EP1900863A1 - Process and installation for manufacturing a textile comprising inner layers and device relating to the same - Google Patents
Process and installation for manufacturing a textile comprising inner layers and device relating to the same Download PDFInfo
- Publication number
- EP1900863A1 EP1900863A1 EP07291076A EP07291076A EP1900863A1 EP 1900863 A1 EP1900863 A1 EP 1900863A1 EP 07291076 A EP07291076 A EP 07291076A EP 07291076 A EP07291076 A EP 07291076A EP 1900863 A1 EP1900863 A1 EP 1900863A1
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- Prior art keywords
- webs
- web
- layers
- elementary
- elemental
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Classifications
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- 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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
- D01G15/02—Carding machines
- D01G15/12—Details
- D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G25/00—Lap-forming devices not integral with machines specified above
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- 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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
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- 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
Definitions
- the present invention relates to a method for manufacturing a textile having layers and interlays.
- the present invention also relates to a device for implementing this method.
- the present invention also relates to an installation for manufacturing a textile of the kind indicated at the beginning.
- Such textiles are of interest when it comes to combining physical properties that are impossible to combine in a textile of a single nature, or when it comes to the cooperation between them the properties of two textile nature different, or to cooperate or coexist textile layers with interlayers that may be of a non-textile nature, such as a film.
- the invention is particularly applicable to manufacture a textile in which layers of non-woven web such as a web from a card, and inter-layers formed of nanofibers or nanofilaments, whose diameter is typically between 50 nm and 1000 nm.
- the object of the invention is to manufacture a textile of the kind indicated at the beginning in an efficient and economical manner.
- the process for producing a textile having layers resulting from a fibrous web and intermediate layers is characterized in that a continuous sandwich is formed with an intermediate strip between two elementary nonwoven webs, and the web is the sandwich in a spreader-lapper.
- the interlayer is held between the two elemental webs during the layering.
- the topping is therefore carried out in a conventional manner, in principle without any particular precaution.
- the intermediate layers are separated from each other by two adjacent layers of elemental sail.
- the two elementary webs are manufactured in a card.
- Many cards provide two elementary sails that are common to gather in a single sail at the entrance to the crosslapper.
- the interlayer is placed between the two elementary veils before joining them and thus forming the sandwich of the invention.
- This elemental veil serves as a support for the interlayer which can therefore be intrinsically very fragile, and in particular do not have a mechanical strength that would allow it to be manipulated separately.
- the spacer strip may be formed by deposition of fibers against one side of one of the elementary webs, in particular electrostatically.
- the device for implementing the method according to the first aspect is characterized in that it comprises for the formation of a spacer strip a production apparatus intended to be mounted downstream of a card and between spaced guiding paths for two elementary webs produced simultaneously by this card.
- the installation for manufacturing a textile having layers derived from a fibrous web and intermediate layers comprises a card producing two elementary webs, means for guiding the two elementary webs along two pathways. first spaced, then joined, and a production apparatus according to the second aspect, placed between the two spaced paths.
- the installation shown very schematically in Figure 1 comprises a card 3 equipped with a carding drum 31 cooperating with two cylindrical combers 11, 21, each associated with a respective detacher 12, 22 also cylindrical.
- the drum 31 is rotated about its axis 32 in the direction of the arrow F3.
- a peripheral lining of the drum 31 drives fibers which have been placed on this periphery and then oriented in essentially circumferential direction by means of known non-illustrated co-operating with the lining of the drum 31.
- the rotary combers 11, 21 are arranged substantially one above on the other side near the descending side of the periphery of the drum 31.
- Each dof 11, 21 collects on its own peripheral lining a certain thickness of fibers taken from the periphery of the drum 31.
- Each of the rotary detachers 12 and 22 detaches from the doffer associated 11, 21, the collected fibers at the periphery of this doffer and deposited in the form of an elementary web 13, 23 on the corresponding one of two superimposed conveyor belts 14, 24.
- Each elementary sail 13, 23 consists of individualized fibers not bonded together, and generally oriented substantially parallel to the longitudinal direction of the elementary web considered 13, 23.
- the veil is extremely sparse because it contains a large amount of 'air. It is in the form of a continuous strip flowing in the direction of the arrows F1 (elemental sail 13) or respectively F2 (elemental sail 23).
