CA2997488A1 - Device for producing spunbonds from endless filaments - Google Patents
Device for producing spunbonds from endless filamentsInfo
- Publication number
- CA2997488A1 CA2997488A1 CA2997488A CA2997488A CA2997488A1 CA 2997488 A1 CA2997488 A1 CA 2997488A1 CA 2997488 A CA2997488 A CA 2997488A CA 2997488 A CA2997488 A CA 2997488A CA 2997488 A1 CA2997488 A1 CA 2997488A1
- Authority
- CA
- Canada
- Prior art keywords
- diffusor
- secondary air
- depositing
- extraction
- filaments
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—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
- 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
- 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
- D04H17/00—Felting apparatus
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- 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
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- 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
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention relates to a device for producing spunbonds from endless filaments, comprising at least one spinneret, at least one cooling device, at least one stretching device and comprising at least one depositing device for depositing the filaments. At least one diffusor is arranged between the stretching device and the depositing device so that filaments and primary air from the stretching device enter into the diffusor. In the region of the at least one diffusor at least two secondary air inlet gaps arranged on opposite sides of the diffusor are provided. At least one secondary air inlet gap is formed with the proviso that the secondary air flows in at an angle a with respect to the filament flow direction FS, wherein the inflow angle a is less than 100°. An extraction device for extracting air through the depositing device. An extraction region arranged underneath the diffusor outlet has a width b in the machine direction which is greater than the width B of the diffusor outlet.
Description
Device for producing spunbonds from endless filaments Description:
The invention relates to a device for producing spunbonds from endless filaments, in particular endless filaments of thermoplastic material, comprising at least one spinneret for spinning the endless filaments, at least one cooling device for cooling the filaments, at least one stretching device for stretching the filaments and comprising at least one depositing device for depositing the filaments to form a nonwoven web. Endless filaments means within the scope of the invention filaments having almost endless length. These endless filaments differ in this respect from staple fibres which have much shorter lengths of for example 10 to 60 mm.
Devices of the type mentioned initially are fundamentally known from practice in various embodiments. These devices are also known as spunbond devices.
Many of the devices of this type known from practice have the disadvantage that at high filament speeds and high throughputs or production rates, the quality of the filament deposition leaves something to be desired. This particularly relates to the homogeneity of the deposition and the strength of the nonwoven webs produced. High filament speeds and low titres of the product endless filaments can frequently only be achieved with significant loss of quality of the nonwoven webs produced. The known devices are therefore capable of improvement in this respect.
Accordingly, the invention is based on the technical problem of providing a device of the type mentioned initially in which high filament speeds and low titres as well as high production rates can be achieved and nevertheless, the quality of the filament deposition or the nonwoven web produced meets all the requirements.
In order to solve this technical problem, the invention teaches a device for producing spunbonds from endless filaments, in particular from thermoplastic material, comprising at least one spinneret for spinning the endless filaments, at least one cooling device for cooling the filaments, at least one stretching device for stretching the filaments and comprising at least one depositing device, in - particular in the form of a depositing foraminous belt, for depositing the filaments to form the nonwoven web, wherein at least one diffusor is arranged between the stretching device and the depositing device or the depositing foraminous belt so that filaments and primary air from the stretching device enter into the diffusor, wherein in the region of the at least one diffusor at least two secondary air inlet gaps arranged on opposite sides of the diffusor are provided through which the secondary air enters into the diffusor, 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 at an inflow angle a with respect to the filament flow direction FS or with respect to the longitudinal central plane M of the device or the diffusor, wherein this inflow angle a is less than 1000, expediently less than or equal to 90 , preferably less than 80 , preferably less than 70 and particularly preferably less than 65 , wherein the last diffusor section in the filament flow direction FS has diffusor walls which diverge towards the depositing device, wherein these diffusor walls form a diffusor outlet having a width B in relation to the machine direction MD, wherein an extraction device for extracting air or process air through the depositing device or through the depositing foraminous belt is provided and wherein an extraction region arranged underneath the diffusor outlet has a width b in the machine direction which is greater than the width B of the diffusor outlet. Machine direction (MD) means within the scope of the invention in particular the conveying direction of the filament deposition or nonwoven web on the deposition device or on the depositing foraminous belt.
It lies within the scope of the invention that the extraction region with its width b extends underneath the diffusor over the entire width B of the diffusor outlet. It lies within the scope of the invention that the extraction region is delimited by two partitions arranged consecutively in the machine direction. The width b of the extraction region is in particular measured between the upper - facing the
The invention relates to a device for producing spunbonds from endless filaments, in particular endless filaments of thermoplastic material, comprising at least one spinneret for spinning the endless filaments, at least one cooling device for cooling the filaments, at least one stretching device for stretching the filaments and comprising at least one depositing device for depositing the filaments to form a nonwoven web. Endless filaments means within the scope of the invention filaments having almost endless length. These endless filaments differ in this respect from staple fibres which have much shorter lengths of for example 10 to 60 mm.
Devices of the type mentioned initially are fundamentally known from practice in various embodiments. These devices are also known as spunbond devices.
Many of the devices of this type known from practice have the disadvantage that at high filament speeds and high throughputs or production rates, the quality of the filament deposition leaves something to be desired. This particularly relates to the homogeneity of the deposition and the strength of the nonwoven webs produced. High filament speeds and low titres of the product endless filaments can frequently only be achieved with significant loss of quality of the nonwoven webs produced. The known devices are therefore capable of improvement in this respect.
Accordingly, the invention is based on the technical problem of providing a device of the type mentioned initially in which high filament speeds and low titres as well as high production rates can be achieved and nevertheless, the quality of the filament deposition or the nonwoven web produced meets all the requirements.
In order to solve this technical problem, the invention teaches a device for producing spunbonds from endless filaments, in particular from thermoplastic material, comprising at least one spinneret for spinning the endless filaments, at least one cooling device for cooling the filaments, at least one stretching device for stretching the filaments and comprising at least one depositing device, in - particular in the form of a depositing foraminous belt, for depositing the filaments to form the nonwoven web, wherein at least one diffusor is arranged between the stretching device and the depositing device or the depositing foraminous belt so that filaments and primary air from the stretching device enter into the diffusor, wherein in the region of the at least one diffusor at least two secondary air inlet gaps arranged on opposite sides of the diffusor are provided through which the secondary air enters into the diffusor, 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 at an inflow angle a with respect to the filament flow direction FS or with respect to the longitudinal central plane M of the device or the diffusor, wherein this inflow angle a is less than 1000, expediently less than or equal to 90 , preferably less than 80 , preferably less than 70 and particularly preferably less than 65 , wherein the last diffusor section in the filament flow direction FS has diffusor walls which diverge towards the depositing device, wherein these diffusor walls form a diffusor outlet having a width B in relation to the machine direction MD, wherein an extraction device for extracting air or process air through the depositing device or through the depositing foraminous belt is provided and wherein an extraction region arranged underneath the diffusor outlet has a width b in the machine direction which is greater than the width B of the diffusor outlet. Machine direction (MD) means within the scope of the invention in particular the conveying direction of the filament deposition or nonwoven web on the deposition device or on the depositing foraminous belt.
It lies within the scope of the invention that the extraction region with its width b extends underneath the diffusor over the entire width B of the diffusor outlet. It lies within the scope of the invention that the extraction region is delimited by two partitions arranged consecutively in the machine direction. The width b of the extraction region is in particular measured between the upper - facing the
2 deposition device or the depositing foraminous belt - ends of the two partitions = in the machine direction. Expediently at least one extraction fan is provided by means of which process air is extracted in the extraction region through the deposition device or through the depositing foraminous belt. According to one embodiment of the invention, several extraction regions can be arranged consecutively in the machine direction - for example three extraction regions -which in particular differ from one another in relation to their extraction speed.
