EP1678362A1 - Method for the production of a voluminous sandwiched non-woven material from at least two cover non-woven materials and an inner pulp layer and machine unit for the same - Google Patents

Method for the production of a voluminous sandwiched non-woven material from at least two cover non-woven materials and an inner pulp layer and machine unit for the same

Info

Publication number
EP1678362A1
EP1678362A1 EP04766385A EP04766385A EP1678362A1 EP 1678362 A1 EP1678362 A1 EP 1678362A1 EP 04766385 A EP04766385 A EP 04766385A EP 04766385 A EP04766385 A EP 04766385A EP 1678362 A1 EP1678362 A1 EP 1678362A1
Authority
EP
European Patent Office
Prior art keywords
fleece
cover
volume
machine system
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04766385A
Other languages
German (de)
French (fr)
Inventor
Ullrich MÜNSTERMANN
Alfred Watzl
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.)
Truetzschler Nonwovens GmbH
Original Assignee
Fleissner 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 Fleissner GmbH filed Critical Fleissner GmbH
Publication of EP1678362A1 publication Critical patent/EP1678362A1/en
Withdrawn legal-status Critical Current

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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
    • D04H13/00—Other non-woven fabrics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/1565—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres by depositing continuous layers of fibrous material between webs, e.g. wrapping layers of fibrous material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/06—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by welding-together thermoplastic fibres, filaments, or yarns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat

Definitions

  • WO 01/53588 a method for producing a sandwich fleece from at least two cover nonwovens made of man-made fibers and / or natural fibers and a middle intermediate layer of pulp fibers is known.
  • the sandwich fleece runs into a water needling device and then into a dryer.
  • the bottom cover layer formed from continuous fibers passes through a pair of calender rolls to press the fiber layer before the pulp is applied.
  • Sandwich nonwovens manufactured in this way are optimal with regard to a loss-free amount of pulp fiber, but they are flat in the end product, they are not voluminous.
  • the object of the invention is to develop a method with which a voluminous sandwich fleece can also be achieved with this type of hydrodynamic bonding.
  • the invention proposes to increase the volume of the deposited, shaped cover webs, which are in any case produced, before the pulp layer is added.
  • This can be done by compressing, crimping, hydrodynamically treating or shrinking at least parts of the fibers of the cover layer.
  • the volume generated in the fleece must be fixed so that it is retained by the water needling during the final consolidation.
  • FIG. 1 shows a schematic illustration of a discontinuous offline system with a nonwoven pretreatment after the separate spinning unit
  • FIG. 2 shows a discontinuous inline system with a nonwoven pretreatment after the spinning process
  • FIG. 3 shows a spunbonded nonwoven system with water needling.
  • the endless filaments are formed in the unit 1 and placed on an endless belt 2.
  • the fleece 3 formed with a weight of z. B. 8 - 15 g / m 2 is then thermally solidified under pressure by means of a calender 4. Only now can the nonwoven be manipulated and rolled up here.
  • the roll 5 with the spunbond fleece 3 is to be submitted to a separate machine system for producing a sandwich fleece.
  • This system then consists of roll 5 for the ground cover fleece and a unit for increasing the volume of the fleece.
  • this unit is a simple hydrodynamic needling device 6 with a smooth or better structured drum surface 7.
  • a pair of calender rolls with gear meshing rolls or a fleece shrinking device can also be used.
  • the volume of the calendered nonwoven 3 must be increased in order to soften the grip of the end product.
  • the pulp is given a pulp layer, e.g. B. by means of the air-lay device 8.
  • the pulp layer is z. B. 20-60 g / m 2 .
  • the top layer of roll 5 ' has to be given up. B. by another pre-spunlace device 6 '.
  • the three-layer fleece is to be connected to one another in its layer, specifically by means of a hydrodynamic needling device 9 with water needling on both sides.
  • the PLC fleece is to be dried in device 10 and rolled up with device 11.