- the conveyor belt 24 associated with the lower elemental web 23 conducts the elemental web 23 to a zone 4 for grouping the elementary webs, where the continuous elementary webs are superimposed on one another.
- the conveyor belt 14 associated with the upper elemental web 13 constitutes the beginning of a guiding and transport device which conducts the elementary web 13 of its detacher 12 to the grouping zone 4, along a path located at a certain distance above the path followed by the elemental sail 23 on the conveyor belt 24.
- the aforementioned transport device further comprises the conveyor belt 14, a terminal conveyor belt 16 which leads the upper elemental web 13 to the grouping zone 4.
- the conveyor belt 16 like the conveyor belts 14 and 24, carries the veil elementary associated on its outer face in the region where it is turned upwards. The associated elemental web thus rests on the conveyor belt by gravity.
- the conveyor belts 14 and 24 have a horizontal carrier face to support the associated web 13, 23.
- the conveyor belt 16 has a horizontal carrying face 17 in line with that of the conveyor belt 14, then an oblique bearing face 18 along which the elemental sail 13 follows a downward slope to reach the grouping zone 4.
- the guide and transport device for the upper elemental web 13 further comprises an upper conveyor 7 comprising a porous conveyor belt 8, and a vacuum box 9 whose open side is adjacent to the inner face of the lower part of the porous conveyor belt 8. Said lower portion covers the end of the upper portion of the conveyor belt 14, the beginning of the horizontal portion 17 of the conveyor belt 16, as well as the entire space between the conveyor belts 14 and 16.
- the elemental web approaching the downstream end of the carrying part of the conveyor belt 14 is sucked against the lower part of the conveyor belt 8 by virtue of the suction prevailing in the casing 9 and the pores of the conveyor belt 8.
- the elemental web 13 continues to be guided along its path by being sucked against the outer and lower face of the conveyor belt 8.
- the elementary web 13 reaches the horizontal carrying part 17 of the conveyor belt 16, it is deposited on it by gravity when it leaves the area subjected to the suction produced by the box 9.
- the veil upper elementary element 13 continues its path resting on the horizontal parts 17 and inclined 18 of the conveyor belt 16. Leaving the conveyor belt 16 and more particularly the inclined bearing portion 18, the upper elemental web 13 is deposited on the lower elementary web 23 in the grouping area 4.
- the device according to the invention further comprises an apparatus 41 for the formation of an intermediate layer 42 or interlayer between the two elementary webs 13 and 23.
- the apparatus 41 is housed in the space 6 formed between the two webs 13, 23, downstream of the card 3 and upstream of the grouping zone 4.
- the intermediate layer has the same width as each of the elementary webs 13, 23.
- the intermediate layer is formed by a deposit against one of the elementary webs, on its side facing the other elemental sail.
- the deposit is formed over the entire width of the elemental veil. Even more particularly, in this example, the deposit is formed against the lower face of the upper elemental web 13 in the zone where it is supported by suction against the lower part of the upper conveyor belt 8.
- the apparatus 41 is an apparatus for the electrostatic deposition of nanofibers intended to form against the lower face of the upper elemental veil 13 a sort of nonwoven mat of nanofibers and / or nanofilaments.
- a solution polymer is sprayed from a reserve, while establishing between the projection means and the receiving surface, that is to say the lower surface of the upper elemental sail 13 , a potential difference of, for example, 10,000 V.
- the liquid jet or jets break up into very fine filaments much like a multiple electric arc in the air. These very fine filaments constitute the nanofibers or nanofilaments making up the interlayer to be produced.
- FIG. 2A represents an elementary web 13 or 23 in the zone A1 or A2 respectively, just after the detachers 12, 22.
- the upper elemental web 13 (FIG. 2B) has on its underside the intermediate layer 42 while the lower elementary web 23 is unchanged.
- the sandwich web 47 formed by the grouping (FIG. 2C) comprises the intermediate layer 42 forming a continuous band between the two elementary webs 13, 23.
- the two elementary webs 13, 23 and the intermediate layer or strip 42 have the same width and are exactly superimposed in the sandwich 47.
- the grouping zone 4 substantially coincides with the entry into a crosslapper 43 (FIG. 3). It will be understood that Figure 3 should be viewed as the extension of Figure 1 on the right side thereof.
