WO2008118909A1 - Habillage de machine à papier doté d'un renforcement de bord - Google Patents

Habillage de machine à papier doté d'un renforcement de bord Download PDF

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Publication number
WO2008118909A1
WO2008118909A1 PCT/US2008/058135 US2008058135W WO2008118909A1 WO 2008118909 A1 WO2008118909 A1 WO 2008118909A1 US 2008058135 W US2008058135 W US 2008058135W WO 2008118909 A1 WO2008118909 A1 WO 2008118909A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
clothing according
basic structure
clothing
fabric
Prior art date
Application number
PCT/US2008/058135
Other languages
English (en)
Inventor
Robert Eberhardt
Jacqueline Marz
Matthias Schmitt
Lippi A. Fernandes
Sanjay Patel
Marc Begin
Matthew Ryan
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
Priority to AU2008230912A priority Critical patent/AU2008230912A1/en
Priority to CA002681588A priority patent/CA2681588A1/fr
Priority to MX2009010305A priority patent/MX2009010305A/es
Priority to CN200880009857A priority patent/CN101678690A/zh
Priority to EP08744325A priority patent/EP2139699A1/fr
Publication of WO2008118909A1 publication Critical patent/WO2008118909A1/fr
Priority to US12/566,979 priority patent/US20100252217A1/en

Links

Classifications

    • 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
    • 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
    • D21F1/30—Protecting wire-cloths from mechanical damage