  • FIG. 2 Another, but ultimately also discontinuous system is shown in FIG. 2.
  • the calendered nonwoven 3 is first increased in volume before rolling up with the unit 5 ".
  • this is done by means of a simple pre-spunlace device 6" is integrated into the spinning system.
  • a structuring pair of rollers or an upsetting device can also be conceivable here.
  • a dryer 14 should follow, or at least a water suction device.
  • the Deckviies now achieved on the roll 5 ' is already increased in volume and soft to the touch. It can now be presented to the sandwich fleece system for both the floor fleece 5 "and for the cover fleece 5 '". In between, the pulp with the unit 8 has to be placed and everything has to be solidified and dry in the device 9 as before.
  • FIG. 3 discloses a spunbonded nonwoven system according to FIG. 2, but in which the pair of rollers 4 with the pre-spunlace device 6 "is replaced by a compacting unit, that is to say with an opposing compacting belt 2 ', both of which are flowed through by the water jets of a nozzle bar 12 After the more compact, the fleece is then increased in volume, which is done by the nozzle bar 13, which is also assigned to the endless belt 2. Finally, the fleece is to be dewatered by suction and / or by drying.

Abstract

The production of a sandwiched non-woven material from at least two cover non-woven material layers made from chemical fibres, or natural fibres and an inner intermediate layer of pulp fibres is known. After the superimposition of the non-woven material layers, the composite is placed in a hydrodynamic needling device where the connection and fixing of the layers occurs. According to the invention, a more voluminous and hence softer, non-woven end product of the above type may be produced, whereby the lower of the laid, formed and thus produced cover non-woven materials have the volume thereof increased before the application of the pulp layer. The above is achieved by means of a compression of the non-woven material having a given width or by calandering, by means of, for example, geared engaging rollers, or additional pre-water needling.

Description

Verfahren zur Herstellung eines voluminösen Sandwichvlieses aus zumindest zwei Deckvliesen und mittiger Pulpschicht und Maschinenanlage dazuProcess for the production of a voluminous sandwich fleece from at least two cover fleeces and a central pulp layer and machine system for this
Es ist durch z. B. die WO 01 /53588 ein Verfahren zur Herstellung eines Sandwichvlieses aus zumindest zwei Deckvliesen aus Chemiefasern und/oder Naturfasern und einer mittleren Zwischenschicht aus Pulpfasern bekannt. Zur Verfestigung läuft das Sandwichvlies in eine Wasservernadeluπgsvorrichtung vor und dann in einen Trockner. Die aus Endlosfasern gebildete untere Deckschicht durchläuft ein Kalanderwalzenpaar, um die Faserschicht zu pressen, bevor der Pulp aufgegeben wird.It is through z. B. WO 01/53588 a method for producing a sandwich fleece from at least two cover nonwovens made of man-made fibers and / or natural fibers and a middle intermediate layer of pulp fibers is known. For consolidation, the sandwich fleece runs into a water needling device and then into a dryer. The bottom cover layer formed from continuous fibers passes through a pair of calender rolls to press the fiber layer before the pulp is applied.
Sandwichvliese hergestellt nach dieser Art sind optimal bezüglich einer möglichst verlustfreien Pulpfasermenge, sie sind aber im Endprodukt flach, sie sind nicht voluminös.Sandwich nonwovens manufactured in this way are optimal with regard to a loss-free amount of pulp fiber, but they are flat in the end product, they are not voluminous.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu entwickeln, mit dem auch mit dieser hydrodynamischen Verfestigungsart ein voluminöses Sandwichvlies erzielt werden kann.The object of the invention is to develop a method with which a voluminous sandwich fleece can also be achieved with this type of hydrodynamic bonding.
