EP2630287A1 - Procédé et dispositif de fabrication d'un non-tissé composite - Google Patents

Procédé et dispositif de fabrication d'un non-tissé composite

Info

Publication number
EP2630287A1
EP2630287A1 EP11781766.8A EP11781766A EP2630287A1 EP 2630287 A1 EP2630287 A1 EP 2630287A1 EP 11781766 A EP11781766 A EP 11781766A EP 2630287 A1 EP2630287 A1 EP 2630287A1
Authority
EP
European Patent Office
Prior art keywords
belt
nonwoven
batt
suction
composite
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
Application number
EP11781766.8A
Other languages
German (de)
English (en)
Other versions
EP2630287B1 (fr
Inventor
Norbert KÜHL
Markus Hones
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hi Tech Textile Holding GmbH
Original Assignee
Hi Tech Textile Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hi Tech Textile Holding GmbH filed Critical Hi Tech Textile Holding GmbH
Publication of EP2630287A1 publication Critical patent/EP2630287A1/fr
Application granted granted Critical
Publication of EP2630287B1 publication Critical patent/EP2630287B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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
    • D04H1/559—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 the fibres being within layered webs
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/04—Carding machines with worker and stripper or like rollers operating in association with a main cylinder
    • 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

Definitions

  • the invention relates to a method for producing a composite nonwoven fabric in a continuous process sequence and to an apparatus for carrying out the method.
  • nonwoven layers are determined. For example, in composite nonwovens used for
  • Fleece layers cause sound waves are compensated and little reflected.
  • Such composite nonwovens which are used for insulation and noise reduction, have a relatively low basis weight, so that special demands are made on their production.
  • Thin-film laminate which consists of a foam or a nonwoven fabric and associated meltblown fibers.
  • the foam or non-woven fabric is drawn off in the form of a web from a first roll, then sprayed with a contact adhesive and with a
  • the nonwoven topsheet may consist of a meltblown web provisionally bonded by ultrasound.
  • the thin-film laminate is then placed in Cut pieces and fed to a molding press.
  • EP 0 501 842 B1 or DE 692 09 703 T2 deals with the production of a textile fabric for clothing production.
  • a first nonwoven layer of microfibers is made by meltblowing, forming a second, carded nonwoven layer and then attaching it under the first layer. The two
  • the second carded nonwoven layer is preferably pre-needled.
  • a distributed applied adhesive is used.
  • a third nonwoven layer can be added.
  • Embodiment can be directly applied and formed on a second carded layer, a meltblown microfiber layer.
  • a further object of the invention is to guide a batt produced by a carding device with the highest possible belt speed to a composite web. Further, an object of the invention is the formation of a multi-layer acoustic insulating nonwoven member.
  • the claimed technique has the advantage that even very loose and lightweight laid batts can be safely combined with a nonwoven layer made by meltblowing.
  • Meltblowing caused swirling and alteration of the batt is avoided by moving the batt into a holding zone, e.g. a suction zone is guided, so that the batt on the depositing belt has a e.g. receives fixation generated via the suction flow.
  • Synthetic fibers produced by meltblowing are deposited in the region of the holding or suction zone to form a nonwoven layer directly on the fibrous web and in this connection connected to a compound.
  • the thereby occurring excess blown air can also be advantageous over a
  • the nonwoven fibrous web can be led out of the suction zone and directed to a web laying device.
  • Fleece-laying device then combines several layers of the batt or compound to the composite web.
  • the development of the invention is particularly advantageous in which the batt penetrates within the suction zone a plurality of successive suction regions with separately adjustable suction. This can be used to change the state of the
  • Fibrous adapted pressure conditions are generated on the storage belt, on the one hand to minimize a suction flow generated from the environment and on the other hand, the blown air generated by the melt blowing safely
  • the batt can be formed from fibers and fiber mixtures of synthetic or natural fibers. For binding and solidification, however, it has proven to be particularly advantageous if the fibers or fiber mixtures are formed to form the batt with a weight fraction in the range between 10% and 100% of synthetic fibers.
  • the method variant is preferably used, in which the fiber material of the synthetic fibers and the polymer melt for extruding the synthetic fibers are formed from an identical base material. This considerably improves the recycling of such composite nonwovens.
  • the nonwoven layer on the surface of the batt is preferably laid with fine fibers to provide for the
  • the variant of the method is preferably used, in which the synthetic fibers during melt blowing with a fine fiber cross-section in the range of 0.2 ⁇ to
  • the composite fleece can also be used produce coarser synthetic fibers advantageous.
  • the performance of the carding device is the following:
