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DE3724510A1 - Nonwoven textile web of thermoplastic material and manufacture thereof - Google Patents

Nonwoven textile web of thermoplastic material and manufacture thereof

Info

Publication number
DE3724510A1
DE3724510A1 DE19873724510 DE3724510A DE3724510A1 DE 3724510 A1 DE3724510 A1 DE 3724510A1 DE 19873724510 DE19873724510 DE 19873724510 DE 3724510 A DE3724510 A DE 3724510A DE 3724510 A1 DE3724510 A1 DE 3724510A1
Authority
DE
Germany
Prior art keywords
plastic film
calender
textile web
cracks
layer
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Withdrawn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
DE19873724510
Other languages
German (de)
Inventor
Ekkehard Labitzke
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.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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 Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to DE19873724510 priority Critical patent/DE3724510A1/en
Publication of DE3724510A1 publication Critical patent/DE3724510A1/en
Withdrawn legal-status Critical Current

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
    • 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
    • D04H3/14—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 yarns or filaments produced by welding
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/06—Embossing
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
    • D06N3/0052—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by leaching out of a compound, e.g. water soluble salts, fibres or fillers; obtained by freezing or sublimation; obtained by eliminating drops of sublimable fluid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0092—Non-continuous polymer coating on the fibrous substrate, e.g. plastic dots on fabrics
    • 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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/121—Permeability to gases, adsorption
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/126—Permeability to liquids, absorption
    • D06N2209/128—Non-permeable
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2213/00—Others characteristics
    • D06N2213/04—Perforated layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

Nonwoven textile web of thermoplastic material with at least one spunbonded ply and at least one apertured covering. The spunbonded ply exhibits interbonding welds of its polymer fibres, produced by hot embossing rolls of a calender and arranged according to a predetermined pattern. The covering is joined to spunbonded plies by forces of adhesion. The covering is a thin film of plastic from 1 to 30 mu m in thickness. The plastic film is joined to the spunbonded ply in the region of the welds. The apertures are microscopically fine cracks in the transition region between the joining points of the plastic film with the spunbonded ply and the rest of the plastic film web. A process for manufacture is also specified. <IMAGE>

Description

Die Erfindung bezieht sich gattungsgemäß auf eine nichtgewebte Tex­ tilbahn aus thermoplastischem Kunststoff - mit zumindest einer Spinn­ vlieslage und zumindest einer Abdeckung, die Öffnungen aufweist, wobei die Spinnvlieslage durch beheizte Prägewalzen eines Kalanders erzeugte, nach vorgegebenem Raster angeordnete Verbundverschweißungen ihrer Kunststoffasern aufweist und die Abdeckung stoffschlüs­ sig mit der Spinnvlieslage vereinigt ist. Die Erfindung bezieht sich fernerhin auf ein Verfahren zur Herstellung einer solchen Textilbahn. Die Verbundverschweißungen können punktförmig angeordnet sein oder linienförmig verlaufen. - Bei den Kunststoffasern der Spinnvlieslage kann es sich um Endlosfasern oder um Stapelfasern handeln. Der Ausdruck stoffschlüssige Verbindung bezeichnet die Tatsache, daß zwischen der Abdeckung und einzelnen Kunststoffasern eine Schweiß­ verbindung besteht. Eine Textilbahn aus zumindest einer Spinnvlies­ lage ist luftdurchlässig und wasserdurchlässig. Die Durchlässigkeit ist abhängig vom spezifischen Flächengewicht der Spinnvliesbahn. Es ist nicht ohne weiteres möglich, bei der Herstellung einer solchen Spinnvliesbahn die Ausrüstung so zu treffen, daß die fertige Textil­ bahn zwar luftdurchlässig, nicht jedoch wasserdurchlässig ist.The invention relates generically to a non-woven textile web made of thermoplastic material - with at least one spunbonded nonwoven layer and at least one cover which has openings, the spunbonded layer produced by heated embossing rollers of a calender, having composite welds of its plastic fibers arranged according to a predetermined pattern, and the cover being materially bonded sig is combined with the spunbonded layer. The invention further relates to a method for producing such a textile web. The composite welds can be arranged in a punctiform manner or can run linearly. - The plastic fibers of the spunbond layer can be continuous fibers or staple fibers. The term integral connection denotes the fact that there is a welded connection between the cover and individual plastic fibers. A textile web of at least one spunbonded layer is permeable to air and water permeable. The permeability depends on the specific basis weight of the spunbonded nonwoven web. It is not readily possible to make the equipment in the manufacture of such a spunbonded web so that the finished textile web is air-permeable but not water-permeable.