Zur Lösung schlägt die Erfindung vor, die abgelegten, geformten jedenfalls hergestellten Deckvliese vor der Aufgabe der Pulpschicht im Volumen zu erhöhen. Ein solches voluminöseres Vlies und damit das Sandwichprodukt ist dann weicher und angenehmer im Griff. Dies kann durch Stauchen, Kräuseln, hydrodynamisch Behandeln oder Schrumpfen zumindest von Teilen der Fasern der Deckschicht erfolgen. Jedenfalls muss das im Vlies erzeugte Volumen fixiert sein, damit es beim abschließenden Verfestigen durch die Wasservernadelung erhalten bleibt.To solve the problem, the invention proposes to increase the volume of the deposited, shaped cover webs, which are in any case produced, before the pulp layer is added. Such a more voluminous fleece and thus the sandwich product is then softer and more pleasant to the touch. This can be done by compressing, crimping, hydrodynamically treating or shrinking at least parts of the fibers of the cover layer. In any case, the volume generated in the fleece must be fixed so that it is retained by the water needling during the final consolidation.
Durch die US-Re. 31 ,599 ist es bekannt, Endlosfasern nach dem Spinnen in ein Zahnrad zu legen, um ein dreidimensional verformtes Vlies zu bilden, hier erfolgt aber keine Fixierung. Beim Verwenden eines solchen Vlieses nach der Erfindung würde sich die Dreidimensionalität gleich aufheben.By US Re. 31, 599 it is known to place continuous fibers in a gear after spinning in order to form a three-dimensionally deformed fleece, but none of this takes place here Fixation. If such a fleece according to the invention were used, the three-dimensionality would be canceled out immediately.
Es ist auch durch die EP-A-0 540 041 bekannt, ein Stapelfaservlies vor der Aufgabe der Pulpschicht wasserzuvernadeln. Dies erfolgt dort zur Erhöhung der Wasseraufnahmefähigkeit des Vlieses. Nachfolgend wird das Vlies mit einer trockenen Pulpschicht versehen, die durch Druck mit dem nassen Vlies verbunden wird.It is also known from EP-A-0 540 041 to needled a staple fiber fleece before the pulp layer is placed in it. This is done there to increase the water absorption capacity of the fleece. The fleece is then provided with a dry pulp layer, which is connected to the wet fleece by pressure.
Besser ist es, den Pulp in eine Zwischenschicht zu legen, wie es die US-A-4 704 1 12 offenbart. Dort wird zusätzlich zu den Deckvliesen ein Zwischeπvlies gebildet, das Freiräume wie Löcher aufweist, in die dann der Pulp in einer der Dicke des Zwischenvlieses entsprechenden dickeren Schicht eingebracht werden kann. Abgesehen davon, dass ein solcher Sandwichvliesaufbau keine durchgängige Pulpschicht aufweist, kann damit kein Vlies mit einem weicheren Griff erzielt werden.It is better to place the pulp in an intermediate layer as disclosed in US-A-4,704,112. In addition to the cover nonwovens, an intermediate nonwoven is formed there, which has free spaces such as holes, into which the pulp can then be introduced in a thicker layer corresponding to the thickness of the intermediate nonwoven. Apart from the fact that such a sandwich fleece structure does not have a continuous pulp layer, it is not possible to achieve a fleece with a softer handle.
Mit der Idee nach der Erfindung dagegen wird nicht nur ein voluminöses, weicheres Dreilagenvlies erzielt, sondern es kann auch eine dickere Schicht aus Pulpfasern, zumindest in Höhe der Vertiefungen des ersten, des unteren Deckvlieses zwischen die dreidimensional verformten Deckvliese eingebracht werden.With the idea according to the invention, on the other hand, not only is a voluminous, softer three-layer fleece achieved, but also a thicker layer of pulp fibers, at least at the level of the depressions of the first and the lower cover fleece, can be introduced between the three-dimensionally deformed cover fleece.
