EP1556536B1 - Procede et dispositif de stabilisation des bords d'un voile non tisse - Google Patents

Procede et dispositif de stabilisation des bords d'un voile non tisse Download PDF

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Publication number
EP1556536B1
EP1556536B1 EP03799046A EP03799046A EP1556536B1 EP 1556536 B1 EP1556536 B1 EP 1556536B1 EP 03799046 A EP03799046 A EP 03799046A EP 03799046 A EP03799046 A EP 03799046A EP 1556536 B1 EP1556536 B1 EP 1556536B1
Authority
EP
European Patent Office
Prior art keywords
web
edges
fibers
support surface
movable support
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
EP03799046A
Other languages
German (de)
English (en)
Other versions
EP1556536A2 (fr
Inventor
Giancarlo Appiani
Bruno Cometa
Nicola Maglia
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.)
Fiberweb Tenotex SpA
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Tenotex SpA
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Filing date
Publication date
Application filed by Tenotex SpA filed Critical Tenotex SpA
Publication of EP1556536A2 publication Critical patent/EP1556536A2/fr
Application granted granted Critical
Publication of EP1556536B1 publication Critical patent/EP1556536B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length

Definitions

  • the long fibers F l which form the carded web V may be laid over a movable support surface, for instance a belt conveyor which is drive at a predetermined speed S.
  • step D of laying the short fiber F c the longitudinal edges B, B' of the web V are subjected to step C in which the long fibers F l are shielded and compressed along the surface of the conveyor belt 3, to increase the stability and adherence of these web portions and prevent them from being folded or curled.
  • the shielding and compressing action C is exerted on the longitudinal edges B, B' of the web over a length that corresponds at least to the short fiber laying area, and over a predetermined transverse width W.
  • edges of the web V were experimentally found to be properly stabilized with a width W of the shielding and compression regions ranging from 10 to 100 mm.
  • the compression exerted on the edges B, B' may be adjusted according to typology of web W, in such a manner as to allow a free feed thereof.
  • the excess short fibers F c on the conveyor are sucked, upon laying thereof on the web at a predetermined distance from the edges B, B', outside the edge covering and compression area, to prevent long fibers F l of web V from being sucked along, and conveyed back to the fiber laying unit.
  • a device 1 for carding or spinning and laying long fibers F l to form a web V is placed upstream of a unit 2 which lays short fibers F c by using air, to prepare a nonwoven fabric T.
  • Device 1 for treating long fibers F l comprises a carding or spinning unit (not shown) and a unit for laying long fibers F l on a movable support surface.
  • the latter is, for example, a conveyor belt 3 extending between end rollers 4, 5.
  • the short fiber F c laying unit 2 is placed downstream of the device 1 and may use the same conveyor belt 3.
  • the laying device 2 comprises means for shielding and compressing the longitudinal edges of the web, overall designated as 6, 6', located in the short fiber F c laying area, to prevent short fibers from being laid along the edges B, B' and to increase the stability of the web V, thus avoiding any curling or folding thereof in these areas.
  • the shielding and compressing means 6, 6' are removably secured to the short fiber laying unit 2 by appropriate connection means 7, which may be adjusted at a variable transverse distance to fit the width of the web V.
  • the shielding and compressing means 6, 6' comprise a pair of longitudinal plates 10, 10' having curved end portions 11, 12, 11', 12' which define torsion springs secured to the adjustment means 8, 9.
  • plates 10, 10' are made of an elastic metallic material, particularly steel, or of a reinforced or composite plastic material.
  • the device also includes means 16, 16' for suction of excess short fibers laid on the movable support surface, which suction means may consist of intakes 16 located at the opposite sides of the movable support surface 3, outside the edge B, B' covering and compression area.
  • Suction means 16, 16' may be connected by suitable pipes, not shown in the drawings, to the short fiber laying unit 2 to recirculate in this area the exceeding pulp or short fibers F c .
  • the sheets have a transverse width (H) of more than at least 10 mm.
  • H transverse width
  • This provides an increased web stability, prevents wrinkles and folds at the edges and counters any motion generated by the turbulence which is caused by the airlaid unit.
  • the nonwoven fabric T with stabilized edges which is obtained by a device as described above comprises a web V of carded or spun long fibers F l , which is overlaid with a layer of short fibers F c , interwoven with the long fibers of the web V, whose edges B, B' are cleared of short fibers F c , and are continuos, straight, have no folds and curls and no processing scraps.
  • nonwoven fabric edge stabilizing method and device according to the invention allow to achieve the intended objects and particularly to obtain a uniform nonwoven fabric in a cost-effective and reliable manner, even at high feed speeds and high production rates, thereby minimizing the defects of the final product, especially at the edges thereof.
  • this method and device allow to prevent short fibers from being laid at the web edges, and to avoid clogging of the units for recycling them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (20)

