EP3382081A1 - Device for the manufacture of woven material from continuous filaments - Google Patents
Device for the manufacture of woven material from continuous filaments Download PDFInfo
- Publication number
- EP3382081A1 EP3382081A1 EP17164375.2A EP17164375A EP3382081A1 EP 3382081 A1 EP3382081 A1 EP 3382081A1 EP 17164375 A EP17164375 A EP 17164375A EP 3382081 A1 EP3382081 A1 EP 3382081A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diffuser
- secondary air
- suction
- filaments
- width
- 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
- 238000004519 manufacturing process Methods 0.000 title description 6
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000000151 deposition Methods 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 18
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 239000012815 thermoplastic material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 description 11
- 239000000178 monomer Substances 0.000 description 8
- 238000005192 partition Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
-
- 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
- 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
- D04H3/033—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 reorientation immediately after yarn or filament formation
-
- 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
- D04H17/00—Felting apparatus
-
- 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
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
- D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D7/00—Collecting the newly-spun products
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic 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
-
- 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
-
- 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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/02—Spinnerettes
Definitions
- the invention relates to a device for producing spunbonded nonwovens from continuous filaments, in particular continuous filaments of thermoplastic material, with at least one spinnerette for spinning the filaments, at least one cooling device for cooling the filaments, at least one drawing device for stretching the filaments and at least one depositing device for filing the filaments Filaments to the nonwoven web.
- - Endless filaments means within the scope of the invention filaments with quasi endless length. These continuous filaments differ from staple fibers in that they have much smaller lengths of, for example, 10 to 60 mm.
- Devices of the aforementioned type are known in practice in principle in different embodiments. Such devices are also referred to as spunbond devices. Many of the devices known from practice of this type have the disadvantage that at high filament speeds and high throughputs or production speeds, the quality of the Filamentablage leaves something to be desired. This applies in particular to the homogeneity of the deposit as well as the strength of the nonwoven webs produced. High filament speeds and low titers of the filaments produced can often only be realized with significant losses in quality of the nonwoven webs produced. In that regard, the known devices can be improved.
- the invention is based on the technical problem of specifying a device of the type mentioned, in the high filament speeds and low titers and high production speeds can be realized and nonetheless the quality of the filament tray or the produced nonwoven web meets all requirements.
- the invention teaches a device for producing spunbonded non-wovens, in particular of thermoplastic material, with at least one spinnerette for spinning the filaments, at least one cooling device for cooling the filaments, at least one drawing device for stretching the filaments and at least one Storage device, in particular in the form of a storage screen belt, for depositing the filaments to the nonwoven web, wherein between the drawing device and the depositing device or the Ablagesiebband at least one diffuser is arranged so that filaments and primary air from the drawing device into the diffuser, wherein at least two arranged on opposite sides of the diffuser secondary air inlet gaps are provided in the region of the at least one diffuser through which secondary air enters the diffuser, wherein at least one secondary air inlet gap, preferably at least two secondary air inlet gaps are formed with the proviso that the secondary air flows in an inflow angle ⁇ to the filament flow direction FS and to the longitudinal center plane M of the device or the diffuser, said inflow angle ⁇ less than 100 ° , is advantageously
- the suction area extends with its width b below the diffuser over the entire width B of the diffuser outlet. It is also within the scope of the invention that the suction area is limited by two partitions arranged one behind the other in the machine direction. The width b of the suction region is measured, in particular, between the upper ends of the two partitions in the machine direction, facing the depositing device or the depositing screen belt. Conveniently, at least one exhaust fan is provided, is sucked with the process air in the suction through the storage device or by the Ablagesiebband.
- a plurality of suction regions can be arranged one after the other in the machine direction-for example, three suction regions-which differ from one another, in particular with respect to their extraction speed. Then it is in the claimed in claim 1 suction to the arranged under the diffuser outlet or directly below the diffuser outlet Hauptabsaug Colour.
- the suction area or main suction area arranged below the diffuser outlet or directly below the diffuser outlet can in turn be subdivided, for example through partitions.
- this suction or Hauptabsaug Symposium Scheme is characterized in that the suction speed over the entire width b of the suction is equal or substantially equal.
- the mean suction speed in the suction or Hauptabsaug Colour not more than 20%, in particular not more than 30% or not more than 40% and especially not more than 50%.
- an additional suction area arranged upstream of the suction area or main suction area according to an embodiment variant with respect to the machine direction (MD) and / or additional suction space arranged behind the suction area or main suction area with respect to the machine direction (MD).
- Absaug Scheme a suction speed is present, which is different from the suction speed of the suction or Hauptabsaug Kunststoffes.
- the width b of the suction region is at least 1.2 times, preferably at least 1.3 times and particularly preferably at least 1.4 times the width B of the diffuser outlet.
- the width b of the suction region can amount to at least 1.5 times, in particular at least 1.6 times or at least 1.7 times, the width B of the diffuser outlet.
- a very preferred embodiment of the device according to the invention is characterized in that the suction region with respect to the machine direction (MD) extends beyond the storage area of the filaments around a first suction section across the width of the diffuser outlet and / or wherein the suction region with respect to the machine direction (MD) in front of the storage area the filaments extend beyond a second suction section over the width of the diffuser exit.
- the suction area or the Kleinabsaug Scheme on both sides with respect to its width b beyond the width B of the diffuser outlet on the one side to the first suction and on the other side to the second suction section.
- the width b 1 of the first suction section and / or the width b 2 of the second suction section is 2 to 30%, preferably 2.5 to 25% and particularly preferably 3 to 20% of the width B of the diffuser outlet.
- a highly recommended embodiment of the invention is characterized in that the suction takes place by means of the suction device with the proviso that at least in the region of the diffuser outlet tertiary air flows along the outer surfaces of the diffuser walls in the direction of storage device or Ablagesiebband and at least a portion of this tertiary air the storage device or is sucked through the Ablagesiebband. It is within the scope of the invention that the tertiary air flows are aligned parallel or substantially parallel to the mixed flow of primary air and secondary air flowing in the direction of the diffuser outlet in the interior of the diffuser.
- the volume flow of the tertiary air V T extracted with the suction device is at least 25%, preferably at least 30%, preferably at least 40% and particularly preferably at least 50% of the volume flow of the extracted primary and secondary air streams.
- the preferred extraction of the tertiary air described above has proved successful insofar as unwanted turbulence in the storage area of the filaments can be avoided as a result.
- the continuous filaments are produced with a spunbond apparatus.
- the cooling device, the drawing device and the at least one diffuser transverse to the machine direction (MD) over the production width or across the width (DC width) extend the nonwoven web to be produced.
- the unit of cooling device and drawing device is designed as a closed unit and except the supply of cooling air in the cooling device is no further supply of a fluid medium or no further air supply in this closed unit of cooling device and drawing device instead. This closed unit or this closed system has proven particularly useful in the context of the invention and contributes effectively to the solution of the technical problem.
- the cooling device of the device according to the invention can only have a cooling chamber in which the filaments are exposed to cooling air or process air of a certain temperature.
- the cooling device has two superposed or successively arranged cooling chambers. In these two cooling chambers, the filaments can each be charged with cooling air or process air of different temperatures.
- the device can also be set up with the proviso that the exit velocity of the process air from an upper cooling chamber for cooling the filaments and the exit velocity from a lower cooling chamber is different.
- the secondary air inlet gaps or the secondary air introduced through these secondary air inlet gaps are the secondary air inlet gaps. It is within the scope of the invention that the secondary air inlet gaps extend across the entire width of the device transversely to the machine direction (in the CD direction). According to a very preferred embodiment of the invention, two opposing secondary air inlet gaps are arranged between the drawing device and the diffuser adjoining the drawing device. According to an embodiment variant According to the invention, two diffusers are arranged behind one another in the filament flow direction FS and two opposite secondary air inlet gaps are provided between the two diffusers. -Two secondary air inlet gaps can be arranged at the same vertical height. However, it is also within the scope of the invention that the secondary air inlet gaps are provided at different vertical heights of the device. According to a preferred embodiment of the invention, only two opposing secondary air inlet gaps are present, and more preferably between drawing device and diffuser.
- the inflow angle ⁇ of the secondary air is 80 ° to 110 °.
- a recommended embodiment is characterized in that the inflow angle ⁇ is less than 90 °, preferably less than 80 °, preferably less than 70 ° and particularly preferably less than 65 °. It has proven particularly useful that the inflow angle ⁇ is less than 60 °, preferably less than 55 °, and very preferably less than 50 °.
- the inflow angle ⁇ is between 0 and 60 °, advantageously between 1 and 55 °, preferably between 2 and 50 °, very preferably between 2 and 45 ° and particularly preferably between 2 and 40 °. It is particularly recommended that the inflow of the secondary air is carried out with the proviso that the secondary air flows after their entry parallel or quasi parallel to the filament flow direction FS.
- the secondary air inlet gaps are expediently set up correspondingly for realizing the inflow angle ⁇ , in particular with the aid of inflow slopes and / or inflow channels and the like.
- an oblique inflow wall adjoining or connected to a diffuser wall of the diffuser is provided for realizing the inflow angle ⁇ in the area of a secondary air inlet gap, which inflow wall encloses an angle with the filament flow direction FS which corresponds or substantially corresponds to the inflow angle ⁇ .
- a corresponding inflow wall is preferably provided for each secondary air inlet gap. Such an inflow wall is recommended to form an inflow slope for realizing the inflow angle ⁇ .
- inflow angle ⁇ has proven particularly useful in the context of the invention and contributes effectively to the solution of the technical problem.
- a high-quality filament deposit and a particularly homogeneous nonwoven web can be obtained.
- the closed system or the design of the unit of cooling device and drawing device as a closed unit.
- primary air means the process air which is passed through the drawing device and exits from the drawing device or from the drafting shaft of the drawing device into the diffuser.
- a very preferred embodiment of the invention is characterized in that in the region of the secondary air inlet column, the ratio of the volume flows of primary air and secondary air V P / V S is less than 5, preferably less than 4.8 and preferably less than 4.5.
- the volume flow entering through the secondary air inlet column is the secondary air adjustable, preferably adjustable for each secondary air inlet gap and independently adjustable according to a variant embodiment. It is recommended that this is the cross section of the secondary air inlet column variable or adjustable.
- the volume flow of secondary air entering through two secondary air inlet gaps arranged on opposite sides of the diffuser is equal to or substantially equal to or up to a maximum of 15%, in particular up to a maximum of 20% different.
- the vertical height of the secondary air inlet gaps is preferably 2 to 20 mm, preferably 3 to 18 mm and particularly preferably 5 to 15 mm.
- An embodiment of the invention is characterized in that the volume flow of the secondary air entering through the secondary air inlet gaps can be adjusted or varied over the CD width (transversely to the machine direction MD).
- the vertical height of the secondary air inlet gap is expediently set or changed over the CD width (transversely to the machine direction MD).
- the setting of the secondary air volume flows is recommended, provided that the volume flow of the incoming secondary air with respect to the CD direction to the edges of the device or to the edges of the secondary air inlet column decreases.
- the secondary air volume flow entering through the secondary air inlet gaps is smaller only in the edge regions of the secondary air inlet gaps than in the central region of the secondary air inlet gaps.
- These margins are recommended to have a length of 5 to 20 cm.
- a maximum of 75%, preferably a maximum of 80%, of the secondary air volume flow which occurs in the central region of the secondary air inlet gap is expediently supplied in the edge regions.
- a uniform inflow of secondary air through the secondary air inlet gaps takes place transversely to the machine direction or in the CD width of the device, specifically according to one embodiment variant of the invention, apart from the The aforementioned edge regions expediently in the entire central region of the secondary air inlet column.
- the invention is based on the recognition that a particularly homogeneous Filamentablage can be achieved or a very homogeneous Filamentablage can be achieved over the CD width.
- a highly recommended embodiment of the invention is characterized in that a convergent section of a diffuser or of the diffuser adjoins in the filament flow direction behind or below the secondary air inlet gaps.