- the crosslapper 43 is conventional in itself. It can be of any known type. The one represented corresponds substantially to EP 0 517 563 B2 . It comprises a front carpet 44 and a rear carpet 46. The web to be covered, hence here the sandwich web 47 of FIG. 2C, is deposited on the front carpet 44 which circulates along the arrow F4 and leads the web 47 to the roof. entry 48 of a nip 49 along which the web 47 is held between the two mats 44, 46.
- the belt 46 flows in the direction indicated by the arrow F6 so that the speeds of the two mats are equal and same direction along the nip 49.
- the nip 49 results in a lapping slot 51 formed between the two mats 44, 46 and carried by a lapping carriage 52 which moves back and forth according to the double arrow F7 above an output conveyor 53.
- the upper bearing surface 54 of the conveyor 53 moves along the arrow F8 transversely to the longitudinal direction of the elementary webs 13 to 23.
- the movement F7 back and forth of the lapper carriage is longitudinal ort to the elementary webs 13, 23 seen from above, and parallel to the width of the carrier surface 54 of the conveyor 53. Thanks to the movement of the carriage 52, the sandwich web 47 is deposited on the upper bearing surface 54 of the conveyor 53 in successive segments. , essentially transverse, interconnected by folds 55 which form the longitudinal edges of the web.
- the segments are typically more numerous than those shown in FIG. 3 in order to simplify the latter.
- the segments instead of being strictly transversal on the output conveyor 53, are in zig-zag and have oblique edges. 56 ( Figure 4).
- the crosslapper 43 further comprises an accumulator carriage 57 ( Figure 3) which moves back and forth along the arrow F9 parallel to the reciprocating direction F7.
- the purpose of moving the accumulator carriage 57 is to keep the length of the path of the sandwich web 47 constant or substantially constant between the entry in the crosslapper 43 and the deposition slot 51.
- Each belt 44, 46 makes a turn to 180 ° on a respective auxiliary carriage 58, 59 which moves back and forth parallel to the lapper carriages 52 and accumulator 57 so that the developed length of the path followed by each of the front mats 44 and rear 46 is constant.
- the resulting textile has the structure shown in section in FIG. 5, corresponding to a stack of sandwich webs 47 which have been turned once in one direction. (sail 13 on the top) and once in the other (veil 23 on the top) by the topping operation. There are therefore pairs of elementary sails 13, 13 or 23, 23. These pairs are separated from each other by the intermediate layers 42.
- the product obtained at the exit of the lapping spreader may then undergo any appropriate subsequent treatment, for example a heat treatment and / or chemical and / or physicochemical for its mechanical stabilization and / or to confer one or more particular properties.
- the invention is not limited to the example described and shown. It could also be formed in a space such as 6 between the two elementary webs an intermediate layer having a certain mechanical strength and which would come to join one and / or the other of the two elemental sails at a later stage of training of this interlayer.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
La présente invention concerne un procédé pour fabriquer un textile présentant des couches et des intercouches.The present invention relates to a method for manufacturing a textile having layers and interlays.
La présente invention concerne également un dispositif pour la mise en oeuvre de ce procédé.The present invention also relates to a device for implementing this method.
La présente invention concerne encore une installation pour fabriquer un textile du genre indiqué au début.The present invention also relates to an installation for manufacturing a textile of the kind indicated at the beginning.
De tels textiles présentent un intérêt lorsqu'il s'agit de réunir des propriétés physiques qui sont impossibles à réunir dans un textile présentant une seule nature, ou encore lorsqu'il s'agit de faire coopérer entre elles les propriétés de deux textiles de nature différente, ou encore pour faire coopérer ou coexister des couches textiles avec des intercouches qui peuvent être d'une nature non-textile, comme par exemple un film.Such textiles are of interest when it comes to combining physical properties that are impossible to combine in a textile of a single nature, or when it comes to the cooperation between them the properties of two textile nature different, or to cooperate or coexist textile layers with interlayers that may be of a non-textile nature, such as a film.
L'invention est notamment applicable pour fabriquer un textile dans lequel alternent des couches de voile non-tissé tel qu'un voile issu d'une carde, et des intercouches formées de nanofibres ou nanofilaments, dont le diamètre est typiquement compris entre 50 nm et 1000 nm.The invention is particularly applicable to manufacture a textile in which layers of non-woven web such as a web from a card, and inter-layers formed of nanofibers or nanofilaments, whose diameter is typically between 50 nm and 1000 nm.
Le but de l'invention est de fabriquer un textile du genre indiqué au début de manière efficace et économique.The object of the invention is to manufacture a textile of the kind indicated at the beginning in an efficient and economical manner.