In der Zeichnung sind zwei Anlagen zur Herstellung des Sandwichvlieses dargestellt. Anhand dieser sollen noch weitere erfinderische Details erläutert werden. Es zeigen: Fig. 1 In schematischer Darstellung eine diskontinuierliche offline Anlage mit einer Vliesvorbehandlung nach der gesonderten Spinneinheit, Fig. 2 eine diskontinuierliche inline Anlage mit einer Vliesvorbehandlung im Anschluss an den Spinnvorgang und Fig. 3 eine Spinnvliesanlage mit Wasservernadelung.In the drawing, two plants for producing the sandwich fleece are shown. Based on this, further inventive details are to be explained. 1 shows a schematic illustration of a discontinuous offline system with a nonwoven pretreatment after the separate spinning unit, FIG. 2 shows a discontinuous inline system with a nonwoven pretreatment after the spinning process, and FIG. 3 shows a spunbonded nonwoven system with water needling.
Beim Spunbondverfahren werden die Endlosfilamente in der Einheit 1 gebildet und auf ein Endlosband 2 abgelegt. Das dabei gebildete Vlies 3 mit einem Gewicht von z. B. 8 - 15 g/m2 ist dann unter Druck thermisch zu verfestigen mittels eines Kalanders 4. Erst jetzt ist das Vlies manipulier- hier aufrollbar. Anschließend ist die Rolle 5 mit dem Spunbondvlies 3 einer gesonderten Maschinenanlage zur Herstellung eines Sandwichvlieses vorzulegen. Diese Anlage besteht dann aus der Rolle 5 für das Bodendeckvlies und einer Einheit zur Erhöhung des Volumens des Vlieses. Nach Fig. 1 ist diese Einheit eine einfache hydrodynamische Vernadelungseinrichtung 6 mit glatter oder besser strukturierter Trommeloberfläche 7. Hier kann auch ein Kalanderwalzenpaar mit zahnradförmig ineinandergreifenden Walzen oder eine Vliesstraucheinrichtung zum Einsatz kommen. Jedenfalls ist das Volumen des kalandrierten Vlieses 3 zu erhöhen, um den Griff des Endproduktes weicher zu bekommen. Anschließend wird dem Vlies eine Pulpschicht aufgeben, z. B. mittels der Air-lay Einrichtung 8. Die Pulpschicht beträgt z. B. 20 - 60 g/m2. Zur Herstellung des vollständigen dreilagigen Sandwichvlieses ist noch das Deckviies von der Rolle 5' aufzugeben, das ebenfalls vor der Auflage auf die Pulpschicht im Volumen möglichst zu erhöhen ist, z. B. durch eine weitere Vor- Spunlace-Einrichtung 6'. Schließlich ist das Dreilagenvlies in seinen Schicht miteinander zu verbinden, und zwar durch eine hydrodynamische Vernadelungseinrichtung 9 mit beidseitiger Wasservernadelung. Abschließend ist das SPS-Vlies in der Vorrichtung 10 zu trocknen und mit der Vorrichtung 1 1 aufzurollen.In the spunbond process, the endless filaments are formed in the unit 1 and placed on an endless belt 2. The fleece 3 formed with a weight of z. B. 8 - 15 g / m 2 is then thermally solidified under pressure by means of a calender 4. Only now can the nonwoven be manipulated and rolled up here. Subsequently, the roll 5 with the spunbond fleece 3 is to be submitted to a separate machine system for producing a sandwich fleece. This system then consists of roll 5 for the ground cover fleece and a unit for increasing the volume of the fleece. According to FIG. 1, this unit is a simple hydrodynamic needling device 6 with a smooth or better structured drum surface 7. Here, a pair of calender rolls with gear meshing rolls or a fleece shrinking device can also be used. In any case, the volume of the calendered nonwoven 3 must be increased in order to soften the grip of the end product. Then the pulp is given a pulp layer, e.g. B. by means of the air-lay device 8. The pulp layer is z. B. 20-60 g / m 2 . In order to produce the complete three-layer sandwich fleece, the top layer of roll 5 'has to be given up. B. by another pre-spunlace device 6 '. Finally, the three-layer fleece is to be connected to one another in its layer, specifically by means of a hydrodynamic needling device 9 with water needling on both sides. Finally, the PLC fleece is to be dried in device 10 and rolled up with device 11.