- a convergent section of the diffuser is initially arranged in the filament flow direction behind or below the secondary air inlet gaps, then adjoins a constriction of the diffuser and a divergent section of the diffuser is provided behind or under the constriction ( convergent - bottleneck - divergent). In the bottleneck as it compacts the inflowed secondary air or the primary air-secondary air mixture.
- a preferred embodiment is characterized in that the convergent section of the diffuser is made shorter or significantly shorter than the divergent section of the diffuser.
- the length I K of the convergent diffuser section is at most 75%, preferably at most 60% and preferably at most 50% of the length I D of the divergent section of this diffuser. It is recommended that the length I K of the convergent section of the diffuser amounts to a maximum of 40%, preferably a maximum of 35% and preferably a maximum of 30% of the length I D of the divergent diffuser section.
- the ratio I K / I D of the length I K of the convergent diffuser section to the length I D of the divergent diffuser section is expediently 0.1 to 1 and preferably 0.15 to 0.9. It is recommended that the length I K of the convergent diffuser section is 5 to 50% and preferably 10 to 50% of the length L of the entire diffuser.
- the diffuser exit angle ⁇ of the diffuser outlet - or of the last diffuser section arranged in the filament flow direction over the depositing device - is at most 30 °, preferably at most 25 ° and very preferably at most 20 °.
- the diffuser exit angle ⁇ is measured between a diffuser wall of the divergent diffuser section and the longitudinal center axis M of the diffuser.
- the diffuser walls of the diffuser outlet forming divergent diffuser section are formed pivotable, so that the diffuser exit angle ⁇ is variable or adjustable.
- the width B of the diffuser outlet of the divergent diffuser section is at most 300%, preferably at most 250% and preferably at most 200% of the width V B of the exit slit of the drawing device or of the drawing shaft of the drawing device.
- a particularly preferred embodiment of the invention is characterized in that the distance of the diffuser or the lower edge - in particular the lowermost lower edge - of the diffuser to the storage device or the Ablagesiebband 20 to 300 mm, in particular 30 to 150 mm and preferably 30 to 120 mm is.
- a monomer suction device is arranged between the spinnerette and the cooling device.
- This Monomerabsaugungsvorraum air is sucked from the Filament avoirsraum below the spinnerette.
- the Monomerabsaugungsvorraum expediently has at least one suction chamber, to which preferably at least one suction fan is connected.
- the at least one suction chamber is toward the filament-forming space with at least one suction slot provided for the extraction of said gases.
- a particularly effective solution to the technical problem is further provided by a preferred embodiment of the invention, characterized in that at least a first deformable seal is arranged between the spinnerette and the monomer suction device for sealing a first gap formed between the spinnerette and the monomer suction device, and / or wherein at least one second deformable seal for sealing a second gap formed between the monomer suction device and the cooling device is provided between the monomer suction device and the cooling device and / or at least one third deformable seal for sealing between the cooling device and the drawing device or an intermediate channel of the drawing device a arranged between the cooling device and the drawing device or the intermediate channel third gap is arranged.
- the system properties, in particular the contact pressure or the contact pressure of such a deformable seal with respect to the boundary areas or boundary surfaces of the respective gap are variable or adjustable.
- Such a preferred deformable seal extends recommended over the entire width or over the entire CD width (transverse to the machine direction) of the device according to the invention. It is within the scope of the invention that such a deformable seal rotates over the entire circumference or substantially over the entire circumference of the filament flow passage. It is further within the scope of the invention that the height h of a gap to be sealed with a deformable seal is 3 to 35 mm, in particular 5 to 30 mm, and that the at least one deformable seal seals over this height h of the gap.
- the at least one deformable seal is an inflatable seal.
- the deformable seal may also have at least one by means of at least one spring element to a boundary surface of the gap to be sealed pressed sealing element.
- the sealing element may in particular be a sealing lip and thus a spring-loaded sealing lip in the case of the seal.
- the spring element is then expediently fixed to a boundary surface of the gap to be sealed and presses the sealing element or the sealing lip against the opposite boundary surface of the gap.
- the at least one deformable seal is designed with the proviso that sealing takes place at a pressure in the filament flow channel of more than 2,000 Pa, in particular of more than 2,500 Pa.
- the embodiment with the deformable seal has proven particularly useful in the context of the teaching according to the invention. In combination with the other inventive or preferred features of the device according to the invention optimum aerodynamic conditions in the device, which effectively contribute to solving the technical problem of the invention.
- the invention is based on the finding that with the device according to the invention nonwoven webs or spunbonded nonwovens of excellent quality can be produced. Above all, with the aid of the teaching according to the invention, a homogeneous filament deposit and thus a homogeneous nonwoven web can be produced both in the machine direction and also transversely to the machine direction. An optimal homogeneous nonwoven storage can be achieved especially at higher or at high production speeds. With the invention Device are high filament speeds and thus low titers of the filaments feasible, nevertheless good homogeneous filament deposition. High filament speeds and low titers can be achieved without difficulty at high throughputs or production speeds of, for example, more than 400 m / min. It should be emphasized that the device according to the invention is nonetheless relatively simple and of little complexity.
- the figures show a device according to the invention for producing spunbonded nonwovens from continuous filaments 1, in particular from continuous filaments 1 made of thermoplastic material.
- the device has a spinnerette 2 for spinning the continuous filaments 1 and a cooling device 3 for cooling the filaments.
- a monomer suction device 4 is arranged according to a particularly preferred embodiment of the invention. With this Monomerabsaugungsvoriques 4 occurring in the spinning process disturbing gases can be removed from the device. These may be, for example, monomers, oligomers or decomposition products and the like substances.
- a gap 5 is formed, which is usually around the entire Filament Struktursraum or filament flow space circulates.
- At least one deformable seal 6 for sealing said gap 5.
- the at least one deformable seal 6 expediently circulates in the gap 5 over the entire filament-forming space or filament flow space. It is within the scope of the invention that the system properties, in particular the contact pressure or the contact pressure of the seal 6 with respect to the boundary surfaces of the gap 5 can be varied or adjusted.
- the vertical height h of the gap 5 in the exemplary embodiment may be 5 to 30 mm and the at least one deformable seal 6 seals the gap 5 via this vertical height h of the gap 5.
- the at least one deformable seal 6 is a seal 6 that can be inflated with a fluid medium.
- the fluid medium-preferably air-the system properties in particular the contact pressure or contact pressure of the seal 6 can be achieved be varied.
- the cooling device 3 has two superposed or successively arranged cooling chambers, in which the filaments can be acted upon in particular with process air or cooling air of different temperature.
- a cooling device 3 with only one cooling chamber is also possible within the scope of the invention.
- the cooling device 3 is followed by a drawing device 7 for stretching the filaments 1 in the filament flow direction FS.
- the cooling device 3 is adjoined by an intermediate channel 8, which connects the cooling device 3 to a drawing shaft 9 of the drawing device 7 connects.
- the unit from the cooling device 3 and the drawing device 7 and the unit from the cooling device 3, the intermediate channel 8 and the drawing shaft 9 is formed as a closed system. Apart from the supply of cooling air in the cooling device 3 no further air supply takes place in this unit.
- the guided through the drawing device 7 and through the drawing tray 9 air is referred to here and below as the primary air P.
- At least one diffuser 10 adjoins the drawing device 7 in the filament flow direction FS.
- two opposing secondary air inlet gaps 11, 12 for the introduction of secondary air S are arranged between drawing device 7 or between drawing shaft 9 and the diffuser 10.
- the secondary air inlet gaps 11, 12 extend over the entire width or CD width of the device according to the invention.
- the secondary air is introduced through the secondary air inlet column with an inflow angle ⁇ , which is less than 100 °, advantageously less than or equal to 90 °, preferably less than 80 ° and less than 45 ° in the embodiment.
- the inflow angle ⁇ is between 0 and 60 °, preferably between 2 and 50 °.
- the inflow angle ⁇ are in the embodiment (see in particular Fig. 2 ) provided corresponding inflow guides 13, which are formed in the embodiment as obliquely connected to the secondary air inlet gaps 11, 12 inflow channels 14.
- the inflow channels 14 form an angle with the filament flow direction FS or with the longitudinal center axis M, with the proviso that the secondary air can flow in at the indicated inflow angle ⁇ .
- To Particularly preferred embodiment is a quasi-parallel inflow of secondary air to the filament flow direction FS instead.
- the volume flow of secondary air supplied through the secondary air inlet gaps 11, 12 can be adjusted. This can be realized in particular by adjusting the cross sections of the secondary air inlet gaps 11, 12. In principle, different volumetric flows of supplied secondary air S can also be set for the two opposing secondary air inlet gaps 11, 12. According to one embodiment of the invention, the secondary air volume flow flowing through the secondary air inlet gaps 11, 12 can be adjusted or varied transversely to the machine direction or over the CD width, preferably with respect to each secondary air inlet gap 11, 12. Expediently, the supplied secondary air volume flow in the edge regions of the device or the secondary air inlet gaps 11, 12 is different in comparison to the central region of the device or to the middle region of the secondary air inlet gaps 11, 12.
- the ratio of the volume flows of primary air and secondary air V P / V S is less than 5 and preferably less than 4.5.
- a diffuser 10 in the filament flow direction FS below the drawing device 7 is present.
- two or more diffusers 10 can be connected in series.
- the intended in the embodiment of the figures Diffuser 10, according to a preferred embodiment in the filament flow direction FS behind or below the secondary air inlet gaps 11, 12 on a convergent diffuser section 15.
- a constriction 16 of the diffuser 10 at this convergent diffuser portion 15 includes preferred and in the embodiment, a constriction 16 of the diffuser 10 at.
- the diffuser 10 is preferably equipped with a divergent diffuser section 17 in the exemplary embodiment.
- the divergent diffuser portion 17 of the diffuser 10 in the filament flow direction FS longer or significantly longer than the convergent diffuser section 15.
- the length I K of the convergent diffuser section 15 is less than 50% of the length I D of the divergent diffuser section 17th
- the diffuser exit angle ⁇ between a diffuser wall 18 of the divergent diffuser section 17 and the longitudinal center axis M of the diffuser 10 is a maximum of 25 °.
- the width B of the diffuser outlet 19 is at most 300%, preferably at most 250%, of the width V B of the exit slit 20 of the drawing shaft 9.
- the continuous filaments 1 emerging from the diffuser 10 are deposited on a filing tray or nonwoven web 22 depositing device designed as a filing belt 21.
- the filament deposit or nonwoven web 22 is then conveyed away or transported away with the deposit cloth belt 21 in the machine direction MD.
- an extraction device is provided for extracting air or process air through the depositing device or through the deposit screen belt 21.
- a suction region 23 is arranged below the diffuser outlet 19, which has a width b in the machine direction (MD). This width b of the suction region 23 is according to the invention greater than the width B of the diffuser exit 19. In the Fig. 2 the widths b and B are shown.
- the width b of the suction region 23 is at least 1.2 times, preferably at least 1.3 times the width B of the diffuser exit 19.
- the width B of the diffuser exit 19 is a horizontal distance of the lower ends the diffuser walls 18 measured. If the ends of the diffuser walls 18 of the divergent diffuser section 17 do not terminate in the same horizontal plane or at the same vertical height, preferably the distance of the end of the longer diffuser wall 18 from the end of the elongated shorter diffuser wall 18 is at the same vertical height measured.
- the suction area 23 arranged below the storage belt 21 is delimited by two partitions 27, 28 arranged one behind the other in the machine direction MD.
- the width b of the suction region 23 is measured as a distance between the two partitions 27, 28, and in particular as a distance between the upper ends of the two partitions 27, 28.
- the suction region 23 with respect to the machine direction (MD) behind the storage area of the filaments 1 extends beyond a first suction section 24 via the diffuser exit 19 or across the width B of the diffuser exit 19.
- the suction region 23 protrudes beyond the deposition region of the filaments 1 by a second suction section 25 beyond the diffuser exit 19 or across the width B of the diffuser exit 19.
- the first suction section 24 has a width b 1 and the second suction section 25 has a width b 2 .
