EP2126165B1 - Procédé et appareil pour étirer et déposer une pluralité de fibres pour former un non-tissé - Google Patents

Procédé et appareil pour étirer et déposer une pluralité de fibres pour former un non-tissé Download PDF

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Publication number
EP2126165B1
EP2126165B1 EP08707966A EP08707966A EP2126165B1 EP 2126165 B1 EP2126165 B1 EP 2126165B1 EP 08707966 A EP08707966 A EP 08707966A EP 08707966 A EP08707966 A EP 08707966A EP 2126165 B1 EP2126165 B1 EP 2126165B1
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EP
European Patent Office
Prior art keywords
suction
stream
guidance
channel
drawing unit
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.)
Not-in-force
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EP08707966A
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German (de)
English (en)
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EP2126165A1 (fr
Inventor
Henning Rave
Wiley Scott Harris
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Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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Publication of EP2126165A1 publication Critical patent/EP2126165A1/fr
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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
    • 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
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D7/00—Collecting the newly-spun products
    • 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
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • 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

Definitions

  • the invention relates to a method for drawing and depositing a plurality of fibers to form a non-woven according to the preamble of claim 1 and an apparatus for implementing the method according to the preamble of claim 8.
  • a plurality of extruded filament strands have to be deposited as evenly as possible to form a textile fabric.
  • the filament strands are drawn off using a feed fluid more or less after the extrusion and cool-down processes and are guided to a deposit belt.
  • those methods and apparatuses have proved to be particularly useful in which a drawing unit blows the filament strands into an open system.
  • a method of this type and an apparatus of this type are disclosed by way of example in US 6,183,684 .
  • a drawing unit is used in order to draw off, stretch and deposit the synthetic fibers after their extrusion out of a spinning device.
  • the drawing unit comprises a conveying channel, which has a slot-shaped fiber inlet on its upper side. Shortly below the fiber inlet, several fluid inlets open out into the conveying channel, through which fluid inlets a feed fluid, preferably air having the effect of excess pressure is supplied to the conveying channel.
  • a feed fluid preferably air having the effect of excess pressure is supplied to the conveying channel.
  • the fiber strands are thus drawn into the conveying channel of the drawing unit and accelerated within the guidance channel and blown out in the form of a blowing stream through the fiber outlet of the conveying channel.
  • the fiber strands are stretched and received immediately thereafter by a deposit belt for being deposited thereon.
  • the fibers together with the feed fluid hit the deposit belt in the form of a blowing stream. Due to the open system, the blowing stream, after emerging from the drawing unit, interacts immediately with the incoming ambience.
  • Suction is thus generated particularly on the lower side of the drawing unit due to the blowing out of the fluid and the fibers. This suction leads directly to the suctioning of ambient air.
  • the suction stream generated combines with the blowing stream and is guided together with the blowing stream along the guidance distance up to the deposit belt.
  • WO 2005/093138 A1 A further method and device for melt spinning fine synthetic fibers to produce a nonwoven material are known from WO 2005/093138 A1 .
  • WO 2005/093138 A1 teaches to extruded a polymer melt through bores of a spinneret to form a fiber strand.
  • the freshly extruded fiber strand is guided together with a gaseous stream through a system of nozzles, such that the fiber strand is split on the outlet side of the nozzle system into several fine fibres.
  • the fibers are deposited to form a nonwoven material.
  • the fibers are guided through an ejector which generates a suction stream.
  • Document DE 103 22 460 A1 discloses a method and an apparatus for producing a spunbonded fabric of a thermoplastic material, wherein the filaments resulting from broken fibers are additionally tempered and/or drawn and have different diameters and different fiber lengths.
  • the filaments are guided through a channel before they reach a conveyor. Within the channel the filaments are accelerated by a suction stream which is generated by a vacuum source.
  • the object of the invention to provide a method and an apparatus of the generic kind for drawing and depositing a plurality of fibers to form a non-woven in which method or apparatus, the fibers can be guided in a controlled manner through an open space by means of a blowing stream and deposited to form a non-woven.
  • the advantage of the invention is that the fibers can be guided up to their deposition substantially without being influenced by the immediate ambience.
