EP1556536B1 - Verfahren und vorrichtung zur stabilisierung von rändern eines vliesstoffes - Google Patents

Verfahren und vorrichtung zur stabilisierung von rändern eines vliesstoffes 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
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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
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English (en)
French (fr)
Other versions
EP1556536A2 (de
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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Publication date
Application filed by Tenotex SpA filed Critical Tenotex SpA
Publication of EP1556536A2 publication Critical patent/EP1556536A2/de
Application granted granted Critical
Publication of EP1556536B1 publication Critical patent/EP1556536B1/de
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. Verfahren zur Stabilisierung von Rändern eines Vliesstoffs, wobei der Stoff erhalten wird (A) durch ständiges Entwirren oder Spinnen langer Fasern (Fl), Legen (B) dieser langen Fasern (Fl), über eine bewegliche Tragfläche (3) mit einer vorbestimmten Fördergeschwindigkeit (S) zur Bildung eines Gewebes (V) mit im wesentlichen gerade Seitenlinien (B, B'), Legen (C) einer kurzfasrigen Lage (Fc) auf das Gewebe (V), Verbinden (E) dieser kurzen Lage (Fc) mit dem Gewebe (V) zur Bildung des Vliesstoffs, dadurch gekennzeichnet, dass vor dem Legen (C) der kurzen Fasern die Seitenränder (B, B') des Gewebes zumindest teilweise abgeschirmt und gedrückt werden gegen die bewegliche Tragfläche (3) um kurze Fasern daran zu hindern in diesen Bereichen abgelegt zu sein und um jegliche aerodynamische Turbulenz zu beseitigen und auch die Stabilität zu erhöhen und um Knitter oder Falten in dem Stoff entlang den Rändern (B, B') zu verhindern unabhängig von der Zuführgeschwindigkeit und von der Länge der langen Fasern, die gelegt wurden.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass das Abschirmen und Drücken entlang der langen Ränder (B, B') des Gewebes (V) erfolgt über eine Länge, die mindestens dem Bereich entspricht, in dem die kurzen Fasern liegen.
  3. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass das Abschirmen und Drücken entlang der langen Ränder (B, B') des Gewebes erfolgt über eine vorbestimmte Mindestbreite (W).
  4. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass das Abschirmen und Drücken auf die Ränder (B, B') ausgeübt wird von einem Paar länglicher Platten (10, 10'), die über den Seitenrändern (B, B') liegen in Anlage an dem Förderband ohne die freie Zufuhr des Gewebes (V) zu behindern..
  5. Verfahren gemäß Anspruch 3, dadurch gekennzeichnet, dass die vorbestimmte minimale Abschirm- und Drückbreite (W) von 10 bis 100 mm ist.
  6. Verfahren gemäß Anspruch 4, dadurch gekennzeichnet, dass der Druck der Platten (10, 10') gegen die bewegliche Tragfläche (3) eingestellt werden kann durch Ändern des Drucks, der entlang den Rändern ausgeübt wird, entsprechend der Gewebeart.
  7. Verfahren gemäß Anspruch 4, dadurch gekennzeichnet, dass die überschüssigen kurzen Fasern auf der beweglichen Tragfläche (3) beseitigt werden durch Saugen, stromabwärts von dem Bereich, in dem die kurzen Fasern liegen, außerhalb der Geweberänder (B, B'), im wesentlichen in Reihe mit den Abschirm- und Drückplatten (10, 10'), um die langen Fasern des Gewebes (V) zu hindern auch eingenommen zu werden.
  8. Verfahren gemäß einem oder mehrerer der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die kurzen Fasern Holzänteile enthalten.
  9. Vorrichtung zur Stabilisierung von Rändern (B, B') eines Vliesstoffs zur Durchführung des Verfahrens gemäß einem oder mehrerer der vorhergehenden Ansprüche, wobei diese Vorrichtung anwendbar ist auf eine Einheit (2) zum Legen kurzer Fasern, die stromabwärts einer Station zum ständigen Spinnen eines Gewebes (V) aus langen Fasern angeordnet ist, angetrieben ist auf einer beweglichen Tragfläche (3), und diese Vorrichtung gekennzeichnet ist durch Einrichtungen (6, 6') zum Abschirmen und Drücken der länglichen Ränder des Gewebes im Bereich der kurzen Fasern, um diese zu hindern, entlang dieser Ränder gelegt zu werden und die Stabilität des Gewebes zu erhöhen und um so Knitter oder Falten darauf zu verhindern.
  10. Vorrichtung gemäß Anspruch 9, dadurch gekennzeichnet, dass die Einrichtungen (6, 6') zum Abschirmen und Drücken über dem Band entlang der Einheit angeordnet sind, um die Fasern des Gewebes gegen die bewegliche Tragfläche (3) zu drücken.
  11. Vorrichtung gemäß Anspruch 10, dadurch gekennzeichnet, dass die Einrichtungen (6, 6') zum Abschirmen und Drücken lösbar gesichert sind an der Einheit (2) zum Legen kurzer Fasern durch geeignete Verbindungseinrichtungen (7).
  12. Vorrichtung gemäß Anspruch 11, dadurch gekennzeichnet, dass die Verbindungseinrichtungen (7) angeordnet sind in einem einstellbaren transversalen Abstand um mit der Breite des Gewebes (V) überein zu stimmen.
  13. Vorrichtung gemäß Anspruch 11, dadurch gekennzeichnet, dass die Verbindungseinrichtungen (7) Einstelleinrichtungen enthalten, um den auf die Ränder ausgeübten Druck zu steuern.
  14. Vorrichtung gemäß Anspruch 11, dadurch gekennzeichnet, dass die Einrichtungen (6, 6') zum Abschirmen und Drücken mindestens ein Paar länglichen Platten (10, 10') mit gekrümmten Endabschnitten umfassen, die Torsionsfedern bilden mit einem Endbereich, der an die Einstelleinrichtungen gesichert ist.
  15. Vorrichtung gemäß Anspruch 14, dadurch gekennzeichnet, dass diese Platten eine Breite (H) von mehr als mindestens 10 mm aufweisen.
  16. Vorrichtung gemäß Anspruch 14, dadurch gekennzeichnet, dass die Einstelleinrichtungen Stifte (8, 9) umfassen zum Drehen der Endabschnitte (11, 12) der Platten (10, 10'), wobei die Stifte (8, 9) ausgebildet sind, um Biegemomente auszuüben, die auf im wesentlichen senkrechte Ebenen dieser Abschnitte wirken.
  17. Vorrichtung gemäß Anspruch 14, dadurch gekennzeichnet, dass die Blätter (10, 10') aus einem federnden metallischen Material, wie zum Beispiel Stahl, gefertigt sind oder aus einem elastischen synthetischen Material, wie zum Beispiel verstärkter Kunststoff.
  18. Vorrichtung gemäß Anspruch 9, dadurch gekennzeichnet, dass Einrichtungen (16) vorgesehen sind zum Absaugen überschüssiger kurzer Fasern auf der beweglichen Tragfläche (3), wobei diese Einrichtungen zum Absaugen aus mindestens einem Paar Einlässe (16) besteht, die an gegenüber liegenden Seiten mit Bezug zu der beweglichen Tragfläche (3) angeordnet sind mit einem vorbestimmten Abstand von den Rändern (B, B') im wesentlichen in Reihe mit den Blättern (6, 6') zum Abschirmen und Drücken, um die langen Fasern des Gewebes daran zu hindern auch eingesaugt zu werden und die Einlässe zu verstopfen.
  19. Maschine zum Herstellen von Vliesstoff mit stabilisierten Rändern, mit einer Station zum ständigen Spinnen langer Fasern, einer Einheit zum Legen kurzer Fasern auf das Gewebe, einer Station zum Verbinden der kurzen Fasern mit dem Gewebe zur Bildung des Vliesstoffs, dadurch gekennzeichnet, dass eine Vorrichtung zur Stabilisierung des geweberands vorgesehen ist gemäß einem oder mehreren der Ansprüche 9 bis 18.
  20. Vliesstoff mit einem Gewebe aus Carded oder gesponnen langen Fasern, die von einer Lage kurzer Fasern üpberdeckt ist, die mit dem Gewebe aus langen Fasern verwoben sind, dadurch gekennzeichnet, dass längliche Seitenränder (B, B') vorgesehen sind, die nach dem Verfahren und mit der Vorrichtung gemäß einem oder mehreren der Ansprüche 1 bis 18 stabilisiert sind und durch Verwendung einer Maschine gemäß Anspruch 19.
EP03799046A 2002-10-01 2003-10-01 Verfahren und vorrichtung zur stabilisierung von rändern eines vliesstoffes Expired - Lifetime EP1556536B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT000209A ITVI20020209A1 (it) 2002-10-01 2002-10-01 Metodo e dispositivo per la stabilizzazione dei bordi di un velo di tessuto non tessuto.
ITVI20020209 2002-10-01
PCT/IB2003/004343 WO2004031463A2 (en) 2002-10-01 2003-10-01 Method and device for stabilizing the edges of a nonwoven web