- the widths b 1 and b 2 are the same size. In principle, however, they could also be designed differently.
- the suction is carried out by the Ablagesiebband 21 with the proviso that flows in the region of the diffuser outlet 19 tertiary air T along the outer surfaces 26 in the direction of Ablagesiebband 21.
- the streams of tertiary air T are aligned parallel or substantially parallel to the mixed flow of primary air P and secondary air S flowing in the direction of the diffuser outlet 19 of the diffuser 10.
- primary air P and secondary air S and tertiary air T is sucked.
- the streams of primary air P, secondary air S and tertiary air T flow parallel or quasi parallel through the deposit screen belt 21.
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Abstract
Vorrichtung zur Herstellung von Spinnvliesen aus Endlosfilamenten mit zumindest einer Spinnerette, zumindest einer Kühlvorrichtung, zumindest einer Verstreckvorrichtung und mit zumindest einer Ablageeinrichtung zur Ablage der Filamente. Zwischen der Verstreckvorrichtung und der Ablageeinrichtung ist zumindest ein Diffusor angeordnet, so dass Filamente und Primärluft aus der Verstreckvorrichtung in den Diffusor gelangen. Im Bereich des zumindest einen Diffusors sind zumindest zwei an gegenüberliegenden Seiten des Diffusors angeordnete Sekundärluft-Eintrittsspalte vorgesehen. Zumindest ein Sekundärluft-Eintrittsspalt ist mit der Maßgabe ausgebildet, dass die Sekundärluft in einem Winkel α zur Filamentströmungsrichtung einströmt, wobei der Winkel α kleiner als 100° ist. Es ist eine Absaugungseinrichtung zum Absaugen von Luft durch die Ablageeinrichtung vorgesehen. Ein unterhalb des Diffusoraustrittes angeordneter Absaugbereich weist eine Breite b in Maschinenrichtung auf, die größer ist als die Breite B des Diffusoraustrittes. Apparatus for producing spunbonded nonwovens from endless filaments with at least one spinnerette, at least one cooling device, at least one drawing device and at least one depositing device for depositing the filaments. At least one diffuser is arranged between the drawing device and the depositing device so that filaments and primary air pass from the drawing device into the diffuser. In the region of the at least one diffuser, at least two secondary air inlet gaps arranged on opposite sides of the diffuser are provided. At least one secondary air inlet gap is formed with the proviso that the secondary air flows in at an angle α to the filament flow direction, wherein the angle α is less than 100 °. There is provided a suction device for sucking air through the storage device. A suction region arranged below the diffuser outlet has a width b in the machine direction which is greater than the width B of the diffuser outlet.
Description
Die Erfindung betrifft eine Vorrichtung zur Herstellung von Spinnvliesen aus Endlosfilamenten, insbesondere Endlosfilamenten aus thermoplastischem Kunststoff, mit zumindest einer Spinnerette zum Erspinnen der Endlosfilamente, zumindest einer Kühlvorrichtung zur Kühlung der Filamente, zumindest einer Verstreckvorrichtung zum Verstrecken der Filamente und mit zumindest einer Ablageeinrichtung zur Ablage der Filamente zur Vliesbahn. - Endlosfilamente meint im Rahmen der Erfindung Filamente mit quasi endloser Länge. Diese Endlosfilamente unterscheiden sich insofern von Stapelfasern, die viel geringere Längen von beispielsweise 10 bis 60 mm aufweisen.The invention relates to a device for producing spunbonded nonwovens from continuous filaments, in particular continuous filaments of thermoplastic material, with at least one spinnerette for spinning the filaments, at least one cooling device for cooling the filaments, at least one drawing device for stretching the filaments and at least one depositing device for filing the filaments Filaments to the nonwoven web. - Endless filaments means within the scope of the invention filaments with quasi endless length. These continuous filaments differ from staple fibers in that they have much smaller lengths of, for example, 10 to 60 mm.
Vorrichtungen der vorstehend genannten Art sind aus der Praxis prinzipiell in unterschiedlichen Ausführungsformen bekannt. Solche Vorrichtungen werden auch als Spunbond-Vorrichtungen bezeichnet. Viele der aus der Praxis bekannten Vorrichtungen dieser Art weisen den Nachteil auf, dass bei hohen Filamentgeschwindigkeiten und hohen Durchsätzen bzw. Produktionsgeschwindigkeiten die Qualität der Filamentablage zu wünschen übrig lässt. Das betrifft insbesondere die Homogenität der Ablage sowie die Festigkeit der hergestellten Vliesbahnen. Hohe Filamentgeschwindigkeiten und geringe Titer der erzeugten Filamente lassen sich oftmals nur mit deutlichen Qualitätseinbußen der hergestellten Vliesbahnen realisieren. Insoweit sind die bekannten Vorrichtungen verbesserungsfähig.Devices of the aforementioned type are known in practice in principle in different embodiments. Such devices are also referred to as spunbond devices. Many of the devices known from practice of this type have the disadvantage that at high filament speeds and high throughputs or production speeds, the quality of the Filamentablage leaves something to be desired. This applies in particular to the homogeneity of the deposit as well as the strength of the nonwoven webs produced. High filament speeds and low titers of the filaments produced can often only be realized with significant losses in quality of the nonwoven webs produced. In that regard, the known devices can be improved.
Dementsprechend liegt der Erfindung das technische Problem zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, bei der hohe Filamentgeschwindigkeiten und niedrige Titer sowie hohe Produktionsgeschwindigkeiten realisiert werden können und nichtsdestoweniger die Qualität der Filamentablage bzw. der erzeugten Vliesbahn allen Anforderungen entspricht.Accordingly, the invention is based on the technical problem of specifying a device of the type mentioned, in the high filament speeds and low titers and high production speeds can be realized and nonetheless the quality of the filament tray or the produced nonwoven web meets all requirements.
Zur Lösung dieses technischen Problems lehrt die Erfindung eine Vorrichtung zur Herstellung von Spinnvliesen aus Endlosfilamenten, insbesondere aus thermoplastischem Kunststoff, mit zumindest einer Spinnerette zum Erspinnen der Endlosfilamente, zumindest einer Kühlvorrichtung zur Kühlung der Filamente, zumindest einer Verstreckvorrichtung zum Verstrecken der Filamente und mit zumindest einer Ablageeinrichtung, insbesondere in Form eines Ablagesiebbandes, zur Ablage der Filamente zur Vliesbahn,
wobei zwischen der Verstreckvorrichtung und der Ablageeinrichtung bzw. dem Ablagesiebband zumindest ein Diffusor angeordnet ist, so dass Filamente und Primärluft aus der Verstreckvorrichtung in den Diffusor gelangen, wobei im Bereich des zumindest einen Diffusors zumindest zwei an gegenüberliegenden Seiten des Diffusors angeordnete Sekundärluft-Eintrittsspalte vorgesehen sind, durch die Sekundärluft in den Diffusor gelangt,
wobei zumindest ein Sekundärluft-Eintrittsspalt, vorzugsweise zumindest zwei Sekundärluft-Eintrittsspalte mit der Maßgabe ausgebildet sind, dass die Sekundärluft in einem Zuströmwinkel α zur Filamentströmungsrichtung FS bzw. zur Längsmittelebene M der Vorrichtung bzw. des Diffusors einströmt, wobei dieser Zuströmwinkel α kleiner als 100°, zweckmäßigerweise kleiner oder gleich 90°, vorzugsweise kleiner als 80°, bevorzugt kleiner als 70° und besonders bevorzugt kleiner als 65° ist,
wobei der in Filamentströmungsrichtung FS letzte Diffusorabschnitt zur Ablageeinrichtung hin divergierende Diffusorwände aufweist, wobei diese Diffusorwände einen Diffusoraustritt mit einer Breite B bezüglich der Maschinenrichtung (MD) bilden,
wobei eine Absaugungseinrichtung zum Absaugen von Luft bzw. Prozessluft durch die Ablageeinrichtung bzw. durch das Ablagesiebband vorgesehen ist und wobei ein unterhalb des Diffusoraustrittes angeordneter Absaugbereich eine Breite b in Maschinenrichtung (MD) aufweist, welche Breite b größer ist als die Breite B des Diffusoraustrittes. - Maschinenrichtung (MD) meint im Rahmen der Erfindung insbesondere die Förderrichtung der Filamentablage bzw. der Vliesbahn auf der Ablageeinrichtung bzw auf dem Ablagesiebband.To solve this technical problem, the invention teaches a device for producing spunbonded non-wovens, in particular of thermoplastic material, with at least one spinnerette for spinning the filaments, at least one cooling device for cooling the filaments, at least one drawing device for stretching the filaments and at least one Storage device, in particular in the form of a storage screen belt, for depositing the filaments to the nonwoven web,
wherein between the drawing device and the depositing device or the Ablagesiebband at least one diffuser is arranged so that filaments and primary air from the drawing device into the diffuser, wherein at least two arranged on opposite sides of the diffuser secondary air inlet gaps are provided in the region of the at least one diffuser through which secondary air enters the diffuser,
wherein at least one secondary air inlet gap, preferably at least two secondary air inlet gaps are formed with the proviso that the secondary air flows in an inflow angle α to the filament flow direction FS and to the longitudinal center plane M of the device or the diffuser, said inflow angle α less than 100 ° , is advantageously less than or equal to 90 °, preferably less than 80 °, preferably less than 70 ° and particularly preferably less than 65 °,
wherein the last in the filament flow direction FS last diffuser section to the storage device towards diverging diffuser walls, said diffuser walls form a diffuser exit with a width B with respect to the machine direction (MD),
wherein a suction device for extracting air or process air through the depositing device or through the Ablagesiebband is provided and wherein a arranged below the diffuser outlet suction region has a width b in the machine direction (MD), which width b is greater than the width B of the diffuser exit. - Machine direction (MD) means in the context of the invention, in particular the conveying direction of the filament or the nonwoven web on the storage device or on the Ablagesiebband.