  • the suction effect occurring on the outlet side of the drawing unit is used for generating a suction stream, which is generated out of ambient air outside of an ambience influencing the deposition of the fibers, wherein the suction stream is supplied to the blowing stream in the form of two partial suction streams that are sucked in uniformly on both the longitudinal sides of the blowing stream, wherein the partial suction streams are each supplied by means of a lateral suction channel, the ambient air of the partial suction streams being sucked in by means of suction openings of the suction channels and wherein the suction openings of the suction channels are assigned to the ambience laterally next to the drawing unit and turned away from the deposit belt.
  • the apparatus of the invention comprises at least one conducting means, through which the suction stream generated out of ambient air is supplied from outside of an ambience influencing the deposition of the fibers.
  • the conducting means it is possible to use ambiences that are at a large distance from the deposit belt in order to provide the ambient air required for the suction stream.
  • the suction stream can be generated preferably on both the longitudinal sides of the blowing stream uniformly so that the suctioned partial suction streams accompany the blowing stream symmetrically and can be used jointly for guiding the fibers.
  • conducting means are each arranged below the drawing unit on both longitudinal sides of the blowing stream, the conveying means being designed identically for generating equal partial suction streams. It is thus possible to guide every fiber strand within a plurality of fibers with substantially equal conditions through the guidance distance.
  • the improvement of the invention is particularly advantageous in order to provide ambient air as far as possible out of the nearest ambience for forming the partial suction streams.
  • the partial suction streams are each supplied by means of a lateral suction channel, which has suction openings. It is thus possible to form suction openings facing in any directions by means of the shape of the suction channels.
  • the suction openings of the suction channels are assigned to the ambience laterally next to the drawing unit and thus turned away from the deposit belt.
  • the blowing stream is shielded from the ambience in at least one depositing area and is absorbed by an exhaust equipment disposed below the deposit belt.
  • the blowing stream generated by drawing unit is blown out of the open space into an open guidance channel formed by the guidance means in order to be guided within the guidance channel towards the deposit belt.
  • the guidance means form a spatially limited region above the deposit belt, in which region the fibers are laid to form a non-woven.
  • Such an arrangement has proved to be particularly useful in order to achieve a non-woven having uniform strength both in the machine direction and in the cross direction. Due to the relatively high mobility of the fibers within the open space above the guidance means, appropriately large deposit ellipses are generated in the fiber strands, which are restricted in the machine direction just before their deposition on the deposit belt. Thus it is possible to deposit the fibers on the surface of the deposit table so as to achieve the optimum strength and thickness of the non-woven web.
  • the distance between the outlet of the drawing unit and the opening of the guidance channel is preferably larger than half the guidance distance so as to provide the fibers with sufficiently high mobility before they enter into the guidance channel.
  • the guidance distance between the blast opening of the drawing unit and the deposit belt can be adjusted to very short distances.
  • the distance between the drawing unit and the deposit belt is preferably formed with a length lying in a range of 100 mm to 700 mm.
  • the open space on the supply side of the belt and on the discharge side of the belt is shielded from the ambience by means of walls.
  • the width of the open space formed by the walls is adjusted in a range of 300 and 1,000 mm.
  • the inventive method and the apparatus of the invention are distinguished by a stable and reproducible deposition of the fibers to form a non-woven web with high uniformity and particularly light basis weight, where both high spinning and production speeds are possible even in the case of the shortest guidance distances in the open system.
  • the invention is used preferably for producing so-called spunbond non-wovens. In principle, however, it is also possible to use the invention for so-called melt-blown non-wovens.
  • Fig. 1 and 2 schematically show a first exemplary embodiment of the inventive apparatus for depositing synthetic fiber strands to form a non-woven and for implementing the method of the invention.
  • Fig. 1 shows a side view of the exemplary embodiment while Fig. 2 schematically shows a cross-sectional view thereof.
  • the following description applies to both the figures unless express reference is made to any one of the figures.
  • FIG. 1 and 2 shows a parallelepiped drawing unit 1, which is usually disposed below a spinning device.
  • Drawing units of this type are known in general and have been explained in detail in the United States Patent Specification US 6,183,684 B1 by way of example.
  • the aforementioned publication may be referred to in this respect; only the essential parts have been included in the following.
  • the drawing unit 1 comprises a middle conveying channel 5, which is delimited on an upper side of the drawing unit 1 by a slot-shaped fiber inlet 2 and on the lower side of the drawing unit 1 by a blast opening 3.
