EP0972876B1 - Améliorations portant sur des toiles de machine à papier - Google Patents

Améliorations portant sur des toiles de machine à papier Download PDF

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Publication number
EP0972876B1
EP0972876B1 EP99305526A EP99305526A EP0972876B1 EP 0972876 B1 EP0972876 B1 EP 0972876B1 EP 99305526 A EP99305526 A EP 99305526A EP 99305526 A EP99305526 A EP 99305526A EP 0972876 B1 EP0972876 B1 EP 0972876B1
Authority
EP
European Patent Office
Prior art keywords
layer
areas
fabric according
fabric
paper
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.)
Expired - Lifetime
Application number
EP99305526A
Other languages
German (de)
English (en)
Other versions
EP0972876A3 (fr
EP0972876A2 (fr
Inventor
Ian Christison Sayers
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 Fabrics Heidenheim GmbH and Co KG
Original Assignee
Voith Fabrics Heidenheim GmbH and Co KG
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 Fabrics Heidenheim GmbH and Co KG filed Critical Voith Fabrics Heidenheim GmbH and Co KG
Publication of EP0972876A2 publication Critical patent/EP0972876A2/fr
Publication of EP0972876A3 publication Critical patent/EP0972876A3/fr
Application granted granted Critical
Publication of EP0972876B1 publication Critical patent/EP0972876B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • 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
    • D21F1/0063—Perforated sheets

Definitions

  • This invention relates to improvements in papermaking fabrics.
  • WO 96/35018 discloses a process of forming patterned or decorative markings on tissues including the use of a forming fabric with areas of relatively slow water drainage. Where a fibre slurry containing both relatively long and relatively short fibres is used, the provision of areas of different water drainage rates causes the markings to be delineated by areas of different fibre composition, or shorter fibre lengths, preferably avoiding areas of slower drainage.
  • the areas of relatively slow water drainage are provided by providing additional filaments over or within the fabric weave pattern, or by a film or coating which blocks or fills void space within the fabric. The area does not necessarily protrude from the surface of the fabric.
  • An object of this invention therefore is to provide a papermaking fabric which can enable such effects to be achieved.
  • a papermaking fabric comprises a paper-contacting surface layer of partially fused particles, the paper-contacting layer having a surface which comprises areas which are proud of or recessed relative to the main plane of the paper-contacting surface.
  • the invention provides a fabric comprising a base layer or substrate, having decoratively shaped areas on the web contacting surface, said areas comprising sintered particles which are fused or bonded to the substrate.
  • the surface layer is normally supported by a base layer which may be a woven or nonwoven fabric, or a membrane (which may be perforated or in the form of a grid) of nonwoven material such as a sheet of a synthetic plastics material.
  • a base layer which may be a woven or nonwoven fabric, or a membrane (which may be perforated or in the form of a grid) of nonwoven material such as a sheet of a synthetic plastics material.
  • the surface layer of partially fused particles may include a reinforcing textile structure which is fully or partially embedded in the layer of partially fused particles.
  • the partially fused particles may form a sintered matrix, and be composed of sintered polymer or metal particles or fibres, or a mix of particles and fibres.
  • the reinforcing textile structure may comprise a woven or nonwoven fabric, or a random but generally uniform dispersion of chopped fibres.
  • the fibres or yarns of the reinforcing structure may be bicomponent structures incorporating materials of different melting point.
  • the fibres or yarns may preferably have a higher melting point than the reinforcing structure.
  • Raised areas may be provided by forming an additional thickness of the sintered matrix having the same density and thus the same drainage flow rate as the main body of the matrix.
  • recessed areas may be provided by omission of a thickness of the sintered matrix so that the matrix again has the same density and drainage flow rate as the main body of the matrix.
  • the raised and/or recessed areas may be provided by moulding of the paper-contacting surface of the sintered matrix, e.g. using a patterned platten or roller to impress the surface.
  • recessed areas will have a greater density and thus reduced drainage flow rate than the main body of the matrix, and raised areas will have a lesser density and thus increased drainage flow rate with respect to the main body of the matrix.
  • the fabric is to be used as a dryer fabric, for example in a through-air-dryer, it is to be noted that the air permeability is the relevant quality which is determined by the matrix density, rather than the drainage rate.
  • a support or base fabric which can be a woven fabric, a nonwoven fabric, a membrane or perforated or reticulated membrane or a composite of one or more layers of any of the said materials.
  • a layer 11 is provided on at least the paper-contacting side of the base fabric 10 which is formed of a layer of sintered particles and/or fibres of a suitable plastics material such as polyethylene or polypropylene or other materials such as set out in EP-A-653512.
  • This layer of sintered material has the fabric 10 embedded wholly within it to form a textile reinforcement structure which is shown diagrammatically as a conventional representation of a woven fabric.
  • a nonwoven scrim or a dispersion of chopped fibres may be used instead or additionally.
  • the paper-contacting surface 13 has a general or median level 14, to which most of the surface conforms. However, selected raised areas 15 stand proud of the surface level 14, whilst other areas 16 are recessed below the surface level 14. These proud and recessed areas preferably form a pattern which will have a decorative or a functional effect on a paper web formed or carried on the surface 13.
  • the proud and recessed areas are formed by moulding of the layer 11 during the process of forming the layer, so that extra material is provided in the raised areas 15, whilst less material is provided in the recessed areas 16. Consequently, the sintered material has essentially the same density in the raised areas 15 and in the recessed areas 16 as elsewhere in the layer 11.
  • the fabric according to Fig. 1 produces an embossing effect on any tissue or web formed or carried on the fabric due to the effect of the raised and/or lowered areas. Either the raised areas, or the recessed areas may be omitted.
  • a papermachine fabric comprises a base layer 20, which may be any one of the options suggested in the description of Fig. 1 above.
  • the base layer 20 carries a layer 21 which consists of a layer of sintered particles and/or fibres of a suitable plastics material, or of a sintered metal, as discussed in EP-A-653512.
  • the base layer 10 comprises a reinforcing fabric 22 which is wholly embedded within the sintered layer 21 and may be a woven or nonwoven fabric, or a dispersion of chopped fibres, but is shown as a conventional representation of a woven fabric.
  • Layer 21 has a paper-contacting surface 23 which has a general or median plane 24. The surface 23 carries raised areas 25, and recessed areas 26, as in Fig. 1.
  • these areas are formed by embossing the layer 21 after formation using a roller or platten press. Consequently the parts of layer 21 below raised areas 25 are less densely compressed than the main part of the layer 21, and the parts of layer 21 below recessed areas 26 are more densely compressed than the main part of the layer 21. This is symbolised by less dense hatching of the raised parts and more dense hatching of the recessed parts.
  • the air permeability and water drainage flow rate are differentially effected, so that the fabric not only embosses any tissue formed or carried thereon, but also introduces marking due to different fibre deposition patterns.
  • Fig. 3 illustrates a third embodiment, where discrete areas 30 of sintered particles and/or fibres of metal or plastics material are bonded direct to a base layer 31.
  • the base layer 31 may again be a substrate comprised of a woven or nonwoven fabric, or a membrane, or a composite of such layers.
  • the general or median level 32 of the paper-contacting face of the fabric is provided by the substrate, and raised areas are provided by the discrete areas 30.
  • the present invention allows an embossing fabric to be made by a quick single step process and due to integral formation of the decoratively shaped areas from the material forming the web-contacting surface, the resistance of the areas to delamination is increased.
  • the sintered areas offer greater resistance to wear than the materials used in the prior art referred to above, and thus the initial distinction of the embossed pattern is maintained over a much greater period.
  • Drainage or permeability is varied in the decoratively shaped areas in a highly controlled manner by varying the density of the sintered material.