The extraction region claimed in patent claim 1 is then the principal extraction region arranged underneath the diffusor output or directly underneath the diffusor outlet. In principle, the extraction region or principal extraction region arranged under the diffusor outlet or directly under the diffusor outlet can for its part be divided, for example, by partitions. This extraction region or principal extraction region is then characterized in that the extraction speed is the same or substantially the same over the entire width b of the extraction region.
Expediently the average extraction speed in the extraction region or principal extraction region varies by no more than 20%, in particular no more than 30%
or no more than 40% and in particular by no more than 50%. It lies within the scope of the invention in this connection that in an additional extraction region arranged upstream of the extraction region or principal extraction region in relation to the machine direction (MD) according to one embodiment and/or an additional extraction region arranged downstream of the extraction region or principal extraction region in relation to the machine direction (MD), an extraction speed exists which is different from the extraction speed of the extraction region or the principal extraction region.
According to a particularly recommended embodiment of the invention, the width b of the extraction 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 diffusor outlet.
According to one embodiment, the width b of the extraction region is at least 1.5 times, in particular at least 1.6 times or at least 1.7 times the width B of the diffusor outlet.
A very preferred embodiment of the device according to the invention is characterized in that the extraction region projects in relation to the machine direction (MD) downstream of the deposition region of the filaments by a first
The extraction region claimed in patent claim 1 is then the principal extraction region arranged underneath the diffusor output or directly underneath the diffusor outlet. In principle, the extraction region or principal extraction region arranged under the diffusor outlet or directly under the diffusor outlet can for its part be divided, for example, by partitions. This extraction region or principal extraction region is then characterized in that the extraction speed is the same or substantially the same over the entire width b of the extraction region.
Expediently the average extraction speed in the extraction region or principal extraction region varies by no more than 20%, in particular no more than 30%
or no more than 40% and in particular by no more than 50%. It lies within the scope of the invention in this connection that in an additional extraction region arranged upstream of the extraction region or principal extraction region in relation to the machine direction (MD) according to one embodiment and/or an additional extraction region arranged downstream of the extraction region or principal extraction region in relation to the machine direction (MD), an extraction speed exists which is different from the extraction speed of the extraction region or the principal extraction region.
According to a particularly recommended embodiment of the invention, the width b of the extraction 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 diffusor outlet.
According to one embodiment, the width b of the extraction region is at least 1.5 times, in particular at least 1.6 times or at least 1.7 times the width B of the diffusor outlet.
A very preferred embodiment of the device according to the invention is characterized in that the extraction region projects in relation to the machine direction (MD) downstream of the deposition region of the filaments by a first
3 extraction section beyond the width of the diffusor outlet and/or wherein the extraction region projects in relation to the machine direction (MD) upstream of the deposition region of the filaments by a second extraction section beyond the width of the diffusor outlet. Preferably the extraction region or the principal extraction region projects on both sides in relation to its width b beyond the width B of the diffusor outlet and specifically on one side by the first extraction section and on the other side by the second extraction section. Expediently the width bi of the first extraction section and/or the width b2 of the second extraction section is 2 to 30%, preferably 2.5 to 25% and particularly preferably 3 to 20% of the width B of the diffusor outlet.
A very recommended embodiment of the invention is characterized in that the extraction by means of the extraction device takes place with the proviso that at least in the region of the diffusor outlet, tertiary air flows along the outer surfaces of the diffusor walls in the direction of the depositing device or depositing foraminous belt and that at least a part of this tertiary air is extracted through the deposition device or the depositing foraminous belt. It lies within the scope of the invention that the tertiary air flows are preferably aligned parallel or substantially parallel to the mixed flow of primary air and secondary air flowing in the direction of the diffusor outlet inside the diffusor. It is recommended that the volume flow of tertiary air VT extracted with the extraction device is at least 25%, preferably at least 30%, preferably at least 40% and particularly preferably at least 50% of the volume flow of extracted primary and secondary air flows.
The previously described preferred extraction of the tertiary air has proved successful insofar as undesired turbulence in the deposition region of the filaments can thereby be avoided.
According to the invention, the endless filaments are produced using a spunbond device. It lies within the scope of the invention here that the cooling device, the stretching device and the at least one diffusor extend transversely to the machine direction (MD) over the production width or over the width (DC
width) of the nonwoven web to be produced. According to a particularly preferred embodiment of the invention, the unit comprising cooling device and stretching device is configured as a closed unit and apart from the supply of cooling air in the cooling device, no further supply of a fluid medium or no
A very recommended embodiment of the invention is characterized in that the extraction by means of the extraction device takes place with the proviso that at least in the region of the diffusor outlet, tertiary air flows along the outer surfaces of the diffusor walls in the direction of the depositing device or depositing foraminous belt and that at least a part of this tertiary air is extracted through the deposition device or the depositing foraminous belt. It lies within the scope of the invention that the tertiary air flows are preferably aligned parallel or substantially parallel to the mixed flow of primary air and secondary air flowing in the direction of the diffusor outlet inside the diffusor. It is recommended that the volume flow of tertiary air VT extracted with the extraction device is at least 25%, preferably at least 30%, preferably at least 40% and particularly preferably at least 50% of the volume flow of extracted primary and secondary air flows.
The previously described preferred extraction of the tertiary air has proved successful insofar as undesired turbulence in the deposition region of the filaments can thereby be avoided.
According to the invention, the endless filaments are produced using a spunbond device. It lies within the scope of the invention here that the cooling device, the stretching device and the at least one diffusor extend transversely to the machine direction (MD) over the production width or over the width (DC
width) of the nonwoven web to be produced. According to a particularly preferred embodiment of the invention, the unit comprising cooling device and stretching device is configured as a closed unit and apart from the supply of cooling air in the cooling device, no further supply of a fluid medium or no
4 further supply of air into this closed unit of cooling device and stretching device takes place. This closed unit or this closed system has proved particularly successful within the framework of the invention and contributes effectively to the solution of the technical problem.
The cooling device of the device according to the invention can have only one cooling chamber in which the filaments are acted upon with cooling air or process air at a specific temperature. According to a further embodiment of the invention, the cooling device has two cooling chambers arranged one above the other or consecutively. In these two cooling chambers the filaments can each be acted upon with cooling air or process air at different temperatures. The device can also be adapted with the proviso that the exit speed of the process air from an upper cooling chamber for cooling the filaments and the exit speed from a lower cooling chamber is different.
The secondary air inlet gaps or the secondary air introduced through these secondary air inlet gaps have particular importance within the framework of the invention. In this case, it lies within the scope of the invention that the secondary air inlet gaps extend over 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 opposite secondary air inlet gaps are arranged between the stretching device and the diffusor adjoining the stretching device. According to one embodiment of the invention, two diffusors are arranged consecutively in the filament flow direction FS and two opposite secondary air inlet gaps are provided between the two diffusors. Two secondary air inlet gaps can be arranged at the same vertical height. However it also lies 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 opposite secondary air inlet gaps are provided and particularly preferably between stretching device and diffusor.
Of particular importance is the inflow angle a 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 at an inflow angle a with respect to the filament flow direction FS. According to one embodiment, the - inflow angle a is between 80 and 110 . A recommended embodiment is characterized in that the inflow angle a is less than 900, preferably less than 80 , preferably less than 70 and particularly preferably less than 65 . In this case, it has proved particularly successful that the inflow angle a is less than 60 , preferably less than 550 and very preferably less than 50 . According to a very recommended embodiment, the inflow angle a is between 0 and 60 , expediently 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 secondary air takes place with the proviso that after its entry the secondary air flows parallel or quasi-parallel to the filament flow direction FS.