Bei der Herstellung der (aus der Praxis) bekannten gattungsgemäßen Textilbahn wird zunächst eine Spinnvliesbahn mit den Verbundver­ schweißungen versehen. Die Abdeckung wird nachträglich aufkaschiert. Die Öffnungen in der Abdeckung sind makroskopische Öffnungen und beeinflussen die Luftdurchlässigkeit sowie die Wasserdurchlässigkeit im allgemeinen nicht. Andererseits verlangt die Praxis, z. B. für die medizinische oder hygienische Verwendung solcher Textilbahnen, gute Luftdurchlässigkeit, jedoch Wasserundurchlässigkeit.In the production of the generic (known from practice) Textile web is initially a spunbonded nonwoven web with the Verbundver welds. The cover is subsequently laminated on. The openings in the cover are macroscopic openings and influence the air permeability as well as the water permeability generally not. On the other hand, practice requires e.g. B. for the medical or hygienic use of such textile webs, good air permeability but water impermeability.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Tex­ tilbahn so weiter auszubilden, daß sie bei guter Luftdurchlässigkeit praktisch wasserundurchlässig ist. Der Erfindung liegt fernerhin die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem eine solche Textilbahn auf besonders einfache Weise hergestellt werden kann.The invention has for its object a generic text train tilbahn so that it has good air permeability is practically impermeable to water. The invention also lies the task of specifying a method with which such Textile web can be produced in a particularly simple manner.

Zur Lösung dieser Aufgabe lehrt die Erfindung, daß die Abdeckung aus einer dünnen Kunststoffolie besteht, die eine Dicke im Bereich von 1 bis 30 µm aufweist, daß die Kunststoffolie im Bereich der Ver­ bundverschweißungen mit der Spinnvlieslage vereinigt ist und daß die Öffnungen aus mikroskopisch feinen (durch die Einwirkung von Druck und Wärme bei der Herstellung der Verbundverschweißungen erzeugten) Rissen im Übergangsbereich zwischen Vereinigungspunkten der Kunststoffolie mit der Spinnvlieslage und der übrigen Kunststoffolie bestehen. Die Vereinigungspunkte können zu Bereichen aufge­ weitet sein. Die Risse bilden feine Schlitze. Sie können, insbesondere bei Anwendung des weiter unten beschriebenen Verfahrens zur Her­ stellung der Textilbahn, ohne weiteres so eingestellt werden, daß die Risse als Luftaustauschöffnungen funktionieren, jedoch in bezug auf flüssiges Wasser, auch in feinsten Tröpfchen, undurchlässig sind. Nach bevorzugter Ausführungsform der Erfindung weisen die Risse in der Kunststoffolie eine Länge von maximal 1 mm auf, und zwar in Flächenbereichen von maximal 1 mm2. Nach bevorzugter Ausfüh­ rungsform der Erfindung besitzen die Risse fernerhin, bei mikrosko­ pischer Betrachtung, einen ausgefransten Rand sowie in die Riß­ öffnung hineinragende Folienfahnen oder Folienfasern.To achieve this object, the invention teaches that the cover consists of a thin plastic film that has a thickness in the range of 1 to 30 microns, that the plastic film is united in the area of welded joints with the spunbond layer and that the openings made of microscopic ( there are cracks in the transition area between the points of union of the plastic film with the spunbond layer and the other plastic film. The union points can be expanded to areas. The cracks form fine slits. You can, especially when using the method for the manufacture of the textile web described below, easily adjusted so that the cracks function as air exchange openings, but are impermeable to liquid water, even in the finest droplets. According to a preferred embodiment of the invention, the cracks in the plastic film have a maximum length of 1 mm, specifically in surface areas of a maximum of 1 mm 2 . According to a preferred embodiment of the invention, the cracks further have, when viewed microscopically, a frayed edge and film tabs or film fibers projecting into the crack opening.