Es liegt im Rahmen der Erfindung, dass sich der Absaugbereich mit seiner Breite b unterhalb des Diffusors über die gesamte Breite B des Diffusoraustrittes erstreckt. Es liegt weiterhin im Rahmen der Erfindung, dass der Absaugbereich durch zwei in Maschinenrichtung hintereinander angeordnete Trennwände begrenzt wird. Die Breite b des Absaugbereiches wird insbesondere zwischen den oberen - der Ablageeinrichtung bzw. dem Ablagesiebband zugewandten - Enden der beiden Trennwände in Maschinenrichtung gemessen. Zweckmäßigerweise ist zumindest ein Absauggebläse vorgesehen, mit dem Prozessluft in dem Absaugbereich durch die Ablageeinrichtung bzw. durch das Ablagesiebband gesaugt wird. Gemäß einer Ausführungsform der Erfindung können in Maschinenrichtung mehrere Absaugbereiche hintereinander angeordnet sein - beispielsweise drei Absaugbereiche -, die sich insbesondere bezüglich ihrer Absauggeschwindigkeit voneinander unterscheiden. Dann handelt es sich bei dem im Patentanspruch 1 beanspruchten Absaugbereich um den unter dem Diffusoraustritt bzw. unmittelbar unter dem Diffusoraustritt angeordneten Hauptabsaugbereich. - Grundsätzlich kann der unter dem Diffusoraustritt bzw. unmittelbar unter dem Diffusoraustritt angeordnete Absaugbereich bzw. Hauptabsaugbereich seinerseits unterteilt sein, beispielsweise durch Trennwände. Dann zeichnet sich dieser Absaugbereich bzw. Hauptabsaugbereich dadurch aus, dass die Absauggeschwindigkeit über die gesamte Breite b des Absaugbereiches gleich ist bzw. im Wesentlichen gleich ist. Zweckmäßigerweise variiert die mittlere Absauggeschwindigkeit in dem Absaugbereich bzw. Hauptabsaugbereich nicht mehr als 20 %, insbesondere nicht mehr als 30 % oder nicht mehr als 40 % und vor allem nicht mehr als 50 %. Es liegt in diesem Zusammenhang im Rahmen der Erfindung, dass in einem gemäß einer Ausführungsvariante bezüglich der Maschinenrichtung (MD) vor dem Absaugbereich bzw. Hauptabsaugbereich angeordneten Zusatz-absaugbereich und/oder bezüglich der Maschinenrichtung (MD) hinter dem Absaugbereich bzw. Hauptabsaugbereich angeordneten Zusatz-Absaugbereich eine Absauggeschwindigkeit vorliegt, die unterschiedlich zu der Absauggeschwindigkeit des Absaugbereiches bzw. Hauptabsaugbereiches ist.It is within the scope of the invention that the suction area extends with its width b below the diffuser over the entire width B of the diffuser outlet. It is also within the scope of the invention that the suction area is limited by two partitions arranged one behind the other in the machine direction. The width b of the suction region is measured, in particular, between the upper ends of the two partitions in the machine direction, facing the depositing device or the depositing screen belt. Conveniently, at least one exhaust fan is provided, is sucked with the process air in the suction through the storage device or by the Ablagesiebband. According to one embodiment of the invention, a plurality of suction regions can be arranged one after the other in the machine direction-for example, three suction regions-which differ from one another, in particular with respect to their extraction speed. Then it is in the claimed in
Nach besonders empfohlener Ausführungsform der Erfindung beträgt die Breite b des Absaugbereiches mindestens das 1,2-fache, bevorzugt mindestens das 1,3-fache und besonders bevorzugt mindestens das 1,4-fache der Breite B des Diffusoraustrittes. Nach einer Ausführungsvariante kann die Breite b des Absaugbereiches mindestens das 1,5-fache, insbesondere mindestens das 1,6-fache oder mindestens das 1,7-fache der Breite B des Diffusoraustrittes betragen.According to a particularly recommended embodiment of the invention, the width b of the suction region is at least 1.2 times, preferably at least 1.3 times and particularly preferably at least 1.4 times the width B of the diffuser outlet. According to one embodiment variant, the width b of the suction region can amount to at least 1.5 times, in particular at least 1.6 times or at least 1.7 times, the width B of the diffuser outlet.
Eine sehr bevorzugte Ausführungsform der erfindungsgemäßen Vorrichtung ist dadurch gekennzeichnet, dass der Absaugbereich bezüglich der Maschinenrichtung (MD) hinter dem Ablagebereich der Filamente um einen ersten Absaugabschnitt über die Breite des Diffusoraustrittes hinausragt und/oder wobei der Absaugbereich bezüglich der Maschinenrichtung (MD) vor dem Ablagebereich der Filamente um einen zweiten Absaugabschnitt über die Breite des Diffusoraustrittes hinausragt. Vorzugweise ragt der Absaugbereich bzw. der Hauptabsaugbereich an beiden Seiten bezüglich seiner Breite b über die Breite B des Diffusoraustrittes hinaus und zwar an der einen Seite um den ersten Absaugabschnitt und an der anderen Seite um den zweiten Absaugabschnitt. Zweckmäßigerweise beträgt die Breite b1 des ersten Absaugabschnittes und/oder die Breite b2 des zweiten Absaugabschnittes 2 bis 30 %, bevorzugt 2,5 bis 25 % und besonders bevorzugt 3 bis 20 % der Breite B des Diffusoraustrittes.A very preferred embodiment of the device according to the invention is characterized in that the suction region with respect to the machine direction (MD) extends beyond the storage area of the filaments around a first suction section across the width of the diffuser outlet and / or wherein the suction region with respect to the machine direction (MD) in front of the storage area the filaments extend beyond a second suction section over the width of the diffuser exit. Preferably, the suction area or the Hauptabsaugbereich on both sides with respect to its width b beyond the width B of the diffuser outlet on the one side to the first suction and on the other side to the second suction section. Expediently, the width b 1 of the first suction section and / or the width b 2 of the second suction section is 2 to 30%, preferably 2.5 to 25% and particularly preferably 3 to 20% of the width B of the diffuser outlet.
Eine sehr empfohlene Ausführungsform der Erfindung zeichnet sich dadurch aus, dass die Absaugung mittels der Absaugungseinrichtung mit der Maßgabe erfolgt, dass zumindest im Bereich des Diffusoraustritts Tertiärluft entlang der äußeren Oberflächen der Diffusorwände in Richtung Ablageeinrichtung bzw. Ablagesiebband strömt und das zumindest ein Teil dieser Tertiärluft durch die Ablageeinrichtung bzw. durch das Ablagesiebband gesaugt wird. Es liegt dabei im Rahmen der Erfindung, dass die Tertiärluftströme parallel bzw. im Wesentlichen parallel zu dem in Richtung Diffusoraustritt im Inneren des Diffusors strömenden Mischstrom aus Primärluft und Sekundärluft ausgerichtet sind. Es empfiehlt sich, dass der mit der Absaugungseinrichtung abgesaugte Volumenstrom der Tertiärluft VT mindestens 25 %, vorzugsweise mindestens 30 %, bevorzugt mindestens 40 % und besonders bevorzugt mindestens 50 % des Volumenstromes der abgesaugten Primär- und Sekundärluftströme beträgt. Die vorstehend beschriebene bevorzugte Absaugung der Tertiärluft hat sich insoweit bewährt, als dadurch unerwünschte Verwirbelungen im Ablagebereich der Filamente vermieden werden können.A highly recommended embodiment of the invention is characterized in that the suction takes place by means of the suction device with the proviso that at least in the region of the diffuser outlet tertiary air flows along the outer surfaces of the diffuser walls in the direction of storage device or Ablagesiebband and at least a portion of this tertiary air the storage device or is sucked through the Ablagesiebband. It is within the scope of the invention that the tertiary air flows are aligned parallel or substantially parallel to the mixed flow of primary air and secondary air flowing in the direction of the diffuser outlet in the interior of the diffuser. It is recommended that the volume flow of the tertiary air V T extracted with the suction device is at least 25%, preferably at least 30%, preferably at least 40% and particularly preferably at least 50% of the volume flow of the extracted primary and secondary air streams. The preferred extraction of the tertiary air described above has proved successful insofar as unwanted turbulence in the storage area of the filaments can be avoided as a result.
Erfindungsgemäß werden die Endlosfilamente mit einer Spunbond-Vorrichtung hergestellt. Es liegt dabei im Rahmen der Erfindung, dass sich die Kühlvorrichtung, die Verstreckvorrichtung und der zumindest eine Diffusor quer zur Maschinenrichtung (MD) über die Produktionsbreite bzw. über die Breite (DC-Breite) der herzustellenden Vliesbahn erstrecken. Nach besonders bevorzugter Ausführungsform der Erfindung ist das Aggregat aus Kühlvorrichtung und Verstreckvorrichtung als geschlossenes Aggregat ausgebildet und außer der Zufuhr der Kühlluft in der Kühlvorrichtung findet keine weitere Zufuhr eines fluiden Mediums bzw. keine weitere Luftzufuhr in dieses geschlossene Aggregat aus Kühlvorrichtung und Verstreckvorrichtung statt. Dieses geschlossene Aggregat bzw. dieses geschlossene System hat sich im Rahmen der Erfindung besonders bewährt und trägt effektiv zur Lösung des technischen Problems bei.According to the invention the continuous filaments are produced with a spunbond apparatus. It is within the scope of the invention that the cooling device, the drawing device and the at least one diffuser transverse to the machine direction (MD) over the production width or across the width (DC width) extend the nonwoven web to be produced. According to a particularly preferred embodiment of the invention, the unit of cooling device and drawing device is designed as a closed unit and except the supply of cooling air in the cooling device is no further supply of a fluid medium or no further air supply in this closed unit of cooling device and drawing device instead. This closed unit or this closed system has proven particularly useful in the context of the invention and contributes effectively to the solution of the technical problem.
Die Kühlvorrichtung der erfindungsgemäßen Vorrichtung kann lediglich eine Kühlkammer aufweisen, in der die Filamente mit Kühlluft bzw. Prozessluft einer bestimmten Temperatur beaufschlagt werden. Gemäß einer weiteren Ausführungsform der Erfindung weist die Kühlvorrichtung zwei übereinander bzw. hintereinander angeordnete Kühlkammern auf. In diesen beiden Kühlkammern können die Filamente jeweils mit Kühlluft bzw. Prozessluft unterschiedlicher Temperatur beaufschlagt werden. Die Vorrichtung kann auch mit der Maßgabe eingerichtet sein, dass die Austrittsgeschwindigkeit der Prozessluft aus einer oberen Kühlkammer zur Kühlung der Filamente und die Austrittsgeschwindigkeit aus einer unteren Kühlkammer unterschiedlich ist.The cooling device of the device according to the invention can only have a cooling chamber in which the filaments are exposed to cooling air or process air of a certain temperature. According to a further embodiment of the invention, the cooling device has two superposed or successively arranged cooling chambers. In these two cooling chambers, the filaments can each be charged with cooling air or process air of different temperatures. The device can also be set up with the proviso that the exit velocity of the process air from an upper cooling chamber for cooling the filaments and the exit velocity from a lower cooling chamber is different.
Besondere Bedeutung kommen im Rahmen der Erfindung den Sekundärluft-Eintrittsspalten bzw. der durch diese Sekundärluft-Eintrittsspalte eingeleiteten Sekundärluft zu. Es liegt dabei im Rahmen der Erfindung, dass sich die Sekundärluft-Eintrittsspalte über die gesamte Breite der Vorrichtung quer zur Maschinenrichtung (in CD-Richtung) erstrecken. Nach einer sehr bevorzugten Ausführungsform der Erfindung sind zwei gegenüberliegende Sekundärluft-Eintrittsspalte zwischen der Verstreckvorrichtung und dem an die Verstreckvorrichtung anschließenden Diffusor angeordnet. Gemäß einer Ausführungsvariante der Erfindung sind in Filamentströmungsrichtung FS zwei Diffusoren hintereinander angeordnet und zwei gegenüberliegende Sekundärluft-Eintrittsspalte sind zwischen den beiden Diffusoren vorgesehen. -Zwei Sekundärluft-Eintrittsspalte können auf der gleichen vertikalen Höhe angeordnet sein. Es liegt aber auch im Rahmen der Erfindung, dass die Sekundärluft-Eintrittsspalte auf verschiedenen vertikalen Höhen der Vorrichtung vorgesehen sind. Nach einer bevorzugten Ausführungsform der Erfindung sind lediglich zwei gegenüberliegende Sekundärluft-Eintrittsspalte vorhanden und zwar besonders bevorzugt zwischen Verstreckvorrichtung und Diffusor.Of particular importance in the context of the invention are the secondary air inlet gaps or the secondary air introduced through these secondary air inlet gaps. It is within the scope of the invention that the secondary air inlet gaps extend across the entire width of the device transversely to the machine direction (in the CD direction). According to a very preferred embodiment of the invention, two opposing secondary air inlet gaps are arranged between the drawing device and the diffuser adjoining the drawing device. According to an embodiment variant According to the invention, two diffusers are arranged behind one another in the filament flow direction FS and two opposite secondary air inlet gaps are provided between the two diffusers. -Two secondary air inlet gaps can be arranged at the same vertical height. However, it is also within the scope of the invention that the secondary air inlet gaps are provided at different vertical heights of the device. According to a preferred embodiment of the invention, only two opposing secondary air inlet gaps are present, and more preferably between drawing device and diffuser.
