EP4110982A1 - Verfahren und vorrichtung zur herstellung von spinnvlies - Google Patents
Verfahren und vorrichtung zur herstellung von spinnvliesInfo
- Publication number
- EP4110982A1 EP4110982A1 EP21706952.5A EP21706952A EP4110982A1 EP 4110982 A1 EP4110982 A1 EP 4110982A1 EP 21706952 A EP21706952 A EP 21706952A EP 4110982 A1 EP4110982 A1 EP 4110982A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydroentanglement
- water
- laundry
- filaments
- washing
- 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.)
- Withdrawn
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- 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
- 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
- D04H18/00—Needling machines
- D04H18/04—Needling machines with water jets
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/013—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
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
- D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
Definitions
- the invention relates to a method for the production of spunbonded fabric, in which a solvent-containing spinning mass is extruded through a plurality of nozzle holes of at least one spinneret to form filaments and the filaments are each stretched in the direction of extrusion, the filaments being deposited on a perforated conveyor to form a spunbonded fabric and then subjected to a wash to wash out the solvent from the filaments and to hydroentanglement.
- the invention further relates to a device for the production of spunbond, with at least one spinneret for extrusion of a spinning mass into filaments, with a stretching device assigned to the spinning nozzle for stretching the extruded filaments by means of a stretching air stream, with a perforated conveyor device for depositing the filaments and forming the spunbond, with a wash for washing the spunbonded nonwoven after its formation and with a hydroentanglement after the wash.
- spunbonded nonwovens or nonwovens on the one hand by the spunbond process and on the other hand by the meltblown process is known from the prior art.
- spunbond process for example GB 2 114 052 A or EP 3 088 585 A1
- the filaments are extruded through a nozzle and drawn off and stretched by a stretching unit below.
- meltblown process on the other hand (for example US Pat. No. 5,080,569 A, US Pat. No. 4,380,570 A or US Pat. No. 5,695,377 A), the extruded filaments are entrained and stretched by hot, fast process air as soon as they exit the nozzle.
- the filaments are placed on a storage surface, for example a perforated conveyor belt, in a random layer to form a nonwoven, transported to post-processing steps and finally wound up as nonwoven rolls.
- a disadvantage of hydroentanglement is the great expense in terms of equipment and maintenance for cleaning the water circuit, the filters and the nozzle bars, as shown in EP 2462 269 B1.
- Such systems suffer especially from high filtration costs.
- single-use bag filters are used, which have to be disposed of.
- Such systems likewise have the disadvantage of high water consumption, with drinking water usually being used for hydroentanglement and part of it being continuously disposed of as waste water in the sewer in order to keep the water quality constant in the circuit.
- the hydroentanglement takes place after the washing. Especially when starting up and shutting down the washing system, or in the event of disruptions in the process flow, such processes can lead to solvents with the nonwoven getting into the water cycle of the hydroentanglement during operation and thus being lost.
- the present invention has therefore set itself the task of providing a method for the production of spunbonded nonwoven of the type mentioned at the beginning, which enables an inexpensive and efficient production of hydroentangled spunbonded nonwoven.
- the invention achieves the stated problem in that fresh water is supplied to the hydroentanglement and the wastewater from the hydroentanglement is supplied to the laundry as washing water.
- the water consumption and the wastewater pollution caused by the hydroentanglement can also be reduced. Since the hydroentanglement takes place after the laundry, the wastewater from the hydroentanglement also has only minimal amounts of solvent and thus essentially does not impair the washing performance of the laundry.
- fresh water is understood to mean water which is essentially free from impurities, for example from solids, solvents, etc. is.
- the fresh water can be, for example, treated process water or conventional, unused fresh water.
- the method according to the invention enables, in particular, a minimization of the effort required to clean the jet strips of the hydroentanglement and thus an increase in productivity, since the downtimes during maintenance can be reduced.
- the process can produce a smaller amount of waste, since bag filtration can be dispensed with and no chemicals are required as filtration aids.