Die Erfindung nutzt die Tatsache, daß zur Herstellung einer Textil­ bahn, die einerseits in der beschriebenen Weise aus zumindest einer Spinnvlieslage und andererseits aus einer Abdeckung besteht, es nicht erforderlich ist, die Abdeckung vor der Vereinigung mit der Spinnvlieslage mit gestanzten Perforierungen o. dgl. zu versehen. Gestanzte Perforierungen o. dgl. führen zu makroskopischen Öffnun­ gen, die nicht nur Luft, sondern auch Flüssigkeit passieren lassen. Die Erfindung nutzt die Tatsache, daß dann, wenn die Abdeckung in der angegebenen Weise aus einer dünnen Kunststoffolie besteht und wenn die Kunststoffolie im Bereich der Verbundverschweißungen mit der Spinnvlieslage stoffschlüssig vereinigt wird, Öffnungen in Form von feinen Rissen im Übergangsbereich zwischen den Vereini­ gungspunkten oder Vereinigungsbereichen der Kunststoffolie und der Spinnvlieslage entstehen, die eine ausreichende Luftdurchlässigkeit sicherstellen, jedoch wasserundurchlässig sind. Gegenstand der Erfin­ dung ist auch ein Verfahren zur Herstellung einer solchen nichtge­ webten Textilbahn, wobei zunächst ein ein- oder mehrlagiges Spinn­ vlies aus Endlosfasern oder Stapelfasern erzeugt und dieses durch einen Kalander hindurchgeführt wird. Das Verfahren ist dadurch gekennzeichnet, daß zusammen mit dem Spinnvlies oberseitig und/oder unterseitig eine Kunststoffolie der Foliendicke von 1 bis 30 µm in den Kalander eingeführt wird, und zwar in Kontakt mit der Ober­ flächenprofilierung der Kalanderwalze, und daß die Kalandrierungs­ temperatur und der Kalandrierungsdruck so eingestellt werden, daß in der Kunststoffolie im Übergangsbereich zwischen den Vereinigungs­ punkten der Kunststoffolie mit der Spinnvlieslage und der übrigen Kunststoffolienbahn feine Risse entstehen, die in der beschriebenen Weise funktionieren. - Es versteht sich, daß es nicht erforderlich ist, die Kunststoffolie separat in den Kalander einzuführen. Das Spinnvlies kann auch auf der Kunststoffolie abgelegt oder auf andere Weise mit der Kunststoffolie versehen werden.The invention takes advantage of the fact that to manufacture a textile web, on the one hand in the manner described from at least one Spunbonded layer and on the other hand consists of a cover, it  does not require coverage before merging with the Spunbonded layer to be provided with punched perforations or the like. Punched perforations or the like lead to macroscopic openings conditions that allow not only air but also liquid to pass through. The invention takes advantage of the fact that when the cover consists of a thin plastic film in the specified manner and if the plastic film in the area of the composite welds is cohesively combined with the spunbond layer, openings in Form of fine cracks in the transition area between the clubs junction points or areas of association of the plastic film and the Spunbonded layer arise, which has sufficient air permeability ensure, but are impermeable to water. Object of the inven manure is also a method for producing such a nonge weave textile web, initially a single or multi-layer spinning fleece made of continuous fibers or staple fibers and this through a calender is passed through. The procedure is thereby characterized in that together with the spunbonded nonwoven and / or on the underside a plastic film with a film thickness of 1 to 30 µm the calender is inserted, in contact with the upper surface profiling of the calender roll, and that the calendering temperature and the calendering pressure are set so that in the plastic film in the transition area between the union score the plastic film with the spunbond layer and the rest Plastic sheeting creates fine cracks, which are described in the Way work. - It is understood that it is not necessary is to insert the plastic film separately into the calender. The Spunbond can also be placed on the plastic film or on others Be provided with the plastic film.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausfüh­ rungsbeispiel darstellenden Zeichnung ausführlicher erläutert. Es zeigen in schematischer DarstellungIn the following, the invention is based on only one embodiment Example illustrating the drawing explained in more detail. It  show in a schematic representation

Fig. 1 eine Anlage zur Durchführung des erfindungsgemäßen Verfah­ rens in Seitenansicht, Fig. 1 shows a plant for carrying out the procedural proceedings invention in side view,

Fig. 2 in gegenüber der Natur wesentlich vergrößertem Maßstab eine Draufsicht auf eine erfindungsgemäße Textilbahn und Fig. 2 in a significantly enlarged scale compared to nature, a top view of a textile web according to the invention and

Fig. 3 einen Schnitt in Richtung A-B durch den Gegenstand nach Fig. 1. Fig. 3 is a section in direction A by the subject matter of FIG. 1.