  • the conveying channel 5 is provided with a slot-shaped design and it extends substantially over the entire length of the parallelepiped drawing unit 1.
  • a feed fluid-preferably compressed air- is supplied from a fluid source (not shown) by means of the fluid connection 4, so as to create excess pressure in the conveying channel 5 in relation to the ambience.
  • the drawing unit 1 is arranged at a distance above a deposit belt 6.
  • the width of the deposit belt 6 extends over the entire length of the drawing unit 1.
  • the deposit belt 6 is preferably guided in the form of an endless belt over several conveyor rollers 28, one of which is shown in Fig. 2 , and is driven such that it is directed transversely to the longitudinal side of the drawing unit 1.
  • the deposit belt 6 thus moves continuously in a guidance direction, which is indicated in Fig. 1 and Fig. 2 using arrows.
  • the deposit belt 6 is designed to be permeable to air, an exhaust equipment 22 being disposed on the lower side of the deposit belt 6 in a deposit region formed vertically below the drawing unit 1.
  • the region between the drawing unit 1 and the deposit belt 6 is used for guiding the fiber strands 20 emerging out of the blast opening 3 in the form of a blowing stream.
  • the distance between the blast opening 3 on the lower side of the drawing unit 1 and the surface of the deposit belt 6 is referred to as the guidance distance here.
  • an open space 18 which has a large guidance width with the result that the blowing stream with the fiber strands 20 emerging out of the blast opening 3 can expand freely.
  • a partial stretch is formed by several conducting means 19 in the open space 18, in which partial stretch a suction stream formed out of the ambient air is supplied to the blowing stream.
  • the conducting means 19 are formed on each side of the drawing unit 1 by suction channels 16.1 and 16.2.
  • the suction channel 16.1 is provided on a belt discharge side 10 and the suction channel 16.2 is provided on the belt supply side 11.
  • the suction channel 16.1 is coupled on the lower side of the drawing unit 1 by means of an outlet opening 15.1 to the blowing stream entering into the open space 18.
  • the opposite end of the suction channel 16.1 comprises a suction opening 17.1, which is connected to the ambience extending above the open space next to the drawing unit 1.
  • the suction opening 17.1 has an opening cross-section, which is turned away from the upper side of the deposit belt 6.
  • the suction channel 16.2 comprises the outlet opening 15.1 [sic: 15.2] and a suction opening 17.2 in a mirror-symmetrical arrangement.
  • the suction opening 17.2 is likewise coupled to the ambience extending above the open space next to the drawing unit 1.
  • the open space 18 in the area below the drawing unit 1 is thus connected to the ambience by means of the suction channels 16.1 and 16.2. Due to the upwardly directed suction openings 17.1 and 17.2, the ambient air suctioned by the blowing stream is withdrawn in operation from an ambience, which is not critical for depositing the fibers on the deposit belt 6.
  • the suction stream is generated in the form of two equal partial suction streams, which are supplied to the blowing stream on both the longitudinal sides of the fiber curtain by means of the outlet openings 15.1 and 15.2.
  • the suction stream is also possible to select very short guidance distances between the drawing unit 1 and the deposit belt 6 for producing fine and light non-wovens.
  • the open space 18 extends over a length, which exceeds at least half of the guidance distance.
  • the blowing stream expands increasingly with its progressive motion with the result that a correspondingly large mobility of the fiber strands is achieved both in the running direction of the deposit belt - also referred to as the machine direction and also in a cross direction thereto.
  • the open space 18 is delimited by the guidance means 7.1 and 7.2, which are assigned to the upper side of the deposit belt.
  • the guidance means 7.1 and 7.2 are disposed on the belt discharge side 10 and on the belt supply side 11 respectively and form a guidance channel 9 between themselves.
  • the guidance channel 9 extends up to the upper side of the deposit belt 6.
  • the guidance channel 9 formed by the guidance means 7.1 and 7.2 is used in order to guide the blowing stream emerging out of the open space 18 by means of the guidance channel 9 for being deposited on the deposit belt 6.
  • the guidance channel 9 is divided into several sections, in order to enable both the entrance and the guidance of the blowing stream.
  • the guidance means 7.1 and 7.2 initially form a channel opening 8, which opens out convergently into a channel constriction 31.
  • the channel constriction 31 represents the smallest guidance width inside the guidance channel 9.