  • the nonwoven layer between the batt forms an intermediate layer.
  • Such double batt layers are particularly suitable for protecting the intermediate nonwoven layer of the synthetic fibers from further treatment.
  • the structure and distribution of the synthetic fibers within the nonwoven layer remain unchanged and can thus already on the
  • the process variant is particularly advantageous, in which the composite nonwoven is solidified by a thermal treatment in a belt dryer, wherein the
  • Calibration zone is performed, in which a relative to a guide belt adjustable calibration acts on a free top of the composite web.
  • Solidification can be adjusted to a certain thickness of the composite nonwoven. The melting of the
  • Synthetic fibers within the nonwoven layers can advantageously be avoided in such a way that the fiber material of the synthetic fibers has a slightly higher melting point than the synthetic fibers of the fiber web. This can be advantageously achieved by additives even with the same base polymer.
  • the composite nonwoven is stored in a storage device to a winding or alternatively to a stack. In a stack formation, the memory device additionally has a
  • Cutting device to each cut the composite nonwoven into individual pieces of nonwoven, which are then stacked on top of each other.
  • the device according to the invention preferably has a carding device, a
  • the station as a melt blown device
  • suction device is preferred
  • Fibrous web is held fixed on the storage belt via a suction effect.
  • Device formed by a plurality of suction chambers, which are connected to a vacuum source, the suction chambers are assigned to set an individual negative pressure separate control means. This allows both the position of the batt and the filing of synthetic fibers in the nonwoven layer into it
  • the development of the device according to the invention is preferably used, in which the melt blowing device has a movable
  • the device according to the invention is especially so
  • the pickup device has two separate pickup points, which cooperates with two band assemblies of the transport device for receiving and removing multiple batt.
  • the variant of the device is used, in which one of the band assemblies cooperates with the storage belt and the second belt assembly with a
  • Deflection can be performed in a plane.
  • the second band arrangement has a second depositing band and that the second depositing band is assigned a second spinner head of the melt blowing device.
  • the second depositing band is assigned a second spinner head of the melt blowing device.
  • the further treatment of the composite web takes place within the device by means of a conveyor belt device which connects the web laying device with a solidification device and a storage device.
  • the composite fleece can thus be stored to form a roll or stack.
  • the device has a belt dryer with a guide belt and a calibration belt arranged above the guide belt, wherein the calibration belt is designed to be height-adjustable relative to the guide belt.
  • the calibration belt is designed to be height-adjustable relative to the guide belt.
  • Bonded nonwoven be produced.
  • inventive method is described below with reference to some embodiments of the invention
  • Figure 1 shows schematically a first partial view of a first
  • FIG. 3 schematically shows a cross-sectional view of FIG
  • FIG. 5 schematically shows a partial view of another
  • the invention relates to a method and an apparatus for producing a composite nonwoven fabric (36) and to a sound-absorbing nonwoven element produced therefrom.
  • FIGS. 1 and 2 show a first exemplary embodiment of the device according to the invention for carrying out the method according to the invention.
  • 1 is a partial view of the front half of the machine and in Figure 2 is a partial view of the rear half of the machine shown.
  • the device according to the invention has a carding device (1) in the front half of the machine according to FIG.
  • the carding device (1) cooperates at one end with a feed device (2) and at the opposite end with a pickup device (7).
  • a pre-drum (4) and a main drum (5) are arranged, on whose circumference a plurality of carding elements (6) act.
  • a plurality of feed system (3) are provided for receiving a fiber stream continuously provided by the feed device (2) and leading to the pre-drum (4).
  • the fibers are carded and over in the
  • Main drum (5) associated with pickup device (7) removed as a batt. It should be expressly mentioned at this point that the construction and the number of drums and carding elements used in the carding device are exemplary.
  • carding devices with only one drum can be used.
  • the pickup device (7) is in this case
  • Transport device (9) is formed in this embodiment by a first conveyor belt (10.1), a storage belt (11) and a second conveyor belt (10.2), which cooperate together to form a batt (32)
  • the storage belt (11) is on a top one
  • Meltblown device (12) is at the surface of the batt (32) a nonwoven layer (35) made of meltblown
  • Nonwoven layer (35) is referred to below as a compound.
  • the holding device (17) can on the Faserflor (32) and / or on a compressed gas flow of the
  • Melt blowing device (12) act. It can e.g. hold the batt (32) on the storage belt (11) and
  • the holding device (17) may e.g. when
  • the storage belt (11) is gas-permeable and is guided over a total of three suction chambers (18.1, 18.2 and 18.3) of the suction device (17).
