EP4077790A1 - Procédé de production de tissu non tissé - Google Patents

Procédé de production de tissu non tissé

Info

Publication number
EP4077790A1
EP4077790A1 EP20821213.4A EP20821213A EP4077790A1 EP 4077790 A1 EP4077790 A1 EP 4077790A1 EP 20821213 A EP20821213 A EP 20821213A EP 4077790 A1 EP4077790 A1 EP 4077790A1
Authority
EP
European Patent Office
Prior art keywords
spunbond
filaments
spunbonded
spinneret
layer
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.)
Pending
Application number
EP20821213.4A
Other languages
German (de)
English (en)
Inventor
Ibrahim SAGERER-FORIC
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.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
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 Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP4077790A1 publication Critical patent/EP4077790A1/fr
Pending legal-status Critical Current

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
    • 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
    • D01D5/06—Wet spinning methods
    • 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
    • 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
    • D01D5/12—Stretch-spinning methods
    • D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/013—Regenerated cellulose series
    • 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
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/20—Cellulose-derived artificial fibres
    • D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions

Definitions

  • the present invention relates to a method for the production of spunbonded nonwovens, in which a spinning mass is extruded through a plurality of nozzle holes of at least one first spinneret and a second spinneret to form filaments and the filaments are each stretched in the extrusion direction, the filaments of the first spinneret to form one first spunbonded nonwovens are deposited on the conveyor belt and the filaments of the second spinning nozzle to form a second spunbonded nonwoven are deposited over the first spunbonded nonwoven on the conveyor belt in order to obtain a multi-layer spunbonded nonwoven.
  • US 2018/0282922 A1 also discloses methods for producing spunbonded fabrics in which a spinning mass is extruded at least through a first spinneret and a second spinneret downstream of the first spinneret, so that the filaments extruded from the second spinneret over which filaments extruded from the first spinneret are deposited, forming a multi-layer spunbonded nonwoven.
  • a spinning mass is extruded at least through a first spinneret and a second spinneret downstream of the first spinneret, so that the filaments extruded from the second spinneret over which filaments extruded from the first spinneret are deposited, forming a multi-layer spunbonded nonwoven.
  • the processes mentioned suffer from the disadvantage that an increase in throughput is only possible to a very limited extent without impairing the quality of the spunbonded nonwovens.
  • the invention has therefore set itself the task of improving a method for producing spunbonded nonwoven of the type mentioned at the outset in such a way that the throughput of the method can be increased in a cost-effective and simple manner.
  • the object is achieved in that, in a subsequent step, the multi-layer spunbonded nonwoven is separated into at least the first spunbonded nonwoven and the second spunbonded nonwoven and, after the separation, the first and second spunbonded nonwoven each go through a hydroentanglement and optionally a drying, and / or are each wound up individually .
  • the throughput of the process can be increased in a simple manner, since at least two spinning nozzles are provided for the simultaneous formation of at least two spunbonded webs be, but the multi-layer spunbonded nonwoven formed can be further processed with the available means instead of a single spunbonded nonwoven.
  • the second spinneret is preferably located downstream of the first spinneret in the conveying direction of the conveyor belt.
  • the multi-layer spunbonded nonwoven formed in the process consists of the first and second spunbonded nonwoven, the second spunbonded nonwoven being arranged above the first.
  • the first and second spunbond can be connected to one another (for example by adhesion) in such a way that the multi-layer spunbond forms a unit that can go through further process steps, but can be separated again into these essentially without structural damage to the first and second spunbond.
  • the multi-layer spunbonded web is separated into at least the first and second spunbonded web in a subsequent step, at least two independent spunbonded webs can again be obtained in the course of the process.
  • a cost-effective method for producing spunbonded nonwoven with increased throughput can thus be created.
  • the spinning mass can also be extruded into filaments through a third and further spinning nozzle and the filaments are each stretched in the extrusion direction, the filaments of the third spinning nozzle to form a third spunbond over the second Spunbond can be placed on the conveyor belt in order to obtain the multi-layer spunbond, or the filaments of the further spinning nozzles to form further spunbond are placed over the respective preceding spunbond on the conveyor belt in order to obtain the multi-layer spunbond.