Suivant l'invention, le procédé pour fabriquer un textile présentant des couches issues d'un voile fibreux et des couches intercalaires est caractérisé en ce qu'on forme un sandwich continu avec une bande intercalaire entre deux voiles non-tissés élémentaires, et on nappe le sandwich dans un étaleur-nappeur.According to the invention, the process for producing a textile having layers resulting from a fibrous web and intermediate layers is characterized in that a continuous sandwich is formed with an intermediate strip between two elementary nonwoven webs, and the web is the sandwich in a spreader-lapper.
La couche intercalaire est tenue entre les deux voiles élémentaires pendant le nappage. Le nappage s'effectue donc de manière classique, en principe sans précaution particulière. Dans le produit obtenu, les couches intercalaires sont séparées entre elles par deux couches adjacentes de voile élémentaire.The interlayer is held between the two elemental webs during the layering. The topping is therefore carried out in a conventional manner, in principle without any particular precaution. In the product obtained, the intermediate layers are separated from each other by two adjacent layers of elemental sail.
De préférence, on fabrique les deux voiles élémentaires dans une carde. De nombreuses cardes fournissent deux voiles élémentaires qu'il est usuel de réunir en un voile unique à l'entrée dans l'étaleur-nappeur. Dans cette version de l'invention, on place la couche intercalaire entre les deux voiles élémentaires avant de réunir ceux-ci et de former ainsi le sandwich de l'invention.Preferably, the two elementary webs are manufactured in a card. Many cards provide two elementary sails that are common to gather in a single sail at the entrance to the crosslapper. In this version of the invention, the interlayer is placed between the two elementary veils before joining them and thus forming the sandwich of the invention.
Dans certaines applications, il est avantageux de former la bande intercalaire contre une face de l'un des voiles élémentaires. Ce voile élémentaire sert alors de support pour la couche intercalaire qui peut donc être intrinsèquement très fragile, et en particulier ne pas posséder une tenue mécanique qui lui permettrait d'être manipulée séparément.In some applications, it is advantageous to form the spacer strip against a face of one of the elementary webs. This elemental veil then serves as a support for the interlayer which can therefore be intrinsically very fragile, and in particular do not have a mechanical strength that would allow it to be manipulated separately.
En particulier, la bande intercalaire peut être formée par dépôt de fibres contre une face de l'un des voiles élémentaires, en particulier par voie électrostatique.In particular, the spacer strip may be formed by deposition of fibers against one side of one of the elementary webs, in particular electrostatically.
Il est.plus particulièrement envisagé de déposer contre ladite face du voile élémentaire des nanofibres ou nanofilaments par le procédé electrostatique dit « électrospinning ».It is more particularly contemplated to deposit nanofibers or nanofilaments against said surface of the elemental film by the electrostatic process known as "electrospinning".
Suivant un second aspect de l'invention, le dispositif pour la mise en oeuvre du procédé selon le premier aspect est caractérisé en ce qu'il comprend pour la formation d'une bande intercalaire un appareil de production destiné à être monté en aval d'une carde et entre des trajets de guidage espacés pour deux voiles élémentaires produits simultanément par cette carde.According to a second aspect of the invention, the device for implementing the method according to the first aspect is characterized in that it comprises for the formation of a spacer strip a production apparatus intended to be mounted downstream of a card and between spaced guiding paths for two elementary webs produced simultaneously by this card.
Suivant un troisième aspect de l'invention, l'installation pour fabriquer un textile présentant des couches issues d'un voile fibreux et des couches intercalaires, comprend une carde produisant deux voiles élémentaires, des moyens pour guider les deux voiles élémentaires selon deux trajets d'abord espacés, puis réunis, et un appareil de production selon le second aspect, placé entre les deux trajets espacés.According to a third aspect of the invention, the installation for manufacturing a textile having layers derived from a fibrous web and intermediate layers, comprises a card producing two elementary webs, means for guiding the two elementary webs along two pathways. first spaced, then joined, and a production apparatus according to the second aspect, placed between the two spaced paths.
D'autres particularités et avantages de l'invention ressortiront encore de la description ci-après, relative à un exemple non-limitatif.Other features and advantages of the invention will emerge from the description below, relating to a non-limiting example.
