WO2021122379A1 - Procédé de production de non-tissé filé-lié - Google Patents

Procédé de production de non-tissé filé-lié Download PDF

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Publication number
WO2021122379A1
WO2021122379A1 PCT/EP2020/085773 EP2020085773W WO2021122379A1 WO 2021122379 A1 WO2021122379 A1 WO 2021122379A1 EP 2020085773 W EP2020085773 W EP 2020085773W WO 2021122379 A1 WO2021122379 A1 WO 2021122379A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor
spunbond
filaments
spunbonded
deposited
Prior art date
Application number
PCT/EP2020/085773
Other languages
German (de)
English (en)
Inventor
Ibrahim SAGERER-FORIC
Original Assignee
Lenzing Aktiengesellschaft
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 Aktiengesellschaft filed Critical Lenzing Aktiengesellschaft
Priority to KR1020227023947A priority Critical patent/KR20220111706A/ko
Priority to CN202080087875.3A priority patent/CN114787440B/zh
Priority to JP2022537034A priority patent/JP2023506903A/ja
Priority to BR112022011701A priority patent/BR112022011701A2/pt
Priority to EP20821214.2A priority patent/EP4077789A1/fr
Priority to US17/785,481 priority patent/US20230020186A1/en
Publication of WO2021122379A1 publication Critical patent/WO2021122379A1/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
    • D04H3/013—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
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—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
    • D04H3/03—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 at random
    • 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
    • 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

