EP1682713A1 - Machine de production d'un non-tisse fini - Google Patents

Machine de production d'un non-tisse fini

Info

Publication number
EP1682713A1
EP1682713A1 EP04805310A EP04805310A EP1682713A1 EP 1682713 A1 EP1682713 A1 EP 1682713A1 EP 04805310 A EP04805310 A EP 04805310A EP 04805310 A EP04805310 A EP 04805310A EP 1682713 A1 EP1682713 A1 EP 1682713A1
Authority
EP
European Patent Office
Prior art keywords
sheet
applying
product
conveyor
machine
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
EP04805310A
Other languages
German (de)
English (en)
Other versions
EP1682713B1 (fr
Inventor
Frédéric NOELLE
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.)
Andritz Perfojet SAS
Original Assignee
Rieter Perfojet SAS
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 Rieter Perfojet SAS filed Critical Rieter Perfojet SAS
Publication of EP1682713A1 publication Critical patent/EP1682713A1/fr
Application granted granted Critical
Publication of EP1682713B1 publication Critical patent/EP1682713B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • 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
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet

Definitions

  • the present invention relates to machines for producing nonwovens comprising one or more spun-bond towers and possibly one or more melt-blown heads depositing filaments and possibly fibers in a web on a conveyor.
  • the tablecloth thus deposited and still fragile is then sent to consolidation by water jets.
  • a disadvantage of these machines is that the web which leaves it cannot be sent continuously to a unit for applying a product.
  • the invention overcomes this drawback.
  • the invention therefore relates to a machine for producing a nonwoven continuously, comprising a spun-bond tower depositing filaments in a web on a conveyor and a device for consolidating the web, characterized by a means of expressing the humidity downstream, in the direction of movement of the sheet, of the consolidation device and by a device for applying a product to the sheet downstream of the expressing means.
  • the expressing means is constituted simply by a second conveyor over which passes the sheet and between the upper and lower strands of which is provided a vacuum device, giving in particular a vacuum of between 40 and 700 millibar, subjecting the tablecloth has a suction effect.
  • hydrophobic filaments for example polypropylene, polyethylene or metallocene
  • a surfactant and / or a binder and / or a lubricating agent and / or a blowing agent and / or dye or continuous printing the expression of humidity being sufficient for the product applied by the application device to be applied correctly to the web even if it is made up of hydrophobic filaments .
  • the upper strand of the second conveyor is given a length such, as a function of the speed of passage of the sheet, that the moisture content of the sheet becomes less than 70% by weight, and better still less than 50% and even better still less than 20% at the exit of the second conveyor.
  • This moisture content is generally between 10% and 70% by weight. Unlike what drying would give, it is more than 10%.
  • the length of time the web stays on the second conveyor can be less than 2 seconds for a conveyor whose upper strand has a length of 2 m for example.
  • the machine can comprise downstream of the device for applying a product, a device for drying the sheet, this drying device being able to be made less consequent by the fact that a good part of the humidity has already been expressed the means of expression.
  • the device for applying the product is preferably a device for applying to the foam, or to the licking roller or by spraying which accommodate a residual moisture content of the web.
  • the application is made by longitudinal strips, which creates an alternation of hydrophilic and hydrophobic longitudinal zones for example.
  • a spun-bond tower comprising an extruder of a molten organic polymer supplying a die 1 making it possible to produce a curtain of filaments F, a cooling zone 2 making it possible to obtain at least superficial solidification of the extruded filaments, a device 3 suction in the form of a chamber inside which the curtain of filaments is subjected to the action of high speed air streams which cause the drawing of the filaments, and a diffuser 4 allowing at the outlet of the suction device for deflecting and slowing down the air flow and distributing the filaments F randomly in a sheet deposited on the upper strand 5 of a first endless conveyor 6.
  • the filaments are in the form of a bundle of filaments F, extending perpendicular to the plane of the figure.
  • a horizontal drum 7 is mounted with a device symbolized by the letter A of depression inside.
  • the lateral surface of the drum 7 is perforated.
  • the drum is rotated relative to its axis.
  • the drum is surrounded by a perforated sleeve.
  • Two injectors 8 project jets of pressurized water onto the lateral face of the drum, the layer of filaments that can pass between the drum 7 and the injectors 8 and thus be consolidated.
  • the jets can have a diameter between 80 and 170 microns.
  • the number of jets per meter can be between 1,000 and 5,000 and the water pressure in the injectors can be between 10 and 400 bar, while the vacuum in the drum 7 can be between minus 20 millibar and less 200 millibar and the drum 7 can be driven at a speed between 1 and 400 m / min.
  • the ply then passes over the upper strand 9 of a second conveyor 10 to go to a second drum 11 of the same structure and the same operation as the drum 7. From the drum 11, the ply passes over a drum 12 provided like the drum 11 injectors.
  • the drum 12 is similar to the drum 11 in its structure and in its operation.
  • the sheet is sent directly to a second conveyor 15 provided with a device 16 for expressing humidity, namely a box in which a vacuum of 600 millibar prevails and interposed between the upper strand and the lower strand of the second conveyor 15.
  • the upper face of the box has a slit extending transversely opposite the entire web passing over the conveyor and through which the moisture from the latter is sucked.
  • the upper strand has a length of 3 m.
  • the sheet passes there at a speed of 200 m per minute.
  • a device 17 for applying an ennobling product which comprises a station 18 for the actual application of the product, a station 19 for drying and a station 20 for winding. A ready-to-use nonwoven is thus obtained continuously.