  • the channel constriction 31 gives way to a divergent channel outlet 32 with the result that the blowing stream, after its initial constriction, expands again due to a constant expansion of the channel constriction.
  • the fiber strands 20 are deposited on the deposit belt 6.
  • the guidance means 7.1 and 7.2 are each formed by a pivoted roller 12.1 and 12.2 in this exemplary embodiment.
  • the rollers 12.1 and 12.2 are in direct frictional contact with the deposit belt 6 or the surface of the non-woven 21 in order to effect a seal in relation to the external air.
  • the deposit region representing the end of the guidance channel 9 is thus shielded tightly from the ambience by each of the rollers 12.1 and 12.2.
  • the rollers 12.1 and 12.2 preferably comprise an elastic roller jacket 13 for this purpose.
  • the exhaust equipment 22 is disposed on the lower side of the deposit belt 6.
  • the exhaust effect of the exhaust equipment 22 is limited to the deposit region of the guidance channel 9.
  • the exhaust equipment 22 comprises an adjustable exhaust opening 23, which is assigned directly to the deposit region on the deposit belt 6.
  • the exhaust opening 23 is formed between two mobile cover plates 24.1 and 24.2. Each of the cover plates 24.1 and 24.2 can be moved horizontally relative to one another.
  • sealing elements 25 are provided on the lower side of the deposit belt 6 so as to prevent external air from entering from the lower side of the deposit belt 6.
  • a feed fluid is supplied to the drawing unit 1.
  • Compressed air of a compressed air source is used preferably as the feed fluid, which flows into the conveying channel with an excess pressure lying in the range of 0.1 to 5 bar and preferably in a range of 0.5 to 3 bar.
  • the fiber strands 20 that are threaded into the conveying channel 5 by means of the fiber inlet 2 are continuously drawn off out of a spinning device (not shown).
  • the fibers are previously melt-spun from a polymer material in a row-shaped arrangement in the spinning device and then cooled.
  • the fiber strands 20 are accelerated by the feed fluid and blown out jointly through the blast opening 3 in the form of a blowing stream into the open space 18.
  • the blowing stream which is composed of the fibers and the feed fluid, is blown vertically through the blast opening 3 towards the deposit belt 6.
  • a low pressure is generated by the emerging blowing stream, which low pressure leads to the formation of a suction stream.
  • the suction streams are each supplied to the blowing stream on both sides thereof in the form of a partial suction stream.
  • the open space 18 on the lower side of the drawing unit 1 is connected by means of the outlet openings 15.1 and 15.2, the suction channel 16.1 and 16.2, and the suction openings 17.1 and 17.2 to the ambience located at a distance from the ambience of the deposit belt 6.
  • the suction openings 17.1 and 17.2 are formed at an inclination to the drawing unit 1 so that the ambience above the open space 18 laterally next to the drawing unit 1 is used in order to generate the ambient air for forming the partial suction streams on both longitudinal sides of the blowing stream.
  • the ambience directly below the suction channels 16.1 and 16.2 thus remains uninfluenced by the suction stream.
  • the blowing stream with the fiber strands 20 is blown into the guidance channel 9 formed by the guidance means 7.1 and 7.2. Due to the shape and design of the guidance channel 9 and the guidance means 7.1 and 7.2, the blowing stream is guided towards the deposit belt 6.
  • the channel constriction 31 formed in the guidance channel 9 brings about a narrowing of the blowing stream in order to then achieve the desired deposition form of the fibers on the deposit belt 6 by means of a divergent channel outlet 32. It has proved to be particularly advantageous here that the guidance width of the open space 18 is at least 5 times larger than the width of the channel constriction 31. It is thus possible to achieve, in particular, the desired effects for restricting the blowing stream.
  • the channel constriction 31 of the guidance channel 9 is designed with a guidance width in the range of 10 mm to max. 200 mm.
  • the open space 18 is designed with a guidance width in the range of 300 mm to 1,000 mm.
  • the inventive apparatus and the method of the invention thus enable a uniform and reproducible deposition of non-wovens, which can take place such that they can be controlled even at high fiber speeds, fine fiber deniers and light basis weights of the non-woven.
  • firstly the advantages of high stretching known from the process of blowing out the blowing stream into the open space and those depositing mechanisms that are known per se only in closed systems are combined advantageously.
  • Fig. 3 schematically shows a cross-sectional view of another exemplary embodiment of the inventive apparatus for implementing the method of the invention.