- the operational effort for the operating personnel as well as the complexity of the process can be significantly reduced without filtration.
- both the amount of waste water and the loss of solvent are reduced, since the fully demineralized fresh water first goes into the hydroentanglement and is then used as wash water for countercurrent washing.
- the amount of washing water required to operate a large-scale washing plant, in particular for the production of cellulosic spunbonded nonwoven, and the amount of fresh water required to operate the hydroentanglement are approximately the same. It has been shown that it is possible to supply the hydroentanglement with fully demineralized fresh water and to use the waste water from the hydroentanglement as washing water for the countercurrent washing system without additional washing water having to be added.
- the cellulosic spunbonded nonwoven produced with the process according to the invention can have very low calcium and magnesium concentrations when using deionized water for hydroentanglement (instead of tap or drinking water), which can further increase the reliability of the process.
- the laundry is also a multi-stage countercurrent wash and the wastewater from the hydroentanglement is conducted as wash water in countercurrent through the wash stages of the countercurrent wash, a particularly resource-saving and cost-effective process can be created, since a single supply is required for the entire process chain from the wash up to and including the hydroentanglement of fresh water to the hydroentanglement is sufficient, while all downstream washing stages are fed with the wastewater from the previous stage or hydroentanglement.
- hydroentanglement is designed at the same time as the last washing stage in the countercurrent washing. In this way, a method can be created that is inexpensive and at the same time technically easy to implement, since the laundry and the hydroentanglement do not have to be implemented as separate units.
- the reliability of the laundry can be further improved if the waste water from the hydroentanglement is degassed and the waste water from the hydroentanglement which has been degassed is supplied to the laundry as washing water. This is because the air introduced into the water during hydroentanglement can be reliably removed from the wastewater and the efficiency of the laundry can be improved. If the solvent-enriched wastewater from the laundry is fed to a water treatment facility, the environmental compatibility of the process can be further improved, since the fresh water used can be separated from the solvents again in a water treatment facility and treated.
- the cost efficiency of the process can also be further improved if solvents are recovered from the wastewater in the water treatment. A loss of solvent via the wastewater from the laundry can thus be prevented and the recovered solvent can be used again, for example, to dissolve cellulose.
- a further increase in cost efficiency can be achieved if purified water is recovered from the wastewater in the water treatment.
- the purified water obtained in this way can then at least partially be fed to the hydroentanglement as fresh water, whereby a cycle can be created between fresh water supply for hydroentanglement and waste water discharge from the laundry.
- the purified water recovered from the water treatment can be fully demineralized water.
- a technically simple and reliable method can be created if the spunbonded nonwoven is subjected to hydroentanglement on a second conveying device.
- the spunbonded nonwoven after being formed on the perforated first conveyor device, the spunbonded nonwoven can be deposited on the second conveyor device.
- the spunbond can also be subjected to washing on the second conveying device, namely before the spunbond is fed to the hydroentanglement.
- the second conveying device has an embossed structure with an embossed pattern and the spunbonded nonwoven is provided with the embossed pattern through the hydroentanglement on the second conveying device, a technically simple process can be created which at the same time solidifies the spunbonded fabric and introduces perforations and embossed patterns in the course the hydroentanglement enabled. In this way, spunbonded nonwovens can be produced for a large number of areas of application using the method according to the invention.
- a multi-layer spunbonded nonwoven with an embossed structure can also be created if the spinning mass is extruded into filaments through a plurality of nozzle holes of several spinnerets arranged one behind the other.
- the filaments are each drawn in the direction of extrusion by a drawing air stream stretched and finally the respective filaments of the multiple spinnerets for forming the multi-layer spunbonded web are deposited on the conveyor device one on top of the other.
- the throughput of the process can be increased, since several spunbonded webs can be formed simultaneously from several spinning nozzles.
- the multi-layer spunbonded nonwoven formed in this way can, however, be processed further together with the available means without the need for separate processing of the individual spunbonded nonwovens.