Besondere Bedeutung kommt weiterhin dem Zuströmwinkel α der Sekundärluft zu. Erfindungsgemäß ist zumindest ein Sekundärluft-Eintrittsspalt und bevorzugt sind zumindest zwei Sekundärluft-Eintrittsspalte, besonders bevorzugt zwei Sekundärluft-Eintrittsspalte mit der Maßgabe ausgebildet, dass die Sekundärluft in einem Zuströmwinkel α zur Filamentströmungsrichtung FS einströmt. Gemäß einer Ausführungsform der Erfindung beträgt der Zuströmwinkel α 80° bis 110°. Eine empfohlene Ausführungsform ist dadurch gekennzeichnet, dass der Zuströmwinkel α kleiner als 90° ist, vorzugsweise kleiner als 80°, bevorzugt kleiner als 70° und besonders bevorzugt kleiner als 65° ist. Dabei hat es sich besonders bewährt, dass der Zuströmwinkel α kleiner als 60°, bevorzugt kleiner als 55° und sehr bevorzugt kleiner als 50° ist. Gemäß sehr empfohlener Ausführungsform liegt der Zuströmwinkel α zwischen 0 und 60°, zweckmäßigerweise zwischen 1 und 55°, bevorzugt zwischen 2 und 50°, sehr bevorzugt zwischen 2 und 45° und besonders bevorzugt zwischen 2 und 40°. Es empfiehlt sich ganz besonders, dass die Zuströmung der Sekundärluft mit der Maßgabe erfolgt, dass die Sekundärluft nach ihrem Eintritt parallel bzw. quasi parallel zur Filamentströmungsrichtung FS strömt.Particular importance is still attached to the inflow angle α of the secondary air. According to the invention, at least one secondary air inlet gap and preferably at least two secondary air inlet gaps, particularly preferably two secondary air inlet gaps are formed with the proviso that the secondary air flows in an inflow angle α to the filament flow direction FS. According to one embodiment of the invention, the inflow angle α is 80 ° to 110 °. A recommended embodiment is characterized in that the inflow angle α is less than 90 °, preferably less than 80 °, preferably less than 70 ° and particularly preferably less than 65 °. It has proven particularly useful that the inflow angle α is less than 60 °, preferably less than 55 °, and very preferably less than 50 °. According to a highly recommended embodiment, the inflow angle α is between 0 and 60 °, advantageously between 1 and 55 °, preferably between 2 and 50 °, very preferably between 2 and 45 ° and particularly preferably between 2 and 40 °. It is particularly recommended that the inflow of the secondary air is carried out with the proviso that the secondary air flows after their entry parallel or quasi parallel to the filament flow direction FS.
Zweckmäßigerweise werden die Sekundärluft-Eintrittsspalte zur Realisierung des Zuströmwinkels α entsprechend eingerichtet, insbesondere mit Hilfe von Zuströmschrägen und/oder Zuströmkanälen und dergleichen. Gemäß bevorzugter Ausführungsform ist zur Realisierung des Zuströmwinkels α im Bereich eines Sekundärluft-Eintrittsspaltes eine an eine Diffusorwand des Diffusors anschließende bzw. angeschlossene schräge Zuströmwandung vorgesehen, welche Zuströmwandung mit der Filamentströmungsrichtung FS einen Winkel einschließt, der dem Zuströmwinkel α entspricht bzw. im Wesentlichen entspricht. Vorzugsweise ist bei dieser Ausführungsform für jeden Sekundärluft-Eintrittspalt eine entsprechende Zuströmwandung vorgesehen. Eine solche Zuströmwandung bildet empfohlenermaßen eine Zuströmschräge zur Realisierung des Zuströmwinkels α. - Die Verwirklichung des erfindungsgemäßen Zuströmwinkels α hat sich im Rahmen der Erfindung besonders bewährt und trägt effektiv zur Lösung des technischen Problems bei. In Kombination mit der erfindungsgemäßen Ausgestaltung des Absaugbereiches kann eine qualitativ hochwertige Filamentablage und eine besonders homogene Vliesbahn erhalten werden. Besondere Bedeutung kommt im Rahmen der Kombination der Merkmale der erfindungsgemäßen Vorrichtung auch dem geschlossenen System bzw. der Ausgestaltung des Aggregates aus Kühlvorrichtung und Verstreckvorrichtung als geschlossenes Aggregat zu.The secondary air inlet gaps are expediently set up correspondingly for realizing the inflow angle α, in particular with the aid of inflow slopes and / or inflow channels and the like. According to a preferred embodiment, an oblique inflow wall adjoining or connected to a diffuser wall of the diffuser is provided for realizing the inflow angle α in the area of a secondary air inlet gap, which inflow wall encloses an angle with the filament flow direction FS which corresponds or substantially corresponds to the inflow angle α. In this embodiment, a corresponding inflow wall is preferably provided for each secondary air inlet gap. Such an inflow wall is recommended to form an inflow slope for realizing the inflow angle α. The realization of the inflow angle α according to the invention has proven particularly useful in the context of the invention and contributes effectively to the solution of the technical problem. In combination with the embodiment of the suction region according to the invention, a high-quality filament deposit and a particularly homogeneous nonwoven web can be obtained. Of particular importance in the context of the combination of the features of the device according to the invention also the closed system or the design of the unit of cooling device and drawing device as a closed unit.
Primärluft meint im Rahmen der Erfindung die durch die Verstreckvorrichtung geleitete Prozessluft, die aus der Verstreckvorrichtung bzw. aus dem Verstreckschacht der Verstreckvorrichtung in den Diffusor austritt. Eine sehr bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass im Bereich der Sekundärluft-Eintrittsspalte das Verhältnis der Volumenströme von Primärluft und Sekundärluft VP/VS kleiner als 5, vorzugsweise kleiner als 4,8 und bevorzugt kleiner als 4,5 ist. - Gemäß empfohlener Ausführungsform der Erfindung ist der durch die Sekundärluft-Eintrittsspalte eintretende Volumenstrom der Sekundärluft einstellbar, bevorzugt für jeden Sekundärluft-Eintrittsspalt einstellbar und nach einer Ausführungsvariante unabhängig voneinander einstellbar. Es empfiehlt sich, dass hierzu der Querschnitt der Sekundärluft-Eintrittsspalte variierbar bzw. einstellbar ist. Zweckmäßigerweise ist der durch zwei an gegenüberliegenden Seiten des Diffusors angeordnete Sekundärluft-Eintrittsspalte jeweils eintretende Volumenstrom an Sekundärluft gleich bzw. im Wesentlichen gleich oder bis maximal 15 %, insbesondere bis zu maximal 20 % unterschiedlich. Vorzugsweise beträgt die vertikale Höhe der Sekundärluft-Eintrittsspalte 2 bis 20 mm, bevorzugt 3 bis 18 mm und besonders bevorzugt 5 bis 15 mm. Eine Ausführungsform der Erfindung zeichnet sich dadurch aus, dass sich der Volumenstrom der durch die Sekundärluft-Eintrittsspalte eintretenden Sekundärluft über die CD-Breite (quer zur Maschinenrichtung MD) einstellen bzw. variieren lässt. Zweckmäßigerweise wird hierzu die vertikale Höhe der Sekundärluft-Eintrittsspalte über die CD-Breite (quer zur Maschinenrichtung MD) eingestellt bzw. verändert. Die Einstellung der Sekundärluft-Volumenströme wird empfohlenermaßen mit der Maßgabe vorgenommen, dass der Volumenstrom der zuströmenden Sekundärluft bezüglich der CD-Richtung zu den Rändern der Vorrichtung bzw. zu den Rändern der Sekundärluft-Eintrittsspalte abnimmt. Vorzugsweise ist der durch die Sekundärluft-Eintrittsspalte eintretende Sekundärluft-Volumenstrom lediglich in den Randbereichen der Sekundärluft-Eintrittsspalte geringer als im mittleren Bereich der Sekundärluft-Eintrittsspalte. Diese Randbereiche weisen dabei empfohlenermaßen eine Länge von 5 bis 20 cm auf. In den Randbereichen wird zweckmäßigerweise maximal 75 %, bevorzugt maximal 80 % des Sekundärluft-Volumenstromes zugeführt, der im mittleren Bereich der Sekundärluft-Eintrittsspalte eintritt. Es ist im Rahmen der Erfindung bevorzugt, dass quer zur Maschinenrichtung bzw. in CD-Breite der Vorrichtung eine gleichmäßige Zuströmung der Sekundärluft durch die Sekundärluft-Eintrittsspalte stattfindet und zwar nach einer Ausführungsvariante der Erfindung abgesehen von den vorgenannten Randbereichen zweckmäßigerweise im gesamten mittleren Bereich der Sekundärluft-Eintrittsspalte. Der Erfindung liegt insoweit die Erkenntnis zugrunde, dass damit eine besonders homogene Filamentablage erzielt werden kann bzw. eine sehr homogene Filamentablage über die CD-Breite erreicht werden kann.In the context of the invention, primary air means the process air which is passed through the drawing device and exits from the drawing device or from the drafting shaft of the drawing device into the diffuser. A very preferred embodiment of the invention is characterized in that in the region of the secondary air inlet column, the ratio of the volume flows of primary air and secondary air V P / V S is less than 5, preferably less than 4.8 and preferably less than 4.5. According to the recommended embodiment of the invention, the volume flow entering through the secondary air inlet column is the secondary air adjustable, preferably adjustable for each secondary air inlet gap and independently adjustable according to a variant embodiment. It is recommended that this is the cross section of the secondary air inlet column variable or adjustable. Expediently, the volume flow of secondary air entering through two secondary air inlet gaps arranged on opposite sides of the diffuser is equal to or substantially equal to or up to a maximum of 15%, in particular up to a maximum of 20% different. The vertical height of the secondary air inlet gaps is preferably 2 to 20 mm, preferably 3 to 18 mm and particularly preferably 5 to 15 mm. An embodiment of the invention is characterized in that the volume flow of the secondary air entering through the secondary air inlet gaps can be adjusted or varied over the CD width (transversely to the machine direction MD). For this purpose, the vertical height of the secondary air inlet gap is expediently set or changed over the CD width (transversely to the machine direction MD). The setting of the secondary air volume flows is recommended, provided that the volume flow of the incoming secondary air with respect to the CD direction to the edges of the device or to the edges of the secondary air inlet column decreases. Preferably, the secondary air volume flow entering through the secondary air inlet gaps is smaller only in the edge regions of the secondary air inlet gaps than in the central region of the secondary air inlet gaps. These margins are recommended to have a length of 5 to 20 cm. A maximum of 75%, preferably a maximum of 80%, of the secondary air volume flow which occurs in the central region of the secondary air inlet gap is expediently supplied in the edge regions. It is preferred within the scope of the invention that a uniform inflow of secondary air through the secondary air inlet gaps takes place transversely to the machine direction or in the CD width of the device, specifically according to one embodiment variant of the invention, apart from the The aforementioned edge regions expediently in the entire central region of the secondary air inlet column. Insofar as the invention is based on the recognition that a particularly homogeneous Filamentablage can be achieved or a very homogeneous Filamentablage can be achieved over the CD width.