Abstract

Dans cette machine de production d’un nontissé comprenant une tour (1 à 4) spun-bond et un convoyeur (6), il est prévu en aval d’un dispositif (7, 8, 11) de consolidation, un moyen (16) d’exprimage de l’humidité de la nappe et un dispositif (17) d’application d’un produit à la nappe en aval du moyen (16) d’exprimage.

Description

MACHINE DE PRODUCTION D'UN NON-TISSE FINI
La présente invention se rapporte aux machines de production de nontissés comprenant une ou plusieurs tours spun-bond et éventuellement une ou plusieurs têtes melt-blown déposant des filaments et éventuellement des fibres en une nappe sur un convoyeur. La nappe ainsi déposée et encore fragile est envoyée ensuite à une consolidation par jets d'eau. Un inconvénient de ces machines est que la nappe qui en sort ne peut pas être envoyée en continu à une unité d'application d'un produit. L'invention remédie à cet inconvénient. L'invention a donc pour objet une machine de production d'un nontissé en continu, comprenant une tour spun-bond déposant des filaments en une nappe sur un convoyeur et un dispositif de consolidation de la nappe, caractérisée par un moyen d'exprimage de l'humidité en aval, dans le sens de déplacement de la nappe, du dispositif de consolidation et par un dispositif d'application d'un produit à la nappe en aval du moyen d'exprimage. Suivant un mode de réalisation, le moyen d'exprimage est constitué simplement par un deuxième convoyeur sur lequel passe la nappe et entre les brins supérieur et inférieur desquels est ménagé un dispositif à dépression, donnant notamment un vide compris entre 40 et 700 millibar, soumettant la nappe à un effet d'aspiration. Grâce à cela on peut maintenant faire subir en continu à des nappes constituées de filaments hydrophobes par exemple en polypropylène, en polyéthylène ou en métallocène, un traitement ultérieur par un agent tensioactif et/ou un liant et/ou un agent lubrifiant et/ou un agent gonflant et/ou un colorant ou une impression en continu, l'exprimage de l'humidité étant suffisant pour que le produit appliqué par le dispositif d'application s'applique correctement à la nappe même si celle-ci est constituée de filaments hydrophobes. On donne au brin supérieur du deuxième convoyeur une longueur telle, en fonction de la vitesse de passage de la nappe, que la teneur en humidité de la nappe devienne inférieure à 70 % en poids, et mieux inférieure à 50 % et encore mieux inférieure à 20 % à la sortie du deuxième convoyeur. Cette teneur en humidité est en général comprise entre 10% et 70% en poids. A la différence de ce que donnerait un séchage, elle est supérieure à 10%. En général, la durée de séjour de la nappe sur le deuxième convoyeur peut être inférieure à 2 secondes pour un convoyeur dont le brin supérieur a une longueur de 2 m par exemple. La machine peut comprendre en aval du dispositif d'application d'un produit, un dispositif de séchage de la nappe, ce dispositif de séchage pouvant être rendu moins conséquent par le fait qu'une bonne partie de l'humidité a déjà été exprimée dans le moyen d'exprimage. Le dispositif d'application du produit est de préférence un dispositif d'application à la mousse, ou au rouleau lécheur ou par pulvérisation qui s'accommodent d'une teneur résiduelle en humidité de la nappe. De préférence, pour des produits pour l'hygiène, notamment pour des couches bébés, l'application se fait par bandes longitudinales, ce qui