- the multi-layer spunbond can be formed from individual spunbond layers with different properties, so that a very versatile spunbond can be created.
- the individual spunbonded nonwovens can have different weights per unit area, different air permeabilities, different filament diameters, etc.
- the multi-layer spunbonded nonwoven can then be consolidated in the hydroentanglement process, or it can also be perforated or provided with an embossed pattern.
- the pressure for the fresh water in the hydroentanglement process can be between 0 bar and 500 bar, preferably between 10 bar and 250 bar, particularly preferably between 20 bar and 200 bar.
- the volume flow of the fresh water in the hydroentanglement can be between 0.1 m 3 / h and 500 m 3 / h, preferably between 10 m 3 / h and 250 m 3 / h, particularly preferably between 20 m 3 / h and 150 m 3 / h.
- 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
- certain ionic liquids or mixtures thereof 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 cellulose throughput per spunbond nozzle can be 5 kg / h per m nozzle length to 500 kg / h per m nozzle length.
- 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 having 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 can be a mixture of deionized water and 0% by weight to 40% by weight NMMO, preferably 10% by weight to 30% by weight NMMO, particularly preferred 15 wt% to 25 wt% NMMO. A particularly reliable coagulation of the extruded filaments can be achieved.
- the invention has also set itself the task of improving a device for producing spunbonded nonwoven according to the type mentioned at the outset in such a way that it enables a reduction in water consumption in laundry and hydroentanglement in a structurally simple and cost-effective manner.
- the invention solves the problem in that the outlet of the
- Hydroentanglement is fluidly connected to the laundry inlet.
- the outlet of the hydroentanglement is flow-connected to the inlet of the laundry, then the wastewater from the hydroentanglement can be reused in the laundry in a particularly simple manner, whereby the water consumption is minimized.
- flow-connected is understood to mean the existence of a connection to enable, in particular a continuous, flow of fluids between outlets and / or inlets.
- the present invention also provides a device which reduces the mechanical and plant engineering effort in the planning, construction and operation of a plant for the production of hydroentangled, in particular cellulosic, spunbonded nonwovens.
- the outlay on equipment and thus the construction costs of the device can be further reduced if the hydroentanglement is carried out as part of the laundry.
- this can prove to be particularly advantageous when the laundry is a countercurrent wash with several washing stages and the hydroentanglement is designed at the same time as the last washing stage in the laundry.
- the respective outlet of a washing stage or the hydroentanglement is flow-connected to the inlet of the upstream washing stage, so that fresh water is only supplied to the hydroentangling and the wastewater is discharged from the first washing stage.
- a degassing device for degassing the wastewater and / or a filter for removing solids from the wastewater of the hydroentangling process can also be provided between the laundry inlet fluidly connected to the outlet of the hydroentanglement or an upstream washing stage.
- the operating costs of the device according to the invention can be reduced further if the outlet of the laundry is flow-connected to a water treatment system for the recovery of solvent and fresh water from the waste water of the laundry. In this way, the used washing water discharged from the laundry outlet or the first washing stage can be fed back to a water treatment system, from which solvent and fresh water can in turn be recovered.
- the hydroentanglement according to the invention can have at least one high pressure pump for fully demineralized water, at least one hydroentanglement nozzle bar which is flow-connected to the high pressure pump, at least one suction device flow-connected to the outlet under the hydroentanglement nozzle bar, and at least one degassing device between the suction device and the outlet.
- the degassing device can, for example, be an air / water separator in order to separate the water collected in the suction device from entrained air.
- the suction device can for example be connected to a vacuum blower in order to generate the vacuum required for the suction device.
- the suction device can be designed as a suction pipe under the nozzle bar of the hydroentanglement.
- the device can have a second conveying device for the spunbonded web, which is provided between the nozzle bar of the hydroentanglement and the suction device.
