, whereby water and dirt do not adhere to the surface of the roll cover and in the surface shapes, but are transported away quickly. This leads to a higher dewatering efficiency of the press roll and thus also of the paper machine. Variations in the moisture transverse profile can be avoided or at least reduced, which increases the quality of the end product.
  • the additive may be selected from: perfluoropolyether, polytetrafluoroethylene, polyethylene, perfluoropolyether or mixtures thereof.
  • the admixture of the additive is preferably between 1 and 20% by weight. The higher the content of additive, the further the surface energy can be lowered.
  • the prepolymer may be a mixture of a polyol and a diisocyanate.
  • the polyol may be selected from: polyethers, polyesters, polycarbonates, polycaprolactones.
  • the diisocyanate may be an aromatic or an aliphatic diisocyanate or a mixture thereof.
  • the aromatic diisocyanate may be selected from: diphenylmethane diisocyanate, toluene diisocyanate or a mixture thereof.
  • the aliphatic diisocyanate may be hexamethylene diisocyanate.
  • the curing agent and / or the crosslinking agent may be a diamine, a diol or a mixture thereof.
  • the curing agent and / or the crosslinking agent may be selected from 4,4'-methylenebis (3-chloro-2,6-diethylanilines) (MCDEA), 4,4'-methylenebis (2-chloroanilines) (MOCA) , 1, 4 butanediol, 1, 3Propandiol, 1, 2 ethane diol, trimethylolpropane or mixtures thereof.
  • MCDEA 4,4'-methylenebis (3-chloro-2,6-diethylanilines)
  • MOCA 4,4'-methylenebis (2-chloroanilines)
  • press and suction press rolls are known to the person skilled in the art.
  • rolls usually have a roll core of a metal such as steel or of a fiber composite, which is provided with a single or multi-layer roll cover.
  • the latter has an outermost layer, which is also referred to as a functional layer and for which the inventive measures are applicable.
  • the connection between the roll core and the roll cover is usually made by a so-called base layer or primer layer. Between this and the functional layer further intermediate layers may be provided.
  • a fixed suction box may furthermore be present in the interior of the roll around which the roll shell rotates in a known manner.
  • the invention is suitable for use on press and suction press rolls with roller covers, which has a functional layer with common hardness and more common Surface roughness, as they are commonly used in paper, board or tissue machines use.
  • the functional layer of the press or suction press roll can be produced, as known to those skilled in the art, for example by a rotational casting process by applying polymer from a nozzle movable along the longitudinal axis of the roll core or roll shell to be coated with uniform rotation of the roll core or shell. After curing, the desired surface structures such as grooves, blind holes, suction holes or combinations thereof are attached and adjusted by grinding the desired surface roughness of about 0.2 to 7.2 Ra.
  • a polyurethane is used according to the invention, which consists of a mixture of a prepolymer, a curing agent and / or a crosslinking agent with the addition of an additive for modification.
  • the prepolymer is prepared from a polyol such as polyether, polyester, polycarbonate or polycaprolactone and a curing agent such as an aromatic and aliphatic diisocyanate.
  • a polyol such as polyether, polyester, polycarbonate or polycaprolactone
  • a curing agent such as an aromatic and aliphatic diisocyanate.
  • aromatic hardener for example, diphenylmethane diisocyanate or toluene diisocyanate is suitable, while as aliphatic hardener, as e.g. Hexamethylene diisocyanate offers.
  • Suitable chain extenders or crosslinkers are diamines such as 4,4'-methylene-bis (3-chloro-2,6-diethylaniline) (MCDEA) or 4,4'-methylene bis (2-chloroaniline) (MOCA) and short-chain Diols such as 1, 4 butanediol, 1, 2 ethanediol, 1, 3 propanediol or trifunctional products such as trimethylolpropane.
  • diamines such as 4,4'-methylene-bis (3-chloro-2,6-diethylaniline) (MCDEA) or 4,4'-methylene bis (2-chloroaniline) (MOCA)
  • short-chain Diols such as 1, 4 butanediol, 1, 2 ethanediol, 1, 3 propanediol or trifunctional products such as trimethylolpropane.
  • Suitable additives for the modification of the polyurethane are various substance classes in various states of aggregation such as, for example, perfluoropolyethers (trade name eg polysec c, liquid), polytetrafluoroethylene (PTFE, trade name, eg Osixo, powdery), polyethylene (trade name eg Inhance UH-1250, particulate) or bifunctional perfluoropolyether (trade name eg Fluorolink, liquid).
  • perfluoropolyethers trade name eg polysec c, liquid
  • PTFE polytetrafluoroethylene
  • polyethylene trade name eg Inhance UH-1250, particulate
  • bifunctional perfluoropolyether trade name eg Fluorolink, liquid
  • additives 1 to 20% by weight may be added to obtain a modification of the polyurethane in the desired manner. Since the surface energy decreases with increasing additive content, the highest possible additive content is desirable. A limit is set only by the cost of the additive, which are experience very high. In addition to the reduction of the surface energy and the resulting reduced soil and water adhesion, it was surprisingly also possible to observe an improved resistance to hydrolysis and chemical resistance as well as an improvement in the mechanical properties of roll covers designed according to the invention.