Definitions

  • the present invention relates to a method for producing spunbonded nonwoven, in which a spinning mass is extruded through the nozzle holes of at least one spinning nozzle to form filaments, the filaments are stretched in the extrusion direction and placed on a first conveyor to form the spunbonded nonwoven, and in which the spunbonded nonwoven is at least one Is subjected to laundry.
  • washing is generally not necessary in the manufacture of thermoplastic spunbonded fabrics, as it is a so-called “dry” spinning process, whereby any solvents that may be used evaporate from the spunbonded nonwoven by themselves after the calender or dryer.
  • the spunbonded nonwoven is wound up into rolls immediately after extrusion and deposition in such processes.
  • spinning processes that require washing such as cellulosic spunbonded fabrics
  • the throughput is usually limited by the length of the laundry, since the spunbonded fabrics are used to wash out the Solvent must reach certain residence times in the laundry.
  • the looped spunbond can only be transported through the coagulation bath at low conveying speeds, since the buoyancy of the spunbond in the coagulation bath creates a great resistance to the spunbond. An increase in throughput is therefore not possible without a drastic loss of quality.
  • the invention has therefore set itself the task of improving a method for the production of spunbond 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 without impairing the quality of the spunbond.
  • the object is achieved in that the spunbond of the laundry is at least partially subjected to a perforated second conveyor with a lower conveying speed than the first conveyor, the spunbond in the laundry being sprayed with washing liquid and the washing liquid being at least partially discharged through the perforated second conveyor .
  • the dwell time of the Spunbonded in the laundry can be increased without providing an expensive longer wash.
  • a spunbonded web with a predefined basis weight can be obtained, the quality of the spunbonded web obtained, in particular its residual solvent content after washing, being improved.
  • the conveying speed which, as shown above, results from the spinning mass throughput and the desired weight per unit area, can be completely decoupled from the conveying speed of the laundry.
  • the length of the laundry, the length of the system or the building and thus also the costs for setting up and operating a system for carrying out the method can be significantly reduced.
  • the reliability and efficiency of the laundry can be further improved.
  • the assisted transport of the spunbonded nonwoven by the second conveyor device during the wash can namely ensure reliable and efficient washing even at high conveying speeds, since in comparison to a bath wash there is no buoyancy and water resistance on the spunbonded nonwoven.
  • a buoyancy or water resistance in a laundry bath can namely lead to entanglement or clumping in the spunbonded nonwoven and thus render the nonwoven fabric unusable at high conveying speeds, for example from 100 m / min to 500 m / min. This is particularly the case when the spunbond material within the laundry has a lower conveying speed than before the laundry, since the lower conveying speed results in an excess length of the spunbonded nonwoven in the laundry and the spraying with washing liquid reliably holds the excessively long spunbonded nonwoven on the second conveyor can be.
  • a spunbonded nonwoven completely soaked in washing liquid can absorb 10 to 15 times as much liquid, based on its own weight.
  • spunbonded nonwovens that have never been dried have very low strengths, such complete soaking of the spunbonded nonwoven leads to further structural weakening and thus to increased tears, which prevents reliable further transport.
  • the laundry according to the invention can therefore increase the throughput of the method without any negative effects on the quality of the spunbonded nonwoven produced.
  • the spunbonded nonwoven can have a liquid content of less than 5 kg / kg, based on its dry weight.
  • the liquid content can be less than 4 kg / kg, or in yet another preferred embodiment less than 3 kg / kg. Due to the low liquid content, the internal structure and stability of the spunbond can be retained, which means that transport is still possible even at high conveying speeds.
  • a spunbonded nonwoven in the sense of the present disclosure is understood to mean a nonwoven which is formed directly by depositing extruded filaments, the filaments being essentially endless filaments and being laid in a random position in order to form the spunbonded nonwoven.
  • a conveying device in the sense of the present invention can be understood to mean all devices which are suitable for conveying or transporting the spunbonded web at a certain conveying speed.
  • a conveyor device can be, for example, a conveyor belt, a conveyor drum, conveyor rollers or the like.
  • the conveying devices are designed as conveyor belts.
  • the conveying speed of the second conveying device is reduced by a factor between 1 and 1000 compared to the first conveying device.
  • the throughput can be doubled with the same weight per unit area and the same length of the laundry, or the effectiveness of the laundry can be significantly improved. It has been shown, for example, that doubling the dwell time in the laundry increases the efficiency more than linearly and, for example, leads to a reduction in solvent residues in the finished spunbonded nonwoven by a factor of 4 to 8.