Die in Fig. 1 dargestellte Anlage dient zur Herstellung einer nicht­ gewebten Textilbahn. Sie besteht aus einem ersten Maschinenaggre­ gat 1, welches eine ein- oder mehrlagige Spinnvliesbahn 2 aus End­ losfasern der Stapelfasern erzeugt. Die Anlage besteht fernerhin aus einem zweiten Maschinenaggregat, einem Kalander 3, durch welchen die Spinnvliesbahn 2 hindurchgeführt wird. Der Kalander 3 besitzt eine obere und eine untere Kalanderwalze 4 bzw. 5, die auf Kalan­ drierungstemperatur beheizt sind. Eine der Kalanderwalzen, im Aus­ führungsbeispiel die untere 5, besitzt eine Oberflächenprofilierung aus patrizenartig vorstehenden Formgebungselementen 6 für die Ver­ bundverschweißungen 7, die oben bereits beschrieben wurden und zu denen auf die Fig. 3 verwiesen wird. Die Spinnvliesbahn 2 wird in dem Kalander 3 unter Anwendung des Kalandrierungsdruckes und der Kalandrierungswärme kalibriert und mit den Verbundverschweißun­ gen 7 versehen. Zusammen mit der Spinnvliesbahn 2 wird oberseitig eine Kunststoffolie 8 der Foliendicke 1 bis 30 µm in den Kalander 3 eingeführt, und zwar in Kontakt mit der Oberflächenprofilierung der Kalanderwalze 4. Dabei verbindet sich die Kunststoffolie 8 im Bereich der Verbundverschweißungen 7 mit der Spinnvliesbahn 2 an besonderen Vereinigungspunkten 9, die Kalibrierungstemperatur und der Kalibrierungsdruck werden so eingestellt, daß die Kunststoffolie 8 im Übergangsbereich zwischen den Vereinigungspunkten 9 der Kunststoffolie 8 mit der Spinnvliesbahn 2 und der übrigen Kunststoffolie mikroskopisch feine Risse 10 oder Schlitze bilden. Auf diese Weise entstehen Luftaustauschöffnungen, während diese Risse 10 in bezug auf flüssiges Wasser vollkommen undurchlässig sind.The system shown in Fig. 1 is used to produce a non-woven textile web. It consists of a first machine unit gat 1 , which produces a single or multi-layer spunbond web 2 from end loose fibers of the staple fibers. The system also consists of a second machine unit, a calender 3 , through which the spunbonded nonwoven web 2 is passed. The calender 3 has an upper and a lower calender roll 4 and 5 , which are heated to calendering temperature. One of the calender rolls, in the example from the lower 5 , has a surface profile made of male-like protruding shaping elements 6 for the composite welds 7 , which have already been described above and to which reference is made to FIG. 3. The spunbonded nonwoven web 2 is calibrated in the calender 3 using the calendering pressure and the calendering heat and provided with the composite weldings 7 . Together with the spunbonded nonwoven web 2 , a plastic film 8 with a film thickness of 1 to 30 μm is introduced into the calender 3 on the upper side, namely in contact with the surface profile of the calender roll 4 . The plastic film 8 connects in the area of the composite welds 7 with the spunbonded web 2 at special union points 9 , the calibration temperature and the calibration pressure are set so that the plastic film 8 in the transition area between the union points 9 of the plastic film 8 with the spunbonded web 2 and the other plastic film Form microscopic cracks 10 or slits. In this way, air exchange openings are created, while these cracks 10 are completely impermeable to liquid water.