  • Such a multi-layer spunbonded web can have a large number of spunbonded webs, which can be separated from one another again in a later process step.
  • the method can be particularly noteworthy if the first and second spunbonded nonwovens each undergo a separate hydroentanglement process after being separated.
  • a disadvantageous connection between the first and second spunbonded nonwoven in the multi-layer spunbonded nonwoven can be avoided, which would make a later non-destructive separation of the multi-layered spunbonded nonwoven more difficult.
  • the separate hydroentanglement of the spunbonded nonwovens can then advantageously improve the internal structure or the internal cohesion.
  • the first and second spunbonded nonwovens can also individually go through a drying process after the respective hydroentanglement in order to obtain finished spunbonded nonwovens that can be wound up.
  • the finished treated or separated spunbonded webs can then each be wound up individually in order to obtain at least two spunbonded webs at the same time.
  • a spunbonded nonwoven in the sense of the present disclosure is understood to mean a nonwoven fabric which is formed directly by depositing extruded filaments, the filaments being essentially continuous filaments and being laid in a random position to form the spunbonded nonwoven.
  • the aforementioned advantages of the method can be particularly noticeable when the multi-layer spunbonded nonwoven passes through at least one treatment step before it is separated into at least the first and second spunbonded nonwoven. This is because a joint treatment of the first and second spunbonded nonwovens can take place in the form of the multilayered spunbonded nonwoven and thus the throughput of the method can be significantly increased compared to the separate treatment of the spunbonded nonwovens.
  • the at least one treatment step of the multi-layer spunbonded nonwoven is washing or drying.
  • the at least one treatment step of the multi-layer spunbond can also be a hydroentanglement, the first and second spunbond remaining non-destructively separable after the hydroentanglement in the multi-layer spunbond.
  • thermoplastic spunbond nonwovens washing is usually not necessary, as it is a so-called “dry” spinning process, whereby any solvents that may be used evaporate from the spunbonded by themselves after the calender or dryer.
  • the spunbonded nonwoven is wound up into rolls immediately after extrusion and deposition in such a process.
  • the throughput is generally limited by the length of the laundry, since the spunbonded fabrics have to achieve certain dwell times in the laundry to wash out the solvent.
  • very low basis weights very long washing systems would have to be used in order to achieve the same throughput as with higher basis weights.
  • the method according to the invention with washing the first and second spunbonded nonwoven together in the multi-layer spunbonded nonwoven can therefore significantly reduce the length of the laundry or increase the throughput. Furthermore, the residual solvent content in the spunbonded nonwoven produced can be reduced.
  • the production speed in the manufacture of single-layer spunbonded nonwoven with a weight per unit area of 40 g / m 2 with a cellulose throughput of 300 kg / h / m is 125 m / min.
  • the individual spunbonded nonwovens already have a weight per unit area of 40 g / m 2 .
  • the production speed is then reduced to 62.5 m / min with two superimposed spunbonded fabrics and 300kg / h / m cellulose throughput. It has been shown that the effectiveness of the individual washing stages is not only doubled, but up to eightfold. Since the dwell time has a serious effect on the efficiency of the laundry, doubling the dwell time can lead to 4 to 8 times less residual solvent in the spunbonded nonwoven.
  • the cost of the process can be further reduced if the wash is a multi-stage countercurrent wash.
  • the water used for washing circulates in several washing stages, with fresh water being added at the end of the washing and being successively carried on to the upstream washing stages, and the used washing water being discharged at the beginning of the washing.
  • the first and second spinning nozzles for drawing the filaments are preferably each assigned a drawing air stream.
  • the spinnerets can thus control the extrusion and drawing conditions of the filaments independently of one another, and thus produce two independent and mutually different first and second spunbonded nonwovens. A particularly flexible and versatile process can thus be created.
  • the drawing air stream is directed from the respective spinneret onto the extruded filaments.
  • the drawing air stream can have a pressure of 0.05 bar to 5 bar, preferably 0.1 bar to 3 bar, particularly preferably 0.2 bar to 1 bar.