- the second conveying device can in particular have an embossed structure with an embossed pattern, the spunbonded nonwoven being provided with the embossed pattern during the hydroentanglement.
- FIG. 1 shows a schematic representation of the method according to the invention or the device according to the invention according to a first embodiment variant
- FIG. 3 shows a schematic representation of the method according to the invention or the device according to the invention according to a third embodiment variant
- FIG. 4 shows a schematic illustration of the method according to the invention or the device according to the invention according to a fourth embodiment variant
- FIG. 5 shows a schematic illustration of the method according to the invention or the device according to the invention according to a fifth embodiment variant.
- a spinning mass 2 is produced from a cellulosic raw material and attached to a spinneret 3 supplied to 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 cellulose pulp suitable for the production of lyocell fibers from wood or other vegetable raw materials.
- the cellulosic raw material consists at least in part of production waste from the production of spunbonded nonwovens or recycled textiles.
- the spinning mass 2 is a solution of cellulose in NMMO and water, the cellulose content in the spinning mass being between 3% by weight and 17% by weight.
- the spinning mass 2 is then extruded in a next step through a multiplicity of nozzle holes in the spinning nozzle 3 to form filaments 4.
- the extruded filaments 4 are then accelerated and drawn by a drawing air stream.
- a stretching device 6 is provided in the spinneret 3, to which stretching air 5 is fed and which ensures that the stretching air stream exits from the spinneret 3 in order to accelerate the filaments 4 after their extrusion.
- the stretching air stream can emerge between the nozzle holes of the spinneret 3.
- the stretching air stream can alternatively emerge hemming around the nozzle holes.
- Such spinnerets 3 with stretching devices 6 for generating a stretching air stream are known from the prior art (US Pat. No. 3,825,380 A, US 4,380,570 A, WO 2019/068764 A1).
- the extruded and drawn filaments 4 are also acted upon by a coagulation air stream 7, which is provided by a coagulation device 8.
- the coagulation air flow 7 usually has a coagulation liquid, for example in the form of steam, mist, etc.
- the drawn and at least partially coagulated filaments 4 are then placed in a random position on the conveyor 9 and form the spunbonded web 1 there. After the spunbonded web 1 has been formed, it is subjected to washing 10 and hydroentanglement 11.
- the hydroentanglement 11 is supplied with fully demineralized fresh water 12, which is sprayed onto the spunbond 1 under high pressure, thereby solidifying it.
- the wastewater 13 from the hydroentanglement 11 is fed to the laundry 10 as washing water 14. Since the laundry 10 is upstream of the hydroentanglement 11, the waste water 13 from the hydroentanglement 11 is only slightly contaminated with solvent and can therefore be used as washing water 14 for the purposes of the laundry 10 without any problems.
- the wastewater 13 is fed to the laundry 10 as washing water 14, the wastewater 13 is passed through a degassing device 15 in order to remove air that has entered the wastewater 13 in particular.
- the waste water 16 from the laundry 10 is finally discharged and can be fed to a water treatment system 17 for the recovery of purified water or of solvent.
- the purified water can then be fed back as fresh water 12 to the hydroentanglement 11, although this is not shown in more detail in the figures.
- Recovered solvent can in particular be used for the renewed production of spinning mass 2 from cellulosic raw material, which is also not shown in detail in the figures.
- the wastewater 16 of the laundry can at least partially also be fed to the coagulation device 8 as coagulation liquid.
- the washed and hydroentangled spunbonded nonwoven 1 is then subjected in a next step to drying in a dryer 18 in order to remove the remaining moisture and to obtain a finished spunbonded nonwoven 1. Finally, the method 200 is completed by optional winding 19 and / or packaging of the finished spunbonded nonwoven 1.
- FIG. 2 shows a detailed schematic representation of the laundry 10 and hydroentanglement 11 in a method 101 or a device 201 according to a second embodiment of the invention.
- the wastewater 13 is removed via suction pipes 24 as a suction device through the conveyor belt 22 and through the conveyor drum 23.