Aux dessins annexés :
- la figure 1 est une vue schématique longitudinale d'une première partie de l'installation selon l'invention ;
- la figure 2A est une vue longitudinale partielle d'un voile élémentaire dans la région A1 ou A2 de la figure 1 ;
- la figure 2B est une vue longitudinale partielle des voiles élémentaires dans la zone B de la figure 1 ;
- la figure 2C est une vue longitudinale partielle du sandwich dans la zone C de la figure 1 ;
- la figure 3 est une vue de l'étaleur-nappeur constituant la deuxième partie de l'installation, dans le prolongement du côté droit de la figure 1 ;
- la figure 4 est une vue de dessus de l'installation ; et
- la figure 5 est une vue partielle du textile obtenu, en coupe suivant V-V de la figure 4.
- Figure 1 is a schematic longitudinal view of a first part of the installation according to the invention;
- Figure 2A is a partial longitudinal view of an elemental web in the region A1 or A2 of Figure 1;
- Figure 2B is a partial longitudinal view of the elementary webs in zone B of Figure 1;
- Figure 2C is a partial longitudinal view of the sandwich in area C of Figure 1;
- Figure 3 is a view of the spreader-lapper constituting the second part of the installation, in the extension of the right side of Figure 1;
- Figure 4 is a top view of the installation; and
- FIG. 5 is a partial view of the textile obtained, in section along VV of FIG. 4.
L'installation représentée très schématiquement à la figure 1 comprend une carde 3 équipée d'un tambour de carde 31 coopérant avec deux peigneurs cylindriques 11, 21, associés chacun à un détacheur respectif 12, 22 également cylindrique. Le tambour 31 est entraîné en rotation autour de son axe 32 dans le sens de la flèche F3. Une garniture périphérique du tambour 31 entraîne des fibres qui ont été placées sur cette périphérie puis orientées en sens essentiellement circonférentiel par des moyens connus non représentés coopérant avec la garniture du tambour 31. Les peigneurs rotatifs 11, 21 sont disposés sensiblement l'un au dessus de l'autre à proximité du côté descendant de la périphérie du tambour 31. Chaque peigneur 11, 21 recueille sur sa propre garniture périphérique une certaine épaisseur de fibres prélevées sur la périphérie du tambour 31. Chacun des détacheurs rotatifs 12 et 22 détache du peigneur associé 11, 21, les fibres collectées à la périphérie de ce peigneur et les dépose sous forme d'un voile élémentaire 13, 23 sur l'un correspondant de deux tapis transporteurs superposés 14, 24.The installation shown very schematically in Figure 1 comprises a
Chaque voile élémentaire 13, 23 est constitué de fibres individualisées non liées entre elles, et orientées d'une manière générale sensiblement parallèlement à la direction longitudinale du voile élémentaire considéré 13, 23. Le voile est extrêmement peu dense car il renferme une grande quantité d'air. Il se présente sous la forme d'une bande continue circulant dans le sens des flèches F1 (voile élémentaire 13) ou respectivement F2 (voile élémentaire 23).Each
Le tapis transporteur 24 associé au voile élémentaire inférieur 23 conduit le voile élémentaire 23 jusqu'à une zone 4 de regroupement des voiles élémentaires, où les voiles élémentaires continus sont superposés l'un sur l'autre.The
La carde telle que décrite jusqu'à présent est classique, c'est pourquoi on n'en donne qu'une description sommaire.The card as described so far is traditional, so it gives only a summary description.