  • the exemplary embodiment shown in Fig. 3 is substantially identical to the previously described embodiment shown in fig. 1 and 2 . Hence only the differences therebetween are explained below and reference may be made to the previous description in all other respects.
  • the drawing unit 1 is designed to be identical to the one of the previous exemplary embodiment.
  • Air boxes 34.1 and 34.2 are each connected on the longitudinal sides of the drawing unit 1 on the lower side thereof.
  • the air box 34.1 is disposed on the belt discharge side 10 and an outlet opening 15.1 extending substantially over the entire width of the fiber strands is connected to the open space 18 formed below the drawing unit 1.
  • a suction channel 16.1 opens out into the air box 34.1, which suction channel forms a suction opening 17.1 at a free end thereof.
  • the suction opening 17.1 is formed on that side of the suction channel that is turned away from the deposit belt 6 and is directed towards the ambience extending laterally next to the drawing unit 1.
  • an air box 34.2 with the outlet opening 15.2 and the suction channel 16.2 are formed mirror-symmetrically to the air box 34.1 so as to generate a uniform and identical partial suction stream on each longitudinal side of the blowing stream, which partial suction streams enter the open space 18 together with the blowing stream for guiding the fiber strands 20.
  • the open space 18 is shielded from the ambience by laterally running separation walls 14.1 and 14.2.
  • the separation walls 14.1 and 14.2 extend towards the deposit belt 6 up to the guidance means 7.1 and 7.2.
  • the open space 18 formed by the separation walls 14.1 and 14.2 has a guidance width located in the range of 300 mm and 1,000 mm.
  • the guidance means 7.1 and 7.2 are formed by molded thin sheets 26.1 and 26.2 on the upper side of the deposit belt 6.
  • the shape of the guidance channel 9 is selected by means of the curvature of the thin sheets 26.1 and 26.2 in such a way that a convergent channel opening 8 opens out into a channel constriction 31 at the end of the open space 18.
  • the channel constriction 31 gives way to an expansion, which leads to a divergent channel outlet 32.
  • the thin sheets 26.1 and 26.2 each have oblong legs 30.1 and 30.2, which extend parallel to the deposit belt 6 and form a sealing gap 29.1 and 29.2 with the deposit belt 6 or with the non-woven web 21.
  • the length of the sealing gap 29.1 and 29.2 is selected such that the deposit region is completely shielded inside the guidance channel 9 on the deposit belt 6. Any frictional contact between the guidance means 7.1 and 7.2 with the non-woven web 21 or the deposit belt 6 is thus prevented on the upper side of the deposit belt.
  • the exhaust equipment 22 provided on the lower side of the deposit belt likewise has oblong sealing lips 35.1 and 35.2 in order to prevent the entry of external air from the ambience.
  • the functioning of the apparatus shown in Fig. 3 is substantially identical to that of the exemplary embodiment shown in Fig. 1 and 2 .
  • the air boxes 34.1 and 34.2 are disposed on both the longitudinal sides of the blowing stream, through which air boxes an ambient air is sucked in.
  • the ambient air stored in the air boxes 34.1 and 34.2 is withdrawn by means of the suction channels 16.1 and 16.2 and the suction openings 17.1 and 17.2 directly from an ambience that is not relevant to the deposition of the fiber strands.
  • the suction channels can be designed in a tubular manner. It is likewise possible to assign several suction channels to each of the air boxes 34.1 and 34.2.
  • the outlet openings 15.1 and 15.2 of the air boxes 34.1 and 34.2 extend substantially parallel to the width of the conveying channel 5 of the drawing unit 1.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)

Claims (13)

  1. Procédé pour étirer et déposer une pluralité de fibres pour former un non-tissé, procédé, dans lequel les fibres sont soutirées dans une rangée à l'aide d'un fluide d'alimentation après le filage par fusion, le fluide d'alimentation et les fibres étant soufflés pour prendre la forme d'un flux de soufflage hors d'un canal de transport dans un espace ouvert, dans le cas duquel le flux de soufflage génère un flux de succion, causé par un effet de succion naturel, lorsque le flux de soufflage émerge hors du canal de transport dans l'espace ouvert, et le flux de soufflage et le flux de succion sont guidés communément le long d'une distance de guidage courte jusqu'à une bande de dépôt pour déposer les fibres, le procédé étant caractérisé en ce que le flux de succion est généré hors de l'air ambiant d'en haut de l'espace ouvert et en dehors de l'ambiance qui influence le dépôt de fibres, dans le cas duquel le flux de succion est livré au flux de soufflage en forme de deux flux de succion partiels qui sont aspirés de manière uniforme sur les deux cotés longitudinaux du flux de soufflage, les flux de succion partiels étant chacun livré à l'aide d'un canal de succion latéral, l'air ambiant des flux de succion partiels étant aspirés à l'aide d'ouvertures de succion des canaux de succion et dans le cas duquel les ouvertures de succion des canaux de succion sont associées à l'ambiance latéralement proche de l'unité d'étirage et sont détournées de la bande de dépôt.