Die Gestaltung der fertigen Textilbahn in bezug auf diese Maßnahmen und Merkmale entnimmt man insbes. aus den Fig. 2 und 3. Hier sind die Risse oder Schlitze 10 aus Maßstabsgründen übertrieben groß gezeichnet. Sie mögen eine Länge von maximal 1 mm aufweisen. An­ gedeutet wurde, daß bei mikroskopischer Betrachtung die Schlitze 10 einen ausgefransten Rand erkennen lassen und in den Schlitz hin­ einragende Folienfahnen oder Folienfasern 11 aufweisen, die zur Was­ serundurchlässigkeit beitragen. Insoweit handelt es sich bei der Wasserundurchlässigkeit um einen Oberflächenspannungseffekt.The design of the finished textile web with respect to these measures and features can be seen in particular from FIGS. 2 and 3. Here the cracks or slits 10 are drawn exaggeratedly large for reasons of scale. They may have a maximum length of 1 mm. It was indicated that, when viewed microscopically, the slits 10 show a frayed edge and have film lugs or film fibers 11 protruding into the slit, which contribute to the impermeability to water. In this respect, the impermeability to water is a surface tension effect.

Claims (5)

1. Nichtgewebte Textilbahn aus thermoplastischem Kunststoff mit zumindest einer Spinnvlieslage und zumindest einer Abdeckung, die Öffnungen aufweist, wobei die Spinnvlieslage durch beheizte Prägewalzen eines Kalanders erzeugte, nach vorgegebenem Raster angeordnete Verbundverschweißungen ihrer Kunststoffasern aufweist und die Abdeckung stoffschlüs­ sig mit der Spinnvlieslage vereinigt ist, dadurch gekennzeichnet, daß die Abdeckung aus einer dünnen Kunst­ stoffolie (8) besteht, die eine Dicke im Bereich von 1 bis 30 µm auf­ weist, daß die Kunststoffolie (8) im Bereich der Verbundverschweißungen (7) mit der Spinnvlieslage (2) vereinigt ist und daß die Öff­ nungen aus mikroskopisch feinen (durch die Einwirkung von Druck und Wärme bei der Herstellung der Verbundverschweißungen erzeugten) Rissen (10) im Übergangsbereich zwischen Vereinigungspunkten (9) der Kunststoffolie (8) mit der Spinnvlieslage (2) und der übrigen Kunststoffolie bestehen.1. Nonwoven textile web made of thermoplastic material with at least one spunbond layer and at least one cover which has openings, the spunbond layer having heated embossing rolls of a calender, has composite welds of its plastic fibers arranged according to a predetermined pattern and the cover is integrally united with the spunbond layer, thereby characterized in that the cover consists of a thin plastic film ( 8 ), which has a thickness in the range of 1 to 30 microns, that the plastic film ( 8 ) in the area of the composite welds ( 7 ) with the spunbond layer ( 2 ) is combined and that the openings from microscopic (caused by the action of pressure and heat in the manufacture of the composite welds) cracks ( 10 ) in the transition area between the union points ( 9 ) of the plastic film ( 8 ) with the spunbond layer ( 2 ) and the other plastic film. 2. Textilbahn nach Anspruch 1, dadurch gekennzeichnet, daß die Risse (10) als Luftaustauschöffnungen, aber wasserundurchlässig, ausgeführt sind.2. Textile web according to claim 1, characterized in that the cracks ( 10 ) are designed as air exchange openings, but impermeable to water. 3. Textilbahn nach einem der Ansprüche 1 oder 2, dadurch gekenn­ zeichnet, daß die Risse (10) in der Kunststoffolie (8) eine Länge von maximal 1 mm aufweisen.3. Textile web according to one of claims 1 or 2, characterized in that the cracks ( 10 ) in the plastic film ( 8 ) have a maximum length of 1 mm. 4. Textilbahn nach einem der Ansprüche 1 bis 3, dadurch gekenn­ zeichnet, daß die Risse (10), bei mikroskopischer Betrachtung, einen ausgefransten Rand sowie in die Rißöffnung hineinragende Folienfah­ nen oder Folienfasern (11) aufweisen.4. Textile web according to one of claims 1 to 3, characterized in that the cracks ( 10 ), when viewed microscopically, a frayed edge and protruding into the crack opening Folienfah NEN or film fibers ( 11 ). 5. Verfahren zur Herstellung einer nichtgewebten Textilbahn nach einem der Ansprüche 1 bis 4, wobei zunächst ein einlagiges oder mehrlagiges Spinnvlies erzeugt und dieses durch einen Kalander hin­ durchgeführt wird, welcher Kalander zumindest eine obere und eine untere Kalan­ derwalze aufweist, die auf Kalandrierungstemperatur beheizt sind und von denen zumindest eine eine Oberflächenprofilie­ rung aus patrizenartig vorstehenden Formgebungselementen für die Herstellung von Verbundverschweißungen aufweist, und wobei das Spinnvlies in dem Kalander unter Anwendung von Ka­ landrierungsdruck und Kalandrierungswärme kalibriert und mit den Verbundverschweißungen versehen wird, dadurch ge­ kennzeichnet, daß zusammen mit dem Spinnvlies (2) ober­ seitig und/oder unterseitig eine Kunststoffolie (8) der Foliendicke von 1 bis 30 µm in den Kalander (3) eingeführt wird, und zwar in Kontakt mit der Oberflächenprofilierung (6) der Kalanderwalze (5), und daß die Kalandrierungstemperatur sowie der Kalandrierungs­ druck so eingestellt werden, daß in der Kunststoffolie (8) im Über­ gangsbereich zwischen Vereinigungspunkten (9) der Kunststoffolie (9) mit der Spinnvlieslage (2) und der übrigen Kunststoffolienbahn Risse (10) entstehen.5. A method for producing a non-woven textile web according to one of claims 1 to 4, wherein firstly a single-layer or multi-layer spunbond is produced and this is carried out by a calender, which calender has at least one upper and one lower calender roll which are heated to the calendering temperature and of which at least one has a surface profiling of male-like protruding shaping elements for the production of composite welds, and wherein the spunbond in the calender is calibrated using calendering pressure and calendering heat and provided with the composite welds, characterized in that together with the spunbonded fabric ( 2 ) on the top and / or underside, a plastic film ( 8 ) of the film thickness of 1 to 30 microns is inserted into the calender ( 3 ), in contact with the surface profile ( 6 ) of the calender roll ( 5 ), and that the calendering temperature and the calendering pressure can be set so that cracks ( 10 ) are formed in the plastic film ( 8 ) in the transition region between union points ( 9 ) of the plastic film ( 9 ) with the spunbond layer ( 2 ) and the other plastic film web.
DE19873724510 1987-07-24 1987-07-24 Nonwoven textile web of thermoplastic material and manufacture thereof Withdrawn DE3724510A1 (en)