Expediently the secondary air inlet gaps are adapted accordingly to achieve the inflow angle a, in particular adapted with the aid of inflow slopes and/or inflow channels and the like. According to a preferred embodiment, in order to implement the inflow angle a in the region of a secondary air inlet gap, a sloping inflow wall adjoining or connected to a diffusor wall of the diffusor is provided, which inflow wall encloses an angle with the filament flow direction FS which corresponds or substantially corresponds to the inflow angle a. Preferably in this embodiment, a corresponding inflow wall is provided for each secondary air inlet gap. It is recommended that such an inflow wall forms an inflow slope to implement the inflow angle a. The implementation of the inflow angle a according to the invention has proved particularly successful within the scope of the invention and makes an efficient contribution to the solution of the technical problem. Combined with the configuration of the extraction region according to the invention, a high-quality filament deposition and a particularly homogeneous nonwoven web can be obtained. Of particular importance within the framework of the combination of the features of the device according to the invention is the closed system or the configuration of the unit comprising cooling device and stretching device as a closed unit.
Primary air means within the framework of the invention the process air guided through the stretching device which emerges from the stretching device or from the stretching shaft of the stretching device into the diffusor. A very preferred embodiment of the invention is characterized in that in the area of the secondary air inlet gaps, the ratio of the volume flows of primary air and secondary air VA/Vs is less than 5, preferably less than 4.8 and preferably less than 4.5. According to a recommended embodiment of the invention, the volume flow of the secondary air incoming through the secondary air inlet gaps is adjustable, preferably adjustable for each secondary air inlet gap and according to one embodiment, adjustable independently of one another. It is recommended that the cross-section of the secondary air inlet gaps is variable or adjustable. Expediently the volume flow of secondary air incoming through two secondary air inlet gaps arranged on opposite sides of the diffusor is the same or substantially the same or differs by a maximum of 15%, in particular by up to a maximum of 20%. Preferably the vertical height of the secondary air inlet gaps is 2 to 20 mm, preferably 3 to 18 mm and particularly preferably 5 to 15 mm. One 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). Expediently for this purpose the vertical height of the secondary air inlet gaps is adjusted or varied over the CD width (transversely to the machine direction MD). It is recommended that the adjustment of the secondary air volume flows is made with the proviso that the volume flow of inflowing secondary air decreases in relation to the CD direction towards the edges of the device or towards the edges of the secondary air inlet gaps. Preferably the secondary air volume flow entering through the secondary air inlet gaps is merely lower in the edge regions of the secondary air inlet gaps than in the central region of the secondary air inlet gaps. It is recommended that these edge regions have a length of 5 to 20 cm. In the edge regions expediently a maximum of 75%, preferably a maximum of 80% of the secondary air volume flow which enters in the central region of the secondary air inlet gaps is supplied. 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 and according to one embodiment of the invention, apart from the aforesaid edge regions, expediently in the entire central region of the secondary air inlet gaps. In this respect, the invention is based on the finding that a particularly homogeneous filament deposition can thus be achieved or a very homogeneous filament deposition can be achieved over the CD width.
A very recommended embodiment of the invention is characterized in that in the filament flow direction a convergent section of a diffusor or of the diffusor adjoins downstream or underneath the secondary air inlet gaps. Quite particularly preferred here is an embodiment in which in the filament flow direction downstream of or underneath the secondary air inlet gaps, firstly a convergent section of the diffusor is arranged, then a constriction of the diffusor follows and downstream of or underneath the constriction, a divergent section of the diffusor is provided (convergent - constriction - divergent). In the constriction as it were, a compaction of the secondary air or the primary air-secondary air mixture which has flowed in takes place. A preferred embodiment is characterized in that the convergent section of the diffusor is shorter or significantly shorter than the divergent section of the diffusor. Expediently the length IK of the convergent diffusor section is a maximum of 75%, preferably a maximum of 60% and preferably a maximum of 50% of the length ID of the divergent section of this diffusor. It is recommended that the length IK of the convergent section of the diffusor is a maximum of 40%, preferably a maximum of 35% and preferably a maximum of 30% of the length ID of the divergent diffusor section. Expediently the ratio IK/ID of the length IK of the convergent diffusor section to the length ID of the divergent diffusor section is 0.1 to 1 and preferably 0.15 to 0.9. It is recommended that the length IK of the convergent diffusor section is 5 to 50% and preferably 10 to 50% of the length L of the entire diffusor.
It lies within the scope of the invention that the diffusor outlet angle 13 of the diffusor outlet - or of the last diffusor section arranged in the filament flow direction over the depositing device - is a maximum of 30 , preferably a maximum of 25 and very preferably a maximum of 20 . The diffusor outlet angle 13 is measured between a diffusor wall of the divergent diffusor section and the longitudinal central axis M of the diffusor. Preferably the diffusor walls of the divergent diffusor section forming the diffusor outlet are configured to be pivotable so that the diffusor outlet angle 13 is variable or adjustable. It is recommended that the width B of the diffusor outlet of the divergent diffusor _ section is a maximum of 300%, preferably a maximum of 250% and preferably ' a maximum of 200% of the width VB of the outlet gap of the stretching device or the stretching shaft of the stretching device. A particularly preferred embodiment of the invention is characterized in that the distance of the diffusor or the lower edge - in particular the lowest lower edge - of the diffusor from the deposition device or from the depositing foraminous belt is 20 to 300 mm, in particular 30 to 150 mm and preferably 30 to 120 mm.
It lies within the scope of the invention that a monomer extraction device is arranged between the spinneret and the cooling device. By means of this monomer extraction device, air is extracted from the filament formation space underneath the spinneret. By this means, the gases emerging along with the endless filaments such as monomers, oligomers, decomposition products and the like can be removed from the device according to the invention. The monomer extraction device expediently has at least one extraction chamber to which the preferably at least one extraction fan is connected. The at least one extraction chamber is provided with at least one extraction slot for the extraction of the said gases towards the filament formation space. Furthermore a preferred embodiment of the invention contributes to a particularly effective solution of the technical problem which is characterized in that at least one first deformable seal is arranged between the spinneret and the monomer extraction device for sealing a first gap formed between the spinneret and the monomer extraction device and/or at least one second deformable seal is provided between the monomer extraction device and the cooling device for sealing a second gap formed between the monomer extraction device and the cooling device and/or at least one third deformable seal is provided between the cooling device and the stretching device or an intermediate channel of the stretching device for sealing a third gap formed between the cooling device and the stretching device or the intermediate channel. Preferably the installation properties, in particular the pressing force or the pressing pressure of such a deformable seal are variable or adjustable in relation to the boundary regions or boundary surfaces of the respective gap. It is recommended that such a preferred deformable seal extends over the entire width or over the entire CD width (transverse to the machine direction) of the device according to the invention. It lies within the scope of the invention that such a deformable seal runs around over the entire circumference or substantially over the entire circumference of the filament flow = channel. It lies 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, non-uniformities in relation to the height h of the gap can be compensated by variation or re-adjustment of the installation properties of the seal in this height direction. It is recommended that the seal can be filled or is filled with a fluid medium and that the re-adjustment or adjustment of the seal is accomplished by introducing the fluid medium into the seal or by removing the fluid medium from the seal. Preferably the at least one deformable seal is an inflatable seal. According to another embodiment, the deformable seal can also have at least one sealing element pressed by means of at least one spring element onto a boundary surface of the gap to be sealed. The sealing element can in particular comprise a sealing lip and the seal can thus comprise a spring-loaded sealing lip. The sealing element is expediently fixed on a boundary surface of the gap to be seal 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 adapted with the proviso that a seal is made at a pressure in the filament flow channel of more than 2000 Pa, in particular of more than Pa. The embodiment with the deformable seal has proved particularly successful within the framework of the teaching according to the invention.