Le tapis transporteur 14 associé au voile élémentaire supérieur 13 constitue le début d'un dispositif de guidage et de transport qui conduit le voile élémentaire 13 de son détacheur 12 jusqu'à la zone de regroupement 4, le long d'un trajet situé à une certaine distance au-dessus du trajet suivi par le.voile élémentaire 23 sur le tapis transporteur 24.The
Il y a ainsi au-dessus du voile élémentaire inférieur 23 et en-dessous du voile élémentaire supérieur 13 un espace libre 6.There is thus above the lower
Le dispositif de transport précité comprend en plus du tapis transporteur 14, un tapis transporteur terminal 16 qui conduit le voile élémentaire supérieur 13 jusqu'à la zone de regroupement 4. Le tapis transporteur 16, comme les tapis transporteurs 14 et 24, porte le voile élémentaire associé sur sa face extérieure dans la région ou elle est tournée vers le haut. Le voile élémentaire associé repose ainsi sur le tapis transporteur par gravité. Les tapis transporteurs 14 et 24 ont une face porteuse horizontale pour supporter le voile associé 13, 23. Le tapis transporteur 16 a une face porteuse horizontale 17 dans le prolongement de celle du tapis transporteur 14, puis une face porteuse oblique 18 le long de laquelle le voile élémentaire 13 suit un trajet en pente descendante pour atteindre la zone de regroupement 4.The aforementioned transport device further comprises the
Le dispositif de guidage et de transport pour le voile élémentaire supérieur 13 comprend en outre un convoyeur supérieur 7 comprenant un tapis transporteur poreux 8, ainsi qu'un caisson à dépression 9 dont le côté ouvert est adjacent à la face intérieure de la partie inférieure du tapis transporteur poreux 8. Ladite partie inférieure recouvre la fin de la partie supérieure du tapis transporteur 14, le début de la partie horizontale 17 du tapis transporteur 16, ainsi que la totalité de l'espace entre les tapis transporteurs 14 et 16.The guide and transport device for the upper
En fonctionnement, le voile élémentaire approchant de l'extrémité aval de la partie porteuse du tapis transporteur 14 est aspiré contre la partie inférieure du tapis transporteur 8 grâce à l'aspiration régnant dans le caisson 9 et aux pores du tapis transporteur 8. Ainsi, le voile élémentaire 13 continue d'être guidé le long de son trajet en étant plaqué par aspiration contre la face extérieure et inférieure du tapis transporteur 8. Lorsque le voile élémentaire 13 atteint la partie porteuse horizontale 17 du tapis transporteur 16, il se dépose sur celle-ci par gravité lorsqu'il quitte la zone soumise à l'aspiration produite par le caisson 9. A la suite de cela, le voile élémentaire supérieur 13 continue son trajet en reposant sur les parties horizontale 17 et inclinée 18 du tapis transporteur 16. En quittant le tapis transporteur 16 et plus particulièrement la partie porteuse inclinée 18, le voile élémentaire supérieur 13 vient se déposer sur le voile élémentaire inférieur 23 dans la zone de regroupement 4.In operation, the elemental web approaching the downstream end of the carrying part of the
Le dispositif selon l'invention comprend en outre un appareil 41 pour la formation d'une couche intercalaire 42 ou intercouche entre les deux voiles élémentaires 13 et 23. L'appareil 41 est logé dans l'espace 6 ménagé entre les deux voiles 13, 23, en aval de la carde 3 et en amont de la zone de regroupement 4. La couche intercalaire a la même largeur que chacun des voiles élémentaires 13, 23.The device according to the invention further comprises an
Dans l'exemple représenté, la couche intercalaire est formée par un dépôt contre l'un des voiles élémentaires, sur sa face tournée vers l'autre voile élémentaire. Le dépôt est formé sur toute la largeur du voile élémentaire. Encore plus particulièrement, dans cet exemple, le dépôt est formé contre la face inférieure du voile élémentaire supérieur 13 dans la zone où il est soutenu par aspiration contre la partie inférieure du tapis transporteur supérieur 8.In the example shown, the intermediate layer is formed by a deposit against one of the elementary webs, on its side facing the other elemental sail. The deposit is formed over the entire width of the elemental veil. Even more particularly, in this example, the deposit is formed against the lower face of the upper
Dans l'exemple encore plus précis qui est représenté à la figure 1, l'appareil 41 est un appareil de dépôt électrostatique de nanofibres destinées à former contre la face inférieure du voile élémentaire supérieur 13 une sorte de mat non-tissé de nanofibres et/ou de nanofilaments. Pour cela, de manière connue en soi, on projette un polymère en solution à partir d'une réserve, tout en établissant entre les moyens de projection et la surface réceptrice, c'est-à-dire la surface inférieure du voile élémentaire supérieur 13, une différence de potentiel de, par exemple, 10 000 V. Sous l'effet de cette différence de potentiel, le ou les jets liquides se fragmentent en filaments très fins un peu comme le ferait un arc électrique multiple dans l'air. Ces filaments très fins constituent les nanofibres ou nanofilaments composant la couche intercalaire à réaliser.In the even more specific example shown in FIG. 1, the