crée une alternance de zones longitudinales hydrophiles et hydrophobes par exemple. A la demande de brevet EP-0 072 691 , on prévoit non pas d'exprimer de l'humidité d'une nappe de non-tissé, c'est-à-dire d'en faire sortir une partie de l'eau par un moyen mécanique, mais de sécher une nappe de non-trissé, c'est-à-dire d'en éliminer la presque totalité de l'eau par apport d'énergie calorifique. La figure unique du dessin annexé illustre l'invention. La figure est une représentation schématique en coupe d'une machine suivant l'invention. Elle comprend une tour spun-bond comportant une extrudeuse d'un polymère organique fondu alimentant une filière 1 permettant de produire un rideau de filaments F, une zone 2 de refroidissement permettant d'obtenir la solidification au moins superficielle des filaments extrudés, un dispositif 3 d'aspiration sous la forme d'une chambre à l'intérieur de laquelle le rideau de filaments est soumis à l'action de veines d'air à grande vitesse qui provoquent l'étirage des filaments, et un diffuseur 4 permettant en sortie du dispositif d'aspiration de dévier et ralentir le flux d'air et de répartir les filaments F de manière aléatoire en une nappe se déposant sur le brin 5 supérieur d'un premier convoyeur 6 sans fin. Les filaments se présentent sous la forme d'un faisceau de filaments F, s'étendant perpendiculairement au plan de la figure. Au dessus du brin 5 supérieur, est monté un tambour 7 horizontal avec un dispositif symbolisé par la lettre A de dépression à l'intérieur. La surface latérale du tambour 7 est perforée. Le tambour est entraîné en rotation par rapport à son axe. Le tambour est entouré d'un manchon troué. Deux injecteurs 8 projettent des jets d'eau sous pression sur la face latérale du tambour, la nappe de filaments pouvant passer entre le tambour 7 et les injecteurs 8 et être ainsi consolidée. Les jets peuvent avoir un diamètre compris entre 80 et 170 microns. Le nombre de jets par mètre peut être compris entre 1 000 et 5 000 et la pression d'eau dans les injecteurs peut être comprise entre 10 et 400 bar, tandis que la dépression dans le tambour 7 peut être comprise entre moins 20 millibar et moins 200 millibar et le tambour 7 peut être entraîné à une vitesse comprise entre 1 et 400 m/mn. La nappe passe ensuite sur le brin 9 supérieur d'un deuxième convoyeur 10 pour aller à un deuxième tambour 11 de même structure et de même fonctionnement que le tambour 7. Du tambour 11 , la nappe passe sur un tambour 12 muni comme le tambour 11 d'injecteurs. Le tambour 12 est analogue au tambour 11 dans sa structure et dans son fonctionnement. A la sortie du tambour 12, la nappe est envoyée directement à un deuxième convoyeur 15 muni d'un dispositif 16 d'exprimage de l'humidité, à savoir un caisson dans lequel règne un vide de 600 millibar et interposé entre le brin supérieur et le brin inférieur du deuxième convoyeur 15. La face supérieure du caisson a une fente s'étendant transversalement en regard de toute la nappe passant sur le convoyeur et par laquelle l'humidité de celle-ci est aspirée. Le brin supérieur a une longueur de 3 m.. La nappe y passe à une vitesse de 200 m à la minute. En aval de ce convoyeur est prévu un dispositif 17 d'application d'un produit d'anoblissement qui comporte un poste 18 d'application proprement dit du produit, un poste 19 de séchage et un poste 20 d'enroulage. On obtient ainsi en continu un nontissé prêt à l'emploi.