  • the drawing air stream can furthermore have a temperature of from 20 ° C. to 200 ° C., preferably from 60 ° C. to 160 ° C., particularly preferably from 80 ° C. to 140 ° C.
  • the method according to the invention is particularly suitable for the production of cellulosic spunbonded nonwovens, the spinning mass being a lyocell spinning mass, that is to say a solution of cellulose in a direct solvent for cellulose.
  • a direct solvent for cellulose is a solvent in which the cellulose is present in dissolved form in a non-derivatized form.
  • This can preferably be a mixture of a tertiary amine oxide, such as NMMO (N-methylmorpholine-N-oxide), and water.
  • NMMO N-methylmorpholine-N-oxide
  • ionic liquids or mixtures with water are also suitable as direct solvents.
  • the cellulose content in the spinning mass can be 3% by weight to 17% by weight, in preferred embodiment variants 5% by weight to 15% by weight, and in particularly preferred embodiment variants 6% by weight to 14% by weight. -%.
  • the method according to the invention can ensure a higher throughput or shortening of the laundry, particularly in the production of cellulosic spunbonded nonwovens.
  • the throughput of cellulose per spinneret can preferably be between 5 kg / h per meter of spinneret length and 500 kg / h per meter of spinneret length.
  • the internal structure of the spunbonded nonwovens can also be reliably controlled if the filaments of the first and second spinning nozzle are at least partially coagulated.
  • the first and second spinning nozzle can each be assigned a coagulation air stream, which has a coagulation liquid, for at least partial coagulation of the filaments, whereby the internal structure of the first and second spunbond can be controlled independently of one another.
  • a stream of coagulation air can preferably be a fluid containing water and / or a fluid containing coagulant, for example gas, mist, steam, etc.
  • the coagulation liquid is a mixture of water and a direct solvent for cellulose.
  • the coagulation liquid can be a mixture of fully deionized water and 0% by weight to 40% by weight NMMO, preferably 10% by weight to 30% by weight NMMO, particularly preferably 15% by weight to 25% by weight. % NMMO, be.
  • the amount of coagulation liquid can preferably be 50 l / h to 10,000 l / h, more preferably 100 l / h to 5,000 l / h, particularly preferably 500 l / h to 2,5001 / h per meter of coagulation nozzle.
  • the second spunbonded nonwoven can preferably have a weight per unit area different from the first spunbonded nonwoven, as a result of which a particularly flexible method can be created.
  • the weight per unit area of the first and second spunbonded nonwoven can be 5 g / m 2 (gsm) to 500 g / m 2 , preferably 10 g / m 2 to 250 g / m 2 , particularly preferably 15 g / m 2 to 100 g / m 2 , amount.
  • the invention has also set itself the task of improving a device for producing spunbonded nonwoven according to the preamble of claim 12 in such a way that it enables an increase in production throughput in a structurally simple and cost-effective manner.
  • the second spinning nozzle of the device is arranged in the conveying direction of the conveyor belt after the first spinning nozzle in such a way that the second spunbonded web is deposited on the conveyor belt over the first spunbonded web to form a multilayered spunbonded web
  • a device can be created in a structurally simple manner which consists of two spunbond webs forms existing multi-layer spunbond on the conveyor belt. If the device also has a separating device fed via the conveyor belt for separating the multi-layer spunbonded web into individual spunbonded webs, a compact and inexpensive device with increased throughput can also be provided by the multi-layered spunbonded web being conveyed together again into its individual spunbonded webs by the separating device is separated
  • the aforementioned advantages can be particularly noticeable in a device which has a laundry for washing the multi-layer spunbonded nonwoven fabric, which is arranged in the conveying direction of the conveyor belt between the spinneret and the separating device.
  • the device can namely provide a common wash with increased throughput for the multi-layer spunbonded web before the multi-layered spunbonded web is separated again into the individual spunbonded webs in the separating device.
  • the device has at least a first and a second winding device, the winding devices being fed by the severing device, a structurally simple device with high throughput can be created which enables individual spunbonded nonwovens to be obtained simultaneously.
