EP4110978A1 - Verfahren zur herstellung von spinnvlies - Google Patents
Verfahren zur herstellung von spinnvliesInfo
- Publication number
- EP4110978A1 EP4110978A1 EP21706601.8A EP21706601A EP4110978A1 EP 4110978 A1 EP4110978 A1 EP 4110978A1 EP 21706601 A EP21706601 A EP 21706601A EP 4110978 A1 EP4110978 A1 EP 4110978A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filaments
- embossed
- spunbonded nonwoven
- spunbond
- embossed pattern
- 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.)
- Granted
Links
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- 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
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/52—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment combined with mechanical treatment
- D06M13/525—Embossing; Calendering; Pressing
-
- 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 process for the production of spunbonded nonwoven with an embossed pattern, in which a 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 extrusion direction by a stretching air stream, the filaments to form a spunbonded nonwoven a perforated tray of a conveyor.
- 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 114052 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.
- Lyocell spunbond The hydroentanglement of Lyocell spunbond is described, for example, in EIS 8,282,877 B2. Since Lyocell spunbonded nonwovens are endless filaments, three-dimensional structures cannot be imprinted by energy-saving suspension, as in the paper industry. The moist and heavy filaments are too strongly interlinked for this. A hydroentanglement can only take place with high energy input to structure the crosslinked cellulose filaments, which has a negative effect on the energy costs of a plant for the production of cellulosic spunbonded nonwoven.
- the invention has therefore set itself the task of providing a method for producing spunbonded nonwoven of the type mentioned at the beginning, which enables an efficient, technically simple and thus inexpensive introduction of an embossed pattern into the spunbonded nonwoven.
- the invention solves the problem in that the perforated shelf has an embossed structure with an embossed pattern, the filaments are pressed into the embossed structure by the stretching air stream and the spunbonded nonwoven formed is provided with the embossed pattern.
- the method according to the invention thus enables, in particular, the direct structuring of a cellulosic spunbonded nonwoven with the aid of three-dimensional embossed structures.
- the embossed structures can have any embossed pattern.
- the perforated tray of the conveying device provided with the embossed structure can in particular be designed as an integral part of the conveying device.
- conveyor belts, rotating drums or comparable devices can be suitable as the conveying device.
- a suction device can be provided below the perforated shelf, which applies a negative pressure to the perforated shelf in order to efficiently discharge the stretching air flow through the shelf.
- the reliability of the method can thus be further increased, since the formation of undesired turbulence in the area of the deposit can be avoided.
- the reliability and quality of the embossing process can be influenced by numerous parameters. For example, by increasing or reducing the stretching air pressure, by increasing or reducing the negative pressure under the shelf and by changing the embossed structure in the shelf, for example by changing the depth of the embossed structure, it is possible to control how deep the embossed pattern of the embossed structure is provided in the spunbonded nonwoven .
- the spunbonded nonwoven can, for example, have a significantly greater perceptible thickness than a spunbonded nonwoven with an identical surface weight without an embossed pattern.
- perforations are provided in the tray which serve to discharge gases and / or liquids through the tray and are to be separated from the embossed structures which serve to introduce the embossed pattern into the spunbonded nonwoven.
- the perforations or the perforated tray itself therefore essentially does not lead to the formation of an embossed pattern in the spunbonded nonwoven.
- a reliable introduction of the embossed pattern into the spunbonded nonwoven can be achieved if the height of the embossed structures, i.e. the height difference between projections and depressions in the embossed structure, is greater than or equal to 0.1 mm.
- the height of the embossed structures is at least 0.5 mm, particularly preferably at least 1 mm.
- it can have an advantageous effect on the reliability of the introduction of the embossed pattern if the height of the embossed structures is less than or equal to 10 mm, in preferred embodiments of the invention less than or equal to 5 mm, or particularly preferably less than or equal to 3 mm.
- the spunbonded nonwoven is subjected to at least one treatment step after formation, the embossed pattern in the spunbonded nonwoven being essentially retained after the at least one treatment step, the reliability and simplicity of the method can be further improved.
- a treatment step can be, for example, washing or drying, the spunbonded nonwoven with the embossed pattern being subjected to washing and then drying. This is because solvent residues can be reliably removed from the spunbonded nonwoven by washing, thus creating a permanently stable and solvent-free spunbonded nonwoven.
- the wash can preferably be designed as a countercurrent wash.
- the spunbonded nonwoven provided with the embossed pattern also passes through a hydroentanglement after formation, the spunbonded nonwoven being provided with a second embossed pattern in the hydroentangled process, complex embossed patterns can be introduced into the spunbonded nonwoven in a technically simple manner, for example by superimposing two or more embossed patterns .