Definitions

  • This invention relates to a clothing for a web-processing machine, in particular a paper machine, paperboard machine or tissue machine.
  • the present invention provides a clothing for a web-processing machine, in particular a paper machine, paperboard machine or tissue machine, including a flat basic structure with an upper side and a lower side, and with a coating which is applied to the upper side and/or lower side and includes at least one polymer material, whereby the at least one polymer material is a polyurea, in particular an elastomer polyurea.
  • a coating containing a polyurea By providing a coating containing a polyurea, a coating with a much improved adherence to the basic structure of the clothing, a far higher resistance to abrasion and a far higher resistance to chemicals is provided. The penetration of moisture into the material of the basic structure is prevented by the coating, leading to a clear improvement in the hydrolysis resistance of the clothing that is provided with said coating.
  • inventive clothing is used in this case preferably but not exclusively for applications in which the clothing is exposed to a high level of moisture combined with a high temperature.
  • inventive clothing is used as a dryer fabric or a TAD mesh. It is however also possible that the inventive clothing is a press felt or a forming screen.
  • One embodiment of the invention provides that the coating is applied only in some areas on the upper and/or underside of the basic structure. Alternatively it may be provided that the coating is applied to the entire upper- and/or underside of the basic structure. "In some areas” is to be understood specifically to mean that the coating is applied only to a section of the width of the clothing.
  • the flat basic structure is a fabric.
  • the fabric is hereby formed preferably by monofilament threads.
  • the threads which form the fabric are advantageously covered at least partly, especially completely, by the coating.
  • the entire fabric is covered by the coating in that area in which the coating is applied to the fabric.
  • the threads of the fabric are protected from harmful ambient influences.
  • Thread contact areas are created, for example, when the polyurea coating is applied to that area in which the threads run parallel to each other and touch each other. This clearly improves the dimensional stability of the inventive clothing.
  • the polyurea coating can accumulate also between the threads at the thread crossing points or contact areas and are separated from each other by this coating and are, so to speak, elastically stratified on said coating.
  • the polyurea coating forms an elastic intermediate layer between threads at thread contact or thread crossing points.
  • the inventive clothing In order to produce the inventive clothing it is possible to first produce the basic structure and to subsequently provide the completed basic structure with the coating. If the basic structure for example is in the embodiment of a woven fabric, then the fabric in this scenario is produced - in other words woven - first and is then provided with the coating. [0012] Alternatively it is possible to first provide a portion of the threads which make up the fabric with the coating, and to subsequently interweave the so coated threads during the production of the fabric.
  • the basic structure is permeable for water and air.
  • the coating can be applied in this connection such that the permeability is not affected by said coating, meaning that the clothing in the coated area has the same or essentially the same permeability as in the uncoated area.
  • the permeability of the clothing in the coated area can be lower than the permeability in the uncoated area.
  • the permeability of the clothing in the coated area can be a maximum of 20% less, for example a maximum of 15% less, for example a maximum of 10% less than in the uncoated area. With a fabric this is achieved in particular by filling out the meshes of the fabric in at least some areas.
  • the clothing in the coated area is impermeable for air and water and that the clothing in the uncoated area is permeable. This is achieved in particular by the upper side and the lower side of the basic structure in the coated area being covered completely by the coating.
  • the coating is applied to the basic structure such that the thickness of the clothing in the coated area is equal to or only non-essentially greater than that in the uncoated area.
  • essentially greater is understood to be a clothing thickness in the coated area which is a maximum 15%, in particular a maximum 10% greater than in the uncoated area.
  • the thickness of the coating can be in the range of approximately l ⁇ m to approximately 6 ⁇ m, preferably in the range of approximately 3 ⁇ m to approximately 30 ⁇ m.
  • Layer thicknesses in the range of 1 - 60 ⁇ m are especially advantageous if the clothing is permeable in the area of the coating.
  • the fabric is preferably a three-dimensionally structured fabric, in particular a TAD mesh.
  • the inventive clothing can be used preferably on a tissue machine on which the tissue web is formed on the clothing from the fibrous suspension and the formed tissue web is then conveyed on this clothing as far as the Yankee drying cylinder.
  • the tissue web is charged in this case upstream from the drying cylinder with a hot air current and/or steam current.
  • the fabric For the previously mentioned application it makes sense in particular for the fabric to include polyethylene terephthalate (“PET”) and/or polyamide (“PA”) and/or polyphenylene sulfide (“PPS”) threads. It is therefore possible that the fabric representing the basic structure is formed entirely from threads of one of the PET, PA or PPS materials. It is however also possible that the fabric is formed partially from threads from one of the first of the aforementioned materials and partially from threads of one of the subsequently aforementioned materials.
  • PET polyethylene terephthalate
  • PA polyamide
  • PPS polyphenylene sulfide
  • the inventive coating already possesses the advantageous properties when the polyurea is present in the coating with a weight fraction of 10 % or more.
  • the polyurea is a two-component polyurea, whereby the one component of the two is preferably a diisocyanate and the other of the two components is preferably a diamine.
  • a diamine is advantageous in particular due to its low viscosity, which permits auxiliary materials to be added without the viscosity and the mix behavior being affected thereby.
  • a diisocyanate known under the trade-name Araltide AY 8683.
  • the polyurea is a single-component polyurea.
  • a single- component polyurea of this type may for example be moisture-hardening or moisture- crosslinking.
  • a catalyst can be used to speed up the hardening or cross-linking reaction.
  • Products to be considered as single-component polyurea are for example products produced by "Nitroil Performance Chemicals" under the label "PC MD 8.6" or "PC MD 11".
  • Single or two-component polyurea may for example, be applied onto the basic structure in diluted form or as a solution in an organic solvent.
  • the solvent used in this application is in particular a non-protic solvent.
  • THF Tetrahydrofurane
  • the coating including the polyurea possesses a temperature stability of 18O 0 C to 22O 0 C at a temperature reaction time of at least 2 minutes.