La figure 2A représente un voile élémentaire 13 ou 23 dans la zone A1 ou respectivement A2, juste après les détacheurs 12, 22.FIG. 2A represents an
Dans la zone B située en aval de l'action de l'appareil 41, le voile élémentaire supérieur 13 (figure 2B) comporte sur sa face inférieure la couche intercalaire 42 tandis que le voile élémentaire inférieur 23 est inchangé. Dans la zone C correspondant à la zone de regroupement 4, le voile sandwich 47 formé par le regroupement (figure 2C) comporte la couche intercalaire 42 formant une bande continue entre les deux voiles élémentaires 13, 23. Les deux voiles élémentaires 13, 23 et la couche ou bande intercalaire 42 ont la même largeur et sont exactement superposées dans le sandwich 47.In the zone B situated downstream from the action of the
La zone de regroupement 4 coïncide sensiblement avec l'entrée dans un étaleur-nappeur 43 (figure 3). On comprendra que la figure 3 doit être regardée comme le prolongement de la figure 1 du côté droit de celle-ci. L'étaleur-nappeur 43 est classique en lui-même. Il peut être de n'importe quel type connu. Celui représenté correspond sensiblement au
Les segments sont en pratique typiquement plus nombreux que représenté à la Figure 3 dans un but de simplification de cette dernière. Comme le montre la figure 4, grâce au mouvement d'avance du convoyeur de sortie 53 selon la flèche F8, les segments, au lieu d'être strictement transversaux sur le convoyeur de sortie 53, sont en zig-zag et présentent des bords obliques 56 (figure 4).In practice, the segments are typically more numerous than those shown in FIG. 3 in order to simplify the latter. As shown in FIG. 4, thanks to the forward movement of the
L'étaleur-nappeur 43 comprend en outre un chariot accumulateur 57 (figure 3) qui effectue des va-et-vient selon la flèche F9 parallèle à la direction de va-et-vient F7. Le déplacement du chariot accumulateur 57 a pour but de maintenir constante ou sensiblement constante la longueur du trajet du voile sandwich 47 entre l'entrée dans l'étaleur-nappeur 43 et la fente de dépôt 51. Chaque tapis 44, 46 effectue un virage à 180° sur un chariot auxiliaire respectif 58, 59 qui se déplace en va-et-vient parallèle aux chariots nappeur 52 et accumulateur 57 de façon que la longueur développée du trajet suivi par chacun des tapis avant 44 et arrière 46 soit constante.The
A la sortie de l'étaleur-nappeur 43, donc sur le convoyeur de sortie 53, le textile obtenu présente la structure représentée en coupe à la figure 5, correspondant à un empilement de voiles sandwich 47 qui ont été tournés une fois dans un sens (voile 13 sur le dessus) et une fois dans l'autre (voile 23 sur le dessus) par l'opération de nappage. Il y a donc des paires de voiles élémentaires 13, 13 ou 23, 23. Ces paires sont séparées les unes des autres par les couches intercalaires 42.At the exit of the
Le produit obtenu à la sortie de l'étaleur nappeur peut ensuite subir tout traitement ultérieur approprié, par exemple un traitement thermique et/ou chimique et/ou physico-chimique pour sa stabilisation mécanique et/ou pour lui conférer une ou plusieurs propriétés particulières.The product obtained at the exit of the lapping spreader may then undergo any appropriate subsequent treatment, for example a heat treatment and / or chemical and / or physicochemical for its mechanical stabilization and / or to confer one or more particular properties.
Bien entendu, l'invention n'est pas limitée à l'exemple décrit et représenté. On pourrait également former dans un espace tel que 6 entre les deux voiles élémentaires une couche intercalaire ayant une certaine tenue mécanique et qui ne viendrait rejoindre l'un et/ou l'autre des deux voiles élémentaires qu'à un stade postérieur à la formation de cette bande intercalaire.Of course, the invention is not limited to the example described and shown. It could also be formed in a space such as 6 between the two elementary webs an intermediate layer having a certain mechanical strength and which would come to join one and / or the other of the two elemental sails at a later stage of training of this interlayer.
Il serait possible de réaliser des voiles élémentaires différents pour réaliser dans le produit des couches de voile ayant alternativement les propriétés de l'un des voiles élémentaires et de l'autre voile élémentaire, ces couches étant séparées par les couches intercalaires.It would be possible to produce different elemental webs to produce in the product layers of sail having alternately the properties of one of the elementary webs and the other elemental sail, these layers being separated by the intermediate layers.