Eine sehr empfohlene Ausführungsform der Erfindung zeichnet sich dadurch aus, dass in Filamentströmungsrichtung hinter bzw. unter den Sekundärlufteintrittsspalten ein konvergenter Abschnitt eines Diffusors bzw. des Diffusors anschließt. Ganz besonders bevorzugt ist dabei eine Ausführungsform, bei der in Filamentströmungsrichtung hinter bzw. unter den Sekundärluft-Eintrittsspalten zunächst ein konvergenter Abschnitt des Diffusors angeordnet ist, danach eine Engstelle des Diffusors anschließt und hinter bzw. unter der Engstelle ein divergenter Abschnitt des Diffusors vorgesehen ist (konvergent - Engstelle - divergent). In der Engstelle erfolgt gleichsam eine Kompaktierung der eingeströmten Sekundärluft bzw. des Primärluft-Sekundärluft-Gemisches. Eine präferierte Ausführungsform ist dadurch gekennzeichnet, dass der konvergente Abschnitt des Diffusors kürzer bzw. deutlich kürzer ausgeführt ist als der divergente Abschnitt des Diffusors. Zweckmäßigerweise beträgt die Länge IK des konvergenten Diffusorabschnittes maximal 75 %, vorzugsweise maximal 60 % und bevorzugt maximal 50 % der Länge ID des divergenten Abschnittes dieses Diffusors. Empfohlenermaßen beläuft sich die Länge IK des konvergenten Abschnittes des Diffusors auf maximal 40 %, vorzugsweise maximal 35 % und bevorzugt maximal 30 % der Länge ID des divergenten Diffusorabschnittes. Zweckmäßigerweise beträgt das Verhältnis IK/ID der Länge IK des konvergenten Diffusorabschnittes zur Länge ID des divergenten Diffusorabschnittes 0,1 bis 1 und bevorzugt 0,15 bis 0,9. Es empfiehlt sich, dass die Länge IK des konvergenten Diffusorabschnittes 5 bis 50 % und vorzugsweise 10 bis 50 % der Länge L des gesamten Diffusors beträgt.A highly recommended embodiment of the invention is characterized in that a convergent section of a diffuser or of the diffuser adjoins in the filament flow direction behind or below the secondary air inlet gaps. Very particular preference is given to an embodiment in which a convergent section of the diffuser is initially arranged in the filament flow direction behind or below the secondary air inlet gaps, then adjoins a constriction of the diffuser and a divergent section of the diffuser is provided behind or under the constriction ( convergent - bottleneck - divergent). In the bottleneck as it compacts the inflowed secondary air or the primary air-secondary air mixture. A preferred embodiment is characterized in that the convergent section of the diffuser is made shorter or significantly shorter than the divergent section of the diffuser. Advantageously, the length I K of the convergent diffuser section is at most 75%, preferably at most 60% and preferably at most 50% of the length I D of the divergent section of this diffuser. It is recommended that the length I K of the convergent section of the diffuser amounts to a maximum of 40%, preferably a maximum of 35% and preferably a maximum of 30% of the length I D of the divergent diffuser section. The ratio I K / I D of the length I K of the convergent diffuser section to the length I D of the divergent diffuser section is expediently 0.1 to 1 and preferably 0.15 to 0.9. It is recommended that the length I K of the convergent diffuser section is 5 to 50% and preferably 10 to 50% of the length L of the entire diffuser.
Es liegt im Rahmen der Erfindung, dass der Diffusoraustrittswinkel β des Diffusoraustrittes - bzw. des letzten in Filamentströmungsrichtung über der Ablageeinrichtung angeordneten Diffusorabschnittes - maximal 30°, bevorzugt maximal 25° und sehr bevorzugt maximal 20° beträgt. Der Diffusoraustrittswinkel β wird dabei zwischen einer Diffusorwand des divergenten Diffusorabschnittes und der Längsmittelachse M des Diffusors gemessen. Vorzugsweise sind die Diffusorwände des den Diffusoraustritt bildenden divergenten Diffusorabschnittes verschwenkbar ausgebildet, so dass der Diffusoraustrittswinkel β variierbar bzw. einstellbar ist. - Empfohlenermaßen beträgt die Breite B des Diffusoraustrittes des divergenten Diffusorabschnittes maximal 300 %, vorzugsweise maximal 250 % und bevorzugt maximal 200 % der Breite VB des Austrittsspaltes der Verstreckvorrichtung bzw. des Verstreckschachtes der Verstreckvorrichtung. - Eine besonders bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass der Abstand des Diffusors bzw. der Unterkante - insbesondere der untersten Unterkante - des Diffusors zur Ablageeinrichtung bzw. zum Ablagesiebband 20 bis 300 mm, insbesondere 30 bis 150 mm und bevorzugt 30 bis 120 mm beträgt.It is within the scope of the invention that the diffuser exit angle β of the diffuser outlet - or of the last diffuser section arranged in the filament flow direction over the depositing device - is at most 30 °, preferably at most 25 ° and very preferably at most 20 °. The diffuser exit angle β is measured between a diffuser wall of the divergent diffuser section and the longitudinal center axis M of the diffuser. Preferably, the diffuser walls of the diffuser outlet forming divergent diffuser section are formed pivotable, so that the diffuser exit angle β is variable or adjustable. It is recommended that the width B of the diffuser outlet of the divergent diffuser section is at most 300%, preferably at most 250% and preferably at most 200% of the width V B of the exit slit of the drawing device or of the drawing shaft of the drawing device. - A particularly preferred embodiment of the invention is characterized in that the distance of the diffuser or the lower edge - in particular the lowermost lower edge - of the diffuser to the storage device or the
Es liegt im Rahmen der Erfindung, dass zwischen der Spinnerette und der Kühlvorrichtung eine Monomerabsaugungsvorrichtung angeordnet ist. Mit dieser Monomerabsaugungsvorrichtung wird Luft aus dem Filamentbildungsraum unterhalb der Spinnerette abgesaugt. Dadurch können die neben den Endlosfilamenten austretenden Gase wie Monomere, Oligomere, Zersetzungsprodukte und dergleichen aus der erfindungsgemäßen Vorrichtung entfernt werden. Die Monomerabsaugungsvorrichtung weist zweckmäßigerweise zumindest eine Absaugungskammer auf, an die bevorzugt zumindest ein Absaugungsgebläse angeschlossen ist. Die zumindest eine Absaugungskammer ist zum Filamentbildungsraum hin mit zumindest einem Absaugungsschlitz für die Absaugung der genannten Gase versehen. Zu einer besonders effektiven Lösung des technischen Problems trägt weiterhin eine bevorzugte Ausführungsform der Erfindung bei, die dadurch gekennzeichnet ist, dass zwischen der Spinnerette und der Monomerabsaugungsvorrichtung zumindest eine erste deformierbare Dichtung zur Abdichtung eines zwischen der Spinnerette und der Monomerabsaugungsvorrichtung ausgebildeten ersten Spaltes angeordnet ist und/oder wobei zwischen der Monomerabsaugungsvorrichtung und der Kühlvorrichtung zumindest eine zweite deformierbare Dichtung zur Abdichtung eines zwischen der Monomerabsaugungsvorrichtung und der Kühlvorrichtung ausgebildeten zweiten Spaltes vorgesehen ist und/oder wobei zwischen der Kühlvorrichtung und der Verstreckvorrichtung bzw. einem Zwischenkanal der Verstreckvorrichtung zumindest eine dritte deformierbare Dichtung zur Abdichtung eines zwischen der Kühlvorrichtung und der Verstreckvorrichtung bzw. dem Zwischenkanal ausgebildeten dritten Spaltes angeordnet ist. Vorzugsweise sind die Anlageeigenschaften, insbesondere die Anpresskraft bzw. der Anpressdruck einer solchen deformierbaren Dichtung bezüglich der Begrenzungsbereiche bzw. Begrenzungsflächen des jeweiligen Spaltes variierbar bzw. nachstellbar. Eine derartige bevorzugte deformierbare Dichtung erstreckt sich empfohlenermaßen über die gesamte Breite bzw. über die gesamte CD-Breite (quer zur Maschinenrichtung) der erfindungsgemäßen Vorrichtung. Es liegt im Rahmen der Erfindung, dass eine solche deformierbare Dichtung über den gesamten Umfang bzw. im Wesentlichen über den gesamten Umfang des Filamentströmungskanals umläuft. Es liegt fernerhin im Rahmen der Erfindung, dass die Höhe h eines mit einer deformierbaren Dichtung abzudichtenden Spaltes 3 bis 35 mm, insbesondere 5 bis 30 mm beträgt und dass die zumindest eine deformierbare Dichtung über diese Höhe h des Spaltes abdichtet. Zweckmäßigerweise sind Ungleichmäßigkeiten bezüglich der Höhe h des Spaltes durch Variation bzw. Nachstellung der Anlageeigenschaften der Dichtung in dieser Höhenrichtung ausgleichbar. Es empfiehlt sich, dass die Dichtung mit einem fluiden Medium befüllbar ist bzw. gefüllt ist und dass die Nachstellung bzw. Einstellung der Dichtung durch Einbringen des fluiden Mediums in die Dichtung bzw. durch Ausbringen des fluiden Mediums aus der Dichtung erfolgt. Vorzugsweise ist die zumindest eine deformierbare Dichtung eine aufblasbare Dichtung. Nach einer anderen Ausführungsvariante kann die deformierbare Dichtung auch zumindest ein mittels zumindest eines Federelementes an eine Begrenzungsfläche des abzudichtenden Spaltes angepresstes Dichtelement aufweisen. Bei dem Dichtelement kann es sich insbesondere um eine Dichtlippe und bei der Dichtung somit um eine federbeaufschlagte Dichtlippe handeln. Das Federelement ist dann zweckmäßigerweise an einer Begrenzungsfläche des abzudichtenden Spaltes fixiert und presst das Dichtelement bzw. die Dichtlippe an die gegenüberliegende Begrenzungsfläche des Spaltes. - Bevorzugt ist die zumindest eine deformierbare Dichtung mit der Maßgabe eingerichtet, dass eine Abdichtung bei einem Druck im Filamentströmungskanal von mehr als 2.000 Pa, insbesondere von mehr als 2.500 Pa erfolgt. Die Ausführungsform mit der deformierbaren Dichtung hat sich im Rahmen der erfindungsgemäßen Lehre besonders bewährt. In Kombination mit den übrigen erfindungsgemäßen bzw. bevorzugten Merkmalen der erfindungsgemäßen Vorrichtung ergeben sich optimale aerodynamische Verhältnisse in der Vorrichtung, die effektiv zur Lösung des erfindungsgemäßen technischen Problems beitragen.It is within the scope of the invention that a monomer suction device is arranged between the spinnerette and the cooling device. With this Monomerabsaugungsvorrichtung air is sucked from the Filamentbildungsraum below the spinnerette. As a result, the gases exiting the continuous filaments, such as monomers, oligomers, decomposition products and the like, can be removed from the device according to the invention. The Monomerabsaugungsvorrichtung expediently has at least one suction chamber, to which preferably at least one suction fan is connected. The at least one suction chamber is toward the filament-forming space with at least one suction slot provided for the extraction of said gases. A particularly effective solution to the technical problem is further provided by a preferred embodiment of the invention, characterized in that at least a first deformable seal is arranged between the spinnerette and the monomer suction device for sealing a first gap formed between the spinnerette and the monomer suction device, and / or wherein at least one second deformable seal for sealing a second gap formed between the monomer suction device and the cooling device is provided between the monomer suction device and the cooling device and / or at least one third deformable seal for sealing between the cooling device and the drawing device or an intermediate channel of the drawing device a arranged between the cooling device and the drawing device or the intermediate channel third gap is arranged. Preferably, the system properties, in particular the contact pressure or the contact pressure of such a deformable seal with respect to the boundary areas or boundary surfaces of the respective gap are variable or adjustable. Such a preferred deformable seal extends recommended over the entire width or over the entire CD width (transverse to the machine direction) of the device according to the invention. It is within the scope of the invention that such a deformable seal rotates over the entire circumference or substantially over the entire circumference of the filament flow passage. It is further within the scope of the invention that the height h of a gap to be sealed with a deformable seal is 3 to 35 mm, in particular 5 to 30 mm, and that the at least one deformable seal seals over this height h of the gap. Expediently, irregularities with respect to the height h of the gap can be compensated for by variation or adjustment of the system properties of the seal in this height direction. It It is recommended that the seal with a fluid medium is filled or filled and that the adjustment or adjustment of the seal by introducing the fluid medium into the seal or by discharging the fluid medium from the seal. Preferably, the at least one deformable seal is an inflatable seal. According to another embodiment, the deformable seal may also have at least one by means of at least one spring element to a boundary surface of the gap to be sealed pressed sealing element. The sealing element may in particular be a sealing lip and thus a spring-loaded sealing lip in the case of the seal. The spring element is then expediently fixed to a boundary surface of the gap to be sealed and presses the sealing element or the sealing lip against the opposite boundary surface of the gap. Preferably, the at least one deformable seal is designed with the proviso that sealing takes place at a pressure in the filament flow channel of more than 2,000 Pa, in particular of more than 2,500 Pa. The embodiment with the deformable seal has proven particularly useful in the context of the teaching according to the invention. In combination with the other inventive or preferred features of the device according to the invention optimum aerodynamic conditions in the device, which effectively contribute to solving the technical problem of the invention.