  • temperature stability is to be understood to mean that the coating shows no degradation aspect, visible to the naked eye.
  • a preferred embodiment of the invention provides for the basic structure to be subjected, prior to the coating being applied, to a surface treatment at least at those points which are covered with the coating.
  • the surface treatment can include, either alone or in combination, cleaning with a solvent or by way of corona discharge.
  • the surface treatment can, for example additionally include treatment of the basic structure with atmospheric pressure plasma.
  • the atmospheric pressure plasma is an oxygen plasma.
  • Another advantageous embodiment of the invention provides for the coating to contain an additive which increases the wear stability of the coating and/or reduces the coefficient of friction of the coating.
  • colloidal silicone dioxide, ultra high molecular weight polyethylene (“UHMW PE”) or boronitride can be cited by way of example as additives for use alone or in combination in this connection.
  • the additive in this connection it is particularly advantageous in particular for the additive to include particles, in particular nanoparticles, or for it to be formed by particles, in particular nanoparticles.
  • the coating - when viewed in transverse machine direction - extends from each of the two longitudinal edges in direction toward the center of the clothing to a point where at least the two areas of the clothing are coated which are never in contact with the paper web during operation of the clothing.
  • the coating extends from each of the two longitudinal edges in direction toward the center of the clothing to a point that the two areas of the clothing are coated which only come into contact with the paper web only temporarily while the paper web is in contact with the clothing, for example edge strip areas.
  • a preferred embodiment of the invention thus provides for the basic structure to have transverse edges, which extend in the
  • CMD direction can be joined together in order to render the basic structure endless while constructing a seam region, and for the coating to be applied in the region of the transverse edges.
  • Possible application methods for applying the coating are, for example, dip-coating and subsequent wiping in order to equalize the coating, roll coating, knife-coating, spray coating or extrusion coating.
  • FIG. 1 shows a first embodiment of an inventive clothing in a plan view of its upper side
  • Fig. 2 shows the clothing from Fig. 1 in cross-sectional direction
  • FIG. 3 shows a top view of the upper side of a second embodiment of an inventive clothing
  • Fig. 4 shows a cross-directional view of the clothing depicted in Fig. 3;
  • Fig. 5 is a device for the production of an inventive clothing.
  • the represented clothing 1 is a TAD mesh.
  • the mesh 1 has a flat basic structure which is formed by a permeable fabric 3 woven from PET threads 4 and 5.
  • the mesh 1 includes a coating 6 which is applied respectively in the region of the two longitudinal edges 7 and 8 extending in the machine direction ("MD direction") and in edge areas 10, 11 on the fabric 3 on the upper side 2 and on the lower side 9 (shown only in Fig. T). Between the two coated edge areas 10, 11 is an uncoated area 13.
  • the coating 6 includes a polymer material, which in the example in question is formed by a two-component elastomer polyurea and nanoparticles 12 of boronitride.
  • the wear stability of the coating 6 is increased by the boronitride nanoparticles 12.
  • the coated edge areas 10, 11 extend in this case respectively by approximately 1 inch from the longitudinal edges 7 and 8 in the CMD direction.
  • the coating is applied in this case such that the upper side 2 and the lower side 9 of the fabric 3 in the coated edge areas 10, 11 are covered completely by the coating and the edge areas 10, 11 are impermeable.
  • Fig. 2 shows the mesh 1 from Fig. 1 in the cross-sectional direction (CMD direction) in the region of the coated edge area 10 and the adjacent uncoated area 13 of the fabric 3. It is evident that the thickness of the mesh 1 in the coated edge area 10 is only non- essentially greater than in the uncoated area 13, whereby in the case in question the clothing thickness in the coated edge area 10 is a maximum 5% greater than in the uncoated area 13.
  • Fig. 3 shows a top view of the upper side 102 of one embodiment of an additional inventive clothing 101.
  • the illustrated clothing 1 represents a dryer fabric or TAD mesh.
  • the mesh 101 has a flat basic structure which is formed by a woven and permeable fabric 103 which consists of PET threads 104 and 105.
  • the mesh 101 further includes a coating 106 which is applied respectively onto the top side 102 of the fabric 103 in the edge regions 110, 111 which run along the two longitudinal edges 107 and 108 progressing in MD direction, and onto the underside 109 which is only depicted in Fig. 4.
  • a non-coated area 113 is located between the two coated edge areas 110, 111.
  • the coating 106 includes a polymer material which, in the current example is composed by a single-component, or two-component elastomer polyurea.
  • the two broken lines in the illustration in Fig. 3 separate a paper contact area 114 of the clothing 101. That is, they separate an area which may be brought into contact with a paper web during operation of the inventive mesh 101 from two paper- free areas 115 and 116 with which the paper web is never in contact during operation.
  • the coating 106 - when viewed in cross machine direction (CMD) - extends from each of the two longitudinal edges 107 and 108 in the direction toward the center of the clothing 101 to a point where at least the two areas 115 and 116 of the clothing 101 are coated which are never in contact with the paper web during operation of the clothing 101.
  • the coating 106 even extends from each of the two longitudinal edges 107 and 108 in CMD direction into a section of the paper contact area
  • the coating 106 is applied onto the upper side 102 and the underside
  • the coating 106 has a thickness which may be in the range of approximately l ⁇ m to approximately 60 ⁇ m. The permeability of the clothing
  • the fabric 101 is not substantially affected by the coating 106, so that the fabric 103 has a permeability in the non-coated region 113 which is essentially the same as the permeability in the two coated edge sections 110, 111.
  • Fig. 4 shows the mesh 101 of Fig. 3 in cross direction (CMD-direction) in the area of the coated edge section 110 and the non-coated section 113 of the fabric 103 adjacent to it. It is evident that the coating forms a film which fully covers the threads 104, 105 in the coated edge area 110 and which connects the threads 104, 105 with each other at the thread crossing points 117.
  • Fig. 5 shows a device for the production of an inventive clothing.
  • a continuous basic structure in the embodiment of for example a fabric 203 is stretched between two rolls 204, 205 which are positioned parallel to each other.
  • the fabric 203 Prior to the application of the coating 206 the fabric 203 is pre-treated by way of atmospheric pressure plasma which is produced by a plasma nozzle 207.
  • An applicator roll 209 is used to apply the polyurea coating 206 with which the polyurea which was dissolved in an organic solvent is applied onto the fabric 203.
  • said coating material is, for example, subjected to a heat treatment by way of a dryer 208, causing it to harden or cross-link and forming the coating.