Combined with the remaining features according to the invention or preferred features of the device according to the invention, optimal aerodynamic relationships are obtained in the device which effectively contribute to the solution of the technical problem according to the invention.
The invention is based on the finding that with the device according to the invention, nonwoven webs or spunbonds with exceptional quality can be produced. In particular with the aid of the teaching according to the invention, a homogeneous filament deposition and therefore a homogeneous nonwoven web can be produced both in the machine direction and also transversely to the machine direction. An optimal homogeneous nonwoven deposition can be achieved in particular even at higher or at high production speeds. High filament speeds and therefore low titres of the filaments can be achieved with the device according to the invention, with nevertheless good homogeneous filament deposition. High filament speeds and low titres can easily be achieved 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 nevertheless relatively simple and does not have a complex structure.
The invention is explained in detail hereinafter with reference to drawings showing only one exemplary embodiment. In the figures in schematic view:
Fig. 1 shows a vertical section through a device according to the invention, Fig. 2 shows an enlarged section A of the lower region of the device according to the invention, The figures show a device according to the invention for producing spunbonds of endless filaments 1, in particular made of endless filaments 1 of thermoplastic material. The device comprises a spinneret 2 for spinning the endless filaments 1 as well as a cooling device 3 for cooling the filaments.
According to a particularly preferred embodiment of the invention, a monomer extraction device 4 is arranged between the spinneret 2 and the cooling device 3. With this monomer extraction device 4, perturbing gases produced during the spinning process can be removed from the device. These can be, for example, monomers, oligomers or decomposition products and similar substances. A gap is formed between the monomer extraction device 4 and the cooling device 3 which usually runs around the entire filament formation space or filament flow space. According to a very preferred embodiment and in the exemplary embodiment according to the figures (see in particular Fig. 1), at least one deformable seal 6 for sealing the said gap 5 is disposed between the monomer extraction device 4 and the cooling device 3. Expediently the at least one deformable seal 6 runs around in the gap 5 over the entire filament formation space or filament flow space. Here It lies within the scope of the invention that the installation properties, in particular the pressing force or the pressing pressure of the seal 6 in relation to the boundary surfaces of the gap 5 can be varied or re-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 over this vertical height h of the gap 5. Preferably and in the exemplary embodiment, the at least one deformable seal 6 comprises a seal 6 = which can be inflated with a fluid medium. By supplying or removing the fluid medium - preferably air - the installation properties, in particular the pressing force or the pressing pressure of the seal 6 can be varied.
In the exemplary embodiment (see in particular Fig. 1), the cooling device 3 comprises two cooling chambers arranged one above the other or consecutively in which the filaments can be acted upon in particular with process air or cooling air at different temperature. In principle however, a cooling device 3 with only one cooling chamber is possible within the scope of the invention.
A stretching device 7 for stretching the filaments 1 is arranged downstream of the cooling device 3 in the filament flow direction FS. Preferably and in the exemplary embodiment, the cooling device 3 is adjoined by an intermediate channel 8 which connects the cooling device 3 to a stretching shaft 9 of the stretching device 7. According to a preferred embodiment and in the exemplary embodiment, the unit comprising the cooling device 3, the intermediate channel 8 and the stretching shaft 9 is configured as a closed system. Apart from the supply of cooling air in the cooling device 3, no further air is supplied to the unit.
The air guided through the stretching device 7 or through the stretching shaft is here and subsequently designated as primary air P.
According to the invention, the stretching device 7 is followed in the filament flow direction FS by at least one diffusor 10. Preferably and in the exemplary embodiment, two opposite secondary air inlet gaps 11, 12 for the introduction of secondary air S are arranged between the stretching device 7 or between the stretching shaft 9 and the diffusor 10. Expediently the secondary air inlet gaps 11, 12 extend over the entire width or CD width of the device according to the invention. According to the invention the secondary air is supplied through the secondary air inlet gaps at an inflow angle a which is less than 1000, expediently less than or equal to 90 , preferably less than 80 and in the exemplary embodiment less than 450. According to a very recommended embodiment of the invention, the inflow angle a is between 0 and 60 , preferably between 2 and 50 . In order to achieve the inflow angle a, in the exemplary embodiment (see in particular Fig. 2) suitable adapted inflow guides 13 are provided which in the exemplary embodiment are configured as inflow channels 14 connected obliquely to the secondary air inlet gaps 11, 12. Here the inflow channels 14 form an angle with the filament flow direction FS or with the longitudinal central axis M with the proviso that the secondary air can flow in at the specified inflow angle a. According to a particularly preferred embodiment, a quasi-parallel inflow of secondary air to the filament flow direction FS takes place.
According to a particularly recommended embodiment of the invention, the volume flow of secondary air supplied through the secondary air inlet gaps 11, 12 can be adjusted. This can be achieved in particular by adjusting the cross-sections of the secondary air inlet gaps 11, 12. In principle, different volume flows of supplied secondary air S can also be adjusted for the two opposite secondary air inlet gaps 11, 12. According to one embodiment of the invention, the secondary air volume flow flowing in through the secondary air inlet gaps 11, 12 - preferably in relation to each secondary air inlet gap 11, 12 - can be adjusted or varied transversely to the machine direction or over the CD width.
In this case, the supplied secondary air volume flow in the edge regions or the device or the secondary air inlet gaps 11, 12 is expediently different compared with the central region of the device or the central region of the secondary air inlet gaps 11, 12.
As a result of the entrance of secondary air S through the secondary air inlet gaps 11, 12, primary air P is mixed with secondary air S in the adjoining diffusor 10. According to a preferred embodiment of the invention, in the region of the secondary air inlet gaps 11, 12, the ratio of the volume flows of primary air and secondary air VpNs is less than 5 and preferably less than 4.5.
In the exemplary embodiment according to the figures, only one diffusor 10 is provided in the filament flow direction FS underneath the stretching device 7.
In principle two or more diffusors 10 can be connected consecutively. The diffusor provided in the exemplary embodiment according to the figures has a convergent diffusor section 15 downstream of or underneath the secondary air inlet gaps 11, 12 in the filament flow direction FS. Preferably and in the exemplary embodiment, this convergent diffusor section 15 is followed by a constriction 16 of the diffusor 10. In the filament flow direction FS
downstream of or underneath the constriction 16, the diffusor 10 is preferably and in the exemplary embodiment provided with a divergent diffusor section 17. It is recommended that and in the exemplary embodiment, the divergent diffusor section 17 of the diffusor 10 in the filament flow direction FS is longer or significantly longer than the convergent diffusor section 15. Preferably and in the exemplary embodiment, the length lk of the convergent diffusor section 15 is less than 50% of the length ID of the divergent diffusor section 17.
It is recommended that and in the exemplary embodiment, the diffusor outlet angle 13 between a diffusor wall 18 of the divergent diffusor section 17 and the longitudinal central axis M of the diffusor 14 is a maximum of 25 .
Expediently and in the exemplary embodiment, the width B of the diffusor outlet 19 is a maximum of 300%, preferably a maximum of 250% of the width VB of the outlet gap 20 of the stretching shaft 9.
The endless filaments 1 emerging from the diffusor 10 are deposited on a deposition device configured as depositing foraminous belt 21 for filament deposition or to form the nonwoven web 22.The deposited filament or nonwoven web 22 is the conveyed or transported away by the depositing foraminous belt 21 in the machine direction MD. According to the invention, an extraction device for extracting air or process air through the deposition device or through the depositing foraminous belt 12 is provided. To this end, an extraction region 23 is arranged underneath the diffusor outlet 19 which preferably has a width b in the machine direction (MD). This width b of the extraction region 23 is according to the invention greater than the width B of the diffusor outlet 19. The widths b and B are shown in Fig. 2. According to a preferred embodiment of the invention, the width b of the extraction region 23 is at least 1.2 times, preferably at least 1.3 times the width B of the diffusor outlet 19. In the exemplary embodiment the width B of the diffusor outlet 19 is measured as the horizontal distance of the lower ends of the diffusor walls 18. If the ends of the diffusor walls 18 of the divergent diffusor section 17 do not end in the same horizontal plane or do not end at the same vertical height, the distance of the end of the longer diffusor wall 18 from the end of the shorter diffusor wall 18 which is imagined to be lengthened at the same vertical height is measured.