Eine andere, aber letztendlich auch diskontinuierliche Anlage offenbart die Fig. 2. Dort wird das kalandrierte Vlies 3 vor dem Aufrollen mit der Einheit 5" zuerst im Volumen erhöht. Gemäß der Darstellung erfolgt dies mittels einer einfachen Vor-Spunlace- Einrichtung 6", die also in die Spinnanlage integriert ist. Statt der Nassbehandlung zur Erhöhung des Volumens kann hier auch ein strukturierendes Walzenpaar oder eine Staucheinrichtung denkbar sein . Im Falle der Nassbehandlung sollte ein Trockner 14 folgen, zumindest aber eine Wasserabsaugvorrichtung . Das jetzt erzielte Deckviies auf der Rolle 5' ist bereits im Volumen erhöht und im Griff weich. Es kann jetzt der Sandwichvliesanlage sowohl für das Bodenvlies 5" als auch für das Deckviies 5'" vorgelegt werden. Dazwischen ist der Pulp mit der Einheit 8 aufzulegen und alles zusammen wie gehabt in der Vorrichtung 9 zu verfestigen und zu trocken.Another, but ultimately also discontinuous system is shown in FIG. 2. There, the calendered nonwoven 3 is first increased in volume before rolling up with the unit 5 ". According to the illustration, this is done by means of a simple pre-spunlace device 6" is integrated into the spinning system. Instead of the wet treatment to increase the volume, a structuring pair of rollers or an upsetting device can also be conceivable here. In the case of wet treatment, a dryer 14 should follow, or at least a water suction device. The Deckviies now achieved on the roll 5 'is already increased in volume and soft to the touch. It can now be presented to the sandwich fleece system for both the floor fleece 5 "and for the cover fleece 5 '". In between, the pulp with the unit 8 has to be placed and everything has to be solidified and dry in the device 9 as before.
Die Fig. 3 offenbart eine Spinnvliesanlage gemäß Fig. 2, bei der aber das Walzenpaar 4 mit der Vor-Spunlace-Einrichtung 6" ersetzt ist durch eine Kompaktiereinheit, also mit gegenläufigem Kompaktierband 2', die beide von den Wasserstrahlen eines Düsenbalkens 12 durchströmt werden. Nach dem Kompakteren ist dann das Vlies im Volumen zu erhöhen, was durch den Düsenbalken 13 erfolgt, der auch dem Endlosband 2 zugeordnet ist. Abschließend ist das Vlies zu entwässern durch Absaugung und/oder durch Trocknung. FIG. 3 discloses a spunbonded nonwoven system according to FIG. 2, but in which the pair of rollers 4 with the pre-spunlace device 6 "is replaced by a compacting unit, that is to say with an opposing compacting belt 2 ', both of which are flowed through by the water jets of a nozzle bar 12 After the more compact, the fleece is then increased in volume, which is done by the nozzle bar 13, which is also assigned to the endless belt 2. Finally, the fleece is to be dewatered by suction and / or by drying.

Claims

P a t e n t a n s p r ü c h e : Patent claims:
1 . Verfahren zur Herstellung eines Sandwichvlieses aus zumindest zwei Deckvliesen aus Chemiefasern und/oder Naturfasern und einer mittleren Zwischenschicht aus Pulpfasern, dadurch gekennzeichnet, dass zumindest das untere der abgelegten, geformten jedenfalls hergestellten Deckvliese vor der Aufgabe der Pulpschicht im Volumen erhöht wird.1 . A process for producing a sandwich nonwoven from at least two cover nonwovens made of man-made fibers and / or natural fibers and a middle intermediate layer made of pulp fibers, characterized in that at least the lower of the deposited, shaped, coverings nonwoven produced in any case is increased in volume before the pulp layer is put in place.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das/die Deckvlies/e dreidimensional verformt wird/werden .2. The method according to claim 1, characterized in that the cover fleece (s) is / are three-dimensionally deformed.