Der Erfindung liegt die Erkenntnis zugrunde, dass mit der erfindungsgemäßen Vorrichtung Vliesbahnen bzw. Spinnvliese von hervorragender Qualität erzeugt werden können. Vor allem kann mit Hilfe der erfindungsgemäßen Lehre eine homogene Filamentablage und somit eine homogene Vliesbahn sowohl in Maschinenrichtung als auch quer zur Maschinenrichtung hergestellt werden. Eine optimale homogene Vliesablage lässt sich vor allem auch bei höheren bzw. bei hohen Produktionsgeschwindigkeiten erzielen. Mit der erfindungsgemäßen Vorrichtung sind hohe Filamentgeschwindigkeiten und somit geringe Titer der Filamente realisierbar, bei nichtsdestoweniger guter homogener Filamentablage. Hohe Filamentgeschwindigkeiten und geringe Titer lassen sich problemlos bei hohen Durchsätzen bzw. Produktionsgeschwindigkeiten von beispielsweise mehr als 400 m/min erreichen. Zu betonen ist, dass die erfindungsgemäße Vorrichtung nichtsdestoweniger relativ einfach und wenig aufwendig bzw. komplex aufgebaut ist.The invention is based on the finding that with the device according to the invention nonwoven webs or spunbonded nonwovens of excellent quality can be produced. Above all, with the aid of the teaching according to the invention, a homogeneous filament deposit and thus a homogeneous nonwoven web can be produced both in the machine direction and also transversely to the machine direction. An optimal homogeneous nonwoven storage can be achieved especially at higher or at high production speeds. With the invention Device are high filament speeds and thus low titers of the filaments feasible, nevertheless good homogeneous filament deposition. High filament speeds and low titers can be achieved without difficulty at high throughputs or production speeds of, for example, more than 400 m / min. It should be emphasized that the device according to the invention is nonetheless relatively simple and of little complexity.
Nachfolgend wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen in schematischer Darstellung:
- Fig. 1
- einen Vertikalschnitt durch eine erfindungsgemäße Vorrichtung und
- Fig. 2
- einen vergrößerten Ausschnitt A des unteren Bereichs der erfindungsgemäßen Vorrichtung aus
Fig. 1 .
- Fig. 1
- a vertical section through a device according to the invention and
- Fig. 2
- an enlarged section A of the lower portion of the device according to the invention from
Fig. 1 ,
Die Figuren zeigen eine erfindungsgemäße Vorrichtung zur Herstellung von Spinnvliesen aus Endlosfilamenten 1, insbesondere aus Endlosfilamenten 1 aus thermoplastischem Kunststoff. Die Vorrichtung weist eine Spinnerette 2 zum Erspinnen der Endlosfilamente 1 auf sowie eine Kühlvorrichtung 3 zur Kühlung der Filamente. Zwischen der Spinnerette 2 und der Kühlvorrichtung 3 ist nach besonders bevorzugter Ausführungsform der Erfindung eine Monomerabsaugungsvorrichtung 4 angeordnet. Mit dieser Monomerabsaugungsvorrichtung 4 können beim Spinnprozess auftretende störende Gase aus der Vorrichtung entfernt werden. Dabei kann es sich beispielsweise um Monomere, Oligomere bzw. Zersetzungsprodukte und dergleichen Substanzen handeln. Zwischen der Monomerabsaugungsvorrichtung 4 und der Kühlvorrichtung 3 ist ein Spalt 5 ausgebildet, der in der Regel um den gesamten Filamentbildungsraum bzw. Filamentströmungsraum umläuft. Nach sehr bevorzugter Ausführungsform und im Ausführungsbeispiel nach den Figuren (siehe insbesondere
Im Ausführungsbeispiel (s. insbesondere
Der Kühlvorrichtung 3 ist in Filamentströmungsrichtung FS eine Verstreckvorrichtung 7 zum Verstrecken der Filamente 1 nachgeschaltet. Vorzugsweise und im Ausführungsbeispiel schließt an die Kühlvorrichtung 3 ein Zwischenkanal 8 an, der die Kühlvorrichtung 3 mit einem Verstreckschacht 9 der Verstreckvorrichtung 7 verbindet. Nach bevorzugter Ausführungsform und im Ausführungsbeispiel ist das Aggregat aus der Kühlvorrichtung 3 und der Verstreckvorrichtung 7 bzw. das Aggregat aus der Kühlvorrichtung 3, dem Zwischenkanal 8 und dem Verstreckschacht 9 als geschlossenes System ausgebildet. Außer der Zufuhr von Kühlluft in der Kühlvorrichtung 3 erfolgt keine weitere Luftzufuhr in dieses Aggregat. Die durch die Verstreckvorrichtung 7 bzw. durch den Verstreckschacht 9 geführte Luft wird hier und nachfolgend als Primärluft P bezeichnet.The
Erfindungsgemäß schließt an die Verstreckvorrichtung 7 in Filamentströmungsrichtung FS zumindest ein Diffusor 10. Vorzugsweise und im Ausführungsbeispiel sind zwischen Verstreckvorrichtung 7 bzw. zwischen Verstreckschacht 9 und dem Diffusor 10 zwei gegenüberliegende Sekundärluft-Eintrittsspalte 11, 12 für die Einführung von Sekundärluft S angeordnet. Zweckmäßigerweise erstrecken sich die Sekundärluft-Eintrittsspalte 11, 12 über die gesamte Breite bzw. CD-Breite der erfindungsgemäßen Vorrichtung. Erfindungsgemäß wird die Sekundärluft durch die Sekundärluft-Eintrittsspalte mit einem Zuströmwinkel α zugeführt, der kleiner als 100°, zweckmäßigerweise kleiner oder gleich 90°, vorzugsweise kleiner als 80° und im Ausführungsbeispiel kleiner als 45° ist. Gemäß sehr empfohlener Ausführungsform der Erfindung liegt der Zuströmwinkel α zwischen 0 und 60°, bevorzugt zwischen 2 und 50°. Zur Realisierung des Zuströmwinkels α sind im Ausführungsbeispiel (siehe insbesondere
Gemäß besonders empfohlener Ausführungsform der Erfindung kann der durch die Sekundärluft-Eintrittsspalte 11, 12 zugeführte Volumenstrom an Sekundärluft eingestellt werden. Dies kann insbesondere durch Einstellung der Querschnitte der Sekundärluft-Eintrittsspalte 11, 12 realisiert werden. Grundsätzlich können für die beiden gegenüberliegenden Sekundärluft-Eintrittsspalte 11, 12 auch unterschiedliche Volumenströme an zugeführter Sekundärluft S eingestellt werden. Nach einer Ausführungsform der Erfindung kann der durch die Sekundärluft-Eintrittsspalte 11, 12 einströmende Sekundärluft-Volumenstrom - vorzugsweise bezüglich jedes Sekundärluft-Eintrittsspaltes 11, 12 - quer zur Maschinenrichtung bzw. über die CD-Breite eingestellt bzw. variiert werden. Dabei ist zweckmäßigerweise der zugeführte Sekundärluft-Volumenstrom in den Randbereichen der Vorrichtung bzw. der Sekundärluft-Eintrittsspalte 11, 12 unterschiedlich im Vergleich zum mittleren Bereich der Vorrichtung bzw. zum mittleren Bereich der Sekundärluft-Eintrittsspalte 11, 12.According to a particularly recommended embodiment of the invention, the volume flow of secondary air supplied through the secondary
Aufgrund des Eintritts der Sekundärluft S durch die Sekundärluft-Eintrittsspalte 11, 12 wird im anschließenden Diffusor 10 Primärluft P mit Sekundärluft S gemischt. Gemäß bevorzugter Ausführungsform der Erfindung ist im Bereich der Sekundärluft-Eintrittsspalte 11, 12 das Verhältnis der Volumenströme von Primärluft und Sekundärluft VP/VS kleiner als 5 und vorzugsweise kleiner als 4,5.Due to the entry of the secondary air S through the secondary
Im Ausführungsbeispiel nach den Figuren ist lediglich ein Diffusor 10 in Filamentströmungsrichtung FS unterhalb der Verstreckvorrichtung 7 vorhanden. Grundsätzlich können auch zwei oder mehr Diffusoren 10 hintereinander geschaltet sein. Der im Ausführungsbeispiel nach den Figuren vorgesehene Diffusor 10 weist nach bevorzugter Ausführungsform in Filamentströmungsrichtung FS hinter bzw. unter den Sekundärluft-Eintrittsspalten 11, 12 einen konvergenten Diffusorabschnitt 15 auf. An diesen konvergenten Diffusorabschnitt 15 schließt bevorzugt und im Ausführungsbeispiel eine Engstelle 16 des Diffusors 10 an. In Filamentströmungsrichtung FS hinter bzw. unter der Engstelle 16 ist der Diffusor 10 vorzugsweise und im Ausführungsbeispiel mit einem divergenten Diffusorabschnitt 17 ausgestattet. Empfohlenermaßen und im Ausführungsbeispiel ist der divergente Diffusorabschnitt 17 des Diffusors 10 in Filamentströmungsrichtung FS länger bzw. deutlich länger als der konvergente Diffusorabschnitt 15. Bevorzugt und im Ausführungsbeispiel beträgt die Länge IK des konvergenten Diffusorabschnittes 15 weniger als 50 % der Länge ID des divergenten Diffusorabschnittes 17.In the embodiment according to the figures, only a
Empfohlenermaßen und im Ausführungsbeispiel beträgt der Diffusoraustrittswinkel β zwischen einer Diffusorwand 18 des divergenten Diffusorabschnittes 17 und der Längsmittelachse M des Diffusors 10 maximal 25°. Zweckmäßigerweise und im Ausführungsbeispiel beträgt die Breite B des Diffusoraustrittes 19 maximal 300 %, vorzugsweise maximal 250 % der Breite VB des Austrittsspaltes 20 des Verstreckschachtes 9.Empfohlenermaßen and in the embodiment, the diffuser exit angle β between a
Die aus dem Diffusor 10 austretenden Endlosfilamente 1 werden auf einer als Ablagesiebband 21 ausgebildeten Ablageeinrichtung zur Filamentablage bzw. zur Vliesbahn 22 abgelegt. Die Filamentablage bzw. Vliesbahn 22 wird dann mit dem Ablagesiebband 21 in Maschinenrichtung MD abgefördert bzw. abtransportiert. Erfindungsgemäß ist eine Absaugungseinrichtung zum Absaugen von Luft bzw. Prozessluft durch die Ablageeinrichtung bzw. durch das Ablagesiebband 21 vorgesehen. Dazu ist unterhalb des Diffusoraustrittes 19 ein Absaugbereich 23 angeordnet, der eine Breite b in Maschinenrichtung (MD) aufweist. Diese Breite b des Absaugbereiches 23 ist erfindungsgemäß größer als die Breite B des Diffusoraustrittes 19. In der
Der unter dem Ablagesiebband 21 angeordnete Absaugbereich 23 wird durch zwei in Maschinenrichtung MD hintereinander angeordnete Trennwände 27, 28 begrenzt. Die Breite b des Absaugbereiches 23 wird als Abstand zwischen den beiden Trennwänden 27, 28 gemessen und zwar insbesondere als Abstand der oberen Enden der beiden Trennwände 27, 28. Insbesondere aus der
Insbesondere aufgrund der erfindungsgemäßen Ausgestaltung des Absaugbereiches 23 erfolgt die Absaugung durch das Ablagesiebband 21 mit der Maßgabe, dass im Bereich des Diffusoraustritts 19 Tertiärluft T entlang der äußeren Oberflächen 26 in Richtung Ablagesiebband 21 strömt. Nach besonders bevorzugter Ausführungsform sind die Ströme der Tertiärluft T dabei parallel bzw. im Wesentlichen parallel zu dem in Richtung Diffusoraustritt 19 des Diffusors 10 strömenden Mischstromes aus Primärluft P und Sekundärluft S ausgerichtet. Somit wird nach sehr bevorzugter Ausführungsform der Erfindung durch das Ablagesiebband 21 Primärluft P und Sekundärluft S sowie auch Tertiärluft T gesaugt. Zweckmäßigerweise strömen dabei die Ströme von Primärluft P, Sekundärluft S und Tertiärluft T parallel bzw. quasi parallel durch das Ablagesiebband 21.In particular, due to the inventive design of the
Claims (13)