The extraction region 23 located underneath the depositing foraminous belt 21 is delimited by two partitions 27, 28 arranged consecutively in the machine direction MD. The width b of the extraction region 23 is measured as the distance between the two partitions 27, 28 and specifically as the distance of the upper ends of the two partitions 27, 28. It can be particularly seen from Fig.
2 that in relation to the machine direction (MD) downstream of the deposition region of the filaments 1 the extraction region 23 projects by a first extraction section 24 beyond the diffusor outlet 19 or over the width B of the diffusor outlet 19. Furthermore, in relation to the machine direction (MD) upstream of the deposition region of the filaments 1, the extraction region 23 projects by a second extraction section 25 beyond the diffusor outlet 19 or beyond the width B of the diffusor outlet 19. It can be seen in Fig. 2 that the first extraction section 24 has a width bi and the second extraction section 25 has a width b2.
According to one embodiment and in the exemplary embodiment, the widths bi and b2 are the same. In principle however, they could also be different.
In particular, as a result of the configuration of the extraction region 23 according to the invention, the extraction by the depositing foraminous belt takes place with the proviso that in the region of the diffusor outlet 19, tertiary air T flows along the outer surfaces 26 in the direction of the depositing foraminous belt 21. According to a particularly preferred embodiment, the flows of the 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 diffusor outlet 19 of the diffusor 10. Thus, according to a very preferred embodiment of the invention, primary air P and secondary air S as well as tertiary air T are sucked through the depositing foraminous belt 21. Expediently the flows of primary air P, secondary air S and tertiary air T flow parallel or quasi-parallel through the depositing foraminous belt 12.
The cooling device of the device according to the invention can have only one cooling chamber in which the filaments are acted upon with cooling air or process air at a specific temperature. According to a further embodiment of the invention, the cooling device has two cooling chambers arranged one above the other or consecutively. In these two cooling chambers the filaments can each be acted upon with cooling air or process air at different temperatures. The device can also be adapted with the proviso that the exit speed of the process air from an upper cooling chamber for cooling the filaments and the exit speed from a lower cooling chamber is different.
The secondary air inlet gaps or the secondary air introduced through these secondary air inlet gaps have particular importance within the framework of the invention. In this case, it lies within the scope of the invention that the secondary air inlet gaps extend over 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 opposite secondary air inlet gaps are arranged between the stretching device and the diffusor adjoining the stretching device. According to one embodiment of the invention, two diffusors are arranged consecutively in the filament flow direction FS and two opposite secondary air inlet gaps are provided between the two diffusors. Two secondary air inlet gaps can be arranged at the same vertical height. However it also lies 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 opposite secondary air inlet gaps are provided and particularly preferably between stretching device and diffusor.
Of particular importance is the inflow angle a 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 at an inflow angle a with respect to the filament flow direction FS. According to one embodiment, the - inflow angle a is between 80 and 110 . A recommended embodiment is characterized in that the inflow angle a is less than 900, preferably less than 80 , preferably less than 70 and particularly preferably less than 65 . In this case, it has proved particularly successful that the inflow angle a is less than 60 , preferably less than 550 and very preferably less than 50 . According to a very recommended embodiment, the inflow angle a is between 0 and 60 , expediently 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 secondary air takes place with the proviso that after its entry the secondary air flows parallel or quasi-parallel to the filament flow direction FS.
Expediently the secondary air inlet gaps are adapted accordingly to achieve the inflow angle a, in particular adapted with the aid of inflow slopes and/or inflow channels and the like. According to a preferred embodiment, in order to implement the inflow angle a in the region of a secondary air inlet gap, a sloping inflow wall adjoining or connected to a diffusor wall of the diffusor is provided, which inflow wall encloses an angle with the filament flow direction FS which corresponds or substantially corresponds to the inflow angle a. Preferably in this embodiment, a corresponding inflow wall is provided for each secondary air inlet gap. It is recommended that such an inflow wall forms an inflow slope to implement the inflow angle a. The implementation of the inflow angle a according to the invention has proved particularly successful within the scope of the invention and makes an efficient contribution to the solution of the technical problem. Combined with the configuration of the extraction region according to the invention, a high-quality filament deposition and a particularly homogeneous nonwoven web can be obtained. Of particular importance within the framework of the combination of the features of the device according to the invention is the closed system or the configuration of the unit comprising cooling device and stretching device as a closed unit.
Primary air means within the framework of the invention the process air guided through the stretching device which emerges from the stretching device or from the stretching shaft of the stretching device into the diffusor. A very preferred embodiment of the invention is characterized in that in the area of the secondary air inlet gaps, the ratio of the volume flows of primary air and secondary air VA/Vs is less than 5, preferably less than 4.8 and preferably less than 4.5. According to a recommended embodiment of the invention, the volume flow of the secondary air incoming through the secondary air inlet gaps is adjustable, preferably adjustable for each secondary air inlet gap and according to one embodiment, adjustable independently of one another. It is recommended that the cross-section of the secondary air inlet gaps is variable or adjustable. Expediently the volume flow of secondary air incoming through two secondary air inlet gaps arranged on opposite sides of the diffusor is the same or substantially the same or differs by a maximum of 15%, in particular by up to a maximum of 20%. Preferably the vertical height of the secondary air inlet gaps is 2 to 20 mm, preferably 3 to 18 mm and particularly preferably 5 to 15 mm. One 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). Expediently for this purpose the vertical height of the secondary air inlet gaps is adjusted or varied over the CD width (transversely to the machine direction MD). It is recommended that the adjustment of the secondary air volume flows is made with the proviso that the volume flow of inflowing secondary air decreases in relation to the CD direction towards the edges of the device or towards the edges of the secondary air inlet gaps. Preferably the secondary air volume flow entering through the secondary air inlet gaps is merely lower in the edge regions of the secondary air inlet gaps than in the central region of the secondary air inlet gaps. It is recommended that these edge regions have a length of 5 to 20 cm. In the edge regions expediently a maximum of 75%, preferably a maximum of 80% of the secondary air volume flow which enters in the central region of the secondary air inlet gaps is supplied. 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 and according to one embodiment of the invention, apart from the aforesaid edge regions, expediently in the entire central region of the secondary air inlet gaps. In this respect, the invention is based on the finding that a particularly homogeneous filament deposition can thus be achieved or a very homogeneous filament deposition can be achieved over the CD width.
A very recommended embodiment of the invention is characterized in that in the filament flow direction a convergent section of a diffusor or of the diffusor adjoins downstream or underneath the secondary air inlet gaps. Quite particularly preferred here is an embodiment in which in the filament flow direction downstream of or underneath the secondary air inlet gaps, firstly a convergent section of the diffusor is arranged, then a constriction of the diffusor follows and downstream of or underneath the constriction, a divergent section of the diffusor is provided (convergent - constriction - divergent). In the constriction as it were, a compaction of the secondary air or the primary air-secondary air mixture which has flowed in takes place. A preferred embodiment is characterized in that the convergent section of the diffusor is shorter or significantly shorter than the divergent section of the diffusor. Expediently the length IK of the convergent diffusor section is a maximum of 75%, preferably a maximum of 60% and preferably a maximum of 50% of the length ID of the divergent section of this diffusor. It is recommended that the length IK of the convergent section of the diffusor is a maximum of 40%, preferably a maximum of 35% and preferably a maximum of 30% of the length ID of the divergent diffusor section. Expediently the ratio IK/ID of the length IK of the convergent diffusor section to the length ID of the divergent diffusor section is 0.1 to 1 and preferably 0.15 to 0.9. It is recommended that the length IK of the convergent diffusor section is 5 to 50% and preferably 10 to 50% of the length L of the entire diffusor.