3. Verfahren nach Anspruch 1 oder 2, dadurch geke nnzeichnet, dass das/die Deckvlies/e gestaucht wird/werden.3. The method according to claim 1 or 2, characterized in that the cover fleece (s) is / are compressed.
4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass das/die Deckvlies/e geschrumpft wird/werden.4. The method according to claim 1 to 3, characterized in that the cover fleece (s) is / are shrunk.
5. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das/die Deckvlies/e zur Erhöhung des Volumens hydrodynamisch behandelt wird/werden.5. The method according to claim 1 or 2, characterized in that the cover fleece (s) is / are treated hydrodynamically to increase the volume.
6. Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, dass das/die Deckvlies/e aus künstlichen ggf. unmittelbar vorher abgelegten Endlosfilamenten beliebiger Art gebildet wird/werden.6. The method according to claim 1 to 5, characterized in that the cover fleece (s) is / are formed from artificial continuous filaments of any type, possibly immediately previously deposited.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass dem Deckviies auch Bikomponentenfasern beigegeben werden, die nachfolgend zur Erhöhung des Volumens erhitzt werden. 7. The method according to claim 6, characterized in that the deck viies are also added bicomponent fibers, which are subsequently heated to increase the volume.
8. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass als Endlosfilamente die nach dem Spunbond- oder Meltblownverfahren hergestellten verwendet werden.8. The method according to claim 6 or 7, characterized in that the filaments produced by the spunbond or meltblown process are used as continuous filaments.
9. Verfahren nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Endlosfilamente nach dem Spinnen und Ablegen durch ein Walzenpaar thermisch verfestigt und dann zur Erhöhung des Volumens hydrodynamisch behandelt werden .9. The method according to claim 6 or 7, characterized in that the continuous filaments after spinning and depositing are thermally solidified by a pair of rollers and then treated hydrodynamically to increase the volume.
10. Verfahen nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die abgelegten Endlosfilamente unmittelbar anschließend zwischen zwei Bändern kompaktiert und genetzt, dann weiter zur Erhöhung des Volumens wasservernadelt und entwässert werden.10. The method according to claim 6 or 7, characterized in that the deposited filaments immediately afterwards compacted and wetted between two bands, then further needled and dewatered to increase the volume.
1 1 . Verfahren nach Anspruch 9 , dadurch gekennzeichnet, dass die Endlosfilamente nach dem Spinnen und Ablegen durch ein Walzenpaar thermisch verfestigt, zur Erhöhung des Volumens hydrodynamisch behandelt, getrocknet und dann das Vlies aufgewickelt wird, um als Rolle für das/die Deckvlies/e einer Maschinenanlage für ein Sandwichvlies vorgelegt zu werden und dann in einer folgenden Behandlungsphase das von der Rolle wieder abgewickelte , voluminöse Spunbondvlies mit der Pulpschicht und einem weiteren Deckviies vereinigt und insgesamt hydrodynamisch verfestigt wird .1 1. A method according to claim 9, characterized in that, after spinning and depositing, the continuous filaments are thermally solidified by a pair of rollers, hydrodynamically treated to increase the volume, dried and then the fleece is wound up in order to act as a roll for the top fleece / s of a machine system for to be presented with a sandwich fleece and then, in a subsequent treatment phase, the voluminous spunbond fleece unwound from the roll is combined with the pulp layer and another cover fleece and is overall hydrodynamically consolidated.