wobei zwischen der Verstreckvorrichtung (7) und der Ablageeinrichtung bzw. dem Ablagesiebband (21) zumindest ein Diffusor (10) angeordnet ist, so dass Filamente und Primärluft aus der Verstreckvorrichtung in den Diffusor (10) gelangen, wobei im Bereich des zumindest einen Diffusors (10) zumindest zwei an gegenüberliegenden Seiten des Diffusors (10) angeordnete Sekundärluft-Eintrittsspalte (11, 12) vorgesehen sind, durch die Sekundärluft in den Diffusor (10) gelangt,
wobei zumindest ein Sekundärluft-Eintrittsspalt (11, 12), vorzugsweise zumindest zwei Sekundärluft-Eintrittsspalte (11, 12) mit der Maßgabe ausgebildet sind, dass die Sekundärluft in einem Zuströmwinkel α zur Filamentströmungsrichtung FS bzw. zur Längsmittelebene M der Vorrichtung bzw. des Diffusors (10) einströmt, wobei dieser Zuströmwinkel α kleiner als 100°, zweckmäßigerweise kleiner oder gleich 90°, vorzugsweise kleiner als 80°, bevorzugt kleiner als 70° und insbesondere kleiner als 65° ist,
wobei der in Filamentströmungsrichtung letzte Diffusorabschnitt zur Ablageeinrichtung hin divergierende Diffusorwände (18) aufweist, wobei diese Diffusorwände (18) einen Diffusoraustritt (19) mit einer Breite B in Maschinenrichtung (MD) bilden,
wobei zumindest eine Absaugungseinrichtung zum Absaugen von Luft bzw. Prozessluft durch die Ablageeinrichtung bzw. durch das Ablagesiebband (21) vorgesehen ist und wobei ein unterhalb des Diffusoraustrittes (19) angeordneter Absaugbereich (23) eine Breite b in Maschinenrichtung aufweist, die größer ist als die Breite B des Diffusoraustrittes (19).Apparatus for producing spunbonded nonwovens of endless filaments (1), in particular of thermoplastic material, with at least one spinnerette (2) for spinning the continuous filaments (1), at least one cooling device (3) for cooling the filaments, at least one stretching device (7) for drawing the filaments and at least one depositing device, in particular in the form of a filing screen belt (21) for depositing the filaments to the nonwoven web,
wherein at least one diffuser (10) is arranged between the drawing device (7) and the depositing device or the filing belt (21) so that filaments and primary air pass from the drawing device into the diffuser (10), wherein in the area of the at least one diffuser ( 10) at least two on opposite sides of the diffuser (10) arranged secondary air inlet gaps (11, 12) are provided, passes through the secondary air into the diffuser (10),
wherein at least one secondary air inlet gap (11, 12), preferably at least two secondary air inlet gaps (11, 12) are formed with the proviso that the secondary air in an inflow angle α to the filament flow direction FS and the longitudinal center plane M of the device or the diffuser (10) flows in, wherein this inflow angle α is less than 100 °, expediently less than or equal to 90 °, preferably less than 80 °, preferably less than 70 ° and in particular less than 65 °,
wherein the last in the filament flow direction diffuser section to the storage device towards diverging diffuser walls (18), said diffuser walls (18) form a diffuser exit (19) with a width B in the machine direction (MD),
wherein at least one suction device for extracting air or process air through the depositing device or through the Ablagesiebband (21) is provided and wherein a below the diffuser outlet (19) arranged suction region (23) has a width b in the machine direction, which is greater than that Width B of the diffuser outlet (19).
Priority Applications (21)
Application Number | Priority Date | Filing Date | Title |
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PL17164375T PL3382081T3 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of woven material from continuous filaments |
ES17164375T ES2751161T3 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of continuous filament woven material |
SI201730134T SI3382081T1 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of woven material from continuous filaments |
JOP/2018/0032A JO3481B1 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of woven material from continuous filaments |
DK17164375T DK3382081T3 (en) | 2017-03-31 | 2017-03-31 | Apparatus for making filter cloths of endless filaments |
EP17164375.2A EP3382081B1 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of woven material from continuous filaments |
CA2997488A CA2997488C (en) | 2017-03-31 | 2018-03-06 | Device for producing spunbonds from endless filaments |
ZA2018/01818A ZA201801818B (en) | 2017-03-31 | 2018-03-19 | Device for producing spunbonds from endless filaments |
CONC2018/0003214A CO2018003214A1 (en) | 2017-03-31 | 2018-03-23 | Device for the manufacture of nonwoven textiles of endless filaments |
MX2018003621A MX2018003621A (en) | 2017-03-31 | 2018-03-23 | Apparatus for making spunbond from continuous filaments. |
MYPI2018701192A MY191354A (en) | 2017-03-31 | 2018-03-26 | Device for the manufacture of woven material from continuous filaments |
KR1020180035044A KR102213092B1 (en) | 2017-03-31 | 2018-03-27 | Device for producing spunbonds from endless filaments |
ARP180100736A AR111445A1 (en) | 2017-03-31 | 2018-03-27 | DEVICE FOR THE MANUFACTURE OF NON-WOVEN TEXTILES OF ENDLESS FILAMENTS |
SA118390477A SA118390477B1 (en) | 2017-03-31 | 2018-03-28 | Apparatus for producing spunbonds from continuous filaments |
RU2018111083A RU2704908C2 (en) | 2017-03-31 | 2018-03-28 | Device for production of spunbond nonwoven materials from filaments |
BR102018006571-8A BR102018006571B1 (en) | 2017-03-31 | 2018-03-29 | DEVICE FOR MANUFACTURING CONTINUOUS FILAMENT NON-WOVEN FABRICS FROM CONTINUOUS FILAMENTS |
JP2018063809A JP6851341B2 (en) | 2017-03-31 | 2018-03-29 | Equipment for producing spunbonded non-woven fabrics from endless filaments |
US15/939,753 US20180282926A1 (en) | 2017-03-31 | 2018-03-29 | Apparatus for making spunbond from continuous filaments |
CN201810295003.0A CN108691097B (en) | 2017-03-31 | 2018-03-30 | Apparatus for producing spunbonded fabric from filaments |
US17/154,198 US11603614B2 (en) | 2017-03-31 | 2021-01-21 | Apparatus for making spunbond |
US18/118,377 US20230203729A1 (en) | 2017-03-31 | 2023-03-07 | Apparatus for making spunbond |
Applications Claiming Priority (1)
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EP17164375.2A EP3382081B1 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of woven material from continuous filaments |
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EP3382081A1 true EP3382081A1 (en) | 2018-10-03 |
EP3382081B1 EP3382081B1 (en) | 2019-08-28 |
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US (1) | US20180282926A1 (en) |
EP (1) | EP3382081B1 (en) |
JP (1) | JP6851341B2 (en) |
KR (1) | KR102213092B1 (en) |
CN (1) | CN108691097B (en) |
AR (1) | AR111445A1 (en) |
CA (1) | CA2997488C (en) |
CO (1) | CO2018003214A1 (en) |
DK (1) | DK3382081T3 (en) |
ES (1) | ES2751161T3 (en) |
JO (1) | JO3481B1 (en) |
MX (1) | MX2018003621A (en) |
MY (1) | MY191354A (en) |
PL (1) | PL3382081T3 (en) |
RU (1) | RU2704908C2 (en) |
SA (1) | SA118390477B1 (en) |
SI (1) | SI3382081T1 (en) |
ZA (1) | ZA201801818B (en) |
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US11697898B2 (en) * | 2017-03-10 | 2023-07-11 | Biome Bioplastics Limited | Fabric |
ES2886885T3 (en) * | 2019-07-30 | 2021-12-21 | Reifenhaeuser Masch | Device and method for the manufacture of a nonwoven material from fibers |
CN111155240B (en) * | 2020-01-22 | 2024-07-16 | 宏大研究院有限公司 | Tangential air supplementing device for spunbonded non-woven fabric equipment |
CN112458557B (en) * | 2020-10-19 | 2022-01-18 | 福建智罗科技有限公司 | Melt-blowing machine and method for preparing composite cloth based on melt-blowing machine |
CN112609332B (en) * | 2020-11-20 | 2023-09-12 | 滁州天鼎丰非织造布有限公司 | Air suction interface device under net forming and non-woven fabric production system |
CN116695266B (en) * | 2023-08-09 | 2023-11-17 | 江苏新视界先进功能纤维创新中心有限公司 | Air draft system, device comprising same and application |
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2017
- 2017-03-31 PL PL17164375T patent/PL3382081T3/en unknown
- 2017-03-31 JO JOP/2018/0032A patent/JO3481B1/en active
- 2017-03-31 DK DK17164375T patent/DK3382081T3/en active
- 2017-03-31 EP EP17164375.2A patent/EP3382081B1/en active Active
- 2017-03-31 SI SI201730134T patent/SI3382081T1/en unknown
- 2017-03-31 ES ES17164375T patent/ES2751161T3/en active Active
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2018
- 2018-03-06 CA CA2997488A patent/CA2997488C/en active Active
- 2018-03-19 ZA ZA2018/01818A patent/ZA201801818B/en unknown
- 2018-03-23 MX MX2018003621A patent/MX2018003621A/en unknown
- 2018-03-23 CO CONC2018/0003214A patent/CO2018003214A1/en unknown
- 2018-03-26 MY MYPI2018701192A patent/MY191354A/en unknown
- 2018-03-27 AR ARP180100736A patent/AR111445A1/en active IP Right Grant
- 2018-03-27 KR KR1020180035044A patent/KR102213092B1/en active IP Right Grant
- 2018-03-28 SA SA118390477A patent/SA118390477B1/en unknown
- 2018-03-28 RU RU2018111083A patent/RU2704908C2/en active
- 2018-03-29 US US15/939,753 patent/US20180282926A1/en not_active Abandoned
- 2018-03-29 JP JP2018063809A patent/JP6851341B2/en active Active
- 2018-03-30 CN CN201810295003.0A patent/CN108691097B/en active Active
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DE19521466A1 (en) * | 1995-06-13 | 1996-12-19 | Reifenhaeuser Masch | Diffuser for air laying of direct melt spun non=woven batt |
EP1630265A1 (en) * | 2004-08-20 | 2006-03-01 | Reifenhäuser GmbH & Co. Maschinenfabrik | Apparatus for the continuous production of a spunbonded web |
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Also Published As
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ZA201801818B (en) | 2019-01-30 |
SI3382081T1 (en) | 2020-01-31 |
JP2018172841A (en) | 2018-11-08 |
SA118390477B1 (en) | 2021-11-23 |
CN108691097B (en) | 2021-10-29 |
KR102213092B1 (en) | 2021-02-04 |
RU2018111083A3 (en) | 2019-10-02 |
RU2704908C2 (en) | 2019-10-31 |
US20180282926A1 (en) | 2018-10-04 |
MY191354A (en) | 2022-06-18 |
JP6851341B2 (en) | 2021-03-31 |
AR111445A1 (en) | 2019-07-17 |
JOP20180032A1 (en) | 2019-01-30 |
ES2751161T3 (en) | 2020-03-30 |
PL3382081T3 (en) | 2020-03-31 |
CO2018003214A1 (en) | 2019-03-29 |
RU2018111083A (en) | 2019-10-02 |
DK3382081T3 (en) | 2019-11-11 |
CA2997488C (en) | 2021-04-06 |
MX2018003621A (en) | 2018-11-22 |
CN108691097A (en) | 2018-10-23 |
BR102018006571A2 (en) | 2018-11-21 |
JO3481B1 (en) | 2020-07-05 |
EP3382081B1 (en) | 2019-08-28 |
CA2997488A1 (en) | 2018-09-30 |
KR20180111576A (en) | 2018-10-11 |
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