Landscapes

  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne un habillage (1) destiné à une machine de traitement de toile, en particulier à une machine à tissu, comportant une structure plate basique (3) dotée d'un côté supérieur (2) et d'un côté inférieur (9), et doté d'un revêtement (6) qui est appliqué sur le côté supérieur (2) et/ou le côté inférieur (9) et comporte au moins un matériau polymère. Au moins un matériau polymère est une polyrésine, en particulier une polyrésine en élastomère.
PCT/US2008/058135 2007-03-26 2008-03-25 Habillage de machine à papier doté d'un renforcement de bord WO2008118909A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU2008230912A AU2008230912A1 (en) 2007-03-26 2008-03-25 Paper machine clothing with edge reinforcement
CA002681588A CA2681588A1 (fr) 2007-03-26 2008-03-25 Habillage de machine a papier dote d'un renforcement de bord
MX2009010305A MX2009010305A (es) 2007-03-26 2008-03-25 Guarnicion de maquina para fabricar papael con refuerzo de borde.
CN200880009857A CN101678690A (zh) 2007-03-26 2008-03-25 边缘增强的造纸机网毯
EP08744325A EP2139699A1 (fr) 2007-03-26 2008-03-25 Habillage de machine à papier doté d'un renforcement de bord
US12/566,979 US20100252217A1 (en) 2007-03-26 2009-09-25 Paper machine clothing with edge reinforcement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710015055 DE102007015055A1 (de) 2007-03-26 2007-03-26 Papiermaschinenbespannung mit Randverstärkung
DE102007015055.7 2007-03-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/566,979 Continuation US20100252217A1 (en) 2007-03-26 2009-09-25 Paper machine clothing with edge reinforcement

Publications (1)

Publication Number Publication Date
WO2008118909A1 true WO2008118909A1 (fr) 2008-10-02

Family

ID=39719425

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/058135 WO2008118909A1 (fr) 2007-03-26 2008-03-25 Habillage de machine à papier doté d'un renforcement de bord

Country Status (7)

Country Link
EP (1) EP2139699A1 (fr)
CN (1) CN101678690A (fr)
AU (1) AU2008230912A1 (fr)
CA (1) CA2681588A1 (fr)
DE (1) DE102007015055A1 (fr)
MX (1) MX2009010305A (fr)
WO (1) WO2008118909A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009096850A1 (fr) * 2008-02-01 2009-08-06 Metso Paper Inc. Toile de machine à papier et procédés associés incluant la toile