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Publication number Priority date Publication date Assignee Title
DE3919166A1 (en) * 1989-06-12 1990-12-13 Aoe Plastic Gmbh FLEXIBLE SURFACE MATERIAL WITH A PERFORATED PLASTIC FILM AND A FIBER LAYER AND METHOD FOR PRODUCING THE SAME
EP0453968A2 (en) * 1990-04-21 1991-10-30 Hoechst Aktiengesellschaft Casing sheet
EP0453968A3 (en) * 1990-04-21 1993-02-17 Hoechst Aktiengesellschaft Casing sheet
US5882769A (en) * 1992-12-29 1999-03-16 Kimberly-Clark Worldwide, Inc. Stretch-pillowed, bulked laminate
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US6653523B1 (en) 1994-12-20 2003-11-25 Kimberly-Clark Worldwide, Inc. Low gauge films and film/nonwoven laminates
US6015764A (en) 1996-12-27 2000-01-18 Kimberly-Clark Worldwide, Inc. Microporous elastomeric film/nonwoven breathable laminate and method for making the same
US6037281A (en) 1996-12-27 2000-03-14 Kimberly-Clark Worldwide, Inc. Cloth-like, liquid-impervious, breathable composite barrier fabric
US6111163A (en) 1996-12-27 2000-08-29 Kimberly-Clark Worldwide, Inc. Elastomeric film and method for making the same
EP0976543A1 (en) * 1998-07-01 2000-02-02 Kuraray Co., Ltd. Laminate and method of bonding it to a substrate
DE19909839A1 (en) * 1999-03-06 2000-09-14 4 P Folie Forchheim Gmbh Packaging sleeve
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US20140363625A1 (en) * 2013-06-11 2014-12-11 Chen-Cheng Huang Breathable and waterproof composite fabric
US9713914B2 (en) * 2013-06-11 2017-07-25 Chen-Cheng Huang Breathable and waterproof composite fabric
US10391736B2 (en) 2013-06-11 2019-08-27 Chen-Cheng Huang Breathable and waterproof composite fabric and a method of making the same

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