  1. Procédé pour stabiliser les bords d'un voile non tissé, dans lequel le tissu est obtenu (A) en cardant ou filant en continu des fibres longues (Fl), en déposant (B) lesdites fibres longues (Fl) sur une surface de support mobile (3) ayant une vitesse d'avancement prédéterminée (S) pour former un voile (V) ayant des bords latéraux sensiblement rectilignes (B, B'), en déposant (C) une couche de fibres courtes (Fc) sur ledit voile (V), en réunissant (E) ladite couche de fibres courtes (Fc) audit voile (V) pour former le tissu non tissé, caractérisé en ce qu'avant de déposer (C) les fibres courtes, on recouvre au moins partiellement les bords latéraux (B, B') du voile (V) et on les comprime au moins partiellement contre la surface de support mobile (3) pour empêcher les fibres courtes de se déposer dans lesdites zones, pour éliminer l'éventuelle turbulence aérodynamique ainsi que pour augmenter la stabilité et pour éviter les boucles ou plis dans le tissu le long de ses bords (B, B') indépendamment de la vitesse d'avancement et de la longueur des fibres longues qui ont été déposées.
  2. Procédé selon la revendication 1, caractérisé en ce que l'action de recouvrement et de compression est exercée le long des bords longitudinaux (B, B') du voile (V) sur une longueur qui correspond au moins à la zone de dépose des fibres courtes.
  3. Procédé selon la revendication 1, caractérisé en ce que l'action de recouvrement et de compression est exercée le long des bords longitudinaux (B, B') du voile sur une largeur transversale minimale prédéterminée (W).
  4. Procédé selon la revendication 1, caractérisé en ce que l'action de recouvrement et compression sur les bords (B, B') est exercée par une paire de plaques longitudinales (10, 10') qui s'étendent au-dessus desdits bords (B, B') en contact avec la courroie transporteuse sans empêcher le libre avancement du voile (V).
  5. Procédé selon la revendication 3, caractérisé en ce que ladite largeur transversale minimale de recouvrement et de compression prédéterminée (W) est de 10 à 100 mm.
  6. Procédé selon la revendication 4, caractérisé en ce que la pression desdites plaques (10, 10') contre la surface de support mobile (3) peut être réglée en modifiant la pression exercée le long desdits bords en fonction du type de voile.
  7. Procédé selon la revendication 4, caractérisé en ce que les fibres courtes en excès sur ladite surface de support mobile (3) sont éliminées par aspiration en aval de ladite zone de dépose des fibres courtes, en dehors des bords (B, B') du voile, sensiblement dans l'alignement desdites plaques de recouvrement et de compression (10, 10') pour éviter que les fibres longues du voile (V) ne soient elles aussi entraînées.
  8. Procédé selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdites fibres courtes comprennent de la pâte de bois.
  9. Dispositif pour stabiliser les bords (B, B') d'un voile non tissé, pour la mise en oeuvre du procédé selon une ou plusieurs des revendications précédentes, lequel dispositif est applicable à une unité (2) de dépose de fibres courtes agencée en aval d'une station destinée à filer en continu un voile de fibres longues (V) entraîné sur une surface de support mobile (3), le dispositif étant caractérisé en ce qu'il comprend des moyens (6, 6') pour recouvrir et comprimer les bords longitudinaux du voile dans la zone de dépose des fibres courtes, de manière à les empêcher de se déposer le long desdits bords et à accroître la stabilité du voile, en évitant ainsi toute boucle ou pli sur ce voile.
  10. Dispositif selon la revendication 9, caractérisé en ce que lesdits moyens de recouvrement et de compression (6, 6') sont agencés au-dessus de ladite courroie, le long de ladite unité, pour comprimer les fibres dudit voile contre ladite surface de support mobile (3).
  11. Dispositif selon la revendication 10, caractérisé en ce que lesdits moyens de recouvrement et de compression (6, 6') sont fixés de façon amovible à ladite unité de dépose de fibres courtes (2) par des moyens de liaison appropriés (7).
  12. Dispositif selon la revendication 11, caractérisé en ce que lesdits moyens de liaison (7) sont positionnés à une distance transversale réglable pour s'ajuster à la largeur du voile (V).
  13. Dispositif selon la revendication 11, caractérisé en ce que lesdits moyens de liaison (7) comprennent des moyens de réglage pour commander la pression exercée sur lesdits bords.
  14. Dispositif selon la revendication 11, caractérisé en ce que lesdits moyens de recouvrement et de compression (6, 6') comprennent au moins une paire de plaques longitudinales (10, 10') ayant des portions d'extrémité recourbées qui définissent des ressorts de torsion dont une extrémité est fixée auxdits moyens de réglage.
  15. Dispositif selon la revendication 14, caractérisé en ce lesdites plaques ont une largeur transversale (H) de plus d'au moins 10 mm.
  16. Dispositif selon la revendication 14, caractérisé en ce que lesdits moyens de réglage comprennent des tiges (8, 9) servant à faire tourner lesdites portions d'extrémité (11, 12) desdites plaques (10, 10'), lesdites tiges (8, 9) étant adaptées pour appliquer auxdites portions des couples de flexion agissant dans des plans sensiblement verticaux.
  17. Dispositif selon la revendication 14, caractérisé en ce que lesdites feuilles (10, 10') sont faites d'une matière métallique élastique telle que l'acier, ou d'une matière synthétique élastique telle qu'un plastique renforcé.
  18. Dispositif selon la revendication -9, caractérisé en ce qu'il comprend des moyens (16) destinés à aspirer des fibres courtes en excès sur ladite surface de support mobile (3), lesdits moyens d'aspiration étant constitués par au moins une paire d'entrées (16) placées sur des côtés opposés de ladite surface de support mobile (3) à une distance prédéterminée desdits bords (B, B'), sensiblement dans l'alignement desdites feuilles de recouvrement et de compression (6, 6') pour éviter que les fibres longues du voile ne soient elles aussi entraînées et ne bouchent lesdites entrées.
  19. Machine pour la fabrication d'un voile non tissé à bords stabilisés, comprenant une station de filage continu d'un voile de fibres longues, une unité destinée à déposer des fibres courtes sur le voile, une station destinée à réunir lesdites fibres courtes audit voile pour former le tissu, caractérisée en ce qu'elle comprend un dispositif de stabilisation des bords du voile selon une ou plusieurs des revendications 9 à 18.
  20. Tissu non tissé comprenant un voile de fibres longues cardées ou filées recouvert d'une couche de fibres courtes qui sont entrelacées avec ledit voile de fibres longues, caractérisé en ce qu'il possède des bords latéraux longitudinaux (B, B') stabilisés par le procédé et le dispositif selon une ou plusieurs des revendications 1 à 18, et en utilisant une machine selon la revendication 19.
EP03799046A 2002-10-01 2003-10-01 Procede et dispositif de stabilisation des bords d'un voile non tisse Expired - Lifetime EP1556536B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITVI20020209 2002-10-01
IT000209A ITVI20020209A1 (it) 2002-10-01 2002-10-01 Metodo e dispositivo per la stabilizzazione dei bordi di un velo di tessuto non tessuto.
PCT/IB2003/004343 WO2004031463A2 (fr) 2002-10-01 2003-10-01 Procede et dispositif de stabilisation des bords d'un voile non tisse