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105951497A (zh) * 2015-09-14 2016-09-21 安徽华宇网业有限公司 一种耐磨扁丝干网
DE102019100268A1 (de) * 2019-01-08 2020-07-09 Voith Patent Gmbh Kantenschutz für eine Papiermaschinenbespannung
CN113174772A (zh) * 2021-05-11 2021-07-27 江苏金呢工程织物股份有限公司 一种造纸毛毯、造纸毛毯的制备方法和造纸机设备
CN115805182B (zh) * 2022-11-08 2023-09-29 鲁普耐特集团有限公司 网衣聚脲涂层的涂层方法、涂层装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506033A (en) * 1993-04-07 1996-04-09 Wangner Systems Corporation Dryer fabric edge seal
US6158576A (en) * 1998-10-15 2000-12-12 Albany International Corp. Endless belt or fabric for use in process control loop
US6217413B1 (en) * 1994-09-30 2001-04-17 3M Innovative Properties Company Coated abrasive article, method for preparing the same, and method of using a coated abrasive article to abrade a hard workpiece
US20020098323A1 (en) * 1998-09-15 2002-07-25 Eric G. Larson Abrasive article with seamless backing
US20020128336A1 (en) * 2001-01-08 2002-09-12 Kolb Brant U. Foam including surface-modified nanoparticles
US20060019567A1 (en) * 2004-07-21 2006-01-26 Voith Fabrics Patent Gmbh Manufacture of papermachine fabrics
US20060182936A1 (en) * 2005-02-15 2006-08-17 Voith Paper Patent Gmbh Method for producing a topographical pattern
US20070044931A1 (en) * 2005-08-26 2007-03-01 Voith Patent Gmbh Process belt with improved on-machine seam

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5506033A (en) * 1993-04-07 1996-04-09 Wangner Systems Corporation Dryer fabric edge seal
US6217413B1 (en) * 1994-09-30 2001-04-17 3M Innovative Properties Company Coated abrasive article, method for preparing the same, and method of using a coated abrasive article to abrade a hard workpiece
US20020098323A1 (en) * 1998-09-15 2002-07-25 Eric G. Larson Abrasive article with seamless backing
US6158576A (en) * 1998-10-15 2000-12-12 Albany International Corp. Endless belt or fabric for use in process control loop
US20020128336A1 (en) * 2001-01-08 2002-09-12 Kolb Brant U. Foam including surface-modified nanoparticles
US20060019567A1 (en) * 2004-07-21 2006-01-26 Voith Fabrics Patent Gmbh Manufacture of papermachine fabrics
US20060182936A1 (en) * 2005-02-15 2006-08-17 Voith Paper Patent Gmbh Method for producing a topographical pattern
US20070044931A1 (en) * 2005-08-26 2007-03-01 Voith Patent Gmbh Process belt with improved on-machine seam

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009096850A1 (fr) * 2008-02-01 2009-08-06 Metso Paper Inc. Toile de machine à papier et procédés associés incluant la toile
EP2250316A1 (fr) * 2008-02-01 2010-11-17 Albany International Corp. Toile de machine à papier et procédés associés incluant la toile
EP2250316A4 (fr) * 2008-02-01 2011-07-20 Albany Int Corp Toile de machine à papier et procédés associés incluant la toile
EP2644770A1 (fr) * 2008-02-01 2013-10-02 Albany International Corp. Procédé pour déterminer la largeur d'une bande de papier
EP2647759A1 (fr) 2008-02-01 2013-10-09 Albany International Corp. Section d'une machine à papier
US8758568B2 (en) 2008-02-01 2014-06-24 Albany International Corp. Papermaking clothing defining a width of a paper web and associated system and method

Also Published As

Publication number Publication date
AU2008230912A1 (en) 2008-10-02
CA2681588A1 (fr) 2008-10-02
MX2009010305A (es) 2009-10-19
EP2139699A1 (fr) 2010-01-06
CN101678690A (zh) 2010-03-24
DE102007015055A1 (de) 2008-10-02

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