Claims

REVENDICATIONS
1. Machine de production d'un nontissé en continu comprenant une tour (1 à 4) spun-bond déposant des filaments en une nappe sur un convoyeur (6) et un dispositif (7, 8, 11, 12) de consolidation de la nappe, par jets d'eau, caractérisée par un moyen (15, 16) d'exprimage de l'humidité en aval, dans le sens de déplacement de la nappe, du dispositif (7, 8, 11, 12) de consolidation et par un dispositif (17) d'application d'un produit à la nappe en aval du moyen (15, 16) d'exprimage.
2. Machine suivant la revendication 1 , caractérisée en ce que le moyen d'exprimage comprend un dispositif (16) à dépression, donnant notamment un vide compris entre 40 et 700 millibar, soumettant la nappe à un effet d'aspiration.
3. Machine suivant l'une des revendications 1 ou 2, caractérisée par un dispositif (19) de séchage de la nappe en aval du dispositif (18) d'application d'un produit.
4. Machine suivant l'une des revendications précédentes, caractérisée en ce que le dispositif d'application d'un produit est un dispositif d'application à la mousse ou d'application au rouleau lécheur.
5. Machine suivant l'une des revendications précédentes, caractérisée en ce que le dispositif d'application est un dispositif d'application par bandes longitudinales.
EP04805310.2A 2003-10-31 2004-10-26 Machine de production d'un non-tisse fini Active EP1682713B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0312794A FR2861750B1 (fr) 2003-10-31 2003-10-31 Machine de production d'un nontisse fini.
PCT/FR2004/002753 WO2005042821A1 (fr) 2003-10-31 2004-10-26 Machine de production d’un non-tisse fini

Publications (2)

Publication Number Publication Date
EP1682713A1 true EP1682713A1 (fr) 2006-07-26
EP1682713B1 EP1682713B1 (fr) 2015-08-05

Family

ID=34429795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04805310.2A Active EP1682713B1 (fr) 2003-10-31 2004-10-26 Machine de production d'un non-tisse fini

Country Status (8)

Country Link
US (1) US20070212436A1 (fr)
EP (1) EP1682713B1 (fr)
JP (1) JP2007510071A (fr)
KR (1) KR20060090713A (fr)
CN (1) CN1875140A (fr)
BR (1) BRPI0416139B1 (fr)
FR (1) FR2861750B1 (fr)
WO (1) WO2005042821A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2935992B1 (fr) * 2008-09-16 2010-09-17 Rieter Perfojet Tour spunbond a dispositif electrostatique.

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Also Published As

Publication number Publication date
US20070212436A1 (en) 2007-09-13
FR2861750B1 (fr) 2006-02-24
KR20060090713A (ko) 2006-08-14
JP2007510071A (ja) 2007-04-19
EP1682713B1 (fr) 2015-08-05
BRPI0416139B1 (pt) 2015-03-17
FR2861750A1 (fr) 2005-05-06
CN1875140A (zh) 2006-12-06
WO2005042821A1 (fr) 2005-05-12
BRPI0416139A (pt) 2007-01-02

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