- the spunbonded nonwoven 1 is then dewatered again on the dewatering belt 25 before it is transported on to the dryer 18, which was not shown in detail.
- the wastewater 13 of the hydroentanglement 11, which is obtained from the suction pipes 24, contains a water / air mixture and is fed to the degassing device 26 in order to remove the air.
- the exhaust air 28 is removed from the wastewater 13 by means of a vacuum pump 27, while the gas-free wastewater is collected in the storage container 29.
- the waste water is then fed from the storage container 29 to the laundry 10 as washing water 14.
- the laundry 10 is, as can be seen in FIG. 2, as a countercurrent laundry 10 two washing stages 30, 31 carried out, wherein the washing water 14 of the second washing stage 31, which is downstream of the first washing stage 30, is fed.
- the waste water 32 from the second washing stage 31 is then fed to the first washing stage 30 as washing water 33.
- the wastewater 34 from the first washing stage, which is enriched with solvent from the spunbonded nonwoven 1, is then discharged from the laundry 10 as wastewater 16 or, as shown in FIG. 1, fed to a water treatment system 17.
- the fully demineralized fresh water 12 thus accumulates on its way through the hydroentanglement 11 and through the laundry 10 with solvent from the spunbond 1 and is finally fed to the water treatment 17 in order to recover solvent and fully demineralized fresh water from the wastewater 16.
- FIG. 3 shows a detailed schematic representation of the laundry 10 and hydroentanglement 11 in a method 102 or a device 202 according to a third embodiment variant of the invention.
- the embodiment variant in FIG. 3 differs from that in FIG. 2 only in that the spunbond 1 is subjected to the laundry 10 and the hydroentanglement 11 in each case on a common second conveyor belt 35. As a result, the outlay in terms of mechanical engineering and apparatus for the device 202 can be further reduced.
- FIG. 4 shows a further detailed schematic representation of the laundry 10 and hydroentanglement 11 in a method 103 and a device 203 according to a further embodiment of the invention.
- the conveyor drum 23 and the dewatering belt 25 in the hydroentanglement 11 have been dispensed with.
- the hydroentanglement 11 therefore takes place exclusively on the conveyor belt 35 shared with the laundry 10.
- the hydroentanglement 11 is preferably designed as the last stage of the multistage countercurrent washing 10, whereby the mechanical engineering and equipment expenditure can be further reduced.
- the conveyor belt 35 has a three-dimensional embossed structure 36.
- the embossing pattern of the embossing structure 36 is then transferred in the hydroentanglement 11 to the spunbond 1, which after the hydroentanglement 11 has the embossed pattern. All other features remain as described in accordance with FIGS. 2, 3 and 4.
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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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20159097 | 2020-02-24 | ||
| PCT/EP2021/054496 WO2021170608A1 (de) | 2020-02-24 | 2021-02-24 | Verfahren und vorrichtung zur herstellung von spinnvlies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4110982A1 true EP4110982A1 (de) | 2023-01-04 |
Family
ID=69726505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21706952.5A Withdrawn EP4110982A1 (de) | 2020-02-24 | 2021-02-24 | Verfahren und vorrichtung zur herstellung von spinnvlies |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230128204A1 (de) |
| EP (1) | EP4110982A1 (de) |
| CN (1) | CN115103936A (de) |
| TW (1) | TW202136602A (de) |