Claims (11)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR0608115A FR2905956A1 (en) | 2006-09-15 | 2006-09-15 | METHOD AND INSTALLATION FOR MANUFACTURING TEXTILE COMPRISING INTERLAYERS, AND DEVICE THEREFOR. |
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EP1900863A1 true EP1900863A1 (en) | 2008-03-19 |
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EP07291076A Withdrawn EP1900863A1 (en) | 2006-09-15 | 2007-09-07 | Process and installation for manufacturing a textile comprising inner layers and device relating to the same |
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FR (1) | FR2905956A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008083637A1 (en) * | 2007-01-11 | 2008-07-17 | Elmarco, S.R.O. | Production method of layered sound absorptive non-woven fabric |
CN101838887A (en) * | 2010-05-14 | 2010-09-22 | 东华大学 | Device and method for forming light flexible thermal spacing material |
CN101892599A (en) * | 2010-05-14 | 2010-11-24 | 东华大学 | Molding device and method for fixing down flocculus through warp knitted net |
WO2012049457A1 (en) | 2010-10-13 | 2012-04-19 | Eco Technilin Sas | Fibre mats |
WO2012059273A1 (en) * | 2010-11-02 | 2012-05-10 | Trützschler Nonwovens Gmbh | Nonwoven web laying device and method for forming a nonwoven fabric |
WO2013144748A1 (en) * | 2012-03-28 | 2013-10-03 | Lakshmi Machine Works Limited | Web drafting assembly of carding machine |
WO2020025640A1 (en) * | 2018-07-30 | 2020-02-06 | Swm Luxembourg Sarl | Apparatus and method for making fibrous webs having isotropic structure |
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CH239576A (en) | 1944-07-20 | 1945-10-31 | Europaeische Holding Intercito | Electrical direct current welding device. |
FR2770855A1 (en) | 1997-11-07 | 1999-05-14 | Asselin | METHOD AND DEVICE FOR PRODUCING A TEXTILE TABLECLOTH |
WO2006108363A2 (en) | 2005-04-11 | 2006-10-19 | Elmarco, S.R.O | Layered sound absorptive non-woven fabric |
-
2006
- 2006-09-15 FR FR0608115A patent/FR2905956A1/en not_active Withdrawn
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2007
- 2007-09-07 EP EP07291076A patent/EP1900863A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CH239576A (en) | 1944-07-20 | 1945-10-31 | Europaeische Holding Intercito | Electrical direct current welding device. |
FR2770855A1 (en) | 1997-11-07 | 1999-05-14 | Asselin | METHOD AND DEVICE FOR PRODUCING A TEXTILE TABLECLOTH |
WO2006108363A2 (en) | 2005-04-11 | 2006-10-19 | Elmarco, S.R.O | Layered sound absorptive non-woven fabric |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008083637A1 (en) * | 2007-01-11 | 2008-07-17 | Elmarco, S.R.O. | Production method of layered sound absorptive non-woven fabric |
CN101838887A (en) * | 2010-05-14 | 2010-09-22 | 东华大学 | Device and method for forming light flexible thermal spacing material |
CN101892599A (en) * | 2010-05-14 | 2010-11-24 | 东华大学 | Molding device and method for fixing down flocculus through warp knitted net |
CN101838887B (en) * | 2010-05-14 | 2011-11-23 | 东华大学 | Device and method for forming light flexible thermal spacing material |
WO2012049457A1 (en) | 2010-10-13 | 2012-04-19 | Eco Technilin Sas | Fibre mats |
WO2012059273A1 (en) * | 2010-11-02 | 2012-05-10 | Trützschler Nonwovens Gmbh | Nonwoven web laying device and method for forming a nonwoven fabric |
CN103221592A (en) * | 2010-11-02 | 2013-07-24 | 特吕茨勒非织造布有限公司 | Nonwoven web laying device and method for forming a nonwoven fabric |
WO2013144748A1 (en) * | 2012-03-28 | 2013-10-03 | Lakshmi Machine Works Limited | Web drafting assembly of carding machine |
WO2020025640A1 (en) * | 2018-07-30 | 2020-02-06 | Swm Luxembourg Sarl | Apparatus and method for making fibrous webs having isotropic structure |
US11585018B2 (en) | 2018-07-30 | 2023-02-21 | Delstar Technologies, Inc. | Fibrous webs having isotropic structure and apparatus and method for making same |
Also Published As
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FR2905956A1 (en) | 2008-03-21 |
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