Publications (2)

Publication Number Publication Date
EP1556536A2 EP1556536A2 (fr) 2005-07-27
EP1556536B1 true EP1556536B1 (fr) 2006-03-29

Family

ID=32051261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03799046A Expired - Lifetime EP1556536B1 (fr) 2002-10-01 2003-10-01 Procede et dispositif de stabilisation des bords d'un voile non tisse

Country Status (7)

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EP (1) EP1556536B1 (fr)
AT (1) ATE321906T1 (fr)
AU (1) AU2003265072A1 (fr)
DE (1) DE60304367T2 (fr)
ES (1) ES2262025T3 (fr)
IT (1) ITVI20020209A1 (fr)
WO (1) WO2004031463A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018193416A1 (fr) * 2017-04-21 2018-10-25 Simec S.P.A. Ligne d'application de résine pour la fabrication de dalles en pierre ou en céramique renforcée
IT201700044228A1 (it) * 2017-04-21 2018-10-21 Simec Spa Linea di resinatura per la realizzazione di lastre in materiale lapideo o ceramico rinforzate

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03269150A (ja) * 1990-03-13 1991-11-29 Toyota Motor Corp 繊維マットの製造装置
US5564630A (en) * 1994-06-14 1996-10-15 E. I. Du Pont De Nemours And Company Acceleration arrangement for airlay textile web formers
ES2229811T3 (es) * 1998-12-10 2005-04-16 Kimberly-Clark Worldwide, Inc. Cuerpo absorbente que comprende un material compuesto calandrado, de poco espesor, aplicado neumaticamente y proceso para la fabricacion de dicho material.
FR2803604B1 (fr) * 2000-01-11 2002-03-08 Icbt Perfojet Sa Procede pour la realisation d'un materiau non tisse complexe et nouveau type de materiau ainsi obtenu
US6330735B1 (en) * 2001-02-16 2001-12-18 Kimberly-Clark Worldwide, Inc. Apparatus and process for forming a laid fibrous web with enhanced basis weight capability

Also Published As

Publication number Publication date
ES2262025T3 (es) 2006-11-16
ITVI20020209A1 (it) 2004-04-02
WO2004031463A3 (fr) 2004-05-21
AU2003265072A8 (en) 2004-04-23
EP1556536A2 (fr) 2005-07-27
DE60304367D1 (de) 2006-05-18
DE60304367T2 (de) 2006-12-21
ATE321906T1 (de) 2006-04-15
WO2004031463A2 (fr) 2004-04-15
AU2003265072A1 (en) 2004-04-23

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