  2. Procédé selon la revendication 1, caractérisé en ce que le flux de soufflage est protégé contre l'ambiance dans au moins une région de dépôt et est absorbé et déchargé par un équipement d'aspiration, disposé en dessous de la bande de dépôt.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le flux de soufflage est protégé contre l'ambiance à l'intérieur de l'espace ouvert, le flux de succion n'étant alimenté que dans l'ambiance d'air soufflé des fibres.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'avant d'être déposé le flux de soufflage avec les fibres est déchargé dans un canal de guidage qui se charge de guider le flux de soufflage avec les fibres jusqu'à leur dépôt sur le coté supérieur de la bande de dépôt.
  5. Procédé selon la revendication 4, caractérisé en ce qu'après son passage à travers une construction de canal le flux de soufflage est guidé à travers une ouverture de canal convergente dans la transition entre l'espace ouvert et le canal de guidage et est guidé à travers une sortie de canal divergente après avoir traversé une restriction de canal.
  6. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 5 avec une unité d'étirage (1) qui est agencée en dessous d'un métier à filer et un canal de transport (5) en connexion avec une source de fluide pour recevoir les fibres (20) qui sont guidées dans une rangée, une bande de dépôt (6) qui est agencée en dessous de l'unité d'étirage (1) et qui est entraînée de manière telle qu'elle est dirigée transversalement par rapport à un coté longitudinal de l'unité d'étirage (1), et une distance de guidage courte réalisée entre l'unité d'étirage et la bande de dépôt (6), un flux de soufflage qui est généré par l'unité d'étirage (1), créant un flux de succion, causé par un effet de succion naturel, lorsque le flux de soufflage émerge hors du canal de transport (5) dans un espace ouvert (18), lequel dispositif étant caractérisé par au moins un moyen d'exécution (19) en dessous de l'unité d'étirage (1) pour fournir le flux de succion, généré hors de l'air ambiant d'en haut de l'espace ouvert (18) et en dehors de l'ambiance qui influence le dépôt de fibres (20), dans quel cas les moyens d'exécution (19) sont déposés chacun en dessous de l'unité d'étirage (1) sur les deux cotés longitudinaux du flux de soufflage et en ce que les moyens d'exécution (19) sont formés de façon identique pour générer des flux de succion partiels égaux, les moyens d'exécution (19) étant formés par deux canaux de succion (16.1, 16.2) directement en dessous de l'unité d'étirage (1), les canaux de succion (16.1, 16.2) étant connectés avec l'espace ouvert (18) au moyen d'ouvertures de sortie (15.1, 15.2) en dessous de l'unité d'étirage (1) et au moyen d'ouvertures de succion (17.1. 17.2) l'ambiance et les ouvertures de succion (17.1, 17.2) des canaux de succion (16.1, 16.2) étant associés à l'ambiance latéralement proche de l'unité d'étirage (1) et donc détournés de la bande de dépôt (6).
  7. Dispositif selon la revendication 6, caractérisé en ce que les ouvertures de succion (17.1, 17.2) des canaux de succion (16.1, 16.2) sont associées à l'ambiance latéralement proche de l'unité d'étirage (1), de sorte qu'ils soient détournés de la bande de dépôt (6).
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce qu'une pluralité de moyens de guidage (7.1, 7.2) est associée à la bande de dépôt (6) sur le côté supérieur de cette dernière et une installation d'évacuation (22) est associée à la bande de dépôt sur le côté inférieur de celle-ci, les moyens de guidage et l'installation d'évacuation formant une région de dépôt protégée.