  • the suction chambers (18.1, 18.2 and 18.3) of the suction device (17) via separate suction lines (19.1, 19.2 and 19.3) independently of each other with a vacuum source (not shown here) and via associated control means (20.1, 20.2, 20.3) independently from each other in their suction power
  • a melt blowing device (12) comprises a spinner head (13) which is coupled by a melt line (34) to an extruder (14).
  • the spinner head (13) also has a
  • Compressed air supply on, via a control valve (16) with a compressed air source (not shown here) is connected.
  • the spinning head (13) has at its
  • the working widths of the carding device (1) may be in the range of 2 m to 4 m and above. Accordingly, the width of the meltblowing die is also in the range of 2 m to 4 m.
  • the spinning head (13) and the extruder (14) are held in this embodiment on a movable support (21) through which the spinner head (13) between an operating position and a rest position is guided back and forth.
  • the spinning head (13) of the melt blowing device (12) is located directly above the depositing belt (11), which on its underside through the
  • Suction chamber (18.2) is sucked.
  • the suction chamber (18.2) is connected via the suction line (19.2) and a control means (20.2) with a vacuum source, not shown here.
  • (14) is movable and can be
  • the carrier (21) can be moved so that the spinning head (13) in a
  • profiling Lengthwise consistently or locally changed
  • the conveyor belt device (23) is accordingly in dependence on the number of layers and of the
  • the nonwoven laying device (22) subsequently follows a solidification device (24) and a storage device (28).
  • the solidification device (24) by a belt dryer (25) is formed, which
  • the calibration belt (27) is designed to be height-adjustable relative to the position of the guide belt (26) so that a composite web (36) guided on the guide belt (26) can be solidified with a specific material thickness.
  • the consolidation takes place via a
  • Thermobonding called. This is done by melting the fiber material of some fibers within the
  • Nonwoven composite produces a stable cohesion of all fibers.
  • the storage device (28) On the outlet side of the solidification device (24), the storage device (28) is provided, which is formed in this embodiment by a winding station (29).
  • the winding station (29) generates a nonwoven roll (30) from the continuously supplied composite nonwoven (36).
  • Device is particularly suitable to carry out the process for producing a composite nonwoven fabric (36) which is used as insulating or Dämmmaterial.
  • Such composite nonwovens usually have a relatively low basis weight and a relatively loose
  • Transport device (9) recorded and continuously discharged.
  • Transport device (9) are doing with a
  • the batt (32) is transferred from the first conveyor belt (10.1) to the delivery belt (11) such that the batt (32) leads to the meltblowing device (12) in which a nonwoven layer is formed on the surface of the batt (32) (35) made of synthetic fibers (33) laid and the compound is formed.
  • the batt (32) on the storage belt (11) is passed through a holding zone, e.g. a suction zone, guided.
  • the suction zone is formed in this embodiment by the three suction chambers (18.1, 18.2 and 18.3) In the suction zone, the underside of the storage belt (11), which is gas-permeable and, for example, a screen belt or
  • Cloth tape can be vacuumed. This will be a
  • Fibrous (32) is maintained despite the resulting air bubbles during melt blowing.
  • a polymer melt is melted via an extruder (14) and fed to a spinning head (13).
  • a melt-blowing nozzle is provided, through which a plurality of synthetic fibers (33) are extruded and via a in the
  • Spinning head (13) also supplied compressed gas, e.g.
  • the melt-blowing nozzle, the melt throughput and the compressed air setting are hereby preferably chosen such that relatively fine synthetic fibers (33) are produced.
  • the synthetic fibers (33) have
  • the synthetic fibers (33) are preferably deposited on the fibrous web (32) in the middle region of the suction zone so that the suction chambers (18.1 to 18.3) can be adjusted separately in an inlet region, in a contact region and in an outlet region of the suction chamber
  • the deposits of the synthetic fibers (33) can be influenced by different suction powers.
  • the blown air generated by melt blowing can be incorporated into the deposition process of the synthetic fibers by the suction chamber ambient air. This allows additional effects and structures to be produced in the nonwoven layer.
  • Fibrous pile (32) is laid, the batt (32) with the nonwoven layer (35), i. the compound through which
  • the fleece laying device (22) is the Fibrous web (32) with the nonwoven layer (35) laid in multiple layers to the desired composite nonwoven fabric (36).
  • the composite nonwoven fabric (36) has, for example, at least two superimposed layers of the batt (32) or a plurality of double layers of the batt
  • the composite web (36) is continuously removed by the conveyor belt device (23) and fed to the solidification device (24).
  • the belt speed of the conveyor belt device (23) is in this case dependent on the number of layers and on the laying width of the fleece laying device (22).
  • Bonded nonwoven (36) thermally consolidated, where in particular in a calibration zone on the interaction of the