  • the conveying speed is preferably reduced by a factor between 1 and 100, or particularly preferably by a factor between 1 and 25, before washing.
  • the reproducibility of the method can also be further improved if the spunbonded nonwoven is deposited in loops on the second conveyor device.
  • the loops can have essentially parallel, superimposed sections on the spunbonded nonwoven, which enable efficient washing of the spunbonded nonwoven and can be pulled apart again after washing without damage. In particular, after washing, the loops can be pulled apart again by a faster conveyor device.
  • the spunbond can preferably be deposited on the second conveyor immediately after the spunbond is deposited and formed on the first conveyor.
  • “immediately after laying” is understood to mean that no further treatment steps of the spunbonded web are provided on the first conveyor between the laying down and formation of the spunbonded web on the first conveyor device and the laying down on the second conveyor device.
  • the spunbonded nonwoven can be deposited on the second conveyor device preferably before washing, particularly preferably immediately before washing. A reduction in the conveying speed of the spunbonded nonwoven therefore takes place before washing or immediately before washing.
  • “immediately before washing” is understood to mean that no further treatment steps for the spunbonded web are provided on the second conveyor device before washing.
  • the spunbond can preferably run through the entire laundry on the second conveyor device.
  • the spunbonded nonwoven can pass through further treatment steps on a third conveyor device at a higher conveying speed than the second conveyor device.
  • the spunbond can be deposited on the third conveying device, whereby - as described above - the excess length of the spunbond or any loops formed therein can be untangled again, and the spunbond can again be treated at a higher conveying speed.
  • the third conveying device preferably has essentially the same conveying speed as the first conveying device.
  • the conveying speed of the third conveying device is increased again by a factor between 1 and 1000 compared to the second conveying device, a particularly versatile method can be provided which allows direct further processing of the spunbonded nonwoven after washing at a higher conveying speed.
  • the spunbonded nonwoven can preferably be accelerated again to the same conveying speed as it was before washing, and further treatment steps can be carried out.
  • the conveying speed of the third conveying device is preferably increased by a factor between 1 and 100, particularly preferably by a factor between 1 and 25, compared with the second conveying device.
  • the advantages mentioned above can be achieved particularly if the spunbonded nonwoven is subjected to hydroentanglement and / or drying after washing.
  • the hydroentanglement can in this case preferably be carried out at the original conveying speed of the spunbonded nonwoven, since this does not depend on longer dwell times compared to laundry.
  • the provision of hydroentanglement after washing allows a particularly reliable control of the structural and internal properties of the spunbonded nonwoven.
  • a permanent embossing of patterns or perforations which remain in the finished spunbonded nonwoven, can take place.
  • the spunbonded nonwoven can be dried in order to obtain a finished spunbonded nonwoven.
  • the finished spunbonded nonwoven can then optionally be wound up into rolls in a winding device.
  • the efficiency of the laundry can be further improved if the laundry is a multi-stage countercurrent wash.
  • the washing liquid used for washing in particular water, circulates in several washing stages, with fresh washing liquid being supplied at the end of the washing and discharged via the perforated second conveyor device and being gradually carried on in the same way to the upstream washing stages, and at the beginning the used washing liquid is discharged from the laundry.
  • the throughput of the method can be further increased if the spinning mass is also extruded into filaments through at least a first spinneret and a second spinneret, the filaments of the first spinneret being deposited on the first conveyor to form a first spunbonded web and the filaments of the second spinneret to form a second spunbond on the first conveyor, the filaments of the second spinning nozzle for forming the second spunbond are deposited over the first spunbond on the first conveyor to obtain a multi-layer spunbond.
  • the throughput of the process can be increased in a simple manner, since at least two spinning nozzles for the simultaneous formation of at least two Spunbonded nonwovens are provided, but the multilayered spunbonded nonwoven formed in the process can be processed further with the means available instead of a single spunbonded nonwoven.
  • the second spinneret is preferably located downstream of the first spinneret in the conveying direction of the first conveying device.
  • 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, however, the first and second spunbonded nonwovens can be separated again into these essentially without structural damage.
  • 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 nozzles and the filaments are each stretched in the direction of extrusion, the filaments of the third spinning nozzle being placed over the second spunbonded web on the first conveying device to form a third spunbonded web or the filaments of the further spinning nozzles for the formation of further spunbonded nonwovens are deposited on the first conveying device over the respective preceding spunbonded nonwoven in order to obtain the multilayered spunbonded nonwoven.