  • the device can have at least a first and a second hydroentanglement, with hydroentanglement being provided between a severing device and a winding device.
  • the hydroentanglement are each fed from the splitting device with the spunbonded nonwovens and can also subject them to hydroentanglement. After hydroentangling, the spunbonded nonwovens are transferred to the winding device.
  • FIG. 1 shows a schematic representation of the method and a device according to a first embodiment variant
  • FIG. 2 shows a schematic representation of the method and a device according to a second embodiment variant.
  • a spinning mass 2 is produced from a cellulosic raw material and fed to a first spinneret 3.1, a second spinneret 3.2 and a third spinneret 3.3 of the device 200.
  • the cellulosic raw material for the production of the spinning mass 2 which production is not shown in detail in the figures, can be a conventional pulp made of wood or other vegetable raw materials. However, it is also conceivable that the cellulosic raw material consists of production waste from spunbond production or recycled textiles.
  • the spinning mass 2 is a solution of cellulose in NMMO and water, the cellulose content in the sense mass being between 3% by weight and 17% by weight.
  • the device 200 has three spinnerets 3.1, 3.2, 3.3 for extrusion of a spinning mass 2 into filaments 5.1, 5.2, 5.3.
  • the spinning mass 2 is extruded in the spinnerets 3.1, 3.2, 3.3 through a plurality of nozzle holes 4.1, 4.2, 4.3, which are assigned to the respective spinneret 3.1, 3.2, 3.3, to form the filaments 5.1, 5.2, 5.3.
  • Each spinneret 3.1, 3.2, 3.3 also has stretching devices 4.1, 4.2, 4.3 for stretching the extruded filaments 5.1, 5.2, 5.3, whereby the first, second and third spinnerets 3.1, 3.2, 3.3 are each assigned a stretching air stream for the stretching.
  • stretching air 6 is fed to the stretching devices in the spinnerets 3.1, 3.2, 3.3 and the filaments 5.1, 5.2, 5.3 are stretched in the extrusion direction by the stretching air flow as they exit from the spinnerets 3.1, 3.2, 3.3.
  • the stretching air 6 can from openings in the Spinning nozzles 3.1, 3.2, 3.3 emerge between the nozzle holes 4.1, 4.2, 4.3 and are directed as a stretching air stream directly onto the extruded filaments 5.1, 5.2, 5.3.
  • the extruded filaments 5.1, 5.2, 5.3 are preferably acted upon by a coagulation air stream 7.1, 7.2, 7.3 after or already during the stretching, with at least one coagulation air stream 7.1, 7.2, 7.3 being assigned to the spinnerets 3.1, 3.2, 3.3 and by a coagulation device 8.1, 8.2, 8.3 is generated.
  • Coagulation air streams 7.1, 7.2, 7.3 usually have a coagulation liquid, for example in the form of steam, mist, etc.
  • a coagulation liquid for example in the form of steam, mist, etc.
  • the drawn and at least partially coagulated filaments 5.1 of the first spinneret 3.1 are then placed in a random position on a conveyor belt 9 of the device 200 to form a first spunbonded web 1.1.
  • the second spinneret 3.2 is arranged in the conveying direction of the conveyor belt 9 after the first spinneret 3.1 in such a way that the drawn and at least partially coagulated filaments 5.2 of the second spinning nozzle 3.2 are deposited in a random position over the first spunbond 1.1 on the conveyor belt 9 to form a second spunbond 1.2.
  • the drawn and at least partially coagulated filaments 5.3 of the third spinneret 3.3 are deposited over the second spunbond 3.2 on the conveyor belt 9, namely by the third spinneret 3.3 being arranged in the conveying direction of the conveyor belt 9 after the second spinneret 3.2.
  • a multi-layer spunbond 10 is formed in which the spunbond 1.1, 1.2, 1.3 are detachably connected to one another.
  • the detachable connection between the spunbonded nonwovens 1.1, 1.2, 1.3 to the multi-layer spunbonded nonwoven 10 is designed in such a way that a non-destructive separation of the multi-layered spunbonded nonwoven 10 into the individual spunbonded nonwovens 1.1, 1.2, 1.3 is possible even after further treatment steps.