12. Verfahren nach Anspruch 6 bis 8, dadurch gekennzeichnet, dass die Endlosfilamente nach dem Spinnen und Ablegen durch ein Walzenpaar thermisch verfestigt und dann das Spunbondvlies aufgewickelt wird, um als Rolle für das/die Deckvlies/e einer Maschinenanlage für ein Sandwichvlies vorgelegt zu werden und dabei zunächst in einer vorgeordneten Behandlungsphase das wieder abgewickelte Spunbondvlies vor der Aufgabe der Pulpschicht hydrodynamisch zur Erhöhung des Volumens behandelt wird.12. The method according to claim 6 to 8, characterized in that the continuous filaments after spinning and depositing thermally solidified by a pair of rollers and then the spunbond nonwoven is wound up to be presented as a roll for the cover fleece (s) of a machine system for a sandwich fleece and first of all in a pre-treatment phase the rewound spunbond fleece is treated hydrodynamically to increase the volume before the pulp layer is added.
13. Verfahren nach Anspruch 5 bis 12, dadurch gekennzeichnet, dass dem Vlies beim hydrodynamischen Vernadeln eine vorgegebene Struktur aufgegeben wird. 13. The method according to claim 5 to 12, characterized in that the fleece is given a predetermined structure during hydrodynamic needling.
14. Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, dass das/die Deckvlies/e aus künstlichen Stapelfasern gebildet wird/werden.14. The method according to claim 1 to 5, characterized in that the cover fleece (s) is / are formed from artificial staple fibers.
15. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Fasern des/der Deckvlieses/e stauchgekräuselt werden .15. The method according to any one of the preceding claims, characterized in that the fibers of the cover fleece (s) are crimped.
16. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Deckviies mittels strukturierten und ineinandergreifenden Kalanderwalzen verformt wird.16. The method according to any one of the preceding claims, characterized in that the Deckviies is deformed by means of structured and interlocking calender rolls.
17. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Deckviies über seine ganze Breite in eine Stauchkammer transportiert wird.17. The method according to any one of the preceding claims, characterized in that the Deckviies is transported over its entire width in a stuffer box.
18. Maschinenanlage zur Herstellung eines Sandwichvlieses mit einem das Deckviies transportierenden Endlosband, einem Kalanderwalzenpaar, ggf. später einer Vorrichtung zur Aufgabe der Pulpschicht und einer weiteren Aufgabevorrichtung zur Ablage der anderen Deckschicht, dadurch gekennzeichnet, dass sie vor der Auflageeinrichtung (8) für die Pulpschicht ergänzt ist durch eine Einrichtung (4, 6, 6", 13) zur Erhöhung des Volumens des Vlieses.18. Machine system for the production of a sandwich fleece with an endless belt transporting the cover web, a pair of calender rollers, possibly later a device for feeding the pulp layer and a further feed device for depositing the other cover layer, characterized in that they are in front of the support device (8) for the pulp layer is supplemented by a device (4, 6, 6 ", 13) for increasing the volume of the fleece.
19. Maschinenanlage nach Anspruch 18, dadurch gekennzeichnet, dass das Kalanderwalzenpaar (4) mit zahnradförmig ineinandergreifenden Walzen versehen ist.19. Machine system according to claim 18, characterized in that the pair of calender rollers (4) is provided with rollers which mesh with one another in the form of a gear.
20. Maschinenanlage nach Anspruch 19, dadurch gekennzeichnet, dass für beide Deckvliese ein Kalanderwalzenpaar vorgesehen ist.20. Machine system according to claim 19, characterized in that a pair of calender rolls is provided for both cover webs.
21. Maschinenanlage nach Anspruch 17 bis 20, dadurch gekennzeichnet, dass das Kalanderwalzenpaar durch eine Vlies-Stauchkräuselvorrichtung ersetzt oder ergänzt ist.21. Machine system according to claim 17 to 20, characterized in that the pair of calender rolls is replaced or supplemented by a nonwoven upsetting device.