  • Such a multi-layer spunbonded nonwoven can have a large number of spunbonded nonwovens, which can be separated from one another again in a later process step.
  • the aforementioned advantages of the method can be particularly noticeable when the multi-layer spunbonded nonwoven is subjected to 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 the laundry according to the invention on the second conveying device with a conveying speed that is reduced compared to the first conveying device.
  • the method according to the invention can be characterized by high flexibility if the spunbonded nonwoven is a multi-layer spunbonded nonwoven, with at least two spinning nozzles arranged one behind the other, so that the filaments extruded from the respective spinning nozzles each form a spunbonded nonwoven layer, which are placed on top of one another the multi-layer spunbond is produced.
  • the multi-layer spunbond can then anyway can be reliably washed using the method according to the invention with reduced conveying speed.
  • the reliability of the method can be further increased if the filaments are drawn by means of a drawing air stream after they have been extruded from the spinneret.
  • the extrusion and drawing conditions of the filaments can be controlled in a targeted manner and the internal properties of the spunbonded nonwoven can be adapted.
  • 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 can be 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.
  • Such a direct solvent for cellulose is a solvent in which the cellulose is present 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 results in numerous improvements and advantages with regard to the economy of the production plant, operation of the plant and product quality. Since several loops offset in parallel one above the other can be washed at the same time, the conveying speed of the spunbonded nonwoven can be significantly reduced during the wash. The lower conveyor speed reduces both the costs and the complexity of the production system.
  • 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 advantages according to the invention can be particularly noticeable when the weight per unit area of the spunbonded nonwoven is between 5 g / m 2 (gsm) and 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 .
  • the conveying speed of the spunbonded nonwoven when it is deposited, or the conveying speed of the first conveyor device can preferably be between 1 m / min and 2000 m / min, preferably 10 m / min to 1000 m / min, particularly preferably 15 m / min to 500 m / min .
  • the internal structure of the spunbond can also be reliably controlled if the filaments extruded and drawn from the spinneret are partially coagulated.
  • the spinneret can be assigned a coagulation air stream containing a coagulation liquid for at least partial coagulation of the filaments, whereby the internal structure of the spunbond can be controlled in a targeted manner.
  • 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.
  • spinnerets of the method according to the invention or the device according to the invention single-row slot nozzles, multi-row needle nozzles or preferably column nozzles with lengths of 0.1 m to 6 m are used.
  • FIG. 1 shows a schematic representation of the method and a device according to a first embodiment.
  • a spinning mass 2 is produced from a cellulosic raw material and fed to a spinneret 3 of the device 200.
  • the cellulosic raw material for producing the spinning mass 2 which 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 spinning mass 2 being between 3% by weight and 17% by weight.
  • the spinning mass 2 is then extruded into the filaments 5 in the spinneret 3 through a multiplicity of nozzle holes 4.
  • the filaments 5 are stretched by means of a stretching air stream as they exit from the spinneret 3.
  • the stretching air 6 can emerge from openings in the spinneret 3 between the nozzle holes 4 and be directed as a stretching air stream directly onto the extruded filaments 5, which is not shown in detail in the figures.
  • the extruded filaments 5 are acted upon by a coagulation air stream 7 which is generated by a coagulation device 8.
  • the coagulation air flow 7 generally has 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 spunbond 1 is deposited immediately in front of the laundry 10 on a second conveyor belt 13 as a second conveyor 13, which has a lower conveying speed than the first conveyor 9.
  • the conveying speed of the spunbonded nonwoven 1 within the laundry 10 is therefore reduced compared to the conveying speed of the spunbonded fleece 1 in front of the laundry 10, that is to say during the filaments 5 being deposited on the first conveyor belt 9.
  • the conveying speed is preferably reduced by a factor between 1 and 1000. In another embodiment, the factor is between 1 and 100, and in another embodiment between 1 and 25.
  • the spunbond 1 is placed in loops 14 on second conveyor belt 13 deposited.
  • the spunbond 1 laid in loops 14 is then subjected to laundry 10, in which it is essentially freed of solvent residues from the spinning mass 2.
  • the spunbonded nonwoven 1 is deposited on a third conveyor belt 15, which has a higher conveying speed than the second conveyor belt 13.
  • the third conveyor belt 15 preferably has the same conveying speed as the first conveyor belt 9, as a result of which the loops 14 are completely pulled out again.