Landscapes

  • Laminated Bodies (AREA)
  • Paper (AREA)

Claims (14)

  1. Toile de machine à papier comprenant une couche superficielle au contact du papier (11 ; 21) dont au moins certaines zones sont formées à partir d'une couche de particules partiellement fondues, la couche superficielle au contact du papier ayant une surface comprenant des zones (15, 16 ; 25, 26) en saillie ou en retrait par rapport à un plan principal (14 ; 26) de la surface au contact du papier.
  2. Toile de machine à papier comprenant une couche de base (31) ou substrat ayant des zones (30) de forme discrète sur la face de la toile au contact avec le papier, lesdites zones formées comprenant des particules frittées qui sont solidarisées au substrat.
  3. Toile selon la revendication 1, dans laquelle ladite couche superficielle (11 ; 21) est supportée par une couche de base (10 ; 20).
  4. Toile selon la revendication 3, dans laquelle la couche de base (10 ; 20) comprend un matériau textile tissé ou non tissé.
  5. Toile selon la revendication 3, dans laquelle la couche de base (10 ; 20) comprend une membrane de matériau en feuille non tissée.
  6. Toile selon la revendication 5, dans laquelle ladite membrane comprend une feuille de matériau plastique synthétique qui est perforé ou sous forme de grille.
  7. Toile selon la revendication 1, dans laquelle la couche de particules partiellement fondues englobe une structure textile de renfort (22) qui est complètement ou partiellement noyée dans la couche de particules partiellement fondues.
  8. Toile selon la revendication 7, dans laquelle les particules partiellement fondues forment une matrice frittée, et se compose de particules frittées et/ou de fibres d'un ou de plusieurs matériaux polymères, ou un mélange desdites particules et fibres.
  9. Toile selon la revendication 7, dans laquelle la structure de textile de renfort comprend une toile tissée ou non tissée, ou une dispersion aléatoire, mais généralement uniforme, de fibres hachées.
  10. Toile selon la revendication 9, dans laquelle la structure textile de renfort comprend des fibres ou des fils constituant des structures à deux composantes et intégrant des matériaux de point de fusion différents.
  11. Toile selon l'une quelconque des revendications précédentes, dans laquelle la structure textile de renfort est constituée par la couche de base (10 ; 20 ; 31).
  12. Toile selon la revendication 1, dans laquelle des zones en saillie et en retrait (15, 16 ; 25, 26) sont prévues dans ladite couche superficielle (11 ; 21).
  13. Toile selon la revendication 12, dans laquelle lesdites zones en saillie (15 ; 25) sont prévues par formation d'une épaisseur supplémentaire d'une matrice frittée ayant la même densité et le même débit de drainage que le corps principal de laite couche de particules partiellement fondues, et lesdites zones en retrait (16 ; 26) sont constituées par omission d'une épaisseur de la matrice frittée.
  14. Toile selon la revendication 12, dans laquelle lesdites zones en saillie et/ou en retrait (15, 16 ; 25, 26) sont constituées par moulage de ladite surface en contact avec le papier (13 ; 23) de la couche de particules partiellement fondues.
EP99305526A 1998-07-14 1999-07-12 Améliorations portant sur des toiles de machine à papier Expired - Lifetime EP0972876B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9815142 1998-07-14
GBGB9815142.6A GB9815142D0 (en) 1998-07-14 1998-07-14 Improvements in papermaking fabrics