  • the multilayer spunbonded nonwoven 10 is passed after the formation over the conveyor belt 9 through a laundry 11 in which the multilayered spunbonded nonwoven 10 is washed in order to free it from residues of the solvent, namely the NMMO contained in the spinning mass 2.
  • the washing 11 is a multi-stage countercurrent washing, which, however, was not shown in the figures.
  • the washed multilayer spunbonded nonwoven 10 is then fed to a drying unit 12 in a next step in order to remove the remaining moisture.
  • the laundry 11 is in particular in The conveying direction of the conveyor belt 9 is arranged between the spinnerets 3.1, 3.2, 3.3 and a later separating device 13.
  • the multi-layer spunbond 10 can undergo additional hydroentanglement, the spunbond 1.1, 1.2, 1.3 in the multi-layer spunbond 10 still remaining non-destructively separable.
  • the washed and dried multi-layer spunbond 10 is separated into the first spunbond 1.1, the second spunbond 1.2 and the third spunbond 1.3 in a separating device 13 fed by the conveyor belt 9 with the multi-layer spunbond 10, the spunbond 1.1, 1.2, 1.3 each separating one Winding device 14.1, 14.2, 14.3 are fed in order to simultaneously obtain the finished spunbonded nonwovens 1.1, 1.2, 1.3.
  • the separating device 13 has an inlet for the multi-layer spunbonded nonwoven 10, and several outputs for the spunbonded nonwovens 1.1, 1.2, 1.3, the input of the separating device 13 being connected to the dryer 12, and the outputs each being connected to the winding devices 14.1, 14.2,
  • FIG. 2 shows a schematic representation of a method 101 for the simultaneous production of several cellulosic spunbonded nonwovens 1.1, 1.2, 1.3, according to a second embodiment of the invention, as well as a corresponding device 201 for carrying out the method 101 - as described above for the method 200 of the first embodiment - fed to a first spinneret 3.1, a second spinneret 3.2 and a third spinneret 3.3 of the device 201 and extruded, stretched and at least partially coagulated into filaments 5.1, 5.2, 5.3.
  • the stretched and at least partially coagulated filaments 5.1 of the first spinning nozzle 3.1 are then again placed in a random position on the conveyor belt 9 to form a first spunbonded web 1.1, the filaments 5.2 of the second spinning nozzle 3.2 are placed over the first spunbonded web 1.1 in a randomized manner to form a second spunbonded web 1.2 deposited on the conveyor belt 9, and the filaments 5.3 of the third spinneret 3.3 are used to form a third spunbond
  • a multi-layer spunbonded nonwoven 10 is formed in which the spunbonded nonwovens 1.1, 1.2, 1.3 are arranged one above the other and are releasably connected to one another.
  • the multi-layer spunbond 10 is then guided over the conveyor belt 9 through a laundry 11 in which the multi-layer spunbond 10 is washed and freed from solvent residues (in particular NMMO).
  • the multi-layer spunbonded nonwoven 10 is fed to a severing device 13 after washing 11 and separated into the first spunbond 1.1, the second spunbond 1.2 and the third spunbond 1.3.
  • the device 201 has a plurality of hydroentanglement 15.1, 15.2, 15.3 for the individual spunbonded nonwovens 1.1, 1.2, 1.3.
  • the spunbonded nonwovens 1.1, 1.2, 1.3 then each separately pass through a hydroentanglement 15.1, 15.2, 15.3, in which the mechanical properties of the spunbonded nonwovens 1.1, 1.2, 1.3 can be changed or influenced separately from one another.
  • 15.1, 15.2, 15.3 perforation patterns, embossing patterns or the like can be introduced into the spunbonded nonwovens 1.1, 1.2, 1.3, although this was not shown in detail in the figures.
  • the hydroentanglement 15.1, 15.2, 15.3 are each provided between the severing device 13 and later winding device 14.1, 14.2, 14.3 for the spunbonded nonwovens 1.1, 1.2, 1.3.