  9. Dispositif selon la revendication 8, caractérisé en ce qu'en dessous de la bande de dépôt (6) une ouverture de succion déplaçable (23) est formée, au moyen de laquelle l'installation d'évacuation (22) est connectée avec le côté inférieur de la bande de dépôt (6).
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que les moyens de guidage (7.1, 7.2) forment un canal de guidage (9) pour recevoir et pour guider le flux de soufflage, une ouverture de canal (8) du canal de guidage (9) étant formée de façon convergente par les moyens de guidage (7.1, 7.2) et l'ouverture de canal (8) s'ouvrant dans un étranglement de canal (31) du canal de guidage (9).
  11. Dispositif selon la revendication 9, caractérisé en ce que la largeur de guidage de l'espace ouvert (18) est au moins cinq fois plus large que la largeur de l'étranglement de canal (31) du canal de guidage (9).
  12. Dispositif selon l'une des revendications 6 à 10, caractérisé en ce que la longueur de la distance de guidage entre l'unité d'étirage (1) et la bande de dépôt (6) se trouve dans la marge de 100 mm à 700 mm.
  13. Dispositif selon l'une des revendications 6 à 11, caractérisé en ce que l'espace ouvert (18) sur un côté alimentation en bande (11) et sur un côté déchargement de bande (10) est protégé contre l'ambiance par des parois (14.1, 14.2).
EP08707966A 2007-01-31 2008-01-17 Procédé et appareil pour étirer et déposer une pluralité de fibres pour former un non-tissé Not-in-force EP2126165B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007004793 2007-01-31
PCT/EP2008/050519 WO2008092749A1 (fr) 2007-01-31 2008-01-17 Procédé et appareil pour étirer et déposer une pluralité de fibres pour former un non-tissé

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EP2126165A1 EP2126165A1 (fr) 2009-12-02
EP2126165B1 true EP2126165B1 (fr) 2011-03-16

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CN (1) CN101600821B (fr)
AT (1) ATE502141T1 (fr)
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ES2886885T3 (es) * 2019-07-30 2021-12-21 Reifenhaeuser Masch Dispositivo y procedimiento para la fabricación de un material no tejido a partir de fibras
CN212316388U (zh) * 2020-02-13 2021-01-08 上海捷英途新材料科技有限公司 一种熔喷滤布的生产装置
CN114075700B (zh) * 2020-08-19 2022-11-29 中国科学院宁波材料技术与工程研究所 一种链式预调制熔喷方法、链式预调制熔喷头及熔喷装置
CN112553784B (zh) * 2020-11-13 2023-03-17 广西德福莱医疗器械有限公司 熔喷布吸附辊

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FR2792655B1 (fr) * 1999-04-23 2001-06-01 Icbt Perfojet Sa Installation pour la fabrication d'une nappe textile non tissee et procede de mise en oeuvre d'une telle installation
EP1340844B1 (fr) * 2002-02-28 2007-09-26 Reifenhäuser GmbH & Co. KG Maschinenfabrik Appareil de fusion-soufflage
DE50211736D1 (de) * 2002-02-28 2008-04-03 Reifenhaeuser Gmbh & Co Kg Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn
DE10311439A1 (de) * 2003-03-15 2004-09-23 Saurer Gmbh & Co. Kg Vorrichtung und Verfahren zum Spinnen und Ablegen einer synthetischen Fadenschar zur Vlieserzeugung
DE10322460B4 (de) * 2003-05-16 2007-02-08 Corovin Gmbh Verfahren und Vorrichtung zur Herstellung eines Spinnvlieses aus Filamenten aus aufgeplatzten Fasern, Filamente aus aufgeplatzen Fasern und Vliesstoff
WO2005093138A1 (fr) * 2004-03-26 2005-10-06 Saurer Gmbh & Co. Kg Procede et dispositif de filage a chaud de fines fibres synthetiques
US7798795B2 (en) * 2005-03-12 2010-09-21 Saurer Gmbh & Co. Kg Method and apparatus for forming a non-woven web by deposition of synthetic filaments

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WO2008092749A1 (fr) 2008-08-07
DE602008005561D1 (de) 2011-05-05
ATE502141T1 (de) 2011-04-15
CN101600821A (zh) 2009-12-09
EP2126165A1 (fr) 2009-12-02
CN101600821B (zh) 2011-09-07

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