22. Maschinenanlage nach Anspruch 18, dadurch gekennzeichnet, dass das Kalanderwalzenpaar durch eine hydrodynamische Vernadelungseinrichtung ersetzt oder ergänzt ist (Fig. 2, 3). 22. Machine system according to claim 18, characterized in that the pair of calender rolls is replaced or supplemented by a hydrodynamic needling device (Fig. 2, 3).
23. Maschinenanlage nach Anspruch 22, dadurch gekennzeichnet, dass dem Endlosband (2) der Spinnvliesanlage (1 ) ein gegenläufiges Kompaktierband (2") zugeordnet und diesen ein Wasserbalken (12) zum Netzen und außerhalb des Kompaktierbandes ein weiterer Düsenbalken (13) zur Erhöhung des Volumens des Vlieses 3 angeordnet ist.23. Machine system according to claim 22, characterized in that the endless belt (2) of the spunbond nonwoven system (1) is assigned an opposing compacting belt (2 ") and this a water bar (12) for wetting and outside the compacting belt a further nozzle bar (13) for increasing of the volume of the fleece 3 is arranged.
24. Maschinenanlage nach Anspruch 22 oder 23, dadurch gekennzeichnet, dass die Vernadelungseinrichtung (7) mit einer das Vlies strukturierenden Auflage versehen ist.24. Machine system according to claim 22 or 23, characterized in that the needling device (7) is provided with a pad structuring the fleece.
25. Maschinenanlage zur Herstellung eines Sandwichvlieses aus Endlosfaservliesen bestehend aus einer Vlieslegeeinrichtung, Verfestigungseinrichtung und zunächst einer Aufwickeleinrichtung, dadurch gekennzeichnet, dass die Verfestigungs- wie Vorbehandlungseinrichtung aus einem erhitzten Kalanderwalzenpaar (4), einer Wasservernadelungseinrichtung (6") und ggf. einem Trockner besteht.25. Machine system for producing a sandwich fleece from continuous fiber fleeces consisting of a fleece laying device, consolidation device and initially a winding device, characterized in that the consolidation and pretreatment device consists of a heated pair of calender rolls (4), a water needling device (6 ") and possibly a dryer.
26. Maschinenanlage zur Herstellung eines Sandwichvlieses aus Endlosfaservliesen nach dem Spunbondverfahren bestehend aus einer vorgeordneten Vlieslegeeinrichtung mit Verfestigungseinrichtung und zunächst einer Aufwickeleinrichtung, dadurch gekennzeichnet, dass sie weiterhin besteht aus einer Abwickeleinrichtung (5) einer folgenden Wasservernadelungseinrichtung (6, 7) zur Erhöhung des Volumens des Spunbondvlieses und dann der Aufgabevorrichtung (8) für die Pulpschicht und einer weiteren Einheit (5') zur Vorlage einer gleich ausgebildeten Deckschicht, schließlich einer Wasservernadelungseinrichtung (9) mit beidseitiger Verfestigung und einer Trockeneinrichtung (10). 26. Machine system for the production of a sandwich fleece from continuous fiber fleeces according to the spunbond process consisting of an upstream fleece laying device with a strengthening device and initially a winding device, characterized in that it further consists of an unwinder (5) of a subsequent water needling device (6, 7) to increase the volume of the Spunbond fleece and then the feed device (8) for the pulp layer and a further unit (5 ') for presenting a cover layer of the same design, finally a water needling device (9) with consolidation on both sides and a drying device (10).
EP04766385A 2003-10-22 2004-07-30 Method for the production of a voluminous sandwiched non-woven material from at least two cover non-woven materials and an inner pulp layer and machine unit for the same Withdrawn EP1678362A1 (en)

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DE10349531A DE10349531A1 (en) 2003-10-22 2003-10-22 Process for the production of a voluminous sandwich fleece from at least two cover fleeces and central pulp layer
PCT/EP2004/051677 WO2005040478A1 (en) 2003-10-22 2004-07-30 Method for the production of a voluminous sandwiched non-woven material from at least two cover non-woven materials and an inner pulp layer and machine unit for the same

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