  • Material thickness of the composite web (36) is determined.
  • the composite nonwoven fabric (36) is wound up into the nonwoven roll (30).
  • the fiber material of the first layer Preferably, the fiber material of the first layer
  • Fiber material of the synthetic fibers (33) matched to one another such that during the thermobonding substantially only the synthetic fibers in the batt (32) are melted for solidification. In that sense that is
  • Fiber material of synthetic fibers also known as
  • Bikoticiann can be formed with a something equipped with a lower melting point than the
  • Fleece laying device (22) a second carding device is arranged with a pickup device to produce a second batt.
  • the second batt would be placed on the batt layer so that the batt layer
  • one or both batt made of a fiber blend of synthetic fibers and natural fibers.
  • at least 10% of the fibers are formed by synthetic fibers.
  • a single-layer fiber web (32) for the production of the composite web (36) is removed from the carding device (1). Basically, however, there is also the
  • the pickup device (7) forms two pickup points
  • the transport device (9) has in this
  • Embodiment a lower band assembly (38.1) and an upper band assembly (38.2).
  • the upper band assembly (38.2) has a transport section
  • Band assembly (38.2) can in this case be formed in several parts by a plurality of conveyor belts or else in one piece by a circulating conveyor belt.
  • the multilayer nonwoven fabric or multilayer compound thus formed is fed to the nonwoven laying device (22) and laid down in several layers to form the composite nonwoven fabric (36).
  • the suction chamber (18) preferably extends in the longitudinal direction of the storage belt (11) in such a way that immediately before or at the inlet of the fiber web (32) into the storage zone
  • Melt blowing device (12) has a holding force on the
  • Fibrous web (32) due to the suction effect of the suction chamber (18) is produced.
  • FIG. 5 a further exemplary embodiment is shown schematically in a partial view, which is essentially identical to the exemplary embodiment in FIG. Compared to the aforementioned embodiment of Figure 4, the band assemblies (38.1) and (38.2) are identical, so that the band assembly (38.1) a lower storage band
  • Each of the storage belts (11.1) and (11.2) is in each case assigned a suction chamber (18.1) and (18.2) which independently of one another convey the respective storage belts (11.1) and (11.2). Above the storage belts
  • Fibers (32.1) and (32.2) each generates a nonwoven layer (35.1) and (35.2).
  • the nonwoven layers (35.1) and (35.2) can be identical or different in structure and construction.
  • That is The method shown and the apparatus shown can be expanded flexibly to produce single-layer or multi-ply batt for the production of composite nonwovens.
  • three fibrous webs could be produced simultaneously, for example by means of a kadi device, by means of three separate pickup locations, which can be converted into a multi-layer nonwoven or multi-layer compound via three conveyor belt systems
  • Melt blowing devices may be arranged, which the
  • Transport belt systems are assigned, so that two of the three batt are covered with a nonwoven layer of synthetic fibers prior to merging.
  • multilayer nonwovens can advantageously be produced which contain synthetic fibers of two different polymers.
  • meltblowing devices could also be assigned one after the other to a conveyor belt system in order to deposit two nonwoven layers on a batt.
  • the holding device (17) may be formed and arranged in a different manner, for example as an electrostatic or mechanical holding device, the the Faserflor (32) with electrostatic forces, hooks or needles or the like.
  • the storage belt (11, 11.1, 11.2) holds and stabilized against blowing.
  • the storage belt (11, 11.1, 11.2) can in turn be gas-permeable.
  • On a suction device can be omitted in these cases.
  • Suction device may alternatively be present, but designed to be weaker. It is also possible to have a
  • Ablageband (11, 11.1, 11.2) and acts on the underside of the local Obertrums. It can alternatively be arranged elsewhere and outside the storage belt.
  • Fleece laying device (22) e.g. as a stacker
  • a fleece laying device (22) may be designed as a feeder, Camel-back-Leger or the like.
  • the single- or multi-layered compound can be cut in further variation before storage and divided into pieces, the pieces are individually and optionally aligned one above the other to form a multilayer composite web (36) are placed on each other.
  • the fleece laying device (22) is designed for this purpose in a correspondingly modified manner.
  • the mono- or multi-layer compound is fed to a nonwoven laying device (22) as soon as it is formed. In variation this can be an intermediate step between the
  • Compound formation and a fleece laying device (22) are inserted.
  • the single-layer or multi-layered compound are taken up and temporarily stored, whereby it is only at a later time of a fleece laying device (22) or another
  • Intermediate step may be said compound, e.g. in
  • the further treatment can be designed in another way.
  • Nonwoven elements are produced. For this purpose, if necessary, a molding process with pressing and possibly heating
  • a multilayer composite fleece (36) with an outer and / or inner fleece layer (35, 35.1, 35.2) has particular advantages for the
  • control means 20, 20.1, 20.2, 20.3 control means