Landscapes

  • Paper (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

L'invention concerne un rouleau pour une partie de pressage d'une machine destinée à fabriquer et/ou à améliorer une bande de matière fibreuse telle qu'une machine à papier, à carton ou à tissu ouaté. Ledit rouleau comprend un corps ou une enveloppe et un revêtement agencé sur le corps ou l'enveloppe, lequel revêtement comporte au moins une couche fonctionnelle qui est adaptée à entrer en contact avec la bande de matière fibreuse ou une toile d'une machine à papier. La couche fonctionnelle est constituée d'un polymère, lequel est un mélange fait d'au moins un prépolymère, un durcisseur, un agent de réticulation et un additif.
EP13721295.7A 2012-04-27 2013-04-24 Rouleau presseur présentant un revêtement en polyuréthane Active EP2841647B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012207059 2012-04-27
PCT/EP2013/058512 WO2013160358A1 (fr) 2012-04-27 2013-04-24 Rouleau presseur présentant un revêtement en polyuréthane

Publications (2)

Publication Number Publication Date
EP2841647A1 true EP2841647A1 (fr) 2015-03-04
EP2841647B1 EP2841647B1 (fr) 2017-11-15

Family

ID=48326266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13721295.7A Active EP2841647B1 (fr) 2012-04-27 2013-04-24 Rouleau presseur présentant un revêtement en polyuréthane

Country Status (4)

Country Link
US (1) US9267235B2 (fr)
EP (1) EP2841647B1 (fr)
CN (1) CN104334796B (fr)
WO (1) WO2013160358A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114514350A (zh) * 2019-10-15 2022-05-17 维美德技术有限公司 辊罩及其用途

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015216503A1 (de) * 2015-08-28 2017-03-02 Voith Patent Gmbh Walzenbezug sowie Auftragswalze umfassend einen solchen
DE102016201344A1 (de) * 2016-01-29 2017-08-03 Voith Patent Gmbh Pressmantel und Verfahren zur Herstellung eines solchen
DE102016114013A1 (de) * 2016-07-29 2018-02-01 Voith Patent Gmbh Walzenbezug sowie Walze und deren Verwendung
FI128303B (en) * 2017-11-28 2020-03-13 Valmet Technologies Oy ROLLER AND ITS USE
DE102018118052A1 (de) * 2018-07-26 2020-01-30 Voith Patent Gmbh Mantel, dessen Verwendung für eine Breitstreckwalze und Breitstreckwalze
DE102018122782A1 (de) * 2018-09-18 2020-03-19 Voith Patent Gmbh Pressmantel, dessen Verwendung sowie Presswalze und Schuhpresse
DE102018122778A1 (de) * 2018-09-18 2020-03-19 Voith Patent Gmbh Verfahren zur Herstellung eines Mantels für eine Breitstreckwalze, Breitstreckwalze sowie Verwendung einer solchen

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CN1017637B (zh) * 1985-04-23 1992-07-29 美商贝洛特公司 聚氨酯覆盖式造纸机轧辊
FI80097B (fi) * 1988-04-28 1989-12-29 Valmet Paper Machinery Inc Vals i presspartiet av en pappersmaskin och foerfarande foer framstaellning av denna.
US5895806A (en) 1996-05-06 1999-04-20 Uniroyal Chemical Company, Inc. Polyurethane composition useful for coating cylindrical parts
US5837359A (en) * 1996-06-03 1998-11-17 The Mearl Corporation Satin and tinted satin iridescent films
US6027769A (en) 1998-08-24 2000-02-22 Gajewski; Vincent J. Method for producing cylindrical objects of multilayer dissimilar compositions without interfaces
WO2009103301A2 (fr) * 2006-12-18 2009-08-27 Voith Patent Gmbh Revêtement de cylindre et son procédé de production
DE102007000505A1 (de) * 2007-10-15 2009-04-16 Voith Patent Gmbh Walzenbelag mit füllstoff- und faserverstärktem Polyurethanelastomer
DE102009028215B3 (de) 2009-08-04 2010-09-09 Voith Patent Gmbh Kombination eines Pressfilzes mit einem Presswalzenbezug und/oder einem Saugwalzenbezug für eine Papiermaschine
FI20096355A0 (fi) * 2009-12-18 2009-12-18 Metso Paper Inc Kuiturainakoneen osassa käytettävä pinnoite
FI20115400A (fi) * 2011-04-26 2012-10-27 Metso Paper Inc Telapinnoite ja menetelmä sen valmistamiseksi
DE102011082849A1 (de) * 2011-09-16 2013-03-21 Voith Patent Gmbh Walze mit Walzenbezug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013160358A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114514350A (zh) * 2019-10-15 2022-05-17 维美德技术有限公司 辊罩及其用途

Also Published As

Publication number Publication date
CN104334796A (zh) 2015-02-04
US20150041093A1 (en) 2015-02-12
US9267235B2 (en) 2016-02-23
EP2841647B1 (fr) 2017-11-15
WO2013160358A1 (fr) 2013-10-31
CN104334796B (zh) 2017-06-13

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