It lies within the scope of the invention that the diffusor outlet angle 13 of the diffusor outlet - or of the last diffusor section arranged in the filament flow direction over the depositing device - is a maximum of 30 , preferably a maximum of 25 and very preferably a maximum of 20 . The diffusor outlet angle 13 is measured between a diffusor wall of the divergent diffusor section and the longitudinal central axis M of the diffusor. Preferably the diffusor walls of the divergent diffusor section forming the diffusor outlet are configured to be pivotable so that the diffusor outlet angle 13 is variable or adjustable. It is recommended that the width B of the diffusor outlet of the divergent diffusor _ section is a maximum of 300%, preferably a maximum of 250% and preferably ' a maximum of 200% of the width VB of the outlet gap of the stretching device or the stretching shaft of the stretching device. A particularly preferred embodiment of the invention is characterized in that the distance of the diffusor or the lower edge - in particular the lowest lower edge - of the diffusor from the deposition device or from the depositing foraminous belt is 20 to 300 mm, in particular 30 to 150 mm and preferably 30 to 120 mm.
It lies within the scope of the invention that a monomer extraction device is arranged between the spinneret and the cooling device. By means of this monomer extraction device, air is extracted from the filament formation space underneath the spinneret. By this means, the gases emerging along with the endless filaments such as monomers, oligomers, decomposition products and the like can be removed from the device according to the invention. The monomer extraction device expediently has at least one extraction chamber to which the preferably at least one extraction fan is connected. The at least one extraction chamber is provided with at least one extraction slot for the extraction of the said gases towards the filament formation space. Furthermore a preferred embodiment of the invention contributes to a particularly effective solution of the technical problem which is characterized in that at least one first deformable seal is arranged between the spinneret and the monomer extraction device for sealing a first gap formed between the spinneret and the monomer extraction device and/or at least one second deformable seal is provided between the monomer extraction device and the cooling device for sealing a second gap formed between the monomer extraction device and the cooling device and/or at least one third deformable seal is provided between the cooling device and the stretching device or an intermediate channel of the stretching device for sealing a third gap formed between the cooling device and the stretching device or the intermediate channel. Preferably the installation properties, in particular the pressing force or the pressing pressure of such a deformable seal are variable or adjustable in relation to the boundary regions or boundary surfaces of the respective gap. It is recommended that such a preferred deformable seal extends over the entire width or over the entire CD width (transverse to the machine direction) of the device according to the invention. It lies within the scope of the invention that such a deformable seal runs around over the entire circumference or substantially over the entire circumference of the filament flow = channel. It lies 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, non-uniformities in relation to the height h of the gap can be compensated by variation or re-adjustment of the installation properties of the seal in this height direction. It is recommended that the seal can be filled or is filled with a fluid medium and that the re-adjustment or adjustment of the seal is accomplished by introducing the fluid medium into the seal or by removing the fluid medium from the seal. Preferably the at least one deformable seal is an inflatable seal. According to another embodiment, the deformable seal can also have at least one sealing element pressed by means of at least one spring element onto a boundary surface of the gap to be sealed. The sealing element can in particular comprise a sealing lip and the seal can thus comprise a spring-loaded sealing lip. The sealing element is expediently fixed on a boundary surface of the gap to be seal 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 adapted with the proviso that a seal is made at a pressure in the filament flow channel of more than 2000 Pa, in particular of more than Pa. The embodiment with the deformable seal has proved particularly successful within the framework of the teaching according to the invention.
Combined with the remaining features according to the invention or preferred features of the device according to the invention, optimal aerodynamic relationships are obtained in the device which effectively contribute to the solution of the technical problem according to the invention.
The invention is based on the finding that with the device according to the invention, nonwoven webs or spunbonds with exceptional quality can be produced. In particular with the aid of the teaching according to the invention, a homogeneous filament deposition and therefore a homogeneous nonwoven web can be produced both in the machine direction and also transversely to the machine direction. An optimal homogeneous nonwoven deposition can be achieved in particular even at higher or at high production speeds. High filament speeds and therefore low titres of the filaments can be achieved with the device according to the invention, with nevertheless good homogeneous filament deposition. High filament speeds and low titres can easily be achieved 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 nevertheless relatively simple and does not have a complex structure.
The invention is explained in detail hereinafter with reference to drawings showing only one exemplary embodiment. In the figures in schematic view:
Fig. 1 shows a vertical section through a device according to the invention, Fig. 2 shows an enlarged section A of the lower region of the device according to the invention, The figures show a device according to the invention for producing spunbonds of endless filaments 1, in particular made of endless filaments 1 of thermoplastic material. The device comprises a spinneret 2 for spinning the endless filaments 1 as well as a cooling device 3 for cooling the filaments.
According to a particularly preferred embodiment of the invention, a monomer extraction device 4 is arranged between the spinneret 2 and the cooling device 3. With this monomer extraction device 4, perturbing gases produced during the spinning process can be removed from the device. These can be, for example, monomers, oligomers or decomposition products and similar substances. A gap is formed between the monomer extraction device 4 and the cooling device 3 which usually runs around the entire filament formation space or filament flow space. According to a very preferred embodiment and in the exemplary embodiment according to the figures (see in particular Fig. 1), at least one deformable seal 6 for sealing the said gap 5 is disposed between the monomer extraction device 4 and the cooling device 3. Expediently the at least one deformable seal 6 runs around in the gap 5 over the entire filament formation space or filament flow space. Here It lies within the scope of the invention that the installation properties, in particular the pressing force or the pressing pressure of the seal 6 in relation to the boundary surfaces of the gap 5 can be varied or re-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 over this vertical height h of the gap 5. Preferably and in the exemplary embodiment, the at least one deformable seal 6 comprises a seal 6 = which can be inflated with a fluid medium. By supplying or removing the fluid medium - preferably air - the installation properties, in particular the pressing force or the pressing pressure of the seal 6 can be varied.
In the exemplary embodiment (see in particular Fig. 1), the cooling device 3 comprises two cooling chambers arranged one above the other or consecutively in which the filaments can be acted upon in particular with process air or cooling air at different temperature. In principle however, a cooling device 3 with only one cooling chamber is possible within the scope of the invention.
A stretching device 7 for stretching the filaments 1 is arranged downstream of the cooling device 3 in the filament flow direction FS. Preferably and in the exemplary embodiment, the cooling device 3 is adjoined by an intermediate channel 8 which connects the cooling device 3 to a stretching shaft 9 of the stretching device 7. According to a preferred embodiment and in the exemplary embodiment, the unit comprising the cooling device 3, the intermediate channel 8 and the stretching shaft 9 is configured as a closed system. Apart from the supply of cooling air in the cooling device 3, no further air is supplied to the unit.
The air guided through the stretching device 7 or through the stretching shaft is here and subsequently designated as primary air P.