  • the spunbonded webs 1.1, 1.2, 1.3 are then brought together again for common drying 12, and after the common drying 12 again separated into the individual spunbonded webs 1.1, 1.2, 1.3 and fed to the respective winding devices 14.1, 14.2, 14.3.
  • Separate merging and separating devices can be provided for bringing together and severing the spunbonded nonwovens 1.1, 1.2, 1.3 before and after drying 12, which is not shown in the figures.
  • the drying 12 can after the separation of the multilayer spunbond 10 in the separating device 13 and after the hydroentanglement 15.1, 15.2, 15.3 for each spunbond 1.1, 1.2, 1.3 take place separately.
  • the spunbonded nonwovens 1.1, 1.2, 1.3 do not have to be brought together before drying 12 and then separated again.
  • the spunbonded nonwovens 1.1, 1.2, 1.3 can be produced by the spinnerets 3.1, 3.2, 3.3 each with different weights per unit area, for example by changing the mass throughput through the spinnerets 3.1, 3.2, 3.3.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un procédé (100, 101) de production de tissus non tissés (1.1, 1.2, 1.3) et un appareil (200, 201) de production de tissus non tissés (1.1, 1.2, 1.3) dans lequel procédé (100, 101), un composé de filage (2) est extrudé en filaments (5.1, 5.2, 5.3) à travers une multiplicité de trous de buse (4.1, 4.2, 4.3) d'au moins une première filière (3.1) et d'une seconde filière (3.2) et les filaments (5.1, 5.2, 5.3) sont chacun étirés dans la direction d'extrusion, les filaments (5.1) de la première filière (3.1), afin de former un premier tissu non tissé (1.1), étant déposés sur la courroie transporteuse (9) et les filaments (5.2) de la deuxième filière (3.2), afin de former un deuxième tissu non tissé (1.2) sur le premier tissu non tissé (1.1), étant déposés sur la courroie transporteuse (9) pour obtenir un tissu non tissé multicouche (10). Afin d'augmenter le rendement du procédé, l'invention propose de séparer le tissu non tissé multicouche (10) dans une étape consécutive en au moins le premier tissu non tissé (1.1) et le second tissu non tissé (1.2) et le premier et le second tissu non tissé (1.1, 1.2), après séparation, subissant chacun individuellement une consolidation par jet d'eau (15.1, 15.2) et facultativement un séchage (12), et/ou étant chacun individuellement enroulés.
EP20821213.4A 2019-12-17 2020-12-11 Procédé de production de tissu non tissé Pending EP4077790A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19217034 2019-12-17
PCT/EP2020/085772 WO2021122378A1 (fr) 2019-12-17 2020-12-11 Procédé de production de tissu non tissé

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EP4077790A1 true EP4077790A1 (fr) 2022-10-26

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US (1) US20230051927A1 (fr)
EP (1) EP4077790A1 (fr)
CN (1) CN115066525A (fr)
TW (1) TW202130874A (fr)
WO (1) WO2021122378A1 (fr)

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ES2555148T3 (es) * 2006-10-30 2015-12-29 Suominen Corporation Método para la fabricación de no tejidos blandos, resistentes y con volumen y no tejidos así obtenidos
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US20100159775A1 (en) * 2008-12-19 2010-06-24 Chambers Jr Leon Eugene Nonwoven Composite And Method For Making The Same
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EP2982488A1 (fr) * 2014-08-04 2016-02-10 Ube Engineering Plastics S.A. Procédé de fabrication de deux ou plusieurs films polymères simultanément sur une seule machine de fabrication de film
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AT519489B1 (de) 2016-10-21 2021-11-15 Chemiefaser Lenzing Ag Verfahren und Vorrichtung zum Herstellen von Vliesen auf Cellulosebasis, die direkt aus Lyocell-Spinnlösung gebildet werden
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CN115066525A (zh) 2022-09-16
WO2021122378A1 (fr) 2021-06-24
TW202130874A (zh) 2021-08-16
US20230051927A1 (en) 2023-02-16

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