  • the third conveyor belt 15 can also have a different conveying speed different from the first conveyor belt 9, which compared to the second conveyor belt 13 by a factor between 1 and 1000, preferably between 1 and 100, especially preferably between 1 and 25, is increased.
  • the spunbonded nonwoven 1 is subjected to a hydroentanglement 11, which can further adapt the internal structure of the spunbonded nonwoven 1.
  • additional perforation patterns, embossing patterns or the like can be introduced into the spunbonded nonwoven 1, but this was not shown in detail in the figures.
  • the spunbonded nonwoven 1 is subjected to a drying process 12 in order to obtain a finished spunbonded nonwoven 1, the method 100 being concluded by optional winding 16 and / or packaging.
  • the device 100 or the method 200 can have at least a first spinneret 3 and a second spinneret 30, the spinning mass 2 simultaneously flowing through the first spinneret 3 and the second spinneret 30 the filaments 5, 50 is extruded.
  • the filaments 5, 50 are each stretched and at least partially coagulated in the extrusion direction, the filaments 5 of the first spinning nozzle 3 being deposited on the conveyor belt 9 to form a first spunbond 1 and the filaments 50 of the second spinning nozzle 30 on the conveyor belt to form a second spunbond 9 can be stored.
  • the filaments 50 of the second spinning nozzle 30 are deposited over the first spunbond 1 on the conveyor belt 9 to form the second spunbonded nonwoven in order to obtain a multilayered spunbonded nonwoven, which is not shown in detail in the figures.
  • the first spunbonded web 1 and the second spunbonded web preferably run through the laundry 10 together in the form of the multilayered spunbonded web, the multilayered spunbonded web being deposited in loops 14 on the second conveyor belt 13 at a lower conveying speed than the first conveyor belt 9.
  • the multi-layer spunbond can then be separated again into at least the first spunbond 1 and the second spunbond in a step following the laundry 10, the first spunbond 1 and second spunbond after being separated further steps, such as the hydroentanglement 11 and / or the Drying 12, run through.
  • the first spunbonded nonwoven 1 and second spunbonded nonwoven can alternatively also pass through the hydroentanglement 11 together and be permanently connected to one another to form the multilayered spunbonded nonwoven.
  • first spunbonded nonwoven 1 and second spunbonded nonwoven can each have different internal properties, for example a different weight per unit area, and thus form a multi-layered spunbonded nonwoven with properties that vary in cross section.
  • the first conveyor device 9 is a conveyor drum and the second conveyor device 13 is a conveyor belt.
  • both the first conveyor 9 and the second conveyor 13 are a conveyor drum.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention se rapporte à un procédé (100) de production d'un non-tissé filé-lié (1). Une matière filable (2) est extrudée à travers les trous (4) de buse d'au moins une filière (3, 30) afin de former des filaments (5, 50), et les filaments (5, 50) sont étirés dans une direction d'extrusion et posés sur un premier dispositif de transport (9) pour former le non-tissé filé-lié (1), ledit non-tissé filé-lié (1) subissant au moins un processus de lavage (10). L'objectif de l'invention est d'augmenter le débit du procédé sans aucune perte de qualité. Cela est permis en ce que le non-tissé filé-lié (1) subit le processus de lavage (10) au moins en partie sur un second dispositif de transport (13) perforé avec une vitesse de transport plus lente que le premier dispositif de transport (9), le non-tissé filé-lié (1) étant pulvérisé avec un fluide de lavage dans le processus de lavage (10), et le fluide de lavage étant au moins partiellement évacué par le second dispositif de transport (13) perforé.
PCT/EP2020/085773 2019-12-17 2020-12-11 Procédé de production de non-tissé filé-lié WO2021122379A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1020227023947A KR20220111706A (ko) 2019-12-17 2020-12-11 스펀본디드 부직포의 제조 방법
CN202080087875.3A CN114787440B (zh) 2019-12-17 2020-12-11 用于制造纺粘型无纺织物的方法
JP2022537034A JP2023506903A (ja) 2019-12-17 2020-12-11 スパンボンド不織布の製造のための方法
BR112022011701A BR112022011701A2 (pt) 2019-12-17 2020-12-11 Processo para a produção de não tecido spunbonded
EP20821214.2A EP4077789A1 (fr) 2019-12-17 2020-12-11 Procédé de production de non-tissé filé-lié
US17/785,481 US20230020186A1 (en) 2019-12-17 2020-12-11 Method for producing a spunbond nonwoven

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19217037.1 2019-12-17
EP19217037 2019-12-17

Publications (1)

Publication Number Publication Date
WO2021122379A1 true WO2021122379A1 (fr) 2021-06-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/085773 WO2021122379A1 (fr) 2019-12-17 2020-12-11 Procédé de production de non-tissé filé-lié

Country Status (8)

Country Link
US (1) US20230020186A1 (fr)
EP (1) EP4077789A1 (fr)
JP (1) JP2023506903A (fr)
KR (1) KR20220111706A (fr)
CN (1) CN114787440B (fr)
BR (1) BR112022011701A2 (fr)
TW (1) TW202140884A (fr)
WO (1) WO2021122379A1 (fr)

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GB2114052A (en) 1981-12-24 1983-08-17 Freudenberg Carl Polypropylene spunbond fabric
US5080569A (en) 1990-08-29 1992-01-14 Chicopee Primary air system for a melt blown die apparatus
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US20230020186A1 (en) 2023-01-19
KR20220111706A (ko) 2022-08-09
JP2023506903A (ja) 2023-02-20
TW202140884A (zh) 2021-11-01
CN114787440B (zh) 2023-09-12
EP4077789A1 (fr) 2022-10-26
BR112022011701A2 (pt) 2022-09-06

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