- the spunbonded nonwoven is provided with a second embossing pattern on a second side by the hydroentanglement.
- the introduction of the second embossed pattern into the spunbond can in any case be done in such a way that the first embossed pattern, which was provided by pressing the filaments into the embossed structure of the deposit in the spunbond, remains essentially unchanged during hydroentanglement.
- a method for producing multi-layer spunbonded nonwovens in which the spinning mass is extruded into filaments through a plurality of nozzle holes of several spinnerets arranged one behind the other and the filaments are each stretched in the extrusion direction by a stretching air stream, the respective filaments of the Spinning nozzles are placed on top of each other on the perforated shelf to form a multi-layer spunbond.
- the multi-layer spunbonded nonwoven created in this way can be reliably provided with the embossed pattern as described above and additionally have a desired multilayered structure (for example by superimposing spunbonded nonwovens with different properties).
- the embossed pattern can then be formed either through all the spunbonded nonwoven layers, through some of the spunbonded nonwoven layers or only in a first spunbonded nonwoven layer.
- the method according to the invention can be used particularly advantageously for the production of spunbonded nonwovens from Lyocell spinning mass.
- the spunbonded nonwoven produced in this way is then a cellulosic spunbonded nonwoven, the lyocell spinning mass being a solution of cellulose in a direct solvent, in particular a tertiary amine oxide in aqueous solution.
- the direct solvent can be a tertiary amine oxide, preferably N-methylmorpholine-N-oxide (NMMO) in aqueous solution or an ionic liquid in which cellulose can be dissolved without chemical derivatization.
- NMMO N-methylmorpholine-N-oxide
- the cellulose content in the spinning mass can be between 4% and 17%, preferably between 5% and 15%, particularly preferably between 6% and 14%.
- the throughput of cellulose per spunbond nozzle can be between 5 kg / h per m nozzle length and 500 kg / h per m nozzle length.
- the drawing air stream can also have a temperature between 20 ° C and 200 ° C, preferably between 60 ° C and 160 ° C, particularly preferably between 80 ° C and 140 ° C.
- the stretching air pressure i.e. the air pressure of the stretching air stream when exiting the stretching air nozzles, can be between 0.05 bar and 5 bar, preferably between 0.1 bar and 3 bar, particularly preferably between 0.2 bar and 1 bar.
- the required amount of stretching air can be between 20 Nm 3 (standard cubic meters) and 900 Nm 3 per kg of cellulose.
- the required amount of drawing air can preferably be between 40 Nm 3 and 500 Nm 3 per kg of cellulose, particularly preferably between 60 Nm 3 and 300 Nm 3 per kg of cellulose
- the internal structure of the spunbonded nonwovens can also be reliably controlled if the filaments extruded from the spinneret are at least partially coagulated.
- the filaments can preferably be acted upon by a coagulation air stream which has a coagulation liquid.
- 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 providing a device for producing spunbonded nonwoven according to the preamble of claim 8, which enables a reliable and technically simple introduction of an embossed pattern into the spunbonded nonwoven.
- the invention solves the problem posed by the features of the characterizing part of claim 8.
- the perforated shelf has an embossed structure with an embossed pattern
- a technically and structurally simple device can be created which allows a reliable embossing of a spunbonded nonwoven with an embossed pattern.
- the filaments will first extruded through the spinnerets and then stretched by the stretching air stream in the stretching device.
- the drawn and accelerated filaments can then impinge directly on the tray with the embossed structure.
- the direction of flow of the stretching air stream is aligned in such a way that the extruded and stretched filaments are pressed into the embossed structure of the tray and the spunbonded nonwoven is provided with the embossed pattern of the embossed structure.
- the present invention thus provides a device which enables the direct structuring of a spunbonded nonwoven, i.e. the introduction of an embossed pattern into it, and an associated change in the three-dimensional structure, the look, the feel and the softness of the spunbonded nonwoven. Above all, this without the device having to have further means, such as hydroentanglement, in which the spunbonded nonwoven is provided with a corresponding embossed pattern.
- hydroentanglement By dispensing with hydroentanglement, on the one hand the investment costs for a large-scale spunbond system and, on the other hand, the ongoing production costs of the spunbonded fabrics can be reduced, since the electricity and water consumption associated with hydroentanglement can also be dispensed with.
- the profitability of a plant for the production of spunbonded nonwoven with embossed patterns is thus improved.
- the investment costs and the operating costs with regard to hydroentanglement can either be completely eliminated or significantly reduced. If such a hydroentanglement is to follow for further consolidation of the web formation, the operating costs can be reduced significantly, since such hydroentanglement can be operated with significantly lower power.