According to the invention, the stretching device 7 is followed in the filament flow direction FS by at least one diffusor 10. Preferably and in the exemplary embodiment, two opposite secondary air inlet gaps 11, 12 for the introduction of secondary air S are arranged between the stretching device 7 or between the stretching shaft 9 and the diffusor 10. Expediently the secondary air inlet gaps 11, 12 extend over the entire width or CD width of the device according to the invention. According to the invention the secondary air is supplied through the secondary air inlet gaps at an inflow angle a which is less than 1000, expediently less than or equal to 90 , preferably less than 80 and in the exemplary embodiment less than 450. According to a very recommended embodiment of the invention, the inflow angle a is between 0 and 60 , preferably between 2 and 50 . In order to achieve the inflow angle a, in the exemplary embodiment (see in particular Fig. 2) suitable adapted inflow guides 13 are provided which in the exemplary embodiment are configured as inflow channels 14 connected obliquely to the secondary air inlet gaps 11, 12. Here the inflow channels 14 form an angle with the filament flow direction FS or with the longitudinal central axis M with the proviso that the secondary air can flow in at the specified inflow angle a. According to a particularly preferred embodiment, a quasi-parallel inflow of secondary air to the filament flow direction FS takes place.
According to a particularly recommended embodiment of the invention, the volume flow of secondary air supplied through the secondary air inlet gaps 11, 12 can be adjusted. This can be achieved in particular by adjusting the cross-sections of the secondary air inlet gaps 11, 12. In principle, different volume flows of supplied secondary air S can also be adjusted for the two opposite secondary air inlet gaps 11, 12. According to one embodiment of the invention, the secondary air volume flow flowing in through the secondary air inlet gaps 11, 12 - preferably in relation to each secondary air inlet gap 11, 12 - can be adjusted or varied transversely to the machine direction or over the CD width.
In this case, the supplied secondary air volume flow in the edge regions or the device or the secondary air inlet gaps 11, 12 is expediently different compared with the central region of the device or the central region of the secondary air inlet gaps 11, 12.
As a result of the entrance of secondary air S through the secondary air inlet gaps 11, 12, primary air P is mixed with secondary air S in the adjoining diffusor 10. According to a preferred embodiment of the invention, in the region of the secondary air inlet gaps 11, 12, the ratio of the volume flows of primary air and secondary air VpNs is less than 5 and preferably less than 4.5.
In the exemplary embodiment according to the figures, only one diffusor 10 is provided in the filament flow direction FS underneath the stretching device 7.
In principle two or more diffusors 10 can be connected consecutively. The diffusor provided in the exemplary embodiment according to the figures has a convergent diffusor section 15 downstream of or underneath the secondary air inlet gaps 11, 12 in the filament flow direction FS. Preferably and in the exemplary embodiment, this convergent diffusor section 15 is followed by a constriction 16 of the diffusor 10. In the filament flow direction FS
downstream of or underneath the constriction 16, the diffusor 10 is preferably and in the exemplary embodiment provided with a divergent diffusor section 17. It is recommended that and in the exemplary embodiment, the divergent diffusor section 17 of the diffusor 10 in the filament flow direction FS is longer or significantly longer than the convergent diffusor section 15. Preferably and in the exemplary embodiment, the length lk of the convergent diffusor section 15 is less than 50% of the length ID of the divergent diffusor section 17.
It is recommended that and in the exemplary embodiment, the diffusor outlet angle 13 between a diffusor wall 18 of the divergent diffusor section 17 and the longitudinal central axis M of the diffusor 14 is a maximum of 25 .
Expediently and in the exemplary embodiment, the width B of the diffusor outlet 19 is a maximum of 300%, preferably a maximum of 250% of the width VB of the outlet gap 20 of the stretching shaft 9.
The endless filaments 1 emerging from the diffusor 10 are deposited on a deposition device configured as depositing foraminous belt 21 for filament deposition or to form the nonwoven web 22.The deposited filament or nonwoven web 22 is the conveyed or transported away by the depositing foraminous belt 21 in the machine direction MD. According to the invention, an extraction device for extracting air or process air through the deposition device or through the depositing foraminous belt 12 is provided. To this end, an extraction region 23 is arranged underneath the diffusor outlet 19 which preferably has a width b in the machine direction (MD). This width b of the extraction region 23 is according to the invention greater than the width B of the diffusor outlet 19. The widths b and B are shown in Fig. 2. According to a preferred embodiment of the invention, the width b of the extraction region 23 is at least 1.2 times, preferably at least 1.3 times the width B of the diffusor outlet 19. In the exemplary embodiment the width B of the diffusor outlet 19 is measured as the horizontal distance of the lower ends of the diffusor walls 18. If the ends of the diffusor walls 18 of the divergent diffusor section 17 do not end in the same horizontal plane or do not end at the same vertical height, the distance of the end of the longer diffusor wall 18 from the end of the shorter diffusor wall 18 which is imagined to be lengthened at the same vertical height is measured.
The extraction region 23 located underneath the depositing foraminous belt 21 is delimited by two partitions 27, 28 arranged consecutively in the machine direction MD. The width b of the extraction region 23 is measured as the distance between the two partitions 27, 28 and specifically as the distance of the upper ends of the two partitions 27, 28. It can be particularly seen from Fig.
2 that in relation to the machine direction (MD) downstream of the deposition region of the filaments 1 the extraction region 23 projects by a first extraction section 24 beyond the diffusor outlet 19 or over the width B of the diffusor outlet 19. Furthermore, in relation to the machine direction (MD) upstream of the deposition region of the filaments 1, the extraction region 23 projects by a second extraction section 25 beyond the diffusor outlet 19 or beyond the width B of the diffusor outlet 19. It can be seen in Fig. 2 that the first extraction section 24 has a width bi and the second extraction section 25 has a width b2.
According to one embodiment and in the exemplary embodiment, the widths bi and b2 are the same. In principle however, they could also be different.
In particular, as a result of the configuration of the extraction region 23 according to the invention, the extraction by the depositing foraminous belt takes place with the proviso that in the region of the diffusor outlet 19, tertiary air T flows along the outer surfaces 26 in the direction of the depositing foraminous belt 21. According to a particularly preferred embodiment, the flows of the 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 diffusor outlet 19 of the diffusor 10. Thus, according to a very preferred embodiment of the invention, primary air P and secondary air S as well as tertiary air T are sucked through the depositing foraminous belt 21. Expediently the flows of primary air P, secondary air S and tertiary air T flow parallel or quasi-parallel through the depositing foraminous belt 12.
Claims (13)
1. Device for producing spunbonds from endless filaments (1), in particular endless filaments of thermoplastic material, comprising at least one spinneret (2) for spinning the endless filaments (1), at least one cooling device (3) for cooling the filaments, at least one stretching device (7) for stretching the filaments and comprising at least one depositing device, in particular in the form of a depositing foraminous belt (21) for depositing the filaments to form a nonwoven web, wherein at least one diffusor (10) is arranged between the stretching device (7) and the depositing device or the depositing foraminous belt (21) so that filaments and primary air from the stretching device enter into the diffusor (10), wherein in the region of the at least one diffusor (10) at least two secondary air inlet gaps (11, 12) are provided on opposite sides of the diffusor (10) through which the secondary air enters into the diffusor (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 flows in at an inflow angle a with respect to the filament flow direction FS or with respect to the longitudinal central plane M of the device or the diffusor (10), wherein this inflow angle a 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 diffusor section in the filament flow direction has diffusor walls (18) which diverge towards the depositing device, wherein these diffusor walls (18) form a diffusor outlet (19) having a width B in the machine direction (MD), wherein at least one extraction device for extracting air or process air through the depositing device or through the depositing foraminous belt (21) is provided and wherein an extraction region (23) arranged underneath the diffusor outlet (19) has a width b in the machine direction which is greater than the width B
of the diffusor outlet (19).
and in particular less than 65°, wherein the last diffusor section in the filament flow direction has diffusor walls (18) which diverge towards the depositing device, wherein these diffusor walls (18) form a diffusor outlet (19) having a width B in the machine direction (MD), wherein at least one extraction device for extracting air or process air through the depositing device or through the depositing foraminous belt (21) is provided and wherein an extraction region (23) arranged underneath the diffusor outlet (19) has a width b in the machine direction which is greater than the width B
of the diffusor outlet (19).