| WO (1) | WO2021170608A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022114789A1 (de) | 2022-06-13 | 2023-12-14 | Carl Freudenberg Kg | Gasdiffusionslage aus wasserstrahlverfestigten Vliesstoffen |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3825380A (en) | 1972-07-07 | 1974-07-23 | Exxon Research Engineering Co | Melt-blowing die for producing nonwoven mats |
| US4380570A (en) | 1980-04-08 | 1983-04-19 | Schwarz Eckhard C A | Apparatus and process for melt-blowing a fiberforming thermoplastic polymer and product produced thereby |
| DE3151294C2 (de) | 1981-12-24 | 1986-01-23 | Fa. Carl Freudenberg, 6940 Weinheim | Polypropylen-Spinnvliesstoff mit niedrigem Fallkoeffizienten |
| US5080569A (en) | 1990-08-29 | 1992-01-14 | Chicopee | Primary air system for a melt blown die apparatus |
| US6306334B1 (en) | 1996-08-23 | 2001-10-23 | The Weyerhaeuser Company | Process for melt blowing continuous lyocell fibers |
| US5695377A (en) | 1996-10-29 | 1997-12-09 | Kimberly-Clark Worldwide, Inc. | Nonwoven fabrics having improved fiber twisting and crimping |
| GB9625634D0 (en) | 1996-12-10 | 1997-01-29 | Courtaulds Fibres Holdings Ltd | Method of manufacture of nonwoven fabric |
| AT503625B1 (de) | 2006-04-28 | 2013-10-15 | Chemiefaser Lenzing Ag | Wasserstrahlverfestigtes produkt enthaltend cellulosische fasern |
| DE102006033071A1 (de) | 2006-07-14 | 2008-01-17 | Fleissner Gmbh | Vorrichtung zur Herstellung von Textilien, Vliesstoffen, Spinnvliesen, Papierwerkstoffen |
| US8191214B2 (en) * | 2008-12-31 | 2012-06-05 | Weyerhaeuser Nr Company | Method for making lyocell web product |
| DE102009036296A1 (de) | 2009-08-06 | 2011-02-10 | Fleissner Gmbh | Versorgungseinrichtung zum Betreiben einer Wasserstrahlvernadelungsanlage |
| TWI392781B (zh) | 2009-12-31 | 2013-04-11 | Preparation of Natural Cellulose Nonwoven by Wet Spunbond Method | |
| US9394637B2 (en) | 2012-12-13 | 2016-07-19 | Jacob Holm & Sons Ag | Method for production of a hydroentangled airlaid web and products obtained therefrom |
| TWI641734B (zh) * | 2015-01-26 | 2018-11-21 | 聚泰環保材料科技股份有限公司 | Method for preparing bamboo pulp cellulose non-woven fabric with deodorizing function by spunbonding method |
| EP3088585B1 (de) | 2015-04-27 | 2017-06-21 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Verfahren und vorrichtung zur herstellung eines spinnvlieses aus filamenten und spinnvlies |
| EP3507408B1 (de) * | 2016-09-01 | 2021-02-24 | Essity Hygiene And Health Aktiebolag | Verfahren zur herstellung von vlies |
| 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 |
| EP3385427A1 (de) * | 2017-04-03 | 2018-10-10 | Lenzing Aktiengesellschaft | Cellulosefaservliesstoff mit faserdurchmesserverteilung |
| WO2018184046A1 (en) * | 2017-04-03 | 2018-10-11 | Lenzing Ag | A nonwoven material designed for use as filter media |
| BR112020004144B1 (pt) | 2017-10-06 | 2023-10-10 | Lenzing Aktiengesellschaft | Dispositivo para a extrusão de filamentos, emprego de um dispositivo para a extrusão de filamentos e processo para produção de dispositivo para a extrusão de filamentos |
-
2021
- 2021-02-22 TW TW110106088A patent/TW202136602A/zh unknown
- 2021-02-24 US US17/801,603 patent/US20230128204A1/en not_active Abandoned
- 2021-02-24 CN CN202180016499.3A patent/CN115103936A/zh active Pending
- 2021-02-24 WO PCT/EP2021/054496 patent/WO2021170608A1/de not_active Ceased
- 2021-02-24 EP EP21706952.5A patent/EP4110982A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021170608A1 (de) | 2021-09-02 |
| US20230128204A1 (en) | 2023-04-27 |
| CN115103936A (zh) | 2022-09-23 |
| TW202136602A (zh) | 2021-10-01 |
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