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un non-tissé composite au cours d'un cycle d'opérations continu et un dispositif permettant de mettre en œuvre ledit procédé. Un voile de carde, sur la surface duquel est posée ensuite une couche de non-tissé de fibres synthétiques, est formé par un dispositif de cardage à partir d'un courant de fibres. A cet effet, le voile de carde est guidé à l'intérieur d'une zone d'aspiration sur une bande de dépôt en direction d'un dispositif de fusion-soufflage, dans lequel les fibres synthétiques sont déposées par fusion-soufflage sur la surface du voile de carde. Le voile de carde revêtu de la couche de non-tissé est ensuite déposé par un dispositif de dépôt de voile de carde en plusieurs couches pour obtenir le non-tissé composite.
EP11781766.8A 2010-10-21 2011-10-21 Procédé et dispositif de fabrication d'un non-tissé composite Not-in-force EP2630287B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010049180 2010-10-21
PCT/EP2011/068408 WO2012052535A1 (fr) 2010-10-21 2011-10-21 Procédé et dispositif de fabrication d'un non-tissé composite

Publications (2)

Publication Number Publication Date
EP2630287A1 true EP2630287A1 (fr) 2013-08-28
EP2630287B1 EP2630287B1 (fr) 2016-02-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11781766.8A Not-in-force EP2630287B1 (fr) 2010-10-21 2011-10-21 Procédé et dispositif de fabrication d'un non-tissé composite

Country Status (4)

Country Link
US (1) US20130269154A1 (fr)
EP (1) EP2630287B1 (fr)
CN (1) CN103180501B (fr)
WO (1) WO2012052535A1 (fr)

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CN103180501B (zh) 2017-06-06
WO2012052535A1 (fr) 2012-04-26
CN103180501A (zh) 2013-06-26
US20130269154A1 (en) 2013-10-17

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