- the device has a laundry for washing the spunbonded web after it has been formed and a dryer for drying the spunbonded web after washing.
- the device also has a suction device under the perforated shelf for removing the stretching air stream, the pressing of the filaments into the embossed structure of the shelf can be further improved and thus the reliability of the device can be further increased. This is particularly the case when the drawing air stream is further sucked through the perforated tray.
- the conveyor belt having a second embossed structure with a second embossed pattern
- a combination of the direct structuring of the spunbonded fabric according to the invention on the shelf and an additional direct structuring of the spunbonded nonwoven in the hydroentangled process can be carried out in a technically simple manner and thus the Production of spunbonded nonwovens with complex multilayer embossed patterns are made possible.
- FIG. 1 shows a schematic representation of the method according to the invention according to a first embodiment variant
- FIG. 2 shows a schematic representation of the method according to the invention according to a second embodiment variant
- FIG. 3 shows a schematic detailed view of the extrusion, drawing and depositing of the filaments according to the method shown in FIG. 1.
- 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 the production of the spinning mass 2 which production is not shown in detail in the figures, can be a pulp suitable for the production of lyocell fibers from wood or other vegetable raw materials. However, it is also conceivable that the cellulosic raw material consists of or contains 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 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.
- 3 shows a detailed schematic representation of the process sequence.
- the extruded filaments 4 are then accelerated and drawn in a drawing air stream 5.
- a stretching device 6 is provided in the spinneret 3, which ensures that the stretching air stream 5 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 exit around the nozzle holes. However, this is not shown in more detail in the figures.
- Such spinnerets 3 with stretching devices 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 11, which is provided by a coagulation device 12.
- the coagulation air flow 11 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 deposited in a random position on the tray 7 of a conveyor device 8.
- the tray 7 of the conveyor device 8 has an embossed structure 9 with an embossed pattern 10.
- the extruded and drawn filaments 4 are then pressed into the tray 7 by means of the drawing air stream 5 and form the spunbonded web 1 there.
- the spunbonded web 1 After the spunbonded web 1 has been formed, it has the embossed pattern 10 from the embossed structure 9.
- the embossed pattern 10 or the three-dimensional structure of the spunbond 1 can thus be embossed according to the invention by the embossed structure 9 in the tray 7 and the directly structured cellulosic spunbond 1 according to the invention can be produced without additional downstream process steps.
- the device 200 according to the invention or the method 100 can in particular dispense with hydroentanglement, as a result of which the length, the investment costs and the operating costs of the device 200 can advantageously be reduced.
- the spunbond 1 is guided over the conveyor belt 13 through a laundry 14 in which the spunbond 1 is washed in order to free it from residues of the solvent, namely the NMMO contained in the spinning mass 2.
- the washing 14 is a multi-stage countercurrent washing, which, however, was not shown in the figures.
- the washed spunbonded nonwoven 1 is then subjected to drying in a dryer 15 in order to remove the remaining moisture and to obtain a finished spunbonded nonwoven 1.
- the method 200 is completed by optional winding 16 and / or packaging of the finished spunbonded nonwoven 1.
- FIGS. 1 and 3 show a method 101 according to the invention and a device 201 according to a second embodiment variant of the invention.
- the formation of the spunbonded nonwoven 1 including extrusion, stretching, coagulation and deposition on the deposition 7 having the embossed structure 9 takes place identically as described above for the first embodiment variant with reference to FIGS. 1 and 3.
- the spunbonded nonwoven 1 is deposited on a further conveyor belt 18 after washing 14, the conveyor belt 18 having a second embossed structure 19 with a second embossed pattern 20.
- the spunbond 1, which already has the embossed pattern 10 is then hydroentangled over the conveyor belt 18, that is, sprayed with water under high pressure, whereby the spunbond 1 into the second embossed structure 19 of the conveyor belt
- 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 4, 40 is extruded.
- the filaments 4, 40 are each stretched and at least partially coagulated in the extrusion direction by means of a stretching air stream 5, 50, the filaments 4 of the first spinning nozzle 3 being deposited on the conveying device 8 to form a first spunbond 1 and the filaments 40 of the second spinning nozzle 30 be deposited on the conveyor 8 to form a second spunbonded web.
- the filaments 40 of the second spinning nozzle 30 are deposited on the first spunbond 1 on the conveyor 8 to form the second spunbonded nonwoven in order to obtain a multi-layer spunbonded nonwoven, which is not shown in the figures.
- inventive Multi-layer spunbond can, surprisingly, also reproduce the embossed pattern 10, which was introduced into the first spunbond 1 through the support 7, through the entire multi-layer spunbond.