Publications (3)

Publication Number Publication Date
EP0972876A2 EP0972876A2 (fr) 2000-01-19
EP0972876A3 EP0972876A3 (fr) 2001-02-07
EP0972876B1 true EP0972876B1 (fr) 2004-01-28

Family

ID=10835406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99305526A Expired - Lifetime EP0972876B1 (fr) 1998-07-14 1999-07-12 Améliorations portant sur des toiles de machine à papier

Country Status (4)

Country Link
EP (1) EP0972876B1 (fr)
AT (1) ATE258617T1 (fr)
DE (1) DE69914413T2 (fr)
GB (1) GB9815142D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024401B3 (de) * 2008-05-20 2010-01-07 Hans Grossmann Entwässerungssieb für eine Saugwalze einer Papiermaschine
US8293072B2 (en) 2009-01-28 2012-10-23 Georgia-Pacific Consumer Products Lp Belt-creped, variable local basis weight absorbent sheet prepared with perforated polymeric belt

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7514030B2 (en) 2002-12-30 2009-04-07 Albany International Corp. Fabric characteristics by flat calendering
CN102209813B (zh) 2008-09-11 2016-09-21 阿尔巴尼国际公司 用于面巾纸、纸巾及非织造物生产的可透性带
CA2736770C (fr) 2008-09-11 2017-03-28 Albany International Corp. Tissu industriel et procede pour sa fabrication
US8728280B2 (en) 2008-12-12 2014-05-20 Albany International Corp. Industrial fabric including spirally wound material strips with reinforcement
US8764943B2 (en) 2008-12-12 2014-07-01 Albany International Corp. Industrial fabric including spirally wound material strips with reinforcement
CN102317525A (zh) 2008-12-12 2012-01-11 阿尔巴尼国际公司 包括螺旋缠绕材料条带的工业织物
BRPI1007356B1 (pt) 2009-01-28 2020-11-03 Albany International Corp. tecidos industriais para produção de não tecidos
FR3024166A1 (fr) * 2014-07-24 2016-01-29 Kerquest Procede de fabrication d'un objet a matrice fibreuse et objet obtenu
US12162211B2 (en) 2020-01-31 2024-12-10 Kimberly-Clark Worldwide, Inc. Methods of adhering fused deposition modeling 3D printed elements on fabrics

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH509465A (de) * 1970-06-18 1971-07-15 Marx Gmbh J J Gewebe- oder Vliesband, insbesondere Nass- oder Trockenfilz für Papier- und Zellstoffmaschinen
EP0653235A1 (fr) * 1993-11-16 1995-05-17 Scapa Group Plc Filtre
ATE163453T1 (de) * 1993-11-16 1998-03-15 Scapa Group Plc Papiermaschinenbespannung
US6203663B1 (en) 1995-05-05 2001-03-20 Kimberly-Clark Worldwide, Inc. Decorative formation of tissue
GB9717215D0 (en) * 1997-08-15 1997-10-22 Scapa Group Plc Papermaking felts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024401B3 (de) * 2008-05-20 2010-01-07 Hans Grossmann Entwässerungssieb für eine Saugwalze einer Papiermaschine
US8293072B2 (en) 2009-01-28 2012-10-23 Georgia-Pacific Consumer Products Lp Belt-creped, variable local basis weight absorbent sheet prepared with perforated polymeric belt

Also Published As

Publication number Publication date
DE69914413D1 (de) 2004-03-04
DE69914413T2 (de) 2005-06-23
GB9815142D0 (en) 1998-09-09
EP0972876A3 (fr) 2001-02-07
ATE258617T1 (de) 2004-02-15
EP0972876A2 (fr) 2000-01-19

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