2. The device according to claim 1, wherein the width b of the extraction region (23) 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 diffusor outlet (19).
3. The device according to any one of claims 1 or 2, wherein the extraction region (23) projects in relation to the machine direction (MD) downstream of the deposition region of the filaments by a (first) extraction section (24) beyond the diffusor outlet (19) and/or wherein the extraction region projects in relation to the machine direction (MD) upstream of the deposition region of the filaments by a (second) extraction section (25) beyond the diffusor outlet (19).
4. The device according to any one of claims 1 to 3, wherein the extraction by the extraction device takes place with the proviso that at least in the region of the diffusor outlet (19) tertiary air flows along the outer surfaces of the diffusor walls (18) in the direction of the deposition device or the depositing foraminous belt (21), wherein the tertiary air flows are preferably aligned parallel or substantially parallel to the mixed flow of primary air and secondary air flowing in the direction of the diffusor outlet (19) inside the diffusor (10) and wherein tertiary air is also extracted through the deposition device or through the depositing foraminous belt (21).
5. The device according to any one of claims 1 to 4, wherein the volume flow of tertiary air VT extracted with the extraction device is at least 25%, preferably at least 40% and particularly preferably at least 50% of the volume flow of the extracted primary and secondary air flows.
6. The device according to any one of claims 1 to 5, wherein the unit comprising cooling device (3) and stretching device (7) is configured as a closed unit, wherein apart from the supply of cooling air in the cooling device, no further supply of a fluid medium or another air supply into this closed unit takes place.
7. The device according to any one of claims 1 to 6, wherein in the region of the secondary air inlet gaps, the ratio of the volume flows of primary air and secondary air Vp/Vs is less than 5, preferably less than 4.5.
8. The device according to any one of claims 1 to 7, wherein in the flow direction of the filaments a convergent diffusor section (15) adjoins downstream or underneath the secondary air inlet gaps.
9. The device according to claim 8, wherein in the flow direction of the filaments a convergent diffusor section (15) is followed by a constriction of the diffusor (10) and wherein the constriction is followed by at least one divergent diffusor section (17).
10. The device according to claim 9, wherein the length IK of the convergent diffusor section (15) is 5 to 50% and preferably 10 to 50% of the length L of the entire diffusor (10).
11. The device according to any one of claims 9 or 10, wherein the ratio IK/ID
of the length IK of the convergent diffusor section (15) to the length ID of the divergent diffusor section (17) is 0.1 to 1, preferably 0.15 to 0.9.
of the length IK of the convergent diffusor section (15) to the length ID of the divergent diffusor section (17) is 0.1 to 1, preferably 0.15 to 0.9.
12. The device according to any one of claims 1 to 11, wherein the diffusor outlet angle .beta. with respect to the longitudinal central axis M of the diffusor (10) is a maximum of 30°, preferably a maximum of 25°.
13. The device according to any one of claims 1 to 12, wherein the distance of the diffusor (10) or the lower edge of the diffusor (10) from the deposition device or from the depositing foraminous belt (21) is 20 to 300 mm, in particular 30 to 150 mm and preferably 30 to 120 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17164375.2A EP3382081B1 (en) | 2017-03-31 | 2017-03-31 | Device for the manufacture of woven material from continuous filaments |
| EP17164375.2 | 2017-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2997488A1 true CA2997488A1 (en) | 2018-09-30 |
| CA2997488C CA2997488C (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2997488A Active CA2997488C (en) | 2017-03-31 | 2018-03-06 | Device for producing spunbonds from endless filaments |
Country Status (18)
| Country | Link |
|---|---|
| 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) |
Cited By (1)
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| CN116695266A (en) * | 2023-08-09 | 2023-09-05 | 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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| EP3592891A1 (en) * | 2017-03-10 | 2020-01-15 | Biome Bioplastics Limited | Fabric |
| DK3771762T3 (en) * | 2019-07-30 | 2021-08-30 | Reifenhaeuser Masch | Apparatus and method for making a nonwoven fabric from fibers |
| CN111155240A (en) * | 2020-01-22 | 2020-05-15 | 宏大研究院有限公司 | Tangential air supplement device for spun-bonded 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 |
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| DE19521466C2 (en) * | 1995-06-13 | 1999-01-14 | Reifenhaeuser Masch | Plant for the production of a spunbonded nonwoven web from thermoplastic continuous filaments |
| US6799957B2 (en) * | 2002-02-07 | 2004-10-05 | Nordson Corporation | Forming system for the manufacture of thermoplastic nonwoven webs and laminates |
| DE50211736D1 (en) * | 2002-02-28 | 2008-04-03 | Reifenhaeuser Gmbh & Co Kg | Plant for the continuous production of a spunbonded web |
| US8333918B2 (en) * | 2003-10-27 | 2012-12-18 | Kimberly-Clark Worldwide, Inc. | Method for the production of nonwoven web materials |
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| DE102004040645A1 (en) * | 2004-08-20 | 2006-03-02 | REIFENHäUSER GMBH & CO. MASCHINENFABRIK | Apparatus for the continuous production of a spunbonded nonwoven web |
| US20060040008A1 (en) * | 2004-08-20 | 2006-02-23 | Reifenhaeuser Gmbh & Co. Kg Maschinenfabrik | Device for the continuous production of a nonwoven web |
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| CN104755667B (en) * | 2012-10-27 | 2016-11-09 | 欧瑞康纺织有限及两合公司 | For manufacturing the equipment of spunbonded non-woven fabric |
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-
2017
- 2017-03-31 DK DK17164375T patent/DK3382081T3/en active
- 2017-03-31 EP EP17164375.2A patent/EP3382081B1/en active Active
- 2017-03-31 JO JOP/2018/0032A patent/JO3481B1/en active
- 2017-03-31 PL PL17164375T patent/PL3382081T3/en unknown
- 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 KR KR1020180035044A patent/KR102213092B1/en active IP Right Grant
- 2018-03-27 AR ARP180100736A patent/AR111445A1/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 JP JP2018063809A patent/JP6851341B2/en active Active
- 2018-03-29 US US15/939,753 patent/US20180282926A1/en not_active Abandoned
- 2018-03-30 CN CN201810295003.0A patent/CN108691097B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116695266A (en) * | 2023-08-09 | 2023-09-05 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2704908C2 (en) | 2019-10-31 |
| CN108691097B (en) | 2021-10-29 |
| SA118390477B1 (en) | 2021-11-23 |
| CA2997488C (en) | 2021-04-06 |
| ES2751161T3 (en) | 2020-03-30 |
| CO2018003214A1 (en) | 2019-03-29 |
| MX2018003621A (en) | 2018-11-22 |
| AR111445A1 (en) | 2019-07-17 |
| ZA201801818B (en) | 2019-01-30 |
| CN108691097A (en) | 2018-10-23 |
| JP2018172841A (en) | 2018-11-08 |
| EP3382081B1 (en) | 2019-08-28 |
| US20180282926A1 (en) | 2018-10-04 |
| KR20180111576A (en) | 2018-10-11 |
| RU2018111083A (en) | 2019-10-02 |
| JOP20180032A1 (en) | 2019-01-30 |
| KR102213092B1 (en) | 2021-02-04 |
| DK3382081T3 (en) | 2019-11-11 |
| PL3382081T3 (en) | 2020-03-31 |
| RU2018111083A3 (en) | 2019-10-02 |
| EP3382081A1 (en) | 2018-10-03 |
| SI3382081T1 (en) | 2020-01-31 |
| MY191354A (en) | 2022-06-18 |
| JP6851341B2 (en) | 2021-03-31 |
| JO3481B1 (en) | 2020-07-05 |
| BR102018006571A2 (en) | 2018-11-21 |
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