- the first spunbonded nonwoven 1 and the second spunbonded nonwoven preferably pass through the laundry 14 and the dryer 15 together in the form of the multilayered spunbonded nonwoven.
- the multi-layer spunbond can be separated again in a further step, in particular after washing 14, into at least the first spunbond 1 and second spunbond, the first spunbond 1 and second spunbond after the separation, further steps, such as the hydroentanglement 17 and / or the drying 15, can be carried out separately.
- first spunbonded nonwoven 1 and second spunbonded nonwoven can alternatively also pass through the hydroentanglement 17 together and be permanently connected to one another to form the multi-layered spunbonded nonwoven.
- the multi-layer spunbonded nonwoven can be fed to an optional winding 16.
- first spunbonded nonwoven 1 and the second spunbonded nonwoven can each have different internal properties, for example a different weight per unit area, or different air permeability and thus form a multi-layer spunbonded nonwoven with properties that vary in cross section.
- cellulosic spunbonded nonwovens were produced from a Lyocell spinning mass, a solution of cellulose in a mixture of water and NMMO being used as the spinning mass.
- the cellulose throughput per spinneret was 300 kg / h / m in all examples.
- the drawing air pressure of the drawing air stream was 0.5 bar in each of the examples.
- the spunbonded nonwovens were produced as described above using the method according to the invention.
- the spunbonded nonwovens produced had weights per unit area between 10 and 40 g / m 2 .
- the spunbonded nonwovens were formed according to the information in Table 1 on a tray according to the invention provided with an embossed structure or on a conventional (unstructured) tray.
- Table 1 shows the measured thicknesses of the spunbonded nonwovens produced. This shows that the direct structuring of the spunbonded nonwoven when it is deposited with an embossed structure, despite otherwise identical process parameters, can achieve a significant change in the thickness of the spunbonded nonwoven.
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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 |
|---|---|---|---|
| EP20159095 | 2020-02-24 | ||
| PCT/EP2021/054497 WO2021170609A1 (de) | 2020-02-24 | 2021-02-24 | Verfahren zur herstellung von spinnvlies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4110978A1 true EP4110978A1 (de) | 2023-01-04 |
| EP4110978B1 EP4110978B1 (de) | 2026-04-01 |
Family
ID=69726504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21706601.8A Active EP4110978B1 (de) | 2020-02-24 | 2021-02-24 | Verfahren zur herstellung von spinnvlies |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US12247322B2 (de) |
| EP (1) | EP4110978B1 (de) |
| JP (1) | JP2023514424A (de) |
| KR (1) | KR20220139994A (de) |
| CN (1) | CN115135819A (de) |
| BR (1) | BR112022016436A2 (de) |
| TW (1) | TW202138647A (de) |
| WO (1) | WO2021170609A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024152299A1 (en) | 2023-01-19 | 2024-07-25 | The Procter & Gamble Company | Methods for making three-dimensional webs |
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| 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 |
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| CA2048905C (en) | 1990-12-21 | 1998-08-11 | Cherie H. Everhart | High pulp content nonwoven composite fabric |
| DE4312309C2 (de) | 1993-04-15 | 1995-06-08 | Reifenhaeuser Masch | Verfahren und Vorrichtungen zur Herstellung eines Spinnvlies-Flächenproduktes |
| US5361466A (en) | 1993-10-18 | 1994-11-08 | Schuller International, Inc. | Method of forming a blanket of uniform thickness |
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-
2021
- 2021-02-22 TW TW110106086A patent/TW202138647A/zh unknown
- 2021-02-24 KR KR1020227031995A patent/KR20220139994A/ko active Pending
- 2021-02-24 CN CN202180016502.1A patent/CN115135819A/zh active Pending
- 2021-02-24 US US17/801,595 patent/US12247322B2/en active Active
- 2021-02-24 WO PCT/EP2021/054497 patent/WO2021170609A1/de not_active Ceased
- 2021-02-24 BR BR112022016436A patent/BR112022016436A2/pt not_active Application Discontinuation
- 2021-02-24 JP JP2022550724A patent/JP2023514424A/ja active Pending
- 2021-02-24 EP EP21706601.8A patent/EP4110978B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4110978B1 (de) | 2026-04-01 |
| US20230098304A1 (en) | 2023-03-30 |
| JP2023514424A (ja) | 2023-04-05 |
| WO2021170609A1 (de) | 2021-09-02 |
| TW202138647A (zh) | 2021-10-16 |
| US12247322B2 (en) | 2025-03-11 |
| BR112022016436A2 (pt) | 2022-10-04 |
| KR20220139994A (ko) | 2022-10-17 |
| CN115135819A (zh) | 2022-09-30 |
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