Publications (2)

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

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Application Number Title Priority Date Filing Date
EP03799046A Expired - Lifetime EP1556536B1 (de) 2002-10-01 2003-10-01 Verfahren und vorrichtung zur stabilisierung von rändern eines vliesstoffes

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700044228A1 (it) * 2017-04-21 2018-10-21 Simec Spa Linea di resinatura per la realizzazione di lastre in materiale lapideo o ceramico rinforzate
WO2018193416A1 (en) * 2017-04-21 2018-10-25 Simec S.P.A. Resin line for manufacturing reinforced stone or ceramic slabs
CN115262260B (zh) * 2022-08-03 2024-09-27 欣盛(浙江)无纺科技有限公司 一种可冲散非织造材料专用的调浆机

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
AU2176600A (en) * 1998-12-10 2000-06-26 Kimberly-Clark Worldwide, Inc. An absorbent structure including a thin, calendered airlaid composite and a process for making the composite
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
DE60304367D1 (de) 2006-05-18
DE60304367T2 (de) 2006-12-21
ES2262025T3 (es) 2006-11-16
AU2003265072A8 (en) 2004-04-23
ATE321906T1 (de) 2006-04-15
WO2004031463A2 (en) 2004-04-15
WO2004031463A3 (en) 2004-05-21
ITVI20020209A1 (it) 2004-04-02
AU2003265072A1 (en) 2004-04-23
EP1556536A2 (de) 2005-07-27

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